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Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
[deliverable/linux.git] / sound / hda / hdmi_chmap.c
1 /*
2 * HDMI Channel map support helpers
3 */
4
5 #include <linux/module.h>
6 #include <sound/control.h>
7 #include <sound/tlv.h>
8 #include <sound/hda_chmap.h>
9
10 /*
11 * CEA speaker placement:
12 *
13 * FLH FCH FRH
14 * FLW FL FLC FC FRC FR FRW
15 *
16 * LFE
17 * TC
18 *
19 * RL RLC RC RRC RR
20 *
21 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
22 * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
23 */
24 enum cea_speaker_placement {
25 FL = (1 << 0), /* Front Left */
26 FC = (1 << 1), /* Front Center */
27 FR = (1 << 2), /* Front Right */
28 FLC = (1 << 3), /* Front Left Center */
29 FRC = (1 << 4), /* Front Right Center */
30 RL = (1 << 5), /* Rear Left */
31 RC = (1 << 6), /* Rear Center */
32 RR = (1 << 7), /* Rear Right */
33 RLC = (1 << 8), /* Rear Left Center */
34 RRC = (1 << 9), /* Rear Right Center */
35 LFE = (1 << 10), /* Low Frequency Effect */
36 FLW = (1 << 11), /* Front Left Wide */
37 FRW = (1 << 12), /* Front Right Wide */
38 FLH = (1 << 13), /* Front Left High */
39 FCH = (1 << 14), /* Front Center High */
40 FRH = (1 << 15), /* Front Right High */
41 TC = (1 << 16), /* Top Center */
42 };
43
44 static const char * const 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 /*
59 * ELD SA bits in the CEA Speaker Allocation data block
60 */
61 static int eld_speaker_allocation_bits[] = {
62 [0] = FL | FR,
63 [1] = LFE,
64 [2] = FC,
65 [3] = RL | RR,
66 [4] = RC,
67 [5] = FLC | FRC,
68 [6] = RLC | RRC,
69 /* the following are not defined in ELD yet */
70 [7] = FLW | FRW,
71 [8] = FLH | FRH,
72 [9] = TC,
73 [10] = FCH,
74 };
75
76 /*
77 * ALSA sequence is:
78 *
79 * surround40 surround41 surround50 surround51 surround71
80 * ch0 front left = = = =
81 * ch1 front right = = = =
82 * ch2 rear left = = = =
83 * ch3 rear right = = = =
84 * ch4 LFE center center center
85 * ch5 LFE LFE
86 * ch6 side left
87 * ch7 side right
88 *
89 * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR}
90 */
91 static int hdmi_channel_mapping[0x32][8] = {
92 /* stereo */
93 [0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
94 /* 2.1 */
95 [0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
96 /* Dolby Surround */
97 [0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 },
98 /* surround40 */
99 [0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 },
100 /* 4ch */
101 [0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 },
102 /* surround41 */
103 [0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 },
104 /* surround50 */
105 [0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 },
106 /* surround51 */
107 [0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 },
108 /* 7.1 */
109 [0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 },
110 };
111
112 /*
113 * This is an ordered list!
114 *
115 * The preceding ones have better chances to be selected by
116 * hdmi_channel_allocation().
117 */
118 static struct hdac_cea_channel_speaker_allocation channel_allocations[] = {
119 /* channel: 7 6 5 4 3 2 1 0 */
120 { .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } },
121 /* 2.1 */
122 { .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } },
123 /* Dolby Surround */
124 { .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } },
125 /* surround40 */
126 { .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
127 /* surround41 */
128 { .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
129 /* surround50 */
130 { .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
131 /* surround51 */
132 { .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
133 /* 6.1 */
134 { .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
135 /* surround71 */
136 { .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
137
138 { .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } },
139 { .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } },
140 { .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } },
141 { .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } },
142 { .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } },
143 { .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } },
144 { .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } },
145 { .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } },
146 { .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } },
147 { .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } },
148 { .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } },
149 { .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } },
150 { .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } },
151 { .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } },
152 { .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } },
153 { .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } },
154 { .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } },
155 { .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } },
156 { .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } },
157 { .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } },
158 { .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } },
159 { .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } },
160 { .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } },
161 { .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } },
162 { .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } },
163 { .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } },
164 { .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } },
165 { .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } },
166 { .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } },
167 { .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } },
168 { .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } },
169 { .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } },
170 { .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } },
171 { .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } },
172 { .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } },
173 { .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } },
174 { .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } },
175 { .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } },
176 { .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } },
177 { .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } },
178 { .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
179 };
180
181 static int hdmi_pin_set_slot_channel(struct hdac_device *codec,
182 hda_nid_t pin_nid, int asp_slot, int channel)
183 {
184 return snd_hdac_codec_write(codec, pin_nid, 0,
185 AC_VERB_SET_HDMI_CHAN_SLOT,
186 (channel << 4) | asp_slot);
187 }
188
189 static int hdmi_pin_get_slot_channel(struct hdac_device *codec,
190 hda_nid_t pin_nid, int asp_slot)
191 {
192 return (snd_hdac_codec_read(codec, pin_nid, 0,
193 AC_VERB_GET_HDMI_CHAN_SLOT,
194 asp_slot) & 0xf0) >> 4;
195 }
196
197 static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid)
198 {
199 return 1 + snd_hdac_codec_read(codec, cvt_nid, 0,
200 AC_VERB_GET_CVT_CHAN_COUNT, 0);
201 }
202
203 static void hdmi_set_channel_count(struct hdac_device *codec,
204 hda_nid_t cvt_nid, int chs)
205 {
206 if (chs != hdmi_get_channel_count(codec, cvt_nid))
207 snd_hdac_codec_write(codec, cvt_nid, 0,
208 AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
209 }
210
211 /*
212 * Channel mapping routines
213 */
214
215 /*
216 * Compute derived values in channel_allocations[].
217 */
218 static void init_channel_allocations(void)
219 {
220 int i, j;
221 struct hdac_cea_channel_speaker_allocation *p;
222
223 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
224 p = channel_allocations + i;
225 p->channels = 0;
226 p->spk_mask = 0;
227 for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
228 if (p->speakers[j]) {
229 p->channels++;
230 p->spk_mask |= p->speakers[j];
231 }
232 }
233 }
234
235 static int get_channel_allocation_order(int ca)
236 {
237 int i;
238
239 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
240 if (channel_allocations[i].ca_index == ca)
241 break;
242 }
243 return i;
244 }
245
246 void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen)
247 {
248 int i, j;
249
250 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
251 if (spk_alloc & (1 << i))
252 j += snprintf(buf + j, buflen - j, " %s",
253 cea_speaker_allocation_names[i]);
254 }
255 buf[j] = '\0'; /* necessary when j == 0 */
256 }
257 EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation);
258
259 /*
260 * The transformation takes two steps:
261 *
262 * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
263 * spk_mask => (channel_allocations[]) => ai->CA
264 *
265 * TODO: it could select the wrong CA from multiple candidates.
266 */
267 static int hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec,
268 int spk_alloc, int channels)
269 {
270 int i;
271 int ca = 0;
272 int spk_mask = 0;
273 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
274
275 /*
276 * CA defaults to 0 for basic stereo audio
277 */
278 if (channels <= 2)
279 return 0;
280
281 /*
282 * expand ELD's speaker allocation mask
283 *
284 * ELD tells the speaker mask in a compact(paired) form,
285 * expand ELD's notions to match the ones used by Audio InfoFrame.
286 */
287 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
288 if (spk_alloc & (1 << i))
289 spk_mask |= eld_speaker_allocation_bits[i];
290 }
291
292 /* search for the first working match in the CA table */
293 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
294 if (channels == channel_allocations[i].channels &&
295 (spk_mask & channel_allocations[i].spk_mask) ==
296 channel_allocations[i].spk_mask) {
297 ca = channel_allocations[i].ca_index;
298 break;
299 }
300 }
301
302 if (!ca) {
303 /*
304 * if there was no match, select the regular ALSA channel
305 * allocation with the matching number of channels
306 */
307 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
308 if (channels == channel_allocations[i].channels) {
309 ca = channel_allocations[i].ca_index;
310 break;
311 }
312 }
313 }
314
315 snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf));
316 dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n",
317 ca, channels, buf);
318
319 return ca;
320 }
321
322 static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap,
323 hda_nid_t pin_nid)
324 {
325 #ifdef CONFIG_SND_DEBUG_VERBOSE
326 int i;
327 int channel;
328
329 for (i = 0; i < 8; i++) {
330 channel = chmap->ops.pin_get_slot_channel(
331 chmap->hdac, pin_nid, i);
332 dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n",
333 channel, i);
334 }
335 #endif
336 }
337
338 static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap,
339 hda_nid_t pin_nid,
340 bool non_pcm,
341 int ca)
342 {
343 struct hdac_cea_channel_speaker_allocation *ch_alloc;
344 int i;
345 int err;
346 int order;
347 int non_pcm_mapping[8];
348
349 order = get_channel_allocation_order(ca);
350 ch_alloc = &channel_allocations[order];
351
352 if (hdmi_channel_mapping[ca][1] == 0) {
353 int hdmi_slot = 0;
354 /* fill actual channel mappings in ALSA channel (i) order */
355 for (i = 0; i < ch_alloc->channels; i++) {
356 while (!ch_alloc->speakers[7 - hdmi_slot] && !WARN_ON(hdmi_slot >= 8))
357 hdmi_slot++; /* skip zero slots */
358
359 hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
360 }
361 /* fill the rest of the slots with ALSA channel 0xf */
362 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
363 if (!ch_alloc->speakers[7 - hdmi_slot])
364 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
365 }
366
367 if (non_pcm) {
368 for (i = 0; i < ch_alloc->channels; i++)
369 non_pcm_mapping[i] = (i << 4) | i;
370 for (; i < 8; i++)
371 non_pcm_mapping[i] = (0xf << 4) | i;
372 }
373
374 for (i = 0; i < 8; i++) {
375 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i];
376 int hdmi_slot = slotsetup & 0x0f;
377 int channel = (slotsetup & 0xf0) >> 4;
378
379 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
380 pin_nid, hdmi_slot, channel);
381 if (err) {
382 dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n");
383 break;
384 }
385 }
386 }
387
388 struct channel_map_table {
389 unsigned char map; /* ALSA API channel map position */
390 int spk_mask; /* speaker position bit mask */
391 };
392
393 static struct channel_map_table map_tables[] = {
394 { SNDRV_CHMAP_FL, FL },
395 { SNDRV_CHMAP_FR, FR },
396 { SNDRV_CHMAP_RL, RL },
397 { SNDRV_CHMAP_RR, RR },
398 { SNDRV_CHMAP_LFE, LFE },
399 { SNDRV_CHMAP_FC, FC },
400 { SNDRV_CHMAP_RLC, RLC },
401 { SNDRV_CHMAP_RRC, RRC },
402 { SNDRV_CHMAP_RC, RC },
403 { SNDRV_CHMAP_FLC, FLC },
404 { SNDRV_CHMAP_FRC, FRC },
405 { SNDRV_CHMAP_TFL, FLH },
406 { SNDRV_CHMAP_TFR, FRH },
407 { SNDRV_CHMAP_FLW, FLW },
408 { SNDRV_CHMAP_FRW, FRW },
409 { SNDRV_CHMAP_TC, TC },
410 { SNDRV_CHMAP_TFC, FCH },
411 {} /* terminator */
412 };
413
414 /* from ALSA API channel position to speaker bit mask */
415 int snd_hdac_chmap_to_spk_mask(unsigned char c)
416 {
417 struct channel_map_table *t = map_tables;
418
419 for (; t->map; t++) {
420 if (t->map == c)
421 return t->spk_mask;
422 }
423 return 0;
424 }
425 EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
426
427 /* from ALSA API channel position to CEA slot */
428 static int to_cea_slot(int ordered_ca, unsigned char pos)
429 {
430 int mask = snd_hdac_chmap_to_spk_mask(pos);
431 int i;
432
433 if (mask) {
434 for (i = 0; i < 8; i++) {
435 if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
436 return i;
437 }
438 }
439
440 return -1;
441 }
442
443 /* from speaker bit mask to ALSA API channel position */
444 int snd_hdac_spk_to_chmap(int spk)
445 {
446 struct channel_map_table *t = map_tables;
447
448 for (; t->map; t++) {
449 if (t->spk_mask == spk)
450 return t->map;
451 }
452 return 0;
453 }
454 EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
455
456 /* from CEA slot to ALSA API channel position */
457 static int from_cea_slot(int ordered_ca, unsigned char slot)
458 {
459 int mask = channel_allocations[ordered_ca].speakers[7 - slot];
460
461 return snd_hdac_spk_to_chmap(mask);
462 }
463
464 /* get the CA index corresponding to the given ALSA API channel map */
465 static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
466 {
467 int i, spks = 0, spk_mask = 0;
468
469 for (i = 0; i < chs; i++) {
470 int mask = snd_hdac_chmap_to_spk_mask(map[i]);
471
472 if (mask) {
473 spk_mask |= mask;
474 spks++;
475 }
476 }
477
478 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
479 if ((chs == channel_allocations[i].channels ||
480 spks == channel_allocations[i].channels) &&
481 (spk_mask & channel_allocations[i].spk_mask) ==
482 channel_allocations[i].spk_mask)
483 return channel_allocations[i].ca_index;
484 }
485 return -1;
486 }
487
488 /* set up the channel slots for the given ALSA API channel map */
489 static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap,
490 hda_nid_t pin_nid,
491 int chs, unsigned char *map,
492 int ca)
493 {
494 int ordered_ca = get_channel_allocation_order(ca);
495 int alsa_pos, hdmi_slot;
496 int assignments[8] = {[0 ... 7] = 0xf};
497
498 for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
499
500 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);
501
502 if (hdmi_slot < 0)
503 continue; /* unassigned channel */
504
505 assignments[hdmi_slot] = alsa_pos;
506 }
507
508 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
509 int err;
510
511 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
512 pin_nid, hdmi_slot, assignments[hdmi_slot]);
513 if (err)
514 return -EINVAL;
515 }
516 return 0;
517 }
518
519 /* store ALSA API channel map from the current default map */
520 static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
521 {
522 int i;
523 int ordered_ca = get_channel_allocation_order(ca);
524
525 for (i = 0; i < 8; i++) {
526 if (i < channel_allocations[ordered_ca].channels)
527 map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f);
528 else
529 map[i] = 0;
530 }
531 }
532
533 void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
534 hda_nid_t pin_nid, bool non_pcm, int ca,
535 int channels, unsigned char *map,
536 bool chmap_set)
537 {
538 if (!non_pcm && chmap_set) {
539 hdmi_manual_setup_channel_mapping(chmap, pin_nid,
540 channels, map, ca);
541 } else {
542 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca);
543 hdmi_setup_fake_chmap(map, ca);
544 }
545
546 hdmi_debug_channel_mapping(chmap, pin_nid);
547 }
548 EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
549
550 int snd_hdac_get_active_channels(int ca)
551 {
552 int ordered_ca = get_channel_allocation_order(ca);
553
554 return channel_allocations[ordered_ca].channels;
555 }
556 EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
557
558 struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca)
559 {
560 return &channel_allocations[get_channel_allocation_order(ca)];
561 }
562 EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
563
564 int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
565 int channels, bool chmap_set, bool non_pcm, unsigned char *map)
566 {
567 int ca;
568
569 if (!non_pcm && chmap_set)
570 ca = hdmi_manual_channel_allocation(channels, map);
571 else
572 ca = hdmi_channel_allocation_spk_alloc_blk(hdac,
573 spk_alloc, channels);
574
575 if (ca < 0)
576 ca = 0;
577
578 return ca;
579 }
580 EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
581
582 /*
583 * ALSA API channel-map control callbacks
584 */
585 static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
586 struct snd_ctl_elem_info *uinfo)
587 {
588 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
589 struct hdac_chmap *chmap = info->private_data;
590
591 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
592 uinfo->count = chmap->channels_max;
593 uinfo->value.integer.min = 0;
594 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
595 return 0;
596 }
597
598 static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap,
599 struct hdac_cea_channel_speaker_allocation *cap, int channels)
600 {
601 /* If the speaker allocation matches the channel count, it is OK.*/
602 if (cap->channels != channels)
603 return -1;
604
605 /* all channels are remappable freely */
606 return SNDRV_CTL_TLVT_CHMAP_VAR;
607 }
608
609 static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap,
610 struct hdac_cea_channel_speaker_allocation *cap,
611 unsigned int *chmap, int channels)
612 {
613 int count = 0;
614 int c;
615
616 for (c = 7; c >= 0; c--) {
617 int spk = cap->speakers[c];
618
619 if (!spk)
620 continue;
621
622 chmap[count++] = snd_hdac_spk_to_chmap(spk);
623 }
624
625 WARN_ON(count != channels);
626 }
627
628 static int spk_mask_from_spk_alloc(int spk_alloc)
629 {
630 int i;
631 int spk_mask = eld_speaker_allocation_bits[0];
632
633 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
634 if (spk_alloc & (1 << i))
635 spk_mask |= eld_speaker_allocation_bits[i];
636 }
637
638 return spk_mask;
639 }
640
641 static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
642 unsigned int size, unsigned int __user *tlv)
643 {
644 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
645 struct hdac_chmap *chmap = info->private_data;
646 int pcm_idx = kcontrol->private_value;
647 unsigned int __user *dst;
648 int chs, count = 0;
649 unsigned long max_chs;
650 int type;
651 int spk_alloc, spk_mask;
652
653 if (size < 8)
654 return -ENOMEM;
655 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
656 return -EFAULT;
657 size -= 8;
658 dst = tlv + 2;
659
660 spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx);
661 spk_mask = spk_mask_from_spk_alloc(spk_alloc);
662
663 max_chs = hweight_long(spk_mask);
664
665 for (chs = 2; chs <= max_chs; chs++) {
666 int i;
667 struct hdac_cea_channel_speaker_allocation *cap;
668
669 cap = channel_allocations;
670 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
671 int chs_bytes = chs * 4;
672 unsigned int tlv_chmap[8];
673
674 if (cap->channels != chs)
675 continue;
676
677 if (!(cap->spk_mask == (spk_mask & cap->spk_mask)))
678 continue;
679
680 type = chmap->ops.chmap_cea_alloc_validate_get_type(
681 chmap, cap, chs);
682 if (type < 0)
683 return -ENODEV;
684 if (size < 8)
685 return -ENOMEM;
686
687 if (put_user(type, dst) ||
688 put_user(chs_bytes, dst + 1))
689 return -EFAULT;
690
691 dst += 2;
692 size -= 8;
693 count += 8;
694
695 if (size < chs_bytes)
696 return -ENOMEM;
697
698 size -= chs_bytes;
699 count += chs_bytes;
700 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
701 tlv_chmap, chs);
702
703 if (copy_to_user(dst, tlv_chmap, chs_bytes))
704 return -EFAULT;
705 dst += chs;
706 }
707 }
708
709 if (put_user(count, tlv + 1))
710 return -EFAULT;
711
712 return 0;
713 }
714
715 static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
716 struct snd_ctl_elem_value *ucontrol)
717 {
718 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
719 struct hdac_chmap *chmap = info->private_data;
720 int pcm_idx = kcontrol->private_value;
721 unsigned char pcm_chmap[8];
722 int i;
723
724 memset(pcm_chmap, 0, sizeof(pcm_chmap));
725 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap);
726
727 for (i = 0; i < sizeof(chmap); i++)
728 ucontrol->value.integer.value[i] = pcm_chmap[i];
729
730 return 0;
731 }
732
733 static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
734 struct snd_ctl_elem_value *ucontrol)
735 {
736 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
737 struct hdac_chmap *hchmap = info->private_data;
738 int pcm_idx = kcontrol->private_value;
739 unsigned int ctl_idx;
740 struct snd_pcm_substream *substream;
741 unsigned char chmap[8], per_pin_chmap[8];
742 int i, err, ca, prepared = 0;
743
744 /* No monitor is connected in dyn_pcm_assign.
745 * It's invalid to setup the chmap
746 */
747 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
748 return 0;
749
750 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
751 substream = snd_pcm_chmap_substream(info, ctl_idx);
752 if (!substream || !substream->runtime)
753 return 0; /* just for avoiding error from alsactl restore */
754 switch (substream->runtime->status->state) {
755 case SNDRV_PCM_STATE_OPEN:
756 case SNDRV_PCM_STATE_SETUP:
757 break;
758 case SNDRV_PCM_STATE_PREPARED:
759 prepared = 1;
760 break;
761 default:
762 return -EBUSY;
763 }
764 memset(chmap, 0, sizeof(chmap));
765 for (i = 0; i < ARRAY_SIZE(chmap); i++)
766 chmap[i] = ucontrol->value.integer.value[i];
767
768 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
769 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
770 return 0;
771 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
772 if (ca < 0)
773 return -EINVAL;
774 if (hchmap->ops.chmap_validate) {
775 err = hchmap->ops.chmap_validate(hchmap, ca,
776 ARRAY_SIZE(chmap), chmap);
777 if (err)
778 return err;
779 }
780
781 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
782
783 return 0;
784 }
785
786 static const struct hdac_chmap_ops chmap_ops = {
787 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type,
788 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap,
789 .pin_get_slot_channel = hdmi_pin_get_slot_channel,
790 .pin_set_slot_channel = hdmi_pin_set_slot_channel,
791 .set_channel_count = hdmi_set_channel_count,
792 };
793
794 void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
795 struct hdac_chmap *chmap)
796 {
797 chmap->ops = chmap_ops;
798 chmap->hdac = hdac;
799 init_channel_allocations();
800 }
801 EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
802
803 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
804 struct hdac_chmap *hchmap)
805 {
806 struct snd_pcm_chmap *chmap;
807 struct snd_kcontrol *kctl;
808 int err, i;
809
810 err = snd_pcm_add_chmap_ctls(pcm,
811 SNDRV_PCM_STREAM_PLAYBACK,
812 NULL, 0, pcm_idx, &chmap);
813 if (err < 0)
814 return err;
815 /* override handlers */
816 chmap->private_data = hchmap;
817 kctl = chmap->kctl;
818 for (i = 0; i < kctl->count; i++)
819 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
820 kctl->info = hdmi_chmap_ctl_info;
821 kctl->get = hdmi_chmap_ctl_get;
822 kctl->put = hdmi_chmap_ctl_put;
823 kctl->tlv.c = hdmi_chmap_ctl_tlv;
824
825 return 0;
826 }
827 EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);
Linux kernel - Deliverables
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