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 static void 284 parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 285 { 286 const struct bdb_lfp_backlight_data *backlight_data; 287 const struct bdb_lfp_backlight_data_entry *entry; 288 289 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT); 290 if (!backlight_data) 291 return; 292 293 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) { 294 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n", 295 backlight_data->entry_size); 296 return; 297 } 298 299 entry = &backlight_data->data[panel_type]; 300 301 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz; 302 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm; 303 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, " 304 "active %s, min brightness %u, level %u\n", 305 dev_priv->vbt.backlight.pwm_freq_hz, 306 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high", 307 entry->min_brightness, 308 backlight_data->level[panel_type]); 309 } 310 311 /* Try to find sdvo panel data */ 312 static void 313 parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 314 struct bdb_header *bdb) 315 { 316 struct lvds_dvo_timing *dvo_timing; 317 struct drm_display_mode *panel_fixed_mode; 318 int index; 319 320 index = i915_vbt_sdvo_panel_type; 321 if (index == -2) { 322 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); 323 return; 324 } 325 326 if (index == -1) { 327 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 328 329 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 330 if (!sdvo_lvds_options) 331 return; 332 333 index = sdvo_lvds_options->panel_type; 334 } 335 336 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 337 if (!dvo_timing) 338 return; 339 340 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 341 if (!panel_fixed_mode) 342 return; 343 344 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); 345 346 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode; 347 348 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 349 drm_mode_debug_printmodeline(panel_fixed_mode); 350 } 351 352 static int intel_bios_ssc_frequency(struct drm_device *dev, 353 bool alternate) 354 { 355 switch (INTEL_INFO(dev)->gen) { 356 case 2: 357 return alternate ? 66667 : 48000; 358 case 3: 359 case 4: 360 return alternate ? 100000 : 96000; 361 default: 362 return alternate ? 100000 : 120000; 363 } 364 } 365 366 static void 367 parse_general_features(struct drm_i915_private *dev_priv, 368 struct bdb_header *bdb) 369 { 370 struct drm_device *dev = dev_priv->dev; 371 struct bdb_general_features *general; 372 373 general = find_section(bdb, BDB_GENERAL_FEATURES); 374 if (general) { 375 dev_priv->vbt.int_tv_support = general->int_tv_support; 376 dev_priv->vbt.int_crt_support = general->int_crt_support; 377 dev_priv->vbt.lvds_use_ssc = general->enable_ssc; 378 dev_priv->vbt.lvds_ssc_freq = 379 intel_bios_ssc_frequency(dev, general->ssc_freq); 380 dev_priv->vbt.display_clock_mode = general->display_clock_mode; 381 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; 382 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", 383 dev_priv->vbt.int_tv_support, 384 dev_priv->vbt.int_crt_support, 385 dev_priv->vbt.lvds_use_ssc, 386 dev_priv->vbt.lvds_ssc_freq, 387 dev_priv->vbt.display_clock_mode, 388 dev_priv->vbt.fdi_rx_polarity_inverted); 389 } 390 } 391 392 static void 393 parse_general_definitions(struct drm_i915_private *dev_priv, 394 struct bdb_header *bdb) 395 { 396 struct bdb_general_definitions *general; 397 398 general = find_section(bdb, BDB_GENERAL_DEFINITIONS); 399 if (general) { 400 u16 block_size = get_blocksize(general); 401 if (block_size >= sizeof(*general)) { 402 int bus_pin = general->crt_ddc_gmbus_pin; 403 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 404 if (intel_gmbus_is_port_valid(bus_pin)) 405 dev_priv->vbt.crt_ddc_pin = bus_pin; 406 } else { 407 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", 408 block_size); 409 } 410 } 411 } 412 413 static void 414 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, 415 struct bdb_header *bdb) 416 { 417 struct sdvo_device_mapping *p_mapping; 418 struct bdb_general_definitions *p_defs; 419 union child_device_config *p_child; 420 int i, child_device_num, count; 421 u16 block_size; 422 423 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 424 if (!p_defs) { 425 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 426 return; 427 } 428 /* judge whether the size of child device meets the requirements. 429 * If the child device size obtained from general definition block 430 * is different with sizeof(struct child_device_config), skip the 431 * parsing of sdvo device info 432 */ 433 if (p_defs->child_dev_size != sizeof(*p_child)) { 434 /* different child dev size . Ignore it */ 435 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 436 return; 437 } 438 /* get the block size of general definitions */ 439 block_size = get_blocksize(p_defs); 440 /* get the number of child device */ 441 child_device_num = (block_size - sizeof(*p_defs)) / 442 sizeof(*p_child); 443 count = 0; 444 for (i = 0; i < child_device_num; i++) { 445 p_child = &(p_defs->devices[i]); 446 if (!p_child->old.device_type) { 447 /* skip the device block if device type is invalid */ 448 continue; 449 } 450 if (p_child->old.slave_addr != SLAVE_ADDR1 && 451 p_child->old.slave_addr != SLAVE_ADDR2) { 452 /* 453 * If the slave address is neither 0x70 nor 0x72, 454 * it is not a SDVO device. Skip it. 455 */ 456 continue; 457 } 458 if (p_child->old.dvo_port != DEVICE_PORT_DVOB && 459 p_child->old.dvo_port != DEVICE_PORT_DVOC) { 460 /* skip the incorrect SDVO port */ 461 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 462 continue; 463 } 464 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 465 " %s port\n", 466 p_child->old.slave_addr, 467 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ? 468 "SDVOB" : "SDVOC"); 469 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]); 470 if (!p_mapping->initialized) { 471 p_mapping->dvo_port = p_child->old.dvo_port; 472 p_mapping->slave_addr = p_child->old.slave_addr; 473 p_mapping->dvo_wiring = p_child->old.dvo_wiring; 474 p_mapping->ddc_pin = p_child->old.ddc_pin; 475 p_mapping->i2c_pin = p_child->old.i2c_pin; 476 p_mapping->initialized = 1; 477 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 478 p_mapping->dvo_port, 479 p_mapping->slave_addr, 480 p_mapping->dvo_wiring, 481 p_mapping->ddc_pin, 482 p_mapping->i2c_pin); 483 } else { 484 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 485 "two SDVO device.\n"); 486 } 487 if (p_child->old.slave2_addr) { 488 /* Maybe this is a SDVO device with multiple inputs */ 489 /* And the mapping info is not added */ 490 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 491 " is a SDVO device with multiple inputs.\n"); 492 } 493 count++; 494 } 495 496 if (!count) { 497 /* No SDVO device info is found */ 498 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 499 } 500 return; 501 } 502 503 static void 504 parse_driver_features(struct drm_i915_private *dev_priv, 505 struct bdb_header *bdb) 506 { 507 struct bdb_driver_features *driver; 508 509 driver = find_section(bdb, BDB_DRIVER_FEATURES); 510 if (!driver) 511 return; 512 513 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 514 dev_priv->vbt.edp_support = 1; 515 516 if (driver->dual_frequency) 517 dev_priv->render_reclock_avail = true; 518 } 519 520 static void 521 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 522 { 523 struct bdb_edp *edp; 524 struct edp_power_seq *edp_pps; 525 struct edp_link_params *edp_link_params; 526 527 edp = find_section(bdb, BDB_EDP); 528 if (!edp) { 529 if (dev_priv->vbt.edp_support) 530 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n"); 531 return; 532 } 533 534 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 535 case EDP_18BPP: 536 dev_priv->vbt.edp_bpp = 18; 537 break; 538 case EDP_24BPP: 539 dev_priv->vbt.edp_bpp = 24; 540 break; 541 case EDP_30BPP: 542 dev_priv->vbt.edp_bpp = 30; 543 break; 544 } 545 546 /* Get the eDP sequencing and link info */ 547 edp_pps = &edp->power_seqs[panel_type]; 548 edp_link_params = &edp->link_params[panel_type]; 549 550 dev_priv->vbt.edp_pps = *edp_pps; 551 552 dev_priv->vbt.edp_rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 553 DP_LINK_BW_1_62; 554 switch (edp_link_params->lanes) { 555 case 0: 556 dev_priv->vbt.edp_lanes = 1; 557 break; 558 case 1: 559 dev_priv->vbt.edp_lanes = 2; 560 break; 561 case 3: 562 default: 563 dev_priv->vbt.edp_lanes = 4; 564 break; 565 } 566 switch (edp_link_params->preemphasis) { 567 case 0: 568 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0; 569 break; 570 case 1: 571 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; 572 break; 573 case 2: 574 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6; 575 break; 576 case 3: 577 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; 578 break; 579 } 580 switch (edp_link_params->vswing) { 581 case 0: 582 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400; 583 break; 584 case 1: 585 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600; 586 break; 587 case 2: 588 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800; 589 break; 590 case 3: 591 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200; 592 break; 593 } 594 } 595 596 static void 597 parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 598 { 599 struct bdb_mipi *mipi; 600 601 mipi = find_section(bdb, BDB_MIPI); 602 if (!mipi) { 603 DRM_DEBUG_KMS("No MIPI BDB found"); 604 return; 605 } 606 607 /* XXX: add more info */ 608 dev_priv->vbt.dsi.panel_id = mipi->panel_id; 609 } 610 611 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, 612 struct bdb_header *bdb) 613 { 614 union child_device_config *it, *child = NULL; 615 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; 616 uint8_t hdmi_level_shift; 617 int i, j; 618 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt; 619 uint8_t aux_channel; 620 /* Each DDI port can have more than one value on the "DVO Port" field, 621 * so look for all the possible values for each port and abort if more 622 * than one is found. */ 623 int dvo_ports[][2] = { 624 {DVO_PORT_HDMIA, DVO_PORT_DPA}, 625 {DVO_PORT_HDMIB, DVO_PORT_DPB}, 626 {DVO_PORT_HDMIC, DVO_PORT_DPC}, 627 {DVO_PORT_HDMID, DVO_PORT_DPD}, 628 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ }, 629 }; 630 631 /* Find the child device to use, abort if more than one found. */ 632 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 633 it = dev_priv->vbt.child_dev + i; 634 635 for (j = 0; j < 2; j++) { 636 if (dvo_ports[port][j] == -1) 637 break; 638 639 if (it->common.dvo_port == dvo_ports[port][j]) { 640 if (child) { 641 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n", 642 port_name(port)); 643 return; 644 } 645 child = it; 646 } 647 } 648 } 649 if (!child) 650 return; 651 652 aux_channel = child->raw[25]; 653 654 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING; 655 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT; 656 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT; 657 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0; 658 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR); 659 660 info->supports_dvi = is_dvi; 661 info->supports_hdmi = is_hdmi; 662 info->supports_dp = is_dp; 663 664 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n", 665 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt); 666 667 if (is_edp && is_dvi) 668 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n", 669 port_name(port)); 670 if (is_crt && port != PORT_E) 671 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port)); 672 if (is_crt && (is_dvi || is_dp)) 673 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n", 674 port_name(port)); 675 if (is_dvi && (port == PORT_A || port == PORT_E)) 676 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port)); 677 if (!is_dvi && !is_dp && !is_crt) 678 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n", 679 port_name(port)); 680 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E)) 681 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port)); 682 683 if (is_dvi) { 684 if (child->common.ddc_pin == 0x05 && port != PORT_B) 685 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n"); 686 if (child->common.ddc_pin == 0x04 && port != PORT_C) 687 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n"); 688 if (child->common.ddc_pin == 0x06 && port != PORT_D) 689 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n"); 690 } 691 692 if (is_dp) { 693 if (aux_channel == 0x40 && port != PORT_A) 694 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n"); 695 if (aux_channel == 0x10 && port != PORT_B) 696 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n"); 697 if (aux_channel == 0x20 && port != PORT_C) 698 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n"); 699 if (aux_channel == 0x30 && port != PORT_D) 700 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n"); 701 } 702 703 if (bdb->version >= 158) { 704 /* The VBT HDMI level shift values match the table we have. */ 705 hdmi_level_shift = child->raw[7] & 0xF; 706 if (hdmi_level_shift < 0xC) { 707 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n", 708 port_name(port), 709 hdmi_level_shift); 710 info->hdmi_level_shift = hdmi_level_shift; 711 } 712 } 713 } 714 715 static void parse_ddi_ports(struct drm_i915_private *dev_priv, 716 struct bdb_header *bdb) 717 { 718 struct drm_device *dev = dev_priv->dev; 719 enum port port; 720 721 if (!HAS_DDI(dev)) 722 return; 723 724 if (!dev_priv->vbt.child_dev_num) 725 return; 726 727 if (bdb->version < 155) 728 return; 729 730 for (port = PORT_A; port < I915_MAX_PORTS; port++) 731 parse_ddi_port(dev_priv, port, bdb); 732 } 733 734 static void 735 parse_device_mapping(struct drm_i915_private *dev_priv, 736 struct bdb_header *bdb) 737 { 738 struct bdb_general_definitions *p_defs; 739 union child_device_config *p_child, *child_dev_ptr; 740 int i, child_device_num, count; 741 u16 block_size; 742 743 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 744 if (!p_defs) { 745 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 746 return; 747 } 748 /* judge whether the size of child device meets the requirements. 749 * If the child device size obtained from general definition block 750 * is different with sizeof(struct child_device_config), skip the 751 * parsing of sdvo device info 752 */ 753 if (p_defs->child_dev_size != sizeof(*p_child)) { 754 /* different child dev size . Ignore it */ 755 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 756 return; 757 } 758 /* get the block size of general definitions */ 759 block_size = get_blocksize(p_defs); 760 /* get the number of child device */ 761 child_device_num = (block_size - sizeof(*p_defs)) / 762 sizeof(*p_child); 763 count = 0; 764 /* get the number of child device that is present */ 765 for (i = 0; i < child_device_num; i++) { 766 p_child = &(p_defs->devices[i]); 767 if (!p_child->common.device_type) { 768 /* skip the device block if device type is invalid */ 769 continue; 770 } 771 count++; 772 } 773 if (!count) { 774 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 775 return; 776 } 777 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL); 778 if (!dev_priv->vbt.child_dev) { 779 DRM_DEBUG_KMS("No memory space for child device\n"); 780 return; 781 } 782 783 dev_priv->vbt.child_dev_num = count; 784 count = 0; 785 for (i = 0; i < child_device_num; i++) { 786 p_child = &(p_defs->devices[i]); 787 if (!p_child->common.device_type) { 788 /* skip the device block if device type is invalid */ 789 continue; 790 } 791 child_dev_ptr = dev_priv->vbt.child_dev + count; 792 count++; 793 memcpy((void *)child_dev_ptr, (void *)p_child, 794 sizeof(*p_child)); 795 } 796 return; 797 } 798 799 static void 800 init_vbt_defaults(struct drm_i915_private *dev_priv) 801 { 802 struct drm_device *dev = dev_priv->dev; 803 enum port port; 804 805 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC; 806 807 /* LFP panel data */ 808 dev_priv->vbt.lvds_dither = 1; 809 dev_priv->vbt.lvds_vbt = 0; 810 811 /* SDVO panel data */ 812 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; 813 814 /* general features */ 815 dev_priv->vbt.int_tv_support = 1; 816 dev_priv->vbt.int_crt_support = 1; 817 818 /* Default to using SSC */ 819 dev_priv->vbt.lvds_use_ssc = 1; 820 /* 821 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference 822 * clock for LVDS. 823 */ 824 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev, 825 !HAS_PCH_SPLIT(dev)); 826 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq); 827 828 for (port = PORT_A; port < I915_MAX_PORTS; port++) { 829 struct ddi_vbt_port_info *info = 830 &dev_priv->vbt.ddi_port_info[port]; 831 832 /* Recommended BSpec default: 800mV 0dB. */ 833 info->hdmi_level_shift = 6; 834 835 info->supports_dvi = (port != PORT_A && port != PORT_E); 836 info->supports_hdmi = info->supports_dvi; 837 info->supports_dp = (port != PORT_E); 838 } 839 } 840 841 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 842 { 843 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 844 "VBIOS ROM for %s\n", 845 id->ident); 846 return 1; 847 } 848 849 static const struct dmi_system_id intel_no_opregion_vbt[] = { 850 { 851 .callback = intel_no_opregion_vbt_callback, 852 .ident = "ThinkCentre A57", 853 .matches = { 854 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 855 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 856 }, 857 }, 858 { } 859 }; 860 861 /** 862 * intel_parse_bios - find VBT and initialize settings from the BIOS 863 * @dev: DRM device 864 * 865 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers 866 * to appropriate values. 867 * 868 * Returns 0 on success, nonzero on failure. 869 */ 870 int 871 intel_parse_bios(struct drm_device *dev) 872 { 873 struct drm_i915_private *dev_priv = dev->dev_private; 874 struct bdb_header *bdb = NULL; 875 u8 __iomem *bios = NULL; 876 877 if (HAS_PCH_NOP(dev)) 878 return -ENODEV; 879 880 init_vbt_defaults(dev_priv); 881 882 /* XXX Should this validation be moved to intel_opregion.c? */ 883 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { 884 struct vbt_header *vbt = dev_priv->opregion.vbt; 885 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 886 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 887 vbt->signature); 888 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 889 } else 890 dev_priv->opregion.vbt = NULL; 891 } 892 bios = NULL; 893 894 #if 1 895 if (bdb == NULL) { 896 KIB_NOTYET(); 897 return (-1); 898 } 899 #else 900 if (bdb == NULL) { 901 struct vbt_header *vbt = NULL; 902 size_t size; 903 int i; 904 905 bios = pci_map_rom(pdev, &size); 906 if (!bios) 907 return -1; 908 909 /* Scour memory looking for the VBT signature */ 910 for (i = 0; i + 4 < size; i++) { 911 if (!memcmp(bios + i, "$VBT", 4)) { 912 vbt = (struct vbt_header *)(bios + i); 913 break; 914 } 915 } 916 917 if (!vbt) { 918 DRM_DEBUG_DRIVER("VBT signature missing\n"); 919 pci_unmap_rom(pdev, bios); 920 return -1; 921 } 922 923 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 924 } 925 #endif 926 927 /* Grab useful general definitions */ 928 parse_general_features(dev_priv, bdb); 929 parse_general_definitions(dev_priv, bdb); 930 parse_lfp_panel_data(dev_priv, bdb); 931 parse_lfp_backlight(dev_priv, bdb); 932 parse_sdvo_panel_data(dev_priv, bdb); 933 parse_sdvo_device_mapping(dev_priv, bdb); 934 parse_device_mapping(dev_priv, bdb); 935 parse_driver_features(dev_priv, bdb); 936 parse_edp(dev_priv, bdb); 937 parse_mipi(dev_priv, bdb); 938 parse_ddi_ports(dev_priv, bdb); 939 940 #if 0 941 if (bios) 942 pci_unmap_rom(pdev, bios); 943 #endif 944 945 return 0; 946 } 947 948 /* Ensure that vital registers have been initialised, even if the BIOS 949 * is absent or just failing to do its job. 950 */ 951 void intel_setup_bios(struct drm_device *dev) 952 { 953 struct drm_i915_private *dev_priv = dev->dev_private; 954 955 /* Set the Panel Power On/Off timings if uninitialized. */ 956 if (!HAS_PCH_SPLIT(dev) && 957 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) { 958 /* Set T2 to 40ms and T5 to 200ms */ 959 I915_WRITE(PP_ON_DELAYS, 0x019007d0); 960 961 /* Set T3 to 35ms and Tx to 200ms */ 962 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); 963 } 964 } 965