blob: 9d3e542d74a5ceab71c446ba4d3a232703b61660 [file] [log] [blame]
Wu Fengguang7f4a9f42008-11-18 11:47:52 +08001/*
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
30enum eld_versions {
31 ELD_VER_CEA_861D = 2,
32 ELD_VER_PARTIAL = 31,
33};
34
35static char *eld_versoin_names[32] = {
36 "reserved",
37 "reserved",
38 "CEA-861D or below",
39 [3 ... 30] = "reserved",
40 [31] = "partial"
41};
42
43enum 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
51static 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
59static 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
73static char *eld_connection_type_names[4] = {
74 "HDMI",
75 "Display Port",
76 "2-reserved",
77 "3-reserved"
78};
79
80enum 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
103enum 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
111static 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",
Wu Fengguang06f69d12008-11-19 15:14:01 +0800121 /* 9 */ "DSD (One Bit Audio)",
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800122 /* 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)
Wu Fengguang4e19c582008-11-19 15:13:59 +0800135 * - CEA E-EDID Extension (sink to source)
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800136 */
137
138/*
139 * SS1:SS0 index => sample size
140 */
141static 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 */
151static 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
162static 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 "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 "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
192static 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 "audio coding type 0 not expected in ELD\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 "audio coding xtype %d not expected in ELD\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 */
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800270static int hdmi_update_eld(struct hdmi_eld *e,
271 const unsigned char *buf, int size)
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800272{
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 "Unknown ELD version %d\n", e->eld_ver);
280 goto out_fail;
281 }
282
283 e->eld_size = size;
284 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
285 mnl = GRAB_BITS(buf, 4, 0, 5);
286 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
287
288 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
289 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
290 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
291 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
292
293 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
294 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
295
296 e->port_id = get_unaligned_le64(buf + 8);
297
298 /* not specified, but the spec's tendency is little endian */
299 e->manufacture_id = get_unaligned_le16(buf + 16);
300 e->product_id = get_unaligned_le16(buf + 18);
301
302 if (mnl > ELD_MAX_MNL) {
303 snd_printd(KERN_INFO "MNL is reserved value %d\n", mnl);
304 goto out_fail;
305 } else if (ELD_FIXED_BYTES + mnl > size) {
306 snd_printd(KERN_INFO "out of range MNL %d\n", mnl);
307 goto out_fail;
308 } else
309 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl);
310
311 for (i = 0; i < e->sad_count; i++) {
312 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
313 snd_printd(KERN_INFO "out of range SAD %d\n", i);
314 goto out_fail;
315 }
316 hdmi_update_short_audio_desc(e->sad + i,
317 buf + ELD_FIXED_BYTES + mnl + 3 * i);
318 }
319
320 return 0;
321
322out_fail:
323 e->eld_ver = 0;
324 return -EINVAL;
325}
326
327static int hdmi_present_sense(struct hda_codec *codec, hda_nid_t nid)
328{
329 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_PIN_SENSE, 0);
330}
331
332static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid)
333{
334 int eldv;
335 int present;
336
337 present = hdmi_present_sense(codec, nid);
338 eldv = (present & AC_PINSENSE_ELDV);
339 present = (present & AC_PINSENSE_PRESENCE);
340
341#ifdef CONFIG_SND_DEBUG_VERBOSE
342 printk(KERN_INFO "pinp = %d, eldv = %d\n", !!present, !!eldv);
343#endif
344
345 return eldv && present;
346}
347
348int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
349{
350 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
351 AC_DIPSIZE_ELD_BUF);
352}
353
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800354int snd_hdmi_get_eld(struct hdmi_eld *eld,
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800355 struct hda_codec *codec, hda_nid_t nid)
356{
357 int i;
358 int ret;
359 int size;
360 unsigned char *buf;
361
362 if (!hdmi_eld_valid(codec, nid))
363 return -ENOENT;
364
365 size = snd_hdmi_get_eld_size(codec, nid);
366 if (size == 0) {
367 /* wfg: workaround for ASUS P5E-VM HDMI board */
368 snd_printd(KERN_INFO "ELD buf size is 0, force 128\n");
369 size = 128;
370 }
371 if (size < ELD_FIXED_BYTES || size > PAGE_SIZE) {
372 snd_printd(KERN_INFO "Invalid ELD buf size %d\n", size);
373 return -ERANGE;
374 }
375
376 buf = kmalloc(size, GFP_KERNEL);
377 if (!buf)
378 return -ENOMEM;
379
380 for (i = 0; i < size; i++)
381 buf[i] = hdmi_get_eld_byte(codec, nid, i);
382
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800383 ret = hdmi_update_eld(eld, buf, size);
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800384
385 kfree(buf);
386 return ret;
387}
388
389static void hdmi_show_short_audio_desc(struct cea_sad *a)
390{
391 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800392 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800393
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800394 if (!a->format)
395 return;
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800396
397 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800398
399 if (a->format == AUDIO_CODING_TYPE_LPCM)
Wu Fengguang218b5ff2008-11-21 09:42:59 +0800400 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2 - 8));
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800401 else if (a->max_bitrate)
402 snprintf(buf2, sizeof(buf2),
403 ", max bitrate = %d", a->max_bitrate);
404 else
405 buf2[0] = '\0';
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800406
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800407 printk(KERN_INFO "supports coding type %s:"
408 " channels = %d, rates =%s%s\n",
409 cea_audio_coding_type_names[a->format],
410 a->channels,
411 buf,
412 buf2);
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800413}
414
Wu Fengguang903b21d2008-11-19 08:56:16 +0800415void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800416{
417 int i, j;
418
419 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
420 if (spk_alloc & (1 << i))
Wu Fengguang06f69d12008-11-19 15:14:01 +0800421 j += snprintf(buf + j, buflen - j, " %s",
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800422 cea_speaker_allocation_names[i]);
423 }
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800424 buf[j] = '\0'; /* necessary when j == 0 */
425}
426
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800427void snd_hdmi_show_eld(struct hdmi_eld *e)
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800428{
429 int i;
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800430
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800431 printk(KERN_INFO "detected monitor %s at connection type %s\n",
432 e->monitor_name,
433 eld_connection_type_names[e->conn_type]);
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800434
Wu Fengguangae8cb4c2008-11-19 15:14:03 +0800435 if (e->spk_alloc) {
436 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
437 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
438 printk(KERN_INFO "available speakers:%s\n", buf);
439 }
Wu Fengguang7f4a9f42008-11-18 11:47:52 +0800440
441 for (i = 0; i < e->sad_count; i++)
442 hdmi_show_short_audio_desc(e->sad + i);
443}
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800444
445#ifdef CONFIG_PROC_FS
446
447static void hdmi_print_sad_info(int i, struct cea_sad *a,
448 struct snd_info_buffer *buffer)
449{
Wu Fengguangd39b4352008-11-19 15:14:02 +0800450 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800451
452 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
453 i, a->format, cea_audio_coding_type_names[a->format]);
454 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
455
456 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
Wu Fengguang06f69d12008-11-19 15:14:01 +0800457 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800458
Wu Fengguangd39b4352008-11-19 15:14:02 +0800459 if (a->format == AUDIO_CODING_TYPE_LPCM) {
460 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
461 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
462 i, a->sample_bits, buf);
463 }
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800464
465 if (a->max_bitrate)
466 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
467 i, a->max_bitrate);
468
469 if (a->profile)
470 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
471}
472
473static void hdmi_print_eld_info(struct snd_info_entry *entry,
474 struct snd_info_buffer *buffer)
475{
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800476 struct hdmi_eld *e = entry->private_data;
Wu Fengguang903b21d2008-11-19 08:56:16 +0800477 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800478 int i;
479
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_versoin_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
Wu Fengguang903b21d2008-11-19 08:56:16 +0800494 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
Wu Fengguang06f69d12008-11-19 15:14:01 +0800495 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800496
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
Wu Fengguang5b87ebb2008-11-19 15:14:00 +0800503int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld)
Wu Fengguang5f1e71b2008-11-18 11:47:53 +0800504{
505 char name[32];
506 struct snd_info_entry *entry;
507 int err;
508
509 snprintf(name, sizeof(name), "eld#%d", codec->addr);
510 err = snd_card_proc_new(codec->bus->card, name, &entry);
511 if (err < 0)
512 return err;
513
514 snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
515 return 0;
516}
517
518#endif