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->vbt.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->vbt.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 = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 235 if (!panel_fixed_mode) 236 return; 237 238 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); 239 240 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode; 241 242 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); 243 drm_mode_debug_printmodeline(panel_fixed_mode); 244 245 /* 246 * Iterate over the LVDS panel timing info to find the lowest clock 247 * for the native resolution. 248 */ 249 downclock = panel_dvo_timing->clock; 250 for (i = 0; i < 16; i++) { 251 const struct lvds_dvo_timing *dvo_timing; 252 253 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 254 lvds_lfp_data_ptrs, 255 i); 256 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && 257 dvo_timing->clock < downclock) 258 downclock = dvo_timing->clock; 259 } 260 261 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) { 262 dev_priv->lvds_downclock_avail = 1; 263 dev_priv->lvds_downclock = downclock * 10; 264 DRM_DEBUG_KMS("LVDS downclock is found in VBT. " 265 "Normal Clock %dKHz, downclock %dKHz\n", 266 panel_fixed_mode->clock, 10*downclock); 267 } 268 269 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, 270 lvds_lfp_data_ptrs, 271 lvds_options->panel_type); 272 if (fp_timing) { 273 /* check the resolution, just to be sure */ 274 if (fp_timing->x_res == panel_fixed_mode->hdisplay && 275 fp_timing->y_res == panel_fixed_mode->vdisplay) { 276 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val; 277 DRM_DEBUG_KMS("VBT initial LVDS value %x\n", 278 dev_priv->vbt.bios_lvds_val); 279 } 280 } 281 } 282 283 /* Try to find sdvo panel data */ 284 static void 285 parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 286 struct bdb_header *bdb) 287 { 288 struct lvds_dvo_timing *dvo_timing; 289 struct drm_display_mode *panel_fixed_mode; 290 int index; 291 292 index = i915_vbt_sdvo_panel_type; 293 if (index == -2) { 294 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); 295 return; 296 } 297 298 if (index == -1) { 299 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 300 301 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 302 if (!sdvo_lvds_options) 303 return; 304 305 index = sdvo_lvds_options->panel_type; 306 } 307 308 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 309 if (!dvo_timing) 310 return; 311 312 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 313 if (!panel_fixed_mode) 314 return; 315 316 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); 317 318 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode; 319 320 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 321 drm_mode_debug_printmodeline(panel_fixed_mode); 322 } 323 324 static int intel_bios_ssc_frequency(struct drm_device *dev, 325 bool alternate) 326 { 327 switch (INTEL_INFO(dev)->gen) { 328 case 2: 329 return alternate ? 66 : 48; 330 case 3: 331 case 4: 332 return alternate ? 100 : 96; 333 default: 334 return alternate ? 100 : 120; 335 } 336 } 337 338 static void 339 parse_general_features(struct drm_i915_private *dev_priv, 340 struct bdb_header *bdb) 341 { 342 struct drm_device *dev = dev_priv->dev; 343 struct bdb_general_features *general; 344 345 general = find_section(bdb, BDB_GENERAL_FEATURES); 346 if (general) { 347 dev_priv->vbt.int_tv_support = general->int_tv_support; 348 dev_priv->vbt.int_crt_support = general->int_crt_support; 349 dev_priv->vbt.lvds_use_ssc = general->enable_ssc; 350 dev_priv->vbt.lvds_ssc_freq = 351 intel_bios_ssc_frequency(dev, general->ssc_freq); 352 dev_priv->vbt.display_clock_mode = general->display_clock_mode; 353 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; 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 fdi_rx_polarity_inverted %d\n", 355 dev_priv->vbt.int_tv_support, 356 dev_priv->vbt.int_crt_support, 357 dev_priv->vbt.lvds_use_ssc, 358 dev_priv->vbt.lvds_ssc_freq, 359 dev_priv->vbt.display_clock_mode, 360 dev_priv->vbt.fdi_rx_polarity_inverted); 361 } 362 } 363 364 static void 365 parse_general_definitions(struct drm_i915_private *dev_priv, 366 struct bdb_header *bdb) 367 { 368 struct bdb_general_definitions *general; 369 370 general = find_section(bdb, BDB_GENERAL_DEFINITIONS); 371 if (general) { 372 u16 block_size = get_blocksize(general); 373 if (block_size >= sizeof(*general)) { 374 int bus_pin = general->crt_ddc_gmbus_pin; 375 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 376 if (intel_gmbus_is_port_valid(bus_pin)) 377 dev_priv->vbt.crt_ddc_pin = bus_pin; 378 } else { 379 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", 380 block_size); 381 } 382 } 383 } 384 385 static void 386 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, 387 struct bdb_header *bdb) 388 { 389 struct sdvo_device_mapping *p_mapping; 390 struct bdb_general_definitions *p_defs; 391 struct child_device_config *p_child; 392 int i, child_device_num, count; 393 u16 block_size; 394 395 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 396 if (!p_defs) { 397 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 398 return; 399 } 400 /* judge whether the size of child device meets the requirements. 401 * If the child device size obtained from general definition block 402 * is different with sizeof(struct child_device_config), skip the 403 * parsing of sdvo device info 404 */ 405 if (p_defs->child_dev_size != sizeof(*p_child)) { 406 /* different child dev size . Ignore it */ 407 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 408 return; 409 } 410 /* get the block size of general definitions */ 411 block_size = get_blocksize(p_defs); 412 /* get the number of child device */ 413 child_device_num = (block_size - sizeof(*p_defs)) / 414 sizeof(*p_child); 415 count = 0; 416 for (i = 0; i < child_device_num; i++) { 417 p_child = &(p_defs->devices[i]); 418 if (!p_child->device_type) { 419 /* skip the device block if device type is invalid */ 420 continue; 421 } 422 if (p_child->slave_addr != SLAVE_ADDR1 && 423 p_child->slave_addr != SLAVE_ADDR2) { 424 /* 425 * If the slave address is neither 0x70 nor 0x72, 426 * it is not a SDVO device. Skip it. 427 */ 428 continue; 429 } 430 if (p_child->dvo_port != DEVICE_PORT_DVOB && 431 p_child->dvo_port != DEVICE_PORT_DVOC) { 432 /* skip the incorrect SDVO port */ 433 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 434 continue; 435 } 436 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 437 " %s port\n", 438 p_child->slave_addr, 439 (p_child->dvo_port == DEVICE_PORT_DVOB) ? 440 "SDVOB" : "SDVOC"); 441 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); 442 if (!p_mapping->initialized) { 443 p_mapping->dvo_port = p_child->dvo_port; 444 p_mapping->slave_addr = p_child->slave_addr; 445 p_mapping->dvo_wiring = p_child->dvo_wiring; 446 p_mapping->ddc_pin = p_child->ddc_pin; 447 p_mapping->i2c_pin = p_child->i2c_pin; 448 p_mapping->initialized = 1; 449 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 450 p_mapping->dvo_port, 451 p_mapping->slave_addr, 452 p_mapping->dvo_wiring, 453 p_mapping->ddc_pin, 454 p_mapping->i2c_pin); 455 } else { 456 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 457 "two SDVO device.\n"); 458 } 459 if (p_child->slave2_addr) { 460 /* Maybe this is a SDVO device with multiple inputs */ 461 /* And the mapping info is not added */ 462 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 463 " is a SDVO device with multiple inputs.\n"); 464 } 465 count++; 466 } 467 468 if (!count) { 469 /* No SDVO device info is found */ 470 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 471 } 472 return; 473 } 474 475 static void 476 parse_driver_features(struct drm_i915_private *dev_priv, 477 struct bdb_header *bdb) 478 { 479 struct drm_device *dev = dev_priv->dev; 480 struct bdb_driver_features *driver; 481 482 driver = find_section(bdb, BDB_DRIVER_FEATURES); 483 if (!driver) 484 return; 485 486 if (SUPPORTS_EDP(dev) && 487 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 488 dev_priv->vbt.edp_support = 1; 489 490 if (driver->dual_frequency) 491 dev_priv->render_reclock_avail = true; 492 } 493 494 static void 495 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 496 { 497 struct bdb_edp *edp; 498 struct edp_power_seq *edp_pps; 499 struct edp_link_params *edp_link_params; 500 501 edp = find_section(bdb, BDB_EDP); 502 if (!edp) { 503 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->vbt.edp_support) 504 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n"); 505 return; 506 } 507 508 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 509 case EDP_18BPP: 510 dev_priv->vbt.edp_bpp = 18; 511 break; 512 case EDP_24BPP: 513 dev_priv->vbt.edp_bpp = 24; 514 break; 515 case EDP_30BPP: 516 dev_priv->vbt.edp_bpp = 30; 517 break; 518 } 519 520 /* Get the eDP sequencing and link info */ 521 edp_pps = &edp->power_seqs[panel_type]; 522 edp_link_params = &edp->link_params[panel_type]; 523 524 dev_priv->vbt.edp_pps = *edp_pps; 525 526 dev_priv->vbt.edp_rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 527 DP_LINK_BW_1_62; 528 switch (edp_link_params->lanes) { 529 case 0: 530 dev_priv->vbt.edp_lanes = 1; 531 break; 532 case 1: 533 dev_priv->vbt.edp_lanes = 2; 534 break; 535 case 3: 536 default: 537 dev_priv->vbt.edp_lanes = 4; 538 break; 539 } 540 switch (edp_link_params->preemphasis) { 541 case 0: 542 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0; 543 break; 544 case 1: 545 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; 546 break; 547 case 2: 548 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6; 549 break; 550 case 3: 551 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; 552 break; 553 } 554 switch (edp_link_params->vswing) { 555 case 0: 556 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400; 557 break; 558 case 1: 559 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600; 560 break; 561 case 2: 562 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800; 563 break; 564 case 3: 565 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200; 566 break; 567 } 568 } 569 570 static void 571 parse_device_mapping(struct drm_i915_private *dev_priv, 572 struct bdb_header *bdb) 573 { 574 struct bdb_general_definitions *p_defs; 575 struct child_device_config *p_child, *child_dev_ptr; 576 int i, child_device_num, count; 577 u16 block_size; 578 579 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 580 if (!p_defs) { 581 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 582 return; 583 } 584 /* judge whether the size of child device meets the requirements. 585 * If the child device size obtained from general definition block 586 * is different with sizeof(struct child_device_config), skip the 587 * parsing of sdvo device info 588 */ 589 if (p_defs->child_dev_size != sizeof(*p_child)) { 590 /* different child dev size . Ignore it */ 591 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 592 return; 593 } 594 /* get the block size of general definitions */ 595 block_size = get_blocksize(p_defs); 596 /* get the number of child device */ 597 child_device_num = (block_size - sizeof(*p_defs)) / 598 sizeof(*p_child); 599 count = 0; 600 /* get the number of child device that is present */ 601 for (i = 0; i < child_device_num; i++) { 602 p_child = &(p_defs->devices[i]); 603 if (!p_child->device_type) { 604 /* skip the device block if device type is invalid */ 605 continue; 606 } 607 count++; 608 } 609 if (!count) { 610 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 611 return; 612 } 613 dev_priv->vbt.child_dev = kmalloc(sizeof(*p_child) * count, M_DRM, 614 M_WAITOK | M_ZERO); 615 if (!dev_priv->vbt.child_dev) { 616 DRM_DEBUG_KMS("No memory space for child device\n"); 617 return; 618 } 619 620 dev_priv->vbt.child_dev_num = count; 621 count = 0; 622 for (i = 0; i < child_device_num; i++) { 623 p_child = &(p_defs->devices[i]); 624 if (!p_child->device_type) { 625 /* skip the device block if device type is invalid */ 626 continue; 627 } 628 child_dev_ptr = dev_priv->vbt.child_dev + count; 629 count++; 630 memcpy((void *)child_dev_ptr, (void *)p_child, 631 sizeof(*p_child)); 632 } 633 return; 634 } 635 636 static void 637 init_vbt_defaults(struct drm_i915_private *dev_priv) 638 { 639 struct drm_device *dev = dev_priv->dev; 640 641 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC; 642 643 /* LFP panel data */ 644 dev_priv->vbt.lvds_dither = 1; 645 dev_priv->vbt.lvds_vbt = 0; 646 647 /* SDVO panel data */ 648 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; 649 650 /* general features */ 651 dev_priv->vbt.int_tv_support = 1; 652 dev_priv->vbt.int_crt_support = 1; 653 654 /* Default to using SSC */ 655 dev_priv->vbt.lvds_use_ssc = 1; 656 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1); 657 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq); 658 } 659 660 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 661 { 662 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 663 "VBIOS ROM for %s\n", 664 id->ident); 665 return 1; 666 } 667 668 static const struct dmi_system_id intel_no_opregion_vbt[] = { 669 { 670 .callback = intel_no_opregion_vbt_callback, 671 .ident = "ThinkCentre A57", 672 .matches = { 673 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 674 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 675 }, 676 }, 677 { } 678 }; 679 680 /** 681 * intel_parse_bios - find VBT and initialize settings from the BIOS 682 * @dev: DRM device 683 * 684 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers 685 * to appropriate values. 686 * 687 * Returns 0 on success, nonzero on failure. 688 */ 689 int 690 intel_parse_bios(struct drm_device *dev) 691 { 692 struct drm_i915_private *dev_priv = dev->dev_private; 693 struct bdb_header *bdb = NULL; 694 u8 __iomem *bios = NULL; 695 696 if (HAS_PCH_NOP(dev)) 697 return -ENODEV; 698 699 init_vbt_defaults(dev_priv); 700 701 /* XXX Should this validation be moved to intel_opregion.c? */ 702 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { 703 struct vbt_header *vbt = dev_priv->opregion.vbt; 704 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 705 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 706 vbt->signature); 707 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 708 } else 709 dev_priv->opregion.vbt = NULL; 710 } 711 bios = NULL; 712 713 #if 1 714 if (bdb == NULL) { 715 KIB_NOTYET(); 716 return (-1); 717 } 718 #else 719 if (bdb == NULL) { 720 struct vbt_header *vbt = NULL; 721 size_t size; 722 int i; 723 724 bios = pci_map_rom(pdev, &size); 725 if (!bios) 726 return -1; 727 728 /* Scour memory looking for the VBT signature */ 729 for (i = 0; i + 4 < size; i++) { 730 if (!memcmp(bios + i, "$VBT", 4)) { 731 vbt = (struct vbt_header *)(bios + i); 732 break; 733 } 734 } 735 736 if (!vbt) { 737 DRM_DEBUG_DRIVER("VBT signature missing\n"); 738 pci_unmap_rom(pdev, bios); 739 return -1; 740 } 741 742 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 743 } 744 #endif 745 746 /* Grab useful general definitions */ 747 parse_general_features(dev_priv, bdb); 748 parse_general_definitions(dev_priv, bdb); 749 parse_lfp_panel_data(dev_priv, bdb); 750 parse_sdvo_panel_data(dev_priv, bdb); 751 parse_sdvo_device_mapping(dev_priv, bdb); 752 parse_device_mapping(dev_priv, bdb); 753 parse_driver_features(dev_priv, bdb); 754 parse_edp(dev_priv, bdb); 755 756 #if 0 757 if (bios) 758 pci_unmap_rom(pdev, bios); 759 #endif 760 761 return 0; 762 } 763 764 /* Ensure that vital registers have been initialised, even if the BIOS 765 * is absent or just failing to do its job. 766 */ 767 void intel_setup_bios(struct drm_device *dev) 768 { 769 struct drm_i915_private *dev_priv = dev->dev_private; 770 771 /* Set the Panel Power On/Off timings if uninitialized. */ 772 if (!HAS_PCH_SPLIT(dev) && 773 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) { 774 /* Set T2 to 40ms and T5 to 200ms */ 775 I915_WRITE(PP_ON_DELAYS, 0x019007d0); 776 777 /* Set T3 to 35ms and Tx to 200ms */ 778 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); 779 } 780 } 781