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                 size_t exp_size;
 456
 457                 if (bdb->version >= 236)
 458                         exp_size = sizeof(struct bdb_lfp_backlight_data);
 459                 else if (bdb->version >= 234)
 460                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_234;
 461                 else
 462                         exp_size = EXP_BDB_LFP_BL_DATA_SIZE_REV_191;
 463
 464                 if (get_blocksize(backlight_data) >= exp_size) {
 465                         const struct lfp_backlight_control_method *method;
 466
 467                         method = &backlight_data->backlight_control[panel_type];
 468                         i915->vbt.backlight.type = method->type;
 469                         i915->vbt.backlight.controller = method->controller;
 470                 }
 471         }
 472
 473         i915->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
 474         i915->vbt.backlight.active_low_pwm = entry->active_low_pwm;
 475
 476         if (bdb->version >= 234) {
 477                 u16 min_level;
 478                 bool scale;
 479
 480                 level = backlight_data->brightness_level[panel_type].level;
 481                 min_level = backlight_data->brightness_min_level[panel_type].level;
 482
 483                 if (bdb->version >= 236)
 484                         scale = backlight_data->brightness_precision_bits[panel_type] == 16;
 485                 else
 486                         scale = level > 255;
 487
 488                 if (scale)
 489                         min_level = min_level / 255;
 490
 491                 if (min_level > 255) {
 492                         drm_warn(&i915->drm, "Brightness min level > 255\n");
 493                         level = 255;
 494                 }
 495                 i915->vbt.backlight.min_brightness = min_level;
 496         } else {
 497                 level = backlight_data->level[panel_type];
 498                 i915->vbt.backlight.min_brightness = entry->min_brightness;
 499         }
 500
 501         drm_dbg_kms(&i915->drm,
 502                     "VBT backlight PWM modulation frequency %u Hz, "
 503                     "active %s, min brightness %u, level %u, controller %u\n",
 504                     i915->vbt.backlight.pwm_freq_hz,
 505                     i915->vbt.backlight.active_low_pwm ? "low" : "high",
 506                     i915->vbt.backlight.min_brightness,
 507                     level,
 508                     i915->vbt.backlight.controller);
 509 }
 510
 511 /* Try to find sdvo panel data */
 512 static void
 513 parse_sdvo_panel_data(struct drm_i915_private *i915,
 514                       const struct bdb_header *bdb)
 515 {
 516         const struct bdb_sdvo_panel_dtds *dtds;
 517         struct drm_display_mode *panel_fixed_mode;
 518         int index;
 519
 520         index = i915->params.vbt_sdvo_panel_type;
 521         if (index == -2) {
 522                 drm_dbg_kms(&i915->drm,
 523                             "Ignore SDVO panel mode from BIOS VBT tables.\n");
 524                 return;
 525         }
 526
 527         if (index == -1) {
 528                 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
 529
 530                 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
 531                 if (!sdvo_lvds_options)
 532                         return;
 533
 534                 index = sdvo_lvds_options->panel_type;
 535         }
 536
 537         dtds = find_section(bdb, BDB_SDVO_PANEL_DTDS);
 538         if (!dtds)
 539                 return;
 540
 541         panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
 542         if (!panel_fixed_mode)
 543                 return;
 544
 545         fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]);
 546
 547         i915->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
 548
 549         drm_dbg_kms(&i915->drm,
 550                     "Found SDVO panel mode in BIOS VBT tables:\n");
 551         drm_mode_debug_printmodeline(panel_fixed_mode);
 552 }
 553
 554 static int intel_bios_ssc_frequency(struct drm_i915_private *i915,
 555                                     bool alternate)
 556 {
 557         switch (DISPLAY_VER(i915)) {
 558         case 2:
 559                 return alternate ? 66667 : 48000;
 560         case 3:
 561         case 4:
 562                 return alternate ? 100000 : 96000;
 563         default:
 564                 return alternate ? 100000 : 120000;
 565         }
 566 }
 567
 568 static void
 569 parse_general_features(struct drm_i915_private *i915,
 570                        const struct bdb_header *bdb)
 571 {
 572         const struct bdb_general_features *general;
 573
 574         general = find_section(bdb, BDB_GENERAL_FEATURES);
 575         if (!general)
 576                 return;
 577
 578         i915->vbt.int_tv_support = general->int_tv_support;
 579         /* int_crt_support can't be trusted on earlier platforms */
 580         if (bdb->version >= 155 &&
 581             (HAS_DDI(i915) || IS_VALLEYVIEW(i915)))
 582                 i915->vbt.int_crt_support = general->int_crt_support;
 583         i915->vbt.lvds_use_ssc = general->enable_ssc;
 584         i915->vbt.lvds_ssc_freq =
 585                 intel_bios_ssc_frequency(i915, general->ssc_freq);
 586         i915->vbt.display_clock_mode = general->display_clock_mode;
 587         i915->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
 588         if (bdb->version >= 181) {
 589                 i915->vbt.orientation = general->rotate_180 ?
 590                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
 591                         DRM_MODE_PANEL_ORIENTATION_NORMAL;
 592         } else {
 593                 i915->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
 594         }
 595         drm_dbg_kms(&i915->drm,
 596                     "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",
 597                     i915->vbt.int_tv_support,
 598                     i915->vbt.int_crt_support,
 599                     i915->vbt.lvds_use_ssc,
 600                     i915->vbt.lvds_ssc_freq,
 601                     i915->vbt.display_clock_mode,
 602                     i915->vbt.fdi_rx_polarity_inverted);
 603 }
 604
 605 static const struct child_device_config *
 606 child_device_ptr(const struct bdb_general_definitions *defs, int i)
 607 {
 608         return (const void *) &defs->devices[i * defs->child_dev_size];
 609 }
 610
 611 static void
 612 parse_sdvo_device_mapping(struct drm_i915_private *i915)
 613 {
 614         struct sdvo_device_mapping *mapping;
 615         const struct intel_bios_encoder_data *devdata;
 616         const struct child_device_config *child;
 617         int count = 0;
 618
 619         /*
 620          * Only parse SDVO mappings on gens that could have SDVO. This isn't
 621          * accurate and doesn't have to be, as long as it's not too strict.
 622          */
 623         if (!IS_DISPLAY_VER(i915, 3, 7)) {
 624                 drm_dbg_kms(&i915->drm, "Skipping SDVO device mapping\n");
 625                 return;
 626         }
 627
 628         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
 629                 child = &devdata->child;
 630
 631                 if (child->slave_addr != SLAVE_ADDR1 &&
 632                     child->slave_addr != SLAVE_ADDR2) {
 633                         /*
 634                          * If the slave address is neither 0x70 nor 0x72,
 635                          * it is not a SDVO device. Skip it.
 636                          */
 637                         continue;
 638                 }
 639                 if (child->dvo_port != DEVICE_PORT_DVOB &&
 640                     child->dvo_port != DEVICE_PORT_DVOC) {
 641                         /* skip the incorrect SDVO port */
 642                         drm_dbg_kms(&i915->drm,
 643                                     "Incorrect SDVO port. Skip it\n");
 644                         continue;
 645                 }
 646                 drm_dbg_kms(&i915->drm,
 647                             "the SDVO device with slave addr %2x is found on"
 648                             " %s port\n",
 649                             child->slave_addr,
 650                             (child->dvo_port == DEVICE_PORT_DVOB) ?
 651                             "SDVOB" : "SDVOC");
 652                 mapping = &i915->vbt.sdvo_mappings[child->dvo_port - 1];
 653                 if (!mapping->initialized) {
 654                         mapping->dvo_port = child->dvo_port;
 655                         mapping->slave_addr = child->slave_addr;
 656                         mapping->dvo_wiring = child->dvo_wiring;
 657                         mapping->ddc_pin = child->ddc_pin;
 658                         mapping->i2c_pin = child->i2c_pin;
 659                         mapping->initialized = 1;
 660                         drm_dbg_kms(&i915->drm,
 661                                     "SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
 662                                     mapping->dvo_port, mapping->slave_addr,
 663                                     mapping->dvo_wiring, mapping->ddc_pin,
 664                                     mapping->i2c_pin);
 665                 } else {
 666                         drm_dbg_kms(&i915->drm,
 667                                     "Maybe one SDVO port is shared by "
 668                                     "two SDVO device.\n");
 669                 }
 670                 if (child->slave2_addr) {
 671                         /* Maybe this is a SDVO device with multiple inputs */
 672                         /* And the mapping info is not added */
 673                         drm_dbg_kms(&i915->drm,
 674                                     "there exists the slave2_addr. Maybe this"
 675                                     " is a SDVO device with multiple inputs.\n");
 676                 }
 677                 count++;
 678         }
 679
 680         if (!count) {
 681                 /* No SDVO device info is found */
 682                 drm_dbg_kms(&i915->drm,
 683                             "No SDVO device info is found in VBT\n");
 684         }
 685 }
 686
 687 static void
 688 parse_driver_features(struct drm_i915_private *i915,
 689                       const struct bdb_header *bdb)
 690 {
 691         const struct bdb_driver_features *driver;
 692
 693         driver = find_section(bdb, BDB_DRIVER_FEATURES);
 694         if (!driver)
 695                 return;
 696
 697         if (DISPLAY_VER(i915) >= 5) {
 698                 /*
 699                  * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
 700                  * to mean "eDP". The VBT spec doesn't agree with that
 701                  * interpretation, but real world VBTs seem to.
 702                  */
 703                 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
 704                         i915->vbt.int_lvds_support = 0;
 705         } else {
 706                 /*
 707                  * FIXME it's not clear which BDB version has the LVDS config
 708                  * bits defined. Revision history in the VBT spec says:
 709                  * "0.92 | Add two definitions for VBT value of LVDS Active
 710                  *  Config (00b and 11b values defined) | 06/13/2005"
 711                  * but does not the specify the BDB version.
 712                  *
 713                  * So far version 134 (on i945gm) is the oldest VBT observed
 714                  * in the wild with the bits correctly populated. Version
 715                  * 108 (on i85x) does not have the bits correctly populated.
 716                  */
 717                 if (bdb->version >= 134 &&
 718                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
 719                     driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
 720                         i915->vbt.int_lvds_support = 0;
 721         }
 722
 723         if (bdb->version < 228) {
 724                 drm_dbg_kms(&i915->drm, "DRRS State Enabled:%d\n",
 725                             driver->drrs_enabled);
 726                 /*
 727                  * If DRRS is not supported, drrs_type has to be set to 0.
 728                  * This is because, VBT is configured in such a way that
 729                  * static DRRS is 0 and DRRS not supported is represented by
 730                  * driver->drrs_enabled=false
 731                  */
 732                 if (!driver->drrs_enabled)
 733                         i915->vbt.drrs_type = DRRS_NOT_SUPPORTED;
 734
 735                 i915->vbt.psr.enable = driver->psr_enabled;
 736         }
 737 }
 738
 739 static void
 740 parse_power_conservation_features(struct drm_i915_private *i915,
 741                                   const struct bdb_header *bdb)
 742 {
 743         const struct bdb_lfp_power *power;
 744         u8 panel_type = i915->vbt.panel_type;
 745
 746         if (bdb->version < 228)
 747                 return;
 748
 749         power = find_section(bdb, BDB_LFP_POWER);
 750         if (!power)
 751                 return;
 752
 753         i915->vbt.psr.enable = power->psr & BIT(panel_type);
 754
 755         /*
 756          * If DRRS is not supported, drrs_type has to be set to 0.
 757          * This is because, VBT is configured in such a way that
 758          * static DRRS is 0 and DRRS not supported is represented by
 759          * power->drrs & BIT(panel_type)=false
 760          */
 761         if (!(power->drrs & BIT(panel_type)))
 762                 i915->vbt.drrs_type = DRRS_NOT_SUPPORTED;
 763
 764         if (bdb->version >= 232)
 765                 i915->vbt.edp.hobl = power->hobl & BIT(panel_type);
 766 }
 767
 768 static void
 769 parse_edp(struct drm_i915_private *i915, const struct bdb_header *bdb)
 770 {
 771         const struct bdb_edp *edp;
 772         const struct edp_power_seq *edp_pps;
 773         const struct edp_fast_link_params *edp_link_params;
 774         int panel_type = i915->vbt.panel_type;
 775
 776         edp = find_section(bdb, BDB_EDP);
 777         if (!edp)
 778                 return;
 779
 780         switch ((edp->color_depth >> (panel_type * 2)) & 3) {
 781         case EDP_18BPP:
 782                 i915->vbt.edp.bpp = 18;
 783                 break;
 784         case EDP_24BPP:
 785                 i915->vbt.edp.bpp = 24;
 786                 break;
 787         case EDP_30BPP:
 788                 i915->vbt.edp.bpp = 30;
 789                 break;
 790         }
 791
 792         /* Get the eDP sequencing and link info */
 793         edp_pps = &edp->power_seqs[panel_type];
 794         edp_link_params = &edp->fast_link_params[panel_type];
 795
 796         i915->vbt.edp.pps = *edp_pps;
 797
 798         switch (edp_link_params->rate) {
 799         case EDP_RATE_1_62:
 800                 i915->vbt.edp.rate = DP_LINK_BW_1_62;
 801                 break;
 802         case EDP_RATE_2_7:
 803                 i915->vbt.edp.rate = DP_LINK_BW_2_7;
 804                 break;
 805         default:
 806                 drm_dbg_kms(&i915->drm,
 807                             "VBT has unknown eDP link rate value %u\n",
 808                              edp_link_params->rate);
 809                 break;
 810         }
 811
 812         switch (edp_link_params->lanes) {
 813         case EDP_LANE_1:
 814                 i915->vbt.edp.lanes = 1;
 815                 break;
 816         case EDP_LANE_2:
 817                 i915->vbt.edp.lanes = 2;
 818                 break;
 819         case EDP_LANE_4:
 820                 i915->vbt.edp.lanes = 4;
 821                 break;
 822         default:
 823                 drm_dbg_kms(&i915->drm,
 824                             "VBT has unknown eDP lane count value %u\n",
 825                             edp_link_params->lanes);
 826                 break;
 827         }
 828
 829         switch (edp_link_params->preemphasis) {
 830         case EDP_PREEMPHASIS_NONE:
 831                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
 832                 break;
 833         case EDP_PREEMPHASIS_3_5dB:
 834                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
 835                 break;
 836         case EDP_PREEMPHASIS_6dB:
 837                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
 838                 break;
 839         case EDP_PREEMPHASIS_9_5dB:
 840                 i915->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
 841                 break;
 842         default:
 843                 drm_dbg_kms(&i915->drm,
 844                             "VBT has unknown eDP pre-emphasis value %u\n",
 845                             edp_link_params->preemphasis);
 846                 break;
 847         }
 848
 849         switch (edp_link_params->vswing) {
 850         case EDP_VSWING_0_4V:
 851                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
 852                 break;
 853         case EDP_VSWING_0_6V:
 854                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
 855                 break;
 856         case EDP_VSWING_0_8V:
 857                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
 858                 break;
 859         case EDP_VSWING_1_2V:
 860                 i915->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
 861                 break;
 862         default:
 863                 drm_dbg_kms(&i915->drm,
 864                             "VBT has unknown eDP voltage swing value %u\n",
 865                             edp_link_params->vswing);
 866                 break;
 867         }
 868
 869         if (bdb->version >= 173) {
 870                 u8 vswing;
 871
 872                 /* Don't read from VBT if module parameter has valid value*/
 873                 if (i915->params.edp_vswing) {
 874                         i915->vbt.edp.low_vswing =
 875                                 i915->params.edp_vswing == 1;
 876                 } else {
 877                         vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
 878                         i915->vbt.edp.low_vswing = vswing == 0;
 879                 }
 880         }
 881 }
 882
 883 static void
 884 parse_psr(struct drm_i915_private *i915, const struct bdb_header *bdb)
 885 {
 886         const struct bdb_psr *psr;
 887         const struct psr_table *psr_table;
 888         int panel_type = i915->vbt.panel_type;
 889
 890         psr = find_section(bdb, BDB_PSR);
 891         if (!psr) {
 892                 drm_dbg_kms(&i915->drm, "No PSR BDB found.\n");
 893                 return;
 894         }
 895
 896         psr_table = &psr->psr_table[panel_type];
 897
 898         i915->vbt.psr.full_link = psr_table->full_link;
 899         i915->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
 900
 901         /* Allowed VBT values goes from 0 to 15 */
 902         i915->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
 903                 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
 904
 905         switch (psr_table->lines_to_wait) {
 906         case 0:
 907                 i915->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
 908                 break;
 909         case 1:
 910                 i915->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
 911                 break;
 912         case 2:
 913                 i915->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
 914                 break;
 915         case 3:
 916                 i915->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
 917                 break;
 918         default:
 919                 drm_dbg_kms(&i915->drm,
 920                             "VBT has unknown PSR lines to wait %u\n",
 921                             psr_table->lines_to_wait);
 922                 break;
 923         }
 924
 925         /*
 926          * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
 927          * Old decimal value is wake up time in multiples of 100 us.
 928          */
 929         if (bdb->version >= 205 &&
 930             (DISPLAY_VER(i915) >= 9 && !IS_BROXTON(i915))) {
 931                 switch (psr_table->tp1_wakeup_time) {
 932                 case 0:
 933                         i915->vbt.psr.tp1_wakeup_time_us = 500;
 934                         break;
 935                 case 1:
 936                         i915->vbt.psr.tp1_wakeup_time_us = 100;
 937                         break;
 938                 case 3:
 939                         i915->vbt.psr.tp1_wakeup_time_us = 0;
 940                         break;
 941                 default:
 942                         drm_dbg_kms(&i915->drm,
 943                                     "VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 944                                     psr_table->tp1_wakeup_time);
 945                         fallthrough;
 946                 case 2:
 947                         i915->vbt.psr.tp1_wakeup_time_us = 2500;
 948                         break;
 949                 }
 950
 951                 switch (psr_table->tp2_tp3_wakeup_time) {
 952                 case 0:
 953                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 500;
 954                         break;
 955                 case 1:
 956                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 100;
 957                         break;
 958                 case 3:
 959                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 0;
 960                         break;
 961                 default:
 962                         drm_dbg_kms(&i915->drm,
 963                                     "VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 964                                     psr_table->tp2_tp3_wakeup_time);
 965                         fallthrough;
 966                 case 2:
 967                         i915->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
 968                 break;
 969                 }
 970         } else {
 971                 i915->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
 972                 i915->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
 973         }
 974
 975         if (bdb->version >= 226) {
 976                 u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time;
 977
 978                 wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3;
 979                 switch (wakeup_time) {
 980                 case 0:
 981                         wakeup_time = 500;
 982                         break;
 983                 case 1:
 984                         wakeup_time = 100;
 985                         break;
 986                 case 3:
 987                         wakeup_time = 50;
 988                         break;
 989                 default:
 990                 case 2:
 991                         wakeup_time = 2500;
 992                         break;
 993                 }
 994                 i915->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time;
 995         } else {
 996                 /* Reusing PSR1 wakeup time for PSR2 in older VBTs */
 997                 i915->vbt.psr.psr2_tp2_tp3_wakeup_time_us = i915->vbt.psr.tp2_tp3_wakeup_time_us;
 998         }
 999 }
1000
1001 static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
1002                                       u16 version, enum port port)
1003 {
1004         if (!i915->vbt.dsi.config->dual_link || version < 197) {
1005                 i915->vbt.dsi.bl_ports = BIT(port);
1006                 if (i915->vbt.dsi.config->cabc_supported)
1007                         i915->vbt.dsi.cabc_ports = BIT(port);
1008
1009                 return;
1010         }
1011
1012         switch (i915->vbt.dsi.config->dl_dcs_backlight_ports) {
1013         case DL_DCS_PORT_A:
1014                 i915->vbt.dsi.bl_ports = BIT(PORT_A);
1015                 break;
1016         case DL_DCS_PORT_C:
1017                 i915->vbt.dsi.bl_ports = BIT(PORT_C);
1018                 break;
1019         default:
1020         case DL_DCS_PORT_A_AND_C:
1021                 i915->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
1022                 break;
1023         }
1024
1025         if (!i915->vbt.dsi.config->cabc_supported)
1026                 return;
1027
1028         switch (i915->vbt.dsi.config->dl_dcs_cabc_ports) {
1029         case DL_DCS_PORT_A:
1030                 i915->vbt.dsi.cabc_ports = BIT(PORT_A);
1031                 break;
1032         case DL_DCS_PORT_C:
1033                 i915->vbt.dsi.cabc_ports = BIT(PORT_C);
1034                 break;
1035         default:
1036         case DL_DCS_PORT_A_AND_C:
1037                 i915->vbt.dsi.cabc_ports =
1038                                         BIT(PORT_A) | BIT(PORT_C);
1039                 break;
1040         }
1041 }
1042
1043 static void
1044 parse_mipi_config(struct drm_i915_private *i915,
1045                   const struct bdb_header *bdb)
1046 {
1047         const struct bdb_mipi_config *start;
1048         const struct mipi_config *config;
1049         const struct mipi_pps_data *pps;
1050         int panel_type = i915->vbt.panel_type;
1051         enum port port;
1052
1053         /* parse MIPI blocks only if LFP type is MIPI */
1054         if (!intel_bios_is_dsi_present(i915, &port))
1055                 return;
1056
1057         /* Initialize this to undefined indicating no generic MIPI support */
1058         i915->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
1059
1060         /* Block #40 is already parsed and panel_fixed_mode is
1061          * stored in i915->lfp_lvds_vbt_mode
1062          * resuse this when needed
1063          */
1064
1065         /* Parse #52 for panel index used from panel_type already
1066          * parsed
1067          */
1068         start = find_section(bdb, BDB_MIPI_CONFIG);
1069         if (!start) {
1070                 drm_dbg_kms(&i915->drm, "No MIPI config BDB found");
1071                 return;
1072         }
1073
1074         drm_dbg(&i915->drm, "Found MIPI Config block, panel index = %d\n",
1075                 panel_type);
1076
1077         /*
1078          * get hold of the correct configuration block and pps data as per
1079          * the panel_type as index
1080          */
1081         config = &start->config[panel_type];
1082         pps = &start->pps[panel_type];
1083
1084         /* store as of now full data. Trim when we realise all is not needed */
1085         i915->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
1086         if (!i915->vbt.dsi.config)
1087                 return;
1088
1089         i915->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
1090         if (!i915->vbt.dsi.pps) {
1091                 kfree(i915->vbt.dsi.config);
1092                 return;
1093         }
1094
1095         parse_dsi_backlight_ports(i915, bdb->version, port);
1096
1097         /* FIXME is the 90 vs. 270 correct? */
1098         switch (config->rotation) {
1099         case ENABLE_ROTATION_0:
1100                 /*
1101                  * Most (all?) VBTs claim 0 degrees despite having
1102                  * an upside down panel, thus we do not trust this.
1103                  */
1104                 i915->vbt.dsi.orientation =
1105                         DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
1106                 break;
1107         case ENABLE_ROTATION_90:
1108                 i915->vbt.dsi.orientation =
1109                         DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
1110                 break;
1111         case ENABLE_ROTATION_180:
1112                 i915->vbt.dsi.orientation =
1113                         DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
1114                 break;
1115         case ENABLE_ROTATION_270:
1116                 i915->vbt.dsi.orientation =
1117                         DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
1118                 break;
1119         }
1120
1121         /* We have mandatory mipi config blocks. Initialize as generic panel */
1122         i915->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
1123 }
1124
1125 /* Find the sequence block and size for the given panel. */
1126 static const u8 *
1127 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
1128                           u16 panel_id, u32 *seq_size)
1129 {
1130         u32 total = get_blocksize(sequence);
1131         const u8 *data = &sequence->data[0];
1132         u8 current_id;
1133         u32 current_size;
1134         int header_size = sequence->version >= 3 ? 5 : 3;
1135         int index = 0;
1136         int i;
1137
1138         /* skip new block size */
1139         if (sequence->version >= 3)
1140                 data += 4;
1141
1142         for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
1143                 if (index + header_size > total) {
1144                         DRM_ERROR("Invalid sequence block (header)\n");
1145                         return NULL;
1146                 }
1147
1148                 current_id = *(data + index);
1149                 if (sequence->version >= 3)
1150                         current_size = *((const u32 *)(data + index + 1));
1151                 else
1152                         current_size = *((const u16 *)(data + index + 1));
1153
1154                 index += header_size;
1155
1156                 if (index + current_size > total) {
1157                         DRM_ERROR("Invalid sequence block\n");
1158                         return NULL;
1159                 }
1160
1161                 if (current_id == panel_id) {
1162                         *seq_size = current_size;
1163                         return data + index;
1164                 }
1165
1166                 index += current_size;
1167         }
1168
1169         DRM_ERROR("Sequence block detected but no valid configuration\n");
1170
1171         return NULL;
1172 }
1173
1174 static int goto_next_sequence(const u8 *data, int index, int total)
1175 {
1176         u16 len;
1177
1178         /* Skip Sequence Byte. */
1179         for (index = index + 1; index < total; index += len) {
1180                 u8 operation_byte = *(data + index);
1181                 index++;
1182
1183                 switch (operation_byte) {
1184                 case MIPI_SEQ_ELEM_END:
1185                         return index;
1186                 case MIPI_SEQ_ELEM_SEND_PKT:
1187                         if (index + 4 > total)
1188                                 return 0;
1189
1190                         len = *((const u16 *)(data + index + 2)) + 4;
1191                         break;
1192                 case MIPI_SEQ_ELEM_DELAY:
1193                         len = 4;
1194                         break;
1195                 case MIPI_SEQ_ELEM_GPIO:
1196                         len = 2;
1197                         break;
1198                 case MIPI_SEQ_ELEM_I2C:
1199                         if (index + 7 > total)
1200                                 return 0;
1201                         len = *(data + index + 6) + 7;
1202                         break;
1203                 default:
1204                         DRM_ERROR("Unknown operation byte\n");
1205                         return 0;
1206                 }
1207         }
1208
1209         return 0;
1210 }
1211
1212 static int goto_next_sequence_v3(const u8 *data, int index, int total)
1213 {
1214         int seq_end;
1215         u16 len;
1216         u32 size_of_sequence;
1217
1218         /*
1219          * Could skip sequence based on Size of Sequence alone, but also do some
1220          * checking on the structure.
1221          */
1222         if (total < 5) {
1223                 DRM_ERROR("Too small sequence size\n");
1224                 return 0;
1225         }
1226
1227         /* Skip Sequence Byte. */
1228         index++;
1229
1230         /*
1231          * Size of Sequence. Excludes the Sequence Byte and the size itself,
1232          * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
1233          * byte.
1234          */
1235         size_of_sequence = *((const u32 *)(data + index));
1236         index += 4;
1237
1238         seq_end = index + size_of_sequence;
1239         if (seq_end > total) {
1240                 DRM_ERROR("Invalid sequence size\n");
1241                 return 0;
1242         }
1243
1244         for (; index < total; index += len) {
1245                 u8 operation_byte = *(data + index);
1246                 index++;
1247
1248                 if (operation_byte == MIPI_SEQ_ELEM_END) {
1249                         if (index != seq_end) {
1250                                 DRM_ERROR("Invalid element structure\n");
1251                                 return 0;
1252                         }
1253                         return index;
1254                 }
1255
1256                 len = *(data + index);
1257                 index++;
1258
1259                 /*
1260                  * FIXME: Would be nice to check elements like for v1/v2 in
1261                  * goto_next_sequence() above.
1262                  */
1263                 switch (operation_byte) {
1264                 case MIPI_SEQ_ELEM_SEND_PKT:
1265                 case MIPI_SEQ_ELEM_DELAY:
1266                 case MIPI_SEQ_ELEM_GPIO:
1267                 case MIPI_SEQ_ELEM_I2C:
1268                 case MIPI_SEQ_ELEM_SPI:
1269                 case MIPI_SEQ_ELEM_PMIC:
1270                         break;
1271                 default:
1272                         DRM_ERROR("Unknown operation byte %u\n",
1273                                   operation_byte);
1274                         break;
1275                 }
1276         }
1277
1278         return 0;
1279 }
1280
1281 /*
1282  * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
1283  * skip all delay + gpio operands and stop at the first DSI packet op.
1284  */
1285 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *i915)
1286 {
1287         const u8 *data = i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1288         int index, len;
1289
1290         if (drm_WARN_ON(&i915->drm,
1291                         !data || i915->vbt.dsi.seq_version != 1))
1292                 return 0;
1293
1294         /* index = 1 to skip sequence byte */
1295         for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
1296                 switch (data[index]) {
1297                 case MIPI_SEQ_ELEM_SEND_PKT:
1298                         return index == 1 ? 0 : index;
1299                 case MIPI_SEQ_ELEM_DELAY:
1300                         len = 5; /* 1 byte for operand + uint32 */
1301                         break;
1302                 case MIPI_SEQ_ELEM_GPIO:
1303                         len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
1304                         break;
1305                 default:
1306                         return 0;
1307                 }
1308         }
1309
1310         return 0;
1311 }
1312
1313 /*
1314  * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
1315  * The deassert must be done before calling intel_dsi_device_ready, so for
1316  * these devices we split the init OTP sequence into a deassert sequence and
1317  * the actual init OTP part.
1318  */
1319 static void fixup_mipi_sequences(struct drm_i915_private *i915)
1320 {
1321         u8 *init_otp;
1322         int len;
1323
1324         /* Limit this to VLV for now. */
1325         if (!IS_VALLEYVIEW(i915))
1326                 return;
1327
1328         /* Limit this to v1 vid-mode sequences */
1329         if (i915->vbt.dsi.config->is_cmd_mode ||
1330             i915->vbt.dsi.seq_version != 1)
1331                 return;
1332
1333         /* Only do this if there are otp and assert seqs and no deassert seq */
1334         if (!i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1335             !i915->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1336             i915->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1337                 return;
1338
1339         /* The deassert-sequence ends at the first DSI packet */
1340         len = get_init_otp_deassert_fragment_len(i915);
1341         if (!len)
1342                 return;
1343
1344         drm_dbg_kms(&i915->drm,
1345                     "Using init OTP fragment to deassert reset\n");
1346
1347         /* Copy the fragment, update seq byte and terminate it */
1348         init_otp = (u8 *)i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1349         i915->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1350         if (!i915->vbt.dsi.deassert_seq)
1351                 return;
1352         i915->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1353         i915->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1354         /* Use the copy for deassert */
1355         i915->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1356                 i915->vbt.dsi.deassert_seq;
1357         /* Replace the last byte of the fragment with init OTP seq byte */
1358         init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1359         /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1360         i915->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1361 }
1362
1363 static void
1364 parse_mipi_sequence(struct drm_i915_private *i915,
1365                     const struct bdb_header *bdb)
1366 {
1367         int panel_type = i915->vbt.panel_type;
1368         const struct bdb_mipi_sequence *sequence;
1369         const u8 *seq_data;
1370         u32 seq_size;
1371         u8 *data;
1372         int index = 0;
1373
1374         /* Only our generic panel driver uses the sequence block. */
1375         if (i915->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
1376                 return;
1377
1378         sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
1379         if (!sequence) {
1380                 drm_dbg_kms(&i915->drm,
1381                             "No MIPI Sequence found, parsing complete\n");
1382                 return;
1383         }
1384
1385         /* Fail gracefully for forward incompatible sequence block. */
1386         if (sequence->version >= 4) {
1387                 drm_err(&i915->drm,
1388                         "Unable to parse MIPI Sequence Block v%u\n",
1389                         sequence->version);
1390                 return;
1391         }
1392
1393         drm_dbg(&i915->drm, "Found MIPI sequence block v%u\n",
1394                 sequence->version);
1395
1396         seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
1397         if (!seq_data)
1398                 return;
1399
1400         data = kmemdup(seq_data, seq_size, GFP_KERNEL);
1401         if (!data)
1402                 return;
1403
1404         /* Parse the sequences, store pointers to each sequence. */
1405         for (;;) {
1406                 u8 seq_id = *(data + index);
1407                 if (seq_id == MIPI_SEQ_END)
1408                         break;
1409
1410                 if (seq_id >= MIPI_SEQ_MAX) {
1411                         drm_err(&i915->drm, "Unknown sequence %u\n",
1412                                 seq_id);
1413                         goto err;
1414                 }
1415
1416                 /* Log about presence of sequences we won't run. */
1417                 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1418                         drm_dbg_kms(&i915->drm,
1419                                     "Unsupported sequence %u\n", seq_id);
1420
1421                 i915->vbt.dsi.sequence[seq_id] = data + index;
1422
1423                 if (sequence->version >= 3)
1424                         index = goto_next_sequence_v3(data, index, seq_size);
1425                 else
1426                         index = goto_next_sequence(data, index, seq_size);
1427                 if (!index) {
1428                         drm_err(&i915->drm, "Invalid sequence %u\n",
1429                                 seq_id);
1430                         goto err;
1431                 }
1432         }
1433
1434         i915->vbt.dsi.data = data;
1435         i915->vbt.dsi.size = seq_size;
1436         i915->vbt.dsi.seq_version = sequence->version;
1437
1438         fixup_mipi_sequences(i915);
1439
1440         drm_dbg(&i915->drm, "MIPI related VBT parsing complete\n");
1441         return;
1442
1443 err:
1444         kfree(data);
1445         memset(i915->vbt.dsi.sequence, 0, sizeof(i915->vbt.dsi.sequence));
1446 }
1447
1448 static void
1449 parse_compression_parameters(struct drm_i915_private *i915,
1450                              const struct bdb_header *bdb)
1451 {
1452         const struct bdb_compression_parameters *params;
1453         struct intel_bios_encoder_data *devdata;
1454         const struct child_device_config *child;
1455         u16 block_size;
1456         int index;
1457
1458         if (bdb->version < 198)
1459                 return;
1460
1461         params = find_section(bdb, BDB_COMPRESSION_PARAMETERS);
1462         if (params) {
1463                 /* Sanity checks */
1464                 if (params->entry_size != sizeof(params->data[0])) {
1465                         drm_dbg_kms(&i915->drm,
1466                                     "VBT: unsupported compression param entry size\n");
1467                         return;
1468                 }
1469
1470                 block_size = get_blocksize(params);
1471                 if (block_size < sizeof(*params)) {
1472                         drm_dbg_kms(&i915->drm,
1473                                     "VBT: expected 16 compression param entries\n");
1474                         return;
1475                 }
1476         }
1477
1478         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
1479                 child = &devdata->child;
1480
1481                 if (!child->compression_enable)
1482                         continue;
1483
1484                 if (!params) {
1485                         drm_dbg_kms(&i915->drm,
1486                                     "VBT: compression params not available\n");
1487                         continue;
1488                 }
1489
1490                 if (child->compression_method_cps) {
1491                         drm_dbg_kms(&i915->drm,
1492                                     "VBT: CPS compression not supported\n");
1493                         continue;
1494                 }
1495
1496                 index = child->compression_structure_index;
1497
1498                 devdata->dsc = kmemdup(&params->data[index],
1499                                        sizeof(*devdata->dsc), GFP_KERNEL);
1500         }
1501 }
1502
1503 static u8 translate_iboost(u8 val)
1504 {
1505         static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1506
1507         if (val >= ARRAY_SIZE(mapping)) {
1508                 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1509                 return 0;
1510         }
1511         return mapping[val];
1512 }
1513
1514 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
1515 {
1516         const struct ddi_vbt_port_info *info;
1517         enum port port;
1518
1519         if (!ddc_pin)
1520                 return PORT_NONE;
1521
1522         for_each_port(port) {
1523                 info = &i915->vbt.ddi_port_info[port];
1524
1525                 if (info->devdata && ddc_pin == info->alternate_ddc_pin)
1526                         return port;
1527         }
1528
1529         return PORT_NONE;
1530 }
1531
1532 static void sanitize_ddc_pin(struct drm_i915_private *i915,
1533                              enum port port)
1534 {
1535         struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
1536         struct child_device_config *child;
1537         enum port p;
1538
1539         p = get_port_by_ddc_pin(i915, info->alternate_ddc_pin);
1540         if (p == PORT_NONE)
1541                 return;
1542
1543         drm_dbg_kms(&i915->drm,
1544                     "port %c trying to use the same DDC pin (0x%x) as port %c, "
1545                     "disabling port %c DVI/HDMI support\n",
1546                     port_name(port), info->alternate_ddc_pin,
1547                     port_name(p), port_name(p));
1548
1549         /*
1550          * If we have multiple ports supposedly sharing the pin, then dvi/hdmi
1551          * couldn't exist on the shared port. Otherwise they share the same ddc
1552          * pin and system couldn't communicate with them separately.
1553          *
1554          * Give inverse child device order the priority, last one wins. Yes,
1555          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
1556          * port A and port E with the same AUX ch and we must pick port E :(
1557          */
1558         info = &i915->vbt.ddi_port_info[p];
1559         child = &info->devdata->child;
1560
1561         child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
1562         child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
1563
1564         info->alternate_ddc_pin = 0;
1565 }
1566
1567 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
1568 {
1569         const struct ddi_vbt_port_info *info;
1570         enum port port;
1571
1572         if (!aux_ch)
1573                 return PORT_NONE;
1574
1575         for_each_port(port) {
1576                 info = &i915->vbt.ddi_port_info[port];
1577
1578                 if (info->devdata && aux_ch == info->alternate_aux_channel)
1579                         return port;
1580         }
1581
1582         return PORT_NONE;
1583 }
1584
1585 static void sanitize_aux_ch(struct drm_i915_private *i915,
1586                             enum port port)
1587 {
1588         struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
1589         struct child_device_config *child;
1590         enum port p;
1591
1592         p = get_port_by_aux_ch(i915, info->alternate_aux_channel);
1593         if (p == PORT_NONE)
1594                 return;
1595
1596         drm_dbg_kms(&i915->drm,
1597                     "port %c trying to use the same AUX CH (0x%x) as port %c, "
1598                     "disabling port %c DP support\n",
1599                     port_name(port), info->alternate_aux_channel,
1600                     port_name(p), port_name(p));
1601
1602         /*
1603          * If we have multiple ports supposedly sharing the aux channel, then DP
1604          * couldn't exist on the shared port. Otherwise they share the same aux
1605          * channel and system couldn't communicate with them separately.
1606          *
1607          * Give inverse child device order the priority, last one wins. Yes,
1608          * there are real machines (eg. Asrock B250M-HDV) where VBT has both
1609          * port A and port E with the same AUX ch and we must pick port E :(
1610          */
1611         info = &i915->vbt.ddi_port_info[p];
1612         child = &info->devdata->child;
1613
1614         child->device_type &= ~DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1615         info->alternate_aux_channel = 0;
1616 }
1617
1618 static const u8 cnp_ddc_pin_map[] = {
1619         [0] = 0, /* N/A */
1620         [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
1621         [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
1622         [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
1623         [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
1624 };
1625
1626 static const u8 icp_ddc_pin_map[] = {
1627         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1628         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1629         [TGL_DDC_BUS_DDI_C] = GMBUS_PIN_3_BXT,
1630         [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
1631         [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
1632         [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
1633         [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
1634         [TGL_DDC_BUS_PORT_5] = GMBUS_PIN_13_TC5_TGP,
1635         [TGL_DDC_BUS_PORT_6] = GMBUS_PIN_14_TC6_TGP,
1636 };
1637
1638 static const u8 rkl_pch_tgp_ddc_pin_map[] = {
1639         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1640         [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1641         [RKL_DDC_BUS_DDI_D] = GMBUS_PIN_9_TC1_ICP,
1642         [RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
1643 };
1644
1645 static const u8 adls_ddc_pin_map[] = {
1646         [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1647         [ADLS_DDC_BUS_PORT_TC1] = GMBUS_PIN_9_TC1_ICP,
1648         [ADLS_DDC_BUS_PORT_TC2] = GMBUS_PIN_10_TC2_ICP,
1649         [ADLS_DDC_BUS_PORT_TC3] = GMBUS_PIN_11_TC3_ICP,
1650         [ADLS_DDC_BUS_PORT_TC4] = GMBUS_PIN_12_TC4_ICP,
1651 };
1652
1653 static const u8 gen9bc_tgp_ddc_pin_map[] = {
1654         [DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1655         [DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
1656         [DDC_BUS_DDI_D] = GMBUS_PIN_10_TC2_ICP,
1657 };
1658
1659 static u8 map_ddc_pin(struct drm_i915_private *i915, u8 vbt_pin)
1660 {
1661         const u8 *ddc_pin_map;
1662         int n_entries;
1663
1664         if (IS_ALDERLAKE_S(i915)) {
1665                 ddc_pin_map = adls_ddc_pin_map;
1666                 n_entries = ARRAY_SIZE(adls_ddc_pin_map);
1667         } else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) {
1668                 return vbt_pin;
1669         } else if (IS_ROCKETLAKE(i915) && INTEL_PCH_TYPE(i915) == PCH_TGP) {
1670                 ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
1671                 n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
1672         } else if (HAS_PCH_TGP(i915) && DISPLAY_VER(i915) == 9) {
1673                 ddc_pin_map = gen9bc_tgp_ddc_pin_map;
1674                 n_entries = ARRAY_SIZE(gen9bc_tgp_ddc_pin_map);
1675         } else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) {
1676                 ddc_pin_map = icp_ddc_pin_map;
1677                 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
1678         } else if (HAS_PCH_CNP(i915)) {
1679                 ddc_pin_map = cnp_ddc_pin_map;
1680                 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
1681         } else {
1682                 /* Assuming direct map */
1683                 return vbt_pin;
1684         }
1685
1686         if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
1687                 return ddc_pin_map[vbt_pin];
1688
1689         drm_dbg_kms(&i915->drm,
1690                     "Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
1691                     vbt_pin);
1692         return 0;
1693 }
1694
1695 static enum port __dvo_port_to_port(int n_ports, int n_dvo,
1696                                     const int port_mapping[][3], u8 dvo_port)
1697 {
1698         enum port port;
1699         int i;
1700
1701         for (port = PORT_A; port < n_ports; port++) {
1702                 for (i = 0; i < n_dvo; i++) {
1703                         if (port_mapping[port][i] == -1)
1704                                 break;
1705
1706                         if (dvo_port == port_mapping[port][i])
1707                                 return port;
1708                 }
1709         }
1710
1711         return PORT_NONE;
1712 }
1713
1714 static enum port dvo_port_to_port(struct drm_i915_private *i915,
1715                                   u8 dvo_port)
1716 {
1717         /*
1718          * Each DDI port can have more than one value on the "DVO Port" field,
1719          * so look for all the possible values for each port.
1720          */
1721         static const int port_mapping[][3] = {
1722                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1723                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1724                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1725                 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1726                 [PORT_E] = { DVO_PORT_HDMIE, DVO_PORT_DPE, DVO_PORT_CRT },
1727                 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
1728                 [PORT_G] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
1729                 [PORT_H] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
1730                 [PORT_I] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
1731         };
1732         /*
1733          * RKL VBT uses PHY based mapping. Combo PHYs A,B,C,D
1734          * map to DDI A,B,TC1,TC2 respectively.
1735          */
1736         static const int rkl_port_mapping[][3] = {
1737                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1738                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1739                 [PORT_C] = { -1 },
1740                 [PORT_TC1] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1741                 [PORT_TC2] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1742         };
1743         /*
1744          * Alderlake S ports used in the driver are PORT_A, PORT_D, PORT_E,
1745          * PORT_F and PORT_G, we need to map that to correct VBT sections.
1746          */
1747         static const int adls_port_mapping[][3] = {
1748                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1749                 [PORT_B] = { -1 },
1750                 [PORT_C] = { -1 },
1751                 [PORT_TC1] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1752                 [PORT_TC2] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1753                 [PORT_TC3] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1754                 [PORT_TC4] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
1755         };
1756         static const int xelpd_port_mapping[][3] = {
1757                 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1 },
1758                 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1 },
1759                 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1 },
1760                 [PORT_D_XELPD] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1 },
1761                 [PORT_E_XELPD] = { DVO_PORT_HDMIE, DVO_PORT_DPE, -1 },
1762                 [PORT_TC1] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1 },
1763                 [PORT_TC2] = { DVO_PORT_HDMIG, DVO_PORT_DPG, -1 },
1764                 [PORT_TC3] = { DVO_PORT_HDMIH, DVO_PORT_DPH, -1 },
1765                 [PORT_TC4] = { DVO_PORT_HDMII, DVO_PORT_DPI, -1 },
1766         };
1767
1768         if (DISPLAY_VER(i915) == 13)
1769                 return __dvo_port_to_port(ARRAY_SIZE(xelpd_port_mapping),
1770                                           ARRAY_SIZE(xelpd_port_mapping[0]),
1771                                           xelpd_port_mapping,
1772                                           dvo_port);
1773         else if (IS_ALDERLAKE_S(i915))
1774                 return __dvo_port_to_port(ARRAY_SIZE(adls_port_mapping),
1775                                           ARRAY_SIZE(adls_port_mapping[0]),
1776                                           adls_port_mapping,
1777                                           dvo_port);
1778         else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
1779                 return __dvo_port_to_port(ARRAY_SIZE(rkl_port_mapping),
1780                                           ARRAY_SIZE(rkl_port_mapping[0]),
1781                                           rkl_port_mapping,
1782                                           dvo_port);
1783         else
1784                 return __dvo_port_to_port(ARRAY_SIZE(port_mapping),
1785                                           ARRAY_SIZE(port_mapping[0]),
1786                                           port_mapping,
1787                                           dvo_port);
1788 }
1789
1790 static int parse_bdb_230_dp_max_link_rate(const int vbt_max_link_rate)
1791 {
1792         switch (vbt_max_link_rate) {
1793         default:
1794         case BDB_230_VBT_DP_MAX_LINK_RATE_DEF:
1795                 return 0;
1796         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20:
1797                 return 2000000;
1798         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5:
1799                 return 1350000;
1800         case BDB_230_VBT_DP_MAX_LINK_RATE_UHBR10:
1801                 return 1000000;
1802         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR3:
1803                 return 810000;
1804         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR2:
1805                 return 540000;
1806         case BDB_230_VBT_DP_MAX_LINK_RATE_HBR:
1807                 return 270000;
1808         case BDB_230_VBT_DP_MAX_LINK_RATE_LBR:
1809                 return 162000;
1810         }
1811 }
1812
1813 static int parse_bdb_216_dp_max_link_rate(const int vbt_max_link_rate)
1814 {
1815         switch (vbt_max_link_rate) {
1816         default:
1817         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR3:
1818                 return 810000;
1819         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR2:
1820                 return 540000;
1821         case BDB_216_VBT_DP_MAX_LINK_RATE_HBR:
1822                 return 270000;
1823         case BDB_216_VBT_DP_MAX_LINK_RATE_LBR:
1824                 return 162000;
1825         }
1826 }
1827
1828 static void sanitize_device_type(struct intel_bios_encoder_data *devdata,
1829                                  enum port port)
1830 {
1831         struct drm_i915_private *i915 = devdata->i915;
1832         bool is_hdmi;
1833
1834         if (port != PORT_A || DISPLAY_VER(i915) >= 12)
1835                 return;
1836
1837         if (!(devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING))
1838                 return;
1839
1840         is_hdmi = !(devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT);
1841
1842         drm_dbg_kms(&i915->drm, "VBT claims port A supports DVI%s, ignoring\n",
1843                     is_hdmi ? "/HDMI" : "");
1844
1845         devdata->child.device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
1846         devdata->child.device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
1847 }
1848
1849 static bool
1850 intel_bios_encoder_supports_crt(const struct intel_bios_encoder_data *devdata)
1851 {
1852         return devdata->child.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1853 }
1854
1855 bool
1856 intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata)
1857 {
1858         return devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1859 }
1860
1861 bool
1862 intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata)
1863 {
1864         return intel_bios_encoder_supports_dvi(devdata) &&
1865                 (devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1866 }
1867
1868 bool
1869 intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata)
1870 {
1871         return devdata->child.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1872 }
1873
1874 static bool
1875 intel_bios_encoder_supports_edp(const struct intel_bios_encoder_data *devdata)
1876 {
1877         return intel_bios_encoder_supports_dp(devdata) &&
1878                 devdata->child.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR;
1879 }
1880
1881 static bool is_port_valid(struct drm_i915_private *i915, enum port port)
1882 {
1883         /*
1884          * On some ICL SKUs port F is not present, but broken VBTs mark
1885          * the port as present. Only try to initialize port F for the
1886          * SKUs that may actually have it.
1887          */
1888         if (port == PORT_F && IS_ICELAKE(i915))
1889                 return IS_ICL_WITH_PORT_F(i915);
1890
1891         return true;
1892 }
1893
1894 static void parse_ddi_port(struct drm_i915_private *i915,
1895                            struct intel_bios_encoder_data *devdata)
1896 {
1897         const struct child_device_config *child = &devdata->child;
1898         struct ddi_vbt_port_info *info;
1899         bool is_dvi, is_hdmi, is_dp, is_edp, is_crt, supports_typec_usb, supports_tbt;
1900         int dp_boost_level, hdmi_boost_level;
1901         enum port port;
1902
1903         port = dvo_port_to_port(i915, child->dvo_port);
1904         if (port == PORT_NONE)
1905                 return;
1906
1907         if (!is_port_valid(i915, port)) {
1908                 drm_dbg_kms(&i915->drm,
1909                             "VBT reports port %c as supported, but that can't be true: skipping\n",
1910                             port_name(port));
1911                 return;
1912         }
1913
1914         info = &i915->vbt.ddi_port_info[port];
1915
1916         if (info->devdata) {
1917                 drm_dbg_kms(&i915->drm,
1918                             "More than one child device for port %c in VBT, using the first.\n",
1919                             port_name(port));
1920                 return;
1921         }
1922
1923         sanitize_device_type(devdata, port);
1924
1925         is_dvi = intel_bios_encoder_supports_dvi(devdata);
1926         is_dp = intel_bios_encoder_supports_dp(devdata);
1927         is_crt = intel_bios_encoder_supports_crt(devdata);
1928         is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
1929         is_edp = intel_bios_encoder_supports_edp(devdata);
1930
1931         supports_typec_usb = intel_bios_encoder_supports_typec_usb(devdata);
1932         supports_tbt = intel_bios_encoder_supports_tbt(devdata);
1933
1934         drm_dbg_kms(&i915->drm,
1935                     "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",
1936                     port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp,
1937                     HAS_LSPCON(i915) && child->lspcon,
1938                     supports_typec_usb, supports_tbt,
1939                     devdata->dsc != NULL);
1940
1941         if (is_dvi) {
1942                 u8 ddc_pin;
1943
1944                 ddc_pin = map_ddc_pin(i915, child->ddc_pin);
1945                 if (intel_gmbus_is_valid_pin(i915, ddc_pin)) {
1946                         info->alternate_ddc_pin = ddc_pin;
1947                         sanitize_ddc_pin(i915, port);
1948                 } else {
1949                         drm_dbg_kms(&i915->drm,
1950                                     "Port %c has invalid DDC pin %d, "
1951                                     "sticking to defaults\n",
1952                                     port_name(port), ddc_pin);
1953                 }
1954         }
1955
1956         if (is_dp) {
1957                 info->alternate_aux_channel = child->aux_channel;
1958
1959                 sanitize_aux_ch(i915, port);
1960         }
1961
1962         if (i915->vbt.version >= 158) {
1963                 /* The VBT HDMI level shift values match the table we have. */
1964                 u8 hdmi_level_shift = child->hdmi_level_shifter_value;
1965                 drm_dbg_kms(&i915->drm,
1966                             "Port %c VBT HDMI level shift: %d\n",
1967                             port_name(port),
1968                             hdmi_level_shift);
1969                 info->hdmi_level_shift = hdmi_level_shift;
1970                 info->hdmi_level_shift_set = true;
1971         }
1972
1973         if (i915->vbt.version >= 204) {
1974                 int max_tmds_clock;
1975
1976                 switch (child->hdmi_max_data_rate) {
1977                 default:
1978                         MISSING_CASE(child->hdmi_max_data_rate);
1979                         fallthrough;
1980                 case HDMI_MAX_DATA_RATE_PLATFORM:
1981                         max_tmds_clock = 0;
1982                         break;
1983                 case HDMI_MAX_DATA_RATE_297:
1984                         max_tmds_clock = 297000;
1985                         break;
1986                 case HDMI_MAX_DATA_RATE_165:
1987                         max_tmds_clock = 165000;
1988                         break;
1989                 }
1990
1991                 if (max_tmds_clock)
1992                         drm_dbg_kms(&i915->drm,
1993                                     "Port %c VBT HDMI max TMDS clock: %d kHz\n",
1994                                     port_name(port), max_tmds_clock);
1995                 info->max_tmds_clock = max_tmds_clock;
1996         }
1997
1998         /* I_boost config for SKL and above */
1999         dp_boost_level = intel_bios_encoder_dp_boost_level(devdata);
2000         if (dp_boost_level)
2001                 drm_dbg_kms(&i915->drm,
2002                             "Port %c VBT (e)DP boost level: %d\n",
2003                             port_name(port), dp_boost_level);
2004
2005         hdmi_boost_level = intel_bios_encoder_hdmi_boost_level(devdata);
2006         if (hdmi_boost_level)
2007                 drm_dbg_kms(&i915->drm,
2008                             "Port %c VBT HDMI boost level: %d\n",
2009                             port_name(port), hdmi_boost_level);
2010
2011         /* DP max link rate for GLK+ */
2012         if (i915->vbt.version >= 216) {
2013                 if (i915->vbt.version >= 230)
2014                         info->dp_max_link_rate = parse_bdb_230_dp_max_link_rate(child->dp_max_link_rate);
2015                 else
2016                         info->dp_max_link_rate = parse_bdb_216_dp_max_link_rate(child->dp_max_link_rate);
2017
2018                 drm_dbg_kms(&i915->drm,
2019                             "Port %c VBT DP max link rate: %d\n",
2020                             port_name(port), info->dp_max_link_rate);
2021         }
2022
2023         info->devdata = devdata;
2024 }
2025
2026 static void parse_ddi_ports(struct drm_i915_private *i915)
2027 {
2028         struct intel_bios_encoder_data *devdata;
2029
2030         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
2031                 return;
2032
2033         if (i915->vbt.version < 155)
2034                 return;
2035
2036         list_for_each_entry(devdata, &i915->vbt.display_devices, node)
2037                 parse_ddi_port(i915, devdata);
2038 }
2039
2040 static void
2041 parse_general_definitions(struct drm_i915_private *i915,
2042                           const struct bdb_header *bdb)
2043 {
2044         const struct bdb_general_definitions *defs;
2045         struct intel_bios_encoder_data *devdata;
2046         const struct child_device_config *child;
2047         int i, child_device_num;
2048         u8 expected_size;
2049         u16 block_size;
2050         int bus_pin;
2051
2052         defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
2053         if (!defs) {
2054                 drm_dbg_kms(&i915->drm,
2055                             "No general definition block is found, no devices defined.\n");
2056                 return;
2057         }
2058
2059         block_size = get_blocksize(defs);
2060         if (block_size < sizeof(*defs)) {
2061                 drm_dbg_kms(&i915->drm,
2062                             "General definitions block too small (%u)\n",
2063                             block_size);
2064                 return;
2065         }
2066
2067         bus_pin = defs->crt_ddc_gmbus_pin;
2068         drm_dbg_kms(&i915->drm, "crt_ddc_bus_pin: %d\n", bus_pin);
2069         if (intel_gmbus_is_valid_pin(i915, bus_pin))
2070                 i915->vbt.crt_ddc_pin = bus_pin;
2071
2072         if (bdb->version < 106) {
2073                 expected_size = 22;
2074         } else if (bdb->version < 111) {
2075                 expected_size = 27;
2076         } else if (bdb->version < 195) {
2077                 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
2078         } else if (bdb->version == 195) {
2079                 expected_size = 37;
2080         } else if (bdb->version <= 215) {
2081                 expected_size = 38;
2082         } else if (bdb->version <= 237) {
2083                 expected_size = 39;
2084         } else {
2085                 expected_size = sizeof(*child);
2086                 BUILD_BUG_ON(sizeof(*child) < 39);
2087                 drm_dbg(&i915->drm,
2088                         "Expected child device config size for VBT version %u not known; assuming %u\n",
2089                         bdb->version, expected_size);
2090         }
2091
2092         /* Flag an error for unexpected size, but continue anyway. */
2093         if (defs->child_dev_size != expected_size)
2094                 drm_err(&i915->drm,
2095                         "Unexpected child device config size %u (expected %u for VBT version %u)\n",
2096                         defs->child_dev_size, expected_size, bdb->version);
2097
2098         /* The legacy sized child device config is the minimum we need. */
2099         if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
2100                 drm_dbg_kms(&i915->drm,
2101                             "Child device config size %u is too small.\n",
2102                             defs->child_dev_size);
2103                 return;
2104         }
2105
2106         /* get the number of child device */
2107         child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
2108
2109         for (i = 0; i < child_device_num; i++) {
2110                 child = child_device_ptr(defs, i);
2111                 if (!child->device_type)
2112                         continue;
2113
2114                 drm_dbg_kms(&i915->drm,
2115                             "Found VBT child device with type 0x%x\n",
2116                             child->device_type);
2117
2118                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2119                 if (!devdata)
2120                         break;
2121
2122                 devdata->i915 = i915;
2123
2124                 /*
2125                  * Copy as much as we know (sizeof) and is available
2126                  * (child_dev_size) of the child device config. Accessing the
2127                  * data must depend on VBT version.
2128                  */
2129                 memcpy(&devdata->child, child,
2130                        min_t(size_t, defs->child_dev_size, sizeof(*child)));
2131
2132                 list_add_tail(&devdata->node, &i915->vbt.display_devices);
2133         }
2134
2135         if (list_empty(&i915->vbt.display_devices))
2136                 drm_dbg_kms(&i915->drm,
2137                             "no child dev is parsed from VBT\n");
2138 }
2139
2140 /* Common defaults which may be overridden by VBT. */
2141 static void
2142 init_vbt_defaults(struct drm_i915_private *i915)
2143 {
2144         i915->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2145
2146         /* Default to having backlight */
2147         i915->vbt.backlight.present = true;
2148
2149         /* LFP panel data */
2150         i915->vbt.lvds_dither = 1;
2151
2152         /* SDVO panel data */
2153         i915->vbt.sdvo_lvds_vbt_mode = NULL;
2154
2155         /* general features */
2156         i915->vbt.int_tv_support = 1;
2157         i915->vbt.int_crt_support = 1;
2158
2159         /* driver features */
2160         i915->vbt.int_lvds_support = 1;
2161
2162         /* Default to using SSC */
2163         i915->vbt.lvds_use_ssc = 1;
2164         /*
2165          * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
2166          * clock for LVDS.
2167          */
2168         i915->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(i915,
2169                                                            !HAS_PCH_SPLIT(i915));
2170         drm_dbg_kms(&i915->drm, "Set default to SSC at %d kHz\n",
2171                     i915->vbt.lvds_ssc_freq);
2172 }
2173
2174 /* Defaults to initialize only if there is no VBT. */
2175 static void
2176 init_vbt_missing_defaults(struct drm_i915_private *i915)
2177 {
2178         enum port port;
2179         int ports = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) |
2180                     BIT(PORT_D) | BIT(PORT_E) | BIT(PORT_F);
2181
2182         if (!HAS_DDI(i915) && !IS_CHERRYVIEW(i915))
2183                 return;
2184
2185         for_each_port_masked(port, ports) {
2186                 struct intel_bios_encoder_data *devdata;
2187                 struct child_device_config *child;
2188                 enum phy phy = intel_port_to_phy(i915, port);
2189
2190                 /*
2191                  * VBT has the TypeC mode (native,TBT/USB) and we don't want
2192                  * to detect it.
2193                  */
2194                 if (intel_phy_is_tc(i915, phy))
2195                         continue;
2196
2197                 /* Create fake child device config */
2198                 devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
2199                 if (!devdata)
2200                         break;
2201
2202                 devdata->i915 = i915;
2203                 child = &devdata->child;
2204
2205                 if (port == PORT_F)
2206                         child->dvo_port = DVO_PORT_HDMIF;
2207                 else if (port == PORT_E)
2208                         child->dvo_port = DVO_PORT_HDMIE;
2209                 else
2210                         child->dvo_port = DVO_PORT_HDMIA + port;
2211
2212                 if (port != PORT_A && port != PORT_E)
2213                         child->device_type |= DEVICE_TYPE_TMDS_DVI_SIGNALING;
2214
2215                 if (port != PORT_E)
2216                         child->device_type |= DEVICE_TYPE_DISPLAYPORT_OUTPUT;
2217
2218                 if (port == PORT_A)
2219                         child->device_type |= DEVICE_TYPE_INTERNAL_CONNECTOR;
2220
2221                 list_add_tail(&devdata->node, &i915->vbt.display_devices);
2222
2223                 drm_dbg_kms(&i915->drm,
2224                             "Generating default VBT child device with type 0x04%x on port %c\n",
2225                             child->device_type, port_name(port));
2226         }
2227
2228         /* Bypass some minimum baseline VBT version checks */
2229         i915->vbt.version = 155;
2230 }
2231
2232 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
2233 {
2234         const void *_vbt = vbt;
2235
2236         return _vbt + vbt->bdb_offset;
2237 }
2238
2239 /**
2240  * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
2241  * @buf:        pointer to a buffer to validate
2242  * @size:       size of the buffer
2243  *
2244  * Returns true on valid VBT.
2245  */
2246 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
2247 {
2248         const struct vbt_header *vbt = buf;
2249         const struct bdb_header *bdb;
2250
2251         if (!vbt)
2252                 return false;
2253
2254         if (sizeof(struct vbt_header) > size) {
2255                 DRM_DEBUG_DRIVER("VBT header incomplete\n");
2256                 return false;
2257         }
2258
2259         if (memcmp(vbt->signature, "$VBT", 4)) {
2260                 DRM_DEBUG_DRIVER("VBT invalid signature\n");
2261                 return false;
2262         }
2263
2264         if (vbt->vbt_size > size) {
2265                 DRM_DEBUG_DRIVER("VBT incomplete (vbt_size overflows)\n");
2266                 return false;
2267         }
2268
2269         size = vbt->vbt_size;
2270
2271         if (range_overflows_t(size_t,
2272                               vbt->bdb_offset,
2273                               sizeof(struct bdb_header),
2274                               size)) {
2275                 DRM_DEBUG_DRIVER("BDB header incomplete\n");
2276                 return false;
2277         }
2278
2279         bdb = get_bdb_header(vbt);
2280         if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
2281                 DRM_DEBUG_DRIVER("BDB incomplete\n");
2282                 return false;
2283         }
2284
2285         return vbt;
2286 }
2287
2288 static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915)
2289 {
2290         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
2291         void __iomem *p = NULL, *oprom;
2292         struct vbt_header *vbt;
2293         u16 vbt_size;
2294         size_t i, size;
2295
2296         oprom = pci_map_rom(pdev, &size);
2297         if (!oprom)
2298                 return NULL;
2299
2300         /* Scour memory looking for the VBT signature. */
2301         for (i = 0; i + 4 < size; i += 4) {
2302                 if (ioread32(oprom + i) != *((const u32 *)"$VBT"))
2303                         continue;
2304
2305                 p = oprom + i;
2306                 size -= i;
2307                 break;
2308         }
2309
2310         if (!p)
2311                 goto err_unmap_oprom;
2312
2313         if (sizeof(struct vbt_header) > size) {
2314                 drm_dbg(&i915->drm, "VBT header incomplete\n");
2315                 goto err_unmap_oprom;
2316         }
2317
2318         vbt_size = ioread16(p + offsetof(struct vbt_header, vbt_size));
2319         if (vbt_size > size) {
2320                 drm_dbg(&i915->drm,
2321                         "VBT incomplete (vbt_size overflows)\n");
2322                 goto err_unmap_oprom;
2323         }
2324
2325         /* The rest will be validated by intel_bios_is_valid_vbt() */
2326         vbt = kmalloc(vbt_size, GFP_KERNEL);
2327         if (!vbt)
2328                 goto err_unmap_oprom;
2329
2330         memcpy_fromio(vbt, p, vbt_size);
2331
2332         if (!intel_bios_is_valid_vbt(vbt, vbt_size))
2333                 goto err_free_vbt;
2334
2335         pci_unmap_rom(pdev, oprom);
2336
2337         return vbt;
2338
2339 err_free_vbt:
2340         kfree(vbt);
2341 err_unmap_oprom:
2342         pci_unmap_rom(pdev, oprom);
2343
2344         return NULL;
2345 }
2346
2347 /**
2348  * intel_bios_init - find VBT and initialize settings from the BIOS
2349  * @i915: i915 device instance
2350  *
2351  * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
2352  * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
2353  * initialize some defaults if the VBT is not present at all.
2354  */
2355 void intel_bios_init(struct drm_i915_private *i915)
2356 {
2357         const struct vbt_header *vbt = i915->opregion.vbt;
2358         struct vbt_header *oprom_vbt = NULL;
2359         const struct bdb_header *bdb;
2360
2361         INIT_LIST_HEAD(&i915->vbt.display_devices);
2362
2363         if (!HAS_DISPLAY(i915)) {
2364                 drm_dbg_kms(&i915->drm,
2365                             "Skipping VBT init due to disabled display.\n");
2366                 return;
2367         }
2368
2369         init_vbt_defaults(i915);
2370
2371         /* If the OpRegion does not have VBT, look in PCI ROM. */
2372         if (!vbt) {
2373                 oprom_vbt = oprom_get_vbt(i915);
2374                 if (!oprom_vbt)
2375                         goto out;
2376
2377                 vbt = oprom_vbt;
2378
2379                 drm_dbg_kms(&i915->drm, "Found valid VBT in PCI ROM\n");
2380         }
2381
2382         bdb = get_bdb_header(vbt);
2383         i915->vbt.version = bdb->version;
2384
2385         drm_dbg_kms(&i915->drm,
2386                     "VBT signature \"%.*s\", BDB version %d\n",
2387                     (int)sizeof(vbt->signature), vbt->signature, bdb->version);
2388
2389         /* Grab useful general definitions */
2390         parse_general_features(i915, bdb);
2391         parse_general_definitions(i915, bdb);
2392         parse_panel_options(i915, bdb);
2393         parse_panel_dtd(i915, bdb);
2394         parse_lfp_backlight(i915, bdb);
2395         parse_sdvo_panel_data(i915, bdb);
2396         parse_driver_features(i915, bdb);
2397         parse_power_conservation_features(i915, bdb);
2398         parse_edp(i915, bdb);
2399         parse_psr(i915, bdb);
2400         parse_mipi_config(i915, bdb);
2401         parse_mipi_sequence(i915, bdb);
2402
2403         /* Depends on child device list */
2404         parse_compression_parameters(i915, bdb);
2405
2406 out:
2407         if (!vbt) {
2408                 drm_info(&i915->drm,
2409                          "Failed to find VBIOS tables (VBT)\n");
2410                 init_vbt_missing_defaults(i915);
2411         }
2412
2413         /* Further processing on pre-parsed or generated child device data */
2414         parse_sdvo_device_mapping(i915);
2415         parse_ddi_ports(i915);
2416
2417         kfree(oprom_vbt);
2418 }
2419
2420 /**
2421  * intel_bios_driver_remove - Free any resources allocated by intel_bios_init()
2422  * @i915: i915 device instance
2423  */
2424 void intel_bios_driver_remove(struct drm_i915_private *i915)
2425 {
2426         struct intel_bios_encoder_data *devdata, *n;
2427
2428         list_for_each_entry_safe(devdata, n, &i915->vbt.display_devices, node) {
2429                 list_del(&devdata->node);
2430                 kfree(devdata->dsc);
2431                 kfree(devdata);
2432         }
2433
2434         kfree(i915->vbt.sdvo_lvds_vbt_mode);
2435         i915->vbt.sdvo_lvds_vbt_mode = NULL;
2436         kfree(i915->vbt.lfp_lvds_vbt_mode);
2437         i915->vbt.lfp_lvds_vbt_mode = NULL;
2438         kfree(i915->vbt.dsi.data);
2439         i915->vbt.dsi.data = NULL;
2440         kfree(i915->vbt.dsi.pps);
2441         i915->vbt.dsi.pps = NULL;
2442         kfree(i915->vbt.dsi.config);
2443         i915->vbt.dsi.config = NULL;
2444         kfree(i915->vbt.dsi.deassert_seq);
2445         i915->vbt.dsi.deassert_seq = NULL;
2446 }
2447
2448 /**
2449  * intel_bios_is_tv_present - is integrated TV present in VBT
2450  * @i915: i915 device instance
2451  *
2452  * Return true if TV is present. If no child devices were parsed from VBT,
2453  * assume TV is present.
2454  */
2455 bool intel_bios_is_tv_present(struct drm_i915_private *i915)
2456 {
2457         const struct intel_bios_encoder_data *devdata;
2458         const struct child_device_config *child;
2459
2460         if (!i915->vbt.int_tv_support)
2461                 return false;
2462
2463         if (list_empty(&i915->vbt.display_devices))
2464                 return true;
2465
2466         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2467                 child = &devdata->child;
2468
2469                 /*
2470                  * If the device type is not TV, continue.
2471                  */
2472                 switch (child->device_type) {
2473                 case DEVICE_TYPE_INT_TV:
2474                 case DEVICE_TYPE_TV:
2475                 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
2476                         break;
2477                 default:
2478                         continue;
2479                 }
2480                 /* Only when the addin_offset is non-zero, it is regarded
2481                  * as present.
2482                  */
2483                 if (child->addin_offset)
2484                         return true;
2485         }
2486
2487         return false;
2488 }
2489
2490 /**
2491  * intel_bios_is_lvds_present - is LVDS present in VBT
2492  * @i915:       i915 device instance
2493  * @i2c_pin:    i2c pin for LVDS if present
2494  *
2495  * Return true if LVDS is present. If no child devices were parsed from VBT,
2496  * assume LVDS is present.
2497  */
2498 bool intel_bios_is_lvds_present(struct drm_i915_private *i915, u8 *i2c_pin)
2499 {
2500         const struct intel_bios_encoder_data *devdata;
2501         const struct child_device_config *child;
2502
2503         if (list_empty(&i915->vbt.display_devices))
2504                 return true;
2505
2506         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2507                 child = &devdata->child;
2508
2509                 /* If the device type is not LFP, continue.
2510                  * We have to check both the new identifiers as well as the
2511                  * old for compatibility with some BIOSes.
2512                  */
2513                 if (child->device_type != DEVICE_TYPE_INT_LFP &&
2514                     child->device_type != DEVICE_TYPE_LFP)
2515                         continue;
2516
2517                 if (intel_gmbus_is_valid_pin(i915, child->i2c_pin))
2518                         *i2c_pin = child->i2c_pin;
2519
2520                 /* However, we cannot trust the BIOS writers to populate
2521                  * the VBT correctly.  Since LVDS requires additional
2522                  * information from AIM blocks, a non-zero addin offset is
2523                  * a good indicator that the LVDS is actually present.
2524                  */
2525                 if (child->addin_offset)
2526                         return true;
2527
2528                 /* But even then some BIOS writers perform some black magic
2529                  * and instantiate the device without reference to any
2530                  * additional data.  Trust that if the VBT was written into
2531                  * the OpRegion then they have validated the LVDS's existence.
2532                  */
2533                 if (i915->opregion.vbt)
2534                         return true;
2535         }
2536
2537         return false;
2538 }
2539
2540 /**
2541  * intel_bios_is_port_present - is the specified digital port present
2542  * @i915:       i915 device instance
2543  * @port:       port to check
2544  *
2545  * Return true if the device in %port is present.
2546  */
2547 bool intel_bios_is_port_present(struct drm_i915_private *i915, enum port port)
2548 {
2549         const struct intel_bios_encoder_data *devdata;
2550         const struct child_device_config *child;
2551         static const struct {
2552                 u16 dp, hdmi;
2553         } port_mapping[] = {
2554                 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2555                 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2556                 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2557                 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2558                 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2559         };
2560
2561         if (HAS_DDI(i915)) {
2562                 const struct ddi_vbt_port_info *port_info =
2563                         &i915->vbt.ddi_port_info[port];
2564
2565                 return port_info->devdata;
2566         }
2567
2568         /* FIXME maybe deal with port A as well? */
2569         if (drm_WARN_ON(&i915->drm,
2570                         port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
2571                 return false;
2572
2573         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2574                 child = &devdata->child;
2575
2576                 if ((child->dvo_port == port_mapping[port].dp ||
2577                      child->dvo_port == port_mapping[port].hdmi) &&
2578                     (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
2579                                            DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
2580                         return true;
2581         }
2582
2583         return false;
2584 }
2585
2586 /**
2587  * intel_bios_is_port_edp - is the device in given port eDP
2588  * @i915:       i915 device instance
2589  * @port:       port to check
2590  *
2591  * Return true if the device in %port is eDP.
2592  */
2593 bool intel_bios_is_port_edp(struct drm_i915_private *i915, enum port port)
2594 {
2595         const struct intel_bios_encoder_data *devdata;
2596         const struct child_device_config *child;
2597         static const short port_mapping[] = {
2598                 [PORT_B] = DVO_PORT_DPB,
2599                 [PORT_C] = DVO_PORT_DPC,
2600                 [PORT_D] = DVO_PORT_DPD,
2601                 [PORT_E] = DVO_PORT_DPE,
2602                 [PORT_F] = DVO_PORT_DPF,
2603         };
2604
2605         if (HAS_DDI(i915)) {
2606                 const struct intel_bios_encoder_data *devdata;
2607
2608                 devdata = intel_bios_encoder_data_lookup(i915, port);
2609
2610                 return devdata && intel_bios_encoder_supports_edp(devdata);
2611         }
2612
2613         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2614                 child = &devdata->child;
2615
2616                 if (child->dvo_port == port_mapping[port] &&
2617                     (child->device_type & DEVICE_TYPE_eDP_BITS) ==
2618                     (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
2619                         return true;
2620         }
2621
2622         return false;
2623 }
2624
2625 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
2626                                       enum port port)
2627 {
2628         static const struct {
2629                 u16 dp, hdmi;
2630         } port_mapping[] = {
2631                 /*
2632                  * Buggy VBTs may declare DP ports as having
2633                  * HDMI type dvo_port :( So let's check both.
2634                  */
2635                 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2636                 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2637                 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2638                 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2639                 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2640         };
2641
2642         if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
2643                 return false;
2644
2645         if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
2646             (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
2647                 return false;
2648
2649         if (child->dvo_port == port_mapping[port].dp)
2650                 return true;
2651
2652         /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
2653         if (child->dvo_port == port_mapping[port].hdmi &&
2654             child->aux_channel != 0)
2655                 return true;
2656
2657         return false;
2658 }
2659
2660 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *i915,
2661                                      enum port port)
2662 {
2663         const struct intel_bios_encoder_data *devdata;
2664
2665         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2666                 if (child_dev_is_dp_dual_mode(&devdata->child, port))
2667                         return true;
2668         }
2669
2670         return false;
2671 }
2672
2673 /**
2674  * intel_bios_is_dsi_present - is DSI present in VBT
2675  * @i915:       i915 device instance
2676  * @port:       port for DSI if present
2677  *
2678  * Return true if DSI is present, and return the port in %port.
2679  */
2680 bool intel_bios_is_dsi_present(struct drm_i915_private *i915,
2681                                enum port *port)
2682 {
2683         const struct intel_bios_encoder_data *devdata;
2684         const struct child_device_config *child;
2685         u8 dvo_port;
2686
2687         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2688                 child = &devdata->child;
2689
2690                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2691                         continue;
2692
2693                 dvo_port = child->dvo_port;
2694
2695                 if (dvo_port == DVO_PORT_MIPIA ||
2696                     (dvo_port == DVO_PORT_MIPIB && DISPLAY_VER(i915) >= 11) ||
2697                     (dvo_port == DVO_PORT_MIPIC && DISPLAY_VER(i915) < 11)) {
2698                         if (port)
2699                                 *port = dvo_port - DVO_PORT_MIPIA;
2700                         return true;
2701                 } else if (dvo_port == DVO_PORT_MIPIB ||
2702                            dvo_port == DVO_PORT_MIPIC ||
2703                            dvo_port == DVO_PORT_MIPID) {
2704                         drm_dbg_kms(&i915->drm,
2705                                     "VBT has unsupported DSI port %c\n",
2706                                     port_name(dvo_port - DVO_PORT_MIPIA));
2707                 }
2708         }
2709
2710         return false;
2711 }
2712
2713 static void fill_dsc(struct intel_crtc_state *crtc_state,
2714                      struct dsc_compression_parameters_entry *dsc,
2715                      int dsc_max_bpc)
2716 {
2717         struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
2718         int bpc = 8;
2719
2720         vdsc_cfg->dsc_version_major = dsc->version_major;
2721         vdsc_cfg->dsc_version_minor = dsc->version_minor;
2722
2723         if (dsc->support_12bpc && dsc_max_bpc >= 12)
2724                 bpc = 12;
2725         else if (dsc->support_10bpc && dsc_max_bpc >= 10)
2726                 bpc = 10;
2727         else if (dsc->support_8bpc && dsc_max_bpc >= 8)
2728                 bpc = 8;
2729         else
2730                 DRM_DEBUG_KMS("VBT: Unsupported BPC %d for DCS\n",
2731                               dsc_max_bpc);
2732
2733         crtc_state->pipe_bpp = bpc * 3;
2734
2735         crtc_state->dsc.compressed_bpp = min(crtc_state->pipe_bpp,
2736                                              VBT_DSC_MAX_BPP(dsc->max_bpp));
2737
2738         /*
2739          * FIXME: This is ugly, and slice count should take DSC engine
2740          * throughput etc. into account.
2741          *
2742          * Also, per spec DSI supports 1, 2, 3 or 4 horizontal slices.
2743          */
2744         if (dsc->slices_per_line & BIT(2)) {
2745                 crtc_state->dsc.slice_count = 4;
2746         } else if (dsc->slices_per_line & BIT(1)) {
2747                 crtc_state->dsc.slice_count = 2;
2748         } else {
2749                 /* FIXME */
2750                 if (!(dsc->slices_per_line & BIT(0)))
2751                         DRM_DEBUG_KMS("VBT: Unsupported DSC slice count for DSI\n");
2752
2753                 crtc_state->dsc.slice_count = 1;
2754         }
2755
2756         if (crtc_state->hw.adjusted_mode.crtc_hdisplay %
2757             crtc_state->dsc.slice_count != 0)
2758                 DRM_DEBUG_KMS("VBT: DSC hdisplay %d not divisible by slice count %d\n",
2759                               crtc_state->hw.adjusted_mode.crtc_hdisplay,
2760                               crtc_state->dsc.slice_count);
2761
2762         /*
2763          * The VBT rc_buffer_block_size and rc_buffer_size definitions
2764          * correspond to DP 1.4 DPCD offsets 0x62 and 0x63.
2765          */
2766         vdsc_cfg->rc_model_size = drm_dsc_dp_rc_buffer_size(dsc->rc_buffer_block_size,
2767                                                             dsc->rc_buffer_size);
2768
2769         /* FIXME: DSI spec says bpc + 1 for this one */
2770         vdsc_cfg->line_buf_depth = VBT_DSC_LINE_BUFFER_DEPTH(dsc->line_buffer_depth);
2771
2772         vdsc_cfg->block_pred_enable = dsc->block_prediction_enable;
2773
2774         vdsc_cfg->slice_height = dsc->slice_height;
2775 }
2776
2777 /* FIXME: initially DSI specific */
2778 bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
2779                                struct intel_crtc_state *crtc_state,
2780                                int dsc_max_bpc)
2781 {
2782         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2783         const struct intel_bios_encoder_data *devdata;
2784         const struct child_device_config *child;
2785
2786         list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
2787                 child = &devdata->child;
2788
2789                 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2790                         continue;
2791
2792                 if (child->dvo_port - DVO_PORT_MIPIA == encoder->port) {
2793                         if (!devdata->dsc)
2794                                 return false;
2795
2796                         if (crtc_state)
2797                                 fill_dsc(crtc_state, devdata->dsc, dsc_max_bpc);
2798
2799                         return true;
2800                 }
2801         }
2802
2803         return false;
2804 }
2805
2806 /**
2807  * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
2808  * @i915:       i915 device instance
2809  * @port:       port to check
2810  *
2811  * Return true if HPD should be inverted for %port.
2812  */
2813 bool
2814 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
2815                                 enum port port)
2816 {
2817         const struct intel_bios_encoder_data *devdata =
2818                 i915->vbt.ddi_port_info[port].devdata;
2819
2820         if (drm_WARN_ON_ONCE(&i915->drm,
2821                              !IS_GEMINILAKE(i915) && !IS_BROXTON(i915)))
2822                 return false;
2823
2824         return devdata && devdata->child.hpd_invert;
2825 }
2826
2827 /**
2828  * intel_bios_is_lspcon_present - if LSPCON is attached on %port
2829  * @i915:       i915 device instance
2830  * @port:       port to check
2831  *
2832  * Return true if LSPCON is present on this port
2833  */
2834 bool
2835 intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
2836                              enum port port)
2837 {
2838         const struct intel_bios_encoder_data *devdata =
2839                 i915->vbt.ddi_port_info[port].devdata;
2840
2841         return HAS_LSPCON(i915) && devdata && devdata->child.lspcon;
2842 }
2843
2844 /**
2845  * intel_bios_is_lane_reversal_needed - if lane reversal needed on port
2846  * @i915:       i915 device instance
2847  * @port:       port to check
2848  *
2849  * Return true if port requires lane reversal
2850  */
2851 bool
2852 intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
2853                                    enum port port)
2854 {
2855         const struct intel_bios_encoder_data *devdata =
2856                 i915->vbt.ddi_port_info[port].devdata;
2857
2858         return devdata && devdata->child.lane_reversal;
2859 }
2860
2861 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *i915,
2862                                    enum port port)
2863 {
2864         const struct ddi_vbt_port_info *info =
2865                 &i915->vbt.ddi_port_info[port];
2866         enum aux_ch aux_ch;
2867
2868         if (!info->alternate_aux_channel) {
2869                 aux_ch = (enum aux_ch)port;
2870
2871                 drm_dbg_kms(&i915->drm,
2872                             "using AUX %c for port %c (platform default)\n",
2873                             aux_ch_name(aux_ch), port_name(port));
2874                 return aux_ch;
2875         }
2876
2877         /*
2878          * RKL/DG1 VBT uses PHY based mapping. Combo PHYs A,B,C,D
2879          * map to DDI A,B,TC1,TC2 respectively.
2880          *
2881          * ADL-S VBT uses PHY based mapping. Combo PHYs A,B,C,D,E
2882          * map to DDI A,TC1,TC2,TC3,TC4 respectively.
2883          */
2884         switch (info->alternate_aux_channel) {
2885         case DP_AUX_A:
2886                 aux_ch = AUX_CH_A;
2887                 break;
2888         case DP_AUX_B:
2889                 if (IS_ALDERLAKE_S(i915))
2890                         aux_ch = AUX_CH_USBC1;
2891                 else
2892                         aux_ch = AUX_CH_B;
2893                 break;
2894         case DP_AUX_C:
2895                 if (IS_ALDERLAKE_S(i915))
2896                         aux_ch = AUX_CH_USBC2;
2897                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2898                         aux_ch = AUX_CH_USBC1;
2899                 else
2900                         aux_ch = AUX_CH_C;
2901                 break;
2902         case DP_AUX_D:
2903                 if (DISPLAY_VER(i915) == 13)
2904                         aux_ch = AUX_CH_D_XELPD;
2905                 else if (IS_ALDERLAKE_S(i915))
2906                         aux_ch = AUX_CH_USBC3;
2907                 else if (IS_DG1(i915) || IS_ROCKETLAKE(i915))
2908                         aux_ch = AUX_CH_USBC2;
2909                 else
2910                         aux_ch = AUX_CH_D;
2911                 break;
2912         case DP_AUX_E:
2913                 if (DISPLAY_VER(i915) == 13)
2914                         aux_ch = AUX_CH_E_XELPD;
2915                 else if (IS_ALDERLAKE_S(i915))
2916                         aux_ch = AUX_CH_USBC4;
2917                 else
2918                         aux_ch = AUX_CH_E;
2919                 break;
2920         case DP_AUX_F:
2921                 if (DISPLAY_VER(i915) == 13)
2922                         aux_ch = AUX_CH_USBC1;
2923                 else
2924                         aux_ch = AUX_CH_F;
2925                 break;
2926         case DP_AUX_G:
2927                 if (DISPLAY_VER(i915) == 13)
2928                         aux_ch = AUX_CH_USBC2;
2929                 else
2930                         aux_ch = AUX_CH_G;
2931                 break;
2932         case DP_AUX_H:
2933                 if (DISPLAY_VER(i915) == 13)
2934                         aux_ch = AUX_CH_USBC3;
2935                 else
2936                         aux_ch = AUX_CH_H;
2937                 break;
2938         case DP_AUX_I:
2939                 if (DISPLAY_VER(i915) == 13)
2940                         aux_ch = AUX_CH_USBC4;
2941                 else
2942                         aux_ch = AUX_CH_I;
2943                 break;
2944         default:
2945                 MISSING_CASE(info->alternate_aux_channel);
2946                 aux_ch = AUX_CH_A;
2947                 break;
2948         }
2949
2950         drm_dbg_kms(&i915->drm, "using AUX %c for port %c (VBT)\n",
2951                     aux_ch_name(aux_ch), port_name(port));
2952
2953         return aux_ch;
2954 }
2955
2956 int intel_bios_max_tmds_clock(struct intel_encoder *encoder)
2957 {
2958         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2959
2960         return i915->vbt.ddi_port_info[encoder->port].max_tmds_clock;
2961 }
2962
2963 int intel_bios_hdmi_level_shift(struct intel_encoder *encoder)
2964 {
2965         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2966         const struct ddi_vbt_port_info *info =
2967                 &i915->vbt.ddi_port_info[encoder->port];
2968
2969         return info->hdmi_level_shift_set ? info->hdmi_level_shift : -1;
2970 }
2971
2972 int intel_bios_encoder_dp_boost_level(const struct intel_bios_encoder_data *devdata)
2973 {
2974         if (!devdata || devdata->i915->vbt.version < 196 || !devdata->child.iboost)
2975                 return 0;
2976
2977         return translate_iboost(devdata->child.dp_iboost_level);
2978 }
2979
2980 int intel_bios_encoder_hdmi_boost_level(const struct intel_bios_encoder_data *devdata)
2981 {
2982         if (!devdata || devdata->i915->vbt.version < 196 || !devdata->child.iboost)
2983                 return 0;
2984
2985         return translate_iboost(devdata->child.hdmi_iboost_level);
2986 }
2987
2988 int intel_bios_dp_max_link_rate(struct intel_encoder *encoder)
2989 {
2990         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2991
2992         return i915->vbt.ddi_port_info[encoder->port].dp_max_link_rate;
2993 }
2994
2995 int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
2996 {
2997         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2998
2999         return i915->vbt.ddi_port_info[encoder->port].alternate_ddc_pin;
3000 }
3001
3002 bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)
3003 {
3004         return devdata->i915->vbt.version >= 195 && devdata->child.dp_usb_type_c;
3005 }
3006
3007 bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devdata)
3008 {
3009         return devdata->i915->vbt.version >= 209 && devdata->child.tbt;
3010 }
3011
3012 const struct intel_bios_encoder_data *
3013 intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
3014 {
3015         return i915->vbt.ddi_port_info[port].devdata;
3016 }