intel_bios.c revision 280369
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: stable/10/sys/dev/drm2/i915/intel_bios.c 280369 2015-03-23 13:38:33Z kib $ 27 */ 28#include <dev/drm2/drmP.h> 29#include <dev/drm2/drm.h> 30#include <dev/drm2/drm_dp_helper.h> 31#include <dev/drm2/i915/i915_drm.h> 32#include <dev/drm2/i915/i915_drv.h> 33#include <dev/drm2/i915/intel_bios.h> 34 35#define SLAVE_ADDR1 0x70 36#define SLAVE_ADDR2 0x72 37 38static int panel_type; 39 40static void * 41find_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 66static u16 67get_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 76static void 77fill_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 119static bool 120lvds_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 155static const struct lvds_dvo_timing * 156get_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/* get lvds_fp_timing entry 179 * this function may return NULL if the corresponding entry is invalid 180 */ 181static const struct lvds_fp_timing * 182get_lvds_fp_timing(const struct bdb_header *bdb, 183 const struct bdb_lvds_lfp_data *data, 184 const struct bdb_lvds_lfp_data_ptrs *ptrs, 185 int index) 186{ 187 size_t data_ofs = (const u8 *)data - (const u8 *)bdb; 188 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */ 189 size_t ofs; 190 191 if (index >= DRM_ARRAY_SIZE(ptrs->ptr)) 192 return NULL; 193 ofs = ptrs->ptr[index].fp_timing_offset; 194 if (ofs < data_ofs || 195 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size) 196 return NULL; 197 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs); 198} 199 200/* Try to find integrated panel data */ 201static void 202parse_lfp_panel_data(struct drm_i915_private *dev_priv, 203 struct bdb_header *bdb) 204{ 205 const struct bdb_lvds_options *lvds_options; 206 const struct bdb_lvds_lfp_data *lvds_lfp_data; 207 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; 208 const struct lvds_dvo_timing *panel_dvo_timing; 209 const struct lvds_fp_timing *fp_timing; 210 struct drm_display_mode *panel_fixed_mode; 211 int i, downclock; 212 213 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); 214 if (!lvds_options) 215 return; 216 217 dev_priv->lvds_dither = lvds_options->pixel_dither; 218 if (lvds_options->panel_type == 0xff) 219 return; 220 221 panel_type = lvds_options->panel_type; 222 223 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); 224 if (!lvds_lfp_data) 225 return; 226 227 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); 228 if (!lvds_lfp_data_ptrs) 229 return; 230 231 dev_priv->lvds_vbt = 1; 232 233 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 234 lvds_lfp_data_ptrs, 235 lvds_options->panel_type); 236 237 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, 238 M_WAITOK | M_ZERO); 239 240 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); 241 242 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; 243 244 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); 245 drm_mode_debug_printmodeline(panel_fixed_mode); 246 247 /* 248 * Iterate over the LVDS panel timing info to find the lowest clock 249 * for the native resolution. 250 */ 251 downclock = panel_dvo_timing->clock; 252 for (i = 0; i < 16; i++) { 253 const struct lvds_dvo_timing *dvo_timing; 254 255 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 256 lvds_lfp_data_ptrs, 257 i); 258 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && 259 dvo_timing->clock < downclock) 260 downclock = dvo_timing->clock; 261 } 262 263 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) { 264 dev_priv->lvds_downclock_avail = 1; 265 dev_priv->lvds_downclock = downclock * 10; 266 DRM_DEBUG("LVDS downclock is found in VBT. " 267 "Normal Clock %dKHz, downclock %dKHz\n", 268 panel_fixed_mode->clock, 10 * downclock); 269 } 270 271 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, 272 lvds_lfp_data_ptrs, 273 lvds_options->panel_type); 274 if (fp_timing) { 275 /* check the resolution, just to be sure */ 276 if (fp_timing->x_res == panel_fixed_mode->hdisplay && 277 fp_timing->y_res == panel_fixed_mode->vdisplay) { 278 dev_priv->bios_lvds_val = fp_timing->lvds_reg_val; 279 DRM_DEBUG_KMS("VBT initial LVDS value %x\n", 280 dev_priv->bios_lvds_val); 281 } 282 } 283} 284 285/* Try to find sdvo panel data */ 286static void 287parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 288 struct bdb_header *bdb) 289{ 290 struct lvds_dvo_timing *dvo_timing; 291 struct drm_display_mode *panel_fixed_mode; 292 int index; 293 294 index = i915_vbt_sdvo_panel_type; 295 if (index == -2) { 296 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); 297 return; 298 } 299 300 if (index == -1) { 301 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 302 303 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 304 if (!sdvo_lvds_options) 305 return; 306 307 index = sdvo_lvds_options->panel_type; 308 } 309 310 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 311 if (!dvo_timing) 312 return; 313 314 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, 315 M_WAITOK | M_ZERO); 316 317 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); 318 319 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; 320 321 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 322 drm_mode_debug_printmodeline(panel_fixed_mode); 323} 324 325static int intel_bios_ssc_frequency(struct drm_device *dev, 326 bool alternate) 327{ 328 switch (INTEL_INFO(dev)->gen) { 329 case 2: 330 return alternate ? 66 : 48; 331 case 3: 332 case 4: 333 return alternate ? 100 : 96; 334 default: 335 return alternate ? 100 : 120; 336 } 337} 338 339static void 340parse_general_features(struct drm_i915_private *dev_priv, 341 struct bdb_header *bdb) 342{ 343 struct drm_device *dev = dev_priv->dev; 344 struct bdb_general_features *general; 345 346 general = find_section(bdb, BDB_GENERAL_FEATURES); 347 if (general) { 348 dev_priv->int_tv_support = general->int_tv_support; 349 dev_priv->int_crt_support = general->int_crt_support; 350 dev_priv->lvds_use_ssc = general->enable_ssc; 351 dev_priv->lvds_ssc_freq = 352 intel_bios_ssc_frequency(dev, general->ssc_freq); 353 dev_priv->display_clock_mode = general->display_clock_mode; 354 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", 355 dev_priv->int_tv_support, 356 dev_priv->int_crt_support, 357 dev_priv->lvds_use_ssc, 358 dev_priv->lvds_ssc_freq, 359 dev_priv->display_clock_mode); 360 } 361} 362 363static void 364parse_general_definitions(struct drm_i915_private *dev_priv, 365 struct bdb_header *bdb) 366{ 367 struct bdb_general_definitions *general; 368 369 general = find_section(bdb, BDB_GENERAL_DEFINITIONS); 370 if (general) { 371 u16 block_size = get_blocksize(general); 372 if (block_size >= sizeof(*general)) { 373 int bus_pin = general->crt_ddc_gmbus_pin; 374 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 375 if (intel_gmbus_is_port_valid(bus_pin)) 376 dev_priv->crt_ddc_pin = bus_pin; 377 } else { 378 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", 379 block_size); 380 } 381 } 382} 383 384static void 385parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, 386 struct bdb_header *bdb) 387{ 388 struct sdvo_device_mapping *p_mapping; 389 struct bdb_general_definitions *p_defs; 390 struct child_device_config *p_child; 391 int i, child_device_num, count; 392 u16 block_size; 393 394 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 395 if (!p_defs) { 396 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 397 return; 398 } 399 /* judge whether the size of child device meets the requirements. 400 * If the child device size obtained from general definition block 401 * is different with sizeof(struct child_device_config), skip the 402 * parsing of sdvo device info 403 */ 404 if (p_defs->child_dev_size != sizeof(*p_child)) { 405 /* different child dev size . Ignore it */ 406 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 407 return; 408 } 409 /* get the block size of general definitions */ 410 block_size = get_blocksize(p_defs); 411 /* get the number of child device */ 412 child_device_num = (block_size - sizeof(*p_defs)) / 413 sizeof(*p_child); 414 count = 0; 415 for (i = 0; i < child_device_num; i++) { 416 p_child = &(p_defs->devices[i]); 417 if (!p_child->device_type) { 418 /* skip the device block if device type is invalid */ 419 continue; 420 } 421 if (p_child->slave_addr != SLAVE_ADDR1 && 422 p_child->slave_addr != SLAVE_ADDR2) { 423 /* 424 * If the slave address is neither 0x70 nor 0x72, 425 * it is not a SDVO device. Skip it. 426 */ 427 continue; 428 } 429 if (p_child->dvo_port != DEVICE_PORT_DVOB && 430 p_child->dvo_port != DEVICE_PORT_DVOC) { 431 /* skip the incorrect SDVO port */ 432 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 433 continue; 434 } 435 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 436 " %s port\n", 437 p_child->slave_addr, 438 (p_child->dvo_port == DEVICE_PORT_DVOB) ? 439 "SDVOB" : "SDVOC"); 440 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); 441 if (!p_mapping->initialized) { 442 p_mapping->dvo_port = p_child->dvo_port; 443 p_mapping->slave_addr = p_child->slave_addr; 444 p_mapping->dvo_wiring = p_child->dvo_wiring; 445 p_mapping->ddc_pin = p_child->ddc_pin; 446 p_mapping->i2c_pin = p_child->i2c_pin; 447 p_mapping->initialized = 1; 448 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 449 p_mapping->dvo_port, 450 p_mapping->slave_addr, 451 p_mapping->dvo_wiring, 452 p_mapping->ddc_pin, 453 p_mapping->i2c_pin); 454 } else { 455 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 456 "two SDVO device.\n"); 457 } 458 if (p_child->slave2_addr) { 459 /* Maybe this is a SDVO device with multiple inputs */ 460 /* And the mapping info is not added */ 461 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 462 " is a SDVO device with multiple inputs.\n"); 463 } 464 count++; 465 } 466 467 if (!count) { 468 /* No SDVO device info is found */ 469 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 470 } 471 return; 472} 473 474static void 475parse_driver_features(struct drm_i915_private *dev_priv, 476 struct bdb_header *bdb) 477{ 478 struct drm_device *dev = dev_priv->dev; 479 struct bdb_driver_features *driver; 480 481 driver = find_section(bdb, BDB_DRIVER_FEATURES); 482 if (!driver) 483 return; 484 485 if (SUPPORTS_EDP(dev) && 486 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 487 dev_priv->edp.support = 1; 488 489 if (driver->dual_frequency) 490 dev_priv->render_reclock_avail = true; 491} 492 493static void 494parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 495{ 496 struct bdb_edp *edp; 497 struct edp_power_seq *edp_pps; 498 struct edp_link_params *edp_link_params; 499 500 edp = find_section(bdb, BDB_EDP); 501 if (!edp) { 502 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) { 503 DRM_DEBUG_KMS("No eDP BDB found but eDP panel " 504 "supported, assume %dbpp panel color " 505 "depth.\n", 506 dev_priv->edp.bpp); 507 } 508 return; 509 } 510 511 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 512 case EDP_18BPP: 513 dev_priv->edp.bpp = 18; 514 break; 515 case EDP_24BPP: 516 dev_priv->edp.bpp = 24; 517 break; 518 case EDP_30BPP: 519 dev_priv->edp.bpp = 30; 520 break; 521 } 522 523 /* Get the eDP sequencing and link info */ 524 edp_pps = &edp->power_seqs[panel_type]; 525 edp_link_params = &edp->link_params[panel_type]; 526 527 dev_priv->edp.pps = *edp_pps; 528 529 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 530 DP_LINK_BW_1_62; 531 switch (edp_link_params->lanes) { 532 case 0: 533 dev_priv->edp.lanes = 1; 534 break; 535 case 1: 536 dev_priv->edp.lanes = 2; 537 break; 538 case 3: 539 default: 540 dev_priv->edp.lanes = 4; 541 break; 542 } 543 switch (edp_link_params->preemphasis) { 544 case 0: 545 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0; 546 break; 547 case 1: 548 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; 549 break; 550 case 2: 551 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6; 552 break; 553 case 3: 554 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; 555 break; 556 } 557 switch (edp_link_params->vswing) { 558 case 0: 559 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400; 560 break; 561 case 1: 562 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600; 563 break; 564 case 2: 565 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800; 566 break; 567 case 3: 568 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200; 569 break; 570 } 571} 572 573static void 574parse_device_mapping(struct drm_i915_private *dev_priv, 575 struct bdb_header *bdb) 576{ 577 struct bdb_general_definitions *p_defs; 578 struct child_device_config *p_child, *child_dev_ptr; 579 int i, child_device_num, count; 580 u16 block_size; 581 582 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 583 if (!p_defs) { 584 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 585 return; 586 } 587 /* judge whether the size of child device meets the requirements. 588 * If the child device size obtained from general definition block 589 * is different with sizeof(struct child_device_config), skip the 590 * parsing of sdvo device info 591 */ 592 if (p_defs->child_dev_size != sizeof(*p_child)) { 593 /* different child dev size . Ignore it */ 594 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 595 return; 596 } 597 /* get the block size of general definitions */ 598 block_size = get_blocksize(p_defs); 599 /* get the number of child device */ 600 child_device_num = (block_size - sizeof(*p_defs)) / 601 sizeof(*p_child); 602 count = 0; 603 /* get the number of child device that is present */ 604 for (i = 0; i < child_device_num; i++) { 605 p_child = &(p_defs->devices[i]); 606 if (!p_child->device_type) { 607 /* skip the device block if device type is invalid */ 608 continue; 609 } 610 count++; 611 } 612 if (!count) { 613 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 614 return; 615 } 616 dev_priv->child_dev = malloc(sizeof(*p_child) * count, DRM_MEM_KMS, 617 M_WAITOK | M_ZERO); 618 619 dev_priv->child_dev_num = count; 620 count = 0; 621 for (i = 0; i < child_device_num; i++) { 622 p_child = &(p_defs->devices[i]); 623 if (!p_child->device_type) { 624 /* skip the device block if device type is invalid */ 625 continue; 626 } 627 child_dev_ptr = dev_priv->child_dev + count; 628 count++; 629 memcpy((void *)child_dev_ptr, (void *)p_child, 630 sizeof(*p_child)); 631 } 632 return; 633} 634 635static void 636init_vbt_defaults(struct drm_i915_private *dev_priv) 637{ 638 struct drm_device *dev = dev_priv->dev; 639 640 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC; 641 642 /* LFP panel data */ 643 dev_priv->lvds_dither = 1; 644 dev_priv->lvds_vbt = 0; 645 646 /* SDVO panel data */ 647 dev_priv->sdvo_lvds_vbt_mode = NULL; 648 649 /* general features */ 650 dev_priv->int_tv_support = 1; 651 dev_priv->int_crt_support = 1; 652 653 /* Default to using SSC */ 654 dev_priv->lvds_use_ssc = 1; 655 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1); 656 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq); 657 658 /* eDP data */ 659 dev_priv->edp.bpp = 18; 660} 661 662static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 663{ 664 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 665 "VBIOS ROM for %s\n", 666 id->ident); 667 return 1; 668} 669 670static const struct dmi_system_id intel_no_opregion_vbt[] = { 671 { 672 .callback = intel_no_opregion_vbt_callback, 673 .ident = "ThinkCentre A57", 674 .matches = { 675 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 676 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 677 }, 678 }, 679 { } 680}; 681 682/** 683 * intel_parse_bios - find VBT and initialize settings from the BIOS 684 * @dev: DRM device 685 * 686 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers 687 * to appropriate values. 688 * 689 * Returns 0 on success, nonzero on failure. 690 */ 691bool 692intel_parse_bios(struct drm_device *dev) 693{ 694 struct drm_i915_private *dev_priv = dev->dev_private; 695 struct bdb_header *bdb = NULL; 696 u8 *bios; 697 698 init_vbt_defaults(dev_priv); 699 700 /* XXX Should this validation be moved to intel_opregion.c? */ 701 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { 702 struct vbt_header *vbt = dev_priv->opregion.vbt; 703 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 704 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 705 vbt->signature); 706 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 707 } else 708 dev_priv->opregion.vbt = NULL; 709 } 710 bios = NULL; 711 712#if 1 713 if (bdb == NULL) { 714 KIB_NOTYET(); 715 return (-1); 716 } 717#else 718 if (bdb == NULL) { 719 struct vbt_header *vbt = NULL; 720 size_t size; 721 int i; 722 723 bios = pci_map_rom(pdev, &size); 724 if (!bios) 725 return -1; 726 727 /* Scour memory looking for the VBT signature */ 728 for (i = 0; i + 4 < size; i++) { 729 if (!memcmp(bios + i, "$VBT", 4)) { 730 vbt = (struct vbt_header *)(bios + i); 731 break; 732 } 733 } 734 735 if (!vbt) { 736 DRM_DEBUG_DRIVER("VBT signature missing\n"); 737 pci_unmap_rom(pdev, bios); 738 return -1; 739 } 740 741 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 742 } 743#endif 744 745 /* Grab useful general definitions */ 746 parse_general_features(dev_priv, bdb); 747 parse_general_definitions(dev_priv, bdb); 748 parse_lfp_panel_data(dev_priv, bdb); 749 parse_sdvo_panel_data(dev_priv, bdb); 750 parse_sdvo_device_mapping(dev_priv, bdb); 751 parse_device_mapping(dev_priv, bdb); 752 parse_driver_features(dev_priv, bdb); 753 parse_edp(dev_priv, bdb); 754 755#if 0 756 if (bios) 757 pci_unmap_rom(pdev, bios); 758#endif 759 760 return 0; 761} 762 763/* Ensure that vital registers have been initialised, even if the BIOS 764 * is absent or just failing to do its job. 765 */ 766void intel_setup_bios(struct drm_device *dev) 767{ 768 struct drm_i915_private *dev_priv = dev->dev_private; 769 770 /* Set the Panel Power On/Off timings if uninitialized. */ 771 if ((I915_READ(PP_ON_DELAYS) == 0) && (I915_READ(PP_OFF_DELAYS) == 0)) { 772 /* Set T2 to 40ms and T5 to 200ms */ 773 I915_WRITE(PP_ON_DELAYS, 0x019007d0); 774 775 /* Set T3 to 35ms and Tx to 200ms */ 776 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); 777 } 778} 779