sys/dev/drm/i915/intel_lvds.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
   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  *      Dave Airlie <airlied@linux.ie>
  27  *      Jesse Barnes <jesse.barnes@intel.com>
  28  */
  29
  30 #include <linux/dmi.h>
  31 #include <linux/i2c.h>
  32 #include <drm/drmP.h>
  33 #include <drm/drm_atomic_helper.h>
  34 #include <drm/drm_crtc.h>
  35 #include <drm/drm_edid.h>
  36 #include "intel_drv.h"
  37 #include <drm/i915_drm.h>
  38 #include "i915_drv.h"
  39
  40 /* Private structure for the integrated LVDS support */
  41 struct intel_lvds_connector {
  42         struct intel_connector base;
  43
  44         struct notifier_block lid_notifier;
  45 };
  46
  47 struct intel_lvds_encoder {
  48         struct intel_encoder base;
  49
  50         bool is_dual_link;
  51         i915_reg_t reg;
  52         u32 a3_power;
  53
  54         struct intel_lvds_connector *attached_connector;
  55 };
  56
  57 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
  58 {
  59         return container_of(encoder, struct intel_lvds_encoder, base.base);
  60 }
  61
  62 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
  63 {
  64         return container_of(connector, struct intel_lvds_connector, base.base);
  65 }
  66
  67 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
  68                                     enum i915_pipe *pipe)
  69 {
  70         struct drm_device *dev = encoder->base.dev;
  71         struct drm_i915_private *dev_priv = dev->dev_private;
  72         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
  73         enum intel_display_power_domain power_domain;
  74         u32 tmp;
  75         bool ret;
  76
  77         power_domain = intel_display_port_power_domain(encoder);
  78         if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
  79                 return false;
  80
  81         ret = false;
  82
  83         tmp = I915_READ(lvds_encoder->reg);
  84
  85         if (!(tmp & LVDS_PORT_EN))
  86                 goto out;
  87
  88         if (HAS_PCH_CPT(dev))
  89                 *pipe = PORT_TO_PIPE_CPT(tmp);
  90         else
  91                 *pipe = PORT_TO_PIPE(tmp);
  92
  93         ret = true;
  94
  95 out:
  96         intel_display_power_put(dev_priv, power_domain);
  97
  98         return ret;
  99 }
 100
 101 static void intel_lvds_get_config(struct intel_encoder *encoder,
 102                                   struct intel_crtc_state *pipe_config)
 103 {
 104         struct drm_device *dev = encoder->base.dev;
 105         struct drm_i915_private *dev_priv = dev->dev_private;
 106         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 107         u32 tmp, flags = 0;
 108         int dotclock;
 109
 110         tmp = I915_READ(lvds_encoder->reg);
 111         if (tmp & LVDS_HSYNC_POLARITY)
 112                 flags |= DRM_MODE_FLAG_NHSYNC;
 113         else
 114                 flags |= DRM_MODE_FLAG_PHSYNC;
 115         if (tmp & LVDS_VSYNC_POLARITY)
 116                 flags |= DRM_MODE_FLAG_NVSYNC;
 117         else
 118                 flags |= DRM_MODE_FLAG_PVSYNC;
 119
 120         pipe_config->base.adjusted_mode.flags |= flags;
 121
 122         /* gen2/3 store dither state in pfit control, needs to match */
 123         if (INTEL_INFO(dev)->gen < 4) {
 124                 tmp = I915_READ(PFIT_CONTROL);
 125
 126                 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
 127         }
 128
 129         dotclock = pipe_config->port_clock;
 130
 131         if (HAS_PCH_SPLIT(dev_priv->dev))
 132                 ironlake_check_encoder_dotclock(pipe_config, dotclock);
 133
 134         pipe_config->base.adjusted_mode.crtc_clock = dotclock;
 135 }
 136
 137 static void intel_pre_enable_lvds(struct intel_encoder *encoder)
 138 {
 139         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 140         struct drm_device *dev = encoder->base.dev;
 141         struct drm_i915_private *dev_priv = dev->dev_private;
 142         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
 143         const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
 144         int pipe = crtc->pipe;
 145         u32 temp;
 146
 147         if (HAS_PCH_SPLIT(dev)) {
 148                 assert_fdi_rx_pll_disabled(dev_priv, pipe);
 149                 assert_shared_dpll_disabled(dev_priv,
 150                                             intel_crtc_to_shared_dpll(crtc));
 151         } else {
 152                 assert_pll_disabled(dev_priv, pipe);
 153         }
 154
 155         temp = I915_READ(lvds_encoder->reg);
 156         temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
 157
 158         if (HAS_PCH_CPT(dev)) {
 159                 temp &= ~PORT_TRANS_SEL_MASK;
 160                 temp |= PORT_TRANS_SEL_CPT(pipe);
 161         } else {
 162                 if (pipe == 1) {
 163                         temp |= LVDS_PIPEB_SELECT;
 164                 } else {
 165                         temp &= ~LVDS_PIPEB_SELECT;
 166                 }
 167         }
 168
 169         /* set the corresponsding LVDS_BORDER bit */
 170         temp &= ~LVDS_BORDER_ENABLE;
 171         temp |= crtc->config->gmch_pfit.lvds_border_bits;
 172         /* Set the B0-B3 data pairs corresponding to whether we're going to
 173          * set the DPLLs for dual-channel mode or not.
 174          */
 175         if (lvds_encoder->is_dual_link)
 176                 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
 177         else
 178                 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
 179
 180         /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
 181          * appropriately here, but we need to look more thoroughly into how
 182          * panels behave in the two modes. For now, let's just maintain the
 183          * value we got from the BIOS.
 184          */
 185          temp &= ~LVDS_A3_POWER_MASK;
 186          temp |= lvds_encoder->a3_power;
 187
 188         /* Set the dithering flag on LVDS as needed, note that there is no
 189          * special lvds dither control bit on pch-split platforms, dithering is
 190          * only controlled through the PIPECONF reg. */
 191         if (INTEL_INFO(dev)->gen == 4) {
 192                 /* Bspec wording suggests that LVDS port dithering only exists
 193                  * for 18bpp panels. */
 194                 if (crtc->config->dither && crtc->config->pipe_bpp == 18)
 195                         temp |= LVDS_ENABLE_DITHER;
 196                 else
 197                         temp &= ~LVDS_ENABLE_DITHER;
 198         }
 199         temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
 200         if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
 201                 temp |= LVDS_HSYNC_POLARITY;
 202         if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
 203                 temp |= LVDS_VSYNC_POLARITY;
 204
 205         I915_WRITE(lvds_encoder->reg, temp);
 206 }
 207
 208 /**
 209  * Sets the power state for the panel.
 210  */
 211 static void intel_enable_lvds(struct intel_encoder *encoder)
 212 {
 213         struct drm_device *dev = encoder->base.dev;
 214         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 215         struct intel_connector *intel_connector =
 216                 &lvds_encoder->attached_connector->base;
 217         struct drm_i915_private *dev_priv = dev->dev_private;
 218         i915_reg_t ctl_reg, stat_reg;
 219
 220         if (HAS_PCH_SPLIT(dev)) {
 221                 ctl_reg = PCH_PP_CONTROL;
 222                 stat_reg = PCH_PP_STATUS;
 223         } else {
 224                 ctl_reg = PP_CONTROL;
 225                 stat_reg = PP_STATUS;
 226         }
 227
 228         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
 229
 230         I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
 231         POSTING_READ(lvds_encoder->reg);
 232         if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
 233                 DRM_ERROR("timed out waiting for panel to power on\n");
 234
 235         intel_panel_enable_backlight(intel_connector);
 236 }
 237
 238 static void intel_disable_lvds(struct intel_encoder *encoder)
 239 {
 240         struct drm_device *dev = encoder->base.dev;
 241         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 242         struct drm_i915_private *dev_priv = dev->dev_private;
 243         i915_reg_t ctl_reg, stat_reg;
 244
 245         if (HAS_PCH_SPLIT(dev)) {
 246                 ctl_reg = PCH_PP_CONTROL;
 247                 stat_reg = PCH_PP_STATUS;
 248         } else {
 249                 ctl_reg = PP_CONTROL;
 250                 stat_reg = PP_STATUS;
 251         }
 252
 253         I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
 254         if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
 255                 DRM_ERROR("timed out waiting for panel to power off\n");
 256
 257         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
 258         POSTING_READ(lvds_encoder->reg);
 259 }
 260
 261 static void gmch_disable_lvds(struct intel_encoder *encoder)
 262 {
 263         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 264         struct intel_connector *intel_connector =
 265                 &lvds_encoder->attached_connector->base;
 266
 267         intel_panel_disable_backlight(intel_connector);
 268
 269         intel_disable_lvds(encoder);
 270 }
 271
 272 static void pch_disable_lvds(struct intel_encoder *encoder)
 273 {
 274         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 275         struct intel_connector *intel_connector =
 276                 &lvds_encoder->attached_connector->base;
 277
 278         intel_panel_disable_backlight(intel_connector);
 279 }
 280
 281 static void pch_post_disable_lvds(struct intel_encoder *encoder)
 282 {
 283         intel_disable_lvds(encoder);
 284 }
 285
 286 static enum drm_mode_status
 287 intel_lvds_mode_valid(struct drm_connector *connector,
 288                       struct drm_display_mode *mode)
 289 {
 290         struct intel_connector *intel_connector = to_intel_connector(connector);
 291         struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 292         int max_pixclk = to_i915(connector->dev)->max_dotclk_freq;
 293
 294         if (mode->hdisplay > fixed_mode->hdisplay)
 295                 return MODE_PANEL;
 296         if (mode->vdisplay > fixed_mode->vdisplay)
 297                 return MODE_PANEL;
 298         if (fixed_mode->clock > max_pixclk)
 299                 return MODE_CLOCK_HIGH;
 300
 301         return MODE_OK;
 302 }
 303
 304 static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
 305                                       struct intel_crtc_state *pipe_config)
 306 {
 307         struct drm_device *dev = intel_encoder->base.dev;
 308         struct intel_lvds_encoder *lvds_encoder =
 309                 to_lvds_encoder(&intel_encoder->base);
 310         struct intel_connector *intel_connector =
 311                 &lvds_encoder->attached_connector->base;
 312         struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
 313         struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
 314         unsigned int lvds_bpp;
 315
 316         /* Should never happen!! */
 317         if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
 318                 DRM_ERROR("Can't support LVDS on pipe A\n");
 319                 return false;
 320         }
 321
 322         if (lvds_encoder->a3_power == LVDS_A3_POWER_UP)
 323                 lvds_bpp = 8*3;
 324         else
 325                 lvds_bpp = 6*3;
 326
 327         if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
 328                 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
 329                               pipe_config->pipe_bpp, lvds_bpp);
 330                 pipe_config->pipe_bpp = lvds_bpp;
 331         }
 332
 333         /*
 334          * We have timings from the BIOS for the panel, put them in
 335          * to the adjusted mode.  The CRTC will be set up for this mode,
 336          * with the panel scaling set up to source from the H/VDisplay
 337          * of the original mode.
 338          */
 339         intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
 340                                adjusted_mode);
 341
 342         if (HAS_PCH_SPLIT(dev)) {
 343                 pipe_config->has_pch_encoder = true;
 344
 345                 intel_pch_panel_fitting(intel_crtc, pipe_config,
 346                                         intel_connector->panel.fitting_mode);
 347         } else {
 348                 intel_gmch_panel_fitting(intel_crtc, pipe_config,
 349                                          intel_connector->panel.fitting_mode);
 350
 351         }
 352
 353         /*
 354          * XXX: It would be nice to support lower refresh rates on the
 355          * panels to reduce power consumption, and perhaps match the
 356          * user's requested refresh rate.
 357          */
 358
 359         return true;
 360 }
 361
 362 /**
 363  * Detect the LVDS connection.
 364  *
 365  * Since LVDS doesn't have hotlug, we use the lid as a proxy.  Open means
 366  * connected and closed means disconnected.  We also send hotplug events as
 367  * needed, using lid status notification from the input layer.
 368  */
 369 static enum drm_connector_status
 370 intel_lvds_detect(struct drm_connector *connector, bool force)
 371 {
 372         struct drm_device *dev = connector->dev;
 373         enum drm_connector_status status;
 374
 375         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
 376                       connector->base.id, connector->name);
 377
 378         status = intel_panel_detect(dev);
 379         if (status != connector_status_unknown)
 380                 return status;
 381
 382         return connector_status_connected;
 383 }
 384
 385 /**
 386  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 387  */
 388 static int intel_lvds_get_modes(struct drm_connector *connector)
 389 {
 390         struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
 391         struct drm_device *dev = connector->dev;
 392         struct drm_display_mode *mode;
 393
 394         /* use cached edid if we have one */
 395         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 396                 return drm_add_edid_modes(connector, lvds_connector->base.edid);
 397
 398         mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
 399         if (mode == NULL)
 400                 return 0;
 401
 402         drm_mode_probed_add(connector, mode);
 403         return 1;
 404 }
 405
 406 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
 407 {
 408         DRM_INFO("Skipping forced modeset for %s\n", id->ident);
 409         return 1;
 410 }
 411
 412 /* The GPU hangs up on these systems if modeset is performed on LID open */
 413 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
 414         {
 415                 .callback = intel_no_modeset_on_lid_dmi_callback,
 416                 .ident = "Toshiba Tecra A11",
 417                 .matches = {
 418                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 419                         DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
 420                 },
 421         },
 422
 423         { }     /* terminating entry */
 424 };
 425
 426 #if 0
 427 /*
 428  * Lid events. Note the use of 'modeset':
 429  *  - we set it to MODESET_ON_LID_OPEN on lid close,
 430  *    and set it to MODESET_DONE on open
 431  *  - we use it as a "only once" bit (ie we ignore
 432  *    duplicate events where it was already properly set)
 433  *  - the suspend/resume paths will set it to
 434  *    MODESET_SUSPENDED and ignore the lid open event,
 435  *    because they restore the mode ("lid open").
 436  */
 437 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
 438                             void *unused)
 439 {
 440         struct intel_lvds_connector *lvds_connector =
 441                 container_of(nb, struct intel_lvds_connector, lid_notifier);
 442         struct drm_connector *connector = &lvds_connector->base.base;
 443         struct drm_device *dev = connector->dev;
 444         struct drm_i915_private *dev_priv = dev->dev_private;
 445
 446         if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
 447                 return NOTIFY_OK;
 448
 449         mutex_lock(&dev_priv->modeset_restore_lock);
 450         if (dev_priv->modeset_restore == MODESET_SUSPENDED)
 451                 goto exit;
 452         /*
 453          * check and update the status of LVDS connector after receiving
 454          * the LID nofication event.
 455          */
 456         connector->status = connector->funcs->detect(connector, false);
 457
 458         /* Don't force modeset on machines where it causes a GPU lockup */
 459         if (dmi_check_system(intel_no_modeset_on_lid))
 460                 goto exit;
 461         if (!acpi_lid_open()) {
 462                 /* do modeset on next lid open event */
 463                 dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
 464                 goto exit;
 465         }
 466
 467         if (dev_priv->modeset_restore == MODESET_DONE)
 468                 goto exit;
 469
 470         /*
 471          * Some old platform's BIOS love to wreak havoc while the lid is closed.
 472          * We try to detect this here and undo any damage. The split for PCH
 473          * platforms is rather conservative and a bit arbitrary expect that on
 474          * those platforms VGA disabling requires actual legacy VGA I/O access,
 475          * and as part of the cleanup in the hw state restore we also redisable
 476          * the vga plane.
 477          */
 478         if (!HAS_PCH_SPLIT(dev)) {
 479                 drm_modeset_lock_all(dev);
 480                 intel_display_resume(dev);
 481                 drm_modeset_unlock_all(dev);
 482         }
 483
 484         dev_priv->modeset_restore = MODESET_DONE;
 485
 486 exit:
 487         mutex_unlock(&dev_priv->modeset_restore_lock);
 488         return NOTIFY_OK;
 489 }
 490 #endif
 491
 492 /**
 493  * intel_lvds_destroy - unregister and free LVDS structures
 494  * @connector: connector to free
 495  *
 496  * Unregister the DDC bus for this connector then free the driver private
 497  * structure.
 498  */
 499 static void intel_lvds_destroy(struct drm_connector *connector)
 500 {
 501         struct intel_lvds_connector *lvds_connector =
 502                 to_lvds_connector(connector);
 503
 504 #if 0
 505         if (lvds_connector->lid_notifier.notifier_call)
 506                 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
 507 #endif
 508
 509         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 510                 kfree(lvds_connector->base.edid);
 511
 512         intel_panel_fini(&lvds_connector->base.panel);
 513
 514         drm_connector_cleanup(connector);
 515         kfree(connector);
 516 }
 517
 518 static int intel_lvds_set_property(struct drm_connector *connector,
 519                                    struct drm_property *property,
 520                                    uint64_t value)
 521 {
 522         struct intel_connector *intel_connector = to_intel_connector(connector);
 523         struct drm_device *dev = connector->dev;
 524
 525         if (property == dev->mode_config.scaling_mode_property) {
 526                 struct drm_crtc *crtc;
 527
 528                 if (value == DRM_MODE_SCALE_NONE) {
 529                         DRM_DEBUG_KMS("no scaling not supported\n");
 530                         return -EINVAL;
 531                 }
 532
 533                 if (intel_connector->panel.fitting_mode == value) {
 534                         /* the LVDS scaling property is not changed */
 535                         return 0;
 536                 }
 537                 intel_connector->panel.fitting_mode = value;
 538
 539                 crtc = intel_attached_encoder(connector)->base.crtc;
 540                 if (crtc && crtc->state->enable) {
 541                         /*
 542                          * If the CRTC is enabled, the display will be changed
 543                          * according to the new panel fitting mode.
 544                          */
 545                         intel_crtc_restore_mode(crtc);
 546                 }
 547         }
 548
 549         return 0;
 550 }
 551
 552 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
 553         .get_modes = intel_lvds_get_modes,
 554         .mode_valid = intel_lvds_mode_valid,
 555         .best_encoder = intel_best_encoder,
 556 };
 557
 558 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
 559         .dpms = drm_atomic_helper_connector_dpms,
 560         .detect = intel_lvds_detect,
 561         .fill_modes = drm_helper_probe_single_connector_modes,
 562         .set_property = intel_lvds_set_property,
 563         .atomic_get_property = intel_connector_atomic_get_property,
 564         .destroy = intel_lvds_destroy,
 565         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 566         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 567 };
 568
 569 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
 570         .destroy = intel_encoder_destroy,
 571 };
 572
 573 static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
 574 {
 575         DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
 576         return 1;
 577 }
 578
 579 /* These systems claim to have LVDS, but really don't */
 580 static const struct dmi_system_id intel_no_lvds[] = {
 581         {
 582                 .callback = intel_no_lvds_dmi_callback,
 583                 .ident = "Apple Mac Mini (Core series)",
 584                 .matches = {
 585                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 586                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
 587                 },
 588         },
 589         {
 590                 .callback = intel_no_lvds_dmi_callback,
 591                 .ident = "Apple Mac Mini (Core 2 series)",
 592                 .matches = {
 593                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 594                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
 595                 },
 596         },
 597         {
 598                 .callback = intel_no_lvds_dmi_callback,
 599                 .ident = "MSI IM-945GSE-A",
 600                 .matches = {
 601                         DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
 602                         DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
 603                 },
 604         },
 605         {
 606                 .callback = intel_no_lvds_dmi_callback,
 607                 .ident = "Dell Studio Hybrid",
 608                 .matches = {
 609                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 610                         DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
 611                 },
 612         },
 613         {
 614                 .callback = intel_no_lvds_dmi_callback,
 615                 .ident = "Dell OptiPlex FX170",
 616                 .matches = {
 617                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 618                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
 619                 },
 620         },
 621         {
 622                 .callback = intel_no_lvds_dmi_callback,
 623                 .ident = "AOpen Mini PC",
 624                 .matches = {
 625                         DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
 626                         DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
 627                 },
 628         },
 629         {
 630                 .callback = intel_no_lvds_dmi_callback,
 631                 .ident = "AOpen Mini PC MP915",
 632                 .matches = {
 633                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 634                         DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
 635                 },
 636         },
 637         {
 638                 .callback = intel_no_lvds_dmi_callback,
 639                 .ident = "AOpen i915GMm-HFS",
 640                 .matches = {
 641                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 642                         DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
 643                 },
 644         },
 645         {
 646                 .callback = intel_no_lvds_dmi_callback,
 647                 .ident = "AOpen i45GMx-I",
 648                 .matches = {
 649                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 650                         DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
 651                 },
 652         },
 653         {
 654                 .callback = intel_no_lvds_dmi_callback,
 655                 .ident = "Aopen i945GTt-VFA",
 656                 .matches = {
 657                         DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
 658                 },
 659         },
 660         {
 661                 .callback = intel_no_lvds_dmi_callback,
 662                 .ident = "Clientron U800",
 663                 .matches = {
 664                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 665                         DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
 666                 },
 667         },
 668         {
 669                 .callback = intel_no_lvds_dmi_callback,
 670                 .ident = "Clientron E830",
 671                 .matches = {
 672                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 673                         DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
 674                 },
 675         },
 676         {
 677                 .callback = intel_no_lvds_dmi_callback,
 678                 .ident = "Asus EeeBox PC EB1007",
 679                 .matches = {
 680                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 681                         DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
 682                 },
 683         },
 684         {
 685                 .callback = intel_no_lvds_dmi_callback,
 686                 .ident = "Asus AT5NM10T-I",
 687                 .matches = {
 688                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 689                         DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
 690                 },
 691         },
 692         {
 693                 .callback = intel_no_lvds_dmi_callback,
 694                 .ident = "Hewlett-Packard HP t5740",
 695                 .matches = {
 696                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 697                         DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
 698                 },
 699         },
 700         {
 701                 .callback = intel_no_lvds_dmi_callback,
 702                 .ident = "Hewlett-Packard t5745",
 703                 .matches = {
 704                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 705                         DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
 706                 },
 707         },
 708         {
 709                 .callback = intel_no_lvds_dmi_callback,
 710                 .ident = "Hewlett-Packard st5747",
 711                 .matches = {
 712                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 713                         DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
 714                 },
 715         },
 716         {
 717                 .callback = intel_no_lvds_dmi_callback,
 718                 .ident = "MSI Wind Box DC500",
 719                 .matches = {
 720                         DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
 721                         DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
 722                 },
 723         },
 724         {
 725                 .callback = intel_no_lvds_dmi_callback,
 726                 .ident = "Gigabyte GA-D525TUD",
 727                 .matches = {
 728                         DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
 729                         DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
 730                 },
 731         },
 732         {
 733                 .callback = intel_no_lvds_dmi_callback,
 734                 .ident = "Supermicro X7SPA-H",
 735                 .matches = {
 736                         DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
 737                         DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
 738                 },
 739         },
 740         {
 741                 .callback = intel_no_lvds_dmi_callback,
 742                 .ident = "Fujitsu Esprimo Q900",
 743                 .matches = {
 744                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 745                         DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
 746                 },
 747         },
 748         {
 749                 .callback = intel_no_lvds_dmi_callback,
 750                 .ident = "Intel D410PT",
 751                 .matches = {
 752                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 753                         DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
 754                 },
 755         },
 756         {
 757                 .callback = intel_no_lvds_dmi_callback,
 758                 .ident = "Intel D425KT",
 759                 .matches = {
 760                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 761                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
 762                 },
 763         },
 764         {
 765                 .callback = intel_no_lvds_dmi_callback,
 766                 .ident = "Intel D510MO",
 767                 .matches = {
 768                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 769                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
 770                 },
 771         },
 772         {
 773                 .callback = intel_no_lvds_dmi_callback,
 774                 .ident = "Intel D525MW",
 775                 .matches = {
 776                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 777                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
 778                 },
 779         },
 780
 781         { }     /* terminating entry */
 782 };
 783
 784 /*
 785  * Enumerate the child dev array parsed from VBT to check whether
 786  * the LVDS is present.
 787  * If it is present, return 1.
 788  * If it is not present, return false.
 789  * If no child dev is parsed from VBT, it assumes that the LVDS is present.
 790  */
 791 static bool lvds_is_present_in_vbt(struct drm_device *dev,
 792                                    u8 *i2c_pin)
 793 {
 794         struct drm_i915_private *dev_priv = dev->dev_private;
 795         int i;
 796
 797         if (!dev_priv->vbt.child_dev_num)
 798                 return true;
 799
 800         for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
 801                 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
 802                 struct old_child_dev_config *child = &uchild->old;
 803
 804                 /* If the device type is not LFP, continue.
 805                  * We have to check both the new identifiers as well as the
 806                  * old for compatibility with some BIOSes.
 807                  */
 808                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
 809                     child->device_type != DEVICE_TYPE_LFP)
 810                         continue;
 811
 812                 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
 813                         *i2c_pin = child->i2c_pin;
 814
 815                 /* However, we cannot trust the BIOS writers to populate
 816                  * the VBT correctly.  Since LVDS requires additional
 817                  * information from AIM blocks, a non-zero addin offset is
 818                  * a good indicator that the LVDS is actually present.
 819                  */
 820                 if (child->addin_offset)
 821                         return true;
 822
 823                 /* But even then some BIOS writers perform some black magic
 824                  * and instantiate the device without reference to any
 825                  * additional data.  Trust that if the VBT was written into
 826                  * the OpRegion then they have validated the LVDS's existence.
 827                  */
 828                 if (dev_priv->opregion.vbt)
 829                         return true;
 830         }
 831
 832         return false;
 833 }
 834
 835 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
 836 {
 837         DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
 838         return 1;
 839 }
 840
 841 static const struct dmi_system_id intel_dual_link_lvds[] = {
 842         {
 843                 .callback = intel_dual_link_lvds_callback,
 844                 .ident = "Apple MacBook Pro 15\" (2010)",
 845                 .matches = {
 846                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 847                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
 848                 },
 849         },
 850         {
 851                 .callback = intel_dual_link_lvds_callback,
 852                 .ident = "Apple MacBook Pro 15\" (2011)",
 853                 .matches = {
 854                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 855                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
 856                 },
 857         },
 858         {
 859                 .callback = intel_dual_link_lvds_callback,
 860                 .ident = "Apple MacBook Pro 15\" (2012)",
 861                 .matches = {
 862                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 863                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
 864                 },
 865         },
 866         { }     /* terminating entry */
 867 };
 868
 869 bool intel_is_dual_link_lvds(struct drm_device *dev)
 870 {
 871         struct intel_encoder *encoder;
 872         struct intel_lvds_encoder *lvds_encoder;
 873
 874         for_each_intel_encoder(dev, encoder) {
 875                 if (encoder->type == INTEL_OUTPUT_LVDS) {
 876                         lvds_encoder = to_lvds_encoder(&encoder->base);
 877
 878                         return lvds_encoder->is_dual_link;
 879                 }
 880         }
 881
 882         return false;
 883 }
 884
 885 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
 886 {
 887         struct drm_device *dev = lvds_encoder->base.base.dev;
 888         unsigned int val;
 889         struct drm_i915_private *dev_priv = dev->dev_private;
 890
 891         /* use the module option value if specified */
 892         if (i915.lvds_channel_mode > 0)
 893                 return i915.lvds_channel_mode == 2;
 894
 895         /* single channel LVDS is limited to 112 MHz */
 896         if (lvds_encoder->attached_connector->base.panel.fixed_mode->clock
 897             > 112999)
 898                 return true;
 899
 900         if (dmi_check_system(intel_dual_link_lvds))
 901                 return true;
 902
 903         /* BIOS should set the proper LVDS register value at boot, but
 904          * in reality, it doesn't set the value when the lid is closed;
 905          * we need to check "the value to be set" in VBT when LVDS
 906          * register is uninitialized.
 907          */
 908         val = I915_READ(lvds_encoder->reg);
 909         if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
 910                 val = dev_priv->vbt.bios_lvds_val;
 911
 912         return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
 913 }
 914
 915 static bool intel_lvds_supported(struct drm_device *dev)
 916 {
 917         /* With the introduction of the PCH we gained a dedicated
 918          * LVDS presence pin, use it. */
 919         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
 920                 return true;
 921
 922         /* Otherwise LVDS was only attached to mobile products,
 923          * except for the inglorious 830gm */
 924         if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 925                 return true;
 926
 927         return false;
 928 }
 929
 930 /**
 931  * intel_lvds_init - setup LVDS connectors on this device
 932  * @dev: drm device
 933  *
 934  * Create the connector, register the LVDS DDC bus, and try to figure out what
 935  * modes we can display on the LVDS panel (if present).
 936  */
 937 void intel_lvds_init(struct drm_device *dev)
 938 {
 939         struct drm_i915_private *dev_priv = dev->dev_private;
 940         struct intel_lvds_encoder *lvds_encoder;
 941         struct intel_encoder *intel_encoder;
 942         struct intel_lvds_connector *lvds_connector;
 943         struct intel_connector *intel_connector;
 944         struct drm_connector *connector;
 945         struct drm_encoder *encoder;
 946         struct drm_display_mode *scan; /* *modes, *bios_mode; */
 947         struct drm_display_mode *fixed_mode = NULL;
 948         struct drm_display_mode *downclock_mode = NULL;
 949         struct edid *edid;
 950         struct drm_crtc *crtc;
 951         i915_reg_t lvds_reg;
 952         u32 lvds;
 953         int pipe;
 954         u8 pin;
 955
 956         /*
 957          * Unlock registers and just leave them unlocked. Do this before
 958          * checking quirk lists to avoid bogus WARNINGs.
 959          */
 960         if (HAS_PCH_SPLIT(dev)) {
 961                 I915_WRITE(PCH_PP_CONTROL,
 962                            I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
 963         } else if (INTEL_INFO(dev_priv)->gen < 5) {
 964                 I915_WRITE(PP_CONTROL,
 965                            I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
 966         }
 967         if (!intel_lvds_supported(dev))
 968                 return;
 969
 970         /* Skip init on machines we know falsely report LVDS */
 971         if (dmi_check_system(intel_no_lvds))
 972                 return;
 973
 974         if (HAS_PCH_SPLIT(dev))
 975                 lvds_reg = PCH_LVDS;
 976         else
 977                 lvds_reg = LVDS;
 978
 979         lvds = I915_READ(lvds_reg);
 980
 981         if (HAS_PCH_SPLIT(dev)) {
 982                 if ((lvds & LVDS_DETECTED) == 0)
 983                         return;
 984                 if (dev_priv->vbt.edp_support) {
 985                         DRM_DEBUG_KMS("disable LVDS for eDP support\n");
 986                         return;
 987                 }
 988         }
 989
 990         pin = GMBUS_PIN_PANEL;
 991         if (!lvds_is_present_in_vbt(dev, &pin)) {
 992                 if ((lvds & LVDS_PORT_EN) == 0) {
 993                         DRM_DEBUG_KMS("LVDS is not present in VBT\n");
 994                         return;
 995                 }
 996                 DRM_DEBUG_KMS("LVDS is not present in VBT, but enabled anyway\n");
 997         }
 998
 999          /* Set the Panel Power On/Off timings if uninitialized. */
1000         if (INTEL_INFO(dev_priv)->gen < 5 &&
1001             I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
1002                 /* Set T2 to 40ms and T5 to 200ms */
1003                 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
1004
1005                 /* Set T3 to 35ms and Tx to 200ms */
1006                 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
1007
1008                 DRM_DEBUG_KMS("Panel power timings uninitialized, setting defaults\n");
1009         }
1010
1011         lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
1012         if (!lvds_encoder)
1013                 return;
1014
1015         lvds_connector = kzalloc(sizeof(*lvds_connector), GFP_KERNEL);
1016         if (!lvds_connector) {
1017                 kfree(lvds_encoder);
1018                 return;
1019         }
1020
1021         if (intel_connector_init(&lvds_connector->base) < 0) {
1022                 kfree(lvds_connector);
1023                 kfree(lvds_encoder);
1024                 return;
1025         }
1026
1027         lvds_encoder->attached_connector = lvds_connector;
1028
1029         intel_encoder = &lvds_encoder->base;
1030         encoder = &intel_encoder->base;
1031         intel_connector = &lvds_connector->base;
1032         connector = &intel_connector->base;
1033         drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
1034                            DRM_MODE_CONNECTOR_LVDS);
1035
1036         drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
1037                          DRM_MODE_ENCODER_LVDS, NULL);
1038
1039         intel_encoder->enable = intel_enable_lvds;
1040         intel_encoder->pre_enable = intel_pre_enable_lvds;
1041         intel_encoder->compute_config = intel_lvds_compute_config;
1042         if (HAS_PCH_SPLIT(dev_priv)) {
1043                 intel_encoder->disable = pch_disable_lvds;
1044                 intel_encoder->post_disable = pch_post_disable_lvds;
1045         } else {
1046                 intel_encoder->disable = gmch_disable_lvds;
1047         }
1048         intel_encoder->get_hw_state = intel_lvds_get_hw_state;
1049         intel_encoder->get_config = intel_lvds_get_config;
1050         intel_connector->get_hw_state = intel_connector_get_hw_state;
1051         intel_connector->unregister = intel_connector_unregister;
1052
1053         intel_connector_attach_encoder(intel_connector, intel_encoder);
1054         intel_encoder->type = INTEL_OUTPUT_LVDS;
1055
1056         intel_encoder->cloneable = 0;
1057         if (HAS_PCH_SPLIT(dev))
1058                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
1059         else if (IS_GEN4(dev))
1060                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
1061         else
1062                 intel_encoder->crtc_mask = (1 << 1);
1063
1064         drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
1065         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
1066         connector->interlace_allowed = false;
1067         connector->doublescan_allowed = false;
1068
1069         lvds_encoder->reg = lvds_reg;
1070
1071         /* create the scaling mode property */
1072         drm_mode_create_scaling_mode_property(dev);
1073         drm_object_attach_property(&connector->base,
1074                                       dev->mode_config.scaling_mode_property,
1075                                       DRM_MODE_SCALE_ASPECT);
1076         intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
1077         /*
1078          * LVDS discovery:
1079          * 1) check for EDID on DDC
1080          * 2) check for VBT data
1081          * 3) check to see if LVDS is already on
1082          *    if none of the above, no panel
1083          * 4) make sure lid is open
1084          *    if closed, act like it's not there for now
1085          */
1086
1087         /*
1088          * Attempt to get the fixed panel mode from DDC.  Assume that the
1089          * preferred mode is the right one.
1090          */
1091         mutex_lock(&dev->mode_config.mutex);
1092         edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1093         if (edid) {
1094                 if (drm_add_edid_modes(connector, edid)) {
1095                         drm_mode_connector_update_edid_property(connector,
1096                                                                 edid);
1097                 } else {
1098                         kfree(edid);
1099                         edid = ERR_PTR(-EINVAL);
1100                 }
1101         } else {
1102                 edid = ERR_PTR(-ENOENT);
1103         }
1104         lvds_connector->base.edid = edid;
1105
1106         if (IS_ERR_OR_NULL(edid)) {
1107                 /* Didn't get an EDID, so
1108                  * Set wide sync ranges so we get all modes
1109                  * handed to valid_mode for checking
1110                  */
1111                 connector->display_info.min_vfreq = 0;
1112                 connector->display_info.max_vfreq = 200;
1113                 connector->display_info.min_hfreq = 0;
1114                 connector->display_info.max_hfreq = 200;
1115         }
1116
1117         list_for_each_entry(scan, &connector->probed_modes, head) {
1118                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1119                         DRM_DEBUG_KMS("using preferred mode from EDID: ");
1120                         drm_mode_debug_printmodeline(scan);
1121
1122                         fixed_mode = drm_mode_duplicate(dev, scan);
1123                         if (fixed_mode)
1124                                 goto out;
1125                 }
1126         }
1127
1128         /* Failed to get EDID, what about VBT? */
1129         if (dev_priv->vbt.lfp_lvds_vbt_mode) {
1130                 DRM_DEBUG_KMS("using mode from VBT: ");
1131                 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
1132
1133                 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
1134                 if (fixed_mode) {
1135                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1136                         goto out;
1137                 }
1138         }
1139
1140         /*
1141          * If we didn't get EDID, try checking if the panel is already turned
1142          * on.  If so, assume that whatever is currently programmed is the
1143          * correct mode.
1144          */
1145
1146         /* Ironlake: FIXME if still fail, not try pipe mode now */
1147         if (HAS_PCH_SPLIT(dev))
1148                 goto failed;
1149
1150         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1151         crtc = intel_get_crtc_for_pipe(dev, pipe);
1152
1153         if (crtc && (lvds & LVDS_PORT_EN)) {
1154                 fixed_mode = intel_crtc_mode_get(dev, crtc);
1155                 if (fixed_mode) {
1156                         DRM_DEBUG_KMS("using current (BIOS) mode: ");
1157                         drm_mode_debug_printmodeline(fixed_mode);
1158                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1159                         goto out;
1160                 }
1161         }
1162
1163         /* If we still don't have a mode after all that, give up. */
1164         if (!fixed_mode)
1165                 goto failed;
1166
1167 out:
1168         mutex_unlock(&dev->mode_config.mutex);
1169
1170         intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
1171
1172         lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1173         DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1174                       lvds_encoder->is_dual_link ? "dual" : "single");
1175
1176         lvds_encoder->a3_power = lvds & LVDS_A3_POWER_MASK;
1177
1178 #if 0
1179         lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1180         if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1181                 DRM_DEBUG_KMS("lid notifier registration failed\n");
1182                 lvds_connector->lid_notifier.notifier_call = NULL;
1183         }
1184         drm_connector_register(connector);
1185 #endif
1186
1187         intel_panel_setup_backlight(connector, INVALID_PIPE);
1188
1189         return;
1190
1191 failed:
1192         mutex_unlock(&dev->mode_config.mutex);
1193
1194         DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1195         drm_connector_cleanup(connector);
1196         drm_encoder_cleanup(encoder);
1197         kfree(lvds_encoder);
1198         kfree(lvds_connector);
1199         return;
1200 }