drivers/video/hdmi.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   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, sub license,
   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
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 NON-INFRINGEMENT. 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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <drm/display/drm_dp.h>
  25 #include <linux/bitops.h>
  26 #include <linux/bug.h>
  27 #include <linux/errno.h>
  28 #include <linux/export.h>
  29 #include <linux/hdmi.h>
  30 #include <linux/string.h>
  31 #include <linux/device.h>
  32
  33 #define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
  34
  35 static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
  36 {
  37         u8 csum = 0;
  38         size_t i;
  39
  40         /* compute checksum */
  41         for (i = 0; i < size; i++)
  42                 csum += ptr[i];
  43
  44         return 256 - csum;
  45 }
  46
  47 static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
  48 {
  49         u8 *ptr = buffer;
  50
  51         ptr[3] = hdmi_infoframe_checksum(buffer, size);
  52 }
  53
  54 /**
  55  * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
  56  * @frame: HDMI AVI infoframe
  57  */
  58 void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
  59 {
  60         memset(frame, 0, sizeof(*frame));
  61
  62         frame->type = HDMI_INFOFRAME_TYPE_AVI;
  63         frame->version = 2;
  64         frame->length = HDMI_AVI_INFOFRAME_SIZE;
  65 }
  66 EXPORT_SYMBOL(hdmi_avi_infoframe_init);
  67
  68 static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
  69 {
  70         if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
  71             frame->version != 2 ||
  72             frame->length != HDMI_AVI_INFOFRAME_SIZE)
  73                 return -EINVAL;
  74
  75         if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
  76                 return -EINVAL;
  77
  78         return 0;
  79 }
  80
  81 /**
  82  * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
  83  * @frame: HDMI AVI infoframe
  84  *
  85  * Validates that the infoframe is consistent and updates derived fields
  86  * (eg. length) based on other fields.
  87  *
  88  * Returns 0 on success or a negative error code on failure.
  89  */
  90 int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
  91 {
  92         return hdmi_avi_infoframe_check_only(frame);
  93 }
  94 EXPORT_SYMBOL(hdmi_avi_infoframe_check);
  95
  96 /**
  97  * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
  98  * @frame: HDMI AVI infoframe
  99  * @buffer: destination buffer
 100  * @size: size of buffer
 101  *
 102  * Packs the information contained in the @frame structure into a binary
 103  * representation that can be written into the corresponding controller
 104  * registers. Also computes the checksum as required by section 5.3.5 of
 105  * the HDMI 1.4 specification.
 106  *
 107  * Returns the number of bytes packed into the binary buffer or a negative
 108  * error code on failure.
 109  */
 110 ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
 111                                      void *buffer, size_t size)
 112 {
 113         u8 *ptr = buffer;
 114         size_t length;
 115         int ret;
 116
 117         ret = hdmi_avi_infoframe_check_only(frame);
 118         if (ret)
 119                 return ret;
 120
 121         length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
 122
 123         if (size < length)
 124                 return -ENOSPC;
 125
 126         memset(buffer, 0, size);
 127
 128         ptr[0] = frame->type;
 129         ptr[1] = frame->version;
 130         ptr[2] = frame->length;
 131         ptr[3] = 0; /* checksum */
 132
 133         /* start infoframe payload */
 134         ptr += HDMI_INFOFRAME_HEADER_SIZE;
 135
 136         ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
 137
 138         /*
 139          * Data byte 1, bit 4 has to be set if we provide the active format
 140          * aspect ratio
 141          */
 142         if (frame->active_aspect & 0xf)
 143                 ptr[0] |= BIT(4);
 144
 145         /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
 146         if (frame->top_bar || frame->bottom_bar)
 147                 ptr[0] |= BIT(3);
 148
 149         if (frame->left_bar || frame->right_bar)
 150                 ptr[0] |= BIT(2);
 151
 152         ptr[1] = ((frame->colorimetry & 0x3) << 6) |
 153                  ((frame->picture_aspect & 0x3) << 4) |
 154                  (frame->active_aspect & 0xf);
 155
 156         ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
 157                  ((frame->quantization_range & 0x3) << 2) |
 158                  (frame->nups & 0x3);
 159
 160         if (frame->itc)
 161                 ptr[2] |= BIT(7);
 162
 163         ptr[3] = frame->video_code & 0x7f;
 164
 165         ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
 166                  ((frame->content_type & 0x3) << 4) |
 167                  (frame->pixel_repeat & 0xf);
 168
 169         ptr[5] = frame->top_bar & 0xff;
 170         ptr[6] = (frame->top_bar >> 8) & 0xff;
 171         ptr[7] = frame->bottom_bar & 0xff;
 172         ptr[8] = (frame->bottom_bar >> 8) & 0xff;
 173         ptr[9] = frame->left_bar & 0xff;
 174         ptr[10] = (frame->left_bar >> 8) & 0xff;
 175         ptr[11] = frame->right_bar & 0xff;
 176         ptr[12] = (frame->right_bar >> 8) & 0xff;
 177
 178         hdmi_infoframe_set_checksum(buffer, length);
 179
 180         return length;
 181 }
 182 EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
 183
 184 /**
 185  * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
 186  *                             and write it to binary buffer
 187  * @frame: HDMI AVI infoframe
 188  * @buffer: destination buffer
 189  * @size: size of buffer
 190  *
 191  * Validates that the infoframe is consistent and updates derived fields
 192  * (eg. length) based on other fields, after which it packs the information
 193  * contained in the @frame structure into a binary representation that
 194  * can be written into the corresponding controller registers. This function
 195  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 196  * specification.
 197  *
 198  * Returns the number of bytes packed into the binary buffer or a negative
 199  * error code on failure.
 200  */
 201 ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
 202                                 void *buffer, size_t size)
 203 {
 204         int ret;
 205
 206         ret = hdmi_avi_infoframe_check(frame);
 207         if (ret)
 208                 return ret;
 209
 210         return hdmi_avi_infoframe_pack_only(frame, buffer, size);
 211 }
 212 EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
 213
 214 /**
 215  * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
 216  * @frame: HDMI SPD infoframe
 217  * @vendor: vendor string
 218  * @product: product string
 219  *
 220  * Returns 0 on success or a negative error code on failure.
 221  */
 222 int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
 223                             const char *vendor, const char *product)
 224 {
 225         size_t len;
 226
 227         memset(frame, 0, sizeof(*frame));
 228
 229         frame->type = HDMI_INFOFRAME_TYPE_SPD;
 230         frame->version = 1;
 231         frame->length = HDMI_SPD_INFOFRAME_SIZE;
 232
 233         len = strlen(vendor);
 234         memcpy(frame->vendor, vendor, min(len, sizeof(frame->vendor)));
 235         len = strlen(product);
 236         memcpy(frame->product, product, min(len, sizeof(frame->product)));
 237
 238         return 0;
 239 }
 240 EXPORT_SYMBOL(hdmi_spd_infoframe_init);
 241
 242 static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
 243 {
 244         if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
 245             frame->version != 1 ||
 246             frame->length != HDMI_SPD_INFOFRAME_SIZE)
 247                 return -EINVAL;
 248
 249         return 0;
 250 }
 251
 252 /**
 253  * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
 254  * @frame: HDMI SPD infoframe
 255  *
 256  * Validates that the infoframe is consistent and updates derived fields
 257  * (eg. length) based on other fields.
 258  *
 259  * Returns 0 on success or a negative error code on failure.
 260  */
 261 int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
 262 {
 263         return hdmi_spd_infoframe_check_only(frame);
 264 }
 265 EXPORT_SYMBOL(hdmi_spd_infoframe_check);
 266
 267 /**
 268  * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
 269  * @frame: HDMI SPD infoframe
 270  * @buffer: destination buffer
 271  * @size: size of buffer
 272  *
 273  * Packs the information contained in the @frame structure into a binary
 274  * representation that can be written into the corresponding controller
 275  * registers. Also computes the checksum as required by section 5.3.5 of
 276  * the HDMI 1.4 specification.
 277  *
 278  * Returns the number of bytes packed into the binary buffer or a negative
 279  * error code on failure.
 280  */
 281 ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
 282                                      void *buffer, size_t size)
 283 {
 284         u8 *ptr = buffer;
 285         size_t length;
 286         int ret;
 287
 288         ret = hdmi_spd_infoframe_check_only(frame);
 289         if (ret)
 290                 return ret;
 291
 292         length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
 293
 294         if (size < length)
 295                 return -ENOSPC;
 296
 297         memset(buffer, 0, size);
 298
 299         ptr[0] = frame->type;
 300         ptr[1] = frame->version;
 301         ptr[2] = frame->length;
 302         ptr[3] = 0; /* checksum */
 303
 304         /* start infoframe payload */
 305         ptr += HDMI_INFOFRAME_HEADER_SIZE;
 306
 307         memcpy(ptr, frame->vendor, sizeof(frame->vendor));
 308         memcpy(ptr + 8, frame->product, sizeof(frame->product));
 309
 310         ptr[24] = frame->sdi;
 311
 312         hdmi_infoframe_set_checksum(buffer, length);
 313
 314         return length;
 315 }
 316 EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
 317
 318 /**
 319  * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
 320  *                             and write it to binary buffer
 321  * @frame: HDMI SPD infoframe
 322  * @buffer: destination buffer
 323  * @size: size of buffer
 324  *
 325  * Validates that the infoframe is consistent and updates derived fields
 326  * (eg. length) based on other fields, after which it packs the information
 327  * contained in the @frame structure into a binary representation that
 328  * can be written into the corresponding controller registers. This function
 329  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 330  * specification.
 331  *
 332  * Returns the number of bytes packed into the binary buffer or a negative
 333  * error code on failure.
 334  */
 335 ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
 336                                 void *buffer, size_t size)
 337 {
 338         int ret;
 339
 340         ret = hdmi_spd_infoframe_check(frame);
 341         if (ret)
 342                 return ret;
 343
 344         return hdmi_spd_infoframe_pack_only(frame, buffer, size);
 345 }
 346 EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
 347
 348 /**
 349  * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
 350  * @frame: HDMI audio infoframe
 351  *
 352  * Returns 0 on success or a negative error code on failure.
 353  */
 354 int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
 355 {
 356         memset(frame, 0, sizeof(*frame));
 357
 358         frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
 359         frame->version = 1;
 360         frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
 361
 362         return 0;
 363 }
 364 EXPORT_SYMBOL(hdmi_audio_infoframe_init);
 365
 366 static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
 367 {
 368         if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
 369             frame->version != 1 ||
 370             frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
 371                 return -EINVAL;
 372
 373         return 0;
 374 }
 375
 376 /**
 377  * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
 378  * @frame: HDMI audio infoframe
 379  *
 380  * Validates that the infoframe is consistent and updates derived fields
 381  * (eg. length) based on other fields.
 382  *
 383  * Returns 0 on success or a negative error code on failure.
 384  */
 385 int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame)
 386 {
 387         return hdmi_audio_infoframe_check_only(frame);
 388 }
 389 EXPORT_SYMBOL(hdmi_audio_infoframe_check);
 390
 391 static void
 392 hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame,
 393                                   u8 *buffer)
 394 {
 395         u8 channels;
 396
 397         if (frame->channels >= 2)
 398                 channels = frame->channels - 1;
 399         else
 400                 channels = 0;
 401
 402         buffer[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
 403         buffer[1] = ((frame->sample_frequency & 0x7) << 2) |
 404                  (frame->sample_size & 0x3);
 405         buffer[2] = frame->coding_type_ext & 0x1f;
 406         buffer[3] = frame->channel_allocation;
 407         buffer[4] = (frame->level_shift_value & 0xf) << 3;
 408
 409         if (frame->downmix_inhibit)
 410                 buffer[4] |= BIT(7);
 411 }
 412
 413 /**
 414  * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
 415  * @frame: HDMI audio infoframe
 416  * @buffer: destination buffer
 417  * @size: size of buffer
 418  *
 419  * Packs the information contained in the @frame structure into a binary
 420  * representation that can be written into the corresponding controller
 421  * registers. Also computes the checksum as required by section 5.3.5 of
 422  * the HDMI 1.4 specification.
 423  *
 424  * Returns the number of bytes packed into the binary buffer or a negative
 425  * error code on failure.
 426  */
 427 ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
 428                                        void *buffer, size_t size)
 429 {
 430         u8 *ptr = buffer;
 431         size_t length;
 432         int ret;
 433
 434         ret = hdmi_audio_infoframe_check_only(frame);
 435         if (ret)
 436                 return ret;
 437
 438         length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
 439
 440         if (size < length)
 441                 return -ENOSPC;
 442
 443         memset(buffer, 0, size);
 444
 445         ptr[0] = frame->type;
 446         ptr[1] = frame->version;
 447         ptr[2] = frame->length;
 448         ptr[3] = 0; /* checksum */
 449
 450         hdmi_audio_infoframe_pack_payload(frame,
 451                                           ptr + HDMI_INFOFRAME_HEADER_SIZE);
 452
 453         hdmi_infoframe_set_checksum(buffer, length);
 454
 455         return length;
 456 }
 457 EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
 458
 459 /**
 460  * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
 461  *                               and write it to binary buffer
 462  * @frame: HDMI Audio infoframe
 463  * @buffer: destination buffer
 464  * @size: size of buffer
 465  *
 466  * Validates that the infoframe is consistent and updates derived fields
 467  * (eg. length) based on other fields, after which it packs the information
 468  * contained in the @frame structure into a binary representation that
 469  * can be written into the corresponding controller registers. This function
 470  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 471  * specification.
 472  *
 473  * Returns the number of bytes packed into the binary buffer or a negative
 474  * error code on failure.
 475  */
 476 ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
 477                                   void *buffer, size_t size)
 478 {
 479         int ret;
 480
 481         ret = hdmi_audio_infoframe_check(frame);
 482         if (ret)
 483                 return ret;
 484
 485         return hdmi_audio_infoframe_pack_only(frame, buffer, size);
 486 }
 487 EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
 488
 489 /**
 490  * hdmi_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for DisplayPort
 491  *
 492  * @frame:      HDMI Audio infoframe
 493  * @sdp:        Secondary data packet for DisplayPort.
 494  * @dp_version: DisplayPort version to be encoded in the header
 495  *
 496  * Packs a HDMI Audio Infoframe to be sent over DisplayPort. This function
 497  * fills the secondary data packet to be used for DisplayPort.
 498  *
 499  * Return: Number of total written bytes or a negative errno on failure.
 500  */
 501 ssize_t
 502 hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
 503                                  struct dp_sdp *sdp, u8 dp_version)
 504 {
 505         int ret;
 506
 507         ret = hdmi_audio_infoframe_check(frame);
 508         if (ret)
 509                 return ret;
 510
 511         memset(sdp->db, 0, sizeof(sdp->db));
 512
 513         /* Secondary-data packet header */
 514         sdp->sdp_header.HB0 = 0;
 515         sdp->sdp_header.HB1 = frame->type;
 516         sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2;
 517         sdp->sdp_header.HB3 = (dp_version & 0x3f) << 2;
 518
 519         hdmi_audio_infoframe_pack_payload(frame, sdp->db);
 520
 521         /* Return size =  frame length + four HB for sdp_header */
 522         return frame->length + 4;
 523 }
 524 EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp);
 525
 526 /**
 527  * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
 528  * @frame: HDMI vendor infoframe
 529  *
 530  * Returns 0 on success or a negative error code on failure.
 531  */
 532 int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
 533 {
 534         memset(frame, 0, sizeof(*frame));
 535
 536         frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
 537         frame->version = 1;
 538
 539         frame->oui = HDMI_IEEE_OUI;
 540
 541         /*
 542          * 0 is a valid value for s3d_struct, so we use a special "not set"
 543          * value
 544          */
 545         frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
 546         frame->length = HDMI_VENDOR_INFOFRAME_SIZE;
 547
 548         return 0;
 549 }
 550 EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
 551
 552 static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
 553 {
 554         /* for side by side (half) we also need to provide 3D_Ext_Data */
 555         if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
 556                 return 6;
 557         else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
 558                 return 5;
 559         else
 560                 return 4;
 561 }
 562
 563 static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
 564 {
 565         if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
 566             frame->version != 1 ||
 567             frame->oui != HDMI_IEEE_OUI)
 568                 return -EINVAL;
 569
 570         /* only one of those can be supplied */
 571         if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
 572                 return -EINVAL;
 573
 574         if (frame->length != hdmi_vendor_infoframe_length(frame))
 575                 return -EINVAL;
 576
 577         return 0;
 578 }
 579
 580 /**
 581  * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
 582  * @frame: HDMI infoframe
 583  *
 584  * Validates that the infoframe is consistent and updates derived fields
 585  * (eg. length) based on other fields.
 586  *
 587  * Returns 0 on success or a negative error code on failure.
 588  */
 589 int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
 590 {
 591         frame->length = hdmi_vendor_infoframe_length(frame);
 592
 593         return hdmi_vendor_infoframe_check_only(frame);
 594 }
 595 EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
 596
 597 /**
 598  * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
 599  * @frame: HDMI infoframe
 600  * @buffer: destination buffer
 601  * @size: size of buffer
 602  *
 603  * Packs the information contained in the @frame structure into a binary
 604  * representation that can be written into the corresponding controller
 605  * registers. Also computes the checksum as required by section 5.3.5 of
 606  * the HDMI 1.4 specification.
 607  *
 608  * Returns the number of bytes packed into the binary buffer or a negative
 609  * error code on failure.
 610  */
 611 ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
 612                                         void *buffer, size_t size)
 613 {
 614         u8 *ptr = buffer;
 615         size_t length;
 616         int ret;
 617
 618         ret = hdmi_vendor_infoframe_check_only(frame);
 619         if (ret)
 620                 return ret;
 621
 622         length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
 623
 624         if (size < length)
 625                 return -ENOSPC;
 626
 627         memset(buffer, 0, size);
 628
 629         ptr[0] = frame->type;
 630         ptr[1] = frame->version;
 631         ptr[2] = frame->length;
 632         ptr[3] = 0; /* checksum */
 633
 634         /* HDMI OUI */
 635         ptr[4] = 0x03;
 636         ptr[5] = 0x0c;
 637         ptr[6] = 0x00;
 638
 639         if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
 640                 ptr[7] = 0x2 << 5;      /* video format */
 641                 ptr[8] = (frame->s3d_struct & 0xf) << 4;
 642                 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
 643                         ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
 644         } else if (frame->vic) {
 645                 ptr[7] = 0x1 << 5;      /* video format */
 646                 ptr[8] = frame->vic;
 647         } else {
 648                 ptr[7] = 0x0 << 5;      /* video format */
 649         }
 650
 651         hdmi_infoframe_set_checksum(buffer, length);
 652
 653         return length;
 654 }
 655 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
 656
 657 /**
 658  * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
 659  *                                and write it to binary buffer
 660  * @frame: HDMI Vendor infoframe
 661  * @buffer: destination buffer
 662  * @size: size of buffer
 663  *
 664  * Validates that the infoframe is consistent and updates derived fields
 665  * (eg. length) based on other fields, after which it packs the information
 666  * contained in the @frame structure into a binary representation that
 667  * can be written into the corresponding controller registers. This function
 668  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 669  * specification.
 670  *
 671  * Returns the number of bytes packed into the binary buffer or a negative
 672  * error code on failure.
 673  */
 674 ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 675                                    void *buffer, size_t size)
 676 {
 677         int ret;
 678
 679         ret = hdmi_vendor_infoframe_check(frame);
 680         if (ret)
 681                 return ret;
 682
 683         return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
 684 }
 685 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
 686
 687 static int
 688 hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
 689 {
 690         if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
 691             frame->any.version != 1)
 692                 return -EINVAL;
 693
 694         return 0;
 695 }
 696
 697 /**
 698  * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
 699  * mastering infoframe
 700  * @frame: HDMI DRM infoframe
 701  *
 702  * Returns 0 on success or a negative error code on failure.
 703  */
 704 int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
 705 {
 706         memset(frame, 0, sizeof(*frame));
 707
 708         frame->type = HDMI_INFOFRAME_TYPE_DRM;
 709         frame->version = 1;
 710         frame->length = HDMI_DRM_INFOFRAME_SIZE;
 711
 712         return 0;
 713 }
 714 EXPORT_SYMBOL(hdmi_drm_infoframe_init);
 715
 716 static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
 717 {
 718         if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
 719             frame->version != 1)
 720                 return -EINVAL;
 721
 722         if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
 723                 return -EINVAL;
 724
 725         return 0;
 726 }
 727
 728 /**
 729  * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
 730  * @frame: HDMI DRM infoframe
 731  *
 732  * Validates that the infoframe is consistent.
 733  * Returns 0 on success or a negative error code on failure.
 734  */
 735 int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
 736 {
 737         return hdmi_drm_infoframe_check_only(frame);
 738 }
 739 EXPORT_SYMBOL(hdmi_drm_infoframe_check);
 740
 741 /**
 742  * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
 743  * @frame: HDMI DRM infoframe
 744  * @buffer: destination buffer
 745  * @size: size of buffer
 746  *
 747  * Packs the information contained in the @frame structure into a binary
 748  * representation that can be written into the corresponding controller
 749  * registers. Also computes the checksum as required by section 5.3.5 of
 750  * the HDMI 1.4 specification.
 751  *
 752  * Returns the number of bytes packed into the binary buffer or a negative
 753  * error code on failure.
 754  */
 755 ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
 756                                      void *buffer, size_t size)
 757 {
 758         u8 *ptr = buffer;
 759         size_t length;
 760         int i;
 761
 762         length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
 763
 764         if (size < length)
 765                 return -ENOSPC;
 766
 767         memset(buffer, 0, size);
 768
 769         ptr[0] = frame->type;
 770         ptr[1] = frame->version;
 771         ptr[2] = frame->length;
 772         ptr[3] = 0; /* checksum */
 773
 774         /* start infoframe payload */
 775         ptr += HDMI_INFOFRAME_HEADER_SIZE;
 776
 777         *ptr++ = frame->eotf;
 778         *ptr++ = frame->metadata_type;
 779
 780         for (i = 0; i < 3; i++) {
 781                 *ptr++ = frame->display_primaries[i].x;
 782                 *ptr++ = frame->display_primaries[i].x >> 8;
 783                 *ptr++ = frame->display_primaries[i].y;
 784                 *ptr++ = frame->display_primaries[i].y >> 8;
 785         }
 786
 787         *ptr++ = frame->white_point.x;
 788         *ptr++ = frame->white_point.x >> 8;
 789
 790         *ptr++ = frame->white_point.y;
 791         *ptr++ = frame->white_point.y >> 8;
 792
 793         *ptr++ = frame->max_display_mastering_luminance;
 794         *ptr++ = frame->max_display_mastering_luminance >> 8;
 795
 796         *ptr++ = frame->min_display_mastering_luminance;
 797         *ptr++ = frame->min_display_mastering_luminance >> 8;
 798
 799         *ptr++ = frame->max_cll;
 800         *ptr++ = frame->max_cll >> 8;
 801
 802         *ptr++ = frame->max_fall;
 803         *ptr++ = frame->max_fall >> 8;
 804
 805         hdmi_infoframe_set_checksum(buffer, length);
 806
 807         return length;
 808 }
 809 EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
 810
 811 /**
 812  * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
 813  *                             and write it to binary buffer
 814  * @frame: HDMI DRM infoframe
 815  * @buffer: destination buffer
 816  * @size: size of buffer
 817  *
 818  * Validates that the infoframe is consistent and updates derived fields
 819  * (eg. length) based on other fields, after which it packs the information
 820  * contained in the @frame structure into a binary representation that
 821  * can be written into the corresponding controller registers. This function
 822  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 823  * specification.
 824  *
 825  * Returns the number of bytes packed into the binary buffer or a negative
 826  * error code on failure.
 827  */
 828 ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
 829                                 void *buffer, size_t size)
 830 {
 831         int ret;
 832
 833         ret = hdmi_drm_infoframe_check(frame);
 834         if (ret)
 835                 return ret;
 836
 837         return hdmi_drm_infoframe_pack_only(frame, buffer, size);
 838 }
 839 EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
 840
 841 /*
 842  * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
 843  */
 844 static int
 845 hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
 846 {
 847         int ret;
 848
 849         ret = hdmi_vendor_any_infoframe_check_only(frame);
 850         if (ret)
 851                 return ret;
 852
 853         /* we only know about HDMI vendor infoframes */
 854         if (frame->any.oui != HDMI_IEEE_OUI)
 855                 return -EINVAL;
 856
 857         return hdmi_vendor_infoframe_check(&frame->hdmi);
 858 }
 859
 860 /*
 861  * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
 862  */
 863 static ssize_t
 864 hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
 865                                     void *buffer, size_t size)
 866 {
 867         int ret;
 868
 869         ret = hdmi_vendor_any_infoframe_check_only(frame);
 870         if (ret)
 871                 return ret;
 872
 873         /* we only know about HDMI vendor infoframes */
 874         if (frame->any.oui != HDMI_IEEE_OUI)
 875                 return -EINVAL;
 876
 877         return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
 878 }
 879
 880 /*
 881  * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
 882  *                                    and write it to binary buffer
 883  */
 884 static ssize_t
 885 hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
 886                                void *buffer, size_t size)
 887 {
 888         int ret;
 889
 890         ret = hdmi_vendor_any_infoframe_check(frame);
 891         if (ret)
 892                 return ret;
 893
 894         return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
 895 }
 896
 897 /**
 898  * hdmi_infoframe_check() - check a HDMI infoframe
 899  * @frame: HDMI infoframe
 900  *
 901  * Validates that the infoframe is consistent and updates derived fields
 902  * (eg. length) based on other fields.
 903  *
 904  * Returns 0 on success or a negative error code on failure.
 905  */
 906 int
 907 hdmi_infoframe_check(union hdmi_infoframe *frame)
 908 {
 909         switch (frame->any.type) {
 910         case HDMI_INFOFRAME_TYPE_AVI:
 911                 return hdmi_avi_infoframe_check(&frame->avi);
 912         case HDMI_INFOFRAME_TYPE_SPD:
 913                 return hdmi_spd_infoframe_check(&frame->spd);
 914         case HDMI_INFOFRAME_TYPE_AUDIO:
 915                 return hdmi_audio_infoframe_check(&frame->audio);
 916         case HDMI_INFOFRAME_TYPE_VENDOR:
 917                 return hdmi_vendor_any_infoframe_check(&frame->vendor);
 918         default:
 919                 WARN(1, "Bad infoframe type %d\n", frame->any.type);
 920                 return -EINVAL;
 921         }
 922 }
 923 EXPORT_SYMBOL(hdmi_infoframe_check);
 924
 925 /**
 926  * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
 927  * @frame: HDMI infoframe
 928  * @buffer: destination buffer
 929  * @size: size of buffer
 930  *
 931  * Packs the information contained in the @frame structure into a binary
 932  * representation that can be written into the corresponding controller
 933  * registers. Also computes the checksum as required by section 5.3.5 of
 934  * the HDMI 1.4 specification.
 935  *
 936  * Returns the number of bytes packed into the binary buffer or a negative
 937  * error code on failure.
 938  */
 939 ssize_t
 940 hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
 941 {
 942         ssize_t length;
 943
 944         switch (frame->any.type) {
 945         case HDMI_INFOFRAME_TYPE_AVI:
 946                 length = hdmi_avi_infoframe_pack_only(&frame->avi,
 947                                                       buffer, size);
 948                 break;
 949         case HDMI_INFOFRAME_TYPE_DRM:
 950                 length = hdmi_drm_infoframe_pack_only(&frame->drm,
 951                                                       buffer, size);
 952                 break;
 953         case HDMI_INFOFRAME_TYPE_SPD:
 954                 length = hdmi_spd_infoframe_pack_only(&frame->spd,
 955                                                       buffer, size);
 956                 break;
 957         case HDMI_INFOFRAME_TYPE_AUDIO:
 958                 length = hdmi_audio_infoframe_pack_only(&frame->audio,
 959                                                         buffer, size);
 960                 break;
 961         case HDMI_INFOFRAME_TYPE_VENDOR:
 962                 length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
 963                                                              buffer, size);
 964                 break;
 965         default:
 966                 WARN(1, "Bad infoframe type %d\n", frame->any.type);
 967                 length = -EINVAL;
 968         }
 969
 970         return length;
 971 }
 972 EXPORT_SYMBOL(hdmi_infoframe_pack_only);
 973
 974 /**
 975  * hdmi_infoframe_pack() - check a HDMI infoframe,
 976  *                         and write it to binary buffer
 977  * @frame: HDMI infoframe
 978  * @buffer: destination buffer
 979  * @size: size of buffer
 980  *
 981  * Validates that the infoframe is consistent and updates derived fields
 982  * (eg. length) based on other fields, after which it packs the information
 983  * contained in the @frame structure into a binary representation that
 984  * can be written into the corresponding controller registers. This function
 985  * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 986  * specification.
 987  *
 988  * Returns the number of bytes packed into the binary buffer or a negative
 989  * error code on failure.
 990  */
 991 ssize_t
 992 hdmi_infoframe_pack(union hdmi_infoframe *frame,
 993                     void *buffer, size_t size)
 994 {
 995         ssize_t length;
 996
 997         switch (frame->any.type) {
 998         case HDMI_INFOFRAME_TYPE_AVI:
 999                 length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
1000                 break;
1001         case HDMI_INFOFRAME_TYPE_DRM:
1002                 length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
1003                 break;
1004         case HDMI_INFOFRAME_TYPE_SPD:
1005                 length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
1006                 break;
1007         case HDMI_INFOFRAME_TYPE_AUDIO:
1008                 length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
1009                 break;
1010         case HDMI_INFOFRAME_TYPE_VENDOR:
1011                 length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
1012                                                         buffer, size);
1013                 break;
1014         default:
1015                 WARN(1, "Bad infoframe type %d\n", frame->any.type);
1016                 length = -EINVAL;
1017         }
1018
1019         return length;
1020 }
1021 EXPORT_SYMBOL(hdmi_infoframe_pack);
1022
1023 static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
1024 {
1025         if (type < 0x80 || type > 0x9f)
1026                 return "Invalid";
1027         switch (type) {
1028         case HDMI_INFOFRAME_TYPE_VENDOR:
1029                 return "Vendor";
1030         case HDMI_INFOFRAME_TYPE_AVI:
1031                 return "Auxiliary Video Information (AVI)";
1032         case HDMI_INFOFRAME_TYPE_SPD:
1033                 return "Source Product Description (SPD)";
1034         case HDMI_INFOFRAME_TYPE_AUDIO:
1035                 return "Audio";
1036         case HDMI_INFOFRAME_TYPE_DRM:
1037                 return "Dynamic Range and Mastering";
1038         }
1039         return "Reserved";
1040 }
1041
1042 static void hdmi_infoframe_log_header(const char *level,
1043                                       struct device *dev,
1044                                       const struct hdmi_any_infoframe *frame)
1045 {
1046         hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
1047                 hdmi_infoframe_type_get_name(frame->type),
1048                 frame->version, frame->length);
1049 }
1050
1051 static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
1052 {
1053         switch (colorspace) {
1054         case HDMI_COLORSPACE_RGB:
1055                 return "RGB";
1056         case HDMI_COLORSPACE_YUV422:
1057                 return "YCbCr 4:2:2";
1058         case HDMI_COLORSPACE_YUV444:
1059                 return "YCbCr 4:4:4";
1060         case HDMI_COLORSPACE_YUV420:
1061                 return "YCbCr 4:2:0";
1062         case HDMI_COLORSPACE_RESERVED4:
1063                 return "Reserved (4)";
1064         case HDMI_COLORSPACE_RESERVED5:
1065                 return "Reserved (5)";
1066         case HDMI_COLORSPACE_RESERVED6:
1067                 return "Reserved (6)";
1068         case HDMI_COLORSPACE_IDO_DEFINED:
1069                 return "IDO Defined";
1070         }
1071         return "Invalid";
1072 }
1073
1074 static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
1075 {
1076         switch (scan_mode) {
1077         case HDMI_SCAN_MODE_NONE:
1078                 return "No Data";
1079         case HDMI_SCAN_MODE_OVERSCAN:
1080                 return "Overscan";
1081         case HDMI_SCAN_MODE_UNDERSCAN:
1082                 return "Underscan";
1083         case HDMI_SCAN_MODE_RESERVED:
1084                 return "Reserved";
1085         }
1086         return "Invalid";
1087 }
1088
1089 static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
1090 {
1091         switch (colorimetry) {
1092         case HDMI_COLORIMETRY_NONE:
1093                 return "No Data";
1094         case HDMI_COLORIMETRY_ITU_601:
1095                 return "ITU601";
1096         case HDMI_COLORIMETRY_ITU_709:
1097                 return "ITU709";
1098         case HDMI_COLORIMETRY_EXTENDED:
1099                 return "Extended";
1100         }
1101         return "Invalid";
1102 }
1103
1104 static const char *
1105 hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
1106 {
1107         switch (picture_aspect) {
1108         case HDMI_PICTURE_ASPECT_NONE:
1109                 return "No Data";
1110         case HDMI_PICTURE_ASPECT_4_3:
1111                 return "4:3";
1112         case HDMI_PICTURE_ASPECT_16_9:
1113                 return "16:9";
1114         case HDMI_PICTURE_ASPECT_64_27:
1115                 return "64:27";
1116         case HDMI_PICTURE_ASPECT_256_135:
1117                 return "256:135";
1118         case HDMI_PICTURE_ASPECT_RESERVED:
1119                 return "Reserved";
1120         }
1121         return "Invalid";
1122 }
1123
1124 static const char *
1125 hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
1126 {
1127         if (active_aspect < 0 || active_aspect > 0xf)
1128                 return "Invalid";
1129
1130         switch (active_aspect) {
1131         case HDMI_ACTIVE_ASPECT_16_9_TOP:
1132                 return "16:9 Top";
1133         case HDMI_ACTIVE_ASPECT_14_9_TOP:
1134                 return "14:9 Top";
1135         case HDMI_ACTIVE_ASPECT_16_9_CENTER:
1136                 return "16:9 Center";
1137         case HDMI_ACTIVE_ASPECT_PICTURE:
1138                 return "Same as Picture";
1139         case HDMI_ACTIVE_ASPECT_4_3:
1140                 return "4:3";
1141         case HDMI_ACTIVE_ASPECT_16_9:
1142                 return "16:9";
1143         case HDMI_ACTIVE_ASPECT_14_9:
1144                 return "14:9";
1145         case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
1146                 return "4:3 SP 14:9";
1147         case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
1148                 return "16:9 SP 14:9";
1149         case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
1150                 return "16:9 SP 4:3";
1151         }
1152         return "Reserved";
1153 }
1154
1155 static const char *
1156 hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
1157 {
1158         switch (ext_col) {
1159         case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
1160                 return "xvYCC 601";
1161         case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
1162                 return "xvYCC 709";
1163         case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
1164                 return "sYCC 601";
1165         case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
1166                 return "opYCC 601";
1167         case HDMI_EXTENDED_COLORIMETRY_OPRGB:
1168                 return "opRGB";
1169         case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
1170                 return "BT.2020 Constant Luminance";
1171         case HDMI_EXTENDED_COLORIMETRY_BT2020:
1172                 return "BT.2020";
1173         case HDMI_EXTENDED_COLORIMETRY_RESERVED:
1174                 return "Reserved";
1175         }
1176         return "Invalid";
1177 }
1178
1179 static const char *
1180 hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
1181 {
1182         switch (qrange) {
1183         case HDMI_QUANTIZATION_RANGE_DEFAULT:
1184                 return "Default";
1185         case HDMI_QUANTIZATION_RANGE_LIMITED:
1186                 return "Limited";
1187         case HDMI_QUANTIZATION_RANGE_FULL:
1188                 return "Full";
1189         case HDMI_QUANTIZATION_RANGE_RESERVED:
1190                 return "Reserved";
1191         }
1192         return "Invalid";
1193 }
1194
1195 static const char *hdmi_nups_get_name(enum hdmi_nups nups)
1196 {
1197         switch (nups) {
1198         case HDMI_NUPS_UNKNOWN:
1199                 return "Unknown Non-uniform Scaling";
1200         case HDMI_NUPS_HORIZONTAL:
1201                 return "Horizontally Scaled";
1202         case HDMI_NUPS_VERTICAL:
1203                 return "Vertically Scaled";
1204         case HDMI_NUPS_BOTH:
1205                 return "Horizontally and Vertically Scaled";
1206         }
1207         return "Invalid";
1208 }
1209
1210 static const char *
1211 hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
1212 {
1213         switch (qrange) {
1214         case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
1215                 return "Limited";
1216         case HDMI_YCC_QUANTIZATION_RANGE_FULL:
1217                 return "Full";
1218         }
1219         return "Invalid";
1220 }
1221
1222 static const char *
1223 hdmi_content_type_get_name(enum hdmi_content_type content_type)
1224 {
1225         switch (content_type) {
1226         case HDMI_CONTENT_TYPE_GRAPHICS:
1227                 return "Graphics";
1228         case HDMI_CONTENT_TYPE_PHOTO:
1229                 return "Photo";
1230         case HDMI_CONTENT_TYPE_CINEMA:
1231                 return "Cinema";
1232         case HDMI_CONTENT_TYPE_GAME:
1233                 return "Game";
1234         }
1235         return "Invalid";
1236 }
1237
1238 static void hdmi_avi_infoframe_log(const char *level,
1239                                    struct device *dev,
1240                                    const struct hdmi_avi_infoframe *frame)
1241 {
1242         hdmi_infoframe_log_header(level, dev,
1243                                   (const struct hdmi_any_infoframe *)frame);
1244
1245         hdmi_log("    colorspace: %s\n",
1246                         hdmi_colorspace_get_name(frame->colorspace));
1247         hdmi_log("    scan mode: %s\n",
1248                         hdmi_scan_mode_get_name(frame->scan_mode));
1249         hdmi_log("    colorimetry: %s\n",
1250                         hdmi_colorimetry_get_name(frame->colorimetry));
1251         hdmi_log("    picture aspect: %s\n",
1252                         hdmi_picture_aspect_get_name(frame->picture_aspect));
1253         hdmi_log("    active aspect: %s\n",
1254                         hdmi_active_aspect_get_name(frame->active_aspect));
1255         hdmi_log("    itc: %s\n", frame->itc ? "IT Content" : "No Data");
1256         hdmi_log("    extended colorimetry: %s\n",
1257                         hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
1258         hdmi_log("    quantization range: %s\n",
1259                         hdmi_quantization_range_get_name(frame->quantization_range));
1260         hdmi_log("    nups: %s\n", hdmi_nups_get_name(frame->nups));
1261         hdmi_log("    video code: %u\n", frame->video_code);
1262         hdmi_log("    ycc quantization range: %s\n",
1263                         hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
1264         hdmi_log("    hdmi content type: %s\n",
1265                         hdmi_content_type_get_name(frame->content_type));
1266         hdmi_log("    pixel repeat: %u\n", frame->pixel_repeat);
1267         hdmi_log("    bar top %u, bottom %u, left %u, right %u\n",
1268                         frame->top_bar, frame->bottom_bar,
1269                         frame->left_bar, frame->right_bar);
1270 }
1271
1272 static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
1273 {
1274         if (sdi < 0 || sdi > 0xff)
1275                 return "Invalid";
1276         switch (sdi) {
1277         case HDMI_SPD_SDI_UNKNOWN:
1278                 return "Unknown";
1279         case HDMI_SPD_SDI_DSTB:
1280                 return "Digital STB";
1281         case HDMI_SPD_SDI_DVDP:
1282                 return "DVD Player";
1283         case HDMI_SPD_SDI_DVHS:
1284                 return "D-VHS";
1285         case HDMI_SPD_SDI_HDDVR:
1286                 return "HDD Videorecorder";
1287         case HDMI_SPD_SDI_DVC:
1288                 return "DVC";
1289         case HDMI_SPD_SDI_DSC:
1290                 return "DSC";
1291         case HDMI_SPD_SDI_VCD:
1292                 return "Video CD";
1293         case HDMI_SPD_SDI_GAME:
1294                 return "Game";
1295         case HDMI_SPD_SDI_PC:
1296                 return "PC General";
1297         case HDMI_SPD_SDI_BD:
1298                 return "Blu-Ray Disc (BD)";
1299         case HDMI_SPD_SDI_SACD:
1300                 return "Super Audio CD";
1301         case HDMI_SPD_SDI_HDDVD:
1302                 return "HD DVD";
1303         case HDMI_SPD_SDI_PMP:
1304                 return "PMP";
1305         }
1306         return "Reserved";
1307 }
1308
1309 static void hdmi_spd_infoframe_log(const char *level,
1310                                    struct device *dev,
1311                                    const struct hdmi_spd_infoframe *frame)
1312 {
1313         u8 buf[17];
1314
1315         hdmi_infoframe_log_header(level, dev,
1316                                   (const struct hdmi_any_infoframe *)frame);
1317
1318         memset(buf, 0, sizeof(buf));
1319
1320         strncpy(buf, frame->vendor, 8);
1321         hdmi_log("    vendor: %s\n", buf);
1322         strncpy(buf, frame->product, 16);
1323         hdmi_log("    product: %s\n", buf);
1324         hdmi_log("    source device information: %s (0x%x)\n",
1325                 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
1326 }
1327
1328 static const char *
1329 hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
1330 {
1331         switch (coding_type) {
1332         case HDMI_AUDIO_CODING_TYPE_STREAM:
1333                 return "Refer to Stream Header";
1334         case HDMI_AUDIO_CODING_TYPE_PCM:
1335                 return "PCM";
1336         case HDMI_AUDIO_CODING_TYPE_AC3:
1337                 return "AC-3";
1338         case HDMI_AUDIO_CODING_TYPE_MPEG1:
1339                 return "MPEG1";
1340         case HDMI_AUDIO_CODING_TYPE_MP3:
1341                 return "MP3";
1342         case HDMI_AUDIO_CODING_TYPE_MPEG2:
1343                 return "MPEG2";
1344         case HDMI_AUDIO_CODING_TYPE_AAC_LC:
1345                 return "AAC";
1346         case HDMI_AUDIO_CODING_TYPE_DTS:
1347                 return "DTS";
1348         case HDMI_AUDIO_CODING_TYPE_ATRAC:
1349                 return "ATRAC";
1350         case HDMI_AUDIO_CODING_TYPE_DSD:
1351                 return "One Bit Audio";
1352         case HDMI_AUDIO_CODING_TYPE_EAC3:
1353                 return "Dolby Digital +";
1354         case HDMI_AUDIO_CODING_TYPE_DTS_HD:
1355                 return "DTS-HD";
1356         case HDMI_AUDIO_CODING_TYPE_MLP:
1357                 return "MAT (MLP)";
1358         case HDMI_AUDIO_CODING_TYPE_DST:
1359                 return "DST";
1360         case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
1361                 return "WMA PRO";
1362         case HDMI_AUDIO_CODING_TYPE_CXT:
1363                 return "Refer to CXT";
1364         }
1365         return "Invalid";
1366 }
1367
1368 static const char *
1369 hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
1370 {
1371         switch (sample_size) {
1372         case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
1373                 return "Refer to Stream Header";
1374         case HDMI_AUDIO_SAMPLE_SIZE_16:
1375                 return "16 bit";
1376         case HDMI_AUDIO_SAMPLE_SIZE_20:
1377                 return "20 bit";
1378         case HDMI_AUDIO_SAMPLE_SIZE_24:
1379                 return "24 bit";
1380         }
1381         return "Invalid";
1382 }
1383
1384 static const char *
1385 hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
1386 {
1387         switch (freq) {
1388         case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
1389                 return "Refer to Stream Header";
1390         case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
1391                 return "32 kHz";
1392         case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
1393                 return "44.1 kHz (CD)";
1394         case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
1395                 return "48 kHz";
1396         case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
1397                 return "88.2 kHz";
1398         case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
1399                 return "96 kHz";
1400         case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
1401                 return "176.4 kHz";
1402         case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
1403                 return "192 kHz";
1404         }
1405         return "Invalid";
1406 }
1407
1408 static const char *
1409 hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
1410 {
1411         if (ctx < 0 || ctx > 0x1f)
1412                 return "Invalid";
1413
1414         switch (ctx) {
1415         case HDMI_AUDIO_CODING_TYPE_EXT_CT:
1416                 return "Refer to CT";
1417         case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
1418                 return "HE AAC";
1419         case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
1420                 return "HE AAC v2";
1421         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
1422                 return "MPEG SURROUND";
1423         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
1424                 return "MPEG-4 HE AAC";
1425         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
1426                 return "MPEG-4 HE AAC v2";
1427         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
1428                 return "MPEG-4 AAC LC";
1429         case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
1430                 return "DRA";
1431         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
1432                 return "MPEG-4 HE AAC + MPEG Surround";
1433         case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
1434                 return "MPEG-4 AAC LC + MPEG Surround";
1435         }
1436         return "Reserved";
1437 }
1438
1439 static void hdmi_audio_infoframe_log(const char *level,
1440                                      struct device *dev,
1441                                      const struct hdmi_audio_infoframe *frame)
1442 {
1443         hdmi_infoframe_log_header(level, dev,
1444                                   (const struct hdmi_any_infoframe *)frame);
1445
1446         if (frame->channels)
1447                 hdmi_log("    channels: %u\n", frame->channels - 1);
1448         else
1449                 hdmi_log("    channels: Refer to stream header\n");
1450         hdmi_log("    coding type: %s\n",
1451                         hdmi_audio_coding_type_get_name(frame->coding_type));
1452         hdmi_log("    sample size: %s\n",
1453                         hdmi_audio_sample_size_get_name(frame->sample_size));
1454         hdmi_log("    sample frequency: %s\n",
1455                         hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
1456         hdmi_log("    coding type ext: %s\n",
1457                         hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
1458         hdmi_log("    channel allocation: 0x%x\n",
1459                         frame->channel_allocation);
1460         hdmi_log("    level shift value: %u dB\n",
1461                         frame->level_shift_value);
1462         hdmi_log("    downmix inhibit: %s\n",
1463                         frame->downmix_inhibit ? "Yes" : "No");
1464 }
1465
1466 static void hdmi_drm_infoframe_log(const char *level,
1467                                    struct device *dev,
1468                                    const struct hdmi_drm_infoframe *frame)
1469 {
1470         int i;
1471
1472         hdmi_infoframe_log_header(level, dev,
1473                                   (struct hdmi_any_infoframe *)frame);
1474         hdmi_log("length: %d\n", frame->length);
1475         hdmi_log("metadata type: %d\n", frame->metadata_type);
1476         hdmi_log("eotf: %d\n", frame->eotf);
1477         for (i = 0; i < 3; i++) {
1478                 hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
1479                 hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
1480         }
1481
1482         hdmi_log("white point x: %d\n", frame->white_point.x);
1483         hdmi_log("white point y: %d\n", frame->white_point.y);
1484
1485         hdmi_log("max_display_mastering_luminance: %d\n",
1486                  frame->max_display_mastering_luminance);
1487         hdmi_log("min_display_mastering_luminance: %d\n",
1488                  frame->min_display_mastering_luminance);
1489
1490         hdmi_log("max_cll: %d\n", frame->max_cll);
1491         hdmi_log("max_fall: %d\n", frame->max_fall);
1492 }
1493
1494 static const char *
1495 hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
1496 {
1497         if (s3d_struct < 0 || s3d_struct > 0xf)
1498                 return "Invalid";
1499
1500         switch (s3d_struct) {
1501         case HDMI_3D_STRUCTURE_FRAME_PACKING:
1502                 return "Frame Packing";
1503         case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
1504                 return "Field Alternative";
1505         case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
1506                 return "Line Alternative";
1507         case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
1508                 return "Side-by-side (Full)";
1509         case HDMI_3D_STRUCTURE_L_DEPTH:
1510                 return "L + Depth";
1511         case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
1512                 return "L + Depth + Graphics + Graphics-depth";
1513         case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
1514                 return "Top-and-Bottom";
1515         case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
1516                 return "Side-by-side (Half)";
1517         default:
1518                 break;
1519         }
1520         return "Reserved";
1521 }
1522
1523 static void
1524 hdmi_vendor_any_infoframe_log(const char *level,
1525                               struct device *dev,
1526                               const union hdmi_vendor_any_infoframe *frame)
1527 {
1528         const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1529
1530         hdmi_infoframe_log_header(level, dev,
1531                                   (const struct hdmi_any_infoframe *)frame);
1532
1533         if (frame->any.oui != HDMI_IEEE_OUI) {
1534                 hdmi_log("    not a HDMI vendor infoframe\n");
1535                 return;
1536         }
1537         if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
1538                 hdmi_log("    empty frame\n");
1539                 return;
1540         }
1541
1542         if (hvf->vic)
1543                 hdmi_log("    HDMI VIC: %u\n", hvf->vic);
1544         if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
1545                 hdmi_log("    3D structure: %s\n",
1546                                 hdmi_3d_structure_get_name(hvf->s3d_struct));
1547                 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1548                         hdmi_log("    3D extension data: %d\n",
1549                                         hvf->s3d_ext_data);
1550         }
1551 }
1552
1553 /**
1554  * hdmi_infoframe_log() - log info of HDMI infoframe
1555  * @level: logging level
1556  * @dev: device
1557  * @frame: HDMI infoframe
1558  */
1559 void hdmi_infoframe_log(const char *level,
1560                         struct device *dev,
1561                         const union hdmi_infoframe *frame)
1562 {
1563         switch (frame->any.type) {
1564         case HDMI_INFOFRAME_TYPE_AVI:
1565                 hdmi_avi_infoframe_log(level, dev, &frame->avi);
1566                 break;
1567         case HDMI_INFOFRAME_TYPE_SPD:
1568                 hdmi_spd_infoframe_log(level, dev, &frame->spd);
1569                 break;
1570         case HDMI_INFOFRAME_TYPE_AUDIO:
1571                 hdmi_audio_infoframe_log(level, dev, &frame->audio);
1572                 break;
1573         case HDMI_INFOFRAME_TYPE_VENDOR:
1574                 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
1575                 break;
1576         case HDMI_INFOFRAME_TYPE_DRM:
1577                 hdmi_drm_infoframe_log(level, dev, &frame->drm);
1578                 break;
1579         }
1580 }
1581 EXPORT_SYMBOL(hdmi_infoframe_log);
1582
1583 /**
1584  * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1585  * @frame: HDMI AVI infoframe
1586  * @buffer: source buffer
1587  * @size: size of buffer
1588  *
1589  * Unpacks the information contained in binary @buffer into a structured
1590  * @frame of the HDMI Auxiliary Video (AVI) information frame.
1591  * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1592  * specification.
1593  *
1594  * Returns 0 on success or a negative error code on failure.
1595  */
1596 static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1597                                      const void *buffer, size_t size)
1598 {
1599         const u8 *ptr = buffer;
1600
1601         if (size < HDMI_INFOFRAME_SIZE(AVI))
1602                 return -EINVAL;
1603
1604         if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1605             ptr[1] != 2 ||
1606             ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1607                 return -EINVAL;
1608
1609         if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1610                 return -EINVAL;
1611
1612         hdmi_avi_infoframe_init(frame);
1613
1614         ptr += HDMI_INFOFRAME_HEADER_SIZE;
1615
1616         frame->colorspace = (ptr[0] >> 5) & 0x3;
1617         if (ptr[0] & 0x10)
1618                 frame->active_aspect = ptr[1] & 0xf;
1619         if (ptr[0] & 0x8) {
1620                 frame->top_bar = (ptr[6] << 8) | ptr[5];
1621                 frame->bottom_bar = (ptr[8] << 8) | ptr[7];
1622         }
1623         if (ptr[0] & 0x4) {
1624                 frame->left_bar = (ptr[10] << 8) | ptr[9];
1625                 frame->right_bar = (ptr[12] << 8) | ptr[11];
1626         }
1627         frame->scan_mode = ptr[0] & 0x3;
1628
1629         frame->colorimetry = (ptr[1] >> 6) & 0x3;
1630         frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1631         frame->active_aspect = ptr[1] & 0xf;
1632
1633         frame->itc = ptr[2] & 0x80 ? true : false;
1634         frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1635         frame->quantization_range = (ptr[2] >> 2) & 0x3;
1636         frame->nups = ptr[2] & 0x3;
1637
1638         frame->video_code = ptr[3] & 0x7f;
1639         frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1640         frame->content_type = (ptr[4] >> 4) & 0x3;
1641
1642         frame->pixel_repeat = ptr[4] & 0xf;
1643
1644         return 0;
1645 }
1646
1647 /**
1648  * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1649  * @frame: HDMI SPD infoframe
1650  * @buffer: source buffer
1651  * @size: size of buffer
1652  *
1653  * Unpacks the information contained in binary @buffer into a structured
1654  * @frame of the HDMI Source Product Description (SPD) information frame.
1655  * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1656  * specification.
1657  *
1658  * Returns 0 on success or a negative error code on failure.
1659  */
1660 static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1661                                      const void *buffer, size_t size)
1662 {
1663         const u8 *ptr = buffer;
1664         int ret;
1665
1666         if (size < HDMI_INFOFRAME_SIZE(SPD))
1667                 return -EINVAL;
1668
1669         if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1670             ptr[1] != 1 ||
1671             ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1672                 return -EINVAL;
1673         }
1674
1675         if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1676                 return -EINVAL;
1677
1678         ptr += HDMI_INFOFRAME_HEADER_SIZE;
1679
1680         ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1681         if (ret)
1682                 return ret;
1683
1684         frame->sdi = ptr[24];
1685
1686         return 0;
1687 }
1688
1689 /**
1690  * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1691  * @frame: HDMI Audio infoframe
1692  * @buffer: source buffer
1693  * @size: size of buffer
1694  *
1695  * Unpacks the information contained in binary @buffer into a structured
1696  * @frame of the HDMI Audio information frame.
1697  * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1698  * specification.
1699  *
1700  * Returns 0 on success or a negative error code on failure.
1701  */
1702 static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1703                                        const void *buffer, size_t size)
1704 {
1705         const u8 *ptr = buffer;
1706         int ret;
1707
1708         if (size < HDMI_INFOFRAME_SIZE(AUDIO))
1709                 return -EINVAL;
1710
1711         if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1712             ptr[1] != 1 ||
1713             ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1714                 return -EINVAL;
1715         }
1716
1717         if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1718                 return -EINVAL;
1719
1720         ret = hdmi_audio_infoframe_init(frame);
1721         if (ret)
1722                 return ret;
1723
1724         ptr += HDMI_INFOFRAME_HEADER_SIZE;
1725
1726         frame->channels = ptr[0] & 0x7;
1727         frame->coding_type = (ptr[0] >> 4) & 0xf;
1728         frame->sample_size = ptr[1] & 0x3;
1729         frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1730         frame->coding_type_ext = ptr[2] & 0x1f;
1731         frame->channel_allocation = ptr[3];
1732         frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1733         frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1734
1735         return 0;
1736 }
1737
1738 /**
1739  * hdmi_vendor_any_infoframe_unpack() - unpack binary buffer to a HDMI
1740  *      vendor infoframe
1741  * @frame: HDMI Vendor infoframe
1742  * @buffer: source buffer
1743  * @size: size of buffer
1744  *
1745  * Unpacks the information contained in binary @buffer into a structured
1746  * @frame of the HDMI Vendor information frame.
1747  * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1748  * specification.
1749  *
1750  * Returns 0 on success or a negative error code on failure.
1751  */
1752 static int
1753 hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1754                                  const void *buffer, size_t size)
1755 {
1756         const u8 *ptr = buffer;
1757         size_t length;
1758         int ret;
1759         u8 hdmi_video_format;
1760         struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1761
1762         if (size < HDMI_INFOFRAME_HEADER_SIZE)
1763                 return -EINVAL;
1764
1765         if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1766             ptr[1] != 1 ||
1767             (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1768                 return -EINVAL;
1769
1770         length = ptr[2];
1771
1772         if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
1773                 return -EINVAL;
1774
1775         if (hdmi_infoframe_checksum(buffer,
1776                                     HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1777                 return -EINVAL;
1778
1779         ptr += HDMI_INFOFRAME_HEADER_SIZE;
1780
1781         /* HDMI OUI */
1782         if ((ptr[0] != 0x03) ||
1783             (ptr[1] != 0x0c) ||
1784             (ptr[2] != 0x00))
1785                 return -EINVAL;
1786
1787         hdmi_video_format = ptr[3] >> 5;
1788
1789         if (hdmi_video_format > 0x2)
1790                 return -EINVAL;
1791
1792         ret = hdmi_vendor_infoframe_init(hvf);
1793         if (ret)
1794                 return ret;
1795
1796         hvf->length = length;
1797
1798         if (hdmi_video_format == 0x2) {
1799                 if (length != 5 && length != 6)
1800                         return -EINVAL;
1801                 hvf->s3d_struct = ptr[4] >> 4;
1802                 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1803                         if (length != 6)
1804                                 return -EINVAL;
1805                         hvf->s3d_ext_data = ptr[5] >> 4;
1806                 }
1807         } else if (hdmi_video_format == 0x1) {
1808                 if (length != 5)
1809                         return -EINVAL;
1810                 hvf->vic = ptr[4];
1811         } else {
1812                 if (length != 4)
1813                         return -EINVAL;
1814         }
1815
1816         return 0;
1817 }
1818
1819 /**
1820  * hdmi_drm_infoframe_unpack_only() - unpack binary buffer of CTA-861-G DRM
1821  *                                    infoframe DataBytes to a HDMI DRM
1822  *                                    infoframe
1823  * @frame: HDMI DRM infoframe
1824  * @buffer: source buffer
1825  * @size: size of buffer
1826  *
1827  * Unpacks CTA-861-G DRM infoframe DataBytes contained in the binary @buffer
1828  * into a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1829  * infoframe.
1830  *
1831  * Returns 0 on success or a negative error code on failure.
1832  */
1833 int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
1834                                    const void *buffer, size_t size)
1835 {
1836         const u8 *ptr = buffer;
1837         const u8 *temp;
1838         u8 x_lsb, x_msb;
1839         u8 y_lsb, y_msb;
1840         int ret;
1841         int i;
1842
1843         if (size < HDMI_DRM_INFOFRAME_SIZE)
1844                 return -EINVAL;
1845
1846         ret = hdmi_drm_infoframe_init(frame);
1847         if (ret)
1848                 return ret;
1849
1850         frame->eotf = ptr[0] & 0x7;
1851         frame->metadata_type = ptr[1] & 0x7;
1852
1853         temp = ptr + 2;
1854         for (i = 0; i < 3; i++) {
1855                 x_lsb = *temp++;
1856                 x_msb = *temp++;
1857                 frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
1858                 y_lsb = *temp++;
1859                 y_msb = *temp++;
1860                 frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
1861         }
1862
1863         frame->white_point.x = (ptr[15] << 8) | ptr[14];
1864         frame->white_point.y = (ptr[17] << 8) | ptr[16];
1865
1866         frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
1867         frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
1868         frame->max_cll = (ptr[23] << 8) | ptr[22];
1869         frame->max_fall = (ptr[25] << 8) | ptr[24];
1870
1871         return 0;
1872 }
1873 EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
1874
1875 /**
1876  * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
1877  * @frame: HDMI DRM infoframe
1878  * @buffer: source buffer
1879  * @size: size of buffer
1880  *
1881  * Unpacks the CTA-861-G DRM infoframe contained in the binary @buffer into
1882  * a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1883  * infoframe. It also verifies the checksum as required by section 5.3.5 of
1884  * the HDMI 1.4 specification.
1885  *
1886  * Returns 0 on success or a negative error code on failure.
1887  */
1888 static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
1889                                      const void *buffer, size_t size)
1890 {
1891         const u8 *ptr = buffer;
1892         int ret;
1893
1894         if (size < HDMI_INFOFRAME_SIZE(DRM))
1895                 return -EINVAL;
1896
1897         if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
1898             ptr[1] != 1 ||
1899             ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
1900                 return -EINVAL;
1901
1902         if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
1903                 return -EINVAL;
1904
1905         ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
1906                                              size - HDMI_INFOFRAME_HEADER_SIZE);
1907         return ret;
1908 }
1909
1910 /**
1911  * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1912  * @frame: HDMI infoframe
1913  * @buffer: source buffer
1914  * @size: size of buffer
1915  *
1916  * Unpacks the information contained in binary buffer @buffer into a structured
1917  * @frame of a HDMI infoframe.
1918  * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1919  * specification.
1920  *
1921  * Returns 0 on success or a negative error code on failure.
1922  */
1923 int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
1924                           const void *buffer, size_t size)
1925 {
1926         int ret;
1927         const u8 *ptr = buffer;
1928
1929         if (size < HDMI_INFOFRAME_HEADER_SIZE)
1930                 return -EINVAL;
1931
1932         switch (ptr[0]) {
1933         case HDMI_INFOFRAME_TYPE_AVI:
1934                 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
1935                 break;
1936         case HDMI_INFOFRAME_TYPE_DRM:
1937                 ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
1938                 break;
1939         case HDMI_INFOFRAME_TYPE_SPD:
1940                 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
1941                 break;
1942         case HDMI_INFOFRAME_TYPE_AUDIO:
1943                 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
1944                 break;
1945         case HDMI_INFOFRAME_TYPE_VENDOR:
1946                 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
1947                 break;
1948         default:
1949                 ret = -EINVAL;
1950                 break;
1951         }
1952
1953         return ret;
1954 }
1955 EXPORT_SYMBOL(hdmi_infoframe_unpack);