1 /* 2 * Copyright © 2006-2007 Intel Corporation 3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: 25 * Eric Anholt <eric@anholt.net> 26 * Dave Airlie <airlied@linux.ie> 27 * Jesse Barnes <jesse.barnes@intel.com> 28 */ 29 30 #include <linux/dmi.h> 31 #include <linux/i2c.h> 32 #include <drm/drmP.h> 33 #include <drm/drm_atomic_helper.h> 34 #include <drm/drm_crtc.h> 35 #include <drm/drm_edid.h> 36 #include "intel_drv.h" 37 #include <drm/i915_drm.h> 38 #include "i915_drv.h" 39 40 /* Private structure for the integrated LVDS support */ 41 struct intel_lvds_connector { 42 struct intel_connector base; 43 44 struct notifier_block lid_notifier; 45 }; 46 47 struct intel_lvds_encoder { 48 struct intel_encoder base; 49 50 bool is_dual_link; 51 u32 reg; 52 u32 a3_power; 53 54 struct intel_lvds_connector *attached_connector; 55 }; 56 57 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder) 58 { 59 return container_of(encoder, struct intel_lvds_encoder, base.base); 60 } 61 62 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector) 63 { 64 return container_of(connector, struct intel_lvds_connector, base.base); 65 } 66 67 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder, 68 enum i915_pipe *pipe) 69 { 70 struct drm_device *dev = encoder->base.dev; 71 struct drm_i915_private *dev_priv = dev->dev_private; 72 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base); 73 enum intel_display_power_domain power_domain; 74 u32 tmp; 75 76 power_domain = intel_display_port_power_domain(encoder); 77 if (!intel_display_power_is_enabled(dev_priv, power_domain)) 78 return false; 79 80 tmp = I915_READ(lvds_encoder->reg); 81 82 if (!(tmp & LVDS_PORT_EN)) 83 return false; 84 85 if (HAS_PCH_CPT(dev)) 86 *pipe = PORT_TO_PIPE_CPT(tmp); 87 else 88 *pipe = PORT_TO_PIPE(tmp); 89 90 return true; 91 } 92 93 static void intel_lvds_get_config(struct intel_encoder *encoder, 94 struct intel_crtc_state *pipe_config) 95 { 96 struct drm_device *dev = encoder->base.dev; 97 struct drm_i915_private *dev_priv = dev->dev_private; 98 u32 lvds_reg, tmp, flags = 0; 99 int dotclock; 100 101 if (HAS_PCH_SPLIT(dev)) 102 lvds_reg = PCH_LVDS; 103 else 104 lvds_reg = LVDS; 105 106 tmp = I915_READ(lvds_reg); 107 if (tmp & LVDS_HSYNC_POLARITY) 108 flags |= DRM_MODE_FLAG_NHSYNC; 109 else 110 flags |= DRM_MODE_FLAG_PHSYNC; 111 if (tmp & LVDS_VSYNC_POLARITY) 112 flags |= DRM_MODE_FLAG_NVSYNC; 113 else 114 flags |= DRM_MODE_FLAG_PVSYNC; 115 116 pipe_config->base.adjusted_mode.flags |= flags; 117 118 /* gen2/3 store dither state in pfit control, needs to match */ 119 if (INTEL_INFO(dev)->gen < 4) { 120 tmp = I915_READ(PFIT_CONTROL); 121 122 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE; 123 } 124 125 dotclock = pipe_config->port_clock; 126 127 if (HAS_PCH_SPLIT(dev_priv->dev)) 128 ironlake_check_encoder_dotclock(pipe_config, dotclock); 129 130 pipe_config->base.adjusted_mode.crtc_clock = dotclock; 131 } 132 133 static void intel_pre_enable_lvds(struct intel_encoder *encoder) 134 { 135 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base); 136 struct drm_device *dev = encoder->base.dev; 137 struct drm_i915_private *dev_priv = dev->dev_private; 138 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); 139 const struct drm_display_mode *adjusted_mode = 140 &crtc->config->base.adjusted_mode; 141 int pipe = crtc->pipe; 142 u32 temp; 143 144 if (HAS_PCH_SPLIT(dev)) { 145 assert_fdi_rx_pll_disabled(dev_priv, pipe); 146 assert_shared_dpll_disabled(dev_priv, 147 intel_crtc_to_shared_dpll(crtc)); 148 } else { 149 assert_pll_disabled(dev_priv, pipe); 150 } 151 152 temp = I915_READ(lvds_encoder->reg); 153 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP; 154 155 if (HAS_PCH_CPT(dev)) { 156 temp &= ~PORT_TRANS_SEL_MASK; 157 temp |= PORT_TRANS_SEL_CPT(pipe); 158 } else { 159 if (pipe == 1) { 160 temp |= LVDS_PIPEB_SELECT; 161 } else { 162 temp &= ~LVDS_PIPEB_SELECT; 163 } 164 } 165 166 /* set the corresponsding LVDS_BORDER bit */ 167 temp &= ~LVDS_BORDER_ENABLE; 168 temp |= crtc->config->gmch_pfit.lvds_border_bits; 169 /* Set the B0-B3 data pairs corresponding to whether we're going to 170 * set the DPLLs for dual-channel mode or not. 171 */ 172 if (lvds_encoder->is_dual_link) 173 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP; 174 else 175 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP); 176 177 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP) 178 * appropriately here, but we need to look more thoroughly into how 179 * panels behave in the two modes. For now, let's just maintain the 180 * value we got from the BIOS. 181 */ 182 temp &= ~LVDS_A3_POWER_MASK; 183 temp |= lvds_encoder->a3_power; 184 185 /* Set the dithering flag on LVDS as needed, note that there is no 186 * special lvds dither control bit on pch-split platforms, dithering is 187 * only controlled through the PIPECONF reg. */ 188 if (INTEL_INFO(dev)->gen == 4) { 189 /* Bspec wording suggests that LVDS port dithering only exists 190 * for 18bpp panels. */ 191 if (crtc->config->dither && crtc->config->pipe_bpp == 18) 192 temp |= LVDS_ENABLE_DITHER; 193 else 194 temp &= ~LVDS_ENABLE_DITHER; 195 } 196 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY); 197 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) 198 temp |= LVDS_HSYNC_POLARITY; 199 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) 200 temp |= LVDS_VSYNC_POLARITY; 201 202 I915_WRITE(lvds_encoder->reg, temp); 203 } 204 205 /** 206 * Sets the power state for the panel. 207 */ 208 static void intel_enable_lvds(struct intel_encoder *encoder) 209 { 210 struct drm_device *dev = encoder->base.dev; 211 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base); 212 struct intel_connector *intel_connector = 213 &lvds_encoder->attached_connector->base; 214 struct drm_i915_private *dev_priv = dev->dev_private; 215 u32 ctl_reg, stat_reg; 216 217 if (HAS_PCH_SPLIT(dev)) { 218 ctl_reg = PCH_PP_CONTROL; 219 stat_reg = PCH_PP_STATUS; 220 } else { 221 ctl_reg = PP_CONTROL; 222 stat_reg = PP_STATUS; 223 } 224 225 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN); 226 227 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON); 228 POSTING_READ(lvds_encoder->reg); 229 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000)) 230 DRM_ERROR("timed out waiting for panel to power on\n"); 231 232 intel_panel_enable_backlight(intel_connector); 233 } 234 235 static void intel_disable_lvds(struct intel_encoder *encoder) 236 { 237 struct drm_device *dev = encoder->base.dev; 238 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base); 239 struct intel_connector *intel_connector = 240 &lvds_encoder->attached_connector->base; 241 struct drm_i915_private *dev_priv = dev->dev_private; 242 u32 ctl_reg, stat_reg; 243 244 if (HAS_PCH_SPLIT(dev)) { 245 ctl_reg = PCH_PP_CONTROL; 246 stat_reg = PCH_PP_STATUS; 247 } else { 248 ctl_reg = PP_CONTROL; 249 stat_reg = PP_STATUS; 250 } 251 252 intel_panel_disable_backlight(intel_connector); 253 254 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON); 255 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000)) 256 DRM_ERROR("timed out waiting for panel to power off\n"); 257 258 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN); 259 POSTING_READ(lvds_encoder->reg); 260 } 261 262 static enum drm_mode_status 263 intel_lvds_mode_valid(struct drm_connector *connector, 264 struct drm_display_mode *mode) 265 { 266 struct intel_connector *intel_connector = to_intel_connector(connector); 267 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; 268 269 if (mode->hdisplay > fixed_mode->hdisplay) 270 return MODE_PANEL; 271 if (mode->vdisplay > fixed_mode->vdisplay) 272 return MODE_PANEL; 273 274 return MODE_OK; 275 } 276 277 static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, 278 struct intel_crtc_state *pipe_config) 279 { 280 struct drm_device *dev = intel_encoder->base.dev; 281 struct intel_lvds_encoder *lvds_encoder = 282 to_lvds_encoder(&intel_encoder->base); 283 struct intel_connector *intel_connector = 284 &lvds_encoder->attached_connector->base; 285 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; 286 struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc; 287 unsigned int lvds_bpp; 288 289 /* Should never happen!! */ 290 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) { 291 DRM_ERROR("Can't support LVDS on pipe A\n"); 292 return false; 293 } 294 295 if (lvds_encoder->a3_power == LVDS_A3_POWER_UP) 296 lvds_bpp = 8*3; 297 else 298 lvds_bpp = 6*3; 299 300 if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) { 301 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n", 302 pipe_config->pipe_bpp, lvds_bpp); 303 pipe_config->pipe_bpp = lvds_bpp; 304 } 305 306 /* 307 * We have timings from the BIOS for the panel, put them in 308 * to the adjusted mode. The CRTC will be set up for this mode, 309 * with the panel scaling set up to source from the H/VDisplay 310 * of the original mode. 311 */ 312 intel_fixed_panel_mode(intel_connector->panel.fixed_mode, 313 adjusted_mode); 314 315 if (HAS_PCH_SPLIT(dev)) { 316 pipe_config->has_pch_encoder = true; 317 318 intel_pch_panel_fitting(intel_crtc, pipe_config, 319 intel_connector->panel.fitting_mode); 320 } else { 321 intel_gmch_panel_fitting(intel_crtc, pipe_config, 322 intel_connector->panel.fitting_mode); 323 324 } 325 326 /* 327 * XXX: It would be nice to support lower refresh rates on the 328 * panels to reduce power consumption, and perhaps match the 329 * user's requested refresh rate. 330 */ 331 332 return true; 333 } 334 335 /** 336 * Detect the LVDS connection. 337 * 338 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means 339 * connected and closed means disconnected. We also send hotplug events as 340 * needed, using lid status notification from the input layer. 341 */ 342 static enum drm_connector_status 343 intel_lvds_detect(struct drm_connector *connector, bool force) 344 { 345 struct drm_device *dev = connector->dev; 346 enum drm_connector_status status; 347 348 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 349 connector->base.id, connector->name); 350 351 status = intel_panel_detect(dev); 352 if (status != connector_status_unknown) 353 return status; 354 355 return connector_status_connected; 356 } 357 358 /** 359 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 360 */ 361 static int intel_lvds_get_modes(struct drm_connector *connector) 362 { 363 struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector); 364 struct drm_device *dev = connector->dev; 365 struct drm_display_mode *mode; 366 367 /* use cached edid if we have one */ 368 if (!IS_ERR_OR_NULL(lvds_connector->base.edid)) 369 return drm_add_edid_modes(connector, lvds_connector->base.edid); 370 371 mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode); 372 if (mode == NULL) 373 return 0; 374 375 drm_mode_probed_add(connector, mode); 376 return 1; 377 } 378 379 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id) 380 { 381 DRM_INFO("Skipping forced modeset for %s\n", id->ident); 382 return 1; 383 } 384 385 /* The GPU hangs up on these systems if modeset is performed on LID open */ 386 static const struct dmi_system_id intel_no_modeset_on_lid[] = { 387 { 388 .callback = intel_no_modeset_on_lid_dmi_callback, 389 .ident = "Toshiba Tecra A11", 390 .matches = { 391 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 392 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"), 393 }, 394 }, 395 396 { } /* terminating entry */ 397 }; 398 399 #if 0 400 /* 401 * Lid events. Note the use of 'modeset': 402 * - we set it to MODESET_ON_LID_OPEN on lid close, 403 * and set it to MODESET_DONE on open 404 * - we use it as a "only once" bit (ie we ignore 405 * duplicate events where it was already properly set) 406 * - the suspend/resume paths will set it to 407 * MODESET_SUSPENDED and ignore the lid open event, 408 * because they restore the mode ("lid open"). 409 */ 410 static int intel_lid_notify(struct notifier_block *nb, unsigned long val, 411 void *unused) 412 { 413 struct intel_lvds_connector *lvds_connector = 414 container_of(nb, struct intel_lvds_connector, lid_notifier); 415 struct drm_connector *connector = &lvds_connector->base.base; 416 struct drm_device *dev = connector->dev; 417 struct drm_i915_private *dev_priv = dev->dev_private; 418 419 if (dev->switch_power_state != DRM_SWITCH_POWER_ON) 420 return NOTIFY_OK; 421 422 mutex_lock(&dev_priv->modeset_restore_lock); 423 if (dev_priv->modeset_restore == MODESET_SUSPENDED) 424 goto exit; 425 /* 426 * check and update the status of LVDS connector after receiving 427 * the LID nofication event. 428 */ 429 connector->status = connector->funcs->detect(connector, false); 430 431 /* Don't force modeset on machines where it causes a GPU lockup */ 432 if (dmi_check_system(intel_no_modeset_on_lid)) 433 goto exit; 434 if (!acpi_lid_open()) { 435 /* do modeset on next lid open event */ 436 dev_priv->modeset_restore = MODESET_ON_LID_OPEN; 437 goto exit; 438 } 439 440 if (dev_priv->modeset_restore == MODESET_DONE) 441 goto exit; 442 443 /* 444 * Some old platform's BIOS love to wreak havoc while the lid is closed. 445 * We try to detect this here and undo any damage. The split for PCH 446 * platforms is rather conservative and a bit arbitrary expect that on 447 * those platforms VGA disabling requires actual legacy VGA I/O access, 448 * and as part of the cleanup in the hw state restore we also redisable 449 * the vga plane. 450 */ 451 if (!HAS_PCH_SPLIT(dev)) { 452 drm_modeset_lock_all(dev); 453 intel_modeset_setup_hw_state(dev, true); 454 drm_modeset_unlock_all(dev); 455 } 456 457 dev_priv->modeset_restore = MODESET_DONE; 458 459 exit: 460 mutex_unlock(&dev_priv->modeset_restore_lock); 461 return NOTIFY_OK; 462 } 463 #endif 464 465 /** 466 * intel_lvds_destroy - unregister and free LVDS structures 467 * @connector: connector to free 468 * 469 * Unregister the DDC bus for this connector then free the driver private 470 * structure. 471 */ 472 static void intel_lvds_destroy(struct drm_connector *connector) 473 { 474 struct intel_lvds_connector *lvds_connector = 475 to_lvds_connector(connector); 476 477 #if 0 478 if (lvds_connector->lid_notifier.notifier_call) 479 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier); 480 #endif 481 482 if (!IS_ERR_OR_NULL(lvds_connector->base.edid)) 483 kfree(lvds_connector->base.edid); 484 485 intel_panel_fini(&lvds_connector->base.panel); 486 487 drm_connector_cleanup(connector); 488 kfree(connector); 489 } 490 491 static int intel_lvds_set_property(struct drm_connector *connector, 492 struct drm_property *property, 493 uint64_t value) 494 { 495 struct intel_connector *intel_connector = to_intel_connector(connector); 496 struct drm_device *dev = connector->dev; 497 498 if (property == dev->mode_config.scaling_mode_property) { 499 struct drm_crtc *crtc; 500 501 if (value == DRM_MODE_SCALE_NONE) { 502 DRM_DEBUG_KMS("no scaling not supported\n"); 503 return -EINVAL; 504 } 505 506 if (intel_connector->panel.fitting_mode == value) { 507 /* the LVDS scaling property is not changed */ 508 return 0; 509 } 510 intel_connector->panel.fitting_mode = value; 511 512 crtc = intel_attached_encoder(connector)->base.crtc; 513 if (crtc && crtc->enabled) { 514 /* 515 * If the CRTC is enabled, the display will be changed 516 * according to the new panel fitting mode. 517 */ 518 intel_crtc_restore_mode(crtc); 519 } 520 } 521 522 return 0; 523 } 524 525 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = { 526 .get_modes = intel_lvds_get_modes, 527 .mode_valid = intel_lvds_mode_valid, 528 .best_encoder = intel_best_encoder, 529 }; 530 531 static const struct drm_connector_funcs intel_lvds_connector_funcs = { 532 .dpms = intel_connector_dpms, 533 .detect = intel_lvds_detect, 534 .fill_modes = drm_helper_probe_single_connector_modes, 535 .set_property = intel_lvds_set_property, 536 .atomic_get_property = intel_connector_atomic_get_property, 537 .destroy = intel_lvds_destroy, 538 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 539 }; 540 541 static const struct drm_encoder_funcs intel_lvds_enc_funcs = { 542 .destroy = intel_encoder_destroy, 543 }; 544 545 static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id) 546 { 547 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident); 548 return 1; 549 } 550 551 /* These systems claim to have LVDS, but really don't */ 552 static const struct dmi_system_id intel_no_lvds[] = { 553 { 554 .callback = intel_no_lvds_dmi_callback, 555 .ident = "Apple Mac Mini (Core series)", 556 .matches = { 557 DMI_MATCH(DMI_SYS_VENDOR, "Apple"), 558 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"), 559 }, 560 }, 561 { 562 .callback = intel_no_lvds_dmi_callback, 563 .ident = "Apple Mac Mini (Core 2 series)", 564 .matches = { 565 DMI_MATCH(DMI_SYS_VENDOR, "Apple"), 566 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"), 567 }, 568 }, 569 { 570 .callback = intel_no_lvds_dmi_callback, 571 .ident = "MSI IM-945GSE-A", 572 .matches = { 573 DMI_MATCH(DMI_SYS_VENDOR, "MSI"), 574 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"), 575 }, 576 }, 577 { 578 .callback = intel_no_lvds_dmi_callback, 579 .ident = "Dell Studio Hybrid", 580 .matches = { 581 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 582 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"), 583 }, 584 }, 585 { 586 .callback = intel_no_lvds_dmi_callback, 587 .ident = "Dell OptiPlex FX170", 588 .matches = { 589 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 590 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"), 591 }, 592 }, 593 { 594 .callback = intel_no_lvds_dmi_callback, 595 .ident = "AOpen Mini PC", 596 .matches = { 597 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"), 598 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"), 599 }, 600 }, 601 { 602 .callback = intel_no_lvds_dmi_callback, 603 .ident = "AOpen Mini PC MP915", 604 .matches = { 605 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 606 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"), 607 }, 608 }, 609 { 610 .callback = intel_no_lvds_dmi_callback, 611 .ident = "AOpen i915GMm-HFS", 612 .matches = { 613 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 614 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 615 }, 616 }, 617 { 618 .callback = intel_no_lvds_dmi_callback, 619 .ident = "AOpen i45GMx-I", 620 .matches = { 621 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 622 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"), 623 }, 624 }, 625 { 626 .callback = intel_no_lvds_dmi_callback, 627 .ident = "Aopen i945GTt-VFA", 628 .matches = { 629 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"), 630 }, 631 }, 632 { 633 .callback = intel_no_lvds_dmi_callback, 634 .ident = "Clientron U800", 635 .matches = { 636 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"), 637 DMI_MATCH(DMI_PRODUCT_NAME, "U800"), 638 }, 639 }, 640 { 641 .callback = intel_no_lvds_dmi_callback, 642 .ident = "Clientron E830", 643 .matches = { 644 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"), 645 DMI_MATCH(DMI_PRODUCT_NAME, "E830"), 646 }, 647 }, 648 { 649 .callback = intel_no_lvds_dmi_callback, 650 .ident = "Asus EeeBox PC EB1007", 651 .matches = { 652 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."), 653 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"), 654 }, 655 }, 656 { 657 .callback = intel_no_lvds_dmi_callback, 658 .ident = "Asus AT5NM10T-I", 659 .matches = { 660 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 661 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"), 662 }, 663 }, 664 { 665 .callback = intel_no_lvds_dmi_callback, 666 .ident = "Hewlett-Packard HP t5740", 667 .matches = { 668 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 669 DMI_MATCH(DMI_PRODUCT_NAME, " t5740"), 670 }, 671 }, 672 { 673 .callback = intel_no_lvds_dmi_callback, 674 .ident = "Hewlett-Packard t5745", 675 .matches = { 676 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 677 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"), 678 }, 679 }, 680 { 681 .callback = intel_no_lvds_dmi_callback, 682 .ident = "Hewlett-Packard st5747", 683 .matches = { 684 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 685 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"), 686 }, 687 }, 688 { 689 .callback = intel_no_lvds_dmi_callback, 690 .ident = "MSI Wind Box DC500", 691 .matches = { 692 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"), 693 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"), 694 }, 695 }, 696 { 697 .callback = intel_no_lvds_dmi_callback, 698 .ident = "Gigabyte GA-D525TUD", 699 .matches = { 700 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), 701 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"), 702 }, 703 }, 704 { 705 .callback = intel_no_lvds_dmi_callback, 706 .ident = "Supermicro X7SPA-H", 707 .matches = { 708 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), 709 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"), 710 }, 711 }, 712 { 713 .callback = intel_no_lvds_dmi_callback, 714 .ident = "Fujitsu Esprimo Q900", 715 .matches = { 716 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 717 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"), 718 }, 719 }, 720 { 721 .callback = intel_no_lvds_dmi_callback, 722 .ident = "Intel D410PT", 723 .matches = { 724 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"), 725 DMI_MATCH(DMI_BOARD_NAME, "D410PT"), 726 }, 727 }, 728 { 729 .callback = intel_no_lvds_dmi_callback, 730 .ident = "Intel D425KT", 731 .matches = { 732 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"), 733 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"), 734 }, 735 }, 736 { 737 .callback = intel_no_lvds_dmi_callback, 738 .ident = "Intel D510MO", 739 .matches = { 740 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"), 741 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"), 742 }, 743 }, 744 { 745 .callback = intel_no_lvds_dmi_callback, 746 .ident = "Intel D525MW", 747 .matches = { 748 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"), 749 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"), 750 }, 751 }, 752 753 { } /* terminating entry */ 754 }; 755 756 /* 757 * Enumerate the child dev array parsed from VBT to check whether 758 * the LVDS is present. 759 * If it is present, return 1. 760 * If it is not present, return false. 761 * If no child dev is parsed from VBT, it assumes that the LVDS is present. 762 */ 763 static bool lvds_is_present_in_vbt(struct drm_device *dev, 764 u8 *i2c_pin) 765 { 766 struct drm_i915_private *dev_priv = dev->dev_private; 767 int i; 768 769 if (!dev_priv->vbt.child_dev_num) 770 return true; 771 772 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 773 union child_device_config *uchild = dev_priv->vbt.child_dev + i; 774 struct old_child_dev_config *child = &uchild->old; 775 776 /* If the device type is not LFP, continue. 777 * We have to check both the new identifiers as well as the 778 * old for compatibility with some BIOSes. 779 */ 780 if (child->device_type != DEVICE_TYPE_INT_LFP && 781 child->device_type != DEVICE_TYPE_LFP) 782 continue; 783 784 if (intel_gmbus_is_port_valid(child->i2c_pin)) 785 *i2c_pin = child->i2c_pin; 786 787 /* However, we cannot trust the BIOS writers to populate 788 * the VBT correctly. Since LVDS requires additional 789 * information from AIM blocks, a non-zero addin offset is 790 * a good indicator that the LVDS is actually present. 791 */ 792 if (child->addin_offset) 793 return true; 794 795 /* But even then some BIOS writers perform some black magic 796 * and instantiate the device without reference to any 797 * additional data. Trust that if the VBT was written into 798 * the OpRegion then they have validated the LVDS's existence. 799 */ 800 if (dev_priv->opregion.vbt) 801 return true; 802 } 803 804 return false; 805 } 806 807 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id) 808 { 809 DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident); 810 return 1; 811 } 812 813 static const struct dmi_system_id intel_dual_link_lvds[] = { 814 { 815 .callback = intel_dual_link_lvds_callback, 816 .ident = "Apple MacBook Pro (Core i5/i7 Series)", 817 .matches = { 818 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 819 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"), 820 }, 821 }, 822 { } /* terminating entry */ 823 }; 824 825 bool intel_is_dual_link_lvds(struct drm_device *dev) 826 { 827 struct intel_encoder *encoder; 828 struct intel_lvds_encoder *lvds_encoder; 829 830 for_each_intel_encoder(dev, encoder) { 831 if (encoder->type == INTEL_OUTPUT_LVDS) { 832 lvds_encoder = to_lvds_encoder(&encoder->base); 833 834 return lvds_encoder->is_dual_link; 835 } 836 } 837 838 return false; 839 } 840 841 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder) 842 { 843 struct drm_device *dev = lvds_encoder->base.base.dev; 844 unsigned int val; 845 struct drm_i915_private *dev_priv = dev->dev_private; 846 847 /* use the module option value if specified */ 848 if (i915.lvds_channel_mode > 0) 849 return i915.lvds_channel_mode == 2; 850 851 if (dmi_check_system(intel_dual_link_lvds)) 852 return true; 853 854 /* BIOS should set the proper LVDS register value at boot, but 855 * in reality, it doesn't set the value when the lid is closed; 856 * we need to check "the value to be set" in VBT when LVDS 857 * register is uninitialized. 858 */ 859 val = I915_READ(lvds_encoder->reg); 860 if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED))) 861 val = dev_priv->vbt.bios_lvds_val; 862 863 return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP; 864 } 865 866 static bool intel_lvds_supported(struct drm_device *dev) 867 { 868 /* With the introduction of the PCH we gained a dedicated 869 * LVDS presence pin, use it. */ 870 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 871 return true; 872 873 /* Otherwise LVDS was only attached to mobile products, 874 * except for the inglorious 830gm */ 875 if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 876 return true; 877 878 return false; 879 } 880 881 /** 882 * intel_lvds_init - setup LVDS connectors on this device 883 * @dev: drm device 884 * 885 * Create the connector, register the LVDS DDC bus, and try to figure out what 886 * modes we can display on the LVDS panel (if present). 887 */ 888 void intel_lvds_init(struct drm_device *dev) 889 { 890 struct drm_i915_private *dev_priv = dev->dev_private; 891 struct intel_lvds_encoder *lvds_encoder; 892 struct intel_encoder *intel_encoder; 893 struct intel_lvds_connector *lvds_connector; 894 struct intel_connector *intel_connector; 895 struct drm_connector *connector; 896 struct drm_encoder *encoder; 897 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 898 struct drm_display_mode *fixed_mode = NULL; 899 struct drm_display_mode *downclock_mode = NULL; 900 struct edid *edid; 901 struct drm_crtc *crtc; 902 u32 lvds; 903 int pipe; 904 u8 pin; 905 906 /* 907 * Unlock registers and just leave them unlocked. Do this before 908 * checking quirk lists to avoid bogus WARNINGs. 909 */ 910 if (HAS_PCH_SPLIT(dev)) { 911 I915_WRITE(PCH_PP_CONTROL, 912 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS); 913 } else { 914 I915_WRITE(PP_CONTROL, 915 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS); 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(*lvds_encoder), GFP_KERNEL); 940 if (!lvds_encoder) 941 return; 942 943 lvds_connector = kzalloc(sizeof(*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_enable = intel_pre_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 intel_connector->unregister = intel_connector_unregister; 969 970 intel_connector_attach_encoder(intel_connector, intel_encoder); 971 intel_encoder->type = INTEL_OUTPUT_LVDS; 972 973 intel_encoder->cloneable = 0; 974 if (HAS_PCH_SPLIT(dev)) 975 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); 976 else if (IS_GEN4(dev)) 977 intel_encoder->crtc_mask = (1 << 0) | (1 << 1); 978 else 979 intel_encoder->crtc_mask = (1 << 1); 980 981 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 mutex_lock(&dev->mode_config.mutex); 1013 edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin)); 1014 if (edid) { 1015 if (drm_add_edid_modes(connector, edid)) { 1016 drm_mode_connector_update_edid_property(connector, 1017 edid); 1018 } else { 1019 kfree(edid); 1020 edid = ERR_PTR(-EINVAL); 1021 } 1022 } else { 1023 edid = ERR_PTR(-ENOENT); 1024 } 1025 lvds_connector->base.edid = edid; 1026 1027 if (IS_ERR_OR_NULL(edid)) { 1028 /* Didn't get an EDID, so 1029 * Set wide sync ranges so we get all modes 1030 * handed to valid_mode for checking 1031 */ 1032 connector->display_info.min_vfreq = 0; 1033 connector->display_info.max_vfreq = 200; 1034 connector->display_info.min_hfreq = 0; 1035 connector->display_info.max_hfreq = 200; 1036 } 1037 1038 list_for_each_entry(scan, &connector->probed_modes, head) { 1039 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 1040 DRM_DEBUG_KMS("using preferred mode from EDID: "); 1041 drm_mode_debug_printmodeline(scan); 1042 1043 fixed_mode = drm_mode_duplicate(dev, scan); 1044 if (fixed_mode) { 1045 downclock_mode = 1046 intel_find_panel_downclock(dev, 1047 fixed_mode, connector); 1048 if (downclock_mode != NULL && 1049 i915.lvds_downclock) { 1050 /* We found the downclock for LVDS. */ 1051 dev_priv->lvds_downclock_avail = true; 1052 dev_priv->lvds_downclock = 1053 downclock_mode->clock; 1054 DRM_DEBUG_KMS("LVDS downclock is found" 1055 " in EDID. Normal clock %dKhz, " 1056 "downclock %dKhz\n", 1057 fixed_mode->clock, 1058 dev_priv->lvds_downclock); 1059 } 1060 goto out; 1061 } 1062 } 1063 } 1064 1065 /* Failed to get EDID, what about VBT? */ 1066 if (dev_priv->vbt.lfp_lvds_vbt_mode) { 1067 DRM_DEBUG_KMS("using mode from VBT: "); 1068 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode); 1069 1070 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode); 1071 if (fixed_mode) { 1072 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; 1073 goto out; 1074 } 1075 } 1076 1077 /* 1078 * If we didn't get EDID, try checking if the panel is already turned 1079 * on. If so, assume that whatever is currently programmed is the 1080 * correct mode. 1081 */ 1082 1083 /* Ironlake: FIXME if still fail, not try pipe mode now */ 1084 if (HAS_PCH_SPLIT(dev)) 1085 goto failed; 1086 1087 lvds = I915_READ(LVDS); 1088 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 1089 crtc = intel_get_crtc_for_pipe(dev, pipe); 1090 1091 if (crtc && (lvds & LVDS_PORT_EN)) { 1092 fixed_mode = intel_crtc_mode_get(dev, crtc); 1093 if (fixed_mode) { 1094 DRM_DEBUG_KMS("using current (BIOS) mode: "); 1095 drm_mode_debug_printmodeline(fixed_mode); 1096 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; 1097 goto out; 1098 } 1099 } 1100 1101 /* If we still don't have a mode after all that, give up. */ 1102 if (!fixed_mode) 1103 goto failed; 1104 1105 out: 1106 mutex_unlock(&dev->mode_config.mutex); 1107 1108 lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder); 1109 DRM_DEBUG_KMS("detected %s-link lvds configuration\n", 1110 lvds_encoder->is_dual_link ? "dual" : "single"); 1111 1112 lvds_encoder->a3_power = I915_READ(lvds_encoder->reg) & 1113 LVDS_A3_POWER_MASK; 1114 1115 #if 0 1116 lvds_connector->lid_notifier.notifier_call = intel_lid_notify; 1117 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) { 1118 DRM_DEBUG_KMS("lid notifier registration failed\n"); 1119 lvds_connector->lid_notifier.notifier_call = NULL; 1120 } 1121 drm_connector_register(connector); 1122 #endif 1123 1124 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode); 1125 intel_panel_setup_backlight(connector, INVALID_PIPE); 1126 1127 return; 1128 1129 failed: 1130 mutex_unlock(&dev->mode_config.mutex); 1131 1132 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n"); 1133 drm_connector_cleanup(connector); 1134 drm_encoder_cleanup(encoder); 1135 kfree(lvds_encoder); 1136 kfree(lvds_connector); 1137 return; 1138 } 1139