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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 "hda_codec.h"
30#include "hda_local.h"
31
32enum eld_versions {
33 ELD_VER_CEA_861D = 2,
34 ELD_VER_PARTIAL = 31,
35};
36
37enum cea_edid_versions {
38 CEA_EDID_VER_NONE = 0,
39 CEA_EDID_VER_CEA861 = 1,
40 CEA_EDID_VER_CEA861A = 2,
41 CEA_EDID_VER_CEA861BCD = 3,
42 CEA_EDID_VER_RESERVED = 4,
43};
44
45static char *cea_speaker_allocation_names[] = {
46 /* 0 */ "FL/FR",
47 /* 1 */ "LFE",
48 /* 2 */ "FC",
49 /* 3 */ "RL/RR",
50 /* 4 */ "RC",
51 /* 5 */ "FLC/FRC",
52 /* 6 */ "RLC/RRC",
53 /* 7 */ "FLW/FRW",
54 /* 8 */ "FLH/FRH",
55 /* 9 */ "TC",
56 /* 10 */ "FCH",
57};
58
59static char *eld_connection_type_names[4] = {
60 "HDMI",
61 "DisplayPort",
62 "2-reserved",
63 "3-reserved"
64};
65
66enum cea_audio_coding_types {
67 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
68 AUDIO_CODING_TYPE_LPCM = 1,
69 AUDIO_CODING_TYPE_AC3 = 2,
70 AUDIO_CODING_TYPE_MPEG1 = 3,
71 AUDIO_CODING_TYPE_MP3 = 4,
72 AUDIO_CODING_TYPE_MPEG2 = 5,
73 AUDIO_CODING_TYPE_AACLC = 6,
74 AUDIO_CODING_TYPE_DTS = 7,
75 AUDIO_CODING_TYPE_ATRAC = 8,
76 AUDIO_CODING_TYPE_SACD = 9,
77 AUDIO_CODING_TYPE_EAC3 = 10,
78 AUDIO_CODING_TYPE_DTS_HD = 11,
79 AUDIO_CODING_TYPE_MLP = 12,
80 AUDIO_CODING_TYPE_DST = 13,
81 AUDIO_CODING_TYPE_WMAPRO = 14,
82 AUDIO_CODING_TYPE_REF_CXT = 15,
83 /* also include valid xtypes below */
84 AUDIO_CODING_TYPE_HE_AAC = 15,
85 AUDIO_CODING_TYPE_HE_AAC2 = 16,
86 AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
87};
88
89enum cea_audio_coding_xtypes {
90 AUDIO_CODING_XTYPE_HE_REF_CT = 0,
91 AUDIO_CODING_XTYPE_HE_AAC = 1,
92 AUDIO_CODING_XTYPE_HE_AAC2 = 2,
93 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
94 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
95};
96
97static char *cea_audio_coding_type_names[] = {
98 /* 0 */ "undefined",
99 /* 1 */ "LPCM",
100 /* 2 */ "AC-3",
101 /* 3 */ "MPEG1",
102 /* 4 */ "MP3",
103 /* 5 */ "MPEG2",
104 /* 6 */ "AAC-LC",
105 /* 7 */ "DTS",
106 /* 8 */ "ATRAC",
107 /* 9 */ "DSD (One Bit Audio)",
108 /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
109 /* 11 */ "DTS-HD",
110 /* 12 */ "MLP (Dolby TrueHD)",
111 /* 13 */ "DST",
112 /* 14 */ "WMAPro",
113 /* 15 */ "HE-AAC",
114 /* 16 */ "HE-AACv2",
115 /* 17 */ "MPEG Surround",
116};
117
118/*
119 * The following two lists are shared between
120 * - HDMI audio InfoFrame (source to sink)
121 * - CEA E-EDID Extension (sink to source)
122 */
123
124/*
125 * SS1:SS0 index => sample size
126 */
127static int cea_sample_sizes[4] = {
128 0, /* 0: Refer to Stream Header */
129 AC_SUPPCM_BITS_16, /* 1: 16 bits */
130 AC_SUPPCM_BITS_20, /* 2: 20 bits */
131 AC_SUPPCM_BITS_24, /* 3: 24 bits */
132};
133
134/*
135 * SF2:SF1:SF0 index => sampling frequency
136 */
137static int cea_sampling_frequencies[8] = {
138 0, /* 0: Refer to Stream Header */
139 SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
140 SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
141 SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
142 SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
143 SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
144 SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
145 SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
146};
147
148static unsigned int hdmi_get_eld_data(struct hda_codec *codec, hda_nid_t nid,
149 int byte_index)
150{
151 unsigned int val;
152
153 val = snd_hda_codec_read(codec, nid, 0,
154 AC_VERB_GET_HDMI_ELDD, byte_index);
155#ifdef BE_PARANOID
156 codec_info(codec, "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
157#endif
158 return val;
159}
160
161#define GRAB_BITS(buf, byte, lowbit, bits) \
162({ \
163 BUILD_BUG_ON(lowbit > 7); \
164 BUILD_BUG_ON(bits > 8); \
165 BUILD_BUG_ON(bits <= 0); \
166 \
167 (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
168})
169
170static void hdmi_update_short_audio_desc(struct cea_sad *a,
171 const unsigned char *buf)
172{
173 int i;
174 int val;
175
176 val = GRAB_BITS(buf, 1, 0, 7);
177 a->rates = 0;
178 for (i = 0; i < 7; i++)
179 if (val & (1 << i))
180 a->rates |= cea_sampling_frequencies[i + 1];
181
182 a->channels = GRAB_BITS(buf, 0, 0, 3);
183 a->channels++;
184
185 a->sample_bits = 0;
186 a->max_bitrate = 0;
187
188 a->format = GRAB_BITS(buf, 0, 3, 4);
189 switch (a->format) {
190 case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
191 snd_printd(KERN_INFO
192 "HDMI: audio coding type 0 not expected\n");
193 break;
194
195 case AUDIO_CODING_TYPE_LPCM:
196 val = GRAB_BITS(buf, 2, 0, 3);
197 for (i = 0; i < 3; i++)
198 if (val & (1 << i))
199 a->sample_bits |= cea_sample_sizes[i + 1];
200 break;
201
202 case AUDIO_CODING_TYPE_AC3:
203 case AUDIO_CODING_TYPE_MPEG1:
204 case AUDIO_CODING_TYPE_MP3:
205 case AUDIO_CODING_TYPE_MPEG2:
206 case AUDIO_CODING_TYPE_AACLC:
207 case AUDIO_CODING_TYPE_DTS:
208 case AUDIO_CODING_TYPE_ATRAC:
209 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
210 a->max_bitrate *= 8000;
211 break;
212
213 case AUDIO_CODING_TYPE_SACD:
214 break;
215
216 case AUDIO_CODING_TYPE_EAC3:
217 break;
218
219 case AUDIO_CODING_TYPE_DTS_HD:
220 break;
221
222 case AUDIO_CODING_TYPE_MLP:
223 break;
224
225 case AUDIO_CODING_TYPE_DST:
226 break;
227
228 case AUDIO_CODING_TYPE_WMAPRO:
229 a->profile = GRAB_BITS(buf, 2, 0, 3);
230 break;
231
232 case AUDIO_CODING_TYPE_REF_CXT:
233 a->format = GRAB_BITS(buf, 2, 3, 5);
234 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT ||
235 a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
236 snd_printd(KERN_INFO
237 "HDMI: audio coding xtype %d not expected\n",
238 a->format);
239 a->format = 0;
240 } else
241 a->format += AUDIO_CODING_TYPE_HE_AAC -
242 AUDIO_CODING_XTYPE_HE_AAC;
243 break;
244 }
245}
246
247/*
248 * Be careful, ELD buf could be totally rubbish!
249 */
250int snd_hdmi_parse_eld(struct parsed_hdmi_eld *e,
251 const unsigned char *buf, int size)
252{
253 int mnl;
254 int i;
255
256 e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
257 if (e->eld_ver != ELD_VER_CEA_861D &&
258 e->eld_ver != ELD_VER_PARTIAL) {
259 snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
260 e->eld_ver);
261 goto out_fail;
262 }
263
264 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
265 mnl = GRAB_BITS(buf, 4, 0, 5);
266 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
267
268 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
269 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
270 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
271 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
272
273 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
274 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
275
276 e->port_id = get_unaligned_le64(buf + 8);
277
278 /* not specified, but the spec's tendency is little endian */
279 e->manufacture_id = get_unaligned_le16(buf + 16);
280 e->product_id = get_unaligned_le16(buf + 18);
281
282 if (mnl > ELD_MAX_MNL) {
283 snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
284 goto out_fail;
285 } else if (ELD_FIXED_BYTES + mnl > size) {
286 snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
287 goto out_fail;
288 } else
289 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl + 1);
290
291 for (i = 0; i < e->sad_count; i++) {
292 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
293 snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
294 goto out_fail;
295 }
296 hdmi_update_short_audio_desc(e->sad + i,
297 buf + ELD_FIXED_BYTES + mnl + 3 * i);
298 }
299
300 /*
301 * HDMI sink's ELD info cannot always be retrieved for now, e.g.
302 * in console or for audio devices. Assume the highest speakers
303 * configuration, to _not_ prohibit multi-channel audio playback.
304 */
305 if (!e->spk_alloc)
306 e->spk_alloc = 0xffff;
307
308 return 0;
309
310out_fail:
311 return -EINVAL;
312}
313
314int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
315{
316 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
317 AC_DIPSIZE_ELD_BUF);
318}
319
320int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,
321 unsigned char *buf, int *eld_size)
322{
323 int i;
324 int ret = 0;
325 int size;
326
327 /*
328 * ELD size is initialized to zero in caller function. If no errors and
329 * ELD is valid, actual eld_size is assigned.
330 */
331
332 size = snd_hdmi_get_eld_size(codec, nid);
333 if (size == 0) {
334 /* wfg: workaround for ASUS P5E-VM HDMI board */
335 codec_info(codec, "HDMI: ELD buf size is 0, force 128\n");
336 size = 128;
337 }
338 if (size < ELD_FIXED_BYTES || size > ELD_MAX_SIZE) {
339 codec_info(codec, "HDMI: invalid ELD buf size %d\n", size);
340 return -ERANGE;
341 }
342
343 /* set ELD buffer */
344 for (i = 0; i < size; i++) {
345 unsigned int val = hdmi_get_eld_data(codec, nid, i);
346 /*
347 * Graphics driver might be writing to ELD buffer right now.
348 * Just abort. The caller will repoll after a while.
349 */
350 if (!(val & AC_ELDD_ELD_VALID)) {
351 codec_info(codec, "HDMI: invalid ELD data byte %d\n", i);
352 ret = -EINVAL;
353 goto error;
354 }
355 val &= AC_ELDD_ELD_DATA;
356 /*
357 * The first byte cannot be zero. This can happen on some DVI
358 * connections. Some Intel chips may also need some 250ms delay
359 * to return non-zero ELD data, even when the graphics driver
360 * correctly writes ELD content before setting ELD_valid bit.
361 */
362 if (!val && !i) {
363 codec_dbg(codec, "HDMI: 0 ELD data\n");
364 ret = -EINVAL;
365 goto error;
366 }
367 buf[i] = val;
368 }
369
370 *eld_size = size;
371error:
372 return ret;
373}
374
375/**
376 * SNDRV_PCM_RATE_* and AC_PAR_PCM values don't match, print correct rates with
377 * hdmi-specific routine.
378 */
379static void hdmi_print_pcm_rates(int pcm, char *buf, int buflen)
380{
381 static unsigned int alsa_rates[] = {
382 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
383 88200, 96000, 176400, 192000, 384000
384 };
385 int i, j;
386
387 for (i = 0, j = 0; i < ARRAY_SIZE(alsa_rates); i++)
388 if (pcm & (1 << i))
389 j += snprintf(buf + j, buflen - j, " %d",
390 alsa_rates[i]);
391
392 buf[j] = '\0'; /* necessary when j == 0 */
393}
394
395#define SND_PRINT_RATES_ADVISED_BUFSIZE 80
396
397static void hdmi_show_short_audio_desc(struct cea_sad *a)
398{
399 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
400 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
401
402 if (!a->format)
403 return;
404
405 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf));
406
407 if (a->format == AUDIO_CODING_TYPE_LPCM)
408 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8);
409 else if (a->max_bitrate)
410 snprintf(buf2, sizeof(buf2),
411 ", max bitrate = %d", a->max_bitrate);
412 else
413 buf2[0] = '\0';
414
415 _snd_printd(SND_PR_VERBOSE, "HDMI: supports coding type %s:"
416 " channels = %d, rates =%s%s\n",
417 cea_audio_coding_type_names[a->format],
418 a->channels,
419 buf,
420 buf2);
421}
422
423void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
424{
425 int i, j;
426
427 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
428 if (spk_alloc & (1 << i))
429 j += snprintf(buf + j, buflen - j, " %s",
430 cea_speaker_allocation_names[i]);
431 }
432 buf[j] = '\0'; /* necessary when j == 0 */
433}
434
435void snd_hdmi_show_eld(struct parsed_hdmi_eld *e)
436{
437 int i;
438
439 _snd_printd(SND_PR_VERBOSE, "HDMI: detected monitor %s at connection type %s\n",
440 e->monitor_name,
441 eld_connection_type_names[e->conn_type]);
442
443 if (e->spk_alloc) {
444 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
445 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
446 _snd_printd(SND_PR_VERBOSE, "HDMI: available speakers:%s\n", buf);
447 }
448
449 for (i = 0; i < e->sad_count; i++)
450 hdmi_show_short_audio_desc(e->sad + i);
451}
452
453#ifdef CONFIG_PROC_FS
454
455static void hdmi_print_sad_info(int i, struct cea_sad *a,
456 struct snd_info_buffer *buffer)
457{
458 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
459
460 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
461 i, a->format, cea_audio_coding_type_names[a->format]);
462 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
463
464 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf));
465 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
466
467 if (a->format == AUDIO_CODING_TYPE_LPCM) {
468 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
469 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
470 i, a->sample_bits, buf);
471 }
472
473 if (a->max_bitrate)
474 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
475 i, a->max_bitrate);
476
477 if (a->profile)
478 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
479}
480
481void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
482 struct snd_info_buffer *buffer)
483{
484 struct parsed_hdmi_eld *e = &eld->info;
485 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
486 int i;
487 static char *eld_version_names[32] = {
488 "reserved",
489 "reserved",
490 "CEA-861D or below",
491 [3 ... 30] = "reserved",
492 [31] = "partial"
493 };
494 static char *cea_edid_version_names[8] = {
495 "no CEA EDID Timing Extension block present",
496 "CEA-861",
497 "CEA-861-A",
498 "CEA-861-B, C or D",
499 [4 ... 7] = "reserved"
500 };
501
502 snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
503 snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
504 if (!eld->eld_valid)
505 return;
506 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
507 snd_iprintf(buffer, "connection_type\t\t%s\n",
508 eld_connection_type_names[e->conn_type]);
509 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
510 eld_version_names[e->eld_ver]);
511 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
512 cea_edid_version_names[e->cea_edid_ver]);
513 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
514 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
515 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
516 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
517 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
518 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
519
520 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
521 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
522
523 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
524
525 for (i = 0; i < e->sad_count; i++)
526 hdmi_print_sad_info(i, e->sad + i, buffer);
527}
528
529void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
530 struct snd_info_buffer *buffer)
531{
532 struct parsed_hdmi_eld *e = &eld->info;
533 char line[64];
534 char name[64];
535 char *sname;
536 long long val;
537 unsigned int n;
538
539 while (!snd_info_get_line(buffer, line, sizeof(line))) {
540 if (sscanf(line, "%s %llx", name, &val) != 2)
541 continue;
542 /*
543 * We don't allow modification to these fields:
544 * monitor_name manufacture_id product_id
545 * eld_version edid_version
546 */
547 if (!strcmp(name, "monitor_present"))
548 eld->monitor_present = val;
549 else if (!strcmp(name, "eld_valid"))
550 eld->eld_valid = val;
551 else if (!strcmp(name, "connection_type"))
552 e->conn_type = val;
553 else if (!strcmp(name, "port_id"))
554 e->port_id = val;
555 else if (!strcmp(name, "support_hdcp"))
556 e->support_hdcp = val;
557 else if (!strcmp(name, "support_ai"))
558 e->support_ai = val;
559 else if (!strcmp(name, "audio_sync_delay"))
560 e->aud_synch_delay = val;
561 else if (!strcmp(name, "speakers"))
562 e->spk_alloc = val;
563 else if (!strcmp(name, "sad_count"))
564 e->sad_count = val;
565 else if (!strncmp(name, "sad", 3)) {
566 sname = name + 4;
567 n = name[3] - '0';
568 if (name[4] >= '0' && name[4] <= '9') {
569 sname++;
570 n = 10 * n + name[4] - '0';
571 }
572 if (n >= ELD_MAX_SAD)
573 continue;
574 if (!strcmp(sname, "_coding_type"))
575 e->sad[n].format = val;
576 else if (!strcmp(sname, "_channels"))
577 e->sad[n].channels = val;
578 else if (!strcmp(sname, "_rates"))
579 e->sad[n].rates = val;
580 else if (!strcmp(sname, "_bits"))
581 e->sad[n].sample_bits = val;
582 else if (!strcmp(sname, "_max_bitrate"))
583 e->sad[n].max_bitrate = val;
584 else if (!strcmp(sname, "_profile"))
585 e->sad[n].profile = val;
586 if (n >= e->sad_count)
587 e->sad_count = n + 1;
588 }
589 }
590}
591#endif /* CONFIG_PROC_FS */
592
593/* update PCM info based on ELD */
594void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
595 struct hda_pcm_stream *hinfo)
596{
597 u32 rates;
598 u64 formats;
599 unsigned int maxbps;
600 unsigned int channels_max;
601 int i;
602
603 /* assume basic audio support (the basic audio flag is not in ELD;
604 * however, all audio capable sinks are required to support basic
605 * audio) */
606 rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
607 SNDRV_PCM_RATE_48000;
608 formats = SNDRV_PCM_FMTBIT_S16_LE;
609 maxbps = 16;
610 channels_max = 2;
611 for (i = 0; i < e->sad_count; i++) {
612 struct cea_sad *a = &e->sad[i];
613 rates |= a->rates;
614 if (a->channels > channels_max)
615 channels_max = a->channels;
616 if (a->format == AUDIO_CODING_TYPE_LPCM) {
617 if (a->sample_bits & AC_SUPPCM_BITS_20) {
618 formats |= SNDRV_PCM_FMTBIT_S32_LE;
619 if (maxbps < 20)
620 maxbps = 20;
621 }
622 if (a->sample_bits & AC_SUPPCM_BITS_24) {
623 formats |= SNDRV_PCM_FMTBIT_S32_LE;
624 if (maxbps < 24)
625 maxbps = 24;
626 }
627 }
628 }
629
630 /* restrict the parameters by the values the codec provides */
631 hinfo->rates &= rates;
632 hinfo->formats &= formats;
633 hinfo->maxbps = min(hinfo->maxbps, maxbps);
634 hinfo->channels_max = min(hinfo->channels_max, channels_max);
635}
636
637
638/* ATI/AMD specific stuff (ELD emulation) */
639
640#define ATI_VERB_SET_AUDIO_DESCRIPTOR 0x776
641#define ATI_VERB_SET_SINK_INFO_INDEX 0x780
642#define ATI_VERB_GET_SPEAKER_ALLOCATION 0xf70
643#define ATI_VERB_GET_AUDIO_DESCRIPTOR 0xf76
644#define ATI_VERB_GET_AUDIO_VIDEO_DELAY 0xf7b
645#define ATI_VERB_GET_SINK_INFO_INDEX 0xf80
646#define ATI_VERB_GET_SINK_INFO_DATA 0xf81
647
648#define ATI_SPKALLOC_SPKALLOC 0x007f
649#define ATI_SPKALLOC_TYPE_HDMI 0x0100
650#define ATI_SPKALLOC_TYPE_DISPLAYPORT 0x0200
651
652/* first three bytes are just standard SAD */
653#define ATI_AUDIODESC_CHANNELS 0x00000007
654#define ATI_AUDIODESC_RATES 0x0000ff00
655#define ATI_AUDIODESC_LPCM_STEREO_RATES 0xff000000
656
657/* in standard HDMI VSDB format */
658#define ATI_DELAY_VIDEO_LATENCY 0x000000ff
659#define ATI_DELAY_AUDIO_LATENCY 0x0000ff00
660
661enum ati_sink_info_idx {
662 ATI_INFO_IDX_MANUFACTURER_ID = 0,
663 ATI_INFO_IDX_PRODUCT_ID = 1,
664 ATI_INFO_IDX_SINK_DESC_LEN = 2,
665 ATI_INFO_IDX_PORT_ID_LOW = 3,
666 ATI_INFO_IDX_PORT_ID_HIGH = 4,
667 ATI_INFO_IDX_SINK_DESC_FIRST = 5,
668 ATI_INFO_IDX_SINK_DESC_LAST = 22, /* max len 18 bytes */
669};
670
671int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid,
672 unsigned char *buf, int *eld_size, bool rev3_or_later)
673{
674 int spkalloc, ati_sad, aud_synch;
675 int sink_desc_len = 0;
676 int pos, i;
677
678 /* ATI/AMD does not have ELD, emulate it */
679
680 spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0);
681
682 if (spkalloc <= 0) {
683 codec_info(codec, "HDMI ATI/AMD: no speaker allocation for ELD\n");
684 return -EINVAL;
685 }
686
687 memset(buf, 0, ELD_FIXED_BYTES + ELD_MAX_MNL + ELD_MAX_SAD * 3);
688
689 /* version */
690 buf[0] = ELD_VER_CEA_861D << 3;
691
692 /* speaker allocation from EDID */
693 buf[7] = spkalloc & ATI_SPKALLOC_SPKALLOC;
694
695 /* is DisplayPort? */
696 if (spkalloc & ATI_SPKALLOC_TYPE_DISPLAYPORT)
697 buf[5] |= 0x04;
698
699 pos = ELD_FIXED_BYTES;
700
701 if (rev3_or_later) {
702 int sink_info;
703
704 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_LOW);
705 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
706 put_unaligned_le32(sink_info, buf + 8);
707
708 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_HIGH);
709 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
710 put_unaligned_le32(sink_info, buf + 12);
711
712 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_MANUFACTURER_ID);
713 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
714 put_unaligned_le16(sink_info, buf + 16);
715
716 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PRODUCT_ID);
717 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
718 put_unaligned_le16(sink_info, buf + 18);
719
720 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_LEN);
721 sink_desc_len = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
722
723 if (sink_desc_len > ELD_MAX_MNL) {
724 codec_info(codec, "HDMI ATI/AMD: Truncating HDMI sink description with length %d\n",
725 sink_desc_len);
726 sink_desc_len = ELD_MAX_MNL;
727 }
728
729 buf[4] |= sink_desc_len;
730
731 for (i = 0; i < sink_desc_len; i++) {
732 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_FIRST + i);
733 buf[pos++] = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
734 }
735 }
736
737 for (i = AUDIO_CODING_TYPE_LPCM; i <= AUDIO_CODING_TYPE_WMAPRO; i++) {
738 if (i == AUDIO_CODING_TYPE_SACD || i == AUDIO_CODING_TYPE_DST)
739 continue; /* not handled by ATI/AMD */
740
741 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3);
742 ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0);
743
744 if (ati_sad <= 0)
745 continue;
746
747 if (ati_sad & ATI_AUDIODESC_RATES) {
748 /* format is supported, copy SAD as-is */
749 buf[pos++] = (ati_sad & 0x0000ff) >> 0;
750 buf[pos++] = (ati_sad & 0x00ff00) >> 8;
751 buf[pos++] = (ati_sad & 0xff0000) >> 16;
752 }
753
754 if (i == AUDIO_CODING_TYPE_LPCM
755 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES)
756 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) >> 16 != (ati_sad & ATI_AUDIODESC_RATES)) {
757 /* for PCM there is a separate stereo rate mask */
758 buf[pos++] = ((ati_sad & 0x000000ff) & ~ATI_AUDIODESC_CHANNELS) | 0x1;
759 /* rates from the extra byte */
760 buf[pos++] = (ati_sad & 0xff000000) >> 24;
761 buf[pos++] = (ati_sad & 0x00ff0000) >> 16;
762 }
763 }
764
765 if (pos == ELD_FIXED_BYTES + sink_desc_len) {
766 codec_info(codec, "HDMI ATI/AMD: no audio descriptors for ELD\n");
767 return -EINVAL;
768 }
769
770 /*
771 * HDMI VSDB latency format:
772 * separately for both audio and video:
773 * 0 field not valid or unknown latency
774 * [1..251] msecs = (x-1)*2 (max 500ms with x = 251 = 0xfb)
775 * 255 audio/video not supported
776 *
777 * HDA latency format:
778 * single value indicating video latency relative to audio:
779 * 0 unknown or 0ms
780 * [1..250] msecs = x*2 (max 500ms with x = 250 = 0xfa)
781 * [251..255] reserved
782 */
783 aud_synch = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_VIDEO_DELAY, 0);
784 if ((aud_synch & ATI_DELAY_VIDEO_LATENCY) && (aud_synch & ATI_DELAY_AUDIO_LATENCY)) {
785 int video_latency_hdmi = (aud_synch & ATI_DELAY_VIDEO_LATENCY);
786 int audio_latency_hdmi = (aud_synch & ATI_DELAY_AUDIO_LATENCY) >> 8;
787
788 if (video_latency_hdmi <= 0xfb && audio_latency_hdmi <= 0xfb &&
789 video_latency_hdmi > audio_latency_hdmi)
790 buf[6] = video_latency_hdmi - audio_latency_hdmi;
791 /* else unknown/invalid or 0ms or video ahead of audio, so use zero */
792 }
793
794 /* SAD count */
795 buf[5] |= ((pos - ELD_FIXED_BYTES - sink_desc_len) / 3) << 4;
796
797 /* Baseline ELD block length is 4-byte aligned */
798 pos = round_up(pos, 4);
799
800 /* Baseline ELD length (4-byte header is not counted in) */
801 buf[2] = (pos - 4) / 4;
802
803 *eld_size = pos;
804
805 return 0;
806}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Generic routines and proc interface for ELD(EDID Like Data) information
4 *
5 * Copyright(c) 2008 Intel Corporation.
6 * Copyright (c) 2013 Anssi Hannula <anssi.hannula@iki.fi>
7 *
8 * Authors:
9 * Wu Fengguang <wfg@linux.intel.com>
10 */
11
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <sound/core.h>
15#include <linux/unaligned.h>
16#include <sound/hda_chmap.h>
17#include <sound/hda_codec.h>
18#include "hda_local.h"
19
20enum eld_versions {
21 ELD_VER_CEA_861D = 2,
22 ELD_VER_PARTIAL = 31,
23};
24
25enum cea_edid_versions {
26 CEA_EDID_VER_NONE = 0,
27 CEA_EDID_VER_CEA861 = 1,
28 CEA_EDID_VER_CEA861A = 2,
29 CEA_EDID_VER_CEA861BCD = 3,
30 CEA_EDID_VER_RESERVED = 4,
31};
32
33static const char * const eld_connection_type_names[4] = {
34 "HDMI",
35 "DisplayPort",
36 "2-reserved",
37 "3-reserved"
38};
39
40enum cea_audio_coding_types {
41 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
42 AUDIO_CODING_TYPE_LPCM = 1,
43 AUDIO_CODING_TYPE_AC3 = 2,
44 AUDIO_CODING_TYPE_MPEG1 = 3,
45 AUDIO_CODING_TYPE_MP3 = 4,
46 AUDIO_CODING_TYPE_MPEG2 = 5,
47 AUDIO_CODING_TYPE_AACLC = 6,
48 AUDIO_CODING_TYPE_DTS = 7,
49 AUDIO_CODING_TYPE_ATRAC = 8,
50 AUDIO_CODING_TYPE_SACD = 9,
51 AUDIO_CODING_TYPE_EAC3 = 10,
52 AUDIO_CODING_TYPE_DTS_HD = 11,
53 AUDIO_CODING_TYPE_MLP = 12,
54 AUDIO_CODING_TYPE_DST = 13,
55 AUDIO_CODING_TYPE_WMAPRO = 14,
56 AUDIO_CODING_TYPE_REF_CXT = 15,
57 /* also include valid xtypes below */
58 AUDIO_CODING_TYPE_HE_AAC = 15,
59 AUDIO_CODING_TYPE_HE_AAC2 = 16,
60 AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
61};
62
63enum cea_audio_coding_xtypes {
64 AUDIO_CODING_XTYPE_HE_REF_CT = 0,
65 AUDIO_CODING_XTYPE_HE_AAC = 1,
66 AUDIO_CODING_XTYPE_HE_AAC2 = 2,
67 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
68 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
69};
70
71static const char * const cea_audio_coding_type_names[] = {
72 /* 0 */ "undefined",
73 /* 1 */ "LPCM",
74 /* 2 */ "AC-3",
75 /* 3 */ "MPEG1",
76 /* 4 */ "MP3",
77 /* 5 */ "MPEG2",
78 /* 6 */ "AAC-LC",
79 /* 7 */ "DTS",
80 /* 8 */ "ATRAC",
81 /* 9 */ "DSD (One Bit Audio)",
82 /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
83 /* 11 */ "DTS-HD",
84 /* 12 */ "MLP (Dolby TrueHD)",
85 /* 13 */ "DST",
86 /* 14 */ "WMAPro",
87 /* 15 */ "HE-AAC",
88 /* 16 */ "HE-AACv2",
89 /* 17 */ "MPEG Surround",
90};
91
92/*
93 * The following two lists are shared between
94 * - HDMI audio InfoFrame (source to sink)
95 * - CEA E-EDID Extension (sink to source)
96 */
97
98/*
99 * SS1:SS0 index => sample size
100 */
101static const int cea_sample_sizes[4] = {
102 0, /* 0: Refer to Stream Header */
103 AC_SUPPCM_BITS_16, /* 1: 16 bits */
104 AC_SUPPCM_BITS_20, /* 2: 20 bits */
105 AC_SUPPCM_BITS_24, /* 3: 24 bits */
106};
107
108/*
109 * SF2:SF1:SF0 index => sampling frequency
110 */
111static const int cea_sampling_frequencies[8] = {
112 0, /* 0: Refer to Stream Header */
113 SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
114 SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
115 SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
116 SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
117 SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
118 SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
119 SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
120};
121
122static unsigned int hdmi_get_eld_data(struct hda_codec *codec, hda_nid_t nid,
123 int byte_index)
124{
125 unsigned int val;
126
127 val = snd_hda_codec_read(codec, nid, 0,
128 AC_VERB_GET_HDMI_ELDD, byte_index);
129#ifdef BE_PARANOID
130 codec_info(codec, "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
131#endif
132 return val;
133}
134
135#define GRAB_BITS(buf, byte, lowbit, bits) \
136({ \
137 BUILD_BUG_ON(lowbit > 7); \
138 BUILD_BUG_ON(bits > 8); \
139 BUILD_BUG_ON(bits <= 0); \
140 \
141 (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
142})
143
144static void hdmi_update_short_audio_desc(struct hda_codec *codec,
145 struct cea_sad *a,
146 const unsigned char *buf)
147{
148 int i;
149 int val;
150
151 val = GRAB_BITS(buf, 1, 0, 7);
152 a->rates = 0;
153 for (i = 0; i < 7; i++)
154 if (val & (1 << i))
155 a->rates |= cea_sampling_frequencies[i + 1];
156
157 a->channels = GRAB_BITS(buf, 0, 0, 3);
158 a->channels++;
159
160 a->sample_bits = 0;
161 a->max_bitrate = 0;
162
163 a->format = GRAB_BITS(buf, 0, 3, 4);
164 switch (a->format) {
165 case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
166 codec_info(codec, "HDMI: audio coding type 0 not expected\n");
167 break;
168
169 case AUDIO_CODING_TYPE_LPCM:
170 val = GRAB_BITS(buf, 2, 0, 3);
171 for (i = 0; i < 3; i++)
172 if (val & (1 << i))
173 a->sample_bits |= cea_sample_sizes[i + 1];
174 break;
175
176 case AUDIO_CODING_TYPE_AC3:
177 case AUDIO_CODING_TYPE_MPEG1:
178 case AUDIO_CODING_TYPE_MP3:
179 case AUDIO_CODING_TYPE_MPEG2:
180 case AUDIO_CODING_TYPE_AACLC:
181 case AUDIO_CODING_TYPE_DTS:
182 case AUDIO_CODING_TYPE_ATRAC:
183 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
184 a->max_bitrate *= 8000;
185 break;
186
187 case AUDIO_CODING_TYPE_SACD:
188 break;
189
190 case AUDIO_CODING_TYPE_EAC3:
191 break;
192
193 case AUDIO_CODING_TYPE_DTS_HD:
194 break;
195
196 case AUDIO_CODING_TYPE_MLP:
197 break;
198
199 case AUDIO_CODING_TYPE_DST:
200 break;
201
202 case AUDIO_CODING_TYPE_WMAPRO:
203 a->profile = GRAB_BITS(buf, 2, 0, 3);
204 break;
205
206 case AUDIO_CODING_TYPE_REF_CXT:
207 a->format = GRAB_BITS(buf, 2, 3, 5);
208 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT ||
209 a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
210 codec_info(codec,
211 "HDMI: audio coding xtype %d not expected\n",
212 a->format);
213 a->format = 0;
214 } else
215 a->format += AUDIO_CODING_TYPE_HE_AAC -
216 AUDIO_CODING_XTYPE_HE_AAC;
217 break;
218 }
219}
220
221/*
222 * Be careful, ELD buf could be totally rubbish!
223 */
224int snd_hdmi_parse_eld(struct hda_codec *codec, struct parsed_hdmi_eld *e,
225 const unsigned char *buf, int size)
226{
227 int mnl;
228 int i;
229
230 memset(e, 0, sizeof(*e));
231 e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
232 if (e->eld_ver != ELD_VER_CEA_861D &&
233 e->eld_ver != ELD_VER_PARTIAL) {
234 codec_info(codec, "HDMI: Unknown ELD version %d\n", e->eld_ver);
235 goto out_fail;
236 }
237
238 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
239 mnl = GRAB_BITS(buf, 4, 0, 5);
240 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
241
242 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
243 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
244 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
245 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
246
247 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
248 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
249
250 e->port_id = get_unaligned_le64(buf + 8);
251
252 /* not specified, but the spec's tendency is little endian */
253 e->manufacture_id = get_unaligned_le16(buf + 16);
254 e->product_id = get_unaligned_le16(buf + 18);
255
256 if (mnl > ELD_MAX_MNL) {
257 codec_info(codec, "HDMI: MNL is reserved value %d\n", mnl);
258 goto out_fail;
259 } else if (ELD_FIXED_BYTES + mnl > size) {
260 codec_info(codec, "HDMI: out of range MNL %d\n", mnl);
261 goto out_fail;
262 } else
263 strscpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl + 1);
264
265 for (i = 0; i < e->sad_count; i++) {
266 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
267 codec_info(codec, "HDMI: out of range SAD %d\n", i);
268 goto out_fail;
269 }
270 hdmi_update_short_audio_desc(codec, e->sad + i,
271 buf + ELD_FIXED_BYTES + mnl + 3 * i);
272 }
273
274 /*
275 * HDMI sink's ELD info cannot always be retrieved for now, e.g.
276 * in console or for audio devices. Assume the highest speakers
277 * configuration, to _not_ prohibit multi-channel audio playback.
278 */
279 if (!e->spk_alloc)
280 e->spk_alloc = 0xffff;
281
282 return 0;
283
284out_fail:
285 return -EINVAL;
286}
287
288int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
289{
290 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
291 AC_DIPSIZE_ELD_BUF);
292}
293
294int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,
295 unsigned char *buf, int *eld_size)
296{
297 int i;
298 int ret = 0;
299 int size;
300
301 /*
302 * ELD size is initialized to zero in caller function. If no errors and
303 * ELD is valid, actual eld_size is assigned.
304 */
305
306 size = snd_hdmi_get_eld_size(codec, nid);
307 if (size == 0) {
308 /* wfg: workaround for ASUS P5E-VM HDMI board */
309 codec_info(codec, "HDMI: ELD buf size is 0, force 128\n");
310 size = 128;
311 }
312 if (size < ELD_FIXED_BYTES || size > ELD_MAX_SIZE) {
313 codec_info(codec, "HDMI: invalid ELD buf size %d\n", size);
314 return -ERANGE;
315 }
316
317 /* set ELD buffer */
318 for (i = 0; i < size; i++) {
319 unsigned int val = hdmi_get_eld_data(codec, nid, i);
320 /*
321 * Graphics driver might be writing to ELD buffer right now.
322 * Just abort. The caller will repoll after a while.
323 */
324 if (!(val & AC_ELDD_ELD_VALID)) {
325 codec_info(codec, "HDMI: invalid ELD data byte %d\n", i);
326 ret = -EINVAL;
327 goto error;
328 }
329 val &= AC_ELDD_ELD_DATA;
330 /*
331 * The first byte cannot be zero. This can happen on some DVI
332 * connections. Some Intel chips may also need some 250ms delay
333 * to return non-zero ELD data, even when the graphics driver
334 * correctly writes ELD content before setting ELD_valid bit.
335 */
336 if (!val && !i) {
337 codec_dbg(codec, "HDMI: 0 ELD data\n");
338 ret = -EINVAL;
339 goto error;
340 }
341 buf[i] = val;
342 }
343
344 *eld_size = size;
345error:
346 return ret;
347}
348
349/*
350 * SNDRV_PCM_RATE_* and AC_PAR_PCM values don't match, print correct rates with
351 * hdmi-specific routine.
352 */
353static void hdmi_print_pcm_rates(int pcm, char *buf, int buflen)
354{
355 static const unsigned int alsa_rates[] = {
356 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
357 88200, 96000, 176400, 192000, 384000
358 };
359 int i, j;
360
361 for (i = 0, j = 0; i < ARRAY_SIZE(alsa_rates); i++)
362 if (pcm & (1 << i))
363 j += scnprintf(buf + j, buflen - j, " %d",
364 alsa_rates[i]);
365
366 buf[j] = '\0'; /* necessary when j == 0 */
367}
368
369#define SND_PRINT_RATES_ADVISED_BUFSIZE 80
370
371static void hdmi_show_short_audio_desc(struct hda_codec *codec,
372 struct cea_sad *a)
373{
374 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
375 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
376
377 if (!a->format)
378 return;
379
380 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf));
381
382 if (a->format == AUDIO_CODING_TYPE_LPCM)
383 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8);
384 else if (a->max_bitrate)
385 snprintf(buf2, sizeof(buf2),
386 ", max bitrate = %d", a->max_bitrate);
387 else
388 buf2[0] = '\0';
389
390 codec_dbg(codec,
391 "HDMI: supports coding type %s: channels = %d, rates =%s%s\n",
392 cea_audio_coding_type_names[a->format],
393 a->channels, buf, buf2);
394}
395
396void snd_hdmi_show_eld(struct hda_codec *codec, struct parsed_hdmi_eld *e)
397{
398 int i;
399
400 codec_dbg(codec, "HDMI: detected monitor %s at connection type %s\n",
401 e->monitor_name,
402 eld_connection_type_names[e->conn_type]);
403
404 if (e->spk_alloc) {
405 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
406 snd_hdac_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
407 codec_dbg(codec, "HDMI: available speakers:%s\n", buf);
408 }
409
410 for (i = 0; i < e->sad_count; i++)
411 hdmi_show_short_audio_desc(codec, e->sad + i);
412}
413
414#ifdef CONFIG_SND_PROC_FS
415
416static void hdmi_print_sad_info(int i, struct cea_sad *a,
417 struct snd_info_buffer *buffer)
418{
419 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
420
421 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
422 i, a->format, cea_audio_coding_type_names[a->format]);
423 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
424
425 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf));
426 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
427
428 if (a->format == AUDIO_CODING_TYPE_LPCM) {
429 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
430 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
431 i, a->sample_bits, buf);
432 }
433
434 if (a->max_bitrate)
435 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
436 i, a->max_bitrate);
437
438 if (a->profile)
439 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
440}
441
442void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
443 struct snd_info_buffer *buffer,
444 hda_nid_t pin_nid, int dev_id, hda_nid_t cvt_nid)
445{
446 struct parsed_hdmi_eld *e = &eld->info;
447 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
448 int i;
449 static const char * const eld_version_names[32] = {
450 "reserved",
451 "reserved",
452 "CEA-861D or below",
453 [3 ... 30] = "reserved",
454 [31] = "partial"
455 };
456 static const char * const cea_edid_version_names[8] = {
457 "no CEA EDID Timing Extension block present",
458 "CEA-861",
459 "CEA-861-A",
460 "CEA-861-B, C or D",
461 [4 ... 7] = "reserved"
462 };
463
464 snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
465 snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
466 snd_iprintf(buffer, "codec_pin_nid\t\t0x%x\n", pin_nid);
467 snd_iprintf(buffer, "codec_dev_id\t\t0x%x\n", dev_id);
468 snd_iprintf(buffer, "codec_cvt_nid\t\t0x%x\n", cvt_nid);
469 if (!eld->eld_valid)
470 return;
471 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
472 snd_iprintf(buffer, "connection_type\t\t%s\n",
473 eld_connection_type_names[e->conn_type]);
474 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
475 eld_version_names[e->eld_ver]);
476 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
477 cea_edid_version_names[e->cea_edid_ver]);
478 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
479 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
480 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
481 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
482 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
483 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
484
485 snd_hdac_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
486 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
487
488 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
489
490 for (i = 0; i < e->sad_count; i++)
491 hdmi_print_sad_info(i, e->sad + i, buffer);
492}
493
494void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
495 struct snd_info_buffer *buffer)
496{
497 struct parsed_hdmi_eld *e = &eld->info;
498 char line[64];
499 char name[64];
500 char *sname;
501 long long val;
502 unsigned int n;
503
504 while (!snd_info_get_line(buffer, line, sizeof(line))) {
505 if (sscanf(line, "%s %llx", name, &val) != 2)
506 continue;
507 /*
508 * We don't allow modification to these fields:
509 * monitor_name manufacture_id product_id
510 * eld_version edid_version
511 */
512 if (!strcmp(name, "monitor_present"))
513 eld->monitor_present = val;
514 else if (!strcmp(name, "eld_valid"))
515 eld->eld_valid = val;
516 else if (!strcmp(name, "connection_type"))
517 e->conn_type = val;
518 else if (!strcmp(name, "port_id"))
519 e->port_id = val;
520 else if (!strcmp(name, "support_hdcp"))
521 e->support_hdcp = val;
522 else if (!strcmp(name, "support_ai"))
523 e->support_ai = val;
524 else if (!strcmp(name, "audio_sync_delay"))
525 e->aud_synch_delay = val;
526 else if (!strcmp(name, "speakers"))
527 e->spk_alloc = val;
528 else if (!strcmp(name, "sad_count"))
529 e->sad_count = val;
530 else if (!strncmp(name, "sad", 3)) {
531 sname = name + 4;
532 n = name[3] - '0';
533 if (name[4] >= '0' && name[4] <= '9') {
534 sname++;
535 n = 10 * n + name[4] - '0';
536 }
537 if (n >= ELD_MAX_SAD)
538 continue;
539 if (!strcmp(sname, "_coding_type"))
540 e->sad[n].format = val;
541 else if (!strcmp(sname, "_channels"))
542 e->sad[n].channels = val;
543 else if (!strcmp(sname, "_rates"))
544 e->sad[n].rates = val;
545 else if (!strcmp(sname, "_bits"))
546 e->sad[n].sample_bits = val;
547 else if (!strcmp(sname, "_max_bitrate"))
548 e->sad[n].max_bitrate = val;
549 else if (!strcmp(sname, "_profile"))
550 e->sad[n].profile = val;
551 if (n >= e->sad_count)
552 e->sad_count = n + 1;
553 }
554 }
555}
556#endif /* CONFIG_SND_PROC_FS */
557
558/* update PCM info based on ELD */
559void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
560 struct hda_pcm_stream *hinfo)
561{
562 u32 rates;
563 u64 formats;
564 unsigned int maxbps;
565 unsigned int channels_max;
566 int i;
567
568 /* assume basic audio support (the basic audio flag is not in ELD;
569 * however, all audio capable sinks are required to support basic
570 * audio) */
571 rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
572 SNDRV_PCM_RATE_48000;
573 formats = SNDRV_PCM_FMTBIT_S16_LE;
574 maxbps = 16;
575 channels_max = 2;
576 for (i = 0; i < e->sad_count; i++) {
577 struct cea_sad *a = &e->sad[i];
578 rates |= a->rates;
579 if (a->channels > channels_max)
580 channels_max = a->channels;
581 if (a->format == AUDIO_CODING_TYPE_LPCM) {
582 if (a->sample_bits & AC_SUPPCM_BITS_20) {
583 formats |= SNDRV_PCM_FMTBIT_S32_LE;
584 if (maxbps < 20)
585 maxbps = 20;
586 }
587 if (a->sample_bits & AC_SUPPCM_BITS_24) {
588 formats |= SNDRV_PCM_FMTBIT_S32_LE;
589 if (maxbps < 24)
590 maxbps = 24;
591 }
592 }
593 }
594
595 /* restrict the parameters by the values the codec provides */
596 hinfo->rates &= rates;
597 hinfo->formats &= formats;
598 hinfo->maxbps = min(hinfo->maxbps, maxbps);
599 hinfo->channels_max = min(hinfo->channels_max, channels_max);
600}
601
602
603/* ATI/AMD specific stuff (ELD emulation) */
604
605#define ATI_VERB_SET_AUDIO_DESCRIPTOR 0x776
606#define ATI_VERB_SET_SINK_INFO_INDEX 0x780
607#define ATI_VERB_GET_SPEAKER_ALLOCATION 0xf70
608#define ATI_VERB_GET_AUDIO_DESCRIPTOR 0xf76
609#define ATI_VERB_GET_AUDIO_VIDEO_DELAY 0xf7b
610#define ATI_VERB_GET_SINK_INFO_INDEX 0xf80
611#define ATI_VERB_GET_SINK_INFO_DATA 0xf81
612
613#define ATI_SPKALLOC_SPKALLOC 0x007f
614#define ATI_SPKALLOC_TYPE_HDMI 0x0100
615#define ATI_SPKALLOC_TYPE_DISPLAYPORT 0x0200
616
617/* first three bytes are just standard SAD */
618#define ATI_AUDIODESC_CHANNELS 0x00000007
619#define ATI_AUDIODESC_RATES 0x0000ff00
620#define ATI_AUDIODESC_LPCM_STEREO_RATES 0xff000000
621
622/* in standard HDMI VSDB format */
623#define ATI_DELAY_VIDEO_LATENCY 0x000000ff
624#define ATI_DELAY_AUDIO_LATENCY 0x0000ff00
625
626enum ati_sink_info_idx {
627 ATI_INFO_IDX_MANUFACTURER_ID = 0,
628 ATI_INFO_IDX_PRODUCT_ID = 1,
629 ATI_INFO_IDX_SINK_DESC_LEN = 2,
630 ATI_INFO_IDX_PORT_ID_LOW = 3,
631 ATI_INFO_IDX_PORT_ID_HIGH = 4,
632 ATI_INFO_IDX_SINK_DESC_FIRST = 5,
633 ATI_INFO_IDX_SINK_DESC_LAST = 22, /* max len 18 bytes */
634};
635
636int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid,
637 unsigned char *buf, int *eld_size, bool rev3_or_later)
638{
639 int spkalloc, ati_sad, aud_synch;
640 int sink_desc_len = 0;
641 int pos, i;
642
643 /* ATI/AMD does not have ELD, emulate it */
644
645 spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0);
646
647 if (spkalloc <= 0) {
648 codec_info(codec, "HDMI ATI/AMD: no speaker allocation for ELD\n");
649 return -EINVAL;
650 }
651
652 memset(buf, 0, ELD_FIXED_BYTES + ELD_MAX_MNL + ELD_MAX_SAD * 3);
653
654 /* version */
655 buf[0] = ELD_VER_CEA_861D << 3;
656
657 /* speaker allocation from EDID */
658 buf[7] = spkalloc & ATI_SPKALLOC_SPKALLOC;
659
660 /* is DisplayPort? */
661 if (spkalloc & ATI_SPKALLOC_TYPE_DISPLAYPORT)
662 buf[5] |= 0x04;
663
664 pos = ELD_FIXED_BYTES;
665
666 if (rev3_or_later) {
667 int sink_info;
668
669 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_LOW);
670 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
671 put_unaligned_le32(sink_info, buf + 8);
672
673 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_HIGH);
674 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
675 put_unaligned_le32(sink_info, buf + 12);
676
677 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_MANUFACTURER_ID);
678 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
679 put_unaligned_le16(sink_info, buf + 16);
680
681 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PRODUCT_ID);
682 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
683 put_unaligned_le16(sink_info, buf + 18);
684
685 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_LEN);
686 sink_desc_len = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
687
688 if (sink_desc_len > ELD_MAX_MNL) {
689 codec_info(codec, "HDMI ATI/AMD: Truncating HDMI sink description with length %d\n",
690 sink_desc_len);
691 sink_desc_len = ELD_MAX_MNL;
692 }
693
694 buf[4] |= sink_desc_len;
695
696 for (i = 0; i < sink_desc_len; i++) {
697 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_FIRST + i);
698 buf[pos++] = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
699 }
700 }
701
702 for (i = AUDIO_CODING_TYPE_LPCM; i <= AUDIO_CODING_TYPE_WMAPRO; i++) {
703 if (i == AUDIO_CODING_TYPE_SACD || i == AUDIO_CODING_TYPE_DST)
704 continue; /* not handled by ATI/AMD */
705
706 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3);
707 ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0);
708
709 if (ati_sad <= 0)
710 continue;
711
712 if (ati_sad & ATI_AUDIODESC_RATES) {
713 /* format is supported, copy SAD as-is */
714 buf[pos++] = (ati_sad & 0x0000ff) >> 0;
715 buf[pos++] = (ati_sad & 0x00ff00) >> 8;
716 buf[pos++] = (ati_sad & 0xff0000) >> 16;
717 }
718
719 if (i == AUDIO_CODING_TYPE_LPCM
720 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES)
721 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) >> 16 != (ati_sad & ATI_AUDIODESC_RATES)) {
722 /* for PCM there is a separate stereo rate mask */
723 buf[pos++] = ((ati_sad & 0x000000ff) & ~ATI_AUDIODESC_CHANNELS) | 0x1;
724 /* rates from the extra byte */
725 buf[pos++] = (ati_sad & 0xff000000) >> 24;
726 buf[pos++] = (ati_sad & 0x00ff0000) >> 16;
727 }
728 }
729
730 if (pos == ELD_FIXED_BYTES + sink_desc_len) {
731 codec_info(codec, "HDMI ATI/AMD: no audio descriptors for ELD\n");
732 return -EINVAL;
733 }
734
735 /*
736 * HDMI VSDB latency format:
737 * separately for both audio and video:
738 * 0 field not valid or unknown latency
739 * [1..251] msecs = (x-1)*2 (max 500ms with x = 251 = 0xfb)
740 * 255 audio/video not supported
741 *
742 * HDA latency format:
743 * single value indicating video latency relative to audio:
744 * 0 unknown or 0ms
745 * [1..250] msecs = x*2 (max 500ms with x = 250 = 0xfa)
746 * [251..255] reserved
747 */
748 aud_synch = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_VIDEO_DELAY, 0);
749 if ((aud_synch & ATI_DELAY_VIDEO_LATENCY) && (aud_synch & ATI_DELAY_AUDIO_LATENCY)) {
750 int video_latency_hdmi = (aud_synch & ATI_DELAY_VIDEO_LATENCY);
751 int audio_latency_hdmi = (aud_synch & ATI_DELAY_AUDIO_LATENCY) >> 8;
752
753 if (video_latency_hdmi <= 0xfb && audio_latency_hdmi <= 0xfb &&
754 video_latency_hdmi > audio_latency_hdmi)
755 buf[6] = video_latency_hdmi - audio_latency_hdmi;
756 /* else unknown/invalid or 0ms or video ahead of audio, so use zero */
757 }
758
759 /* SAD count */
760 buf[5] |= ((pos - ELD_FIXED_BYTES - sink_desc_len) / 3) << 4;
761
762 /* Baseline ELD block length is 4-byte aligned */
763 pos = round_up(pos, 4);
764
765 /* Baseline ELD length (4-byte header is not counted in) */
766 buf[2] = (pos - 4) / 4;
767
768 *eld_size = pos;
769
770 return 0;
771}