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 */ 27 #include <drm/drmP.h> 28 #include <drm/drm_dp_helper.h> 29 #include <drm/i915_drm.h> 30 #include "i915_drv.h" 31 #include "intel_bios.h" 32 33 #define SLAVE_ADDR1 0x70 34 #define SLAVE_ADDR2 0x72 35 36 static int panel_type; 37 38 static void * 39 find_section(struct bdb_header *bdb, int section_id) 40 { 41 u8 *base = (u8 *)bdb; 42 int index = 0; 43 u16 total, current_size; 44 u8 current_id; 45 46 /* skip to first section */ 47 index += bdb->header_size; 48 total = bdb->bdb_size; 49 50 /* walk the sections looking for section_id */ 51 while (index < total) { 52 current_id = *(base + index); 53 index++; 54 current_size = *((u16 *)(base + index)); 55 index += 2; 56 if (current_id == section_id) 57 return base + index; 58 index += current_size; 59 } 60 61 return NULL; 62 } 63 64 static u16 65 get_blocksize(void *p) 66 { 67 u16 *block_ptr, block_size; 68 69 block_ptr = (u16 *)((char *)p - 2); 70 block_size = *block_ptr; 71 return block_size; 72 } 73 74 static void 75 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, 76 const struct lvds_dvo_timing *dvo_timing) 77 { 78 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | 79 dvo_timing->hactive_lo; 80 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + 81 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); 82 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + 83 dvo_timing->hsync_pulse_width; 84 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + 85 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); 86 87 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | 88 dvo_timing->vactive_lo; 89 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + 90 dvo_timing->vsync_off; 91 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + 92 dvo_timing->vsync_pulse_width; 93 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + 94 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); 95 panel_fixed_mode->clock = dvo_timing->clock * 10; 96 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; 97 98 if (dvo_timing->hsync_positive) 99 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; 100 else 101 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; 102 103 if (dvo_timing->vsync_positive) 104 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; 105 else 106 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; 107 108 /* Some VBTs have bogus h/vtotal values */ 109 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) 110 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; 111 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) 112 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; 113 114 drm_mode_set_name(panel_fixed_mode); 115 } 116 117 static bool 118 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a, 119 const struct lvds_dvo_timing *b) 120 { 121 if (a->hactive_hi != b->hactive_hi || 122 a->hactive_lo != b->hactive_lo) 123 return false; 124 125 if (a->hsync_off_hi != b->hsync_off_hi || 126 a->hsync_off_lo != b->hsync_off_lo) 127 return false; 128 129 if (a->hsync_pulse_width != b->hsync_pulse_width) 130 return false; 131 132 if (a->hblank_hi != b->hblank_hi || 133 a->hblank_lo != b->hblank_lo) 134 return false; 135 136 if (a->vactive_hi != b->vactive_hi || 137 a->vactive_lo != b->vactive_lo) 138 return false; 139 140 if (a->vsync_off != b->vsync_off) 141 return false; 142 143 if (a->vsync_pulse_width != b->vsync_pulse_width) 144 return false; 145 146 if (a->vblank_hi != b->vblank_hi || 147 a->vblank_lo != b->vblank_lo) 148 return false; 149 150 return true; 151 } 152 153 static const struct lvds_dvo_timing * 154 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data, 155 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs, 156 int index) 157 { 158 /* 159 * the size of fp_timing varies on the different platform. 160 * So calculate the DVO timing relative offset in LVDS data 161 * entry to get the DVO timing entry 162 */ 163 164 int lfp_data_size = 165 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - 166 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; 167 int dvo_timing_offset = 168 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - 169 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; 170 const char *entry = (const char *)lvds_lfp_data->data + lfp_data_size * index; 171 172 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset); 173 } 174 175 /* get lvds_fp_timing entry 176 * this function may return NULL if the corresponding entry is invalid 177 */ 178 static const struct lvds_fp_timing * 179 get_lvds_fp_timing(const struct bdb_header *bdb, 180 const struct bdb_lvds_lfp_data *data, 181 const struct bdb_lvds_lfp_data_ptrs *ptrs, 182 int index) 183 { 184 size_t data_ofs = (const u8 *)data - (const u8 *)bdb; 185 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */ 186 size_t ofs; 187 188 if (index >= ARRAY_SIZE(ptrs->ptr)) 189 return NULL; 190 ofs = ptrs->ptr[index].fp_timing_offset; 191 if (ofs < data_ofs || 192 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size) 193 return NULL; 194 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs); 195 } 196 197 /* Try to find integrated panel data */ 198 static void 199 parse_lfp_panel_data(struct drm_i915_private *dev_priv, 200 struct bdb_header *bdb) 201 { 202 const struct bdb_lvds_options *lvds_options; 203 const struct bdb_lvds_lfp_data *lvds_lfp_data; 204 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; 205 const struct lvds_dvo_timing *panel_dvo_timing; 206 const struct lvds_fp_timing *fp_timing; 207 struct drm_display_mode *panel_fixed_mode; 208 int i, downclock; 209 210 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); 211 if (!lvds_options) 212 return; 213 214 dev_priv->lvds_dither = lvds_options->pixel_dither; 215 if (lvds_options->panel_type == 0xff) 216 return; 217 218 panel_type = lvds_options->panel_type; 219 220 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); 221 if (!lvds_lfp_data) 222 return; 223 224 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); 225 if (!lvds_lfp_data_ptrs) 226 return; 227 228 dev_priv->lvds_vbt = 1; 229 230 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 231 lvds_lfp_data_ptrs, 232 lvds_options->panel_type); 233 234 panel_fixed_mode = kmalloc(sizeof(*panel_fixed_mode), M_DRM, 235 M_WAITOK | M_ZERO); 236 if (!panel_fixed_mode) 237 return; 238 239 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); 240 241 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; 242 243 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); 244 drm_mode_debug_printmodeline(panel_fixed_mode); 245 246 /* 247 * Iterate over the LVDS panel timing info to find the lowest clock 248 * for the native resolution. 249 */ 250 downclock = panel_dvo_timing->clock; 251 for (i = 0; i < 16; i++) { 252 const struct lvds_dvo_timing *dvo_timing; 253 254 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 255 lvds_lfp_data_ptrs, 256 i); 257 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && 258 dvo_timing->clock < downclock) 259 downclock = dvo_timing->clock; 260 } 261 262 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) { 263 dev_priv->lvds_downclock_avail = 1; 264 dev_priv->lvds_downclock = downclock * 10; 265 DRM_DEBUG_KMS("LVDS downclock is found in VBT. " 266 "Normal Clock %dKHz, downclock %dKHz\n", 267 panel_fixed_mode->clock, 10*downclock); 268 } 269 270 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, 271 lvds_lfp_data_ptrs, 272 lvds_options->panel_type); 273 if (fp_timing) { 274 /* check the resolution, just to be sure */ 275 if (fp_timing->x_res == panel_fixed_mode->hdisplay && 276 fp_timing->y_res == panel_fixed_mode->vdisplay) { 277 dev_priv->bios_lvds_val = fp_timing->lvds_reg_val; 278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n", 279 dev_priv->bios_lvds_val); 280 } 281 } 282 } 283 284 /* Try to find sdvo panel data */ 285 static void 286 parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 287 struct bdb_header *bdb) 288 { 289 struct lvds_dvo_timing *dvo_timing; 290 struct drm_display_mode *panel_fixed_mode; 291 int index; 292 293 index = i915_vbt_sdvo_panel_type; 294 if (index == -2) { 295 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); 296 return; 297 } 298 299 if (index == -1) { 300 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 301 302 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 303 if (!sdvo_lvds_options) 304 return; 305 306 index = sdvo_lvds_options->panel_type; 307 } 308 309 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 310 if (!dvo_timing) 311 return; 312 313 panel_fixed_mode = kmalloc(sizeof(*panel_fixed_mode), M_DRM, 314 M_WAITOK | M_ZERO); 315 if (!panel_fixed_mode) 316 return; 317 318 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); 319 320 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; 321 322 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 323 drm_mode_debug_printmodeline(panel_fixed_mode); 324 } 325 326 static int intel_bios_ssc_frequency(struct drm_device *dev, 327 bool alternate) 328 { 329 switch (INTEL_INFO(dev)->gen) { 330 case 2: 331 return alternate ? 66 : 48; 332 case 3: 333 case 4: 334 return alternate ? 100 : 96; 335 default: 336 return alternate ? 100 : 120; 337 } 338 } 339 340 static void 341 parse_general_features(struct drm_i915_private *dev_priv, 342 struct bdb_header *bdb) 343 { 344 struct drm_device *dev = dev_priv->dev; 345 struct bdb_general_features *general; 346 347 general = find_section(bdb, BDB_GENERAL_FEATURES); 348 if (general) { 349 dev_priv->int_tv_support = general->int_tv_support; 350 dev_priv->int_crt_support = general->int_crt_support; 351 dev_priv->lvds_use_ssc = general->enable_ssc; 352 dev_priv->lvds_ssc_freq = 353 intel_bios_ssc_frequency(dev, general->ssc_freq); 354 dev_priv->display_clock_mode = general->display_clock_mode; 355 dev_priv->fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; 356 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", 357 dev_priv->int_tv_support, 358 dev_priv->int_crt_support, 359 dev_priv->lvds_use_ssc, 360 dev_priv->lvds_ssc_freq, 361 dev_priv->display_clock_mode, 362 dev_priv->fdi_rx_polarity_inverted); 363 } 364 } 365 366 static void 367 parse_general_definitions(struct drm_i915_private *dev_priv, 368 struct bdb_header *bdb) 369 { 370 struct bdb_general_definitions *general; 371 372 general = find_section(bdb, BDB_GENERAL_DEFINITIONS); 373 if (general) { 374 u16 block_size = get_blocksize(general); 375 if (block_size >= sizeof(*general)) { 376 int bus_pin = general->crt_ddc_gmbus_pin; 377 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 378 if (intel_gmbus_is_port_valid(bus_pin)) 379 dev_priv->crt_ddc_pin = bus_pin; 380 } else { 381 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", 382 block_size); 383 } 384 } 385 } 386 387 static void 388 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, 389 struct bdb_header *bdb) 390 { 391 struct sdvo_device_mapping *p_mapping; 392 struct bdb_general_definitions *p_defs; 393 struct child_device_config *p_child; 394 int i, child_device_num, count; 395 u16 block_size; 396 397 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 398 if (!p_defs) { 399 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 400 return; 401 } 402 /* judge whether the size of child device meets the requirements. 403 * If the child device size obtained from general definition block 404 * is different with sizeof(struct child_device_config), skip the 405 * parsing of sdvo device info 406 */ 407 if (p_defs->child_dev_size != sizeof(*p_child)) { 408 /* different child dev size . Ignore it */ 409 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 410 return; 411 } 412 /* get the block size of general definitions */ 413 block_size = get_blocksize(p_defs); 414 /* get the number of child device */ 415 child_device_num = (block_size - sizeof(*p_defs)) / 416 sizeof(*p_child); 417 count = 0; 418 for (i = 0; i < child_device_num; i++) { 419 p_child = &(p_defs->devices[i]); 420 if (!p_child->device_type) { 421 /* skip the device block if device type is invalid */ 422 continue; 423 } 424 if (p_child->slave_addr != SLAVE_ADDR1 && 425 p_child->slave_addr != SLAVE_ADDR2) { 426 /* 427 * If the slave address is neither 0x70 nor 0x72, 428 * it is not a SDVO device. Skip it. 429 */ 430 continue; 431 } 432 if (p_child->dvo_port != DEVICE_PORT_DVOB && 433 p_child->dvo_port != DEVICE_PORT_DVOC) { 434 /* skip the incorrect SDVO port */ 435 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 436 continue; 437 } 438 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 439 " %s port\n", 440 p_child->slave_addr, 441 (p_child->dvo_port == DEVICE_PORT_DVOB) ? 442 "SDVOB" : "SDVOC"); 443 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); 444 if (!p_mapping->initialized) { 445 p_mapping->dvo_port = p_child->dvo_port; 446 p_mapping->slave_addr = p_child->slave_addr; 447 p_mapping->dvo_wiring = p_child->dvo_wiring; 448 p_mapping->ddc_pin = p_child->ddc_pin; 449 p_mapping->i2c_pin = p_child->i2c_pin; 450 p_mapping->initialized = 1; 451 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 452 p_mapping->dvo_port, 453 p_mapping->slave_addr, 454 p_mapping->dvo_wiring, 455 p_mapping->ddc_pin, 456 p_mapping->i2c_pin); 457 } else { 458 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 459 "two SDVO device.\n"); 460 } 461 if (p_child->slave2_addr) { 462 /* Maybe this is a SDVO device with multiple inputs */ 463 /* And the mapping info is not added */ 464 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 465 " is a SDVO device with multiple inputs.\n"); 466 } 467 count++; 468 } 469 470 if (!count) { 471 /* No SDVO device info is found */ 472 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 473 } 474 return; 475 } 476 477 static void 478 parse_driver_features(struct drm_i915_private *dev_priv, 479 struct bdb_header *bdb) 480 { 481 struct drm_device *dev = dev_priv->dev; 482 struct bdb_driver_features *driver; 483 484 driver = find_section(bdb, BDB_DRIVER_FEATURES); 485 if (!driver) 486 return; 487 488 if (SUPPORTS_EDP(dev) && 489 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 490 dev_priv->edp.support = 1; 491 492 if (driver->dual_frequency) 493 dev_priv->render_reclock_avail = true; 494 } 495 496 static void 497 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 498 { 499 struct bdb_edp *edp; 500 struct edp_power_seq *edp_pps; 501 struct edp_link_params *edp_link_params; 502 503 edp = find_section(bdb, BDB_EDP); 504 if (!edp) { 505 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) 506 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n"); 507 return; 508 } 509 510 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 511 case EDP_18BPP: 512 dev_priv->edp.bpp = 18; 513 break; 514 case EDP_24BPP: 515 dev_priv->edp.bpp = 24; 516 break; 517 case EDP_30BPP: 518 dev_priv->edp.bpp = 30; 519 break; 520 } 521 522 /* Get the eDP sequencing and link info */ 523 edp_pps = &edp->power_seqs[panel_type]; 524 edp_link_params = &edp->link_params[panel_type]; 525 526 dev_priv->edp.pps = *edp_pps; 527 528 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 529 DP_LINK_BW_1_62; 530 switch (edp_link_params->lanes) { 531 case 0: 532 dev_priv->edp.lanes = 1; 533 break; 534 case 1: 535 dev_priv->edp.lanes = 2; 536 break; 537 case 3: 538 default: 539 dev_priv->edp.lanes = 4; 540 break; 541 } 542 switch (edp_link_params->preemphasis) { 543 case 0: 544 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0; 545 break; 546 case 1: 547 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; 548 break; 549 case 2: 550 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6; 551 break; 552 case 3: 553 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; 554 break; 555 } 556 switch (edp_link_params->vswing) { 557 case 0: 558 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400; 559 break; 560 case 1: 561 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600; 562 break; 563 case 2: 564 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800; 565 break; 566 case 3: 567 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200; 568 break; 569 } 570 } 571 572 static void 573 parse_device_mapping(struct drm_i915_private *dev_priv, 574 struct bdb_header *bdb) 575 { 576 struct bdb_general_definitions *p_defs; 577 struct child_device_config *p_child, *child_dev_ptr; 578 int i, child_device_num, count; 579 u16 block_size; 580 581 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 582 if (!p_defs) { 583 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 584 return; 585 } 586 /* judge whether the size of child device meets the requirements. 587 * If the child device size obtained from general definition block 588 * is different with sizeof(struct child_device_config), skip the 589 * parsing of sdvo device info 590 */ 591 if (p_defs->child_dev_size != sizeof(*p_child)) { 592 /* different child dev size . Ignore it */ 593 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 594 return; 595 } 596 /* get the block size of general definitions */ 597 block_size = get_blocksize(p_defs); 598 /* get the number of child device */ 599 child_device_num = (block_size - sizeof(*p_defs)) / 600 sizeof(*p_child); 601 count = 0; 602 /* get the number of child device that is present */ 603 for (i = 0; i < child_device_num; i++) { 604 p_child = &(p_defs->devices[i]); 605 if (!p_child->device_type) { 606 /* skip the device block if device type is invalid */ 607 continue; 608 } 609 count++; 610 } 611 if (!count) { 612 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 613 return; 614 } 615 dev_priv->child_dev = kmalloc(sizeof(*p_child) * count, M_DRM, 616 M_WAITOK | M_ZERO); 617 if (!dev_priv->child_dev) { 618 DRM_DEBUG_KMS("No memory space for child device\n"); 619 return; 620 } 621 622 dev_priv->child_dev_num = count; 623 count = 0; 624 for (i = 0; i < child_device_num; i++) { 625 p_child = &(p_defs->devices[i]); 626 if (!p_child->device_type) { 627 /* skip the device block if device type is invalid */ 628 continue; 629 } 630 child_dev_ptr = dev_priv->child_dev + count; 631 count++; 632 memcpy((void *)child_dev_ptr, (void *)p_child, 633 sizeof(*p_child)); 634 } 635 return; 636 } 637 638 static void 639 init_vbt_defaults(struct drm_i915_private *dev_priv) 640 { 641 struct drm_device *dev = dev_priv->dev; 642 643 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC; 644 645 /* LFP panel data */ 646 dev_priv->lvds_dither = 1; 647 dev_priv->lvds_vbt = 0; 648 649 /* SDVO panel data */ 650 dev_priv->sdvo_lvds_vbt_mode = NULL; 651 652 /* general features */ 653 dev_priv->int_tv_support = 1; 654 dev_priv->int_crt_support = 1; 655 656 /* Default to using SSC */ 657 dev_priv->lvds_use_ssc = 1; 658 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1); 659 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq); 660 } 661 662 static int __init 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 } 669 670 static 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 */ 691 int 692 intel_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 __iomem *bios = NULL; 697 698 if (HAS_PCH_NOP(dev)) 699 return -ENODEV; 700 701 init_vbt_defaults(dev_priv); 702 703 /* XXX Should this validation be moved to intel_opregion.c? */ 704 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { 705 struct vbt_header *vbt = dev_priv->opregion.vbt; 706 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 707 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 708 vbt->signature); 709 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 710 } else 711 dev_priv->opregion.vbt = NULL; 712 } 713 bios = NULL; 714 715 #if 1 716 if (bdb == NULL) { 717 KIB_NOTYET(); 718 return (-1); 719 } 720 #else 721 if (bdb == NULL) { 722 struct vbt_header *vbt = NULL; 723 size_t size; 724 int i; 725 726 bios = pci_map_rom(pdev, &size); 727 if (!bios) 728 return -1; 729 730 /* Scour memory looking for the VBT signature */ 731 for (i = 0; i + 4 < size; i++) { 732 if (!memcmp(bios + i, "$VBT", 4)) { 733 vbt = (struct vbt_header *)(bios + i); 734 break; 735 } 736 } 737 738 if (!vbt) { 739 DRM_DEBUG_DRIVER("VBT signature missing\n"); 740 pci_unmap_rom(pdev, bios); 741 return -1; 742 } 743 744 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 745 } 746 #endif 747 748 /* Grab useful general definitions */ 749 parse_general_features(dev_priv, bdb); 750 parse_general_definitions(dev_priv, bdb); 751 parse_lfp_panel_data(dev_priv, bdb); 752 parse_sdvo_panel_data(dev_priv, bdb); 753 parse_sdvo_device_mapping(dev_priv, bdb); 754 parse_device_mapping(dev_priv, bdb); 755 parse_driver_features(dev_priv, bdb); 756 parse_edp(dev_priv, bdb); 757 758 #if 0 759 if (bios) 760 pci_unmap_rom(pdev, bios); 761 #endif 762 763 return 0; 764 } 765 766 /* Ensure that vital registers have been initialised, even if the BIOS 767 * is absent or just failing to do its job. 768 */ 769 void intel_setup_bios(struct drm_device *dev) 770 { 771 struct drm_i915_private *dev_priv = dev->dev_private; 772 773 /* Set the Panel Power On/Off timings if uninitialized. */ 774 if (!HAS_PCH_SPLIT(dev) && 775 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) { 776 /* Set T2 to 40ms and T5 to 200ms */ 777 I915_WRITE(PP_ON_DELAYS, 0x019007d0); 778 779 /* Set T3 to 35ms and Tx to 200ms */ 780 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); 781 } 782 } 783