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Merge tag 'perf-urgent-for-mingo-20160418' of git://git.kernel.org/pub/scm/linux...
[deliverable/linux.git] / sound / pci / hda / hda_eld.c
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 "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 }
Linux kernel - Deliverables
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