drivers/gpu/drm/i915/display/intel_bios.c

   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_edid.h>
  29 #include <drm/display/drm_dp_helper.h>
  30 #include <drm/display/drm_dsc_helper.h>
  31
  32 #include "display/intel_display.h"
  33 #include "display/intel_display_types.h"
  34 #include "display/intel_gmbus.h"
  35
  36 #include "i915_drv.h"
  37 #include "i915_reg.h"
  38
  39 #define _INTEL_BIOS_PRIVATE
  40 #include "intel_vbt_defs.h"
  41
  42 /**
  43  * DOC: Video BIOS Table (VBT)
  44  *
  45  * The Video BIOS Table, or VBT, provides platform and board specific
  46  * configuration information to the driver that is not discoverable or available
  47  * through other means. The configuration is mostly related to display
  48  * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
  49  * the PCI ROM.
  50  *
  51  * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
  52  * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
  53  * contain the actual configuration information. The VBT Header, and thus the
  54  * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
  55  * BDB Header. The data blocks are concatenated after the BDB Header. The data
  56  * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
  57  * data. (Block 53, the MIPI Sequence Block is an exception.)
  58  *
  59  * The driver parses the VBT during load. The relevant information is stored in
  60  * driver private data for ease of use, and the actual VBT is not read after
  61  * that.
  62  */
  63
  64 /* Wrapper for VBT child device config */
  65 struct intel_bios_encoder_data {
  66         struct drm_i915_private *i915;
  67
  68         struct child_device_config child;
  69         struct dsc_compression_parameters_entry *dsc;
  70         struct list_head node;
  71 };
  72
  73 #define SLAVE_ADDR1     0x70
  74 #define SLAVE_ADDR2     0x72
  75
  76 /* Get BDB block size given a pointer to Block ID. */
  77 static u32 _get_blocksize(const u8 *block_base)
  78 {
  79         /* The MIPI Sequence Block v3+ has a separate size field. */
  80         if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
  81                 return *((const u32 *)(block_base + 4));
  82         else
  83                 return *((const u16 *)(block_base + 1));
  84 }
  85
  86 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
  87 static u32 get_blocksize(const void *block_data)
  88 {
  89         return _get_blocksize(block_data - 3);
  90 }
  91
  92 static const void *
  93 find_raw_section(const void *_bdb, enum bdb_block_id section_id)
  94 {
  95         const struct bdb_header *bdb = _bdb;
  96         const u8 *base = _bdb;
  97         int index = 0;
  98         u32 total, current_size;
  99         enum bdb_block_id current_id;
 100
 101         /* skip to first section */
 102         index += bdb->header_size;
 103         total = bdb->bdb_size;
 104
 105         /* walk the sections looking for section_id */
 106         while (index + 3 < total) {
 107                 current_id = *(base + index);
 108                 current_size = _get_blocksize(base + index);
 109                 index += 3;
 110
 111                 if (index + current_size > total)
 112                         return NULL;
 113
 114                 if (current_id == section_id)
 115                         return base + index;
 116
 117                 index += current_size;
 118         }
 119
 120         return NULL;
 121 }
 122
 123 /*
 124  * Offset from the start of BDB to the start of the
 125  * block data (just past the block header).
 126  */
 127 static u32 raw_block_offset(const void *bdb, enum bdb_block_id section_id)
 128 {
 129         const void *block;
 130
 131         block = find_raw_section(bdb, section_id);
 132         if (!block)
 133                 return 0;
 134
 135         return block - bdb;
 136 }
 137
 138 struct bdb_block_entry {
 139         struct list_head node;
 140         enum bdb_block_id section_id;
 141         u8 data[];
 142 };
 143
 144 static const void *
 145 find_section(struct drm_i915_private *i915,
 146              enum bdb_block_id section_id)
 147 {
 148         struct bdb_block_entry *entry;
 149
 150         list_for_each_entry(entry, &i915->display.vbt.bdb_blocks, node) {
 151                 if (entry->section_id == section_id)
 152                         return entry->data + 3;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 static const struct {
 159         enum bdb_block_id section_id;
 160         size_t min_size;
 161 } bdb_blocks[] = {
 162         { .section_id = BDB_GENERAL_FEATURES,
 163           .min_size = sizeof(struct bdb_general_features), },
 164         { .section_id = BDB_GENERAL_DEFINITIONS,
 165           .min_size = sizeof(struct bdb_general_definitions), },
 166         { .section_id = BDB_PSR,
 167           .min_size = sizeof(struct bdb_psr), },
 168         { .section_id = BDB_DRIVER_FEATURES,
 169           .min_size = sizeof(struct bdb_driver_features), },
 170         { .section_id = BDB_SDVO_LVDS_OPTIONS,
 171           .min_size = sizeof(struct bdb_sdvo_lvds_options), },
 172         { .section_id = BDB_SDVO_PANEL_DTDS,
 173           .min_size = sizeof(struct bdb_sdvo_panel_dtds), },
 174         { .section_id = BDB_EDP,
 175           .min_size = sizeof(struct bdb_edp), },
 176         { .section_id = BDB_LVDS_OPTIONS,
 177           .min_size = sizeof(struct bdb_lvds_options), },
 178         /*
 179          * BDB_LVDS_LFP_DATA depends on BDB_LVDS_LFP_DATA_PTRS,
 180          * so keep the two ordered.
 181          */
 182         { .section_id = BDB_LVDS_LFP_DATA_PTRS,
 183           .min_size = sizeof(struct bdb_lvds_lfp_data_ptrs), },
 184         { .section_id = BDB_LVDS_LFP_DATA,
 185           .min_size = 0, /* special case */ },
 186         { .section_id = BDB_LVDS_BACKLIGHT,
 187           .min_size = sizeof(struct bdb_lfp_backlight_data), },
 188         { .section_id = BDB_LFP_POWER,
 189           .min_size = sizeof(struct bdb_lfp_power), },
 190         { .section_id = BDB_MIPI_CONFIG,
 191           .min_size = sizeof(struct bdb_mipi_config), },
 192         { .section_id = BDB_MIPI_SEQUENCE,
 193           .min_size = sizeof(struct bdb_mipi_sequence) },
 194         { .section_id = BDB_COMPRESSION_PARAMETERS,
 195           .min_size = sizeof(struct bdb_compression_parameters), },
 196         { .section_id = BDB_GENERIC_DTD,
 197           .min_size = sizeof(struct bdb_generic_dtd), },
 198 };
 199
 200 static size_t lfp_data_min_size(struct drm_i915_private *i915)
 201 {
 202         const struct bdb_lvds_lfp_data_ptrs *ptrs;
 203         size_t size;
 204
 205         ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
 206         if (!ptrs)
 207                 return 0;
 208
 209         size = sizeof(struct bdb_lvds_lfp_data);
 210         if (ptrs->panel_name.table_size)
 211                 size = max(size, ptrs->panel_name.offset +
 212                            sizeof(struct bdb_lvds_lfp_data_tail));
 213
 214         return size;
 215 }
 216
 217 static bool validate_lfp_data_ptrs(const void *bdb,
 218                                    const struct bdb_lvds_lfp_data_ptrs *ptrs)
 219 {
 220         int fp_timing_size, dvo_timing_size, panel_pnp_id_size, panel_name_size;
 221         int data_block_size, lfp_data_size;
 222         const void *data_block;
 223         int i;
 224
 225         data_block = find_raw_section(bdb, BDB_LVDS_LFP_DATA);
 226         if (!data_block)
 227                 return false;
 228
 229         data_block_size = get_blocksize(data_block);
 230         if (data_block_size == 0)
 231                 return false;
 232
 233         /* always 3 indicating the presence of fp_timing+dvo_timing+panel_pnp_id */
 234         if (ptrs->lvds_entries != 3)
 235                 return false;
 236
 237         fp_timing_size = ptrs->ptr[0].fp_timing.table_size;
 238         dvo_timing_size = ptrs->ptr[0].dvo_timing.table_size;
 239         panel_pnp_id_size = ptrs->ptr[0].panel_pnp_id.table_size;
 240         panel_name_size = ptrs->panel_name.table_size;
 241
 242         /* fp_timing has variable size */
 243         if (fp_timing_size < 32 ||
 244             dvo_timing_size != sizeof(struct lvds_dvo_timing) ||
 245             panel_pnp_id_size != sizeof(struct lvds_pnp_id))
 246                 return false;
 247
 248         /* panel_name is not present in old VBTs */
 249         if (panel_name_size != 0 &&
 250             panel_name_size != sizeof(struct lvds_lfp_panel_name))
 251                 return false;
 252
 253         lfp_data_size = ptrs->ptr[1].fp_timing.offset - ptrs->ptr[0].fp_timing.offset;
 254         if (16 * lfp_data_size > data_block_size)
 255                 return false;
 256
 257         /* make sure the table entries have uniform size */
 258         for (i = 1; i < 16; i++) {
 259                 if (ptrs->ptr[i].fp_timing.table_size != fp_timing_size ||
 260                     ptrs->ptr[i].dvo_timing.table_size != dvo_timing_size ||
 261                     ptrs->ptr[i].panel_pnp_id.table_size != panel_pnp_id_size)
 262                         return false;
 263
 264                 if (ptrs->ptr[i].fp_timing.offset - ptrs->ptr[i-1].fp_timing.offset != lfp_data_size ||
 265                     ptrs->ptr[i].dvo_timing.offset - ptrs->ptr[i-1].dvo_timing.offset != lfp_data_size ||
 266                     ptrs->ptr[i].panel_pnp_id.offset - ptrs->ptr[i-1].panel_pnp_id.offset != lfp_data_size)
 267                         return false;
 268         }
 269
 270         /*
 271          * Except for vlv/chv machines all real VBTs seem to have 6
 272          * unaccounted bytes in the fp_timing table. And it doesn't
 273          * appear to be a really intentional hole as the fp_timing
 274          * 0xffff terminator is always within those 6 missing bytes.
 275          */
 276         if (fp_timing_size + 6 + dvo_timing_size + panel_pnp_id_size == lfp_data_size)
 277                 fp_timing_size += 6;
 278
 279         if (fp_timing_size + dvo_timing_size + panel_pnp_id_size != lfp_data_size)
 280                 return false;
 281
 282         if (ptrs->ptr[0].fp_timing.offset + fp_timing_size != ptrs->ptr[0].dvo_timing.offset ||
 283             ptrs->ptr[0].dvo_timing.offset + dvo_timing_size != ptrs->ptr[0].panel_pnp_id.offset ||
 284             ptrs->ptr[0].panel_pnp_id.offset + panel_pnp_id_size != lfp_data_size)
 285                 return false;
 286
 287         /* make sure the tables fit inside the data block */
 288         for (i = 0; i < 16; i++) {
 289                 if (ptrs->ptr[i].fp_timing.offset + fp_timing_size > data_block_size ||
 290                     ptrs->ptr[i].dvo_timing.offset + dvo_timing_size > data_block_size ||
 291                     ptrs->ptr[i].panel_pnp_id.offset + panel_pnp_id_size > data_block_size)
 292                         return false;
 293         }
 294
 295         if (ptrs->panel_name.offset + 16 * panel_name_size > data_block_size)
 296                 return false;
 297
 298         /* make sure fp_timing terminators are present at expected locations */
 299         for (i = 0; i < 16; i++) {
 300                 const u16 *t = data_block + ptrs->ptr[i].fp_timing.offset +
 301                         fp_timing_size - 2;
 302
 303                 if (*t != 0xffff)
 304                         return false;
 305         }
 306
 307         return true;
 308 }
 309
 310 /* make the data table offsets relative to the data block */
 311 static bool fixup_lfp_data_ptrs(const void *bdb, void *ptrs_block)
 312 {
 313         struct bdb_lvds_lfp_data_ptrs *ptrs = ptrs_block;
 314         u32 offset;
 315         int i;
 316
 317         offset = raw_block_offset(bdb, BDB_LVDS_LFP_DATA);
 318
 319         for (i = 0; i < 16; i++) {
 320                 if (ptrs->ptr[i].fp_timing.offset < offset ||
 321                     ptrs->ptr[i].dvo_timing.offset < offset ||
 322                     ptrs->ptr[i].panel_pnp_id.offset < offset)
 323                         return false;
 324
 325                 ptrs->ptr[i].fp_timing.offset -= offset;
 326                 ptrs->ptr[i].dvo_timing.offset -= offset;
 327                 ptrs->ptr[i].panel_pnp_id.offset -= offset;
 328         }
 329
 330         if (ptrs->panel_name.table_size) {
 331                 if (ptrs->panel_name.offset < offset)
 332                         return false;
 333
 334                 ptrs->panel_name.offset -= offset;
 335         }
 336
 337         return validate_lfp_data_ptrs(bdb, ptrs);
 338 }
 339
 340 static int make_lfp_data_ptr(struct lvds_lfp_data_ptr_table *table,
 341                              int table_size, int total_size)
 342 {
 343         if (total_size < table_size)
 344                 return total_size;
 345
 346         table->table_size = table_size;
 347         table->offset = total_size - table_size;
 348
 349         return total_size - table_size;
 350 }
 351
 352 static void next_lfp_data_ptr(struct lvds_lfp_data_ptr_table *next,
 353                               const struct lvds_lfp_data_ptr_table *prev,
 354                               int size)
 355 {
 356         next->table_size = prev->table_size;
 357         next->offset = prev->offset + size;
 358 }
 359
 360 static void *generate_lfp_data_ptrs(struct drm_i915_private *i915,
 361                                     const void *bdb)
 362 {
 363         int i, size, table_size, block_size, offset, fp_timing_size;
 364         struct bdb_lvds_lfp_data_ptrs *ptrs;
 365         const void *block;
 366         void *ptrs_block;
 367
 368         /*
 369          * The hardcoded fp_timing_size is only valid for
 370          * modernish VBTs. All older VBTs definitely should
 371          * include block 41 and thus we don't need to
 372          * generate one.
 373          */
 374         if (i915->display.vbt.version < 155)
 375                 return NULL;
 376
 377         fp_timing_size = 38;
 378
 379         block = find_raw_section(bdb, BDB_LVDS_LFP_DATA);
 380         if (!block)
 381                 return NULL;
 382
 383         drm_dbg_kms(&i915->drm, "Generating LFP data table pointers\n");
 384
 385         block_size = get_blocksize(block);
 386
 387         size = fp_timing_size + sizeof(struct lvds_dvo_timing) +
 388                 sizeof(struct lvds_pnp_id);
 389         if (size * 16 > block_size)
 390                 return NULL;
 391
 392         ptrs_block = kzalloc(sizeof(*ptrs) + 3, GFP_KERNEL);
 393         if (!ptrs_block)
 394                 return NULL;
 395
 396         *(u8 *)(ptrs_block + 0) = BDB_LVDS_LFP_DATA_PTRS;
 397         *(u16 *)(ptrs_block + 1) = sizeof(*ptrs);
 398         ptrs = ptrs_block + 3;
 399
 400         table_size = sizeof(struct lvds_pnp_id);
 401         size = make_lfp_data_ptr(&ptrs->ptr[0].panel_pnp_id, table_size, size);
 402
 403         table_size = sizeof(struct lvds_dvo_timing);
 404         size = make_lfp_data_ptr(&ptrs->ptr[0].dvo_timing, table_size, size);
 405
 406         table_size = fp_timing_size;
 407         size = make_lfp_data_ptr(&ptrs->ptr[0].fp_timing, table_size, size);
 408
 409         if (ptrs->ptr[0].fp_timing.table_size)
 410                 ptrs->lvds_entries++;
 411         if (ptrs->ptr[0].dvo_timing.table_size)
 412                 ptrs->lvds_entries++;
 413         if (ptrs->ptr[0].panel_pnp_id.table_size)
 414                 ptrs->lvds_entries++;
 415
 416         if (size != 0 || ptrs->lvds_entries != 3) {
 417                 kfree(ptrs_block);
 418                 return NULL;
 419         }
 420
 421         size = fp_timing_size + sizeof(struct lvds_dvo_timing) +
 422                 sizeof(struct lvds_pnp_id);
 423         for (i = 1; i < 16; i++) {
 424                 next_lfp_data_ptr(&ptrs->ptr[i].fp_timing, &ptrs->ptr[i-1].fp_timing, size);
 425                 next_lfp_data_ptr(&ptrs->ptr[i].dvo_timing, &ptrs->ptr[i-1].dvo_timing, size);
 426                 next_lfp_data_ptr(&ptrs->ptr[i].panel_pnp_id, &ptrs->ptr[i-1].panel_pnp_id, size);
 427         }
 428
 429         table_size = sizeof(struct lvds_lfp_panel_name);
 430
 431         if (16 * (size + table_size) <= block_size) {
 432                 ptrs->panel_name.table_size = table_size;
 433                 ptrs->panel_name.offset = size * 16;
 434         }
 435
 436         offset = block - bdb;
 437
 438         for (i = 0; i < 16; i++) {
 439                 ptrs->ptr[i].fp_timing.offset += offset;
 440                 ptrs->ptr[i].dvo_timing.offset += offset;
 441                 ptrs->ptr[i].panel_pnp_id.offset += offset;
 442         }
 443
 444         if (ptrs->panel_name.table_size)
 445                 ptrs->panel_name.offset += offset;
 446
 447         return ptrs_block;
 448 }
 449
 450 static void
 451 init_bdb_block(struct drm_i915_private *i915,
 452                const void *bdb, enum bdb_block_id section_id,
 453                size_t min_size)
 454 {
 455         struct bdb_block_entry *entry;
 456         void *temp_block = NULL;
 457         const void *block;
 458         size_t block_size;
 459
 460         block = find_raw_section(bdb, section_id);
 461
 462         /* Modern VBTs lack the LFP data table pointers block, make one up */
 463         if (!block && section_id == BDB_LVDS_LFP_DATA_PTRS) {
 464                 temp_block = generate_lfp_data_ptrs(i915, bdb);
 465                 if (temp_block)
 466                         block = temp_block + 3;
 467         }
 468         if (!block)
 469                 return;
 470
 471         drm_WARN(&i915->drm, min_size == 0,
 472                  "Block %d min_size is zero\n", section_id);
 473
 474         block_size = get_blocksize(block);
 475
 476         /*
 477          * Version number and new block size are considered
 478          * part of the header for MIPI sequenece block v3+.
 479          */
 480         if (section_id == BDB_MIPI_SEQUENCE && *(const u8 *)block >= 3)
 481                 block_size += 5;
 482
 483         entry = kzalloc(struct_size(entry, data, max(min_size, block_size) + 3),
 484                         GFP_KERNEL);
 485         if (!entry) {
 486                 kfree(temp_block);
 487                 return;
 488         }
 489
 490         entry->section_id = section_id;
 491         memcpy(entry->data, block - 3, block_size + 3);
 492
 493         kfree(temp_block);
 494
 495         drm_dbg_kms(&i915->drm, "Found BDB block %d (size %zu, min size %zu)\n",
 496                     section_id, block_size, min_size);
 497
 498         if (section_id == BDB_LVDS_LFP_DATA_PTRS &&
 499             !fixup_lfp_data_ptrs(bdb, entry->data + 3)) {
 500                 drm_err(&i915->drm, "VBT has malformed LFP data table pointers\n");
 501                 kfree(entry);
 502                 return;
 503         }
 504
 505         list_add_tail(&entry->node, &i915->display.vbt.bdb_blocks);
 506 }
 507
 508 static void init_bdb_blocks(struct drm_i915_private *i915,
 509                             const void *bdb)
 510 {
 511         int i;
 512
 513         for (i = 0; i < ARRAY_SIZE(bdb_blocks); i++) {
 514                 enum bdb_block_id section_id = bdb_blocks[i].section_id;
 515                 size_t min_size = bdb_blocks[i].min_size;
 516
 517                 if (section_id == BDB_LVDS_LFP_DATA)
 518                         min_size = lfp_data_min_size(i915);
 519
 520                 init_bdb_block(i915, bdb, section_id, min_size);
 521         }
 522 }
 523
 524 static void
 525 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
 526                         const struct lvds_dvo_timing *dvo_timing)
 527 {
 528         panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
 529                 dvo_timing->hactive_lo;
 530         panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
 531                 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
 532         panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
 533                 ((dvo_timing->hsync_pulse_width_hi << 8) |
 534                         dvo_timing->hsync_pulse_width_lo);
 535         panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
 536                 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
 537
 538         panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
 539                 dvo_timing->vactive_lo;
 540         panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
 541                 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
 542         panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
 543                 ((dvo_timing->vsync_pulse_width_hi << 4) |
 544                         dvo_timing->vsync_pulse_width_lo);
 545         panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
 546                 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
 547         panel_fixed_mode->clock = dvo_timing->clock * 10;
 548         panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
 549
 550         if (dvo_timing->hsync_positive)
 551                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
 552         else
 553                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
 554
 555         if (dvo_timing->vsync_positive)
 556                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
 557         else
 558                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
 559
 560         panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
 561                 dvo_timing->himage_lo;
 562         panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
 563                 dvo_timing->vimage_lo;
 564
 565         /* Some VBTs have bogus h/vtotal values */
 566         if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
 567                 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
 568         if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
 569                 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
 570
 571         drm_mode_set_name(panel_fixed_mode);
 572 }
 573
 574 static const struct lvds_dvo_timing *
 575 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *data,
 576                     const struct bdb_lvds_lfp_data_ptrs *ptrs,
 577                     int index)
 578 {
 579         return (const void *)data + ptrs->ptr[index].dvo_timing.offset;
 580 }
 581
 582 static const struct lvds_fp_timing *
 583 get_lvds_fp_timing(const struct bdb_lvds_lfp_data *data,
 584                    const struct bdb_lvds_lfp_data_ptrs *ptrs,
 585                    int index)
 586 {
 587         return (const void *)data + ptrs->ptr[index].fp_timing.offset;
 588 }
 589
 590 static const struct lvds_pnp_id *
 591 get_lvds_pnp_id(const struct bdb_lvds_lfp_data *data,
 592                 const struct bdb_lvds_lfp_data_ptrs *ptrs,
 593                 int index)
 594 {
 595         return (const void *)data + ptrs->ptr[index].panel_pnp_id.offset;
 596 }
 597
 598 static const struct bdb_lvds_lfp_data_tail *
 599 get_lfp_data_tail(const struct bdb_lvds_lfp_data *data,
 600                   const struct bdb_lvds_lfp_data_ptrs *ptrs)
 601 {
 602         if (ptrs->panel_name.table_size)
 603                 return (const void *)data + ptrs->panel_name.offset;
 604         else
 605                 return NULL;
 606 }
 607
 608 static void dump_pnp_id(struct drm_i915_private *i915,
 609                         const struct lvds_pnp_id *pnp_id,
 610                         const char *name)
 611 {
 612         u16 mfg_name = be16_to_cpu((__force __be16)pnp_id->mfg_name);
 613         char vend[4];
 614
 615         drm_dbg_kms(&i915->drm, "%s PNPID mfg: %s (0x%x), prod: %u, serial: %u, week: %d, year: %d\n",
 616                     name, drm_edid_decode_mfg_id(mfg_name, vend),
 617                     pnp_id->mfg_name, pnp_id->product_code, pnp_id->serial,
 618                     pnp_id->mfg_week, pnp_id->mfg_year + 1990);
 619 }
 620
 621 static int opregion_get_panel_type(struct drm_i915_private *i915,
 622                                    const struct intel_bios_encoder_data *devdata,
 623                                    const struct edid *edid, bool use_fallback)
 624 {
 625         return intel_opregion_get_panel_type(i915);
 626 }
 627
 628 static int vbt_get_panel_type(struct drm_i915_private *i915,
 629                               const struct intel_bios_encoder_data *devdata,
 630                               const struct edid *edid, bool use_fallback)
 631 {
 632         const struct bdb_lvds_options *lvds_options;
 633
 634         lvds_options = find_section(i915, BDB_LVDS_OPTIONS);
 635         if (!lvds_options)
 636                 return -1;
 637
 638         if (lvds_options->panel_type > 0xf &&
 639             lvds_options->panel_type != 0xff) {
 640                 drm_dbg_kms(&i915->drm, "Invalid VBT panel type 0x%x\n",
 641                             lvds_options->panel_type);
 642                 return -1;
 643         }
 644
 645         if (devdata && devdata->child.handle == DEVICE_HANDLE_LFP2)
 646                 return lvds_options->panel_type2;
 647
 648         drm_WARN_ON(&i915->drm, devdata && devdata->child.handle != DEVICE_HANDLE_LFP1);
 649
 650         return lvds_options->panel_type;
 651 }
 652
 653 static int pnpid_get_panel_type(struct drm_i915_private *i915,
 654                                 const struct intel_bios_encoder_data *devdata,
 655                                 const struct edid *edid, bool use_fallback)
 656 {
 657         const struct bdb_lvds_lfp_data *data;
 658         const struct bdb_lvds_lfp_data_ptrs *ptrs;
 659         const struct lvds_pnp_id *edid_id;
 660         struct lvds_pnp_id edid_id_nodate;
 661         int i, best = -1;
 662
 663         if (!edid)
 664                 return -1;
 665
 666         edid_id = (const void *)&edid->mfg_id[0];
 667
 668         edid_id_nodate = *edid_id;
 669         edid_id_nodate.mfg_week = 0;
 670         edid_id_nodate.mfg_year = 0;
 671
 672         dump_pnp_id(i915, edid_id, "EDID");
 673
 674         ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
 675         if (!ptrs)
 676                 return -1;
 677
 678         data = find_section(i915, BDB_LVDS_LFP_DATA);
 679         if (!data)
 680                 return -1;
 681
 682         for (i = 0; i < 16; i++) {
 683                 const struct lvds_pnp_id *vbt_id =
 684                         get_lvds_pnp_id(data, ptrs, i);
 685
 686                 /* full match? */
 687                 if (!memcmp(vbt_id, edid_id, sizeof(*vbt_id)))
 688                         return i;
 689
 690                 /*
 691                  * Accept a match w/o date if no full match is found,
 692                  * and the VBT entry does not specify a date.
 693                  */
 694                 if (best < 0 &&
 695                     !memcmp(vbt_id, &edid_id_nodate, sizeof(*vbt_id)))
 696                         best = i;
 697         }
 698
 699         return best;
 700 }
 701
 702 static int fallback_get_panel_type(struct drm_i915_private *i915,
 703                                    const struct intel_bios_encoder_data *devdata,
 704                                    const struct edid *edid, bool use_fallback)
 705 {
 706         return use_fallback ? 0 : -1;
 707 }
 708
 709 enum panel_type {
 710         PANEL_TYPE_OPREGION,
 711         PANEL_TYPE_VBT,
 712         PANEL_TYPE_PNPID,
 713         PANEL_TYPE_FALLBACK,
 714 };
 715
 716 static int get_panel_type(struct drm_i915_private *i915,
 717                           const struct intel_bios_encoder_data *devdata,
 718                           const struct edid *edid, bool use_fallback)
 719 {
 720         struct {
 721                 const char *name;
 722                 int (*get_panel_type)(struct drm_i915_private *i915,
 723                                       const struct intel_bios_encoder_data *devdata,
 724                                       const struct edid *edid, bool use_fallback);
 725                 int panel_type;
 726         } panel_types[] = {
 727                 [PANEL_TYPE_OPREGION] = {
 728                         .name = "OpRegion",
 729                         .get_panel_type = opregion_get_panel_type,
 730                 },
 731                 [PANEL_TYPE_VBT] = {
 732                         .name = "VBT",
 733                         .get_panel_type = vbt_get_panel_type,
 734                 },
 735                 [PANEL_TYPE_PNPID] = {
 736                         .name = "PNPID",
 737                         .get_panel_type = pnpid_get_panel_type,
 738                 },
 739                 [PANEL_TYPE_FALLBACK] = {
 740                         .name = "fallback",
 741                         .get_panel_type = fallback_get_panel_type,
 742                 },
 743         };
 744         int i;
 745
 746         for (i = 0; i < ARRAY_SIZE(panel_types); i++) {
 747                 panel_types[i].panel_type = panel_types[i].get_panel_type(i915, devdata,
 748                                                                           edid, use_fallback);
 749
 750                 drm_WARN_ON(&i915->drm, panel_types[i].panel_type > 0xf &&
 751                             panel_types[i].panel_type != 0xff);
 752
 753                 if (panel_types[i].panel_type >= 0)
 754                         drm_dbg_kms(&i915->drm, "Panel type (%s): %d\n",
 755                                     panel_types[i].name, panel_types[i].panel_type);
 756         }
 757
 758         if (panel_types[PANEL_TYPE_OPREGION].panel_type >= 0)
 759                 i = PANEL_TYPE_OPREGION;
 760         else if (panel_types[PANEL_TYPE_VBT].panel_type == 0xff &&
 761                  panel_types[PANEL_TYPE_PNPID].panel_type >= 0)
 762                 i = PANEL_TYPE_PNPID;
 763         else if (panel_types[PANEL_TYPE_VBT].panel_type != 0xff &&
 764                  panel_types[PANEL_TYPE_VBT].panel_type >= 0)
 765                 i = PANEL_TYPE_VBT;
 766         else
 767                 i = PANEL_TYPE_FALLBACK;
 768
 769         drm_dbg_kms(&i915->drm, "Selected panel type (%s): %d\n",
 770                     panel_types[i].name, panel_types[i].panel_type);
 771
 772         return panel_types[i].panel_type;
 773 }
 774
 775 static unsigned int panel_bits(unsigned int value, int panel_type, int num_bits)
 776 {
 777         return (value >> (panel_type * num_bits)) & (BIT(num_bits) - 1);
 778 }
 779
 780 static bool panel_bool(unsigned int value, int panel_type)
 781 {
 782         return panel_bits(value, panel_type, 1);
 783 }
 784
 785 /* Parse general panel options */
 786 static void
 787 parse_panel_options(struct drm_i915_private *i915,
 788                     struct intel_panel *panel)
 789 {
 790         const struct bdb_lvds_options *lvds_options;
 791         int panel_type = panel->vbt.panel_type;
 792         int drrs_mode;
 793
 794         lvds_options = find_section(i915, BDB_LVDS_OPTIONS);
 795         if (!lvds_options)
 796                 return;
 797
 798         panel->vbt.lvds_dither = lvds_options->pixel_dither;
 799
 800         /*
 801          * Empirical evidence indicates the block size can be
 802          * either 4,14,16,24+ bytes. For older VBTs no clear
 803          * relationship between the block size vs. BDB version.
 804          */
 805         if (get_blocksize(lvds_options) < 16)
 806                 return;
 807
 808         drrs_mode = panel_bits(lvds_options->dps_panel_type_bits,
 809                                panel_type, 2);
 810         /*
 811          * VBT has static DRRS = 0 and seamless DRRS = 2.
 812          * The below piece of code is required to adjust vbt.drrs_type
 813          * to match the enum drrs_support_type.
 814          */
 815         switch (drrs_mode) {
 816         case 0:
 817                 panel->vbt.drrs_type = DRRS_TYPE_STATIC;
 818                 drm_dbg_kms(&i915->drm, "DRRS supported mode is static\n");
 819                 break;
 820         case 2:
 821                 panel->vbt.drrs_type = DRRS_TYPE_SEAMLESS;
 822                 drm_dbg_kms(&i915->drm,
 823                             "DRRS supported mode is seamless\n");
 824                 break;
 825         default:
 826                 panel->vbt.drrs_type = DRRS_TYPE_NONE;
 827                 drm_dbg_kms(&i915->drm,
 828                             "DRRS not supported (VBT input)\n");
 829                 break;
 830         }
 831 }
 832
 833 static void
 834 parse_lfp_panel_dtd(struct drm_i915_private *i915,
 835                     struct intel_panel *panel,
 836                     const struct bdb_lvds_lfp_data *lvds_lfp_data,
 837                     const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs)
 838 {
 839         const struct lvds_dvo_timing *panel_dvo_timing;
 840         const struct lvds_fp_timing *fp_timing;
 841         struct drm_display_mode *panel_fixed_mode;
 842         int panel_type = panel->vbt.panel_type;
 843
 844         panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
 845                                                lvds_lfp_data_ptrs,
 846                                                panel_type);
 847
 848         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 849         if (!panel_fixed_mode)
 850                 return;
 851
 852         fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
 853
 854         panel->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
 855
 856         drm_dbg_kms(&i915->drm,
 857                     "Found panel mode in BIOS VBT legacy lfp table: " DRM_MODE_FMT "\n",
 858                     DRM_MODE_ARG(panel_fixed_mode));
 859
 860         fp_timing = get_lvds_fp_timing(lvds_lfp_data,
 861                                        lvds_lfp_data_ptrs,
 862                                        panel_type);
 863
 864         /* check the resolution, just to be sure */
 865         if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
 866             fp_timing->y_res == panel_fixed_mode->vdisplay) {
 867                 panel->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
 868                 drm_dbg_kms(&i915->drm,
 869                             "VBT initial LVDS value %x\n",
 870                             panel->vbt.bios_lvds_val);
 871         }
 872 }
 873
 874 static void
 875 parse_lfp_data(struct drm_i915_private *i915,
 876                struct intel_panel *panel)
 877 {
 878         const struct bdb_lvds_lfp_data *data;
 879         const struct bdb_lvds_lfp_data_tail *tail;
 880         const struct bdb_lvds_lfp_data_ptrs *ptrs;
 881         const struct lvds_pnp_id *pnp_id;
 882         int panel_type = panel->vbt.panel_type;
 883
 884         ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
 885         if (!ptrs)
 886                 return;
 887
 888         data = find_section(i915, BDB_LVDS_LFP_DATA);
 889         if (!data)
 890                 return;
 891
 892         if (!panel->vbt.lfp_lvds_vbt_mode)
 893                 parse_lfp_panel_dtd(i915, panel, data, ptrs);
 894
 895         pnp_id = get_lvds_pnp_id(data, ptrs, panel_type);
 896         dump_pnp_id(i915, pnp_id, "Panel");
 897
 898         tail = get_lfp_data_tail(data, ptrs);
 899         if (!tail)
 900                 return;
 901
 902         drm_dbg_kms(&i915->drm, "Panel name: %.*s\n",
 903                     (int)sizeof(tail->panel_name[0].name),
 904                     tail->panel_name[panel_type].name);
 905
 906         if (i915->display.vbt.version >= 188) {
 907                 panel->vbt.seamless_drrs_min_refresh_rate =
 908                         tail->seamless_drrs_min_refresh_rate[panel_type];
 909                 drm_dbg_kms(&i915->drm,
 910                             "Seamless DRRS min refresh rate: %d Hz\n",
 911                             panel->vbt.seamless_drrs_min_refresh_rate);
 912         }
 913 }
 914
 915 static void
 916 parse_generic_dtd(struct drm_i915_private *i915,
 917                   struct intel_panel *panel)
 918 {
 919         const struct bdb_generic_dtd *generic_dtd;
 920         const struct generic_dtd_entry *dtd;
 921         struct drm_display_mode *panel_fixed_mode;
 922         int num_dtd;
 923
 924         /*
 925          * Older VBTs provided DTD information for internal displays through
 926          * the "LFP panel tables" block (42).  As of VBT revision 229 the
 927          * DTD information should be provided via a newer "generic DTD"
 928          * block (58).  Just to be safe, we'll try the new generic DTD block
 929          * first on VBT >= 229, but still fall back to trying the old LFP
 930          * block if that fails.
 931          */
 932         if (i915->display.vbt.version < 229)
 933                 return;
 934
 935         generic_dtd = find_section(i915, BDB_GENERIC_DTD);
 936         if (!generic_dtd)
 937                 return;
 938
 939         if (generic_dtd->gdtd_size < sizeof(struct generic_dtd_entry)) {
 940                 drm_err(&i915->drm, "GDTD size %u is too small.\n",
 941                         generic_dtd->gdtd_size);
 942                 return;
 943         } else if (generic_dtd->gdtd_size !=
 944                    sizeof(struct generic_dtd_entry)) {
 945                 drm_err(&i915->drm, "Unexpected GDTD size %u\n",
 946                         generic_dtd->gdtd_size);
 947                 /* DTD has unknown fields, but keep going */
 948         }
 949
 950         num_dtd = (get_blocksize(generic_dtd) -
 951                    sizeof(struct bdb_generic_dtd)) / generic_dtd->gdtd_size;
 952         if (panel->vbt.panel_type >= num_dtd) {
 953                 drm_err(&i915->drm,
 954                         "Panel type %d not found in table of %d DTD's\n",
 955                         panel->vbt.panel_type, num_dtd);
 956                 return;
 957         }
 958
 959         dtd = &generic_dtd->dtd[panel->vbt.panel_type];
 960
 961         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 962         if (!panel_fixed_mode)
 963                 return;
 964
 965         panel_fixed_mode->hdisplay = dtd->hactive;
 966         panel_fixed_mode->hsync_start =
 967                 panel_fixed_mode->hdisplay + dtd->hfront_porch;
 968         panel_fixed_mode->hsync_end =
 969                 panel_fixed_mode->hsync_start + dtd->hsync;
 970         panel_fixed_mode->htotal =
 971                 panel_fixed_mode->hdisplay + dtd->hblank;
 972
 973         panel_fixed_mode->vdisplay = dtd->vactive;
 974         panel_fixed_mode->vsync_start =
 975                 panel_fixed_mode->vdisplay + dtd->vfront_porch;
 976         panel_fixed_mode->vsync_end =
 977                 panel_fixed_mode->vsync_start + dtd->vsync;
 978         panel_fixed_mode->vtotal =
 979                 panel_fixed_mode->vdisplay + dtd->vblank;
 980
 981         panel_fixed_mode->clock = dtd->pixel_clock;
 982         panel_fixed_mode->width_mm = dtd->width_mm;
 983         panel_fixed_mode->height_mm = dtd->height_mm;
 984
 985         panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
 986         drm_mode_set_name(panel_fixed_mode);
 987
 988         if (dtd->hsync_positive_polarity)
 989                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
 990         else
 991                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
 992
 993         if (dtd->vsync_positive_polarity)
 994                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
 995         else
 996                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
 997
 998         drm_dbg_kms(&i915->drm,
 999                     "Found panel mode in BIOS VBT generic dtd table: " DRM_MODE_FMT "\n",
1000                     DRM_MODE_ARG(panel_fixed_mode));
1001
1002         panel->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
1003 }
1004
1005 static void
1006 parse_lfp_backlight(struct drm_i915_private *i915,
1007                     struct intel_panel *panel)
1008 {
1009         const struct bdb_lfp_backlight_data *backlight_data;
1010         const struct lfp_backlight_data_entry *entry;
1011         int panel_type = panel->vbt.panel_type;
1012         u16 level;
1013
1014         backlight_data = find_section(i915, BDB_LVDS_BACKLIGHT);
1015         if (!backlight_data)
1016                 return;
1017
1018         if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
1019                 drm_dbg_kms(&i915->drm,
1020                             "Unsupported backlight data entry size %u\n",
1021                             backlight_data->entry_size);
1022                 return;
1023         }
1024
1025         entry = &backlight_data->data[panel_type];
1026
1027         panel->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
1028         if (!panel->vbt.backlight.present) {
1029                 drm_dbg_kms(&i915->drm,
1030                             "PWM backlight not present in VBT (type %u)\n",
1031                             entry->type);
1032                 return;
1033         }
1034
1035         panel->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
1036         if (i915->display.vbt.version >= 191) {
1037                 size_t exp_size;
1038
1039                 if (i915->display.vbt.version >= 236)
1040                         exp_size = sizeof(struct bdb_lfp_backlight_data);
1041                 else if (i915->display.vbt.version >= 234)
1042                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_234;
1043                 else
1044                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_191;
1045
1046                 if (get_blocksize(backlight_data) >= exp_size) {
1047                         const struct lfp_backlight_control_method *method;
1048
1049                         method = &backlight_data->backlight_control[panel_type];
1050                         panel->vbt.backlight.type = method->type;
1051                         panel->vbt.backlight.controller = method->controller;
1052                 }
1053         }
1054
1055         panel->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
1056         panel->vbt.backlight.active_low_pwm = entry->active_low_pwm;
1057
1058         if (i915->display.vbt.version >= 234) {
1059                 u16 min_level;
1060                 bool scale;
1061
1062                 level = backlight_data->brightness_level[panel_type].level;
1063                 min_level = backlight_data->brightness_min_level[panel_type].level;
1064
1065                 if (i915->display.vbt.version >= 236)
1066                         scale = backlight_data->brightness_precision_bits[panel_type] == 16;
1067                 else
1068                         scale = level > 255;
1069
1070                 if (scale)
1071                         min_level = min_level / 255;
1072
1073                 if (min_level > 255) {
1074                         drm_warn(&i915->drm, "Brightness min level > 255\n");
1075                         level = 255;
1076                 }
1077                 panel->vbt.backlight.min_brightness = min_level;
1078
1079                 panel->vbt.backlight.brightness_precision_bits =
1080                         backlight_data->brightness_precision_bits[panel_type];
1081         } else {
1082                 level = backlight_data->level[panel_type];
1083                 panel->vbt.backlight.min_brightness = entry->min_brightness;
1084         }
1085
1086         drm_dbg_kms(&i915->drm,
1087                     "VBT backlight PWM modulation frequency %u Hz, "
1088                     "active %s, min brightness %u, level %u, controller %u\n",
1089                     panel->vbt.backlight.pwm_freq_hz,
1090                     panel->vbt.backlight.active_low_pwm ? "low" : "high",
1091                     panel->vbt.backlight.min_brightness,
1092                     level,
1093                     panel->vbt.backlight.controller);
1094 }
1095
1096 /* Try to find sdvo panel data */
1097 static void
1098 parse_sdvo_panel_data(struct drm_i915_private *i915,
1099                       struct intel_panel *panel)
1100 {
1101         const struct bdb_sdvo_panel_dtds *dtds;
1102         struct drm_display_mode *panel_fixed_mode;
1103         int index;
1104
1105         index = i915->params.vbt_sdvo_panel_type;
1106         if (index == -2) {
1107                 drm_dbg_kms(&i915->drm,
1108                             "Ignore SDVO panel mode from BIOS VBT tables.\n");
1109                 return;
1110         }
1111
1112         if (index == -1) {
1113                 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
1114
1115                 sdvo_lvds_options = find_section(i915, BDB_SDVO_LVDS_OPTIONS);
1116                 if (!sdvo_lvds_options)
1117                         return;
1118
1119                 index = sdvo_lvds_options->panel_type;
1120         }
1121
1122         dtds = find_section(i915, BDB_SDVO_PANEL_DTDS);
1123         if (!dtds)
1124                 return;
1125
1126         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
1127         if (!panel_fixed_mode)
1128                 return;
1129
1130         fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]);
1131
1132         panel->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
1133
1134         drm_dbg_kms(&i915->drm,
1135                     "Found SDVO panel mode in BIOS VBT tables: " DRM_MODE_FMT "\n",
1136                     DRM_MODE_ARG(panel_fixed_mode));
1137 }
1138
1139 static int intel_bios_ssc_frequency(struct drm_i915_private *i915,
1140                                     bool alternate)
1141 {
1142         switch (DISPLAY_VER(i915)) {
1143         case 2:
1144                 return alternate ? 66667 : 48000;
1145         case 3:
1146         case 4:
1147                 return alternate ? 100000 : 96000;
1148         default:
1149                 return alternate ? 100000 : 120000;
1150         }
1151 }
1152
1153 static void
1154 parse_general_features(struct drm_i915_private *i915)
1155 {
1156         const struct bdb_general_features *general;
1157
1158         general = find_section(i915, BDB_GENERAL_FEATURES);
1159         if (!general)
1160                 return;
1161
1162         i915->display.vbt.int_tv_support = general->int_tv_support;
1163         /* int_crt_support can't be trusted on earlier platforms */
1164         if (i915->display.vbt.version >= 155 &&
1165             (HAS_DDI(i915) || IS_VALLEYVIEW(i915)))
1166                 i915->display.vbt.int_crt_support = general->int_crt_support;
1167         i915->display.vbt.lvds_use_ssc = general->enable_ssc;
1168         i915->display.vbt.lvds_ssc_freq =
1169                 intel_bios_ssc_frequency(i915, general->ssc_freq);
1170         i915->display.vbt.display_clock_mode = general->display_clock_mode;
1171         i915->display.vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
1172         if (i915->display.vbt.version >= 181) {
1173                 i915->display.vbt.orientation = general->rotate_180 ?
1174                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
1175                         DRM_MODE_PANEL_ORIENTATION_NORMAL;
1176         } else {
1177                 i915->display.vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
1178         }
1179
1180         if (i915->display.vbt.version >= 249 && general->afc_startup_config) {
1181                 i915->display.vbt.override_afc_startup = true;
1182                 i915->display.vbt.override_afc_startup_val = general->afc_startup_config == 0x1 ? 0x0 : 0x7;
1183         }
1184
1185         drm_dbg_kms(&i915->drm,
1186                     "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",
1187                     i915->display.vbt.int_tv_support,
1188                     i915->display.vbt.int_crt_support,
1189                     i915->display.vbt.lvds_use_ssc,
1190                     i915->display.vbt.lvds_ssc_freq,
1191                     i915->display.vbt.display_clock_mode,
1192                     i915->display.vbt.fdi_rx_polarity_inverted);
1193 }
1194
1195 static const struct child_device_config *
1196 child_device_ptr(const struct bdb_general_definitions *defs, int i)
1197 {
1198         return (const void *) &defs->devices[i * defs->child_dev_size];
1199 }
1200
1201 static void
1202 parse_sdvo_device_mapping(struct drm_i915_private *i915)
1203 {
1204         struct sdvo_device_mapping *mapping;
1205         const struct intel_bios_encoder_data *devdata;
1206         const struct child_device_config *child;
1207         int count = 0;
1208
1209         /*
1210          * Only parse SDVO mappings on gens that could have SDVO. This isn't
1211          * accurate and doesn't have to be, as long as it's not too strict.
1212          */
1213         if (!IS_DISPLAY_VER(i915, 3, 7)) {
1214                 drm_dbg_kms(&i915->drm, "Skipping SDVO device mapping\n");
1215                 return;
1216         }
1217
1218         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
1219                 child = &devdata->child;
1220
1221                 if (child->slave_addr != SLAVE_ADDR1 &&
1222                     child->slave_addr != SLAVE_ADDR2) {
1223                         /*
1224                          * If the slave address is neither 0x70 nor 0x72,
1225                          * it is not a SDVO device. Skip it.
1226                          */
1227                         continue;
1228                 }
1229                 if (child->dvo_port != DEVICE_PORT_DVOB &&
1230                     child->dvo_port != DEVICE_PORT_DVOC) {
1231                         /* skip the incorrect SDVO port */
1232                         drm_dbg_kms(&i915->drm,
1233                                     "Incorrect SDVO port. Skip it\n");
1234                         continue;
1235                 }
1236                 drm_dbg_kms(&i915->drm,
1237                             "the SDVO device with slave addr %2x is found on"
1238                             " %s port\n",
1239                             child->slave_addr,
1240                             (child->dvo_port == DEVICE_PORT_DVOB) ?
1241                             "SDVOB" : "SDVOC");
1242                 mapping = &i915->display.vbt.sdvo_mappings[child->dvo_port - 1];
1243                 if (!mapping->initialized) {
1244                         mapping->dvo_port = child->dvo_port;
1245                         mapping->slave_addr = child->slave_addr;
1246                         mapping->dvo_wiring = child->dvo_wiring;
1247                         mapping->ddc_pin = child->ddc_pin;
1248                         mapping->i2c_pin = child->i2c_pin;
1249                         mapping->initialized = 1;
1250                         drm_dbg_kms(&i915->drm,
1251                                     "SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
1252                                     mapping->dvo_port, mapping->slave_addr,
1253                                     mapping->dvo_wiring, mapping->ddc_pin,
1254                                     mapping->i2c_pin);
1255                 } else {
1256                         drm_dbg_kms(&i915->drm,
1257                                     "Maybe one SDVO port is shared by "
1258                                     "two SDVO device.\n");
1259                 }
1260                 if (child->slave2_addr) {
1261                         /* Maybe this is a SDVO device with multiple inputs */
1262                         /* And the mapping info is not added */
1263                         drm_dbg_kms(&i915->drm,
1264                                     "there exists the slave2_addr. Maybe this"
1265                                     " is a SDVO device with multiple inputs.\n");
1266                 }
1267                 count++;
1268         }
1269
1270         if (!count) {
1271                 /* No SDVO device info is found */
1272                 drm_dbg_kms(&i915->drm,
1273                             "No SDVO device info is found in VBT\n");
1274         }
1275 }
1276
1277 static void
1278 parse_driver_features(struct drm_i915_private *i915)
1279 {
1280         const struct bdb_driver_features *driver;
1281
1282         driver = find_section(i915, BDB_DRIVER_FEATURES);
1283         if (!driver)
1284                 return;
1285
1286         if (DISPLAY_VER(i915) >= 5) {
1287                 /*
1288                  * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
1289                  * to mean "eDP". The VBT spec doesn't agree with that
1290                  * interpretation, but real world VBTs seem to.
1291                  */
1292                 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
1293                         i915->display.vbt.int_lvds_support = 0;
1294         } else {
1295                 /*
1296                  * FIXME it's not clear which BDB version has the LVDS config
1297                  * bits defined. Revision history in the VBT spec says:
1298                  * "0.92 | Add two definitions for VBT value of LVDS Active
1299                  *  Config (00b and 11b values defined) | 06/13/2005"
1300                  * but does not the specify the BDB version.
1301                  *
1302                  * So far version 134 (on i945gm) is the oldest VBT observed
1303                  * in the wild with the bits correctly populated. Version
1304                  * 108 (on i85x) does not have the bits correctly populated.
1305                  */
1306                 if (i915->display.vbt.version >= 134 &&
1307                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
1308                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
1309                         i915->display.vbt.int_lvds_support = 0;
1310         }
1311 }
1312
1313 static void
1314 parse_panel_driver_features(struct drm_i915_private *i915,
1315                             struct intel_panel *panel)
1316 {
1317         const struct bdb_driver_features *driver;
1318
1319         driver = find_section(i915, BDB_DRIVER_FEATURES);
1320         if (!driver)
1321                 return;
1322
1323         if (i915->display.vbt.version < 228) {
1324                 drm_dbg_kms(&i915->drm, "DRRS State Enabled:%d\n",
1325                             driver->drrs_enabled);
1326                 /*
1327                  * If DRRS is not supported, drrs_type has to be set to 0.
1328                  * This is because, VBT is configured in such a way that
1329                  * static DRRS is 0 and DRRS not supported is represented by
1330                  * driver->drrs_enabled=false
1331                  */
1332                 if (!driver->drrs_enabled && panel->vbt.drrs_type != DRRS_TYPE_NONE) {
1333                         /*
1334                          * FIXME Should DMRRS perhaps be treated as seamless
1335                          * but without the automatic downclocking?
1336                          */
1337                         if (driver->dmrrs_enabled)
1338                                 panel->vbt.drrs_type = DRRS_TYPE_STATIC;
1339                         else
1340                                 panel->vbt.drrs_type = DRRS_TYPE_NONE;
1341                 }
1342
1343                 panel->vbt.psr.enable = driver->psr_enabled;
1344         }
1345 }
1346
1347 static void
1348 parse_power_conservation_features(struct drm_i915_private *i915,
1349                                   struct intel_panel *panel)
1350 {
1351         const struct bdb_lfp_power *power;
1352         u8 panel_type = panel->vbt.panel_type;
1353
1354         panel->vbt.vrr = true; /* matches Windows behaviour */
1355
1356         if (i915->display.vbt.version < 228)
1357                 return;
1358
1359         power = find_section(i915, BDB_LFP_POWER);
1360         if (!power)
1361                 return;
1362
1363         panel->vbt.psr.enable = panel_bool(power->psr, panel_type);
1364
1365         /*
1366          * If DRRS is not supported, drrs_type has to be set to 0.
1367          * This is because, VBT is configured in such a way that
1368          * static DRRS is 0 and DRRS not supported is represented by
1369          * power->drrs & BIT(panel_type)=false
1370          */
1371         if (!panel_bool(power->drrs, panel_type) && panel->vbt.drrs_type != DRRS_TYPE_NONE) {
1372                 /*
1373                  * FIXME Should DMRRS perhaps be treated as seamless
1374                  * but without the automatic downclocking?
1375                  */
1376                 if (panel_bool(power->dmrrs, panel_type))
1377                         panel->vbt.drrs_type = DRRS_TYPE_STATIC;
1378                 else
1379                         panel->vbt.drrs_type = DRRS_TYPE_NONE;
1380         }
1381
1382         if (i915->display.vbt.version >= 232)
1383                 panel->vbt.edp.hobl = panel_bool(power->hobl, panel_type);
1384
1385         if (i915->display.vbt.version >= 233)
1386                 panel->vbt.vrr = panel_bool(power->vrr_feature_enabled,
1387                                             panel_type);
1388 }
1389
1390 static void
1391 parse_edp(struct drm_i915_private *i915,
1392           struct intel_panel *panel)
1393 {
1394         const struct bdb_edp *edp;
1395         const struct edp_power_seq *edp_pps;
1396         const struct edp_fast_link_params *edp_link_params;
1397         int panel_type = panel->vbt.panel_type;
1398
1399         edp = find_section(i915, BDB_EDP);
1400         if (!edp)
1401                 return;
1402
1403         switch (panel_bits(edp->color_depth, panel_type, 2)) {
1404         case EDP_18BPP:
1405                 panel->vbt.edp.bpp = 18;
1406                 break;
1407         case EDP_24BPP:
1408                 panel->vbt.edp.bpp = 24;
1409                 break;
1410         case EDP_30BPP:
1411                 panel->vbt.edp.bpp = 30;
1412                 break;
1413         }
1414
1415         /* Get the eDP sequencing and link info */
1416         edp_pps = &edp->power_seqs[panel_type];
1417         edp_link_params = &edp->fast_link_params[panel_type];
1418
1419         panel->vbt.edp.pps = *edp_pps;
1420
1421         if (i915->display.vbt.version >= 224) {
1422                 panel->vbt.edp.rate =
1423                         edp->edp_fast_link_training_rate[panel_type] * 20;
1424         } else {
1425                 switch (edp_link_params->rate) {
1426                 case EDP_RATE_1_62:
1427                         panel->vbt.edp.rate = 162000;
1428                         break;
1429                 case EDP_RATE_2_7:
1430                         panel->vbt.edp.rate = 270000;
1431                         break;
1432                 case EDP_RATE_5_4:
1433                         panel->vbt.edp.rate = 540000;
1434                         break;
1435                 default:
1436                         drm_dbg_kms(&i915->drm,
1437                                     "VBT has unknown eDP link rate value %u\n",
1438                                     edp_link_params->rate);
1439                         break;
1440                 }
1441         }
1442
1443         switch (edp_link_params->lanes) {
1444         case EDP_LANE_1:
1445                 panel->vbt.edp.lanes = 1;
1446                 break;
1447         case EDP_LANE_2:
1448                 panel->vbt.edp.lanes = 2;
1449                 break;
1450         case EDP_LANE_4:
1451                 panel->vbt.edp.lanes = 4;
1452                 break;
1453         default:
1454                 drm_dbg_kms(&i915->drm,
1455                             "VBT has unknown eDP lane count value %u\n",
1456                             edp_link_params->lanes);
1457                 break;
1458         }
1459
1460         switch (edp_link_params->preemphasis) {
1461         case EDP_PREEMPHASIS_NONE:
1462                 panel->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
1463                 break;
1464         case EDP_PREEMPHASIS_3_5dB:
1465                 panel->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
1466                 break;
1467         case EDP_PREEMPHASIS_6dB:
1468                 panel->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
1469                 break;
1470         case EDP_PREEMPHASIS_9_5dB:
1471                 panel->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
1472                 break;
1473         default:
1474                 drm_dbg_kms(&i915->drm,
1475                             "VBT has unknown eDP pre-emphasis value %u\n",
1476                             edp_link_params->preemphasis);
1477                 break;
1478         }
1479
1480         switch (edp_link_params->vswing) {
1481         case EDP_VSWING_0_4V:
1482                 panel->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
1483                 break;
1484         case EDP_VSWING_0_6V:
1485                 panel->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
1486                 break;
1487         case EDP_VSWING_0_8V:
1488                 panel->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
1489                 break;
1490         case EDP_VSWING_1_2V:
1491                 panel->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
1492                 break;
1493         default:
1494                 drm_dbg_kms(&i915->drm,
1495                             "VBT has unknown eDP voltage swing value %u\n",
1496                             edp_link_params->vswing);
1497                 break;
1498         }
1499
1500         if (i915->display.vbt.version >= 173) {
1501                 u8 vswing;
1502
1503                 /* Don't read from VBT if module parameter has valid value*/
1504                 if (i915->params.edp_vswing) {
1505                         panel->vbt.edp.low_vswing =
1506                                 i915->params.edp_vswing == 1;
1507                 } else {
1508                         vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
1509                         panel->vbt.edp.low_vswing = vswing == 0;
1510                 }
1511         }
1512
1513         panel->vbt.edp.drrs_msa_timing_delay =
1514                 panel_bits(edp->sdrrs_msa_timing_delay, panel_type, 2);
1515
1516         if (i915->display.vbt.version >= 244)
1517                 panel->vbt.edp.max_link_rate =
1518                         edp->edp_max_port_link_rate[panel_type] * 20;
1519 }
1520
1521 static void
1522 parse_psr(struct drm_i915_private *i915,
1523           struct intel_panel *panel)
1524 {
1525         const struct bdb_psr *psr;
1526         const struct psr_table *psr_table;
1527         int panel_type = panel->vbt.panel_type;
1528
1529         psr = find_section(i915, BDB_PSR);
1530         if (!psr) {
1531                 drm_dbg_kms(&i915->drm, "No PSR BDB found.\n");
1532                 return;
1533         }
1534
1535         psr_table = &psr->psr_table[panel_type];
1536
1537         panel->vbt.psr.full_link = psr_table->full_link;
1538         panel->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
1539
1540         /* Allowed VBT values goes from 0 to 15 */
1541         panel->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
1542                 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
1543
1544         /*
1545          * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
1546          * Old decimal value is wake up time in multiples of 100 us.
1547          */
1548         if (i915->display.vbt.version >= 205 &&
1549             (DISPLAY_VER(i915) >= 9 && !IS_BROXTON(i915))) {
1550                 switch (psr_table->tp1_wakeup_time) {
1551                 case 0:
1552                         panel->vbt.psr.tp1_wakeup_time_us = 500;
1553                         break;
1554                 case 1:
1555                         panel->vbt.psr.tp1_wakeup_time_us = 100;
1556                         break;
1557                 case 3:
1558                         panel->vbt.psr.tp1_wakeup_time_us = 0;
1559                         break;
1560                 default:
1561                         drm_dbg_kms(&i915->drm,
1562                                     "VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
1563                                     psr_table->tp1_wakeup_time);
1564                         fallthrough;
1565                 case 2:
1566                         panel->vbt.psr.tp1_wakeup_time_us = 2500;
1567                         break;
1568                 }
1569
1570                 switch (psr_table->tp2_tp3_wakeup_time) {
1571                 case 0:
1572                         panel->vbt.psr.tp2_tp3_wakeup_time_us = 500;
1573                         break;
1574                 case 1:
1575                         panel->vbt.psr.tp2_tp3_wakeup_time_us = 100;
1576                         break;
1577                 case 3:
1578                         panel->vbt.psr.tp2_tp3_wakeup_time_us = 0;
1579                         break;
1580                 default:
1581                         drm_dbg_kms(&i915->drm,
1582                                     "VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
1583                                     psr_table->tp2_tp3_wakeup_time);
1584                         fallthrough;
1585                 case 2:
1586                         panel->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
1587                 break;
1588                 }
1589         } else {
1590                 panel->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
1591                 panel->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
1592         }
1593
1594         if (i915->display.vbt.version >= 226) {
1595                 u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time;
1596
1597                 wakeup_time = panel_bits(wakeup_time, panel_type, 2);
1598                 switch (wakeup_time) {
1599                 case 0:
1600                         wakeup_time = 500;
1601                         break;
1602                 case 1:
1603                         wakeup_time = 100;
1604                         break;
1605                 case 3:
1606                         wakeup_time = 50;
1607                         break;
1608                 default:
1609                 case 2:
1610                         wakeup_time = 2500;
1611                         break;
1612                 }
1613                 panel->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time;
1614         } else {
1615                 /* Reusing PSR1 wakeup time for PSR2 in older VBTs */
1616                 panel->vbt.psr.psr2_tp2_tp3_wakeup_time_us = panel->vbt.psr.tp2_tp3_wakeup_time_us;
1617         }
1618 }
1619
1620 static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
1621                                       struct intel_panel *panel,
1622                                       enum port port)
1623 {
1624         enum port port_bc = DISPLAY_VER(i915) >= 11 ? PORT_B : PORT_C;
1625
1626         if (!panel->vbt.dsi.config->dual_link || i915->display.vbt.version < 197) {
1627                 panel->vbt.dsi.bl_ports = BIT(port);
1628                 if (panel->vbt.dsi.config->cabc_supported)
1629                         panel->vbt.dsi.cabc_ports = BIT(port);
1630
1631                 return;
1632         }
1633
1634         switch (panel->vbt.dsi.config->dl_dcs_backlight_ports) {
1635         case DL_DCS_PORT_A:
1636                 panel->vbt.dsi.bl_ports = BIT(PORT_A);
1637                 break;
1638         case DL_DCS_PORT_C:
1639                 panel->vbt.dsi.bl_ports = BIT(port_bc);
1640                 break;
1641         default:
1642         case DL_DCS_PORT_A_AND_C:
1643                 panel->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(port_bc);
1644                 break;
1645         }
1646
1647         if (!panel->vbt.dsi.config->cabc_supported)
1648                 return;
1649
1650         switch (panel->vbt.dsi.config->dl_dcs_cabc_ports) {
1651         case DL_DCS_PORT_A:
1652                 panel->vbt.dsi.cabc_ports = BIT(PORT_A);
1653                 break;
1654         case DL_DCS_PORT_C:
1655                 panel->vbt.dsi.cabc_ports = BIT(port_bc);
1656                 break;
1657         default:
1658         case DL_DCS_PORT_A_AND_C:
1659                 panel->vbt.dsi.cabc_ports =
1660                                         BIT(PORT_A) | BIT(port_bc);
1661                 break;
1662         }
1663 }
1664
1665 static void
1666 parse_mipi_config(struct drm_i915_private *i915,
1667                   struct intel_panel *panel)
1668 {
1669         const struct bdb_mipi_config *start;
1670         const struct mipi_config *config;
1671         const struct mipi_pps_data *pps;
1672         int panel_type = panel->vbt.panel_type;
1673         enum port port;
1674
1675         /* parse MIPI blocks only if LFP type is MIPI */
1676         if (!intel_bios_is_dsi_present(i915, &port))
1677                 return;
1678
1679         /* Initialize this to undefined indicating no generic MIPI support */
1680         panel->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
1681
1682         /* Block #40 is already parsed and panel_fixed_mode is
1683          * stored in i915->lfp_lvds_vbt_mode
1684          * resuse this when needed
1685          */
1686
1687         /* Parse #52 for panel index used from panel_type already
1688          * parsed
1689          */
1690         start = find_section(i915, BDB_MIPI_CONFIG);
1691         if (!start) {
1692                 drm_dbg_kms(&i915->drm, "No MIPI config BDB found");
1693                 return;
1694         }
1695
1696         drm_dbg(&i915->drm, "Found MIPI Config block, panel index = %d\n",
1697                 panel_type);
1698
1699         /*
1700          * get hold of the correct configuration block and pps data as per
1701          * the panel_type as index
1702          */
1703         config = &start->config[panel_type];
1704         pps = &start->pps[panel_type];
1705
1706         /* store as of now full data. Trim when we realise all is not needed */
1707         panel->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
1708         if (!panel->vbt.dsi.config)
1709                 return;
1710
1711         panel->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
1712         if (!panel->vbt.dsi.pps) {
1713                 kfree(panel->vbt.dsi.config);
1714                 return;
1715         }
1716
1717         parse_dsi_backlight_ports(i915, panel, port);
1718
1719         /* FIXME is the 90 vs. 270 correct? */
1720         switch (config->rotation) {
1721         case ENABLE_ROTATION_0:
1722                 /*
1723                  * Most (all?) VBTs claim 0 degrees despite having
1724                  * an upside down panel, thus we do not trust this.
1725                  */
1726                 panel->vbt.dsi.orientation =
1727                         DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
1728                 break;
1729         case ENABLE_ROTATION_90:
1730                 panel->vbt.dsi.orientation =
1731                         DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
1732                 break;
1733         case ENABLE_ROTATION_180:
1734                 panel->vbt.dsi.orientation =
1735                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
1736                 break;
1737         case ENABLE_ROTATION_270:
1738                 panel->vbt.dsi.orientation =
1739                         DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
1740                 break;
1741         }
1742
1743         /* We have mandatory mipi config blocks. Initialize as generic panel */
1744         panel->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
1745 }
1746
1747 /* Find the sequence block and size for the given panel. */
1748 static const u8 *
1749 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
1750                           u16 panel_id, u32 *seq_size)
1751 {
1752         u32 total = get_blocksize(sequence);
1753         const u8 *data = &sequence->data[0];
1754         u8 current_id;
1755         u32 current_size;
1756         int header_size = sequence->version >= 3 ? 5 : 3;
1757         int index = 0;
1758         int i;
1759
1760         /* skip new block size */
1761         if (sequence->version >= 3)
1762                 data += 4;
1763
1764         for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
1765                 if (index + header_size > total) {
1766                         DRM_ERROR("Invalid sequence block (header)\n");
1767                         return NULL;
1768                 }
1769
1770                 current_id = *(data + index);
1771                 if (sequence->version >= 3)
1772                         current_size = *((const u32 *)(data + index + 1));
1773                 else
1774                         current_size = *((const u16 *)(data + index + 1));
1775
1776                 index += header_size;
1777
1778                 if (index + current_size > total) {
1779                         DRM_ERROR("Invalid sequence block\n");
1780                         return NULL;
1781                 }
1782
1783                 if (current_id == panel_id) {
1784                         *seq_size = current_size;
1785                         return data + index;
1786                 }
1787
1788                 index += current_size;
1789         }
1790
1791         DRM_ERROR("Sequence block detected but no valid configuration\n");
1792
1793         return NULL;
1794 }
1795
1796 static int goto_next_sequence(const u8 *data, int index, int total)
1797 {
1798         u16 len;
1799
1800         /* Skip Sequence Byte. */
1801         for (index = index + 1; index < total; index += len) {
1802                 u8 operation_byte = *(data + index);
1803                 index++;
1804
1805                 switch (operation_byte) {
1806                 case MIPI_SEQ_ELEM_END:
1807                         return index;
1808                 case MIPI_SEQ_ELEM_SEND_PKT:
1809                         if (index + 4 > total)
1810                                 return 0;
1811
1812                         len = *((const u16 *)(data + index + 2)) + 4;
1813                         break;
1814                 case MIPI_SEQ_ELEM_DELAY:
1815                         len = 4;
1816                         break;
1817                 case MIPI_SEQ_ELEM_GPIO:
1818                         len = 2;
1819                         break;
1820                 case MIPI_SEQ_ELEM_I2C:
1821                         if (index + 7 > total)
1822                                 return 0;
1823                         len = *(data + index + 6) + 7;
1824                         break;
1825                 default:
1826                         DRM_ERROR("Unknown operation byte\n");
1827                         return 0;
1828                 }
1829         }
1830
1831         return 0;
1832 }
1833
1834 static int goto_next_sequence_v3(const u8 *data, int index, int total)
1835 {
1836         int seq_end;
1837         u16 len;
1838         u32 size_of_sequence;
1839
1840         /*
1841          * Could skip sequence based on Size of Sequence alone, but also do some
1842          * checking on the structure.
1843          */
1844         if (total < 5) {
1845                 DRM_ERROR("Too small sequence size\n");
1846                 return 0;
1847         }
1848
1849         /* Skip Sequence Byte. */
1850         index++;
1851
1852         /*
1853          * Size of Sequence. Excludes the Sequence Byte and the size itself,
1854          * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
1855          * byte.
1856          */
1857         size_of_sequence = *((const u32 *)(data + index));
1858         index += 4;
1859
1860         seq_end = index + size_of_sequence;
1861         if (seq_end > total) {
1862                 DRM_ERROR("Invalid sequence size\n");
1863                 return 0;
1864         }
1865
1866         for (; index < total; index += len) {
1867                 u8 operation_byte = *(data + index);
1868                 index++;
1869
1870                 if (operation_byte == MIPI_SEQ_ELEM_END) {
1871                         if (index != seq_end) {
1872                                 DRM_ERROR("Invalid element structure\n");
1873                                 return 0;
1874                         }
1875                         return index;
1876                 }
1877
1878                 len = *(data + index);
1879                 index++;
1880
1881                 /*
1882                  * FIXME: Would be nice to check elements like for v1/v2 in
1883                  * goto_next_sequence() above.
1884                  */
1885                 switch (operation_byte) {
1886                 case MIPI_SEQ_ELEM_SEND_PKT:
1887                 case MIPI_SEQ_ELEM_DELAY:
1888                 case MIPI_SEQ_ELEM_GPIO:
1889                 case MIPI_SEQ_ELEM_I2C:
1890                 case MIPI_SEQ_ELEM_SPI:
1891                 case MIPI_SEQ_ELEM_PMIC:
1892                         break;
1893                 default:
1894                         DRM_ERROR("Unknown operation byte %u\n",
1895                                   operation_byte);
1896                         break;
1897                 }
1898         }
1899
1900         return 0;
1901 }
1902
1903 /*
1904  * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
1905  * skip all delay + gpio operands and stop at the first DSI packet op.
1906  */
1907 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *i915,
1908                                               struct intel_panel *panel)
1909 {
1910         const u8 *data = panel->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1911         int index, len;
1912
1913         if (drm_WARN_ON(&i915->drm,
1914                         !data || panel->vbt.dsi.seq_version != 1))
1915                 return 0;
1916
1917         /* index = 1 to skip sequence byte */
1918         for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
1919                 switch (data[index]) {
1920                 case MIPI_SEQ_ELEM_SEND_PKT:
1921                         return index == 1 ? 0 : index;
1922                 case MIPI_SEQ_ELEM_DELAY:
1923                         len = 5; /* 1 byte for operand + uint32 */
1924                         break;
1925                 case MIPI_SEQ_ELEM_GPIO:
1926                         len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
1927                         break;
1928                 default:
1929                         return 0;
1930                 }
1931         }
1932
1933         return 0;
1934 }
1935
1936 /*
1937  * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
1938  * The deassert must be done before calling intel_dsi_device_ready, so for
1939  * these devices we split the init OTP sequence into a deassert sequence and
1940  * the actual init OTP part.
1941  */
1942 static void fixup_mipi_sequences(struct drm_i915_private *i915,
1943                                  struct intel_panel *panel)
1944 {
1945         u8 *init_otp;
1946         int len;
1947
1948         /* Limit this to VLV for now. */
1949         if (!IS_VALLEYVIEW(i915))
1950                 return;
1951
1952         /* Limit this to v1 vid-mode sequences */
1953         if (panel->vbt.dsi.config->is_cmd_mode ||
1954             panel->vbt.dsi.seq_version != 1)
1955                 return;
1956
1957         /* Only do this if there are otp and assert seqs and no deassert seq */
1958         if (!panel->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1959             !panel->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1960             panel->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1961                 return;
1962
1963         /* The deassert-sequence ends at the first DSI packet */
1964         len = get_init_otp_deassert_fragment_len(i915, panel);
1965         if (!len)
1966                 return;
1967
1968         drm_dbg_kms(&i915->drm,
1969                     "Using init OTP fragment to deassert reset\n");
1970
1971         /* Copy the fragment, update seq byte and terminate it */
1972         init_otp = (u8 *)panel->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1973         panel->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1974         if (!panel->vbt.dsi.deassert_seq)
1975                 return;
1976         panel->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1977         panel->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1978         /* Use the copy for deassert */
1979         panel->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1980                 panel->vbt.dsi.deassert_seq;
1981         /* Replace the last byte of the fragment with init OTP seq byte */
1982         init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1983         /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1984         panel->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1985 }
1986
1987 static void
1988 parse_mipi_sequence(struct drm_i915_private *i915,
1989                     struct intel_panel *panel)
1990 {
1991         int panel_type = panel->vbt.panel_type;
1992         const struct bdb_mipi_sequence *sequence;
1993         const u8 *seq_data;
1994         u32 seq_size;
1995         u8 *data;
1996         int index = 0;
1997
1998         /* Only our generic panel driver uses the sequence block. */
1999         if (panel->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
2000                 return;
2001
2002         sequence = find_section(i915, BDB_MIPI_SEQUENCE);
2003         if (!sequence) {
2004                 drm_dbg_kms(&i915->drm,
2005                             "No MIPI Sequence found, parsing complete\n");
2006                 return;
2007         }
2008
2009         /* Fail gracefully for forward incompatible sequence block. */
2010         if (sequence->version >= 4) {
2011                 drm_err(&i915->drm,
2012                         "Unable to parse MIPI Sequence Block v%u\n",
2013                         sequence->version);
2014                 return;
2015         }
2016
2017         drm_dbg(&i915->drm, "Found MIPI sequence block v%u\n",
2018                 sequence->version);
2019
2020         seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
2021         if (!seq_data)
2022                 return;
2023
2024         data = kmemdup(seq_data, seq_size, GFP_KERNEL);
2025         if (!data)
2026                 return;
2027
2028         /* Parse the sequences, store pointers to each sequence. */
2029         for (;;) {
2030                 u8 seq_id = *(data + index);
2031                 if (seq_id == MIPI_SEQ_END)
2032                         break;
2033
2034                 if (seq_id >= MIPI_SEQ_MAX) {
2035                         drm_err(&i915->drm, "Unknown sequence %u\n",
2036                                 seq_id);
2037                         goto err;
2038                 }
2039
2040                 /* Log about presence of sequences we won't run. */
2041                 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
2042                         drm_dbg_kms(&i915->drm,
2043                                     "Unsupported sequence %u\n", seq_id);
2044
2045                 panel->vbt.dsi.sequence[seq_id] = data + index;
2046
2047                 if (sequence->version >= 3)
2048                         index = goto_next_sequence_v3(data, index, seq_size);
2049                 else
2050                         index = goto_next_sequence(data, index, seq_size);
2051                 if (!index) {
2052                         drm_err(&i915->drm, "Invalid sequence %u\n",
2053                                 seq_id);
2054                         goto err;
2055                 }
2056         }
2057
2058         panel->vbt.dsi.data = data;
2059         panel->vbt.dsi.size = seq_size;
2060         panel->vbt.dsi.seq_version = sequence->version;
2061
2062         fixup_mipi_sequences(i915, panel);
2063
2064         drm_dbg(&i915->drm, "MIPI related VBT parsing complete\n");
2065         return;
2066
2067 err:
2068         kfree(data);
2069         memset(panel->vbt.dsi.sequence, 0, sizeof(panel->vbt.dsi.sequence));
2070 }
2071
2072 static void
2073 parse_compression_parameters(struct drm_i915_private *i915)
2074 {
2075         const struct bdb_compression_parameters *params;
2076         struct intel_bios_encoder_data *devdata;
2077         const struct child_device_config *child;
2078         u16 block_size;
2079         int index;
2080
2081         if (i915->display.vbt.version < 198)
2082                 return;
2083
2084         params = find_section(i915, BDB_COMPRESSION_PARAMETERS);
2085         if (params) {
2086                 /* Sanity checks */
2087                 if (params->entry_size != sizeof(params->data[0])) {
2088                         drm_dbg_kms(&i915->drm,
2089                                     "VBT: unsupported compression param entry size\n");
2090                         return;
2091                 }
2092
2093                 block_size = get_blocksize(params);
2094                 if (block_size < sizeof(*params)) {
2095                         drm_dbg_kms(&i915->drm,
2096                                     "VBT: expected 16 compression param entries\n");
2097                         return;
2098                 }
2099         }
2100
2101         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
2102                 child = &devdata->child;
2103
2104                 if (!child->compression_enable)
2105                         continue;
2106
2107                 if (!params) {
2108                         drm_dbg_kms(&i915->drm,
2109                                     "VBT: compression params not available\n");
2110                         continue;
2111                 }
2112
2113                 if (child->compression_method_cps) {
2114                         drm_dbg_kms(&i915->drm,
2115                                     "VBT: CPS compression not supported\n");
2116                         continue;
2117                 }
2118
2119                 index = child->compression_structure_index;
2120
2121                 devdata->dsc = kmemdup(&params->data[index],
2122                                        sizeof(*devdata->dsc), GFP_KERNEL);
2123         }
2124 }
2125
2126 static u8 translate_iboost(u8 val)
2127 {
2128         static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
2129
2130         if (val >= ARRAY_SIZE(mapping)) {
2131                 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
2132                 return 0;
2133         }
2134         return mapping[val];
2135 }
2136
2137 static const u8 cnp_ddc_pin_map[] = {
2138         [0] = 0, /* N/A */
2139         [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
2140         [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
2141         [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
2142         [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
2143 };
2144
2145 static const u8 icp_ddc_pin_map[] = {
2146         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2147         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2148         [TGL_DDC_BUS_DDI_C] = GMBUS_PIN_3_BXT,
2149         [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
2150         [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
2151         [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
2152         [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
2153         [TGL_DDC_BUS_PORT_5] = GMBUS_PIN_13_TC5_TGP,
2154         [TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
2155 };
2156
2157 static const u8 rkl_pch_tgp_ddc_pin_map[] = {
2158         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2159         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2160         [RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
2161         [RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
2162 };
2163
2164 static const u8 adls_ddc_pin_map[] = {
2165         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2166         [ADLS_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
2167         [ADLS_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
2168         [ADLS_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
2169         [ADLS_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
2170 };
2171
2172 static const u8 gen9bc_tgp_ddc_pin_map[] = {
2173         [DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2174         [DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
2175         [DDC_BUS_DDI_D] = GMBUS_PIN_10_TC2_ICP,
2176 };
2177
2178 static const u8 adlp_ddc_pin_map[] = {
2179         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2180         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2181         [ADLP_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
2182         [ADLP_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
2183         [ADLP_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
2184         [ADLP_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
2185 };
2186
2187 static u8 map_ddc_pin(struct drm_i915_private *i915, u8 vbt_pin)
2188 {
2189         const u8 *ddc_pin_map;
2190         int n_entries;
2191
2192         if (HAS_PCH_MTP(i915) || IS_ALDERLAKE_P(i915)) {
2193                 ddc_pin_map = adlp_ddc_pin_map;
2194                 n_entries = ARRAY_SIZE(adlp_ddc_pin_map);
2195         } else if (IS_ALDERLAKE_S(i915)) {
2196                 ddc_pin_map = adls_ddc_pin_map;
2197                 n_entries = ARRAY_SIZE(adls_ddc_pin_map);
2198         } else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) {
2199                 return vbt_pin;
2200         } else if (IS_ROCKETLAKE(i915) && INTEL_PCH_TYPE(i915) == PCH_TGP) {
2201                 ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
2202                 n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
2203         } else if (HAS_PCH_TGP(i915) && DISPLAY_VER(i915) == 9) {
2204                 ddc_pin_map = gen9bc_tgp_ddc_pin_map;
2205                 n_entries = ARRAY_SIZE(gen9bc_tgp_ddc_pin_map);
2206         } else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) {
2207                 ddc_pin_map = icp_ddc_pin_map;
2208                 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
2209         } else if (HAS_PCH_CNP(i915)) {
2210                 ddc_pin_map = cnp_ddc_pin_map;
2211                 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
2212         } else {
2213                 /* Assuming direct map */
2214                 return vbt_pin;
2215         }
2216
2217         if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
2218                 return ddc_pin_map[vbt_pin];
2219
2220         drm_dbg_kms(&i915->drm,
2221                     "Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
2222                     vbt_pin);
2223         return 0;
2224 }
2225
2226 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
2227 {
2228         const struct intel_bios_encoder_data *devdata;
2229         enum port port;
2230
2231         if (!ddc_pin)
2232                 return PORT_NONE;
2233
2234         for_each_port(port) {
2235                 devdata = i915->display.vbt.ports[port];
2236
2237                 if (devdata && ddc_pin == devdata->child.ddc_pin)
2238                         return port;
2239         }
2240
2241         return PORT_NONE;
2242 }
2243
2244 static void sanitize_ddc_pin(struct intel_bios_encoder_data *devdata,
2245                              enum port port)
2246 {
2247         struct drm_i915_private *i915 = devdata->i915;
2248         struct child_device_config *child;
2249         u8 mapped_ddc_pin;
2250         enum port p;
2251
2252         if (!devdata->child.ddc_pin)
2253                 return;
2254
2255         mapped_ddc_pin = map_ddc_pin(i915, devdata->child.ddc_pin);
2256         if (!intel_gmbus_is_valid_pin(i915, mapped_ddc_pin)) {
2257                 drm_dbg_kms(&i915->drm,
2258                             "Port %c has invalid DDC pin %d, "
2259                             "sticking to defaults\n",
2260                             port_name(port), mapped_ddc_pin);
2261                 devdata->child.ddc_pin = 0;
2262                 return;
2263         }
2264
2265         p = get_port_by_ddc_pin(i915, devdata->child.ddc_pin);
2266         if (p == PORT_NONE)
2267                 return;
2268
2269         drm_dbg_kms(&i915->drm,
2270                     "port %c trying to use the same DDC pin (0x%x) as port %c, "
2271                     "disabling port %c DVI/HDMI support\n",
2272                     port_name(port), mapped_ddc_pin,
2273                     port_name(p), port_name(p));
2274
2275         /*
2276          * If we have multiple ports supposedly sharing the pin, then dvi/hdmi
2277          * couldn't exist on the shared port. Otherwise they share the same ddc
2278          * pin and system couldn't communicate with them separately.
2279          *
2280          * Give inverse child device order the priority, last one wins. Yes,
2281          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
2282          * port A and port E with the same AUX ch and we must pick port E :(
2283          */
2284         child = &i915->display.vbt.ports[p]->child;
2285
2286         child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
2287         child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
2288
2289         child->ddc_pin = 0;
2290 }
2291
2292 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
2293 {
2294         const struct intel_bios_encoder_data *devdata;
2295         enum port port;
2296
2297         if (!aux_ch)
2298                 return PORT_NONE;
2299
2300         for_each_port(port) {
2301                 devdata = i915->display.vbt.ports[port];
2302
2303                 if (devdata && aux_ch == devdata->child.aux_channel)
2304                         return port;
2305         }
2306
2307         return PORT_NONE;
2308 }
2309
2310 static void sanitize_aux_ch(struct intel_bios_encoder_data *devdata,
2311                             enum port port)
2312 {
2313         struct drm_i915_private *i915 = devdata->i915;
2314         struct child_device_config *child;
2315         enum port p;
2316
2317         p = get_port_by_aux_ch(i915, devdata->child.aux_channel);
2318         if (p == PORT_NONE)
2319                 return;
2320
2321         drm_dbg_kms(&i915->drm,
2322                     "port %c trying to use the same AUX CH (0x%x) as port %c, "
2323                     "disabling port %c DP support\n",
2324                     port_name(port), devdata->child.aux_channel,
2325                     port_name(p), port_name(p));
2326
2327         /*
2328          * If we have multiple ports supposedly sharing the aux channel, then DP
2329          * couldn't exist on the shared port. Otherwise they share the same aux
2330          * channel and system couldn't communicate with them separately.
2331          *
2332          * Give inverse child device order the priority, last one wins. Yes,
2333          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
2334          * port A and port E with the same AUX ch and we must pick port E :(
2335          */
2336         child = &i915->display.vbt.ports[p]->child;
2337
2338         child->device_type &= ~DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2339         child->aux_channel = 0;
2340 }
2341
2342 static u8 dvo_port_type(u8 dvo_port)
2343 {
2344         switch (dvo_port) {
2345         case DVO_PORT_HDMIA:
2346         case DVO_PORT_HDMIB:
2347         case DVO_PORT_HDMIC:
2348         case DVO_PORT_HDMID:
2349         case DVO_PORT_HDMIE:
2350         case DVO_PORT_HDMIF:
2351         case DVO_PORT_HDMIG:
2352         case DVO_PORT_HDMIH:
2353         case DVO_PORT_HDMII:
2354                 return DVO_PORT_HDMIA;
2355         case DVO_PORT_DPA:
2356         case DVO_PORT_DPB:
2357         case DVO_PORT_DPC:
2358         case DVO_PORT_DPD:
2359         case DVO_PORT_DPE:
2360         case DVO_PORT_DPF:
2361         case DVO_PORT_DPG:
2362         case DVO_PORT_DPH:
2363         case DVO_PORT_DPI:
2364                 return DVO_PORT_DPA;
2365         case DVO_PORT_MIPIA:
2366         case DVO_PORT_MIPIB:
2367         case DVO_PORT_MIPIC:
2368         case DVO_PORT_MIPID:
2369                 return DVO_PORT_MIPIA;
2370         default:
2371                 return dvo_port;
2372         }
2373 }
2374
2375 static enum port __dvo_port_to_port(int n_ports, int n_dvo,
2376                                     const int port_mapping[][3], u8 dvo_port)
2377 {
2378         enum port port;
2379         int i;
2380
2381         for (port = PORT_A; port < n_ports; port++) {
2382                 for (i = 0; i < n_dvo; i++) {
2383                         if (port_mapping[port][i] == -1)
2384                                 break;
2385
2386                         if (dvo_port == port_mapping[port][i])
2387                                 return port;
2388                 }
2389         }
2390
2391         return PORT_NONE;
2392 }
2393
2394 static enum port dvo_port_to_port(struct drm_i915_private *i915,
2395                                   u8 dvo_port)
2396 {
2397         /*
2398          * Each DDI port can have more than one value on the "DVO Port" field,
2399          * so look for all the possible values for each port.
2400          */
2401         static const int port_mapping[][3] = {
2402                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2403                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2404                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2405                 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2406                 [PORT_E] = { DVO_PORT_HDMIE, DVO_PORT_DPE, DVO_PORT_CRT },
2407                 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
2408                 [PORT_G] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
2409                 [PORT_H] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
2410                 [PORT_I] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
2411         };
2412         /*
2413          * RKL VBT uses PHY based mapping. Combo PHYs A,B,C,D
2414          * map to DDI A,B,TC1,TC2 respectively.
2415          */
2416         static const int rkl_port_mapping[][3] = {
2417                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2418                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2419                 [PORT_C] = { -1 },
2420                 [PORT_TC1] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2421                 [PORT_TC2] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2422         };
2423         /*
2424          * Alderlake S ports used in the driver are PORT_A, PORT_D, PORT_E,
2425          * PORT_F and PORT_G, we need to map that to correct VBT sections.
2426          */
2427         static const int adls_port_mapping[][3] = {
2428                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2429                 [PORT_B] = { -1 },
2430                 [PORT_C] = { -1 },
2431                 [PORT_TC1] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2432                 [PORT_TC2] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2433                 [PORT_TC3] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2434                 [PORT_TC4] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
2435         };
2436         static const int xelpd_port_mapping[][3] = {
2437                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2438                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2439                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2440                 [PORT_D_XELPD] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2441                 [PORT_E_XELPD] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
2442                 [PORT_TC1] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
2443                 [PORT_TC2] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
2444                 [PORT_TC3] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
2445                 [PORT_TC4] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
2446         };
2447
2448         if (DISPLAY_VER(i915) >= 13)
2449                 return __dvo_port_to_port(ARRAY_SIZE(xelpd_port_mapping),
2450                                           ARRAY_SIZE(xelpd_port_mapping[0]),
2451                                           xelpd_port_mapping,
2452                                           dvo_port);
2453         else if (IS_ALDERLAKE_S(i915))
2454                 return __dvo_port_to_port(ARRAY_SIZE(adls_port_mapping),
2455                                           ARRAY_SIZE(adls_port_mapping[0]),
2456                                           adls_port_mapping,
2457                                           dvo_port);
2458         else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2459                 return __dvo_port_to_port(ARRAY_SIZE(rkl_port_mapping),
2460                                           ARRAY_SIZE(rkl_port_mapping[0]),
2461                                           rkl_port_mapping,
2462                                           dvo_port);
2463         else
2464                 return __dvo_port_to_port(ARRAY_SIZE(port_mapping),
2465                                           ARRAY_SIZE(port_mapping[0]),
2466                                           port_mapping,
2467                                           dvo_port);
2468 }
2469
2470 static int parse_bdb_230_dp_max_link_rate(const int vbt_max_link_rate)
2471 {
2472         switch (vbt_max_link_rate) {
2473         default:
2474         case BDB_230_VBT_DP_MAX_LINK_RATE_DEF:
2475                 return 0;
2476         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20:
2477                 return 2000000;
2478         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5:
2479                 return 1350000;
2480         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10:
2481                 return 1000000;
2482         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3:
2483                 return 810000;
2484         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2:
2485                 return 540000;
2486         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR:
2487                 return 270000;
2488         case BDB_230_VBT_DP_MAX_LINK_RATE_LBR:
2489                 return 162000;
2490         }
2491 }
2492
2493 static int parse_bdb_216_dp_max_link_rate(const int vbt_max_link_rate)
2494 {
2495         switch (vbt_max_link_rate) {
2496         default:
2497         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3:
2498                 return 810000;
2499         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2:
2500                 return 540000;
2501         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR:
2502                 return 270000;
2503         case BDB_216_VBT_DP_MAX_LINK_RATE_LBR:
2504                 return 162000;
2505         }
2506 }
2507
2508 static int _intel_bios_dp_max_link_rate(const struct intel_bios_encoder_data *devdata)
2509 {
2510         if (!devdata || devdata->i915->display.vbt.version < 216)
2511                 return 0;
2512
2513         if (devdata->i915->display.vbt.version >= 230)
2514                 return parse_bdb_230_dp_max_link_rate(devdata->child.dp_max_link_rate);
2515         else
2516                 return parse_bdb_216_dp_max_link_rate(devdata->child.dp_max_link_rate);
2517 }
2518
2519 static int _intel_bios_dp_max_lane_count(const struct intel_bios_encoder_data *devdata)
2520 {
2521         if (!devdata || devdata->i915->display.vbt.version < 244)
2522                 return 0;
2523
2524         return devdata->child.dp_max_lane_count + 1;
2525 }
2526
2527 static void sanitize_device_type(struct intel_bios_encoder_data *devdata,
2528                                  enum port port)
2529 {
2530         struct drm_i915_private *i915 = devdata->i915;
2531         bool is_hdmi;
2532
2533         if (port != PORT_A || DISPLAY_VER(i915) >= 12)
2534                 return;
2535
2536         if (!intel_bios_encoder_supports_dvi(devdata))
2537                 return;
2538
2539         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
2540
2541         drm_dbg_kms(&i915->drm, "VBT claims port A supports DVI%s, ignoring\n",
2542                     is_hdmi ? "/HDMI" : "");
2543
2544         devdata->child.device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
2545         devdata->child.device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
2546 }
2547
2548 static bool
2549 intel_bios_encoder_supports_crt(const struct intel_bios_encoder_data *devdata)
2550 {
2551         return devdata->child.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
2552 }
2553
2554 bool
2555 intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata)
2556 {
2557         return devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
2558 }
2559
2560 bool
2561 intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata)
2562 {
2563         return intel_bios_encoder_supports_dvi(devdata) &&
2564                 (devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
2565 }
2566
2567 bool
2568 intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata)
2569 {
2570         return devdata->child.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2571 }
2572
2573 static bool
2574 intel_bios_encoder_supports_edp(const struct intel_bios_encoder_data *devdata)
2575 {
2576         return intel_bios_encoder_supports_dp(devdata) &&
2577                 devdata->child.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR;
2578 }
2579
2580 static int _intel_bios_hdmi_level_shift(const struct intel_bios_encoder_data *devdata)
2581 {
2582         if (!devdata || devdata->i915->display.vbt.version < 158)
2583                 return -1;
2584
2585         return devdata->child.hdmi_level_shifter_value;
2586 }
2587
2588 static int _intel_bios_max_tmds_clock(const struct intel_bios_encoder_data *devdata)
2589 {
2590         if (!devdata || devdata->i915->display.vbt.version < 204)
2591                 return 0;
2592
2593         switch (devdata->child.hdmi_max_data_rate) {
2594         default:
2595                 MISSING_CASE(devdata->child.hdmi_max_data_rate);
2596                 fallthrough;
2597         case HDMI_MAX_DATA_RATE_PLATFORM:
2598                 return 0;
2599         case HDMI_MAX_DATA_RATE_594:
2600                 return 594000;
2601         case HDMI_MAX_DATA_RATE_340:
2602                 return 340000;
2603         case HDMI_MAX_DATA_RATE_300:
2604                 return 300000;
2605         case HDMI_MAX_DATA_RATE_297:
2606                 return 297000;
2607         case HDMI_MAX_DATA_RATE_165:
2608                 return 165000;
2609         }
2610 }
2611
2612 static bool is_port_valid(struct drm_i915_private *i915, enum port port)
2613 {
2614         /*
2615          * On some ICL SKUs port F is not present, but broken VBTs mark
2616          * the port as present. Only try to initialize port F for the
2617          * SKUs that may actually have it.
2618          */
2619         if (port == PORT_F && IS_ICELAKE(i915))
2620                 return IS_ICL_WITH_PORT_F(i915);
2621
2622         return true;
2623 }
2624
2625 static void print_ddi_port(const struct intel_bios_encoder_data *devdata,
2626                            enum port port)
2627 {
2628         struct drm_i915_private *i915 = devdata->i915;
2629         const struct child_device_config *child = &devdata->child;
2630         bool is_dvi, is_hdmi, is_dp, is_edp, is_crt, supports_typec_usb, supports_tbt;
2631         int dp_boost_level, dp_max_link_rate, hdmi_boost_level, hdmi_level_shift, max_tmds_clock;
2632
2633         is_dvi = intel_bios_encoder_supports_dvi(devdata);
2634         is_dp = intel_bios_encoder_supports_dp(devdata);
2635         is_crt = intel_bios_encoder_supports_crt(devdata);
2636         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
2637         is_edp = intel_bios_encoder_supports_edp(devdata);
2638
2639         supports_typec_usb = intel_bios_encoder_supports_typec_usb(devdata);
2640         supports_tbt = intel_bios_encoder_supports_tbt(devdata);
2641
2642         drm_dbg_kms(&i915->drm,
2643                     "Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d LSPCON:%d USB-Type-C:%d TBT:%d DSC:%d\n",
2644                     port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp,
2645                     HAS_LSPCON(i915) && child->lspcon,
2646                     supports_typec_usb, supports_tbt,
2647                     devdata->dsc != NULL);
2648
2649         hdmi_level_shift = _intel_bios_hdmi_level_shift(devdata);
2650         if (hdmi_level_shift >= 0) {
2651                 drm_dbg_kms(&i915->drm,
2652                             "Port %c VBT HDMI level shift: %d\n",
2653                             port_name(port), hdmi_level_shift);
2654         }
2655
2656         max_tmds_clock = _intel_bios_max_tmds_clock(devdata);
2657         if (max_tmds_clock)
2658                 drm_dbg_kms(&i915->drm,
2659                             "Port %c VBT HDMI max TMDS clock: %d kHz\n",
2660                             port_name(port), max_tmds_clock);
2661
2662         /* I_boost config for SKL and above */
2663         dp_boost_level = intel_bios_encoder_dp_boost_level(devdata);
2664         if (dp_boost_level)
2665                 drm_dbg_kms(&i915->drm,
2666                             "Port %c VBT (e)DP boost level: %d\n",
2667                             port_name(port), dp_boost_level);
2668
2669         hdmi_boost_level = intel_bios_encoder_hdmi_boost_level(devdata);
2670         if (hdmi_boost_level)
2671                 drm_dbg_kms(&i915->drm,
2672                             "Port %c VBT HDMI boost level: %d\n",
2673                             port_name(port), hdmi_boost_level);
2674
2675         dp_max_link_rate = _intel_bios_dp_max_link_rate(devdata);
2676         if (dp_max_link_rate)
2677                 drm_dbg_kms(&i915->drm,
2678                             "Port %c VBT DP max link rate: %d\n",
2679                             port_name(port), dp_max_link_rate);
2680
2681         /*
2682          * FIXME need to implement support for VBT
2683          * vswing/preemph tables should this ever trigger.
2684          */
2685         drm_WARN(&i915->drm, child->use_vbt_vswing,
2686                  "Port %c asks to use VBT vswing/preemph tables\n",
2687                  port_name(port));
2688 }
2689
2690 static void parse_ddi_port(struct intel_bios_encoder_data *devdata)
2691 {
2692         struct drm_i915_private *i915 = devdata->i915;
2693         const struct child_device_config *child = &devdata->child;
2694         enum port port;
2695
2696         port = dvo_port_to_port(i915, child->dvo_port);
2697         if (port == PORT_NONE)
2698                 return;
2699
2700         if (!is_port_valid(i915, port)) {
2701                 drm_dbg_kms(&i915->drm,
2702                             "VBT reports port %c as supported, but that can't be true: skipping\n",
2703                             port_name(port));
2704                 return;
2705         }
2706
2707         if (i915->display.vbt.ports[port]) {
2708                 drm_dbg_kms(&i915->drm,
2709                             "More than one child device for port %c in VBT, using the first.\n",
2710                             port_name(port));
2711                 return;
2712         }
2713
2714         sanitize_device_type(devdata, port);
2715
2716         if (intel_bios_encoder_supports_dvi(devdata))
2717                 sanitize_ddc_pin(devdata, port);
2718
2719         if (intel_bios_encoder_supports_dp(devdata))
2720                 sanitize_aux_ch(devdata, port);
2721
2722         i915->display.vbt.ports[port] = devdata;
2723 }
2724
2725 static bool has_ddi_port_info(struct drm_i915_private *i915)
2726 {
2727         return DISPLAY_VER(i915) >= 5 || IS_G4X(i915);
2728 }
2729
2730 static void parse_ddi_ports(struct drm_i915_private *i915)
2731 {
2732         struct intel_bios_encoder_data *devdata;
2733         enum port port;
2734
2735         if (!has_ddi_port_info(i915))
2736                 return;
2737
2738         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node)
2739                 parse_ddi_port(devdata);
2740
2741         for_each_port(port) {
2742                 if (i915->display.vbt.ports[port])
2743                         print_ddi_port(i915->display.vbt.ports[port], port);
2744         }
2745 }
2746
2747 static void
2748 parse_general_definitions(struct drm_i915_private *i915)
2749 {
2750         const struct bdb_general_definitions *defs;
2751         struct intel_bios_encoder_data *devdata;
2752         const struct child_device_config *child;
2753         int i, child_device_num;
2754         u8 expected_size;
2755         u16 block_size;
2756         int bus_pin;
2757
2758         defs = find_section(i915, BDB_GENERAL_DEFINITIONS);
2759         if (!defs) {
2760                 drm_dbg_kms(&i915->drm,
2761                             "No general definition block is found, no devices defined.\n");
2762                 return;
2763         }
2764
2765         block_size = get_blocksize(defs);
2766         if (block_size < sizeof(*defs)) {
2767                 drm_dbg_kms(&i915->drm,
2768                             "General definitions block too small (%u)\n",
2769                             block_size);
2770                 return;
2771         }
2772
2773         bus_pin = defs->crt_ddc_gmbus_pin;
2774         drm_dbg_kms(&i915->drm, "crt_ddc_bus_pin: %d\n", bus_pin);
2775         if (intel_gmbus_is_valid_pin(i915, bus_pin))
2776                 i915->display.vbt.crt_ddc_pin = bus_pin;
2777
2778         if (i915->display.vbt.version < 106) {
2779                 expected_size = 22;
2780         } else if (i915->display.vbt.version < 111) {
2781                 expected_size = 27;
2782         } else if (i915->display.vbt.version < 195) {
2783                 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
2784         } else if (i915->display.vbt.version == 195) {
2785                 expected_size = 37;
2786         } else if (i915->display.vbt.version <= 215) {
2787                 expected_size = 38;
2788         } else if (i915->display.vbt.version <= 237) {
2789                 expected_size = 39;
2790         } else {
2791                 expected_size = sizeof(*child);
2792                 BUILD_BUG_ON(sizeof(*child) < 39);
2793                 drm_dbg(&i915->drm,
2794                         "Expected child device config size for VBT version %u not known; assuming %u\n",
2795                         i915->display.vbt.version, expected_size);
2796         }
2797
2798         /* Flag an error for unexpected size, but continue anyway. */
2799         if (defs->child_dev_size != expected_size)
2800                 drm_err(&i915->drm,
2801                         "Unexpected child device config size %u (expected %u for VBT version %u)\n",
2802                         defs->child_dev_size, expected_size, i915->display.vbt.version);
2803
2804         /* The legacy sized child device config is the minimum we need. */
2805         if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
2806                 drm_dbg_kms(&i915->drm,
2807                             "Child device config size %u is too small.\n",
2808                             defs->child_dev_size);
2809                 return;
2810         }
2811
2812         /* get the number of child device */
2813         child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
2814
2815         for (i = 0; i < child_device_num; i++) {
2816                 child = child_device_ptr(defs, i);
2817                 if (!child->device_type)
2818                         continue;
2819
2820                 drm_dbg_kms(&i915->drm,
2821                             "Found VBT child device with type 0x%x\n",
2822                             child->device_type);
2823
2824                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2825                 if (!devdata)
2826                         break;
2827
2828                 devdata->i915 = i915;
2829
2830                 /*
2831                  * Copy as much as we know (sizeof) and is available
2832                  * (child_dev_size) of the child device config. Accessing the
2833                  * data must depend on VBT version.
2834                  */
2835                 memcpy(&devdata->child, child,
2836                        min_t(size_t, defs->child_dev_size, sizeof(*child)));
2837
2838                 list_add_tail(&devdata->node, &i915->display.vbt.display_devices);
2839         }
2840
2841         if (list_empty(&i915->display.vbt.display_devices))
2842                 drm_dbg_kms(&i915->drm,
2843                             "no child dev is parsed from VBT\n");
2844 }
2845
2846 /* Common defaults which may be overridden by VBT. */
2847 static void
2848 init_vbt_defaults(struct drm_i915_private *i915)
2849 {
2850         i915->display.vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2851
2852         /* general features */
2853         i915->display.vbt.int_tv_support = 1;
2854         i915->display.vbt.int_crt_support = 1;
2855
2856         /* driver features */
2857         i915->display.vbt.int_lvds_support = 1;
2858
2859         /* Default to using SSC */
2860         i915->display.vbt.lvds_use_ssc = 1;
2861         /*
2862          * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
2863          * clock for LVDS.
2864          */
2865         i915->display.vbt.lvds_ssc_freq = intel_bios_ssc_frequency(i915,
2866                                                                    !HAS_PCH_SPLIT(i915));
2867         drm_dbg_kms(&i915->drm, "Set default to SSC at %d kHz\n",
2868                     i915->display.vbt.lvds_ssc_freq);
2869 }
2870
2871 /* Common defaults which may be overridden by VBT. */
2872 static void
2873 init_vbt_panel_defaults(struct intel_panel *panel)
2874 {
2875         /* Default to having backlight */
2876         panel->vbt.backlight.present = true;
2877
2878         /* LFP panel data */
2879         panel->vbt.lvds_dither = true;
2880 }
2881
2882 /* Defaults to initialize only if there is no VBT. */
2883 static void
2884 init_vbt_missing_defaults(struct drm_i915_private *i915)
2885 {
2886         enum port port;
2887         int ports = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) |
2888                     BIT(PORT_D) | BIT(PORT_E) | BIT(PORT_F);
2889
2890         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
2891                 return;
2892
2893         for_each_port_masked(port, ports) {
2894                 struct intel_bios_encoder_data *devdata;
2895                 struct child_device_config *child;
2896                 enum phy phy = intel_port_to_phy(i915, port);
2897
2898                 /*
2899                  * VBT has the TypeC mode (native,TBT/USB) and we don't want
2900                  * to detect it.
2901                  */
2902                 if (intel_phy_is_tc(i915, phy))
2903                         continue;
2904
2905                 /* Create fake child device config */
2906                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2907                 if (!devdata)
2908                         break;
2909
2910                 devdata->i915 = i915;
2911                 child = &devdata->child;
2912
2913                 if (port == PORT_F)
2914                         child->dvo_port = DVO_PORT_HDMIF;
2915                 else if (port == PORT_E)
2916                         child->dvo_port = DVO_PORT_HDMIE;
2917                 else
2918                         child->dvo_port = DVO_PORT_HDMIA + port;
2919
2920                 if (port != PORT_A && port != PORT_E)
2921                         child->device_type |= DEVICE_TYPE_TMDS_DVI_SIGNALING;
2922
2923                 if (port != PORT_E)
2924                         child->device_type |= DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2925
2926                 if (port == PORT_A)
2927                         child->device_type |= DEVICE_TYPE_INTERNAL_CONNECTOR;
2928
2929                 list_add_tail(&devdata->node, &i915->display.vbt.display_devices);
2930
2931                 drm_dbg_kms(&i915->drm,
2932                             "Generating default VBT child device with type 0x04%x on port %c\n",
2933                             child->device_type, port_name(port));
2934         }
2935
2936         /* Bypass some minimum baseline VBT version checks */
2937         i915->display.vbt.version = 155;
2938 }
2939
2940 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
2941 {
2942         const void *_vbt = vbt;
2943
2944         return _vbt + vbt->bdb_offset;
2945 }
2946
2947 /**
2948  * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
2949  * @buf:        pointer to a buffer to validate
2950  * @size:       size of the buffer
2951  *
2952  * Returns true on valid VBT.
2953  */
2954 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
2955 {
2956         const struct vbt_header *vbt = buf;
2957         const struct bdb_header *bdb;
2958
2959         if (!vbt)
2960                 return false;
2961
2962         if (sizeof(struct vbt_header) > size) {
2963                 DRM_DEBUG_DRIVER("VBT header incomplete\n");
2964                 return false;
2965         }
2966
2967         if (memcmp(vbt->signature, "$VBT", 4)) {
2968                 DRM_DEBUG_DRIVER("VBT invalid signature\n");
2969                 return false;
2970         }
2971
2972         if (vbt->vbt_size > size) {
2973                 DRM_DEBUG_DRIVER("VBT incomplete (vbt_size overflows)\n");
2974                 return false;
2975         }
2976
2977         size = vbt->vbt_size;
2978
2979         if (range_overflows_t(size_t,
2980                               vbt->bdb_offset,
2981                               sizeof(struct bdb_header),
2982                               size)) {
2983                 DRM_DEBUG_DRIVER("BDB header incomplete\n");
2984                 return false;
2985         }
2986
2987         bdb = get_bdb_header(vbt);
2988         if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
2989                 DRM_DEBUG_DRIVER("BDB incomplete\n");
2990                 return false;
2991         }
2992
2993         return vbt;
2994 }
2995
2996 static struct vbt_header *spi_oprom_get_vbt(struct drm_i915_private *i915)
2997 {
2998         u32 count, data, found, store = 0;
2999         u32 static_region, oprom_offset;
3000         u32 oprom_size = 0x200000;
3001         u16 vbt_size;
3002         u32 *vbt;
3003
3004         static_region = intel_uncore_read(&i915->uncore, SPI_STATIC_REGIONS);
3005         static_region &= OPTIONROM_SPI_REGIONID_MASK;
3006         intel_uncore_write(&i915->uncore, PRIMARY_SPI_REGIONID, static_region);
3007
3008         oprom_offset = intel_uncore_read(&i915->uncore, OROM_OFFSET);
3009         oprom_offset &= OROM_OFFSET_MASK;
3010
3011         for (count = 0; count < oprom_size; count += 4) {
3012                 intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, oprom_offset + count);
3013                 data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3014
3015                 if (data == *((const u32 *)"$VBT")) {
3016                         found = oprom_offset + count;
3017                         break;
3018                 }
3019         }
3020
3021         if (count >= oprom_size)
3022                 goto err_not_found;
3023
3024         /* Get VBT size and allocate space for the VBT */
3025         intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found +
3026                    offsetof(struct vbt_header, vbt_size));
3027         vbt_size = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3028         vbt_size &= 0xffff;
3029
3030         vbt = kzalloc(round_up(vbt_size, 4), GFP_KERNEL);
3031         if (!vbt)
3032                 goto err_not_found;
3033
3034         for (count = 0; count < vbt_size; count += 4) {
3035                 intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found + count);
3036                 data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3037                 *(vbt + store++) = data;
3038         }
3039
3040         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
3041                 goto err_free_vbt;
3042
3043         drm_dbg_kms(&i915->drm, "Found valid VBT in SPI flash\n");
3044
3045         return (struct vbt_header *)vbt;
3046
3047 err_free_vbt:
3048         kfree(vbt);
3049 err_not_found:
3050         return NULL;
3051 }
3052
3053 static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915)
3054 {
3055         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
3056         void __iomem *p = NULL, *oprom;
3057         struct vbt_header *vbt;
3058         u16 vbt_size;
3059         size_t i, size;
3060
3061         oprom = pci_map_rom(pdev, &size);
3062         if (!oprom)
3063                 return NULL;
3064
3065         /* Scour memory looking for the VBT signature. */
3066         for (i = 0; i + 4 < size; i += 4) {
3067                 if (ioread32(oprom + i) != *((const u32 *)"$VBT"))
3068                         continue;
3069
3070                 p = oprom + i;
3071                 size -= i;
3072                 break;
3073         }
3074
3075         if (!p)
3076                 goto err_unmap_oprom;
3077
3078         if (sizeof(struct vbt_header) > size) {
3079                 drm_dbg(&i915->drm, "VBT header incomplete\n");
3080                 goto err_unmap_oprom;
3081         }
3082
3083         vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
3084         if (vbt_size > size) {
3085                 drm_dbg(&i915->drm,
3086                         "VBT incomplete (vbt_size overflows)\n");
3087                 goto err_unmap_oprom;
3088         }
3089
3090         /* The rest will be validated by intel_bios_is_valid_vbt() */
3091         vbt = kmalloc(vbt_size, GFP_KERNEL);
3092         if (!vbt)
3093                 goto err_unmap_oprom;
3094
3095         memcpy_fromio(vbt, p, vbt_size);
3096
3097         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
3098                 goto err_free_vbt;
3099
3100         pci_unmap_rom(pdev, oprom);
3101
3102         drm_dbg_kms(&i915->drm, "Found valid VBT in PCI ROM\n");
3103
3104         return vbt;
3105
3106 err_free_vbt:
3107         kfree(vbt);
3108 err_unmap_oprom:
3109         pci_unmap_rom(pdev, oprom);
3110
3111         return NULL;
3112 }
3113
3114 /**
3115  * intel_bios_init - find VBT and initialize settings from the BIOS
3116  * @i915: i915 device instance
3117  *
3118  * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
3119  * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
3120  * initialize some defaults if the VBT is not present at all.
3121  */
3122 void intel_bios_init(struct drm_i915_private *i915)
3123 {
3124         const struct vbt_header *vbt = i915->display.opregion.vbt;
3125         struct vbt_header *oprom_vbt = NULL;
3126         const struct bdb_header *bdb;
3127
3128         INIT_LIST_HEAD(&i915->display.vbt.display_devices);
3129         INIT_LIST_HEAD(&i915->display.vbt.bdb_blocks);
3130
3131         if (!HAS_DISPLAY(i915)) {
3132                 drm_dbg_kms(&i915->drm,
3133                             "Skipping VBT init due to disabled display.\n");
3134                 return;
3135         }
3136
3137         init_vbt_defaults(i915);
3138
3139         /*
3140          * If the OpRegion does not have VBT, look in SPI flash through MMIO or
3141          * PCI mapping
3142          */
3143         if (!vbt && IS_DGFX(i915)) {
3144                 oprom_vbt = spi_oprom_get_vbt(i915);
3145                 vbt = oprom_vbt;
3146         }
3147
3148         if (!vbt) {
3149                 oprom_vbt = oprom_get_vbt(i915);
3150                 vbt = oprom_vbt;
3151         }
3152
3153         if (!vbt)
3154                 goto out;
3155
3156         bdb = get_bdb_header(vbt);
3157         i915->display.vbt.version = bdb->version;
3158
3159         drm_dbg_kms(&i915->drm,
3160                     "VBT signature \"%.*s\", BDB version %d\n",
3161                     (int)sizeof(vbt->signature), vbt->signature, i915->display.vbt.version);
3162
3163         init_bdb_blocks(i915, bdb);
3164
3165         /* Grab useful general definitions */
3166         parse_general_features(i915);
3167         parse_general_definitions(i915);
3168         parse_driver_features(i915);
3169
3170         /* Depends on child device list */
3171         parse_compression_parameters(i915);
3172
3173 out:
3174         if (!vbt) {
3175                 drm_info(&i915->drm,
3176                          "Failed to find VBIOS tables (VBT)\n");
3177                 init_vbt_missing_defaults(i915);
3178         }
3179
3180         /* Further processing on pre-parsed or generated child device data */
3181         parse_sdvo_device_mapping(i915);
3182         parse_ddi_ports(i915);
3183
3184         kfree(oprom_vbt);
3185 }
3186
3187 static void intel_bios_init_panel(struct drm_i915_private *i915,
3188                                   struct intel_panel *panel,
3189                                   const struct intel_bios_encoder_data *devdata,
3190                                   const struct edid *edid,
3191                                   bool use_fallback)
3192 {
3193         /* already have it? */
3194         if (panel->vbt.panel_type >= 0) {
3195                 drm_WARN_ON(&i915->drm, !use_fallback);
3196                 return;
3197         }
3198
3199         panel->vbt.panel_type = get_panel_type(i915, devdata,
3200                                                edid, use_fallback);
3201         if (panel->vbt.panel_type < 0) {
3202                 drm_WARN_ON(&i915->drm, use_fallback);
3203                 return;
3204         }
3205
3206         init_vbt_panel_defaults(panel);
3207
3208         parse_panel_options(i915, panel);
3209         parse_generic_dtd(i915, panel);
3210         parse_lfp_data(i915, panel);
3211         parse_lfp_backlight(i915, panel);
3212         parse_sdvo_panel_data(i915, panel);
3213         parse_panel_driver_features(i915, panel);
3214         parse_power_conservation_features(i915, panel);
3215         parse_edp(i915, panel);
3216         parse_psr(i915, panel);
3217         parse_mipi_config(i915, panel);
3218         parse_mipi_sequence(i915, panel);
3219 }
3220
3221 void intel_bios_init_panel_early(struct drm_i915_private *i915,
3222                                  struct intel_panel *panel,
3223                                  const struct intel_bios_encoder_data *devdata)
3224 {
3225         intel_bios_init_panel(i915, panel, devdata, NULL, false);
3226 }
3227
3228 void intel_bios_init_panel_late(struct drm_i915_private *i915,
3229                                 struct intel_panel *panel,
3230                                 const struct intel_bios_encoder_data *devdata,
3231                                 const struct edid *edid)
3232 {
3233         intel_bios_init_panel(i915, panel, devdata, edid, true);
3234 }
3235
3236 /**
3237  * intel_bios_driver_remove - Free any resources allocated by intel_bios_init()
3238  * @i915: i915 device instance
3239  */
3240 void intel_bios_driver_remove(struct drm_i915_private *i915)
3241 {
3242         struct intel_bios_encoder_data *devdata, *nd;
3243         struct bdb_block_entry *entry, *ne;
3244
3245         list_for_each_entry_safe(devdata, nd, &i915->display.vbt.display_devices, node) {
3246                 list_del(&devdata->node);
3247                 kfree(devdata->dsc);
3248                 kfree(devdata);
3249         }
3250
3251         list_for_each_entry_safe(entry, ne, &i915->display.vbt.bdb_blocks, node) {
3252                 list_del(&entry->node);
3253                 kfree(entry);
3254         }
3255 }
3256
3257 void intel_bios_fini_panel(struct intel_panel *panel)
3258 {
3259         kfree(panel->vbt.sdvo_lvds_vbt_mode);
3260         panel->vbt.sdvo_lvds_vbt_mode = NULL;
3261         kfree(panel->vbt.lfp_lvds_vbt_mode);
3262         panel->vbt.lfp_lvds_vbt_mode = NULL;
3263         kfree(panel->vbt.dsi.data);
3264         panel->vbt.dsi.data = NULL;
3265         kfree(panel->vbt.dsi.pps);
3266         panel->vbt.dsi.pps = NULL;
3267         kfree(panel->vbt.dsi.config);
3268         panel->vbt.dsi.config = NULL;
3269         kfree(panel->vbt.dsi.deassert_seq);
3270         panel->vbt.dsi.deassert_seq = NULL;
3271 }
3272
3273 /**
3274  * intel_bios_is_tv_present - is integrated TV present in VBT
3275  * @i915: i915 device instance
3276  *
3277  * Return true if TV is present. If no child devices were parsed from VBT,
3278  * assume TV is present.
3279  */
3280 bool intel_bios_is_tv_present(struct drm_i915_private *i915)
3281 {
3282         const struct intel_bios_encoder_data *devdata;
3283         const struct child_device_config *child;
3284
3285         if (!i915->display.vbt.int_tv_support)
3286                 return false;
3287
3288         if (list_empty(&i915->display.vbt.display_devices))
3289                 return true;
3290
3291         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3292                 child = &devdata->child;
3293
3294                 /*
3295                  * If the device type is not TV, continue.
3296                  */
3297                 switch (child->device_type) {
3298                 case DEVICE_TYPE_INT_TV:
3299                 case DEVICE_TYPE_TV:
3300                 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
3301                         break;
3302                 default:
3303                         continue;
3304                 }
3305                 /* Only when the addin_offset is non-zero, it is regarded
3306                  * as present.
3307                  */
3308                 if (child->addin_offset)
3309                         return true;
3310         }
3311
3312         return false;
3313 }
3314
3315 /**
3316  * intel_bios_is_lvds_present - is LVDS present in VBT
3317  * @i915:       i915 device instance
3318  * @i2c_pin:    i2c pin for LVDS if present
3319  *
3320  * Return true if LVDS is present. If no child devices were parsed from VBT,
3321  * assume LVDS is present.
3322  */
3323 bool intel_bios_is_lvds_present(struct drm_i915_private *i915, u8 *i2c_pin)
3324 {
3325         const struct intel_bios_encoder_data *devdata;
3326         const struct child_device_config *child;
3327
3328         if (list_empty(&i915->display.vbt.display_devices))
3329                 return true;
3330
3331         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3332                 child = &devdata->child;
3333
3334                 /* If the device type is not LFP, continue.
3335                  * We have to check both the new identifiers as well as the
3336                  * old for compatibility with some BIOSes.
3337                  */
3338                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
3339                     child->device_type != DEVICE_TYPE_LFP)
3340                         continue;
3341
3342                 if (intel_gmbus_is_valid_pin(i915, child->i2c_pin))
3343                         *i2c_pin = child->i2c_pin;
3344
3345                 /* However, we cannot trust the BIOS writers to populate
3346                  * the VBT correctly.  Since LVDS requires additional
3347                  * information from AIM blocks, a non-zero addin offset is
3348                  * a good indicator that the LVDS is actually present.
3349                  */
3350                 if (child->addin_offset)
3351                         return true;
3352
3353                 /* But even then some BIOS writers perform some black magic
3354                  * and instantiate the device without reference to any
3355                  * additional data.  Trust that if the VBT was written into
3356                  * the OpRegion then they have validated the LVDS's existence.
3357                  */
3358                 if (i915->display.opregion.vbt)
3359                         return true;
3360         }
3361
3362         return false;
3363 }
3364
3365 /**
3366  * intel_bios_is_port_present - is the specified digital port present
3367  * @i915:       i915 device instance
3368  * @port:       port to check
3369  *
3370  * Return true if the device in %port is present.
3371  */
3372 bool intel_bios_is_port_present(struct drm_i915_private *i915, enum port port)
3373 {
3374         if (WARN_ON(!has_ddi_port_info(i915)))
3375                 return true;
3376
3377         return i915->display.vbt.ports[port];
3378 }
3379
3380 /**
3381  * intel_bios_is_port_edp - is the device in given port eDP
3382  * @i915:       i915 device instance
3383  * @port:       port to check
3384  *
3385  * Return true if the device in %port is eDP.
3386  */
3387 bool intel_bios_is_port_edp(struct drm_i915_private *i915, enum port port)
3388 {
3389         const struct intel_bios_encoder_data *devdata =
3390                 intel_bios_encoder_data_lookup(i915, port);
3391
3392         return devdata && intel_bios_encoder_supports_edp(devdata);
3393 }
3394
3395 static bool intel_bios_encoder_supports_dp_dual_mode(const struct intel_bios_encoder_data *devdata)
3396 {
3397         const struct child_device_config *child = &devdata->child;
3398
3399         if (!intel_bios_encoder_supports_dp(devdata) ||
3400             !intel_bios_encoder_supports_hdmi(devdata))
3401                 return false;
3402
3403         if (dvo_port_type(child->dvo_port) == DVO_PORT_DPA)
3404                 return true;
3405
3406         /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
3407         if (dvo_port_type(child->dvo_port) == DVO_PORT_HDMIA &&
3408             child->aux_channel != 0)
3409                 return true;
3410
3411         return false;
3412 }
3413
3414 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *i915,
3415                                      enum port port)
3416 {
3417         const struct intel_bios_encoder_data *devdata =
3418                 intel_bios_encoder_data_lookup(i915, port);
3419
3420         return devdata && intel_bios_encoder_supports_dp_dual_mode(devdata);
3421 }
3422
3423 /**
3424  * intel_bios_is_dsi_present - is DSI present in VBT
3425  * @i915:       i915 device instance
3426  * @port:       port for DSI if present
3427  *
3428  * Return true if DSI is present, and return the port in %port.
3429  */
3430 bool intel_bios_is_dsi_present(struct drm_i915_private *i915,
3431                                enum port *port)
3432 {
3433         const struct intel_bios_encoder_data *devdata;
3434         const struct child_device_config *child;
3435         u8 dvo_port;
3436
3437         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3438                 child = &devdata->child;
3439
3440                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
3441                         continue;
3442
3443                 dvo_port = child->dvo_port;
3444
3445                 if (dvo_port == DVO_PORT_MIPIA ||
3446                     (dvo_port == DVO_PORT_MIPIB && DISPLAY_VER(i915) >= 11) ||
3447                     (dvo_port == DVO_PORT_MIPIC && DISPLAY_VER(i915) < 11)) {
3448                         if (port)
3449                                 *port = dvo_port - DVO_PORT_MIPIA;
3450                         return true;
3451                 } else if (dvo_port == DVO_PORT_MIPIB ||
3452                            dvo_port == DVO_PORT_MIPIC ||
3453                            dvo_port == DVO_PORT_MIPID) {
3454                         drm_dbg_kms(&i915->drm,
3455                                     "VBT has unsupported DSI port %c\n",
3456                                     port_name(dvo_port - DVO_PORT_MIPIA));
3457                 }
3458         }
3459
3460         return false;
3461 }
3462
3463 static void fill_dsc(struct intel_crtc_state *crtc_state,
3464                      struct dsc_compression_parameters_entry *dsc,
3465                      int dsc_max_bpc)
3466 {
3467         struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
3468         int bpc = 8;
3469
3470         vdsc_cfg->dsc_version_major = dsc->version_major;
3471         vdsc_cfg->dsc_version_minor = dsc->version_minor;
3472
3473         if (dsc->support_12bpc && dsc_max_bpc >= 12)
3474                 bpc = 12;
3475         else if (dsc->support_10bpc && dsc_max_bpc >= 10)
3476                 bpc = 10;
3477         else if (dsc->support_8bpc && dsc_max_bpc >= 8)
3478                 bpc = 8;
3479         else
3480                 DRM_DEBUG_KMS("VBT: Unsupported BPC %d for DCS\n",
3481                               dsc_max_bpc);
3482
3483         crtc_state->pipe_bpp = bpc * 3;
3484
3485         crtc_state->dsc.compressed_bpp = min(crtc_state->pipe_bpp,
3486                                              VBT_DSC_MAX_BPP(dsc->max_bpp));
3487
3488         /*
3489          * FIXME: This is ugly, and slice count should take DSC engine
3490          * throughput etc. into account.
3491          *
3492          * Also, per spec DSI supports 1, 2, 3 or 4 horizontal slices.
3493          */
3494         if (dsc->slices_per_line & BIT(2)) {
3495                 crtc_state->dsc.slice_count = 4;
3496         } else if (dsc->slices_per_line & BIT(1)) {
3497                 crtc_state->dsc.slice_count = 2;
3498         } else {
3499                 /* FIXME */
3500                 if (!(dsc->slices_per_line & BIT(0)))
3501                         DRM_DEBUG_KMS("VBT: Unsupported DSC slice count for DSI\n");
3502
3503                 crtc_state->dsc.slice_count = 1;
3504         }
3505
3506         if (crtc_state->hw.adjusted_mode.crtc_hdisplay %
3507             crtc_state->dsc.slice_count != 0)
3508                 DRM_DEBUG_KMS("VBT: DSC hdisplay %d not divisible by slice count %d\n",
3509                               crtc_state->hw.adjusted_mode.crtc_hdisplay,
3510                               crtc_state->dsc.slice_count);
3511
3512         /*
3513          * The VBT rc_buffer_block_size and rc_buffer_size definitions
3514          * correspond to DP 1.4 DPCD offsets 0x62 and 0x63.
3515          */
3516         vdsc_cfg->rc_model_size = drm_dsc_dp_rc_buffer_size(dsc->rc_buffer_block_size,
3517                                                             dsc->rc_buffer_size);
3518
3519         /* FIXME: DSI spec says bpc + 1 for this one */
3520         vdsc_cfg->line_buf_depth = VBT_DSC_LINE_BUFFER_DEPTH(dsc->line_buffer_depth);
3521
3522         vdsc_cfg->block_pred_enable = dsc->block_prediction_enable;
3523
3524         vdsc_cfg->slice_height = dsc->slice_height;
3525 }
3526
3527 /* FIXME: initially DSI specific */
3528 bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
3529                                struct intel_crtc_state *crtc_state,
3530                                int dsc_max_bpc)
3531 {
3532         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3533         const struct intel_bios_encoder_data *devdata;
3534         const struct child_device_config *child;
3535
3536         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3537                 child = &devdata->child;
3538
3539                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
3540                         continue;
3541
3542                 if (child->dvo_port - DVO_PORT_MIPIA == encoder->port) {
3543                         if (!devdata->dsc)
3544                                 return false;
3545
3546                         if (crtc_state)
3547                                 fill_dsc(crtc_state, devdata->dsc, dsc_max_bpc);
3548
3549                         return true;
3550                 }
3551         }
3552
3553         return false;
3554 }
3555
3556 /**
3557  * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
3558  * @i915:       i915 device instance
3559  * @port:       port to check
3560  *
3561  * Return true if HPD should be inverted for %port.
3562  */
3563 bool
3564 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
3565                                 enum port port)
3566 {
3567         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3568
3569         if (drm_WARN_ON_ONCE(&i915->drm,
3570                              !IS_GEMINILAKE(i915) && !IS_BROXTON(i915)))
3571                 return false;
3572
3573         return devdata && devdata->child.hpd_invert;
3574 }
3575
3576 /**
3577  * intel_bios_is_lspcon_present - if LSPCON is attached on %port
3578  * @i915:       i915 device instance
3579  * @port:       port to check
3580  *
3581  * Return true if LSPCON is present on this port
3582  */
3583 bool
3584 intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
3585                              enum port port)
3586 {
3587         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3588
3589         return HAS_LSPCON(i915) && devdata && devdata->child.lspcon;
3590 }
3591
3592 /**
3593  * intel_bios_is_lane_reversal_needed - if lane reversal needed on port
3594  * @i915:       i915 device instance
3595  * @port:       port to check
3596  *
3597  * Return true if port requires lane reversal
3598  */
3599 bool
3600 intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
3601                                    enum port port)
3602 {
3603         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3604
3605         return devdata && devdata->child.lane_reversal;
3606 }
3607
3608 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *i915,
3609                                    enum port port)
3610 {
3611         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3612         enum aux_ch aux_ch;
3613
3614         if (!devdata || !devdata->child.aux_channel) {
3615                 aux_ch = (enum aux_ch)port;
3616
3617                 drm_dbg_kms(&i915->drm,
3618                             "using AUX %c for port %c (platform default)\n",
3619                             aux_ch_name(aux_ch), port_name(port));
3620                 return aux_ch;
3621         }
3622
3623         /*
3624          * RKL/DG1 VBT uses PHY based mapping. Combo PHYs A,B,C,D
3625          * map to DDI A,B,TC1,TC2 respectively.
3626          *
3627          * ADL-S VBT uses PHY based mapping. Combo PHYs A,B,C,D,E
3628          * map to DDI A,TC1,TC2,TC3,TC4 respectively.
3629          */
3630         switch (devdata->child.aux_channel) {
3631         case DP_AUX_A:
3632                 aux_ch = AUX_CH_A;
3633                 break;
3634         case DP_AUX_B:
3635                 if (IS_ALDERLAKE_S(i915))
3636                         aux_ch = AUX_CH_USBC1;
3637                 else
3638                         aux_ch = AUX_CH_B;
3639                 break;
3640         case DP_AUX_C:
3641                 if (IS_ALDERLAKE_S(i915))
3642                         aux_ch = AUX_CH_USBC2;
3643                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
3644                         aux_ch = AUX_CH_USBC1;
3645                 else
3646                         aux_ch = AUX_CH_C;
3647                 break;
3648         case DP_AUX_D:
3649                 if (DISPLAY_VER(i915) >= 13)
3650                         aux_ch = AUX_CH_D_XELPD;
3651                 else if (IS_ALDERLAKE_S(i915))
3652                         aux_ch = AUX_CH_USBC3;
3653                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
3654                         aux_ch = AUX_CH_USBC2;
3655                 else
3656                         aux_ch = AUX_CH_D;
3657                 break;
3658         case DP_AUX_E:
3659                 if (DISPLAY_VER(i915) >= 13)
3660                         aux_ch = AUX_CH_E_XELPD;
3661                 else if (IS_ALDERLAKE_S(i915))
3662                         aux_ch = AUX_CH_USBC4;
3663                 else
3664                         aux_ch = AUX_CH_E;
3665                 break;
3666         case DP_AUX_F:
3667                 if (DISPLAY_VER(i915) >= 13)
3668                         aux_ch = AUX_CH_USBC1;
3669                 else
3670                         aux_ch = AUX_CH_F;
3671                 break;
3672         case DP_AUX_G:
3673                 if (DISPLAY_VER(i915) >= 13)
3674                         aux_ch = AUX_CH_USBC2;
3675                 else
3676                         aux_ch = AUX_CH_G;
3677                 break;
3678         case DP_AUX_H:
3679                 if (DISPLAY_VER(i915) >= 13)
3680                         aux_ch = AUX_CH_USBC3;
3681                 else
3682                         aux_ch = AUX_CH_H;
3683                 break;
3684         case DP_AUX_I:
3685                 if (DISPLAY_VER(i915) >= 13)
3686                         aux_ch = AUX_CH_USBC4;
3687                 else
3688                         aux_ch = AUX_CH_I;
3689                 break;
3690         default:
3691                 MISSING_CASE(devdata->child.aux_channel);
3692                 aux_ch = AUX_CH_A;
3693                 break;
3694         }
3695
3696         drm_dbg_kms(&i915->drm, "using AUX %c for port %c (VBT)\n",
3697                     aux_ch_name(aux_ch), port_name(port));
3698
3699         return aux_ch;
3700 }
3701
3702 int intel_bios_max_tmds_clock(struct intel_encoder *encoder)
3703 {
3704         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3705         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3706
3707         return _intel_bios_max_tmds_clock(devdata);
3708 }
3709
3710 /* This is an index in the HDMI/DVI DDI buffer translation table, or -1 */
3711 int intel_bios_hdmi_level_shift(struct intel_encoder *encoder)
3712 {
3713         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3714         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3715
3716         return _intel_bios_hdmi_level_shift(devdata);
3717 }
3718
3719 int intel_bios_encoder_dp_boost_level(const struct intel_bios_encoder_data *devdata)
3720 {
3721         if (!devdata || devdata->i915->display.vbt.version < 196 || !devdata->child.iboost)
3722                 return 0;
3723
3724         return translate_iboost(devdata->child.dp_iboost_level);
3725 }
3726
3727 int intel_bios_encoder_hdmi_boost_level(const struct intel_bios_encoder_data *devdata)
3728 {
3729         if (!devdata || devdata->i915->display.vbt.version < 196 || !devdata->child.iboost)
3730                 return 0;
3731
3732         return translate_iboost(devdata->child.hdmi_iboost_level);
3733 }
3734
3735 int intel_bios_dp_max_link_rate(struct intel_encoder *encoder)
3736 {
3737         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3738         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3739
3740         return _intel_bios_dp_max_link_rate(devdata);
3741 }
3742
3743 int intel_bios_dp_max_lane_count(struct intel_encoder *encoder)
3744 {
3745         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3746         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3747
3748         return _intel_bios_dp_max_lane_count(devdata);
3749 }
3750
3751 int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
3752 {
3753         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3754         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3755
3756         if (!devdata || !devdata->child.ddc_pin)
3757                 return 0;
3758
3759         return map_ddc_pin(i915, devdata->child.ddc_pin);
3760 }
3761
3762 bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)
3763 {
3764         return devdata->i915->display.vbt.version >= 195 && devdata->child.dp_usb_type_c;
3765 }
3766
3767 bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devdata)
3768 {
3769         return devdata->i915->display.vbt.version >= 209 && devdata->child.tbt;
3770 }
3771
3772 const struct intel_bios_encoder_data *
3773 intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
3774 {
3775         return i915->display.vbt.ports[port];
3776 }