?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ALSA: hda - fix DisplayPort naming
[linux-2.6/mini2440.git] / sound / pci / hda / hda_eld.c
blobaa438562efc7cb13e01d001ec59a797f3d5433b3
1 /*
2 * Generic routines and proc interface for ELD(EDID Like Data) information
3 *
4 * Copyright(c) 2008 Intel Corporation.
5 *
6 * Authors:
7 * Wu Fengguang <wfg@linux.intel.com>
8 *
9 * This driver is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This driver is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include <linux/init.h>
25 #include <sound/core.h>
26 #include <asm/unaligned.h>
27 #include "hda_codec.h"
28 #include "hda_local.h"
29
30 enum eld_versions {
31 ELD_VER_CEA_861D = 2,
32 ELD_VER_PARTIAL = 31,
33 };
34
35 static char *eld_versoin_names[32] = {
36 "reserved",
37 "reserved",
38 "CEA-861D or below",
39 [3 ... 30] = "reserved",
40 [31] = "partial"
41 };
42
43 enum cea_edid_versions {
44 CEA_EDID_VER_NONE = 0,
45 CEA_EDID_VER_CEA861 = 1,
46 CEA_EDID_VER_CEA861A = 2,
47 CEA_EDID_VER_CEA861BCD = 3,
48 CEA_EDID_VER_RESERVED = 4,
49 };
50
51 static char *cea_edid_version_names[8] = {
52 "no CEA EDID Timing Extension block present",
53 "CEA-861",
54 "CEA-861-A",
55 "CEA-861-B, C or D",
56 [4 ... 7] = "reserved"
57 };
58
59 static char *cea_speaker_allocation_names[] = {
60 /* 0 */ "FL/FR",
61 /* 1 */ "LFE",
62 /* 2 */ "FC",
63 /* 3 */ "RL/RR",
64 /* 4 */ "RC",
65 /* 5 */ "FLC/FRC",
66 /* 6 */ "RLC/RRC",
67 /* 7 */ "FLW/FRW",
68 /* 8 */ "FLH/FRH",
69 /* 9 */ "TC",
70 /* 10 */ "FCH",
71 };
72
73 static char *eld_connection_type_names[4] = {
74 "HDMI",
75 "DisplayPort",
76 "2-reserved",
77 "3-reserved"
78 };
79
80 enum cea_audio_coding_types {
81 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
82 AUDIO_CODING_TYPE_LPCM = 1,
83 AUDIO_CODING_TYPE_AC3 = 2,
84 AUDIO_CODING_TYPE_MPEG1 = 3,
85 AUDIO_CODING_TYPE_MP3 = 4,
86 AUDIO_CODING_TYPE_MPEG2 = 5,
87 AUDIO_CODING_TYPE_AACLC = 6,
88 AUDIO_CODING_TYPE_DTS = 7,
89 AUDIO_CODING_TYPE_ATRAC = 8,
90 AUDIO_CODING_TYPE_SACD = 9,
91 AUDIO_CODING_TYPE_EAC3 = 10,
92 AUDIO_CODING_TYPE_DTS_HD = 11,
93 AUDIO_CODING_TYPE_MLP = 12,
94 AUDIO_CODING_TYPE_DST = 13,
95 AUDIO_CODING_TYPE_WMAPRO = 14,
96 AUDIO_CODING_TYPE_REF_CXT = 15,
97 /* also include valid xtypes below */
98 AUDIO_CODING_TYPE_HE_AAC = 15,
99 AUDIO_CODING_TYPE_HE_AAC2 = 16,
100 AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
101 };
102
103 enum cea_audio_coding_xtypes {
104 AUDIO_CODING_XTYPE_HE_REF_CT = 0,
105 AUDIO_CODING_XTYPE_HE_AAC = 1,
106 AUDIO_CODING_XTYPE_HE_AAC2 = 2,
107 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
108 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
109 };
110
111 static char *cea_audio_coding_type_names[] = {
112 /* 0 */ "undefined",
113 /* 1 */ "LPCM",
114 /* 2 */ "AC-3",
115 /* 3 */ "MPEG1",
116 /* 4 */ "MP3",
117 /* 5 */ "MPEG2",
118 /* 6 */ "AAC-LC",
119 /* 7 */ "DTS",
120 /* 8 */ "ATRAC",
121 /* 9 */ "DSD (One Bit Audio)",
122 /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
123 /* 11 */ "DTS-HD",
124 /* 12 */ "MLP (Dolby TrueHD)",
125 /* 13 */ "DST",
126 /* 14 */ "WMAPro",
127 /* 15 */ "HE-AAC",
128 /* 16 */ "HE-AACv2",
129 /* 17 */ "MPEG Surround",
130 };
131
132 /*
133 * The following two lists are shared between
134 * - HDMI audio InfoFrame (source to sink)
135 * - CEA E-EDID Extension (sink to source)
136 */
137
138 /*
139 * SS1:SS0 index => sample size
140 */
141 static int cea_sample_sizes[4] = {
142 0, /* 0: Refer to Stream Header */
143 AC_SUPPCM_BITS_16, /* 1: 16 bits */
144 AC_SUPPCM_BITS_20, /* 2: 20 bits */
145 AC_SUPPCM_BITS_24, /* 3: 24 bits */
146 };
147
148 /*
149 * SF2:SF1:SF0 index => sampling frequency
150 */
151 static int cea_sampling_frequencies[8] = {
152 0, /* 0: Refer to Stream Header */
153 SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
154 SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
155 SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
156 SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
157 SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
158 SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
159 SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
160 };
161
162 static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid,
163 int byte_index)
164 {
165 unsigned int val;
166
167 val = snd_hda_codec_read(codec, nid, 0,
168 AC_VERB_GET_HDMI_ELDD, byte_index);
169
170 #ifdef BE_PARANOID
171 printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
172 #endif
173
174 if ((val & AC_ELDD_ELD_VALID) == 0) {
175 snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n",
176 byte_index);
177 val = 0;
178 }
179
180 return val & AC_ELDD_ELD_DATA;
181 }
182
183 #define GRAB_BITS(buf, byte, lowbit, bits) \
184 ({ \
185 BUILD_BUG_ON(lowbit > 7); \
186 BUILD_BUG_ON(bits > 8); \
187 BUILD_BUG_ON(bits <= 0); \
188 \
189 (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
190 })
191
192 static void hdmi_update_short_audio_desc(struct cea_sad *a,
193 const unsigned char *buf)
194 {
195 int i;
196 int val;
197
198 val = GRAB_BITS(buf, 1, 0, 7);
199 a->rates = 0;
200 for (i = 0; i < 7; i++)
201 if (val & (1 << i))
202 a->rates |= cea_sampling_frequencies[i + 1];
203
204 a->channels = GRAB_BITS(buf, 0, 0, 3);
205 a->channels++;
206
207 a->format = GRAB_BITS(buf, 0, 3, 4);
208 switch (a->format) {
209 case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
210 snd_printd(KERN_INFO
211 "HDMI: audio coding type 0 not expected\n");
212 break;
213
214 case AUDIO_CODING_TYPE_LPCM:
215 val = GRAB_BITS(buf, 2, 0, 3);
216 a->sample_bits = 0;
217 for (i = 0; i < 3; i++)
218 if (val & (1 << i))
219 a->sample_bits |= cea_sample_sizes[i + 1];
220 break;
221
222 case AUDIO_CODING_TYPE_AC3:
223 case AUDIO_CODING_TYPE_MPEG1:
224 case AUDIO_CODING_TYPE_MP3:
225 case AUDIO_CODING_TYPE_MPEG2:
226 case AUDIO_CODING_TYPE_AACLC:
227 case AUDIO_CODING_TYPE_DTS:
228 case AUDIO_CODING_TYPE_ATRAC:
229 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
230 a->max_bitrate *= 8000;
231 break;
232
233 case AUDIO_CODING_TYPE_SACD:
234 break;
235
236 case AUDIO_CODING_TYPE_EAC3:
237 break;
238
239 case AUDIO_CODING_TYPE_DTS_HD:
240 break;
241
242 case AUDIO_CODING_TYPE_MLP:
243 break;
244
245 case AUDIO_CODING_TYPE_DST:
246 break;
247
248 case AUDIO_CODING_TYPE_WMAPRO:
249 a->profile = GRAB_BITS(buf, 2, 0, 3);
250 break;
251
252 case AUDIO_CODING_TYPE_REF_CXT:
253 a->format = GRAB_BITS(buf, 2, 3, 5);
254 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT ||
255 a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
256 snd_printd(KERN_INFO
257 "HDMI: audio coding xtype %d not expected\n",
258 a->format);
259 a->format = 0;
260 } else
261 a->format += AUDIO_CODING_TYPE_HE_AAC -
262 AUDIO_CODING_XTYPE_HE_AAC;
263 break;
264 }
265 }
266
267 /*
268 * Be careful, ELD buf could be totally rubbish!
269 */
270 static int hdmi_update_eld(struct hdmi_eld *e,
271 const unsigned char *buf, int size)
272 {
273 int mnl;
274 int i;
275
276 e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
277 if (e->eld_ver != ELD_VER_CEA_861D &&
278 e->eld_ver != ELD_VER_PARTIAL) {
279 snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
280 e->eld_ver);
281 goto out_fail;
282 }
283
284 e->eld_size = size;
285 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
286 mnl = GRAB_BITS(buf, 4, 0, 5);
287 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
288
289 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
290 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
291 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
292 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
293
294 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
295 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
296
297 e->port_id = get_unaligned_le64(buf + 8);
298
299 /* not specified, but the spec's tendency is little endian */
300 e->manufacture_id = get_unaligned_le16(buf + 16);
301 e->product_id = get_unaligned_le16(buf + 18);
302
303 if (mnl > ELD_MAX_MNL) {
304 snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
305 goto out_fail;
306 } else if (ELD_FIXED_BYTES + mnl > size) {
307 snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
308 goto out_fail;
309 } else
310 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl);
311
312 for (i = 0; i < e->sad_count; i++) {
313 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
314 snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
315 goto out_fail;
316 }
317 hdmi_update_short_audio_desc(e->sad + i,
318 buf + ELD_FIXED_BYTES + mnl + 3 * i);
319 }
320
321 return 0;
322
323 out_fail:
324 e->eld_ver = 0;
325 return -EINVAL;
326 }
327
328 static int hdmi_present_sense(struct hda_codec *codec, hda_nid_t nid)
329 {
330 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_PIN_SENSE, 0);
331 }
332
333 static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid)
334 {
335 int eldv;
336 int present;
337
338 present = hdmi_present_sense(codec, nid);
339 eldv = (present & AC_PINSENSE_ELDV);
340 present = (present & AC_PINSENSE_PRESENCE);
341
342 #ifdef CONFIG_SND_DEBUG_VERBOSE
343 printk(KERN_INFO "HDMI: sink_present = %d, eld_valid = %d\n",
344 !!present, !!eldv);
345 #endif
346
347 return eldv && present;
348 }
349
350 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
351 {
352 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
353 AC_DIPSIZE_ELD_BUF);
354 }
355
356 int snd_hdmi_get_eld(struct hdmi_eld *eld,
357 struct hda_codec *codec, hda_nid_t nid)
358 {
359 int i;
360 int ret;
361 int size;
362 unsigned char *buf;
363
364 if (!hdmi_eld_valid(codec, nid))
365 return -ENOENT;
366
367 size = snd_hdmi_get_eld_size(codec, nid);
368 if (size == 0) {
369 /* wfg: workaround for ASUS P5E-VM HDMI board */
370 snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n");
371 size = 128;
372 }
373 if (size < ELD_FIXED_BYTES || size > PAGE_SIZE) {
374 snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size);
375 return -ERANGE;
376 }
377
378 buf = kmalloc(size, GFP_KERNEL);
379 if (!buf)
380 return -ENOMEM;
381
382 for (i = 0; i < size; i++)
383 buf[i] = hdmi_get_eld_byte(codec, nid, i);
384
385 ret = hdmi_update_eld(eld, buf, size);
386
387 kfree(buf);
388 return ret;
389 }
390
391 static void hdmi_show_short_audio_desc(struct cea_sad *a)
392 {
393 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
394 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
395
396 if (!a->format)
397 return;
398
399 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
400
401 if (a->format == AUDIO_CODING_TYPE_LPCM)
402 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2 - 8));
403 else if (a->max_bitrate)
404 snprintf(buf2, sizeof(buf2),
405 ", max bitrate = %d", a->max_bitrate);
406 else
407 buf2[0] = '\0';
408
409 printk(KERN_INFO "HDMI: supports coding type %s:"
410 " channels = %d, rates =%s%s\n",
411 cea_audio_coding_type_names[a->format],
412 a->channels,
413 buf,
414 buf2);
415 }
416
417 void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
418 {
419 int i, j;
420
421 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
422 if (spk_alloc & (1 << i))
423 j += snprintf(buf + j, buflen - j, " %s",
424 cea_speaker_allocation_names[i]);
425 }
426 buf[j] = '\0'; /* necessary when j == 0 */
427 }
428
429 void snd_hdmi_show_eld(struct hdmi_eld *e)
430 {
431 int i;
432
433 printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n",
434 e->monitor_name,
435 eld_connection_type_names[e->conn_type]);
436
437 if (e->spk_alloc) {
438 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
439 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
440 printk(KERN_INFO "HDMI: available speakers:%s\n", buf);
441 }
442
443 for (i = 0; i < e->sad_count; i++)
444 hdmi_show_short_audio_desc(e->sad + i);
445 }
446
447 #ifdef CONFIG_PROC_FS
448
449 static void hdmi_print_sad_info(int i, struct cea_sad *a,
450 struct snd_info_buffer *buffer)
451 {
452 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
453
454 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
455 i, a->format, cea_audio_coding_type_names[a->format]);
456 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
457
458 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
459 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
460
461 if (a->format == AUDIO_CODING_TYPE_LPCM) {
462 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
463 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
464 i, a->sample_bits, buf);
465 }
466
467 if (a->max_bitrate)
468 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
469 i, a->max_bitrate);
470
471 if (a->profile)
472 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
473 }
474
475 static void hdmi_print_eld_info(struct snd_info_entry *entry,
476 struct snd_info_buffer *buffer)
477 {
478 struct hdmi_eld *e = entry->private_data;
479 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
480 int i;
481
482 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
483 snd_iprintf(buffer, "connection_type\t\t%s\n",
484 eld_connection_type_names[e->conn_type]);
485 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
486 eld_versoin_names[e->eld_ver]);
487 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
488 cea_edid_version_names[e->cea_edid_ver]);
489 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
490 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
491 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
492 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
493 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
494 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
495
496 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
497 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
498
499 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
500
501 for (i = 0; i < e->sad_count; i++)
502 hdmi_print_sad_info(i, e->sad + i, buffer);
503 }
504
505 static void hdmi_write_eld_info(struct snd_info_entry *entry,
506 struct snd_info_buffer *buffer)
507 {
508 struct hdmi_eld *e = entry->private_data;
509 char line[64];
510 char name[64];
511 char *sname;
512 long long val;
513 int n;
514
515 while (!snd_info_get_line(buffer, line, sizeof(line))) {
516 if (sscanf(line, "%s %llx", name, &val) != 2)
517 continue;
518 /*
519 * We don't allow modification to these fields:
520 * monitor_name manufacture_id product_id
521 * eld_version edid_version
522 */
523 if (!strcmp(name, "connection_type"))
524 e->conn_type = val;
525 else if (!strcmp(name, "port_id"))
526 e->port_id = val;
527 else if (!strcmp(name, "support_hdcp"))
528 e->support_hdcp = val;
529 else if (!strcmp(name, "support_ai"))
530 e->support_ai = val;
531 else if (!strcmp(name, "audio_sync_delay"))
532 e->aud_synch_delay = val;
533 else if (!strcmp(name, "speakers"))
534 e->spk_alloc = val;
535 else if (!strcmp(name, "sad_count"))
536 e->sad_count = val;
537 else if (!strncmp(name, "sad", 3)) {
538 sname = name + 4;
539 n = name[3] - '0';
540 if (name[4] >= '0' && name[4] <= '9') {
541 sname++;
542 n = 10 * n + name[4] - '0';
543 }
544 if (n < 0 || n > 31) /* double the CEA limit */
545 continue;
546 if (!strcmp(sname, "_coding_type"))
547 e->sad[n].format = val;
548 else if (!strcmp(sname, "_channels"))
549 e->sad[n].channels = val;
550 else if (!strcmp(sname, "_rates"))
551 e->sad[n].rates = val;
552 else if (!strcmp(sname, "_bits"))
553 e->sad[n].sample_bits = val;
554 else if (!strcmp(sname, "_max_bitrate"))
555 e->sad[n].max_bitrate = val;
556 else if (!strcmp(sname, "_profile"))
557 e->sad[n].profile = val;
558 if (n >= e->sad_count)
559 e->sad_count = n + 1;
560 }
561 }
562 }
563
564
565 int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld)
566 {
567 char name[32];
568 struct snd_info_entry *entry;
569 int err;
570
571 snprintf(name, sizeof(name), "eld#%d", codec->addr);
572 err = snd_card_proc_new(codec->bus->card, name, &entry);
573 if (err < 0)
574 return err;
575
576 snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
577 entry->c.text.write = hdmi_write_eld_info;
578 entry->mode |= S_IWUSR;
579 eld->proc_entry = entry;
580
581 return 0;
582 }
583
584 void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
585 {
586 if (!codec->bus->shutdown && eld->proc_entry) {
587 snd_device_free(codec->bus->card, eld->proc_entry);
588 eld->proc_entry = NULL;
589 }
590 }
591
592 #endif /* CONFIG_PROC_FS */
Support for the Chinese Samsung S3C2440 based development boards