1 /* 2 * Generic routines and proc interface for ELD(EDID Like Data) information 3 * 4 * Copyright(c) 2008 Intel Corporation. 5 * Copyright (c) 2013 Anssi Hannula <anssi.hannula@iki.fi> 6 * 7 * Authors: 8 * Wu Fengguang <wfg@linux.intel.com> 9 * 10 * This driver is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This driver is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25 #include <linux/init.h> 26 #include <linux/slab.h> 27 #include <sound/core.h> 28 #include <asm/unaligned.h> 29 #include <sound/hda_chmap.h> 30 #include <sound/hda_codec.h> 31 #include "hda_local.h" 32 33 enum eld_versions { 34 ELD_VER_CEA_861D = 2, 35 ELD_VER_PARTIAL = 31, 36 }; 37 38 enum cea_edid_versions { 39 CEA_EDID_VER_NONE = 0, 40 CEA_EDID_VER_CEA861 = 1, 41 CEA_EDID_VER_CEA861A = 2, 42 CEA_EDID_VER_CEA861BCD = 3, 43 CEA_EDID_VER_RESERVED = 4, 44 }; 45 46 static const char * const eld_connection_type_names[4] = { 47 "HDMI", 48 "DisplayPort", 49 "2-reserved", 50 "3-reserved" 51 }; 52 53 enum cea_audio_coding_types { 54 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0, 55 AUDIO_CODING_TYPE_LPCM = 1, 56 AUDIO_CODING_TYPE_AC3 = 2, 57 AUDIO_CODING_TYPE_MPEG1 = 3, 58 AUDIO_CODING_TYPE_MP3 = 4, 59 AUDIO_CODING_TYPE_MPEG2 = 5, 60 AUDIO_CODING_TYPE_AACLC = 6, 61 AUDIO_CODING_TYPE_DTS = 7, 62 AUDIO_CODING_TYPE_ATRAC = 8, 63 AUDIO_CODING_TYPE_SACD = 9, 64 AUDIO_CODING_TYPE_EAC3 = 10, 65 AUDIO_CODING_TYPE_DTS_HD = 11, 66 AUDIO_CODING_TYPE_MLP = 12, 67 AUDIO_CODING_TYPE_DST = 13, 68 AUDIO_CODING_TYPE_WMAPRO = 14, 69 AUDIO_CODING_TYPE_REF_CXT = 15, 70 /* also include valid xtypes below */ 71 AUDIO_CODING_TYPE_HE_AAC = 15, 72 AUDIO_CODING_TYPE_HE_AAC2 = 16, 73 AUDIO_CODING_TYPE_MPEG_SURROUND = 17, 74 }; 75 76 enum cea_audio_coding_xtypes { 77 AUDIO_CODING_XTYPE_HE_REF_CT = 0, 78 AUDIO_CODING_XTYPE_HE_AAC = 1, 79 AUDIO_CODING_XTYPE_HE_AAC2 = 2, 80 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3, 81 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4, 82 }; 83 84 static const char * const cea_audio_coding_type_names[] = { 85 /* 0 */ "undefined", 86 /* 1 */ "LPCM", 87 /* 2 */ "AC-3", 88 /* 3 */ "MPEG1", 89 /* 4 */ "MP3", 90 /* 5 */ "MPEG2", 91 /* 6 */ "AAC-LC", 92 /* 7 */ "DTS", 93 /* 8 */ "ATRAC", 94 /* 9 */ "DSD (One Bit Audio)", 95 /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)", 96 /* 11 */ "DTS-HD", 97 /* 12 */ "MLP (Dolby TrueHD)", 98 /* 13 */ "DST", 99 /* 14 */ "WMAPro", 100 /* 15 */ "HE-AAC", 101 /* 16 */ "HE-AACv2", 102 /* 17 */ "MPEG Surround", 103 }; 104 105 /* 106 * The following two lists are shared between 107 * - HDMI audio InfoFrame (source to sink) 108 * - CEA E-EDID Extension (sink to source) 109 */ 110 111 /* 112 * SS1:SS0 index => sample size 113 */ 114 static int cea_sample_sizes[4] = { 115 0, /* 0: Refer to Stream Header */ 116 AC_SUPPCM_BITS_16, /* 1: 16 bits */ 117 AC_SUPPCM_BITS_20, /* 2: 20 bits */ 118 AC_SUPPCM_BITS_24, /* 3: 24 bits */ 119 }; 120 121 /* 122 * SF2:SF1:SF0 index => sampling frequency 123 */ 124 static int cea_sampling_frequencies[8] = { 125 0, /* 0: Refer to Stream Header */ 126 SNDRV_PCM_RATE_32000, /* 1: 32000Hz */ 127 SNDRV_PCM_RATE_44100, /* 2: 44100Hz */ 128 SNDRV_PCM_RATE_48000, /* 3: 48000Hz */ 129 SNDRV_PCM_RATE_88200, /* 4: 88200Hz */ 130 SNDRV_PCM_RATE_96000, /* 5: 96000Hz */ 131 SNDRV_PCM_RATE_176400, /* 6: 176400Hz */ 132 SNDRV_PCM_RATE_192000, /* 7: 192000Hz */ 133 }; 134 135 static unsigned int hdmi_get_eld_data(struct hda_codec *codec, hda_nid_t nid, 136 int byte_index) 137 { 138 unsigned int val; 139 140 val = snd_hda_codec_read(codec, nid, 0, 141 AC_VERB_GET_HDMI_ELDD, byte_index); 142 #ifdef BE_PARANOID 143 codec_info(codec, "HDMI: ELD data byte %d: 0x%x\n", byte_index, val); 144 #endif 145 return val; 146 } 147 148 #define GRAB_BITS(buf, byte, lowbit, bits) \ 149 ({ \ 150 BUILD_BUG_ON(lowbit > 7); \ 151 BUILD_BUG_ON(bits > 8); \ 152 BUILD_BUG_ON(bits <= 0); \ 153 \ 154 (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \ 155 }) 156 157 static void hdmi_update_short_audio_desc(struct hda_codec *codec, 158 struct cea_sad *a, 159 const unsigned char *buf) 160 { 161 int i; 162 int val; 163 164 val = GRAB_BITS(buf, 1, 0, 7); 165 a->rates = 0; 166 for (i = 0; i < 7; i++) 167 if (val & (1 << i)) 168 a->rates |= cea_sampling_frequencies[i + 1]; 169 170 a->channels = GRAB_BITS(buf, 0, 0, 3); 171 a->channels++; 172 173 a->sample_bits = 0; 174 a->max_bitrate = 0; 175 176 a->format = GRAB_BITS(buf, 0, 3, 4); 177 switch (a->format) { 178 case AUDIO_CODING_TYPE_REF_STREAM_HEADER: 179 codec_info(codec, "HDMI: audio coding type 0 not expected\n"); 180 break; 181 182 case AUDIO_CODING_TYPE_LPCM: 183 val = GRAB_BITS(buf, 2, 0, 3); 184 for (i = 0; i < 3; i++) 185 if (val & (1 << i)) 186 a->sample_bits |= cea_sample_sizes[i + 1]; 187 break; 188 189 case AUDIO_CODING_TYPE_AC3: 190 case AUDIO_CODING_TYPE_MPEG1: 191 case AUDIO_CODING_TYPE_MP3: 192 case AUDIO_CODING_TYPE_MPEG2: 193 case AUDIO_CODING_TYPE_AACLC: 194 case AUDIO_CODING_TYPE_DTS: 195 case AUDIO_CODING_TYPE_ATRAC: 196 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8); 197 a->max_bitrate *= 8000; 198 break; 199 200 case AUDIO_CODING_TYPE_SACD: 201 break; 202 203 case AUDIO_CODING_TYPE_EAC3: 204 break; 205 206 case AUDIO_CODING_TYPE_DTS_HD: 207 break; 208 209 case AUDIO_CODING_TYPE_MLP: 210 break; 211 212 case AUDIO_CODING_TYPE_DST: 213 break; 214 215 case AUDIO_CODING_TYPE_WMAPRO: 216 a->profile = GRAB_BITS(buf, 2, 0, 3); 217 break; 218 219 case AUDIO_CODING_TYPE_REF_CXT: 220 a->format = GRAB_BITS(buf, 2, 3, 5); 221 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT || 222 a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) { 223 codec_info(codec, 224 "HDMI: audio coding xtype %d not expected\n", 225 a->format); 226 a->format = 0; 227 } else 228 a->format += AUDIO_CODING_TYPE_HE_AAC - 229 AUDIO_CODING_XTYPE_HE_AAC; 230 break; 231 } 232 } 233 234 /* 235 * Be careful, ELD buf could be totally rubbish! 236 */ 237 int snd_hdmi_parse_eld(struct hda_codec *codec, struct parsed_hdmi_eld *e, 238 const unsigned char *buf, int size) 239 { 240 int mnl; 241 int i; 242 243 memset(e, 0, sizeof(*e)); 244 e->eld_ver = GRAB_BITS(buf, 0, 3, 5); 245 if (e->eld_ver != ELD_VER_CEA_861D && 246 e->eld_ver != ELD_VER_PARTIAL) { 247 codec_info(codec, "HDMI: Unknown ELD version %d\n", e->eld_ver); 248 goto out_fail; 249 } 250 251 e->baseline_len = GRAB_BITS(buf, 2, 0, 8); 252 mnl = GRAB_BITS(buf, 4, 0, 5); 253 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3); 254 255 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1); 256 e->support_ai = GRAB_BITS(buf, 5, 1, 1); 257 e->conn_type = GRAB_BITS(buf, 5, 2, 2); 258 e->sad_count = GRAB_BITS(buf, 5, 4, 4); 259 260 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2; 261 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7); 262 263 e->port_id = get_unaligned_le64(buf + 8); 264 265 /* not specified, but the spec's tendency is little endian */ 266 e->manufacture_id = get_unaligned_le16(buf + 16); 267 e->product_id = get_unaligned_le16(buf + 18); 268 269 if (mnl > ELD_MAX_MNL) { 270 codec_info(codec, "HDMI: MNL is reserved value %d\n", mnl); 271 goto out_fail; 272 } else if (ELD_FIXED_BYTES + mnl > size) { 273 codec_info(codec, "HDMI: out of range MNL %d\n", mnl); 274 goto out_fail; 275 } else 276 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl + 1); 277 278 for (i = 0; i < e->sad_count; i++) { 279 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) { 280 codec_info(codec, "HDMI: out of range SAD %d\n", i); 281 goto out_fail; 282 } 283 hdmi_update_short_audio_desc(codec, e->sad + i, 284 buf + ELD_FIXED_BYTES + mnl + 3 * i); 285 } 286 287 /* 288 * HDMI sink's ELD info cannot always be retrieved for now, e.g. 289 * in console or for audio devices. Assume the highest speakers 290 * configuration, to _not_ prohibit multi-channel audio playback. 291 */ 292 if (!e->spk_alloc) 293 e->spk_alloc = 0xffff; 294 295 return 0; 296 297 out_fail: 298 return -EINVAL; 299 } 300 301 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid) 302 { 303 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE, 304 AC_DIPSIZE_ELD_BUF); 305 } 306 307 int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid, 308 unsigned char *buf, int *eld_size) 309 { 310 int i; 311 int ret = 0; 312 int size; 313 314 /* 315 * ELD size is initialized to zero in caller function. If no errors and 316 * ELD is valid, actual eld_size is assigned. 317 */ 318 319 size = snd_hdmi_get_eld_size(codec, nid); 320 if (size == 0) { 321 /* wfg: workaround for ASUS P5E-VM HDMI board */ 322 codec_info(codec, "HDMI: ELD buf size is 0, force 128\n"); 323 size = 128; 324 } 325 if (size < ELD_FIXED_BYTES || size > ELD_MAX_SIZE) { 326 codec_info(codec, "HDMI: invalid ELD buf size %d\n", size); 327 return -ERANGE; 328 } 329 330 /* set ELD buffer */ 331 for (i = 0; i < size; i++) { 332 unsigned int val = hdmi_get_eld_data(codec, nid, i); 333 /* 334 * Graphics driver might be writing to ELD buffer right now. 335 * Just abort. The caller will repoll after a while. 336 */ 337 if (!(val & AC_ELDD_ELD_VALID)) { 338 codec_info(codec, "HDMI: invalid ELD data byte %d\n", i); 339 ret = -EINVAL; 340 goto error; 341 } 342 val &= AC_ELDD_ELD_DATA; 343 /* 344 * The first byte cannot be zero. This can happen on some DVI 345 * connections. Some Intel chips may also need some 250ms delay 346 * to return non-zero ELD data, even when the graphics driver 347 * correctly writes ELD content before setting ELD_valid bit. 348 */ 349 if (!val && !i) { 350 codec_dbg(codec, "HDMI: 0 ELD data\n"); 351 ret = -EINVAL; 352 goto error; 353 } 354 buf[i] = val; 355 } 356 357 *eld_size = size; 358 error: 359 return ret; 360 } 361 362 /* 363 * SNDRV_PCM_RATE_* and AC_PAR_PCM values don't match, print correct rates with 364 * hdmi-specific routine. 365 */ 366 static void hdmi_print_pcm_rates(int pcm, char *buf, int buflen) 367 { 368 static unsigned int alsa_rates[] = { 369 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 370 88200, 96000, 176400, 192000, 384000 371 }; 372 int i, j; 373 374 for (i = 0, j = 0; i < ARRAY_SIZE(alsa_rates); i++) 375 if (pcm & (1 << i)) 376 j += snprintf(buf + j, buflen - j, " %d", 377 alsa_rates[i]); 378 379 buf[j] = '\0'; /* necessary when j == 0 */ 380 } 381 382 #define SND_PRINT_RATES_ADVISED_BUFSIZE 80 383 384 static void hdmi_show_short_audio_desc(struct hda_codec *codec, 385 struct cea_sad *a) 386 { 387 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE]; 388 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits ="; 389 390 if (!a->format) 391 return; 392 393 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf)); 394 395 if (a->format == AUDIO_CODING_TYPE_LPCM) 396 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8); 397 else if (a->max_bitrate) 398 snprintf(buf2, sizeof(buf2), 399 ", max bitrate = %d", a->max_bitrate); 400 else 401 buf2[0] = '\0'; 402 403 codec_dbg(codec, 404 "HDMI: supports coding type %s: channels = %d, rates =%s%s\n", 405 cea_audio_coding_type_names[a->format], 406 a->channels, buf, buf2); 407 } 408 409 void snd_hdmi_show_eld(struct hda_codec *codec, struct parsed_hdmi_eld *e) 410 { 411 int i; 412 413 codec_dbg(codec, "HDMI: detected monitor %s at connection type %s\n", 414 e->monitor_name, 415 eld_connection_type_names[e->conn_type]); 416 417 if (e->spk_alloc) { 418 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; 419 snd_hdac_print_channel_allocation(e->spk_alloc, buf, sizeof(buf)); 420 codec_dbg(codec, "HDMI: available speakers:%s\n", buf); 421 } 422 423 for (i = 0; i < e->sad_count; i++) 424 hdmi_show_short_audio_desc(codec, e->sad + i); 425 } 426 427 #ifdef CONFIG_SND_PROC_FS 428 429 static void hdmi_print_sad_info(int i, struct cea_sad *a, 430 struct snd_info_buffer *buffer) 431 { 432 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE]; 433 434 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n", 435 i, a->format, cea_audio_coding_type_names[a->format]); 436 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels); 437 438 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf)); 439 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf); 440 441 if (a->format == AUDIO_CODING_TYPE_LPCM) { 442 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf)); 443 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n", 444 i, a->sample_bits, buf); 445 } 446 447 if (a->max_bitrate) 448 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n", 449 i, a->max_bitrate); 450 451 if (a->profile) 452 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile); 453 } 454 455 void snd_hdmi_print_eld_info(struct hdmi_eld *eld, 456 struct snd_info_buffer *buffer) 457 { 458 struct parsed_hdmi_eld *e = &eld->info; 459 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; 460 int i; 461 static const char * const eld_version_names[32] = { 462 "reserved", 463 "reserved", 464 "CEA-861D or below", 465 [3 ... 30] = "reserved", 466 [31] = "partial" 467 }; 468 static const char * const cea_edid_version_names[8] = { 469 "no CEA EDID Timing Extension block present", 470 "CEA-861", 471 "CEA-861-A", 472 "CEA-861-B, C or D", 473 [4 ... 7] = "reserved" 474 }; 475 476 snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present); 477 snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid); 478 if (!eld->eld_valid) 479 return; 480 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name); 481 snd_iprintf(buffer, "connection_type\t\t%s\n", 482 eld_connection_type_names[e->conn_type]); 483 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver, 484 eld_version_names[e->eld_ver]); 485 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver, 486 cea_edid_version_names[e->cea_edid_ver]); 487 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id); 488 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id); 489 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id); 490 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp); 491 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai); 492 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay); 493 494 snd_hdac_print_channel_allocation(e->spk_alloc, buf, sizeof(buf)); 495 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf); 496 497 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count); 498 499 for (i = 0; i < e->sad_count; i++) 500 hdmi_print_sad_info(i, e->sad + i, buffer); 501 } 502 503 void snd_hdmi_write_eld_info(struct hdmi_eld *eld, 504 struct snd_info_buffer *buffer) 505 { 506 struct parsed_hdmi_eld *e = &eld->info; 507 char line[64]; 508 char name[64]; 509 char *sname; 510 long long val; 511 unsigned int n; 512 513 while (!snd_info_get_line(buffer, line, sizeof(line))) { 514 if (sscanf(line, "%s %llx", name, &val) != 2) 515 continue; 516 /* 517 * We don't allow modification to these fields: 518 * monitor_name manufacture_id product_id 519 * eld_version edid_version 520 */ 521 if (!strcmp(name, "monitor_present")) 522 eld->monitor_present = val; 523 else if (!strcmp(name, "eld_valid")) 524 eld->eld_valid = val; 525 else if (!strcmp(name, "connection_type")) 526 e->conn_type = val; 527 else if (!strcmp(name, "port_id")) 528 e->port_id = val; 529 else if (!strcmp(name, "support_hdcp")) 530 e->support_hdcp = val; 531 else if (!strcmp(name, "support_ai")) 532 e->support_ai = val; 533 else if (!strcmp(name, "audio_sync_delay")) 534 e->aud_synch_delay = val; 535 else if (!strcmp(name, "speakers")) 536 e->spk_alloc = val; 537 else if (!strcmp(name, "sad_count")) 538 e->sad_count = val; 539 else if (!strncmp(name, "sad", 3)) { 540 sname = name + 4; 541 n = name[3] - '0'; 542 if (name[4] >= '0' && name[4] <= '9') { 543 sname++; 544 n = 10 * n + name[4] - '0'; 545 } 546 if (n >= ELD_MAX_SAD) 547 continue; 548 if (!strcmp(sname, "_coding_type")) 549 e->sad[n].format = val; 550 else if (!strcmp(sname, "_channels")) 551 e->sad[n].channels = val; 552 else if (!strcmp(sname, "_rates")) 553 e->sad[n].rates = val; 554 else if (!strcmp(sname, "_bits")) 555 e->sad[n].sample_bits = val; 556 else if (!strcmp(sname, "_max_bitrate")) 557 e->sad[n].max_bitrate = val; 558 else if (!strcmp(sname, "_profile")) 559 e->sad[n].profile = val; 560 if (n >= e->sad_count) 561 e->sad_count = n + 1; 562 } 563 } 564 } 565 #endif /* CONFIG_SND_PROC_FS */ 566 567 /* update PCM info based on ELD */ 568 void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e, 569 struct hda_pcm_stream *hinfo) 570 { 571 u32 rates; 572 u64 formats; 573 unsigned int maxbps; 574 unsigned int channels_max; 575 int i; 576 577 /* assume basic audio support (the basic audio flag is not in ELD; 578 * however, all audio capable sinks are required to support basic 579 * audio) */ 580 rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | 581 SNDRV_PCM_RATE_48000; 582 formats = SNDRV_PCM_FMTBIT_S16_LE; 583 maxbps = 16; 584 channels_max = 2; 585 for (i = 0; i < e->sad_count; i++) { 586 struct cea_sad *a = &e->sad[i]; 587 rates |= a->rates; 588 if (a->channels > channels_max) 589 channels_max = a->channels; 590 if (a->format == AUDIO_CODING_TYPE_LPCM) { 591 if (a->sample_bits & AC_SUPPCM_BITS_20) { 592 formats |= SNDRV_PCM_FMTBIT_S32_LE; 593 if (maxbps < 20) 594 maxbps = 20; 595 } 596 if (a->sample_bits & AC_SUPPCM_BITS_24) { 597 formats |= SNDRV_PCM_FMTBIT_S32_LE; 598 if (maxbps < 24) 599 maxbps = 24; 600 } 601 } 602 } 603 604 /* restrict the parameters by the values the codec provides */ 605 hinfo->rates &= rates; 606 hinfo->formats &= formats; 607 hinfo->maxbps = min(hinfo->maxbps, maxbps); 608 hinfo->channels_max = min(hinfo->channels_max, channels_max); 609 } 610 611 612 /* ATI/AMD specific stuff (ELD emulation) */ 613 614 #define ATI_VERB_SET_AUDIO_DESCRIPTOR 0x776 615 #define ATI_VERB_SET_SINK_INFO_INDEX 0x780 616 #define ATI_VERB_GET_SPEAKER_ALLOCATION 0xf70 617 #define ATI_VERB_GET_AUDIO_DESCRIPTOR 0xf76 618 #define ATI_VERB_GET_AUDIO_VIDEO_DELAY 0xf7b 619 #define ATI_VERB_GET_SINK_INFO_INDEX 0xf80 620 #define ATI_VERB_GET_SINK_INFO_DATA 0xf81 621 622 #define ATI_SPKALLOC_SPKALLOC 0x007f 623 #define ATI_SPKALLOC_TYPE_HDMI 0x0100 624 #define ATI_SPKALLOC_TYPE_DISPLAYPORT 0x0200 625 626 /* first three bytes are just standard SAD */ 627 #define ATI_AUDIODESC_CHANNELS 0x00000007 628 #define ATI_AUDIODESC_RATES 0x0000ff00 629 #define ATI_AUDIODESC_LPCM_STEREO_RATES 0xff000000 630 631 /* in standard HDMI VSDB format */ 632 #define ATI_DELAY_VIDEO_LATENCY 0x000000ff 633 #define ATI_DELAY_AUDIO_LATENCY 0x0000ff00 634 635 enum ati_sink_info_idx { 636 ATI_INFO_IDX_MANUFACTURER_ID = 0, 637 ATI_INFO_IDX_PRODUCT_ID = 1, 638 ATI_INFO_IDX_SINK_DESC_LEN = 2, 639 ATI_INFO_IDX_PORT_ID_LOW = 3, 640 ATI_INFO_IDX_PORT_ID_HIGH = 4, 641 ATI_INFO_IDX_SINK_DESC_FIRST = 5, 642 ATI_INFO_IDX_SINK_DESC_LAST = 22, /* max len 18 bytes */ 643 }; 644 645 int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid, 646 unsigned char *buf, int *eld_size, bool rev3_or_later) 647 { 648 int spkalloc, ati_sad, aud_synch; 649 int sink_desc_len = 0; 650 int pos, i; 651 652 /* ATI/AMD does not have ELD, emulate it */ 653 654 spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0); 655 656 if (spkalloc <= 0) { 657 codec_info(codec, "HDMI ATI/AMD: no speaker allocation for ELD\n"); 658 return -EINVAL; 659 } 660 661 memset(buf, 0, ELD_FIXED_BYTES + ELD_MAX_MNL + ELD_MAX_SAD * 3); 662 663 /* version */ 664 buf[0] = ELD_VER_CEA_861D << 3; 665 666 /* speaker allocation from EDID */ 667 buf[7] = spkalloc & ATI_SPKALLOC_SPKALLOC; 668 669 /* is DisplayPort? */ 670 if (spkalloc & ATI_SPKALLOC_TYPE_DISPLAYPORT) 671 buf[5] |= 0x04; 672 673 pos = ELD_FIXED_BYTES; 674 675 if (rev3_or_later) { 676 int sink_info; 677 678 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_LOW); 679 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 680 put_unaligned_le32(sink_info, buf + 8); 681 682 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_HIGH); 683 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 684 put_unaligned_le32(sink_info, buf + 12); 685 686 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_MANUFACTURER_ID); 687 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 688 put_unaligned_le16(sink_info, buf + 16); 689 690 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PRODUCT_ID); 691 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 692 put_unaligned_le16(sink_info, buf + 18); 693 694 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_LEN); 695 sink_desc_len = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 696 697 if (sink_desc_len > ELD_MAX_MNL) { 698 codec_info(codec, "HDMI ATI/AMD: Truncating HDMI sink description with length %d\n", 699 sink_desc_len); 700 sink_desc_len = ELD_MAX_MNL; 701 } 702 703 buf[4] |= sink_desc_len; 704 705 for (i = 0; i < sink_desc_len; i++) { 706 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_FIRST + i); 707 buf[pos++] = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0); 708 } 709 } 710 711 for (i = AUDIO_CODING_TYPE_LPCM; i <= AUDIO_CODING_TYPE_WMAPRO; i++) { 712 if (i == AUDIO_CODING_TYPE_SACD || i == AUDIO_CODING_TYPE_DST) 713 continue; /* not handled by ATI/AMD */ 714 715 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3); 716 ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0); 717 718 if (ati_sad <= 0) 719 continue; 720 721 if (ati_sad & ATI_AUDIODESC_RATES) { 722 /* format is supported, copy SAD as-is */ 723 buf[pos++] = (ati_sad & 0x0000ff) >> 0; 724 buf[pos++] = (ati_sad & 0x00ff00) >> 8; 725 buf[pos++] = (ati_sad & 0xff0000) >> 16; 726 } 727 728 if (i == AUDIO_CODING_TYPE_LPCM 729 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) 730 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) >> 16 != (ati_sad & ATI_AUDIODESC_RATES)) { 731 /* for PCM there is a separate stereo rate mask */ 732 buf[pos++] = ((ati_sad & 0x000000ff) & ~ATI_AUDIODESC_CHANNELS) | 0x1; 733 /* rates from the extra byte */ 734 buf[pos++] = (ati_sad & 0xff000000) >> 24; 735 buf[pos++] = (ati_sad & 0x00ff0000) >> 16; 736 } 737 } 738 739 if (pos == ELD_FIXED_BYTES + sink_desc_len) { 740 codec_info(codec, "HDMI ATI/AMD: no audio descriptors for ELD\n"); 741 return -EINVAL; 742 } 743 744 /* 745 * HDMI VSDB latency format: 746 * separately for both audio and video: 747 * 0 field not valid or unknown latency 748 * [1..251] msecs = (x-1)*2 (max 500ms with x = 251 = 0xfb) 749 * 255 audio/video not supported 750 * 751 * HDA latency format: 752 * single value indicating video latency relative to audio: 753 * 0 unknown or 0ms 754 * [1..250] msecs = x*2 (max 500ms with x = 250 = 0xfa) 755 * [251..255] reserved 756 */ 757 aud_synch = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_VIDEO_DELAY, 0); 758 if ((aud_synch & ATI_DELAY_VIDEO_LATENCY) && (aud_synch & ATI_DELAY_AUDIO_LATENCY)) { 759 int video_latency_hdmi = (aud_synch & ATI_DELAY_VIDEO_LATENCY); 760 int audio_latency_hdmi = (aud_synch & ATI_DELAY_AUDIO_LATENCY) >> 8; 761 762 if (video_latency_hdmi <= 0xfb && audio_latency_hdmi <= 0xfb && 763 video_latency_hdmi > audio_latency_hdmi) 764 buf[6] = video_latency_hdmi - audio_latency_hdmi; 765 /* else unknown/invalid or 0ms or video ahead of audio, so use zero */ 766 } 767 768 /* SAD count */ 769 buf[5] |= ((pos - ELD_FIXED_BYTES - sink_desc_len) / 3) << 4; 770 771 /* Baseline ELD block length is 4-byte aligned */ 772 pos = round_up(pos, 4); 773 774 /* Baseline ELD length (4-byte header is not counted in) */ 775 buf[2] = (pos - 4) / 4; 776 777 *eld_size = pos; 778 779 return 0; 780 } 781