1 /* 2 * Copyright © 2006 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Authors: 24 * Eric Anholt <eric@anholt.net> 25 * 26 * $FreeBSD: src/sys/dev/drm2/i915/intel_bios.c,v 1.1 2012/05/22 11:07:44 kib Exp $ 27 */ 28 #include <drm/drmP.h> 29 #include <drm/drm_dp_helper.h> 30 #include <drm/i915_drm.h> 31 #include "i915_drv.h" 32 #include "intel_bios.h" 33 34 #define SLAVE_ADDR1 0x70 35 #define SLAVE_ADDR2 0x72 36 37 static int panel_type; 38 39 static void * 40 find_section(struct bdb_header *bdb, int section_id) 41 { 42 u8 *base = (u8 *)bdb; 43 int index = 0; 44 u16 total, current_size; 45 u8 current_id; 46 47 /* skip to first section */ 48 index += bdb->header_size; 49 total = bdb->bdb_size; 50 51 /* walk the sections looking for section_id */ 52 while (index < total) { 53 current_id = *(base + index); 54 index++; 55 current_size = *((u16 *)(base + index)); 56 index += 2; 57 if (current_id == section_id) 58 return base + index; 59 index += current_size; 60 } 61 62 return NULL; 63 } 64 65 static u16 66 get_blocksize(void *p) 67 { 68 u16 *block_ptr, block_size; 69 70 block_ptr = (u16 *)((char *)p - 2); 71 block_size = *block_ptr; 72 return block_size; 73 } 74 75 static void 76 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, 77 const struct lvds_dvo_timing *dvo_timing) 78 { 79 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | 80 dvo_timing->hactive_lo; 81 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + 82 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); 83 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + 84 dvo_timing->hsync_pulse_width; 85 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + 86 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); 87 88 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | 89 dvo_timing->vactive_lo; 90 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + 91 dvo_timing->vsync_off; 92 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + 93 dvo_timing->vsync_pulse_width; 94 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + 95 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); 96 panel_fixed_mode->clock = dvo_timing->clock * 10; 97 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; 98 99 if (dvo_timing->hsync_positive) 100 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; 101 else 102 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; 103 104 if (dvo_timing->vsync_positive) 105 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; 106 else 107 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; 108 109 /* Some VBTs have bogus h/vtotal values */ 110 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) 111 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; 112 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) 113 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; 114 115 drm_mode_set_name(panel_fixed_mode); 116 } 117 118 static bool 119 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a, 120 const struct lvds_dvo_timing *b) 121 { 122 if (a->hactive_hi != b->hactive_hi || 123 a->hactive_lo != b->hactive_lo) 124 return false; 125 126 if (a->hsync_off_hi != b->hsync_off_hi || 127 a->hsync_off_lo != b->hsync_off_lo) 128 return false; 129 130 if (a->hsync_pulse_width != b->hsync_pulse_width) 131 return false; 132 133 if (a->hblank_hi != b->hblank_hi || 134 a->hblank_lo != b->hblank_lo) 135 return false; 136 137 if (a->vactive_hi != b->vactive_hi || 138 a->vactive_lo != b->vactive_lo) 139 return false; 140 141 if (a->vsync_off != b->vsync_off) 142 return false; 143 144 if (a->vsync_pulse_width != b->vsync_pulse_width) 145 return false; 146 147 if (a->vblank_hi != b->vblank_hi || 148 a->vblank_lo != b->vblank_lo) 149 return false; 150 151 return true; 152 } 153 154 static const struct lvds_dvo_timing * 155 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data, 156 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs, 157 int index) 158 { 159 /* 160 * the size of fp_timing varies on the different platform. 161 * So calculate the DVO timing relative offset in LVDS data 162 * entry to get the DVO timing entry 163 */ 164 165 int lfp_data_size = 166 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - 167 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; 168 int dvo_timing_offset = 169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - 170 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; 171 const char *entry = (const char *)lvds_lfp_data->data + 172 lfp_data_size * index; 173 174 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset); 175 } 176 177 /* Try to find integrated panel data */ 178 static void 179 parse_lfp_panel_data(struct drm_i915_private *dev_priv, 180 struct bdb_header *bdb) 181 { 182 const struct bdb_lvds_options *lvds_options; 183 const struct bdb_lvds_lfp_data *lvds_lfp_data; 184 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; 185 const struct lvds_dvo_timing *panel_dvo_timing; 186 struct drm_display_mode *panel_fixed_mode; 187 int i, downclock; 188 189 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); 190 if (!lvds_options) 191 return; 192 193 dev_priv->lvds_dither = lvds_options->pixel_dither; 194 if (lvds_options->panel_type == 0xff) 195 return; 196 197 panel_type = lvds_options->panel_type; 198 199 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); 200 if (!lvds_lfp_data) 201 return; 202 203 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); 204 if (!lvds_lfp_data_ptrs) 205 return; 206 207 dev_priv->lvds_vbt = 1; 208 209 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 210 lvds_lfp_data_ptrs, 211 lvds_options->panel_type); 212 213 panel_fixed_mode = kmalloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, 214 M_WAITOK | M_ZERO); 215 216 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); 217 218 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; 219 220 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); 221 drm_mode_debug_printmodeline(panel_fixed_mode); 222 223 /* 224 * Iterate over the LVDS panel timing info to find the lowest clock 225 * for the native resolution. 226 */ 227 downclock = panel_dvo_timing->clock; 228 for (i = 0; i < 16; i++) { 229 const struct lvds_dvo_timing *dvo_timing; 230 231 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 232 lvds_lfp_data_ptrs, 233 i); 234 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && 235 dvo_timing->clock < downclock) 236 downclock = dvo_timing->clock; 237 } 238 239 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) { 240 dev_priv->lvds_downclock_avail = 1; 241 dev_priv->lvds_downclock = downclock * 10; 242 DRM_DEBUG("LVDS downclock is found in VBT. " 243 "Normal Clock %dKHz, downclock %dKHz\n", 244 panel_fixed_mode->clock, 10 * downclock); 245 } 246 } 247 248 /* Try to find sdvo panel data */ 249 static void 250 parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 251 struct bdb_header *bdb) 252 { 253 struct lvds_dvo_timing *dvo_timing; 254 struct drm_display_mode *panel_fixed_mode; 255 int index; 256 257 index = i915_vbt_sdvo_panel_type; 258 if (index == -1) { 259 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 260 261 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 262 if (!sdvo_lvds_options) 263 return; 264 265 index = sdvo_lvds_options->panel_type; 266 } 267 268 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 269 if (!dvo_timing) 270 return; 271 272 panel_fixed_mode = kmalloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, 273 M_WAITOK | M_ZERO); 274 275 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); 276 277 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; 278 279 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 280 drm_mode_debug_printmodeline(panel_fixed_mode); 281 } 282 283 static int intel_bios_ssc_frequency(struct drm_device *dev, 284 bool alternate) 285 { 286 switch (INTEL_INFO(dev)->gen) { 287 case 2: 288 return alternate ? 66 : 48; 289 case 3: 290 case 4: 291 return alternate ? 100 : 96; 292 default: 293 return alternate ? 100 : 120; 294 } 295 } 296 297 static void 298 parse_general_features(struct drm_i915_private *dev_priv, 299 struct bdb_header *bdb) 300 { 301 struct drm_device *dev = dev_priv->dev; 302 struct bdb_general_features *general; 303 304 general = find_section(bdb, BDB_GENERAL_FEATURES); 305 if (general) { 306 dev_priv->int_tv_support = general->int_tv_support; 307 dev_priv->int_crt_support = general->int_crt_support; 308 dev_priv->lvds_use_ssc = general->enable_ssc; 309 dev_priv->lvds_ssc_freq = 310 intel_bios_ssc_frequency(dev, general->ssc_freq); 311 dev_priv->display_clock_mode = general->display_clock_mode; 312 dev_priv->fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; 313 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n", 314 dev_priv->int_tv_support, 315 dev_priv->int_crt_support, 316 dev_priv->lvds_use_ssc, 317 dev_priv->lvds_ssc_freq, 318 dev_priv->display_clock_mode, 319 dev_priv->fdi_rx_polarity_inverted); 320 } 321 } 322 323 static void 324 parse_general_definitions(struct drm_i915_private *dev_priv, 325 struct bdb_header *bdb) 326 { 327 struct bdb_general_definitions *general; 328 329 general = find_section(bdb, BDB_GENERAL_DEFINITIONS); 330 if (general) { 331 u16 block_size = get_blocksize(general); 332 if (block_size >= sizeof(*general)) { 333 int bus_pin = general->crt_ddc_gmbus_pin; 334 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 335 if (bus_pin >= 1 && bus_pin <= 6) 336 dev_priv->crt_ddc_pin = bus_pin; 337 } else { 338 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", 339 block_size); 340 } 341 } 342 } 343 344 static void 345 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, 346 struct bdb_header *bdb) 347 { 348 struct sdvo_device_mapping *p_mapping; 349 struct bdb_general_definitions *p_defs; 350 struct child_device_config *p_child; 351 int i, child_device_num, count; 352 u16 block_size; 353 354 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 355 if (!p_defs) { 356 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 357 return; 358 } 359 /* judge whether the size of child device meets the requirements. 360 * If the child device size obtained from general definition block 361 * is different with sizeof(struct child_device_config), skip the 362 * parsing of sdvo device info 363 */ 364 if (p_defs->child_dev_size != sizeof(*p_child)) { 365 /* different child dev size . Ignore it */ 366 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 367 return; 368 } 369 /* get the block size of general definitions */ 370 block_size = get_blocksize(p_defs); 371 /* get the number of child device */ 372 child_device_num = (block_size - sizeof(*p_defs)) / 373 sizeof(*p_child); 374 count = 0; 375 for (i = 0; i < child_device_num; i++) { 376 p_child = &(p_defs->devices[i]); 377 if (!p_child->device_type) { 378 /* skip the device block if device type is invalid */ 379 continue; 380 } 381 if (p_child->slave_addr != SLAVE_ADDR1 && 382 p_child->slave_addr != SLAVE_ADDR2) { 383 /* 384 * If the slave address is neither 0x70 nor 0x72, 385 * it is not a SDVO device. Skip it. 386 */ 387 continue; 388 } 389 if (p_child->dvo_port != DEVICE_PORT_DVOB && 390 p_child->dvo_port != DEVICE_PORT_DVOC) { 391 /* skip the incorrect SDVO port */ 392 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 393 continue; 394 } 395 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 396 " %s port\n", 397 p_child->slave_addr, 398 (p_child->dvo_port == DEVICE_PORT_DVOB) ? 399 "SDVOB" : "SDVOC"); 400 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); 401 if (!p_mapping->initialized) { 402 p_mapping->dvo_port = p_child->dvo_port; 403 p_mapping->slave_addr = p_child->slave_addr; 404 p_mapping->dvo_wiring = p_child->dvo_wiring; 405 p_mapping->ddc_pin = p_child->ddc_pin; 406 p_mapping->i2c_pin = p_child->i2c_pin; 407 p_mapping->initialized = 1; 408 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 409 p_mapping->dvo_port, 410 p_mapping->slave_addr, 411 p_mapping->dvo_wiring, 412 p_mapping->ddc_pin, 413 p_mapping->i2c_pin); 414 } else { 415 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 416 "two SDVO device.\n"); 417 } 418 if (p_child->slave2_addr) { 419 /* Maybe this is a SDVO device with multiple inputs */ 420 /* And the mapping info is not added */ 421 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 422 " is a SDVO device with multiple inputs.\n"); 423 } 424 count++; 425 } 426 427 if (!count) { 428 /* No SDVO device info is found */ 429 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 430 } 431 return; 432 } 433 434 static void 435 parse_driver_features(struct drm_i915_private *dev_priv, 436 struct bdb_header *bdb) 437 { 438 struct drm_device *dev = dev_priv->dev; 439 struct bdb_driver_features *driver; 440 441 driver = find_section(bdb, BDB_DRIVER_FEATURES); 442 if (!driver) 443 return; 444 445 if (SUPPORTS_EDP(dev) && 446 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 447 dev_priv->edp.support = 1; 448 449 if (driver->dual_frequency) 450 dev_priv->render_reclock_avail = true; 451 } 452 453 static void 454 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 455 { 456 struct bdb_edp *edp; 457 struct edp_power_seq *edp_pps; 458 struct edp_link_params *edp_link_params; 459 460 edp = find_section(bdb, BDB_EDP); 461 if (!edp) { 462 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) { 463 DRM_DEBUG_KMS("No eDP BDB found but eDP panel " 464 "supported, assume %dbpp panel color " 465 "depth.\n", 466 dev_priv->edp.bpp); 467 } 468 return; 469 } 470 471 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 472 case EDP_18BPP: 473 dev_priv->edp.bpp = 18; 474 break; 475 case EDP_24BPP: 476 dev_priv->edp.bpp = 24; 477 break; 478 case EDP_30BPP: 479 dev_priv->edp.bpp = 30; 480 break; 481 } 482 483 /* Get the eDP sequencing and link info */ 484 edp_pps = &edp->power_seqs[panel_type]; 485 edp_link_params = &edp->link_params[panel_type]; 486 487 dev_priv->edp.pps = *edp_pps; 488 489 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 490 DP_LINK_BW_1_62; 491 switch (edp_link_params->lanes) { 492 case 0: 493 dev_priv->edp.lanes = 1; 494 break; 495 case 1: 496 dev_priv->edp.lanes = 2; 497 break; 498 case 3: 499 default: 500 dev_priv->edp.lanes = 4; 501 break; 502 } 503 switch (edp_link_params->preemphasis) { 504 case 0: 505 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0; 506 break; 507 case 1: 508 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; 509 break; 510 case 2: 511 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6; 512 break; 513 case 3: 514 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; 515 break; 516 } 517 switch (edp_link_params->vswing) { 518 case 0: 519 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400; 520 break; 521 case 1: 522 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600; 523 break; 524 case 2: 525 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800; 526 break; 527 case 3: 528 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200; 529 break; 530 } 531 } 532 533 static void 534 parse_device_mapping(struct drm_i915_private *dev_priv, 535 struct bdb_header *bdb) 536 { 537 struct bdb_general_definitions *p_defs; 538 struct child_device_config *p_child, *child_dev_ptr; 539 int i, child_device_num, count; 540 u16 block_size; 541 542 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 543 if (!p_defs) { 544 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 545 return; 546 } 547 /* judge whether the size of child device meets the requirements. 548 * If the child device size obtained from general definition block 549 * is different with sizeof(struct child_device_config), skip the 550 * parsing of sdvo device info 551 */ 552 if (p_defs->child_dev_size != sizeof(*p_child)) { 553 /* different child dev size . Ignore it */ 554 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 555 return; 556 } 557 /* get the block size of general definitions */ 558 block_size = get_blocksize(p_defs); 559 /* get the number of child device */ 560 child_device_num = (block_size - sizeof(*p_defs)) / 561 sizeof(*p_child); 562 count = 0; 563 /* get the number of child device that is present */ 564 for (i = 0; i < child_device_num; i++) { 565 p_child = &(p_defs->devices[i]); 566 if (!p_child->device_type) { 567 /* skip the device block if device type is invalid */ 568 continue; 569 } 570 count++; 571 } 572 if (!count) { 573 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 574 return; 575 } 576 dev_priv->child_dev = kmalloc(sizeof(*p_child) * count, DRM_MEM_KMS, 577 M_WAITOK | M_ZERO); 578 579 dev_priv->child_dev_num = count; 580 count = 0; 581 for (i = 0; i < child_device_num; i++) { 582 p_child = &(p_defs->devices[i]); 583 if (!p_child->device_type) { 584 /* skip the device block if device type is invalid */ 585 continue; 586 } 587 child_dev_ptr = dev_priv->child_dev + count; 588 count++; 589 memcpy((void *)child_dev_ptr, (void *)p_child, 590 sizeof(*p_child)); 591 } 592 return; 593 } 594 595 static void 596 init_vbt_defaults(struct drm_i915_private *dev_priv) 597 { 598 struct drm_device *dev = dev_priv->dev; 599 600 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC; 601 602 /* LFP panel data */ 603 dev_priv->lvds_dither = 1; 604 dev_priv->lvds_vbt = 0; 605 606 /* SDVO panel data */ 607 dev_priv->sdvo_lvds_vbt_mode = NULL; 608 609 /* general features */ 610 dev_priv->int_tv_support = 1; 611 dev_priv->int_crt_support = 1; 612 613 /* Default to using SSC */ 614 dev_priv->lvds_use_ssc = 1; 615 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1); 616 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq); 617 618 /* eDP data */ 619 dev_priv->edp.bpp = 18; 620 } 621 622 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 623 { 624 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 625 "VBIOS ROM for %s\n", 626 id->ident); 627 return 1; 628 } 629 630 static const struct dmi_system_id intel_no_opregion_vbt[] = { 631 { 632 .callback = intel_no_opregion_vbt_callback, 633 .ident = "ThinkCentre A57", 634 .matches = { 635 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 636 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 637 }, 638 }, 639 { } 640 }; 641 642 /** 643 * intel_parse_bios - find VBT and initialize settings from the BIOS 644 * @dev: DRM device 645 * 646 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers 647 * to appropriate values. 648 * 649 * Returns 0 on success, nonzero on failure. 650 */ 651 int 652 intel_parse_bios(struct drm_device *dev) 653 { 654 struct drm_i915_private *dev_priv = dev->dev_private; 655 struct bdb_header *bdb = NULL; 656 u8 *bios; 657 658 init_vbt_defaults(dev_priv); 659 660 /* XXX Should this validation be moved to intel_opregion.c? */ 661 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { 662 struct vbt_header *vbt = dev_priv->opregion.vbt; 663 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 664 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 665 vbt->signature); 666 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 667 } else 668 dev_priv->opregion.vbt = NULL; 669 } 670 bios = NULL; 671 672 #if 1 673 if (bdb == NULL) { 674 KIB_NOTYET(); 675 return (-1); 676 } 677 #else 678 if (bdb == NULL) { 679 struct vbt_header *vbt = NULL; 680 size_t size; 681 int i; 682 683 bios = pci_map_rom(pdev, &size); 684 if (!bios) 685 return -1; 686 687 /* Scour memory looking for the VBT signature */ 688 for (i = 0; i + 4 < size; i++) { 689 if (!memcmp(bios + i, "$VBT", 4)) { 690 vbt = (struct vbt_header *)(bios + i); 691 break; 692 } 693 } 694 695 if (!vbt) { 696 DRM_DEBUG_DRIVER("VBT signature missing\n"); 697 pci_unmap_rom(pdev, bios); 698 return -1; 699 } 700 701 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 702 } 703 #endif 704 705 /* Grab useful general definitions */ 706 parse_general_features(dev_priv, bdb); 707 parse_general_definitions(dev_priv, bdb); 708 parse_lfp_panel_data(dev_priv, bdb); 709 parse_sdvo_panel_data(dev_priv, bdb); 710 parse_sdvo_device_mapping(dev_priv, bdb); 711 parse_device_mapping(dev_priv, bdb); 712 parse_driver_features(dev_priv, bdb); 713 parse_edp(dev_priv, bdb); 714 715 #if 0 716 if (bios) 717 pci_unmap_rom(pdev, bios); 718 #endif 719 720 return 0; 721 } 722 723 /* Ensure that vital registers have been initialised, even if the BIOS 724 * is absent or just failing to do its job. 725 */ 726 void intel_setup_bios(struct drm_device *dev) 727 { 728 struct drm_i915_private *dev_priv = dev->dev_private; 729 730 /* Set the Panel Power On/Off timings if uninitialized. */ 731 if ((I915_READ(PP_ON_DELAYS) == 0) && (I915_READ(PP_OFF_DELAYS) == 0)) { 732 /* Set T2 to 40ms and T5 to 200ms */ 733 I915_WRITE(PP_ON_DELAYS, 0x019007d0); 734 735 /* Set T3 to 35ms and Tx to 200ms */ 736 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); 737 } 738 } 739