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