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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 (!WARN_ON(hdmi_slot >= 8) &&
357 !ch_alloc->speakers[7 - hdmi_slot])
358 hdmi_slot++; /* skip zero slots */
359
360 hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
361 }
362 /* fill the rest of the slots with ALSA channel 0xf */
363 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
364 if (!ch_alloc->speakers[7 - hdmi_slot])
365 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
366 }
367
368 if (non_pcm) {
369 for (i = 0; i < ch_alloc->channels; i++)
370 non_pcm_mapping[i] = (i << 4) | i;
371 for (; i < 8; i++)
372 non_pcm_mapping[i] = (0xf << 4) | i;
373 }
374
375 for (i = 0; i < 8; i++) {
376 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i];
377 int hdmi_slot = slotsetup & 0x0f;
378 int channel = (slotsetup & 0xf0) >> 4;
379
380 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
381 pin_nid, hdmi_slot, channel);
382 if (err) {
383 dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n");
384 break;
385 }
386 }
387}
388
389struct channel_map_table {
390 unsigned char map; /* ALSA API channel map position */
391 int spk_mask; /* speaker position bit mask */
392};
393
394static struct channel_map_table map_tables[] = {
395 { SNDRV_CHMAP_FL, FL },
396 { SNDRV_CHMAP_FR, FR },
397 { SNDRV_CHMAP_RL, RL },
398 { SNDRV_CHMAP_RR, RR },
399 { SNDRV_CHMAP_LFE, LFE },
400 { SNDRV_CHMAP_FC, FC },
401 { SNDRV_CHMAP_RLC, RLC },
402 { SNDRV_CHMAP_RRC, RRC },
403 { SNDRV_CHMAP_RC, RC },
404 { SNDRV_CHMAP_FLC, FLC },
405 { SNDRV_CHMAP_FRC, FRC },
406 { SNDRV_CHMAP_TFL, FLH },
407 { SNDRV_CHMAP_TFR, FRH },
408 { SNDRV_CHMAP_FLW, FLW },
409 { SNDRV_CHMAP_FRW, FRW },
410 { SNDRV_CHMAP_TC, TC },
411 { SNDRV_CHMAP_TFC, FCH },
412 {} /* terminator */
413};
414
415/* from ALSA API channel position to speaker bit mask */
416int snd_hdac_chmap_to_spk_mask(unsigned char c)
417{
418 struct channel_map_table *t = map_tables;
419
420 for (; t->map; t++) {
421 if (t->map == c)
422 return t->spk_mask;
423 }
424 return 0;
425}
426EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
427
428/* from ALSA API channel position to CEA slot */
429static int to_cea_slot(int ordered_ca, unsigned char pos)
430{
431 int mask = snd_hdac_chmap_to_spk_mask(pos);
432 int i;
433
434 /* Add sanity check to pass klockwork check.
435 * This should never happen.
436 */
437 if (ordered_ca >= ARRAY_SIZE(channel_allocations))
438 return -1;
439
440 if (mask) {
441 for (i = 0; i < 8; i++) {
442 if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
443 return i;
444 }
445 }
446
447 return -1;
448}
449
450/* from speaker bit mask to ALSA API channel position */
451int snd_hdac_spk_to_chmap(int spk)
452{
453 struct channel_map_table *t = map_tables;
454
455 for (; t->map; t++) {
456 if (t->spk_mask == spk)
457 return t->map;
458 }
459 return 0;
460}
461EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
462
463/* from CEA slot to ALSA API channel position */
464static int from_cea_slot(int ordered_ca, unsigned char slot)
465{
466 int mask;
467
468 /* Add sanity check to pass klockwork check.
469 * This should never happen.
470 */
471 if (slot >= 8)
472 return 0;
473
474 mask = channel_allocations[ordered_ca].speakers[7 - slot];
475
476 return snd_hdac_spk_to_chmap(mask);
477}
478
479/* get the CA index corresponding to the given ALSA API channel map */
480static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
481{
482 int i, spks = 0, spk_mask = 0;
483
484 for (i = 0; i < chs; i++) {
485 int mask = snd_hdac_chmap_to_spk_mask(map[i]);
486
487 if (mask) {
488 spk_mask |= mask;
489 spks++;
490 }
491 }
492
493 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
494 if ((chs == channel_allocations[i].channels ||
495 spks == channel_allocations[i].channels) &&
496 (spk_mask & channel_allocations[i].spk_mask) ==
497 channel_allocations[i].spk_mask)
498 return channel_allocations[i].ca_index;
499 }
500 return -1;
501}
502
503/* set up the channel slots for the given ALSA API channel map */
504static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap,
505 hda_nid_t pin_nid,
506 int chs, unsigned char *map,
507 int ca)
508{
509 int ordered_ca = get_channel_allocation_order(ca);
510 int alsa_pos, hdmi_slot;
511 int assignments[8] = {[0 ... 7] = 0xf};
512
513 for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
514
515 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);
516
517 if (hdmi_slot < 0)
518 continue; /* unassigned channel */
519
520 assignments[hdmi_slot] = alsa_pos;
521 }
522
523 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
524 int err;
525
526 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
527 pin_nid, hdmi_slot, assignments[hdmi_slot]);
528 if (err)
529 return -EINVAL;
530 }
531 return 0;
532}
533
534/* store ALSA API channel map from the current default map */
535static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
536{
537 int i;
538 int ordered_ca = get_channel_allocation_order(ca);
539
540 for (i = 0; i < 8; i++) {
541 if (ordered_ca < ARRAY_SIZE(channel_allocations) &&
542 i < channel_allocations[ordered_ca].channels)
543 map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f);
544 else
545 map[i] = 0;
546 }
547}
548
549void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
550 hda_nid_t pin_nid, bool non_pcm, int ca,
551 int channels, unsigned char *map,
552 bool chmap_set)
553{
554 if (!non_pcm && chmap_set) {
555 hdmi_manual_setup_channel_mapping(chmap, pin_nid,
556 channels, map, ca);
557 } else {
558 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca);
559 hdmi_setup_fake_chmap(map, ca);
560 }
561
562 hdmi_debug_channel_mapping(chmap, pin_nid);
563}
564EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
565
566int snd_hdac_get_active_channels(int ca)
567{
568 int ordered_ca = get_channel_allocation_order(ca);
569
570 /* Add sanity check to pass klockwork check.
571 * This should never happen.
572 */
573 if (ordered_ca >= ARRAY_SIZE(channel_allocations))
574 ordered_ca = 0;
575
576 return channel_allocations[ordered_ca].channels;
577}
578EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
579
580struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca)
581{
582 return &channel_allocations[get_channel_allocation_order(ca)];
583}
584EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
585
586int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
587 int channels, bool chmap_set, bool non_pcm, unsigned char *map)
588{
589 int ca;
590
591 if (!non_pcm && chmap_set)
592 ca = hdmi_manual_channel_allocation(channels, map);
593 else
594 ca = hdmi_channel_allocation_spk_alloc_blk(hdac,
595 spk_alloc, channels);
596
597 if (ca < 0)
598 ca = 0;
599
600 return ca;
601}
602EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
603
604/*
605 * ALSA API channel-map control callbacks
606 */
607static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
608 struct snd_ctl_elem_info *uinfo)
609{
610 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
611 struct hdac_chmap *chmap = info->private_data;
612
613 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
614 uinfo->count = chmap->channels_max;
615 uinfo->value.integer.min = 0;
616 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
617 return 0;
618}
619
620static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap,
621 struct hdac_cea_channel_speaker_allocation *cap, int channels)
622{
623 /* If the speaker allocation matches the channel count, it is OK.*/
624 if (cap->channels != channels)
625 return -1;
626
627 /* all channels are remappable freely */
628 return SNDRV_CTL_TLVT_CHMAP_VAR;
629}
630
631static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap,
632 struct hdac_cea_channel_speaker_allocation *cap,
633 unsigned int *chmap, int channels)
634{
635 int count = 0;
636 int c;
637
638 for (c = 7; c >= 0; c--) {
639 int spk = cap->speakers[c];
640
641 if (!spk)
642 continue;
643
644 chmap[count++] = snd_hdac_spk_to_chmap(spk);
645 }
646
647 WARN_ON(count != channels);
648}
649
650static int spk_mask_from_spk_alloc(int spk_alloc)
651{
652 int i;
653 int spk_mask = eld_speaker_allocation_bits[0];
654
655 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
656 if (spk_alloc & (1 << i))
657 spk_mask |= eld_speaker_allocation_bits[i];
658 }
659
660 return spk_mask;
661}
662
663static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
664 unsigned int size, unsigned int __user *tlv)
665{
666 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
667 struct hdac_chmap *chmap = info->private_data;
668 int pcm_idx = kcontrol->private_value;
669 unsigned int __user *dst;
670 int chs, count = 0;
671 unsigned long max_chs;
672 int type;
673 int spk_alloc, spk_mask;
674
675 if (size < 8)
676 return -ENOMEM;
677 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
678 return -EFAULT;
679 size -= 8;
680 dst = tlv + 2;
681
682 spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx);
683 spk_mask = spk_mask_from_spk_alloc(spk_alloc);
684
685 max_chs = hweight_long(spk_mask);
686
687 for (chs = 2; chs <= max_chs; chs++) {
688 int i;
689 struct hdac_cea_channel_speaker_allocation *cap;
690
691 cap = channel_allocations;
692 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
693 int chs_bytes = chs * 4;
694 unsigned int tlv_chmap[8];
695
696 if (cap->channels != chs)
697 continue;
698
699 if (!(cap->spk_mask == (spk_mask & cap->spk_mask)))
700 continue;
701
702 type = chmap->ops.chmap_cea_alloc_validate_get_type(
703 chmap, cap, chs);
704 if (type < 0)
705 return -ENODEV;
706 if (size < 8)
707 return -ENOMEM;
708
709 if (put_user(type, dst) ||
710 put_user(chs_bytes, dst + 1))
711 return -EFAULT;
712
713 dst += 2;
714 size -= 8;
715 count += 8;
716
717 if (size < chs_bytes)
718 return -ENOMEM;
719
720 size -= chs_bytes;
721 count += chs_bytes;
722 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
723 tlv_chmap, chs);
724
725 if (copy_to_user(dst, tlv_chmap, chs_bytes))
726 return -EFAULT;
727 dst += chs;
728 }
729 }
730
731 if (put_user(count, tlv + 1))
732 return -EFAULT;
733
734 return 0;
735}
736
737static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
738 struct snd_ctl_elem_value *ucontrol)
739{
740 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
741 struct hdac_chmap *chmap = info->private_data;
742 int pcm_idx = kcontrol->private_value;
743 unsigned char pcm_chmap[8];
744 int i;
745
746 memset(pcm_chmap, 0, sizeof(pcm_chmap));
747 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap);
748
749 for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++)
750 ucontrol->value.integer.value[i] = pcm_chmap[i];
751
752 return 0;
753}
754
755static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
756 struct snd_ctl_elem_value *ucontrol)
757{
758 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
759 struct hdac_chmap *hchmap = info->private_data;
760 int pcm_idx = kcontrol->private_value;
761 unsigned int ctl_idx;
762 struct snd_pcm_substream *substream;
763 unsigned char chmap[8], per_pin_chmap[8];
764 int i, err, ca, prepared = 0;
765
766 /* No monitor is connected in dyn_pcm_assign.
767 * It's invalid to setup the chmap
768 */
769 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
770 return 0;
771
772 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
773 substream = snd_pcm_chmap_substream(info, ctl_idx);
774 if (!substream || !substream->runtime)
775 return 0; /* just for avoiding error from alsactl restore */
776 switch (substream->runtime->status->state) {
777 case SNDRV_PCM_STATE_OPEN:
778 case SNDRV_PCM_STATE_SETUP:
779 break;
780 case SNDRV_PCM_STATE_PREPARED:
781 prepared = 1;
782 break;
783 default:
784 return -EBUSY;
785 }
786 memset(chmap, 0, sizeof(chmap));
787 for (i = 0; i < ARRAY_SIZE(chmap); i++)
788 chmap[i] = ucontrol->value.integer.value[i];
789
790 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
791 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
792 return 0;
793 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
794 if (ca < 0)
795 return -EINVAL;
796 if (hchmap->ops.chmap_validate) {
797 err = hchmap->ops.chmap_validate(hchmap, ca,
798 ARRAY_SIZE(chmap), chmap);
799 if (err)
800 return err;
801 }
802
803 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
804
805 return 0;
806}
807
808static const struct hdac_chmap_ops chmap_ops = {
809 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type,
810 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap,
811 .pin_get_slot_channel = hdmi_pin_get_slot_channel,
812 .pin_set_slot_channel = hdmi_pin_set_slot_channel,
813 .set_channel_count = hdmi_set_channel_count,
814};
815
816void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
817 struct hdac_chmap *chmap)
818{
819 chmap->ops = chmap_ops;
820 chmap->hdac = hdac;
821 init_channel_allocations();
822}
823EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
824
825int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
826 struct hdac_chmap *hchmap)
827{
828 struct snd_pcm_chmap *chmap;
829 struct snd_kcontrol *kctl;
830 int err, i;
831
832 err = snd_pcm_add_chmap_ctls(pcm,
833 SNDRV_PCM_STREAM_PLAYBACK,
834 NULL, 0, pcm_idx, &chmap);
835 if (err < 0)
836 return err;
837 /* override handlers */
838 chmap->private_data = hchmap;
839 kctl = chmap->kctl;
840 for (i = 0; i < kctl->count; i++)
841 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
842 kctl->info = hdmi_chmap_ctl_info;
843 kctl->get = hdmi_chmap_ctl_get;
844 kctl->put = hdmi_chmap_ctl_put;
845 kctl->tlv.c = hdmi_chmap_ctl_tlv;
846
847 return 0;
848}
849EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HDMI Channel map support helpers
4 */
5
6#include <linux/module.h>
7#include <sound/control.h>
8#include <sound/tlv.h>
9#include <sound/hda_chmap.h>
10
11/*
12 * CEA speaker placement:
13 *
14 * FLH FCH FRH
15 * FLW FL FLC FC FRC FR FRW
16 *
17 * LFE
18 * TC
19 *
20 * RL RLC RC RRC RR
21 *
22 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
23 * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
24 */
25enum cea_speaker_placement {
26 FL = (1 << 0), /* Front Left */
27 FC = (1 << 1), /* Front Center */
28 FR = (1 << 2), /* Front Right */
29 FLC = (1 << 3), /* Front Left Center */
30 FRC = (1 << 4), /* Front Right Center */
31 RL = (1 << 5), /* Rear Left */
32 RC = (1 << 6), /* Rear Center */
33 RR = (1 << 7), /* Rear Right */
34 RLC = (1 << 8), /* Rear Left Center */
35 RRC = (1 << 9), /* Rear Right Center */
36 LFE = (1 << 10), /* Low Frequency Effect */
37 FLW = (1 << 11), /* Front Left Wide */
38 FRW = (1 << 12), /* Front Right Wide */
39 FLH = (1 << 13), /* Front Left High */
40 FCH = (1 << 14), /* Front Center High */
41 FRH = (1 << 15), /* Front Right High */
42 TC = (1 << 16), /* Top Center */
43};
44
45static const char * const cea_speaker_allocation_names[] = {
46 /* 0 */ "FL/FR",
47 /* 1 */ "LFE",
48 /* 2 */ "FC",
49 /* 3 */ "RL/RR",
50 /* 4 */ "RC",
51 /* 5 */ "FLC/FRC",
52 /* 6 */ "RLC/RRC",
53 /* 7 */ "FLW/FRW",
54 /* 8 */ "FLH/FRH",
55 /* 9 */ "TC",
56 /* 10 */ "FCH",
57};
58
59/*
60 * ELD SA bits in the CEA Speaker Allocation data block
61 */
62static const int eld_speaker_allocation_bits[] = {
63 [0] = FL | FR,
64 [1] = LFE,
65 [2] = FC,
66 [3] = RL | RR,
67 [4] = RC,
68 [5] = FLC | FRC,
69 [6] = RLC | RRC,
70 /* the following are not defined in ELD yet */
71 [7] = FLW | FRW,
72 [8] = FLH | FRH,
73 [9] = TC,
74 [10] = FCH,
75};
76
77/*
78 * ALSA sequence is:
79 *
80 * surround40 surround41 surround50 surround51 surround71
81 * ch0 front left = = = =
82 * ch1 front right = = = =
83 * ch2 rear left = = = =
84 * ch3 rear right = = = =
85 * ch4 LFE center center center
86 * ch5 LFE LFE
87 * ch6 side left
88 * ch7 side right
89 *
90 * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR}
91 */
92static int hdmi_channel_mapping[0x32][8] = {
93 /* stereo */
94 [0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
95 /* 2.1 */
96 [0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
97 /* Dolby Surround */
98 [0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 },
99 /* surround40 */
100 [0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 },
101 /* 4ch */
102 [0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 },
103 /* surround41 */
104 [0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 },
105 /* surround50 */
106 [0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 },
107 /* surround51 */
108 [0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 },
109 /* 7.1 */
110 [0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 },
111};
112
113/*
114 * This is an ordered list!
115 *
116 * The preceding ones have better chances to be selected by
117 * hdmi_channel_allocation().
118 */
119static struct hdac_cea_channel_speaker_allocation channel_allocations[] = {
120/* channel: 7 6 5 4 3 2 1 0 */
121{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } },
122 /* 2.1 */
123{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } },
124 /* Dolby Surround */
125{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } },
126 /* surround40 */
127{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
128 /* surround41 */
129{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
130 /* surround50 */
131{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
132 /* surround51 */
133{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
134 /* 6.1 */
135{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
136 /* surround71 */
137{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
138
139{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } },
140{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } },
141{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } },
142{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } },
143{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } },
144{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } },
145{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } },
146{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } },
147{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } },
148{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } },
149{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } },
150{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } },
151{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } },
152{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } },
153{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } },
154{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } },
155{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } },
156{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } },
157{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } },
158{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } },
159{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } },
160{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } },
161{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } },
162{ .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } },
163{ .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } },
164{ .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } },
165{ .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } },
166{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } },
167{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } },
168{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } },
169{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } },
170{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } },
171{ .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } },
172{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } },
173{ .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } },
174{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } },
175{ .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } },
176{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } },
177{ .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } },
178{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } },
179{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
180};
181
182static int hdmi_pin_set_slot_channel(struct hdac_device *codec,
183 hda_nid_t pin_nid, int asp_slot, int channel)
184{
185 return snd_hdac_codec_write(codec, pin_nid, 0,
186 AC_VERB_SET_HDMI_CHAN_SLOT,
187 (channel << 4) | asp_slot);
188}
189
190static int hdmi_pin_get_slot_channel(struct hdac_device *codec,
191 hda_nid_t pin_nid, int asp_slot)
192{
193 return (snd_hdac_codec_read(codec, pin_nid, 0,
194 AC_VERB_GET_HDMI_CHAN_SLOT,
195 asp_slot) & 0xf0) >> 4;
196}
197
198static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid)
199{
200 return 1 + snd_hdac_codec_read(codec, cvt_nid, 0,
201 AC_VERB_GET_CVT_CHAN_COUNT, 0);
202}
203
204static void hdmi_set_channel_count(struct hdac_device *codec,
205 hda_nid_t cvt_nid, int chs)
206{
207 if (chs != hdmi_get_channel_count(codec, cvt_nid))
208 snd_hdac_codec_write(codec, cvt_nid, 0,
209 AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
210}
211
212/*
213 * Channel mapping routines
214 */
215
216/*
217 * Compute derived values in channel_allocations[].
218 */
219static void init_channel_allocations(void)
220{
221 int i, j;
222 struct hdac_cea_channel_speaker_allocation *p;
223
224 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
225 p = channel_allocations + i;
226 p->channels = 0;
227 p->spk_mask = 0;
228 for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
229 if (p->speakers[j]) {
230 p->channels++;
231 p->spk_mask |= p->speakers[j];
232 }
233 }
234}
235
236static int get_channel_allocation_order(int ca)
237{
238 int i;
239
240 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
241 if (channel_allocations[i].ca_index == ca)
242 break;
243 }
244 return i;
245}
246
247void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen)
248{
249 int i, j;
250
251 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
252 if (spk_alloc & (1 << i))
253 j += scnprintf(buf + j, buflen - j, " %s",
254 cea_speaker_allocation_names[i]);
255 }
256 buf[j] = '\0'; /* necessary when j == 0 */
257}
258EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation);
259
260/*
261 * The transformation takes two steps:
262 *
263 * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
264 * spk_mask => (channel_allocations[]) => ai->CA
265 *
266 * TODO: it could select the wrong CA from multiple candidates.
267*/
268static int hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec,
269 int spk_alloc, int channels)
270{
271 int i;
272 int ca = 0;
273 int spk_mask = 0;
274 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
275
276 /*
277 * CA defaults to 0 for basic stereo audio
278 */
279 if (channels <= 2)
280 return 0;
281
282 /*
283 * expand ELD's speaker allocation mask
284 *
285 * ELD tells the speaker mask in a compact(paired) form,
286 * expand ELD's notions to match the ones used by Audio InfoFrame.
287 */
288 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
289 if (spk_alloc & (1 << i))
290 spk_mask |= eld_speaker_allocation_bits[i];
291 }
292
293 /* search for the first working match in the CA table */
294 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
295 if (channels == channel_allocations[i].channels &&
296 (spk_mask & channel_allocations[i].spk_mask) ==
297 channel_allocations[i].spk_mask) {
298 ca = channel_allocations[i].ca_index;
299 break;
300 }
301 }
302
303 if (!ca) {
304 /*
305 * if there was no match, select the regular ALSA channel
306 * allocation with the matching number of channels
307 */
308 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
309 if (channels == channel_allocations[i].channels) {
310 ca = channel_allocations[i].ca_index;
311 break;
312 }
313 }
314 }
315
316 snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf));
317 dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n",
318 ca, channels, buf);
319
320 return ca;
321}
322
323static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap,
324 hda_nid_t pin_nid)
325{
326#ifdef CONFIG_SND_DEBUG_VERBOSE
327 int i;
328 int channel;
329
330 for (i = 0; i < 8; i++) {
331 channel = chmap->ops.pin_get_slot_channel(
332 chmap->hdac, pin_nid, i);
333 dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n",
334 channel, i);
335 }
336#endif
337}
338
339static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap,
340 hda_nid_t pin_nid,
341 bool non_pcm,
342 int ca)
343{
344 struct hdac_cea_channel_speaker_allocation *ch_alloc;
345 int i;
346 int err;
347 int order;
348 int non_pcm_mapping[8];
349
350 order = get_channel_allocation_order(ca);
351 ch_alloc = &channel_allocations[order];
352
353 if (hdmi_channel_mapping[ca][1] == 0) {
354 int hdmi_slot = 0;
355 /* fill actual channel mappings in ALSA channel (i) order */
356 for (i = 0; i < ch_alloc->channels; i++) {
357 while (!WARN_ON(hdmi_slot >= 8) &&
358 !ch_alloc->speakers[7 - hdmi_slot])
359 hdmi_slot++; /* skip zero slots */
360
361 hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
362 }
363 /* fill the rest of the slots with ALSA channel 0xf */
364 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
365 if (!ch_alloc->speakers[7 - hdmi_slot])
366 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
367 }
368
369 if (non_pcm) {
370 for (i = 0; i < ch_alloc->channels; i++)
371 non_pcm_mapping[i] = (i << 4) | i;
372 for (; i < 8; i++)
373 non_pcm_mapping[i] = (0xf << 4) | i;
374 }
375
376 for (i = 0; i < 8; i++) {
377 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i];
378 int hdmi_slot = slotsetup & 0x0f;
379 int channel = (slotsetup & 0xf0) >> 4;
380
381 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
382 pin_nid, hdmi_slot, channel);
383 if (err) {
384 dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n");
385 break;
386 }
387 }
388}
389
390struct channel_map_table {
391 unsigned char map; /* ALSA API channel map position */
392 int spk_mask; /* speaker position bit mask */
393};
394
395static struct channel_map_table map_tables[] = {
396 { SNDRV_CHMAP_FL, FL },
397 { SNDRV_CHMAP_FR, FR },
398 { SNDRV_CHMAP_RL, RL },
399 { SNDRV_CHMAP_RR, RR },
400 { SNDRV_CHMAP_LFE, LFE },
401 { SNDRV_CHMAP_FC, FC },
402 { SNDRV_CHMAP_RLC, RLC },
403 { SNDRV_CHMAP_RRC, RRC },
404 { SNDRV_CHMAP_RC, RC },
405 { SNDRV_CHMAP_FLC, FLC },
406 { SNDRV_CHMAP_FRC, FRC },
407 { SNDRV_CHMAP_TFL, FLH },
408 { SNDRV_CHMAP_TFR, FRH },
409 { SNDRV_CHMAP_FLW, FLW },
410 { SNDRV_CHMAP_FRW, FRW },
411 { SNDRV_CHMAP_TC, TC },
412 { SNDRV_CHMAP_TFC, FCH },
413 {} /* terminator */
414};
415
416/* from ALSA API channel position to speaker bit mask */
417int snd_hdac_chmap_to_spk_mask(unsigned char c)
418{
419 struct channel_map_table *t = map_tables;
420
421 for (; t->map; t++) {
422 if (t->map == c)
423 return t->spk_mask;
424 }
425 return 0;
426}
427EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
428
429/* from ALSA API channel position to CEA slot */
430static int to_cea_slot(int ordered_ca, unsigned char pos)
431{
432 int mask = snd_hdac_chmap_to_spk_mask(pos);
433 int i;
434
435 /* Add sanity check to pass klockwork check.
436 * This should never happen.
437 */
438 if (ordered_ca >= ARRAY_SIZE(channel_allocations))
439 return -1;
440
441 if (mask) {
442 for (i = 0; i < 8; i++) {
443 if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
444 return i;
445 }
446 }
447
448 return -1;
449}
450
451/* from speaker bit mask to ALSA API channel position */
452int snd_hdac_spk_to_chmap(int spk)
453{
454 struct channel_map_table *t = map_tables;
455
456 for (; t->map; t++) {
457 if (t->spk_mask == spk)
458 return t->map;
459 }
460 return 0;
461}
462EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
463
464/* from CEA slot to ALSA API channel position */
465static int from_cea_slot(int ordered_ca, unsigned char slot)
466{
467 int mask;
468
469 /* Add sanity check to pass klockwork check.
470 * This should never happen.
471 */
472 if (slot >= 8)
473 return 0;
474
475 mask = channel_allocations[ordered_ca].speakers[7 - slot];
476
477 return snd_hdac_spk_to_chmap(mask);
478}
479
480/* get the CA index corresponding to the given ALSA API channel map */
481static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
482{
483 int i, spks = 0, spk_mask = 0;
484
485 for (i = 0; i < chs; i++) {
486 int mask = snd_hdac_chmap_to_spk_mask(map[i]);
487
488 if (mask) {
489 spk_mask |= mask;
490 spks++;
491 }
492 }
493
494 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
495 if ((chs == channel_allocations[i].channels ||
496 spks == channel_allocations[i].channels) &&
497 (spk_mask & channel_allocations[i].spk_mask) ==
498 channel_allocations[i].spk_mask)
499 return channel_allocations[i].ca_index;
500 }
501 return -1;
502}
503
504/* set up the channel slots for the given ALSA API channel map */
505static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap,
506 hda_nid_t pin_nid,
507 int chs, unsigned char *map,
508 int ca)
509{
510 int ordered_ca = get_channel_allocation_order(ca);
511 int alsa_pos, hdmi_slot;
512 int assignments[8] = {[0 ... 7] = 0xf};
513
514 for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
515
516 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);
517
518 if (hdmi_slot < 0)
519 continue; /* unassigned channel */
520
521 assignments[hdmi_slot] = alsa_pos;
522 }
523
524 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
525 int err;
526
527 err = chmap->ops.pin_set_slot_channel(chmap->hdac,
528 pin_nid, hdmi_slot, assignments[hdmi_slot]);
529 if (err)
530 return -EINVAL;
531 }
532 return 0;
533}
534
535/* store ALSA API channel map from the current default map */
536static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
537{
538 int i;
539 int ordered_ca = get_channel_allocation_order(ca);
540
541 for (i = 0; i < 8; i++) {
542 if (ordered_ca < ARRAY_SIZE(channel_allocations) &&
543 i < channel_allocations[ordered_ca].channels)
544 map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f);
545 else
546 map[i] = 0;
547 }
548}
549
550void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap,
551 hda_nid_t pin_nid, bool non_pcm, int ca,
552 int channels, unsigned char *map,
553 bool chmap_set)
554{
555 if (!non_pcm && chmap_set) {
556 hdmi_manual_setup_channel_mapping(chmap, pin_nid,
557 channels, map, ca);
558 } else {
559 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca);
560 hdmi_setup_fake_chmap(map, ca);
561 }
562
563 hdmi_debug_channel_mapping(chmap, pin_nid);
564}
565EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
566
567int snd_hdac_get_active_channels(int ca)
568{
569 int ordered_ca = get_channel_allocation_order(ca);
570
571 /* Add sanity check to pass klockwork check.
572 * This should never happen.
573 */
574 if (ordered_ca >= ARRAY_SIZE(channel_allocations))
575 ordered_ca = 0;
576
577 return channel_allocations[ordered_ca].channels;
578}
579EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
580
581struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca)
582{
583 return &channel_allocations[get_channel_allocation_order(ca)];
584}
585EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
586
587int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc,
588 int channels, bool chmap_set, bool non_pcm, unsigned char *map)
589{
590 int ca;
591
592 if (!non_pcm && chmap_set)
593 ca = hdmi_manual_channel_allocation(channels, map);
594 else
595 ca = hdmi_channel_allocation_spk_alloc_blk(hdac,
596 spk_alloc, channels);
597
598 if (ca < 0)
599 ca = 0;
600
601 return ca;
602}
603EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
604
605/*
606 * ALSA API channel-map control callbacks
607 */
608static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
609 struct snd_ctl_elem_info *uinfo)
610{
611 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
612 struct hdac_chmap *chmap = info->private_data;
613
614 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
615 uinfo->count = chmap->channels_max;
616 uinfo->value.integer.min = 0;
617 uinfo->value.integer.max = SNDRV_CHMAP_LAST;
618 return 0;
619}
620
621static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap,
622 struct hdac_cea_channel_speaker_allocation *cap, int channels)
623{
624 /* If the speaker allocation matches the channel count, it is OK.*/
625 if (cap->channels != channels)
626 return -1;
627
628 /* all channels are remappable freely */
629 return SNDRV_CTL_TLVT_CHMAP_VAR;
630}
631
632static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap,
633 struct hdac_cea_channel_speaker_allocation *cap,
634 unsigned int *chmap, int channels)
635{
636 int count = 0;
637 int c;
638
639 for (c = 7; c >= 0; c--) {
640 int spk = cap->speakers[c];
641
642 if (!spk)
643 continue;
644
645 chmap[count++] = snd_hdac_spk_to_chmap(spk);
646 }
647
648 WARN_ON(count != channels);
649}
650
651static int spk_mask_from_spk_alloc(int spk_alloc)
652{
653 int i;
654 int spk_mask = eld_speaker_allocation_bits[0];
655
656 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
657 if (spk_alloc & (1 << i))
658 spk_mask |= eld_speaker_allocation_bits[i];
659 }
660
661 return spk_mask;
662}
663
664static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
665 unsigned int size, unsigned int __user *tlv)
666{
667 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
668 struct hdac_chmap *chmap = info->private_data;
669 int pcm_idx = kcontrol->private_value;
670 unsigned int __user *dst;
671 int chs, count = 0;
672 unsigned long max_chs;
673 int type;
674 int spk_alloc, spk_mask;
675
676 if (size < 8)
677 return -ENOMEM;
678 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
679 return -EFAULT;
680 size -= 8;
681 dst = tlv + 2;
682
683 spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx);
684 spk_mask = spk_mask_from_spk_alloc(spk_alloc);
685
686 max_chs = hweight_long(spk_mask);
687
688 for (chs = 2; chs <= max_chs; chs++) {
689 int i;
690 struct hdac_cea_channel_speaker_allocation *cap;
691
692 cap = channel_allocations;
693 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
694 int chs_bytes = chs * 4;
695 unsigned int tlv_chmap[8];
696
697 if (cap->channels != chs)
698 continue;
699
700 if (!(cap->spk_mask == (spk_mask & cap->spk_mask)))
701 continue;
702
703 type = chmap->ops.chmap_cea_alloc_validate_get_type(
704 chmap, cap, chs);
705 if (type < 0)
706 return -ENODEV;
707 if (size < 8)
708 return -ENOMEM;
709
710 if (put_user(type, dst) ||
711 put_user(chs_bytes, dst + 1))
712 return -EFAULT;
713
714 dst += 2;
715 size -= 8;
716 count += 8;
717
718 if (size < chs_bytes)
719 return -ENOMEM;
720
721 size -= chs_bytes;
722 count += chs_bytes;
723 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
724 tlv_chmap, chs);
725
726 if (copy_to_user(dst, tlv_chmap, chs_bytes))
727 return -EFAULT;
728 dst += chs;
729 }
730 }
731
732 if (put_user(count, tlv + 1))
733 return -EFAULT;
734
735 return 0;
736}
737
738static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
739 struct snd_ctl_elem_value *ucontrol)
740{
741 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
742 struct hdac_chmap *chmap = info->private_data;
743 int pcm_idx = kcontrol->private_value;
744 unsigned char pcm_chmap[8];
745 int i;
746
747 memset(pcm_chmap, 0, sizeof(pcm_chmap));
748 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap);
749
750 for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++)
751 ucontrol->value.integer.value[i] = pcm_chmap[i];
752
753 return 0;
754}
755
756static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
757 struct snd_ctl_elem_value *ucontrol)
758{
759 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
760 struct hdac_chmap *hchmap = info->private_data;
761 int pcm_idx = kcontrol->private_value;
762 unsigned int ctl_idx;
763 struct snd_pcm_substream *substream;
764 unsigned char chmap[8], per_pin_chmap[8];
765 int i, err, ca, prepared = 0;
766
767 /* No monitor is connected in dyn_pcm_assign.
768 * It's invalid to setup the chmap
769 */
770 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
771 return 0;
772
773 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
774 substream = snd_pcm_chmap_substream(info, ctl_idx);
775 if (!substream || !substream->runtime)
776 return 0; /* just for avoiding error from alsactl restore */
777 switch (substream->runtime->state) {
778 case SNDRV_PCM_STATE_OPEN:
779 case SNDRV_PCM_STATE_SETUP:
780 break;
781 case SNDRV_PCM_STATE_PREPARED:
782 prepared = 1;
783 break;
784 default:
785 return -EBUSY;
786 }
787 memset(chmap, 0, sizeof(chmap));
788 for (i = 0; i < ARRAY_SIZE(chmap); i++)
789 chmap[i] = ucontrol->value.integer.value[i];
790
791 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
792 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
793 return 0;
794 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
795 if (ca < 0)
796 return -EINVAL;
797 if (hchmap->ops.chmap_validate) {
798 err = hchmap->ops.chmap_validate(hchmap, ca,
799 ARRAY_SIZE(chmap), chmap);
800 if (err)
801 return err;
802 }
803
804 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
805
806 return 0;
807}
808
809static const struct hdac_chmap_ops chmap_ops = {
810 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type,
811 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap,
812 .pin_get_slot_channel = hdmi_pin_get_slot_channel,
813 .pin_set_slot_channel = hdmi_pin_set_slot_channel,
814 .set_channel_count = hdmi_set_channel_count,
815};
816
817void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
818 struct hdac_chmap *chmap)
819{
820 chmap->ops = chmap_ops;
821 chmap->hdac = hdac;
822 init_channel_allocations();
823}
824EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
825
826int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
827 struct hdac_chmap *hchmap)
828{
829 struct snd_pcm_chmap *chmap;
830 struct snd_kcontrol *kctl;
831 int err, i;
832
833 err = snd_pcm_add_chmap_ctls(pcm,
834 SNDRV_PCM_STREAM_PLAYBACK,
835 NULL, 0, pcm_idx, &chmap);
836 if (err < 0)
837 return err;
838 /* override handlers */
839 chmap->private_data = hchmap;
840 kctl = chmap->kctl;
841 for (i = 0; i < kctl->count; i++)
842 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
843 kctl->info = hdmi_chmap_ctl_info;
844 kctl->get = hdmi_chmap_ctl_get;
845 kctl->put = hdmi_chmap_ctl_put;
846 kctl->tlv.c = hdmi_chmap_ctl_tlv;
847
848 return 0;
849}
850EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);