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

   1 /*
   2  * Copyright © 2006 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include <drm/drm_dp_helper.h>
  29
  30 #include "display/intel_display.h"
  31 #include "display/intel_display_types.h"
  32 #include "display/intel_gmbus.h"
  33
  34 #include "i915_drv.h"
  35
  36 #define _INTEL_BIOS_PRIVATE
  37 #include "intel_vbt_defs.h"
  38
  39 /**
  40  * DOC: Video BIOS Table (VBT)
  41  *
  42  * The Video BIOS Table, or VBT, provides platform and board specific
  43  * configuration information to the driver that is not discoverable or available
  44  * through other means. The configuration is mostly related to display
  45  * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
  46  * the PCI ROM.
  47  *
  48  * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
  49  * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
  50  * contain the actual configuration information. The VBT Header, and thus the
  51  * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
  52  * BDB Header. The data blocks are concatenated after the BDB Header. The data
  53  * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
  54  * data. (Block 53, the MIPI Sequence Block is an exception.)
  55  *
  56  * The driver parses the VBT during load. The relevant information is stored in
  57  * driver private data for ease of use, and the actual VBT is not read after
  58  * that.
  59  */
  60
  61 /* Wrapper for VBT child device config */
  62 struct intel_bios_encoder_data {
  63         struct drm_i915_private *i915;
  64
  65         struct child_device_config child;
  66         struct dsc_compression_parameters_entry *dsc;
  67         struct list_head node;
  68 };
  69
  70 #define SLAVE_ADDR1     0x70
  71 #define SLAVE_ADDR2     0x72
  72
  73 /* Get BDB block size given a pointer to Block ID. */
  74 static u32 _get_blocksize(const u8 *block_base)
  75 {
  76         /* The MIPI Sequence Block v3+ has a separate size field. */
  77         if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
  78                 return *((const u32 *)(block_base + 4));
  79         else
  80                 return *((const u16 *)(block_base + 1));
  81 }
  82
  83 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
  84 static u32 get_blocksize(const void *block_data)
  85 {
  86         return _get_blocksize(block_data - 3);
  87 }
  88
  89 static const void *
  90 find_section(const void *_bdb, enum bdb_block_id section_id)
  91 {
  92         const struct bdb_header *bdb = _bdb;
  93         const u8 *base = _bdb;
  94         int index = 0;
  95         u32 total, current_size;
  96         enum bdb_block_id current_id;
  97
  98         /* skip to first section */
  99         index += bdb->header_size;
 100         total = bdb->bdb_size;
 101
 102         /* walk the sections looking for section_id */
 103         while (index + 3 < total) {
 104                 current_id = *(base + index);
 105                 current_size = _get_blocksize(base + index);
 106                 index += 3;
 107
 108                 if (index + current_size > total)
 109                         return NULL;
 110
 111                 if (current_id == section_id)
 112                         return base + index;
 113
 114                 index += current_size;
 115         }
 116
 117         return NULL;
 118 }
 119
 120 static void
 121 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
 122                         const struct lvds_dvo_timing *dvo_timing)
 123 {
 124         panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
 125                 dvo_timing->hactive_lo;
 126         panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
 127                 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
 128         panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
 129                 ((dvo_timing->hsync_pulse_width_hi << 8) |
 130                         dvo_timing->hsync_pulse_width_lo);
 131         panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
 132                 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
 133
 134         panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
 135                 dvo_timing->vactive_lo;
 136         panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
 137                 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
 138         panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
 139                 ((dvo_timing->vsync_pulse_width_hi << 4) |
 140                         dvo_timing->vsync_pulse_width_lo);
 141         panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
 142                 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
 143         panel_fixed_mode->clock = dvo_timing->clock * 10;
 144         panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
 145
 146         if (dvo_timing->hsync_positive)
 147                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
 148         else
 149                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
 150
 151         if (dvo_timing->vsync_positive)
 152                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
 153         else
 154                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
 155
 156         panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
 157                 dvo_timing->himage_lo;
 158         panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
 159                 dvo_timing->vimage_lo;
 160
 161         /* Some VBTs have bogus h/vtotal values */
 162         if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
 163                 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
 164         if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
 165                 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
 166
 167         drm_mode_set_name(panel_fixed_mode);
 168 }
 169
 170 static const struct lvds_dvo_timing *
 171 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
 172                     const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
 173                     int index)
 174 {
 175         /*
 176          * the size of fp_timing varies on the different platform.
 177          * So calculate the DVO timing relative offset in LVDS data
 178          * entry to get the DVO timing entry
 179          */
 180
 181         int lfp_data_size =
 182                 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
 183                 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
 184         int dvo_timing_offset =
 185                 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
 186                 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
 187         char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
 188
 189         return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
 190 }
 191
 192 /* get lvds_fp_timing entry
 193  * this function may return NULL if the corresponding entry is invalid
 194  */
 195 static const struct lvds_fp_timing *
 196 get_lvds_fp_timing(const struct bdb_header *bdb,
 197                    const struct bdb_lvds_lfp_data *data,
 198                    const struct bdb_lvds_lfp_data_ptrs *ptrs,
 199                    int index)
 200 {
 201         size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
 202         u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
 203         size_t ofs;
 204
 205         if (index >= ARRAY_SIZE(ptrs->ptr))
 206                 return NULL;
 207         ofs = ptrs->ptr[index].fp_timing_offset;
 208         if (ofs < data_ofs ||
 209             ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
 210                 return NULL;
 211         return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
 212 }
 213
 214 /* Parse general panel options */
 215 static void
 216 parse_panel_options(struct drm_i915_private *i915,
 217                     const struct bdb_header *bdb)
 218 {
 219         const struct bdb_lvds_options *lvds_options;
 220         int panel_type;
 221         int drrs_mode;
 222         int ret;
 223
 224         lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
 225         if (!lvds_options)
 226                 return;
 227
 228         i915->vbt.lvds_dither = lvds_options->pixel_dither;
 229
 230         ret = intel_opregion_get_panel_type(i915);
 231         if (ret >= 0) {
 232                 drm_WARN_ON(&i915->drm, ret > 0xf);
 233                 panel_type = ret;
 234                 drm_dbg_kms(&i915->drm, "Panel type: %d (OpRegion)\n",
 235                             panel_type);
 236         } else {
 237                 if (lvds_options->panel_type > 0xf) {
 238                         drm_dbg_kms(&i915->drm,
 239                                     "Invalid VBT panel type 0x%x\n",
 240                                     lvds_options->panel_type);
 241                         return;
 242                 }
 243                 panel_type = lvds_options->panel_type;
 244                 drm_dbg_kms(&i915->drm, "Panel type: %d (VBT)\n",
 245                             panel_type);
 246         }
 247
 248         i915->vbt.panel_type = panel_type;
 249
 250         drrs_mode = (lvds_options->dps_panel_type_bits
 251                                 >> (panel_type * 2)) & MODE_MASK;
 252         /*
 253          * VBT has static DRRS = 0 and seamless DRRS = 2.
 254          * The below piece of code is required to adjust vbt.drrs_type
 255          * to match the enum drrs_support_type.
 256          */
 257         switch (drrs_mode) {
 258         case 0:
 259                 i915->vbt.drrs_type = STATIC_DRRS_SUPPORT;
 260                 drm_dbg_kms(&i915->drm, "DRRS supported mode is static\n");
 261                 break;
 262         case 2:
 263                 i915->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
 264                 drm_dbg_kms(&i915->drm,
 265                             "DRRS supported mode is seamless\n");
 266                 break;
 267         default:
 268                 i915->vbt.drrs_type = DRRS_NOT_SUPPORTED;
 269                 drm_dbg_kms(&i915->drm,
 270                             "DRRS not supported (VBT input)\n");
 271                 break;
 272         }
 273 }
 274
 275 /* Try to find integrated panel timing data */
 276 static void
 277 parse_lfp_panel_dtd(struct drm_i915_private *i915,
 278                     const struct bdb_header *bdb)
 279 {
 280         const struct bdb_lvds_lfp_data *lvds_lfp_data;
 281         const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
 282         const struct lvds_dvo_timing *panel_dvo_timing;
 283         const struct lvds_fp_timing *fp_timing;
 284         struct drm_display_mode *panel_fixed_mode;
 285         int panel_type = i915->vbt.panel_type;
 286
 287         lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
 288         if (!lvds_lfp_data)
 289                 return;
 290
 291         lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
 292         if (!lvds_lfp_data_ptrs)
 293                 return;
 294
 295         panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
 296                                                lvds_lfp_data_ptrs,
 297                                                panel_type);
 298
 299         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 300         if (!panel_fixed_mode)
 301                 return;
 302
 303         fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
 304
 305         i915->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
 306
 307         drm_dbg_kms(&i915->drm,
 308                     "Found panel mode in BIOS VBT legacy lfp table:\n");
 309         drm_mode_debug_printmodeline(panel_fixed_mode);
 310
 311         fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
 312                                        lvds_lfp_data_ptrs,
 313                                        panel_type);
 314         if (fp_timing) {
 315                 /* check the resolution, just to be sure */
 316                 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
 317                     fp_timing->y_res == panel_fixed_mode->vdisplay) {
 318                         i915->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
 319                         drm_dbg_kms(&i915->drm,
 320                                     "VBT initial LVDS value %x\n",
 321                                     i915->vbt.bios_lvds_val);
 322                 }
 323         }
 324 }
 325
 326 static void
 327 parse_generic_dtd(struct drm_i915_private *i915,
 328                   const struct bdb_header *bdb)
 329 {
 330         const struct bdb_generic_dtd *generic_dtd;
 331         const struct generic_dtd_entry *dtd;
 332         struct drm_display_mode *panel_fixed_mode;
 333         int num_dtd;
 334
 335         generic_dtd = find_section(bdb, BDB_GENERIC_DTD);
 336         if (!generic_dtd)
 337                 return;
 338
 339         if (generic_dtd->gdtd_size < sizeof(struct generic_dtd_entry)) {
 340                 drm_err(&i915->drm, "GDTD size %u is too small.\n",
 341                         generic_dtd->gdtd_size);
 342                 return;
 343         } else if (generic_dtd->gdtd_size !=
 344                    sizeof(struct generic_dtd_entry)) {
 345                 drm_err(&i915->drm, "Unexpected GDTD size %u\n",
 346                         generic_dtd->gdtd_size);
 347                 /* DTD has unknown fields, but keep going */
 348         }
 349
 350         num_dtd = (get_blocksize(generic_dtd) -
 351                    sizeof(struct bdb_generic_dtd)) / generic_dtd->gdtd_size;
 352         if (i915->vbt.panel_type >= num_dtd) {
 353                 drm_err(&i915->drm,
 354                         "Panel type %d not found in table of %d DTD's\n",
 355                         i915->vbt.panel_type, num_dtd);
 356                 return;
 357         }
 358
 359         dtd = &generic_dtd->dtd[i915->vbt.panel_type];
 360
 361         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 362         if (!panel_fixed_mode)
 363                 return;
 364
 365         panel_fixed_mode->hdisplay = dtd->hactive;
 366         panel_fixed_mode->hsync_start =
 367                 panel_fixed_mode->hdisplay + dtd->hfront_porch;
 368         panel_fixed_mode->hsync_end =
 369                 panel_fixed_mode->hsync_start + dtd->hsync;
 370         panel_fixed_mode->htotal =
 371                 panel_fixed_mode->hdisplay + dtd->hblank;
 372
 373         panel_fixed_mode->vdisplay = dtd->vactive;
 374         panel_fixed_mode->vsync_start =
 375                 panel_fixed_mode->vdisplay + dtd->vfront_porch;
 376         panel_fixed_mode->vsync_end =
 377                 panel_fixed_mode->vsync_start + dtd->vsync;
 378         panel_fixed_mode->vtotal =
 379                 panel_fixed_mode->vdisplay + dtd->vblank;
 380
 381         panel_fixed_mode->clock = dtd->pixel_clock;
 382         panel_fixed_mode->width_mm = dtd->width_mm;
 383         panel_fixed_mode->height_mm = dtd->height_mm;
 384
 385         panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
 386         drm_mode_set_name(panel_fixed_mode);
 387
 388         if (dtd->hsync_positive_polarity)
 389                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
 390         else
 391                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
 392
 393         if (dtd->vsync_positive_polarity)
 394                 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
 395         else
 396                 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
 397
 398         drm_dbg_kms(&i915->drm,
 399                     "Found panel mode in BIOS VBT generic dtd table:\n");
 400         drm_mode_debug_printmodeline(panel_fixed_mode);
 401
 402         i915->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
 403 }
 404
 405 static void
 406 parse_panel_dtd(struct drm_i915_private *i915,
 407                 const struct bdb_header *bdb)
 408 {
 409         /*
 410          * Older VBTs provided provided DTD information for internal displays
 411          * through the "LFP panel DTD" block (42).  As of VBT revision 229,
 412          * that block is now deprecated and DTD information should be provided
 413          * via a newer "generic DTD" block (58).  Just to be safe, we'll
 414          * try the new generic DTD block first on VBT >= 229, but still fall
 415          * back to trying the old LFP block if that fails.
 416          */
 417         if (bdb->version >= 229)
 418                 parse_generic_dtd(i915, bdb);
 419         if (!i915->vbt.lfp_lvds_vbt_mode)
 420                 parse_lfp_panel_dtd(i915, bdb);
 421 }
 422
 423 static void
 424 parse_lfp_backlight(struct drm_i915_private *i915,
 425                     const struct bdb_header *bdb)
 426 {
 427         const struct bdb_lfp_backlight_data *backlight_data;
 428         const struct lfp_backlight_data_entry *entry;
 429         int panel_type = i915->vbt.panel_type;
 430         u16 level;
 431
 432         backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
 433         if (!backlight_data)
 434                 return;
 435
 436         if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
 437                 drm_dbg_kms(&i915->drm,
 438                             "Unsupported backlight data entry size %u\n",
 439                             backlight_data->entry_size);
 440                 return;
 441         }
 442
 443         entry = &backlight_data->data[panel_type];
 444
 445         i915->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
 446         if (!i915->vbt.backlight.present) {
 447                 drm_dbg_kms(&i915->drm,
 448                             "PWM backlight not present in VBT (type %u)\n",
 449                             entry->type);
 450                 return;
 451         }
 452
 453         i915->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
 454         if (bdb->version >= 191 &&
 455             get_blocksize(backlight_data) >= sizeof(*backlight_data)) {
 456                 const struct lfp_backlight_control_method *method;
 457
 458                 method = &backlight_data->backlight_control[panel_type];
 459                 i915->vbt.backlight.type = method->type;
 460                 i915->vbt.backlight.controller = method->controller;
 461         }
 462
 463         i915->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
 464         i915->vbt.backlight.active_low_pwm = entry->active_low_pwm;
 465
 466         if (bdb->version >= 234) {
 467                 u16 min_level;
 468                 bool scale;
 469
 470                 level = backlight_data->brightness_level[panel_type].level;
 471                 min_level = backlight_data->brightness_min_level[panel_type].level;
 472
 473                 if (bdb->version >= 236)
 474                         scale = backlight_data->brightness_precision_bits[panel_type] == 16;
 475                 else
 476                         scale = level > 255;
 477
 478                 if (scale)
 479                         min_level = min_level / 255;
 480
 481                 if (min_level > 255) {
 482                         drm_warn(&i915->drm, "Brightness min level > 255\n");
 483                         level = 255;
 484                 }
 485                 i915->vbt.backlight.min_brightness = min_level;
 486         } else {
 487                 level = backlight_data->level[panel_type];
 488                 i915->vbt.backlight.min_brightness = entry->min_brightness;
 489         }
 490
 491         drm_dbg_kms(&i915->drm,
 492                     "VBT backlight PWM modulation frequency %u Hz, "
 493                     "active %s, min brightness %u, level %u, controller %u\n",
 494                     i915->vbt.backlight.pwm_freq_hz,
 495                     i915->vbt.backlight.active_low_pwm ? "low" : "high",
 496                     i915->vbt.backlight.min_brightness,
 497                     level,
 498                     i915->vbt.backlight.controller);
 499 }
 500
 501 /* Try to find sdvo panel data */
 502 static void
 503 parse_sdvo_panel_data(struct drm_i915_private *i915,
 504                       const struct bdb_header *bdb)
 505 {
 506         const struct bdb_sdvo_panel_dtds *dtds;
 507         struct drm_display_mode *panel_fixed_mode;
 508         int index;
 509
 510         index = i915->params.vbt_sdvo_panel_type;
 511         if (index == -2) {
 512                 drm_dbg_kms(&i915->drm,
 513                             "Ignore SDVO panel mode from BIOS VBT tables.\n");
 514                 return;
 515         }
 516
 517         if (index == -1) {
 518                 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
 519
 520                 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
 521                 if (!sdvo_lvds_options)
 522                         return;
 523
 524                 index = sdvo_lvds_options->panel_type;
 525         }
 526
 527         dtds = find_section(bdb, BDB_SDVO_PANEL_DTDS);
 528         if (!dtds)
 529                 return;
 530
 531         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 532         if (!panel_fixed_mode)
 533                 return;
 534
 535         fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]);
 536
 537         i915->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
 538
 539         drm_dbg_kms(&i915->drm,
 540                     "Found SDVO panel mode in BIOS VBT tables:\n");
 541         drm_mode_debug_printmodeline(panel_fixed_mode);
 542 }
 543
 544 static int intel_bios_ssc_frequency(struct drm_i915_private *i915,
 545                                     bool alternate)
 546 {
 547         switch (DISPLAY_VER(i915)) {
 548         case 2:
 549                 return alternate ? 66667 : 48000;
 550         case 3:
 551         case 4:
 552                 return alternate ? 100000 : 96000;
 553         default:
 554                 return alternate ? 100000 : 120000;
 555         }
 556 }
 557
 558 static void
 559 parse_general_features(struct drm_i915_private *i915,
 560                        const struct bdb_header *bdb)
 561 {
 562         const struct bdb_general_features *general;
 563
 564         general = find_section(bdb, BDB_GENERAL_FEATURES);
 565         if (!general)
 566                 return;
 567
 568         i915->vbt.int_tv_support = general->int_tv_support;
 569         /* int_crt_support can't be trusted on earlier platforms */
 570         if (bdb->version >= 155 &&
 571             (HAS_DDI(i915) || IS_VALLEYVIEW(i915)))
 572                 i915->vbt.int_crt_support = general->int_crt_support;
 573         i915->vbt.lvds_use_ssc = general->enable_ssc;
 574         i915->vbt.lvds_ssc_freq =
 575                 intel_bios_ssc_frequency(i915, general->ssc_freq);
 576         i915->vbt.display_clock_mode = general->display_clock_mode;
 577         i915->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
 578         if (bdb->version >= 181) {
 579                 i915->vbt.orientation = general->rotate_180 ?
 580                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
 581                         DRM_MODE_PANEL_ORIENTATION_NORMAL;
 582         } else {
 583                 i915->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
 584         }
 585         drm_dbg_kms(&i915->drm,
 586                     "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",
 587                     i915->vbt.int_tv_support,
 588                     i915->vbt.int_crt_support,
 589                     i915->vbt.lvds_use_ssc,
 590                     i915->vbt.lvds_ssc_freq,
 591                     i915->vbt.display_clock_mode,
 592                     i915->vbt.fdi_rx_polarity_inverted);
 593 }
 594
 595 static const struct child_device_config *
 596 child_device_ptr(const struct bdb_general_definitions *defs, int i)
 597 {
 598         return (const void *) &defs->devices[i * defs->child_dev_size];
 599 }
 600
 601 static void
 602 parse_sdvo_device_mapping(struct drm_i915_private *i915)
 603 {
 604         struct sdvo_device_mapping *mapping;
 605         const struct intel_bios_encoder_data *devdata;
 606         const struct child_device_config *child;
 607         int count = 0;
 608
 609         /*
 610          * Only parse SDVO mappings on gens that could have SDVO. This isn't
 611          * accurate and doesn't have to be, as long as it's not too strict.
 612          */
 613         if (!IS_DISPLAY_VER(i915, 3, 7)) {
 614                 drm_dbg_kms(&i915->drm, "Skipping SDVO device mapping\n");
 615                 return;
 616         }
 617
 618         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
 619                 child = &devdata->child;
 620
 621                 if (child->slave_addr != SLAVE_ADDR1 &&
 622                     child->slave_addr != SLAVE_ADDR2) {
 623                         /*
 624                          * If the slave address is neither 0x70 nor 0x72,
 625                          * it is not a SDVO device. Skip it.
 626                          */
 627                         continue;
 628                 }
 629                 if (child->dvo_port != DEVICE_PORT_DVOB &&
 630                     child->dvo_port != DEVICE_PORT_DVOC) {
 631                         /* skip the incorrect SDVO port */
 632                         drm_dbg_kms(&i915->drm,
 633                                     "Incorrect SDVO port. Skip it\n");
 634                         continue;
 635                 }
 636                 drm_dbg_kms(&i915->drm,
 637                             "the SDVO device with slave addr %2x is found on"
 638                             " %s port\n",
 639                             child->slave_addr,
 640                             (child->dvo_port == DEVICE_PORT_DVOB) ?
 641                             "SDVOB" : "SDVOC");
 642                 mapping = &i915->vbt.sdvo_mappings[child->dvo_port - 1];
 643                 if (!mapping->initialized) {
 644                         mapping->dvo_port = child->dvo_port;
 645                         mapping->slave_addr = child->slave_addr;
 646                         mapping->dvo_wiring = child->dvo_wiring;
 647                         mapping->ddc_pin = child->ddc_pin;
 648                         mapping->i2c_pin = child->i2c_pin;
 649                         mapping->initialized = 1;
 650                         drm_dbg_kms(&i915->drm,
 651                                     "SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
 652                                     mapping->dvo_port, mapping->slave_addr,
 653                                     mapping->dvo_wiring, mapping->ddc_pin,
 654                                     mapping->i2c_pin);
 655                 } else {
 656                         drm_dbg_kms(&i915->drm,
 657                                     "Maybe one SDVO port is shared by "
 658                                     "two SDVO device.\n");
 659                 }
 660                 if (child->slave2_addr) {
 661                         /* Maybe this is a SDVO device with multiple inputs */
 662                         /* And the mapping info is not added */
 663                         drm_dbg_kms(&i915->drm,
 664                                     "there exists the slave2_addr. Maybe this"
 665                                     " is a SDVO device with multiple inputs.\n");
 666                 }
 667                 count++;
 668         }
 669
 670         if (!count) {
 671                 /* No SDVO device info is found */
 672                 drm_dbg_kms(&i915->drm,
 673                             "No SDVO device info is found in VBT\n");
 674         }
 675 }
 676
 677 static void
 678 parse_driver_features(struct drm_i915_private *i915,
 679                       const struct bdb_header *bdb)
 680 {
 681         const struct bdb_driver_features *driver;
 682
 683         driver = find_section(bdb, BDB_DRIVER_FEATURES);
 684         if (!driver)
 685                 return;
 686
 687         if (DISPLAY_VER(i915) >= 5) {
 688                 /*
 689                  * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
 690                  * to mean "eDP". The VBT spec doesn't agree with that
 691                  * interpretation, but real world VBTs seem to.
 692                  */
 693                 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
 694                         i915->vbt.int_lvds_support = 0;
 695         } else {
 696                 /*
 697                  * FIXME it's not clear which BDB version has the LVDS config
 698                  * bits defined. Revision history in the VBT spec says:
 699                  * "0.92 | Add two definitions for VBT value of LVDS Active
 700                  *  Config (00b and 11b values defined) | 06/13/2005"
 701                  * but does not the specify the BDB version.
 702                  *
 703                  * So far version 134 (on i945gm) is the oldest VBT observed
 704                  * in the wild with the bits correctly populated. Version
 705                  * 108 (on i85x) does not have the bits correctly populated.
 706                  */
 707                 if (bdb->version >= 134 &&
 708                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
 709                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
 710                         i915->vbt.int_lvds_support = 0;
 711         }
 712
 713         if (bdb->version < 228) {
 714                 drm_dbg_kms(&i915->drm, "DRRS State Enabled:%d\n",
 715                             driver->drrs_enabled);
 716                 /*
 717                  * If DRRS is not supported, drrs_type has to be set to 0.
 718                  * This is because, VBT is configured in such a way that
 719                  * static DRRS is 0 and DRRS not supported is represented by
 720                  * driver->drrs_enabled=false
 721                  */
 722                 if (!driver->drrs_enabled)
 723                         i915->vbt.drrs_type = DRRS_NOT_SUPPORTED;
 724
 725                 i915->vbt.psr.enable = driver->psr_enabled;
 726         }
 727 }
 728
 729 static void
 730 parse_power_conservation_features(struct drm_i915_private *i915,
 731                                   const struct bdb_header *bdb)
 732 {
 733         const struct bdb_lfp_power *power;
 734         u8 panel_type = i915->vbt.panel_type;
 735
 736         if (bdb->version < 228)
 737                 return;
 738
 739         power = find_section(bdb, BDB_LFP_POWER);
 740         if (!power)
 741                 return;
 742
 743         i915->vbt.psr.enable = power->psr & BIT(panel_type);
 744
 745         /*
 746          * If DRRS is not supported, drrs_type has to be set to 0.
 747          * This is because, VBT is configured in such a way that
 748          * static DRRS is 0 and DRRS not supported is represented by
 749          * power->drrs & BIT(panel_type)=false
 750          */
 751         if (!(power->drrs & BIT(panel_type)))
 752                 i915->vbt.drrs_type = DRRS_NOT_SUPPORTED;
 753
 754         if (bdb->version >= 232)
 755                 i915->vbt.edp.hobl = power->hobl & BIT(panel_type);
 756 }
 757
 758 static void
 759 parse_edp(struct drm_i915_private *i915, const struct bdb_header *bdb)
 760 {
 761         const struct bdb_edp *edp;
 762         const struct edp_power_seq *edp_pps;
 763         const struct edp_fast_link_params *edp_link_params;
 764         int panel_type = i915->vbt.panel_type;
 765
 766         edp = find_section(bdb, BDB_EDP);
 767         if (!edp)
 768                 return;
 769
 770         switch ((edp->color_depth >> (panel_type * 2)) & 3) {
 771         case EDP_18BPP:
 772                 i915->vbt.edp.bpp = 18;
 773                 break;
 774         case EDP_24BPP:
 775                 i915->vbt.edp.bpp = 24;
 776                 break;
 777         case EDP_30BPP:
 778                 i915->vbt.edp.bpp = 30;
 779                 break;
 780         }
 781
 782         /* Get the eDP sequencing and link info */
 783         edp_pps = &edp->power_seqs[panel_type];
 784         edp_link_params = &edp->fast_link_params[panel_type];
 785
 786         i915->vbt.edp.pps = *edp_pps;
 787
 788         switch (edp_link_params->rate) {
 789         case EDP_RATE_1_62:
 790                 i915->vbt.edp.rate = DP_LINK_BW_1_62;
 791                 break;
 792         case EDP_RATE_2_7:
 793                 i915->vbt.edp.rate = DP_LINK_BW_2_7;
 794                 break;
 795         default:
 796                 drm_dbg_kms(&i915->drm,
 797                             "VBT has unknown eDP link rate value %u\n",
 798                              edp_link_params->rate);
 799                 break;
 800         }
 801
 802         switch (edp_link_params->lanes) {
 803         case EDP_LANE_1:
 804                 i915->vbt.edp.lanes = 1;
 805                 break;
 806         case EDP_LANE_2:
 807                 i915->vbt.edp.lanes = 2;
 808                 break;
 809         case EDP_LANE_4:
 810                 i915->vbt.edp.lanes = 4;
 811                 break;
 812         default:
 813                 drm_dbg_kms(&i915->drm,
 814                             "VBT has unknown eDP lane count value %u\n",
 815                             edp_link_params->lanes);
 816                 break;
 817         }
 818
 819         switch (edp_link_params->preemphasis) {
 820         case EDP_PREEMPHASIS_NONE:
 821                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
 822                 break;
 823         case EDP_PREEMPHASIS_3_5dB:
 824                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
 825                 break;
 826         case EDP_PREEMPHASIS_6dB:
 827                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
 828                 break;
 829         case EDP_PREEMPHASIS_9_5dB:
 830                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
 831                 break;
 832         default:
 833                 drm_dbg_kms(&i915->drm,
 834                             "VBT has unknown eDP pre-emphasis value %u\n",
 835                             edp_link_params->preemphasis);
 836                 break;
 837         }
 838
 839         switch (edp_link_params->vswing) {
 840         case EDP_VSWING_0_4V:
 841                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
 842                 break;
 843         case EDP_VSWING_0_6V:
 844                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
 845                 break;
 846         case EDP_VSWING_0_8V:
 847                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
 848                 break;
 849         case EDP_VSWING_1_2V:
 850                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
 851                 break;
 852         default:
 853                 drm_dbg_kms(&i915->drm,
 854                             "VBT has unknown eDP voltage swing value %u\n",
 855                             edp_link_params->vswing);
 856                 break;
 857         }
 858
 859         if (bdb->version >= 173) {
 860                 u8 vswing;
 861
 862                 /* Don't read from VBT if module parameter has valid value*/
 863                 if (i915->params.edp_vswing) {
 864                         i915->vbt.edp.low_vswing =
 865                                 i915->params.edp_vswing == 1;
 866                 } else {
 867                         vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
 868                         i915->vbt.edp.low_vswing = vswing == 0;
 869                 }
 870         }
 871 }
 872
 873 static void
 874 parse_psr(struct drm_i915_private *i915, const struct bdb_header *bdb)
 875 {
 876         const struct bdb_psr *psr;
 877         const struct psr_table *psr_table;
 878         int panel_type = i915->vbt.panel_type;
 879
 880         psr = find_section(bdb, BDB_PSR);
 881         if (!psr) {
 882                 drm_dbg_kms(&i915->drm, "No PSR BDB found.\n");
 883                 return;
 884         }
 885
 886         psr_table = &psr->psr_table[panel_type];
 887
 888         i915->vbt.psr.full_link = psr_table->full_link;
 889         i915->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
 890
 891         /* Allowed VBT values goes from 0 to 15 */
 892         i915->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
 893                 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
 894
 895         switch (psr_table->lines_to_wait) {
 896         case 0:
 897                 i915->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
 898                 break;
 899         case 1:
 900                 i915->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
 901                 break;
 902         case 2:
 903                 i915->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
 904                 break;
 905         case 3:
 906                 i915->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
 907                 break;
 908         default:
 909                 drm_dbg_kms(&i915->drm,
 910                             "VBT has unknown PSR lines to wait %u\n",
 911                             psr_table->lines_to_wait);
 912                 break;
 913         }
 914
 915         /*
 916          * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
 917          * Old decimal value is wake up time in multiples of 100 us.
 918          */
 919         if (bdb->version >= 205 &&
 920             (DISPLAY_VER(i915) >= 9 && !IS_BROXTON(i915))) {
 921                 switch (psr_table->tp1_wakeup_time) {
 922                 case 0:
 923                         i915->vbt.psr.tp1_wakeup_time_us = 500;
 924                         break;
 925                 case 1:
 926                         i915->vbt.psr.tp1_wakeup_time_us = 100;
 927                         break;
 928                 case 3:
 929                         i915->vbt.psr.tp1_wakeup_time_us = 0;
 930                         break;
 931                 default:
 932                         drm_dbg_kms(&i915->drm,
 933                                     "VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 934                                     psr_table->tp1_wakeup_time);
 935                         fallthrough;
 936                 case 2:
 937                         i915->vbt.psr.tp1_wakeup_time_us = 2500;
 938                         break;
 939                 }
 940
 941                 switch (psr_table->tp2_tp3_wakeup_time) {
 942                 case 0:
 943                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 500;
 944                         break;
 945                 case 1:
 946                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 100;
 947                         break;
 948                 case 3:
 949                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 0;
 950                         break;
 951                 default:
 952                         drm_dbg_kms(&i915->drm,
 953                                     "VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 954                                     psr_table->tp2_tp3_wakeup_time);
 955                         fallthrough;
 956                 case 2:
 957                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
 958                 break;
 959                 }
 960         } else {
 961                 i915->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
 962                 i915->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
 963         }
 964
 965         if (bdb->version >= 226) {
 966                 u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time;
 967
 968                 wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3;
 969                 switch (wakeup_time) {
 970                 case 0:
 971                         wakeup_time = 500;
 972                         break;
 973                 case 1:
 974                         wakeup_time = 100;
 975                         break;
 976                 case 3:
 977                         wakeup_time = 50;
 978                         break;
 979                 default:
 980                 case 2:
 981                         wakeup_time = 2500;
 982                         break;
 983                 }
 984                 i915->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time;
 985         } else {
 986                 /* Reusing PSR1 wakeup time for PSR2 in older VBTs */
 987                 i915->vbt.psr.psr2_tp2_tp3_wakeup_time_us = i915->vbt.psr.tp2_tp3_wakeup_time_us;
 988         }
 989 }
 990
 991 static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
 992                                       u16 version, enum port port)
 993 {
 994         if (!i915->vbt.dsi.config->dual_link || version < 197) {
 995                 i915->vbt.dsi.bl_ports = BIT(port);
 996                 if (i915->vbt.dsi.config->cabc_supported)
 997                         i915->vbt.dsi.cabc_ports = BIT(port);
 998
 999                 return;
1000         }
1001
1002         switch (i915->vbt.dsi.config->dl_dcs_backlight_ports) {
1003         case DL_DCS_PORT_A:
1004                 i915->vbt.dsi.bl_ports = BIT(PORT_A);
1005                 break;
1006         case DL_DCS_PORT_C:
1007                 i915->vbt.dsi.bl_ports = BIT(PORT_C);
1008                 break;
1009         default:
1010         case DL_DCS_PORT_A_AND_C:
1011                 i915->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
1012                 break;
1013         }
1014
1015         if (!i915->vbt.dsi.config->cabc_supported)
1016                 return;
1017
1018         switch (i915->vbt.dsi.config->dl_dcs_cabc_ports) {
1019         case DL_DCS_PORT_A:
1020                 i915->vbt.dsi.cabc_ports = BIT(PORT_A);
1021                 break;
1022         case DL_DCS_PORT_C:
1023                 i915->vbt.dsi.cabc_ports = BIT(PORT_C);
1024                 break;
1025         default:
1026         case DL_DCS_PORT_A_AND_C:
1027                 i915->vbt.dsi.cabc_ports =
1028                                         BIT(PORT_A) | BIT(PORT_C);
1029                 break;
1030         }
1031 }
1032
1033 static void
1034 parse_mipi_config(struct drm_i915_private *i915,
1035                   const struct bdb_header *bdb)
1036 {
1037         const struct bdb_mipi_config *start;
1038         const struct mipi_config *config;
1039         const struct mipi_pps_data *pps;
1040         int panel_type = i915->vbt.panel_type;
1041         enum port port;
1042
1043         /* parse MIPI blocks only if LFP type is MIPI */
1044         if (!intel_bios_is_dsi_present(i915, &port))
1045                 return;
1046
1047         /* Initialize this to undefined indicating no generic MIPI support */
1048         i915->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
1049
1050         /* Block #40 is already parsed and panel_fixed_mode is
1051          * stored in i915->lfp_lvds_vbt_mode
1052          * resuse this when needed
1053          */
1054
1055         /* Parse #52 for panel index used from panel_type already
1056          * parsed
1057          */
1058         start = find_section(bdb, BDB_MIPI_CONFIG);
1059         if (!start) {
1060                 drm_dbg_kms(&i915->drm, "No MIPI config BDB found");
1061                 return;
1062         }
1063
1064         drm_dbg(&i915->drm, "Found MIPI Config block, panel index = %d\n",
1065                 panel_type);
1066
1067         /*
1068          * get hold of the correct configuration block and pps data as per
1069          * the panel_type as index
1070          */
1071         config = &start->config[panel_type];
1072         pps = &start->pps[panel_type];
1073
1074         /* store as of now full data. Trim when we realise all is not needed */
1075         i915->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
1076         if (!i915->vbt.dsi.config)
1077                 return;
1078
1079         i915->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
1080         if (!i915->vbt.dsi.pps) {
1081                 kfree(i915->vbt.dsi.config);
1082                 return;
1083         }
1084
1085         parse_dsi_backlight_ports(i915, bdb->version, port);
1086
1087         /* FIXME is the 90 vs. 270 correct? */
1088         switch (config->rotation) {
1089         case ENABLE_ROTATION_0:
1090                 /*
1091                  * Most (all?) VBTs claim 0 degrees despite having
1092                  * an upside down panel, thus we do not trust this.
1093                  */
1094                 i915->vbt.dsi.orientation =
1095                         DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
1096                 break;
1097         case ENABLE_ROTATION_90:
1098                 i915->vbt.dsi.orientation =
1099                         DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
1100                 break;
1101         case ENABLE_ROTATION_180:
1102                 i915->vbt.dsi.orientation =
1103                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
1104                 break;
1105         case ENABLE_ROTATION_270:
1106                 i915->vbt.dsi.orientation =
1107                         DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
1108                 break;
1109         }
1110
1111         /* We have mandatory mipi config blocks. Initialize as generic panel */
1112         i915->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
1113 }
1114
1115 /* Find the sequence block and size for the given panel. */
1116 static const u8 *
1117 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
1118                           u16 panel_id, u32 *seq_size)
1119 {
1120         u32 total = get_blocksize(sequence);
1121         const u8 *data = &sequence->data[0];
1122         u8 current_id;
1123         u32 current_size;
1124         int header_size = sequence->version >= 3 ? 5 : 3;
1125         int index = 0;
1126         int i;
1127
1128         /* skip new block size */
1129         if (sequence->version >= 3)
1130                 data += 4;
1131
1132         for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
1133                 if (index + header_size > total) {
1134                         DRM_ERROR("Invalid sequence block (header)\n");
1135                         return NULL;
1136                 }
1137
1138                 current_id = *(data + index);
1139                 if (sequence->version >= 3)
1140                         current_size = *((const u32 *)(data + index + 1));
1141                 else
1142                         current_size = *((const u16 *)(data + index + 1));
1143
1144                 index += header_size;
1145
1146                 if (index + current_size > total) {
1147                         DRM_ERROR("Invalid sequence block\n");
1148                         return NULL;
1149                 }
1150
1151                 if (current_id == panel_id) {
1152                         *seq_size = current_size;
1153                         return data + index;
1154                 }
1155
1156                 index += current_size;
1157         }
1158
1159         DRM_ERROR("Sequence block detected but no valid configuration\n");
1160
1161         return NULL;
1162 }
1163
1164 static int goto_next_sequence(const u8 *data, int index, int total)
1165 {
1166         u16 len;
1167
1168         /* Skip Sequence Byte. */
1169         for (index = index + 1; index < total; index += len) {
1170                 u8 operation_byte = *(data + index);
1171                 index++;
1172
1173                 switch (operation_byte) {
1174                 case MIPI_SEQ_ELEM_END:
1175                         return index;
1176                 case MIPI_SEQ_ELEM_SEND_PKT:
1177                         if (index + 4 > total)
1178                                 return 0;
1179
1180                         len = *((const u16 *)(data + index + 2)) + 4;
1181                         break;
1182                 case MIPI_SEQ_ELEM_DELAY:
1183                         len = 4;
1184                         break;
1185                 case MIPI_SEQ_ELEM_GPIO:
1186                         len = 2;
1187                         break;
1188                 case MIPI_SEQ_ELEM_I2C:
1189                         if (index + 7 > total)
1190                                 return 0;
1191                         len = *(data + index + 6) + 7;
1192                         break;
1193                 default:
1194                         DRM_ERROR("Unknown operation byte\n");
1195                         return 0;
1196                 }
1197         }
1198
1199         return 0;
1200 }
1201
1202 static int goto_next_sequence_v3(const u8 *data, int index, int total)
1203 {
1204         int seq_end;
1205         u16 len;
1206         u32 size_of_sequence;
1207
1208         /*
1209          * Could skip sequence based on Size of Sequence alone, but also do some
1210          * checking on the structure.
1211          */
1212         if (total < 5) {
1213                 DRM_ERROR("Too small sequence size\n");
1214                 return 0;
1215         }
1216
1217         /* Skip Sequence Byte. */
1218         index++;
1219
1220         /*
1221          * Size of Sequence. Excludes the Sequence Byte and the size itself,
1222          * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
1223          * byte.
1224          */
1225         size_of_sequence = *((const u32 *)(data + index));
1226         index += 4;
1227
1228         seq_end = index + size_of_sequence;
1229         if (seq_end > total) {
1230                 DRM_ERROR("Invalid sequence size\n");
1231                 return 0;
1232         }
1233
1234         for (; index < total; index += len) {
1235                 u8 operation_byte = *(data + index);
1236                 index++;
1237
1238                 if (operation_byte == MIPI_SEQ_ELEM_END) {
1239                         if (index != seq_end) {
1240                                 DRM_ERROR("Invalid element structure\n");
1241                                 return 0;
1242                         }
1243                         return index;
1244                 }
1245
1246                 len = *(data + index);
1247                 index++;
1248
1249                 /*
1250                  * FIXME: Would be nice to check elements like for v1/v2 in
1251                  * goto_next_sequence() above.
1252                  */
1253                 switch (operation_byte) {
1254                 case MIPI_SEQ_ELEM_SEND_PKT:
1255                 case MIPI_SEQ_ELEM_DELAY:
1256                 case MIPI_SEQ_ELEM_GPIO:
1257                 case MIPI_SEQ_ELEM_I2C:
1258                 case MIPI_SEQ_ELEM_SPI:
1259                 case MIPI_SEQ_ELEM_PMIC:
1260                         break;
1261                 default:
1262                         DRM_ERROR("Unknown operation byte %u\n",
1263                                   operation_byte);
1264                         break;
1265                 }
1266         }
1267
1268         return 0;
1269 }
1270
1271 /*
1272  * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
1273  * skip all delay + gpio operands and stop at the first DSI packet op.
1274  */
1275 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *i915)
1276 {
1277         const u8 *data = i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1278         int index, len;
1279
1280         if (drm_WARN_ON(&i915->drm,
1281                         !data || i915->vbt.dsi.seq_version != 1))
1282                 return 0;
1283
1284         /* index = 1 to skip sequence byte */
1285         for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
1286                 switch (data[index]) {
1287                 case MIPI_SEQ_ELEM_SEND_PKT:
1288                         return index == 1 ? 0 : index;
1289                 case MIPI_SEQ_ELEM_DELAY:
1290                         len = 5; /* 1 byte for operand + uint32 */
1291                         break;
1292                 case MIPI_SEQ_ELEM_GPIO:
1293                         len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
1294                         break;
1295                 default:
1296                         return 0;
1297                 }
1298         }
1299
1300         return 0;
1301 }
1302
1303 /*
1304  * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
1305  * The deassert must be done before calling intel_dsi_device_ready, so for
1306  * these devices we split the init OTP sequence into a deassert sequence and
1307  * the actual init OTP part.
1308  */
1309 static void fixup_mipi_sequences(struct drm_i915_private *i915)
1310 {
1311         u8 *init_otp;
1312         int len;
1313
1314         /* Limit this to VLV for now. */
1315         if (!IS_VALLEYVIEW(i915))
1316                 return;
1317
1318         /* Limit this to v1 vid-mode sequences */
1319         if (i915->vbt.dsi.config->is_cmd_mode ||
1320             i915->vbt.dsi.seq_version != 1)
1321                 return;
1322
1323         /* Only do this if there are otp and assert seqs and no deassert seq */
1324         if (!i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1325             !i915->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1326             i915->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1327                 return;
1328
1329         /* The deassert-sequence ends at the first DSI packet */
1330         len = get_init_otp_deassert_fragment_len(i915);
1331         if (!len)
1332                 return;
1333
1334         drm_dbg_kms(&i915->drm,
1335                     "Using init OTP fragment to deassert reset\n");
1336
1337         /* Copy the fragment, update seq byte and terminate it */
1338         init_otp = (u8 *)i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1339         i915->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1340         if (!i915->vbt.dsi.deassert_seq)
1341                 return;
1342         i915->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1343         i915->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1344         /* Use the copy for deassert */
1345         i915->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1346                 i915->vbt.dsi.deassert_seq;
1347         /* Replace the last byte of the fragment with init OTP seq byte */
1348         init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1349         /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1350         i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1351 }
1352
1353 static void
1354 parse_mipi_sequence(struct drm_i915_private *i915,
1355                     const struct bdb_header *bdb)
1356 {
1357         int panel_type = i915->vbt.panel_type;
1358         const struct bdb_mipi_sequence *sequence;
1359         const u8 *seq_data;
1360         u32 seq_size;
1361         u8 *data;
1362         int index = 0;
1363
1364         /* Only our generic panel driver uses the sequence block. */
1365         if (i915->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
1366                 return;
1367
1368         sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
1369         if (!sequence) {
1370                 drm_dbg_kms(&i915->drm,
1371                             "No MIPI Sequence found, parsing complete\n");
1372                 return;
1373         }
1374
1375         /* Fail gracefully for forward incompatible sequence block. */
1376         if (sequence->version >= 4) {
1377                 drm_err(&i915->drm,
1378                         "Unable to parse MIPI Sequence Block v%u\n",
1379                         sequence->version);
1380                 return;
1381         }
1382
1383         drm_dbg(&i915->drm, "Found MIPI sequence block v%u\n",
1384                 sequence->version);
1385
1386         seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
1387         if (!seq_data)
1388                 return;
1389
1390         data = kmemdup(seq_data, seq_size, GFP_KERNEL);
1391         if (!data)
1392                 return;
1393
1394         /* Parse the sequences, store pointers to each sequence. */
1395         for (;;) {
1396                 u8 seq_id = *(data + index);
1397                 if (seq_id == MIPI_SEQ_END)
1398                         break;
1399
1400                 if (seq_id >= MIPI_SEQ_MAX) {
1401                         drm_err(&i915->drm, "Unknown sequence %u\n",
1402                                 seq_id);
1403                         goto err;
1404                 }
1405
1406                 /* Log about presence of sequences we won't run. */
1407                 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1408                         drm_dbg_kms(&i915->drm,
1409                                     "Unsupported sequence %u\n", seq_id);
1410
1411                 i915->vbt.dsi.sequence[seq_id] = data + index;
1412
1413                 if (sequence->version >= 3)
1414                         index = goto_next_sequence_v3(data, index, seq_size);
1415                 else
1416                         index = goto_next_sequence(data, index, seq_size);
1417                 if (!index) {
1418                         drm_err(&i915->drm, "Invalid sequence %u\n",
1419                                 seq_id);
1420                         goto err;
1421                 }
1422         }
1423
1424         i915->vbt.dsi.data = data;
1425         i915->vbt.dsi.size = seq_size;
1426         i915->vbt.dsi.seq_version = sequence->version;
1427
1428         fixup_mipi_sequences(i915);
1429
1430         drm_dbg(&i915->drm, "MIPI related VBT parsing complete\n");
1431         return;
1432
1433 err:
1434         kfree(data);
1435         memset(i915->vbt.dsi.sequence, 0, sizeof(i915->vbt.dsi.sequence));
1436 }
1437
1438 static void
1439 parse_compression_parameters(struct drm_i915_private *i915,
1440                              const struct bdb_header *bdb)
1441 {
1442         const struct bdb_compression_parameters *params;
1443         struct intel_bios_encoder_data *devdata;
1444         const struct child_device_config *child;
1445         u16 block_size;
1446         int index;
1447
1448         if (bdb->version < 198)
1449                 return;
1450
1451         params = find_section(bdb, BDB_COMPRESSION_PARAMETERS);
1452         if (params) {
1453                 /* Sanity checks */
1454                 if (params->entry_size != sizeof(params->data[0])) {
1455                         drm_dbg_kms(&i915->drm,
1456                                     "VBT: unsupported compression param entry size\n");
1457                         return;
1458                 }
1459
1460                 block_size = get_blocksize(params);
1461                 if (block_size < sizeof(*params)) {
1462                         drm_dbg_kms(&i915->drm,
1463                                     "VBT: expected 16 compression param entries\n");
1464                         return;
1465                 }
1466         }
1467
1468         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
1469                 child = &devdata->child;
1470
1471                 if (!child->compression_enable)
1472                         continue;
1473
1474                 if (!params) {
1475                         drm_dbg_kms(&i915->drm,
1476                                     "VBT: compression params not available\n");
1477                         continue;
1478                 }
1479
1480                 if (child->compression_method_cps) {
1481                         drm_dbg_kms(&i915->drm,
1482                                     "VBT: CPS compression not supported\n");
1483                         continue;
1484                 }
1485
1486                 index = child->compression_structure_index;
1487
1488                 devdata->dsc = kmemdup(&params->data[index],
1489                                        sizeof(*devdata->dsc), GFP_KERNEL);
1490         }
1491 }
1492
1493 static u8 translate_iboost(u8 val)
1494 {
1495         static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1496
1497         if (val >= ARRAY_SIZE(mapping)) {
1498                 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1499                 return 0;
1500         }
1501         return mapping[val];
1502 }
1503
1504 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
1505 {
1506         const struct ddi_vbt_port_info *info;
1507         enum port port;
1508
1509         if (!ddc_pin)
1510                 return PORT_NONE;
1511
1512         for_each_port(port) {
1513                 info = &i915->vbt.ddi_port_info[port];
1514
1515                 if (info->devdata && ddc_pin == info->alternate_ddc_pin)
1516                         return port;
1517         }
1518
1519         return PORT_NONE;
1520 }
1521
1522 static void sanitize_ddc_pin(struct drm_i915_private *i915,
1523                              enum port port)
1524 {
1525         struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
1526         struct child_device_config *child;
1527         enum port p;
1528
1529         p = get_port_by_ddc_pin(i915, info->alternate_ddc_pin);
1530         if (p == PORT_NONE)
1531                 return;
1532
1533         drm_dbg_kms(&i915->drm,
1534                     "port %c trying to use the same DDC pin (0x%x) as port %c, "
1535                     "disabling port %c DVI/HDMI support\n",
1536                     port_name(port), info->alternate_ddc_pin,
1537                     port_name(p), port_name(p));
1538
1539         /*
1540          * If we have multiple ports supposedly sharing the pin, then dvi/hdmi
1541          * couldn't exist on the shared port. Otherwise they share the same ddc
1542          * pin and system couldn't communicate with them separately.
1543          *
1544          * Give inverse child device order the priority, last one wins. Yes,
1545          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
1546          * port A and port E with the same AUX ch and we must pick port E :(
1547          */
1548         info = &i915->vbt.ddi_port_info[p];
1549         child = &info->devdata->child;
1550
1551         child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
1552         child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
1553
1554         info->alternate_ddc_pin = 0;
1555 }
1556
1557 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
1558 {
1559         const struct ddi_vbt_port_info *info;
1560         enum port port;
1561
1562         if (!aux_ch)
1563                 return PORT_NONE;
1564
1565         for_each_port(port) {
1566                 info = &i915->vbt.ddi_port_info[port];
1567
1568                 if (info->devdata && aux_ch == info->alternate_aux_channel)
1569                         return port;
1570         }
1571
1572         return PORT_NONE;
1573 }
1574
1575 static void sanitize_aux_ch(struct drm_i915_private *i915,
1576                             enum port port)
1577 {
1578         struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
1579         struct child_device_config *child;
1580         enum port p;
1581
1582         p = get_port_by_aux_ch(i915, info->alternate_aux_channel);
1583         if (p == PORT_NONE)
1584                 return;
1585
1586         drm_dbg_kms(&i915->drm,
1587                     "port %c trying to use the same AUX CH (0x%x) as port %c, "
1588                     "disabling port %c DP support\n",
1589                     port_name(port), info->alternate_aux_channel,
1590                     port_name(p), port_name(p));
1591
1592         /*
1593          * If we have multiple ports supposedly sharing the aux channel, then DP
1594          * couldn't exist on the shared port. Otherwise they share the same aux
1595          * channel and system couldn't communicate with them separately.
1596          *
1597          * Give inverse child device order the priority, last one wins. Yes,
1598          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
1599          * port A and port E with the same AUX ch and we must pick port E :(
1600          */
1601         info = &i915->vbt.ddi_port_info[p];
1602         child = &info->devdata->child;
1603
1604         child->device_type &= ~DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1605         info->alternate_aux_channel = 0;
1606 }
1607
1608 static const u8 cnp_ddc_pin_map[] = {
1609         [0] = 0, /* N/A */
1610         [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
1611         [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
1612         [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
1613         [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
1614 };
1615
1616 static const u8 icp_ddc_pin_map[] = {
1617         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1618         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1619         [TGL_DDC_BUS_DDI_C] = GMBUS_PIN_3_BXT,
1620         [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
1621         [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
1622         [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
1623         [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
1624         [TGL_DDC_BUS_PORT_5] = GMBUS_PIN_13_TC5_TGP,
1625         [TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
1626 };
1627
1628 static const u8 rkl_pch_tgp_ddc_pin_map[] = {
1629         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1630         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1631         [RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
1632         [RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
1633 };
1634
1635 static const u8 adls_ddc_pin_map[] = {
1636         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1637         [ADLS_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
1638         [ADLS_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
1639         [ADLS_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
1640         [ADLS_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
1641 };
1642
1643 static const u8 gen9bc_tgp_ddc_pin_map[] = {
1644         [DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1645         [DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
1646         [DDC_BUS_DDI_D] = GMBUS_PIN_10_TC2_ICP,
1647 };
1648
1649 static u8 map_ddc_pin(struct drm_i915_private *i915, u8 vbt_pin)
1650 {
1651         const u8 *ddc_pin_map;
1652         int n_entries;
1653
1654         if (HAS_PCH_ADP(i915)) {
1655                 ddc_pin_map = adls_ddc_pin_map;
1656                 n_entries = ARRAY_SIZE(adls_ddc_pin_map);
1657         } else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) {
1658                 return vbt_pin;
1659         } else if (IS_ROCKETLAKE(i915) && INTEL_PCH_TYPE(i915) == PCH_TGP) {
1660                 ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
1661                 n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
1662         } else if (HAS_PCH_TGP(i915) && DISPLAY_VER(i915) == 9) {
1663                 ddc_pin_map = gen9bc_tgp_ddc_pin_map;
1664                 n_entries = ARRAY_SIZE(gen9bc_tgp_ddc_pin_map);
1665         } else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) {
1666                 ddc_pin_map = icp_ddc_pin_map;
1667                 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
1668         } else if (HAS_PCH_CNP(i915)) {
1669                 ddc_pin_map = cnp_ddc_pin_map;
1670                 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
1671         } else {
1672                 /* Assuming direct map */
1673                 return vbt_pin;
1674         }
1675
1676         if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
1677                 return ddc_pin_map[vbt_pin];
1678
1679         drm_dbg_kms(&i915->drm,
1680                     "Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
1681                     vbt_pin);
1682         return 0;
1683 }
1684
1685 static enum port __dvo_port_to_port(int n_ports, int n_dvo,
1686                                     const int port_mapping[][3], u8 dvo_port)
1687 {
1688         enum port port;
1689         int i;
1690
1691         for (port = PORT_A; port < n_ports; port++) {
1692                 for (i = 0; i < n_dvo; i++) {
1693                         if (port_mapping[port][i] == -1)
1694                                 break;
1695
1696                         if (dvo_port == port_mapping[port][i])
1697                                 return port;
1698                 }
1699         }
1700
1701         return PORT_NONE;
1702 }
1703
1704 static enum port dvo_port_to_port(struct drm_i915_private *i915,
1705                                   u8 dvo_port)
1706 {
1707         /*
1708          * Each DDI port can have more than one value on the "DVO Port" field,
1709          * so look for all the possible values for each port.
1710          */
1711         static const int port_mapping[][3] = {
1712                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1713                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1714                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1715                 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1716                 [PORT_E] = { DVO_PORT_HDMIE, DVO_PORT_DPE, DVO_PORT_CRT },
1717                 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
1718                 [PORT_G] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
1719                 [PORT_H] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
1720                 [PORT_I] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
1721         };
1722         /*
1723          * RKL VBT uses PHY based mapping. Combo PHYs A,B,C,D
1724          * map to DDI A,B,TC1,TC2 respectively.
1725          */
1726         static const int rkl_port_mapping[][3] = {
1727                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1728                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1729                 [PORT_C] = { -1 },
1730                 [PORT_TC1] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1731                 [PORT_TC2] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1732         };
1733         /*
1734          * Alderlake S ports used in the driver are PORT_A, PORT_D, PORT_E,
1735          * PORT_F and PORT_G, we need to map that to correct VBT sections.
1736          */
1737         static const int adls_port_mapping[][3] = {
1738                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1739                 [PORT_B] = { -1 },
1740                 [PORT_C] = { -1 },
1741                 [PORT_TC1] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1742                 [PORT_TC2] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1743                 [PORT_TC3] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1744                 [PORT_TC4] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
1745         };
1746
1747         if (IS_ALDERLAKE_S(i915))
1748                 return __dvo_port_to_port(ARRAY_SIZE(adls_port_mapping),
1749                                           ARRAY_SIZE(adls_port_mapping[0]),
1750                                           adls_port_mapping,
1751                                           dvo_port);
1752         else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
1753                 return __dvo_port_to_port(ARRAY_SIZE(rkl_port_mapping),
1754                                           ARRAY_SIZE(rkl_port_mapping[0]),
1755                                           rkl_port_mapping,
1756                                           dvo_port);
1757         else
1758                 return __dvo_port_to_port(ARRAY_SIZE(port_mapping),
1759                                           ARRAY_SIZE(port_mapping[0]),
1760                                           port_mapping,
1761                                           dvo_port);
1762 }
1763
1764 static int parse_bdb_230_dp_max_link_rate(const int vbt_max_link_rate)
1765 {
1766         switch (vbt_max_link_rate) {
1767         default:
1768         case BDB_230_VBT_DP_MAX_LINK_RATE_DEF:
1769                 return 0;
1770         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20:
1771                 return 2000000;
1772         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5:
1773                 return 1350000;
1774         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10:
1775                 return 1000000;
1776         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3:
1777                 return 810000;
1778         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2:
1779                 return 540000;
1780         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR:
1781                 return 270000;
1782         case BDB_230_VBT_DP_MAX_LINK_RATE_LBR:
1783                 return 162000;
1784         }
1785 }
1786
1787 static int parse_bdb_216_dp_max_link_rate(const int vbt_max_link_rate)
1788 {
1789         switch (vbt_max_link_rate) {
1790         default:
1791         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3:
1792                 return 810000;
1793         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2:
1794                 return 540000;
1795         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR:
1796                 return 270000;
1797         case BDB_216_VBT_DP_MAX_LINK_RATE_LBR:
1798                 return 162000;
1799         }
1800 }
1801
1802 static void sanitize_device_type(struct intel_bios_encoder_data *devdata,
1803                                  enum port port)
1804 {
1805         struct drm_i915_private *i915 = devdata->i915;
1806         bool is_hdmi;
1807
1808         if (port != PORT_A || DISPLAY_VER(i915) >= 12)
1809                 return;
1810
1811         if (!(devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING))
1812                 return;
1813
1814         is_hdmi = !(devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT);
1815
1816         drm_dbg_kms(&i915->drm, "VBT claims port A supports DVI%s, ignoring\n",
1817                     is_hdmi ? "/HDMI" : "");
1818
1819         devdata->child.device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
1820         devdata->child.device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
1821 }
1822
1823 static bool
1824 intel_bios_encoder_supports_crt(const struct intel_bios_encoder_data *devdata)
1825 {
1826         return devdata->child.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1827 }
1828
1829 bool
1830 intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata)
1831 {
1832         return devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1833 }
1834
1835 bool
1836 intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata)
1837 {
1838         return intel_bios_encoder_supports_dvi(devdata) &&
1839                 (devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1840 }
1841
1842 bool
1843 intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata)
1844 {
1845         return devdata->child.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1846 }
1847
1848 static bool
1849 intel_bios_encoder_supports_edp(const struct intel_bios_encoder_data *devdata)
1850 {
1851         return intel_bios_encoder_supports_dp(devdata) &&
1852                 devdata->child.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR;
1853 }
1854
1855 static void parse_ddi_port(struct drm_i915_private *i915,
1856                            struct intel_bios_encoder_data *devdata)
1857 {
1858         const struct child_device_config *child = &devdata->child;
1859         struct ddi_vbt_port_info *info;
1860         bool is_dvi, is_hdmi, is_dp, is_edp, is_crt, supports_typec_usb, supports_tbt;
1861         int dp_boost_level, hdmi_boost_level;
1862         enum port port;
1863
1864         port = dvo_port_to_port(i915, child->dvo_port);
1865         if (port == PORT_NONE)
1866                 return;
1867
1868         info = &i915->vbt.ddi_port_info[port];
1869
1870         if (info->devdata) {
1871                 drm_dbg_kms(&i915->drm,
1872                             "More than one child device for port %c in VBT, using the first.\n",
1873                             port_name(port));
1874                 return;
1875         }
1876
1877         sanitize_device_type(devdata, port);
1878
1879         is_dvi = intel_bios_encoder_supports_dvi(devdata);
1880         is_dp = intel_bios_encoder_supports_dp(devdata);
1881         is_crt = intel_bios_encoder_supports_crt(devdata);
1882         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
1883         is_edp = intel_bios_encoder_supports_edp(devdata);
1884
1885         supports_typec_usb = intel_bios_encoder_supports_typec_usb(devdata);
1886         supports_tbt = intel_bios_encoder_supports_tbt(devdata);
1887
1888         drm_dbg_kms(&i915->drm,
1889                     "Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d LSPCON:%d USB-Type-C:%d TBT:%d DSC:%d\n",
1890                     port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp,
1891                     HAS_LSPCON(i915) && child->lspcon,
1892                     supports_typec_usb, supports_tbt,
1893                     devdata->dsc != NULL);
1894
1895         if (is_dvi) {
1896                 u8 ddc_pin;
1897
1898                 ddc_pin = map_ddc_pin(i915, child->ddc_pin);
1899                 if (intel_gmbus_is_valid_pin(i915, ddc_pin)) {
1900                         info->alternate_ddc_pin = ddc_pin;
1901                         sanitize_ddc_pin(i915, port);
1902                 } else {
1903                         drm_dbg_kms(&i915->drm,
1904                                     "Port %c has invalid DDC pin %d, "
1905                                     "sticking to defaults\n",
1906                                     port_name(port), ddc_pin);
1907                 }
1908         }
1909
1910         if (is_dp) {
1911                 info->alternate_aux_channel = child->aux_channel;
1912
1913                 sanitize_aux_ch(i915, port);
1914         }
1915
1916         if (i915->vbt.version >= 158) {
1917                 /* The VBT HDMI level shift values match the table we have. */
1918                 u8 hdmi_level_shift = child->hdmi_level_shifter_value;
1919                 drm_dbg_kms(&i915->drm,
1920                             "Port %c VBT HDMI level shift: %d\n",
1921                             port_name(port),
1922                             hdmi_level_shift);
1923                 info->hdmi_level_shift = hdmi_level_shift;
1924                 info->hdmi_level_shift_set = true;
1925         }
1926
1927         if (i915->vbt.version >= 204) {
1928                 int max_tmds_clock;
1929
1930                 switch (child->hdmi_max_data_rate) {
1931                 default:
1932                         MISSING_CASE(child->hdmi_max_data_rate);
1933                         fallthrough;
1934                 case HDMI_MAX_DATA_RATE_PLATFORM:
1935                         max_tmds_clock = 0;
1936                         break;
1937                 case HDMI_MAX_DATA_RATE_297:
1938                         max_tmds_clock = 297000;
1939                         break;
1940                 case HDMI_MAX_DATA_RATE_165:
1941                         max_tmds_clock = 165000;
1942                         break;
1943                 }
1944
1945                 if (max_tmds_clock)
1946                         drm_dbg_kms(&i915->drm,
1947                                     "Port %c VBT HDMI max TMDS clock: %d kHz\n",
1948                                     port_name(port), max_tmds_clock);
1949                 info->max_tmds_clock = max_tmds_clock;
1950         }
1951
1952         /* I_boost config for SKL and above */
1953         dp_boost_level = intel_bios_encoder_dp_boost_level(devdata);
1954         if (dp_boost_level)
1955                 drm_dbg_kms(&i915->drm,
1956                             "Port %c VBT (e)DP boost level: %d\n",
1957                             port_name(port), dp_boost_level);
1958
1959         hdmi_boost_level = intel_bios_encoder_hdmi_boost_level(devdata);
1960         if (hdmi_boost_level)
1961                 drm_dbg_kms(&i915->drm,
1962                             "Port %c VBT HDMI boost level: %d\n",
1963                             port_name(port), hdmi_boost_level);
1964
1965         /* DP max link rate for CNL+ */
1966         if (i915->vbt.version >= 216) {
1967                 if (i915->vbt.version >= 230)
1968                         info->dp_max_link_rate = parse_bdb_230_dp_max_link_rate(child->dp_max_link_rate);
1969                 else
1970                         info->dp_max_link_rate = parse_bdb_216_dp_max_link_rate(child->dp_max_link_rate);
1971
1972                 drm_dbg_kms(&i915->drm,
1973                             "Port %c VBT DP max link rate: %d\n",
1974                             port_name(port), info->dp_max_link_rate);
1975         }
1976
1977         info->devdata = devdata;
1978 }
1979
1980 static void parse_ddi_ports(struct drm_i915_private *i915)
1981 {
1982         struct intel_bios_encoder_data *devdata;
1983
1984         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
1985                 return;
1986
1987         if (i915->vbt.version < 155)
1988                 return;
1989
1990         list_for_each_entry(devdata, &i915->vbt.display_devices, node)
1991                 parse_ddi_port(i915, devdata);
1992 }
1993
1994 static void
1995 parse_general_definitions(struct drm_i915_private *i915,
1996                           const struct bdb_header *bdb)
1997 {
1998         const struct bdb_general_definitions *defs;
1999         struct intel_bios_encoder_data *devdata;
2000         const struct child_device_config *child;
2001         int i, child_device_num;
2002         u8 expected_size;
2003         u16 block_size;
2004         int bus_pin;
2005
2006         defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
2007         if (!defs) {
2008                 drm_dbg_kms(&i915->drm,
2009                             "No general definition block is found, no devices defined.\n");
2010                 return;
2011         }
2012
2013         block_size = get_blocksize(defs);
2014         if (block_size < sizeof(*defs)) {
2015                 drm_dbg_kms(&i915->drm,
2016                             "General definitions block too small (%u)\n",
2017                             block_size);
2018                 return;
2019         }
2020
2021         bus_pin = defs->crt_ddc_gmbus_pin;
2022         drm_dbg_kms(&i915->drm, "crt_ddc_bus_pin: %d\n", bus_pin);
2023         if (intel_gmbus_is_valid_pin(i915, bus_pin))
2024                 i915->vbt.crt_ddc_pin = bus_pin;
2025
2026         if (bdb->version < 106) {
2027                 expected_size = 22;
2028         } else if (bdb->version < 111) {
2029                 expected_size = 27;
2030         } else if (bdb->version < 195) {
2031                 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
2032         } else if (bdb->version == 195) {
2033                 expected_size = 37;
2034         } else if (bdb->version <= 215) {
2035                 expected_size = 38;
2036         } else if (bdb->version <= 237) {
2037                 expected_size = 39;
2038         } else {
2039                 expected_size = sizeof(*child);
2040                 BUILD_BUG_ON(sizeof(*child) < 39);
2041                 drm_dbg(&i915->drm,
2042                         "Expected child device config size for VBT version %u not known; assuming %u\n",
2043                         bdb->version, expected_size);
2044         }
2045
2046         /* Flag an error for unexpected size, but continue anyway. */
2047         if (defs->child_dev_size != expected_size)
2048                 drm_err(&i915->drm,
2049                         "Unexpected child device config size %u (expected %u for VBT version %u)\n",
2050                         defs->child_dev_size, expected_size, bdb->version);
2051
2052         /* The legacy sized child device config is the minimum we need. */
2053         if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
2054                 drm_dbg_kms(&i915->drm,
2055                             "Child device config size %u is too small.\n",
2056                             defs->child_dev_size);
2057                 return;
2058         }
2059
2060         /* get the number of child device */
2061         child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
2062
2063         for (i = 0; i < child_device_num; i++) {
2064                 child = child_device_ptr(defs, i);
2065                 if (!child->device_type)
2066                         continue;
2067
2068                 drm_dbg_kms(&i915->drm,
2069                             "Found VBT child device with type 0x%x\n",
2070                             child->device_type);
2071
2072                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2073                 if (!devdata)
2074                         break;
2075
2076                 devdata->i915 = i915;
2077
2078                 /*
2079                  * Copy as much as we know (sizeof) and is available
2080                  * (child_dev_size) of the child device config. Accessing the
2081                  * data must depend on VBT version.
2082                  */
2083                 memcpy(&devdata->child, child,
2084                        min_t(size_t, defs->child_dev_size, sizeof(*child)));
2085
2086                 list_add_tail(&devdata->node, &i915->vbt.display_devices);
2087         }
2088
2089         if (list_empty(&i915->vbt.display_devices))
2090                 drm_dbg_kms(&i915->drm,
2091                             "no child dev is parsed from VBT\n");
2092 }
2093
2094 /* Common defaults which may be overridden by VBT. */
2095 static void
2096 init_vbt_defaults(struct drm_i915_private *i915)
2097 {
2098         i915->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2099
2100         /* Default to having backlight */
2101         i915->vbt.backlight.present = true;
2102
2103         /* LFP panel data */
2104         i915->vbt.lvds_dither = 1;
2105
2106         /* SDVO panel data */
2107         i915->vbt.sdvo_lvds_vbt_mode = NULL;
2108
2109         /* general features */
2110         i915->vbt.int_tv_support = 1;
2111         i915->vbt.int_crt_support = 1;
2112
2113         /* driver features */
2114         i915->vbt.int_lvds_support = 1;
2115
2116         /* Default to using SSC */
2117         i915->vbt.lvds_use_ssc = 1;
2118         /*
2119          * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
2120          * clock for LVDS.
2121          */
2122         i915->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(i915,
2123                                                            !HAS_PCH_SPLIT(i915));
2124         drm_dbg_kms(&i915->drm, "Set default to SSC at %d kHz\n",
2125                     i915->vbt.lvds_ssc_freq);
2126 }
2127
2128 /* Defaults to initialize only if there is no VBT. */
2129 static void
2130 init_vbt_missing_defaults(struct drm_i915_private *i915)
2131 {
2132         enum port port;
2133         int ports = PORT_A | PORT_B | PORT_C | PORT_D | PORT_E | PORT_F;
2134
2135         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
2136                 return;
2137
2138         for_each_port_masked(port, ports) {
2139                 struct intel_bios_encoder_data *devdata;
2140                 struct child_device_config *child;
2141                 enum phy phy = intel_port_to_phy(i915, port);
2142
2143                 /*
2144                  * VBT has the TypeC mode (native,TBT/USB) and we don't want
2145                  * to detect it.
2146                  */
2147                 if (intel_phy_is_tc(i915, phy))
2148                         continue;
2149
2150                 /* Create fake child device config */
2151                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2152                 if (!devdata)
2153                         break;
2154
2155                 devdata->i915 = i915;
2156                 child = &devdata->child;
2157
2158                 if (port == PORT_F)
2159                         child->dvo_port = DVO_PORT_HDMIF;
2160                 else if (port == PORT_E)
2161                         child->dvo_port = DVO_PORT_HDMIE;
2162                 else
2163                         child->dvo_port = DVO_PORT_HDMIA + port;
2164
2165                 if (port != PORT_A && port != PORT_E)
2166                         child->device_type |= DEVICE_TYPE_TMDS_DVI_SIGNALING;
2167
2168                 if (port != PORT_E)
2169                         child->device_type |= DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2170
2171                 if (port == PORT_A)
2172                         child->device_type |= DEVICE_TYPE_INTERNAL_CONNECTOR;
2173
2174                 list_add_tail(&devdata->node, &i915->vbt.display_devices);
2175
2176                 drm_dbg_kms(&i915->drm,
2177                             "Generating default VBT child device with type 0x04%x on port %c\n",
2178                             child->device_type, port_name(port));
2179         }
2180
2181         /* Bypass some minimum baseline VBT version checks */
2182         i915->vbt.version = 155;
2183 }
2184
2185 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
2186 {
2187         const void *_vbt = vbt;
2188
2189         return _vbt + vbt->bdb_offset;
2190 }
2191
2192 /**
2193  * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
2194  * @buf:        pointer to a buffer to validate
2195  * @size:       size of the buffer
2196  *
2197  * Returns true on valid VBT.
2198  */
2199 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
2200 {
2201         const struct vbt_header *vbt = buf;
2202         const struct bdb_header *bdb;
2203
2204         if (!vbt)
2205                 return false;
2206
2207         if (sizeof(struct vbt_header) > size) {
2208                 DRM_DEBUG_DRIVER("VBT header incomplete\n");
2209                 return false;
2210         }
2211
2212         if (memcmp(vbt->signature, "$VBT", 4)) {
2213                 DRM_DEBUG_DRIVER("VBT invalid signature\n");
2214                 return false;
2215         }
2216
2217         if (vbt->vbt_size > size) {
2218                 DRM_DEBUG_DRIVER("VBT incomplete (vbt_size overflows)\n");
2219                 return false;
2220         }
2221
2222         size = vbt->vbt_size;
2223
2224         if (range_overflows_t(size_t,
2225                               vbt->bdb_offset,
2226                               sizeof(struct bdb_header),
2227                               size)) {
2228                 DRM_DEBUG_DRIVER("BDB header incomplete\n");
2229                 return false;
2230         }
2231
2232         bdb = get_bdb_header(vbt);
2233         if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
2234                 DRM_DEBUG_DRIVER("BDB incomplete\n");
2235                 return false;
2236         }
2237
2238         return vbt;
2239 }
2240
2241 static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915)
2242 {
2243         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
2244         void __iomem *p = NULL, *oprom;
2245         struct vbt_header *vbt;
2246         u16 vbt_size;
2247         size_t i, size;
2248
2249         oprom = pci_map_rom(pdev, &size);
2250         if (!oprom)
2251                 return NULL;
2252
2253         /* Scour memory looking for the VBT signature. */
2254         for (i = 0; i + 4 < size; i += 4) {
2255                 if (ioread32(oprom + i) != *((const u32 *)"$VBT"))
2256                         continue;
2257
2258                 p = oprom + i;
2259                 size -= i;
2260                 break;
2261         }
2262
2263         if (!p)
2264                 goto err_unmap_oprom;
2265
2266         if (sizeof(struct vbt_header) > size) {
2267                 drm_dbg(&i915->drm, "VBT header incomplete\n");
2268                 goto err_unmap_oprom;
2269         }
2270
2271         vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
2272         if (vbt_size > size) {
2273                 drm_dbg(&i915->drm,
2274                         "VBT incomplete (vbt_size overflows)\n");
2275                 goto err_unmap_oprom;
2276         }
2277
2278         /* The rest will be validated by intel_bios_is_valid_vbt() */
2279         vbt = kmalloc(vbt_size, GFP_KERNEL);
2280         if (!vbt)
2281                 goto err_unmap_oprom;
2282
2283         memcpy_fromio(vbt, p, vbt_size);
2284
2285         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
2286                 goto err_free_vbt;
2287
2288         pci_unmap_rom(pdev, oprom);
2289
2290         return vbt;
2291
2292 err_free_vbt:
2293         kfree(vbt);
2294 err_unmap_oprom:
2295         pci_unmap_rom(pdev, oprom);
2296
2297         return NULL;
2298 }
2299
2300 /**
2301  * intel_bios_init - find VBT and initialize settings from the BIOS
2302  * @i915: i915 device instance
2303  *
2304  * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
2305  * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
2306  * initialize some defaults if the VBT is not present at all.
2307  */
2308 void intel_bios_init(struct drm_i915_private *i915)
2309 {
2310         const struct vbt_header *vbt = i915->opregion.vbt;
2311         struct vbt_header *oprom_vbt = NULL;
2312         const struct bdb_header *bdb;
2313
2314         INIT_LIST_HEAD(&i915->vbt.display_devices);
2315
2316         if (!HAS_DISPLAY(i915)) {
2317                 drm_dbg_kms(&i915->drm,
2318                             "Skipping VBT init due to disabled display.\n");
2319                 return;
2320         }
2321
2322         init_vbt_defaults(i915);
2323
2324         /* If the OpRegion does not have VBT, look in PCI ROM. */
2325         if (!vbt) {
2326                 oprom_vbt = oprom_get_vbt(i915);
2327                 if (!oprom_vbt)
2328                         goto out;
2329
2330                 vbt = oprom_vbt;
2331
2332                 drm_dbg_kms(&i915->drm, "Found valid VBT in PCI ROM\n");
2333         }
2334
2335         bdb = get_bdb_header(vbt);
2336         i915->vbt.version = bdb->version;
2337
2338         drm_dbg_kms(&i915->drm,
2339                     "VBT signature \"%.*s\", BDB version %d\n",
2340                     (int)sizeof(vbt->signature), vbt->signature, bdb->version);
2341
2342         /* Grab useful general definitions */
2343         parse_general_features(i915, bdb);
2344         parse_general_definitions(i915, bdb);
2345         parse_panel_options(i915, bdb);
2346         parse_panel_dtd(i915, bdb);
2347         parse_lfp_backlight(i915, bdb);
2348         parse_sdvo_panel_data(i915, bdb);
2349         parse_driver_features(i915, bdb);
2350         parse_power_conservation_features(i915, bdb);
2351         parse_edp(i915, bdb);
2352         parse_psr(i915, bdb);
2353         parse_mipi_config(i915, bdb);
2354         parse_mipi_sequence(i915, bdb);
2355
2356         /* Depends on child device list */
2357         parse_compression_parameters(i915, bdb);
2358
2359 out:
2360         if (!vbt) {
2361                 drm_info(&i915->drm,
2362                          "Failed to find VBIOS tables (VBT)\n");
2363                 init_vbt_missing_defaults(i915);
2364         }
2365
2366         /* Further processing on pre-parsed or generated child device data */
2367         parse_sdvo_device_mapping(i915);
2368         parse_ddi_ports(i915);
2369
2370         kfree(oprom_vbt);
2371 }
2372
2373 /**
2374  * intel_bios_driver_remove - Free any resources allocated by intel_bios_init()
2375  * @i915: i915 device instance
2376  */
2377 void intel_bios_driver_remove(struct drm_i915_private *i915)
2378 {
2379         struct intel_bios_encoder_data *devdata, *n;
2380
2381         list_for_each_entry_safe(devdata, n, &i915->vbt.display_devices, node) {
2382                 list_del(&devdata->node);
2383                 kfree(devdata->dsc);
2384                 kfree(devdata);
2385         }
2386
2387         kfree(i915->vbt.sdvo_lvds_vbt_mode);
2388         i915->vbt.sdvo_lvds_vbt_mode = NULL;
2389         kfree(i915->vbt.lfp_lvds_vbt_mode);
2390         i915->vbt.lfp_lvds_vbt_mode = NULL;
2391         kfree(i915->vbt.dsi.data);
2392         i915->vbt.dsi.data = NULL;
2393         kfree(i915->vbt.dsi.pps);
2394         i915->vbt.dsi.pps = NULL;
2395         kfree(i915->vbt.dsi.config);
2396         i915->vbt.dsi.config = NULL;
2397         kfree(i915->vbt.dsi.deassert_seq);
2398         i915->vbt.dsi.deassert_seq = NULL;
2399 }
2400
2401 /**
2402  * intel_bios_is_tv_present - is integrated TV present in VBT
2403  * @i915: i915 device instance
2404  *
2405  * Return true if TV is present. If no child devices were parsed from VBT,
2406  * assume TV is present.
2407  */
2408 bool intel_bios_is_tv_present(struct drm_i915_private *i915)
2409 {
2410         const struct intel_bios_encoder_data *devdata;
2411         const struct child_device_config *child;
2412
2413         if (!i915->vbt.int_tv_support)
2414                 return false;
2415
2416         if (list_empty(&i915->vbt.display_devices))
2417                 return true;
2418
2419         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2420                 child = &devdata->child;
2421
2422                 /*
2423                  * If the device type is not TV, continue.
2424                  */
2425                 switch (child->device_type) {
2426                 case DEVICE_TYPE_INT_TV:
2427                 case DEVICE_TYPE_TV:
2428                 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
2429                         break;
2430                 default:
2431                         continue;
2432                 }
2433                 /* Only when the addin_offset is non-zero, it is regarded
2434                  * as present.
2435                  */
2436                 if (child->addin_offset)
2437                         return true;
2438         }
2439
2440         return false;
2441 }
2442
2443 /**
2444  * intel_bios_is_lvds_present - is LVDS present in VBT
2445  * @i915:       i915 device instance
2446  * @i2c_pin:    i2c pin for LVDS if present
2447  *
2448  * Return true if LVDS is present. If no child devices were parsed from VBT,
2449  * assume LVDS is present.
2450  */
2451 bool intel_bios_is_lvds_present(struct drm_i915_private *i915, u8 *i2c_pin)
2452 {
2453         const struct intel_bios_encoder_data *devdata;
2454         const struct child_device_config *child;
2455
2456         if (list_empty(&i915->vbt.display_devices))
2457                 return true;
2458
2459         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2460                 child = &devdata->child;
2461
2462                 /* If the device type is not LFP, continue.
2463                  * We have to check both the new identifiers as well as the
2464                  * old for compatibility with some BIOSes.
2465                  */
2466                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
2467                     child->device_type != DEVICE_TYPE_LFP)
2468                         continue;
2469
2470                 if (intel_gmbus_is_valid_pin(i915, child->i2c_pin))
2471                         *i2c_pin = child->i2c_pin;
2472
2473                 /* However, we cannot trust the BIOS writers to populate
2474                  * the VBT correctly.  Since LVDS requires additional
2475                  * information from AIM blocks, a non-zero addin offset is
2476                  * a good indicator that the LVDS is actually present.
2477                  */
2478                 if (child->addin_offset)
2479                         return true;
2480
2481                 /* But even then some BIOS writers perform some black magic
2482                  * and instantiate the device without reference to any
2483                  * additional data.  Trust that if the VBT was written into
2484                  * the OpRegion then they have validated the LVDS's existence.
2485                  */
2486                 if (i915->opregion.vbt)
2487                         return true;
2488         }
2489
2490         return false;
2491 }
2492
2493 /**
2494  * intel_bios_is_port_present - is the specified digital port present
2495  * @i915:       i915 device instance
2496  * @port:       port to check
2497  *
2498  * Return true if the device in %port is present.
2499  */
2500 bool intel_bios_is_port_present(struct drm_i915_private *i915, enum port port)
2501 {
2502         const struct intel_bios_encoder_data *devdata;
2503         const struct child_device_config *child;
2504         static const struct {
2505                 u16 dp, hdmi;
2506         } port_mapping[] = {
2507                 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2508                 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2509                 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2510                 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2511                 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2512         };
2513
2514         if (HAS_DDI(i915)) {
2515                 const struct ddi_vbt_port_info *port_info =
2516                         &i915->vbt.ddi_port_info[port];
2517
2518                 return port_info->devdata;
2519         }
2520
2521         /* FIXME maybe deal with port A as well? */
2522         if (drm_WARN_ON(&i915->drm,
2523                         port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
2524                 return false;
2525
2526         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2527                 child = &devdata->child;
2528
2529                 if ((child->dvo_port == port_mapping[port].dp ||
2530                      child->dvo_port == port_mapping[port].hdmi) &&
2531                     (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
2532                                            DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
2533                         return true;
2534         }
2535
2536         return false;
2537 }
2538
2539 /**
2540  * intel_bios_is_port_edp - is the device in given port eDP
2541  * @i915:       i915 device instance
2542  * @port:       port to check
2543  *
2544  * Return true if the device in %port is eDP.
2545  */
2546 bool intel_bios_is_port_edp(struct drm_i915_private *i915, enum port port)
2547 {
2548         const struct intel_bios_encoder_data *devdata;
2549         const struct child_device_config *child;
2550         static const short port_mapping[] = {
2551                 [PORT_B] = DVO_PORT_DPB,
2552                 [PORT_C] = DVO_PORT_DPC,
2553                 [PORT_D] = DVO_PORT_DPD,
2554                 [PORT_E] = DVO_PORT_DPE,
2555                 [PORT_F] = DVO_PORT_DPF,
2556         };
2557
2558         if (HAS_DDI(i915)) {
2559                 const struct intel_bios_encoder_data *devdata;
2560
2561                 devdata = intel_bios_encoder_data_lookup(i915, port);
2562
2563                 return devdata && intel_bios_encoder_supports_edp(devdata);
2564         }
2565
2566         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2567                 child = &devdata->child;
2568
2569                 if (child->dvo_port == port_mapping[port] &&
2570                     (child->device_type & DEVICE_TYPE_eDP_BITS) ==
2571                     (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
2572                         return true;
2573         }
2574
2575         return false;
2576 }
2577
2578 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
2579                                       enum port port)
2580 {
2581         static const struct {
2582                 u16 dp, hdmi;
2583         } port_mapping[] = {
2584                 /*
2585                  * Buggy VBTs may declare DP ports as having
2586                  * HDMI type dvo_port :( So let's check both.
2587                  */
2588                 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2589                 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2590                 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2591                 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2592                 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2593         };
2594
2595         if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
2596                 return false;
2597
2598         if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
2599             (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
2600                 return false;
2601
2602         if (child->dvo_port == port_mapping[port].dp)
2603                 return true;
2604
2605         /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
2606         if (child->dvo_port == port_mapping[port].hdmi &&
2607             child->aux_channel != 0)
2608                 return true;
2609
2610         return false;
2611 }
2612
2613 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *i915,
2614                                      enum port port)
2615 {
2616         const struct intel_bios_encoder_data *devdata;
2617
2618         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2619                 if (child_dev_is_dp_dual_mode(&devdata->child, port))
2620                         return true;
2621         }
2622
2623         return false;
2624 }
2625
2626 /**
2627  * intel_bios_is_dsi_present - is DSI present in VBT
2628  * @i915:       i915 device instance
2629  * @port:       port for DSI if present
2630  *
2631  * Return true if DSI is present, and return the port in %port.
2632  */
2633 bool intel_bios_is_dsi_present(struct drm_i915_private *i915,
2634                                enum port *port)
2635 {
2636         const struct intel_bios_encoder_data *devdata;
2637         const struct child_device_config *child;
2638         u8 dvo_port;
2639
2640         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2641                 child = &devdata->child;
2642
2643                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2644                         continue;
2645
2646                 dvo_port = child->dvo_port;
2647
2648                 if (dvo_port == DVO_PORT_MIPIA ||
2649                     (dvo_port == DVO_PORT_MIPIB && DISPLAY_VER(i915) >= 11) ||
2650                     (dvo_port == DVO_PORT_MIPIC && DISPLAY_VER(i915) < 11)) {
2651                         if (port)
2652                                 *port = dvo_port - DVO_PORT_MIPIA;
2653                         return true;
2654                 } else if (dvo_port == DVO_PORT_MIPIB ||
2655                            dvo_port == DVO_PORT_MIPIC ||
2656                            dvo_port == DVO_PORT_MIPID) {
2657                         drm_dbg_kms(&i915->drm,
2658                                     "VBT has unsupported DSI port %c\n",
2659                                     port_name(dvo_port - DVO_PORT_MIPIA));
2660                 }
2661         }
2662
2663         return false;
2664 }
2665
2666 static void fill_dsc(struct intel_crtc_state *crtc_state,
2667                      struct dsc_compression_parameters_entry *dsc,
2668                      int dsc_max_bpc)
2669 {
2670         struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
2671         int bpc = 8;
2672
2673         vdsc_cfg->dsc_version_major = dsc->version_major;
2674         vdsc_cfg->dsc_version_minor = dsc->version_minor;
2675
2676         if (dsc->support_12bpc && dsc_max_bpc >= 12)
2677                 bpc = 12;
2678         else if (dsc->support_10bpc && dsc_max_bpc >= 10)
2679                 bpc = 10;
2680         else if (dsc->support_8bpc && dsc_max_bpc >= 8)
2681                 bpc = 8;
2682         else
2683                 DRM_DEBUG_KMS("VBT: Unsupported BPC %d for DCS\n",
2684                               dsc_max_bpc);
2685
2686         crtc_state->pipe_bpp = bpc * 3;
2687
2688         crtc_state->dsc.compressed_bpp = min(crtc_state->pipe_bpp,
2689                                              VBT_DSC_MAX_BPP(dsc->max_bpp));
2690
2691         /*
2692          * FIXME: This is ugly, and slice count should take DSC engine
2693          * throughput etc. into account.
2694          *
2695          * Also, per spec DSI supports 1, 2, 3 or 4 horizontal slices.
2696          */
2697         if (dsc->slices_per_line & BIT(2)) {
2698                 crtc_state->dsc.slice_count = 4;
2699         } else if (dsc->slices_per_line & BIT(1)) {
2700                 crtc_state->dsc.slice_count = 2;
2701         } else {
2702                 /* FIXME */
2703                 if (!(dsc->slices_per_line & BIT(0)))
2704                         DRM_DEBUG_KMS("VBT: Unsupported DSC slice count for DSI\n");
2705
2706                 crtc_state->dsc.slice_count = 1;
2707         }
2708
2709         if (crtc_state->hw.adjusted_mode.crtc_hdisplay %
2710             crtc_state->dsc.slice_count != 0)
2711                 DRM_DEBUG_KMS("VBT: DSC hdisplay %d not divisible by slice count %d\n",
2712                               crtc_state->hw.adjusted_mode.crtc_hdisplay,
2713                               crtc_state->dsc.slice_count);
2714
2715         /*
2716          * The VBT rc_buffer_block_size and rc_buffer_size definitions
2717          * correspond to DP 1.4 DPCD offsets 0x62 and 0x63.
2718          */
2719         vdsc_cfg->rc_model_size = drm_dsc_dp_rc_buffer_size(dsc->rc_buffer_block_size,
2720                                                             dsc->rc_buffer_size);
2721
2722         /* FIXME: DSI spec says bpc + 1 for this one */
2723         vdsc_cfg->line_buf_depth = VBT_DSC_LINE_BUFFER_DEPTH(dsc->line_buffer_depth);
2724
2725         vdsc_cfg->block_pred_enable = dsc->block_prediction_enable;
2726
2727         vdsc_cfg->slice_height = dsc->slice_height;
2728 }
2729
2730 /* FIXME: initially DSI specific */
2731 bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
2732                                struct intel_crtc_state *crtc_state,
2733                                int dsc_max_bpc)
2734 {
2735         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2736         const struct intel_bios_encoder_data *devdata;
2737         const struct child_device_config *child;
2738
2739         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2740                 child = &devdata->child;
2741
2742                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2743                         continue;
2744
2745                 if (child->dvo_port - DVO_PORT_MIPIA == encoder->port) {
2746                         if (!devdata->dsc)
2747                                 return false;
2748
2749                         if (crtc_state)
2750                                 fill_dsc(crtc_state, devdata->dsc, dsc_max_bpc);
2751
2752                         return true;
2753                 }
2754         }
2755
2756         return false;
2757 }
2758
2759 /**
2760  * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
2761  * @i915:       i915 device instance
2762  * @port:       port to check
2763  *
2764  * Return true if HPD should be inverted for %port.
2765  */
2766 bool
2767 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
2768                                 enum port port)
2769 {
2770         const struct intel_bios_encoder_data *devdata =
2771                 i915->vbt.ddi_port_info[port].devdata;
2772
2773         if (drm_WARN_ON_ONCE(&i915->drm,
2774                              !IS_GEMINILAKE(i915) && !IS_BROXTON(i915)))
2775                 return false;
2776
2777         return devdata && devdata->child.hpd_invert;
2778 }
2779
2780 /**
2781  * intel_bios_is_lspcon_present - if LSPCON is attached on %port
2782  * @i915:       i915 device instance
2783  * @port:       port to check
2784  *
2785  * Return true if LSPCON is present on this port
2786  */
2787 bool
2788 intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
2789                              enum port port)
2790 {
2791         const struct intel_bios_encoder_data *devdata =
2792                 i915->vbt.ddi_port_info[port].devdata;
2793
2794         return HAS_LSPCON(i915) && devdata && devdata->child.lspcon;
2795 }
2796
2797 /**
2798  * intel_bios_is_lane_reversal_needed - if lane reversal needed on port
2799  * @i915:       i915 device instance
2800  * @port:       port to check
2801  *
2802  * Return true if port requires lane reversal
2803  */
2804 bool
2805 intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
2806                                    enum port port)
2807 {
2808         const struct intel_bios_encoder_data *devdata =
2809                 i915->vbt.ddi_port_info[port].devdata;
2810
2811         return devdata && devdata->child.lane_reversal;
2812 }
2813
2814 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *i915,
2815                                    enum port port)
2816 {
2817         const struct ddi_vbt_port_info *info =
2818                 &i915->vbt.ddi_port_info[port];
2819         enum aux_ch aux_ch;
2820
2821         if (!info->alternate_aux_channel) {
2822                 aux_ch = (enum aux_ch)port;
2823
2824                 drm_dbg_kms(&i915->drm,
2825                             "using AUX %c for port %c (platform default)\n",
2826                             aux_ch_name(aux_ch), port_name(port));
2827                 return aux_ch;
2828         }
2829
2830         /*
2831          * RKL/DG1 VBT uses PHY based mapping. Combo PHYs A,B,C,D
2832          * map to DDI A,B,TC1,TC2 respectively.
2833          *
2834          * ADL-S VBT uses PHY based mapping. Combo PHYs A,B,C,D,E
2835          * map to DDI A,TC1,TC2,TC3,TC4 respectively.
2836          */
2837         switch (info->alternate_aux_channel) {
2838         case DP_AUX_A:
2839                 aux_ch = AUX_CH_A;
2840                 break;
2841         case DP_AUX_B:
2842                 if (IS_ALDERLAKE_S(i915))
2843                         aux_ch = AUX_CH_USBC1;
2844                 else
2845                         aux_ch = AUX_CH_B;
2846                 break;
2847         case DP_AUX_C:
2848                 if (IS_ALDERLAKE_S(i915))
2849                         aux_ch = AUX_CH_USBC2;
2850                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2851                         aux_ch = AUX_CH_USBC1;
2852                 else
2853                         aux_ch = AUX_CH_C;
2854                 break;
2855         case DP_AUX_D:
2856                 if (IS_ALDERLAKE_S(i915))
2857                         aux_ch = AUX_CH_USBC3;
2858                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2859                         aux_ch = AUX_CH_USBC2;
2860                 else
2861                         aux_ch = AUX_CH_D;
2862                 break;
2863         case DP_AUX_E:
2864                 if (IS_ALDERLAKE_S(i915))
2865                         aux_ch = AUX_CH_USBC4;
2866                 else
2867                         aux_ch = AUX_CH_E;
2868                 break;
2869         case DP_AUX_F:
2870                 aux_ch = AUX_CH_F;
2871                 break;
2872         case DP_AUX_G:
2873                 aux_ch = AUX_CH_G;
2874                 break;
2875         case DP_AUX_H:
2876                 aux_ch = AUX_CH_H;
2877                 break;
2878         case DP_AUX_I:
2879                 aux_ch = AUX_CH_I;
2880                 break;
2881         default:
2882                 MISSING_CASE(info->alternate_aux_channel);
2883                 aux_ch = AUX_CH_A;
2884                 break;
2885         }
2886
2887         drm_dbg_kms(&i915->drm, "using AUX %c for port %c (VBT)\n",
2888                     aux_ch_name(aux_ch), port_name(port));
2889
2890         return aux_ch;
2891 }
2892
2893 int intel_bios_max_tmds_clock(struct intel_encoder *encoder)
2894 {
2895         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2896
2897         return i915->vbt.ddi_port_info[encoder->port].max_tmds_clock;
2898 }
2899
2900 int intel_bios_hdmi_level_shift(struct intel_encoder *encoder)
2901 {
2902         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2903         const struct ddi_vbt_port_info *info =
2904                 &i915->vbt.ddi_port_info[encoder->port];
2905
2906         return info->hdmi_level_shift_set ? info->hdmi_level_shift : -1;
2907 }
2908
2909 int intel_bios_encoder_dp_boost_level(const struct intel_bios_encoder_data *devdata)
2910 {
2911         if (!devdata || devdata->i915->vbt.version < 196 || !devdata->child.iboost)
2912                 return 0;
2913
2914         return translate_iboost(devdata->child.dp_iboost_level);
2915 }
2916
2917 int intel_bios_encoder_hdmi_boost_level(const struct intel_bios_encoder_data *devdata)
2918 {
2919         if (!devdata || devdata->i915->vbt.version < 196 || !devdata->child.iboost)
2920                 return 0;
2921
2922         return translate_iboost(devdata->child.hdmi_iboost_level);
2923 }
2924
2925 int intel_bios_dp_max_link_rate(struct intel_encoder *encoder)
2926 {
2927         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2928
2929         return i915->vbt.ddi_port_info[encoder->port].dp_max_link_rate;
2930 }
2931
2932 int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
2933 {
2934         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2935
2936         return i915->vbt.ddi_port_info[encoder->port].alternate_ddc_pin;
2937 }
2938
2939 bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)
2940 {
2941         return devdata->i915->vbt.version >= 195 && devdata->child.dp_usb_type_c;
2942 }
2943
2944 bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devdata)
2945 {
2946         return devdata->i915->vbt.version >= 209 && devdata->child.tbt;
2947 }
2948
2949 const struct intel_bios_encoder_data *
2950 intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
2951 {
2952         return i915->vbt.ddi_port_info[port].devdata;
2953 }