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 */
25 enum 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
45 static 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 */
62 static 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 */
92 static 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 */
119 static 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
182 static 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
190 static 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
198 static 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
204 static 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 */
219 static 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
236 static 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
247 void 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 }
258 EXPORT_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 */
268 static 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
323 static 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
339 static 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
390 struct channel_map_table {
391 unsigned char map; /* ALSA API channel map position */
392 int spk_mask; /* speaker position bit mask */
393 };
394
395 static 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 */
417 int 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 }
427 EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask);
428
429 /* from ALSA API channel position to CEA slot */
430 static 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 */
452 int 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 }
462 EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap);
463
464 /* from CEA slot to ALSA API channel position */
465 static 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 */
481 static 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 */
505 static 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 */
536 static 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
550 void 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 }
565 EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping);
566
567 int 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 }
579 EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels);
580
581 struct 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 }
585 EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca);
586
587 int 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 }
603 EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation);
604
605 /*
606 * ALSA API channel-map control callbacks
607 */
608 static 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
621 static 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
632 static 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
651 static 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
664 static 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
738 static 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
756 /* a simple sanity check for input values to chmap kcontrol */
757 static int chmap_value_check(struct hdac_chmap *hchmap,
758 const struct snd_ctl_elem_value *ucontrol)
759 {
760 int i;
761
762 for (i = 0; i < hchmap->channels_max; i++) {
763 if (ucontrol->value.integer.value[i] < 0 ||
764 ucontrol->value.integer.value[i] > SNDRV_CHMAP_LAST)
765 return -EINVAL;
766 }
767 return 0;
768 }
769
770 static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
771 struct snd_ctl_elem_value *ucontrol)
772 {
773 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
774 struct hdac_chmap *hchmap = info->private_data;
775 int pcm_idx = kcontrol->private_value;
776 unsigned int ctl_idx;
777 struct snd_pcm_substream *substream;
778 unsigned char chmap[8], per_pin_chmap[8];
779 int i, err, ca, prepared = 0;
780
781 err = chmap_value_check(hchmap, ucontrol);
782 if (err < 0)
783 return err;
784
785 /* No monitor is connected in dyn_pcm_assign.
786 * It's invalid to setup the chmap
787 */
788 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx))
789 return 0;
790
791 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
792 substream = snd_pcm_chmap_substream(info, ctl_idx);
793 if (!substream || !substream->runtime)
794 return 0; /* just for avoiding error from alsactl restore */
795 switch (substream->runtime->state) {
796 case SNDRV_PCM_STATE_OPEN:
797 case SNDRV_PCM_STATE_SETUP:
798 break;
799 case SNDRV_PCM_STATE_PREPARED:
800 prepared = 1;
801 break;
802 default:
803 return -EBUSY;
804 }
805 memset(chmap, 0, sizeof(chmap));
806 for (i = 0; i < ARRAY_SIZE(chmap); i++)
807 chmap[i] = ucontrol->value.integer.value[i];
808
809 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
810 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
811 return 0;
812 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
813 if (ca < 0)
814 return -EINVAL;
815 if (hchmap->ops.chmap_validate) {
816 err = hchmap->ops.chmap_validate(hchmap, ca,
817 ARRAY_SIZE(chmap), chmap);
818 if (err)
819 return err;
820 }
821
822 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
823
824 return 0;
825 }
826
827 static const struct hdac_chmap_ops chmap_ops = {
828 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type,
829 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap,
830 .pin_get_slot_channel = hdmi_pin_get_slot_channel,
831 .pin_set_slot_channel = hdmi_pin_set_slot_channel,
832 .set_channel_count = hdmi_set_channel_count,
833 };
834
835 void snd_hdac_register_chmap_ops(struct hdac_device *hdac,
836 struct hdac_chmap *chmap)
837 {
838 chmap->ops = chmap_ops;
839 chmap->hdac = hdac;
840 init_channel_allocations();
841 }
842 EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops);
843
844 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
845 struct hdac_chmap *hchmap)
846 {
847 struct snd_pcm_chmap *chmap;
848 struct snd_kcontrol *kctl;
849 int err, i;
850
851 err = snd_pcm_add_chmap_ctls(pcm,
852 SNDRV_PCM_STREAM_PLAYBACK,
853 NULL, 0, pcm_idx, &chmap);
854 if (err < 0)
855 return err;
856 /* override handlers */
857 chmap->private_data = hchmap;
858 kctl = chmap->kctl;
859 for (i = 0; i < kctl->count; i++)
860 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
861 kctl->info = hdmi_chmap_ctl_info;
862 kctl->get = hdmi_chmap_ctl_get;
863 kctl->put = hdmi_chmap_ctl_put;
864 kctl->tlv.c = hdmi_chmap_ctl_tlv;
865
866 return 0;
867 }
868 EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);
869
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