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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 */
24enum 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
44static 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 */
61static 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 */
91static 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 */
118static 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
181static 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
189static 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
197static 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
203static 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 */
218static 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
235static 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
246void 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}
257EXPORT_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*/
267static 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
322static 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
338static 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
388struct channel_map_table {
389 unsigned char map; /* ALSA API channel map position */
390 int spk_mask; /* speaker position bit mask */
391};
392
393static 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 */
415int 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}
425EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
426
427/* from ALSA API channel position to CEA slot */
428static 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 */
444int 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}
454EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
455
456/* from CEA slot to ALSA API channel position */
457static 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 */
465static 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 */
489static 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 */
520static 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
533void 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}
548EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
549
550int 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}
556EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
557
558struct 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}
562EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
563
564int 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}
580EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
581
582/*
583 * ALSA API channel-map control callbacks
584 */
585static 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
598static 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
609static 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
628static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
629 unsigned int size, unsigned int __user *tlv)
630{
631 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
632 struct hdac_chmap *chmap = info->private_data;
633 unsigned int __user *dst;
634 int chs, count = 0;
635
636 if (size < 8)
637 return -ENOMEM;
638 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
639 return -EFAULT;
640 size -= 8;
641 dst = tlv + 2;
642 for (chs = 2; chs <= chmap->channels_max; chs++) {
643 int i;
644 struct hdac_cea_channel_speaker_allocation *cap;
645
646 cap = channel_allocations;
647 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
648 int chs_bytes = chs * 4;
649 int type = chmap->ops.chmap_cea_alloc_validate_get_type(
650 chmap, cap, chs);
651 unsigned int tlv_chmap[8];
652
653 if (type < 0)
654 continue;
655 if (size < 8)
656 return -ENOMEM;
657 if (put_user(type, dst) ||
658 put_user(chs_bytes, dst + 1))
659 return -EFAULT;
660 dst += 2;
661 size -= 8;
662 count += 8;
663 if (size < chs_bytes)
664 return -ENOMEM;
665 size -= chs_bytes;
666 count += chs_bytes;
667 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
668 tlv_chmap, chs);
669 if (copy_to_user(dst, tlv_chmap, chs_bytes))
670 return -EFAULT;
671 dst += chs;
672 }
673 }
674 if (put_user(count, tlv + 1))
675 return -EFAULT;
676 return 0;
677}
678
679static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
680 struct snd_ctl_elem_value *ucontrol)
681{
682 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
683 struct hdac_chmap *chmap = info->private_data;
684 int pcm_idx = kcontrol->private_value;
685 unsigned char pcm_chmap[8];
686 int i;
687
688 memset(pcm_chmap, 0, sizeof(pcm_chmap));
689 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap);
690
691 for (i = 0; i < sizeof(chmap); i++)
692 ucontrol->value.integer.value[i] = pcm_chmap[i];
693
694 return 0;
695}
696
697static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
698 struct snd_ctl_elem_value *ucontrol)
699{
700 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
701 struct hdac_chmap *hchmap = info->private_data;
702 int pcm_idx = kcontrol->private_value;
703 unsigned int ctl_idx;
704 struct snd_pcm_substream *substream;
705 unsigned char chmap[8], per_pin_chmap[8];
706 int i, err, ca, prepared = 0;
707
708 /* No monitor is connected in dyn_pcm_assign.
709 * It's invalid to setup the chmap
710 */
711 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
712 return 0;
713
714 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
715 substream = snd_pcm_chmap_substream(info, ctl_idx);
716 if (!substream || !substream->runtime)
717 return 0; /* just for avoiding error from alsactl restore */
718 switch (substream->runtime->status->state) {
719 case SNDRV_PCM_STATE_OPEN:
720 case SNDRV_PCM_STATE_SETUP:
721 break;
722 case SNDRV_PCM_STATE_PREPARED:
723 prepared = 1;
724 break;
725 default:
726 return -EBUSY;
727 }
728 memset(chmap, 0, sizeof(chmap));
729 for (i = 0; i < ARRAY_SIZE(chmap); i++)
730 chmap[i] = ucontrol->value.integer.value[i];
731
732 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
733 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
734 return 0;
735 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
736 if (ca < 0)
737 return -EINVAL;
738 if (hchmap->ops.chmap_validate) {
739 err = hchmap->ops.chmap_validate(hchmap, ca,
740 ARRAY_SIZE(chmap), chmap);
741 if (err)
742 return err;
743 }
744
745 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
746
747 return 0;
748}
749
750static const struct hdac_chmap_ops chmap_ops = {
751 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type,
752 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap,
753 .pin_get_slot_channel = hdmi_pin_get_slot_channel,
754 .pin_set_slot_channel = hdmi_pin_set_slot_channel,
755 .set_channel_count = hdmi_set_channel_count,
756};
757
758void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
759 struct hdac_chmap *chmap)
760{
761 chmap->ops = chmap_ops;
762 chmap->hdac = hdac;
763 init_channel_allocations();
764}
765EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
766
767int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
768 struct hdac_chmap *hchmap)
769{
770 struct snd_pcm_chmap *chmap;
771 struct snd_kcontrol *kctl;
772 int err, i;
773
774 err = snd_pcm_add_chmap_ctls(pcm,
775 SNDRV_PCM_STREAM_PLAYBACK,
776 NULL, 0, pcm_idx, &chmap);
777 if (err < 0)
778 return err;
779 /* override handlers */
780 chmap->private_data = hchmap;
781 kctl = chmap->kctl;
782 for (i = 0; i < kctl->count; i++)
783 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
784 kctl->info = hdmi_chmap_ctl_info;
785 kctl->get = hdmi_chmap_ctl_get;
786 kctl->put = hdmi_chmap_ctl_put;
787 kctl->tlv.c = hdmi_chmap_ctl_tlv;
788
789 return 0;
790}
791EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);