drivers/gpu/drm/i915/intel_dvo.c

   1 /*
   2  * Copyright 2006 Dave Airlie <airlied@linux.ie>
   3  * Copyright © 2006-2007 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *      Eric Anholt <eric@anholt.net>
  26  */
  27 #include <linux/i2c.h>
  28 #include <linux/slab.h>
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "drm_crtc.h"
  32 #include "intel_drv.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35 #include "dvo.h"
  36
  37 #define SIL164_ADDR     0x38
  38 #define CH7xxx_ADDR     0x76
  39 #define TFP410_ADDR     0x38
  40
  41 static struct intel_dvo_device intel_dvo_devices[] = {
  42         {
  43                 .type = INTEL_DVO_CHIP_TMDS,
  44                 .name = "sil164",
  45                 .dvo_reg = DVOC,
  46                 .slave_addr = SIL164_ADDR,
  47                 .dev_ops = &sil164_ops,
  48         },
  49         {
  50                 .type = INTEL_DVO_CHIP_TMDS,
  51                 .name = "ch7xxx",
  52                 .dvo_reg = DVOC,
  53                 .slave_addr = CH7xxx_ADDR,
  54                 .dev_ops = &ch7xxx_ops,
  55         },
  56         {
  57                 .type = INTEL_DVO_CHIP_LVDS,
  58                 .name = "ivch",
  59                 .dvo_reg = DVOA,
  60                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  61                 .dev_ops = &ivch_ops,
  62         },
  63         {
  64                 .type = INTEL_DVO_CHIP_TMDS,
  65                 .name = "tfp410",
  66                 .dvo_reg = DVOC,
  67                 .slave_addr = TFP410_ADDR,
  68                 .dev_ops = &tfp410_ops,
  69         },
  70         {
  71                 .type = INTEL_DVO_CHIP_LVDS,
  72                 .name = "ch7017",
  73                 .dvo_reg = DVOC,
  74                 .slave_addr = 0x75,
  75                 .gpio = GPIOE,
  76                 .dev_ops = &ch7017_ops,
  77         }
  78 };
  79
  80 static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
  81 {
  82         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
  83         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
  84         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
  85         u32 dvo_reg = dvo->dvo_reg;
  86         u32 temp = I915_READ(dvo_reg);
  87
  88         if (mode == DRM_MODE_DPMS_ON) {
  89                 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
  90                 I915_READ(dvo_reg);
  91                 dvo->dev_ops->dpms(dvo, mode);
  92         } else {
  93                 dvo->dev_ops->dpms(dvo, mode);
  94                 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
  95                 I915_READ(dvo_reg);
  96         }
  97 }
  98
  99 static void intel_dvo_save(struct drm_connector *connector)
 100 {
 101         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 102         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 103         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 104
 105         /* Each output should probably just save the registers it touches,
 106          * but for now, use more overkill.
 107          */
 108         dev_priv->saveDVOA = I915_READ(DVOA);
 109         dev_priv->saveDVOB = I915_READ(DVOB);
 110         dev_priv->saveDVOC = I915_READ(DVOC);
 111
 112         dvo->dev_ops->save(dvo);
 113 }
 114
 115 static void intel_dvo_restore(struct drm_connector *connector)
 116 {
 117         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 118         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 119         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 120
 121         dvo->dev_ops->restore(dvo);
 122
 123         I915_WRITE(DVOA, dev_priv->saveDVOA);
 124         I915_WRITE(DVOB, dev_priv->saveDVOB);
 125         I915_WRITE(DVOC, dev_priv->saveDVOC);
 126 }
 127
 128 static int intel_dvo_mode_valid(struct drm_connector *connector,
 129                                 struct drm_display_mode *mode)
 130 {
 131         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 132         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 133
 134         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 135                 return MODE_NO_DBLESCAN;
 136
 137         /* XXX: Validate clock range */
 138
 139         if (dvo->panel_fixed_mode) {
 140                 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
 141                         return MODE_PANEL;
 142                 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
 143                         return MODE_PANEL;
 144         }
 145
 146         return dvo->dev_ops->mode_valid(dvo, mode);
 147 }
 148
 149 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
 150                                  struct drm_display_mode *mode,
 151                                  struct drm_display_mode *adjusted_mode)
 152 {
 153         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
 154         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 155
 156         /* If we have timings from the BIOS for the panel, put them in
 157          * to the adjusted mode.  The CRTC will be set up for this mode,
 158          * with the panel scaling set up to source from the H/VDisplay
 159          * of the original mode.
 160          */
 161         if (dvo->panel_fixed_mode != NULL) {
 162 #define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
 163                 C(hdisplay);
 164                 C(hsync_start);
 165                 C(hsync_end);
 166                 C(htotal);
 167                 C(vdisplay);
 168                 C(vsync_start);
 169                 C(vsync_end);
 170                 C(vtotal);
 171                 C(clock);
 172                 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
 173 #undef C
 174         }
 175
 176         if (dvo->dev_ops->mode_fixup)
 177                 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
 178
 179         return true;
 180 }
 181
 182 static void intel_dvo_mode_set(struct drm_encoder *encoder,
 183                                struct drm_display_mode *mode,
 184                                struct drm_display_mode *adjusted_mode)
 185 {
 186         struct drm_device *dev = encoder->dev;
 187         struct drm_i915_private *dev_priv = dev->dev_private;
 188         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 189         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
 190         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 191         int pipe = intel_crtc->pipe;
 192         u32 dvo_val;
 193         u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
 194         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
 195
 196         switch (dvo_reg) {
 197         case DVOA:
 198         default:
 199                 dvo_srcdim_reg = DVOA_SRCDIM;
 200                 break;
 201         case DVOB:
 202                 dvo_srcdim_reg = DVOB_SRCDIM;
 203                 break;
 204         case DVOC:
 205                 dvo_srcdim_reg = DVOC_SRCDIM;
 206                 break;
 207         }
 208
 209         dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
 210
 211         /* Save the data order, since I don't know what it should be set to. */
 212         dvo_val = I915_READ(dvo_reg) &
 213                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 214         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 215                    DVO_BLANK_ACTIVE_HIGH;
 216
 217         if (pipe == 1)
 218                 dvo_val |= DVO_PIPE_B_SELECT;
 219         dvo_val |= DVO_PIPE_STALL;
 220         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 221                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 222         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 223                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 224
 225         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
 226
 227         /*I915_WRITE(DVOB_SRCDIM,
 228           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 229           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
 230         I915_WRITE(dvo_srcdim_reg,
 231                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 232                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 233         /*I915_WRITE(DVOB, dvo_val);*/
 234         I915_WRITE(dvo_reg, dvo_val);
 235 }
 236
 237 /**
 238  * Detect the output connection on our DVO device.
 239  *
 240  * Unimplemented.
 241  */
 242 static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
 243 {
 244         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 245         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 246
 247         return dvo->dev_ops->detect(dvo);
 248 }
 249
 250 static int intel_dvo_get_modes(struct drm_connector *connector)
 251 {
 252         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 253         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 254
 255         /* We should probably have an i2c driver get_modes function for those
 256          * devices which will have a fixed set of modes determined by the chip
 257          * (TV-out, for example), but for now with just TMDS and LVDS,
 258          * that's not the case.
 259          */
 260         intel_ddc_get_modes(intel_encoder);
 261         if (!list_empty(&connector->probed_modes))
 262                 return 1;
 263
 264
 265         if (dvo->panel_fixed_mode != NULL) {
 266                 struct drm_display_mode *mode;
 267                 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
 268                 if (mode) {
 269                         drm_mode_probed_add(connector, mode);
 270                         return 1;
 271                 }
 272         }
 273         return 0;
 274 }
 275
 276 static void intel_dvo_destroy (struct drm_connector *connector)
 277 {
 278         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 279         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 280
 281         if (dvo) {
 282                 if (dvo->dev_ops->destroy)
 283                         dvo->dev_ops->destroy(dvo);
 284                 if (dvo->panel_fixed_mode)
 285                         kfree(dvo->panel_fixed_mode);
 286                 /* no need, in i830_dvoices[] now */
 287                 //kfree(dvo);
 288         }
 289         if (intel_encoder->i2c_bus)
 290                 intel_i2c_destroy(intel_encoder->i2c_bus);
 291         if (intel_encoder->ddc_bus)
 292                 intel_i2c_destroy(intel_encoder->ddc_bus);
 293         drm_sysfs_connector_remove(connector);
 294         drm_connector_cleanup(connector);
 295         kfree(intel_encoder);
 296 }
 297
 298 #ifdef RANDR_GET_CRTC_INTERFACE
 299 static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
 300 {
 301         struct drm_device *dev = connector->dev;
 302         struct drm_i915_private *dev_priv = dev->dev_private;
 303         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 304         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 305         int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
 306
 307         return intel_pipe_to_crtc(pScrn, pipe);
 308 }
 309 #endif
 310
 311 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 312         .dpms = intel_dvo_dpms,
 313         .mode_fixup = intel_dvo_mode_fixup,
 314         .prepare = intel_encoder_prepare,
 315         .mode_set = intel_dvo_mode_set,
 316         .commit = intel_encoder_commit,
 317 };
 318
 319 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 320         .dpms = drm_helper_connector_dpms,
 321         .save = intel_dvo_save,
 322         .restore = intel_dvo_restore,
 323         .detect = intel_dvo_detect,
 324         .destroy = intel_dvo_destroy,
 325         .fill_modes = drm_helper_probe_single_connector_modes,
 326 };
 327
 328 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 329         .mode_valid = intel_dvo_mode_valid,
 330         .get_modes = intel_dvo_get_modes,
 331         .best_encoder = intel_best_encoder,
 332 };
 333
 334 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 335 {
 336         drm_encoder_cleanup(encoder);
 337 }
 338
 339 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 340         .destroy = intel_dvo_enc_destroy,
 341 };
 342
 343
 344 /**
 345  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 346  *
 347  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 348  * chip being on DVOB/C and having multiple pipes.
 349  */
 350 static struct drm_display_mode *
 351 intel_dvo_get_current_mode (struct drm_connector *connector)
 352 {
 353         struct drm_device *dev = connector->dev;
 354         struct drm_i915_private *dev_priv = dev->dev_private;
 355         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 356         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 357         uint32_t dvo_reg = dvo->dvo_reg;
 358         uint32_t dvo_val = I915_READ(dvo_reg);
 359         struct drm_display_mode *mode = NULL;
 360
 361         /* If the DVO port is active, that'll be the LVDS, so we can pull out
 362          * its timings to get how the BIOS set up the panel.
 363          */
 364         if (dvo_val & DVO_ENABLE) {
 365                 struct drm_crtc *crtc;
 366                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 367
 368                 crtc = intel_get_crtc_from_pipe(dev, pipe);
 369                 if (crtc) {
 370                         mode = intel_crtc_mode_get(dev, crtc);
 371
 372                         if (mode) {
 373                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 374                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
 375                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
 376                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
 377                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
 378                         }
 379                 }
 380         }
 381         return mode;
 382 }
 383
 384 void intel_dvo_init(struct drm_device *dev)
 385 {
 386         struct intel_encoder *intel_encoder;
 387         struct intel_dvo_device *dvo;
 388         struct i2c_adapter *i2cbus = NULL;
 389         int ret = 0;
 390         int i;
 391         int encoder_type = DRM_MODE_ENCODER_NONE;
 392         intel_encoder = kzalloc (sizeof(struct intel_encoder), GFP_KERNEL);
 393         if (!intel_encoder)
 394                 return;
 395
 396         /* Set up the DDC bus */
 397         intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
 398         if (!intel_encoder->ddc_bus)
 399                 goto free_intel;
 400
 401         /* Now, try to find a controller */
 402         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 403                 struct drm_connector *connector = &intel_encoder->base;
 404                 int gpio;
 405
 406                 dvo = &intel_dvo_devices[i];
 407
 408                 /* Allow the I2C driver info to specify the GPIO to be used in
 409                  * special cases, but otherwise default to what's defined
 410                  * in the spec.
 411                  */
 412                 if (dvo->gpio != 0)
 413                         gpio = dvo->gpio;
 414                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 415                         gpio = GPIOB;
 416                 else
 417                         gpio = GPIOE;
 418
 419                 /* Set up the I2C bus necessary for the chip we're probing.
 420                  * It appears that everything is on GPIOE except for panels
 421                  * on i830 laptops, which are on GPIOB (DVOA).
 422                  */
 423                 if (i2cbus != NULL)
 424                         intel_i2c_destroy(i2cbus);
 425                 if (!(i2cbus = intel_i2c_create(dev, gpio,
 426                         gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
 427                         continue;
 428                 }
 429
 430                 if (dvo->dev_ops!= NULL)
 431                         ret = dvo->dev_ops->init(dvo, i2cbus);
 432                 else
 433                         ret = false;
 434
 435                 if (!ret)
 436                         continue;
 437
 438                 intel_encoder->type = INTEL_OUTPUT_DVO;
 439                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 440                 switch (dvo->type) {
 441                 case INTEL_DVO_CHIP_TMDS:
 442                         intel_encoder->clone_mask =
 443                                 (1 << INTEL_DVO_TMDS_CLONE_BIT) |
 444                                 (1 << INTEL_ANALOG_CLONE_BIT);
 445                         drm_connector_init(dev, connector,
 446                                            &intel_dvo_connector_funcs,
 447                                            DRM_MODE_CONNECTOR_DVII);
 448                         encoder_type = DRM_MODE_ENCODER_TMDS;
 449                         break;
 450                 case INTEL_DVO_CHIP_LVDS:
 451                         intel_encoder->clone_mask =
 452                                 (1 << INTEL_DVO_LVDS_CLONE_BIT);
 453                         drm_connector_init(dev, connector,
 454                                            &intel_dvo_connector_funcs,
 455                                            DRM_MODE_CONNECTOR_LVDS);
 456                         encoder_type = DRM_MODE_ENCODER_LVDS;
 457                         break;
 458                 }
 459
 460                 drm_connector_helper_add(connector,
 461                                          &intel_dvo_connector_helper_funcs);
 462                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 463                 connector->interlace_allowed = false;
 464                 connector->doublescan_allowed = false;
 465
 466                 intel_encoder->dev_priv = dvo;
 467                 intel_encoder->i2c_bus = i2cbus;
 468
 469                 drm_encoder_init(dev, &intel_encoder->enc,
 470                                  &intel_dvo_enc_funcs, encoder_type);
 471                 drm_encoder_helper_add(&intel_encoder->enc,
 472                                        &intel_dvo_helper_funcs);
 473
 474                 drm_mode_connector_attach_encoder(&intel_encoder->base,
 475                                                   &intel_encoder->enc);
 476                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 477                         /* For our LVDS chipsets, we should hopefully be able
 478                          * to dig the fixed panel mode out of the BIOS data.
 479                          * However, it's in a different format from the BIOS
 480                          * data on chipsets with integrated LVDS (stored in AIM
 481                          * headers, likely), so for now, just get the current
 482                          * mode being output through DVO.
 483                          */
 484                         dvo->panel_fixed_mode =
 485                                 intel_dvo_get_current_mode(connector);
 486                         dvo->panel_wants_dither = true;
 487                 }
 488
 489                 drm_sysfs_connector_add(connector);
 490                 return;
 491         }
 492
 493         intel_i2c_destroy(intel_encoder->ddc_bus);
 494         /* Didn't find a chip, so tear down. */
 495         if (i2cbus != NULL)
 496                 intel_i2c_destroy(i2cbus);
 497 free_intel:
 498         kfree(intel_encoder);
 499 }