drivers/gpu/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 <acpi/button.h>
  31 #include <linux/dmi.h>
  32 #include <linux/i2c.h>
  33 #include <linux/slab.h>
  34 #include <drm/drmP.h>
  35 #include <drm/drm_crtc.h>
  36 #include <drm/drm_edid.h>
  37 #include "intel_drv.h"
  38 #include <drm/i915_drm.h>
  39 #include "i915_drv.h"
  40 #include <linux/acpi.h>
  41
  42 /* Private structure for the integrated LVDS support */
  43 struct intel_lvds_connector {
  44         struct intel_connector base;
  45
  46         struct notifier_block lid_notifier;
  47 };
  48
  49 struct intel_lvds_encoder {
  50         struct intel_encoder base;
  51
  52         bool is_dual_link;
  53         u32 reg;
  54
  55         struct intel_lvds_connector *attached_connector;
  56 };
  57
  58 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
  59 {
  60         return container_of(encoder, struct intel_lvds_encoder, base.base);
  61 }
  62
  63 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
  64 {
  65         return container_of(connector, struct intel_lvds_connector, base.base);
  66 }
  67
  68 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
  69                                     enum pipe *pipe)
  70 {
  71         struct drm_device *dev = encoder->base.dev;
  72         struct drm_i915_private *dev_priv = dev->dev_private;
  73         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
  74         u32 tmp;
  75
  76         tmp = I915_READ(lvds_encoder->reg);
  77
  78         if (!(tmp & LVDS_PORT_EN))
  79                 return false;
  80
  81         if (HAS_PCH_CPT(dev))
  82                 *pipe = PORT_TO_PIPE_CPT(tmp);
  83         else
  84                 *pipe = PORT_TO_PIPE(tmp);
  85
  86         return true;
  87 }
  88
  89 static void intel_lvds_get_config(struct intel_encoder *encoder,
  90                                   struct intel_crtc_config *pipe_config)
  91 {
  92         struct drm_device *dev = encoder->base.dev;
  93         struct drm_i915_private *dev_priv = dev->dev_private;
  94         u32 lvds_reg, tmp, flags = 0;
  95
  96         if (HAS_PCH_SPLIT(dev))
  97                 lvds_reg = PCH_LVDS;
  98         else
  99                 lvds_reg = LVDS;
 100
 101         tmp = I915_READ(lvds_reg);
 102         if (tmp & LVDS_HSYNC_POLARITY)
 103                 flags |= DRM_MODE_FLAG_NHSYNC;
 104         else
 105                 flags |= DRM_MODE_FLAG_PHSYNC;
 106         if (tmp & LVDS_VSYNC_POLARITY)
 107                 flags |= DRM_MODE_FLAG_NVSYNC;
 108         else
 109                 flags |= DRM_MODE_FLAG_PVSYNC;
 110
 111         pipe_config->adjusted_mode.flags |= flags;
 112
 113         /* gen2/3 store dither state in pfit control, needs to match */
 114         if (INTEL_INFO(dev)->gen < 4) {
 115                 tmp = I915_READ(PFIT_CONTROL);
 116
 117                 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
 118         }
 119 }
 120
 121 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
 122  * This is an exception to the general rule that mode_set doesn't turn
 123  * things on.
 124  */
 125 static void intel_pre_pll_enable_lvds(struct intel_encoder *encoder)
 126 {
 127         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 128         struct drm_device *dev = encoder->base.dev;
 129         struct drm_i915_private *dev_priv = dev->dev_private;
 130         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 131         struct drm_display_mode *fixed_mode =
 132                 lvds_encoder->attached_connector->base.panel.fixed_mode;
 133         int pipe = intel_crtc->pipe;
 134         u32 temp;
 135
 136         temp = I915_READ(lvds_encoder->reg);
 137         temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
 138
 139         if (HAS_PCH_CPT(dev)) {
 140                 temp &= ~PORT_TRANS_SEL_MASK;
 141                 temp |= PORT_TRANS_SEL_CPT(pipe);
 142         } else {
 143                 if (pipe == 1) {
 144                         temp |= LVDS_PIPEB_SELECT;
 145                 } else {
 146                         temp &= ~LVDS_PIPEB_SELECT;
 147                 }
 148         }
 149
 150         /* set the corresponsding LVDS_BORDER bit */
 151         temp &= ~LVDS_BORDER_ENABLE;
 152         temp |= intel_crtc->config.gmch_pfit.lvds_border_bits;
 153         /* Set the B0-B3 data pairs corresponding to whether we're going to
 154          * set the DPLLs for dual-channel mode or not.
 155          */
 156         if (lvds_encoder->is_dual_link)
 157                 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
 158         else
 159                 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
 160
 161         /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
 162          * appropriately here, but we need to look more thoroughly into how
 163          * panels behave in the two modes.
 164          */
 165
 166         /* Set the dithering flag on LVDS as needed, note that there is no
 167          * special lvds dither control bit on pch-split platforms, dithering is
 168          * only controlled through the PIPECONF reg. */
 169         if (INTEL_INFO(dev)->gen == 4) {
 170                 /* Bspec wording suggests that LVDS port dithering only exists
 171                  * for 18bpp panels. */
 172                 if (intel_crtc->config.dither &&
 173                     intel_crtc->config.pipe_bpp == 18)
 174                         temp |= LVDS_ENABLE_DITHER;
 175                 else
 176                         temp &= ~LVDS_ENABLE_DITHER;
 177         }
 178         temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
 179         if (fixed_mode->flags & DRM_MODE_FLAG_NHSYNC)
 180                 temp |= LVDS_HSYNC_POLARITY;
 181         if (fixed_mode->flags & DRM_MODE_FLAG_NVSYNC)
 182                 temp |= LVDS_VSYNC_POLARITY;
 183
 184         I915_WRITE(lvds_encoder->reg, temp);
 185 }
 186
 187 /**
 188  * Sets the power state for the panel.
 189  */
 190 static void intel_enable_lvds(struct intel_encoder *encoder)
 191 {
 192         struct drm_device *dev = encoder->base.dev;
 193         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 194         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 195         struct drm_i915_private *dev_priv = dev->dev_private;
 196         u32 ctl_reg, stat_reg;
 197
 198         if (HAS_PCH_SPLIT(dev)) {
 199                 ctl_reg = PCH_PP_CONTROL;
 200                 stat_reg = PCH_PP_STATUS;
 201         } else {
 202                 ctl_reg = PP_CONTROL;
 203                 stat_reg = PP_STATUS;
 204         }
 205
 206         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
 207
 208         I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
 209         POSTING_READ(lvds_encoder->reg);
 210         if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
 211                 DRM_ERROR("timed out waiting for panel to power on\n");
 212
 213         intel_panel_enable_backlight(dev, intel_crtc->pipe);
 214 }
 215
 216 static void intel_disable_lvds(struct intel_encoder *encoder)
 217 {
 218         struct drm_device *dev = encoder->base.dev;
 219         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
 220         struct drm_i915_private *dev_priv = dev->dev_private;
 221         u32 ctl_reg, stat_reg;
 222
 223         if (HAS_PCH_SPLIT(dev)) {
 224                 ctl_reg = PCH_PP_CONTROL;
 225                 stat_reg = PCH_PP_STATUS;
 226         } else {
 227                 ctl_reg = PP_CONTROL;
 228                 stat_reg = PP_STATUS;
 229         }
 230
 231         intel_panel_disable_backlight(dev);
 232
 233         I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
 234         if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
 235                 DRM_ERROR("timed out waiting for panel to power off\n");
 236
 237         I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
 238         POSTING_READ(lvds_encoder->reg);
 239 }
 240
 241 static int intel_lvds_mode_valid(struct drm_connector *connector,
 242                                  struct drm_display_mode *mode)
 243 {
 244         struct intel_connector *intel_connector = to_intel_connector(connector);
 245         struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 246
 247         if (mode->hdisplay > fixed_mode->hdisplay)
 248                 return MODE_PANEL;
 249         if (mode->vdisplay > fixed_mode->vdisplay)
 250                 return MODE_PANEL;
 251
 252         return MODE_OK;
 253 }
 254
 255 static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
 256                                       struct intel_crtc_config *pipe_config)
 257 {
 258         struct drm_device *dev = intel_encoder->base.dev;
 259         struct drm_i915_private *dev_priv = dev->dev_private;
 260         struct intel_lvds_encoder *lvds_encoder =
 261                 to_lvds_encoder(&intel_encoder->base);
 262         struct intel_connector *intel_connector =
 263                 &lvds_encoder->attached_connector->base;
 264         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
 265         struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
 266         unsigned int lvds_bpp;
 267
 268         /* Should never happen!! */
 269         if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
 270                 DRM_ERROR("Can't support LVDS on pipe A\n");
 271                 return false;
 272         }
 273
 274         if ((I915_READ(lvds_encoder->reg) & LVDS_A3_POWER_MASK) ==
 275             LVDS_A3_POWER_UP)
 276                 lvds_bpp = 8*3;
 277         else
 278                 lvds_bpp = 6*3;
 279
 280         if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
 281                 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
 282                               pipe_config->pipe_bpp, lvds_bpp);
 283                 pipe_config->pipe_bpp = lvds_bpp;
 284         }
 285
 286         /*
 287          * We have timings from the BIOS for the panel, put them in
 288          * to the adjusted mode.  The CRTC will be set up for this mode,
 289          * with the panel scaling set up to source from the H/VDisplay
 290          * of the original mode.
 291          */
 292         intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
 293                                adjusted_mode);
 294
 295         if (HAS_PCH_SPLIT(dev)) {
 296                 pipe_config->has_pch_encoder = true;
 297
 298                 intel_pch_panel_fitting(intel_crtc, pipe_config,
 299                                         intel_connector->panel.fitting_mode);
 300         } else {
 301                 intel_gmch_panel_fitting(intel_crtc, pipe_config,
 302                                          intel_connector->panel.fitting_mode);
 303
 304         }
 305
 306         /*
 307          * XXX: It would be nice to support lower refresh rates on the
 308          * panels to reduce power consumption, and perhaps match the
 309          * user's requested refresh rate.
 310          */
 311
 312         return true;
 313 }
 314
 315 static void intel_lvds_mode_set(struct drm_encoder *encoder,
 316                                 struct drm_display_mode *mode,
 317                                 struct drm_display_mode *adjusted_mode)
 318 {
 319         /*
 320          * The LVDS pin pair will already have been turned on in the
 321          * intel_crtc_mode_set since it has a large impact on the DPLL
 322          * settings.
 323          */
 324 }
 325
 326 /**
 327  * Detect the LVDS connection.
 328  *
 329  * Since LVDS doesn't have hotlug, we use the lid as a proxy.  Open means
 330  * connected and closed means disconnected.  We also send hotplug events as
 331  * needed, using lid status notification from the input layer.
 332  */
 333 static enum drm_connector_status
 334 intel_lvds_detect(struct drm_connector *connector, bool force)
 335 {
 336         struct drm_device *dev = connector->dev;
 337         enum drm_connector_status status;
 338
 339         status = intel_panel_detect(dev);
 340         if (status != connector_status_unknown)
 341                 return status;
 342
 343         return connector_status_connected;
 344 }
 345
 346 /**
 347  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 348  */
 349 static int intel_lvds_get_modes(struct drm_connector *connector)
 350 {
 351         struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
 352         struct drm_device *dev = connector->dev;
 353         struct drm_display_mode *mode;
 354
 355         /* use cached edid if we have one */
 356         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 357                 return drm_add_edid_modes(connector, lvds_connector->base.edid);
 358
 359         mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
 360         if (mode == NULL)
 361                 return 0;
 362
 363         drm_mode_probed_add(connector, mode);
 364         return 1;
 365 }
 366
 367 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
 368 {
 369         DRM_INFO("Skipping forced modeset for %s\n", id->ident);
 370         return 1;
 371 }
 372
 373 /* The GPU hangs up on these systems if modeset is performed on LID open */
 374 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
 375         {
 376                 .callback = intel_no_modeset_on_lid_dmi_callback,
 377                 .ident = "Toshiba Tecra A11",
 378                 .matches = {
 379                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 380                         DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
 381                 },
 382         },
 383
 384         { }     /* terminating entry */
 385 };
 386
 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
 441 /**
 442  * intel_lvds_destroy - unregister and free LVDS structures
 443  * @connector: connector to free
 444  *
 445  * Unregister the DDC bus for this connector then free the driver private
 446  * structure.
 447  */
 448 static void intel_lvds_destroy(struct drm_connector *connector)
 449 {
 450         struct intel_lvds_connector *lvds_connector =
 451                 to_lvds_connector(connector);
 452
 453         if (lvds_connector->lid_notifier.notifier_call)
 454                 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
 455
 456         if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
 457                 kfree(lvds_connector->base.edid);
 458
 459         intel_panel_fini(&lvds_connector->base.panel);
 460
 461         drm_sysfs_connector_remove(connector);
 462         drm_connector_cleanup(connector);
 463         kfree(connector);
 464 }
 465
 466 static int intel_lvds_set_property(struct drm_connector *connector,
 467                                    struct drm_property *property,
 468                                    uint64_t value)
 469 {
 470         struct intel_connector *intel_connector = to_intel_connector(connector);
 471         struct drm_device *dev = connector->dev;
 472
 473         if (property == dev->mode_config.scaling_mode_property) {
 474                 struct drm_crtc *crtc;
 475
 476                 if (value == DRM_MODE_SCALE_NONE) {
 477                         DRM_DEBUG_KMS("no scaling not supported\n");
 478                         return -EINVAL;
 479                 }
 480
 481                 if (intel_connector->panel.fitting_mode == value) {
 482                         /* the LVDS scaling property is not changed */
 483                         return 0;
 484                 }
 485                 intel_connector->panel.fitting_mode = value;
 486
 487                 crtc = intel_attached_encoder(connector)->base.crtc;
 488                 if (crtc && crtc->enabled) {
 489                         /*
 490                          * If the CRTC is enabled, the display will be changed
 491                          * according to the new panel fitting mode.
 492                          */
 493                         intel_crtc_restore_mode(crtc);
 494                 }
 495         }
 496
 497         return 0;
 498 }
 499
 500 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
 501         .mode_set = intel_lvds_mode_set,
 502 };
 503
 504 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
 505         .get_modes = intel_lvds_get_modes,
 506         .mode_valid = intel_lvds_mode_valid,
 507         .best_encoder = intel_best_encoder,
 508 };
 509
 510 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
 511         .dpms = intel_connector_dpms,
 512         .detect = intel_lvds_detect,
 513         .fill_modes = drm_helper_probe_single_connector_modes,
 514         .set_property = intel_lvds_set_property,
 515         .destroy = intel_lvds_destroy,
 516 };
 517
 518 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
 519         .destroy = intel_encoder_destroy,
 520 };
 521
 522 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
 523 {
 524         DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
 525         return 1;
 526 }
 527
 528 /* These systems claim to have LVDS, but really don't */
 529 static const struct dmi_system_id intel_no_lvds[] = {
 530         {
 531                 .callback = intel_no_lvds_dmi_callback,
 532                 .ident = "Apple Mac Mini (Core series)",
 533                 .matches = {
 534                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 535                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
 536                 },
 537         },
 538         {
 539                 .callback = intel_no_lvds_dmi_callback,
 540                 .ident = "Apple Mac Mini (Core 2 series)",
 541                 .matches = {
 542                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 543                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
 544                 },
 545         },
 546         {
 547                 .callback = intel_no_lvds_dmi_callback,
 548                 .ident = "MSI IM-945GSE-A",
 549                 .matches = {
 550                         DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
 551                         DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
 552                 },
 553         },
 554         {
 555                 .callback = intel_no_lvds_dmi_callback,
 556                 .ident = "Dell Studio Hybrid",
 557                 .matches = {
 558                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 559                         DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
 560                 },
 561         },
 562         {
 563                 .callback = intel_no_lvds_dmi_callback,
 564                 .ident = "Dell OptiPlex FX170",
 565                 .matches = {
 566                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 567                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
 568                 },
 569         },
 570         {
 571                 .callback = intel_no_lvds_dmi_callback,
 572                 .ident = "AOpen Mini PC",
 573                 .matches = {
 574                         DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
 575                         DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
 576                 },
 577         },
 578         {
 579                 .callback = intel_no_lvds_dmi_callback,
 580                 .ident = "AOpen Mini PC MP915",
 581                 .matches = {
 582                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 583                         DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
 584                 },
 585         },
 586         {
 587                 .callback = intel_no_lvds_dmi_callback,
 588                 .ident = "AOpen i915GMm-HFS",
 589                 .matches = {
 590                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 591                         DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
 592                 },
 593         },
 594         {
 595                 .callback = intel_no_lvds_dmi_callback,
 596                 .ident = "AOpen i45GMx-I",
 597                 .matches = {
 598                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 599                         DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
 600                 },
 601         },
 602         {
 603                 .callback = intel_no_lvds_dmi_callback,
 604                 .ident = "Aopen i945GTt-VFA",
 605                 .matches = {
 606                         DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
 607                 },
 608         },
 609         {
 610                 .callback = intel_no_lvds_dmi_callback,
 611                 .ident = "Clientron U800",
 612                 .matches = {
 613                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 614                         DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
 615                 },
 616         },
 617         {
 618                 .callback = intel_no_lvds_dmi_callback,
 619                 .ident = "Clientron E830",
 620                 .matches = {
 621                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 622                         DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
 623                 },
 624         },
 625         {
 626                 .callback = intel_no_lvds_dmi_callback,
 627                 .ident = "Asus EeeBox PC EB1007",
 628                 .matches = {
 629                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 630                         DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
 631                 },
 632         },
 633         {
 634                 .callback = intel_no_lvds_dmi_callback,
 635                 .ident = "Asus AT5NM10T-I",
 636                 .matches = {
 637                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 638                         DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
 639                 },
 640         },
 641         {
 642                 .callback = intel_no_lvds_dmi_callback,
 643                 .ident = "Hewlett-Packard HP t5740",
 644                 .matches = {
 645                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 646                         DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
 647                 },
 648         },
 649         {
 650                 .callback = intel_no_lvds_dmi_callback,
 651                 .ident = "Hewlett-Packard t5745",
 652                 .matches = {
 653                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 654                         DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
 655                 },
 656         },
 657         {
 658                 .callback = intel_no_lvds_dmi_callback,
 659                 .ident = "Hewlett-Packard st5747",
 660                 .matches = {
 661                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 662                         DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
 663                 },
 664         },
 665         {
 666                 .callback = intel_no_lvds_dmi_callback,
 667                 .ident = "MSI Wind Box DC500",
 668                 .matches = {
 669                         DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
 670                         DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
 671                 },
 672         },
 673         {
 674                 .callback = intel_no_lvds_dmi_callback,
 675                 .ident = "Gigabyte GA-D525TUD",
 676                 .matches = {
 677                         DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
 678                         DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
 679                 },
 680         },
 681         {
 682                 .callback = intel_no_lvds_dmi_callback,
 683                 .ident = "Supermicro X7SPA-H",
 684                 .matches = {
 685                         DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
 686                         DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
 687                 },
 688         },
 689         {
 690                 .callback = intel_no_lvds_dmi_callback,
 691                 .ident = "Fujitsu Esprimo Q900",
 692                 .matches = {
 693                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 694                         DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
 695                 },
 696         },
 697         {
 698                 .callback = intel_no_lvds_dmi_callback,
 699                 .ident = "Intel D510MO",
 700                 .matches = {
 701                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 702                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
 703                 },
 704         },
 705         {
 706                 .callback = intel_no_lvds_dmi_callback,
 707                 .ident = "Intel D525MW",
 708                 .matches = {
 709                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 710                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
 711                 },
 712         },
 713
 714         { }     /* terminating entry */
 715 };
 716
 717 /**
 718  * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
 719  * @dev: drm device
 720  * @connector: LVDS connector
 721  *
 722  * Find the reduced downclock for LVDS in EDID.
 723  */
 724 static void intel_find_lvds_downclock(struct drm_device *dev,
 725                                       struct drm_display_mode *fixed_mode,
 726                                       struct drm_connector *connector)
 727 {
 728         struct drm_i915_private *dev_priv = dev->dev_private;
 729         struct drm_display_mode *scan;
 730         int temp_downclock;
 731
 732         temp_downclock = fixed_mode->clock;
 733         list_for_each_entry(scan, &connector->probed_modes, head) {
 734                 /*
 735                  * If one mode has the same resolution with the fixed_panel
 736                  * mode while they have the different refresh rate, it means
 737                  * that the reduced downclock is found for the LVDS. In such
 738                  * case we can set the different FPx0/1 to dynamically select
 739                  * between low and high frequency.
 740                  */
 741                 if (scan->hdisplay == fixed_mode->hdisplay &&
 742                     scan->hsync_start == fixed_mode->hsync_start &&
 743                     scan->hsync_end == fixed_mode->hsync_end &&
 744                     scan->htotal == fixed_mode->htotal &&
 745                     scan->vdisplay == fixed_mode->vdisplay &&
 746                     scan->vsync_start == fixed_mode->vsync_start &&
 747                     scan->vsync_end == fixed_mode->vsync_end &&
 748                     scan->vtotal == fixed_mode->vtotal) {
 749                         if (scan->clock < temp_downclock) {
 750                                 /*
 751                                  * The downclock is already found. But we
 752                                  * expect to find the lower downclock.
 753                                  */
 754                                 temp_downclock = scan->clock;
 755                         }
 756                 }
 757         }
 758         if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
 759                 /* We found the downclock for LVDS. */
 760                 dev_priv->lvds_downclock_avail = 1;
 761                 dev_priv->lvds_downclock = temp_downclock;
 762                 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
 763                               "Normal clock %dKhz, downclock %dKhz\n",
 764                               fixed_mode->clock, temp_downclock);
 765         }
 766 }
 767
 768 /*
 769  * Enumerate the child dev array parsed from VBT to check whether
 770  * the LVDS is present.
 771  * If it is present, return 1.
 772  * If it is not present, return false.
 773  * If no child dev is parsed from VBT, it assumes that the LVDS is present.
 774  */
 775 static bool lvds_is_present_in_vbt(struct drm_device *dev,
 776                                    u8 *i2c_pin)
 777 {
 778         struct drm_i915_private *dev_priv = dev->dev_private;
 779         int i;
 780
 781         if (!dev_priv->vbt.child_dev_num)
 782                 return true;
 783
 784         for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
 785                 struct child_device_config *child = dev_priv->vbt.child_dev + i;
 786
 787                 /* If the device type is not LFP, continue.
 788                  * We have to check both the new identifiers as well as the
 789                  * old for compatibility with some BIOSes.
 790                  */
 791                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
 792                     child->device_type != DEVICE_TYPE_LFP)
 793                         continue;
 794
 795                 if (intel_gmbus_is_port_valid(child->i2c_pin))
 796                         *i2c_pin = child->i2c_pin;
 797
 798                 /* However, we cannot trust the BIOS writers to populate
 799                  * the VBT correctly.  Since LVDS requires additional
 800                  * information from AIM blocks, a non-zero addin offset is
 801                  * a good indicator that the LVDS is actually present.
 802                  */
 803                 if (child->addin_offset)
 804                         return true;
 805
 806                 /* But even then some BIOS writers perform some black magic
 807                  * and instantiate the device without reference to any
 808                  * additional data.  Trust that if the VBT was written into
 809                  * the OpRegion then they have validated the LVDS's existence.
 810                  */
 811                 if (dev_priv->opregion.vbt)
 812                         return true;
 813         }
 814
 815         return false;
 816 }
 817
 818 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
 819 {
 820         DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
 821         return 1;
 822 }
 823
 824 static const struct dmi_system_id intel_dual_link_lvds[] = {
 825         {
 826                 .callback = intel_dual_link_lvds_callback,
 827                 .ident = "Apple MacBook Pro (Core i5/i7 Series)",
 828                 .matches = {
 829                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 830                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
 831                 },
 832         },
 833         { }     /* terminating entry */
 834 };
 835
 836 bool intel_is_dual_link_lvds(struct drm_device *dev)
 837 {
 838         struct intel_encoder *encoder;
 839         struct intel_lvds_encoder *lvds_encoder;
 840
 841         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
 842                             base.head) {
 843                 if (encoder->type == INTEL_OUTPUT_LVDS) {
 844                         lvds_encoder = to_lvds_encoder(&encoder->base);
 845
 846                         return lvds_encoder->is_dual_link;
 847                 }
 848         }
 849
 850         return false;
 851 }
 852
 853 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
 854 {
 855         struct drm_device *dev = lvds_encoder->base.base.dev;
 856         unsigned int val;
 857         struct drm_i915_private *dev_priv = dev->dev_private;
 858
 859         /* use the module option value if specified */
 860         if (i915_lvds_channel_mode > 0)
 861                 return i915_lvds_channel_mode == 2;
 862
 863         if (dmi_check_system(intel_dual_link_lvds))
 864                 return true;
 865
 866         /* BIOS should set the proper LVDS register value at boot, but
 867          * in reality, it doesn't set the value when the lid is closed;
 868          * we need to check "the value to be set" in VBT when LVDS
 869          * register is uninitialized.
 870          */
 871         val = I915_READ(lvds_encoder->reg);
 872         if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
 873                 val = dev_priv->vbt.bios_lvds_val;
 874
 875         return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
 876 }
 877
 878 static bool intel_lvds_supported(struct drm_device *dev)
 879 {
 880         /* With the introduction of the PCH we gained a dedicated
 881          * LVDS presence pin, use it. */
 882         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
 883                 return true;
 884
 885         /* Otherwise LVDS was only attached to mobile products,
 886          * except for the inglorious 830gm */
 887         if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 888                 return true;
 889
 890         return false;
 891 }
 892
 893 /**
 894  * intel_lvds_init - setup LVDS connectors on this device
 895  * @dev: drm device
 896  *
 897  * Create the connector, register the LVDS DDC bus, and try to figure out what
 898  * modes we can display on the LVDS panel (if present).
 899  */
 900 void intel_lvds_init(struct drm_device *dev)
 901 {
 902         struct drm_i915_private *dev_priv = dev->dev_private;
 903         struct intel_lvds_encoder *lvds_encoder;
 904         struct intel_encoder *intel_encoder;
 905         struct intel_lvds_connector *lvds_connector;
 906         struct intel_connector *intel_connector;
 907         struct drm_connector *connector;
 908         struct drm_encoder *encoder;
 909         struct drm_display_mode *scan; /* *modes, *bios_mode; */
 910         struct drm_display_mode *fixed_mode = NULL;
 911         struct edid *edid;
 912         struct drm_crtc *crtc;
 913         u32 lvds;
 914         int pipe;
 915         u8 pin;
 916
 917         if (!intel_lvds_supported(dev))
 918                 return;
 919
 920         /* Skip init on machines we know falsely report LVDS */
 921         if (dmi_check_system(intel_no_lvds))
 922                 return;
 923
 924         pin = GMBUS_PORT_PANEL;
 925         if (!lvds_is_present_in_vbt(dev, &pin)) {
 926                 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
 927                 return;
 928         }
 929
 930         if (HAS_PCH_SPLIT(dev)) {
 931                 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
 932                         return;
 933                 if (dev_priv->vbt.edp_support) {
 934                         DRM_DEBUG_KMS("disable LVDS for eDP support\n");
 935                         return;
 936                 }
 937         }
 938
 939         lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
 940         if (!lvds_encoder)
 941                 return;
 942
 943         lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
 944         if (!lvds_connector) {
 945                 kfree(lvds_encoder);
 946                 return;
 947         }
 948
 949         lvds_encoder->attached_connector = lvds_connector;
 950
 951         intel_encoder = &lvds_encoder->base;
 952         encoder = &intel_encoder->base;
 953         intel_connector = &lvds_connector->base;
 954         connector = &intel_connector->base;
 955         drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
 956                            DRM_MODE_CONNECTOR_LVDS);
 957
 958         drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
 959                          DRM_MODE_ENCODER_LVDS);
 960
 961         intel_encoder->enable = intel_enable_lvds;
 962         intel_encoder->pre_pll_enable = intel_pre_pll_enable_lvds;
 963         intel_encoder->compute_config = intel_lvds_compute_config;
 964         intel_encoder->disable = intel_disable_lvds;
 965         intel_encoder->get_hw_state = intel_lvds_get_hw_state;
 966         intel_encoder->get_config = intel_lvds_get_config;
 967         intel_connector->get_hw_state = intel_connector_get_hw_state;
 968
 969         intel_connector_attach_encoder(intel_connector, intel_encoder);
 970         intel_encoder->type = INTEL_OUTPUT_LVDS;
 971
 972         intel_encoder->cloneable = false;
 973         if (HAS_PCH_SPLIT(dev))
 974                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 975         else if (IS_GEN4(dev))
 976                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 977         else
 978                 intel_encoder->crtc_mask = (1 << 1);
 979
 980         drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
 981         drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
 982         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 983         connector->interlace_allowed = false;
 984         connector->doublescan_allowed = false;
 985
 986         if (HAS_PCH_SPLIT(dev)) {
 987                 lvds_encoder->reg = PCH_LVDS;
 988         } else {
 989                 lvds_encoder->reg = LVDS;
 990         }
 991
 992         /* create the scaling mode property */
 993         drm_mode_create_scaling_mode_property(dev);
 994         drm_object_attach_property(&connector->base,
 995                                       dev->mode_config.scaling_mode_property,
 996                                       DRM_MODE_SCALE_ASPECT);
 997         intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
 998         /*
 999          * LVDS discovery:
1000          * 1) check for EDID on DDC
1001          * 2) check for VBT data
1002          * 3) check to see if LVDS is already on
1003          *    if none of the above, no panel
1004          * 4) make sure lid is open
1005          *    if closed, act like it's not there for now
1006          */
1007
1008         /*
1009          * Attempt to get the fixed panel mode from DDC.  Assume that the
1010          * preferred mode is the right one.
1011          */
1012         edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1013         if (edid) {
1014                 if (drm_add_edid_modes(connector, edid)) {
1015                         drm_mode_connector_update_edid_property(connector,
1016                                                                 edid);
1017                 } else {
1018                         kfree(edid);
1019                         edid = ERR_PTR(-EINVAL);
1020                 }
1021         } else {
1022                 edid = ERR_PTR(-ENOENT);
1023         }
1024         lvds_connector->base.edid = edid;
1025
1026         if (IS_ERR_OR_NULL(edid)) {
1027                 /* Didn't get an EDID, so
1028                  * Set wide sync ranges so we get all modes
1029                  * handed to valid_mode for checking
1030                  */
1031                 connector->display_info.min_vfreq = 0;
1032                 connector->display_info.max_vfreq = 200;
1033                 connector->display_info.min_hfreq = 0;
1034                 connector->display_info.max_hfreq = 200;
1035         }
1036
1037         list_for_each_entry(scan, &connector->probed_modes, head) {
1038                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1039                         DRM_DEBUG_KMS("using preferred mode from EDID: ");
1040                         drm_mode_debug_printmodeline(scan);
1041
1042                         fixed_mode = drm_mode_duplicate(dev, scan);
1043                         if (fixed_mode) {
1044                                 intel_find_lvds_downclock(dev, fixed_mode,
1045                                                           connector);
1046                                 goto out;
1047                         }
1048                 }
1049         }
1050
1051         /* Failed to get EDID, what about VBT? */
1052         if (dev_priv->vbt.lfp_lvds_vbt_mode) {
1053                 DRM_DEBUG_KMS("using mode from VBT: ");
1054                 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
1055
1056                 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
1057                 if (fixed_mode) {
1058                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1059                         goto out;
1060                 }
1061         }
1062
1063         /*
1064          * If we didn't get EDID, try checking if the panel is already turned
1065          * on.  If so, assume that whatever is currently programmed is the
1066          * correct mode.
1067          */
1068
1069         /* Ironlake: FIXME if still fail, not try pipe mode now */
1070         if (HAS_PCH_SPLIT(dev))
1071                 goto failed;
1072
1073         lvds = I915_READ(LVDS);
1074         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1075         crtc = intel_get_crtc_for_pipe(dev, pipe);
1076
1077         if (crtc && (lvds & LVDS_PORT_EN)) {
1078                 fixed_mode = intel_crtc_mode_get(dev, crtc);
1079                 if (fixed_mode) {
1080                         DRM_DEBUG_KMS("using current (BIOS) mode: ");
1081                         drm_mode_debug_printmodeline(fixed_mode);
1082                         fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1083                         goto out;
1084                 }
1085         }
1086
1087         /* If we still don't have a mode after all that, give up. */
1088         if (!fixed_mode)
1089                 goto failed;
1090
1091 out:
1092         lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1093         DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1094                       lvds_encoder->is_dual_link ? "dual" : "single");
1095
1096         /*
1097          * Unlock registers and just
1098          * leave them unlocked
1099          */
1100         if (HAS_PCH_SPLIT(dev)) {
1101                 I915_WRITE(PCH_PP_CONTROL,
1102                            I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1103         } else {
1104                 I915_WRITE(PP_CONTROL,
1105                            I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1106         }
1107         lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1108         if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1109                 DRM_DEBUG_KMS("lid notifier registration failed\n");
1110                 lvds_connector->lid_notifier.notifier_call = NULL;
1111         }
1112         drm_sysfs_connector_add(connector);
1113
1114         intel_panel_init(&intel_connector->panel, fixed_mode);
1115         intel_panel_setup_backlight(connector);
1116
1117         return;
1118
1119 failed:
1120         DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1121         drm_connector_cleanup(connector);
1122         drm_encoder_cleanup(encoder);
1123         if (fixed_mode)
1124                 drm_mode_destroy(dev, fixed_mode);
1125         kfree(lvds_encoder);
1126         kfree(lvds_connector);
1127         return;
1128 }