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 28 #include <drm/drm_dp_helper.h> 29 #include <drm/i915_drm.h> 30 31 #include "display/intel_display.h" 32 #include "display/intel_gmbus.h" 33 34 #include "i915_drv.h" 35 36 #define _INTEL_BIOS_PRIVATE 37 #include "intel_vbt_defs.h" 38 39 /** 40 * DOC: Video BIOS Table (VBT) 41 * 42 * The Video BIOS Table, or VBT, provides platform and board specific 43 * configuration information to the driver that is not discoverable or available 44 * through other means. The configuration is mostly related to display 45 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in 46 * the PCI ROM. 47 * 48 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB 49 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that 50 * contain the actual configuration information. The VBT Header, and thus the 51 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the 52 * BDB Header. The data blocks are concatenated after the BDB Header. The data 53 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of 54 * data. (Block 53, the MIPI Sequence Block is an exception.) 55 * 56 * The driver parses the VBT during load. The relevant information is stored in 57 * driver private data for ease of use, and the actual VBT is not read after 58 * that. 59 */ 60 61 #define SLAVE_ADDR1 0x70 62 #define SLAVE_ADDR2 0x72 63 64 /* Get BDB block size given a pointer to Block ID. */ 65 static u32 _get_blocksize(const u8 *block_base) 66 { 67 /* The MIPI Sequence Block v3+ has a separate size field. */ 68 if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3) 69 return *((const u32 *)(block_base + 4)); 70 else 71 return *((const u16 *)(block_base + 1)); 72 } 73 74 /* Get BDB block size give a pointer to data after Block ID and Block Size. */ 75 static u32 get_blocksize(const void *block_data) 76 { 77 return _get_blocksize(block_data - 3); 78 } 79 80 static const void * 81 find_section(const void *_bdb, enum bdb_block_id section_id) 82 { 83 const struct bdb_header *bdb = _bdb; 84 const u8 *base = _bdb; 85 int index = 0; 86 u32 total, current_size; 87 enum bdb_block_id current_id; 88 89 /* skip to first section */ 90 index += bdb->header_size; 91 total = bdb->bdb_size; 92 93 /* walk the sections looking for section_id */ 94 while (index + 3 < total) { 95 current_id = *(base + index); 96 current_size = _get_blocksize(base + index); 97 index += 3; 98 99 if (index + current_size > total) 100 return NULL; 101 102 if (current_id == section_id) 103 return base + index; 104 105 index += current_size; 106 } 107 108 return NULL; 109 } 110 111 static void 112 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, 113 const struct lvds_dvo_timing *dvo_timing) 114 { 115 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | 116 dvo_timing->hactive_lo; 117 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + 118 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); 119 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + 120 ((dvo_timing->hsync_pulse_width_hi << 8) | 121 dvo_timing->hsync_pulse_width_lo); 122 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + 123 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); 124 125 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | 126 dvo_timing->vactive_lo; 127 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + 128 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo); 129 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + 130 ((dvo_timing->vsync_pulse_width_hi << 4) | 131 dvo_timing->vsync_pulse_width_lo); 132 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + 133 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); 134 panel_fixed_mode->clock = dvo_timing->clock * 10; 135 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; 136 137 if (dvo_timing->hsync_positive) 138 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; 139 else 140 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; 141 142 if (dvo_timing->vsync_positive) 143 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; 144 else 145 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; 146 147 panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) | 148 dvo_timing->himage_lo; 149 panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) | 150 dvo_timing->vimage_lo; 151 152 /* Some VBTs have bogus h/vtotal values */ 153 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) 154 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; 155 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) 156 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; 157 158 drm_mode_set_name(panel_fixed_mode); 159 } 160 161 static const struct lvds_dvo_timing * 162 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data, 163 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs, 164 int index) 165 { 166 /* 167 * the size of fp_timing varies on the different platform. 168 * So calculate the DVO timing relative offset in LVDS data 169 * entry to get the DVO timing entry 170 */ 171 172 int lfp_data_size = 173 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - 174 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; 175 int dvo_timing_offset = 176 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - 177 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; 178 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index; 179 180 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset); 181 } 182 183 /* get lvds_fp_timing entry 184 * this function may return NULL if the corresponding entry is invalid 185 */ 186 static const struct lvds_fp_timing * 187 get_lvds_fp_timing(const struct bdb_header *bdb, 188 const struct bdb_lvds_lfp_data *data, 189 const struct bdb_lvds_lfp_data_ptrs *ptrs, 190 int index) 191 { 192 size_t data_ofs = (const u8 *)data - (const u8 *)bdb; 193 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */ 194 size_t ofs; 195 196 if (index >= ARRAY_SIZE(ptrs->ptr)) 197 return NULL; 198 ofs = ptrs->ptr[index].fp_timing_offset; 199 if (ofs < data_ofs || 200 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size) 201 return NULL; 202 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs); 203 } 204 205 /* Try to find integrated panel data */ 206 static void 207 parse_lfp_panel_data(struct drm_i915_private *dev_priv, 208 const struct bdb_header *bdb) 209 { 210 const struct bdb_lvds_options *lvds_options; 211 const struct bdb_lvds_lfp_data *lvds_lfp_data; 212 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; 213 const struct lvds_dvo_timing *panel_dvo_timing; 214 const struct lvds_fp_timing *fp_timing; 215 struct drm_display_mode *panel_fixed_mode; 216 int panel_type; 217 int drrs_mode; 218 int ret; 219 220 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); 221 if (!lvds_options) 222 return; 223 224 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither; 225 226 ret = intel_opregion_get_panel_type(dev_priv); 227 if (ret >= 0) { 228 WARN_ON(ret > 0xf); 229 panel_type = ret; 230 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type); 231 } else { 232 if (lvds_options->panel_type > 0xf) { 233 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n", 234 lvds_options->panel_type); 235 return; 236 } 237 panel_type = lvds_options->panel_type; 238 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type); 239 } 240 241 dev_priv->vbt.panel_type = panel_type; 242 243 drrs_mode = (lvds_options->dps_panel_type_bits 244 >> (panel_type * 2)) & MODE_MASK; 245 /* 246 * VBT has static DRRS = 0 and seamless DRRS = 2. 247 * The below piece of code is required to adjust vbt.drrs_type 248 * to match the enum drrs_support_type. 249 */ 250 switch (drrs_mode) { 251 case 0: 252 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT; 253 DRM_DEBUG_KMS("DRRS supported mode is static\n"); 254 break; 255 case 2: 256 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT; 257 DRM_DEBUG_KMS("DRRS supported mode is seamless\n"); 258 break; 259 default: 260 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED; 261 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n"); 262 break; 263 } 264 265 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); 266 if (!lvds_lfp_data) 267 return; 268 269 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); 270 if (!lvds_lfp_data_ptrs) 271 return; 272 273 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, 274 lvds_lfp_data_ptrs, 275 panel_type); 276 277 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 278 if (!panel_fixed_mode) 279 return; 280 281 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); 282 283 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode; 284 285 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); 286 drm_mode_debug_printmodeline(panel_fixed_mode); 287 288 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, 289 lvds_lfp_data_ptrs, 290 panel_type); 291 if (fp_timing) { 292 /* check the resolution, just to be sure */ 293 if (fp_timing->x_res == panel_fixed_mode->hdisplay && 294 fp_timing->y_res == panel_fixed_mode->vdisplay) { 295 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val; 296 DRM_DEBUG_KMS("VBT initial LVDS value %x\n", 297 dev_priv->vbt.bios_lvds_val); 298 } 299 } 300 } 301 302 static void 303 parse_lfp_backlight(struct drm_i915_private *dev_priv, 304 const struct bdb_header *bdb) 305 { 306 const struct bdb_lfp_backlight_data *backlight_data; 307 const struct lfp_backlight_data_entry *entry; 308 int panel_type = dev_priv->vbt.panel_type; 309 310 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT); 311 if (!backlight_data) 312 return; 313 314 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) { 315 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n", 316 backlight_data->entry_size); 317 return; 318 } 319 320 entry = &backlight_data->data[panel_type]; 321 322 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM; 323 if (!dev_priv->vbt.backlight.present) { 324 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n", 325 entry->type); 326 return; 327 } 328 329 dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI; 330 if (bdb->version >= 191 && 331 get_blocksize(backlight_data) >= sizeof(*backlight_data)) { 332 const struct lfp_backlight_control_method *method; 333 334 method = &backlight_data->backlight_control[panel_type]; 335 dev_priv->vbt.backlight.type = method->type; 336 dev_priv->vbt.backlight.controller = method->controller; 337 } 338 339 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz; 340 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm; 341 dev_priv->vbt.backlight.min_brightness = entry->min_brightness; 342 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, " 343 "active %s, min brightness %u, level %u, controller %u\n", 344 dev_priv->vbt.backlight.pwm_freq_hz, 345 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high", 346 dev_priv->vbt.backlight.min_brightness, 347 backlight_data->level[panel_type], 348 dev_priv->vbt.backlight.controller); 349 } 350 351 /* Try to find sdvo panel data */ 352 static void 353 parse_sdvo_panel_data(struct drm_i915_private *dev_priv, 354 const struct bdb_header *bdb) 355 { 356 const struct bdb_sdvo_panel_dtds *dtds; 357 struct drm_display_mode *panel_fixed_mode; 358 int index; 359 360 index = i915_modparams.vbt_sdvo_panel_type; 361 if (index == -2) { 362 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); 363 return; 364 } 365 366 if (index == -1) { 367 const struct bdb_sdvo_lvds_options *sdvo_lvds_options; 368 369 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 370 if (!sdvo_lvds_options) 371 return; 372 373 index = sdvo_lvds_options->panel_type; 374 } 375 376 dtds = find_section(bdb, BDB_SDVO_PANEL_DTDS); 377 if (!dtds) 378 return; 379 380 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 381 if (!panel_fixed_mode) 382 return; 383 384 fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]); 385 386 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode; 387 388 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); 389 drm_mode_debug_printmodeline(panel_fixed_mode); 390 } 391 392 static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv, 393 bool alternate) 394 { 395 switch (INTEL_GEN(dev_priv)) { 396 case 2: 397 return alternate ? 66667 : 48000; 398 case 3: 399 case 4: 400 return alternate ? 100000 : 96000; 401 default: 402 return alternate ? 100000 : 120000; 403 } 404 } 405 406 static void 407 parse_general_features(struct drm_i915_private *dev_priv, 408 const struct bdb_header *bdb) 409 { 410 const struct bdb_general_features *general; 411 412 general = find_section(bdb, BDB_GENERAL_FEATURES); 413 if (!general) 414 return; 415 416 dev_priv->vbt.int_tv_support = general->int_tv_support; 417 /* int_crt_support can't be trusted on earlier platforms */ 418 if (bdb->version >= 155 && 419 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv))) 420 dev_priv->vbt.int_crt_support = general->int_crt_support; 421 dev_priv->vbt.lvds_use_ssc = general->enable_ssc; 422 dev_priv->vbt.lvds_ssc_freq = 423 intel_bios_ssc_frequency(dev_priv, general->ssc_freq); 424 dev_priv->vbt.display_clock_mode = general->display_clock_mode; 425 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; 426 if (bdb->version >= 181) { 427 dev_priv->vbt.orientation = general->rotate_180 ? 428 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP : 429 DRM_MODE_PANEL_ORIENTATION_NORMAL; 430 } else { 431 dev_priv->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 432 } 433 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", 434 dev_priv->vbt.int_tv_support, 435 dev_priv->vbt.int_crt_support, 436 dev_priv->vbt.lvds_use_ssc, 437 dev_priv->vbt.lvds_ssc_freq, 438 dev_priv->vbt.display_clock_mode, 439 dev_priv->vbt.fdi_rx_polarity_inverted); 440 } 441 442 static const struct child_device_config * 443 child_device_ptr(const struct bdb_general_definitions *defs, int i) 444 { 445 return (const void *) &defs->devices[i * defs->child_dev_size]; 446 } 447 448 static void 449 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, u8 bdb_version) 450 { 451 struct sdvo_device_mapping *mapping; 452 const struct child_device_config *child; 453 int i, count = 0; 454 455 /* 456 * Only parse SDVO mappings on gens that could have SDVO. This isn't 457 * accurate and doesn't have to be, as long as it's not too strict. 458 */ 459 if (!IS_GEN_RANGE(dev_priv, 3, 7)) { 460 DRM_DEBUG_KMS("Skipping SDVO device mapping\n"); 461 return; 462 } 463 464 for (i = 0, count = 0; i < dev_priv->vbt.child_dev_num; i++) { 465 child = dev_priv->vbt.child_dev + i; 466 467 if (child->slave_addr != SLAVE_ADDR1 && 468 child->slave_addr != SLAVE_ADDR2) { 469 /* 470 * If the slave address is neither 0x70 nor 0x72, 471 * it is not a SDVO device. Skip it. 472 */ 473 continue; 474 } 475 if (child->dvo_port != DEVICE_PORT_DVOB && 476 child->dvo_port != DEVICE_PORT_DVOC) { 477 /* skip the incorrect SDVO port */ 478 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 479 continue; 480 } 481 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 482 " %s port\n", 483 child->slave_addr, 484 (child->dvo_port == DEVICE_PORT_DVOB) ? 485 "SDVOB" : "SDVOC"); 486 mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1]; 487 if (!mapping->initialized) { 488 mapping->dvo_port = child->dvo_port; 489 mapping->slave_addr = child->slave_addr; 490 mapping->dvo_wiring = child->dvo_wiring; 491 mapping->ddc_pin = child->ddc_pin; 492 mapping->i2c_pin = child->i2c_pin; 493 mapping->initialized = 1; 494 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 495 mapping->dvo_port, 496 mapping->slave_addr, 497 mapping->dvo_wiring, 498 mapping->ddc_pin, 499 mapping->i2c_pin); 500 } else { 501 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 502 "two SDVO device.\n"); 503 } 504 if (child->slave2_addr) { 505 /* Maybe this is a SDVO device with multiple inputs */ 506 /* And the mapping info is not added */ 507 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 508 " is a SDVO device with multiple inputs.\n"); 509 } 510 count++; 511 } 512 513 if (!count) { 514 /* No SDVO device info is found */ 515 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 516 } 517 } 518 519 static void 520 parse_driver_features(struct drm_i915_private *dev_priv, 521 const struct bdb_header *bdb) 522 { 523 const struct bdb_driver_features *driver; 524 525 driver = find_section(bdb, BDB_DRIVER_FEATURES); 526 if (!driver) 527 return; 528 529 if (INTEL_GEN(dev_priv) >= 5) { 530 /* 531 * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS 532 * to mean "eDP". The VBT spec doesn't agree with that 533 * interpretation, but real world VBTs seem to. 534 */ 535 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS) 536 dev_priv->vbt.int_lvds_support = 0; 537 } else { 538 /* 539 * FIXME it's not clear which BDB version has the LVDS config 540 * bits defined. Revision history in the VBT spec says: 541 * "0.92 | Add two definitions for VBT value of LVDS Active 542 * Config (00b and 11b values defined) | 06/13/2005" 543 * but does not the specify the BDB version. 544 * 545 * So far version 134 (on i945gm) is the oldest VBT observed 546 * in the wild with the bits correctly populated. Version 547 * 108 (on i85x) does not have the bits correctly populated. 548 */ 549 if (bdb->version >= 134 && 550 driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS && 551 driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS) 552 dev_priv->vbt.int_lvds_support = 0; 553 } 554 555 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled); 556 /* 557 * If DRRS is not supported, drrs_type has to be set to 0. 558 * This is because, VBT is configured in such a way that 559 * static DRRS is 0 and DRRS not supported is represented by 560 * driver->drrs_enabled=false 561 */ 562 if (!driver->drrs_enabled) 563 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED; 564 dev_priv->vbt.psr.enable = driver->psr_enabled; 565 } 566 567 static void 568 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb) 569 { 570 const struct bdb_edp *edp; 571 const struct edp_power_seq *edp_pps; 572 const struct edp_fast_link_params *edp_link_params; 573 int panel_type = dev_priv->vbt.panel_type; 574 575 edp = find_section(bdb, BDB_EDP); 576 if (!edp) 577 return; 578 579 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 580 case EDP_18BPP: 581 dev_priv->vbt.edp.bpp = 18; 582 break; 583 case EDP_24BPP: 584 dev_priv->vbt.edp.bpp = 24; 585 break; 586 case EDP_30BPP: 587 dev_priv->vbt.edp.bpp = 30; 588 break; 589 } 590 591 /* Get the eDP sequencing and link info */ 592 edp_pps = &edp->power_seqs[panel_type]; 593 edp_link_params = &edp->fast_link_params[panel_type]; 594 595 dev_priv->vbt.edp.pps = *edp_pps; 596 597 switch (edp_link_params->rate) { 598 case EDP_RATE_1_62: 599 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62; 600 break; 601 case EDP_RATE_2_7: 602 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7; 603 break; 604 default: 605 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n", 606 edp_link_params->rate); 607 break; 608 } 609 610 switch (edp_link_params->lanes) { 611 case EDP_LANE_1: 612 dev_priv->vbt.edp.lanes = 1; 613 break; 614 case EDP_LANE_2: 615 dev_priv->vbt.edp.lanes = 2; 616 break; 617 case EDP_LANE_4: 618 dev_priv->vbt.edp.lanes = 4; 619 break; 620 default: 621 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n", 622 edp_link_params->lanes); 623 break; 624 } 625 626 switch (edp_link_params->preemphasis) { 627 case EDP_PREEMPHASIS_NONE: 628 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0; 629 break; 630 case EDP_PREEMPHASIS_3_5dB: 631 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1; 632 break; 633 case EDP_PREEMPHASIS_6dB: 634 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2; 635 break; 636 case EDP_PREEMPHASIS_9_5dB: 637 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3; 638 break; 639 default: 640 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n", 641 edp_link_params->preemphasis); 642 break; 643 } 644 645 switch (edp_link_params->vswing) { 646 case EDP_VSWING_0_4V: 647 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0; 648 break; 649 case EDP_VSWING_0_6V: 650 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1; 651 break; 652 case EDP_VSWING_0_8V: 653 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2; 654 break; 655 case EDP_VSWING_1_2V: 656 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3; 657 break; 658 default: 659 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n", 660 edp_link_params->vswing); 661 break; 662 } 663 664 if (bdb->version >= 173) { 665 u8 vswing; 666 667 /* Don't read from VBT if module parameter has valid value*/ 668 if (i915_modparams.edp_vswing) { 669 dev_priv->vbt.edp.low_vswing = 670 i915_modparams.edp_vswing == 1; 671 } else { 672 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF; 673 dev_priv->vbt.edp.low_vswing = vswing == 0; 674 } 675 } 676 } 677 678 static void 679 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb) 680 { 681 const struct bdb_psr *psr; 682 const struct psr_table *psr_table; 683 int panel_type = dev_priv->vbt.panel_type; 684 685 psr = find_section(bdb, BDB_PSR); 686 if (!psr) { 687 DRM_DEBUG_KMS("No PSR BDB found.\n"); 688 return; 689 } 690 691 psr_table = &psr->psr_table[panel_type]; 692 693 dev_priv->vbt.psr.full_link = psr_table->full_link; 694 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup; 695 696 /* Allowed VBT values goes from 0 to 15 */ 697 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 : 698 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames; 699 700 switch (psr_table->lines_to_wait) { 701 case 0: 702 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT; 703 break; 704 case 1: 705 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT; 706 break; 707 case 2: 708 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT; 709 break; 710 case 3: 711 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT; 712 break; 713 default: 714 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n", 715 psr_table->lines_to_wait); 716 break; 717 } 718 719 /* 720 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us 721 * Old decimal value is wake up time in multiples of 100 us. 722 */ 723 if (bdb->version >= 205 && 724 (IS_GEN9_BC(dev_priv) || IS_GEMINILAKE(dev_priv) || 725 INTEL_GEN(dev_priv) >= 10)) { 726 switch (psr_table->tp1_wakeup_time) { 727 case 0: 728 dev_priv->vbt.psr.tp1_wakeup_time_us = 500; 729 break; 730 case 1: 731 dev_priv->vbt.psr.tp1_wakeup_time_us = 100; 732 break; 733 case 3: 734 dev_priv->vbt.psr.tp1_wakeup_time_us = 0; 735 break; 736 default: 737 DRM_DEBUG_KMS("VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n", 738 psr_table->tp1_wakeup_time); 739 /* fallthrough */ 740 case 2: 741 dev_priv->vbt.psr.tp1_wakeup_time_us = 2500; 742 break; 743 } 744 745 switch (psr_table->tp2_tp3_wakeup_time) { 746 case 0: 747 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 500; 748 break; 749 case 1: 750 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 100; 751 break; 752 case 3: 753 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 0; 754 break; 755 default: 756 DRM_DEBUG_KMS("VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n", 757 psr_table->tp2_tp3_wakeup_time); 758 /* fallthrough */ 759 case 2: 760 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 2500; 761 break; 762 } 763 } else { 764 dev_priv->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100; 765 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100; 766 } 767 768 if (bdb->version >= 226) { 769 u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time; 770 771 wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3; 772 switch (wakeup_time) { 773 case 0: 774 wakeup_time = 500; 775 break; 776 case 1: 777 wakeup_time = 100; 778 break; 779 case 3: 780 wakeup_time = 50; 781 break; 782 default: 783 case 2: 784 wakeup_time = 2500; 785 break; 786 } 787 dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time; 788 } else { 789 /* Reusing PSR1 wakeup time for PSR2 in older VBTs */ 790 dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = dev_priv->vbt.psr.tp2_tp3_wakeup_time_us; 791 } 792 } 793 794 static void parse_dsi_backlight_ports(struct drm_i915_private *dev_priv, 795 u16 version, enum port port) 796 { 797 if (!dev_priv->vbt.dsi.config->dual_link || version < 197) { 798 dev_priv->vbt.dsi.bl_ports = BIT(port); 799 if (dev_priv->vbt.dsi.config->cabc_supported) 800 dev_priv->vbt.dsi.cabc_ports = BIT(port); 801 802 return; 803 } 804 805 switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) { 806 case DL_DCS_PORT_A: 807 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A); 808 break; 809 case DL_DCS_PORT_C: 810 dev_priv->vbt.dsi.bl_ports = BIT(PORT_C); 811 break; 812 default: 813 case DL_DCS_PORT_A_AND_C: 814 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C); 815 break; 816 } 817 818 if (!dev_priv->vbt.dsi.config->cabc_supported) 819 return; 820 821 switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) { 822 case DL_DCS_PORT_A: 823 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_A); 824 break; 825 case DL_DCS_PORT_C: 826 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_C); 827 break; 828 default: 829 case DL_DCS_PORT_A_AND_C: 830 dev_priv->vbt.dsi.cabc_ports = 831 BIT(PORT_A) | BIT(PORT_C); 832 break; 833 } 834 } 835 836 static void 837 parse_mipi_config(struct drm_i915_private *dev_priv, 838 const struct bdb_header *bdb) 839 { 840 const struct bdb_mipi_config *start; 841 const struct mipi_config *config; 842 const struct mipi_pps_data *pps; 843 int panel_type = dev_priv->vbt.panel_type; 844 enum port port; 845 846 /* parse MIPI blocks only if LFP type is MIPI */ 847 if (!intel_bios_is_dsi_present(dev_priv, &port)) 848 return; 849 850 /* Initialize this to undefined indicating no generic MIPI support */ 851 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID; 852 853 /* Block #40 is already parsed and panel_fixed_mode is 854 * stored in dev_priv->lfp_lvds_vbt_mode 855 * resuse this when needed 856 */ 857 858 /* Parse #52 for panel index used from panel_type already 859 * parsed 860 */ 861 start = find_section(bdb, BDB_MIPI_CONFIG); 862 if (!start) { 863 DRM_DEBUG_KMS("No MIPI config BDB found"); 864 return; 865 } 866 867 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n", 868 panel_type); 869 870 /* 871 * get hold of the correct configuration block and pps data as per 872 * the panel_type as index 873 */ 874 config = &start->config[panel_type]; 875 pps = &start->pps[panel_type]; 876 877 /* store as of now full data. Trim when we realise all is not needed */ 878 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL); 879 if (!dev_priv->vbt.dsi.config) 880 return; 881 882 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL); 883 if (!dev_priv->vbt.dsi.pps) { 884 kfree(dev_priv->vbt.dsi.config); 885 return; 886 } 887 888 parse_dsi_backlight_ports(dev_priv, bdb->version, port); 889 890 /* FIXME is the 90 vs. 270 correct? */ 891 switch (config->rotation) { 892 case ENABLE_ROTATION_0: 893 /* 894 * Most (all?) VBTs claim 0 degrees despite having 895 * an upside down panel, thus we do not trust this. 896 */ 897 dev_priv->vbt.dsi.orientation = 898 DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 899 break; 900 case ENABLE_ROTATION_90: 901 dev_priv->vbt.dsi.orientation = 902 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 903 break; 904 case ENABLE_ROTATION_180: 905 dev_priv->vbt.dsi.orientation = 906 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 907 break; 908 case ENABLE_ROTATION_270: 909 dev_priv->vbt.dsi.orientation = 910 DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 911 break; 912 } 913 914 /* We have mandatory mipi config blocks. Initialize as generic panel */ 915 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID; 916 } 917 918 /* Find the sequence block and size for the given panel. */ 919 static const u8 * 920 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence, 921 u16 panel_id, u32 *seq_size) 922 { 923 u32 total = get_blocksize(sequence); 924 const u8 *data = &sequence->data[0]; 925 u8 current_id; 926 u32 current_size; 927 int header_size = sequence->version >= 3 ? 5 : 3; 928 int index = 0; 929 int i; 930 931 /* skip new block size */ 932 if (sequence->version >= 3) 933 data += 4; 934 935 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) { 936 if (index + header_size > total) { 937 DRM_ERROR("Invalid sequence block (header)\n"); 938 return NULL; 939 } 940 941 current_id = *(data + index); 942 if (sequence->version >= 3) 943 current_size = *((const u32 *)(data + index + 1)); 944 else 945 current_size = *((const u16 *)(data + index + 1)); 946 947 index += header_size; 948 949 if (index + current_size > total) { 950 DRM_ERROR("Invalid sequence block\n"); 951 return NULL; 952 } 953 954 if (current_id == panel_id) { 955 *seq_size = current_size; 956 return data + index; 957 } 958 959 index += current_size; 960 } 961 962 DRM_ERROR("Sequence block detected but no valid configuration\n"); 963 964 return NULL; 965 } 966 967 static int goto_next_sequence(const u8 *data, int index, int total) 968 { 969 u16 len; 970 971 /* Skip Sequence Byte. */ 972 for (index = index + 1; index < total; index += len) { 973 u8 operation_byte = *(data + index); 974 index++; 975 976 switch (operation_byte) { 977 case MIPI_SEQ_ELEM_END: 978 return index; 979 case MIPI_SEQ_ELEM_SEND_PKT: 980 if (index + 4 > total) 981 return 0; 982 983 len = *((const u16 *)(data + index + 2)) + 4; 984 break; 985 case MIPI_SEQ_ELEM_DELAY: 986 len = 4; 987 break; 988 case MIPI_SEQ_ELEM_GPIO: 989 len = 2; 990 break; 991 case MIPI_SEQ_ELEM_I2C: 992 if (index + 7 > total) 993 return 0; 994 len = *(data + index + 6) + 7; 995 break; 996 default: 997 DRM_ERROR("Unknown operation byte\n"); 998 return 0; 999 } 1000 } 1001 1002 return 0; 1003 } 1004 1005 static int goto_next_sequence_v3(const u8 *data, int index, int total) 1006 { 1007 int seq_end; 1008 u16 len; 1009 u32 size_of_sequence; 1010 1011 /* 1012 * Could skip sequence based on Size of Sequence alone, but also do some 1013 * checking on the structure. 1014 */ 1015 if (total < 5) { 1016 DRM_ERROR("Too small sequence size\n"); 1017 return 0; 1018 } 1019 1020 /* Skip Sequence Byte. */ 1021 index++; 1022 1023 /* 1024 * Size of Sequence. Excludes the Sequence Byte and the size itself, 1025 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END 1026 * byte. 1027 */ 1028 size_of_sequence = *((const u32 *)(data + index)); 1029 index += 4; 1030 1031 seq_end = index + size_of_sequence; 1032 if (seq_end > total) { 1033 DRM_ERROR("Invalid sequence size\n"); 1034 return 0; 1035 } 1036 1037 for (; index < total; index += len) { 1038 u8 operation_byte = *(data + index); 1039 index++; 1040 1041 if (operation_byte == MIPI_SEQ_ELEM_END) { 1042 if (index != seq_end) { 1043 DRM_ERROR("Invalid element structure\n"); 1044 return 0; 1045 } 1046 return index; 1047 } 1048 1049 len = *(data + index); 1050 index++; 1051 1052 /* 1053 * FIXME: Would be nice to check elements like for v1/v2 in 1054 * goto_next_sequence() above. 1055 */ 1056 switch (operation_byte) { 1057 case MIPI_SEQ_ELEM_SEND_PKT: 1058 case MIPI_SEQ_ELEM_DELAY: 1059 case MIPI_SEQ_ELEM_GPIO: 1060 case MIPI_SEQ_ELEM_I2C: 1061 case MIPI_SEQ_ELEM_SPI: 1062 case MIPI_SEQ_ELEM_PMIC: 1063 break; 1064 default: 1065 DRM_ERROR("Unknown operation byte %u\n", 1066 operation_byte); 1067 break; 1068 } 1069 } 1070 1071 return 0; 1072 } 1073 1074 /* 1075 * Get len of pre-fixed deassert fragment from a v1 init OTP sequence, 1076 * skip all delay + gpio operands and stop at the first DSI packet op. 1077 */ 1078 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *dev_priv) 1079 { 1080 const u8 *data = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP]; 1081 int index, len; 1082 1083 if (WARN_ON(!data || dev_priv->vbt.dsi.seq_version != 1)) 1084 return 0; 1085 1086 /* index = 1 to skip sequence byte */ 1087 for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) { 1088 switch (data[index]) { 1089 case MIPI_SEQ_ELEM_SEND_PKT: 1090 return index == 1 ? 0 : index; 1091 case MIPI_SEQ_ELEM_DELAY: 1092 len = 5; /* 1 byte for operand + uint32 */ 1093 break; 1094 case MIPI_SEQ_ELEM_GPIO: 1095 len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */ 1096 break; 1097 default: 1098 return 0; 1099 } 1100 } 1101 1102 return 0; 1103 } 1104 1105 /* 1106 * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence. 1107 * The deassert must be done before calling intel_dsi_device_ready, so for 1108 * these devices we split the init OTP sequence into a deassert sequence and 1109 * the actual init OTP part. 1110 */ 1111 static void fixup_mipi_sequences(struct drm_i915_private *dev_priv) 1112 { 1113 u8 *init_otp; 1114 int len; 1115 1116 /* Limit this to VLV for now. */ 1117 if (!IS_VALLEYVIEW(dev_priv)) 1118 return; 1119 1120 /* Limit this to v1 vid-mode sequences */ 1121 if (dev_priv->vbt.dsi.config->is_cmd_mode || 1122 dev_priv->vbt.dsi.seq_version != 1) 1123 return; 1124 1125 /* Only do this if there are otp and assert seqs and no deassert seq */ 1126 if (!dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] || 1127 !dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] || 1128 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET]) 1129 return; 1130 1131 /* The deassert-sequence ends at the first DSI packet */ 1132 len = get_init_otp_deassert_fragment_len(dev_priv); 1133 if (!len) 1134 return; 1135 1136 DRM_DEBUG_KMS("Using init OTP fragment to deassert reset\n"); 1137 1138 /* Copy the fragment, update seq byte and terminate it */ 1139 init_otp = (u8 *)dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP]; 1140 dev_priv->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL); 1141 if (!dev_priv->vbt.dsi.deassert_seq) 1142 return; 1143 dev_priv->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET; 1144 dev_priv->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END; 1145 /* Use the copy for deassert */ 1146 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] = 1147 dev_priv->vbt.dsi.deassert_seq; 1148 /* Replace the last byte of the fragment with init OTP seq byte */ 1149 init_otp[len - 1] = MIPI_SEQ_INIT_OTP; 1150 /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */ 1151 dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1; 1152 } 1153 1154 static void 1155 parse_mipi_sequence(struct drm_i915_private *dev_priv, 1156 const struct bdb_header *bdb) 1157 { 1158 int panel_type = dev_priv->vbt.panel_type; 1159 const struct bdb_mipi_sequence *sequence; 1160 const u8 *seq_data; 1161 u32 seq_size; 1162 u8 *data; 1163 int index = 0; 1164 1165 /* Only our generic panel driver uses the sequence block. */ 1166 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID) 1167 return; 1168 1169 sequence = find_section(bdb, BDB_MIPI_SEQUENCE); 1170 if (!sequence) { 1171 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n"); 1172 return; 1173 } 1174 1175 /* Fail gracefully for forward incompatible sequence block. */ 1176 if (sequence->version >= 4) { 1177 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n", 1178 sequence->version); 1179 return; 1180 } 1181 1182 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version); 1183 1184 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size); 1185 if (!seq_data) 1186 return; 1187 1188 data = kmemdup(seq_data, seq_size, GFP_KERNEL); 1189 if (!data) 1190 return; 1191 1192 /* Parse the sequences, store pointers to each sequence. */ 1193 for (;;) { 1194 u8 seq_id = *(data + index); 1195 if (seq_id == MIPI_SEQ_END) 1196 break; 1197 1198 if (seq_id >= MIPI_SEQ_MAX) { 1199 DRM_ERROR("Unknown sequence %u\n", seq_id); 1200 goto err; 1201 } 1202 1203 /* Log about presence of sequences we won't run. */ 1204 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF) 1205 DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id); 1206 1207 dev_priv->vbt.dsi.sequence[seq_id] = data + index; 1208 1209 if (sequence->version >= 3) 1210 index = goto_next_sequence_v3(data, index, seq_size); 1211 else 1212 index = goto_next_sequence(data, index, seq_size); 1213 if (!index) { 1214 DRM_ERROR("Invalid sequence %u\n", seq_id); 1215 goto err; 1216 } 1217 } 1218 1219 dev_priv->vbt.dsi.data = data; 1220 dev_priv->vbt.dsi.size = seq_size; 1221 dev_priv->vbt.dsi.seq_version = sequence->version; 1222 1223 fixup_mipi_sequences(dev_priv); 1224 1225 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n"); 1226 return; 1227 1228 err: 1229 kfree(data); 1230 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence)); 1231 } 1232 1233 static u8 translate_iboost(u8 val) 1234 { 1235 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */ 1236 1237 if (val >= ARRAY_SIZE(mapping)) { 1238 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val); 1239 return 0; 1240 } 1241 return mapping[val]; 1242 } 1243 1244 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin) 1245 { 1246 const struct ddi_vbt_port_info *info; 1247 enum port port; 1248 1249 for (port = PORT_A; port < I915_MAX_PORTS; port++) { 1250 info = &i915->vbt.ddi_port_info[port]; 1251 1252 if (info->child && ddc_pin == info->alternate_ddc_pin) 1253 return port; 1254 } 1255 1256 return PORT_NONE; 1257 } 1258 1259 static void sanitize_ddc_pin(struct drm_i915_private *dev_priv, 1260 enum port port) 1261 { 1262 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; 1263 enum port p; 1264 1265 if (!info->alternate_ddc_pin) 1266 return; 1267 1268 p = get_port_by_ddc_pin(dev_priv, info->alternate_ddc_pin); 1269 if (p != PORT_NONE) { 1270 DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, " 1271 "disabling port %c DVI/HDMI support\n", 1272 port_name(port), info->alternate_ddc_pin, 1273 port_name(p), port_name(p)); 1274 1275 /* 1276 * If we have multiple ports supposedly sharing the 1277 * pin, then dvi/hdmi couldn't exist on the shared 1278 * port. Otherwise they share the same ddc bin and 1279 * system couldn't communicate with them separately. 1280 * 1281 * Give inverse child device order the priority, 1282 * last one wins. Yes, there are real machines 1283 * (eg. Asrock B250M-HDV) where VBT has both 1284 * port A and port E with the same AUX ch and 1285 * we must pick port E :( 1286 */ 1287 info = &dev_priv->vbt.ddi_port_info[p]; 1288 1289 info->supports_dvi = false; 1290 info->supports_hdmi = false; 1291 info->alternate_ddc_pin = 0; 1292 } 1293 } 1294 1295 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch) 1296 { 1297 const struct ddi_vbt_port_info *info; 1298 enum port port; 1299 1300 for (port = PORT_A; port < I915_MAX_PORTS; port++) { 1301 info = &i915->vbt.ddi_port_info[port]; 1302 1303 if (info->child && aux_ch == info->alternate_aux_channel) 1304 return port; 1305 } 1306 1307 return PORT_NONE; 1308 } 1309 1310 static void sanitize_aux_ch(struct drm_i915_private *dev_priv, 1311 enum port port) 1312 { 1313 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; 1314 enum port p; 1315 1316 if (!info->alternate_aux_channel) 1317 return; 1318 1319 p = get_port_by_aux_ch(dev_priv, info->alternate_aux_channel); 1320 if (p != PORT_NONE) { 1321 DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, " 1322 "disabling port %c DP support\n", 1323 port_name(port), info->alternate_aux_channel, 1324 port_name(p), port_name(p)); 1325 1326 /* 1327 * If we have multiple ports supposedlt sharing the 1328 * aux channel, then DP couldn't exist on the shared 1329 * port. Otherwise they share the same aux channel 1330 * and system couldn't communicate with them separately. 1331 * 1332 * Give inverse child device order the priority, 1333 * last one wins. Yes, there are real machines 1334 * (eg. Asrock B250M-HDV) where VBT has both 1335 * port A and port E with the same AUX ch and 1336 * we must pick port E :( 1337 */ 1338 info = &dev_priv->vbt.ddi_port_info[p]; 1339 1340 info->supports_dp = false; 1341 info->alternate_aux_channel = 0; 1342 } 1343 } 1344 1345 static const u8 cnp_ddc_pin_map[] = { 1346 [0] = 0, /* N/A */ 1347 [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT, 1348 [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT, 1349 [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */ 1350 [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */ 1351 }; 1352 1353 static const u8 icp_ddc_pin_map[] = { 1354 [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT, 1355 [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT, 1356 [TGL_DDC_BUS_DDI_C] = GMBUS_PIN_3_BXT, 1357 [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP, 1358 [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP, 1359 [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP, 1360 [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP, 1361 [TGL_DDC_BUS_PORT_5] = GMBUS_PIN_13_TC5_TGP, 1362 [TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP, 1363 }; 1364 1365 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin) 1366 { 1367 const u8 *ddc_pin_map; 1368 int n_entries; 1369 1370 if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) { 1371 ddc_pin_map = icp_ddc_pin_map; 1372 n_entries = ARRAY_SIZE(icp_ddc_pin_map); 1373 } else if (HAS_PCH_CNP(dev_priv)) { 1374 ddc_pin_map = cnp_ddc_pin_map; 1375 n_entries = ARRAY_SIZE(cnp_ddc_pin_map); 1376 } else { 1377 /* Assuming direct map */ 1378 return vbt_pin; 1379 } 1380 1381 if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0) 1382 return ddc_pin_map[vbt_pin]; 1383 1384 DRM_DEBUG_KMS("Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n", 1385 vbt_pin); 1386 return 0; 1387 } 1388 1389 static enum port dvo_port_to_port(u8 dvo_port) 1390 { 1391 /* 1392 * Each DDI port can have more than one value on the "DVO Port" field, 1393 * so look for all the possible values for each port. 1394 */ 1395 static const int dvo_ports[][3] = { 1396 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1}, 1397 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1}, 1398 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1}, 1399 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1}, 1400 [PORT_E] = { DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE}, 1401 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1}, 1402 [PORT_G] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1}, 1403 }; 1404 enum port port; 1405 int i; 1406 1407 for (port = PORT_A; port < ARRAY_SIZE(dvo_ports); port++) { 1408 for (i = 0; i < ARRAY_SIZE(dvo_ports[port]); i++) { 1409 if (dvo_ports[port][i] == -1) 1410 break; 1411 1412 if (dvo_port == dvo_ports[port][i]) 1413 return port; 1414 } 1415 } 1416 1417 return PORT_NONE; 1418 } 1419 1420 static void parse_ddi_port(struct drm_i915_private *dev_priv, 1421 const struct child_device_config *child, 1422 u8 bdb_version) 1423 { 1424 struct ddi_vbt_port_info *info; 1425 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt; 1426 enum port port; 1427 1428 port = dvo_port_to_port(child->dvo_port); 1429 if (port == PORT_NONE) 1430 return; 1431 1432 info = &dev_priv->vbt.ddi_port_info[port]; 1433 1434 if (info->child) { 1435 DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n", 1436 port_name(port)); 1437 return; 1438 } 1439 1440 is_dvi = child->device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING; 1441 is_dp = child->device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT; 1442 is_crt = child->device_type & DEVICE_TYPE_ANALOG_OUTPUT; 1443 is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0; 1444 is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR); 1445 1446 if (port == PORT_A && is_dvi) { 1447 DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n", 1448 is_hdmi ? "/HDMI" : ""); 1449 is_dvi = false; 1450 is_hdmi = false; 1451 } 1452 1453 info->supports_dvi = is_dvi; 1454 info->supports_hdmi = is_hdmi; 1455 info->supports_dp = is_dp; 1456 info->supports_edp = is_edp; 1457 1458 if (bdb_version >= 195) 1459 info->supports_typec_usb = child->dp_usb_type_c; 1460 1461 if (bdb_version >= 209) 1462 info->supports_tbt = child->tbt; 1463 1464 DRM_DEBUG_KMS("Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d LSPCON:%d USB-Type-C:%d TBT:%d\n", 1465 port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp, 1466 HAS_LSPCON(dev_priv) && child->lspcon, 1467 info->supports_typec_usb, info->supports_tbt); 1468 1469 if (is_edp && is_dvi) 1470 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n", 1471 port_name(port)); 1472 if (is_crt && port != PORT_E) 1473 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port)); 1474 if (is_crt && (is_dvi || is_dp)) 1475 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n", 1476 port_name(port)); 1477 if (is_dvi && (port == PORT_A || port == PORT_E)) 1478 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port)); 1479 if (!is_dvi && !is_dp && !is_crt) 1480 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n", 1481 port_name(port)); 1482 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E)) 1483 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port)); 1484 1485 if (is_dvi) { 1486 u8 ddc_pin; 1487 1488 ddc_pin = map_ddc_pin(dev_priv, child->ddc_pin); 1489 if (intel_gmbus_is_valid_pin(dev_priv, ddc_pin)) { 1490 info->alternate_ddc_pin = ddc_pin; 1491 sanitize_ddc_pin(dev_priv, port); 1492 } else { 1493 DRM_DEBUG_KMS("Port %c has invalid DDC pin %d, " 1494 "sticking to defaults\n", 1495 port_name(port), ddc_pin); 1496 } 1497 } 1498 1499 if (is_dp) { 1500 info->alternate_aux_channel = child->aux_channel; 1501 1502 sanitize_aux_ch(dev_priv, port); 1503 } 1504 1505 if (bdb_version >= 158) { 1506 /* The VBT HDMI level shift values match the table we have. */ 1507 u8 hdmi_level_shift = child->hdmi_level_shifter_value; 1508 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n", 1509 port_name(port), 1510 hdmi_level_shift); 1511 info->hdmi_level_shift = hdmi_level_shift; 1512 } 1513 1514 if (bdb_version >= 204) { 1515 int max_tmds_clock; 1516 1517 switch (child->hdmi_max_data_rate) { 1518 default: 1519 MISSING_CASE(child->hdmi_max_data_rate); 1520 /* fall through */ 1521 case HDMI_MAX_DATA_RATE_PLATFORM: 1522 max_tmds_clock = 0; 1523 break; 1524 case HDMI_MAX_DATA_RATE_297: 1525 max_tmds_clock = 297000; 1526 break; 1527 case HDMI_MAX_DATA_RATE_165: 1528 max_tmds_clock = 165000; 1529 break; 1530 } 1531 1532 if (max_tmds_clock) 1533 DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n", 1534 port_name(port), max_tmds_clock); 1535 info->max_tmds_clock = max_tmds_clock; 1536 } 1537 1538 /* Parse the I_boost config for SKL and above */ 1539 if (bdb_version >= 196 && child->iboost) { 1540 info->dp_boost_level = translate_iboost(child->dp_iboost_level); 1541 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n", 1542 port_name(port), info->dp_boost_level); 1543 info->hdmi_boost_level = translate_iboost(child->hdmi_iboost_level); 1544 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n", 1545 port_name(port), info->hdmi_boost_level); 1546 } 1547 1548 /* DP max link rate for CNL+ */ 1549 if (bdb_version >= 216) { 1550 switch (child->dp_max_link_rate) { 1551 default: 1552 case VBT_DP_MAX_LINK_RATE_HBR3: 1553 info->dp_max_link_rate = 810000; 1554 break; 1555 case VBT_DP_MAX_LINK_RATE_HBR2: 1556 info->dp_max_link_rate = 540000; 1557 break; 1558 case VBT_DP_MAX_LINK_RATE_HBR: 1559 info->dp_max_link_rate = 270000; 1560 break; 1561 case VBT_DP_MAX_LINK_RATE_LBR: 1562 info->dp_max_link_rate = 162000; 1563 break; 1564 } 1565 DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n", 1566 port_name(port), info->dp_max_link_rate); 1567 } 1568 1569 info->child = child; 1570 } 1571 1572 static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version) 1573 { 1574 const struct child_device_config *child; 1575 int i; 1576 1577 if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv)) 1578 return; 1579 1580 if (bdb_version < 155) 1581 return; 1582 1583 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 1584 child = dev_priv->vbt.child_dev + i; 1585 1586 parse_ddi_port(dev_priv, child, bdb_version); 1587 } 1588 } 1589 1590 static void 1591 parse_general_definitions(struct drm_i915_private *dev_priv, 1592 const struct bdb_header *bdb) 1593 { 1594 const struct bdb_general_definitions *defs; 1595 const struct child_device_config *child; 1596 int i, child_device_num, count; 1597 u8 expected_size; 1598 u16 block_size; 1599 int bus_pin; 1600 1601 defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 1602 if (!defs) { 1603 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 1604 return; 1605 } 1606 1607 block_size = get_blocksize(defs); 1608 if (block_size < sizeof(*defs)) { 1609 DRM_DEBUG_KMS("General definitions block too small (%u)\n", 1610 block_size); 1611 return; 1612 } 1613 1614 bus_pin = defs->crt_ddc_gmbus_pin; 1615 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); 1616 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin)) 1617 dev_priv->vbt.crt_ddc_pin = bus_pin; 1618 1619 if (bdb->version < 106) { 1620 expected_size = 22; 1621 } else if (bdb->version < 111) { 1622 expected_size = 27; 1623 } else if (bdb->version < 195) { 1624 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE; 1625 } else if (bdb->version == 195) { 1626 expected_size = 37; 1627 } else if (bdb->version <= 215) { 1628 expected_size = 38; 1629 } else if (bdb->version <= 229) { 1630 expected_size = 39; 1631 } else { 1632 expected_size = sizeof(*child); 1633 BUILD_BUG_ON(sizeof(*child) < 39); 1634 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n", 1635 bdb->version, expected_size); 1636 } 1637 1638 /* Flag an error for unexpected size, but continue anyway. */ 1639 if (defs->child_dev_size != expected_size) 1640 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n", 1641 defs->child_dev_size, expected_size, bdb->version); 1642 1643 /* The legacy sized child device config is the minimum we need. */ 1644 if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) { 1645 DRM_DEBUG_KMS("Child device config size %u is too small.\n", 1646 defs->child_dev_size); 1647 return; 1648 } 1649 1650 /* get the number of child device */ 1651 child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size; 1652 count = 0; 1653 /* get the number of child device that is present */ 1654 for (i = 0; i < child_device_num; i++) { 1655 child = child_device_ptr(defs, i); 1656 if (!child->device_type) 1657 continue; 1658 count++; 1659 } 1660 if (!count) { 1661 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 1662 return; 1663 } 1664 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*child), GFP_KERNEL); 1665 if (!dev_priv->vbt.child_dev) { 1666 DRM_DEBUG_KMS("No memory space for child device\n"); 1667 return; 1668 } 1669 1670 dev_priv->vbt.child_dev_num = count; 1671 count = 0; 1672 for (i = 0; i < child_device_num; i++) { 1673 child = child_device_ptr(defs, i); 1674 if (!child->device_type) 1675 continue; 1676 1677 DRM_DEBUG_KMS("Found VBT child device with type 0x%x\n", 1678 child->device_type); 1679 1680 /* 1681 * Copy as much as we know (sizeof) and is available 1682 * (child_dev_size) of the child device. Accessing the data must 1683 * depend on VBT version. 1684 */ 1685 memcpy(dev_priv->vbt.child_dev + count, child, 1686 min_t(size_t, defs->child_dev_size, sizeof(*child))); 1687 count++; 1688 } 1689 } 1690 1691 /* Common defaults which may be overridden by VBT. */ 1692 static void 1693 init_vbt_defaults(struct drm_i915_private *dev_priv) 1694 { 1695 enum port port; 1696 1697 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC; 1698 1699 /* Default to having backlight */ 1700 dev_priv->vbt.backlight.present = true; 1701 1702 /* LFP panel data */ 1703 dev_priv->vbt.lvds_dither = 1; 1704 1705 /* SDVO panel data */ 1706 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; 1707 1708 /* general features */ 1709 dev_priv->vbt.int_tv_support = 1; 1710 dev_priv->vbt.int_crt_support = 1; 1711 1712 /* driver features */ 1713 dev_priv->vbt.int_lvds_support = 1; 1714 1715 /* Default to using SSC */ 1716 dev_priv->vbt.lvds_use_ssc = 1; 1717 /* 1718 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference 1719 * clock for LVDS. 1720 */ 1721 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv, 1722 !HAS_PCH_SPLIT(dev_priv)); 1723 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq); 1724 1725 for (port = PORT_A; port < I915_MAX_PORTS; port++) { 1726 struct ddi_vbt_port_info *info = 1727 &dev_priv->vbt.ddi_port_info[port]; 1728 1729 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN; 1730 } 1731 } 1732 1733 /* Defaults to initialize only if there is no VBT. */ 1734 static void 1735 init_vbt_missing_defaults(struct drm_i915_private *dev_priv) 1736 { 1737 enum port port; 1738 1739 for (port = PORT_A; port < I915_MAX_PORTS; port++) { 1740 struct ddi_vbt_port_info *info = 1741 &dev_priv->vbt.ddi_port_info[port]; 1742 enum phy phy = intel_port_to_phy(dev_priv, port); 1743 1744 /* 1745 * VBT has the TypeC mode (native,TBT/USB) and we don't want 1746 * to detect it. 1747 */ 1748 if (intel_phy_is_tc(dev_priv, phy)) 1749 continue; 1750 1751 info->supports_dvi = (port != PORT_A && port != PORT_E); 1752 info->supports_hdmi = info->supports_dvi; 1753 info->supports_dp = (port != PORT_E); 1754 info->supports_edp = (port == PORT_A); 1755 } 1756 } 1757 1758 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt) 1759 { 1760 const void *_vbt = vbt; 1761 1762 return _vbt + vbt->bdb_offset; 1763 } 1764 1765 /** 1766 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT 1767 * @buf: pointer to a buffer to validate 1768 * @size: size of the buffer 1769 * 1770 * Returns true on valid VBT. 1771 */ 1772 bool intel_bios_is_valid_vbt(const void *buf, size_t size) 1773 { 1774 const struct vbt_header *vbt = buf; 1775 const struct bdb_header *bdb; 1776 1777 if (!vbt) 1778 return false; 1779 1780 if (sizeof(struct vbt_header) > size) { 1781 DRM_DEBUG_DRIVER("VBT header incomplete\n"); 1782 return false; 1783 } 1784 1785 if (memcmp(vbt->signature, "$VBT", 4)) { 1786 DRM_DEBUG_DRIVER("VBT invalid signature\n"); 1787 return false; 1788 } 1789 1790 if (range_overflows_t(size_t, 1791 vbt->bdb_offset, 1792 sizeof(struct bdb_header), 1793 size)) { 1794 DRM_DEBUG_DRIVER("BDB header incomplete\n"); 1795 return false; 1796 } 1797 1798 bdb = get_bdb_header(vbt); 1799 if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) { 1800 DRM_DEBUG_DRIVER("BDB incomplete\n"); 1801 return false; 1802 } 1803 1804 return vbt; 1805 } 1806 1807 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size) 1808 { 1809 size_t i; 1810 1811 /* Scour memory looking for the VBT signature. */ 1812 for (i = 0; i + 4 < size; i++) { 1813 void *vbt; 1814 1815 if (ioread32(bios + i) != *((const u32 *) "$VBT")) 1816 continue; 1817 1818 /* 1819 * This is the one place where we explicitly discard the address 1820 * space (__iomem) of the BIOS/VBT. 1821 */ 1822 vbt = (void __force *) bios + i; 1823 if (intel_bios_is_valid_vbt(vbt, size - i)) 1824 return vbt; 1825 1826 break; 1827 } 1828 1829 return NULL; 1830 } 1831 1832 /** 1833 * intel_bios_init - find VBT and initialize settings from the BIOS 1834 * @dev_priv: i915 device instance 1835 * 1836 * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT 1837 * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also 1838 * initialize some defaults if the VBT is not present at all. 1839 */ 1840 void intel_bios_init(struct drm_i915_private *dev_priv) 1841 { 1842 struct pci_dev *pdev = dev_priv->drm.pdev; 1843 const struct vbt_header *vbt = dev_priv->opregion.vbt; 1844 const struct bdb_header *bdb; 1845 u8 __iomem *bios = NULL; 1846 1847 if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv)) { 1848 DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n"); 1849 return; 1850 } 1851 1852 init_vbt_defaults(dev_priv); 1853 1854 /* If the OpRegion does not have VBT, look in PCI ROM. */ 1855 if (!vbt) { 1856 size_t size; 1857 1858 bios = pci_map_rom(pdev, &size); 1859 if (!bios) 1860 goto out; 1861 1862 vbt = find_vbt(bios, size); 1863 if (!vbt) 1864 goto out; 1865 1866 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n"); 1867 } 1868 1869 bdb = get_bdb_header(vbt); 1870 1871 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n", 1872 (int)sizeof(vbt->signature), vbt->signature, bdb->version); 1873 1874 /* Grab useful general definitions */ 1875 parse_general_features(dev_priv, bdb); 1876 parse_general_definitions(dev_priv, bdb); 1877 parse_lfp_panel_data(dev_priv, bdb); 1878 parse_lfp_backlight(dev_priv, bdb); 1879 parse_sdvo_panel_data(dev_priv, bdb); 1880 parse_driver_features(dev_priv, bdb); 1881 parse_edp(dev_priv, bdb); 1882 parse_psr(dev_priv, bdb); 1883 parse_mipi_config(dev_priv, bdb); 1884 parse_mipi_sequence(dev_priv, bdb); 1885 1886 /* Further processing on pre-parsed data */ 1887 parse_sdvo_device_mapping(dev_priv, bdb->version); 1888 parse_ddi_ports(dev_priv, bdb->version); 1889 1890 out: 1891 if (!vbt) { 1892 DRM_INFO("Failed to find VBIOS tables (VBT)\n"); 1893 init_vbt_missing_defaults(dev_priv); 1894 } 1895 1896 if (bios) 1897 pci_unmap_rom(pdev, bios); 1898 } 1899 1900 /** 1901 * intel_bios_driver_remove - Free any resources allocated by intel_bios_init() 1902 * @dev_priv: i915 device instance 1903 */ 1904 void intel_bios_driver_remove(struct drm_i915_private *dev_priv) 1905 { 1906 kfree(dev_priv->vbt.child_dev); 1907 dev_priv->vbt.child_dev = NULL; 1908 dev_priv->vbt.child_dev_num = 0; 1909 kfree(dev_priv->vbt.sdvo_lvds_vbt_mode); 1910 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; 1911 kfree(dev_priv->vbt.lfp_lvds_vbt_mode); 1912 dev_priv->vbt.lfp_lvds_vbt_mode = NULL; 1913 kfree(dev_priv->vbt.dsi.data); 1914 dev_priv->vbt.dsi.data = NULL; 1915 kfree(dev_priv->vbt.dsi.pps); 1916 dev_priv->vbt.dsi.pps = NULL; 1917 kfree(dev_priv->vbt.dsi.config); 1918 dev_priv->vbt.dsi.config = NULL; 1919 kfree(dev_priv->vbt.dsi.deassert_seq); 1920 dev_priv->vbt.dsi.deassert_seq = NULL; 1921 } 1922 1923 /** 1924 * intel_bios_is_tv_present - is integrated TV present in VBT 1925 * @dev_priv: i915 device instance 1926 * 1927 * Return true if TV is present. If no child devices were parsed from VBT, 1928 * assume TV is present. 1929 */ 1930 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv) 1931 { 1932 const struct child_device_config *child; 1933 int i; 1934 1935 if (!dev_priv->vbt.int_tv_support) 1936 return false; 1937 1938 if (!dev_priv->vbt.child_dev_num) 1939 return true; 1940 1941 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 1942 child = dev_priv->vbt.child_dev + i; 1943 /* 1944 * If the device type is not TV, continue. 1945 */ 1946 switch (child->device_type) { 1947 case DEVICE_TYPE_INT_TV: 1948 case DEVICE_TYPE_TV: 1949 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE: 1950 break; 1951 default: 1952 continue; 1953 } 1954 /* Only when the addin_offset is non-zero, it is regarded 1955 * as present. 1956 */ 1957 if (child->addin_offset) 1958 return true; 1959 } 1960 1961 return false; 1962 } 1963 1964 /** 1965 * intel_bios_is_lvds_present - is LVDS present in VBT 1966 * @dev_priv: i915 device instance 1967 * @i2c_pin: i2c pin for LVDS if present 1968 * 1969 * Return true if LVDS is present. If no child devices were parsed from VBT, 1970 * assume LVDS is present. 1971 */ 1972 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin) 1973 { 1974 const struct child_device_config *child; 1975 int i; 1976 1977 if (!dev_priv->vbt.child_dev_num) 1978 return true; 1979 1980 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 1981 child = dev_priv->vbt.child_dev + i; 1982 1983 /* If the device type is not LFP, continue. 1984 * We have to check both the new identifiers as well as the 1985 * old for compatibility with some BIOSes. 1986 */ 1987 if (child->device_type != DEVICE_TYPE_INT_LFP && 1988 child->device_type != DEVICE_TYPE_LFP) 1989 continue; 1990 1991 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin)) 1992 *i2c_pin = child->i2c_pin; 1993 1994 /* However, we cannot trust the BIOS writers to populate 1995 * the VBT correctly. Since LVDS requires additional 1996 * information from AIM blocks, a non-zero addin offset is 1997 * a good indicator that the LVDS is actually present. 1998 */ 1999 if (child->addin_offset) 2000 return true; 2001 2002 /* But even then some BIOS writers perform some black magic 2003 * and instantiate the device without reference to any 2004 * additional data. Trust that if the VBT was written into 2005 * the OpRegion then they have validated the LVDS's existence. 2006 */ 2007 if (dev_priv->opregion.vbt) 2008 return true; 2009 } 2010 2011 return false; 2012 } 2013 2014 /** 2015 * intel_bios_is_port_present - is the specified digital port present 2016 * @dev_priv: i915 device instance 2017 * @port: port to check 2018 * 2019 * Return true if the device in %port is present. 2020 */ 2021 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port) 2022 { 2023 const struct child_device_config *child; 2024 static const struct { 2025 u16 dp, hdmi; 2026 } port_mapping[] = { 2027 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, }, 2028 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, }, 2029 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, }, 2030 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, }, 2031 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, }, 2032 }; 2033 int i; 2034 2035 if (HAS_DDI(dev_priv)) { 2036 const struct ddi_vbt_port_info *port_info = 2037 &dev_priv->vbt.ddi_port_info[port]; 2038 2039 return port_info->supports_dp || 2040 port_info->supports_dvi || 2041 port_info->supports_hdmi; 2042 } 2043 2044 /* FIXME maybe deal with port A as well? */ 2045 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping)) 2046 return false; 2047 2048 if (!dev_priv->vbt.child_dev_num) 2049 return false; 2050 2051 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 2052 child = dev_priv->vbt.child_dev + i; 2053 2054 if ((child->dvo_port == port_mapping[port].dp || 2055 child->dvo_port == port_mapping[port].hdmi) && 2056 (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING | 2057 DEVICE_TYPE_DISPLAYPORT_OUTPUT))) 2058 return true; 2059 } 2060 2061 return false; 2062 } 2063 2064 /** 2065 * intel_bios_is_port_edp - is the device in given port eDP 2066 * @dev_priv: i915 device instance 2067 * @port: port to check 2068 * 2069 * Return true if the device in %port is eDP. 2070 */ 2071 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port) 2072 { 2073 const struct child_device_config *child; 2074 static const short port_mapping[] = { 2075 [PORT_B] = DVO_PORT_DPB, 2076 [PORT_C] = DVO_PORT_DPC, 2077 [PORT_D] = DVO_PORT_DPD, 2078 [PORT_E] = DVO_PORT_DPE, 2079 [PORT_F] = DVO_PORT_DPF, 2080 }; 2081 int i; 2082 2083 if (HAS_DDI(dev_priv)) 2084 return dev_priv->vbt.ddi_port_info[port].supports_edp; 2085 2086 if (!dev_priv->vbt.child_dev_num) 2087 return false; 2088 2089 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 2090 child = dev_priv->vbt.child_dev + i; 2091 2092 if (child->dvo_port == port_mapping[port] && 2093 (child->device_type & DEVICE_TYPE_eDP_BITS) == 2094 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS)) 2095 return true; 2096 } 2097 2098 return false; 2099 } 2100 2101 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child, 2102 enum port port) 2103 { 2104 static const struct { 2105 u16 dp, hdmi; 2106 } port_mapping[] = { 2107 /* 2108 * Buggy VBTs may declare DP ports as having 2109 * HDMI type dvo_port :( So let's check both. 2110 */ 2111 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, }, 2112 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, }, 2113 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, }, 2114 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, }, 2115 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, }, 2116 }; 2117 2118 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping)) 2119 return false; 2120 2121 if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) != 2122 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS)) 2123 return false; 2124 2125 if (child->dvo_port == port_mapping[port].dp) 2126 return true; 2127 2128 /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */ 2129 if (child->dvo_port == port_mapping[port].hdmi && 2130 child->aux_channel != 0) 2131 return true; 2132 2133 return false; 2134 } 2135 2136 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, 2137 enum port port) 2138 { 2139 const struct child_device_config *child; 2140 int i; 2141 2142 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 2143 child = dev_priv->vbt.child_dev + i; 2144 2145 if (child_dev_is_dp_dual_mode(child, port)) 2146 return true; 2147 } 2148 2149 return false; 2150 } 2151 2152 /** 2153 * intel_bios_is_dsi_present - is DSI present in VBT 2154 * @dev_priv: i915 device instance 2155 * @port: port for DSI if present 2156 * 2157 * Return true if DSI is present, and return the port in %port. 2158 */ 2159 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, 2160 enum port *port) 2161 { 2162 const struct child_device_config *child; 2163 u8 dvo_port; 2164 int i; 2165 2166 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { 2167 child = dev_priv->vbt.child_dev + i; 2168 2169 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT)) 2170 continue; 2171 2172 dvo_port = child->dvo_port; 2173 2174 if (dvo_port == DVO_PORT_MIPIA || 2175 (dvo_port == DVO_PORT_MIPIB && INTEL_GEN(dev_priv) >= 11) || 2176 (dvo_port == DVO_PORT_MIPIC && INTEL_GEN(dev_priv) < 11)) { 2177 if (port) 2178 *port = dvo_port - DVO_PORT_MIPIA; 2179 return true; 2180 } else if (dvo_port == DVO_PORT_MIPIB || 2181 dvo_port == DVO_PORT_MIPIC || 2182 dvo_port == DVO_PORT_MIPID) { 2183 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n", 2184 port_name(dvo_port - DVO_PORT_MIPIA)); 2185 } 2186 } 2187 2188 return false; 2189 } 2190 2191 /** 2192 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port 2193 * @i915: i915 device instance 2194 * @port: port to check 2195 * 2196 * Return true if HPD should be inverted for %port. 2197 */ 2198 bool 2199 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915, 2200 enum port port) 2201 { 2202 const struct child_device_config *child = 2203 i915->vbt.ddi_port_info[port].child; 2204 2205 if (WARN_ON_ONCE(!IS_GEN9_LP(i915))) 2206 return false; 2207 2208 return child && child->hpd_invert; 2209 } 2210 2211 /** 2212 * intel_bios_is_lspcon_present - if LSPCON is attached on %port 2213 * @i915: i915 device instance 2214 * @port: port to check 2215 * 2216 * Return true if LSPCON is present on this port 2217 */ 2218 bool 2219 intel_bios_is_lspcon_present(const struct drm_i915_private *i915, 2220 enum port port) 2221 { 2222 const struct child_device_config *child = 2223 i915->vbt.ddi_port_info[port].child; 2224 2225 return HAS_LSPCON(i915) && child && child->lspcon; 2226 } 2227 2228 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv, 2229 enum port port) 2230 { 2231 const struct ddi_vbt_port_info *info = 2232 &dev_priv->vbt.ddi_port_info[port]; 2233 enum aux_ch aux_ch; 2234 2235 if (!info->alternate_aux_channel) { 2236 aux_ch = (enum aux_ch)port; 2237 2238 DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n", 2239 aux_ch_name(aux_ch), port_name(port)); 2240 return aux_ch; 2241 } 2242 2243 switch (info->alternate_aux_channel) { 2244 case DP_AUX_A: 2245 aux_ch = AUX_CH_A; 2246 break; 2247 case DP_AUX_B: 2248 aux_ch = AUX_CH_B; 2249 break; 2250 case DP_AUX_C: 2251 aux_ch = AUX_CH_C; 2252 break; 2253 case DP_AUX_D: 2254 aux_ch = AUX_CH_D; 2255 break; 2256 case DP_AUX_E: 2257 aux_ch = AUX_CH_E; 2258 break; 2259 case DP_AUX_F: 2260 aux_ch = AUX_CH_F; 2261 break; 2262 case DP_AUX_G: 2263 aux_ch = AUX_CH_G; 2264 break; 2265 default: 2266 MISSING_CASE(info->alternate_aux_channel); 2267 aux_ch = AUX_CH_A; 2268 break; 2269 } 2270 2271 DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n", 2272 aux_ch_name(aux_ch), port_name(port)); 2273 2274 return aux_ch; 2275 } 2276