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