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/display/drm_dp_helper.h>
  29 #include <drm/display/drm_dsc_helper.h>
  30 #include <drm/drm_edid.h>
  31
  32 #include "i915_drv.h"
  33 #include "i915_reg.h"
  34 #include "intel_display.h"
  35 #include "intel_display_types.h"
  36 #include "intel_gmbus.h"
  37
  38 #define _INTEL_BIOS_PRIVATE
  39 #include "intel_vbt_defs.h"
  40
  41 /**
  42  * DOC: Video BIOS Table (VBT)
  43  *
  44  * The Video BIOS Table, or VBT, provides platform and board specific
  45  * configuration information to the driver that is not discoverable or available
  46  * through other means. The configuration is mostly related to display
  47  * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
  48  * the PCI ROM.
  49  *
  50  * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
  51  * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
  52  * contain the actual configuration information. The VBT Header, and thus the
  53  * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
  54  * BDB Header. The data blocks are concatenated after the BDB Header. The data
  55  * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
  56  * data. (Block 53, the MIPI Sequence Block is an exception.)
  57  *
  58  * The driver parses the VBT during load. The relevant information is stored in
  59  * driver private data for ease of use, and the actual VBT is not read after
  60  * that.
  61  */
  62
  63 /* Wrapper for VBT child device config */
  64 struct intel_bios_encoder_data {
  65         struct drm_i915_private *i915;
  66
  67         struct child_device_config child;
  68         struct dsc_compression_parameters_entry *dsc;
  69         struct list_head node;
  70 };
  71
  72 #define SLAVE_ADDR1     0x70
  73 #define SLAVE_ADDR2     0x72
  74
  75 /* Get BDB block size given a pointer to Block ID. */
  76 static u32 _get_blocksize(const u8 *block_base)
  77 {
  78         /* The MIPI Sequence Block v3+ has a separate size field. */
  79         if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
  80                 return *((const u32 *)(block_base + 4));
  81         else
  82                 return *((const u16 *)(block_base + 1));
  83 }
  84
  85 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
  86 static u32 get_blocksize(const void *block_data)
  87 {
  88         return _get_blocksize(block_data - 3);
  89 }
  90
  91 static const void *
  92 find_raw_section(const void *_bdb, enum bdb_block_id section_id)
  93 {
  94         const struct bdb_header *bdb = _bdb;
  95         const u8 *base = _bdb;
  96         int index = 0;
  97         u32 total, current_size;
  98         enum bdb_block_id current_id;
  99
 100         /* skip to first section */
 101         index += bdb->header_size;
 102         total = bdb->bdb_size;
 103
 104         /* walk the sections looking for section_id */
 105         while (index + 3 < total) {
 106                 current_id = *(base + index);
 107                 current_size = _get_blocksize(base + index);
 108                 index += 3;
 109
 110                 if (index + current_size > total)
 111                         return NULL;
 112
 113                 if (current_id == section_id)
 114                         return base + index;
 115
 116                 index += current_size;
 117         }
 118
 119         return NULL;
 120 }
 121
 122 /*
 123  * Offset from the start of BDB to the start of the
 124  * block data (just past the block header).
 125  */
 126 static u32 raw_block_offset(const void *bdb, enum bdb_block_id section_id)
 127 {
 128         const void *block;
 129
 130         block = find_raw_section(bdb, section_id);
 131         if (!block)
 132                 return 0;
 133
 134         return block - bdb;
 135 }
 136
 137 struct bdb_block_entry {
 138         struct list_head node;
 139         enum bdb_block_id section_id;
 140         u8 data[];
 141 };
 142
 143 static const void *
 144 find_section(struct drm_i915_private *i915,
 145              enum bdb_block_id section_id)
 146 {
 147         struct bdb_block_entry *entry;
 148
 149         list_for_each_entry(entry, &i915->display.vbt.bdb_blocks, node) {
 150                 if (entry->section_id == section_id)
 151                         return entry->data + 3;
 152         }
 153
 154         return NULL;
 155 }
 156
 157 static const struct {
 158         enum bdb_block_id section_id;
 159         size_t min_size;
 160 } bdb_blocks[] = {
 161         { .section_id = BDB_GENERAL_FEATURES,
 162           .min_size = sizeof(struct bdb_general_features), },
 163         { .section_id = BDB_GENERAL_DEFINITIONS,
 164           .min_size = sizeof(struct bdb_general_definitions), },
 165         { .section_id = BDB_PSR,
 166           .min_size = sizeof(struct bdb_psr), },
 167         { .section_id = BDB_DRIVER_FEATURES,
 168           .min_size = sizeof(struct bdb_driver_features), },
 169         { .section_id = BDB_SDVO_LVDS_OPTIONS,
 170           .min_size = sizeof(struct bdb_sdvo_lvds_options), },
 171         { .section_id = BDB_SDVO_PANEL_DTDS,
 172           .min_size = sizeof(struct bdb_sdvo_panel_dtds), },
 173         { .section_id = BDB_EDP,
 174           .min_size = sizeof(struct bdb_edp), },
 175         { .section_id = BDB_LVDS_OPTIONS,
 176           .min_size = sizeof(struct bdb_lvds_options), },
 177         /*
 178          * BDB_LVDS_LFP_DATA depends on BDB_LVDS_LFP_DATA_PTRS,
 179          * so keep the two ordered.
 180          */
 181         { .section_id = BDB_LVDS_LFP_DATA_PTRS,
 182           .min_size = sizeof(struct bdb_lvds_lfp_data_ptrs), },
 183         { .section_id = BDB_LVDS_LFP_DATA,
 184           .min_size = 0, /* special case */ },
 185         { .section_id = BDB_LVDS_BACKLIGHT,
 186           .min_size = sizeof(struct bdb_lfp_backlight_data), },
 187         { .section_id = BDB_LFP_POWER,
 188           .min_size = sizeof(struct bdb_lfp_power), },
 189         { .section_id = BDB_MIPI_CONFIG,
 190           .min_size = sizeof(struct bdb_mipi_config), },
 191         { .section_id = BDB_MIPI_SEQUENCE,
 192           .min_size = sizeof(struct bdb_mipi_sequence) },
 193         { .section_id = BDB_COMPRESSION_PARAMETERS,
 194           .min_size = sizeof(struct bdb_compression_parameters), },
 195         { .section_id = BDB_GENERIC_DTD,
 196           .min_size = sizeof(struct bdb_generic_dtd), },
 197 };
 198
 199 static size_t lfp_data_min_size(struct drm_i915_private *i915)
 200 {
 201         const struct bdb_lvds_lfp_data_ptrs *ptrs;
 202         size_t size;
 203
 204         ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
 205         if (!ptrs)
 206                 return 0;
 207
 208         size = sizeof(struct bdb_lvds_lfp_data);
 209         if (ptrs->panel_name.table_size)
 210                 size = max(size, ptrs->panel_name.offset +
 211                            sizeof(struct bdb_lvds_lfp_data_tail));
 212
 213         return size;
 214 }
 215
 216 static bool validate_lfp_data_ptrs(const void *bdb,
 217                                    const struct bdb_lvds_lfp_data_ptrs *ptrs)
 218 {
 219         int fp_timing_size, dvo_timing_size, panel_pnp_id_size, panel_name_size;
 220         int data_block_size, lfp_data_size;
 221         const void *data_block;
 222         int i;
 223
 224         data_block = find_raw_section(bdb, BDB_LVDS_LFP_DATA);
 225         if (!data_block)
 226                 return false;
 227
 228         data_block_size = get_blocksize(data_block);
 229         if (data_block_size == 0)
 230                 return false;
 231
 232         /* always 3 indicating the presence of fp_timing+dvo_timing+panel_pnp_id */
 233         if (ptrs->lvds_entries != 3)
 234                 return false;
 235
 236         fp_timing_size = ptrs->ptr[0].fp_timing.table_size;
 237         dvo_timing_size = ptrs->ptr[0].dvo_timing.table_size;
 238         panel_pnp_id_size = ptrs->ptr[0].panel_pnp_id.table_size;
 239         panel_name_size = ptrs->panel_name.table_size;
 240
 241         /* fp_timing has variable size */
 242         if (fp_timing_size < 32 ||
 243             dvo_timing_size != sizeof(struct lvds_dvo_timing) ||
 244             panel_pnp_id_size != sizeof(struct lvds_pnp_id))
 245                 return false;
 246
 247         /* panel_name is not present in old VBTs */
 248         if (panel_name_size != 0 &&
 249             panel_name_size != sizeof(struct lvds_lfp_panel_name))
 250                 return false;
 251
 252         lfp_data_size = ptrs->ptr[1].fp_timing.offset - ptrs->ptr[0].fp_timing.offset;
 253         if (16 * lfp_data_size > data_block_size)
 254                 return false;
 255
 256         /* make sure the table entries have uniform size */
 257         for (i = 1; i < 16; i++) {
 258                 if (ptrs->ptr[i].fp_timing.table_size != fp_timing_size ||
 259                     ptrs->ptr[i].dvo_timing.table_size != dvo_timing_size ||
 260                     ptrs->ptr[i].panel_pnp_id.table_size != panel_pnp_id_size)
 261                         return false;
 262
 263                 if (ptrs->ptr[i].fp_timing.offset - ptrs->ptr[i-1].fp_timing.offset != lfp_data_size ||
 264                     ptrs->ptr[i].dvo_timing.offset - ptrs->ptr[i-1].dvo_timing.offset != lfp_data_size ||
 265                     ptrs->ptr[i].panel_pnp_id.offset - ptrs->ptr[i-1].panel_pnp_id.offset != lfp_data_size)
 266                         return false;
 267         }
 268
 269         /*
 270          * Except for vlv/chv machines all real VBTs seem to have 6
 271          * unaccounted bytes in the fp_timing table. And it doesn't
 272          * appear to be a really intentional hole as the fp_timing
 273          * 0xffff terminator is always within those 6 missing bytes.
 274          */
 275         if (fp_timing_size + 6 + dvo_timing_size + panel_pnp_id_size == lfp_data_size)
 276                 fp_timing_size += 6;
 277
 278         if (fp_timing_size + dvo_timing_size + panel_pnp_id_size != lfp_data_size)
 279                 return false;
 280
 281         if (ptrs->ptr[0].fp_timing.offset + fp_timing_size != ptrs->ptr[0].dvo_timing.offset ||
 282             ptrs->ptr[0].dvo_timing.offset + dvo_timing_size != ptrs->ptr[0].panel_pnp_id.offset ||
 283             ptrs->ptr[0].panel_pnp_id.offset + panel_pnp_id_size != lfp_data_size)
 284                 return false;
 285
 286         /* make sure the tables fit inside the data block */
 287         for (i = 0; i < 16; i++) {
 288                 if (ptrs->ptr[i].fp_timing.offset + fp_timing_size > data_block_size ||
 289                     ptrs->ptr[i].dvo_timing.offset + dvo_timing_size > data_block_size ||
 290                     ptrs->ptr[i].panel_pnp_id.offset + panel_pnp_id_size > data_block_size)
 291                         return false;
 292         }
 293
 294         if (ptrs->panel_name.offset + 16 * panel_name_size > data_block_size)
 295                 return false;
 296
 297         /* make sure fp_timing terminators are present at expected locations */
 298         for (i = 0; i < 16; i++) {
 299                 const u16 *t = data_block + ptrs->ptr[i].fp_timing.offset +
 300                         fp_timing_size - 2;
 301
 302                 if (*t != 0xffff)
 303                         return false;
 304         }
 305
 306         return true;
 307 }
 308
 309 /* make the data table offsets relative to the data block */
 310 static bool fixup_lfp_data_ptrs(const void *bdb, void *ptrs_block)
 311 {
 312         struct bdb_lvds_lfp_data_ptrs *ptrs = ptrs_block;
 313         u32 offset;
 314         int i;
 315
 316         offset = raw_block_offset(bdb, BDB_LVDS_LFP_DATA);
 317
 318         for (i = 0; i < 16; i++) {
 319                 if (ptrs->ptr[i].fp_timing.offset < offset ||
 320                     ptrs->ptr[i].dvo_timing.offset < offset ||
 321                     ptrs->ptr[i].panel_pnp_id.offset < offset)
 322                         return false;
 323
 324                 ptrs->ptr[i].fp_timing.offset -= offset;
 325                 ptrs->ptr[i].dvo_timing.offset -= offset;
 326                 ptrs->ptr[i].panel_pnp_id.offset -= offset;
 327         }
 328
 329         if (ptrs->panel_name.table_size) {
 330                 if (ptrs->panel_name.offset < offset)
 331                         return false;
 332
 333                 ptrs->panel_name.offset -= offset;
 334         }
 335
 336         return validate_lfp_data_ptrs(bdb, ptrs);
 337 }
 338
 339 static int make_lfp_data_ptr(struct lvds_lfp_data_ptr_table *table,
 340                              int table_size, int total_size)
 341 {
 342         if (total_size < table_size)
 343                 return total_size;
 344
 345         table->table_size = table_size;
 346         table->offset = total_size - table_size;
 347
 348         return total_size - table_size;
 349 }
 350
 351 static void next_lfp_data_ptr(struct lvds_lfp_data_ptr_table *next,
 352                               const struct lvds_lfp_data_ptr_table *prev,
 353                               int size)
 354 {
 355         next->table_size = prev->table_size;
 356         next->offset = prev->offset + size;
 357 }
 358
 359 static void *generate_lfp_data_ptrs(struct drm_i915_private *i915,
 360                                     const void *bdb)
 361 {
 362         int i, size, table_size, block_size, offset, fp_timing_size;
 363         struct bdb_lvds_lfp_data_ptrs *ptrs;
 364         const void *block;
 365         void *ptrs_block;
 366
 367         /*
 368          * The hardcoded fp_timing_size is only valid for
 369          * modernish VBTs. All older VBTs definitely should
 370          * include block 41 and thus we don't need to
 371          * generate one.
 372          */
 373         if (i915->display.vbt.version < 155)
 374                 return NULL;
 375
 376         fp_timing_size = 38;
 377
 378         block = find_raw_section(bdb, BDB_LVDS_LFP_DATA);
 379         if (!block)
 380                 return NULL;
 381
 382         drm_dbg_kms(&i915->drm, "Generating LFP data table pointers\n");
 383
 384         block_size = get_blocksize(block);
 385
 386         size = fp_timing_size + sizeof(struct lvds_dvo_timing) +
 387                 sizeof(struct lvds_pnp_id);
 388         if (size * 16 > block_size)
 389                 return NULL;
 390
 391         ptrs_block = kzalloc(sizeof(*ptrs) + 3, GFP_KERNEL);
 392         if (!ptrs_block)
 393                 return NULL;
 394
 395         *(u8 *)(ptrs_block + 0) = BDB_LVDS_LFP_DATA_PTRS;
 396         *(u16 *)(ptrs_block + 1) = sizeof(*ptrs);
 397         ptrs = ptrs_block + 3;
 398
 399         table_size = sizeof(struct lvds_pnp_id);
 400         size = make_lfp_data_ptr(&ptrs->ptr[0].panel_pnp_id, table_size, size);
 401
 402         table_size = sizeof(struct lvds_dvo_timing);
 403         size = make_lfp_data_ptr(&ptrs->ptr[0].dvo_timing, table_size, size);
 404
 405         table_size = fp_timing_size;
 406         size = make_lfp_data_ptr(&ptrs->ptr[0].fp_timing, table_size, size);
 407
 408         if (ptrs->ptr[0].fp_timing.table_size)
 409                 ptrs->lvds_entries++;
 410         if (ptrs->ptr[0].dvo_timing.table_size)
 411                 ptrs->lvds_entries++;
 412         if (ptrs->ptr[0].panel_pnp_id.table_size)
 413                 ptrs->lvds_entries++;
 414
 415         if (size != 0 || ptrs->lvds_entries != 3) {
 416                 kfree(ptrs_block);
 417                 return NULL;
 418         }
 419
 420         size = fp_timing_size + sizeof(struct lvds_dvo_timing) +
 421                 sizeof(struct lvds_pnp_id);
 422         for (i = 1; i < 16; i++) {
 423                 next_lfp_data_ptr(&ptrs->ptr[i].fp_timing, &ptrs->ptr[i-1].fp_timing, size);
 424                 next_lfp_data_ptr(&ptrs->ptr[i].dvo_timing, &ptrs->ptr[i-1].dvo_timing, size);
 425                 next_lfp_data_ptr(&ptrs->ptr[i].panel_pnp_id, &ptrs->ptr[i-1].panel_pnp_id, size);
 426         }
 427
 428         table_size = sizeof(struct lvds_lfp_panel_name);
 429
 430         if (16 * (size + table_size) <= block_size) {
 431                 ptrs->panel_name.table_size = table_size;
 432                 ptrs->panel_name.offset = size * 16;
 433         }
 434
 435         offset = block - bdb;
 436
 437         for (i = 0; i < 16; i++) {
 438                 ptrs->ptr[i].fp_timing.offset += offset;
 439                 ptrs->ptr[i].dvo_timing.offset += offset;
 440                 ptrs->ptr[i].panel_pnp_id.offset += offset;
 441         }
 442
 443         if (ptrs->panel_name.table_size)
 444                 ptrs->panel_name.offset += offset;
 445
 446         return ptrs_block;
 447 }
 448
 449 static void
 450 init_bdb_block(struct drm_i915_private *i915,
 451                const void *bdb, enum bdb_block_id section_id,
 452                size_t min_size)
 453 {
 454         struct bdb_block_entry *entry;
 455         void *temp_block = NULL;
 456         const void *block;
 457         size_t block_size;
 458
 459         block = find_raw_section(bdb, section_id);
 460
 461         /* Modern VBTs lack the LFP data table pointers block, make one up */
 462         if (!block && section_id == BDB_LVDS_LFP_DATA_PTRS) {
 463                 temp_block = generate_lfp_data_ptrs(i915, bdb);
 464                 if (temp_block)
 465                         block = temp_block + 3;
 466         }
 467         if (!block)
 468                 return;
 469
 470         drm_WARN(&i915->drm, min_size == 0,
 471                  "Block %d min_size is zero\n", section_id);
 472
 473         block_size = get_blocksize(block);
 474
 475         /*
 476          * Version number and new block size are considered
 477          * part of the header for MIPI sequenece block v3+.
 478          */
 479         if (section_id == BDB_MIPI_SEQUENCE && *(const u8 *)block >= 3)
 480                 block_size += 5;
 481
 482         entry = kzalloc(struct_size(entry, data, max(min_size, block_size) + 3),
 483                         GFP_KERNEL);
 484         if (!entry) {
 485                 kfree(temp_block);
 486                 return;
 487         }
 488
 489         entry->section_id = section_id;
 490         memcpy(entry->data, block - 3, block_size + 3);
 491
 492         kfree(temp_block);
 493
 494         drm_dbg_kms(&i915->drm, "Found BDB block %d (size %zu, min size %zu)\n",
 495                     section_id, block_size, min_size);
 496
 497         if (section_id == BDB_LVDS_LFP_DATA_PTRS &&
 498             !fixup_lfp_data_ptrs(bdb, entry->data + 3)) {
 499                 drm_err(&i915->drm, "VBT has malformed LFP data table pointers\n");
 500                 kfree(entry);
 501                 return;
 502         }
 503
 504         list_add_tail(&entry->node, &i915->display.vbt.bdb_blocks);
 505 }
 506
 507 static void init_bdb_blocks(struct drm_i915_private *i915,
 508                             const void *bdb)
 509 {
 510         int i;
 511
 512         for (i = 0; i < ARRAY_SIZE(bdb_blocks); i++) {
 513                 enum bdb_block_id section_id = bdb_blocks[i].section_id;
 514                 size_t min_size = bdb_blocks[i].min_size;
 515
 516                 if (section_id == BDB_LVDS_LFP_DATA)
 517                         min_size = lfp_data_min_size(i915);
 518
 519                 init_bdb_block(i915, bdb, section_id, min_size);
 520         }
 521 }
 522
 523 static void
 524 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
 525                         const struct lvds_dvo_timing *dvo_timing)
 526 {
 527         panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
 528                 dvo_timing->hactive_lo;
 529         panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
 530                 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
 531         panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
 532                 ((dvo_timing->hsync_pulse_width_hi << 8) |
 533                         dvo_timing->hsync_pulse_width_lo);
 534         panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
 535                 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
 536
 537         panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
 538                 dvo_timing->vactive_lo;
 539         panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
 540                 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
 541         panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
 542                 ((dvo_timing->vsync_pulse_width_hi << 4) |
 543                         dvo_timing->vsync_pulse_width_lo);
 544         panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
 545                 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
 546         panel_fixed_mode->clock = dvo_timing->clock * 10;
 547         panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
 548
 549         if (dvo_timing->hsync_positive)
 550                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
 551         else
 552                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
 553
 554         if (dvo_timing->vsync_positive)
 555                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
 556         else
 557                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
 558
 559         panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
 560                 dvo_timing->himage_lo;
 561         panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
 562                 dvo_timing->vimage_lo;
 563
 564         /* Some VBTs have bogus h/vtotal values */
 565         if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
 566                 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
 567         if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
 568                 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
 569
 570         drm_mode_set_name(panel_fixed_mode);
 571 }
 572
 573 static const struct lvds_dvo_timing *
 574 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *data,
 575                     const struct bdb_lvds_lfp_data_ptrs *ptrs,
 576                     int index)
 577 {
 578         return (const void *)data + ptrs->ptr[index].dvo_timing.offset;
 579 }
 580
 581 static const struct lvds_fp_timing *
 582 get_lvds_fp_timing(const struct bdb_lvds_lfp_data *data,
 583                    const struct bdb_lvds_lfp_data_ptrs *ptrs,
 584                    int index)
 585 {
 586         return (const void *)data + ptrs->ptr[index].fp_timing.offset;
 587 }
 588
 589 static const struct lvds_pnp_id *
 590 get_lvds_pnp_id(const struct bdb_lvds_lfp_data *data,
 591                 const struct bdb_lvds_lfp_data_ptrs *ptrs,
 592                 int index)
 593 {
 594         return (const void *)data + ptrs->ptr[index].panel_pnp_id.offset;
 595 }
 596
 597 static const struct bdb_lvds_lfp_data_tail *
 598 get_lfp_data_tail(const struct bdb_lvds_lfp_data *data,
 599                   const struct bdb_lvds_lfp_data_ptrs *ptrs)
 600 {
 601         if (ptrs->panel_name.table_size)
 602                 return (const void *)data + ptrs->panel_name.offset;
 603         else
 604                 return NULL;
 605 }
 606
 607 static void dump_pnp_id(struct drm_i915_private *i915,
 608                         const struct lvds_pnp_id *pnp_id,
 609                         const char *name)
 610 {
 611         u16 mfg_name = be16_to_cpu((__force __be16)pnp_id->mfg_name);
 612         char vend[4];
 613
 614         drm_dbg_kms(&i915->drm, "%s PNPID mfg: %s (0x%x), prod: %u, serial: %u, week: %d, year: %d\n",
 615                     name, drm_edid_decode_mfg_id(mfg_name, vend),
 616                     pnp_id->mfg_name, pnp_id->product_code, pnp_id->serial,
 617                     pnp_id->mfg_week, pnp_id->mfg_year + 1990);
 618 }
 619
 620 static int opregion_get_panel_type(struct drm_i915_private *i915,
 621                                    const struct intel_bios_encoder_data *devdata,
 622                                    const struct drm_edid *drm_edid, bool use_fallback)
 623 {
 624         return intel_opregion_get_panel_type(i915);
 625 }
 626
 627 static int vbt_get_panel_type(struct drm_i915_private *i915,
 628                               const struct intel_bios_encoder_data *devdata,
 629                               const struct drm_edid *drm_edid, bool use_fallback)
 630 {
 631         const struct bdb_lvds_options *lvds_options;
 632
 633         lvds_options = find_section(i915, BDB_LVDS_OPTIONS);
 634         if (!lvds_options)
 635                 return -1;
 636
 637         if (lvds_options->panel_type > 0xf &&
 638             lvds_options->panel_type != 0xff) {
 639                 drm_dbg_kms(&i915->drm, "Invalid VBT panel type 0x%x\n",
 640                             lvds_options->panel_type);
 641                 return -1;
 642         }
 643
 644         if (devdata && devdata->child.handle == DEVICE_HANDLE_LFP2)
 645                 return lvds_options->panel_type2;
 646
 647         drm_WARN_ON(&i915->drm, devdata && devdata->child.handle != DEVICE_HANDLE_LFP1);
 648
 649         return lvds_options->panel_type;
 650 }
 651
 652 static int pnpid_get_panel_type(struct drm_i915_private *i915,
 653                                 const struct intel_bios_encoder_data *devdata,
 654                                 const struct drm_edid *drm_edid, bool use_fallback)
 655 {
 656         const struct bdb_lvds_lfp_data *data;
 657         const struct bdb_lvds_lfp_data_ptrs *ptrs;
 658         const struct lvds_pnp_id *edid_id;
 659         struct lvds_pnp_id edid_id_nodate;
 660         const struct edid *edid = drm_edid_raw(drm_edid); /* FIXME */
 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 drm_edid *drm_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 drm_edid *drm_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 drm_edid *drm_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                                                                           drm_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         panel->vbt.backlight.controller = 0;
1037         if (i915->display.vbt.version >= 191) {
1038                 size_t exp_size;
1039
1040                 if (i915->display.vbt.version >= 236)
1041                         exp_size = sizeof(struct bdb_lfp_backlight_data);
1042                 else if (i915->display.vbt.version >= 234)
1043                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_234;
1044                 else
1045                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_191;
1046
1047                 if (get_blocksize(backlight_data) >= exp_size) {
1048                         const struct lfp_backlight_control_method *method;
1049
1050                         method = &backlight_data->backlight_control[panel_type];
1051                         panel->vbt.backlight.type = method->type;
1052                         panel->vbt.backlight.controller = method->controller;
1053                 }
1054         }
1055
1056         panel->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
1057         panel->vbt.backlight.active_low_pwm = entry->active_low_pwm;
1058
1059         if (i915->display.vbt.version >= 234) {
1060                 u16 min_level;
1061                 bool scale;
1062
1063                 level = backlight_data->brightness_level[panel_type].level;
1064                 min_level = backlight_data->brightness_min_level[panel_type].level;
1065
1066                 if (i915->display.vbt.version >= 236)
1067                         scale = backlight_data->brightness_precision_bits[panel_type] == 16;
1068                 else
1069                         scale = level > 255;
1070
1071                 if (scale)
1072                         min_level = min_level / 255;
1073
1074                 if (min_level > 255) {
1075                         drm_warn(&i915->drm, "Brightness min level > 255\n");
1076                         level = 255;
1077                 }
1078                 panel->vbt.backlight.min_brightness = min_level;
1079
1080                 panel->vbt.backlight.brightness_precision_bits =
1081                         backlight_data->brightness_precision_bits[panel_type];
1082         } else {
1083                 level = backlight_data->level[panel_type];
1084                 panel->vbt.backlight.min_brightness = entry->min_brightness;
1085         }
1086
1087         drm_dbg_kms(&i915->drm,
1088                     "VBT backlight PWM modulation frequency %u Hz, "
1089                     "active %s, min brightness %u, level %u, controller %u\n",
1090                     panel->vbt.backlight.pwm_freq_hz,
1091                     panel->vbt.backlight.active_low_pwm ? "low" : "high",
1092                     panel->vbt.backlight.min_brightness,
1093                     level,
1094                     panel->vbt.backlight.controller);
1095 }
1096
1097 /* Try to find sdvo panel data */
1098 static void
1099 parse_sdvo_panel_data(struct drm_i915_private *i915,
1100                       struct intel_panel *panel)
1101 {
1102         const struct bdb_sdvo_panel_dtds *dtds;
1103         struct drm_display_mode *panel_fixed_mode;
1104         int index;
1105
1106         index = i915->params.vbt_sdvo_panel_type;
1107         if (index == -2) {
1108                 drm_dbg_kms(&i915->drm,
1109                             "Ignore SDVO panel mode from BIOS VBT tables.\n");
1110                 return;
1111         }
1112
1113         if (index == -1) {
1114                 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
1115
1116                 sdvo_lvds_options = find_section(i915, BDB_SDVO_LVDS_OPTIONS);
1117                 if (!sdvo_lvds_options)
1118                         return;
1119
1120                 index = sdvo_lvds_options->panel_type;
1121         }
1122
1123         dtds = find_section(i915, BDB_SDVO_PANEL_DTDS);
1124         if (!dtds)
1125                 return;
1126
1127         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
1128         if (!panel_fixed_mode)
1129                 return;
1130
1131         fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]);
1132
1133         panel->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
1134
1135         drm_dbg_kms(&i915->drm,
1136                     "Found SDVO panel mode in BIOS VBT tables: " DRM_MODE_FMT "\n",
1137                     DRM_MODE_ARG(panel_fixed_mode));
1138 }
1139
1140 static int intel_bios_ssc_frequency(struct drm_i915_private *i915,
1141                                     bool alternate)
1142 {
1143         switch (DISPLAY_VER(i915)) {
1144         case 2:
1145                 return alternate ? 66667 : 48000;
1146         case 3:
1147         case 4:
1148                 return alternate ? 100000 : 96000;
1149         default:
1150                 return alternate ? 100000 : 120000;
1151         }
1152 }
1153
1154 static void
1155 parse_general_features(struct drm_i915_private *i915)
1156 {
1157         const struct bdb_general_features *general;
1158
1159         general = find_section(i915, BDB_GENERAL_FEATURES);
1160         if (!general)
1161                 return;
1162
1163         i915->display.vbt.int_tv_support = general->int_tv_support;
1164         /* int_crt_support can't be trusted on earlier platforms */
1165         if (i915->display.vbt.version >= 155 &&
1166             (HAS_DDI(i915) || IS_VALLEYVIEW(i915)))
1167                 i915->display.vbt.int_crt_support = general->int_crt_support;
1168         i915->display.vbt.lvds_use_ssc = general->enable_ssc;
1169         i915->display.vbt.lvds_ssc_freq =
1170                 intel_bios_ssc_frequency(i915, general->ssc_freq);
1171         i915->display.vbt.display_clock_mode = general->display_clock_mode;
1172         i915->display.vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
1173         if (i915->display.vbt.version >= 181) {
1174                 i915->display.vbt.orientation = general->rotate_180 ?
1175                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
1176                         DRM_MODE_PANEL_ORIENTATION_NORMAL;
1177         } else {
1178                 i915->display.vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
1179         }
1180
1181         if (i915->display.vbt.version >= 249 && general->afc_startup_config) {
1182                 i915->display.vbt.override_afc_startup = true;
1183                 i915->display.vbt.override_afc_startup_val = general->afc_startup_config == 0x1 ? 0x0 : 0x7;
1184         }
1185
1186         drm_dbg_kms(&i915->drm,
1187                     "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",
1188                     i915->display.vbt.int_tv_support,
1189                     i915->display.vbt.int_crt_support,
1190                     i915->display.vbt.lvds_use_ssc,
1191                     i915->display.vbt.lvds_ssc_freq,
1192                     i915->display.vbt.display_clock_mode,
1193                     i915->display.vbt.fdi_rx_polarity_inverted);
1194 }
1195
1196 static const struct child_device_config *
1197 child_device_ptr(const struct bdb_general_definitions *defs, int i)
1198 {
1199         return (const void *) &defs->devices[i * defs->child_dev_size];
1200 }
1201
1202 static void
1203 parse_sdvo_device_mapping(struct drm_i915_private *i915)
1204 {
1205         const struct intel_bios_encoder_data *devdata;
1206         int count = 0;
1207
1208         /*
1209          * Only parse SDVO mappings on gens that could have SDVO. This isn't
1210          * accurate and doesn't have to be, as long as it's not too strict.
1211          */
1212         if (!IS_DISPLAY_VER(i915, 3, 7)) {
1213                 drm_dbg_kms(&i915->drm, "Skipping SDVO device mapping\n");
1214                 return;
1215         }
1216
1217         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
1218                 const struct child_device_config *child = &devdata->child;
1219                 struct sdvo_device_mapping *mapping;
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         u16 block_size;
2078         int index;
2079
2080         if (i915->display.vbt.version < 198)
2081                 return;
2082
2083         params = find_section(i915, BDB_COMPRESSION_PARAMETERS);
2084         if (params) {
2085                 /* Sanity checks */
2086                 if (params->entry_size != sizeof(params->data[0])) {
2087                         drm_dbg_kms(&i915->drm,
2088                                     "VBT: unsupported compression param entry size\n");
2089                         return;
2090                 }
2091
2092                 block_size = get_blocksize(params);
2093                 if (block_size < sizeof(*params)) {
2094                         drm_dbg_kms(&i915->drm,
2095                                     "VBT: expected 16 compression param entries\n");
2096                         return;
2097                 }
2098         }
2099
2100         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
2101                 const struct child_device_config *child = &devdata->child;
2102
2103                 if (!child->compression_enable)
2104                         continue;
2105
2106                 if (!params) {
2107                         drm_dbg_kms(&i915->drm,
2108                                     "VBT: compression params not available\n");
2109                         continue;
2110                 }
2111
2112                 if (child->compression_method_cps) {
2113                         drm_dbg_kms(&i915->drm,
2114                                     "VBT: CPS compression not supported\n");
2115                         continue;
2116                 }
2117
2118                 index = child->compression_structure_index;
2119
2120                 devdata->dsc = kmemdup(&params->data[index],
2121                                        sizeof(*devdata->dsc), GFP_KERNEL);
2122         }
2123 }
2124
2125 static u8 translate_iboost(u8 val)
2126 {
2127         static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
2128
2129         if (val >= ARRAY_SIZE(mapping)) {
2130                 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
2131                 return 0;
2132         }
2133         return mapping[val];
2134 }
2135
2136 static const u8 cnp_ddc_pin_map[] = {
2137         [0] = 0, /* N/A */
2138         [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
2139         [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
2140         [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
2141         [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
2142 };
2143
2144 static const u8 icp_ddc_pin_map[] = {
2145         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2146         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2147         [TGL_DDC_BUS_DDI_C] = GMBUS_PIN_3_BXT,
2148         [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
2149         [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
2150         [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
2151         [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
2152         [TGL_DDC_BUS_PORT_5] = GMBUS_PIN_13_TC5_TGP,
2153         [TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
2154 };
2155
2156 static const u8 rkl_pch_tgp_ddc_pin_map[] = {
2157         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2158         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2159         [RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
2160         [RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
2161 };
2162
2163 static const u8 adls_ddc_pin_map[] = {
2164         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2165         [ADLS_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
2166         [ADLS_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
2167         [ADLS_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
2168         [ADLS_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
2169 };
2170
2171 static const u8 gen9bc_tgp_ddc_pin_map[] = {
2172         [DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2173         [DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
2174         [DDC_BUS_DDI_D] = GMBUS_PIN_10_TC2_ICP,
2175 };
2176
2177 static const u8 adlp_ddc_pin_map[] = {
2178         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
2179         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
2180         [ADLP_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
2181         [ADLP_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
2182         [ADLP_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
2183         [ADLP_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
2184 };
2185
2186 static u8 map_ddc_pin(struct drm_i915_private *i915, u8 vbt_pin)
2187 {
2188         const u8 *ddc_pin_map;
2189         int n_entries;
2190
2191         if (HAS_PCH_MTP(i915) || IS_ALDERLAKE_P(i915)) {
2192                 ddc_pin_map = adlp_ddc_pin_map;
2193                 n_entries = ARRAY_SIZE(adlp_ddc_pin_map);
2194         } else if (IS_ALDERLAKE_S(i915)) {
2195                 ddc_pin_map = adls_ddc_pin_map;
2196                 n_entries = ARRAY_SIZE(adls_ddc_pin_map);
2197         } else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) {
2198                 return vbt_pin;
2199         } else if (IS_ROCKETLAKE(i915) && INTEL_PCH_TYPE(i915) == PCH_TGP) {
2200                 ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
2201                 n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
2202         } else if (HAS_PCH_TGP(i915) && DISPLAY_VER(i915) == 9) {
2203                 ddc_pin_map = gen9bc_tgp_ddc_pin_map;
2204                 n_entries = ARRAY_SIZE(gen9bc_tgp_ddc_pin_map);
2205         } else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) {
2206                 ddc_pin_map = icp_ddc_pin_map;
2207                 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
2208         } else if (HAS_PCH_CNP(i915)) {
2209                 ddc_pin_map = cnp_ddc_pin_map;
2210                 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
2211         } else {
2212                 /* Assuming direct map */
2213                 return vbt_pin;
2214         }
2215
2216         if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
2217                 return ddc_pin_map[vbt_pin];
2218
2219         drm_dbg_kms(&i915->drm,
2220                     "Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
2221                     vbt_pin);
2222         return 0;
2223 }
2224
2225 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
2226 {
2227         enum port port;
2228
2229         if (!ddc_pin)
2230                 return PORT_NONE;
2231
2232         for_each_port(port) {
2233                 const struct intel_bios_encoder_data *devdata =
2234                         i915->display.vbt.ports[port];
2235
2236                 if (devdata && ddc_pin == devdata->child.ddc_pin)
2237                         return port;
2238         }
2239
2240         return PORT_NONE;
2241 }
2242
2243 static void sanitize_ddc_pin(struct intel_bios_encoder_data *devdata,
2244                              enum port port)
2245 {
2246         struct drm_i915_private *i915 = devdata->i915;
2247         struct child_device_config *child;
2248         u8 mapped_ddc_pin;
2249         enum port p;
2250
2251         if (!devdata->child.ddc_pin)
2252                 return;
2253
2254         mapped_ddc_pin = map_ddc_pin(i915, devdata->child.ddc_pin);
2255         if (!intel_gmbus_is_valid_pin(i915, mapped_ddc_pin)) {
2256                 drm_dbg_kms(&i915->drm,
2257                             "Port %c has invalid DDC pin %d, "
2258                             "sticking to defaults\n",
2259                             port_name(port), mapped_ddc_pin);
2260                 devdata->child.ddc_pin = 0;
2261                 return;
2262         }
2263
2264         p = get_port_by_ddc_pin(i915, devdata->child.ddc_pin);
2265         if (p == PORT_NONE)
2266                 return;
2267
2268         drm_dbg_kms(&i915->drm,
2269                     "port %c trying to use the same DDC pin (0x%x) as port %c, "
2270                     "disabling port %c DVI/HDMI support\n",
2271                     port_name(port), mapped_ddc_pin,
2272                     port_name(p), port_name(p));
2273
2274         /*
2275          * If we have multiple ports supposedly sharing the pin, then dvi/hdmi
2276          * couldn't exist on the shared port. Otherwise they share the same ddc
2277          * pin and system couldn't communicate with them separately.
2278          *
2279          * Give inverse child device order the priority, last one wins. Yes,
2280          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
2281          * port A and port E with the same AUX ch and we must pick port E :(
2282          */
2283         child = &i915->display.vbt.ports[p]->child;
2284
2285         child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
2286         child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
2287
2288         child->ddc_pin = 0;
2289 }
2290
2291 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
2292 {
2293         enum port port;
2294
2295         if (!aux_ch)
2296                 return PORT_NONE;
2297
2298         for_each_port(port) {
2299                 const struct intel_bios_encoder_data *devdata =
2300                         i915->display.vbt.ports[port];
2301
2302                 if (devdata && aux_ch == devdata->child.aux_channel)
2303                         return port;
2304         }
2305
2306         return PORT_NONE;
2307 }
2308
2309 static void sanitize_aux_ch(struct intel_bios_encoder_data *devdata,
2310                             enum port port)
2311 {
2312         struct drm_i915_private *i915 = devdata->i915;
2313         struct child_device_config *child;
2314         enum port p;
2315
2316         p = get_port_by_aux_ch(i915, devdata->child.aux_channel);
2317         if (p == PORT_NONE)
2318                 return;
2319
2320         drm_dbg_kms(&i915->drm,
2321                     "port %c trying to use the same AUX CH (0x%x) as port %c, "
2322                     "disabling port %c DP support\n",
2323                     port_name(port), devdata->child.aux_channel,
2324                     port_name(p), port_name(p));
2325
2326         /*
2327          * If we have multiple ports supposedly sharing the aux channel, then DP
2328          * couldn't exist on the shared port. Otherwise they share the same aux
2329          * channel and system couldn't communicate with them separately.
2330          *
2331          * Give inverse child device order the priority, last one wins. Yes,
2332          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
2333          * port A and port E with the same AUX ch and we must pick port E :(
2334          */
2335         child = &i915->display.vbt.ports[p]->child;
2336
2337         child->device_type &= ~DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2338         child->aux_channel = 0;
2339 }
2340
2341 static u8 dvo_port_type(u8 dvo_port)
2342 {
2343         switch (dvo_port) {
2344         case DVO_PORT_HDMIA:
2345         case DVO_PORT_HDMIB:
2346         case DVO_PORT_HDMIC:
2347         case DVO_PORT_HDMID:
2348         case DVO_PORT_HDMIE:
2349         case DVO_PORT_HDMIF:
2350         case DVO_PORT_HDMIG:
2351         case DVO_PORT_HDMIH:
2352         case DVO_PORT_HDMII:
2353                 return DVO_PORT_HDMIA;
2354         case DVO_PORT_DPA:
2355         case DVO_PORT_DPB:
2356         case DVO_PORT_DPC:
2357         case DVO_PORT_DPD:
2358         case DVO_PORT_DPE:
2359         case DVO_PORT_DPF:
2360         case DVO_PORT_DPG:
2361         case DVO_PORT_DPH:
2362         case DVO_PORT_DPI:
2363                 return DVO_PORT_DPA;
2364         case DVO_PORT_MIPIA:
2365         case DVO_PORT_MIPIB:
2366         case DVO_PORT_MIPIC:
2367         case DVO_PORT_MIPID:
2368                 return DVO_PORT_MIPIA;
2369         default:
2370                 return dvo_port;
2371         }
2372 }
2373
2374 static enum port __dvo_port_to_port(int n_ports, int n_dvo,
2375                                     const int port_mapping[][3], u8 dvo_port)
2376 {
2377         enum port port;
2378         int i;
2379
2380         for (port = PORT_A; port < n_ports; port++) {
2381                 for (i = 0; i < n_dvo; i++) {
2382                         if (port_mapping[port][i] == -1)
2383                                 break;
2384
2385                         if (dvo_port == port_mapping[port][i])
2386                                 return port;
2387                 }
2388         }
2389
2390         return PORT_NONE;
2391 }
2392
2393 static enum port dvo_port_to_port(struct drm_i915_private *i915,
2394                                   u8 dvo_port)
2395 {
2396         /*
2397          * Each DDI port can have more than one value on the "DVO Port" field,
2398          * so look for all the possible values for each port.
2399          */
2400         static const int port_mapping[][3] = {
2401                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2402                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2403                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2404                 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2405                 [PORT_E] = { DVO_PORT_HDMIE, DVO_PORT_DPE, DVO_PORT_CRT },
2406                 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
2407                 [PORT_G] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
2408                 [PORT_H] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
2409                 [PORT_I] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
2410         };
2411         /*
2412          * RKL VBT uses PHY based mapping. Combo PHYs A,B,C,D
2413          * map to DDI A,B,TC1,TC2 respectively.
2414          */
2415         static const int rkl_port_mapping[][3] = {
2416                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2417                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2418                 [PORT_C] = { -1 },
2419                 [PORT_TC1] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2420                 [PORT_TC2] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2421         };
2422         /*
2423          * Alderlake S ports used in the driver are PORT_A, PORT_D, PORT_E,
2424          * PORT_F and PORT_G, we need to map that to correct VBT sections.
2425          */
2426         static const int adls_port_mapping[][3] = {
2427                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2428                 [PORT_B] = { -1 },
2429                 [PORT_C] = { -1 },
2430                 [PORT_TC1] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2431                 [PORT_TC2] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2432                 [PORT_TC3] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2433                 [PORT_TC4] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
2434         };
2435         static const int xelpd_port_mapping[][3] = {
2436                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
2437                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
2438                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
2439                 [PORT_D_XELPD] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
2440                 [PORT_E_XELPD] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
2441                 [PORT_TC1] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
2442                 [PORT_TC2] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
2443                 [PORT_TC3] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
2444                 [PORT_TC4] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
2445         };
2446
2447         if (DISPLAY_VER(i915) >= 13)
2448                 return __dvo_port_to_port(ARRAY_SIZE(xelpd_port_mapping),
2449                                           ARRAY_SIZE(xelpd_port_mapping[0]),
2450                                           xelpd_port_mapping,
2451                                           dvo_port);
2452         else if (IS_ALDERLAKE_S(i915))
2453                 return __dvo_port_to_port(ARRAY_SIZE(adls_port_mapping),
2454                                           ARRAY_SIZE(adls_port_mapping[0]),
2455                                           adls_port_mapping,
2456                                           dvo_port);
2457         else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2458                 return __dvo_port_to_port(ARRAY_SIZE(rkl_port_mapping),
2459                                           ARRAY_SIZE(rkl_port_mapping[0]),
2460                                           rkl_port_mapping,
2461                                           dvo_port);
2462         else
2463                 return __dvo_port_to_port(ARRAY_SIZE(port_mapping),
2464                                           ARRAY_SIZE(port_mapping[0]),
2465                                           port_mapping,
2466                                           dvo_port);
2467 }
2468
2469 static enum port
2470 dsi_dvo_port_to_port(struct drm_i915_private *i915, u8 dvo_port)
2471 {
2472         switch (dvo_port) {
2473         case DVO_PORT_MIPIA:
2474                 return PORT_A;
2475         case DVO_PORT_MIPIC:
2476                 if (DISPLAY_VER(i915) >= 11)
2477                         return PORT_B;
2478                 else
2479                         return PORT_C;
2480         default:
2481                 return PORT_NONE;
2482         }
2483 }
2484
2485 static int parse_bdb_230_dp_max_link_rate(const int vbt_max_link_rate)
2486 {
2487         switch (vbt_max_link_rate) {
2488         default:
2489         case BDB_230_VBT_DP_MAX_LINK_RATE_DEF:
2490                 return 0;
2491         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20:
2492                 return 2000000;
2493         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5:
2494                 return 1350000;
2495         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10:
2496                 return 1000000;
2497         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3:
2498                 return 810000;
2499         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2:
2500                 return 540000;
2501         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR:
2502                 return 270000;
2503         case BDB_230_VBT_DP_MAX_LINK_RATE_LBR:
2504                 return 162000;
2505         }
2506 }
2507
2508 static int parse_bdb_216_dp_max_link_rate(const int vbt_max_link_rate)
2509 {
2510         switch (vbt_max_link_rate) {
2511         default:
2512         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3:
2513                 return 810000;
2514         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2:
2515                 return 540000;
2516         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR:
2517                 return 270000;
2518         case BDB_216_VBT_DP_MAX_LINK_RATE_LBR:
2519                 return 162000;
2520         }
2521 }
2522
2523 static int _intel_bios_dp_max_link_rate(const struct intel_bios_encoder_data *devdata)
2524 {
2525         if (!devdata || devdata->i915->display.vbt.version < 216)
2526                 return 0;
2527
2528         if (devdata->i915->display.vbt.version >= 230)
2529                 return parse_bdb_230_dp_max_link_rate(devdata->child.dp_max_link_rate);
2530         else
2531                 return parse_bdb_216_dp_max_link_rate(devdata->child.dp_max_link_rate);
2532 }
2533
2534 static int _intel_bios_dp_max_lane_count(const struct intel_bios_encoder_data *devdata)
2535 {
2536         if (!devdata || devdata->i915->display.vbt.version < 244)
2537                 return 0;
2538
2539         return devdata->child.dp_max_lane_count + 1;
2540 }
2541
2542 static void sanitize_device_type(struct intel_bios_encoder_data *devdata,
2543                                  enum port port)
2544 {
2545         struct drm_i915_private *i915 = devdata->i915;
2546         bool is_hdmi;
2547
2548         if (port != PORT_A || DISPLAY_VER(i915) >= 12)
2549                 return;
2550
2551         if (!intel_bios_encoder_supports_dvi(devdata))
2552                 return;
2553
2554         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
2555
2556         drm_dbg_kms(&i915->drm, "VBT claims port A supports DVI%s, ignoring\n",
2557                     is_hdmi ? "/HDMI" : "");
2558
2559         devdata->child.device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
2560         devdata->child.device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
2561 }
2562
2563 static bool
2564 intel_bios_encoder_supports_crt(const struct intel_bios_encoder_data *devdata)
2565 {
2566         return devdata->child.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
2567 }
2568
2569 bool
2570 intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata)
2571 {
2572         return devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
2573 }
2574
2575 bool
2576 intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata)
2577 {
2578         return intel_bios_encoder_supports_dvi(devdata) &&
2579                 (devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
2580 }
2581
2582 bool
2583 intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata)
2584 {
2585         return devdata->child.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2586 }
2587
2588 static bool
2589 intel_bios_encoder_supports_edp(const struct intel_bios_encoder_data *devdata)
2590 {
2591         return intel_bios_encoder_supports_dp(devdata) &&
2592                 devdata->child.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR;
2593 }
2594
2595 static bool
2596 intel_bios_encoder_supports_dsi(const struct intel_bios_encoder_data *devdata)
2597 {
2598         return devdata->child.device_type & DEVICE_TYPE_MIPI_OUTPUT;
2599 }
2600
2601 bool
2602 intel_bios_encoder_is_lspcon(const struct intel_bios_encoder_data *devdata)
2603 {
2604         return devdata && HAS_LSPCON(devdata->i915) && devdata->child.lspcon;
2605 }
2606
2607 static int _intel_bios_hdmi_level_shift(const struct intel_bios_encoder_data *devdata)
2608 {
2609         if (!devdata || devdata->i915->display.vbt.version < 158)
2610                 return -1;
2611
2612         return devdata->child.hdmi_level_shifter_value;
2613 }
2614
2615 static int _intel_bios_max_tmds_clock(const struct intel_bios_encoder_data *devdata)
2616 {
2617         if (!devdata || devdata->i915->display.vbt.version < 204)
2618                 return 0;
2619
2620         switch (devdata->child.hdmi_max_data_rate) {
2621         default:
2622                 MISSING_CASE(devdata->child.hdmi_max_data_rate);
2623                 fallthrough;
2624         case HDMI_MAX_DATA_RATE_PLATFORM:
2625                 return 0;
2626         case HDMI_MAX_DATA_RATE_594:
2627                 return 594000;
2628         case HDMI_MAX_DATA_RATE_340:
2629                 return 340000;
2630         case HDMI_MAX_DATA_RATE_300:
2631                 return 300000;
2632         case HDMI_MAX_DATA_RATE_297:
2633                 return 297000;
2634         case HDMI_MAX_DATA_RATE_165:
2635                 return 165000;
2636         }
2637 }
2638
2639 static bool is_port_valid(struct drm_i915_private *i915, enum port port)
2640 {
2641         /*
2642          * On some ICL SKUs port F is not present, but broken VBTs mark
2643          * the port as present. Only try to initialize port F for the
2644          * SKUs that may actually have it.
2645          */
2646         if (port == PORT_F && IS_ICELAKE(i915))
2647                 return IS_ICL_WITH_PORT_F(i915);
2648
2649         return true;
2650 }
2651
2652 static void print_ddi_port(const struct intel_bios_encoder_data *devdata,
2653                            enum port port)
2654 {
2655         struct drm_i915_private *i915 = devdata->i915;
2656         const struct child_device_config *child = &devdata->child;
2657         bool is_dvi, is_hdmi, is_dp, is_edp, is_dsi, is_crt, supports_typec_usb, supports_tbt;
2658         int dp_boost_level, dp_max_link_rate, hdmi_boost_level, hdmi_level_shift, max_tmds_clock;
2659
2660         is_dvi = intel_bios_encoder_supports_dvi(devdata);
2661         is_dp = intel_bios_encoder_supports_dp(devdata);
2662         is_crt = intel_bios_encoder_supports_crt(devdata);
2663         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
2664         is_edp = intel_bios_encoder_supports_edp(devdata);
2665         is_dsi = intel_bios_encoder_supports_dsi(devdata);
2666
2667         supports_typec_usb = intel_bios_encoder_supports_typec_usb(devdata);
2668         supports_tbt = intel_bios_encoder_supports_tbt(devdata);
2669
2670         drm_dbg_kms(&i915->drm,
2671                     "Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d DSI:%d LSPCON:%d USB-Type-C:%d TBT:%d DSC:%d\n",
2672                     port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp, is_dsi,
2673                     intel_bios_encoder_is_lspcon(devdata),
2674                     supports_typec_usb, supports_tbt,
2675                     devdata->dsc != NULL);
2676
2677         hdmi_level_shift = _intel_bios_hdmi_level_shift(devdata);
2678         if (hdmi_level_shift >= 0) {
2679                 drm_dbg_kms(&i915->drm,
2680                             "Port %c VBT HDMI level shift: %d\n",
2681                             port_name(port), hdmi_level_shift);
2682         }
2683
2684         max_tmds_clock = _intel_bios_max_tmds_clock(devdata);
2685         if (max_tmds_clock)
2686                 drm_dbg_kms(&i915->drm,
2687                             "Port %c VBT HDMI max TMDS clock: %d kHz\n",
2688                             port_name(port), max_tmds_clock);
2689
2690         /* I_boost config for SKL and above */
2691         dp_boost_level = intel_bios_encoder_dp_boost_level(devdata);
2692         if (dp_boost_level)
2693                 drm_dbg_kms(&i915->drm,
2694                             "Port %c VBT (e)DP boost level: %d\n",
2695                             port_name(port), dp_boost_level);
2696
2697         hdmi_boost_level = intel_bios_encoder_hdmi_boost_level(devdata);
2698         if (hdmi_boost_level)
2699                 drm_dbg_kms(&i915->drm,
2700                             "Port %c VBT HDMI boost level: %d\n",
2701                             port_name(port), hdmi_boost_level);
2702
2703         dp_max_link_rate = _intel_bios_dp_max_link_rate(devdata);
2704         if (dp_max_link_rate)
2705                 drm_dbg_kms(&i915->drm,
2706                             "Port %c VBT DP max link rate: %d\n",
2707                             port_name(port), dp_max_link_rate);
2708
2709         /*
2710          * FIXME need to implement support for VBT
2711          * vswing/preemph tables should this ever trigger.
2712          */
2713         drm_WARN(&i915->drm, child->use_vbt_vswing,
2714                  "Port %c asks to use VBT vswing/preemph tables\n",
2715                  port_name(port));
2716 }
2717
2718 static void parse_ddi_port(struct intel_bios_encoder_data *devdata)
2719 {
2720         struct drm_i915_private *i915 = devdata->i915;
2721         const struct child_device_config *child = &devdata->child;
2722         enum port port;
2723
2724         port = dvo_port_to_port(i915, child->dvo_port);
2725         if (port == PORT_NONE && DISPLAY_VER(i915) >= 11)
2726                 port = dsi_dvo_port_to_port(i915, child->dvo_port);
2727         if (port == PORT_NONE)
2728                 return;
2729
2730         if (!is_port_valid(i915, port)) {
2731                 drm_dbg_kms(&i915->drm,
2732                             "VBT reports port %c as supported, but that can't be true: skipping\n",
2733                             port_name(port));
2734                 return;
2735         }
2736
2737         if (i915->display.vbt.ports[port]) {
2738                 drm_dbg_kms(&i915->drm,
2739                             "More than one child device for port %c in VBT, using the first.\n",
2740                             port_name(port));
2741                 return;
2742         }
2743
2744         sanitize_device_type(devdata, port);
2745
2746         if (intel_bios_encoder_supports_dvi(devdata))
2747                 sanitize_ddc_pin(devdata, port);
2748
2749         if (intel_bios_encoder_supports_dp(devdata))
2750                 sanitize_aux_ch(devdata, port);
2751
2752         i915->display.vbt.ports[port] = devdata;
2753 }
2754
2755 static bool has_ddi_port_info(struct drm_i915_private *i915)
2756 {
2757         return DISPLAY_VER(i915) >= 5 || IS_G4X(i915);
2758 }
2759
2760 static void parse_ddi_ports(struct drm_i915_private *i915)
2761 {
2762         struct intel_bios_encoder_data *devdata;
2763         enum port port;
2764
2765         if (!has_ddi_port_info(i915))
2766                 return;
2767
2768         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node)
2769                 parse_ddi_port(devdata);
2770
2771         for_each_port(port) {
2772                 if (i915->display.vbt.ports[port])
2773                         print_ddi_port(i915->display.vbt.ports[port], port);
2774         }
2775 }
2776
2777 static void
2778 parse_general_definitions(struct drm_i915_private *i915)
2779 {
2780         const struct bdb_general_definitions *defs;
2781         struct intel_bios_encoder_data *devdata;
2782         const struct child_device_config *child;
2783         int i, child_device_num;
2784         u8 expected_size;
2785         u16 block_size;
2786         int bus_pin;
2787
2788         defs = find_section(i915, BDB_GENERAL_DEFINITIONS);
2789         if (!defs) {
2790                 drm_dbg_kms(&i915->drm,
2791                             "No general definition block is found, no devices defined.\n");
2792                 return;
2793         }
2794
2795         block_size = get_blocksize(defs);
2796         if (block_size < sizeof(*defs)) {
2797                 drm_dbg_kms(&i915->drm,
2798                             "General definitions block too small (%u)\n",
2799                             block_size);
2800                 return;
2801         }
2802
2803         bus_pin = defs->crt_ddc_gmbus_pin;
2804         drm_dbg_kms(&i915->drm, "crt_ddc_bus_pin: %d\n", bus_pin);
2805         if (intel_gmbus_is_valid_pin(i915, bus_pin))
2806                 i915->display.vbt.crt_ddc_pin = bus_pin;
2807
2808         if (i915->display.vbt.version < 106) {
2809                 expected_size = 22;
2810         } else if (i915->display.vbt.version < 111) {
2811                 expected_size = 27;
2812         } else if (i915->display.vbt.version < 195) {
2813                 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
2814         } else if (i915->display.vbt.version == 195) {
2815                 expected_size = 37;
2816         } else if (i915->display.vbt.version <= 215) {
2817                 expected_size = 38;
2818         } else if (i915->display.vbt.version <= 237) {
2819                 expected_size = 39;
2820         } else {
2821                 expected_size = sizeof(*child);
2822                 BUILD_BUG_ON(sizeof(*child) < 39);
2823                 drm_dbg(&i915->drm,
2824                         "Expected child device config size for VBT version %u not known; assuming %u\n",
2825                         i915->display.vbt.version, expected_size);
2826         }
2827
2828         /* Flag an error for unexpected size, but continue anyway. */
2829         if (defs->child_dev_size != expected_size)
2830                 drm_err(&i915->drm,
2831                         "Unexpected child device config size %u (expected %u for VBT version %u)\n",
2832                         defs->child_dev_size, expected_size, i915->display.vbt.version);
2833
2834         /* The legacy sized child device config is the minimum we need. */
2835         if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
2836                 drm_dbg_kms(&i915->drm,
2837                             "Child device config size %u is too small.\n",
2838                             defs->child_dev_size);
2839                 return;
2840         }
2841
2842         /* get the number of child device */
2843         child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
2844
2845         for (i = 0; i < child_device_num; i++) {
2846                 child = child_device_ptr(defs, i);
2847                 if (!child->device_type)
2848                         continue;
2849
2850                 drm_dbg_kms(&i915->drm,
2851                             "Found VBT child device with type 0x%x\n",
2852                             child->device_type);
2853
2854                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2855                 if (!devdata)
2856                         break;
2857
2858                 devdata->i915 = i915;
2859
2860                 /*
2861                  * Copy as much as we know (sizeof) and is available
2862                  * (child_dev_size) of the child device config. Accessing the
2863                  * data must depend on VBT version.
2864                  */
2865                 memcpy(&devdata->child, child,
2866                        min_t(size_t, defs->child_dev_size, sizeof(*child)));
2867
2868                 list_add_tail(&devdata->node, &i915->display.vbt.display_devices);
2869         }
2870
2871         if (list_empty(&i915->display.vbt.display_devices))
2872                 drm_dbg_kms(&i915->drm,
2873                             "no child dev is parsed from VBT\n");
2874 }
2875
2876 /* Common defaults which may be overridden by VBT. */
2877 static void
2878 init_vbt_defaults(struct drm_i915_private *i915)
2879 {
2880         i915->display.vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2881
2882         /* general features */
2883         i915->display.vbt.int_tv_support = 1;
2884         i915->display.vbt.int_crt_support = 1;
2885
2886         /* driver features */
2887         i915->display.vbt.int_lvds_support = 1;
2888
2889         /* Default to using SSC */
2890         i915->display.vbt.lvds_use_ssc = 1;
2891         /*
2892          * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
2893          * clock for LVDS.
2894          */
2895         i915->display.vbt.lvds_ssc_freq = intel_bios_ssc_frequency(i915,
2896                                                                    !HAS_PCH_SPLIT(i915));
2897         drm_dbg_kms(&i915->drm, "Set default to SSC at %d kHz\n",
2898                     i915->display.vbt.lvds_ssc_freq);
2899 }
2900
2901 /* Common defaults which may be overridden by VBT. */
2902 static void
2903 init_vbt_panel_defaults(struct intel_panel *panel)
2904 {
2905         /* Default to having backlight */
2906         panel->vbt.backlight.present = true;
2907
2908         /* LFP panel data */
2909         panel->vbt.lvds_dither = true;
2910 }
2911
2912 /* Defaults to initialize only if there is no VBT. */
2913 static void
2914 init_vbt_missing_defaults(struct drm_i915_private *i915)
2915 {
2916         enum port port;
2917         int ports = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) |
2918                     BIT(PORT_D) | BIT(PORT_E) | BIT(PORT_F);
2919
2920         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
2921                 return;
2922
2923         for_each_port_masked(port, ports) {
2924                 struct intel_bios_encoder_data *devdata;
2925                 struct child_device_config *child;
2926                 enum phy phy = intel_port_to_phy(i915, port);
2927
2928                 /*
2929                  * VBT has the TypeC mode (native,TBT/USB) and we don't want
2930                  * to detect it.
2931                  */
2932                 if (intel_phy_is_tc(i915, phy))
2933                         continue;
2934
2935                 /* Create fake child device config */
2936                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2937                 if (!devdata)
2938                         break;
2939
2940                 devdata->i915 = i915;
2941                 child = &devdata->child;
2942
2943                 if (port == PORT_F)
2944                         child->dvo_port = DVO_PORT_HDMIF;
2945                 else if (port == PORT_E)
2946                         child->dvo_port = DVO_PORT_HDMIE;
2947                 else
2948                         child->dvo_port = DVO_PORT_HDMIA + port;
2949
2950                 if (port != PORT_A && port != PORT_E)
2951                         child->device_type |= DEVICE_TYPE_TMDS_DVI_SIGNALING;
2952
2953                 if (port != PORT_E)
2954                         child->device_type |= DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2955
2956                 if (port == PORT_A)
2957                         child->device_type |= DEVICE_TYPE_INTERNAL_CONNECTOR;
2958
2959                 list_add_tail(&devdata->node, &i915->display.vbt.display_devices);
2960
2961                 drm_dbg_kms(&i915->drm,
2962                             "Generating default VBT child device with type 0x04%x on port %c\n",
2963                             child->device_type, port_name(port));
2964         }
2965
2966         /* Bypass some minimum baseline VBT version checks */
2967         i915->display.vbt.version = 155;
2968 }
2969
2970 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
2971 {
2972         const void *_vbt = vbt;
2973
2974         return _vbt + vbt->bdb_offset;
2975 }
2976
2977 /**
2978  * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
2979  * @buf:        pointer to a buffer to validate
2980  * @size:       size of the buffer
2981  *
2982  * Returns true on valid VBT.
2983  */
2984 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
2985 {
2986         const struct vbt_header *vbt = buf;
2987         const struct bdb_header *bdb;
2988
2989         if (!vbt)
2990                 return false;
2991
2992         if (sizeof(struct vbt_header) > size) {
2993                 DRM_DEBUG_DRIVER("VBT header incomplete\n");
2994                 return false;
2995         }
2996
2997         if (memcmp(vbt->signature, "$VBT", 4)) {
2998                 DRM_DEBUG_DRIVER("VBT invalid signature\n");
2999                 return false;
3000         }
3001
3002         if (vbt->vbt_size > size) {
3003                 DRM_DEBUG_DRIVER("VBT incomplete (vbt_size overflows)\n");
3004                 return false;
3005         }
3006
3007         size = vbt->vbt_size;
3008
3009         if (range_overflows_t(size_t,
3010                               vbt->bdb_offset,
3011                               sizeof(struct bdb_header),
3012                               size)) {
3013                 DRM_DEBUG_DRIVER("BDB header incomplete\n");
3014                 return false;
3015         }
3016
3017         bdb = get_bdb_header(vbt);
3018         if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
3019                 DRM_DEBUG_DRIVER("BDB incomplete\n");
3020                 return false;
3021         }
3022
3023         return vbt;
3024 }
3025
3026 static struct vbt_header *spi_oprom_get_vbt(struct drm_i915_private *i915)
3027 {
3028         u32 count, data, found, store = 0;
3029         u32 static_region, oprom_offset;
3030         u32 oprom_size = 0x200000;
3031         u16 vbt_size;
3032         u32 *vbt;
3033
3034         static_region = intel_uncore_read(&i915->uncore, SPI_STATIC_REGIONS);
3035         static_region &= OPTIONROM_SPI_REGIONID_MASK;
3036         intel_uncore_write(&i915->uncore, PRIMARY_SPI_REGIONID, static_region);
3037
3038         oprom_offset = intel_uncore_read(&i915->uncore, OROM_OFFSET);
3039         oprom_offset &= OROM_OFFSET_MASK;
3040
3041         for (count = 0; count < oprom_size; count += 4) {
3042                 intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, oprom_offset + count);
3043                 data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3044
3045                 if (data == *((const u32 *)"$VBT")) {
3046                         found = oprom_offset + count;
3047                         break;
3048                 }
3049         }
3050
3051         if (count >= oprom_size)
3052                 goto err_not_found;
3053
3054         /* Get VBT size and allocate space for the VBT */
3055         intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found +
3056                    offsetof(struct vbt_header, vbt_size));
3057         vbt_size = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3058         vbt_size &= 0xffff;
3059
3060         vbt = kzalloc(round_up(vbt_size, 4), GFP_KERNEL);
3061         if (!vbt)
3062                 goto err_not_found;
3063
3064         for (count = 0; count < vbt_size; count += 4) {
3065                 intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found + count);
3066                 data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER);
3067                 *(vbt + store++) = data;
3068         }
3069
3070         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
3071                 goto err_free_vbt;
3072
3073         drm_dbg_kms(&i915->drm, "Found valid VBT in SPI flash\n");
3074
3075         return (struct vbt_header *)vbt;
3076
3077 err_free_vbt:
3078         kfree(vbt);
3079 err_not_found:
3080         return NULL;
3081 }
3082
3083 static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915)
3084 {
3085         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
3086         void __iomem *p = NULL, *oprom;
3087         struct vbt_header *vbt;
3088         u16 vbt_size;
3089         size_t i, size;
3090
3091         oprom = pci_map_rom(pdev, &size);
3092         if (!oprom)
3093                 return NULL;
3094
3095         /* Scour memory looking for the VBT signature. */
3096         for (i = 0; i + 4 < size; i += 4) {
3097                 if (ioread32(oprom + i) != *((const u32 *)"$VBT"))
3098                         continue;
3099
3100                 p = oprom + i;
3101                 size -= i;
3102                 break;
3103         }
3104
3105         if (!p)
3106                 goto err_unmap_oprom;
3107
3108         if (sizeof(struct vbt_header) > size) {
3109                 drm_dbg(&i915->drm, "VBT header incomplete\n");
3110                 goto err_unmap_oprom;
3111         }
3112
3113         vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
3114         if (vbt_size > size) {
3115                 drm_dbg(&i915->drm,
3116                         "VBT incomplete (vbt_size overflows)\n");
3117                 goto err_unmap_oprom;
3118         }
3119
3120         /* The rest will be validated by intel_bios_is_valid_vbt() */
3121         vbt = kmalloc(vbt_size, GFP_KERNEL);
3122         if (!vbt)
3123                 goto err_unmap_oprom;
3124
3125         memcpy_fromio(vbt, p, vbt_size);
3126
3127         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
3128                 goto err_free_vbt;
3129
3130         pci_unmap_rom(pdev, oprom);
3131
3132         drm_dbg_kms(&i915->drm, "Found valid VBT in PCI ROM\n");
3133
3134         return vbt;
3135
3136 err_free_vbt:
3137         kfree(vbt);
3138 err_unmap_oprom:
3139         pci_unmap_rom(pdev, oprom);
3140
3141         return NULL;
3142 }
3143
3144 /**
3145  * intel_bios_init - find VBT and initialize settings from the BIOS
3146  * @i915: i915 device instance
3147  *
3148  * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
3149  * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
3150  * initialize some defaults if the VBT is not present at all.
3151  */
3152 void intel_bios_init(struct drm_i915_private *i915)
3153 {
3154         const struct vbt_header *vbt = i915->display.opregion.vbt;
3155         struct vbt_header *oprom_vbt = NULL;
3156         const struct bdb_header *bdb;
3157
3158         INIT_LIST_HEAD(&i915->display.vbt.display_devices);
3159         INIT_LIST_HEAD(&i915->display.vbt.bdb_blocks);
3160
3161         if (!HAS_DISPLAY(i915)) {
3162                 drm_dbg_kms(&i915->drm,
3163                             "Skipping VBT init due to disabled display.\n");
3164                 return;
3165         }
3166
3167         init_vbt_defaults(i915);
3168
3169         /*
3170          * If the OpRegion does not have VBT, look in SPI flash through MMIO or
3171          * PCI mapping
3172          */
3173         if (!vbt && IS_DGFX(i915)) {
3174                 oprom_vbt = spi_oprom_get_vbt(i915);
3175                 vbt = oprom_vbt;
3176         }
3177
3178         if (!vbt) {
3179                 oprom_vbt = oprom_get_vbt(i915);
3180                 vbt = oprom_vbt;
3181         }
3182
3183         if (!vbt)
3184                 goto out;
3185
3186         bdb = get_bdb_header(vbt);
3187         i915->display.vbt.version = bdb->version;
3188
3189         drm_dbg_kms(&i915->drm,
3190                     "VBT signature \"%.*s\", BDB version %d\n",
3191                     (int)sizeof(vbt->signature), vbt->signature, i915->display.vbt.version);
3192
3193         init_bdb_blocks(i915, bdb);
3194
3195         /* Grab useful general definitions */
3196         parse_general_features(i915);
3197         parse_general_definitions(i915);
3198         parse_driver_features(i915);
3199
3200         /* Depends on child device list */
3201         parse_compression_parameters(i915);
3202
3203 out:
3204         if (!vbt) {
3205                 drm_info(&i915->drm,
3206                          "Failed to find VBIOS tables (VBT)\n");
3207                 init_vbt_missing_defaults(i915);
3208         }
3209
3210         /* Further processing on pre-parsed or generated child device data */
3211         parse_sdvo_device_mapping(i915);
3212         parse_ddi_ports(i915);
3213
3214         kfree(oprom_vbt);
3215 }
3216
3217 static void intel_bios_init_panel(struct drm_i915_private *i915,
3218                                   struct intel_panel *panel,
3219                                   const struct intel_bios_encoder_data *devdata,
3220                                   const struct drm_edid *drm_edid,
3221                                   bool use_fallback)
3222 {
3223         /* already have it? */
3224         if (panel->vbt.panel_type >= 0) {
3225                 drm_WARN_ON(&i915->drm, !use_fallback);
3226                 return;
3227         }
3228
3229         panel->vbt.panel_type = get_panel_type(i915, devdata,
3230                                                drm_edid, use_fallback);
3231         if (panel->vbt.panel_type < 0) {
3232                 drm_WARN_ON(&i915->drm, use_fallback);
3233                 return;
3234         }
3235
3236         init_vbt_panel_defaults(panel);
3237
3238         parse_panel_options(i915, panel);
3239         parse_generic_dtd(i915, panel);
3240         parse_lfp_data(i915, panel);
3241         parse_lfp_backlight(i915, panel);
3242         parse_sdvo_panel_data(i915, panel);
3243         parse_panel_driver_features(i915, panel);
3244         parse_power_conservation_features(i915, panel);
3245         parse_edp(i915, panel);
3246         parse_psr(i915, panel);
3247         parse_mipi_config(i915, panel);
3248         parse_mipi_sequence(i915, panel);
3249 }
3250
3251 void intel_bios_init_panel_early(struct drm_i915_private *i915,
3252                                  struct intel_panel *panel,
3253                                  const struct intel_bios_encoder_data *devdata)
3254 {
3255         intel_bios_init_panel(i915, panel, devdata, NULL, false);
3256 }
3257
3258 void intel_bios_init_panel_late(struct drm_i915_private *i915,
3259                                 struct intel_panel *panel,
3260                                 const struct intel_bios_encoder_data *devdata,
3261                                 const struct drm_edid *drm_edid)
3262 {
3263         intel_bios_init_panel(i915, panel, devdata, drm_edid, true);
3264 }
3265
3266 /**
3267  * intel_bios_driver_remove - Free any resources allocated by intel_bios_init()
3268  * @i915: i915 device instance
3269  */
3270 void intel_bios_driver_remove(struct drm_i915_private *i915)
3271 {
3272         struct intel_bios_encoder_data *devdata, *nd;
3273         struct bdb_block_entry *entry, *ne;
3274
3275         list_for_each_entry_safe(devdata, nd, &i915->display.vbt.display_devices, node) {
3276                 list_del(&devdata->node);
3277                 kfree(devdata->dsc);
3278                 kfree(devdata);
3279         }
3280
3281         list_for_each_entry_safe(entry, ne, &i915->display.vbt.bdb_blocks, node) {
3282                 list_del(&entry->node);
3283                 kfree(entry);
3284         }
3285 }
3286
3287 void intel_bios_fini_panel(struct intel_panel *panel)
3288 {
3289         kfree(panel->vbt.sdvo_lvds_vbt_mode);
3290         panel->vbt.sdvo_lvds_vbt_mode = NULL;
3291         kfree(panel->vbt.lfp_lvds_vbt_mode);
3292         panel->vbt.lfp_lvds_vbt_mode = NULL;
3293         kfree(panel->vbt.dsi.data);
3294         panel->vbt.dsi.data = NULL;
3295         kfree(panel->vbt.dsi.pps);
3296         panel->vbt.dsi.pps = NULL;
3297         kfree(panel->vbt.dsi.config);
3298         panel->vbt.dsi.config = NULL;
3299         kfree(panel->vbt.dsi.deassert_seq);
3300         panel->vbt.dsi.deassert_seq = NULL;
3301 }
3302
3303 /**
3304  * intel_bios_is_tv_present - is integrated TV present in VBT
3305  * @i915: i915 device instance
3306  *
3307  * Return true if TV is present. If no child devices were parsed from VBT,
3308  * assume TV is present.
3309  */
3310 bool intel_bios_is_tv_present(struct drm_i915_private *i915)
3311 {
3312         const struct intel_bios_encoder_data *devdata;
3313
3314         if (!i915->display.vbt.int_tv_support)
3315                 return false;
3316
3317         if (list_empty(&i915->display.vbt.display_devices))
3318                 return true;
3319
3320         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3321                 const struct child_device_config *child = &devdata->child;
3322
3323                 /*
3324                  * If the device type is not TV, continue.
3325                  */
3326                 switch (child->device_type) {
3327                 case DEVICE_TYPE_INT_TV:
3328                 case DEVICE_TYPE_TV:
3329                 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
3330                         break;
3331                 default:
3332                         continue;
3333                 }
3334                 /* Only when the addin_offset is non-zero, it is regarded
3335                  * as present.
3336                  */
3337                 if (child->addin_offset)
3338                         return true;
3339         }
3340
3341         return false;
3342 }
3343
3344 /**
3345  * intel_bios_is_lvds_present - is LVDS present in VBT
3346  * @i915:       i915 device instance
3347  * @i2c_pin:    i2c pin for LVDS if present
3348  *
3349  * Return true if LVDS is present. If no child devices were parsed from VBT,
3350  * assume LVDS is present.
3351  */
3352 bool intel_bios_is_lvds_present(struct drm_i915_private *i915, u8 *i2c_pin)
3353 {
3354         const struct intel_bios_encoder_data *devdata;
3355
3356         if (list_empty(&i915->display.vbt.display_devices))
3357                 return true;
3358
3359         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3360                 const struct child_device_config *child = &devdata->child;
3361
3362                 /* If the device type is not LFP, continue.
3363                  * We have to check both the new identifiers as well as the
3364                  * old for compatibility with some BIOSes.
3365                  */
3366                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
3367                     child->device_type != DEVICE_TYPE_LFP)
3368                         continue;
3369
3370                 if (intel_gmbus_is_valid_pin(i915, child->i2c_pin))
3371                         *i2c_pin = child->i2c_pin;
3372
3373                 /* However, we cannot trust the BIOS writers to populate
3374                  * the VBT correctly.  Since LVDS requires additional
3375                  * information from AIM blocks, a non-zero addin offset is
3376                  * a good indicator that the LVDS is actually present.
3377                  */
3378                 if (child->addin_offset)
3379                         return true;
3380
3381                 /* But even then some BIOS writers perform some black magic
3382                  * and instantiate the device without reference to any
3383                  * additional data.  Trust that if the VBT was written into
3384                  * the OpRegion then they have validated the LVDS's existence.
3385                  */
3386                 if (i915->display.opregion.vbt)
3387                         return true;
3388         }
3389
3390         return false;
3391 }
3392
3393 /**
3394  * intel_bios_is_port_present - is the specified digital port present
3395  * @i915:       i915 device instance
3396  * @port:       port to check
3397  *
3398  * Return true if the device in %port is present.
3399  */
3400 bool intel_bios_is_port_present(struct drm_i915_private *i915, enum port port)
3401 {
3402         if (WARN_ON(!has_ddi_port_info(i915)))
3403                 return true;
3404
3405         return i915->display.vbt.ports[port];
3406 }
3407
3408 /**
3409  * intel_bios_is_port_edp - is the device in given port eDP
3410  * @i915:       i915 device instance
3411  * @port:       port to check
3412  *
3413  * Return true if the device in %port is eDP.
3414  */
3415 bool intel_bios_is_port_edp(struct drm_i915_private *i915, 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_edp(devdata);
3421 }
3422
3423 static bool intel_bios_encoder_supports_dp_dual_mode(const struct intel_bios_encoder_data *devdata)
3424 {
3425         const struct child_device_config *child = &devdata->child;
3426
3427         if (!intel_bios_encoder_supports_dp(devdata) ||
3428             !intel_bios_encoder_supports_hdmi(devdata))
3429                 return false;
3430
3431         if (dvo_port_type(child->dvo_port) == DVO_PORT_DPA)
3432                 return true;
3433
3434         /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
3435         if (dvo_port_type(child->dvo_port) == DVO_PORT_HDMIA &&
3436             child->aux_channel != 0)
3437                 return true;
3438
3439         return false;
3440 }
3441
3442 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *i915,
3443                                      enum port port)
3444 {
3445         const struct intel_bios_encoder_data *devdata =
3446                 intel_bios_encoder_data_lookup(i915, port);
3447
3448         return devdata && intel_bios_encoder_supports_dp_dual_mode(devdata);
3449 }
3450
3451 /**
3452  * intel_bios_is_dsi_present - is DSI present in VBT
3453  * @i915:       i915 device instance
3454  * @port:       port for DSI if present
3455  *
3456  * Return true if DSI is present, and return the port in %port.
3457  */
3458 bool intel_bios_is_dsi_present(struct drm_i915_private *i915,
3459                                enum port *port)
3460 {
3461         const struct intel_bios_encoder_data *devdata;
3462
3463         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3464                 const struct child_device_config *child = &devdata->child;
3465                 u8 dvo_port = child->dvo_port;
3466
3467                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
3468                         continue;
3469
3470                 if (dsi_dvo_port_to_port(i915, dvo_port) == PORT_NONE) {
3471                         drm_dbg_kms(&i915->drm,
3472                                     "VBT has unsupported DSI port %c\n",
3473                                     port_name(dvo_port - DVO_PORT_MIPIA));
3474                         continue;
3475                 }
3476
3477                 if (port)
3478                         *port = dsi_dvo_port_to_port(i915, dvo_port);
3479                 return true;
3480         }
3481
3482         return false;
3483 }
3484
3485 static void fill_dsc(struct intel_crtc_state *crtc_state,
3486                      struct dsc_compression_parameters_entry *dsc,
3487                      int dsc_max_bpc)
3488 {
3489         struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
3490         int bpc = 8;
3491
3492         vdsc_cfg->dsc_version_major = dsc->version_major;
3493         vdsc_cfg->dsc_version_minor = dsc->version_minor;
3494
3495         if (dsc->support_12bpc && dsc_max_bpc >= 12)
3496                 bpc = 12;
3497         else if (dsc->support_10bpc && dsc_max_bpc >= 10)
3498                 bpc = 10;
3499         else if (dsc->support_8bpc && dsc_max_bpc >= 8)
3500                 bpc = 8;
3501         else
3502                 DRM_DEBUG_KMS("VBT: Unsupported BPC %d for DCS\n",
3503                               dsc_max_bpc);
3504
3505         crtc_state->pipe_bpp = bpc * 3;
3506
3507         crtc_state->dsc.compressed_bpp = min(crtc_state->pipe_bpp,
3508                                              VBT_DSC_MAX_BPP(dsc->max_bpp));
3509
3510         /*
3511          * FIXME: This is ugly, and slice count should take DSC engine
3512          * throughput etc. into account.
3513          *
3514          * Also, per spec DSI supports 1, 2, 3 or 4 horizontal slices.
3515          */
3516         if (dsc->slices_per_line & BIT(2)) {
3517                 crtc_state->dsc.slice_count = 4;
3518         } else if (dsc->slices_per_line & BIT(1)) {
3519                 crtc_state->dsc.slice_count = 2;
3520         } else {
3521                 /* FIXME */
3522                 if (!(dsc->slices_per_line & BIT(0)))
3523                         DRM_DEBUG_KMS("VBT: Unsupported DSC slice count for DSI\n");
3524
3525                 crtc_state->dsc.slice_count = 1;
3526         }
3527
3528         if (crtc_state->hw.adjusted_mode.crtc_hdisplay %
3529             crtc_state->dsc.slice_count != 0)
3530                 DRM_DEBUG_KMS("VBT: DSC hdisplay %d not divisible by slice count %d\n",
3531                               crtc_state->hw.adjusted_mode.crtc_hdisplay,
3532                               crtc_state->dsc.slice_count);
3533
3534         /*
3535          * The VBT rc_buffer_block_size and rc_buffer_size definitions
3536          * correspond to DP 1.4 DPCD offsets 0x62 and 0x63.
3537          */
3538         vdsc_cfg->rc_model_size = drm_dsc_dp_rc_buffer_size(dsc->rc_buffer_block_size,
3539                                                             dsc->rc_buffer_size);
3540
3541         /* FIXME: DSI spec says bpc + 1 for this one */
3542         vdsc_cfg->line_buf_depth = VBT_DSC_LINE_BUFFER_DEPTH(dsc->line_buffer_depth);
3543
3544         vdsc_cfg->block_pred_enable = dsc->block_prediction_enable;
3545
3546         vdsc_cfg->slice_height = dsc->slice_height;
3547 }
3548
3549 /* FIXME: initially DSI specific */
3550 bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
3551                                struct intel_crtc_state *crtc_state,
3552                                int dsc_max_bpc)
3553 {
3554         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3555         const struct intel_bios_encoder_data *devdata;
3556
3557         list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
3558                 const struct child_device_config *child = &devdata->child;
3559
3560                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
3561                         continue;
3562
3563                 if (dsi_dvo_port_to_port(i915, child->dvo_port) == encoder->port) {
3564                         if (!devdata->dsc)
3565                                 return false;
3566
3567                         if (crtc_state)
3568                                 fill_dsc(crtc_state, devdata->dsc, dsc_max_bpc);
3569
3570                         return true;
3571                 }
3572         }
3573
3574         return false;
3575 }
3576
3577 /**
3578  * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
3579  * @i915:       i915 device instance
3580  * @port:       port to check
3581  *
3582  * Return true if HPD should be inverted for %port.
3583  */
3584 bool
3585 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
3586                                 enum port port)
3587 {
3588         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3589
3590         if (drm_WARN_ON_ONCE(&i915->drm,
3591                              !IS_GEMINILAKE(i915) && !IS_BROXTON(i915)))
3592                 return false;
3593
3594         return devdata && devdata->child.hpd_invert;
3595 }
3596
3597 /**
3598  * intel_bios_is_lane_reversal_needed - if lane reversal needed on port
3599  * @i915:       i915 device instance
3600  * @port:       port to check
3601  *
3602  * Return true if port requires lane reversal
3603  */
3604 bool
3605 intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
3606                                    enum port port)
3607 {
3608         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3609
3610         return devdata && devdata->child.lane_reversal;
3611 }
3612
3613 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *i915,
3614                                    enum port port)
3615 {
3616         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
3617         enum aux_ch aux_ch;
3618
3619         if (!devdata || !devdata->child.aux_channel) {
3620                 aux_ch = (enum aux_ch)port;
3621
3622                 drm_dbg_kms(&i915->drm,
3623                             "using AUX %c for port %c (platform default)\n",
3624                             aux_ch_name(aux_ch), port_name(port));
3625                 return aux_ch;
3626         }
3627
3628         /*
3629          * RKL/DG1 VBT uses PHY based mapping. Combo PHYs A,B,C,D
3630          * map to DDI A,B,TC1,TC2 respectively.
3631          *
3632          * ADL-S VBT uses PHY based mapping. Combo PHYs A,B,C,D,E
3633          * map to DDI A,TC1,TC2,TC3,TC4 respectively.
3634          */
3635         switch (devdata->child.aux_channel) {
3636         case DP_AUX_A:
3637                 aux_ch = AUX_CH_A;
3638                 break;
3639         case DP_AUX_B:
3640                 if (IS_ALDERLAKE_S(i915))
3641                         aux_ch = AUX_CH_USBC1;
3642                 else
3643                         aux_ch = AUX_CH_B;
3644                 break;
3645         case DP_AUX_C:
3646                 if (IS_ALDERLAKE_S(i915))
3647                         aux_ch = AUX_CH_USBC2;
3648                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
3649                         aux_ch = AUX_CH_USBC1;
3650                 else
3651                         aux_ch = AUX_CH_C;
3652                 break;
3653         case DP_AUX_D:
3654                 if (DISPLAY_VER(i915) >= 13)
3655                         aux_ch = AUX_CH_D_XELPD;
3656                 else if (IS_ALDERLAKE_S(i915))
3657                         aux_ch = AUX_CH_USBC3;
3658                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
3659                         aux_ch = AUX_CH_USBC2;
3660                 else
3661                         aux_ch = AUX_CH_D;
3662                 break;
3663         case DP_AUX_E:
3664                 if (DISPLAY_VER(i915) >= 13)
3665                         aux_ch = AUX_CH_E_XELPD;
3666                 else if (IS_ALDERLAKE_S(i915))
3667                         aux_ch = AUX_CH_USBC4;
3668                 else
3669                         aux_ch = AUX_CH_E;
3670                 break;
3671         case DP_AUX_F:
3672                 if (DISPLAY_VER(i915) >= 13)
3673                         aux_ch = AUX_CH_USBC1;
3674                 else
3675                         aux_ch = AUX_CH_F;
3676                 break;
3677         case DP_AUX_G:
3678                 if (DISPLAY_VER(i915) >= 13)
3679                         aux_ch = AUX_CH_USBC2;
3680                 else
3681                         aux_ch = AUX_CH_G;
3682                 break;
3683         case DP_AUX_H:
3684                 if (DISPLAY_VER(i915) >= 13)
3685                         aux_ch = AUX_CH_USBC3;
3686                 else
3687                         aux_ch = AUX_CH_H;
3688                 break;
3689         case DP_AUX_I:
3690                 if (DISPLAY_VER(i915) >= 13)
3691                         aux_ch = AUX_CH_USBC4;
3692                 else
3693                         aux_ch = AUX_CH_I;
3694                 break;
3695         default:
3696                 MISSING_CASE(devdata->child.aux_channel);
3697                 aux_ch = AUX_CH_A;
3698                 break;
3699         }
3700
3701         drm_dbg_kms(&i915->drm, "using AUX %c for port %c (VBT)\n",
3702                     aux_ch_name(aux_ch), port_name(port));
3703
3704         return aux_ch;
3705 }
3706
3707 int intel_bios_max_tmds_clock(struct intel_encoder *encoder)
3708 {
3709         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3710         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3711
3712         return _intel_bios_max_tmds_clock(devdata);
3713 }
3714
3715 /* This is an index in the HDMI/DVI DDI buffer translation table, or -1 */
3716 int intel_bios_hdmi_level_shift(struct intel_encoder *encoder)
3717 {
3718         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3719         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3720
3721         return _intel_bios_hdmi_level_shift(devdata);
3722 }
3723
3724 int intel_bios_encoder_dp_boost_level(const struct intel_bios_encoder_data *devdata)
3725 {
3726         if (!devdata || devdata->i915->display.vbt.version < 196 || !devdata->child.iboost)
3727                 return 0;
3728
3729         return translate_iboost(devdata->child.dp_iboost_level);
3730 }
3731
3732 int intel_bios_encoder_hdmi_boost_level(const struct intel_bios_encoder_data *devdata)
3733 {
3734         if (!devdata || devdata->i915->display.vbt.version < 196 || !devdata->child.iboost)
3735                 return 0;
3736
3737         return translate_iboost(devdata->child.hdmi_iboost_level);
3738 }
3739
3740 int intel_bios_dp_max_link_rate(struct intel_encoder *encoder)
3741 {
3742         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3743         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3744
3745         return _intel_bios_dp_max_link_rate(devdata);
3746 }
3747
3748 int intel_bios_dp_max_lane_count(struct intel_encoder *encoder)
3749 {
3750         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3751         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3752
3753         return _intel_bios_dp_max_lane_count(devdata);
3754 }
3755
3756 int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
3757 {
3758         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
3759         const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[encoder->port];
3760
3761         if (!devdata || !devdata->child.ddc_pin)
3762                 return 0;
3763
3764         return map_ddc_pin(i915, devdata->child.ddc_pin);
3765 }
3766
3767 bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)
3768 {
3769         return devdata->i915->display.vbt.version >= 195 && devdata->child.dp_usb_type_c;
3770 }
3771
3772 bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devdata)
3773 {
3774         return devdata->i915->display.vbt.version >= 209 && devdata->child.tbt;
3775 }
3776
3777 const struct intel_bios_encoder_data *
3778 intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
3779 {
3780         return i915->display.vbt.ports[port];
3781 }