drivers/gpu/drm/i915/i915_suspend.c

   1 /*
   2  *
   3  * Copyright 2008 (c) Intel Corporation
   4  *   Jesse Barnes <jbarnes@virtuousgeek.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm.h"
  29 #include "i915_drm.h"
  30 #include "intel_drv.h"
  31
  32 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
  33 {
  34         struct drm_i915_private *dev_priv = dev->dev_private;
  35         u32     dpll_reg;
  36
  37         if (HAS_PCH_SPLIT(dev)) {
  38                 dpll_reg = (pipe == PIPE_A) ? PCH_DPLL_A: PCH_DPLL_B;
  39         } else {
  40                 dpll_reg = (pipe == PIPE_A) ? DPLL_A: DPLL_B;
  41         }
  42
  43         return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
  44 }
  45
  46 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
  47 {
  48         struct drm_i915_private *dev_priv = dev->dev_private;
  49         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  50         u32 *array;
  51         int i;
  52
  53         if (!i915_pipe_enabled(dev, pipe))
  54                 return;
  55
  56         if (HAS_PCH_SPLIT(dev))
  57                 reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
  58
  59         if (pipe == PIPE_A)
  60                 array = dev_priv->save_palette_a;
  61         else
  62                 array = dev_priv->save_palette_b;
  63
  64         for(i = 0; i < 256; i++)
  65                 array[i] = I915_READ(reg + (i << 2));
  66 }
  67
  68 static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
  69 {
  70         struct drm_i915_private *dev_priv = dev->dev_private;
  71         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  72         u32 *array;
  73         int i;
  74
  75         if (!i915_pipe_enabled(dev, pipe))
  76                 return;
  77
  78         if (HAS_PCH_SPLIT(dev))
  79                 reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
  80
  81         if (pipe == PIPE_A)
  82                 array = dev_priv->save_palette_a;
  83         else
  84                 array = dev_priv->save_palette_b;
  85
  86         for(i = 0; i < 256; i++)
  87                 I915_WRITE(reg + (i << 2), array[i]);
  88 }
  89
  90 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
  91 {
  92         struct drm_i915_private *dev_priv = dev->dev_private;
  93
  94         I915_WRITE8(index_port, reg);
  95         return I915_READ8(data_port);
  96 }
  97
  98 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
  99 {
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101
 102         I915_READ8(st01);
 103         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 104         return I915_READ8(VGA_AR_DATA_READ);
 105 }
 106
 107 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
 108 {
 109         struct drm_i915_private *dev_priv = dev->dev_private;
 110
 111         I915_READ8(st01);
 112         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 113         I915_WRITE8(VGA_AR_DATA_WRITE, val);
 114 }
 115
 116 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
 117 {
 118         struct drm_i915_private *dev_priv = dev->dev_private;
 119
 120         I915_WRITE8(index_port, reg);
 121         I915_WRITE8(data_port, val);
 122 }
 123
 124 static void i915_save_vga(struct drm_device *dev)
 125 {
 126         struct drm_i915_private *dev_priv = dev->dev_private;
 127         int i;
 128         u16 cr_index, cr_data, st01;
 129
 130         /* VGA color palette registers */
 131         dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
 132
 133         /* MSR bits */
 134         dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
 135         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 136                 cr_index = VGA_CR_INDEX_CGA;
 137                 cr_data = VGA_CR_DATA_CGA;
 138                 st01 = VGA_ST01_CGA;
 139         } else {
 140                 cr_index = VGA_CR_INDEX_MDA;
 141                 cr_data = VGA_CR_DATA_MDA;
 142                 st01 = VGA_ST01_MDA;
 143         }
 144
 145         /* CRT controller regs */
 146         i915_write_indexed(dev, cr_index, cr_data, 0x11,
 147                            i915_read_indexed(dev, cr_index, cr_data, 0x11) &
 148                            (~0x80));
 149         for (i = 0; i <= 0x24; i++)
 150                 dev_priv->saveCR[i] =
 151                         i915_read_indexed(dev, cr_index, cr_data, i);
 152         /* Make sure we don't turn off CR group 0 writes */
 153         dev_priv->saveCR[0x11] &= ~0x80;
 154
 155         /* Attribute controller registers */
 156         I915_READ8(st01);
 157         dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
 158         for (i = 0; i <= 0x14; i++)
 159                 dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
 160         I915_READ8(st01);
 161         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
 162         I915_READ8(st01);
 163
 164         /* Graphics controller registers */
 165         for (i = 0; i < 9; i++)
 166                 dev_priv->saveGR[i] =
 167                         i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
 168
 169         dev_priv->saveGR[0x10] =
 170                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
 171         dev_priv->saveGR[0x11] =
 172                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
 173         dev_priv->saveGR[0x18] =
 174                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
 175
 176         /* Sequencer registers */
 177         for (i = 0; i < 8; i++)
 178                 dev_priv->saveSR[i] =
 179                         i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
 180 }
 181
 182 static void i915_restore_vga(struct drm_device *dev)
 183 {
 184         struct drm_i915_private *dev_priv = dev->dev_private;
 185         int i;
 186         u16 cr_index, cr_data, st01;
 187
 188         /* MSR bits */
 189         I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
 190         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 191                 cr_index = VGA_CR_INDEX_CGA;
 192                 cr_data = VGA_CR_DATA_CGA;
 193                 st01 = VGA_ST01_CGA;
 194         } else {
 195                 cr_index = VGA_CR_INDEX_MDA;
 196                 cr_data = VGA_CR_DATA_MDA;
 197                 st01 = VGA_ST01_MDA;
 198         }
 199
 200         /* Sequencer registers, don't write SR07 */
 201         for (i = 0; i < 7; i++)
 202                 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
 203                                    dev_priv->saveSR[i]);
 204
 205         /* CRT controller regs */
 206         /* Enable CR group 0 writes */
 207         i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
 208         for (i = 0; i <= 0x24; i++)
 209                 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
 210
 211         /* Graphics controller regs */
 212         for (i = 0; i < 9; i++)
 213                 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
 214                                    dev_priv->saveGR[i]);
 215
 216         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
 217                            dev_priv->saveGR[0x10]);
 218         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
 219                            dev_priv->saveGR[0x11]);
 220         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
 221                            dev_priv->saveGR[0x18]);
 222
 223         /* Attribute controller registers */
 224         I915_READ8(st01); /* switch back to index mode */
 225         for (i = 0; i <= 0x14; i++)
 226                 i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
 227         I915_READ8(st01); /* switch back to index mode */
 228         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
 229         I915_READ8(st01);
 230
 231         /* VGA color palette registers */
 232         I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
 233 }
 234
 235 static void i915_save_modeset_reg(struct drm_device *dev)
 236 {
 237         struct drm_i915_private *dev_priv = dev->dev_private;
 238
 239         if (drm_core_check_feature(dev, DRIVER_MODESET))
 240                 return;
 241
 242         if (HAS_PCH_SPLIT(dev)) {
 243                 dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
 244                 dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
 245         }
 246
 247         /* Pipe & plane A info */
 248         dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
 249         dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
 250         if (HAS_PCH_SPLIT(dev)) {
 251                 dev_priv->saveFPA0 = I915_READ(PCH_FPA0);
 252                 dev_priv->saveFPA1 = I915_READ(PCH_FPA1);
 253                 dev_priv->saveDPLL_A = I915_READ(PCH_DPLL_A);
 254         } else {
 255                 dev_priv->saveFPA0 = I915_READ(FPA0);
 256                 dev_priv->saveFPA1 = I915_READ(FPA1);
 257                 dev_priv->saveDPLL_A = I915_READ(DPLL_A);
 258         }
 259         if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev))
 260                 dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
 261         dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
 262         dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
 263         dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
 264         dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
 265         dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
 266         dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
 267         if (!HAS_PCH_SPLIT(dev))
 268                 dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
 269
 270         if (HAS_PCH_SPLIT(dev)) {
 271                 dev_priv->savePIPEA_DATA_M1 = I915_READ(PIPEA_DATA_M1);
 272                 dev_priv->savePIPEA_DATA_N1 = I915_READ(PIPEA_DATA_N1);
 273                 dev_priv->savePIPEA_LINK_M1 = I915_READ(PIPEA_LINK_M1);
 274                 dev_priv->savePIPEA_LINK_N1 = I915_READ(PIPEA_LINK_N1);
 275
 276                 dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
 277                 dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);
 278
 279                 dev_priv->savePFA_CTL_1 = I915_READ(PFA_CTL_1);
 280                 dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
 281                 dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);
 282
 283                 dev_priv->saveTRANSACONF = I915_READ(TRANSACONF);
 284                 dev_priv->saveTRANS_HTOTAL_A = I915_READ(TRANS_HTOTAL_A);
 285                 dev_priv->saveTRANS_HBLANK_A = I915_READ(TRANS_HBLANK_A);
 286                 dev_priv->saveTRANS_HSYNC_A = I915_READ(TRANS_HSYNC_A);
 287                 dev_priv->saveTRANS_VTOTAL_A = I915_READ(TRANS_VTOTAL_A);
 288                 dev_priv->saveTRANS_VBLANK_A = I915_READ(TRANS_VBLANK_A);
 289                 dev_priv->saveTRANS_VSYNC_A = I915_READ(TRANS_VSYNC_A);
 290         }
 291
 292         dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
 293         dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
 294         dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
 295         dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
 296         dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
 297         if (IS_I965G(dev)) {
 298                 dev_priv->saveDSPASURF = I915_READ(DSPASURF);
 299                 dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
 300         }
 301         i915_save_palette(dev, PIPE_A);
 302         dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);
 303
 304         /* Pipe & plane B info */
 305         dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
 306         dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
 307         if (HAS_PCH_SPLIT(dev)) {
 308                 dev_priv->saveFPB0 = I915_READ(PCH_FPB0);
 309                 dev_priv->saveFPB1 = I915_READ(PCH_FPB1);
 310                 dev_priv->saveDPLL_B = I915_READ(PCH_DPLL_B);
 311         } else {
 312                 dev_priv->saveFPB0 = I915_READ(FPB0);
 313                 dev_priv->saveFPB1 = I915_READ(FPB1);
 314                 dev_priv->saveDPLL_B = I915_READ(DPLL_B);
 315         }
 316         if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev))
 317                 dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
 318         dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
 319         dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
 320         dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
 321         dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
 322         dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
 323         dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
 324         if (!HAS_PCH_SPLIT(dev))
 325                 dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);
 326
 327         if (HAS_PCH_SPLIT(dev)) {
 328                 dev_priv->savePIPEB_DATA_M1 = I915_READ(PIPEB_DATA_M1);
 329                 dev_priv->savePIPEB_DATA_N1 = I915_READ(PIPEB_DATA_N1);
 330                 dev_priv->savePIPEB_LINK_M1 = I915_READ(PIPEB_LINK_M1);
 331                 dev_priv->savePIPEB_LINK_N1 = I915_READ(PIPEB_LINK_N1);
 332
 333                 dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
 334                 dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
 335
 336                 dev_priv->savePFB_CTL_1 = I915_READ(PFB_CTL_1);
 337                 dev_priv->savePFB_WIN_SZ = I915_READ(PFB_WIN_SZ);
 338                 dev_priv->savePFB_WIN_POS = I915_READ(PFB_WIN_POS);
 339
 340                 dev_priv->saveTRANSBCONF = I915_READ(TRANSBCONF);
 341                 dev_priv->saveTRANS_HTOTAL_B = I915_READ(TRANS_HTOTAL_B);
 342                 dev_priv->saveTRANS_HBLANK_B = I915_READ(TRANS_HBLANK_B);
 343                 dev_priv->saveTRANS_HSYNC_B = I915_READ(TRANS_HSYNC_B);
 344                 dev_priv->saveTRANS_VTOTAL_B = I915_READ(TRANS_VTOTAL_B);
 345                 dev_priv->saveTRANS_VBLANK_B = I915_READ(TRANS_VBLANK_B);
 346                 dev_priv->saveTRANS_VSYNC_B = I915_READ(TRANS_VSYNC_B);
 347         }
 348
 349         dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
 350         dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
 351         dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
 352         dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
 353         dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
 354         if (IS_I965GM(dev) || IS_GM45(dev)) {
 355                 dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
 356                 dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
 357         }
 358         i915_save_palette(dev, PIPE_B);
 359         dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
 360         return;
 361 }
 362
 363 static void i915_restore_modeset_reg(struct drm_device *dev)
 364 {
 365         struct drm_i915_private *dev_priv = dev->dev_private;
 366         int dpll_a_reg, fpa0_reg, fpa1_reg;
 367         int dpll_b_reg, fpb0_reg, fpb1_reg;
 368
 369         if (drm_core_check_feature(dev, DRIVER_MODESET))
 370                 return;
 371
 372         if (HAS_PCH_SPLIT(dev)) {
 373                 dpll_a_reg = PCH_DPLL_A;
 374                 dpll_b_reg = PCH_DPLL_B;
 375                 fpa0_reg = PCH_FPA0;
 376                 fpb0_reg = PCH_FPB0;
 377                 fpa1_reg = PCH_FPA1;
 378                 fpb1_reg = PCH_FPB1;
 379         } else {
 380                 dpll_a_reg = DPLL_A;
 381                 dpll_b_reg = DPLL_B;
 382                 fpa0_reg = FPA0;
 383                 fpb0_reg = FPB0;
 384                 fpa1_reg = FPA1;
 385                 fpb1_reg = FPB1;
 386         }
 387
 388         if (HAS_PCH_SPLIT(dev)) {
 389                 I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
 390                 I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
 391         }
 392
 393         /* Pipe & plane A info */
 394         /* Prime the clock */
 395         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
 396                 I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A &
 397                            ~DPLL_VCO_ENABLE);
 398                 POSTING_READ(dpll_a_reg);
 399                 udelay(150);
 400         }
 401         I915_WRITE(fpa0_reg, dev_priv->saveFPA0);
 402         I915_WRITE(fpa1_reg, dev_priv->saveFPA1);
 403         /* Actually enable it */
 404         I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A);
 405         POSTING_READ(dpll_a_reg);
 406         udelay(150);
 407         if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev)) {
 408                 I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
 409                 POSTING_READ(DPLL_A_MD);
 410         }
 411         udelay(150);
 412
 413         /* Restore mode */
 414         I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
 415         I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
 416         I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
 417         I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
 418         I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
 419         I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
 420         if (!HAS_PCH_SPLIT(dev))
 421                 I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
 422
 423         if (HAS_PCH_SPLIT(dev)) {
 424                 I915_WRITE(PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
 425                 I915_WRITE(PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
 426                 I915_WRITE(PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
 427                 I915_WRITE(PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
 428
 429                 I915_WRITE(FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
 430                 I915_WRITE(FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
 431
 432                 I915_WRITE(PFA_CTL_1, dev_priv->savePFA_CTL_1);
 433                 I915_WRITE(PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
 434                 I915_WRITE(PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
 435
 436                 I915_WRITE(TRANSACONF, dev_priv->saveTRANSACONF);
 437                 I915_WRITE(TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
 438                 I915_WRITE(TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
 439                 I915_WRITE(TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
 440                 I915_WRITE(TRANS_VTOTAL_A, dev_priv->saveTRANS_VTOTAL_A);
 441                 I915_WRITE(TRANS_VBLANK_A, dev_priv->saveTRANS_VBLANK_A);
 442                 I915_WRITE(TRANS_VSYNC_A, dev_priv->saveTRANS_VSYNC_A);
 443         }
 444
 445         /* Restore plane info */
 446         I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
 447         I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
 448         I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
 449         I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
 450         I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
 451         if (IS_I965G(dev)) {
 452                 I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
 453                 I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
 454         }
 455
 456         I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);
 457
 458         i915_restore_palette(dev, PIPE_A);
 459         /* Enable the plane */
 460         I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
 461         I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));
 462
 463         /* Pipe & plane B info */
 464         if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
 465                 I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B &
 466                            ~DPLL_VCO_ENABLE);
 467                 POSTING_READ(dpll_b_reg);
 468                 udelay(150);
 469         }
 470         I915_WRITE(fpb0_reg, dev_priv->saveFPB0);
 471         I915_WRITE(fpb1_reg, dev_priv->saveFPB1);
 472         /* Actually enable it */
 473         I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
 474         POSTING_READ(dpll_b_reg);
 475         udelay(150);
 476         if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev)) {
 477                 I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
 478                 POSTING_READ(DPLL_B_MD);
 479         }
 480         udelay(150);
 481
 482         /* Restore mode */
 483         I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
 484         I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
 485         I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
 486         I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
 487         I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
 488         I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
 489         if (!HAS_PCH_SPLIT(dev))
 490                 I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
 491
 492         if (HAS_PCH_SPLIT(dev)) {
 493                 I915_WRITE(PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
 494                 I915_WRITE(PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
 495                 I915_WRITE(PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
 496                 I915_WRITE(PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
 497
 498                 I915_WRITE(FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
 499                 I915_WRITE(FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
 500
 501                 I915_WRITE(PFB_CTL_1, dev_priv->savePFB_CTL_1);
 502                 I915_WRITE(PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
 503                 I915_WRITE(PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
 504
 505                 I915_WRITE(TRANSBCONF, dev_priv->saveTRANSBCONF);
 506                 I915_WRITE(TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
 507                 I915_WRITE(TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
 508                 I915_WRITE(TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
 509                 I915_WRITE(TRANS_VTOTAL_B, dev_priv->saveTRANS_VTOTAL_B);
 510                 I915_WRITE(TRANS_VBLANK_B, dev_priv->saveTRANS_VBLANK_B);
 511                 I915_WRITE(TRANS_VSYNC_B, dev_priv->saveTRANS_VSYNC_B);
 512         }
 513
 514         /* Restore plane info */
 515         I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
 516         I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
 517         I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
 518         I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
 519         I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
 520         if (IS_I965G(dev)) {
 521                 I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
 522                 I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
 523         }
 524
 525         I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);
 526
 527         i915_restore_palette(dev, PIPE_B);
 528         /* Enable the plane */
 529         I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
 530         I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));
 531
 532         return;
 533 }
 534
 535 void i915_save_display(struct drm_device *dev)
 536 {
 537         struct drm_i915_private *dev_priv = dev->dev_private;
 538
 539         /* Display arbitration control */
 540         dev_priv->saveDSPARB = I915_READ(DSPARB);
 541
 542         /* This is only meaningful in non-KMS mode */
 543         /* Don't save them in KMS mode */
 544         i915_save_modeset_reg(dev);
 545
 546         /* Cursor state */
 547         dev_priv->saveCURACNTR = I915_READ(CURACNTR);
 548         dev_priv->saveCURAPOS = I915_READ(CURAPOS);
 549         dev_priv->saveCURABASE = I915_READ(CURABASE);
 550         dev_priv->saveCURBCNTR = I915_READ(CURBCNTR);
 551         dev_priv->saveCURBPOS = I915_READ(CURBPOS);
 552         dev_priv->saveCURBBASE = I915_READ(CURBBASE);
 553         if (!IS_I9XX(dev))
 554                 dev_priv->saveCURSIZE = I915_READ(CURSIZE);
 555
 556         /* CRT state */
 557         if (HAS_PCH_SPLIT(dev)) {
 558                 dev_priv->saveADPA = I915_READ(PCH_ADPA);
 559         } else {
 560                 dev_priv->saveADPA = I915_READ(ADPA);
 561         }
 562
 563         /* LVDS state */
 564         if (HAS_PCH_SPLIT(dev)) {
 565                 dev_priv->savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
 566                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
 567                 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
 568                 dev_priv->saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
 569                 dev_priv->saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
 570                 dev_priv->saveLVDS = I915_READ(PCH_LVDS);
 571         } else {
 572                 dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
 573                 dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 574                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
 575                 dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
 576                 if (IS_I965G(dev))
 577                         dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
 578                 if (IS_MOBILE(dev) && !IS_I830(dev))
 579                         dev_priv->saveLVDS = I915_READ(LVDS);
 580         }
 581
 582         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 583                 dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 584
 585         if (HAS_PCH_SPLIT(dev)) {
 586                 dev_priv->savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
 587                 dev_priv->savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
 588                 dev_priv->savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
 589         } else {
 590                 dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
 591                 dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
 592                 dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
 593         }
 594
 595         /* Display Port state */
 596         if (SUPPORTS_INTEGRATED_DP(dev)) {
 597                 dev_priv->saveDP_B = I915_READ(DP_B);
 598                 dev_priv->saveDP_C = I915_READ(DP_C);
 599                 dev_priv->saveDP_D = I915_READ(DP_D);
 600                 dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(PIPEA_GMCH_DATA_M);
 601                 dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(PIPEB_GMCH_DATA_M);
 602                 dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(PIPEA_GMCH_DATA_N);
 603                 dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(PIPEB_GMCH_DATA_N);
 604                 dev_priv->savePIPEA_DP_LINK_M = I915_READ(PIPEA_DP_LINK_M);
 605                 dev_priv->savePIPEB_DP_LINK_M = I915_READ(PIPEB_DP_LINK_M);
 606                 dev_priv->savePIPEA_DP_LINK_N = I915_READ(PIPEA_DP_LINK_N);
 607                 dev_priv->savePIPEB_DP_LINK_N = I915_READ(PIPEB_DP_LINK_N);
 608         }
 609         /* FIXME: save TV & SDVO state */
 610
 611         /* Only save FBC state on the platform that supports FBC */
 612         if (I915_HAS_FBC(dev)) {
 613                 if (HAS_PCH_SPLIT(dev)) {
 614                         dev_priv->saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE);
 615                 } else if (IS_GM45(dev)) {
 616                         dev_priv->saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE);
 617                 } else {
 618                         dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
 619                         dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
 620                         dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
 621                         dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
 622                 }
 623         }
 624
 625         /* VGA state */
 626         dev_priv->saveVGA0 = I915_READ(VGA0);
 627         dev_priv->saveVGA1 = I915_READ(VGA1);
 628         dev_priv->saveVGA_PD = I915_READ(VGA_PD);
 629         if (HAS_PCH_SPLIT(dev))
 630                 dev_priv->saveVGACNTRL = I915_READ(CPU_VGACNTRL);
 631         else
 632                 dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
 633
 634         i915_save_vga(dev);
 635 }
 636
 637 void i915_restore_display(struct drm_device *dev)
 638 {
 639         struct drm_i915_private *dev_priv = dev->dev_private;
 640
 641         /* Display arbitration */
 642         I915_WRITE(DSPARB, dev_priv->saveDSPARB);
 643
 644         /* Display port ratios (must be done before clock is set) */
 645         if (SUPPORTS_INTEGRATED_DP(dev)) {
 646                 I915_WRITE(PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
 647                 I915_WRITE(PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
 648                 I915_WRITE(PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
 649                 I915_WRITE(PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
 650                 I915_WRITE(PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
 651                 I915_WRITE(PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
 652                 I915_WRITE(PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
 653                 I915_WRITE(PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
 654         }
 655
 656         /* This is only meaningful in non-KMS mode */
 657         /* Don't restore them in KMS mode */
 658         i915_restore_modeset_reg(dev);
 659
 660         /* Cursor state */
 661         I915_WRITE(CURAPOS, dev_priv->saveCURAPOS);
 662         I915_WRITE(CURACNTR, dev_priv->saveCURACNTR);
 663         I915_WRITE(CURABASE, dev_priv->saveCURABASE);
 664         I915_WRITE(CURBPOS, dev_priv->saveCURBPOS);
 665         I915_WRITE(CURBCNTR, dev_priv->saveCURBCNTR);
 666         I915_WRITE(CURBBASE, dev_priv->saveCURBBASE);
 667         if (!IS_I9XX(dev))
 668                 I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);
 669
 670         /* CRT state */
 671         if (HAS_PCH_SPLIT(dev))
 672                 I915_WRITE(PCH_ADPA, dev_priv->saveADPA);
 673         else
 674                 I915_WRITE(ADPA, dev_priv->saveADPA);
 675
 676         /* LVDS state */
 677         if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev))
 678                 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
 679
 680         if (HAS_PCH_SPLIT(dev)) {
 681                 I915_WRITE(PCH_LVDS, dev_priv->saveLVDS);
 682         } else if (IS_MOBILE(dev) && !IS_I830(dev))
 683                 I915_WRITE(LVDS, dev_priv->saveLVDS);
 684
 685         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 686                 I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
 687
 688         if (HAS_PCH_SPLIT(dev)) {
 689                 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->saveBLC_PWM_CTL);
 690                 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->saveBLC_PWM_CTL2);
 691                 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->saveBLC_CPU_PWM_CTL);
 692                 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->saveBLC_CPU_PWM_CTL2);
 693                 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 694                 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 695                 I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
 696                 I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
 697                 I915_WRITE(MCHBAR_RENDER_STANDBY,
 698                            dev_priv->saveMCHBAR_RENDER_STANDBY);
 699         } else {
 700                 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
 701                 I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
 702                 I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL);
 703                 I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 704                 I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 705                 I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
 706                 I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
 707         }
 708
 709         /* Display Port state */
 710         if (SUPPORTS_INTEGRATED_DP(dev)) {
 711                 I915_WRITE(DP_B, dev_priv->saveDP_B);
 712                 I915_WRITE(DP_C, dev_priv->saveDP_C);
 713                 I915_WRITE(DP_D, dev_priv->saveDP_D);
 714         }
 715         /* FIXME: restore TV & SDVO state */
 716
 717         /* only restore FBC info on the platform that supports FBC*/
 718         if (I915_HAS_FBC(dev)) {
 719                 if (HAS_PCH_SPLIT(dev)) {
 720                         ironlake_disable_fbc(dev);
 721                         I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 722                 } else if (IS_GM45(dev)) {
 723                         g4x_disable_fbc(dev);
 724                         I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 725                 } else {
 726                         i8xx_disable_fbc(dev);
 727                         I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 728                         I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 729                         I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
 730                         I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
 731                 }
 732         }
 733         /* VGA state */
 734         if (HAS_PCH_SPLIT(dev))
 735                 I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
 736         else
 737                 I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
 738         I915_WRITE(VGA0, dev_priv->saveVGA0);
 739         I915_WRITE(VGA1, dev_priv->saveVGA1);
 740         I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
 741         POSTING_READ(VGA_PD);
 742         udelay(150);
 743
 744         i915_restore_vga(dev);
 745 }
 746
 747 int i915_save_state(struct drm_device *dev)
 748 {
 749         struct drm_i915_private *dev_priv = dev->dev_private;
 750         int i;
 751
 752         pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
 753
 754         /* Hardware status page */
 755         dev_priv->saveHWS = I915_READ(HWS_PGA);
 756
 757         i915_save_display(dev);
 758
 759         /* Interrupt state */
 760         if (HAS_PCH_SPLIT(dev)) {
 761                 dev_priv->saveDEIER = I915_READ(DEIER);
 762                 dev_priv->saveDEIMR = I915_READ(DEIMR);
 763                 dev_priv->saveGTIER = I915_READ(GTIER);
 764                 dev_priv->saveGTIMR = I915_READ(GTIMR);
 765                 dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
 766                 dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
 767                 dev_priv->saveMCHBAR_RENDER_STANDBY =
 768                         I915_READ(MCHBAR_RENDER_STANDBY);
 769         } else {
 770                 dev_priv->saveIER = I915_READ(IER);
 771                 dev_priv->saveIMR = I915_READ(IMR);
 772         }
 773
 774         if (HAS_PCH_SPLIT(dev))
 775                 ironlake_disable_drps(dev);
 776
 777         /* Cache mode state */
 778         dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
 779
 780         /* Memory Arbitration state */
 781         dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
 782
 783         /* Scratch space */
 784         for (i = 0; i < 16; i++) {
 785                 dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
 786                 dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
 787         }
 788         for (i = 0; i < 3; i++)
 789                 dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
 790
 791         /* Fences */
 792         switch (INTEL_INFO(dev)->gen) {
 793         case 6:
 794                 for (i = 0; i < 16; i++)
 795                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
 796                 break;
 797         case 5:
 798         case 4:
 799                 for (i = 0; i < 16; i++)
 800                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
 801                 break;
 802         case 3:
 803                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 804                         for (i = 0; i < 8; i++)
 805                                 dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
 806         case 2:
 807                 for (i = 0; i < 8; i++)
 808                         dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
 809                 break;
 810
 811         }
 812
 813         return 0;
 814 }
 815
 816 int i915_restore_state(struct drm_device *dev)
 817 {
 818         struct drm_i915_private *dev_priv = dev->dev_private;
 819         int i;
 820
 821         pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
 822
 823         /* Hardware status page */
 824         I915_WRITE(HWS_PGA, dev_priv->saveHWS);
 825
 826         /* Fences */
 827         switch (INTEL_INFO(dev)->gen) {
 828         case 6:
 829                 for (i = 0; i < 16; i++)
 830                         I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (i * 8), dev_priv->saveFENCE[i]);
 831                 break;
 832         case 5:
 833         case 4:
 834                 for (i = 0; i < 16; i++)
 835                         I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
 836                 break;
 837         case 3:
 838         case 2:
 839                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 840                         for (i = 0; i < 8; i++)
 841                                 I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
 842                 for (i = 0; i < 8; i++)
 843                         I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
 844                 break;
 845         }
 846
 847         i915_restore_display(dev);
 848
 849         /* Interrupt state */
 850         if (HAS_PCH_SPLIT(dev)) {
 851                 I915_WRITE(DEIER, dev_priv->saveDEIER);
 852                 I915_WRITE(DEIMR, dev_priv->saveDEIMR);
 853                 I915_WRITE(GTIER, dev_priv->saveGTIER);
 854                 I915_WRITE(GTIMR, dev_priv->saveGTIMR);
 855                 I915_WRITE(FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
 856                 I915_WRITE(FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
 857         } else {
 858                 I915_WRITE (IER, dev_priv->saveIER);
 859                 I915_WRITE (IMR,  dev_priv->saveIMR);
 860         }
 861
 862         /* Clock gating state */
 863         intel_init_clock_gating(dev);
 864
 865         if (HAS_PCH_SPLIT(dev))
 866                 ironlake_enable_drps(dev);
 867
 868         /* Cache mode state */
 869         I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
 870
 871         /* Memory arbitration state */
 872         I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
 873
 874         for (i = 0; i < 16; i++) {
 875                 I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
 876                 I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i]);
 877         }
 878         for (i = 0; i < 3; i++)
 879                 I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
 880
 881         intel_i2c_reset(dev);
 882
 883         return 0;
 884 }