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_crtc.h>
  34 #include <drm/drm_edid.h>
  35 #include "intel_drv.h"
  36 #include <drm/i915_drm.h>
  37 #include "i915_drv.h"
  38
  39 /* Private structure for the integrated LVDS support */
  40 struct intel_lvds_connector {
  41         struct intel_connector base;
  42
  43 #if 0
  44         struct notifier_block lid_notifier;
  45 #endif
  46 };
  47
  48 struct intel_lvds_encoder {
  49         struct intel_encoder base;
  50
  51         bool is_dual_link;
  52         u32 reg;
  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         u32 tmp;
  74
  75         tmp = I915_READ(lvds_encoder->reg);
  76
  77         if (!(tmp & LVDS_PORT_EN))
  78                 return false;
  79
  80         if (HAS_PCH_CPT(dev))
  81                 *pipe = PORT_TO_PIPE_CPT(tmp);
  82         else
  83                 *pipe = PORT_TO_PIPE(tmp);
  84
  85         return true;
  86 }
  87
  88 static void intel_lvds_get_config(struct intel_encoder *encoder,
  89                                   struct intel_crtc_config *pipe_config)
  90 {
  91         struct drm_device *dev = encoder->base.dev;
  92         struct drm_i915_private *dev_priv = dev->dev_private;
  93         u32 lvds_reg, tmp, flags = 0;
  94
  95         if (HAS_PCH_SPLIT(dev))
  96                 lvds_reg = PCH_LVDS;
  97         else
  98                 lvds_reg = LVDS;
  99
 100         tmp = I915_READ(lvds_reg);
 101         if (tmp & LVDS_HSYNC_POLARITY)
 102                 flags |= DRM_MODE_FLAG_NHSYNC;
 103         else
 104                 flags |= DRM_MODE_FLAG_PHSYNC;
 105         if (tmp & LVDS_VSYNC_POLARITY)
 106                 flags |= DRM_MODE_FLAG_NVSYNC;
 107         else
 108                 flags |= DRM_MODE_FLAG_PVSYNC;
 109
 110         pipe_config->adjusted_mode.flags |= flags;
 111
 112         /* gen2/3 store dither state in pfit control, needs to match */
 113         if (INTEL_INFO(dev)->gen < 4) {
 114                 tmp = I915_READ(PFIT_CONTROL);
 115
 116                 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
 117         }
 118 }
 119
 120 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
 121  * This is an exception to the general rule that mode_set doesn't turn
 122  * things on.
 123  */
 124 static void intel_pre_pll_enable_lvds(struct intel_encoder *encoder)
 125 {
 126         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 127         struct drm_device *dev = encoder->base.dev;
 128         struct drm_i915_private *dev_priv = dev->dev_private;
 129         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 130         struct drm_display_mode *fixed_mode =
 131                 lvds_encoder->attached_connector->base.panel.fixed_mode;
 132         int pipe = intel_crtc->pipe;
 133         u32 temp;
 134
 135         temp = I915_READ(lvds_encoder->reg);
 136         temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
 137
 138         if (HAS_PCH_CPT(dev)) {
 139                 temp &= ~PORT_TRANS_SEL_MASK;
 140                 temp |= PORT_TRANS_SEL_CPT(pipe);
 141         } else {
 142                 if (pipe == 1) {
 143                         temp |= LVDS_PIPEB_SELECT;
 144                 } else {
 145                         temp &= ~LVDS_PIPEB_SELECT;
 146                 }
 147         }
 148
 149         /* set the corresponsding LVDS_BORDER bit */
 150         temp &= ~LVDS_BORDER_ENABLE;
 151         temp |= intel_crtc->config.gmch_pfit.lvds_border_bits;
 152         /* Set the B0-B3 data pairs corresponding to whether we're going to
 153          * set the DPLLs for dual-channel mode or not.
 154          */
 155         if (lvds_encoder->is_dual_link)
 156                 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
 157         else
 158                 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
 159
 160         /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
 161          * appropriately here, but we need to look more thoroughly into how
 162          * panels behave in the two modes.
 163          */
 164
 165         /* Set the dithering flag on LVDS as needed, note that there is no
 166          * special lvds dither control bit on pch-split platforms, dithering is
 167          * only controlled through the PIPECONF reg. */
 168         if (INTEL_INFO(dev)->gen == 4) {
 169                 /* Bspec wording suggests that LVDS port dithering only exists
 170                  * for 18bpp panels. */
 171                 if (intel_crtc->config.dither &&
 172                     intel_crtc->config.pipe_bpp == 18)
 173                         temp |= LVDS_ENABLE_DITHER;
 174                 else
 175                         temp &= ~LVDS_ENABLE_DITHER;
 176         }
 177         temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
 178         if (fixed_mode->flags & DRM_MODE_FLAG_NHSYNC)
 179                 temp |= LVDS_HSYNC_POLARITY;
 180         if (fixed_mode->flags & DRM_MODE_FLAG_NVSYNC)
 181                 temp |= LVDS_VSYNC_POLARITY;
 182
 183         I915_WRITE(lvds_encoder->reg, temp);
 184 }
 185
 186 /**
 187  * Sets the power state for the panel.
 188  */
 189 static void intel_enable_lvds(struct intel_encoder *encoder)
 190 {
 191         struct drm_device *dev = encoder->base.dev;
 192         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 193         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 194         struct drm_i915_private *dev_priv = dev->dev_private;
 195         u32 ctl_reg, stat_reg;
 196
 197         if (HAS_PCH_SPLIT(dev)) {
 198                 ctl_reg = PCH_PP_CONTROL;
 199                 stat_reg = PCH_PP_STATUS;
 200         } else {
 201                 ctl_reg = PP_CONTROL;
 202                 stat_reg = PP_STATUS;
 203         }
 204
 205         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
 206
 207         I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
 208         POSTING_READ(lvds_encoder->reg);
 209         if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
 210                 DRM_ERROR("timed out waiting for panel to power on\n");
 211
 212         intel_panel_enable_backlight(dev, intel_crtc->pipe);
 213 }
 214
 215 static void intel_disable_lvds(struct intel_encoder *encoder)
 216 {
 217         struct drm_device *dev = encoder->base.dev;
 218         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 219         struct drm_i915_private *dev_priv = dev->dev_private;
 220         u32 ctl_reg, stat_reg;
 221
 222         if (HAS_PCH_SPLIT(dev)) {
 223                 ctl_reg = PCH_PP_CONTROL;
 224                 stat_reg = PCH_PP_STATUS;
 225         } else {
 226                 ctl_reg = PP_CONTROL;
 227                 stat_reg = PP_STATUS;
 228         }
 229
 230         intel_panel_disable_backlight(dev);
 231
 232         I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
 233         if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
 234                 DRM_ERROR("timed out waiting for panel to power off\n");
 235
 236         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
 237         POSTING_READ(lvds_encoder->reg);
 238 }
 239
 240 static int intel_lvds_mode_valid(struct drm_connector *connector,
 241                                  struct drm_display_mode *mode)
 242 {
 243         struct intel_connector *intel_connector = to_intel_connector(connector);
 244         struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 245
 246         if (mode->hdisplay > fixed_mode->hdisplay)
 247                 return MODE_PANEL;
 248         if (mode->vdisplay > fixed_mode->vdisplay)
 249                 return MODE_PANEL;
 250
 251         return MODE_OK;
 252 }
 253
 254 static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
 255                                       struct intel_crtc_config *pipe_config)
 256 {
 257         struct drm_device *dev = intel_encoder->base.dev;
 258         struct drm_i915_private *dev_priv = dev->dev_private;
 259         struct intel_lvds_encoder *lvds_encoder =
 260                 to_lvds_encoder(&intel_encoder->base);
 261         struct intel_connector *intel_connector =
 262                 &lvds_encoder->attached_connector->base;
 263         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
 264         struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
 265         unsigned int lvds_bpp;
 266
 267         /* Should never happen!! */
 268         if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
 269                 DRM_ERROR("Can't support LVDS on pipe A\n");
 270                 return false;
 271         }
 272
 273         if ((I915_READ(lvds_encoder->reg) & LVDS_A3_POWER_MASK) ==
 274             LVDS_A3_POWER_UP)
 275                 lvds_bpp = 8*3;
 276         else
 277                 lvds_bpp = 6*3;
 278
 279         if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
 280                 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
 281                               pipe_config->pipe_bpp, lvds_bpp);
 282                 pipe_config->pipe_bpp = lvds_bpp;
 283         }
 284
 285         /*
 286          * We have timings from the BIOS for the panel, put them in
 287          * to the adjusted mode.  The CRTC will be set up for this mode,
 288          * with the panel scaling set up to source from the H/VDisplay
 289          * of the original mode.
 290          */
 291         intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
 292                                adjusted_mode);
 293
 294         if (HAS_PCH_SPLIT(dev)) {
 295                 pipe_config->has_pch_encoder = true;
 296
 297                 intel_pch_panel_fitting(intel_crtc, pipe_config,
 298                                         intel_connector->panel.fitting_mode);
 299         } else {
 300                 intel_gmch_panel_fitting(intel_crtc, pipe_config,
 301                                          intel_connector->panel.fitting_mode);
 302
 303         }
 304
 305         /*
 306          * XXX: It would be nice to support lower refresh rates on the
 307          * panels to reduce power consumption, and perhaps match the
 308          * user's requested refresh rate.
 309          */
 310
 311         return true;
 312 }
 313
 314 static void intel_lvds_mode_set(struct drm_encoder *encoder,
 315                                 struct drm_display_mode *mode,
 316                                 struct drm_display_mode *adjusted_mode)
 317 {
 318         /*
 319          * The LVDS pin pair will already have been turned on in the
 320          * intel_crtc_mode_set since it has a large impact on the DPLL
 321          * settings.
 322          */
 323 }
 324
 325 /**
 326  * Detect the LVDS connection.
 327  *
 328  * Since LVDS doesn't have hotlug, we use the lid as a proxy.  Open means
 329  * connected and closed means disconnected.  We also send hotplug events as
 330  * needed, using lid status notification from the input layer.
 331  */
 332 static enum drm_connector_status
 333 intel_lvds_detect(struct drm_connector *connector, bool force)
 334 {
 335         struct drm_device *dev = connector->dev;
 336         enum drm_connector_status status;
 337
 338         status = intel_panel_detect(dev);
 339         if (status != connector_status_unknown)
 340                 return status;
 341
 342         return connector_status_connected;
 343 }
 344
 345 /**
 346  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 347  */
 348 static int intel_lvds_get_modes(struct drm_connector *connector)
 349 {
 350         struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
 351         struct drm_device *dev = connector->dev;
 352         struct drm_display_mode *mode;
 353
 354         /* use cached edid if we have one */
 355         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 356                 return drm_add_edid_modes(connector, lvds_connector->base.edid);
 357
 358         mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
 359         if (mode == NULL)
 360                 return 0;
 361
 362         drm_mode_probed_add(connector, mode);
 363         return 1;
 364 }
 365
 366 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
 367 {
 368         DRM_INFO("Skipping forced modeset for %s\n", id->ident);
 369         return 1;
 370 }
 371
 372 /* The GPU hangs up on these systems if modeset is performed on LID open */
 373 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
 374         {
 375                 .callback = intel_no_modeset_on_lid_dmi_callback,
 376                 .ident = "Toshiba Tecra A11",
 377                 .matches = {
 378                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 379                         DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
 380                 },
 381         },
 382
 383         { }     /* terminating entry */
 384 };
 385
 386 #if 0
 387 /*
 388  * Lid events. Note the use of 'modeset':
 389  *  - we set it to MODESET_ON_LID_OPEN on lid close,
 390  *    and set it to MODESET_DONE on open
 391  *  - we use it as a "only once" bit (ie we ignore
 392  *    duplicate events where it was already properly set)
 393  *  - the suspend/resume paths will set it to
 394  *    MODESET_SUSPENDED and ignore the lid open event,
 395  *    because they restore the mode ("lid open").
 396  */
 397 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
 398                             void *unused)
 399 {
 400         struct intel_lvds_connector *lvds_connector =
 401                 container_of(nb, struct intel_lvds_connector, lid_notifier);
 402         struct drm_connector *connector = &lvds_connector->base.base;
 403         struct drm_device *dev = connector->dev;
 404         struct drm_i915_private *dev_priv = dev->dev_private;
 405
 406         if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
 407                 return NOTIFY_OK;
 408
 409         mutex_lock(&dev_priv->modeset_restore_lock);
 410         if (dev_priv->modeset_restore == MODESET_SUSPENDED)
 411                 goto exit;
 412         /*
 413          * check and update the status of LVDS connector after receiving
 414          * the LID nofication event.
 415          */
 416         connector->status = connector->funcs->detect(connector, false);
 417
 418         /* Don't force modeset on machines where it causes a GPU lockup */
 419         if (dmi_check_system(intel_no_modeset_on_lid))
 420                 goto exit;
 421         if (!acpi_lid_open()) {
 422                 /* do modeset on next lid open event */
 423                 dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
 424                 goto exit;
 425         }
 426
 427         if (dev_priv->modeset_restore == MODESET_DONE)
 428                 goto exit;
 429
 430         drm_modeset_lock_all(dev);
 431         intel_modeset_setup_hw_state(dev, true);
 432         drm_modeset_unlock_all(dev);
 433
 434         dev_priv->modeset_restore = MODESET_DONE;
 435
 436 exit:
 437         mutex_unlock(&dev_priv->modeset_restore_lock);
 438         return NOTIFY_OK;
 439 }
 440 #endif
 441
 442 /**
 443  * intel_lvds_destroy - unregister and free LVDS structures
 444  * @connector: connector to free
 445  *
 446  * Unregister the DDC bus for this connector then free the driver private
 447  * structure.
 448  */
 449 static void intel_lvds_destroy(struct drm_connector *connector)
 450 {
 451         struct intel_lvds_connector *lvds_connector =
 452                 to_lvds_connector(connector);
 453
 454 #if 0
 455         if (lvds_connector->lid_notifier.notifier_call)
 456                 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
 457 #endif
 458
 459         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 460                 kfree(lvds_connector->base.edid);
 461
 462         intel_panel_fini(&lvds_connector->base.panel);
 463
 464 #if 0
 465         drm_sysfs_connector_remove(connector);
 466 #endif
 467         drm_connector_cleanup(connector);
 468         kfree(connector);
 469 }
 470
 471 static int intel_lvds_set_property(struct drm_connector *connector,
 472                                    struct drm_property *property,
 473                                    uint64_t value)
 474 {
 475         struct intel_connector *intel_connector = to_intel_connector(connector);
 476         struct drm_device *dev = connector->dev;
 477
 478         if (property == dev->mode_config.scaling_mode_property) {
 479                 struct drm_crtc *crtc;
 480
 481                 if (value == DRM_MODE_SCALE_NONE) {
 482                         DRM_DEBUG_KMS("no scaling not supported\n");
 483                         return -EINVAL;
 484                 }
 485
 486                 if (intel_connector->panel.fitting_mode == value) {
 487                         /* the LVDS scaling property is not changed */
 488                         return 0;
 489                 }
 490                 intel_connector->panel.fitting_mode = value;
 491
 492                 crtc = intel_attached_encoder(connector)->base.crtc;
 493                 if (crtc && crtc->enabled) {
 494                         /*
 495                          * If the CRTC is enabled, the display will be changed
 496                          * according to the new panel fitting mode.
 497                          */
 498                         intel_crtc_restore_mode(crtc);
 499                 }
 500         }
 501
 502         return 0;
 503 }
 504
 505 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
 506         .mode_set = intel_lvds_mode_set,
 507 };
 508
 509 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
 510         .get_modes = intel_lvds_get_modes,
 511         .mode_valid = intel_lvds_mode_valid,
 512         .best_encoder = intel_best_encoder,
 513 };
 514
 515 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
 516         .dpms = intel_connector_dpms,
 517         .detect = intel_lvds_detect,
 518         .fill_modes = drm_helper_probe_single_connector_modes,
 519         .set_property = intel_lvds_set_property,
 520         .destroy = intel_lvds_destroy,
 521 };
 522
 523 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
 524         .destroy = intel_encoder_destroy,
 525 };
 526
 527 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
 528 {
 529         DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
 530         return 1;
 531 }
 532
 533 /* These systems claim to have LVDS, but really don't */
 534 static const struct dmi_system_id intel_no_lvds[] = {
 535         {
 536                 .callback = intel_no_lvds_dmi_callback,
 537                 .ident = "Apple Mac Mini (Core series)",
 538                 .matches = {
 539                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 540                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
 541                 },
 542         },
 543         {
 544                 .callback = intel_no_lvds_dmi_callback,
 545                 .ident = "Apple Mac Mini (Core 2 series)",
 546                 .matches = {
 547                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 548                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
 549                 },
 550         },
 551         {
 552                 .callback = intel_no_lvds_dmi_callback,
 553                 .ident = "MSI IM-945GSE-A",
 554                 .matches = {
 555                         DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
 556                         DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
 557                 },
 558         },
 559         {
 560                 .callback = intel_no_lvds_dmi_callback,
 561                 .ident = "Dell Studio Hybrid",
 562                 .matches = {
 563                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 564                         DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
 565                 },
 566         },
 567         {
 568                 .callback = intel_no_lvds_dmi_callback,
 569                 .ident = "Dell OptiPlex FX170",
 570                 .matches = {
 571                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 572                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
 573                 },
 574         },
 575         {
 576                 .callback = intel_no_lvds_dmi_callback,
 577                 .ident = "AOpen Mini PC",
 578                 .matches = {
 579                         DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
 580                         DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
 581                 },
 582         },
 583         {
 584                 .callback = intel_no_lvds_dmi_callback,
 585                 .ident = "AOpen Mini PC MP915",
 586                 .matches = {
 587                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 588                         DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
 589                 },
 590         },
 591         {
 592                 .callback = intel_no_lvds_dmi_callback,
 593                 .ident = "AOpen i915GMm-HFS",
 594                 .matches = {
 595                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 596                         DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
 597                 },
 598         },
 599         {
 600                 .callback = intel_no_lvds_dmi_callback,
 601                 .ident = "AOpen i45GMx-I",
 602                 .matches = {
 603                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 604                         DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
 605                 },
 606         },
 607         {
 608                 .callback = intel_no_lvds_dmi_callback,
 609                 .ident = "Aopen i945GTt-VFA",
 610                 .matches = {
 611                         DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
 612                 },
 613         },
 614         {
 615                 .callback = intel_no_lvds_dmi_callback,
 616                 .ident = "Clientron U800",
 617                 .matches = {
 618                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 619                         DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
 620                 },
 621         },
 622         {
 623                 .callback = intel_no_lvds_dmi_callback,
 624                 .ident = "Clientron E830",
 625                 .matches = {
 626                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 627                         DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
 628                 },
 629         },
 630         {
 631                 .callback = intel_no_lvds_dmi_callback,
 632                 .ident = "Asus EeeBox PC EB1007",
 633                 .matches = {
 634                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 635                         DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
 636                 },
 637         },
 638         {
 639                 .callback = intel_no_lvds_dmi_callback,
 640                 .ident = "Asus AT5NM10T-I",
 641                 .matches = {
 642                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 643                         DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
 644                 },
 645         },
 646         {
 647                 .callback = intel_no_lvds_dmi_callback,
 648                 .ident = "Hewlett-Packard HP t5740",
 649                 .matches = {
 650                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 651                         DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
 652                 },
 653         },
 654         {
 655                 .callback = intel_no_lvds_dmi_callback,
 656                 .ident = "Hewlett-Packard t5745",
 657                 .matches = {
 658                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 659                         DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
 660                 },
 661         },
 662         {
 663                 .callback = intel_no_lvds_dmi_callback,
 664                 .ident = "Hewlett-Packard st5747",
 665                 .matches = {
 666                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 667                         DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
 668                 },
 669         },
 670         {
 671                 .callback = intel_no_lvds_dmi_callback,
 672                 .ident = "MSI Wind Box DC500",
 673                 .matches = {
 674                         DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
 675                         DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
 676                 },
 677         },
 678         {
 679                 .callback = intel_no_lvds_dmi_callback,
 680                 .ident = "Gigabyte GA-D525TUD",
 681                 .matches = {
 682                         DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
 683                         DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
 684                 },
 685         },
 686         {
 687                 .callback = intel_no_lvds_dmi_callback,
 688                 .ident = "Supermicro X7SPA-H",
 689                 .matches = {
 690                         DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
 691                         DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
 692                 },
 693         },
 694         {
 695                 .callback = intel_no_lvds_dmi_callback,
 696                 .ident = "Fujitsu Esprimo Q900",
 697                 .matches = {
 698                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 699                         DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
 700                 },
 701         },
 702         {
 703                 .callback = intel_no_lvds_dmi_callback,
 704                 .ident = "Intel D510MO",
 705                 .matches = {
 706                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 707                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
 708                 },
 709         },
 710         {
 711                 .callback = intel_no_lvds_dmi_callback,
 712                 .ident = "Intel D525MW",
 713                 .matches = {
 714                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 715                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
 716                 },
 717         },
 718
 719         { }     /* terminating entry */
 720 };
 721
 722 /**
 723  * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
 724  * @dev: drm device
 725  * @connector: LVDS connector
 726  *
 727  * Find the reduced downclock for LVDS in EDID.
 728  */
 729 static void intel_find_lvds_downclock(struct drm_device *dev,
 730                                       struct drm_display_mode *fixed_mode,
 731                                       struct drm_connector *connector)
 732 {
 733         struct drm_i915_private *dev_priv = dev->dev_private;
 734         struct drm_display_mode *scan;
 735         int temp_downclock;
 736
 737         temp_downclock = fixed_mode->clock;
 738         list_for_each_entry(scan, &connector->probed_modes, head) {
 739                 /*
 740                  * If one mode has the same resolution with the fixed_panel
 741                  * mode while they have the different refresh rate, it means
 742                  * that the reduced downclock is found for the LVDS. In such
 743                  * case we can set the different FPx0/1 to dynamically select
 744                  * between low and high frequency.
 745                  */
 746                 if (scan->hdisplay == fixed_mode->hdisplay &&
 747                     scan->hsync_start == fixed_mode->hsync_start &&
 748                     scan->hsync_end == fixed_mode->hsync_end &&
 749                     scan->htotal == fixed_mode->htotal &&
 750                     scan->vdisplay == fixed_mode->vdisplay &&
 751                     scan->vsync_start == fixed_mode->vsync_start &&
 752                     scan->vsync_end == fixed_mode->vsync_end &&
 753                     scan->vtotal == fixed_mode->vtotal) {
 754                         if (scan->clock < temp_downclock) {
 755                                 /*
 756                                  * The downclock is already found. But we
 757                                  * expect to find the lower downclock.
 758                                  */
 759                                 temp_downclock = scan->clock;
 760                         }
 761                 }
 762         }
 763         if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
 764                 /* We found the downclock for LVDS. */
 765                 dev_priv->lvds_downclock_avail = 1;
 766                 dev_priv->lvds_downclock = temp_downclock;
 767                 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
 768                               "Normal clock %dKhz, downclock %dKhz\n",
 769                               fixed_mode->clock, temp_downclock);
 770         }
 771 }
 772
 773 /*
 774  * Enumerate the child dev array parsed from VBT to check whether
 775  * the LVDS is present.
 776  * If it is present, return 1.
 777  * If it is not present, return false.
 778  * If no child dev is parsed from VBT, it assumes that the LVDS is present.
 779  */
 780 static bool lvds_is_present_in_vbt(struct drm_device *dev,
 781                                    u8 *i2c_pin)
 782 {
 783         struct drm_i915_private *dev_priv = dev->dev_private;
 784         int i;
 785
 786         if (!dev_priv->vbt.child_dev_num)
 787                 return true;
 788
 789         for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
 790                 struct child_device_config *child = dev_priv->vbt.child_dev + i;
 791
 792                 /* If the device type is not LFP, continue.
 793                  * We have to check both the new identifiers as well as the
 794                  * old for compatibility with some BIOSes.
 795                  */
 796                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
 797                     child->device_type != DEVICE_TYPE_LFP)
 798                         continue;
 799
 800                 if (intel_gmbus_is_port_valid(child->i2c_pin))
 801                         *i2c_pin = child->i2c_pin;
 802
 803                 /* However, we cannot trust the BIOS writers to populate
 804                  * the VBT correctly.  Since LVDS requires additional
 805                  * information from AIM blocks, a non-zero addin offset is
 806                  * a good indicator that the LVDS is actually present.
 807                  */
 808                 if (child->addin_offset)
 809                         return true;
 810
 811                 /* But even then some BIOS writers perform some black magic
 812                  * and instantiate the device without reference to any
 813                  * additional data.  Trust that if the VBT was written into
 814                  * the OpRegion then they have validated the LVDS's existence.
 815                  */
 816                 if (dev_priv->opregion.vbt)
 817                         return true;
 818         }
 819
 820         return false;
 821 }
 822
 823 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
 824 {
 825         DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
 826         return 1;
 827 }
 828
 829 static const struct dmi_system_id intel_dual_link_lvds[] = {
 830         {
 831                 .callback = intel_dual_link_lvds_callback,
 832                 .ident = "Apple MacBook Pro (Core i5/i7 Series)",
 833                 .matches = {
 834                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 835                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
 836                 },
 837         },
 838         { }     /* terminating entry */
 839 };
 840
 841 bool intel_is_dual_link_lvds(struct drm_device *dev)
 842 {
 843         struct intel_encoder *encoder;
 844         struct intel_lvds_encoder *lvds_encoder;
 845
 846         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
 847                             base.head) {
 848                 if (encoder->type == INTEL_OUTPUT_LVDS) {
 849                         lvds_encoder = to_lvds_encoder(&encoder->base);
 850
 851                         return lvds_encoder->is_dual_link;
 852                 }
 853         }
 854
 855         return false;
 856 }
 857
 858 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
 859 {
 860         struct drm_device *dev = lvds_encoder->base.base.dev;
 861         unsigned int val;
 862         struct drm_i915_private *dev_priv = dev->dev_private;
 863
 864         /* use the module option value if specified */
 865         if (i915_lvds_channel_mode > 0)
 866                 return i915_lvds_channel_mode == 2;
 867
 868         if (dmi_check_system(intel_dual_link_lvds))
 869                 return true;
 870
 871         /* BIOS should set the proper LVDS register value at boot, but
 872          * in reality, it doesn't set the value when the lid is closed;
 873          * we need to check "the value to be set" in VBT when LVDS
 874          * register is uninitialized.
 875          */
 876         val = I915_READ(lvds_encoder->reg);
 877         if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
 878                 val = dev_priv->vbt.bios_lvds_val;
 879
 880         return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
 881 }
 882
 883 static bool intel_lvds_supported(struct drm_device *dev)
 884 {
 885         /* With the introduction of the PCH we gained a dedicated
 886          * LVDS presence pin, use it. */
 887         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
 888                 return true;
 889
 890         /* Otherwise LVDS was only attached to mobile products,
 891          * except for the inglorious 830gm */
 892         if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 893                 return true;
 894
 895         return false;
 896 }
 897
 898 /**
 899  * intel_lvds_init - setup LVDS connectors on this device
 900  * @dev: drm device
 901  *
 902  * Create the connector, register the LVDS DDC bus, and try to figure out what
 903  * modes we can display on the LVDS panel (if present).
 904  */
 905 void intel_lvds_init(struct drm_device *dev)
 906 {
 907         struct drm_i915_private *dev_priv = dev->dev_private;
 908         struct intel_lvds_encoder *lvds_encoder;
 909         struct intel_encoder *intel_encoder;
 910         struct intel_lvds_connector *lvds_connector;
 911         struct intel_connector *intel_connector;
 912         struct drm_connector *connector;
 913         struct drm_encoder *encoder;
 914         struct drm_display_mode *scan; /* *modes, *bios_mode; */
 915         struct drm_display_mode *fixed_mode = NULL;
 916         struct edid *edid;
 917         struct drm_crtc *crtc;
 918         u32 lvds;
 919         int pipe;
 920         u8 pin;
 921
 922         if (!intel_lvds_supported(dev))
 923                 return;
 924
 925         /* Skip init on machines we know falsely report LVDS */
 926         if (dmi_check_system(intel_no_lvds))
 927                 return;
 928
 929         pin = GMBUS_PORT_PANEL;
 930         if (!lvds_is_present_in_vbt(dev, &pin)) {
 931                 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
 932                 return;
 933         }
 934
 935         if (HAS_PCH_SPLIT(dev)) {
 936                 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
 937                         return;
 938                 if (dev_priv->vbt.edp_support) {
 939                         DRM_DEBUG_KMS("disable LVDS for eDP support\n");
 940                         return;
 941                 }
 942         }
 943
 944         lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
 945         if (!lvds_encoder)
 946                 return;
 947
 948         lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
 949         if (!lvds_connector) {
 950                 kfree(lvds_encoder);
 951                 return;
 952         }
 953
 954         lvds_encoder->attached_connector = lvds_connector;
 955
 956         intel_encoder = &lvds_encoder->base;
 957         encoder = &intel_encoder->base;
 958         intel_connector = &lvds_connector->base;
 959         connector = &intel_connector->base;
 960         drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
 961                            DRM_MODE_CONNECTOR_LVDS);
 962
 963         drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
 964                          DRM_MODE_ENCODER_LVDS);
 965
 966         intel_encoder->enable = intel_enable_lvds;
 967         intel_encoder->pre_pll_enable = intel_pre_pll_enable_lvds;
 968         intel_encoder->compute_config = intel_lvds_compute_config;
 969         intel_encoder->disable = intel_disable_lvds;
 970         intel_encoder->get_hw_state = intel_lvds_get_hw_state;
 971         intel_encoder->get_config = intel_lvds_get_config;
 972         intel_connector->get_hw_state = intel_connector_get_hw_state;
 973
 974         intel_connector_attach_encoder(intel_connector, intel_encoder);
 975         intel_encoder->type = INTEL_OUTPUT_LVDS;
 976
 977         intel_encoder->cloneable = false;
 978         if (HAS_PCH_SPLIT(dev))
 979                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 980         else if (IS_GEN4(dev))
 981                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 982         else
 983                 intel_encoder->crtc_mask = (1 << 1);
 984
 985         drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
 986         drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
 987         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 988         connector->interlace_allowed = false;
 989         connector->doublescan_allowed = false;
 990
 991         if (HAS_PCH_SPLIT(dev)) {
 992                 lvds_encoder->reg = PCH_LVDS;
 993         } else {
 994                 lvds_encoder->reg = LVDS;
 995         }
 996
 997         /* create the scaling mode property */
 998         drm_mode_create_scaling_mode_property(dev);
 999         drm_object_attach_property(&connector->base,
1000                                       dev->mode_config.scaling_mode_property,
1001                                       DRM_MODE_SCALE_ASPECT);
1002         intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
1003         /*
1004          * LVDS discovery:
1005          * 1) check for EDID on DDC
1006          * 2) check for VBT data
1007          * 3) check to see if LVDS is already on
1008          *    if none of the above, no panel
1009          * 4) make sure lid is open
1010          *    if closed, act like it's not there for now
1011          */
1012
1013         /*
1014          * Attempt to get the fixed panel mode from DDC.  Assume that the
1015          * preferred mode is the right one.
1016          */
1017         edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1018         if (edid) {
1019                 if (drm_add_edid_modes(connector, edid)) {
1020                         drm_mode_connector_update_edid_property(connector,
1021                                                                 edid);
1022                 } else {
1023                         kfree(edid);
1024                         edid = ERR_PTR(-EINVAL);
1025                 }
1026         } else {
1027                 edid = ERR_PTR(-ENOENT);
1028         }
1029         lvds_connector->base.edid = edid;
1030
1031         if (IS_ERR_OR_NULL(edid)) {
1032                 /* Didn't get an EDID, so
1033                  * Set wide sync ranges so we get all modes
1034                  * handed to valid_mode for checking
1035                  */
1036                 connector->display_info.min_vfreq = 0;
1037                 connector->display_info.max_vfreq = 200;
1038                 connector->display_info.min_hfreq = 0;
1039                 connector->display_info.max_hfreq = 200;
1040         }
1041
1042         list_for_each_entry(scan, &connector->probed_modes, head) {
1043                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1044                         DRM_DEBUG_KMS("using preferred mode from EDID: ");
1045                         drm_mode_debug_printmodeline(scan);
1046
1047                         fixed_mode = drm_mode_duplicate(dev, scan);
1048                         if (fixed_mode) {
1049                                 intel_find_lvds_downclock(dev, fixed_mode,
1050                                                           connector);
1051                                 goto out;
1052                         }
1053                 }
1054         }
1055
1056         /* Failed to get EDID, what about VBT? */
1057         if (dev_priv->vbt.lfp_lvds_vbt_mode) {
1058                 DRM_DEBUG_KMS("using mode from VBT: ");
1059                 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
1060
1061                 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
1062                 if (fixed_mode) {
1063                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1064                         goto out;
1065                 }
1066         }
1067
1068         /*
1069          * If we didn't get EDID, try checking if the panel is already turned
1070          * on.  If so, assume that whatever is currently programmed is the
1071          * correct mode.
1072          */
1073
1074         /* Ironlake: FIXME if still fail, not try pipe mode now */
1075         if (HAS_PCH_SPLIT(dev))
1076                 goto failed;
1077
1078         lvds = I915_READ(LVDS);
1079         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1080         crtc = intel_get_crtc_for_pipe(dev, pipe);
1081
1082         if (crtc && (lvds & LVDS_PORT_EN)) {
1083                 fixed_mode = intel_crtc_mode_get(dev, crtc);
1084                 if (fixed_mode) {
1085                         DRM_DEBUG_KMS("using current (BIOS) mode: ");
1086                         drm_mode_debug_printmodeline(fixed_mode);
1087                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1088                         goto out;
1089                 }
1090         }
1091
1092         /* If we still don't have a mode after all that, give up. */
1093         if (!fixed_mode)
1094                 goto failed;
1095
1096 out:
1097         lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1098         DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1099                       lvds_encoder->is_dual_link ? "dual" : "single");
1100
1101         /*
1102          * Unlock registers and just
1103          * leave them unlocked
1104          */
1105         if (HAS_PCH_SPLIT(dev)) {
1106                 I915_WRITE(PCH_PP_CONTROL,
1107                            I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1108         } else {
1109                 I915_WRITE(PP_CONTROL,
1110                            I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1111         }
1112 #if 0
1113         lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1114         if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1115                 DRM_DEBUG_KMS("lid notifier registration failed\n");
1116                 lvds_connector->lid_notifier.notifier_call = NULL;
1117         }
1118         drm_sysfs_connector_add(connector);
1119 #endif
1120
1121         intel_panel_init(&intel_connector->panel, fixed_mode);
1122         intel_panel_setup_backlight(connector);
1123
1124         return;
1125
1126 failed:
1127         DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1128         drm_connector_cleanup(connector);
1129         drm_encoder_cleanup(encoder);
1130         if (fixed_mode)
1131                 drm_mode_destroy(dev, fixed_mode);
1132         kfree(lvds_encoder);
1133         kfree(lvds_connector);
1134         return;
1135 }