ALSA: HDA: set max_channel only based on LPCM capability
[linux-2.6.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  *
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 <linux/slab.h>
26 #include <sound/core.h>
27 #include <asm/unaligned.h>
28 #include "hda_codec.h"
29 #include "hda_local.h"
30
31 enum eld_versions {
32         ELD_VER_CEA_861D        = 2,
33         ELD_VER_PARTIAL         = 31,
34 };
35
36 enum cea_edid_versions {
37         CEA_EDID_VER_NONE       = 0,
38         CEA_EDID_VER_CEA861     = 1,
39         CEA_EDID_VER_CEA861A    = 2,
40         CEA_EDID_VER_CEA861BCD  = 3,
41         CEA_EDID_VER_RESERVED   = 4,
42 };
43
44 static char *cea_speaker_allocation_names[] = {
45         /*  0 */ "FL/FR",
46         /*  1 */ "LFE",
47         /*  2 */ "FC",
48         /*  3 */ "RL/RR",
49         /*  4 */ "RC",
50         /*  5 */ "FLC/FRC",
51         /*  6 */ "RLC/RRC",
52         /*  7 */ "FLW/FRW",
53         /*  8 */ "FLH/FRH",
54         /*  9 */ "TC",
55         /* 10 */ "FCH",
56 };
57
58 static char *eld_connection_type_names[4] = {
59         "HDMI",
60         "DisplayPort",
61         "2-reserved",
62         "3-reserved"
63 };
64
65 enum cea_audio_coding_types {
66         AUDIO_CODING_TYPE_REF_STREAM_HEADER     =  0,
67         AUDIO_CODING_TYPE_LPCM                  =  1,
68         AUDIO_CODING_TYPE_AC3                   =  2,
69         AUDIO_CODING_TYPE_MPEG1                 =  3,
70         AUDIO_CODING_TYPE_MP3                   =  4,
71         AUDIO_CODING_TYPE_MPEG2                 =  5,
72         AUDIO_CODING_TYPE_AACLC                 =  6,
73         AUDIO_CODING_TYPE_DTS                   =  7,
74         AUDIO_CODING_TYPE_ATRAC                 =  8,
75         AUDIO_CODING_TYPE_SACD                  =  9,
76         AUDIO_CODING_TYPE_EAC3                  = 10,
77         AUDIO_CODING_TYPE_DTS_HD                = 11,
78         AUDIO_CODING_TYPE_MLP                   = 12,
79         AUDIO_CODING_TYPE_DST                   = 13,
80         AUDIO_CODING_TYPE_WMAPRO                = 14,
81         AUDIO_CODING_TYPE_REF_CXT               = 15,
82         /* also include valid xtypes below */
83         AUDIO_CODING_TYPE_HE_AAC                = 15,
84         AUDIO_CODING_TYPE_HE_AAC2               = 16,
85         AUDIO_CODING_TYPE_MPEG_SURROUND         = 17,
86 };
87
88 enum cea_audio_coding_xtypes {
89         AUDIO_CODING_XTYPE_HE_REF_CT            = 0,
90         AUDIO_CODING_XTYPE_HE_AAC               = 1,
91         AUDIO_CODING_XTYPE_HE_AAC2              = 2,
92         AUDIO_CODING_XTYPE_MPEG_SURROUND        = 3,
93         AUDIO_CODING_XTYPE_FIRST_RESERVED       = 4,
94 };
95
96 static char *cea_audio_coding_type_names[] = {
97         /*  0 */ "undefined",
98         /*  1 */ "LPCM",
99         /*  2 */ "AC-3",
100         /*  3 */ "MPEG1",
101         /*  4 */ "MP3",
102         /*  5 */ "MPEG2",
103         /*  6 */ "AAC-LC",
104         /*  7 */ "DTS",
105         /*  8 */ "ATRAC",
106         /*  9 */ "DSD (One Bit Audio)",
107         /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
108         /* 11 */ "DTS-HD",
109         /* 12 */ "MLP (Dolby TrueHD)",
110         /* 13 */ "DST",
111         /* 14 */ "WMAPro",
112         /* 15 */ "HE-AAC",
113         /* 16 */ "HE-AACv2",
114         /* 17 */ "MPEG Surround",
115 };
116
117 /*
118  * The following two lists are shared between
119  *      - HDMI audio InfoFrame (source to sink)
120  *      - CEA E-EDID Extension (sink to source)
121  */
122
123 /*
124  * SS1:SS0 index => sample size
125  */
126 static int cea_sample_sizes[4] = {
127         0,                      /* 0: Refer to Stream Header */
128         AC_SUPPCM_BITS_16,      /* 1: 16 bits */
129         AC_SUPPCM_BITS_20,      /* 2: 20 bits */
130         AC_SUPPCM_BITS_24,      /* 3: 24 bits */
131 };
132
133 /*
134  * SF2:SF1:SF0 index => sampling frequency
135  */
136 static int cea_sampling_frequencies[8] = {
137         0,                      /* 0: Refer to Stream Header */
138         SNDRV_PCM_RATE_32000,   /* 1:  32000Hz */
139         SNDRV_PCM_RATE_44100,   /* 2:  44100Hz */
140         SNDRV_PCM_RATE_48000,   /* 3:  48000Hz */
141         SNDRV_PCM_RATE_88200,   /* 4:  88200Hz */
142         SNDRV_PCM_RATE_96000,   /* 5:  96000Hz */
143         SNDRV_PCM_RATE_176400,  /* 6: 176400Hz */
144         SNDRV_PCM_RATE_192000,  /* 7: 192000Hz */
145 };
146
147 static unsigned int hdmi_get_eld_data(struct hda_codec *codec, hda_nid_t nid,
148                                         int byte_index)
149 {
150         unsigned int val;
151
152         val = snd_hda_codec_read(codec, nid, 0,
153                                         AC_VERB_GET_HDMI_ELDD, byte_index);
154 #ifdef BE_PARANOID
155         printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
156 #endif
157         return val;
158 }
159
160 static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid,
161                                         int byte_index)
162 {
163         unsigned int val;
164
165         val = hdmi_get_eld_data(codec, nid, byte_index);
166
167         if ((val & AC_ELDD_ELD_VALID) == 0) {
168                 snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n",
169                                                                 byte_index);
170                 val = 0;
171         }
172
173         return val & AC_ELDD_ELD_DATA;
174 }
175
176 #define GRAB_BITS(buf, byte, lowbit, bits)              \
177 ({                                                      \
178         BUILD_BUG_ON(lowbit > 7);                       \
179         BUILD_BUG_ON(bits > 8);                         \
180         BUILD_BUG_ON(bits <= 0);                        \
181                                                         \
182         (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1);  \
183 })
184
185 static void hdmi_update_short_audio_desc(struct cea_sad *a,
186                                          const unsigned char *buf)
187 {
188         int i;
189         int val;
190
191         val = GRAB_BITS(buf, 1, 0, 7);
192         a->rates = 0;
193         for (i = 0; i < 7; i++)
194                 if (val & (1 << i))
195                         a->rates |= cea_sampling_frequencies[i + 1];
196
197         a->channels = GRAB_BITS(buf, 0, 0, 3);
198         a->channels++;
199
200         a->sample_bits = 0;
201         a->max_bitrate = 0;
202
203         a->format = GRAB_BITS(buf, 0, 3, 4);
204         switch (a->format) {
205         case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
206                 snd_printd(KERN_INFO
207                                 "HDMI: audio coding type 0 not expected\n");
208                 break;
209
210         case AUDIO_CODING_TYPE_LPCM:
211                 val = GRAB_BITS(buf, 2, 0, 3);
212                 for (i = 0; i < 3; i++)
213                         if (val & (1 << i))
214                                 a->sample_bits |= cea_sample_sizes[i + 1];
215                 break;
216
217         case AUDIO_CODING_TYPE_AC3:
218         case AUDIO_CODING_TYPE_MPEG1:
219         case AUDIO_CODING_TYPE_MP3:
220         case AUDIO_CODING_TYPE_MPEG2:
221         case AUDIO_CODING_TYPE_AACLC:
222         case AUDIO_CODING_TYPE_DTS:
223         case AUDIO_CODING_TYPE_ATRAC:
224                 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
225                 a->max_bitrate *= 8000;
226                 break;
227
228         case AUDIO_CODING_TYPE_SACD:
229                 break;
230
231         case AUDIO_CODING_TYPE_EAC3:
232                 break;
233
234         case AUDIO_CODING_TYPE_DTS_HD:
235                 break;
236
237         case AUDIO_CODING_TYPE_MLP:
238                 break;
239
240         case AUDIO_CODING_TYPE_DST:
241                 break;
242
243         case AUDIO_CODING_TYPE_WMAPRO:
244                 a->profile = GRAB_BITS(buf, 2, 0, 3);
245                 break;
246
247         case AUDIO_CODING_TYPE_REF_CXT:
248                 a->format = GRAB_BITS(buf, 2, 3, 5);
249                 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT ||
250                     a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
251                         snd_printd(KERN_INFO
252                                 "HDMI: audio coding xtype %d not expected\n",
253                                 a->format);
254                         a->format = 0;
255                 } else
256                         a->format += AUDIO_CODING_TYPE_HE_AAC -
257                                      AUDIO_CODING_XTYPE_HE_AAC;
258                 break;
259         }
260 }
261
262 /*
263  * Be careful, ELD buf could be totally rubbish!
264  */
265 static int hdmi_update_eld(struct hdmi_eld *e,
266                            const unsigned char *buf, int size)
267 {
268         int mnl;
269         int i;
270
271         e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
272         if (e->eld_ver != ELD_VER_CEA_861D &&
273             e->eld_ver != ELD_VER_PARTIAL) {
274                 snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
275                                                                 e->eld_ver);
276                 goto out_fail;
277         }
278
279         e->eld_size = size;
280         e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
281         mnl             = GRAB_BITS(buf, 4, 0, 5);
282         e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
283
284         e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
285         e->support_ai   = GRAB_BITS(buf, 5, 1, 1);
286         e->conn_type    = GRAB_BITS(buf, 5, 2, 2);
287         e->sad_count    = GRAB_BITS(buf, 5, 4, 4);
288
289         e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
290         e->spk_alloc    = GRAB_BITS(buf, 7, 0, 7);
291
292         e->port_id        = get_unaligned_le64(buf + 8);
293
294         /* not specified, but the spec's tendency is little endian */
295         e->manufacture_id = get_unaligned_le16(buf + 16);
296         e->product_id     = get_unaligned_le16(buf + 18);
297
298         if (mnl > ELD_MAX_MNL) {
299                 snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
300                 goto out_fail;
301         } else if (ELD_FIXED_BYTES + mnl > size) {
302                 snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
303                 goto out_fail;
304         } else
305                 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl + 1);
306
307         for (i = 0; i < e->sad_count; i++) {
308                 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
309                         snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
310                         goto out_fail;
311                 }
312                 hdmi_update_short_audio_desc(e->sad + i,
313                                         buf + ELD_FIXED_BYTES + mnl + 3 * i);
314         }
315
316         e->eld_valid = true;
317         return 0;
318
319 out_fail:
320         return -EINVAL;
321 }
322
323 #define GET_BITS(val, lowbit, bits)                     \
324 ({                                                      \
325         BUILD_BUG_ON(lowbit > 7);                       \
326         BUILD_BUG_ON(bits > 8);                         \
327         BUILD_BUG_ON(bits <= 0);                        \
328                                                         \
329         (val >> (lowbit)) & ((1 << (bits)) - 1);        \
330 })
331
332 /* update ELD information relevant for getting PCM info */
333 static int hdmi_update_lpcm_sad_eld (struct hda_codec *codec, hda_nid_t nid,
334                                      struct hdmi_eld *e, int size)
335 {
336         int i, j;
337         u32 val, sad_base;
338         struct cea_sad *a;
339
340         val = hdmi_get_eld_byte(codec, nid, 0);
341         e->eld_ver = GET_BITS(val, 3, 5);
342         if (e->eld_ver != ELD_VER_CEA_861D &&
343             e->eld_ver != ELD_VER_PARTIAL) {
344                 snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
345                                                                 e->eld_ver);
346                 goto out_fail;
347         }
348
349         val = hdmi_get_eld_byte(codec, nid, 4);
350         sad_base = GET_BITS(val, 0, 5);
351         sad_base += ELD_FIXED_BYTES;
352
353         val = hdmi_get_eld_byte(codec, nid, 5);
354         e->sad_count = GET_BITS(val, 4, 4);
355
356         for (i = 0; i < e->sad_count; i++, sad_base += 3) {
357                 if ((sad_base + 3) > size) {
358                         snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
359                         goto out_fail;
360                 }
361                 a = &e->sad[i];
362
363                 val = hdmi_get_eld_byte(codec, nid, sad_base);
364                 a->format = GET_BITS(val, 3, 4);
365                 a->channels = GET_BITS(val, 0, 3);
366                 a->channels++;
367
368                 a->rates = 0;
369                 a->sample_bits = 0;
370                 a->max_bitrate = 0;
371
372                 if (a->format != AUDIO_CODING_TYPE_LPCM)
373                         continue;
374
375                 val = hdmi_get_eld_byte(codec, nid, sad_base + 1);
376                 val = GET_BITS(val, 0, 7);
377                 for (j = 0; j < 7; j++)
378                         if (val & (1 << j))
379                                 a->rates |= cea_sampling_frequencies[j + 1];
380
381                 val = hdmi_get_eld_byte(codec, nid, sad_base + 2);
382                 val = GET_BITS(val, 0, 3);
383                 for (j = 0; j < 3; j++)
384                         if (val & (1 << j))
385                                 a->sample_bits |= cea_sample_sizes[j + 1];
386         }
387
388         e->lpcm_sad_ready = 1;
389         return 0;
390
391 out_fail:
392         e->eld_ver = 0;
393         return -EINVAL;
394 }
395
396 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
397 {
398         return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
399                                                  AC_DIPSIZE_ELD_BUF);
400 }
401
402 int snd_hdmi_get_eld(struct hdmi_eld *eld,
403                      struct hda_codec *codec, hda_nid_t nid)
404 {
405         int i;
406         int ret;
407         int size;
408         unsigned char *buf;
409
410         size = snd_hdmi_get_eld_size(codec, nid);
411         if (size == 0) {
412                 /* wfg: workaround for ASUS P5E-VM HDMI board */
413                 snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n");
414                 size = 128;
415         }
416         if (size < ELD_FIXED_BYTES || size > PAGE_SIZE) {
417                 snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size);
418                 return -ERANGE;
419         }
420
421         if (!eld->lpcm_sad_ready)
422                 hdmi_update_lpcm_sad_eld(codec, nid, eld, size);
423
424         codec->recv_dec_cap = 0;
425         for (i = 0; i < eld->sad_count; i++) {
426                 if (eld->sad[i].format == AUDIO_CODING_TYPE_AC3) {
427                         codec->recv_dec_cap |= (1 << AUDIO_CODING_TYPE_AC3);
428                 } else if (eld->sad[i].format == AUDIO_CODING_TYPE_DTS) {
429                         codec->recv_dec_cap |= (1 << AUDIO_CODING_TYPE_DTS);
430                 }
431         }
432
433         buf = kmalloc(size, GFP_KERNEL);
434         if (!buf)
435                 return -ENOMEM;
436
437         for (i = 0; i < size; i++) {
438                 unsigned int val = hdmi_get_eld_data(codec, nid, i);
439                 if (!(val & AC_ELDD_ELD_VALID)) {
440                         if (!i) {
441                                 snd_printd(KERN_INFO
442                                            "HDMI: invalid ELD data\n");
443                                 ret = -EINVAL;
444                                 goto error;
445                         }
446                         snd_printd(KERN_INFO
447                                   "HDMI: invalid ELD data byte %d\n", i);
448                         val = 0;
449                 } else
450                         val &= AC_ELDD_ELD_DATA;
451                 buf[i] = val;
452         }
453
454         ret = hdmi_update_eld(eld, buf, size);
455
456 error:
457         kfree(buf);
458         return ret;
459 }
460
461 static void hdmi_show_short_audio_desc(struct cea_sad *a)
462 {
463         char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
464         char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
465
466         if (!a->format)
467                 return;
468
469         snd_print_pcm_rates(a->rates, buf, sizeof(buf));
470
471         if (a->format == AUDIO_CODING_TYPE_LPCM)
472                 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8);
473         else if (a->max_bitrate)
474                 snprintf(buf2, sizeof(buf2),
475                                 ", max bitrate = %d", a->max_bitrate);
476         else
477                 buf2[0] = '\0';
478
479         printk(KERN_INFO "HDMI: supports coding type %s:"
480                         " channels = %d, rates =%s%s\n",
481                         cea_audio_coding_type_names[a->format],
482                         a->channels,
483                         buf,
484                         buf2);
485 }
486
487 void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
488 {
489         int i, j;
490
491         for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
492                 if (spk_alloc & (1 << i))
493                         j += snprintf(buf + j, buflen - j,  " %s",
494                                         cea_speaker_allocation_names[i]);
495         }
496         buf[j] = '\0';  /* necessary when j == 0 */
497 }
498
499 void snd_hdmi_show_eld(struct hdmi_eld *e)
500 {
501         int i;
502
503         printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n",
504                         e->monitor_name,
505                         eld_connection_type_names[e->conn_type]);
506
507         if (e->spk_alloc) {
508                 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
509                 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
510                 printk(KERN_INFO "HDMI: available speakers:%s\n", buf);
511         }
512
513         for (i = 0; i < e->sad_count; i++)
514                 hdmi_show_short_audio_desc(e->sad + i);
515 }
516
517 #ifdef CONFIG_PROC_FS
518
519 static void hdmi_print_sad_info(int i, struct cea_sad *a,
520                                 struct snd_info_buffer *buffer)
521 {
522         char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
523
524         snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
525                         i, a->format, cea_audio_coding_type_names[a->format]);
526         snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
527
528         snd_print_pcm_rates(a->rates, buf, sizeof(buf));
529         snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
530
531         if (a->format == AUDIO_CODING_TYPE_LPCM) {
532                 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
533                 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
534                                                         i, a->sample_bits, buf);
535         }
536
537         if (a->max_bitrate)
538                 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
539                                                         i, a->max_bitrate);
540
541         if (a->profile)
542                 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
543 }
544
545 static void hdmi_print_eld_info(struct snd_info_entry *entry,
546                                 struct snd_info_buffer *buffer)
547 {
548         struct hdmi_eld *e = entry->private_data;
549         char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
550         int i;
551         static char *eld_versoin_names[32] = {
552                 "reserved",
553                 "reserved",
554                 "CEA-861D or below",
555                 [3 ... 30] = "reserved",
556                 [31] = "partial"
557         };
558         static char *cea_edid_version_names[8] = {
559                 "no CEA EDID Timing Extension block present",
560                 "CEA-861",
561                 "CEA-861-A",
562                 "CEA-861-B, C or D",
563                 [4 ... 7] = "reserved"
564         };
565
566         snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present);
567         snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid);
568         if (!e->eld_valid)
569                 return;
570         snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
571         snd_iprintf(buffer, "connection_type\t\t%s\n",
572                                 eld_connection_type_names[e->conn_type]);
573         snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
574                                         eld_versoin_names[e->eld_ver]);
575         snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
576                                 cea_edid_version_names[e->cea_edid_ver]);
577         snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
578         snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
579         snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
580         snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
581         snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
582         snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
583
584         snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
585         snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
586
587         snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
588
589         for (i = 0; i < e->sad_count; i++)
590                 hdmi_print_sad_info(i, e->sad + i, buffer);
591 }
592
593 static void hdmi_write_eld_info(struct snd_info_entry *entry,
594                                 struct snd_info_buffer *buffer)
595 {
596         struct hdmi_eld *e = entry->private_data;
597         char line[64];
598         char name[64];
599         char *sname;
600         long long val;
601         unsigned int n;
602
603         while (!snd_info_get_line(buffer, line, sizeof(line))) {
604                 if (sscanf(line, "%s %llx", name, &val) != 2)
605                         continue;
606                 /*
607                  * We don't allow modification to these fields:
608                  *      monitor_name manufacture_id product_id
609                  *      eld_version edid_version
610                  */
611                 if (!strcmp(name, "monitor_present"))
612                         e->monitor_present = val;
613                 else if (!strcmp(name, "eld_valid"))
614                         e->eld_valid = val;
615                 else if (!strcmp(name, "connection_type"))
616                         e->conn_type = val;
617                 else if (!strcmp(name, "port_id"))
618                         e->port_id = val;
619                 else if (!strcmp(name, "support_hdcp"))
620                         e->support_hdcp = val;
621                 else if (!strcmp(name, "support_ai"))
622                         e->support_ai = val;
623                 else if (!strcmp(name, "audio_sync_delay"))
624                         e->aud_synch_delay = val;
625                 else if (!strcmp(name, "speakers"))
626                         e->spk_alloc = val;
627                 else if (!strcmp(name, "sad_count"))
628                         e->sad_count = val;
629                 else if (!strncmp(name, "sad", 3)) {
630                         sname = name + 4;
631                         n = name[3] - '0';
632                         if (name[4] >= '0' && name[4] <= '9') {
633                                 sname++;
634                                 n = 10 * n + name[4] - '0';
635                         }
636                         if (n >= ELD_MAX_SAD)
637                                 continue;
638                         if (!strcmp(sname, "_coding_type"))
639                                 e->sad[n].format = val;
640                         else if (!strcmp(sname, "_channels"))
641                                 e->sad[n].channels = val;
642                         else if (!strcmp(sname, "_rates"))
643                                 e->sad[n].rates = val;
644                         else if (!strcmp(sname, "_bits"))
645                                 e->sad[n].sample_bits = val;
646                         else if (!strcmp(sname, "_max_bitrate"))
647                                 e->sad[n].max_bitrate = val;
648                         else if (!strcmp(sname, "_profile"))
649                                 e->sad[n].profile = val;
650                         if (n >= e->sad_count)
651                                 e->sad_count = n + 1;
652                 }
653         }
654 }
655
656
657 int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
658                          int index)
659 {
660         char name[32];
661         struct snd_info_entry *entry;
662         int err;
663
664         snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
665         err = snd_card_proc_new(codec->bus->card, name, &entry);
666         if (err < 0)
667                 return err;
668
669         snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
670         entry->c.text.write = hdmi_write_eld_info;
671         entry->mode |= S_IWUSR;
672         eld->proc_entry = entry;
673
674         return 0;
675 }
676
677 void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
678 {
679         if (!codec->bus->shutdown && eld->proc_entry) {
680                 snd_device_free(codec->bus->card, eld->proc_entry);
681                 eld->proc_entry = NULL;
682         }
683 }
684
685 #endif /* CONFIG_PROC_FS */
686
687 /* update PCM info based on ELD */
688 void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
689                               struct hda_pcm_stream *hinfo)
690 {
691         u32 rates;
692         u64 formats;
693         unsigned int maxbps;
694         unsigned int channels_max;
695         int i;
696
697         /* assume basic audio support (the basic audio flag is not in ELD;
698          * however, all audio capable sinks are required to support basic
699          * audio) */
700         rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
701                 SNDRV_PCM_RATE_48000;
702         formats = SNDRV_PCM_FMTBIT_S16_LE;
703         maxbps = 16;
704         channels_max = 2;
705         for (i = 0; i < eld->sad_count; i++) {
706                 struct cea_sad *a = &eld->sad[i];
707
708                 rates |= a->rates;
709                 if (a->format == AUDIO_CODING_TYPE_LPCM) {
710                         if (a->channels > channels_max)
711                                 channels_max = a->channels;
712                         if (a->sample_bits & AC_SUPPCM_BITS_20) {
713                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
714                                 if (maxbps < 20)
715                                         maxbps = 20;
716                         }
717                         if (a->sample_bits & AC_SUPPCM_BITS_24) {
718                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
719                                 if (maxbps < 24)
720                                         maxbps = 24;
721                         }
722                 }
723         }
724
725         /* restrict the parameters by the values the codec provides */
726         hinfo->rates &= rates;
727         hinfo->formats &= formats;
728         hinfo->maxbps = min(hinfo->maxbps, maxbps);
729         hinfo->channels_max = min(hinfo->channels_max, channels_max);
730 }