drivers/gpu/drm/i915/intel_display.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/input.h>
  29 #include <linux/i2c.h>
  30 #include <linux/kernel.h>
  31 #include <linux/slab.h>
  32 #include <linux/vgaarb.h>
  33 #include "drmP.h"
  34 #include "intel_drv.h"
  35 #include "i915_drm.h"
  36 #include "i915_drv.h"
  37 #include "i915_trace.h"
  38 #include "drm_dp_helper.h"
  39
  40 #include "drm_crtc_helper.h"
  41
  42 #define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
  43
  44 bool intel_pipe_has_type (struct drm_crtc *crtc, int type);
  45 static void intel_update_watermarks(struct drm_device *dev);
  46 static void intel_increase_pllclock(struct drm_crtc *crtc);
  47 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
  48
  49 typedef struct {
  50     /* given values */
  51     int n;
  52     int m1, m2;
  53     int p1, p2;
  54     /* derived values */
  55     int dot;
  56     int vco;
  57     int m;
  58     int p;
  59 } intel_clock_t;
  60
  61 typedef struct {
  62     int min, max;
  63 } intel_range_t;
  64
  65 typedef struct {
  66     int dot_limit;
  67     int p2_slow, p2_fast;
  68 } intel_p2_t;
  69
  70 #define INTEL_P2_NUM                  2
  71 typedef struct intel_limit intel_limit_t;
  72 struct intel_limit {
  73     intel_range_t   dot, vco, n, m, m1, m2, p, p1;
  74     intel_p2_t      p2;
  75     bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
  76                       int, int, intel_clock_t *);
  77 };
  78
  79 #define I8XX_DOT_MIN              25000
  80 #define I8XX_DOT_MAX             350000
  81 #define I8XX_VCO_MIN             930000
  82 #define I8XX_VCO_MAX            1400000
  83 #define I8XX_N_MIN                    3
  84 #define I8XX_N_MAX                   16
  85 #define I8XX_M_MIN                   96
  86 #define I8XX_M_MAX                  140
  87 #define I8XX_M1_MIN                  18
  88 #define I8XX_M1_MAX                  26
  89 #define I8XX_M2_MIN                   6
  90 #define I8XX_M2_MAX                  16
  91 #define I8XX_P_MIN                    4
  92 #define I8XX_P_MAX                  128
  93 #define I8XX_P1_MIN                   2
  94 #define I8XX_P1_MAX                  33
  95 #define I8XX_P1_LVDS_MIN              1
  96 #define I8XX_P1_LVDS_MAX              6
  97 #define I8XX_P2_SLOW                  4
  98 #define I8XX_P2_FAST                  2
  99 #define I8XX_P2_LVDS_SLOW             14
 100 #define I8XX_P2_LVDS_FAST             7
 101 #define I8XX_P2_SLOW_LIMIT       165000
 102
 103 #define I9XX_DOT_MIN              20000
 104 #define I9XX_DOT_MAX             400000
 105 #define I9XX_VCO_MIN            1400000
 106 #define I9XX_VCO_MAX            2800000
 107 #define PINEVIEW_VCO_MIN                1700000
 108 #define PINEVIEW_VCO_MAX                3500000
 109 #define I9XX_N_MIN                    1
 110 #define I9XX_N_MAX                    6
 111 /* Pineview's Ncounter is a ring counter */
 112 #define PINEVIEW_N_MIN                3
 113 #define PINEVIEW_N_MAX                6
 114 #define I9XX_M_MIN                   70
 115 #define I9XX_M_MAX                  120
 116 #define PINEVIEW_M_MIN                2
 117 #define PINEVIEW_M_MAX              256
 118 #define I9XX_M1_MIN                  10
 119 #define I9XX_M1_MAX                  22
 120 #define I9XX_M2_MIN                   5
 121 #define I9XX_M2_MAX                   9
 122 /* Pineview M1 is reserved, and must be 0 */
 123 #define PINEVIEW_M1_MIN               0
 124 #define PINEVIEW_M1_MAX               0
 125 #define PINEVIEW_M2_MIN               0
 126 #define PINEVIEW_M2_MAX               254
 127 #define I9XX_P_SDVO_DAC_MIN           5
 128 #define I9XX_P_SDVO_DAC_MAX          80
 129 #define I9XX_P_LVDS_MIN               7
 130 #define I9XX_P_LVDS_MAX              98
 131 #define PINEVIEW_P_LVDS_MIN                   7
 132 #define PINEVIEW_P_LVDS_MAX                  112
 133 #define I9XX_P1_MIN                   1
 134 #define I9XX_P1_MAX                   8
 135 #define I9XX_P2_SDVO_DAC_SLOW                10
 136 #define I9XX_P2_SDVO_DAC_FAST                 5
 137 #define I9XX_P2_SDVO_DAC_SLOW_LIMIT      200000
 138 #define I9XX_P2_LVDS_SLOW                    14
 139 #define I9XX_P2_LVDS_FAST                     7
 140 #define I9XX_P2_LVDS_SLOW_LIMIT          112000
 141
 142 /*The parameter is for SDVO on G4x platform*/
 143 #define G4X_DOT_SDVO_MIN           25000
 144 #define G4X_DOT_SDVO_MAX           270000
 145 #define G4X_VCO_MIN                1750000
 146 #define G4X_VCO_MAX                3500000
 147 #define G4X_N_SDVO_MIN             1
 148 #define G4X_N_SDVO_MAX             4
 149 #define G4X_M_SDVO_MIN             104
 150 #define G4X_M_SDVO_MAX             138
 151 #define G4X_M1_SDVO_MIN            17
 152 #define G4X_M1_SDVO_MAX            23
 153 #define G4X_M2_SDVO_MIN            5
 154 #define G4X_M2_SDVO_MAX            11
 155 #define G4X_P_SDVO_MIN             10
 156 #define G4X_P_SDVO_MAX             30
 157 #define G4X_P1_SDVO_MIN            1
 158 #define G4X_P1_SDVO_MAX            3
 159 #define G4X_P2_SDVO_SLOW           10
 160 #define G4X_P2_SDVO_FAST           10
 161 #define G4X_P2_SDVO_LIMIT          270000
 162
 163 /*The parameter is for HDMI_DAC on G4x platform*/
 164 #define G4X_DOT_HDMI_DAC_MIN           22000
 165 #define G4X_DOT_HDMI_DAC_MAX           400000
 166 #define G4X_N_HDMI_DAC_MIN             1
 167 #define G4X_N_HDMI_DAC_MAX             4
 168 #define G4X_M_HDMI_DAC_MIN             104
 169 #define G4X_M_HDMI_DAC_MAX             138
 170 #define G4X_M1_HDMI_DAC_MIN            16
 171 #define G4X_M1_HDMI_DAC_MAX            23
 172 #define G4X_M2_HDMI_DAC_MIN            5
 173 #define G4X_M2_HDMI_DAC_MAX            11
 174 #define G4X_P_HDMI_DAC_MIN             5
 175 #define G4X_P_HDMI_DAC_MAX             80
 176 #define G4X_P1_HDMI_DAC_MIN            1
 177 #define G4X_P1_HDMI_DAC_MAX            8
 178 #define G4X_P2_HDMI_DAC_SLOW           10
 179 #define G4X_P2_HDMI_DAC_FAST           5
 180 #define G4X_P2_HDMI_DAC_LIMIT          165000
 181
 182 /*The parameter is for SINGLE_CHANNEL_LVDS on G4x platform*/
 183 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MIN           20000
 184 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MAX           115000
 185 #define G4X_N_SINGLE_CHANNEL_LVDS_MIN             1
 186 #define G4X_N_SINGLE_CHANNEL_LVDS_MAX             3
 187 #define G4X_M_SINGLE_CHANNEL_LVDS_MIN             104
 188 #define G4X_M_SINGLE_CHANNEL_LVDS_MAX             138
 189 #define G4X_M1_SINGLE_CHANNEL_LVDS_MIN            17
 190 #define G4X_M1_SINGLE_CHANNEL_LVDS_MAX            23
 191 #define G4X_M2_SINGLE_CHANNEL_LVDS_MIN            5
 192 #define G4X_M2_SINGLE_CHANNEL_LVDS_MAX            11
 193 #define G4X_P_SINGLE_CHANNEL_LVDS_MIN             28
 194 #define G4X_P_SINGLE_CHANNEL_LVDS_MAX             112
 195 #define G4X_P1_SINGLE_CHANNEL_LVDS_MIN            2
 196 #define G4X_P1_SINGLE_CHANNEL_LVDS_MAX            8
 197 #define G4X_P2_SINGLE_CHANNEL_LVDS_SLOW           14
 198 #define G4X_P2_SINGLE_CHANNEL_LVDS_FAST           14
 199 #define G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT          0
 200
 201 /*The parameter is for DUAL_CHANNEL_LVDS on G4x platform*/
 202 #define G4X_DOT_DUAL_CHANNEL_LVDS_MIN           80000
 203 #define G4X_DOT_DUAL_CHANNEL_LVDS_MAX           224000
 204 #define G4X_N_DUAL_CHANNEL_LVDS_MIN             1
 205 #define G4X_N_DUAL_CHANNEL_LVDS_MAX             3
 206 #define G4X_M_DUAL_CHANNEL_LVDS_MIN             104
 207 #define G4X_M_DUAL_CHANNEL_LVDS_MAX             138
 208 #define G4X_M1_DUAL_CHANNEL_LVDS_MIN            17
 209 #define G4X_M1_DUAL_CHANNEL_LVDS_MAX            23
 210 #define G4X_M2_DUAL_CHANNEL_LVDS_MIN            5
 211 #define G4X_M2_DUAL_CHANNEL_LVDS_MAX            11
 212 #define G4X_P_DUAL_CHANNEL_LVDS_MIN             14
 213 #define G4X_P_DUAL_CHANNEL_LVDS_MAX             42
 214 #define G4X_P1_DUAL_CHANNEL_LVDS_MIN            2
 215 #define G4X_P1_DUAL_CHANNEL_LVDS_MAX            6
 216 #define G4X_P2_DUAL_CHANNEL_LVDS_SLOW           7
 217 #define G4X_P2_DUAL_CHANNEL_LVDS_FAST           7
 218 #define G4X_P2_DUAL_CHANNEL_LVDS_LIMIT          0
 219
 220 /*The parameter is for DISPLAY PORT on G4x platform*/
 221 #define G4X_DOT_DISPLAY_PORT_MIN           161670
 222 #define G4X_DOT_DISPLAY_PORT_MAX           227000
 223 #define G4X_N_DISPLAY_PORT_MIN             1
 224 #define G4X_N_DISPLAY_PORT_MAX             2
 225 #define G4X_M_DISPLAY_PORT_MIN             97
 226 #define G4X_M_DISPLAY_PORT_MAX             108
 227 #define G4X_M1_DISPLAY_PORT_MIN            0x10
 228 #define G4X_M1_DISPLAY_PORT_MAX            0x12
 229 #define G4X_M2_DISPLAY_PORT_MIN            0x05
 230 #define G4X_M2_DISPLAY_PORT_MAX            0x06
 231 #define G4X_P_DISPLAY_PORT_MIN             10
 232 #define G4X_P_DISPLAY_PORT_MAX             20
 233 #define G4X_P1_DISPLAY_PORT_MIN            1
 234 #define G4X_P1_DISPLAY_PORT_MAX            2
 235 #define G4X_P2_DISPLAY_PORT_SLOW           10
 236 #define G4X_P2_DISPLAY_PORT_FAST           10
 237 #define G4X_P2_DISPLAY_PORT_LIMIT          0
 238
 239 /* Ironlake / Sandybridge */
 240 /* as we calculate clock using (register_value + 2) for
 241    N/M1/M2, so here the range value for them is (actual_value-2).
 242  */
 243 #define IRONLAKE_DOT_MIN         25000
 244 #define IRONLAKE_DOT_MAX         350000
 245 #define IRONLAKE_VCO_MIN         1760000
 246 #define IRONLAKE_VCO_MAX         3510000
 247 #define IRONLAKE_M1_MIN          12
 248 #define IRONLAKE_M1_MAX          22
 249 #define IRONLAKE_M2_MIN          5
 250 #define IRONLAKE_M2_MAX          9
 251 #define IRONLAKE_P2_DOT_LIMIT    225000 /* 225Mhz */
 252
 253 /* We have parameter ranges for different type of outputs. */
 254
 255 /* DAC & HDMI Refclk 120Mhz */
 256 #define IRONLAKE_DAC_N_MIN      1
 257 #define IRONLAKE_DAC_N_MAX      5
 258 #define IRONLAKE_DAC_M_MIN      79
 259 #define IRONLAKE_DAC_M_MAX      127
 260 #define IRONLAKE_DAC_P_MIN      5
 261 #define IRONLAKE_DAC_P_MAX      80
 262 #define IRONLAKE_DAC_P1_MIN     1
 263 #define IRONLAKE_DAC_P1_MAX     8
 264 #define IRONLAKE_DAC_P2_SLOW    10
 265 #define IRONLAKE_DAC_P2_FAST    5
 266
 267 /* LVDS single-channel 120Mhz refclk */
 268 #define IRONLAKE_LVDS_S_N_MIN   1
 269 #define IRONLAKE_LVDS_S_N_MAX   3
 270 #define IRONLAKE_LVDS_S_M_MIN   79
 271 #define IRONLAKE_LVDS_S_M_MAX   118
 272 #define IRONLAKE_LVDS_S_P_MIN   28
 273 #define IRONLAKE_LVDS_S_P_MAX   112
 274 #define IRONLAKE_LVDS_S_P1_MIN  2
 275 #define IRONLAKE_LVDS_S_P1_MAX  8
 276 #define IRONLAKE_LVDS_S_P2_SLOW 14
 277 #define IRONLAKE_LVDS_S_P2_FAST 14
 278
 279 /* LVDS dual-channel 120Mhz refclk */
 280 #define IRONLAKE_LVDS_D_N_MIN   1
 281 #define IRONLAKE_LVDS_D_N_MAX   3
 282 #define IRONLAKE_LVDS_D_M_MIN   79
 283 #define IRONLAKE_LVDS_D_M_MAX   127
 284 #define IRONLAKE_LVDS_D_P_MIN   14
 285 #define IRONLAKE_LVDS_D_P_MAX   56
 286 #define IRONLAKE_LVDS_D_P1_MIN  2
 287 #define IRONLAKE_LVDS_D_P1_MAX  8
 288 #define IRONLAKE_LVDS_D_P2_SLOW 7
 289 #define IRONLAKE_LVDS_D_P2_FAST 7
 290
 291 /* LVDS single-channel 100Mhz refclk */
 292 #define IRONLAKE_LVDS_S_SSC_N_MIN       1
 293 #define IRONLAKE_LVDS_S_SSC_N_MAX       2
 294 #define IRONLAKE_LVDS_S_SSC_M_MIN       79
 295 #define IRONLAKE_LVDS_S_SSC_M_MAX       126
 296 #define IRONLAKE_LVDS_S_SSC_P_MIN       28
 297 #define IRONLAKE_LVDS_S_SSC_P_MAX       112
 298 #define IRONLAKE_LVDS_S_SSC_P1_MIN      2
 299 #define IRONLAKE_LVDS_S_SSC_P1_MAX      8
 300 #define IRONLAKE_LVDS_S_SSC_P2_SLOW     14
 301 #define IRONLAKE_LVDS_S_SSC_P2_FAST     14
 302
 303 /* LVDS dual-channel 100Mhz refclk */
 304 #define IRONLAKE_LVDS_D_SSC_N_MIN       1
 305 #define IRONLAKE_LVDS_D_SSC_N_MAX       3
 306 #define IRONLAKE_LVDS_D_SSC_M_MIN       79
 307 #define IRONLAKE_LVDS_D_SSC_M_MAX       126
 308 #define IRONLAKE_LVDS_D_SSC_P_MIN       14
 309 #define IRONLAKE_LVDS_D_SSC_P_MAX       42
 310 #define IRONLAKE_LVDS_D_SSC_P1_MIN      2
 311 #define IRONLAKE_LVDS_D_SSC_P1_MAX      6
 312 #define IRONLAKE_LVDS_D_SSC_P2_SLOW     7
 313 #define IRONLAKE_LVDS_D_SSC_P2_FAST     7
 314
 315 /* DisplayPort */
 316 #define IRONLAKE_DP_N_MIN               1
 317 #define IRONLAKE_DP_N_MAX               2
 318 #define IRONLAKE_DP_M_MIN               81
 319 #define IRONLAKE_DP_M_MAX               90
 320 #define IRONLAKE_DP_P_MIN               10
 321 #define IRONLAKE_DP_P_MAX               20
 322 #define IRONLAKE_DP_P2_FAST             10
 323 #define IRONLAKE_DP_P2_SLOW             10
 324 #define IRONLAKE_DP_P2_LIMIT            0
 325 #define IRONLAKE_DP_P1_MIN              1
 326 #define IRONLAKE_DP_P1_MAX              2
 327
 328 /* FDI */
 329 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
 330
 331 static bool
 332 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 333                     int target, int refclk, intel_clock_t *best_clock);
 334 static bool
 335 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 336                         int target, int refclk, intel_clock_t *best_clock);
 337
 338 static bool
 339 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
 340                       int target, int refclk, intel_clock_t *best_clock);
 341 static bool
 342 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
 343                            int target, int refclk, intel_clock_t *best_clock);
 344
 345 static inline u32 /* units of 100MHz */
 346 intel_fdi_link_freq(struct drm_device *dev)
 347 {
 348         if (IS_GEN5(dev)) {
 349                 struct drm_i915_private *dev_priv = dev->dev_private;
 350                 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
 351         } else
 352                 return 27;
 353 }
 354
 355 static const intel_limit_t intel_limits_i8xx_dvo = {
 356         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
 357         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
 358         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
 359         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
 360         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
 361         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
 362         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
 363         .p1  = { .min = I8XX_P1_MIN,            .max = I8XX_P1_MAX },
 364         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
 365                  .p2_slow = I8XX_P2_SLOW,       .p2_fast = I8XX_P2_FAST },
 366         .find_pll = intel_find_best_PLL,
 367 };
 368
 369 static const intel_limit_t intel_limits_i8xx_lvds = {
 370         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
 371         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
 372         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
 373         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
 374         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
 375         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
 376         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
 377         .p1  = { .min = I8XX_P1_LVDS_MIN,       .max = I8XX_P1_LVDS_MAX },
 378         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
 379                  .p2_slow = I8XX_P2_LVDS_SLOW,  .p2_fast = I8XX_P2_LVDS_FAST },
 380         .find_pll = intel_find_best_PLL,
 381 };
 382
 383 static const intel_limit_t intel_limits_i9xx_sdvo = {
 384         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 385         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
 386         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
 387         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
 388         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
 389         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
 390         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
 391         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 392         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
 393                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
 394         .find_pll = intel_find_best_PLL,
 395 };
 396
 397 static const intel_limit_t intel_limits_i9xx_lvds = {
 398         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 399         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
 400         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
 401         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
 402         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
 403         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
 404         .p   = { .min = I9XX_P_LVDS_MIN,        .max = I9XX_P_LVDS_MAX },
 405         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 406         /* The single-channel range is 25-112Mhz, and dual-channel
 407          * is 80-224Mhz.  Prefer single channel as much as possible.
 408          */
 409         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
 410                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_FAST },
 411         .find_pll = intel_find_best_PLL,
 412 };
 413
 414     /* below parameter and function is for G4X Chipset Family*/
 415 static const intel_limit_t intel_limits_g4x_sdvo = {
 416         .dot = { .min = G4X_DOT_SDVO_MIN,       .max = G4X_DOT_SDVO_MAX },
 417         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
 418         .n   = { .min = G4X_N_SDVO_MIN,         .max = G4X_N_SDVO_MAX },
 419         .m   = { .min = G4X_M_SDVO_MIN,         .max = G4X_M_SDVO_MAX },
 420         .m1  = { .min = G4X_M1_SDVO_MIN,        .max = G4X_M1_SDVO_MAX },
 421         .m2  = { .min = G4X_M2_SDVO_MIN,        .max = G4X_M2_SDVO_MAX },
 422         .p   = { .min = G4X_P_SDVO_MIN,         .max = G4X_P_SDVO_MAX },
 423         .p1  = { .min = G4X_P1_SDVO_MIN,        .max = G4X_P1_SDVO_MAX},
 424         .p2  = { .dot_limit = G4X_P2_SDVO_LIMIT,
 425                  .p2_slow = G4X_P2_SDVO_SLOW,
 426                  .p2_fast = G4X_P2_SDVO_FAST
 427         },
 428         .find_pll = intel_g4x_find_best_PLL,
 429 };
 430
 431 static const intel_limit_t intel_limits_g4x_hdmi = {
 432         .dot = { .min = G4X_DOT_HDMI_DAC_MIN,   .max = G4X_DOT_HDMI_DAC_MAX },
 433         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
 434         .n   = { .min = G4X_N_HDMI_DAC_MIN,     .max = G4X_N_HDMI_DAC_MAX },
 435         .m   = { .min = G4X_M_HDMI_DAC_MIN,     .max = G4X_M_HDMI_DAC_MAX },
 436         .m1  = { .min = G4X_M1_HDMI_DAC_MIN,    .max = G4X_M1_HDMI_DAC_MAX },
 437         .m2  = { .min = G4X_M2_HDMI_DAC_MIN,    .max = G4X_M2_HDMI_DAC_MAX },
 438         .p   = { .min = G4X_P_HDMI_DAC_MIN,     .max = G4X_P_HDMI_DAC_MAX },
 439         .p1  = { .min = G4X_P1_HDMI_DAC_MIN,    .max = G4X_P1_HDMI_DAC_MAX},
 440         .p2  = { .dot_limit = G4X_P2_HDMI_DAC_LIMIT,
 441                  .p2_slow = G4X_P2_HDMI_DAC_SLOW,
 442                  .p2_fast = G4X_P2_HDMI_DAC_FAST
 443         },
 444         .find_pll = intel_g4x_find_best_PLL,
 445 };
 446
 447 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
 448         .dot = { .min = G4X_DOT_SINGLE_CHANNEL_LVDS_MIN,
 449                  .max = G4X_DOT_SINGLE_CHANNEL_LVDS_MAX },
 450         .vco = { .min = G4X_VCO_MIN,
 451                  .max = G4X_VCO_MAX },
 452         .n   = { .min = G4X_N_SINGLE_CHANNEL_LVDS_MIN,
 453                  .max = G4X_N_SINGLE_CHANNEL_LVDS_MAX },
 454         .m   = { .min = G4X_M_SINGLE_CHANNEL_LVDS_MIN,
 455                  .max = G4X_M_SINGLE_CHANNEL_LVDS_MAX },
 456         .m1  = { .min = G4X_M1_SINGLE_CHANNEL_LVDS_MIN,
 457                  .max = G4X_M1_SINGLE_CHANNEL_LVDS_MAX },
 458         .m2  = { .min = G4X_M2_SINGLE_CHANNEL_LVDS_MIN,
 459                  .max = G4X_M2_SINGLE_CHANNEL_LVDS_MAX },
 460         .p   = { .min = G4X_P_SINGLE_CHANNEL_LVDS_MIN,
 461                  .max = G4X_P_SINGLE_CHANNEL_LVDS_MAX },
 462         .p1  = { .min = G4X_P1_SINGLE_CHANNEL_LVDS_MIN,
 463                  .max = G4X_P1_SINGLE_CHANNEL_LVDS_MAX },
 464         .p2  = { .dot_limit = G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT,
 465                  .p2_slow = G4X_P2_SINGLE_CHANNEL_LVDS_SLOW,
 466                  .p2_fast = G4X_P2_SINGLE_CHANNEL_LVDS_FAST
 467         },
 468         .find_pll = intel_g4x_find_best_PLL,
 469 };
 470
 471 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
 472         .dot = { .min = G4X_DOT_DUAL_CHANNEL_LVDS_MIN,
 473                  .max = G4X_DOT_DUAL_CHANNEL_LVDS_MAX },
 474         .vco = { .min = G4X_VCO_MIN,
 475                  .max = G4X_VCO_MAX },
 476         .n   = { .min = G4X_N_DUAL_CHANNEL_LVDS_MIN,
 477                  .max = G4X_N_DUAL_CHANNEL_LVDS_MAX },
 478         .m   = { .min = G4X_M_DUAL_CHANNEL_LVDS_MIN,
 479                  .max = G4X_M_DUAL_CHANNEL_LVDS_MAX },
 480         .m1  = { .min = G4X_M1_DUAL_CHANNEL_LVDS_MIN,
 481                  .max = G4X_M1_DUAL_CHANNEL_LVDS_MAX },
 482         .m2  = { .min = G4X_M2_DUAL_CHANNEL_LVDS_MIN,
 483                  .max = G4X_M2_DUAL_CHANNEL_LVDS_MAX },
 484         .p   = { .min = G4X_P_DUAL_CHANNEL_LVDS_MIN,
 485                  .max = G4X_P_DUAL_CHANNEL_LVDS_MAX },
 486         .p1  = { .min = G4X_P1_DUAL_CHANNEL_LVDS_MIN,
 487                  .max = G4X_P1_DUAL_CHANNEL_LVDS_MAX },
 488         .p2  = { .dot_limit = G4X_P2_DUAL_CHANNEL_LVDS_LIMIT,
 489                  .p2_slow = G4X_P2_DUAL_CHANNEL_LVDS_SLOW,
 490                  .p2_fast = G4X_P2_DUAL_CHANNEL_LVDS_FAST
 491         },
 492         .find_pll = intel_g4x_find_best_PLL,
 493 };
 494
 495 static const intel_limit_t intel_limits_g4x_display_port = {
 496         .dot = { .min = G4X_DOT_DISPLAY_PORT_MIN,
 497                  .max = G4X_DOT_DISPLAY_PORT_MAX },
 498         .vco = { .min = G4X_VCO_MIN,
 499                  .max = G4X_VCO_MAX},
 500         .n   = { .min = G4X_N_DISPLAY_PORT_MIN,
 501                  .max = G4X_N_DISPLAY_PORT_MAX },
 502         .m   = { .min = G4X_M_DISPLAY_PORT_MIN,
 503                  .max = G4X_M_DISPLAY_PORT_MAX },
 504         .m1  = { .min = G4X_M1_DISPLAY_PORT_MIN,
 505                  .max = G4X_M1_DISPLAY_PORT_MAX },
 506         .m2  = { .min = G4X_M2_DISPLAY_PORT_MIN,
 507                  .max = G4X_M2_DISPLAY_PORT_MAX },
 508         .p   = { .min = G4X_P_DISPLAY_PORT_MIN,
 509                  .max = G4X_P_DISPLAY_PORT_MAX },
 510         .p1  = { .min = G4X_P1_DISPLAY_PORT_MIN,
 511                  .max = G4X_P1_DISPLAY_PORT_MAX},
 512         .p2  = { .dot_limit = G4X_P2_DISPLAY_PORT_LIMIT,
 513                  .p2_slow = G4X_P2_DISPLAY_PORT_SLOW,
 514                  .p2_fast = G4X_P2_DISPLAY_PORT_FAST },
 515         .find_pll = intel_find_pll_g4x_dp,
 516 };
 517
 518 static const intel_limit_t intel_limits_pineview_sdvo = {
 519         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX},
 520         .vco = { .min = PINEVIEW_VCO_MIN,               .max = PINEVIEW_VCO_MAX },
 521         .n   = { .min = PINEVIEW_N_MIN,         .max = PINEVIEW_N_MAX },
 522         .m   = { .min = PINEVIEW_M_MIN,         .max = PINEVIEW_M_MAX },
 523         .m1  = { .min = PINEVIEW_M1_MIN,                .max = PINEVIEW_M1_MAX },
 524         .m2  = { .min = PINEVIEW_M2_MIN,                .max = PINEVIEW_M2_MAX },
 525         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
 526         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 527         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
 528                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
 529         .find_pll = intel_find_best_PLL,
 530 };
 531
 532 static const intel_limit_t intel_limits_pineview_lvds = {
 533         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
 534         .vco = { .min = PINEVIEW_VCO_MIN,               .max = PINEVIEW_VCO_MAX },
 535         .n   = { .min = PINEVIEW_N_MIN,         .max = PINEVIEW_N_MAX },
 536         .m   = { .min = PINEVIEW_M_MIN,         .max = PINEVIEW_M_MAX },
 537         .m1  = { .min = PINEVIEW_M1_MIN,                .max = PINEVIEW_M1_MAX },
 538         .m2  = { .min = PINEVIEW_M2_MIN,                .max = PINEVIEW_M2_MAX },
 539         .p   = { .min = PINEVIEW_P_LVDS_MIN,    .max = PINEVIEW_P_LVDS_MAX },
 540         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
 541         /* Pineview only supports single-channel mode. */
 542         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
 543                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_SLOW },
 544         .find_pll = intel_find_best_PLL,
 545 };
 546
 547 static const intel_limit_t intel_limits_ironlake_dac = {
 548         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 549         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 550         .n   = { .min = IRONLAKE_DAC_N_MIN,        .max = IRONLAKE_DAC_N_MAX },
 551         .m   = { .min = IRONLAKE_DAC_M_MIN,        .max = IRONLAKE_DAC_M_MAX },
 552         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 553         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 554         .p   = { .min = IRONLAKE_DAC_P_MIN,        .max = IRONLAKE_DAC_P_MAX },
 555         .p1  = { .min = IRONLAKE_DAC_P1_MIN,       .max = IRONLAKE_DAC_P1_MAX },
 556         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 557                  .p2_slow = IRONLAKE_DAC_P2_SLOW,
 558                  .p2_fast = IRONLAKE_DAC_P2_FAST },
 559         .find_pll = intel_g4x_find_best_PLL,
 560 };
 561
 562 static const intel_limit_t intel_limits_ironlake_single_lvds = {
 563         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 564         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 565         .n   = { .min = IRONLAKE_LVDS_S_N_MIN,     .max = IRONLAKE_LVDS_S_N_MAX },
 566         .m   = { .min = IRONLAKE_LVDS_S_M_MIN,     .max = IRONLAKE_LVDS_S_M_MAX },
 567         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 568         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 569         .p   = { .min = IRONLAKE_LVDS_S_P_MIN,     .max = IRONLAKE_LVDS_S_P_MAX },
 570         .p1  = { .min = IRONLAKE_LVDS_S_P1_MIN,    .max = IRONLAKE_LVDS_S_P1_MAX },
 571         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 572                  .p2_slow = IRONLAKE_LVDS_S_P2_SLOW,
 573                  .p2_fast = IRONLAKE_LVDS_S_P2_FAST },
 574         .find_pll = intel_g4x_find_best_PLL,
 575 };
 576
 577 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
 578         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 579         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 580         .n   = { .min = IRONLAKE_LVDS_D_N_MIN,     .max = IRONLAKE_LVDS_D_N_MAX },
 581         .m   = { .min = IRONLAKE_LVDS_D_M_MIN,     .max = IRONLAKE_LVDS_D_M_MAX },
 582         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 583         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 584         .p   = { .min = IRONLAKE_LVDS_D_P_MIN,     .max = IRONLAKE_LVDS_D_P_MAX },
 585         .p1  = { .min = IRONLAKE_LVDS_D_P1_MIN,    .max = IRONLAKE_LVDS_D_P1_MAX },
 586         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 587                  .p2_slow = IRONLAKE_LVDS_D_P2_SLOW,
 588                  .p2_fast = IRONLAKE_LVDS_D_P2_FAST },
 589         .find_pll = intel_g4x_find_best_PLL,
 590 };
 591
 592 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
 593         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 594         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 595         .n   = { .min = IRONLAKE_LVDS_S_SSC_N_MIN, .max = IRONLAKE_LVDS_S_SSC_N_MAX },
 596         .m   = { .min = IRONLAKE_LVDS_S_SSC_M_MIN, .max = IRONLAKE_LVDS_S_SSC_M_MAX },
 597         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 598         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 599         .p   = { .min = IRONLAKE_LVDS_S_SSC_P_MIN, .max = IRONLAKE_LVDS_S_SSC_P_MAX },
 600         .p1  = { .min = IRONLAKE_LVDS_S_SSC_P1_MIN,.max = IRONLAKE_LVDS_S_SSC_P1_MAX },
 601         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 602                  .p2_slow = IRONLAKE_LVDS_S_SSC_P2_SLOW,
 603                  .p2_fast = IRONLAKE_LVDS_S_SSC_P2_FAST },
 604         .find_pll = intel_g4x_find_best_PLL,
 605 };
 606
 607 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
 608         .dot = { .min = IRONLAKE_DOT_MIN,          .max = IRONLAKE_DOT_MAX },
 609         .vco = { .min = IRONLAKE_VCO_MIN,          .max = IRONLAKE_VCO_MAX },
 610         .n   = { .min = IRONLAKE_LVDS_D_SSC_N_MIN, .max = IRONLAKE_LVDS_D_SSC_N_MAX },
 611         .m   = { .min = IRONLAKE_LVDS_D_SSC_M_MIN, .max = IRONLAKE_LVDS_D_SSC_M_MAX },
 612         .m1  = { .min = IRONLAKE_M1_MIN,           .max = IRONLAKE_M1_MAX },
 613         .m2  = { .min = IRONLAKE_M2_MIN,           .max = IRONLAKE_M2_MAX },
 614         .p   = { .min = IRONLAKE_LVDS_D_SSC_P_MIN, .max = IRONLAKE_LVDS_D_SSC_P_MAX },
 615         .p1  = { .min = IRONLAKE_LVDS_D_SSC_P1_MIN,.max = IRONLAKE_LVDS_D_SSC_P1_MAX },
 616         .p2  = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
 617                  .p2_slow = IRONLAKE_LVDS_D_SSC_P2_SLOW,
 618                  .p2_fast = IRONLAKE_LVDS_D_SSC_P2_FAST },
 619         .find_pll = intel_g4x_find_best_PLL,
 620 };
 621
 622 static const intel_limit_t intel_limits_ironlake_display_port = {
 623         .dot = { .min = IRONLAKE_DOT_MIN,
 624                  .max = IRONLAKE_DOT_MAX },
 625         .vco = { .min = IRONLAKE_VCO_MIN,
 626                  .max = IRONLAKE_VCO_MAX},
 627         .n   = { .min = IRONLAKE_DP_N_MIN,
 628                  .max = IRONLAKE_DP_N_MAX },
 629         .m   = { .min = IRONLAKE_DP_M_MIN,
 630                  .max = IRONLAKE_DP_M_MAX },
 631         .m1  = { .min = IRONLAKE_M1_MIN,
 632                  .max = IRONLAKE_M1_MAX },
 633         .m2  = { .min = IRONLAKE_M2_MIN,
 634                  .max = IRONLAKE_M2_MAX },
 635         .p   = { .min = IRONLAKE_DP_P_MIN,
 636                  .max = IRONLAKE_DP_P_MAX },
 637         .p1  = { .min = IRONLAKE_DP_P1_MIN,
 638                  .max = IRONLAKE_DP_P1_MAX},
 639         .p2  = { .dot_limit = IRONLAKE_DP_P2_LIMIT,
 640                  .p2_slow = IRONLAKE_DP_P2_SLOW,
 641                  .p2_fast = IRONLAKE_DP_P2_FAST },
 642         .find_pll = intel_find_pll_ironlake_dp,
 643 };
 644
 645 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
 646                                                 int refclk)
 647 {
 648         struct drm_device *dev = crtc->dev;
 649         struct drm_i915_private *dev_priv = dev->dev_private;
 650         const intel_limit_t *limit;
 651
 652         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 653                 if ((I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) ==
 654                     LVDS_CLKB_POWER_UP) {
 655                         /* LVDS dual channel */
 656                         if (refclk == 100000)
 657                                 limit = &intel_limits_ironlake_dual_lvds_100m;
 658                         else
 659                                 limit = &intel_limits_ironlake_dual_lvds;
 660                 } else {
 661                         if (refclk == 100000)
 662                                 limit = &intel_limits_ironlake_single_lvds_100m;
 663                         else
 664                                 limit = &intel_limits_ironlake_single_lvds;
 665                 }
 666         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
 667                         HAS_eDP)
 668                 limit = &intel_limits_ironlake_display_port;
 669         else
 670                 limit = &intel_limits_ironlake_dac;
 671
 672         return limit;
 673 }
 674
 675 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
 676 {
 677         struct drm_device *dev = crtc->dev;
 678         struct drm_i915_private *dev_priv = dev->dev_private;
 679         const intel_limit_t *limit;
 680
 681         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 682                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 683                     LVDS_CLKB_POWER_UP)
 684                         /* LVDS with dual channel */
 685                         limit = &intel_limits_g4x_dual_channel_lvds;
 686                 else
 687                         /* LVDS with dual channel */
 688                         limit = &intel_limits_g4x_single_channel_lvds;
 689         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
 690                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
 691                 limit = &intel_limits_g4x_hdmi;
 692         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 693                 limit = &intel_limits_g4x_sdvo;
 694         } else if (intel_pipe_has_type (crtc, INTEL_OUTPUT_DISPLAYPORT)) {
 695                 limit = &intel_limits_g4x_display_port;
 696         } else /* The option is for other outputs */
 697                 limit = &intel_limits_i9xx_sdvo;
 698
 699         return limit;
 700 }
 701
 702 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
 703 {
 704         struct drm_device *dev = crtc->dev;
 705         const intel_limit_t *limit;
 706
 707         if (HAS_PCH_SPLIT(dev))
 708                 limit = intel_ironlake_limit(crtc, refclk);
 709         else if (IS_G4X(dev)) {
 710                 limit = intel_g4x_limit(crtc);
 711         } else if (IS_PINEVIEW(dev)) {
 712                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 713                         limit = &intel_limits_pineview_lvds;
 714                 else
 715                         limit = &intel_limits_pineview_sdvo;
 716         } else if (!IS_GEN2(dev)) {
 717                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 718                         limit = &intel_limits_i9xx_lvds;
 719                 else
 720                         limit = &intel_limits_i9xx_sdvo;
 721         } else {
 722                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 723                         limit = &intel_limits_i8xx_lvds;
 724                 else
 725                         limit = &intel_limits_i8xx_dvo;
 726         }
 727         return limit;
 728 }
 729
 730 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 731 static void pineview_clock(int refclk, intel_clock_t *clock)
 732 {
 733         clock->m = clock->m2 + 2;
 734         clock->p = clock->p1 * clock->p2;
 735         clock->vco = refclk * clock->m / clock->n;
 736         clock->dot = clock->vco / clock->p;
 737 }
 738
 739 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
 740 {
 741         if (IS_PINEVIEW(dev)) {
 742                 pineview_clock(refclk, clock);
 743                 return;
 744         }
 745         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
 746         clock->p = clock->p1 * clock->p2;
 747         clock->vco = refclk * clock->m / (clock->n + 2);
 748         clock->dot = clock->vco / clock->p;
 749 }
 750
 751 /**
 752  * Returns whether any output on the specified pipe is of the specified type
 753  */
 754 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 755 {
 756         struct drm_device *dev = crtc->dev;
 757         struct drm_mode_config *mode_config = &dev->mode_config;
 758         struct intel_encoder *encoder;
 759
 760         list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
 761                 if (encoder->base.crtc == crtc && encoder->type == type)
 762                         return true;
 763
 764         return false;
 765 }
 766
 767 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 768 /**
 769  * Returns whether the given set of divisors are valid for a given refclk with
 770  * the given connectors.
 771  */
 772
 773 static bool intel_PLL_is_valid(struct drm_device *dev,
 774                                const intel_limit_t *limit,
 775                                const intel_clock_t *clock)
 776 {
 777         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 778                 INTELPllInvalid ("p1 out of range\n");
 779         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
 780                 INTELPllInvalid ("p out of range\n");
 781         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 782                 INTELPllInvalid ("m2 out of range\n");
 783         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 784                 INTELPllInvalid ("m1 out of range\n");
 785         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
 786                 INTELPllInvalid ("m1 <= m2\n");
 787         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
 788                 INTELPllInvalid ("m out of range\n");
 789         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 790                 INTELPllInvalid ("n out of range\n");
 791         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 792                 INTELPllInvalid ("vco out of range\n");
 793         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 794          * connector, etc., rather than just a single range.
 795          */
 796         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 797                 INTELPllInvalid ("dot out of range\n");
 798
 799         return true;
 800 }
 801
 802 static bool
 803 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 804                     int target, int refclk, intel_clock_t *best_clock)
 805
 806 {
 807         struct drm_device *dev = crtc->dev;
 808         struct drm_i915_private *dev_priv = dev->dev_private;
 809         intel_clock_t clock;
 810         int err = target;
 811
 812         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
 813             (I915_READ(LVDS)) != 0) {
 814                 /*
 815                  * For LVDS, if the panel is on, just rely on its current
 816                  * settings for dual-channel.  We haven't figured out how to
 817                  * reliably set up different single/dual channel state, if we
 818                  * even can.
 819                  */
 820                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 821                     LVDS_CLKB_POWER_UP)
 822                         clock.p2 = limit->p2.p2_fast;
 823                 else
 824                         clock.p2 = limit->p2.p2_slow;
 825         } else {
 826                 if (target < limit->p2.dot_limit)
 827                         clock.p2 = limit->p2.p2_slow;
 828                 else
 829                         clock.p2 = limit->p2.p2_fast;
 830         }
 831
 832         memset (best_clock, 0, sizeof (*best_clock));
 833
 834         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 835              clock.m1++) {
 836                 for (clock.m2 = limit->m2.min;
 837                      clock.m2 <= limit->m2.max; clock.m2++) {
 838                         /* m1 is always 0 in Pineview */
 839                         if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
 840                                 break;
 841                         for (clock.n = limit->n.min;
 842                              clock.n <= limit->n.max; clock.n++) {
 843                                 for (clock.p1 = limit->p1.min;
 844                                         clock.p1 <= limit->p1.max; clock.p1++) {
 845                                         int this_err;
 846
 847                                         intel_clock(dev, refclk, &clock);
 848                                         if (!intel_PLL_is_valid(dev, limit,
 849                                                                 &clock))
 850                                                 continue;
 851
 852                                         this_err = abs(clock.dot - target);
 853                                         if (this_err < err) {
 854                                                 *best_clock = clock;
 855                                                 err = this_err;
 856                                         }
 857                                 }
 858                         }
 859                 }
 860         }
 861
 862         return (err != target);
 863 }
 864
 865 static bool
 866 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 867                         int target, int refclk, intel_clock_t *best_clock)
 868 {
 869         struct drm_device *dev = crtc->dev;
 870         struct drm_i915_private *dev_priv = dev->dev_private;
 871         intel_clock_t clock;
 872         int max_n;
 873         bool found;
 874         /* approximately equals target * 0.00585 */
 875         int err_most = (target >> 8) + (target >> 9);
 876         found = false;
 877
 878         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 879                 int lvds_reg;
 880
 881                 if (HAS_PCH_SPLIT(dev))
 882                         lvds_reg = PCH_LVDS;
 883                 else
 884                         lvds_reg = LVDS;
 885                 if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
 886                     LVDS_CLKB_POWER_UP)
 887                         clock.p2 = limit->p2.p2_fast;
 888                 else
 889                         clock.p2 = limit->p2.p2_slow;
 890         } else {
 891                 if (target < limit->p2.dot_limit)
 892                         clock.p2 = limit->p2.p2_slow;
 893                 else
 894                         clock.p2 = limit->p2.p2_fast;
 895         }
 896
 897         memset(best_clock, 0, sizeof(*best_clock));
 898         max_n = limit->n.max;
 899         /* based on hardware requirement, prefer smaller n to precision */
 900         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 901                 /* based on hardware requirement, prefere larger m1,m2 */
 902                 for (clock.m1 = limit->m1.max;
 903                      clock.m1 >= limit->m1.min; clock.m1--) {
 904                         for (clock.m2 = limit->m2.max;
 905                              clock.m2 >= limit->m2.min; clock.m2--) {
 906                                 for (clock.p1 = limit->p1.max;
 907                                      clock.p1 >= limit->p1.min; clock.p1--) {
 908                                         int this_err;
 909
 910                                         intel_clock(dev, refclk, &clock);
 911                                         if (!intel_PLL_is_valid(dev, limit,
 912                                                                 &clock))
 913                                                 continue;
 914
 915                                         this_err = abs(clock.dot - target);
 916                                         if (this_err < err_most) {
 917                                                 *best_clock = clock;
 918                                                 err_most = this_err;
 919                                                 max_n = clock.n;
 920                                                 found = true;
 921                                         }
 922                                 }
 923                         }
 924                 }
 925         }
 926         return found;
 927 }
 928
 929 static bool
 930 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 931                            int target, int refclk, intel_clock_t *best_clock)
 932 {
 933         struct drm_device *dev = crtc->dev;
 934         intel_clock_t clock;
 935
 936         if (target < 200000) {
 937                 clock.n = 1;
 938                 clock.p1 = 2;
 939                 clock.p2 = 10;
 940                 clock.m1 = 12;
 941                 clock.m2 = 9;
 942         } else {
 943                 clock.n = 2;
 944                 clock.p1 = 1;
 945                 clock.p2 = 10;
 946                 clock.m1 = 14;
 947                 clock.m2 = 8;
 948         }
 949         intel_clock(dev, refclk, &clock);
 950         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 951         return true;
 952 }
 953
 954 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
 955 static bool
 956 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 957                       int target, int refclk, intel_clock_t *best_clock)
 958 {
 959         intel_clock_t clock;
 960         if (target < 200000) {
 961                 clock.p1 = 2;
 962                 clock.p2 = 10;
 963                 clock.n = 2;
 964                 clock.m1 = 23;
 965                 clock.m2 = 8;
 966         } else {
 967                 clock.p1 = 1;
 968                 clock.p2 = 10;
 969                 clock.n = 1;
 970                 clock.m1 = 14;
 971                 clock.m2 = 2;
 972         }
 973         clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
 974         clock.p = (clock.p1 * clock.p2);
 975         clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
 976         clock.vco = 0;
 977         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 978         return true;
 979 }
 980
 981 /**
 982  * intel_wait_for_vblank - wait for vblank on a given pipe
 983  * @dev: drm device
 984  * @pipe: pipe to wait for
 985  *
 986  * Wait for vblank to occur on a given pipe.  Needed for various bits of
 987  * mode setting code.
 988  */
 989 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 990 {
 991         struct drm_i915_private *dev_priv = dev->dev_private;
 992         int pipestat_reg = (pipe == 0 ? PIPEASTAT : PIPEBSTAT);
 993
 994         /* Clear existing vblank status. Note this will clear any other
 995          * sticky status fields as well.
 996          *
 997          * This races with i915_driver_irq_handler() with the result
 998          * that either function could miss a vblank event.  Here it is not
 999          * fatal, as we will either wait upon the next vblank interrupt or
1000          * timeout.  Generally speaking intel_wait_for_vblank() is only
1001          * called during modeset at which time the GPU should be idle and
1002          * should *not* be performing page flips and thus not waiting on
1003          * vblanks...
1004          * Currently, the result of us stealing a vblank from the irq
1005          * handler is that a single frame will be skipped during swapbuffers.
1006          */
1007         I915_WRITE(pipestat_reg,
1008                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
1009
1010         /* Wait for vblank interrupt bit to set */
1011         if (wait_for(I915_READ(pipestat_reg) &
1012                      PIPE_VBLANK_INTERRUPT_STATUS,
1013                      50))
1014                 DRM_DEBUG_KMS("vblank wait timed out\n");
1015 }
1016
1017 /*
1018  * intel_wait_for_pipe_off - wait for pipe to turn off
1019  * @dev: drm device
1020  * @pipe: pipe to wait for
1021  *
1022  * After disabling a pipe, we can't wait for vblank in the usual way,
1023  * spinning on the vblank interrupt status bit, since we won't actually
1024  * see an interrupt when the pipe is disabled.
1025  *
1026  * On Gen4 and above:
1027  *   wait for the pipe register state bit to turn off
1028  *
1029  * Otherwise:
1030  *   wait for the display line value to settle (it usually
1031  *   ends up stopping at the start of the next frame).
1032  *
1033  */
1034 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
1035 {
1036         struct drm_i915_private *dev_priv = dev->dev_private;
1037
1038         if (INTEL_INFO(dev)->gen >= 4) {
1039                 int reg = PIPECONF(pipe);
1040
1041                 /* Wait for the Pipe State to go off */
1042                 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
1043                              100))
1044                         DRM_DEBUG_KMS("pipe_off wait timed out\n");
1045         } else {
1046                 u32 last_line;
1047                 int reg = PIPEDSL(pipe);
1048                 unsigned long timeout = jiffies + msecs_to_jiffies(100);
1049
1050                 /* Wait for the display line to settle */
1051                 do {
1052                         last_line = I915_READ(reg) & DSL_LINEMASK;
1053                         mdelay(5);
1054                 } while (((I915_READ(reg) & DSL_LINEMASK) != last_line) &&
1055                          time_after(timeout, jiffies));
1056                 if (time_after(jiffies, timeout))
1057                         DRM_DEBUG_KMS("pipe_off wait timed out\n");
1058         }
1059 }
1060
1061 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1062 {
1063         struct drm_device *dev = crtc->dev;
1064         struct drm_i915_private *dev_priv = dev->dev_private;
1065         struct drm_framebuffer *fb = crtc->fb;
1066         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1067         struct drm_i915_gem_object *obj = intel_fb->obj;
1068         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1069         int plane, i;
1070         u32 fbc_ctl, fbc_ctl2;
1071
1072         if (fb->pitch == dev_priv->cfb_pitch &&
1073             obj->fence_reg == dev_priv->cfb_fence &&
1074             intel_crtc->plane == dev_priv->cfb_plane &&
1075             I915_READ(FBC_CONTROL) & FBC_CTL_EN)
1076                 return;
1077
1078         i8xx_disable_fbc(dev);
1079
1080         dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;
1081
1082         if (fb->pitch < dev_priv->cfb_pitch)
1083                 dev_priv->cfb_pitch = fb->pitch;
1084
1085         /* FBC_CTL wants 64B units */
1086         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1087         dev_priv->cfb_fence = obj->fence_reg;
1088         dev_priv->cfb_plane = intel_crtc->plane;
1089         plane = dev_priv->cfb_plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
1090
1091         /* Clear old tags */
1092         for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
1093                 I915_WRITE(FBC_TAG + (i * 4), 0);
1094
1095         /* Set it up... */
1096         fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | plane;
1097         if (obj->tiling_mode != I915_TILING_NONE)
1098                 fbc_ctl2 |= FBC_CTL_CPU_FENCE;
1099         I915_WRITE(FBC_CONTROL2, fbc_ctl2);
1100         I915_WRITE(FBC_FENCE_OFF, crtc->y);
1101
1102         /* enable it... */
1103         fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
1104         if (IS_I945GM(dev))
1105                 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
1106         fbc_ctl |= (dev_priv->cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
1107         fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
1108         if (obj->tiling_mode != I915_TILING_NONE)
1109                 fbc_ctl |= dev_priv->cfb_fence;
1110         I915_WRITE(FBC_CONTROL, fbc_ctl);
1111
1112         DRM_DEBUG_KMS("enabled FBC, pitch %ld, yoff %d, plane %d, ",
1113                       dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane);
1114 }
1115
1116 void i8xx_disable_fbc(struct drm_device *dev)
1117 {
1118         struct drm_i915_private *dev_priv = dev->dev_private;
1119         u32 fbc_ctl;
1120
1121         /* Disable compression */
1122         fbc_ctl = I915_READ(FBC_CONTROL);
1123         if ((fbc_ctl & FBC_CTL_EN) == 0)
1124                 return;
1125
1126         fbc_ctl &= ~FBC_CTL_EN;
1127         I915_WRITE(FBC_CONTROL, fbc_ctl);
1128
1129         /* Wait for compressing bit to clear */
1130         if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
1131                 DRM_DEBUG_KMS("FBC idle timed out\n");
1132                 return;
1133         }
1134
1135         DRM_DEBUG_KMS("disabled FBC\n");
1136 }
1137
1138 static bool i8xx_fbc_enabled(struct drm_device *dev)
1139 {
1140         struct drm_i915_private *dev_priv = dev->dev_private;
1141
1142         return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
1143 }
1144
1145 static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1146 {
1147         struct drm_device *dev = crtc->dev;
1148         struct drm_i915_private *dev_priv = dev->dev_private;
1149         struct drm_framebuffer *fb = crtc->fb;
1150         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1151         struct drm_i915_gem_object *obj = intel_fb->obj;
1152         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1153         int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
1154         unsigned long stall_watermark = 200;
1155         u32 dpfc_ctl;
1156
1157         dpfc_ctl = I915_READ(DPFC_CONTROL);
1158         if (dpfc_ctl & DPFC_CTL_EN) {
1159                 if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 &&
1160                     dev_priv->cfb_fence == obj->fence_reg &&
1161                     dev_priv->cfb_plane == intel_crtc->plane &&
1162                     dev_priv->cfb_y == crtc->y)
1163                         return;
1164
1165                 I915_WRITE(DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN);
1166                 POSTING_READ(DPFC_CONTROL);
1167                 intel_wait_for_vblank(dev, intel_crtc->pipe);
1168         }
1169
1170         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1171         dev_priv->cfb_fence = obj->fence_reg;
1172         dev_priv->cfb_plane = intel_crtc->plane;
1173         dev_priv->cfb_y = crtc->y;
1174
1175         dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
1176         if (obj->tiling_mode != I915_TILING_NONE) {
1177                 dpfc_ctl |= DPFC_CTL_FENCE_EN | dev_priv->cfb_fence;
1178                 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
1179         } else {
1180                 I915_WRITE(DPFC_CHICKEN, ~DPFC_HT_MODIFY);
1181         }
1182
1183         I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1184                    (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1185                    (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1186         I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
1187
1188         /* enable it... */
1189         I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
1190
1191         DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1192 }
1193
1194 void g4x_disable_fbc(struct drm_device *dev)
1195 {
1196         struct drm_i915_private *dev_priv = dev->dev_private;
1197         u32 dpfc_ctl;
1198
1199         /* Disable compression */
1200         dpfc_ctl = I915_READ(DPFC_CONTROL);
1201         if (dpfc_ctl & DPFC_CTL_EN) {
1202                 dpfc_ctl &= ~DPFC_CTL_EN;
1203                 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
1204
1205                 DRM_DEBUG_KMS("disabled FBC\n");
1206         }
1207 }
1208
1209 static bool g4x_fbc_enabled(struct drm_device *dev)
1210 {
1211         struct drm_i915_private *dev_priv = dev->dev_private;
1212
1213         return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
1214 }
1215
1216 static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1217 {
1218         struct drm_device *dev = crtc->dev;
1219         struct drm_i915_private *dev_priv = dev->dev_private;
1220         struct drm_framebuffer *fb = crtc->fb;
1221         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1222         struct drm_i915_gem_object *obj = intel_fb->obj;
1223         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1224         int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
1225         unsigned long stall_watermark = 200;
1226         u32 dpfc_ctl;
1227
1228         dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1229         if (dpfc_ctl & DPFC_CTL_EN) {
1230                 if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 &&
1231                     dev_priv->cfb_fence == obj->fence_reg &&
1232                     dev_priv->cfb_plane == intel_crtc->plane &&
1233                     dev_priv->cfb_offset == obj->gtt_offset &&
1234                     dev_priv->cfb_y == crtc->y)
1235                         return;
1236
1237                 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN);
1238                 POSTING_READ(ILK_DPFC_CONTROL);
1239                 intel_wait_for_vblank(dev, intel_crtc->pipe);
1240         }
1241
1242         dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
1243         dev_priv->cfb_fence = obj->fence_reg;
1244         dev_priv->cfb_plane = intel_crtc->plane;
1245         dev_priv->cfb_offset = obj->gtt_offset;
1246         dev_priv->cfb_y = crtc->y;
1247
1248         dpfc_ctl &= DPFC_RESERVED;
1249         dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
1250         if (obj->tiling_mode != I915_TILING_NONE) {
1251                 dpfc_ctl |= (DPFC_CTL_FENCE_EN | dev_priv->cfb_fence);
1252                 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
1253         } else {
1254                 I915_WRITE(ILK_DPFC_CHICKEN, ~DPFC_HT_MODIFY);
1255         }
1256
1257         I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1258                    (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1259                    (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1260         I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
1261         I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID);
1262         /* enable it... */
1263         I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
1264
1265         if (IS_GEN6(dev)) {
1266                 I915_WRITE(SNB_DPFC_CTL_SA,
1267                            SNB_CPU_FENCE_ENABLE | dev_priv->cfb_fence);
1268                 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
1269         }
1270
1271         DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1272 }
1273
1274 void ironlake_disable_fbc(struct drm_device *dev)
1275 {
1276         struct drm_i915_private *dev_priv = dev->dev_private;
1277         u32 dpfc_ctl;
1278
1279         /* Disable compression */
1280         dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1281         if (dpfc_ctl & DPFC_CTL_EN) {
1282                 dpfc_ctl &= ~DPFC_CTL_EN;
1283                 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
1284
1285                 DRM_DEBUG_KMS("disabled FBC\n");
1286         }
1287 }
1288
1289 static bool ironlake_fbc_enabled(struct drm_device *dev)
1290 {
1291         struct drm_i915_private *dev_priv = dev->dev_private;
1292
1293         return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
1294 }
1295
1296 bool intel_fbc_enabled(struct drm_device *dev)
1297 {
1298         struct drm_i915_private *dev_priv = dev->dev_private;
1299
1300         if (!dev_priv->display.fbc_enabled)
1301                 return false;
1302
1303         return dev_priv->display.fbc_enabled(dev);
1304 }
1305
1306 void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1307 {
1308         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1309
1310         if (!dev_priv->display.enable_fbc)
1311                 return;
1312
1313         dev_priv->display.enable_fbc(crtc, interval);
1314 }
1315
1316 void intel_disable_fbc(struct drm_device *dev)
1317 {
1318         struct drm_i915_private *dev_priv = dev->dev_private;
1319
1320         if (!dev_priv->display.disable_fbc)
1321                 return;
1322
1323         dev_priv->display.disable_fbc(dev);
1324 }
1325
1326 /**
1327  * intel_update_fbc - enable/disable FBC as needed
1328  * @dev: the drm_device
1329  *
1330  * Set up the framebuffer compression hardware at mode set time.  We
1331  * enable it if possible:
1332  *   - plane A only (on pre-965)
1333  *   - no pixel mulitply/line duplication
1334  *   - no alpha buffer discard
1335  *   - no dual wide
1336  *   - framebuffer <= 2048 in width, 1536 in height
1337  *
1338  * We can't assume that any compression will take place (worst case),
1339  * so the compressed buffer has to be the same size as the uncompressed
1340  * one.  It also must reside (along with the line length buffer) in
1341  * stolen memory.
1342  *
1343  * We need to enable/disable FBC on a global basis.
1344  */
1345 static void intel_update_fbc(struct drm_device *dev)
1346 {
1347         struct drm_i915_private *dev_priv = dev->dev_private;
1348         struct drm_crtc *crtc = NULL, *tmp_crtc;
1349         struct intel_crtc *intel_crtc;
1350         struct drm_framebuffer *fb;
1351         struct intel_framebuffer *intel_fb;
1352         struct drm_i915_gem_object *obj;
1353
1354         DRM_DEBUG_KMS("\n");
1355
1356         if (!i915_powersave)
1357                 return;
1358
1359         if (!I915_HAS_FBC(dev))
1360                 return;
1361
1362         /*
1363          * If FBC is already on, we just have to verify that we can
1364          * keep it that way...
1365          * Need to disable if:
1366          *   - more than one pipe is active
1367          *   - changing FBC params (stride, fence, mode)
1368          *   - new fb is too large to fit in compressed buffer
1369          *   - going to an unsupported config (interlace, pixel multiply, etc.)
1370          */
1371         list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
1372                 if (tmp_crtc->enabled) {
1373                         if (crtc) {
1374                                 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
1375                                 dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES;
1376                                 goto out_disable;
1377                         }
1378                         crtc = tmp_crtc;
1379                 }
1380         }
1381
1382         if (!crtc || crtc->fb == NULL) {
1383                 DRM_DEBUG_KMS("no output, disabling\n");
1384                 dev_priv->no_fbc_reason = FBC_NO_OUTPUT;
1385                 goto out_disable;
1386         }
1387
1388         intel_crtc = to_intel_crtc(crtc);
1389         fb = crtc->fb;
1390         intel_fb = to_intel_framebuffer(fb);
1391         obj = intel_fb->obj;
1392
1393         if (intel_fb->obj->base.size > dev_priv->cfb_size) {
1394                 DRM_DEBUG_KMS("framebuffer too large, disabling "
1395                               "compression\n");
1396                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1397                 goto out_disable;
1398         }
1399         if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) ||
1400             (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) {
1401                 DRM_DEBUG_KMS("mode incompatible with compression, "
1402                               "disabling\n");
1403                 dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
1404                 goto out_disable;
1405         }
1406         if ((crtc->mode.hdisplay > 2048) ||
1407             (crtc->mode.vdisplay > 1536)) {
1408                 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
1409                 dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
1410                 goto out_disable;
1411         }
1412         if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) {
1413                 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
1414                 dev_priv->no_fbc_reason = FBC_BAD_PLANE;
1415                 goto out_disable;
1416         }
1417         if (obj->tiling_mode != I915_TILING_X) {
1418                 DRM_DEBUG_KMS("framebuffer not tiled, disabling compression\n");
1419                 dev_priv->no_fbc_reason = FBC_NOT_TILED;
1420                 goto out_disable;
1421         }
1422
1423         /* If the kernel debugger is active, always disable compression */
1424         if (in_dbg_master())
1425                 goto out_disable;
1426
1427         intel_enable_fbc(crtc, 500);
1428         return;
1429
1430 out_disable:
1431         /* Multiple disables should be harmless */
1432         if (intel_fbc_enabled(dev)) {
1433                 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
1434                 intel_disable_fbc(dev);
1435         }
1436 }
1437
1438 int
1439 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1440                            struct drm_i915_gem_object *obj,
1441                            struct intel_ring_buffer *pipelined)
1442 {
1443         u32 alignment;
1444         int ret;
1445
1446         switch (obj->tiling_mode) {
1447         case I915_TILING_NONE:
1448                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1449                         alignment = 128 * 1024;
1450                 else if (INTEL_INFO(dev)->gen >= 4)
1451                         alignment = 4 * 1024;
1452                 else
1453                         alignment = 64 * 1024;
1454                 break;
1455         case I915_TILING_X:
1456                 /* pin() will align the object as required by fence */
1457                 alignment = 0;
1458                 break;
1459         case I915_TILING_Y:
1460                 /* FIXME: Is this true? */
1461                 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
1462                 return -EINVAL;
1463         default:
1464                 BUG();
1465         }
1466
1467         ret = i915_gem_object_pin(obj, alignment, true);
1468         if (ret)
1469                 return ret;
1470
1471         ret = i915_gem_object_set_to_display_plane(obj, pipelined);
1472         if (ret)
1473                 goto err_unpin;
1474
1475         /* Install a fence for tiled scan-out. Pre-i965 always needs a
1476          * fence, whereas 965+ only requires a fence if using
1477          * framebuffer compression.  For simplicity, we always install
1478          * a fence as the cost is not that onerous.
1479          */
1480         if (obj->tiling_mode != I915_TILING_NONE) {
1481                 ret = i915_gem_object_get_fence(obj, pipelined, false);
1482                 if (ret)
1483                         goto err_unpin;
1484         }
1485
1486         return 0;
1487
1488 err_unpin:
1489         i915_gem_object_unpin(obj);
1490         return ret;
1491 }
1492
1493 /* Assume fb object is pinned & idle & fenced and just update base pointers */
1494 static int
1495 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
1496                            int x, int y, enum mode_set_atomic state)
1497 {
1498         struct drm_device *dev = crtc->dev;
1499         struct drm_i915_private *dev_priv = dev->dev_private;
1500         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1501         struct intel_framebuffer *intel_fb;
1502         struct drm_i915_gem_object *obj;
1503         int plane = intel_crtc->plane;
1504         unsigned long Start, Offset;
1505         u32 dspcntr;
1506         u32 reg;
1507
1508         switch (plane) {
1509         case 0:
1510         case 1:
1511                 break;
1512         default:
1513                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
1514                 return -EINVAL;
1515         }
1516
1517         intel_fb = to_intel_framebuffer(fb);
1518         obj = intel_fb->obj;
1519
1520         reg = DSPCNTR(plane);
1521         dspcntr = I915_READ(reg);
1522         /* Mask out pixel format bits in case we change it */
1523         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
1524         switch (fb->bits_per_pixel) {
1525         case 8:
1526                 dspcntr |= DISPPLANE_8BPP;
1527                 break;
1528         case 16:
1529                 if (fb->depth == 15)
1530                         dspcntr |= DISPPLANE_15_16BPP;
1531                 else
1532                         dspcntr |= DISPPLANE_16BPP;
1533                 break;
1534         case 24:
1535         case 32:
1536                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
1537                 break;
1538         default:
1539                 DRM_ERROR("Unknown color depth\n");
1540                 return -EINVAL;
1541         }
1542         if (INTEL_INFO(dev)->gen >= 4) {
1543                 if (obj->tiling_mode != I915_TILING_NONE)
1544                         dspcntr |= DISPPLANE_TILED;
1545                 else
1546                         dspcntr &= ~DISPPLANE_TILED;
1547         }
1548
1549         if (HAS_PCH_SPLIT(dev))
1550                 /* must disable */
1551                 dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
1552
1553         I915_WRITE(reg, dspcntr);
1554
1555         Start = obj->gtt_offset;
1556         Offset = y * fb->pitch + x * (fb->bits_per_pixel / 8);
1557
1558         DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
1559                       Start, Offset, x, y, fb->pitch);
1560         I915_WRITE(DSPSTRIDE(plane), fb->pitch);
1561         if (INTEL_INFO(dev)->gen >= 4) {
1562                 I915_WRITE(DSPSURF(plane), Start);
1563                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
1564                 I915_WRITE(DSPADDR(plane), Offset);
1565         } else
1566                 I915_WRITE(DSPADDR(plane), Start + Offset);
1567         POSTING_READ(reg);
1568
1569         intel_update_fbc(dev);
1570         intel_increase_pllclock(crtc);
1571
1572         return 0;
1573 }
1574
1575 static int
1576 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
1577                     struct drm_framebuffer *old_fb)
1578 {
1579         struct drm_device *dev = crtc->dev;
1580         struct drm_i915_master_private *master_priv;
1581         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1582         int ret;
1583
1584         /* no fb bound */
1585         if (!crtc->fb) {
1586                 DRM_DEBUG_KMS("No FB bound\n");
1587                 return 0;
1588         }
1589
1590         switch (intel_crtc->plane) {
1591         case 0:
1592         case 1:
1593                 break;
1594         default:
1595                 return -EINVAL;
1596         }
1597
1598         mutex_lock(&dev->struct_mutex);
1599         ret = intel_pin_and_fence_fb_obj(dev,
1600                                          to_intel_framebuffer(crtc->fb)->obj,
1601                                          NULL);
1602         if (ret != 0) {
1603                 mutex_unlock(&dev->struct_mutex);
1604                 return ret;
1605         }
1606
1607         if (old_fb) {
1608                 struct drm_i915_private *dev_priv = dev->dev_private;
1609                 struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
1610
1611                 wait_event(dev_priv->pending_flip_queue,
1612                            atomic_read(&obj->pending_flip) == 0);
1613
1614                 /* Big Hammer, we also need to ensure that any pending
1615                  * MI_WAIT_FOR_EVENT inside a user batch buffer on the
1616                  * current scanout is retired before unpinning the old
1617                  * framebuffer.
1618                  */
1619                 ret = i915_gem_object_flush_gpu(obj, false);
1620                 if (ret) {
1621                         i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
1622                         mutex_unlock(&dev->struct_mutex);
1623                         return ret;
1624                 }
1625         }
1626
1627         ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y,
1628                                          LEAVE_ATOMIC_MODE_SET);
1629         if (ret) {
1630                 i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
1631                 mutex_unlock(&dev->struct_mutex);
1632                 return ret;
1633         }
1634
1635         if (old_fb) {
1636                 intel_wait_for_vblank(dev, intel_crtc->pipe);
1637                 i915_gem_object_unpin(to_intel_framebuffer(old_fb)->obj);
1638         }
1639
1640         mutex_unlock(&dev->struct_mutex);
1641
1642         if (!dev->primary->master)
1643                 return 0;
1644
1645         master_priv = dev->primary->master->driver_priv;
1646         if (!master_priv->sarea_priv)
1647                 return 0;
1648
1649         if (intel_crtc->pipe) {
1650                 master_priv->sarea_priv->pipeB_x = x;
1651                 master_priv->sarea_priv->pipeB_y = y;
1652         } else {
1653                 master_priv->sarea_priv->pipeA_x = x;
1654                 master_priv->sarea_priv->pipeA_y = y;
1655         }
1656
1657         return 0;
1658 }
1659
1660 static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
1661 {
1662         struct drm_device *dev = crtc->dev;
1663         struct drm_i915_private *dev_priv = dev->dev_private;
1664         u32 dpa_ctl;
1665
1666         DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
1667         dpa_ctl = I915_READ(DP_A);
1668         dpa_ctl &= ~DP_PLL_FREQ_MASK;
1669
1670         if (clock < 200000) {
1671                 u32 temp;
1672                 dpa_ctl |= DP_PLL_FREQ_160MHZ;
1673                 /* workaround for 160Mhz:
1674                    1) program 0x4600c bits 15:0 = 0x8124
1675                    2) program 0x46010 bit 0 = 1
1676                    3) program 0x46034 bit 24 = 1
1677                    4) program 0x64000 bit 14 = 1
1678                    */
1679                 temp = I915_READ(0x4600c);
1680                 temp &= 0xffff0000;
1681                 I915_WRITE(0x4600c, temp | 0x8124);
1682
1683                 temp = I915_READ(0x46010);
1684                 I915_WRITE(0x46010, temp | 1);
1685
1686                 temp = I915_READ(0x46034);
1687                 I915_WRITE(0x46034, temp | (1 << 24));
1688         } else {
1689                 dpa_ctl |= DP_PLL_FREQ_270MHZ;
1690         }
1691         I915_WRITE(DP_A, dpa_ctl);
1692
1693         POSTING_READ(DP_A);
1694         udelay(500);
1695 }
1696
1697 static void intel_fdi_normal_train(struct drm_crtc *crtc)
1698 {
1699         struct drm_device *dev = crtc->dev;
1700         struct drm_i915_private *dev_priv = dev->dev_private;
1701         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1702         int pipe = intel_crtc->pipe;
1703         u32 reg, temp;
1704
1705         /* enable normal train */
1706         reg = FDI_TX_CTL(pipe);
1707         temp = I915_READ(reg);
1708         temp &= ~FDI_LINK_TRAIN_NONE;
1709         temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
1710         I915_WRITE(reg, temp);
1711
1712         reg = FDI_RX_CTL(pipe);
1713         temp = I915_READ(reg);
1714         if (HAS_PCH_CPT(dev)) {
1715                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
1716                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
1717         } else {
1718                 temp &= ~FDI_LINK_TRAIN_NONE;
1719                 temp |= FDI_LINK_TRAIN_NONE;
1720         }
1721         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
1722
1723         /* wait one idle pattern time */
1724         POSTING_READ(reg);
1725         udelay(1000);
1726 }
1727
1728 /* The FDI link training functions for ILK/Ibexpeak. */
1729 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
1730 {
1731         struct drm_device *dev = crtc->dev;
1732         struct drm_i915_private *dev_priv = dev->dev_private;
1733         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1734         int pipe = intel_crtc->pipe;
1735         u32 reg, temp, tries;
1736
1737         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
1738            for train result */
1739         reg = FDI_RX_IMR(pipe);
1740         temp = I915_READ(reg);
1741         temp &= ~FDI_RX_SYMBOL_LOCK;
1742         temp &= ~FDI_RX_BIT_LOCK;
1743         I915_WRITE(reg, temp);
1744         I915_READ(reg);
1745         udelay(150);
1746
1747         /* enable CPU FDI TX and PCH FDI RX */
1748         reg = FDI_TX_CTL(pipe);
1749         temp = I915_READ(reg);
1750         temp &= ~(7 << 19);
1751         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1752         temp &= ~FDI_LINK_TRAIN_NONE;
1753         temp |= FDI_LINK_TRAIN_PATTERN_1;
1754         I915_WRITE(reg, temp | FDI_TX_ENABLE);
1755
1756         reg = FDI_RX_CTL(pipe);
1757         temp = I915_READ(reg);
1758         temp &= ~FDI_LINK_TRAIN_NONE;
1759         temp |= FDI_LINK_TRAIN_PATTERN_1;
1760         I915_WRITE(reg, temp | FDI_RX_ENABLE);
1761
1762         POSTING_READ(reg);
1763         udelay(150);
1764
1765         /* Ironlake workaround, enable clock pointer after FDI enable*/
1766         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_ENABLE);
1767
1768         reg = FDI_RX_IIR(pipe);
1769         for (tries = 0; tries < 5; tries++) {
1770                 temp = I915_READ(reg);
1771                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1772
1773                 if ((temp & FDI_RX_BIT_LOCK)) {
1774                         DRM_DEBUG_KMS("FDI train 1 done.\n");
1775                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
1776                         break;
1777                 }
1778         }
1779         if (tries == 5)
1780                 DRM_ERROR("FDI train 1 fail!\n");
1781
1782         /* Train 2 */
1783         reg = FDI_TX_CTL(pipe);
1784         temp = I915_READ(reg);
1785         temp &= ~FDI_LINK_TRAIN_NONE;
1786         temp |= FDI_LINK_TRAIN_PATTERN_2;
1787         I915_WRITE(reg, temp);
1788
1789         reg = FDI_RX_CTL(pipe);
1790         temp = I915_READ(reg);
1791         temp &= ~FDI_LINK_TRAIN_NONE;
1792         temp |= FDI_LINK_TRAIN_PATTERN_2;
1793         I915_WRITE(reg, temp);
1794
1795         POSTING_READ(reg);
1796         udelay(150);
1797
1798         reg = FDI_RX_IIR(pipe);
1799         for (tries = 0; tries < 5; tries++) {
1800                 temp = I915_READ(reg);
1801                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1802
1803                 if (temp & FDI_RX_SYMBOL_LOCK) {
1804                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
1805                         DRM_DEBUG_KMS("FDI train 2 done.\n");
1806                         break;
1807                 }
1808         }
1809         if (tries == 5)
1810                 DRM_ERROR("FDI train 2 fail!\n");
1811
1812         DRM_DEBUG_KMS("FDI train done\n");
1813
1814 }
1815
1816 static const int const snb_b_fdi_train_param [] = {
1817         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
1818         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
1819         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
1820         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
1821 };
1822
1823 /* The FDI link training functions for SNB/Cougarpoint. */
1824 static void gen6_fdi_link_train(struct drm_crtc *crtc)
1825 {
1826         struct drm_device *dev = crtc->dev;
1827         struct drm_i915_private *dev_priv = dev->dev_private;
1828         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1829         int pipe = intel_crtc->pipe;
1830         u32 reg, temp, i;
1831
1832         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
1833            for train result */
1834         reg = FDI_RX_IMR(pipe);
1835         temp = I915_READ(reg);
1836         temp &= ~FDI_RX_SYMBOL_LOCK;
1837         temp &= ~FDI_RX_BIT_LOCK;
1838         I915_WRITE(reg, temp);
1839
1840         POSTING_READ(reg);
1841         udelay(150);
1842
1843         /* enable CPU FDI TX and PCH FDI RX */
1844         reg = FDI_TX_CTL(pipe);
1845         temp = I915_READ(reg);
1846         temp &= ~(7 << 19);
1847         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1848         temp &= ~FDI_LINK_TRAIN_NONE;
1849         temp |= FDI_LINK_TRAIN_PATTERN_1;
1850         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1851         /* SNB-B */
1852         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
1853         I915_WRITE(reg, temp | FDI_TX_ENABLE);
1854
1855         reg = FDI_RX_CTL(pipe);
1856         temp = I915_READ(reg);
1857         if (HAS_PCH_CPT(dev)) {
1858                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
1859                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
1860         } else {
1861                 temp &= ~FDI_LINK_TRAIN_NONE;
1862                 temp |= FDI_LINK_TRAIN_PATTERN_1;
1863         }
1864         I915_WRITE(reg, temp | FDI_RX_ENABLE);
1865
1866         POSTING_READ(reg);
1867         udelay(150);
1868
1869         for (i = 0; i < 4; i++ ) {
1870                 reg = FDI_TX_CTL(pipe);
1871                 temp = I915_READ(reg);
1872                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1873                 temp |= snb_b_fdi_train_param[i];
1874                 I915_WRITE(reg, temp);
1875
1876                 POSTING_READ(reg);
1877                 udelay(500);
1878
1879                 reg = FDI_RX_IIR(pipe);
1880                 temp = I915_READ(reg);
1881                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1882
1883                 if (temp & FDI_RX_BIT_LOCK) {
1884                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
1885                         DRM_DEBUG_KMS("FDI train 1 done.\n");
1886                         break;
1887                 }
1888         }
1889         if (i == 4)
1890                 DRM_ERROR("FDI train 1 fail!\n");
1891
1892         /* Train 2 */
1893         reg = FDI_TX_CTL(pipe);
1894         temp = I915_READ(reg);
1895         temp &= ~FDI_LINK_TRAIN_NONE;
1896         temp |= FDI_LINK_TRAIN_PATTERN_2;
1897         if (IS_GEN6(dev)) {
1898                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1899                 /* SNB-B */
1900                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
1901         }
1902         I915_WRITE(reg, temp);
1903
1904         reg = FDI_RX_CTL(pipe);
1905         temp = I915_READ(reg);
1906         if (HAS_PCH_CPT(dev)) {
1907                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
1908                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
1909         } else {
1910                 temp &= ~FDI_LINK_TRAIN_NONE;
1911                 temp |= FDI_LINK_TRAIN_PATTERN_2;
1912         }
1913         I915_WRITE(reg, temp);
1914
1915         POSTING_READ(reg);
1916         udelay(150);
1917
1918         for (i = 0; i < 4; i++ ) {
1919                 reg = FDI_TX_CTL(pipe);
1920                 temp = I915_READ(reg);
1921                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
1922                 temp |= snb_b_fdi_train_param[i];
1923                 I915_WRITE(reg, temp);
1924
1925                 POSTING_READ(reg);
1926                 udelay(500);
1927
1928                 reg = FDI_RX_IIR(pipe);
1929                 temp = I915_READ(reg);
1930                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
1931
1932                 if (temp & FDI_RX_SYMBOL_LOCK) {
1933                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
1934                         DRM_DEBUG_KMS("FDI train 2 done.\n");
1935                         break;
1936                 }
1937         }
1938         if (i == 4)
1939                 DRM_ERROR("FDI train 2 fail!\n");
1940
1941         DRM_DEBUG_KMS("FDI train done.\n");
1942 }
1943
1944 static void ironlake_fdi_enable(struct drm_crtc *crtc)
1945 {
1946         struct drm_device *dev = crtc->dev;
1947         struct drm_i915_private *dev_priv = dev->dev_private;
1948         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1949         int pipe = intel_crtc->pipe;
1950         u32 reg, temp;
1951
1952         /* Write the TU size bits so error detection works */
1953         I915_WRITE(FDI_RX_TUSIZE1(pipe),
1954                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
1955
1956         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
1957         reg = FDI_RX_CTL(pipe);
1958         temp = I915_READ(reg);
1959         temp &= ~((0x7 << 19) | (0x7 << 16));
1960         temp |= (intel_crtc->fdi_lanes - 1) << 19;
1961         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
1962         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
1963
1964         POSTING_READ(reg);
1965         udelay(200);
1966
1967         /* Switch from Rawclk to PCDclk */
1968         temp = I915_READ(reg);
1969         I915_WRITE(reg, temp | FDI_PCDCLK);
1970
1971         POSTING_READ(reg);
1972         udelay(200);
1973
1974         /* Enable CPU FDI TX PLL, always on for Ironlake */
1975         reg = FDI_TX_CTL(pipe);
1976         temp = I915_READ(reg);
1977         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
1978                 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
1979
1980                 POSTING_READ(reg);
1981                 udelay(100);
1982         }
1983 }
1984
1985 static void intel_flush_display_plane(struct drm_device *dev,
1986                                       int plane)
1987 {
1988         struct drm_i915_private *dev_priv = dev->dev_private;
1989         u32 reg = DSPADDR(plane);
1990         I915_WRITE(reg, I915_READ(reg));
1991 }
1992
1993 /*
1994  * When we disable a pipe, we need to clear any pending scanline wait events
1995  * to avoid hanging the ring, which we assume we are waiting on.
1996  */
1997 static void intel_clear_scanline_wait(struct drm_device *dev)
1998 {
1999         struct drm_i915_private *dev_priv = dev->dev_private;
2000         struct intel_ring_buffer *ring;
2001         u32 tmp;
2002
2003         if (IS_GEN2(dev))
2004                 /* Can't break the hang on i8xx */
2005                 return;
2006
2007         ring = LP_RING(dev_priv);
2008         tmp = I915_READ_CTL(ring);
2009         if (tmp & RING_WAIT)
2010                 I915_WRITE_CTL(ring, tmp);
2011 }
2012
2013 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2014 {
2015         struct drm_i915_gem_object *obj;
2016         struct drm_i915_private *dev_priv;
2017
2018         if (crtc->fb == NULL)
2019                 return;
2020
2021         obj = to_intel_framebuffer(crtc->fb)->obj;
2022         dev_priv = crtc->dev->dev_private;
2023         wait_event(dev_priv->pending_flip_queue,
2024                    atomic_read(&obj->pending_flip) == 0);
2025 }
2026
2027 static void ironlake_crtc_enable(struct drm_crtc *crtc)
2028 {
2029         struct drm_device *dev = crtc->dev;
2030         struct drm_i915_private *dev_priv = dev->dev_private;
2031         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2032         int pipe = intel_crtc->pipe;
2033         int plane = intel_crtc->plane;
2034         u32 reg, temp;
2035
2036         if (intel_crtc->active)
2037                 return;
2038
2039         intel_crtc->active = true;
2040         intel_update_watermarks(dev);
2041
2042         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
2043                 temp = I915_READ(PCH_LVDS);
2044                 if ((temp & LVDS_PORT_EN) == 0)
2045                         I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
2046         }
2047
2048         ironlake_fdi_enable(crtc);
2049
2050         /* Enable panel fitting for LVDS */
2051         if (dev_priv->pch_pf_size &&
2052             (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) || HAS_eDP)) {
2053                 /* Force use of hard-coded filter coefficients
2054                  * as some pre-programmed values are broken,
2055                  * e.g. x201.
2056                  */
2057                 I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1,
2058                            PF_ENABLE | PF_FILTER_MED_3x3);
2059                 I915_WRITE(pipe ? PFB_WIN_POS : PFA_WIN_POS,
2060                            dev_priv->pch_pf_pos);
2061                 I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ,
2062                            dev_priv->pch_pf_size);
2063         }
2064
2065         /* Enable CPU pipe */
2066         reg = PIPECONF(pipe);
2067         temp = I915_READ(reg);
2068         if ((temp & PIPECONF_ENABLE) == 0) {
2069                 I915_WRITE(reg, temp | PIPECONF_ENABLE);
2070                 POSTING_READ(reg);
2071                 intel_wait_for_vblank(dev, intel_crtc->pipe);
2072         }
2073
2074         /* configure and enable CPU plane */
2075         reg = DSPCNTR(plane);
2076         temp = I915_READ(reg);
2077         if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
2078                 I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
2079                 intel_flush_display_plane(dev, plane);
2080         }
2081
2082         /* For PCH output, training FDI link */
2083         if (IS_GEN6(dev))
2084                 gen6_fdi_link_train(crtc);
2085         else
2086                 ironlake_fdi_link_train(crtc);
2087
2088         /* enable PCH DPLL */
2089         reg = PCH_DPLL(pipe);
2090         temp = I915_READ(reg);
2091         if ((temp & DPLL_VCO_ENABLE) == 0) {
2092                 I915_WRITE(reg, temp | DPLL_VCO_ENABLE);
2093                 POSTING_READ(reg);
2094                 udelay(200);
2095         }
2096
2097         if (HAS_PCH_CPT(dev)) {
2098                 /* Be sure PCH DPLL SEL is set */
2099                 temp = I915_READ(PCH_DPLL_SEL);
2100                 if (pipe == 0 && (temp & TRANSA_DPLL_ENABLE) == 0)
2101                         temp |= (TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL);
2102                 else if (pipe == 1 && (temp & TRANSB_DPLL_ENABLE) == 0)
2103                         temp |= (TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
2104                 I915_WRITE(PCH_DPLL_SEL, temp);
2105         }
2106
2107         /* set transcoder timing */
2108         I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
2109         I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
2110         I915_WRITE(TRANS_HSYNC(pipe),  I915_READ(HSYNC(pipe)));
2111
2112         I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
2113         I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
2114         I915_WRITE(TRANS_VSYNC(pipe),  I915_READ(VSYNC(pipe)));
2115
2116         intel_fdi_normal_train(crtc);
2117
2118         /* For PCH DP, enable TRANS_DP_CTL */
2119         if (HAS_PCH_CPT(dev) &&
2120             intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
2121                 reg = TRANS_DP_CTL(pipe);
2122                 temp = I915_READ(reg);
2123                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
2124                           TRANS_DP_SYNC_MASK |
2125                           TRANS_DP_BPC_MASK);
2126                 temp |= (TRANS_DP_OUTPUT_ENABLE |
2127                          TRANS_DP_ENH_FRAMING);
2128                 temp |= TRANS_DP_8BPC;
2129
2130                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
2131                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
2132                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
2133                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
2134
2135                 switch (intel_trans_dp_port_sel(crtc)) {
2136                 case PCH_DP_B:
2137                         temp |= TRANS_DP_PORT_SEL_B;
2138                         break;
2139                 case PCH_DP_C:
2140                         temp |= TRANS_DP_PORT_SEL_C;
2141                         break;
2142                 case PCH_DP_D:
2143                         temp |= TRANS_DP_PORT_SEL_D;
2144                         break;
2145                 default:
2146                         DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n");
2147                         temp |= TRANS_DP_PORT_SEL_B;
2148                         break;
2149                 }
2150
2151                 I915_WRITE(reg, temp);
2152         }
2153
2154         /* enable PCH transcoder */
2155         reg = TRANSCONF(pipe);
2156         temp = I915_READ(reg);
2157         /*
2158          * make the BPC in transcoder be consistent with
2159          * that in pipeconf reg.
2160          */
2161         temp &= ~PIPE_BPC_MASK;
2162         temp |= I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK;
2163         I915_WRITE(reg, temp | TRANS_ENABLE);
2164         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
2165                 DRM_ERROR("failed to enable transcoder %d\n", pipe);
2166
2167         intel_crtc_load_lut(crtc);
2168         intel_update_fbc(dev);
2169         intel_crtc_update_cursor(crtc, true);
2170 }
2171
2172 static void ironlake_crtc_disable(struct drm_crtc *crtc)
2173 {
2174         struct drm_device *dev = crtc->dev;
2175         struct drm_i915_private *dev_priv = dev->dev_private;
2176         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2177         int pipe = intel_crtc->pipe;
2178         int plane = intel_crtc->plane;
2179         u32 reg, temp;
2180
2181         if (!intel_crtc->active)
2182                 return;
2183
2184         intel_crtc_wait_for_pending_flips(crtc);
2185         drm_vblank_off(dev, pipe);
2186         intel_crtc_update_cursor(crtc, false);
2187
2188         /* Disable display plane */
2189         reg = DSPCNTR(plane);
2190         temp = I915_READ(reg);
2191         if (temp & DISPLAY_PLANE_ENABLE) {
2192                 I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
2193                 intel_flush_display_plane(dev, plane);
2194         }
2195
2196         if (dev_priv->cfb_plane == plane &&
2197             dev_priv->display.disable_fbc)
2198                 dev_priv->display.disable_fbc(dev);
2199
2200         /* disable cpu pipe, disable after all planes disabled */
2201         reg = PIPECONF(pipe);
2202         temp = I915_READ(reg);
2203         if (temp & PIPECONF_ENABLE) {
2204                 I915_WRITE(reg, temp & ~PIPECONF_ENABLE);
2205                 POSTING_READ(reg);
2206                 /* wait for cpu pipe off, pipe state */
2207                 intel_wait_for_pipe_off(dev, intel_crtc->pipe);
2208         }
2209
2210         /* Disable PF */
2211         I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1, 0);
2212         I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ, 0);
2213
2214         /* disable CPU FDI tx and PCH FDI rx */
2215         reg = FDI_TX_CTL(pipe);
2216         temp = I915_READ(reg);
2217         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2218         POSTING_READ(reg);
2219
2220         reg = FDI_RX_CTL(pipe);
2221         temp = I915_READ(reg);
2222         temp &= ~(0x7 << 16);
2223         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2224         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2225
2226         POSTING_READ(reg);
2227         udelay(100);
2228
2229         /* Ironlake workaround, disable clock pointer after downing FDI */
2230         if (HAS_PCH_IBX(dev))
2231                 I915_WRITE(FDI_RX_CHICKEN(pipe),
2232                            I915_READ(FDI_RX_CHICKEN(pipe) &
2233                                      ~FDI_RX_PHASE_SYNC_POINTER_ENABLE));
2234
2235         /* still set train pattern 1 */
2236         reg = FDI_TX_CTL(pipe);
2237         temp = I915_READ(reg);
2238         temp &= ~FDI_LINK_TRAIN_NONE;
2239         temp |= FDI_LINK_TRAIN_PATTERN_1;
2240         I915_WRITE(reg, temp);
2241
2242         reg = FDI_RX_CTL(pipe);
2243         temp = I915_READ(reg);
2244         if (HAS_PCH_CPT(dev)) {
2245                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2246                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2247         } else {
2248                 temp &= ~FDI_LINK_TRAIN_NONE;
2249                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2250         }
2251         /* BPC in FDI rx is consistent with that in PIPECONF */
2252         temp &= ~(0x07 << 16);
2253         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2254         I915_WRITE(reg, temp);
2255
2256         POSTING_READ(reg);
2257         udelay(100);
2258
2259         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
2260                 temp = I915_READ(PCH_LVDS);
2261                 if (temp & LVDS_PORT_EN) {
2262                         I915_WRITE(PCH_LVDS, temp & ~LVDS_PORT_EN);
2263                         POSTING_READ(PCH_LVDS);
2264                         udelay(100);
2265                 }
2266         }
2267
2268         /* disable PCH transcoder */
2269         reg = TRANSCONF(plane);
2270         temp = I915_READ(reg);
2271         if (temp & TRANS_ENABLE) {
2272                 I915_WRITE(reg, temp & ~TRANS_ENABLE);
2273                 /* wait for PCH transcoder off, transcoder state */
2274                 if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
2275                         DRM_ERROR("failed to disable transcoder\n");
2276         }
2277
2278         if (HAS_PCH_CPT(dev)) {
2279                 /* disable TRANS_DP_CTL */
2280                 reg = TRANS_DP_CTL(pipe);
2281                 temp = I915_READ(reg);
2282                 temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
2283                 I915_WRITE(reg, temp);
2284
2285                 /* disable DPLL_SEL */
2286                 temp = I915_READ(PCH_DPLL_SEL);
2287                 if (pipe == 0)
2288                         temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
2289                 else
2290                         temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
2291                 I915_WRITE(PCH_DPLL_SEL, temp);
2292         }
2293
2294         /* disable PCH DPLL */
2295         reg = PCH_DPLL(pipe);
2296         temp = I915_READ(reg);
2297         I915_WRITE(reg, temp & ~DPLL_VCO_ENABLE);
2298
2299         /* Switch from PCDclk to Rawclk */
2300         reg = FDI_RX_CTL(pipe);
2301         temp = I915_READ(reg);
2302         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2303
2304         /* Disable CPU FDI TX PLL */
2305         reg = FDI_TX_CTL(pipe);
2306         temp = I915_READ(reg);
2307         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2308
2309         POSTING_READ(reg);
2310         udelay(100);
2311
2312         reg = FDI_RX_CTL(pipe);
2313         temp = I915_READ(reg);
2314         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2315
2316         /* Wait for the clocks to turn off. */
2317         POSTING_READ(reg);
2318         udelay(100);
2319
2320         intel_crtc->active = false;
2321         intel_update_watermarks(dev);
2322         intel_update_fbc(dev);
2323         intel_clear_scanline_wait(dev);
2324 }
2325
2326 static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
2327 {
2328         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2329         int pipe = intel_crtc->pipe;
2330         int plane = intel_crtc->plane;
2331
2332         /* XXX: When our outputs are all unaware of DPMS modes other than off
2333          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
2334          */
2335         switch (mode) {
2336         case DRM_MODE_DPMS_ON:
2337         case DRM_MODE_DPMS_STANDBY:
2338         case DRM_MODE_DPMS_SUSPEND:
2339                 DRM_DEBUG_KMS("crtc %d/%d dpms on\n", pipe, plane);
2340                 ironlake_crtc_enable(crtc);
2341                 break;
2342
2343         case DRM_MODE_DPMS_OFF:
2344                 DRM_DEBUG_KMS("crtc %d/%d dpms off\n", pipe, plane);
2345                 ironlake_crtc_disable(crtc);
2346                 break;
2347         }
2348 }
2349
2350 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
2351 {
2352         if (!enable && intel_crtc->overlay) {
2353                 struct drm_device *dev = intel_crtc->base.dev;
2354
2355                 mutex_lock(&dev->struct_mutex);
2356                 (void) intel_overlay_switch_off(intel_crtc->overlay, false);
2357                 mutex_unlock(&dev->struct_mutex);
2358         }
2359
2360         /* Let userspace switch the overlay on again. In most cases userspace
2361          * has to recompute where to put it anyway.
2362          */
2363 }
2364
2365 static void i9xx_crtc_enable(struct drm_crtc *crtc)
2366 {
2367         struct drm_device *dev = crtc->dev;
2368         struct drm_i915_private *dev_priv = dev->dev_private;
2369         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2370         int pipe = intel_crtc->pipe;
2371         int plane = intel_crtc->plane;
2372         u32 reg, temp;
2373
2374         if (intel_crtc->active)
2375                 return;
2376
2377         intel_crtc->active = true;
2378         intel_update_watermarks(dev);
2379
2380         /* Enable the DPLL */
2381         reg = DPLL(pipe);
2382         temp = I915_READ(reg);
2383         if ((temp & DPLL_VCO_ENABLE) == 0) {
2384                 I915_WRITE(reg, temp);
2385
2386                 /* Wait for the clocks to stabilize. */
2387                 POSTING_READ(reg);
2388                 udelay(150);
2389
2390                 I915_WRITE(reg, temp | DPLL_VCO_ENABLE);
2391
2392                 /* Wait for the clocks to stabilize. */
2393                 POSTING_READ(reg);
2394                 udelay(150);
2395
2396                 I915_WRITE(reg, temp | DPLL_VCO_ENABLE);
2397
2398                 /* Wait for the clocks to stabilize. */
2399                 POSTING_READ(reg);
2400                 udelay(150);
2401         }
2402
2403         /* Enable the pipe */
2404         reg = PIPECONF(pipe);
2405         temp = I915_READ(reg);
2406         if ((temp & PIPECONF_ENABLE) == 0)
2407                 I915_WRITE(reg, temp | PIPECONF_ENABLE);
2408
2409         /* Enable the plane */
2410         reg = DSPCNTR(plane);
2411         temp = I915_READ(reg);
2412         if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
2413                 I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
2414                 intel_flush_display_plane(dev, plane);
2415         }
2416
2417         intel_crtc_load_lut(crtc);
2418         intel_update_fbc(dev);
2419
2420         /* Give the overlay scaler a chance to enable if it's on this pipe */
2421         intel_crtc_dpms_overlay(intel_crtc, true);
2422         intel_crtc_update_cursor(crtc, true);
2423 }
2424
2425 static void i9xx_crtc_disable(struct drm_crtc *crtc)
2426 {
2427         struct drm_device *dev = crtc->dev;
2428         struct drm_i915_private *dev_priv = dev->dev_private;
2429         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2430         int pipe = intel_crtc->pipe;
2431         int plane = intel_crtc->plane;
2432         u32 reg, temp;
2433
2434         if (!intel_crtc->active)
2435                 return;
2436
2437         /* Give the overlay scaler a chance to disable if it's on this pipe */
2438         intel_crtc_wait_for_pending_flips(crtc);
2439         drm_vblank_off(dev, pipe);
2440         intel_crtc_dpms_overlay(intel_crtc, false);
2441         intel_crtc_update_cursor(crtc, false);
2442
2443         if (dev_priv->cfb_plane == plane &&
2444             dev_priv->display.disable_fbc)
2445                 dev_priv->display.disable_fbc(dev);
2446
2447         /* Disable display plane */
2448         reg = DSPCNTR(plane);
2449         temp = I915_READ(reg);
2450         if (temp & DISPLAY_PLANE_ENABLE) {
2451                 I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
2452                 /* Flush the plane changes */
2453                 intel_flush_display_plane(dev, plane);
2454
2455                 /* Wait for vblank for the disable to take effect */
2456                 if (IS_GEN2(dev))
2457                         intel_wait_for_vblank(dev, pipe);
2458         }
2459
2460         /* Don't disable pipe A or pipe A PLLs if needed */
2461         if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
2462                 goto done;
2463
2464         /* Next, disable display pipes */
2465         reg = PIPECONF(pipe);
2466         temp = I915_READ(reg);
2467         if (temp & PIPECONF_ENABLE) {
2468                 I915_WRITE(reg, temp & ~PIPECONF_ENABLE);
2469
2470                 /* Wait for the pipe to turn off */
2471                 POSTING_READ(reg);
2472                 intel_wait_for_pipe_off(dev, pipe);
2473         }
2474
2475         reg = DPLL(pipe);
2476         temp = I915_READ(reg);
2477         if (temp & DPLL_VCO_ENABLE) {
2478                 I915_WRITE(reg, temp & ~DPLL_VCO_ENABLE);
2479
2480                 /* Wait for the clocks to turn off. */
2481                 POSTING_READ(reg);
2482                 udelay(150);
2483         }
2484
2485 done:
2486         intel_crtc->active = false;
2487         intel_update_fbc(dev);
2488         intel_update_watermarks(dev);
2489         intel_clear_scanline_wait(dev);
2490 }
2491
2492 static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
2493 {
2494         /* XXX: When our outputs are all unaware of DPMS modes other than off
2495          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
2496          */
2497         switch (mode) {
2498         case DRM_MODE_DPMS_ON:
2499         case DRM_MODE_DPMS_STANDBY:
2500         case DRM_MODE_DPMS_SUSPEND:
2501                 i9xx_crtc_enable(crtc);
2502                 break;
2503         case DRM_MODE_DPMS_OFF:
2504                 i9xx_crtc_disable(crtc);
2505                 break;
2506         }
2507 }
2508
2509 /**
2510  * Sets the power management mode of the pipe and plane.
2511  */
2512 static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
2513 {
2514         struct drm_device *dev = crtc->dev;
2515         struct drm_i915_private *dev_priv = dev->dev_private;
2516         struct drm_i915_master_private *master_priv;
2517         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2518         int pipe = intel_crtc->pipe;
2519         bool enabled;
2520
2521         if (intel_crtc->dpms_mode == mode)
2522                 return;
2523
2524         intel_crtc->dpms_mode = mode;
2525
2526         dev_priv->display.dpms(crtc, mode);
2527
2528         if (!dev->primary->master)
2529                 return;
2530
2531         master_priv = dev->primary->master->driver_priv;
2532         if (!master_priv->sarea_priv)
2533                 return;
2534
2535         enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
2536
2537         switch (pipe) {
2538         case 0:
2539                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
2540                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
2541                 break;
2542         case 1:
2543                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
2544                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
2545                 break;
2546         default:
2547                 DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
2548                 break;
2549         }
2550 }
2551
2552 static void intel_crtc_disable(struct drm_crtc *crtc)
2553 {
2554         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
2555         struct drm_device *dev = crtc->dev;
2556
2557         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
2558
2559         if (crtc->fb) {
2560                 mutex_lock(&dev->struct_mutex);
2561                 i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
2562                 mutex_unlock(&dev->struct_mutex);
2563         }
2564 }
2565
2566 /* Prepare for a mode set.
2567  *
2568  * Note we could be a lot smarter here.  We need to figure out which outputs
2569  * will be enabled, which disabled (in short, how the config will changes)
2570  * and perform the minimum necessary steps to accomplish that, e.g. updating
2571  * watermarks, FBC configuration, making sure PLLs are programmed correctly,
2572  * panel fitting is in the proper state, etc.
2573  */
2574 static void i9xx_crtc_prepare(struct drm_crtc *crtc)
2575 {
2576         i9xx_crtc_disable(crtc);
2577 }
2578
2579 static void i9xx_crtc_commit(struct drm_crtc *crtc)
2580 {
2581         i9xx_crtc_enable(crtc);
2582 }
2583
2584 static void ironlake_crtc_prepare(struct drm_crtc *crtc)
2585 {
2586         ironlake_crtc_disable(crtc);
2587 }
2588
2589 static void ironlake_crtc_commit(struct drm_crtc *crtc)
2590 {
2591         ironlake_crtc_enable(crtc);
2592 }
2593
2594 void intel_encoder_prepare (struct drm_encoder *encoder)
2595 {
2596         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
2597         /* lvds has its own version of prepare see intel_lvds_prepare */
2598         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
2599 }
2600
2601 void intel_encoder_commit (struct drm_encoder *encoder)
2602 {
2603         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
2604         /* lvds has its own version of commit see intel_lvds_commit */
2605         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
2606 }
2607
2608 void intel_encoder_destroy(struct drm_encoder *encoder)
2609 {
2610         struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
2611
2612         drm_encoder_cleanup(encoder);
2613         kfree(intel_encoder);
2614 }
2615
2616 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
2617                                   struct drm_display_mode *mode,
2618                                   struct drm_display_mode *adjusted_mode)
2619 {
2620         struct drm_device *dev = crtc->dev;
2621
2622         if (HAS_PCH_SPLIT(dev)) {
2623                 /* FDI link clock is fixed at 2.7G */
2624                 if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
2625                         return false;
2626         }
2627
2628         /* XXX some encoders set the crtcinfo, others don't.
2629          * Obviously we need some form of conflict resolution here...
2630          */
2631         if (adjusted_mode->crtc_htotal == 0)
2632                 drm_mode_set_crtcinfo(adjusted_mode, 0);
2633
2634         return true;
2635 }
2636
2637 static int i945_get_display_clock_speed(struct drm_device *dev)
2638 {
2639         return 400000;
2640 }
2641
2642 static int i915_get_display_clock_speed(struct drm_device *dev)
2643 {
2644         return 333000;
2645 }
2646
2647 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
2648 {
2649         return 200000;
2650 }
2651
2652 static int i915gm_get_display_clock_speed(struct drm_device *dev)
2653 {
2654         u16 gcfgc = 0;
2655
2656         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
2657
2658         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
2659                 return 133000;
2660         else {
2661                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
2662                 case GC_DISPLAY_CLOCK_333_MHZ:
2663                         return 333000;
2664                 default:
2665                 case GC_DISPLAY_CLOCK_190_200_MHZ:
2666                         return 190000;
2667                 }
2668         }
2669 }
2670
2671 static int i865_get_display_clock_speed(struct drm_device *dev)
2672 {
2673         return 266000;
2674 }
2675
2676 static int i855_get_display_clock_speed(struct drm_device *dev)
2677 {
2678         u16 hpllcc = 0;
2679         /* Assume that the hardware is in the high speed state.  This
2680          * should be the default.
2681          */
2682         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
2683         case GC_CLOCK_133_200:
2684         case GC_CLOCK_100_200:
2685                 return 200000;
2686         case GC_CLOCK_166_250:
2687                 return 250000;
2688         case GC_CLOCK_100_133:
2689                 return 133000;
2690         }
2691
2692         /* Shouldn't happen */
2693         return 0;
2694 }
2695
2696 static int i830_get_display_clock_speed(struct drm_device *dev)
2697 {
2698         return 133000;
2699 }
2700
2701 struct fdi_m_n {
2702         u32        tu;
2703         u32        gmch_m;
2704         u32        gmch_n;
2705         u32        link_m;
2706         u32        link_n;
2707 };
2708
2709 static void
2710 fdi_reduce_ratio(u32 *num, u32 *den)
2711 {
2712         while (*num > 0xffffff || *den > 0xffffff) {
2713                 *num >>= 1;
2714                 *den >>= 1;
2715         }
2716 }
2717
2718 static void
2719 ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
2720                      int link_clock, struct fdi_m_n *m_n)
2721 {
2722         m_n->tu = 64; /* default size */
2723
2724         /* BUG_ON(pixel_clock > INT_MAX / 36); */
2725         m_n->gmch_m = bits_per_pixel * pixel_clock;
2726         m_n->gmch_n = link_clock * nlanes * 8;
2727         fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
2728
2729         m_n->link_m = pixel_clock;
2730         m_n->link_n = link_clock;
2731         fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
2732 }
2733
2734
2735 struct intel_watermark_params {
2736         unsigned long fifo_size;
2737         unsigned long max_wm;
2738         unsigned long default_wm;
2739         unsigned long guard_size;
2740         unsigned long cacheline_size;
2741 };
2742
2743 /* Pineview has different values for various configs */
2744 static struct intel_watermark_params pineview_display_wm = {
2745         PINEVIEW_DISPLAY_FIFO,
2746         PINEVIEW_MAX_WM,
2747         PINEVIEW_DFT_WM,
2748         PINEVIEW_GUARD_WM,
2749         PINEVIEW_FIFO_LINE_SIZE
2750 };
2751 static struct intel_watermark_params pineview_display_hplloff_wm = {
2752         PINEVIEW_DISPLAY_FIFO,
2753         PINEVIEW_MAX_WM,
2754         PINEVIEW_DFT_HPLLOFF_WM,
2755         PINEVIEW_GUARD_WM,
2756         PINEVIEW_FIFO_LINE_SIZE
2757 };
2758 static struct intel_watermark_params pineview_cursor_wm = {
2759         PINEVIEW_CURSOR_FIFO,
2760         PINEVIEW_CURSOR_MAX_WM,
2761         PINEVIEW_CURSOR_DFT_WM,
2762         PINEVIEW_CURSOR_GUARD_WM,
2763         PINEVIEW_FIFO_LINE_SIZE,
2764 };
2765 static struct intel_watermark_params pineview_cursor_hplloff_wm = {
2766         PINEVIEW_CURSOR_FIFO,
2767         PINEVIEW_CURSOR_MAX_WM,
2768         PINEVIEW_CURSOR_DFT_WM,
2769         PINEVIEW_CURSOR_GUARD_WM,
2770         PINEVIEW_FIFO_LINE_SIZE
2771 };
2772 static struct intel_watermark_params g4x_wm_info = {
2773         G4X_FIFO_SIZE,
2774         G4X_MAX_WM,
2775         G4X_MAX_WM,
2776         2,
2777         G4X_FIFO_LINE_SIZE,
2778 };
2779 static struct intel_watermark_params g4x_cursor_wm_info = {
2780         I965_CURSOR_FIFO,
2781         I965_CURSOR_MAX_WM,
2782         I965_CURSOR_DFT_WM,
2783         2,
2784         G4X_FIFO_LINE_SIZE,
2785 };
2786 static struct intel_watermark_params i965_cursor_wm_info = {
2787         I965_CURSOR_FIFO,
2788         I965_CURSOR_MAX_WM,
2789         I965_CURSOR_DFT_WM,
2790         2,
2791         I915_FIFO_LINE_SIZE,
2792 };
2793 static struct intel_watermark_params i945_wm_info = {
2794         I945_FIFO_SIZE,
2795         I915_MAX_WM,
2796         1,
2797         2,
2798         I915_FIFO_LINE_SIZE
2799 };
2800 static struct intel_watermark_params i915_wm_info = {
2801         I915_FIFO_SIZE,
2802         I915_MAX_WM,
2803         1,
2804         2,
2805         I915_FIFO_LINE_SIZE
2806 };
2807 static struct intel_watermark_params i855_wm_info = {
2808         I855GM_FIFO_SIZE,
2809         I915_MAX_WM,
2810         1,
2811         2,
2812         I830_FIFO_LINE_SIZE
2813 };
2814 static struct intel_watermark_params i830_wm_info = {
2815         I830_FIFO_SIZE,
2816         I915_MAX_WM,
2817         1,
2818         2,
2819         I830_FIFO_LINE_SIZE
2820 };
2821
2822 static struct intel_watermark_params ironlake_display_wm_info = {
2823         ILK_DISPLAY_FIFO,
2824         ILK_DISPLAY_MAXWM,
2825         ILK_DISPLAY_DFTWM,
2826         2,
2827         ILK_FIFO_LINE_SIZE
2828 };
2829
2830 static struct intel_watermark_params ironlake_cursor_wm_info = {
2831         ILK_CURSOR_FIFO,
2832         ILK_CURSOR_MAXWM,
2833         ILK_CURSOR_DFTWM,
2834         2,
2835         ILK_FIFO_LINE_SIZE
2836 };
2837
2838 static struct intel_watermark_params ironlake_display_srwm_info = {
2839         ILK_DISPLAY_SR_FIFO,
2840         ILK_DISPLAY_MAX_SRWM,
2841         ILK_DISPLAY_DFT_SRWM,
2842         2,
2843         ILK_FIFO_LINE_SIZE
2844 };
2845
2846 static struct intel_watermark_params ironlake_cursor_srwm_info = {
2847         ILK_CURSOR_SR_FIFO,
2848         ILK_CURSOR_MAX_SRWM,
2849         ILK_CURSOR_DFT_SRWM,
2850         2,
2851         ILK_FIFO_LINE_SIZE
2852 };
2853
2854 static struct intel_watermark_params sandybridge_display_wm_info = {
2855         SNB_DISPLAY_FIFO,
2856         SNB_DISPLAY_MAXWM,
2857         SNB_DISPLAY_DFTWM,
2858         2,
2859         SNB_FIFO_LINE_SIZE
2860 };
2861
2862 static struct intel_watermark_params sandybridge_cursor_wm_info = {
2863         SNB_CURSOR_FIFO,
2864         SNB_CURSOR_MAXWM,
2865         SNB_CURSOR_DFTWM,
2866         2,
2867         SNB_FIFO_LINE_SIZE
2868 };
2869
2870 static struct intel_watermark_params sandybridge_display_srwm_info = {
2871         SNB_DISPLAY_SR_FIFO,
2872         SNB_DISPLAY_MAX_SRWM,
2873         SNB_DISPLAY_DFT_SRWM,
2874         2,
2875         SNB_FIFO_LINE_SIZE
2876 };
2877
2878 static struct intel_watermark_params sandybridge_cursor_srwm_info = {
2879         SNB_CURSOR_SR_FIFO,
2880         SNB_CURSOR_MAX_SRWM,
2881         SNB_CURSOR_DFT_SRWM,
2882         2,
2883         SNB_FIFO_LINE_SIZE
2884 };
2885
2886
2887 /**
2888  * intel_calculate_wm - calculate watermark level
2889  * @clock_in_khz: pixel clock
2890  * @wm: chip FIFO params
2891  * @pixel_size: display pixel size
2892  * @latency_ns: memory latency for the platform
2893  *
2894  * Calculate the watermark level (the level at which the display plane will
2895  * start fetching from memory again).  Each chip has a different display
2896  * FIFO size and allocation, so the caller needs to figure that out and pass
2897  * in the correct intel_watermark_params structure.
2898  *
2899  * As the pixel clock runs, the FIFO will be drained at a rate that depends
2900  * on the pixel size.  When it reaches the watermark level, it'll start
2901  * fetching FIFO line sized based chunks from memory until the FIFO fills
2902  * past the watermark point.  If the FIFO drains completely, a FIFO underrun
2903  * will occur, and a display engine hang could result.
2904  */
2905 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
2906                                         struct intel_watermark_params *wm,
2907                                         int pixel_size,
2908                                         unsigned long latency_ns)
2909 {
2910         long entries_required, wm_size;
2911
2912         /*
2913          * Note: we need to make sure we don't overflow for various clock &
2914          * latency values.
2915          * clocks go from a few thousand to several hundred thousand.
2916          * latency is usually a few thousand
2917          */
2918         entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
2919                 1000;
2920         entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
2921
2922         DRM_DEBUG_KMS("FIFO entries required for mode: %d\n", entries_required);
2923
2924         wm_size = wm->fifo_size - (entries_required + wm->guard_size);
2925
2926         DRM_DEBUG_KMS("FIFO watermark level: %d\n", wm_size);
2927
2928         /* Don't promote wm_size to unsigned... */
2929         if (wm_size > (long)wm->max_wm)
2930                 wm_size = wm->max_wm;
2931         if (wm_size <= 0)
2932                 wm_size = wm->default_wm;
2933         return wm_size;
2934 }
2935
2936 struct cxsr_latency {
2937         int is_desktop;
2938         int is_ddr3;
2939         unsigned long fsb_freq;
2940         unsigned long mem_freq;
2941         unsigned long display_sr;
2942         unsigned long display_hpll_disable;
2943         unsigned long cursor_sr;
2944         unsigned long cursor_hpll_disable;
2945 };
2946
2947 static const struct cxsr_latency cxsr_latency_table[] = {
2948         {1, 0, 800, 400, 3382, 33382, 3983, 33983},    /* DDR2-400 SC */
2949         {1, 0, 800, 667, 3354, 33354, 3807, 33807},    /* DDR2-667 SC */
2950         {1, 0, 800, 800, 3347, 33347, 3763, 33763},    /* DDR2-800 SC */
2951         {1, 1, 800, 667, 6420, 36420, 6873, 36873},    /* DDR3-667 SC */
2952         {1, 1, 800, 800, 5902, 35902, 6318, 36318},    /* DDR3-800 SC */
2953
2954         {1, 0, 667, 400, 3400, 33400, 4021, 34021},    /* DDR2-400 SC */
2955         {1, 0, 667, 667, 3372, 33372, 3845, 33845},    /* DDR2-667 SC */
2956         {1, 0, 667, 800, 3386, 33386, 3822, 33822},    /* DDR2-800 SC */
2957         {1, 1, 667, 667, 6438, 36438, 6911, 36911},    /* DDR3-667 SC */
2958         {1, 1, 667, 800, 5941, 35941, 6377, 36377},    /* DDR3-800 SC */
2959
2960         {1, 0, 400, 400, 3472, 33472, 4173, 34173},    /* DDR2-400 SC */
2961         {1, 0, 400, 667, 3443, 33443, 3996, 33996},    /* DDR2-667 SC */
2962         {1, 0, 400, 800, 3430, 33430, 3946, 33946},    /* DDR2-800 SC */
2963         {1, 1, 400, 667, 6509, 36509, 7062, 37062},    /* DDR3-667 SC */
2964         {1, 1, 400, 800, 5985, 35985, 6501, 36501},    /* DDR3-800 SC */
2965
2966         {0, 0, 800, 400, 3438, 33438, 4065, 34065},    /* DDR2-400 SC */
2967         {0, 0, 800, 667, 3410, 33410, 3889, 33889},    /* DDR2-667 SC */
2968         {0, 0, 800, 800, 3403, 33403, 3845, 33845},    /* DDR2-800 SC */
2969         {0, 1, 800, 667, 6476, 36476, 6955, 36955},    /* DDR3-667 SC */
2970         {0, 1, 800, 800, 5958, 35958, 6400, 36400},    /* DDR3-800 SC */
2971
2972         {0, 0, 667, 400, 3456, 33456, 4103, 34106},    /* DDR2-400 SC */
2973         {0, 0, 667, 667, 3428, 33428, 3927, 33927},    /* DDR2-667 SC */
2974         {0, 0, 667, 800, 3443, 33443, 3905, 33905},    /* DDR2-800 SC */
2975         {0, 1, 667, 667, 6494, 36494, 6993, 36993},    /* DDR3-667 SC */
2976         {0, 1, 667, 800, 5998, 35998, 6460, 36460},    /* DDR3-800 SC */
2977
2978         {0, 0, 400, 400, 3528, 33528, 4255, 34255},    /* DDR2-400 SC */
2979         {0, 0, 400, 667, 3500, 33500, 4079, 34079},    /* DDR2-667 SC */
2980         {0, 0, 400, 800, 3487, 33487, 4029, 34029},    /* DDR2-800 SC */
2981         {0, 1, 400, 667, 6566, 36566, 7145, 37145},    /* DDR3-667 SC */
2982         {0, 1, 400, 800, 6042, 36042, 6584, 36584},    /* DDR3-800 SC */
2983 };
2984
2985 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
2986                                                          int is_ddr3,
2987                                                          int fsb,
2988                                                          int mem)
2989 {
2990         const struct cxsr_latency *latency;
2991         int i;
2992
2993         if (fsb == 0 || mem == 0)
2994                 return NULL;
2995
2996         for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
2997                 latency = &cxsr_latency_table[i];
2998                 if (is_desktop == latency->is_desktop &&
2999                     is_ddr3 == latency->is_ddr3 &&
3000                     fsb == latency->fsb_freq && mem == latency->mem_freq)
3001                         return latency;
3002         }
3003
3004         DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
3005
3006         return NULL;
3007 }
3008
3009 static void pineview_disable_cxsr(struct drm_device *dev)
3010 {
3011         struct drm_i915_private *dev_priv = dev->dev_private;
3012
3013         /* deactivate cxsr */
3014         I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
3015 }
3016
3017 /*
3018  * Latency for FIFO fetches is dependent on several factors:
3019  *   - memory configuration (speed, channels)
3020  *   - chipset
3021  *   - current MCH state
3022  * It can be fairly high in some situations, so here we assume a fairly
3023  * pessimal value.  It's a tradeoff between extra memory fetches (if we
3024  * set this value too high, the FIFO will fetch frequently to stay full)
3025  * and power consumption (set it too low to save power and we might see
3026  * FIFO underruns and display "flicker").
3027  *
3028  * A value of 5us seems to be a good balance; safe for very low end
3029  * platforms but not overly aggressive on lower latency configs.
3030  */
3031 static const int latency_ns = 5000;
3032
3033 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
3034 {
3035         struct drm_i915_private *dev_priv = dev->dev_private;
3036         uint32_t dsparb = I915_READ(DSPARB);
3037         int size;
3038
3039         size = dsparb & 0x7f;
3040         if (plane)
3041                 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
3042
3043         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3044                       plane ? "B" : "A", size);
3045
3046         return size;
3047 }
3048
3049 static int i85x_get_fifo_size(struct drm_device *dev, int plane)
3050 {
3051         struct drm_i915_private *dev_priv = dev->dev_private;
3052         uint32_t dsparb = I915_READ(DSPARB);
3053         int size;
3054
3055         size = dsparb & 0x1ff;
3056         if (plane)
3057                 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
3058         size >>= 1; /* Convert to cachelines */
3059
3060         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3061                       plane ? "B" : "A", size);
3062
3063         return size;
3064 }
3065
3066 static int i845_get_fifo_size(struct drm_device *dev, int plane)
3067 {
3068         struct drm_i915_private *dev_priv = dev->dev_private;
3069         uint32_t dsparb = I915_READ(DSPARB);
3070         int size;
3071
3072         size = dsparb & 0x7f;
3073         size >>= 2; /* Convert to cachelines */
3074
3075         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3076                       plane ? "B" : "A",
3077                       size);
3078
3079         return size;
3080 }
3081
3082 static int i830_get_fifo_size(struct drm_device *dev, int plane)
3083 {
3084         struct drm_i915_private *dev_priv = dev->dev_private;
3085         uint32_t dsparb = I915_READ(DSPARB);
3086         int size;
3087
3088         size = dsparb & 0x7f;
3089         size >>= 1; /* Convert to cachelines */
3090
3091         DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3092                       plane ? "B" : "A", size);
3093
3094         return size;
3095 }
3096
3097 static void pineview_update_wm(struct drm_device *dev,  int planea_clock,
3098                                int planeb_clock, int sr_hdisplay, int unused,
3099                                int pixel_size)
3100 {
3101         struct drm_i915_private *dev_priv = dev->dev_private;
3102         const struct cxsr_latency *latency;
3103         u32 reg;
3104         unsigned long wm;
3105         int sr_clock;
3106
3107         latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
3108                                          dev_priv->fsb_freq, dev_priv->mem_freq);
3109         if (!latency) {
3110                 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
3111                 pineview_disable_cxsr(dev);
3112                 return;
3113         }
3114
3115         if (!planea_clock || !planeb_clock) {
3116                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3117
3118                 /* Display SR */
3119                 wm = intel_calculate_wm(sr_clock, &pineview_display_wm,
3120                                         pixel_size, latency->display_sr);
3121                 reg = I915_READ(DSPFW1);
3122                 reg &= ~DSPFW_SR_MASK;
3123                 reg |= wm << DSPFW_SR_SHIFT;
3124                 I915_WRITE(DSPFW1, reg);
3125                 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
3126
3127                 /* cursor SR */
3128                 wm = intel_calculate_wm(sr_clock, &pineview_cursor_wm,
3129                                         pixel_size, latency->cursor_sr);
3130                 reg = I915_READ(DSPFW3);
3131                 reg &= ~DSPFW_CURSOR_SR_MASK;
3132                 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
3133                 I915_WRITE(DSPFW3, reg);
3134
3135                 /* Display HPLL off SR */
3136                 wm = intel_calculate_wm(sr_clock, &pineview_display_hplloff_wm,
3137                                         pixel_size, latency->display_hpll_disable);
3138                 reg = I915_READ(DSPFW3);
3139                 reg &= ~DSPFW_HPLL_SR_MASK;
3140                 reg |= wm & DSPFW_HPLL_SR_MASK;
3141                 I915_WRITE(DSPFW3, reg);
3142
3143                 /* cursor HPLL off SR */
3144                 wm = intel_calculate_wm(sr_clock, &pineview_cursor_hplloff_wm,
3145                                         pixel_size, latency->cursor_hpll_disable);
3146                 reg = I915_READ(DSPFW3);
3147                 reg &= ~DSPFW_HPLL_CURSOR_MASK;
3148                 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
3149                 I915_WRITE(DSPFW3, reg);
3150                 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
3151
3152                 /* activate cxsr */
3153                 I915_WRITE(DSPFW3,
3154                            I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
3155                 DRM_DEBUG_KMS("Self-refresh is enabled\n");
3156         } else {
3157                 pineview_disable_cxsr(dev);
3158                 DRM_DEBUG_KMS("Self-refresh is disabled\n");
3159         }
3160 }
3161
3162 static void g4x_update_wm(struct drm_device *dev,  int planea_clock,
3163                           int planeb_clock, int sr_hdisplay, int sr_htotal,
3164                           int pixel_size)
3165 {
3166         struct drm_i915_private *dev_priv = dev->dev_private;
3167         int total_size, cacheline_size;
3168         int planea_wm, planeb_wm, cursora_wm, cursorb_wm, cursor_sr;
3169         struct intel_watermark_params planea_params, planeb_params;
3170         unsigned long line_time_us;
3171         int sr_clock, sr_entries = 0, entries_required;
3172
3173         /* Create copies of the base settings for each pipe */
3174         planea_params = planeb_params = g4x_wm_info;
3175
3176         /* Grab a couple of global values before we overwrite them */
3177         total_size = planea_params.fifo_size;
3178         cacheline_size = planea_params.cacheline_size;
3179
3180         /*
3181          * Note: we need to make sure we don't overflow for various clock &
3182          * latency values.
3183          * clocks go from a few thousand to several hundred thousand.
3184          * latency is usually a few thousand
3185          */
3186         entries_required = ((planea_clock / 1000) * pixel_size * latency_ns) /
3187                 1000;
3188         entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
3189         planea_wm = entries_required + planea_params.guard_size;
3190
3191         entries_required = ((planeb_clock / 1000) * pixel_size * latency_ns) /
3192                 1000;
3193         entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
3194         planeb_wm = entries_required + planeb_params.guard_size;
3195
3196         cursora_wm = cursorb_wm = 16;
3197         cursor_sr = 32;
3198
3199         DRM_DEBUG("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
3200
3201         /* Calc sr entries for one plane configs */
3202         if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
3203                 /* self-refresh has much higher latency */
3204                 static const int sr_latency_ns = 12000;
3205
3206                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3207                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3208
3209                 /* Use ns/us then divide to preserve precision */
3210                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3211                         pixel_size * sr_hdisplay;
3212                 sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);
3213
3214                 entries_required = (((sr_latency_ns / line_time_us) +
3215                                      1000) / 1000) * pixel_size * 64;
3216                 entries_required = DIV_ROUND_UP(entries_required,
3217                                                 g4x_cursor_wm_info.cacheline_size);
3218                 cursor_sr = entries_required + g4x_cursor_wm_info.guard_size;
3219
3220                 if (cursor_sr > g4x_cursor_wm_info.max_wm)
3221                         cursor_sr = g4x_cursor_wm_info.max_wm;
3222                 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
3223                               "cursor %d\n", sr_entries, cursor_sr);
3224
3225                 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
3226         } else {
3227                 /* Turn off self refresh if both pipes are enabled */
3228                 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3229                            & ~FW_BLC_SELF_EN);
3230         }
3231
3232         DRM_DEBUG("Setting FIFO watermarks - A: %d, B: %d, SR %d\n",
3233                   planea_wm, planeb_wm, sr_entries);
3234
3235         planea_wm &= 0x3f;
3236         planeb_wm &= 0x3f;
3237
3238         I915_WRITE(DSPFW1, (sr_entries << DSPFW_SR_SHIFT) |
3239                    (cursorb_wm << DSPFW_CURSORB_SHIFT) |
3240                    (planeb_wm << DSPFW_PLANEB_SHIFT) | planea_wm);
3241         I915_WRITE(DSPFW2, (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
3242                    (cursora_wm << DSPFW_CURSORA_SHIFT));
3243         /* HPLL off in SR has some issues on G4x... disable it */
3244         I915_WRITE(DSPFW3, (I915_READ(DSPFW3) & ~DSPFW_HPLL_SR_EN) |
3245                    (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
3246 }
3247
3248 static void i965_update_wm(struct drm_device *dev, int planea_clock,
3249                            int planeb_clock, int sr_hdisplay, int sr_htotal,
3250                            int pixel_size)
3251 {
3252         struct drm_i915_private *dev_priv = dev->dev_private;
3253         unsigned long line_time_us;
3254         int sr_clock, sr_entries, srwm = 1;
3255         int cursor_sr = 16;
3256
3257         /* Calc sr entries for one plane configs */
3258         if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
3259                 /* self-refresh has much higher latency */
3260                 static const int sr_latency_ns = 12000;
3261
3262                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3263                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3264
3265                 /* Use ns/us then divide to preserve precision */
3266                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3267                         pixel_size * sr_hdisplay;
3268                 sr_entries = DIV_ROUND_UP(sr_entries, I915_FIFO_LINE_SIZE);
3269                 DRM_DEBUG("self-refresh entries: %d\n", sr_entries);
3270                 srwm = I965_FIFO_SIZE - sr_entries;
3271                 if (srwm < 0)
3272                         srwm = 1;
3273                 srwm &= 0x1ff;
3274
3275                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3276                         pixel_size * 64;
3277                 sr_entries = DIV_ROUND_UP(sr_entries,
3278                                           i965_cursor_wm_info.cacheline_size);
3279                 cursor_sr = i965_cursor_wm_info.fifo_size -
3280                         (sr_entries + i965_cursor_wm_info.guard_size);
3281
3282                 if (cursor_sr > i965_cursor_wm_info.max_wm)
3283                         cursor_sr = i965_cursor_wm_info.max_wm;
3284
3285                 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
3286                               "cursor %d\n", srwm, cursor_sr);
3287
3288                 if (IS_CRESTLINE(dev))
3289                         I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
3290         } else {
3291                 /* Turn off self refresh if both pipes are enabled */
3292                 if (IS_CRESTLINE(dev))
3293                         I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3294                                    & ~FW_BLC_SELF_EN);
3295         }
3296
3297         DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
3298                       srwm);
3299
3300         /* 965 has limitations... */
3301         I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | (8 << 16) | (8 << 8) |
3302                    (8 << 0));
3303         I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
3304         /* update cursor SR watermark */
3305         I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
3306 }
3307
3308 static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
3309                            int planeb_clock, int sr_hdisplay, int sr_htotal,
3310                            int pixel_size)
3311 {
3312         struct drm_i915_private *dev_priv = dev->dev_private;
3313         uint32_t fwater_lo;
3314         uint32_t fwater_hi;
3315         int total_size, cacheline_size, cwm, srwm = 1;
3316         int planea_wm, planeb_wm;
3317         struct intel_watermark_params planea_params, planeb_params;
3318         unsigned long line_time_us;
3319         int sr_clock, sr_entries = 0;
3320
3321         /* Create copies of the base settings for each pipe */
3322         if (IS_CRESTLINE(dev) || IS_I945GM(dev))
3323                 planea_params = planeb_params = i945_wm_info;
3324         else if (!IS_GEN2(dev))
3325                 planea_params = planeb_params = i915_wm_info;
3326         else
3327                 planea_params = planeb_params = i855_wm_info;
3328
3329         /* Grab a couple of global values before we overwrite them */
3330         total_size = planea_params.fifo_size;
3331         cacheline_size = planea_params.cacheline_size;
3332
3333         /* Update per-plane FIFO sizes */
3334         planea_params.fifo_size = dev_priv->display.get_fifo_size(dev, 0);
3335         planeb_params.fifo_size = dev_priv->display.get_fifo_size(dev, 1);
3336
3337         planea_wm = intel_calculate_wm(planea_clock, &planea_params,
3338                                        pixel_size, latency_ns);
3339         planeb_wm = intel_calculate_wm(planeb_clock, &planeb_params,
3340                                        pixel_size, latency_ns);
3341         DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
3342
3343         /*
3344          * Overlay gets an aggressive default since video jitter is bad.
3345          */
3346         cwm = 2;
3347
3348         /* Calc sr entries for one plane configs */
3349         if (HAS_FW_BLC(dev) && sr_hdisplay &&
3350             (!planea_clock || !planeb_clock)) {
3351                 /* self-refresh has much higher latency */
3352                 static const int sr_latency_ns = 6000;
3353
3354                 sr_clock = planea_clock ? planea_clock : planeb_clock;
3355                 line_time_us = ((sr_htotal * 1000) / sr_clock);
3356
3357                 /* Use ns/us then divide to preserve precision */
3358                 sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
3359                         pixel_size * sr_hdisplay;
3360                 sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);
3361                 DRM_DEBUG_KMS("self-refresh entries: %d\n", sr_entries);
3362                 srwm = total_size - sr_entries;
3363                 if (srwm < 0)
3364                         srwm = 1;
3365
3366                 if (IS_I945G(dev) || IS_I945GM(dev))
3367                         I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
3368                 else if (IS_I915GM(dev)) {
3369                         /* 915M has a smaller SRWM field */
3370                         I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
3371                         I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
3372                 }
3373         } else {
3374                 /* Turn off self refresh if both pipes are enabled */
3375                 if (IS_I945G(dev) || IS_I945GM(dev)) {
3376                         I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
3377                                    & ~FW_BLC_SELF_EN);
3378                 } else if (IS_I915GM(dev)) {
3379                         I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
3380                 }
3381         }
3382
3383         DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
3384                       planea_wm, planeb_wm, cwm, srwm);
3385
3386         fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
3387         fwater_hi = (cwm & 0x1f);
3388
3389         /* Set request length to 8 cachelines per fetch */
3390         fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
3391         fwater_hi = fwater_hi | (1 << 8);
3392
3393         I915_WRITE(FW_BLC, fwater_lo);
3394         I915_WRITE(FW_BLC2, fwater_hi);
3395 }
3396
3397 static void i830_update_wm(struct drm_device *dev, int planea_clock, int unused,
3398                            int unused2, int unused3, int pixel_size)
3399 {
3400         struct drm_i915_private *dev_priv = dev->dev_private;
3401         uint32_t fwater_lo = I915_READ(FW_BLC) & ~0xfff;
3402         int planea_wm;
3403
3404         i830_wm_info.fifo_size = dev_priv->display.get_fifo_size(dev, 0);
3405
3406         planea_wm = intel_calculate_wm(planea_clock, &i830_wm_info,
3407                                        pixel_size, latency_ns);
3408         fwater_lo |= (3<<8) | planea_wm;
3409
3410         DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
3411
3412         I915_WRITE(FW_BLC, fwater_lo);
3413 }
3414
3415 #define ILK_LP0_PLANE_LATENCY           700
3416 #define ILK_LP0_CURSOR_LATENCY          1300
3417
3418 static bool ironlake_compute_wm0(struct drm_device *dev,
3419                                  int pipe,
3420                                  const struct intel_watermark_params *display,
3421                                  int display_latency_ns,
3422                                  const struct intel_watermark_params *cursor,
3423                                  int cursor_latency_ns,
3424                                  int *plane_wm,
3425                                  int *cursor_wm)
3426 {
3427         struct drm_crtc *crtc;
3428         int htotal, hdisplay, clock, pixel_size;
3429         int line_time_us, line_count;
3430         int entries, tlb_miss;
3431
3432         crtc = intel_get_crtc_for_pipe(dev, pipe);
3433         if (crtc->fb == NULL || !crtc->enabled)
3434                 return false;
3435
3436         htotal = crtc->mode.htotal;
3437         hdisplay = crtc->mode.hdisplay;
3438         clock = crtc->mode.clock;
3439         pixel_size = crtc->fb->bits_per_pixel / 8;
3440
3441         /* Use the small buffer method to calculate plane watermark */
3442         entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
3443         tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
3444         if (tlb_miss > 0)
3445                 entries += tlb_miss;
3446         entries = DIV_ROUND_UP(entries, display->cacheline_size);
3447         *plane_wm = entries + display->guard_size;
3448         if (*plane_wm > (int)display->max_wm)
3449                 *plane_wm = display->max_wm;
3450
3451         /* Use the large buffer method to calculate cursor watermark */
3452         line_time_us = ((htotal * 1000) / clock);
3453         line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
3454         entries = line_count * 64 * pixel_size;
3455         tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
3456         if (tlb_miss > 0)
3457                 entries += tlb_miss;
3458         entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
3459         *cursor_wm = entries + cursor->guard_size;
3460         if (*cursor_wm > (int)cursor->max_wm)
3461                 *cursor_wm = (int)cursor->max_wm;
3462
3463         return true;
3464 }
3465
3466 /*
3467  * Check the wm result.
3468  *
3469  * If any calculated watermark values is larger than the maximum value that
3470  * can be programmed into the associated watermark register, that watermark
3471  * must be disabled.
3472  */
3473 static bool ironlake_check_srwm(struct drm_device *dev, int level,
3474                                 int fbc_wm, int display_wm, int cursor_wm,
3475                                 const struct intel_watermark_params *display,
3476                                 const struct intel_watermark_params *cursor)
3477 {
3478         struct drm_i915_private *dev_priv = dev->dev_private;
3479
3480         DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
3481                       " cursor %d\n", level, display_wm, fbc_wm, cursor_wm);
3482
3483         if (fbc_wm > SNB_FBC_MAX_SRWM) {
3484                 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
3485                               fbc_wm, SNB_FBC_MAX_SRWM, level);
3486
3487                 /* fbc has it's own way to disable FBC WM */
3488                 I915_WRITE(DISP_ARB_CTL,
3489                            I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
3490                 return false;
3491         }
3492
3493         if (display_wm > display->max_wm) {
3494                 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
3495                               display_wm, SNB_DISPLAY_MAX_SRWM, level);
3496                 return false;
3497         }
3498
3499         if (cursor_wm > cursor->max_wm) {
3500                 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
3501                               cursor_wm, SNB_CURSOR_MAX_SRWM, level);
3502                 return false;
3503         }
3504
3505         if (!(fbc_wm || display_wm || cursor_wm)) {
3506                 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
3507                 return false;
3508         }
3509
3510         return true;
3511 }
3512
3513 /*
3514  * Compute watermark values of WM[1-3],
3515  */
3516 static bool ironlake_compute_srwm(struct drm_device *dev, int level,
3517                                   int hdisplay, int htotal,
3518                                   int pixel_size, int clock, int latency_ns,
3519                                   const struct intel_watermark_params *display,
3520                                   const struct intel_watermark_params *cursor,
3521                                   int *fbc_wm, int *display_wm, int *cursor_wm)
3522 {
3523
3524         unsigned long line_time_us;
3525         int line_count, line_size;
3526         int small, large;
3527         int entries;
3528
3529         if (!latency_ns) {
3530                 *fbc_wm = *display_wm = *cursor_wm = 0;
3531                 return false;
3532         }
3533
3534         line_time_us = (htotal * 1000) / clock;
3535         line_count = (latency_ns / line_time_us + 1000) / 1000;
3536         line_size = hdisplay * pixel_size;
3537
3538         /* Use the minimum of the small and large buffer method for primary */
3539         small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
3540         large = line_count * line_size;
3541
3542         entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
3543         *display_wm = entries + display->guard_size;
3544
3545         /*
3546          * Spec says:
3547          * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
3548          */
3549         *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2;
3550
3551         /* calculate the self-refresh watermark for display cursor */
3552         entries = line_count * pixel_size * 64;
3553         entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
3554         *cursor_wm = entries + cursor->guard_size;
3555
3556         return ironlake_check_srwm(dev, level,
3557                                    *fbc_wm, *display_wm, *cursor_wm,
3558                                    display, cursor);
3559 }
3560
3561 static void ironlake_update_wm(struct drm_device *dev,
3562                                int planea_clock, int planeb_clock,
3563                                int hdisplay, int htotal,
3564                                int pixel_size)
3565 {
3566         struct drm_i915_private *dev_priv = dev->dev_private;
3567         int fbc_wm, plane_wm, cursor_wm, enabled;
3568         int clock;
3569
3570         enabled = 0;
3571         if (ironlake_compute_wm0(dev, 0,
3572                                  &ironlake_display_wm_info,
3573                                  ILK_LP0_PLANE_LATENCY,
3574                                  &ironlake_cursor_wm_info,
3575                                  ILK_LP0_CURSOR_LATENCY,
3576                                  &plane_wm, &cursor_wm)) {
3577                 I915_WRITE(WM0_PIPEA_ILK,
3578                            (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
3579                 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
3580                               " plane %d, " "cursor: %d\n",
3581                               plane_wm, cursor_wm);
3582                 enabled++;
3583         }
3584
3585         if (ironlake_compute_wm0(dev, 1,
3586                                  &ironlake_display_wm_info,
3587                                  ILK_LP0_PLANE_LATENCY,
3588                                  &ironlake_cursor_wm_info,
3589                                  ILK_LP0_CURSOR_LATENCY,
3590                                  &plane_wm, &cursor_wm)) {
3591                 I915_WRITE(WM0_PIPEB_ILK,
3592                            (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
3593                 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
3594                               " plane %d, cursor: %d\n",
3595                               plane_wm, cursor_wm);
3596                 enabled++;
3597         }
3598
3599         /*
3600          * Calculate and update the self-refresh watermark only when one
3601          * display plane is used.
3602          */
3603         I915_WRITE(WM3_LP_ILK, 0);
3604         I915_WRITE(WM2_LP_ILK, 0);
3605         I915_WRITE(WM1_LP_ILK, 0);
3606
3607         if (enabled != 1)
3608                 return;
3609
3610         clock = planea_clock ? planea_clock : planeb_clock;
3611
3612         /* WM1 */
3613         if (!ironlake_compute_srwm(dev, 1, hdisplay, htotal, pixel_size,
3614                                    clock, ILK_READ_WM1_LATENCY() * 500,
3615                                    &ironlake_display_srwm_info,
3616                                    &ironlake_cursor_srwm_info,
3617                                    &fbc_wm, &plane_wm, &cursor_wm))
3618                 return;
3619
3620         I915_WRITE(WM1_LP_ILK,
3621                    WM1_LP_SR_EN |
3622                    (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
3623                    (fbc_wm << WM1_LP_FBC_SHIFT) |
3624                    (plane_wm << WM1_LP_SR_SHIFT) |
3625                    cursor_wm);
3626
3627         /* WM2 */
3628         if (!ironlake_compute_srwm(dev, 2, hdisplay, htotal, pixel_size,
3629                                    clock, ILK_READ_WM2_LATENCY() * 500,
3630                                    &ironlake_display_srwm_info,
3631                                    &ironlake_cursor_srwm_info,
3632                                    &fbc_wm, &plane_wm, &cursor_wm))
3633                 return;
3634
3635         I915_WRITE(WM2_LP_ILK,
3636                    WM2_LP_EN |
3637                    (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
3638                    (fbc_wm << WM1_LP_FBC_SHIFT) |
3639                    (plane_wm << WM1_LP_SR_SHIFT) |
3640                    cursor_wm);
3641
3642         /*
3643          * WM3 is unsupported on ILK, probably because we don't have latency
3644          * data for that power state
3645          */
3646 }
3647
3648 static void sandybridge_update_wm(struct drm_device *dev,
3649                                int planea_clock, int planeb_clock,
3650                                int hdisplay, int htotal,
3651                                int pixel_size)
3652 {
3653         struct drm_i915_private *dev_priv = dev->dev_private;
3654         int latency = SNB_READ_WM0_LATENCY() * 100;     /* In unit 0.1us */
3655         int fbc_wm, plane_wm, cursor_wm, enabled;
3656         int clock;
3657
3658         enabled = 0;
3659         if (ironlake_compute_wm0(dev, 0,
3660                                  &sandybridge_display_wm_info, latency,
3661                                  &sandybridge_cursor_wm_info, latency,
3662                                  &plane_wm, &cursor_wm)) {
3663                 I915_WRITE(WM0_PIPEA_ILK,
3664                            (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
3665                 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
3666                               " plane %d, " "cursor: %d\n",
3667                               plane_wm, cursor_wm);
3668                 enabled++;
3669         }
3670
3671         if (ironlake_compute_wm0(dev, 1,
3672                                  &sandybridge_display_wm_info, latency,
3673                                  &sandybridge_cursor_wm_info, latency,
3674                                  &plane_wm, &cursor_wm)) {
3675                 I915_WRITE(WM0_PIPEB_ILK,
3676                            (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
3677                 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
3678                               " plane %d, cursor: %d\n",
3679                               plane_wm, cursor_wm);
3680                 enabled++;
3681         }
3682
3683         /*
3684          * Calculate and update the self-refresh watermark only when one
3685          * display plane is used.
3686          *
3687          * SNB support 3 levels of watermark.
3688          *
3689          * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
3690          * and disabled in the descending order
3691          *
3692          */
3693         I915_WRITE(WM3_LP_ILK, 0);
3694         I915_WRITE(WM2_LP_ILK, 0);
3695         I915_WRITE(WM1_LP_ILK, 0);
3696
3697         if (enabled != 1)
3698                 return;
3699
3700         clock = planea_clock ? planea_clock : planeb_clock;
3701
3702         /* WM1 */
3703         if (!ironlake_compute_srwm(dev, 1, hdisplay, htotal, pixel_size,
3704                                    clock, SNB_READ_WM1_LATENCY() * 500,
3705                                    &sandybridge_display_srwm_info,
3706                                    &sandybridge_cursor_srwm_info,
3707                                    &fbc_wm, &plane_wm, &cursor_wm))
3708                 return;
3709
3710         I915_WRITE(WM1_LP_ILK,
3711                    WM1_LP_SR_EN |
3712                    (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
3713                    (fbc_wm << WM1_LP_FBC_SHIFT) |
3714                    (plane_wm << WM1_LP_SR_SHIFT) |
3715                    cursor_wm);
3716
3717         /* WM2 */
3718         if (!ironlake_compute_srwm(dev, 2,
3719                                    hdisplay, htotal, pixel_size,
3720                                    clock, SNB_READ_WM2_LATENCY() * 500,
3721                                    &sandybridge_display_srwm_info,
3722                                    &sandybridge_cursor_srwm_info,
3723                                    &fbc_wm, &plane_wm, &cursor_wm))
3724                 return;
3725
3726         I915_WRITE(WM2_LP_ILK,
3727                    WM2_LP_EN |
3728                    (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
3729                    (fbc_wm << WM1_LP_FBC_SHIFT) |
3730                    (plane_wm << WM1_LP_SR_SHIFT) |
3731                    cursor_wm);
3732
3733         /* WM3 */
3734         if (!ironlake_compute_srwm(dev, 3,
3735                                    hdisplay, htotal, pixel_size,
3736                                    clock, SNB_READ_WM3_LATENCY() * 500,
3737                                    &sandybridge_display_srwm_info,
3738                                    &sandybridge_cursor_srwm_info,
3739                                    &fbc_wm, &plane_wm, &cursor_wm))
3740                 return;
3741
3742         I915_WRITE(WM3_LP_ILK,
3743                    WM3_LP_EN |
3744                    (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
3745                    (fbc_wm << WM1_LP_FBC_SHIFT) |
3746                    (plane_wm << WM1_LP_SR_SHIFT) |
3747                    cursor_wm);
3748 }
3749
3750 /**
3751  * intel_update_watermarks - update FIFO watermark values based on current modes
3752  *
3753  * Calculate watermark values for the various WM regs based on current mode
3754  * and plane configuration.
3755  *
3756  * There are several cases to deal with here:
3757  *   - normal (i.e. non-self-refresh)
3758  *   - self-refresh (SR) mode
3759  *   - lines are large relative to FIFO size (buffer can hold up to 2)
3760  *   - lines are small relative to FIFO size (buffer can hold more than 2
3761  *     lines), so need to account for TLB latency
3762  *
3763  *   The normal calculation is:
3764  *     watermark = dotclock * bytes per pixel * latency
3765  *   where latency is platform & configuration dependent (we assume pessimal
3766  *   values here).
3767  *
3768  *   The SR calculation is:
3769  *     watermark = (trunc(latency/line time)+1) * surface width *
3770  *       bytes per pixel
3771  *   where
3772  *     line time = htotal / dotclock
3773  *     surface width = hdisplay for normal plane and 64 for cursor
3774  *   and latency is assumed to be high, as above.
3775  *
3776  * The final value programmed to the register should always be rounded up,
3777  * and include an extra 2 entries to account for clock crossings.
3778  *
3779  * We don't use the sprite, so we can ignore that.  And on Crestline we have
3780  * to set the non-SR watermarks to 8.
3781  */
3782 static void intel_update_watermarks(struct drm_device *dev)
3783 {
3784         struct drm_i915_private *dev_priv = dev->dev_private;
3785         struct drm_crtc *crtc;
3786         int sr_hdisplay = 0;
3787         unsigned long planea_clock = 0, planeb_clock = 0, sr_clock = 0;
3788         int enabled = 0, pixel_size = 0;
3789         int sr_htotal = 0;
3790
3791         if (!dev_priv->display.update_wm)
3792                 return;
3793
3794         /* Get the clock config from both planes */
3795         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3796                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3797                 if (intel_crtc->active) {
3798                         enabled++;
3799                         if (intel_crtc->plane == 0) {
3800                                 DRM_DEBUG_KMS("plane A (pipe %d) clock: %d\n",
3801                                               intel_crtc->pipe, crtc->mode.clock);
3802                                 planea_clock = crtc->mode.clock;
3803                         } else {
3804                                 DRM_DEBUG_KMS("plane B (pipe %d) clock: %d\n",
3805                                               intel_crtc->pipe, crtc->mode.clock);
3806                                 planeb_clock = crtc->mode.clock;
3807                         }
3808                         sr_hdisplay = crtc->mode.hdisplay;
3809                         sr_clock = crtc->mode.clock;
3810                         sr_htotal = crtc->mode.htotal;
3811                         if (crtc->fb)
3812                                 pixel_size = crtc->fb->bits_per_pixel / 8;
3813                         else
3814                                 pixel_size = 4; /* by default */
3815                 }
3816         }
3817
3818         if (enabled <= 0)
3819                 return;
3820
3821         dev_priv->display.update_wm(dev, planea_clock, planeb_clock,
3822                                     sr_hdisplay, sr_htotal, pixel_size);
3823 }
3824
3825 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
3826 {
3827         return dev_priv->lvds_use_ssc && i915_panel_use_ssc;
3828 }
3829
3830 static int intel_crtc_mode_set(struct drm_crtc *crtc,
3831                                struct drm_display_mode *mode,
3832                                struct drm_display_mode *adjusted_mode,
3833                                int x, int y,
3834                                struct drm_framebuffer *old_fb)
3835 {
3836         struct drm_device *dev = crtc->dev;
3837         struct drm_i915_private *dev_priv = dev->dev_private;
3838         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3839         int pipe = intel_crtc->pipe;
3840         int plane = intel_crtc->plane;
3841         u32 fp_reg, dpll_reg;
3842         int refclk, num_connectors = 0;
3843         intel_clock_t clock, reduced_clock;
3844         u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
3845         bool ok, has_reduced_clock = false, is_sdvo = false, is_dvo = false;
3846         bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
3847         struct intel_encoder *has_edp_encoder = NULL;
3848         struct drm_mode_config *mode_config = &dev->mode_config;
3849         struct intel_encoder *encoder;
3850         const intel_limit_t *limit;
3851         int ret;
3852         struct fdi_m_n m_n = {0};
3853         u32 reg, temp;
3854         int target_clock;
3855
3856         drm_vblank_pre_modeset(dev, pipe);
3857
3858         list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
3859                 if (encoder->base.crtc != crtc)
3860                         continue;
3861
3862                 switch (encoder->type) {
3863                 case INTEL_OUTPUT_LVDS:
3864                         is_lvds = true;
3865                         break;
3866                 case INTEL_OUTPUT_SDVO:
3867                 case INTEL_OUTPUT_HDMI:
3868                         is_sdvo = true;
3869                         if (encoder->needs_tv_clock)
3870                                 is_tv = true;
3871                         break;
3872                 case INTEL_OUTPUT_DVO:
3873                         is_dvo = true;
3874                         break;
3875                 case INTEL_OUTPUT_TVOUT:
3876                         is_tv = true;
3877                         break;
3878                 case INTEL_OUTPUT_ANALOG:
3879                         is_crt = true;
3880                         break;
3881                 case INTEL_OUTPUT_DISPLAYPORT:
3882                         is_dp = true;
3883                         break;
3884                 case INTEL_OUTPUT_EDP:
3885                         has_edp_encoder = encoder;
3886                         break;
3887                 }
3888
3889                 num_connectors++;
3890         }
3891
3892         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
3893                 refclk = dev_priv->lvds_ssc_freq * 1000;
3894                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
3895                               refclk / 1000);
3896         } else if (!IS_GEN2(dev)) {
3897                 refclk = 96000;
3898                 if (HAS_PCH_SPLIT(dev) &&
3899                     (!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)))
3900                         refclk = 120000; /* 120Mhz refclk */
3901         } else {
3902                 refclk = 48000;
3903         }
3904
3905         /*
3906          * Returns a set of divisors for the desired target clock with the given
3907          * refclk, or FALSE.  The returned values represent the clock equation:
3908          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
3909          */
3910         limit = intel_limit(crtc, refclk);
3911         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
3912         if (!ok) {
3913                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
3914                 drm_vblank_post_modeset(dev, pipe);
3915                 return -EINVAL;
3916         }
3917
3918         /* Ensure that the cursor is valid for the new mode before changing... */
3919         intel_crtc_update_cursor(crtc, true);
3920
3921         if (is_lvds && dev_priv->lvds_downclock_avail) {
3922                 has_reduced_clock = limit->find_pll(limit, crtc,
3923                                                     dev_priv->lvds_downclock,
3924                                                     refclk,
3925                                                     &reduced_clock);
3926                 if (has_reduced_clock && (clock.p != reduced_clock.p)) {
3927                         /*
3928                          * If the different P is found, it means that we can't
3929                          * switch the display clock by using the FP0/FP1.
3930                          * In such case we will disable the LVDS downclock
3931                          * feature.
3932                          */
3933                         DRM_DEBUG_KMS("Different P is found for "
3934                                       "LVDS clock/downclock\n");
3935                         has_reduced_clock = 0;
3936                 }
3937         }
3938         /* SDVO TV has fixed PLL values depend on its clock range,
3939            this mirrors vbios setting. */
3940         if (is_sdvo && is_tv) {
3941                 if (adjusted_mode->clock >= 100000
3942                     && adjusted_mode->clock < 140500) {
3943                         clock.p1 = 2;
3944                         clock.p2 = 10;
3945                         clock.n = 3;
3946                         clock.m1 = 16;
3947                         clock.m2 = 8;
3948                 } else if (adjusted_mode->clock >= 140500
3949                            && adjusted_mode->clock <= 200000) {
3950                         clock.p1 = 1;
3951                         clock.p2 = 10;
3952                         clock.n = 6;
3953                         clock.m1 = 12;
3954                         clock.m2 = 8;
3955                 }
3956         }
3957
3958         /* FDI link */
3959         if (HAS_PCH_SPLIT(dev)) {
3960                 int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
3961                 int lane = 0, link_bw, bpp;
3962                 /* CPU eDP doesn't require FDI link, so just set DP M/N
3963                    according to current link config */
3964                 if (has_edp_encoder && !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
3965                         target_clock = mode->clock;
3966                         intel_edp_link_config(has_edp_encoder,
3967                                               &lane, &link_bw);
3968                 } else {
3969                         /* [e]DP over FDI requires target mode clock
3970                            instead of link clock */
3971                         if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
3972                                 target_clock = mode->clock;
3973                         else
3974                                 target_clock = adjusted_mode->clock;
3975
3976                         /* FDI is a binary signal running at ~2.7GHz, encoding
3977                          * each output octet as 10 bits. The actual frequency
3978                          * is stored as a divider into a 100MHz clock, and the
3979                          * mode pixel clock is stored in units of 1KHz.
3980                          * Hence the bw of each lane in terms of the mode signal
3981                          * is:
3982                          */
3983                         link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
3984                 }
3985
3986                 /* determine panel color depth */
3987                 temp = I915_READ(PIPECONF(pipe));
3988                 temp &= ~PIPE_BPC_MASK;
3989                 if (is_lvds) {
3990                         /* the BPC will be 6 if it is 18-bit LVDS panel */
3991                         if ((I915_READ(PCH_LVDS) & LVDS_A3_POWER_MASK) == LVDS_A3_POWER_UP)
3992                                 temp |= PIPE_8BPC;
3993                         else
3994                                 temp |= PIPE_6BPC;
3995                 } else if (has_edp_encoder) {
3996                         switch (dev_priv->edp.bpp/3) {
3997                         case 8:
3998                                 temp |= PIPE_8BPC;
3999                                 break;
4000                         case 10:
4001                                 temp |= PIPE_10BPC;
4002                                 break;
4003                         case 6:
4004                                 temp |= PIPE_6BPC;
4005                                 break;
4006                         case 12:
4007                                 temp |= PIPE_12BPC;
4008                                 break;
4009                         }
4010                 } else
4011                         temp |= PIPE_8BPC;
4012                 I915_WRITE(PIPECONF(pipe), temp);
4013
4014                 switch (temp & PIPE_BPC_MASK) {
4015                 case PIPE_8BPC:
4016                         bpp = 24;
4017                         break;
4018                 case PIPE_10BPC:
4019                         bpp = 30;
4020                         break;
4021                 case PIPE_6BPC:
4022                         bpp = 18;
4023                         break;
4024                 case PIPE_12BPC:
4025                         bpp = 36;
4026                         break;
4027                 default:
4028                         DRM_ERROR("unknown pipe bpc value\n");
4029                         bpp = 24;
4030                 }
4031
4032                 if (!lane) {
4033                         /*
4034                          * Account for spread spectrum to avoid
4035                          * oversubscribing the link. Max center spread
4036                          * is 2.5%; use 5% for safety's sake.
4037                          */
4038                         u32 bps = target_clock * bpp * 21 / 20;
4039                         lane = bps / (link_bw * 8) + 1;
4040                 }
4041
4042                 intel_crtc->fdi_lanes = lane;
4043
4044                 if (pixel_multiplier > 1)
4045                         link_bw *= pixel_multiplier;
4046                 ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n);
4047         }
4048
4049         /* Ironlake: try to setup display ref clock before DPLL
4050          * enabling. This is only under driver's control after
4051          * PCH B stepping, previous chipset stepping should be
4052          * ignoring this setting.
4053          */
4054         if (HAS_PCH_SPLIT(dev)) {
4055                 temp = I915_READ(PCH_DREF_CONTROL);
4056                 /* Always enable nonspread source */
4057                 temp &= ~DREF_NONSPREAD_SOURCE_MASK;
4058                 temp |= DREF_NONSPREAD_SOURCE_ENABLE;
4059                 temp &= ~DREF_SSC_SOURCE_MASK;
4060                 temp |= DREF_SSC_SOURCE_ENABLE;
4061                 I915_WRITE(PCH_DREF_CONTROL, temp);
4062
4063                 POSTING_READ(PCH_DREF_CONTROL);
4064                 udelay(200);
4065
4066                 if (has_edp_encoder) {
4067                         if (intel_panel_use_ssc(dev_priv)) {
4068                                 temp |= DREF_SSC1_ENABLE;
4069                                 I915_WRITE(PCH_DREF_CONTROL, temp);
4070
4071                                 POSTING_READ(PCH_DREF_CONTROL);
4072                                 udelay(200);
4073                         }
4074                         temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4075
4076                         /* Enable CPU source on CPU attached eDP */
4077                         if (!intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
4078                                 if (intel_panel_use_ssc(dev_priv))
4079                                         temp |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4080                                 else
4081                                         temp |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4082                         } else {
4083                                 /* Enable SSC on PCH eDP if needed */
4084                                 if (intel_panel_use_ssc(dev_priv)) {
4085                                         DRM_ERROR("enabling SSC on PCH\n");
4086                                         temp |= DREF_SUPERSPREAD_SOURCE_ENABLE;
4087                                 }
4088                         }
4089                         I915_WRITE(PCH_DREF_CONTROL, temp);
4090                         POSTING_READ(PCH_DREF_CONTROL);
4091                         udelay(200);
4092                 }
4093         }
4094
4095         if (IS_PINEVIEW(dev)) {
4096                 fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
4097                 if (has_reduced_clock)
4098                         fp2 = (1 << reduced_clock.n) << 16 |
4099                                 reduced_clock.m1 << 8 | reduced_clock.m2;
4100         } else {
4101                 fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
4102                 if (has_reduced_clock)
4103                         fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
4104                                 reduced_clock.m2;
4105         }
4106
4107         /* Enable autotuning of the PLL clock (if permissible) */
4108         if (HAS_PCH_SPLIT(dev)) {
4109                 int factor = 21;
4110
4111                 if (is_lvds) {
4112                         if ((intel_panel_use_ssc(dev_priv) &&
4113                              dev_priv->lvds_ssc_freq == 100) ||
4114                             (I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
4115                                 factor = 25;
4116                 } else if (is_sdvo && is_tv)
4117                         factor = 20;
4118
4119                 if (clock.m1 < factor * clock.n)
4120                         fp |= FP_CB_TUNE;
4121         }
4122
4123         dpll = 0;
4124         if (!HAS_PCH_SPLIT(dev))
4125                 dpll = DPLL_VGA_MODE_DIS;
4126
4127         if (!IS_GEN2(dev)) {
4128                 if (is_lvds)
4129                         dpll |= DPLLB_MODE_LVDS;
4130                 else
4131                         dpll |= DPLLB_MODE_DAC_SERIAL;
4132                 if (is_sdvo) {
4133                         int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
4134                         if (pixel_multiplier > 1) {
4135                                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
4136                                         dpll |= (pixel_multiplier - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
4137                                 else if (HAS_PCH_SPLIT(dev))
4138                                         dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
4139                         }
4140                         dpll |= DPLL_DVO_HIGH_SPEED;
4141                 }
4142                 if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
4143                         dpll |= DPLL_DVO_HIGH_SPEED;
4144
4145                 /* compute bitmask from p1 value */
4146                 if (IS_PINEVIEW(dev))
4147                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4148                 else {
4149                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4150                         /* also FPA1 */
4151                         if (HAS_PCH_SPLIT(dev))
4152                                 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4153                         if (IS_G4X(dev) && has_reduced_clock)
4154                                 dpll |= (1 << (reduced_clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4155                 }
4156                 switch (clock.p2) {
4157                 case 5:
4158                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4159                         break;
4160                 case 7:
4161                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4162                         break;
4163                 case 10:
4164                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4165                         break;
4166                 case 14:
4167                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4168                         break;
4169                 }
4170                 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
4171                         dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4172         } else {
4173                 if (is_lvds) {
4174                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4175                 } else {
4176                         if (clock.p1 == 2)
4177                                 dpll |= PLL_P1_DIVIDE_BY_TWO;
4178                         else
4179                                 dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4180                         if (clock.p2 == 4)
4181                                 dpll |= PLL_P2_DIVIDE_BY_4;
4182                 }
4183         }
4184
4185         if (is_sdvo && is_tv)
4186                 dpll |= PLL_REF_INPUT_TVCLKINBC;
4187         else if (is_tv)
4188                 /* XXX: just matching BIOS for now */
4189                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
4190                 dpll |= 3;
4191         else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4192                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4193         else
4194                 dpll |= PLL_REF_INPUT_DREFCLK;
4195
4196         /* setup pipeconf */
4197         pipeconf = I915_READ(PIPECONF(pipe));
4198
4199         /* Set up the display plane register */
4200         dspcntr = DISPPLANE_GAMMA_ENABLE;
4201
4202         /* Ironlake's plane is forced to pipe, bit 24 is to
4203            enable color space conversion */
4204         if (!HAS_PCH_SPLIT(dev)) {
4205                 if (pipe == 0)
4206                         dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
4207                 else
4208                         dspcntr |= DISPPLANE_SEL_PIPE_B;
4209         }
4210
4211         if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
4212                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
4213                  * core speed.
4214                  *
4215                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
4216                  * pipe == 0 check?
4217                  */
4218                 if (mode->clock >
4219                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
4220                         pipeconf |= PIPECONF_DOUBLE_WIDE;
4221                 else
4222                         pipeconf &= ~PIPECONF_DOUBLE_WIDE;
4223         }
4224
4225         if (!HAS_PCH_SPLIT(dev)) {
4226                 dspcntr |= DISPLAY_PLANE_ENABLE;
4227                 pipeconf |= PIPECONF_ENABLE;
4228                 dpll |= DPLL_VCO_ENABLE;
4229         }
4230
4231         DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
4232         drm_mode_debug_printmodeline(mode);
4233
4234         /* assign to Ironlake registers */
4235         if (HAS_PCH_SPLIT(dev)) {
4236                 fp_reg = PCH_FP0(pipe);
4237                 dpll_reg = PCH_DPLL(pipe);
4238         } else {
4239                 fp_reg = FP0(pipe);
4240                 dpll_reg = DPLL(pipe);
4241         }
4242
4243         /* PCH eDP needs FDI, but CPU eDP does not */
4244         if (!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
4245                 I915_WRITE(fp_reg, fp);
4246                 I915_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);
4247
4248                 POSTING_READ(dpll_reg);
4249                 udelay(150);
4250         }
4251
4252         /* enable transcoder DPLL */
4253         if (HAS_PCH_CPT(dev)) {
4254                 temp = I915_READ(PCH_DPLL_SEL);
4255                 if (pipe == 0)
4256                         temp |= TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL;
4257                 else
4258                         temp |= TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL;
4259                 I915_WRITE(PCH_DPLL_SEL, temp);
4260
4261                 POSTING_READ(PCH_DPLL_SEL);
4262                 udelay(150);
4263         }
4264
4265         /* The LVDS pin pair needs to be on before the DPLLs are enabled.
4266          * This is an exception to the general rule that mode_set doesn't turn
4267          * things on.
4268          */
4269         if (is_lvds) {
4270                 reg = LVDS;
4271                 if (HAS_PCH_SPLIT(dev))
4272                         reg = PCH_LVDS;
4273
4274                 temp = I915_READ(reg);
4275                 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
4276                 if (pipe == 1) {
4277                         if (HAS_PCH_CPT(dev))
4278                                 temp |= PORT_TRANS_B_SEL_CPT;
4279                         else
4280                                 temp |= LVDS_PIPEB_SELECT;
4281                 } else {
4282                         if (HAS_PCH_CPT(dev))
4283                                 temp &= ~PORT_TRANS_SEL_MASK;
4284                         else
4285                                 temp &= ~LVDS_PIPEB_SELECT;
4286                 }
4287                 /* set the corresponsding LVDS_BORDER bit */
4288                 temp |= dev_priv->lvds_border_bits;
4289                 /* Set the B0-B3 data pairs corresponding to whether we're going to
4290                  * set the DPLLs for dual-channel mode or not.
4291                  */
4292                 if (clock.p2 == 7)
4293                         temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
4294                 else
4295                         temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
4296
4297                 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
4298                  * appropriately here, but we need to look more thoroughly into how
4299                  * panels behave in the two modes.
4300                  */
4301                 /* set the dithering flag on non-PCH LVDS as needed */
4302                 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
4303                         if (dev_priv->lvds_dither)
4304                                 temp |= LVDS_ENABLE_DITHER;
4305                         else
4306                                 temp &= ~LVDS_ENABLE_DITHER;
4307                 }
4308                 I915_WRITE(reg, temp);
4309         }
4310
4311         /* set the dithering flag and clear for anything other than a panel. */
4312         if (HAS_PCH_SPLIT(dev)) {
4313                 pipeconf &= ~PIPECONF_DITHER_EN;
4314                 pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
4315                 if (dev_priv->lvds_dither && (is_lvds || has_edp_encoder)) {
4316                         pipeconf |= PIPECONF_DITHER_EN;
4317                         pipeconf |= PIPECONF_DITHER_TYPE_ST1;
4318                 }
4319         }
4320
4321         if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
4322                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
4323         } else if (HAS_PCH_SPLIT(dev)) {
4324                 /* For non-DP output, clear any trans DP clock recovery setting.*/
4325                 if (pipe == 0) {
4326                         I915_WRITE(TRANSA_DATA_M1, 0);
4327                         I915_WRITE(TRANSA_DATA_N1, 0);
4328                         I915_WRITE(TRANSA_DP_LINK_M1, 0);
4329                         I915_WRITE(TRANSA_DP_LINK_N1, 0);
4330                 } else {
4331                         I915_WRITE(TRANSB_DATA_M1, 0);
4332                         I915_WRITE(TRANSB_DATA_N1, 0);
4333                         I915_WRITE(TRANSB_DP_LINK_M1, 0);
4334                         I915_WRITE(TRANSB_DP_LINK_N1, 0);
4335                 }
4336         }
4337
4338         if (!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
4339                 I915_WRITE(dpll_reg, dpll);
4340
4341                 /* Wait for the clocks to stabilize. */
4342                 POSTING_READ(dpll_reg);
4343                 udelay(150);
4344
4345                 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
4346                         temp = 0;
4347                         if (is_sdvo) {
4348                                 temp = intel_mode_get_pixel_multiplier(adjusted_mode);
4349                                 if (temp > 1)
4350                                         temp = (temp - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4351                                 else
4352                                         temp = 0;
4353                         }
4354                         I915_WRITE(DPLL_MD(pipe), temp);
4355                 } else {
4356                         /* The pixel multiplier can only be updated once the
4357                          * DPLL is enabled and the clocks are stable.
4358                          *
4359                          * So write it again.
4360                          */
4361                         I915_WRITE(dpll_reg, dpll);
4362                 }
4363         }
4364
4365         intel_crtc->lowfreq_avail = false;
4366         if (is_lvds && has_reduced_clock && i915_powersave) {
4367                 I915_WRITE(fp_reg + 4, fp2);
4368                 intel_crtc->lowfreq_avail = true;
4369                 if (HAS_PIPE_CXSR(dev)) {
4370                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4371                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4372                 }
4373         } else {
4374                 I915_WRITE(fp_reg + 4, fp);
4375                 if (HAS_PIPE_CXSR(dev)) {
4376                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4377                         pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
4378                 }
4379         }
4380
4381         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4382                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4383                 /* the chip adds 2 halflines automatically */
4384                 adjusted_mode->crtc_vdisplay -= 1;
4385                 adjusted_mode->crtc_vtotal -= 1;
4386                 adjusted_mode->crtc_vblank_start -= 1;
4387                 adjusted_mode->crtc_vblank_end -= 1;
4388                 adjusted_mode->crtc_vsync_end -= 1;
4389                 adjusted_mode->crtc_vsync_start -= 1;
4390         } else
4391                 pipeconf &= ~PIPECONF_INTERLACE_W_FIELD_INDICATION; /* progressive */
4392
4393         I915_WRITE(HTOTAL(pipe),
4394                    (adjusted_mode->crtc_hdisplay - 1) |
4395                    ((adjusted_mode->crtc_htotal - 1) << 16));
4396         I915_WRITE(HBLANK(pipe),
4397                    (adjusted_mode->crtc_hblank_start - 1) |
4398                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4399         I915_WRITE(HSYNC(pipe),
4400                    (adjusted_mode->crtc_hsync_start - 1) |
4401                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4402
4403         I915_WRITE(VTOTAL(pipe),
4404                    (adjusted_mode->crtc_vdisplay - 1) |
4405                    ((adjusted_mode->crtc_vtotal - 1) << 16));
4406         I915_WRITE(VBLANK(pipe),
4407                    (adjusted_mode->crtc_vblank_start - 1) |
4408                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
4409         I915_WRITE(VSYNC(pipe),
4410                    (adjusted_mode->crtc_vsync_start - 1) |
4411                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4412
4413         /* pipesrc and dspsize control the size that is scaled from,
4414          * which should always be the user's requested size.
4415          */
4416         if (!HAS_PCH_SPLIT(dev)) {
4417                 I915_WRITE(DSPSIZE(plane),
4418                            ((mode->vdisplay - 1) << 16) |
4419                            (mode->hdisplay - 1));
4420                 I915_WRITE(DSPPOS(plane), 0);
4421         }
4422         I915_WRITE(PIPESRC(pipe),
4423                    ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4424
4425         if (HAS_PCH_SPLIT(dev)) {
4426                 I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m);
4427                 I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n);
4428                 I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m);
4429                 I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n);
4430
4431                 if (has_edp_encoder && !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
4432                         ironlake_set_pll_edp(crtc, adjusted_mode->clock);
4433                 }
4434         }
4435
4436         I915_WRITE(PIPECONF(pipe), pipeconf);
4437         POSTING_READ(PIPECONF(pipe));
4438
4439         intel_wait_for_vblank(dev, pipe);
4440
4441         if (IS_GEN5(dev)) {
4442                 /* enable address swizzle for tiling buffer */
4443                 temp = I915_READ(DISP_ARB_CTL);
4444                 I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);
4445         }
4446
4447         I915_WRITE(DSPCNTR(plane), dspcntr);
4448
4449         ret = intel_pipe_set_base(crtc, x, y, old_fb);
4450
4451         intel_update_watermarks(dev);
4452
4453         drm_vblank_post_modeset(dev, pipe);
4454
4455         return ret;
4456 }
4457
4458 /** Loads the palette/gamma unit for the CRTC with the prepared values */
4459 void intel_crtc_load_lut(struct drm_crtc *crtc)
4460 {
4461         struct drm_device *dev = crtc->dev;
4462         struct drm_i915_private *dev_priv = dev->dev_private;
4463         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4464         int palreg = (intel_crtc->pipe == 0) ? PALETTE_A : PALETTE_B;
4465         int i;
4466
4467         /* The clocks have to be on to load the palette. */
4468         if (!crtc->enabled)
4469                 return;
4470
4471         /* use legacy palette for Ironlake */
4472         if (HAS_PCH_SPLIT(dev))
4473                 palreg = (intel_crtc->pipe == 0) ? LGC_PALETTE_A :
4474                                                    LGC_PALETTE_B;
4475
4476         for (i = 0; i < 256; i++) {
4477                 I915_WRITE(palreg + 4 * i,
4478                            (intel_crtc->lut_r[i] << 16) |
4479                            (intel_crtc->lut_g[i] << 8) |
4480                            intel_crtc->lut_b[i]);
4481         }
4482 }
4483
4484 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
4485 {
4486         struct drm_device *dev = crtc->dev;
4487         struct drm_i915_private *dev_priv = dev->dev_private;
4488         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4489         bool visible = base != 0;
4490         u32 cntl;
4491
4492         if (intel_crtc->cursor_visible == visible)
4493                 return;
4494
4495         cntl = I915_READ(CURACNTR);
4496         if (visible) {
4497                 /* On these chipsets we can only modify the base whilst
4498                  * the cursor is disabled.
4499                  */
4500                 I915_WRITE(CURABASE, base);
4501
4502                 cntl &= ~(CURSOR_FORMAT_MASK);
4503                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
4504                 cntl |= CURSOR_ENABLE |
4505                         CURSOR_GAMMA_ENABLE |
4506                         CURSOR_FORMAT_ARGB;
4507         } else
4508                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
4509         I915_WRITE(CURACNTR, cntl);
4510
4511         intel_crtc->cursor_visible = visible;
4512 }
4513
4514 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
4515 {
4516         struct drm_device *dev = crtc->dev;
4517         struct drm_i915_private *dev_priv = dev->dev_private;
4518         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4519         int pipe = intel_crtc->pipe;
4520         bool visible = base != 0;
4521
4522         if (intel_crtc->cursor_visible != visible) {
4523                 uint32_t cntl = I915_READ(pipe == 0 ? CURACNTR : CURBCNTR);
4524                 if (base) {
4525                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
4526                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
4527                         cntl |= pipe << 28; /* Connect to correct pipe */
4528                 } else {
4529                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
4530                         cntl |= CURSOR_MODE_DISABLE;
4531                 }
4532                 I915_WRITE(pipe == 0 ? CURACNTR : CURBCNTR, cntl);
4533
4534                 intel_crtc->cursor_visible = visible;
4535         }
4536         /* and commit changes on next vblank */
4537         I915_WRITE(pipe == 0 ? CURABASE : CURBBASE, base);
4538 }
4539
4540 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
4541 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
4542                                      bool on)
4543 {
4544         struct drm_device *dev = crtc->dev;
4545         struct drm_i915_private *dev_priv = dev->dev_private;
4546         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4547         int pipe = intel_crtc->pipe;
4548         int x = intel_crtc->cursor_x;
4549         int y = intel_crtc->cursor_y;
4550         u32 base, pos;
4551         bool visible;
4552
4553         pos = 0;
4554
4555         if (on && crtc->enabled && crtc->fb) {
4556                 base = intel_crtc->cursor_addr;
4557                 if (x > (int) crtc->fb->width)
4558                         base = 0;
4559
4560                 if (y > (int) crtc->fb->height)
4561                         base = 0;
4562         } else
4563                 base = 0;
4564
4565         if (x < 0) {
4566                 if (x + intel_crtc->cursor_width < 0)
4567                         base = 0;
4568
4569                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
4570                 x = -x;
4571         }
4572         pos |= x << CURSOR_X_SHIFT;
4573
4574         if (y < 0) {
4575                 if (y + intel_crtc->cursor_height < 0)
4576                         base = 0;
4577
4578                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
4579                 y = -y;
4580         }
4581         pos |= y << CURSOR_Y_SHIFT;
4582
4583         visible = base != 0;
4584         if (!visible && !intel_crtc->cursor_visible)
4585                 return;
4586
4587         I915_WRITE(pipe == 0 ? CURAPOS : CURBPOS, pos);
4588         if (IS_845G(dev) || IS_I865G(dev))
4589                 i845_update_cursor(crtc, base);
4590         else
4591                 i9xx_update_cursor(crtc, base);
4592
4593         if (visible)
4594                 intel_mark_busy(dev, to_intel_framebuffer(crtc->fb)->obj);
4595 }
4596
4597 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
4598                                  struct drm_file *file,
4599                                  uint32_t handle,
4600                                  uint32_t width, uint32_t height)
4601 {
4602         struct drm_device *dev = crtc->dev;
4603         struct drm_i915_private *dev_priv = dev->dev_private;
4604         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4605         struct drm_i915_gem_object *obj;
4606         uint32_t addr;
4607         int ret;
4608
4609         DRM_DEBUG_KMS("\n");
4610
4611         /* if we want to turn off the cursor ignore width and height */
4612         if (!handle) {
4613                 DRM_DEBUG_KMS("cursor off\n");
4614                 addr = 0;
4615                 obj = NULL;
4616                 mutex_lock(&dev->struct_mutex);
4617                 goto finish;
4618         }
4619
4620         /* Currently we only support 64x64 cursors */
4621         if (width != 64 || height != 64) {
4622                 DRM_ERROR("we currently only support 64x64 cursors\n");
4623                 return -EINVAL;
4624         }
4625
4626         obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
4627         if (!obj)
4628                 return -ENOENT;
4629
4630         if (obj->base.size < width * height * 4) {
4631                 DRM_ERROR("buffer is to small\n");
4632                 ret = -ENOMEM;
4633                 goto fail;
4634         }
4635
4636         /* we only need to pin inside GTT if cursor is non-phy */
4637         mutex_lock(&dev->struct_mutex);
4638         if (!dev_priv->info->cursor_needs_physical) {
4639                 if (obj->tiling_mode) {
4640                         DRM_ERROR("cursor cannot be tiled\n");
4641                         ret = -EINVAL;
4642                         goto fail_locked;
4643                 }
4644
4645                 ret = i915_gem_object_pin(obj, PAGE_SIZE, true);
4646                 if (ret) {
4647                         DRM_ERROR("failed to pin cursor bo\n");
4648                         goto fail_locked;
4649                 }
4650
4651                 ret = i915_gem_object_set_to_gtt_domain(obj, 0);
4652                 if (ret) {
4653                         DRM_ERROR("failed to move cursor bo into the GTT\n");
4654                         goto fail_unpin;
4655                 }
4656
4657                 ret = i915_gem_object_put_fence(obj);
4658                 if (ret) {
4659                         DRM_ERROR("failed to move cursor bo into the GTT\n");
4660                         goto fail_unpin;
4661                 }
4662
4663                 addr = obj->gtt_offset;
4664         } else {
4665                 int align = IS_I830(dev) ? 16 * 1024 : 256;
4666                 ret = i915_gem_attach_phys_object(dev, obj,
4667                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
4668                                                   align);
4669                 if (ret) {
4670                         DRM_ERROR("failed to attach phys object\n");
4671                         goto fail_locked;
4672                 }
4673                 addr = obj->phys_obj->handle->busaddr;
4674         }
4675
4676         if (IS_GEN2(dev))
4677                 I915_WRITE(CURSIZE, (height << 12) | width);
4678
4679  finish:
4680         if (intel_crtc->cursor_bo) {
4681                 if (dev_priv->info->cursor_needs_physical) {
4682                         if (intel_crtc->cursor_bo != obj)
4683                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
4684                 } else
4685                         i915_gem_object_unpin(intel_crtc->cursor_bo);
4686                 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
4687         }
4688
4689         mutex_unlock(&dev->struct_mutex);
4690
4691         intel_crtc->cursor_addr = addr;
4692         intel_crtc->cursor_bo = obj;
4693         intel_crtc->cursor_width = width;
4694         intel_crtc->cursor_height = height;
4695
4696         intel_crtc_update_cursor(crtc, true);
4697
4698         return 0;
4699 fail_unpin:
4700         i915_gem_object_unpin(obj);
4701 fail_locked:
4702         mutex_unlock(&dev->struct_mutex);
4703 fail:
4704         drm_gem_object_unreference_unlocked(&obj->base);
4705         return ret;
4706 }
4707
4708 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
4709 {
4710         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4711
4712         intel_crtc->cursor_x = x;
4713         intel_crtc->cursor_y = y;
4714
4715         intel_crtc_update_cursor(crtc, true);
4716
4717         return 0;
4718 }
4719
4720 /** Sets the color ramps on behalf of RandR */
4721 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
4722                                  u16 blue, int regno)
4723 {
4724         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4725
4726         intel_crtc->lut_r[regno] = red >> 8;
4727         intel_crtc->lut_g[regno] = green >> 8;
4728         intel_crtc->lut_b[regno] = blue >> 8;
4729 }
4730
4731 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
4732                              u16 *blue, int regno)
4733 {
4734         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4735
4736         *red = intel_crtc->lut_r[regno] << 8;
4737         *green = intel_crtc->lut_g[regno] << 8;
4738         *blue = intel_crtc->lut_b[regno] << 8;
4739 }
4740
4741 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
4742                                  u16 *blue, uint32_t start, uint32_t size)
4743 {
4744         int end = (start + size > 256) ? 256 : start + size, i;
4745         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4746
4747         for (i = start; i < end; i++) {
4748                 intel_crtc->lut_r[i] = red[i] >> 8;
4749                 intel_crtc->lut_g[i] = green[i] >> 8;
4750                 intel_crtc->lut_b[i] = blue[i] >> 8;
4751         }
4752
4753         intel_crtc_load_lut(crtc);
4754 }
4755
4756 /**
4757  * Get a pipe with a simple mode set on it for doing load-based monitor
4758  * detection.
4759  *
4760  * It will be up to the load-detect code to adjust the pipe as appropriate for
4761  * its requirements.  The pipe will be connected to no other encoders.
4762  *
4763  * Currently this code will only succeed if there is a pipe with no encoders
4764  * configured for it.  In the future, it could choose to temporarily disable
4765  * some outputs to free up a pipe for its use.
4766  *
4767  * \return crtc, or NULL if no pipes are available.
4768  */
4769
4770 /* VESA 640x480x72Hz mode to set on the pipe */
4771 static struct drm_display_mode load_detect_mode = {
4772         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
4773                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
4774 };
4775
4776 struct drm_crtc *intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
4777                                             struct drm_connector *connector,
4778                                             struct drm_display_mode *mode,
4779                                             int *dpms_mode)
4780 {
4781         struct intel_crtc *intel_crtc;
4782         struct drm_crtc *possible_crtc;
4783         struct drm_crtc *supported_crtc =NULL;
4784         struct drm_encoder *encoder = &intel_encoder->base;
4785         struct drm_crtc *crtc = NULL;
4786         struct drm_device *dev = encoder->dev;
4787         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
4788         struct drm_crtc_helper_funcs *crtc_funcs;
4789         int i = -1;
4790
4791         /*
4792          * Algorithm gets a little messy:
4793          *   - if the connector already has an assigned crtc, use it (but make
4794          *     sure it's on first)
4795          *   - try to find the first unused crtc that can drive this connector,
4796          *     and use that if we find one
4797          *   - if there are no unused crtcs available, try to use the first
4798          *     one we found that supports the connector
4799          */
4800
4801         /* See if we already have a CRTC for this connector */
4802         if (encoder->crtc) {
4803                 crtc = encoder->crtc;
4804                 /* Make sure the crtc and connector are running */
4805                 intel_crtc = to_intel_crtc(crtc);
4806                 *dpms_mode = intel_crtc->dpms_mode;
4807                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
4808                         crtc_funcs = crtc->helper_private;
4809                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
4810                         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
4811                 }
4812                 return crtc;
4813         }
4814
4815         /* Find an unused one (if possible) */
4816         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
4817                 i++;
4818                 if (!(encoder->possible_crtcs & (1 << i)))
4819                         continue;
4820                 if (!possible_crtc->enabled) {
4821                         crtc = possible_crtc;
4822                         break;
4823                 }
4824                 if (!supported_crtc)
4825                         supported_crtc = possible_crtc;
4826         }
4827
4828         /*
4829          * If we didn't find an unused CRTC, don't use any.
4830          */
4831         if (!crtc) {
4832                 return NULL;
4833         }
4834
4835         encoder->crtc = crtc;
4836         connector->encoder = encoder;
4837         intel_encoder->load_detect_temp = true;
4838
4839         intel_crtc = to_intel_crtc(crtc);
4840         *dpms_mode = intel_crtc->dpms_mode;
4841
4842         if (!crtc->enabled) {
4843                 if (!mode)
4844                         mode = &load_detect_mode;
4845                 drm_crtc_helper_set_mode(crtc, mode, 0, 0, crtc->fb);
4846         } else {
4847                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
4848                         crtc_funcs = crtc->helper_private;
4849                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
4850                 }
4851
4852                 /* Add this connector to the crtc */
4853                 encoder_funcs->mode_set(encoder, &crtc->mode, &crtc->mode);
4854                 encoder_funcs->commit(encoder);
4855         }
4856         /* let the connector get through one full cycle before testing */
4857         intel_wait_for_vblank(dev, intel_crtc->pipe);
4858
4859         return crtc;
4860 }
4861
4862 void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
4863                                     struct drm_connector *connector, int dpms_mode)
4864 {
4865         struct drm_encoder *encoder = &intel_encoder->base;
4866         struct drm_device *dev = encoder->dev;
4867         struct drm_crtc *crtc = encoder->crtc;
4868         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
4869         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
4870
4871         if (intel_encoder->load_detect_temp) {
4872                 encoder->crtc = NULL;
4873                 connector->encoder = NULL;
4874                 intel_encoder->load_detect_temp = false;
4875                 crtc->enabled = drm_helper_crtc_in_use(crtc);
4876                 drm_helper_disable_unused_functions(dev);
4877         }
4878
4879         /* Switch crtc and encoder back off if necessary */
4880         if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
4881                 if (encoder->crtc == crtc)
4882                         encoder_funcs->dpms(encoder, dpms_mode);
4883                 crtc_funcs->dpms(crtc, dpms_mode);
4884         }
4885 }
4886
4887 /* Returns the clock of the currently programmed mode of the given pipe. */
4888 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
4889 {
4890         struct drm_i915_private *dev_priv = dev->dev_private;
4891         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4892         int pipe = intel_crtc->pipe;
4893         u32 dpll = I915_READ((pipe == 0) ? DPLL_A : DPLL_B);
4894         u32 fp;
4895         intel_clock_t clock;
4896
4897         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
4898                 fp = I915_READ((pipe == 0) ? FPA0 : FPB0);
4899         else
4900                 fp = I915_READ((pipe == 0) ? FPA1 : FPB1);
4901
4902         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
4903         if (IS_PINEVIEW(dev)) {
4904                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
4905                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
4906         } else {
4907                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
4908                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
4909         }
4910
4911         if (!IS_GEN2(dev)) {
4912                 if (IS_PINEVIEW(dev))
4913                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
4914                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
4915                 else
4916                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
4917                                DPLL_FPA01_P1_POST_DIV_SHIFT);
4918
4919                 switch (dpll & DPLL_MODE_MASK) {
4920                 case DPLLB_MODE_DAC_SERIAL:
4921                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
4922                                 5 : 10;
4923                         break;
4924                 case DPLLB_MODE_LVDS:
4925                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
4926                                 7 : 14;
4927                         break;
4928                 default:
4929                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
4930                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
4931                         return 0;
4932                 }
4933
4934                 /* XXX: Handle the 100Mhz refclk */
4935                 intel_clock(dev, 96000, &clock);
4936         } else {
4937                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
4938
4939                 if (is_lvds) {
4940                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
4941                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
4942                         clock.p2 = 14;
4943
4944                         if ((dpll & PLL_REF_INPUT_MASK) ==
4945                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
4946                                 /* XXX: might not be 66MHz */
4947                                 intel_clock(dev, 66000, &clock);
4948                         } else
4949                                 intel_clock(dev, 48000, &clock);
4950                 } else {
4951                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
4952                                 clock.p1 = 2;
4953                         else {
4954                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
4955                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
4956                         }
4957                         if (dpll & PLL_P2_DIVIDE_BY_4)
4958                                 clock.p2 = 4;
4959                         else
4960                                 clock.p2 = 2;
4961
4962                         intel_clock(dev, 48000, &clock);
4963                 }
4964         }
4965
4966         /* XXX: It would be nice to validate the clocks, but we can't reuse
4967          * i830PllIsValid() because it relies on the xf86_config connector
4968          * configuration being accurate, which it isn't necessarily.
4969          */
4970
4971         return clock.dot;
4972 }
4973
4974 /** Returns the currently programmed mode of the given pipe. */
4975 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
4976                                              struct drm_crtc *crtc)
4977 {
4978         struct drm_i915_private *dev_priv = dev->dev_private;
4979         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4980         int pipe = intel_crtc->pipe;
4981         struct drm_display_mode *mode;
4982         int htot = I915_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
4983         int hsync = I915_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
4984         int vtot = I915_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
4985         int vsync = I915_READ((pipe == 0) ? VSYNC_A : VSYNC_B);
4986
4987         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
4988         if (!mode)
4989                 return NULL;
4990
4991         mode->clock = intel_crtc_clock_get(dev, crtc);
4992         mode->hdisplay = (htot & 0xffff) + 1;
4993         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
4994         mode->hsync_start = (hsync & 0xffff) + 1;
4995         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
4996         mode->vdisplay = (vtot & 0xffff) + 1;
4997         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
4998         mode->vsync_start = (vsync & 0xffff) + 1;
4999         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
5000
5001         drm_mode_set_name(mode);
5002         drm_mode_set_crtcinfo(mode, 0);
5003
5004         return mode;
5005 }
5006
5007 #define GPU_IDLE_TIMEOUT 500 /* ms */
5008
5009 /* When this timer fires, we've been idle for awhile */
5010 static void intel_gpu_idle_timer(unsigned long arg)
5011 {
5012         struct drm_device *dev = (struct drm_device *)arg;
5013         drm_i915_private_t *dev_priv = dev->dev_private;
5014
5015         if (!list_empty(&dev_priv->mm.active_list)) {
5016                 /* Still processing requests, so just re-arm the timer. */
5017                 mod_timer(&dev_priv->idle_timer, jiffies +
5018                           msecs_to_jiffies(GPU_IDLE_TIMEOUT));
5019                 return;
5020         }
5021
5022         dev_priv->busy = false;
5023         queue_work(dev_priv->wq, &dev_priv->idle_work);
5024 }
5025
5026 #define CRTC_IDLE_TIMEOUT 1000 /* ms */
5027
5028 static void intel_crtc_idle_timer(unsigned long arg)
5029 {
5030         struct intel_crtc *intel_crtc = (struct intel_crtc *)arg;
5031         struct drm_crtc *crtc = &intel_crtc->base;
5032         drm_i915_private_t *dev_priv = crtc->dev->dev_private;
5033         struct intel_framebuffer *intel_fb;
5034
5035         intel_fb = to_intel_framebuffer(crtc->fb);
5036         if (intel_fb && intel_fb->obj->active) {
5037                 /* The framebuffer is still being accessed by the GPU. */
5038                 mod_timer(&intel_crtc->idle_timer, jiffies +
5039                           msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
5040                 return;
5041         }
5042
5043         intel_crtc->busy = false;
5044         queue_work(dev_priv->wq, &dev_priv->idle_work);
5045 }
5046
5047 static void intel_increase_pllclock(struct drm_crtc *crtc)
5048 {
5049         struct drm_device *dev = crtc->dev;
5050         drm_i915_private_t *dev_priv = dev->dev_private;
5051         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5052         int pipe = intel_crtc->pipe;
5053         int dpll_reg = DPLL(pipe);
5054         int dpll;
5055
5056         if (HAS_PCH_SPLIT(dev))
5057                 return;
5058
5059         if (!dev_priv->lvds_downclock_avail)
5060                 return;
5061
5062         dpll = I915_READ(dpll_reg);
5063         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
5064                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
5065
5066                 /* Unlock panel regs */
5067                 I915_WRITE(PP_CONTROL,
5068                            I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
5069
5070                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
5071                 I915_WRITE(dpll_reg, dpll);
5072                 POSTING_READ(dpll_reg);
5073                 intel_wait_for_vblank(dev, pipe);
5074
5075                 dpll = I915_READ(dpll_reg);
5076                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
5077                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
5078
5079                 /* ...and lock them again */
5080                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
5081         }
5082
5083         /* Schedule downclock */
5084         mod_timer(&intel_crtc->idle_timer, jiffies +
5085                   msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
5086 }
5087
5088 static void intel_decrease_pllclock(struct drm_crtc *crtc)
5089 {
5090         struct drm_device *dev = crtc->dev;
5091         drm_i915_private_t *dev_priv = dev->dev_private;
5092         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5093         int pipe = intel_crtc->pipe;
5094         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
5095         int dpll = I915_READ(dpll_reg);
5096
5097         if (HAS_PCH_SPLIT(dev))
5098                 return;
5099
5100         if (!dev_priv->lvds_downclock_avail)
5101                 return;
5102
5103         /*
5104          * Since this is called by a timer, we should never get here in
5105          * the manual case.
5106          */
5107         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
5108                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
5109
5110                 /* Unlock panel regs */
5111                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
5112                            PANEL_UNLOCK_REGS);
5113
5114                 dpll |= DISPLAY_RATE_SELECT_FPA1;
5115                 I915_WRITE(dpll_reg, dpll);
5116                 dpll = I915_READ(dpll_reg);
5117                 intel_wait_for_vblank(dev, pipe);
5118                 dpll = I915_READ(dpll_reg);
5119                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
5120                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
5121
5122                 /* ...and lock them again */
5123                 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
5124         }
5125
5126 }
5127
5128 /**
5129  * intel_idle_update - adjust clocks for idleness
5130  * @work: work struct
5131  *
5132  * Either the GPU or display (or both) went idle.  Check the busy status
5133  * here and adjust the CRTC and GPU clocks as necessary.
5134  */
5135 static void intel_idle_update(struct work_struct *work)
5136 {
5137         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
5138                                                     idle_work);
5139         struct drm_device *dev = dev_priv->dev;
5140         struct drm_crtc *crtc;
5141         struct intel_crtc *intel_crtc;
5142         int enabled = 0;
5143
5144         if (!i915_powersave)
5145                 return;
5146
5147         mutex_lock(&dev->struct_mutex);
5148
5149         i915_update_gfx_val(dev_priv);
5150
5151         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
5152                 /* Skip inactive CRTCs */
5153                 if (!crtc->fb)
5154                         continue;
5155
5156                 enabled++;
5157                 intel_crtc = to_intel_crtc(crtc);
5158                 if (!intel_crtc->busy)
5159                         intel_decrease_pllclock(crtc);
5160         }
5161
5162         if ((enabled == 1) && (IS_I945G(dev) || IS_I945GM(dev))) {
5163                 DRM_DEBUG_DRIVER("enable memory self refresh on 945\n");
5164                 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
5165         }
5166
5167         mutex_unlock(&dev->struct_mutex);
5168 }
5169
5170 /**
5171  * intel_mark_busy - mark the GPU and possibly the display busy
5172  * @dev: drm device
5173  * @obj: object we're operating on
5174  *
5175  * Callers can use this function to indicate that the GPU is busy processing
5176  * commands.  If @obj matches one of the CRTC objects (i.e. it's a scanout
5177  * buffer), we'll also mark the display as busy, so we know to increase its
5178  * clock frequency.
5179  */
5180 void intel_mark_busy(struct drm_device *dev, struct drm_i915_gem_object *obj)
5181 {
5182         drm_i915_private_t *dev_priv = dev->dev_private;
5183         struct drm_crtc *crtc = NULL;
5184         struct intel_framebuffer *intel_fb;
5185         struct intel_crtc *intel_crtc;
5186
5187         if (!drm_core_check_feature(dev, DRIVER_MODESET))
5188                 return;
5189
5190         if (!dev_priv->busy) {
5191                 if (IS_I945G(dev) || IS_I945GM(dev)) {
5192                         u32 fw_blc_self;
5193
5194                         DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
5195                         fw_blc_self = I915_READ(FW_BLC_SELF);
5196                         fw_blc_self &= ~FW_BLC_SELF_EN;
5197                         I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
5198                 }
5199                 dev_priv->busy = true;
5200         } else
5201                 mod_timer(&dev_priv->idle_timer, jiffies +
5202                           msecs_to_jiffies(GPU_IDLE_TIMEOUT));
5203
5204         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
5205                 if (!crtc->fb)
5206                         continue;
5207
5208                 intel_crtc = to_intel_crtc(crtc);
5209                 intel_fb = to_intel_framebuffer(crtc->fb);
5210                 if (intel_fb->obj == obj) {
5211                         if (!intel_crtc->busy) {
5212                                 if (IS_I945G(dev) || IS_I945GM(dev)) {
5213                                         u32 fw_blc_self;
5214
5215                                         DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
5216                                         fw_blc_self = I915_READ(FW_BLC_SELF);
5217                                         fw_blc_self &= ~FW_BLC_SELF_EN;
5218                                         I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
5219                                 }
5220                                 /* Non-busy -> busy, upclock */
5221                                 intel_increase_pllclock(crtc);
5222                                 intel_crtc->busy = true;
5223                         } else {
5224                                 /* Busy -> busy, put off timer */
5225                                 mod_timer(&intel_crtc->idle_timer, jiffies +
5226                                           msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
5227                         }
5228                 }
5229         }
5230 }
5231
5232 static void intel_crtc_destroy(struct drm_crtc *crtc)
5233 {
5234         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5235         struct drm_device *dev = crtc->dev;
5236         struct intel_unpin_work *work;
5237         unsigned long flags;
5238
5239         spin_lock_irqsave(&dev->event_lock, flags);
5240         work = intel_crtc->unpin_work;
5241         intel_crtc->unpin_work = NULL;
5242         spin_unlock_irqrestore(&dev->event_lock, flags);
5243
5244         if (work) {
5245                 cancel_work_sync(&work->work);
5246                 kfree(work);
5247         }
5248
5249         drm_crtc_cleanup(crtc);
5250
5251         kfree(intel_crtc);
5252 }
5253
5254 static void intel_unpin_work_fn(struct work_struct *__work)
5255 {
5256         struct intel_unpin_work *work =
5257                 container_of(__work, struct intel_unpin_work, work);
5258
5259         mutex_lock(&work->dev->struct_mutex);
5260         i915_gem_object_unpin(work->old_fb_obj);
5261         drm_gem_object_unreference(&work->pending_flip_obj->base);
5262         drm_gem_object_unreference(&work->old_fb_obj->base);
5263
5264         mutex_unlock(&work->dev->struct_mutex);
5265         kfree(work);
5266 }
5267
5268 static void do_intel_finish_page_flip(struct drm_device *dev,
5269                                       struct drm_crtc *crtc)
5270 {
5271         drm_i915_private_t *dev_priv = dev->dev_private;
5272         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5273         struct intel_unpin_work *work;
5274         struct drm_i915_gem_object *obj;
5275         struct drm_pending_vblank_event *e;
5276         struct timeval tnow, tvbl;
5277         unsigned long flags;
5278
5279         /* Ignore early vblank irqs */
5280         if (intel_crtc == NULL)
5281                 return;
5282
5283         do_gettimeofday(&tnow);
5284
5285         spin_lock_irqsave(&dev->event_lock, flags);
5286         work = intel_crtc->unpin_work;
5287         if (work == NULL || !work->pending) {
5288                 spin_unlock_irqrestore(&dev->event_lock, flags);
5289                 return;
5290         }
5291
5292         intel_crtc->unpin_work = NULL;
5293
5294         if (work->event) {
5295                 e = work->event;
5296                 e->event.sequence = drm_vblank_count_and_time(dev, intel_crtc->pipe, &tvbl);
5297
5298                 /* Called before vblank count and timestamps have
5299                  * been updated for the vblank interval of flip
5300                  * completion? Need to increment vblank count and
5301                  * add one videorefresh duration to returned timestamp
5302                  * to account for this. We assume this happened if we
5303                  * get called over 0.9 frame durations after the last
5304                  * timestamped vblank.
5305                  *
5306                  * This calculation can not be used with vrefresh rates
5307                  * below 5Hz (10Hz to be on the safe side) without
5308                  * promoting to 64 integers.
5309                  */
5310                 if (10 * (timeval_to_ns(&tnow) - timeval_to_ns(&tvbl)) >
5311                     9 * crtc->framedur_ns) {
5312                         e->event.sequence++;
5313                         tvbl = ns_to_timeval(timeval_to_ns(&tvbl) +
5314                                              crtc->framedur_ns);
5315                 }
5316
5317                 e->event.tv_sec = tvbl.tv_sec;
5318                 e->event.tv_usec = tvbl.tv_usec;
5319
5320                 list_add_tail(&e->base.link,
5321                               &e->base.file_priv->event_list);
5322                 wake_up_interruptible(&e->base.file_priv->event_wait);
5323         }
5324
5325         drm_vblank_put(dev, intel_crtc->pipe);
5326
5327         spin_unlock_irqrestore(&dev->event_lock, flags);
5328
5329         obj = work->old_fb_obj;
5330
5331         atomic_clear_mask(1 << intel_crtc->plane,
5332                           &obj->pending_flip.counter);
5333         if (atomic_read(&obj->pending_flip) == 0)
5334                 wake_up(&dev_priv->pending_flip_queue);
5335
5336         schedule_work(&work->work);
5337
5338         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
5339 }
5340
5341 void intel_finish_page_flip(struct drm_device *dev, int pipe)
5342 {
5343         drm_i915_private_t *dev_priv = dev->dev_private;
5344         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
5345
5346         do_intel_finish_page_flip(dev, crtc);
5347 }
5348
5349 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
5350 {
5351         drm_i915_private_t *dev_priv = dev->dev_private;
5352         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
5353
5354         do_intel_finish_page_flip(dev, crtc);
5355 }
5356
5357 void intel_prepare_page_flip(struct drm_device *dev, int plane)
5358 {
5359         drm_i915_private_t *dev_priv = dev->dev_private;
5360         struct intel_crtc *intel_crtc =
5361                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
5362         unsigned long flags;
5363
5364         spin_lock_irqsave(&dev->event_lock, flags);
5365         if (intel_crtc->unpin_work) {
5366                 if ((++intel_crtc->unpin_work->pending) > 1)
5367                         DRM_ERROR("Prepared flip multiple times\n");
5368         } else {
5369                 DRM_DEBUG_DRIVER("preparing flip with no unpin work?\n");
5370         }
5371         spin_unlock_irqrestore(&dev->event_lock, flags);
5372 }
5373
5374 static int intel_crtc_page_flip(struct drm_crtc *crtc,
5375                                 struct drm_framebuffer *fb,
5376                                 struct drm_pending_vblank_event *event)
5377 {
5378         struct drm_device *dev = crtc->dev;
5379         struct drm_i915_private *dev_priv = dev->dev_private;
5380         struct intel_framebuffer *intel_fb;
5381         struct drm_i915_gem_object *obj;
5382         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5383         struct intel_unpin_work *work;
5384         unsigned long flags, offset;
5385         int pipe = intel_crtc->pipe;
5386         u32 pf, pipesrc;
5387         int ret;
5388
5389         work = kzalloc(sizeof *work, GFP_KERNEL);
5390         if (work == NULL)
5391                 return -ENOMEM;
5392
5393         work->event = event;
5394         work->dev = crtc->dev;
5395         intel_fb = to_intel_framebuffer(crtc->fb);
5396         work->old_fb_obj = intel_fb->obj;
5397         INIT_WORK(&work->work, intel_unpin_work_fn);
5398
5399         /* We borrow the event spin lock for protecting unpin_work */
5400         spin_lock_irqsave(&dev->event_lock, flags);
5401         if (intel_crtc->unpin_work) {
5402                 spin_unlock_irqrestore(&dev->event_lock, flags);
5403                 kfree(work);
5404
5405                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
5406                 return -EBUSY;
5407         }
5408         intel_crtc->unpin_work = work;
5409         spin_unlock_irqrestore(&dev->event_lock, flags);
5410
5411         intel_fb = to_intel_framebuffer(fb);
5412         obj = intel_fb->obj;
5413
5414         mutex_lock(&dev->struct_mutex);
5415         ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
5416         if (ret)
5417                 goto cleanup_work;
5418
5419         /* Reference the objects for the scheduled work. */
5420         drm_gem_object_reference(&work->old_fb_obj->base);
5421         drm_gem_object_reference(&obj->base);
5422
5423         crtc->fb = fb;
5424
5425         ret = drm_vblank_get(dev, intel_crtc->pipe);
5426         if (ret)
5427                 goto cleanup_objs;
5428
5429         if (IS_GEN3(dev) || IS_GEN2(dev)) {
5430                 u32 flip_mask;
5431
5432                 /* Can't queue multiple flips, so wait for the previous
5433                  * one to finish before executing the next.
5434                  */
5435                 ret = BEGIN_LP_RING(2);
5436                 if (ret)
5437                         goto cleanup_objs;
5438
5439                 if (intel_crtc->plane)
5440                         flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
5441                 else
5442                         flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
5443                 OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
5444                 OUT_RING(MI_NOOP);
5445                 ADVANCE_LP_RING();
5446         }
5447
5448         work->pending_flip_obj = obj;
5449
5450         work->enable_stall_check = true;
5451
5452         /* Offset into the new buffer for cases of shared fbs between CRTCs */
5453         offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;
5454
5455         ret = BEGIN_LP_RING(4);
5456         if (ret)
5457                 goto cleanup_objs;
5458
5459         /* Block clients from rendering to the new back buffer until
5460          * the flip occurs and the object is no longer visible.
5461          */
5462         atomic_add(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip);
5463
5464         switch (INTEL_INFO(dev)->gen) {
5465         case 2:
5466                 OUT_RING(MI_DISPLAY_FLIP |
5467                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5468                 OUT_RING(fb->pitch);
5469                 OUT_RING(obj->gtt_offset + offset);
5470                 OUT_RING(MI_NOOP);
5471                 break;
5472
5473         case 3:
5474                 OUT_RING(MI_DISPLAY_FLIP_I915 |
5475                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5476                 OUT_RING(fb->pitch);
5477                 OUT_RING(obj->gtt_offset + offset);
5478                 OUT_RING(MI_NOOP);
5479                 break;
5480
5481         case 4:
5482         case 5:
5483                 /* i965+ uses the linear or tiled offsets from the
5484                  * Display Registers (which do not change across a page-flip)
5485                  * so we need only reprogram the base address.
5486                  */
5487                 OUT_RING(MI_DISPLAY_FLIP |
5488                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5489                 OUT_RING(fb->pitch);
5490                 OUT_RING(obj->gtt_offset | obj->tiling_mode);
5491
5492                 /* XXX Enabling the panel-fitter across page-flip is so far
5493                  * untested on non-native modes, so ignore it for now.
5494                  * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
5495                  */
5496                 pf = 0;
5497                 pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
5498                 OUT_RING(pf | pipesrc);
5499                 break;
5500
5501         case 6:
5502                 OUT_RING(MI_DISPLAY_FLIP |
5503                          MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
5504                 OUT_RING(fb->pitch | obj->tiling_mode);
5505                 OUT_RING(obj->gtt_offset);
5506
5507                 pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
5508                 pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
5509                 OUT_RING(pf | pipesrc);
5510                 break;
5511         }
5512         ADVANCE_LP_RING();
5513
5514         mutex_unlock(&dev->struct_mutex);
5515
5516         trace_i915_flip_request(intel_crtc->plane, obj);
5517
5518         return 0;
5519
5520 cleanup_objs:
5521         drm_gem_object_unreference(&work->old_fb_obj->base);
5522         drm_gem_object_unreference(&obj->base);
5523 cleanup_work:
5524         mutex_unlock(&dev->struct_mutex);
5525
5526         spin_lock_irqsave(&dev->event_lock, flags);
5527         intel_crtc->unpin_work = NULL;
5528         spin_unlock_irqrestore(&dev->event_lock, flags);
5529
5530         kfree(work);
5531
5532         return ret;
5533 }
5534
5535 static struct drm_crtc_helper_funcs intel_helper_funcs = {
5536         .dpms = intel_crtc_dpms,
5537         .mode_fixup = intel_crtc_mode_fixup,
5538         .mode_set = intel_crtc_mode_set,
5539         .mode_set_base = intel_pipe_set_base,
5540         .mode_set_base_atomic = intel_pipe_set_base_atomic,
5541         .load_lut = intel_crtc_load_lut,
5542         .disable = intel_crtc_disable,
5543 };
5544
5545 static const struct drm_crtc_funcs intel_crtc_funcs = {
5546         .cursor_set = intel_crtc_cursor_set,
5547         .cursor_move = intel_crtc_cursor_move,
5548         .gamma_set = intel_crtc_gamma_set,
5549         .set_config = drm_crtc_helper_set_config,
5550         .destroy = intel_crtc_destroy,
5551         .page_flip = intel_crtc_page_flip,
5552 };
5553
5554 static void intel_sanitize_modesetting(struct drm_device *dev,
5555                                        int pipe, int plane)
5556 {
5557         struct drm_i915_private *dev_priv = dev->dev_private;
5558         u32 reg, val;
5559
5560         if (HAS_PCH_SPLIT(dev))
5561                 return;
5562
5563         /* Who knows what state these registers were left in by the BIOS or
5564          * grub?
5565          *
5566          * If we leave the registers in a conflicting state (e.g. with the
5567          * display plane reading from the other pipe than the one we intend
5568          * to use) then when we attempt to teardown the active mode, we will
5569          * not disable the pipes and planes in the correct order -- leaving
5570          * a plane reading from a disabled pipe and possibly leading to
5571          * undefined behaviour.
5572          */
5573
5574         reg = DSPCNTR(plane);
5575         val = I915_READ(reg);
5576
5577         if ((val & DISPLAY_PLANE_ENABLE) == 0)
5578                 return;
5579         if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
5580                 return;
5581
5582         /* This display plane is active and attached to the other CPU pipe. */
5583         pipe = !pipe;
5584
5585         /* Disable the plane and wait for it to stop reading from the pipe. */
5586         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
5587         intel_flush_display_plane(dev, plane);
5588
5589         if (IS_GEN2(dev))
5590                 intel_wait_for_vblank(dev, pipe);
5591
5592         if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
5593                 return;
5594
5595         /* Switch off the pipe. */
5596         reg = PIPECONF(pipe);
5597         val = I915_READ(reg);
5598         if (val & PIPECONF_ENABLE) {
5599                 I915_WRITE(reg, val & ~PIPECONF_ENABLE);
5600                 intel_wait_for_pipe_off(dev, pipe);
5601         }
5602 }
5603
5604 static void intel_crtc_init(struct drm_device *dev, int pipe)
5605 {
5606         drm_i915_private_t *dev_priv = dev->dev_private;
5607         struct intel_crtc *intel_crtc;
5608         int i;
5609
5610         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
5611         if (intel_crtc == NULL)
5612                 return;
5613
5614         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
5615
5616         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
5617         for (i = 0; i < 256; i++) {
5618                 intel_crtc->lut_r[i] = i;
5619                 intel_crtc->lut_g[i] = i;
5620                 intel_crtc->lut_b[i] = i;
5621         }
5622
5623         /* Swap pipes & planes for FBC on pre-965 */
5624         intel_crtc->pipe = pipe;
5625         intel_crtc->plane = pipe;
5626         if (IS_MOBILE(dev) && IS_GEN3(dev)) {
5627                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
5628                 intel_crtc->plane = !pipe;
5629         }
5630
5631         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
5632                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
5633         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
5634         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
5635
5636         intel_crtc->cursor_addr = 0;
5637         intel_crtc->dpms_mode = -1;
5638         intel_crtc->active = true; /* force the pipe off on setup_init_config */
5639
5640         if (HAS_PCH_SPLIT(dev)) {
5641                 intel_helper_funcs.prepare = ironlake_crtc_prepare;
5642                 intel_helper_funcs.commit = ironlake_crtc_commit;
5643         } else {
5644                 intel_helper_funcs.prepare = i9xx_crtc_prepare;
5645                 intel_helper_funcs.commit = i9xx_crtc_commit;
5646         }
5647
5648         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
5649
5650         intel_crtc->busy = false;
5651
5652         setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
5653                     (unsigned long)intel_crtc);
5654
5655         intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
5656 }
5657
5658 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
5659                                 struct drm_file *file)
5660 {
5661         drm_i915_private_t *dev_priv = dev->dev_private;
5662         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
5663         struct drm_mode_object *drmmode_obj;
5664         struct intel_crtc *crtc;
5665
5666         if (!dev_priv) {
5667                 DRM_ERROR("called with no initialization\n");
5668                 return -EINVAL;
5669         }
5670
5671         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
5672                         DRM_MODE_OBJECT_CRTC);
5673
5674         if (!drmmode_obj) {
5675                 DRM_ERROR("no such CRTC id\n");
5676                 return -EINVAL;
5677         }
5678
5679         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
5680         pipe_from_crtc_id->pipe = crtc->pipe;
5681
5682         return 0;
5683 }
5684
5685 static int intel_encoder_clones(struct drm_device *dev, int type_mask)
5686 {
5687         struct intel_encoder *encoder;
5688         int index_mask = 0;
5689         int entry = 0;
5690
5691         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
5692                 if (type_mask & encoder->clone_mask)
5693                         index_mask |= (1 << entry);
5694                 entry++;
5695         }
5696
5697         return index_mask;
5698 }
5699
5700 static bool has_edp_a(struct drm_device *dev)
5701 {
5702         struct drm_i915_private *dev_priv = dev->dev_private;
5703
5704         if (!IS_MOBILE(dev))
5705                 return false;
5706
5707         if ((I915_READ(DP_A) & DP_DETECTED) == 0)
5708                 return false;
5709
5710         if (IS_GEN5(dev) &&
5711             (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
5712                 return false;
5713
5714         return true;
5715 }
5716
5717 static void intel_setup_outputs(struct drm_device *dev)
5718 {
5719         struct drm_i915_private *dev_priv = dev->dev_private;
5720         struct intel_encoder *encoder;
5721         bool dpd_is_edp = false;
5722         bool has_lvds = false;
5723
5724         if (IS_MOBILE(dev) && !IS_I830(dev))
5725                 has_lvds = intel_lvds_init(dev);
5726         if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
5727                 /* disable the panel fitter on everything but LVDS */
5728                 I915_WRITE(PFIT_CONTROL, 0);
5729         }
5730
5731         if (HAS_PCH_SPLIT(dev)) {
5732                 dpd_is_edp = intel_dpd_is_edp(dev);
5733
5734                 if (has_edp_a(dev))
5735                         intel_dp_init(dev, DP_A);
5736
5737                 if (dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
5738                         intel_dp_init(dev, PCH_DP_D);
5739         }
5740
5741         intel_crt_init(dev);
5742
5743         if (HAS_PCH_SPLIT(dev)) {
5744                 int found;
5745
5746                 if (I915_READ(HDMIB) & PORT_DETECTED) {
5747                         /* PCH SDVOB multiplex with HDMIB */
5748                         found = intel_sdvo_init(dev, PCH_SDVOB);
5749                         if (!found)
5750                                 intel_hdmi_init(dev, HDMIB);
5751                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
5752                                 intel_dp_init(dev, PCH_DP_B);
5753                 }
5754
5755                 if (I915_READ(HDMIC) & PORT_DETECTED)
5756                         intel_hdmi_init(dev, HDMIC);
5757
5758                 if (I915_READ(HDMID) & PORT_DETECTED)
5759                         intel_hdmi_init(dev, HDMID);
5760
5761                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
5762                         intel_dp_init(dev, PCH_DP_C);
5763
5764                 if (!dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
5765                         intel_dp_init(dev, PCH_DP_D);
5766
5767         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
5768                 bool found = false;
5769
5770                 if (I915_READ(SDVOB) & SDVO_DETECTED) {
5771                         DRM_DEBUG_KMS("probing SDVOB\n");
5772                         found = intel_sdvo_init(dev, SDVOB);
5773                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
5774                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
5775                                 intel_hdmi_init(dev, SDVOB);
5776                         }
5777
5778                         if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
5779                                 DRM_DEBUG_KMS("probing DP_B\n");
5780                                 intel_dp_init(dev, DP_B);
5781                         }
5782                 }
5783
5784                 /* Before G4X SDVOC doesn't have its own detect register */
5785
5786                 if (I915_READ(SDVOB) & SDVO_DETECTED) {
5787                         DRM_DEBUG_KMS("probing SDVOC\n");
5788                         found = intel_sdvo_init(dev, SDVOC);
5789                 }
5790
5791                 if (!found && (I915_READ(SDVOC) & SDVO_DETECTED)) {
5792
5793                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
5794                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
5795                                 intel_hdmi_init(dev, SDVOC);
5796                         }
5797                         if (SUPPORTS_INTEGRATED_DP(dev)) {
5798                                 DRM_DEBUG_KMS("probing DP_C\n");
5799                                 intel_dp_init(dev, DP_C);
5800                         }
5801                 }
5802
5803                 if (SUPPORTS_INTEGRATED_DP(dev) &&
5804                     (I915_READ(DP_D) & DP_DETECTED)) {
5805                         DRM_DEBUG_KMS("probing DP_D\n");
5806                         intel_dp_init(dev, DP_D);
5807                 }
5808         } else if (IS_GEN2(dev))
5809                 intel_dvo_init(dev);
5810
5811         if (SUPPORTS_TV(dev))
5812                 intel_tv_init(dev);
5813
5814         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
5815                 encoder->base.possible_crtcs = encoder->crtc_mask;
5816                 encoder->base.possible_clones =
5817                         intel_encoder_clones(dev, encoder->clone_mask);
5818         }
5819
5820         intel_panel_setup_backlight(dev);
5821 }
5822
5823 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
5824 {
5825         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
5826
5827         drm_framebuffer_cleanup(fb);
5828         drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
5829
5830         kfree(intel_fb);
5831 }
5832
5833 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
5834                                                 struct drm_file *file,
5835                                                 unsigned int *handle)
5836 {
5837         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
5838         struct drm_i915_gem_object *obj = intel_fb->obj;
5839
5840         return drm_gem_handle_create(file, &obj->base, handle);
5841 }
5842
5843 static const struct drm_framebuffer_funcs intel_fb_funcs = {
5844         .destroy = intel_user_framebuffer_destroy,
5845         .create_handle = intel_user_framebuffer_create_handle,
5846 };
5847
5848 int intel_framebuffer_init(struct drm_device *dev,
5849                            struct intel_framebuffer *intel_fb,
5850                            struct drm_mode_fb_cmd *mode_cmd,
5851                            struct drm_i915_gem_object *obj)
5852 {
5853         int ret;
5854
5855         if (obj->tiling_mode == I915_TILING_Y)
5856                 return -EINVAL;
5857
5858         if (mode_cmd->pitch & 63)
5859                 return -EINVAL;
5860
5861         switch (mode_cmd->bpp) {
5862         case 8:
5863         case 16:
5864         case 24:
5865         case 32:
5866                 break;
5867         default:
5868                 return -EINVAL;
5869         }
5870
5871         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
5872         if (ret) {
5873                 DRM_ERROR("framebuffer init failed %d\n", ret);
5874                 return ret;
5875         }
5876
5877         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
5878         intel_fb->obj = obj;
5879         return 0;
5880 }
5881
5882 static struct drm_framebuffer *
5883 intel_user_framebuffer_create(struct drm_device *dev,
5884                               struct drm_file *filp,
5885                               struct drm_mode_fb_cmd *mode_cmd)
5886 {
5887         struct drm_i915_gem_object *obj;
5888         struct intel_framebuffer *intel_fb;
5889         int ret;
5890
5891         obj = to_intel_bo(drm_gem_object_lookup(dev, filp, mode_cmd->handle));
5892         if (!obj)
5893                 return ERR_PTR(-ENOENT);
5894
5895         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
5896         if (!intel_fb)
5897                 return ERR_PTR(-ENOMEM);
5898
5899         ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
5900         if (ret) {
5901                 drm_gem_object_unreference_unlocked(&obj->base);
5902                 kfree(intel_fb);
5903                 return ERR_PTR(ret);
5904         }
5905
5906         return &intel_fb->base;
5907 }
5908
5909 static const struct drm_mode_config_funcs intel_mode_funcs = {
5910         .fb_create = intel_user_framebuffer_create,
5911         .output_poll_changed = intel_fb_output_poll_changed,
5912 };
5913
5914 static struct drm_i915_gem_object *
5915 intel_alloc_context_page(struct drm_device *dev)
5916 {
5917         struct drm_i915_gem_object *ctx;
5918         int ret;
5919
5920         ctx = i915_gem_alloc_object(dev, 4096);
5921         if (!ctx) {
5922                 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
5923                 return NULL;
5924         }
5925
5926         mutex_lock(&dev->struct_mutex);
5927         ret = i915_gem_object_pin(ctx, 4096, true);
5928         if (ret) {
5929                 DRM_ERROR("failed to pin power context: %d\n", ret);
5930                 goto err_unref;
5931         }
5932
5933         ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
5934         if (ret) {
5935                 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
5936                 goto err_unpin;
5937         }
5938         mutex_unlock(&dev->struct_mutex);
5939
5940         return ctx;
5941
5942 err_unpin:
5943         i915_gem_object_unpin(ctx);
5944 err_unref:
5945         drm_gem_object_unreference(&ctx->base);
5946         mutex_unlock(&dev->struct_mutex);
5947         return NULL;
5948 }
5949
5950 bool ironlake_set_drps(struct drm_device *dev, u8 val)
5951 {
5952         struct drm_i915_private *dev_priv = dev->dev_private;
5953         u16 rgvswctl;
5954
5955         rgvswctl = I915_READ16(MEMSWCTL);
5956         if (rgvswctl & MEMCTL_CMD_STS) {
5957                 DRM_DEBUG("gpu busy, RCS change rejected\n");
5958                 return false; /* still busy with another command */
5959         }
5960
5961         rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
5962                 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
5963         I915_WRITE16(MEMSWCTL, rgvswctl);
5964         POSTING_READ16(MEMSWCTL);
5965
5966         rgvswctl |= MEMCTL_CMD_STS;
5967         I915_WRITE16(MEMSWCTL, rgvswctl);
5968
5969         return true;
5970 }
5971
5972 void ironlake_enable_drps(struct drm_device *dev)
5973 {
5974         struct drm_i915_private *dev_priv = dev->dev_private;
5975         u32 rgvmodectl = I915_READ(MEMMODECTL);
5976         u8 fmax, fmin, fstart, vstart;
5977
5978         /* Enable temp reporting */
5979         I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
5980         I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
5981
5982         /* 100ms RC evaluation intervals */
5983         I915_WRITE(RCUPEI, 100000);
5984         I915_WRITE(RCDNEI, 100000);
5985
5986         /* Set max/min thresholds to 90ms and 80ms respectively */
5987         I915_WRITE(RCBMAXAVG, 90000);
5988         I915_WRITE(RCBMINAVG, 80000);
5989
5990         I915_WRITE(MEMIHYST, 1);
5991
5992         /* Set up min, max, and cur for interrupt handling */
5993         fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
5994         fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
5995         fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
5996                 MEMMODE_FSTART_SHIFT;
5997
5998         vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
5999                 PXVFREQ_PX_SHIFT;
6000
6001         dev_priv->fmax = fmax; /* IPS callback will increase this */
6002         dev_priv->fstart = fstart;
6003
6004         dev_priv->max_delay = fstart;
6005         dev_priv->min_delay = fmin;
6006         dev_priv->cur_delay = fstart;
6007
6008         DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
6009                          fmax, fmin, fstart);
6010
6011         I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
6012
6013         /*
6014          * Interrupts will be enabled in ironlake_irq_postinstall
6015          */
6016
6017         I915_WRITE(VIDSTART, vstart);
6018         POSTING_READ(VIDSTART);
6019
6020         rgvmodectl |= MEMMODE_SWMODE_EN;
6021         I915_WRITE(MEMMODECTL, rgvmodectl);
6022
6023         if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
6024                 DRM_ERROR("stuck trying to change perf mode\n");
6025         msleep(1);
6026
6027         ironlake_set_drps(dev, fstart);
6028
6029         dev_priv->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
6030                 I915_READ(0x112e0);
6031         dev_priv->last_time1 = jiffies_to_msecs(jiffies);
6032         dev_priv->last_count2 = I915_READ(0x112f4);
6033         getrawmonotonic(&dev_priv->last_time2);
6034 }
6035
6036 void ironlake_disable_drps(struct drm_device *dev)
6037 {
6038         struct drm_i915_private *dev_priv = dev->dev_private;
6039         u16 rgvswctl = I915_READ16(MEMSWCTL);
6040
6041         /* Ack interrupts, disable EFC interrupt */
6042         I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
6043         I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
6044         I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
6045         I915_WRITE(DEIIR, DE_PCU_EVENT);
6046         I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
6047
6048         /* Go back to the starting frequency */
6049         ironlake_set_drps(dev, dev_priv->fstart);
6050         msleep(1);
6051         rgvswctl |= MEMCTL_CMD_STS;
6052         I915_WRITE(MEMSWCTL, rgvswctl);
6053         msleep(1);
6054
6055 }
6056
6057 void gen6_set_rps(struct drm_device *dev, u8 val)
6058 {
6059         struct drm_i915_private *dev_priv = dev->dev_private;
6060         u32 swreq;
6061
6062         swreq = (val & 0x3ff) << 25;
6063         I915_WRITE(GEN6_RPNSWREQ, swreq);
6064 }
6065
6066 void gen6_disable_rps(struct drm_device *dev)
6067 {
6068         struct drm_i915_private *dev_priv = dev->dev_private;
6069
6070         I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
6071         I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
6072         I915_WRITE(GEN6_PMIER, 0);
6073         I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
6074 }
6075
6076 static unsigned long intel_pxfreq(u32 vidfreq)
6077 {
6078         unsigned long freq;
6079         int div = (vidfreq & 0x3f0000) >> 16;
6080         int post = (vidfreq & 0x3000) >> 12;
6081         int pre = (vidfreq & 0x7);
6082
6083         if (!pre)
6084                 return 0;
6085
6086         freq = ((div * 133333) / ((1<<post) * pre));
6087
6088         return freq;
6089 }
6090
6091 void intel_init_emon(struct drm_device *dev)
6092 {
6093         struct drm_i915_private *dev_priv = dev->dev_private;
6094         u32 lcfuse;
6095         u8 pxw[16];
6096         int i;
6097
6098         /* Disable to program */
6099         I915_WRITE(ECR, 0);
6100         POSTING_READ(ECR);
6101
6102         /* Program energy weights for various events */
6103         I915_WRITE(SDEW, 0x15040d00);
6104         I915_WRITE(CSIEW0, 0x007f0000);
6105         I915_WRITE(CSIEW1, 0x1e220004);
6106         I915_WRITE(CSIEW2, 0x04000004);
6107
6108         for (i = 0; i < 5; i++)
6109                 I915_WRITE(PEW + (i * 4), 0);
6110         for (i = 0; i < 3; i++)
6111                 I915_WRITE(DEW + (i * 4), 0);
6112
6113         /* Program P-state weights to account for frequency power adjustment */
6114         for (i = 0; i < 16; i++) {
6115                 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
6116                 unsigned long freq = intel_pxfreq(pxvidfreq);
6117                 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
6118                         PXVFREQ_PX_SHIFT;
6119                 unsigned long val;
6120
6121                 val = vid * vid;
6122                 val *= (freq / 1000);
6123                 val *= 255;
6124                 val /= (127*127*900);
6125                 if (val > 0xff)
6126                         DRM_ERROR("bad pxval: %ld\n", val);
6127                 pxw[i] = val;
6128         }
6129         /* Render standby states get 0 weight */
6130         pxw[14] = 0;
6131         pxw[15] = 0;
6132
6133         for (i = 0; i < 4; i++) {
6134                 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
6135                         (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
6136                 I915_WRITE(PXW + (i * 4), val);
6137         }
6138
6139         /* Adjust magic regs to magic values (more experimental results) */
6140         I915_WRITE(OGW0, 0);
6141         I915_WRITE(OGW1, 0);
6142         I915_WRITE(EG0, 0x00007f00);
6143         I915_WRITE(EG1, 0x0000000e);
6144         I915_WRITE(EG2, 0x000e0000);
6145         I915_WRITE(EG3, 0x68000300);
6146         I915_WRITE(EG4, 0x42000000);
6147         I915_WRITE(EG5, 0x00140031);
6148         I915_WRITE(EG6, 0);
6149         I915_WRITE(EG7, 0);
6150
6151         for (i = 0; i < 8; i++)
6152                 I915_WRITE(PXWL + (i * 4), 0);
6153
6154         /* Enable PMON + select events */
6155         I915_WRITE(ECR, 0x80000019);
6156
6157         lcfuse = I915_READ(LCFUSE02);
6158
6159         dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
6160 }
6161
6162 void gen6_enable_rps(struct drm_i915_private *dev_priv)
6163 {
6164         u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
6165         u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
6166         u32 pcu_mbox;
6167         int cur_freq, min_freq, max_freq;
6168         int i;
6169
6170         /* Here begins a magic sequence of register writes to enable
6171          * auto-downclocking.
6172          *
6173          * Perhaps there might be some value in exposing these to
6174          * userspace...
6175          */
6176         I915_WRITE(GEN6_RC_STATE, 0);
6177         __gen6_force_wake_get(dev_priv);
6178
6179         /* disable the counters and set deterministic thresholds */
6180         I915_WRITE(GEN6_RC_CONTROL, 0);
6181
6182         I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
6183         I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
6184         I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
6185         I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
6186         I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
6187
6188         for (i = 0; i < I915_NUM_RINGS; i++)
6189                 I915_WRITE(RING_MAX_IDLE(dev_priv->ring[i].mmio_base), 10);
6190
6191         I915_WRITE(GEN6_RC_SLEEP, 0);
6192         I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
6193         I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
6194         I915_WRITE(GEN6_RC6p_THRESHOLD, 100000);
6195         I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
6196
6197         I915_WRITE(GEN6_RC_CONTROL,
6198                    GEN6_RC_CTL_RC6p_ENABLE |
6199                    GEN6_RC_CTL_RC6_ENABLE |
6200                    GEN6_RC_CTL_EI_MODE(1) |
6201                    GEN6_RC_CTL_HW_ENABLE);
6202
6203         I915_WRITE(GEN6_RPNSWREQ,
6204                    GEN6_FREQUENCY(10) |
6205                    GEN6_OFFSET(0) |
6206                    GEN6_AGGRESSIVE_TURBO);
6207         I915_WRITE(GEN6_RC_VIDEO_FREQ,
6208                    GEN6_FREQUENCY(12));
6209
6210         I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
6211         I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
6212                    18 << 24 |
6213                    6 << 16);
6214         I915_WRITE(GEN6_RP_UP_THRESHOLD, 90000);
6215         I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 100000);
6216         I915_WRITE(GEN6_RP_UP_EI, 100000);
6217         I915_WRITE(GEN6_RP_DOWN_EI, 300000);
6218         I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
6219         I915_WRITE(GEN6_RP_CONTROL,
6220                    GEN6_RP_MEDIA_TURBO |
6221                    GEN6_RP_USE_NORMAL_FREQ |
6222                    GEN6_RP_MEDIA_IS_GFX |
6223                    GEN6_RP_ENABLE |
6224                    GEN6_RP_UP_BUSY_MAX |
6225                    GEN6_RP_DOWN_BUSY_MIN);
6226
6227         if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6228                      500))
6229                 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
6230
6231         I915_WRITE(GEN6_PCODE_DATA, 0);
6232         I915_WRITE(GEN6_PCODE_MAILBOX,
6233                    GEN6_PCODE_READY |
6234                    GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
6235         if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6236                      500))
6237                 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
6238
6239         min_freq = (rp_state_cap & 0xff0000) >> 16;
6240         max_freq = rp_state_cap & 0xff;
6241         cur_freq = (gt_perf_status & 0xff00) >> 8;
6242
6243         /* Check for overclock support */
6244         if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6245                      500))
6246                 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
6247         I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_READ_OC_PARAMS);
6248         pcu_mbox = I915_READ(GEN6_PCODE_DATA);
6249         if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6250                      500))
6251                 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
6252         if (pcu_mbox & (1<<31)) { /* OC supported */
6253                 max_freq = pcu_mbox & 0xff;
6254                 DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 100);
6255         }
6256
6257         /* In units of 100MHz */
6258         dev_priv->max_delay = max_freq;
6259         dev_priv->min_delay = min_freq;
6260         dev_priv->cur_delay = cur_freq;
6261
6262         /* requires MSI enabled */
6263         I915_WRITE(GEN6_PMIER,
6264                    GEN6_PM_MBOX_EVENT |
6265                    GEN6_PM_THERMAL_EVENT |
6266                    GEN6_PM_RP_DOWN_TIMEOUT |
6267                    GEN6_PM_RP_UP_THRESHOLD |
6268                    GEN6_PM_RP_DOWN_THRESHOLD |
6269                    GEN6_PM_RP_UP_EI_EXPIRED |
6270                    GEN6_PM_RP_DOWN_EI_EXPIRED);
6271         I915_WRITE(GEN6_PMIMR, 0);
6272         /* enable all PM interrupts */
6273         I915_WRITE(GEN6_PMINTRMSK, 0);
6274
6275         __gen6_force_wake_put(dev_priv);
6276 }
6277
6278 void intel_enable_clock_gating(struct drm_device *dev)
6279 {
6280         struct drm_i915_private *dev_priv = dev->dev_private;
6281
6282         /*
6283          * Disable clock gating reported to work incorrectly according to the
6284          * specs, but enable as much else as we can.
6285          */
6286         if (HAS_PCH_SPLIT(dev)) {
6287                 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
6288
6289                 if (IS_GEN5(dev)) {
6290                         /* Required for FBC */
6291                         dspclk_gate |= DPFDUNIT_CLOCK_GATE_DISABLE;
6292                         /* Required for CxSR */
6293                         dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE;
6294
6295                         I915_WRITE(PCH_3DCGDIS0,
6296                                    MARIUNIT_CLOCK_GATE_DISABLE |
6297                                    SVSMUNIT_CLOCK_GATE_DISABLE);
6298                         I915_WRITE(PCH_3DCGDIS1,
6299                                    VFMUNIT_CLOCK_GATE_DISABLE);
6300                 }
6301
6302                 I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
6303
6304                 /*
6305                  * On Ibex Peak and Cougar Point, we need to disable clock
6306                  * gating for the panel power sequencer or it will fail to
6307                  * start up when no ports are active.
6308                  */
6309                 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
6310
6311                 /*
6312                  * According to the spec the following bits should be set in
6313                  * order to enable memory self-refresh
6314                  * The bit 22/21 of 0x42004
6315                  * The bit 5 of 0x42020
6316                  * The bit 15 of 0x45000
6317                  */
6318                 if (IS_GEN5(dev)) {
6319                         I915_WRITE(ILK_DISPLAY_CHICKEN2,
6320                                         (I915_READ(ILK_DISPLAY_CHICKEN2) |
6321                                         ILK_DPARB_GATE | ILK_VSDPFD_FULL));
6322                         I915_WRITE(ILK_DSPCLK_GATE,
6323                                         (I915_READ(ILK_DSPCLK_GATE) |
6324                                                 ILK_DPARB_CLK_GATE));
6325                         I915_WRITE(DISP_ARB_CTL,
6326                                         (I915_READ(DISP_ARB_CTL) |
6327                                                 DISP_FBC_WM_DIS));
6328                         I915_WRITE(WM3_LP_ILK, 0);
6329                         I915_WRITE(WM2_LP_ILK, 0);
6330                         I915_WRITE(WM1_LP_ILK, 0);
6331                 }
6332                 /*
6333                  * Based on the document from hardware guys the following bits
6334                  * should be set unconditionally in order to enable FBC.
6335                  * The bit 22 of 0x42000
6336                  * The bit 22 of 0x42004
6337                  * The bit 7,8,9 of 0x42020.
6338                  */
6339                 if (IS_IRONLAKE_M(dev)) {
6340                         I915_WRITE(ILK_DISPLAY_CHICKEN1,
6341                                    I915_READ(ILK_DISPLAY_CHICKEN1) |
6342                                    ILK_FBCQ_DIS);
6343                         I915_WRITE(ILK_DISPLAY_CHICKEN2,
6344                                    I915_READ(ILK_DISPLAY_CHICKEN2) |
6345                                    ILK_DPARB_GATE);
6346                         I915_WRITE(ILK_DSPCLK_GATE,
6347                                    I915_READ(ILK_DSPCLK_GATE) |
6348                                    ILK_DPFC_DIS1 |
6349                                    ILK_DPFC_DIS2 |
6350                                    ILK_CLK_FBC);
6351                 }
6352
6353                 I915_WRITE(ILK_DISPLAY_CHICKEN2,
6354                            I915_READ(ILK_DISPLAY_CHICKEN2) |
6355                            ILK_ELPIN_409_SELECT);
6356
6357                 if (IS_GEN5(dev)) {
6358                         I915_WRITE(_3D_CHICKEN2,
6359                                    _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
6360                                    _3D_CHICKEN2_WM_READ_PIPELINED);
6361                 }
6362
6363                 if (IS_GEN6(dev)) {
6364                         I915_WRITE(WM3_LP_ILK, 0);
6365                         I915_WRITE(WM2_LP_ILK, 0);
6366                         I915_WRITE(WM1_LP_ILK, 0);
6367
6368                         /*
6369                          * According to the spec the following bits should be
6370                          * set in order to enable memory self-refresh and fbc:
6371                          * The bit21 and bit22 of 0x42000
6372                          * The bit21 and bit22 of 0x42004
6373                          * The bit5 and bit7 of 0x42020
6374                          * The bit14 of 0x70180
6375                          * The bit14 of 0x71180
6376                          */
6377                         I915_WRITE(ILK_DISPLAY_CHICKEN1,
6378                                    I915_READ(ILK_DISPLAY_CHICKEN1) |
6379                                    ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
6380                         I915_WRITE(ILK_DISPLAY_CHICKEN2,
6381                                    I915_READ(ILK_DISPLAY_CHICKEN2) |
6382                                    ILK_DPARB_GATE | ILK_VSDPFD_FULL);
6383                         I915_WRITE(ILK_DSPCLK_GATE,
6384                                    I915_READ(ILK_DSPCLK_GATE) |
6385                                    ILK_DPARB_CLK_GATE  |
6386                                    ILK_DPFD_CLK_GATE);
6387
6388                         I915_WRITE(DSPACNTR,
6389                                    I915_READ(DSPACNTR) |
6390                                    DISPPLANE_TRICKLE_FEED_DISABLE);
6391                         I915_WRITE(DSPBCNTR,
6392                                    I915_READ(DSPBCNTR) |
6393                                    DISPPLANE_TRICKLE_FEED_DISABLE);
6394                 }
6395         } else if (IS_G4X(dev)) {
6396                 uint32_t dspclk_gate;
6397                 I915_WRITE(RENCLK_GATE_D1, 0);
6398                 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
6399                        GS_UNIT_CLOCK_GATE_DISABLE |
6400                        CL_UNIT_CLOCK_GATE_DISABLE);
6401                 I915_WRITE(RAMCLK_GATE_D, 0);
6402                 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
6403                         OVRUNIT_CLOCK_GATE_DISABLE |
6404                         OVCUNIT_CLOCK_GATE_DISABLE;
6405                 if (IS_GM45(dev))
6406                         dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
6407                 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
6408         } else if (IS_CRESTLINE(dev)) {
6409                 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
6410                 I915_WRITE(RENCLK_GATE_D2, 0);
6411                 I915_WRITE(DSPCLK_GATE_D, 0);
6412                 I915_WRITE(RAMCLK_GATE_D, 0);
6413                 I915_WRITE16(DEUC, 0);
6414         } else if (IS_BROADWATER(dev)) {
6415                 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
6416                        I965_RCC_CLOCK_GATE_DISABLE |
6417                        I965_RCPB_CLOCK_GATE_DISABLE |
6418                        I965_ISC_CLOCK_GATE_DISABLE |
6419                        I965_FBC_CLOCK_GATE_DISABLE);
6420                 I915_WRITE(RENCLK_GATE_D2, 0);
6421         } else if (IS_GEN3(dev)) {
6422                 u32 dstate = I915_READ(D_STATE);
6423
6424                 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
6425                         DSTATE_DOT_CLOCK_GATING;
6426                 I915_WRITE(D_STATE, dstate);
6427         } else if (IS_I85X(dev) || IS_I865G(dev)) {
6428                 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
6429         } else if (IS_I830(dev)) {
6430                 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
6431         }
6432 }
6433
6434 void intel_disable_clock_gating(struct drm_device *dev)
6435 {
6436         struct drm_i915_private *dev_priv = dev->dev_private;
6437
6438         if (dev_priv->renderctx) {
6439                 struct drm_i915_gem_object *obj = dev_priv->renderctx;
6440
6441                 I915_WRITE(CCID, 0);
6442                 POSTING_READ(CCID);
6443
6444                 i915_gem_object_unpin(obj);
6445                 drm_gem_object_unreference(&obj->base);
6446                 dev_priv->renderctx = NULL;
6447         }
6448
6449         if (dev_priv->pwrctx) {
6450                 struct drm_i915_gem_object *obj = dev_priv->pwrctx;
6451
6452                 I915_WRITE(PWRCTXA, 0);
6453                 POSTING_READ(PWRCTXA);
6454
6455                 i915_gem_object_unpin(obj);
6456                 drm_gem_object_unreference(&obj->base);
6457                 dev_priv->pwrctx = NULL;
6458         }
6459 }
6460
6461 static void ironlake_disable_rc6(struct drm_device *dev)
6462 {
6463         struct drm_i915_private *dev_priv = dev->dev_private;
6464
6465         /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
6466         I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
6467         wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
6468                  10);
6469         POSTING_READ(CCID);
6470         I915_WRITE(PWRCTXA, 0);
6471         POSTING_READ(PWRCTXA);
6472         I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
6473         POSTING_READ(RSTDBYCTL);
6474         i915_gem_object_unpin(dev_priv->renderctx);
6475         drm_gem_object_unreference(&dev_priv->renderctx->base);
6476         dev_priv->renderctx = NULL;
6477         i915_gem_object_unpin(dev_priv->pwrctx);
6478         drm_gem_object_unreference(&dev_priv->pwrctx->base);
6479         dev_priv->pwrctx = NULL;
6480 }
6481
6482 void ironlake_enable_rc6(struct drm_device *dev)
6483 {
6484         struct drm_i915_private *dev_priv = dev->dev_private;
6485         int ret;
6486
6487         /*
6488          * GPU can automatically power down the render unit if given a page
6489          * to save state.
6490          */
6491         ret = BEGIN_LP_RING(6);
6492         if (ret) {
6493                 ironlake_disable_rc6(dev);
6494                 return;
6495         }
6496         OUT_RING(MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
6497         OUT_RING(MI_SET_CONTEXT);
6498         OUT_RING(dev_priv->renderctx->gtt_offset |
6499                  MI_MM_SPACE_GTT |
6500                  MI_SAVE_EXT_STATE_EN |
6501                  MI_RESTORE_EXT_STATE_EN |
6502                  MI_RESTORE_INHIBIT);
6503         OUT_RING(MI_SUSPEND_FLUSH);
6504         OUT_RING(MI_NOOP);
6505         OUT_RING(MI_FLUSH);
6506         ADVANCE_LP_RING();
6507
6508         I915_WRITE(PWRCTXA, dev_priv->pwrctx->gtt_offset | PWRCTX_EN);
6509         I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
6510 }
6511
6512 /* Set up chip specific display functions */
6513 static void intel_init_display(struct drm_device *dev)
6514 {
6515         struct drm_i915_private *dev_priv = dev->dev_private;
6516
6517         /* We always want a DPMS function */
6518         if (HAS_PCH_SPLIT(dev))
6519                 dev_priv->display.dpms = ironlake_crtc_dpms;
6520         else
6521                 dev_priv->display.dpms = i9xx_crtc_dpms;
6522
6523         if (I915_HAS_FBC(dev)) {
6524                 if (HAS_PCH_SPLIT(dev)) {
6525                         dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
6526                         dev_priv->display.enable_fbc = ironlake_enable_fbc;
6527                         dev_priv->display.disable_fbc = ironlake_disable_fbc;
6528                 } else if (IS_GM45(dev)) {
6529                         dev_priv->display.fbc_enabled = g4x_fbc_enabled;
6530                         dev_priv->display.enable_fbc = g4x_enable_fbc;
6531                         dev_priv->display.disable_fbc = g4x_disable_fbc;
6532                 } else if (IS_CRESTLINE(dev)) {
6533                         dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
6534                         dev_priv->display.enable_fbc = i8xx_enable_fbc;
6535                         dev_priv->display.disable_fbc = i8xx_disable_fbc;
6536                 }
6537                 /* 855GM needs testing */
6538         }
6539
6540         /* Returns the core display clock speed */
6541         if (IS_I945G(dev) || (IS_G33(dev) && ! IS_PINEVIEW_M(dev)))
6542                 dev_priv->display.get_display_clock_speed =
6543                         i945_get_display_clock_speed;
6544         else if (IS_I915G(dev))
6545                 dev_priv->display.get_display_clock_speed =
6546                         i915_get_display_clock_speed;
6547         else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
6548                 dev_priv->display.get_display_clock_speed =
6549                         i9xx_misc_get_display_clock_speed;
6550         else if (IS_I915GM(dev))
6551                 dev_priv->display.get_display_clock_speed =
6552                         i915gm_get_display_clock_speed;
6553         else if (IS_I865G(dev))
6554                 dev_priv->display.get_display_clock_speed =
6555                         i865_get_display_clock_speed;
6556         else if (IS_I85X(dev))
6557                 dev_priv->display.get_display_clock_speed =
6558                         i855_get_display_clock_speed;
6559         else /* 852, 830 */
6560                 dev_priv->display.get_display_clock_speed =
6561                         i830_get_display_clock_speed;
6562
6563         /* For FIFO watermark updates */
6564         if (HAS_PCH_SPLIT(dev)) {
6565                 if (IS_GEN5(dev)) {
6566                         if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
6567                                 dev_priv->display.update_wm = ironlake_update_wm;
6568                         else {
6569                                 DRM_DEBUG_KMS("Failed to get proper latency. "
6570                                               "Disable CxSR\n");
6571                                 dev_priv->display.update_wm = NULL;
6572                         }
6573                 } else if (IS_GEN6(dev)) {
6574                         if (SNB_READ_WM0_LATENCY()) {
6575                                 dev_priv->display.update_wm = sandybridge_update_wm;
6576                         } else {
6577                                 DRM_DEBUG_KMS("Failed to read display plane latency. "
6578                                               "Disable CxSR\n");
6579                                 dev_priv->display.update_wm = NULL;
6580                         }
6581                 } else
6582                         dev_priv->display.update_wm = NULL;
6583         } else if (IS_PINEVIEW(dev)) {
6584                 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
6585                                             dev_priv->is_ddr3,
6586                                             dev_priv->fsb_freq,
6587                                             dev_priv->mem_freq)) {
6588                         DRM_INFO("failed to find known CxSR latency "
6589                                  "(found ddr%s fsb freq %d, mem freq %d), "
6590                                  "disabling CxSR\n",
6591                                  (dev_priv->is_ddr3 == 1) ? "3": "2",
6592                                  dev_priv->fsb_freq, dev_priv->mem_freq);
6593                         /* Disable CxSR and never update its watermark again */
6594                         pineview_disable_cxsr(dev);
6595                         dev_priv->display.update_wm = NULL;
6596                 } else
6597                         dev_priv->display.update_wm = pineview_update_wm;
6598         } else if (IS_G4X(dev))
6599                 dev_priv->display.update_wm = g4x_update_wm;
6600         else if (IS_GEN4(dev))
6601                 dev_priv->display.update_wm = i965_update_wm;
6602         else if (IS_GEN3(dev)) {
6603                 dev_priv->display.update_wm = i9xx_update_wm;
6604                 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
6605         } else if (IS_I85X(dev)) {
6606                 dev_priv->display.update_wm = i9xx_update_wm;
6607                 dev_priv->display.get_fifo_size = i85x_get_fifo_size;
6608         } else {
6609                 dev_priv->display.update_wm = i830_update_wm;
6610                 if (IS_845G(dev))
6611                         dev_priv->display.get_fifo_size = i845_get_fifo_size;
6612                 else
6613                         dev_priv->display.get_fifo_size = i830_get_fifo_size;
6614         }
6615 }
6616
6617 /*
6618  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
6619  * resume, or other times.  This quirk makes sure that's the case for
6620  * affected systems.
6621  */
6622 static void quirk_pipea_force (struct drm_device *dev)
6623 {
6624         struct drm_i915_private *dev_priv = dev->dev_private;
6625
6626         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
6627         DRM_DEBUG_DRIVER("applying pipe a force quirk\n");
6628 }
6629
6630 struct intel_quirk {
6631         int device;
6632         int subsystem_vendor;
6633         int subsystem_device;
6634         void (*hook)(struct drm_device *dev);
6635 };
6636
6637 struct intel_quirk intel_quirks[] = {
6638         /* HP Compaq 2730p needs pipe A force quirk (LP: #291555) */
6639         { 0x2a42, 0x103c, 0x30eb, quirk_pipea_force },
6640         /* HP Mini needs pipe A force quirk (LP: #322104) */
6641         { 0x27ae,0x103c, 0x361a, quirk_pipea_force },
6642
6643         /* Thinkpad R31 needs pipe A force quirk */
6644         { 0x3577, 0x1014, 0x0505, quirk_pipea_force },
6645         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
6646         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
6647
6648         /* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
6649         { 0x3577,  0x1014, 0x0513, quirk_pipea_force },
6650         /* ThinkPad X40 needs pipe A force quirk */
6651
6652         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
6653         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
6654
6655         /* 855 & before need to leave pipe A & dpll A up */
6656         { 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
6657         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
6658 };
6659
6660 static void intel_init_quirks(struct drm_device *dev)
6661 {
6662         struct pci_dev *d = dev->pdev;
6663         int i;
6664
6665         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
6666                 struct intel_quirk *q = &intel_quirks[i];
6667
6668                 if (d->device == q->device &&
6669                     (d->subsystem_vendor == q->subsystem_vendor ||
6670                      q->subsystem_vendor == PCI_ANY_ID) &&
6671                     (d->subsystem_device == q->subsystem_device ||
6672                      q->subsystem_device == PCI_ANY_ID))
6673                         q->hook(dev);
6674         }
6675 }
6676
6677 /* Disable the VGA plane that we never use */
6678 static void i915_disable_vga(struct drm_device *dev)
6679 {
6680         struct drm_i915_private *dev_priv = dev->dev_private;
6681         u8 sr1;
6682         u32 vga_reg;
6683
6684         if (HAS_PCH_SPLIT(dev))
6685                 vga_reg = CPU_VGACNTRL;
6686         else
6687                 vga_reg = VGACNTRL;
6688
6689         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
6690         outb(1, VGA_SR_INDEX);
6691         sr1 = inb(VGA_SR_DATA);
6692         outb(sr1 | 1<<5, VGA_SR_DATA);
6693         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
6694         udelay(300);
6695
6696         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
6697         POSTING_READ(vga_reg);
6698 }
6699
6700 void intel_modeset_init(struct drm_device *dev)
6701 {
6702         struct drm_i915_private *dev_priv = dev->dev_private;
6703         int i;
6704
6705         drm_mode_config_init(dev);
6706
6707         dev->mode_config.min_width = 0;
6708         dev->mode_config.min_height = 0;
6709
6710         dev->mode_config.funcs = (void *)&intel_mode_funcs;
6711
6712         intel_init_quirks(dev);
6713
6714         intel_init_display(dev);
6715
6716         if (IS_GEN2(dev)) {
6717                 dev->mode_config.max_width = 2048;
6718                 dev->mode_config.max_height = 2048;
6719         } else if (IS_GEN3(dev)) {
6720                 dev->mode_config.max_width = 4096;
6721                 dev->mode_config.max_height = 4096;
6722         } else {
6723                 dev->mode_config.max_width = 8192;
6724                 dev->mode_config.max_height = 8192;
6725         }
6726         dev->mode_config.fb_base = dev->agp->base;
6727
6728         if (IS_MOBILE(dev) || !IS_GEN2(dev))
6729                 dev_priv->num_pipe = 2;
6730         else
6731                 dev_priv->num_pipe = 1;
6732         DRM_DEBUG_KMS("%d display pipe%s available.\n",
6733                       dev_priv->num_pipe, dev_priv->num_pipe > 1 ? "s" : "");
6734
6735         for (i = 0; i < dev_priv->num_pipe; i++) {
6736                 intel_crtc_init(dev, i);
6737         }
6738
6739         intel_setup_outputs(dev);
6740
6741         intel_enable_clock_gating(dev);
6742
6743         /* Just disable it once at startup */
6744         i915_disable_vga(dev);
6745
6746         if (IS_IRONLAKE_M(dev)) {
6747                 ironlake_enable_drps(dev);
6748                 intel_init_emon(dev);
6749         }
6750
6751         if (IS_GEN6(dev))
6752                 gen6_enable_rps(dev_priv);
6753
6754         if (IS_IRONLAKE_M(dev)) {
6755                 dev_priv->renderctx = intel_alloc_context_page(dev);
6756                 if (!dev_priv->renderctx)
6757                         goto skip_rc6;
6758                 dev_priv->pwrctx = intel_alloc_context_page(dev);
6759                 if (!dev_priv->pwrctx) {
6760                         i915_gem_object_unpin(dev_priv->renderctx);
6761                         drm_gem_object_unreference(&dev_priv->renderctx->base);
6762                         dev_priv->renderctx = NULL;
6763                         goto skip_rc6;
6764                 }
6765                 ironlake_enable_rc6(dev);
6766         }
6767
6768 skip_rc6:
6769         INIT_WORK(&dev_priv->idle_work, intel_idle_update);
6770         setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
6771                     (unsigned long)dev);
6772
6773         intel_setup_overlay(dev);
6774 }
6775
6776 void intel_modeset_cleanup(struct drm_device *dev)
6777 {
6778         struct drm_i915_private *dev_priv = dev->dev_private;
6779         struct drm_crtc *crtc;
6780         struct intel_crtc *intel_crtc;
6781
6782         drm_kms_helper_poll_fini(dev);
6783         mutex_lock(&dev->struct_mutex);
6784
6785         intel_unregister_dsm_handler();
6786
6787
6788         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6789                 /* Skip inactive CRTCs */
6790                 if (!crtc->fb)
6791                         continue;
6792
6793                 intel_crtc = to_intel_crtc(crtc);
6794                 intel_increase_pllclock(crtc);
6795         }
6796
6797         if (dev_priv->display.disable_fbc)
6798                 dev_priv->display.disable_fbc(dev);
6799
6800         if (IS_IRONLAKE_M(dev))
6801                 ironlake_disable_drps(dev);
6802         if (IS_GEN6(dev))
6803                 gen6_disable_rps(dev);
6804
6805         if (IS_IRONLAKE_M(dev))
6806                 ironlake_disable_rc6(dev);
6807
6808         mutex_unlock(&dev->struct_mutex);
6809
6810         /* Disable the irq before mode object teardown, for the irq might
6811          * enqueue unpin/hotplug work. */
6812         drm_irq_uninstall(dev);
6813         cancel_work_sync(&dev_priv->hotplug_work);
6814
6815         /* Shut off idle work before the crtcs get freed. */
6816         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6817                 intel_crtc = to_intel_crtc(crtc);
6818                 del_timer_sync(&intel_crtc->idle_timer);
6819         }
6820         del_timer_sync(&dev_priv->idle_timer);
6821         cancel_work_sync(&dev_priv->idle_work);
6822
6823         drm_mode_config_cleanup(dev);
6824 }
6825
6826 /*
6827  * Return which encoder is currently attached for connector.
6828  */
6829 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
6830 {
6831         return &intel_attached_encoder(connector)->base;
6832 }
6833
6834 void intel_connector_attach_encoder(struct intel_connector *connector,
6835                                     struct intel_encoder *encoder)
6836 {
6837         connector->encoder = encoder;
6838         drm_mode_connector_attach_encoder(&connector->base,
6839                                           &encoder->base);
6840 }
6841
6842 /*
6843  * set vga decode state - true == enable VGA decode
6844  */
6845 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
6846 {
6847         struct drm_i915_private *dev_priv = dev->dev_private;
6848         u16 gmch_ctrl;
6849
6850         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
6851         if (state)
6852                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
6853         else
6854                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
6855         pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
6856         return 0;
6857 }
6858
6859 #ifdef CONFIG_DEBUG_FS
6860 #include <linux/seq_file.h>
6861
6862 struct intel_display_error_state {
6863         struct intel_cursor_error_state {
6864                 u32 control;
6865                 u32 position;
6866                 u32 base;
6867                 u32 size;
6868         } cursor[2];
6869
6870         struct intel_pipe_error_state {
6871                 u32 conf;
6872                 u32 source;
6873
6874                 u32 htotal;
6875                 u32 hblank;
6876                 u32 hsync;
6877                 u32 vtotal;
6878                 u32 vblank;
6879                 u32 vsync;
6880         } pipe[2];
6881
6882         struct intel_plane_error_state {
6883                 u32 control;
6884                 u32 stride;
6885                 u32 size;
6886                 u32 pos;
6887                 u32 addr;
6888                 u32 surface;
6889                 u32 tile_offset;
6890         } plane[2];
6891 };
6892
6893 struct intel_display_error_state *
6894 intel_display_capture_error_state(struct drm_device *dev)
6895 {
6896         drm_i915_private_t *dev_priv = dev->dev_private;
6897         struct intel_display_error_state *error;
6898         int i;
6899
6900         error = kmalloc(sizeof(*error), GFP_ATOMIC);
6901         if (error == NULL)
6902                 return NULL;
6903
6904         for (i = 0; i < 2; i++) {
6905                 error->cursor[i].control = I915_READ(CURCNTR(i));
6906                 error->cursor[i].position = I915_READ(CURPOS(i));
6907                 error->cursor[i].base = I915_READ(CURBASE(i));
6908
6909                 error->plane[i].control = I915_READ(DSPCNTR(i));
6910                 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
6911                 error->plane[i].size = I915_READ(DSPSIZE(i));
6912                 error->plane[i].pos= I915_READ(DSPPOS(i));
6913                 error->plane[i].addr = I915_READ(DSPADDR(i));
6914                 if (INTEL_INFO(dev)->gen >= 4) {
6915                         error->plane[i].surface = I915_READ(DSPSURF(i));
6916                         error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
6917                 }
6918
6919                 error->pipe[i].conf = I915_READ(PIPECONF(i));
6920                 error->pipe[i].source = I915_READ(PIPESRC(i));
6921                 error->pipe[i].htotal = I915_READ(HTOTAL(i));
6922                 error->pipe[i].hblank = I915_READ(HBLANK(i));
6923                 error->pipe[i].hsync = I915_READ(HSYNC(i));
6924                 error->pipe[i].vtotal = I915_READ(VTOTAL(i));
6925                 error->pipe[i].vblank = I915_READ(VBLANK(i));
6926                 error->pipe[i].vsync = I915_READ(VSYNC(i));
6927         }
6928
6929         return error;
6930 }
6931
6932 void
6933 intel_display_print_error_state(struct seq_file *m,
6934                                 struct drm_device *dev,
6935                                 struct intel_display_error_state *error)
6936 {
6937         int i;
6938
6939         for (i = 0; i < 2; i++) {
6940                 seq_printf(m, "Pipe [%d]:\n", i);
6941                 seq_printf(m, "  CONF: %08x\n", error->pipe[i].conf);
6942                 seq_printf(m, "  SRC: %08x\n", error->pipe[i].source);
6943                 seq_printf(m, "  HTOTAL: %08x\n", error->pipe[i].htotal);
6944                 seq_printf(m, "  HBLANK: %08x\n", error->pipe[i].hblank);
6945                 seq_printf(m, "  HSYNC: %08x\n", error->pipe[i].hsync);
6946                 seq_printf(m, "  VTOTAL: %08x\n", error->pipe[i].vtotal);
6947                 seq_printf(m, "  VBLANK: %08x\n", error->pipe[i].vblank);
6948                 seq_printf(m, "  VSYNC: %08x\n", error->pipe[i].vsync);
6949
6950                 seq_printf(m, "Plane [%d]:\n", i);
6951                 seq_printf(m, "  CNTR: %08x\n", error->plane[i].control);
6952                 seq_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
6953                 seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
6954                 seq_printf(m, "  POS: %08x\n", error->plane[i].pos);
6955                 seq_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
6956                 if (INTEL_INFO(dev)->gen >= 4) {
6957                         seq_printf(m, "  SURF: %08x\n", error->plane[i].surface);
6958                         seq_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
6959                 }
6960
6961                 seq_printf(m, "Cursor [%d]:\n", i);
6962                 seq_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
6963                 seq_printf(m, "  POS: %08x\n", error->cursor[i].position);
6964                 seq_printf(m, "  BASE: %08x\n", error->cursor[i].base);
6965         }
6966 }
6967 #endif