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block: fix module reference leak on put_disk() call for cgroups throttle
[linux/fpc-iii.git] / sound / pci / hda / hda_eld.c
blob563984dd25622008e5bf377ba10cc99c25f72635
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
32 enum eld_versions {
33 ELD_VER_CEA_861D = 2,
34 ELD_VER_PARTIAL = 31,
35 };
36
37 enum 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
45 static const char * const 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
59 static const char * const eld_connection_type_names[4] = {
60 "HDMI",
61 "DisplayPort",
62 "2-reserved",
63 "3-reserved"
64 };
65
66 enum 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
89 enum 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
97 static const char * const 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 */
127 static 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 */
137 static 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
148 static 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
170 static void hdmi_update_short_audio_desc(struct hda_codec *codec,
171 struct cea_sad *a,
172 const unsigned char *buf)
173 {
174 int i;
175 int val;
176
177 val = GRAB_BITS(buf, 1, 0, 7);
178 a->rates = 0;
179 for (i = 0; i < 7; i++)
180 if (val & (1 << i))
181 a->rates |= cea_sampling_frequencies[i + 1];
182
183 a->channels = GRAB_BITS(buf, 0, 0, 3);
184 a->channels++;
185
186 a->sample_bits = 0;
187 a->max_bitrate = 0;
188
189 a->format = GRAB_BITS(buf, 0, 3, 4);
190 switch (a->format) {
191 case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
192 codec_info(codec, "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 codec_info(codec,
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 */
250 int snd_hdmi_parse_eld(struct hda_codec *codec, 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 codec_info(codec, "HDMI: Unknown ELD version %d\n", e->eld_ver);
260 goto out_fail;
261 }
262
263 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
264 mnl = GRAB_BITS(buf, 4, 0, 5);
265 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
266
267 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
268 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
269 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
270 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
271
272 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
273 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
274
275 e->port_id = get_unaligned_le64(buf + 8);
276
277 /* not specified, but the spec's tendency is little endian */
278 e->manufacture_id = get_unaligned_le16(buf + 16);
279 e->product_id = get_unaligned_le16(buf + 18);
280
281 if (mnl > ELD_MAX_MNL) {
282 codec_info(codec, "HDMI: MNL is reserved value %d\n", mnl);
283 goto out_fail;
284 } else if (ELD_FIXED_BYTES + mnl > size) {
285 codec_info(codec, "HDMI: out of range MNL %d\n", mnl);
286 goto out_fail;
287 } else
288 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl + 1);
289
290 for (i = 0; i < e->sad_count; i++) {
291 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
292 codec_info(codec, "HDMI: out of range SAD %d\n", i);
293 goto out_fail;
294 }
295 hdmi_update_short_audio_desc(codec, e->sad + i,
296 buf + ELD_FIXED_BYTES + mnl + 3 * i);
297 }
298
299 /*
300 * HDMI sink's ELD info cannot always be retrieved for now, e.g.
301 * in console or for audio devices. Assume the highest speakers
302 * configuration, to _not_ prohibit multi-channel audio playback.
303 */
304 if (!e->spk_alloc)
305 e->spk_alloc = 0xffff;
306
307 return 0;
308
309 out_fail:
310 return -EINVAL;
311 }
312
313 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
314 {
315 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
316 AC_DIPSIZE_ELD_BUF);
317 }
318
319 int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,
320 unsigned char *buf, int *eld_size)
321 {
322 int i;
323 int ret = 0;
324 int size;
325
326 /*
327 * ELD size is initialized to zero in caller function. If no errors and
328 * ELD is valid, actual eld_size is assigned.
329 */
330
331 size = snd_hdmi_get_eld_size(codec, nid);
332 if (size == 0) {
333 /* wfg: workaround for ASUS P5E-VM HDMI board */
334 codec_info(codec, "HDMI: ELD buf size is 0, force 128\n");
335 size = 128;
336 }
337 if (size < ELD_FIXED_BYTES || size > ELD_MAX_SIZE) {
338 codec_info(codec, "HDMI: invalid ELD buf size %d\n", size);
339 return -ERANGE;
340 }
341
342 /* set ELD buffer */
343 for (i = 0; i < size; i++) {
344 unsigned int val = hdmi_get_eld_data(codec, nid, i);
345 /*
346 * Graphics driver might be writing to ELD buffer right now.
347 * Just abort. The caller will repoll after a while.
348 */
349 if (!(val & AC_ELDD_ELD_VALID)) {
350 codec_info(codec, "HDMI: invalid ELD data byte %d\n", i);
351 ret = -EINVAL;
352 goto error;
353 }
354 val &= AC_ELDD_ELD_DATA;
355 /*
356 * The first byte cannot be zero. This can happen on some DVI
357 * connections. Some Intel chips may also need some 250ms delay
358 * to return non-zero ELD data, even when the graphics driver
359 * correctly writes ELD content before setting ELD_valid bit.
360 */
361 if (!val && !i) {
362 codec_dbg(codec, "HDMI: 0 ELD data\n");
363 ret = -EINVAL;
364 goto error;
365 }
366 buf[i] = val;
367 }
368
369 *eld_size = size;
370 error:
371 return ret;
372 }
373
374 /*
375 * SNDRV_PCM_RATE_* and AC_PAR_PCM values don't match, print correct rates with
376 * hdmi-specific routine.
377 */
378 static void hdmi_print_pcm_rates(int pcm, char *buf, int buflen)
379 {
380 static unsigned int alsa_rates[] = {
381 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
382 88200, 96000, 176400, 192000, 384000
383 };
384 int i, j;
385
386 for (i = 0, j = 0; i < ARRAY_SIZE(alsa_rates); i++)
387 if (pcm & (1 << i))
388 j += snprintf(buf + j, buflen - j, " %d",
389 alsa_rates[i]);
390
391 buf[j] = '\0'; /* necessary when j == 0 */
392 }
393
394 #define SND_PRINT_RATES_ADVISED_BUFSIZE 80
395
396 static void hdmi_show_short_audio_desc(struct hda_codec *codec,
397 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 codec_dbg(codec,
416 "HDMI: supports coding type %s: channels = %d, rates =%s%s\n",
417 cea_audio_coding_type_names[a->format],
418 a->channels, buf, buf2);
419 }
420
421 void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
422 {
423 int i, j;
424
425 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
426 if (spk_alloc & (1 << i))
427 j += snprintf(buf + j, buflen - j, " %s",
428 cea_speaker_allocation_names[i]);
429 }
430 buf[j] = '\0'; /* necessary when j == 0 */
431 }
432
433 void snd_hdmi_show_eld(struct hda_codec *codec, struct parsed_hdmi_eld *e)
434 {
435 int i;
436
437 codec_dbg(codec, "HDMI: detected monitor %s at connection type %s\n",
438 e->monitor_name,
439 eld_connection_type_names[e->conn_type]);
440
441 if (e->spk_alloc) {
442 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
443 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
444 codec_dbg(codec, "HDMI: available speakers:%s\n", buf);
445 }
446
447 for (i = 0; i < e->sad_count; i++)
448 hdmi_show_short_audio_desc(codec, e->sad + i);
449 }
450
451 #ifdef CONFIG_SND_PROC_FS
452
453 static void hdmi_print_sad_info(int i, struct cea_sad *a,
454 struct snd_info_buffer *buffer)
455 {
456 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
457
458 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
459 i, a->format, cea_audio_coding_type_names[a->format]);
460 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
461
462 hdmi_print_pcm_rates(a->rates, buf, sizeof(buf));
463 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
464
465 if (a->format == AUDIO_CODING_TYPE_LPCM) {
466 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
467 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
468 i, a->sample_bits, buf);
469 }
470
471 if (a->max_bitrate)
472 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
473 i, a->max_bitrate);
474
475 if (a->profile)
476 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
477 }
478
479 void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
480 struct snd_info_buffer *buffer)
481 {
482 struct parsed_hdmi_eld *e = &eld->info;
483 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
484 int i;
485 static const char * const eld_version_names[32] = {
486 "reserved",
487 "reserved",
488 "CEA-861D or below",
489 [3 ... 30] = "reserved",
490 [31] = "partial"
491 };
492 static const char * const cea_edid_version_names[8] = {
493 "no CEA EDID Timing Extension block present",
494 "CEA-861",
495 "CEA-861-A",
496 "CEA-861-B, C or D",
497 [4 ... 7] = "reserved"
498 };
499
500 snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
501 snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
502 if (!eld->eld_valid)
503 return;
504 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
505 snd_iprintf(buffer, "connection_type\t\t%s\n",
506 eld_connection_type_names[e->conn_type]);
507 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
508 eld_version_names[e->eld_ver]);
509 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
510 cea_edid_version_names[e->cea_edid_ver]);
511 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
512 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
513 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
514 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
515 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
516 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
517
518 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
519 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
520
521 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
522
523 for (i = 0; i < e->sad_count; i++)
524 hdmi_print_sad_info(i, e->sad + i, buffer);
525 }
526
527 void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
528 struct snd_info_buffer *buffer)
529 {
530 struct parsed_hdmi_eld *e = &eld->info;
531 char line[64];
532 char name[64];
533 char *sname;
534 long long val;
535 unsigned int n;
536
537 while (!snd_info_get_line(buffer, line, sizeof(line))) {
538 if (sscanf(line, "%s %llx", name, &val) != 2)
539 continue;
540 /*
541 * We don't allow modification to these fields:
542 * monitor_name manufacture_id product_id
543 * eld_version edid_version
544 */
545 if (!strcmp(name, "monitor_present"))
546 eld->monitor_present = val;
547 else if (!strcmp(name, "eld_valid"))
548 eld->eld_valid = val;
549 else if (!strcmp(name, "connection_type"))
550 e->conn_type = val;
551 else if (!strcmp(name, "port_id"))
552 e->port_id = val;
553 else if (!strcmp(name, "support_hdcp"))
554 e->support_hdcp = val;
555 else if (!strcmp(name, "support_ai"))
556 e->support_ai = val;
557 else if (!strcmp(name, "audio_sync_delay"))
558 e->aud_synch_delay = val;
559 else if (!strcmp(name, "speakers"))
560 e->spk_alloc = val;
561 else if (!strcmp(name, "sad_count"))
562 e->sad_count = val;
563 else if (!strncmp(name, "sad", 3)) {
564 sname = name + 4;
565 n = name[3] - '0';
566 if (name[4] >= '0' && name[4] <= '9') {
567 sname++;
568 n = 10 * n + name[4] - '0';
569 }
570 if (n >= ELD_MAX_SAD)
571 continue;
572 if (!strcmp(sname, "_coding_type"))
573 e->sad[n].format = val;
574 else if (!strcmp(sname, "_channels"))
575 e->sad[n].channels = val;
576 else if (!strcmp(sname, "_rates"))
577 e->sad[n].rates = val;
578 else if (!strcmp(sname, "_bits"))
579 e->sad[n].sample_bits = val;
580 else if (!strcmp(sname, "_max_bitrate"))
581 e->sad[n].max_bitrate = val;
582 else if (!strcmp(sname, "_profile"))
583 e->sad[n].profile = val;
584 if (n >= e->sad_count)
585 e->sad_count = n + 1;
586 }
587 }
588 }
589 #endif /* CONFIG_SND_PROC_FS */
590
591 /* update PCM info based on ELD */
592 void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
593 struct hda_pcm_stream *hinfo)
594 {
595 u32 rates;
596 u64 formats;
597 unsigned int maxbps;
598 unsigned int channels_max;
599 int i;
600
601 /* assume basic audio support (the basic audio flag is not in ELD;
602 * however, all audio capable sinks are required to support basic
603 * audio) */
604 rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
605 SNDRV_PCM_RATE_48000;
606 formats = SNDRV_PCM_FMTBIT_S16_LE;
607 maxbps = 16;
608 channels_max = 2;
609 for (i = 0; i < e->sad_count; i++) {
610 struct cea_sad *a = &e->sad[i];
611 rates |= a->rates;
612 if (a->channels > channels_max)
613 channels_max = a->channels;
614 if (a->format == AUDIO_CODING_TYPE_LPCM) {
615 if (a->sample_bits & AC_SUPPCM_BITS_20) {
616 formats |= SNDRV_PCM_FMTBIT_S32_LE;
617 if (maxbps < 20)
618 maxbps = 20;
619 }
620 if (a->sample_bits & AC_SUPPCM_BITS_24) {
621 formats |= SNDRV_PCM_FMTBIT_S32_LE;
622 if (maxbps < 24)
623 maxbps = 24;
624 }
625 }
626 }
627
628 /* restrict the parameters by the values the codec provides */
629 hinfo->rates &= rates;
630 hinfo->formats &= formats;
631 hinfo->maxbps = min(hinfo->maxbps, maxbps);
632 hinfo->channels_max = min(hinfo->channels_max, channels_max);
633 }
634
635
636 /* ATI/AMD specific stuff (ELD emulation) */
637
638 #define ATI_VERB_SET_AUDIO_DESCRIPTOR 0x776
639 #define ATI_VERB_SET_SINK_INFO_INDEX 0x780
640 #define ATI_VERB_GET_SPEAKER_ALLOCATION 0xf70
641 #define ATI_VERB_GET_AUDIO_DESCRIPTOR 0xf76
642 #define ATI_VERB_GET_AUDIO_VIDEO_DELAY 0xf7b
643 #define ATI_VERB_GET_SINK_INFO_INDEX 0xf80
644 #define ATI_VERB_GET_SINK_INFO_DATA 0xf81
645
646 #define ATI_SPKALLOC_SPKALLOC 0x007f
647 #define ATI_SPKALLOC_TYPE_HDMI 0x0100
648 #define ATI_SPKALLOC_TYPE_DISPLAYPORT 0x0200
649
650 /* first three bytes are just standard SAD */
651 #define ATI_AUDIODESC_CHANNELS 0x00000007
652 #define ATI_AUDIODESC_RATES 0x0000ff00
653 #define ATI_AUDIODESC_LPCM_STEREO_RATES 0xff000000
654
655 /* in standard HDMI VSDB format */
656 #define ATI_DELAY_VIDEO_LATENCY 0x000000ff
657 #define ATI_DELAY_AUDIO_LATENCY 0x0000ff00
658
659 enum ati_sink_info_idx {
660 ATI_INFO_IDX_MANUFACTURER_ID = 0,
661 ATI_INFO_IDX_PRODUCT_ID = 1,
662 ATI_INFO_IDX_SINK_DESC_LEN = 2,
663 ATI_INFO_IDX_PORT_ID_LOW = 3,
664 ATI_INFO_IDX_PORT_ID_HIGH = 4,
665 ATI_INFO_IDX_SINK_DESC_FIRST = 5,
666 ATI_INFO_IDX_SINK_DESC_LAST = 22, /* max len 18 bytes */
667 };
668
669 int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid,
670 unsigned char *buf, int *eld_size, bool rev3_or_later)
671 {
672 int spkalloc, ati_sad, aud_synch;
673 int sink_desc_len = 0;
674 int pos, i;
675
676 /* ATI/AMD does not have ELD, emulate it */
677
678 spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0);
679
680 if (spkalloc <= 0) {
681 codec_info(codec, "HDMI ATI/AMD: no speaker allocation for ELD\n");
682 return -EINVAL;
683 }
684
685 memset(buf, 0, ELD_FIXED_BYTES + ELD_MAX_MNL + ELD_MAX_SAD * 3);
686
687 /* version */
688 buf[0] = ELD_VER_CEA_861D << 3;
689
690 /* speaker allocation from EDID */
691 buf[7] = spkalloc & ATI_SPKALLOC_SPKALLOC;
692
693 /* is DisplayPort? */
694 if (spkalloc & ATI_SPKALLOC_TYPE_DISPLAYPORT)
695 buf[5] |= 0x04;
696
697 pos = ELD_FIXED_BYTES;
698
699 if (rev3_or_later) {
700 int sink_info;
701
702 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_LOW);
703 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
704 put_unaligned_le32(sink_info, buf + 8);
705
706 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_HIGH);
707 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
708 put_unaligned_le32(sink_info, buf + 12);
709
710 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_MANUFACTURER_ID);
711 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
712 put_unaligned_le16(sink_info, buf + 16);
713
714 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PRODUCT_ID);
715 sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
716 put_unaligned_le16(sink_info, buf + 18);
717
718 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_LEN);
719 sink_desc_len = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
720
721 if (sink_desc_len > ELD_MAX_MNL) {
722 codec_info(codec, "HDMI ATI/AMD: Truncating HDMI sink description with length %d\n",
723 sink_desc_len);
724 sink_desc_len = ELD_MAX_MNL;
725 }
726
727 buf[4] |= sink_desc_len;
728
729 for (i = 0; i < sink_desc_len; i++) {
730 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_FIRST + i);
731 buf[pos++] = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
732 }
733 }
734
735 for (i = AUDIO_CODING_TYPE_LPCM; i <= AUDIO_CODING_TYPE_WMAPRO; i++) {
736 if (i == AUDIO_CODING_TYPE_SACD || i == AUDIO_CODING_TYPE_DST)
737 continue; /* not handled by ATI/AMD */
738
739 snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3);
740 ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0);
741
742 if (ati_sad <= 0)
743 continue;
744
745 if (ati_sad & ATI_AUDIODESC_RATES) {
746 /* format is supported, copy SAD as-is */
747 buf[pos++] = (ati_sad & 0x0000ff) >> 0;
748 buf[pos++] = (ati_sad & 0x00ff00) >> 8;
749 buf[pos++] = (ati_sad & 0xff0000) >> 16;
750 }
751
752 if (i == AUDIO_CODING_TYPE_LPCM
753 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES)
754 && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) >> 16 != (ati_sad & ATI_AUDIODESC_RATES)) {
755 /* for PCM there is a separate stereo rate mask */
756 buf[pos++] = ((ati_sad & 0x000000ff) & ~ATI_AUDIODESC_CHANNELS) | 0x1;
757 /* rates from the extra byte */
758 buf[pos++] = (ati_sad & 0xff000000) >> 24;
759 buf[pos++] = (ati_sad & 0x00ff0000) >> 16;
760 }
761 }
762
763 if (pos == ELD_FIXED_BYTES + sink_desc_len) {
764 codec_info(codec, "HDMI ATI/AMD: no audio descriptors for ELD\n");
765 return -EINVAL;
766 }
767
768 /*
769 * HDMI VSDB latency format:
770 * separately for both audio and video:
771 * 0 field not valid or unknown latency
772 * [1..251] msecs = (x-1)*2 (max 500ms with x = 251 = 0xfb)
773 * 255 audio/video not supported
774 *
775 * HDA latency format:
776 * single value indicating video latency relative to audio:
777 * 0 unknown or 0ms
778 * [1..250] msecs = x*2 (max 500ms with x = 250 = 0xfa)
779 * [251..255] reserved
780 */
781 aud_synch = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_VIDEO_DELAY, 0);
782 if ((aud_synch & ATI_DELAY_VIDEO_LATENCY) && (aud_synch & ATI_DELAY_AUDIO_LATENCY)) {
783 int video_latency_hdmi = (aud_synch & ATI_DELAY_VIDEO_LATENCY);
784 int audio_latency_hdmi = (aud_synch & ATI_DELAY_AUDIO_LATENCY) >> 8;
785
786 if (video_latency_hdmi <= 0xfb && audio_latency_hdmi <= 0xfb &&
787 video_latency_hdmi > audio_latency_hdmi)
788 buf[6] = video_latency_hdmi - audio_latency_hdmi;
789 /* else unknown/invalid or 0ms or video ahead of audio, so use zero */
790 }
791
792 /* SAD count */
793 buf[5] |= ((pos - ELD_FIXED_BYTES - sink_desc_len) / 3) << 4;
794
795 /* Baseline ELD block length is 4-byte aligned */
796 pos = round_up(pos, 4);
797
798 /* Baseline ELD length (4-byte header is not counted in) */
799 buf[2] = (pos - 4) / 4;
800
801 *eld_size = pos;
802
803 return 0;
804 }
Linux with added FPC-III support