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Merge branch 'topic/hdac' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
[deliverable/linux.git] / sound / soc / soc-pcm.c
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include <linux/export.h>
27 #include <linux/debugfs.h>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/soc-dpcm.h>
33 #include <sound/initval.h>
34
35 #define DPCM_MAX_BE_USERS 8
36
37 /*
38 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
39 *
40 * Returns true if the DAI supports the indicated stream type.
41 */
42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
43 {
44 struct snd_soc_pcm_stream *codec_stream;
45
46 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
47 codec_stream = &dai->driver->playback;
48 else
49 codec_stream = &dai->driver->capture;
50
51 /* If the codec specifies any rate at all, it supports the stream. */
52 return codec_stream->rates;
53 }
54
55 /**
56 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
57 * @rtd: ASoC PCM runtime that is activated
58 * @stream: Direction of the PCM stream
59 *
60 * Increments the active count for all the DAIs and components attached to a PCM
61 * runtime. Should typically be called when a stream is opened.
62 *
63 * Must be called with the rtd->pcm_mutex being held
64 */
65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
66 {
67 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
68 int i;
69
70 lockdep_assert_held(&rtd->pcm_mutex);
71
72 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
73 cpu_dai->playback_active++;
74 for (i = 0; i < rtd->num_codecs; i++)
75 rtd->codec_dais[i]->playback_active++;
76 } else {
77 cpu_dai->capture_active++;
78 for (i = 0; i < rtd->num_codecs; i++)
79 rtd->codec_dais[i]->capture_active++;
80 }
81
82 cpu_dai->active++;
83 cpu_dai->component->active++;
84 for (i = 0; i < rtd->num_codecs; i++) {
85 rtd->codec_dais[i]->active++;
86 rtd->codec_dais[i]->component->active++;
87 }
88 }
89
90 /**
91 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
92 * @rtd: ASoC PCM runtime that is deactivated
93 * @stream: Direction of the PCM stream
94 *
95 * Decrements the active count for all the DAIs and components attached to a PCM
96 * runtime. Should typically be called when a stream is closed.
97 *
98 * Must be called with the rtd->pcm_mutex being held
99 */
100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
101 {
102 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
103 int i;
104
105 lockdep_assert_held(&rtd->pcm_mutex);
106
107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
108 cpu_dai->playback_active--;
109 for (i = 0; i < rtd->num_codecs; i++)
110 rtd->codec_dais[i]->playback_active--;
111 } else {
112 cpu_dai->capture_active--;
113 for (i = 0; i < rtd->num_codecs; i++)
114 rtd->codec_dais[i]->capture_active--;
115 }
116
117 cpu_dai->active--;
118 cpu_dai->component->active--;
119 for (i = 0; i < rtd->num_codecs; i++) {
120 rtd->codec_dais[i]->component->active--;
121 rtd->codec_dais[i]->active--;
122 }
123 }
124
125 /**
126 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
127 * @rtd: The ASoC PCM runtime that should be checked.
128 *
129 * This function checks whether the power down delay should be ignored for a
130 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
131 * been configured to ignore the delay, or if none of the components benefits
132 * from having the delay.
133 */
134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
135 {
136 int i;
137 bool ignore = true;
138
139 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
140 return true;
141
142 for (i = 0; i < rtd->num_codecs; i++)
143 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
144
145 return rtd->cpu_dai->component->ignore_pmdown_time && ignore;
146 }
147
148 /**
149 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
150 * @substream: the pcm substream
151 * @hw: the hardware parameters
152 *
153 * Sets the substream runtime hardware parameters.
154 */
155 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
156 const struct snd_pcm_hardware *hw)
157 {
158 struct snd_pcm_runtime *runtime = substream->runtime;
159 runtime->hw.info = hw->info;
160 runtime->hw.formats = hw->formats;
161 runtime->hw.period_bytes_min = hw->period_bytes_min;
162 runtime->hw.period_bytes_max = hw->period_bytes_max;
163 runtime->hw.periods_min = hw->periods_min;
164 runtime->hw.periods_max = hw->periods_max;
165 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
166 runtime->hw.fifo_size = hw->fifo_size;
167 return 0;
168 }
169 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
170
171 /* DPCM stream event, send event to FE and all active BEs. */
172 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
173 int event)
174 {
175 struct snd_soc_dpcm *dpcm;
176
177 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
178
179 struct snd_soc_pcm_runtime *be = dpcm->be;
180
181 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
182 be->dai_link->name, event, dir);
183
184 snd_soc_dapm_stream_event(be, dir, event);
185 }
186
187 snd_soc_dapm_stream_event(fe, dir, event);
188
189 return 0;
190 }
191
192 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
193 struct snd_soc_dai *soc_dai)
194 {
195 struct snd_soc_pcm_runtime *rtd = substream->private_data;
196 int ret;
197
198 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
199 rtd->dai_link->symmetric_rates)) {
200 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
201 soc_dai->rate);
202
203 ret = snd_pcm_hw_constraint_single(substream->runtime,
204 SNDRV_PCM_HW_PARAM_RATE,
205 soc_dai->rate);
206 if (ret < 0) {
207 dev_err(soc_dai->dev,
208 "ASoC: Unable to apply rate constraint: %d\n",
209 ret);
210 return ret;
211 }
212 }
213
214 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
215 rtd->dai_link->symmetric_channels)) {
216 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
217 soc_dai->channels);
218
219 ret = snd_pcm_hw_constraint_single(substream->runtime,
220 SNDRV_PCM_HW_PARAM_CHANNELS,
221 soc_dai->channels);
222 if (ret < 0) {
223 dev_err(soc_dai->dev,
224 "ASoC: Unable to apply channel symmetry constraint: %d\n",
225 ret);
226 return ret;
227 }
228 }
229
230 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
231 rtd->dai_link->symmetric_samplebits)) {
232 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
233 soc_dai->sample_bits);
234
235 ret = snd_pcm_hw_constraint_single(substream->runtime,
236 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
237 soc_dai->sample_bits);
238 if (ret < 0) {
239 dev_err(soc_dai->dev,
240 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
241 ret);
242 return ret;
243 }
244 }
245
246 return 0;
247 }
248
249 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
250 struct snd_pcm_hw_params *params)
251 {
252 struct snd_soc_pcm_runtime *rtd = substream->private_data;
253 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
254 unsigned int rate, channels, sample_bits, symmetry, i;
255
256 rate = params_rate(params);
257 channels = params_channels(params);
258 sample_bits = snd_pcm_format_physical_width(params_format(params));
259
260 /* reject unmatched parameters when applying symmetry */
261 symmetry = cpu_dai->driver->symmetric_rates ||
262 rtd->dai_link->symmetric_rates;
263
264 for (i = 0; i < rtd->num_codecs; i++)
265 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
266
267 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
268 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
269 cpu_dai->rate, rate);
270 return -EINVAL;
271 }
272
273 symmetry = cpu_dai->driver->symmetric_channels ||
274 rtd->dai_link->symmetric_channels;
275
276 for (i = 0; i < rtd->num_codecs; i++)
277 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
278
279 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
280 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
281 cpu_dai->channels, channels);
282 return -EINVAL;
283 }
284
285 symmetry = cpu_dai->driver->symmetric_samplebits ||
286 rtd->dai_link->symmetric_samplebits;
287
288 for (i = 0; i < rtd->num_codecs; i++)
289 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
290
291 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
292 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
293 cpu_dai->sample_bits, sample_bits);
294 return -EINVAL;
295 }
296
297 return 0;
298 }
299
300 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
301 {
302 struct snd_soc_pcm_runtime *rtd = substream->private_data;
303 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
304 struct snd_soc_dai_link *link = rtd->dai_link;
305 unsigned int symmetry, i;
306
307 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
308 cpu_driver->symmetric_channels || link->symmetric_channels ||
309 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
310
311 for (i = 0; i < rtd->num_codecs; i++)
312 symmetry = symmetry ||
313 rtd->codec_dais[i]->driver->symmetric_rates ||
314 rtd->codec_dais[i]->driver->symmetric_channels ||
315 rtd->codec_dais[i]->driver->symmetric_samplebits;
316
317 return symmetry;
318 }
319
320 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
321 {
322 struct snd_soc_pcm_runtime *rtd = substream->private_data;
323 int ret;
324
325 if (!bits)
326 return;
327
328 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
329 if (ret != 0)
330 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
331 bits, ret);
332 }
333
334 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
335 {
336 struct snd_soc_pcm_runtime *rtd = substream->private_data;
337 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
338 struct snd_soc_dai *codec_dai;
339 int i;
340 unsigned int bits = 0, cpu_bits;
341
342 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
343 for (i = 0; i < rtd->num_codecs; i++) {
344 codec_dai = rtd->codec_dais[i];
345 if (codec_dai->driver->playback.sig_bits == 0) {
346 bits = 0;
347 break;
348 }
349 bits = max(codec_dai->driver->playback.sig_bits, bits);
350 }
351 cpu_bits = cpu_dai->driver->playback.sig_bits;
352 } else {
353 for (i = 0; i < rtd->num_codecs; i++) {
354 codec_dai = rtd->codec_dais[i];
355 if (codec_dai->driver->capture.sig_bits == 0) {
356 bits = 0;
357 break;
358 }
359 bits = max(codec_dai->driver->capture.sig_bits, bits);
360 }
361 cpu_bits = cpu_dai->driver->capture.sig_bits;
362 }
363
364 soc_pcm_set_msb(substream, bits);
365 soc_pcm_set_msb(substream, cpu_bits);
366 }
367
368 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
369 {
370 struct snd_pcm_runtime *runtime = substream->runtime;
371 struct snd_pcm_hardware *hw = &runtime->hw;
372 struct snd_soc_pcm_runtime *rtd = substream->private_data;
373 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
374 struct snd_soc_dai_driver *codec_dai_drv;
375 struct snd_soc_pcm_stream *codec_stream;
376 struct snd_soc_pcm_stream *cpu_stream;
377 unsigned int chan_min = 0, chan_max = UINT_MAX;
378 unsigned int rate_min = 0, rate_max = UINT_MAX;
379 unsigned int rates = UINT_MAX;
380 u64 formats = ULLONG_MAX;
381 int i;
382
383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
384 cpu_stream = &cpu_dai_drv->playback;
385 else
386 cpu_stream = &cpu_dai_drv->capture;
387
388 /* first calculate min/max only for CODECs in the DAI link */
389 for (i = 0; i < rtd->num_codecs; i++) {
390
391 /*
392 * Skip CODECs which don't support the current stream type.
393 * Otherwise, since the rate, channel, and format values will
394 * zero in that case, we would have no usable settings left,
395 * causing the resulting setup to fail.
396 * At least one CODEC should match, otherwise we should have
397 * bailed out on a higher level, since there would be no
398 * CODEC to support the transfer direction in that case.
399 */
400 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
401 substream->stream))
402 continue;
403
404 codec_dai_drv = rtd->codec_dais[i]->driver;
405 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
406 codec_stream = &codec_dai_drv->playback;
407 else
408 codec_stream = &codec_dai_drv->capture;
409 chan_min = max(chan_min, codec_stream->channels_min);
410 chan_max = min(chan_max, codec_stream->channels_max);
411 rate_min = max(rate_min, codec_stream->rate_min);
412 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
413 formats &= codec_stream->formats;
414 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
415 }
416
417 /*
418 * chan min/max cannot be enforced if there are multiple CODEC DAIs
419 * connected to a single CPU DAI, use CPU DAI's directly and let
420 * channel allocation be fixed up later
421 */
422 if (rtd->num_codecs > 1) {
423 chan_min = cpu_stream->channels_min;
424 chan_max = cpu_stream->channels_max;
425 }
426
427 hw->channels_min = max(chan_min, cpu_stream->channels_min);
428 hw->channels_max = min(chan_max, cpu_stream->channels_max);
429 if (hw->formats)
430 hw->formats &= formats & cpu_stream->formats;
431 else
432 hw->formats = formats & cpu_stream->formats;
433 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
434
435 snd_pcm_limit_hw_rates(runtime);
436
437 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
438 hw->rate_min = max(hw->rate_min, rate_min);
439 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
440 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
441 }
442
443 /*
444 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
445 * then initialized and any private data can be allocated. This also calls
446 * startup for the cpu DAI, platform, machine and codec DAI.
447 */
448 static int soc_pcm_open(struct snd_pcm_substream *substream)
449 {
450 struct snd_soc_pcm_runtime *rtd = substream->private_data;
451 struct snd_pcm_runtime *runtime = substream->runtime;
452 struct snd_soc_platform *platform = rtd->platform;
453 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
454 struct snd_soc_dai *codec_dai;
455 const char *codec_dai_name = "multicodec";
456 int i, ret = 0;
457
458 pinctrl_pm_select_default_state(cpu_dai->dev);
459 for (i = 0; i < rtd->num_codecs; i++)
460 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
461 pm_runtime_get_sync(cpu_dai->dev);
462 for (i = 0; i < rtd->num_codecs; i++)
463 pm_runtime_get_sync(rtd->codec_dais[i]->dev);
464 pm_runtime_get_sync(platform->dev);
465
466 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
467
468 /* startup the audio subsystem */
469 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
470 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
471 if (ret < 0) {
472 dev_err(cpu_dai->dev, "ASoC: can't open interface"
473 " %s: %d\n", cpu_dai->name, ret);
474 goto out;
475 }
476 }
477
478 if (platform->driver->ops && platform->driver->ops->open) {
479 ret = platform->driver->ops->open(substream);
480 if (ret < 0) {
481 dev_err(platform->dev, "ASoC: can't open platform"
482 " %s: %d\n", platform->component.name, ret);
483 goto platform_err;
484 }
485 }
486
487 for (i = 0; i < rtd->num_codecs; i++) {
488 codec_dai = rtd->codec_dais[i];
489 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
490 ret = codec_dai->driver->ops->startup(substream,
491 codec_dai);
492 if (ret < 0) {
493 dev_err(codec_dai->dev,
494 "ASoC: can't open codec %s: %d\n",
495 codec_dai->name, ret);
496 goto codec_dai_err;
497 }
498 }
499
500 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
501 codec_dai->tx_mask = 0;
502 else
503 codec_dai->rx_mask = 0;
504 }
505
506 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
507 ret = rtd->dai_link->ops->startup(substream);
508 if (ret < 0) {
509 pr_err("ASoC: %s startup failed: %d\n",
510 rtd->dai_link->name, ret);
511 goto machine_err;
512 }
513 }
514
515 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
516 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
517 goto dynamic;
518
519 /* Check that the codec and cpu DAIs are compatible */
520 soc_pcm_init_runtime_hw(substream);
521
522 if (rtd->num_codecs == 1)
523 codec_dai_name = rtd->codec_dai->name;
524
525 if (soc_pcm_has_symmetry(substream))
526 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
527
528 ret = -EINVAL;
529 if (!runtime->hw.rates) {
530 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
531 codec_dai_name, cpu_dai->name);
532 goto config_err;
533 }
534 if (!runtime->hw.formats) {
535 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
536 codec_dai_name, cpu_dai->name);
537 goto config_err;
538 }
539 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
540 runtime->hw.channels_min > runtime->hw.channels_max) {
541 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
542 codec_dai_name, cpu_dai->name);
543 goto config_err;
544 }
545
546 soc_pcm_apply_msb(substream);
547
548 /* Symmetry only applies if we've already got an active stream. */
549 if (cpu_dai->active) {
550 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
551 if (ret != 0)
552 goto config_err;
553 }
554
555 for (i = 0; i < rtd->num_codecs; i++) {
556 if (rtd->codec_dais[i]->active) {
557 ret = soc_pcm_apply_symmetry(substream,
558 rtd->codec_dais[i]);
559 if (ret != 0)
560 goto config_err;
561 }
562 }
563
564 pr_debug("ASoC: %s <-> %s info:\n",
565 codec_dai_name, cpu_dai->name);
566 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
567 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
568 runtime->hw.channels_max);
569 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
570 runtime->hw.rate_max);
571
572 dynamic:
573
574 snd_soc_runtime_activate(rtd, substream->stream);
575
576 mutex_unlock(&rtd->pcm_mutex);
577 return 0;
578
579 config_err:
580 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
581 rtd->dai_link->ops->shutdown(substream);
582
583 machine_err:
584 i = rtd->num_codecs;
585
586 codec_dai_err:
587 while (--i >= 0) {
588 codec_dai = rtd->codec_dais[i];
589 if (codec_dai->driver->ops->shutdown)
590 codec_dai->driver->ops->shutdown(substream, codec_dai);
591 }
592
593 if (platform->driver->ops && platform->driver->ops->close)
594 platform->driver->ops->close(substream);
595
596 platform_err:
597 if (cpu_dai->driver->ops->shutdown)
598 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
599 out:
600 mutex_unlock(&rtd->pcm_mutex);
601
602 pm_runtime_put(platform->dev);
603 for (i = 0; i < rtd->num_codecs; i++)
604 pm_runtime_put(rtd->codec_dais[i]->dev);
605 pm_runtime_put(cpu_dai->dev);
606 for (i = 0; i < rtd->num_codecs; i++) {
607 if (!rtd->codec_dais[i]->active)
608 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
609 }
610 if (!cpu_dai->active)
611 pinctrl_pm_select_sleep_state(cpu_dai->dev);
612
613 return ret;
614 }
615
616 /*
617 * Power down the audio subsystem pmdown_time msecs after close is called.
618 * This is to ensure there are no pops or clicks in between any music tracks
619 * due to DAPM power cycling.
620 */
621 static void close_delayed_work(struct work_struct *work)
622 {
623 struct snd_soc_pcm_runtime *rtd =
624 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
625 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
626
627 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
628
629 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
630 codec_dai->driver->playback.stream_name,
631 codec_dai->playback_active ? "active" : "inactive",
632 rtd->pop_wait ? "yes" : "no");
633
634 /* are we waiting on this codec DAI stream */
635 if (rtd->pop_wait == 1) {
636 rtd->pop_wait = 0;
637 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
638 SND_SOC_DAPM_STREAM_STOP);
639 }
640
641 mutex_unlock(&rtd->pcm_mutex);
642 }
643
644 /*
645 * Called by ALSA when a PCM substream is closed. Private data can be
646 * freed here. The cpu DAI, codec DAI, machine and platform are also
647 * shutdown.
648 */
649 static int soc_pcm_close(struct snd_pcm_substream *substream)
650 {
651 struct snd_soc_pcm_runtime *rtd = substream->private_data;
652 struct snd_soc_platform *platform = rtd->platform;
653 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
654 struct snd_soc_dai *codec_dai;
655 int i;
656
657 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
658
659 snd_soc_runtime_deactivate(rtd, substream->stream);
660
661 /* clear the corresponding DAIs rate when inactive */
662 if (!cpu_dai->active)
663 cpu_dai->rate = 0;
664
665 for (i = 0; i < rtd->num_codecs; i++) {
666 codec_dai = rtd->codec_dais[i];
667 if (!codec_dai->active)
668 codec_dai->rate = 0;
669 }
670
671 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
672
673 if (cpu_dai->driver->ops->shutdown)
674 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
675
676 for (i = 0; i < rtd->num_codecs; i++) {
677 codec_dai = rtd->codec_dais[i];
678 if (codec_dai->driver->ops->shutdown)
679 codec_dai->driver->ops->shutdown(substream, codec_dai);
680 }
681
682 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
683 rtd->dai_link->ops->shutdown(substream);
684
685 if (platform->driver->ops && platform->driver->ops->close)
686 platform->driver->ops->close(substream);
687
688 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
689 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
690 /* powered down playback stream now */
691 snd_soc_dapm_stream_event(rtd,
692 SNDRV_PCM_STREAM_PLAYBACK,
693 SND_SOC_DAPM_STREAM_STOP);
694 } else {
695 /* start delayed pop wq here for playback streams */
696 rtd->pop_wait = 1;
697 queue_delayed_work(system_power_efficient_wq,
698 &rtd->delayed_work,
699 msecs_to_jiffies(rtd->pmdown_time));
700 }
701 } else {
702 /* capture streams can be powered down now */
703 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
704 SND_SOC_DAPM_STREAM_STOP);
705 }
706
707 mutex_unlock(&rtd->pcm_mutex);
708
709 pm_runtime_put(platform->dev);
710 for (i = 0; i < rtd->num_codecs; i++)
711 pm_runtime_put(rtd->codec_dais[i]->dev);
712 pm_runtime_put(cpu_dai->dev);
713 for (i = 0; i < rtd->num_codecs; i++) {
714 if (!rtd->codec_dais[i]->active)
715 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
716 }
717 if (!cpu_dai->active)
718 pinctrl_pm_select_sleep_state(cpu_dai->dev);
719
720 return 0;
721 }
722
723 /*
724 * Called by ALSA when the PCM substream is prepared, can set format, sample
725 * rate, etc. This function is non atomic and can be called multiple times,
726 * it can refer to the runtime info.
727 */
728 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
729 {
730 struct snd_soc_pcm_runtime *rtd = substream->private_data;
731 struct snd_soc_platform *platform = rtd->platform;
732 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
733 struct snd_soc_dai *codec_dai;
734 int i, ret = 0;
735
736 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
737
738 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
739 ret = rtd->dai_link->ops->prepare(substream);
740 if (ret < 0) {
741 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
742 " %d\n", ret);
743 goto out;
744 }
745 }
746
747 if (platform->driver->ops && platform->driver->ops->prepare) {
748 ret = platform->driver->ops->prepare(substream);
749 if (ret < 0) {
750 dev_err(platform->dev, "ASoC: platform prepare error:"
751 " %d\n", ret);
752 goto out;
753 }
754 }
755
756 for (i = 0; i < rtd->num_codecs; i++) {
757 codec_dai = rtd->codec_dais[i];
758 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
759 ret = codec_dai->driver->ops->prepare(substream,
760 codec_dai);
761 if (ret < 0) {
762 dev_err(codec_dai->dev,
763 "ASoC: codec DAI prepare error: %d\n",
764 ret);
765 goto out;
766 }
767 }
768 }
769
770 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
771 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
772 if (ret < 0) {
773 dev_err(cpu_dai->dev,
774 "ASoC: cpu DAI prepare error: %d\n", ret);
775 goto out;
776 }
777 }
778
779 /* cancel any delayed stream shutdown that is pending */
780 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
781 rtd->pop_wait) {
782 rtd->pop_wait = 0;
783 cancel_delayed_work(&rtd->delayed_work);
784 }
785
786 snd_soc_dapm_stream_event(rtd, substream->stream,
787 SND_SOC_DAPM_STREAM_START);
788
789 for (i = 0; i < rtd->num_codecs; i++)
790 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
791 substream->stream);
792 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
793
794 out:
795 mutex_unlock(&rtd->pcm_mutex);
796 return ret;
797 }
798
799 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
800 unsigned int mask)
801 {
802 struct snd_interval *interval;
803 int channels = hweight_long(mask);
804
805 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
806 interval->min = channels;
807 interval->max = channels;
808 }
809
810 int soc_dai_hw_params(struct snd_pcm_substream *substream,
811 struct snd_pcm_hw_params *params,
812 struct snd_soc_dai *dai)
813 {
814 int ret;
815
816 if (dai->driver->ops && dai->driver->ops->hw_params) {
817 ret = dai->driver->ops->hw_params(substream, params, dai);
818 if (ret < 0) {
819 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
820 dai->name, ret);
821 return ret;
822 }
823 }
824
825 return 0;
826 }
827
828 /*
829 * Called by ALSA when the hardware params are set by application. This
830 * function can also be called multiple times and can allocate buffers
831 * (using snd_pcm_lib_* ). It's non-atomic.
832 */
833 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
834 struct snd_pcm_hw_params *params)
835 {
836 struct snd_soc_pcm_runtime *rtd = substream->private_data;
837 struct snd_soc_platform *platform = rtd->platform;
838 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
839 int i, ret = 0;
840
841 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
842
843 ret = soc_pcm_params_symmetry(substream, params);
844 if (ret)
845 goto out;
846
847 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
848 ret = rtd->dai_link->ops->hw_params(substream, params);
849 if (ret < 0) {
850 dev_err(rtd->card->dev, "ASoC: machine hw_params"
851 " failed: %d\n", ret);
852 goto out;
853 }
854 }
855
856 for (i = 0; i < rtd->num_codecs; i++) {
857 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
858 struct snd_pcm_hw_params codec_params;
859
860 /*
861 * Skip CODECs which don't support the current stream type,
862 * the idea being that if a CODEC is not used for the currently
863 * set up transfer direction, it should not need to be
864 * configured, especially since the configuration used might
865 * not even be supported by that CODEC. There may be cases
866 * however where a CODEC needs to be set up although it is
867 * actually not being used for the transfer, e.g. if a
868 * capture-only CODEC is acting as an LRCLK and/or BCLK master
869 * for the DAI link including a playback-only CODEC.
870 * If this becomes necessary, we will have to augment the
871 * machine driver setup with information on how to act, so
872 * we can do the right thing here.
873 */
874 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
875 continue;
876
877 /* copy params for each codec */
878 codec_params = *params;
879
880 /* fixup params based on TDM slot masks */
881 if (codec_dai->tx_mask)
882 soc_pcm_codec_params_fixup(&codec_params,
883 codec_dai->tx_mask);
884 if (codec_dai->rx_mask)
885 soc_pcm_codec_params_fixup(&codec_params,
886 codec_dai->rx_mask);
887
888 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
889 if(ret < 0)
890 goto codec_err;
891
892 codec_dai->rate = params_rate(&codec_params);
893 codec_dai->channels = params_channels(&codec_params);
894 codec_dai->sample_bits = snd_pcm_format_physical_width(
895 params_format(&codec_params));
896 }
897
898 ret = soc_dai_hw_params(substream, params, cpu_dai);
899 if (ret < 0)
900 goto interface_err;
901
902 if (platform->driver->ops && platform->driver->ops->hw_params) {
903 ret = platform->driver->ops->hw_params(substream, params);
904 if (ret < 0) {
905 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
906 platform->component.name, ret);
907 goto platform_err;
908 }
909 }
910
911 /* store the parameters for each DAIs */
912 cpu_dai->rate = params_rate(params);
913 cpu_dai->channels = params_channels(params);
914 cpu_dai->sample_bits =
915 snd_pcm_format_physical_width(params_format(params));
916
917 out:
918 mutex_unlock(&rtd->pcm_mutex);
919 return ret;
920
921 platform_err:
922 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
923 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
924
925 interface_err:
926 i = rtd->num_codecs;
927
928 codec_err:
929 while (--i >= 0) {
930 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
931 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
932 codec_dai->driver->ops->hw_free(substream, codec_dai);
933 codec_dai->rate = 0;
934 }
935
936 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
937 rtd->dai_link->ops->hw_free(substream);
938
939 mutex_unlock(&rtd->pcm_mutex);
940 return ret;
941 }
942
943 /*
944 * Frees resources allocated by hw_params, can be called multiple times
945 */
946 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
947 {
948 struct snd_soc_pcm_runtime *rtd = substream->private_data;
949 struct snd_soc_platform *platform = rtd->platform;
950 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
951 struct snd_soc_dai *codec_dai;
952 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
953 int i;
954
955 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
956
957 /* clear the corresponding DAIs parameters when going to be inactive */
958 if (cpu_dai->active == 1) {
959 cpu_dai->rate = 0;
960 cpu_dai->channels = 0;
961 cpu_dai->sample_bits = 0;
962 }
963
964 for (i = 0; i < rtd->num_codecs; i++) {
965 codec_dai = rtd->codec_dais[i];
966 if (codec_dai->active == 1) {
967 codec_dai->rate = 0;
968 codec_dai->channels = 0;
969 codec_dai->sample_bits = 0;
970 }
971 }
972
973 /* apply codec digital mute */
974 for (i = 0; i < rtd->num_codecs; i++) {
975 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
976 (!playback && rtd->codec_dais[i]->capture_active == 1))
977 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
978 substream->stream);
979 }
980
981 /* free any machine hw params */
982 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
983 rtd->dai_link->ops->hw_free(substream);
984
985 /* free any DMA resources */
986 if (platform->driver->ops && platform->driver->ops->hw_free)
987 platform->driver->ops->hw_free(substream);
988
989 /* now free hw params for the DAIs */
990 for (i = 0; i < rtd->num_codecs; i++) {
991 codec_dai = rtd->codec_dais[i];
992 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
993 codec_dai->driver->ops->hw_free(substream, codec_dai);
994 }
995
996 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
997 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
998
999 mutex_unlock(&rtd->pcm_mutex);
1000 return 0;
1001 }
1002
1003 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1004 {
1005 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1006 struct snd_soc_platform *platform = rtd->platform;
1007 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1008 struct snd_soc_dai *codec_dai;
1009 int i, ret;
1010
1011 for (i = 0; i < rtd->num_codecs; i++) {
1012 codec_dai = rtd->codec_dais[i];
1013 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
1014 ret = codec_dai->driver->ops->trigger(substream,
1015 cmd, codec_dai);
1016 if (ret < 0)
1017 return ret;
1018 }
1019 }
1020
1021 if (platform->driver->ops && platform->driver->ops->trigger) {
1022 ret = platform->driver->ops->trigger(substream, cmd);
1023 if (ret < 0)
1024 return ret;
1025 }
1026
1027 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
1028 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1029 if (ret < 0)
1030 return ret;
1031 }
1032
1033 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1034 ret = rtd->dai_link->ops->trigger(substream, cmd);
1035 if (ret < 0)
1036 return ret;
1037 }
1038
1039 return 0;
1040 }
1041
1042 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1043 int cmd)
1044 {
1045 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1046 struct snd_soc_platform *platform = rtd->platform;
1047 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1048 struct snd_soc_dai *codec_dai;
1049 int i, ret;
1050
1051 for (i = 0; i < rtd->num_codecs; i++) {
1052 codec_dai = rtd->codec_dais[i];
1053 if (codec_dai->driver->ops &&
1054 codec_dai->driver->ops->bespoke_trigger) {
1055 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1056 cmd, codec_dai);
1057 if (ret < 0)
1058 return ret;
1059 }
1060 }
1061
1062 if (platform->driver->bespoke_trigger) {
1063 ret = platform->driver->bespoke_trigger(substream, cmd);
1064 if (ret < 0)
1065 return ret;
1066 }
1067
1068 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1069 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1070 if (ret < 0)
1071 return ret;
1072 }
1073 return 0;
1074 }
1075 /*
1076 * soc level wrapper for pointer callback
1077 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1078 * the runtime->delay will be updated accordingly.
1079 */
1080 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1081 {
1082 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1083 struct snd_soc_platform *platform = rtd->platform;
1084 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1085 struct snd_soc_dai *codec_dai;
1086 struct snd_pcm_runtime *runtime = substream->runtime;
1087 snd_pcm_uframes_t offset = 0;
1088 snd_pcm_sframes_t delay = 0;
1089 snd_pcm_sframes_t codec_delay = 0;
1090 int i;
1091
1092 if (platform->driver->ops && platform->driver->ops->pointer)
1093 offset = platform->driver->ops->pointer(substream);
1094
1095 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1096 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1097
1098 for (i = 0; i < rtd->num_codecs; i++) {
1099 codec_dai = rtd->codec_dais[i];
1100 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1101 codec_delay = max(codec_delay,
1102 codec_dai->driver->ops->delay(substream,
1103 codec_dai));
1104 }
1105 delay += codec_delay;
1106
1107 /*
1108 * None of the existing platform drivers implement delay(), so
1109 * for now the codec_dai of first multicodec entry is used
1110 */
1111 if (platform->driver->delay)
1112 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1113
1114 runtime->delay = delay;
1115
1116 return offset;
1117 }
1118
1119 /* connect a FE and BE */
1120 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1121 struct snd_soc_pcm_runtime *be, int stream)
1122 {
1123 struct snd_soc_dpcm *dpcm;
1124
1125 /* only add new dpcms */
1126 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1127 if (dpcm->be == be && dpcm->fe == fe)
1128 return 0;
1129 }
1130
1131 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1132 if (!dpcm)
1133 return -ENOMEM;
1134
1135 dpcm->be = be;
1136 dpcm->fe = fe;
1137 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1138 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1139 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1140 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1141
1142 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1143 stream ? "capture" : "playback", fe->dai_link->name,
1144 stream ? "<-" : "->", be->dai_link->name);
1145
1146 #ifdef CONFIG_DEBUG_FS
1147 if (fe->debugfs_dpcm_root)
1148 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1149 fe->debugfs_dpcm_root, &dpcm->state);
1150 #endif
1151 return 1;
1152 }
1153
1154 /* reparent a BE onto another FE */
1155 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1156 struct snd_soc_pcm_runtime *be, int stream)
1157 {
1158 struct snd_soc_dpcm *dpcm;
1159 struct snd_pcm_substream *fe_substream, *be_substream;
1160
1161 /* reparent if BE is connected to other FEs */
1162 if (!be->dpcm[stream].users)
1163 return;
1164
1165 be_substream = snd_soc_dpcm_get_substream(be, stream);
1166
1167 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1168 if (dpcm->fe == fe)
1169 continue;
1170
1171 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1172 stream ? "capture" : "playback",
1173 dpcm->fe->dai_link->name,
1174 stream ? "<-" : "->", dpcm->be->dai_link->name);
1175
1176 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1177 be_substream->runtime = fe_substream->runtime;
1178 break;
1179 }
1180 }
1181
1182 /* disconnect a BE and FE */
1183 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1184 {
1185 struct snd_soc_dpcm *dpcm, *d;
1186
1187 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1188 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1189 stream ? "capture" : "playback",
1190 dpcm->be->dai_link->name);
1191
1192 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1193 continue;
1194
1195 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1196 stream ? "capture" : "playback", fe->dai_link->name,
1197 stream ? "<-" : "->", dpcm->be->dai_link->name);
1198
1199 /* BEs still alive need new FE */
1200 dpcm_be_reparent(fe, dpcm->be, stream);
1201
1202 #ifdef CONFIG_DEBUG_FS
1203 debugfs_remove(dpcm->debugfs_state);
1204 #endif
1205 list_del(&dpcm->list_be);
1206 list_del(&dpcm->list_fe);
1207 kfree(dpcm);
1208 }
1209 }
1210
1211 /* get BE for DAI widget and stream */
1212 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1213 struct snd_soc_dapm_widget *widget, int stream)
1214 {
1215 struct snd_soc_pcm_runtime *be;
1216 int i;
1217
1218 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1219 list_for_each_entry(be, &card->rtd_list, list) {
1220
1221 if (!be->dai_link->no_pcm)
1222 continue;
1223
1224 if (be->cpu_dai->playback_widget == widget)
1225 return be;
1226
1227 for (i = 0; i < be->num_codecs; i++) {
1228 struct snd_soc_dai *dai = be->codec_dais[i];
1229 if (dai->playback_widget == widget)
1230 return be;
1231 }
1232 }
1233 } else {
1234
1235 list_for_each_entry(be, &card->rtd_list, list) {
1236
1237 if (!be->dai_link->no_pcm)
1238 continue;
1239
1240 if (be->cpu_dai->capture_widget == widget)
1241 return be;
1242
1243 for (i = 0; i < be->num_codecs; i++) {
1244 struct snd_soc_dai *dai = be->codec_dais[i];
1245 if (dai->capture_widget == widget)
1246 return be;
1247 }
1248 }
1249 }
1250
1251 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1252 stream ? "capture" : "playback", widget->name);
1253 return NULL;
1254 }
1255
1256 static inline struct snd_soc_dapm_widget *
1257 dai_get_widget(struct snd_soc_dai *dai, int stream)
1258 {
1259 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1260 return dai->playback_widget;
1261 else
1262 return dai->capture_widget;
1263 }
1264
1265 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1266 struct snd_soc_dapm_widget *widget)
1267 {
1268 int i;
1269
1270 for (i = 0; i < list->num_widgets; i++) {
1271 if (widget == list->widgets[i])
1272 return 1;
1273 }
1274
1275 return 0;
1276 }
1277
1278 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1279 int stream, struct snd_soc_dapm_widget_list **list)
1280 {
1281 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1282 int paths;
1283
1284 /* get number of valid DAI paths and their widgets */
1285 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list);
1286
1287 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1288 stream ? "capture" : "playback");
1289
1290 return paths;
1291 }
1292
1293 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1294 struct snd_soc_dapm_widget_list **list_)
1295 {
1296 struct snd_soc_dpcm *dpcm;
1297 struct snd_soc_dapm_widget_list *list = *list_;
1298 struct snd_soc_dapm_widget *widget;
1299 int prune = 0;
1300
1301 /* Destroy any old FE <--> BE connections */
1302 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1303 unsigned int i;
1304
1305 /* is there a valid CPU DAI widget for this BE */
1306 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1307
1308 /* prune the BE if it's no longer in our active list */
1309 if (widget && widget_in_list(list, widget))
1310 continue;
1311
1312 /* is there a valid CODEC DAI widget for this BE */
1313 for (i = 0; i < dpcm->be->num_codecs; i++) {
1314 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1315 widget = dai_get_widget(dai, stream);
1316
1317 /* prune the BE if it's no longer in our active list */
1318 if (widget && widget_in_list(list, widget))
1319 continue;
1320 }
1321
1322 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1323 stream ? "capture" : "playback",
1324 dpcm->be->dai_link->name, fe->dai_link->name);
1325 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1326 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1327 prune++;
1328 }
1329
1330 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1331 return prune;
1332 }
1333
1334 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1335 struct snd_soc_dapm_widget_list **list_)
1336 {
1337 struct snd_soc_card *card = fe->card;
1338 struct snd_soc_dapm_widget_list *list = *list_;
1339 struct snd_soc_pcm_runtime *be;
1340 int i, new = 0, err;
1341
1342 /* Create any new FE <--> BE connections */
1343 for (i = 0; i < list->num_widgets; i++) {
1344
1345 switch (list->widgets[i]->id) {
1346 case snd_soc_dapm_dai_in:
1347 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1348 continue;
1349 break;
1350 case snd_soc_dapm_dai_out:
1351 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1352 continue;
1353 break;
1354 default:
1355 continue;
1356 }
1357
1358 /* is there a valid BE rtd for this widget */
1359 be = dpcm_get_be(card, list->widgets[i], stream);
1360 if (!be) {
1361 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1362 list->widgets[i]->name);
1363 continue;
1364 }
1365
1366 /* make sure BE is a real BE */
1367 if (!be->dai_link->no_pcm)
1368 continue;
1369
1370 /* don't connect if FE is not running */
1371 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1372 continue;
1373
1374 /* newly connected FE and BE */
1375 err = dpcm_be_connect(fe, be, stream);
1376 if (err < 0) {
1377 dev_err(fe->dev, "ASoC: can't connect %s\n",
1378 list->widgets[i]->name);
1379 break;
1380 } else if (err == 0) /* already connected */
1381 continue;
1382
1383 /* new */
1384 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1385 new++;
1386 }
1387
1388 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1389 return new;
1390 }
1391
1392 /*
1393 * Find the corresponding BE DAIs that source or sink audio to this
1394 * FE substream.
1395 */
1396 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1397 int stream, struct snd_soc_dapm_widget_list **list, int new)
1398 {
1399 if (new)
1400 return dpcm_add_paths(fe, stream, list);
1401 else
1402 return dpcm_prune_paths(fe, stream, list);
1403 }
1404
1405 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1406 {
1407 struct snd_soc_dpcm *dpcm;
1408
1409 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1410 dpcm->be->dpcm[stream].runtime_update =
1411 SND_SOC_DPCM_UPDATE_NO;
1412 }
1413
1414 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1415 int stream)
1416 {
1417 struct snd_soc_dpcm *dpcm;
1418
1419 /* disable any enabled and non active backends */
1420 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1421
1422 struct snd_soc_pcm_runtime *be = dpcm->be;
1423 struct snd_pcm_substream *be_substream =
1424 snd_soc_dpcm_get_substream(be, stream);
1425
1426 if (be->dpcm[stream].users == 0)
1427 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1428 stream ? "capture" : "playback",
1429 be->dpcm[stream].state);
1430
1431 if (--be->dpcm[stream].users != 0)
1432 continue;
1433
1434 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1435 continue;
1436
1437 soc_pcm_close(be_substream);
1438 be_substream->runtime = NULL;
1439 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1440 }
1441 }
1442
1443 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1444 {
1445 struct snd_soc_dpcm *dpcm;
1446 int err, count = 0;
1447
1448 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1449 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1450
1451 struct snd_soc_pcm_runtime *be = dpcm->be;
1452 struct snd_pcm_substream *be_substream =
1453 snd_soc_dpcm_get_substream(be, stream);
1454
1455 if (!be_substream) {
1456 dev_err(be->dev, "ASoC: no backend %s stream\n",
1457 stream ? "capture" : "playback");
1458 continue;
1459 }
1460
1461 /* is this op for this BE ? */
1462 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1463 continue;
1464
1465 /* first time the dpcm is open ? */
1466 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1467 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1468 stream ? "capture" : "playback",
1469 be->dpcm[stream].state);
1470
1471 if (be->dpcm[stream].users++ != 0)
1472 continue;
1473
1474 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1475 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1476 continue;
1477
1478 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1479 stream ? "capture" : "playback", be->dai_link->name);
1480
1481 be_substream->runtime = be->dpcm[stream].runtime;
1482 err = soc_pcm_open(be_substream);
1483 if (err < 0) {
1484 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1485 be->dpcm[stream].users--;
1486 if (be->dpcm[stream].users < 0)
1487 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1488 stream ? "capture" : "playback",
1489 be->dpcm[stream].state);
1490
1491 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1492 goto unwind;
1493 }
1494
1495 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1496 count++;
1497 }
1498
1499 return count;
1500
1501 unwind:
1502 /* disable any enabled and non active backends */
1503 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1504 struct snd_soc_pcm_runtime *be = dpcm->be;
1505 struct snd_pcm_substream *be_substream =
1506 snd_soc_dpcm_get_substream(be, stream);
1507
1508 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1509 continue;
1510
1511 if (be->dpcm[stream].users == 0)
1512 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1513 stream ? "capture" : "playback",
1514 be->dpcm[stream].state);
1515
1516 if (--be->dpcm[stream].users != 0)
1517 continue;
1518
1519 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1520 continue;
1521
1522 soc_pcm_close(be_substream);
1523 be_substream->runtime = NULL;
1524 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1525 }
1526
1527 return err;
1528 }
1529
1530 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1531 struct snd_soc_pcm_stream *stream,
1532 u64 formats)
1533 {
1534 runtime->hw.rate_min = stream->rate_min;
1535 runtime->hw.rate_max = stream->rate_max;
1536 runtime->hw.channels_min = stream->channels_min;
1537 runtime->hw.channels_max = stream->channels_max;
1538 if (runtime->hw.formats)
1539 runtime->hw.formats &= formats & stream->formats;
1540 else
1541 runtime->hw.formats = formats & stream->formats;
1542 runtime->hw.rates = stream->rates;
1543 }
1544
1545 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1546 {
1547 struct snd_soc_pcm_runtime *fe = substream->private_data;
1548 struct snd_soc_dpcm *dpcm;
1549 u64 formats = ULLONG_MAX;
1550 int stream = substream->stream;
1551
1552 if (!fe->dai_link->dpcm_merged_format)
1553 return formats;
1554
1555 /*
1556 * It returns merged BE codec format
1557 * if FE want to use it (= dpcm_merged_format)
1558 */
1559
1560 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1561 struct snd_soc_pcm_runtime *be = dpcm->be;
1562 struct snd_soc_dai_driver *codec_dai_drv;
1563 struct snd_soc_pcm_stream *codec_stream;
1564 int i;
1565
1566 for (i = 0; i < be->num_codecs; i++) {
1567 codec_dai_drv = be->codec_dais[i]->driver;
1568 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1569 codec_stream = &codec_dai_drv->playback;
1570 else
1571 codec_stream = &codec_dai_drv->capture;
1572
1573 formats &= codec_stream->formats;
1574 }
1575 }
1576
1577 return formats;
1578 }
1579
1580 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1581 {
1582 struct snd_pcm_runtime *runtime = substream->runtime;
1583 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1584 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1585 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1586 u64 format = dpcm_runtime_base_format(substream);
1587
1588 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1589 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1590 else
1591 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1592 }
1593
1594 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1595
1596 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1597 * for avoiding the race with trigger callback.
1598 * If the state is unset and a trigger is pending while the previous operation,
1599 * process the pending trigger action here.
1600 */
1601 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1602 int stream, enum snd_soc_dpcm_update state)
1603 {
1604 struct snd_pcm_substream *substream =
1605 snd_soc_dpcm_get_substream(fe, stream);
1606
1607 snd_pcm_stream_lock_irq(substream);
1608 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1609 dpcm_fe_dai_do_trigger(substream,
1610 fe->dpcm[stream].trigger_pending - 1);
1611 fe->dpcm[stream].trigger_pending = 0;
1612 }
1613 fe->dpcm[stream].runtime_update = state;
1614 snd_pcm_stream_unlock_irq(substream);
1615 }
1616
1617 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1618 {
1619 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1620 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1621 int stream = fe_substream->stream, ret = 0;
1622
1623 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1624
1625 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1626 if (ret < 0) {
1627 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1628 goto be_err;
1629 }
1630
1631 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1632
1633 /* start the DAI frontend */
1634 ret = soc_pcm_open(fe_substream);
1635 if (ret < 0) {
1636 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1637 goto unwind;
1638 }
1639
1640 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1641
1642 dpcm_set_fe_runtime(fe_substream);
1643 snd_pcm_limit_hw_rates(runtime);
1644
1645 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1646 return 0;
1647
1648 unwind:
1649 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1650 be_err:
1651 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1652 return ret;
1653 }
1654
1655 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1656 {
1657 struct snd_soc_dpcm *dpcm;
1658
1659 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1660 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1661
1662 struct snd_soc_pcm_runtime *be = dpcm->be;
1663 struct snd_pcm_substream *be_substream =
1664 snd_soc_dpcm_get_substream(be, stream);
1665
1666 /* is this op for this BE ? */
1667 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1668 continue;
1669
1670 if (be->dpcm[stream].users == 0)
1671 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1672 stream ? "capture" : "playback",
1673 be->dpcm[stream].state);
1674
1675 if (--be->dpcm[stream].users != 0)
1676 continue;
1677
1678 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1679 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1680 continue;
1681
1682 dev_dbg(be->dev, "ASoC: close BE %s\n",
1683 dpcm->fe->dai_link->name);
1684
1685 soc_pcm_close(be_substream);
1686 be_substream->runtime = NULL;
1687
1688 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1689 }
1690 return 0;
1691 }
1692
1693 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1694 {
1695 struct snd_soc_pcm_runtime *fe = substream->private_data;
1696 int stream = substream->stream;
1697
1698 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1699
1700 /* shutdown the BEs */
1701 dpcm_be_dai_shutdown(fe, substream->stream);
1702
1703 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1704
1705 /* now shutdown the frontend */
1706 soc_pcm_close(substream);
1707
1708 /* run the stream event for each BE */
1709 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1710
1711 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1712 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1713 return 0;
1714 }
1715
1716 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1717 {
1718 struct snd_soc_dpcm *dpcm;
1719
1720 /* only hw_params backends that are either sinks or sources
1721 * to this frontend DAI */
1722 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1723
1724 struct snd_soc_pcm_runtime *be = dpcm->be;
1725 struct snd_pcm_substream *be_substream =
1726 snd_soc_dpcm_get_substream(be, stream);
1727
1728 /* is this op for this BE ? */
1729 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1730 continue;
1731
1732 /* only free hw when no longer used - check all FEs */
1733 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1734 continue;
1735
1736 /* do not free hw if this BE is used by other FE */
1737 if (be->dpcm[stream].users > 1)
1738 continue;
1739
1740 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1741 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1742 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1743 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1744 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1745 continue;
1746
1747 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1748 dpcm->fe->dai_link->name);
1749
1750 soc_pcm_hw_free(be_substream);
1751
1752 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1753 }
1754
1755 return 0;
1756 }
1757
1758 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1759 {
1760 struct snd_soc_pcm_runtime *fe = substream->private_data;
1761 int err, stream = substream->stream;
1762
1763 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1764 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1765
1766 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1767
1768 /* call hw_free on the frontend */
1769 err = soc_pcm_hw_free(substream);
1770 if (err < 0)
1771 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1772 fe->dai_link->name);
1773
1774 /* only hw_params backends that are either sinks or sources
1775 * to this frontend DAI */
1776 err = dpcm_be_dai_hw_free(fe, stream);
1777
1778 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1779 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1780
1781 mutex_unlock(&fe->card->mutex);
1782 return 0;
1783 }
1784
1785 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1786 {
1787 struct snd_soc_dpcm *dpcm;
1788 int ret;
1789
1790 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1791
1792 struct snd_soc_pcm_runtime *be = dpcm->be;
1793 struct snd_pcm_substream *be_substream =
1794 snd_soc_dpcm_get_substream(be, stream);
1795
1796 /* is this op for this BE ? */
1797 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1798 continue;
1799
1800 /* only allow hw_params() if no connected FEs are running */
1801 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1802 continue;
1803
1804 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1805 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1806 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1807 continue;
1808
1809 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1810 dpcm->fe->dai_link->name);
1811
1812 /* copy params for each dpcm */
1813 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1814 sizeof(struct snd_pcm_hw_params));
1815
1816 /* perform any hw_params fixups */
1817 if (be->dai_link->be_hw_params_fixup) {
1818 ret = be->dai_link->be_hw_params_fixup(be,
1819 &dpcm->hw_params);
1820 if (ret < 0) {
1821 dev_err(be->dev,
1822 "ASoC: hw_params BE fixup failed %d\n",
1823 ret);
1824 goto unwind;
1825 }
1826 }
1827
1828 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1829 if (ret < 0) {
1830 dev_err(dpcm->be->dev,
1831 "ASoC: hw_params BE failed %d\n", ret);
1832 goto unwind;
1833 }
1834
1835 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1836 }
1837 return 0;
1838
1839 unwind:
1840 /* disable any enabled and non active backends */
1841 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1842 struct snd_soc_pcm_runtime *be = dpcm->be;
1843 struct snd_pcm_substream *be_substream =
1844 snd_soc_dpcm_get_substream(be, stream);
1845
1846 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1847 continue;
1848
1849 /* only allow hw_free() if no connected FEs are running */
1850 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1851 continue;
1852
1853 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1854 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1855 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1856 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1857 continue;
1858
1859 soc_pcm_hw_free(be_substream);
1860 }
1861
1862 return ret;
1863 }
1864
1865 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1866 struct snd_pcm_hw_params *params)
1867 {
1868 struct snd_soc_pcm_runtime *fe = substream->private_data;
1869 int ret, stream = substream->stream;
1870
1871 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1872 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1873
1874 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1875 sizeof(struct snd_pcm_hw_params));
1876 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1877 if (ret < 0) {
1878 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1879 goto out;
1880 }
1881
1882 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1883 fe->dai_link->name, params_rate(params),
1884 params_channels(params), params_format(params));
1885
1886 /* call hw_params on the frontend */
1887 ret = soc_pcm_hw_params(substream, params);
1888 if (ret < 0) {
1889 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1890 dpcm_be_dai_hw_free(fe, stream);
1891 } else
1892 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1893
1894 out:
1895 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1896 mutex_unlock(&fe->card->mutex);
1897 return ret;
1898 }
1899
1900 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1901 struct snd_pcm_substream *substream, int cmd)
1902 {
1903 int ret;
1904
1905 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1906 dpcm->fe->dai_link->name, cmd);
1907
1908 ret = soc_pcm_trigger(substream, cmd);
1909 if (ret < 0)
1910 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1911
1912 return ret;
1913 }
1914
1915 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1916 int cmd)
1917 {
1918 struct snd_soc_dpcm *dpcm;
1919 int ret = 0;
1920
1921 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1922
1923 struct snd_soc_pcm_runtime *be = dpcm->be;
1924 struct snd_pcm_substream *be_substream =
1925 snd_soc_dpcm_get_substream(be, stream);
1926
1927 /* is this op for this BE ? */
1928 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1929 continue;
1930
1931 switch (cmd) {
1932 case SNDRV_PCM_TRIGGER_START:
1933 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1935 continue;
1936
1937 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1938 if (ret)
1939 return ret;
1940
1941 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1942 break;
1943 case SNDRV_PCM_TRIGGER_RESUME:
1944 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1945 continue;
1946
1947 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1948 if (ret)
1949 return ret;
1950
1951 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1952 break;
1953 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1954 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1955 continue;
1956
1957 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1958 if (ret)
1959 return ret;
1960
1961 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1962 break;
1963 case SNDRV_PCM_TRIGGER_STOP:
1964 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1965 continue;
1966
1967 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1968 continue;
1969
1970 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1971 if (ret)
1972 return ret;
1973
1974 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1975 break;
1976 case SNDRV_PCM_TRIGGER_SUSPEND:
1977 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1978 continue;
1979
1980 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1981 continue;
1982
1983 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1984 if (ret)
1985 return ret;
1986
1987 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1988 break;
1989 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1990 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1991 continue;
1992
1993 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1994 continue;
1995
1996 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1997 if (ret)
1998 return ret;
1999
2000 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2001 break;
2002 }
2003 }
2004
2005 return ret;
2006 }
2007 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2008
2009 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2010 {
2011 struct snd_soc_pcm_runtime *fe = substream->private_data;
2012 int stream = substream->stream, ret;
2013 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2014
2015 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2016
2017 switch (trigger) {
2018 case SND_SOC_DPCM_TRIGGER_PRE:
2019 /* call trigger on the frontend before the backend. */
2020
2021 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2022 fe->dai_link->name, cmd);
2023
2024 ret = soc_pcm_trigger(substream, cmd);
2025 if (ret < 0) {
2026 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2027 goto out;
2028 }
2029
2030 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2031 break;
2032 case SND_SOC_DPCM_TRIGGER_POST:
2033 /* call trigger on the frontend after the backend. */
2034
2035 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2036 if (ret < 0) {
2037 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2038 goto out;
2039 }
2040
2041 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2042 fe->dai_link->name, cmd);
2043
2044 ret = soc_pcm_trigger(substream, cmd);
2045 break;
2046 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2047 /* bespoke trigger() - handles both FE and BEs */
2048
2049 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2050 fe->dai_link->name, cmd);
2051
2052 ret = soc_pcm_bespoke_trigger(substream, cmd);
2053 if (ret < 0) {
2054 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2055 goto out;
2056 }
2057 break;
2058 default:
2059 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2060 fe->dai_link->name);
2061 ret = -EINVAL;
2062 goto out;
2063 }
2064
2065 switch (cmd) {
2066 case SNDRV_PCM_TRIGGER_START:
2067 case SNDRV_PCM_TRIGGER_RESUME:
2068 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2069 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2070 break;
2071 case SNDRV_PCM_TRIGGER_STOP:
2072 case SNDRV_PCM_TRIGGER_SUSPEND:
2073 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2074 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2075 break;
2076 }
2077
2078 out:
2079 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2080 return ret;
2081 }
2082
2083 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2084 {
2085 struct snd_soc_pcm_runtime *fe = substream->private_data;
2086 int stream = substream->stream;
2087
2088 /* if FE's runtime_update is already set, we're in race;
2089 * process this trigger later at exit
2090 */
2091 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2092 fe->dpcm[stream].trigger_pending = cmd + 1;
2093 return 0; /* delayed, assuming it's successful */
2094 }
2095
2096 /* we're alone, let's trigger */
2097 return dpcm_fe_dai_do_trigger(substream, cmd);
2098 }
2099
2100 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2101 {
2102 struct snd_soc_dpcm *dpcm;
2103 int ret = 0;
2104
2105 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2106
2107 struct snd_soc_pcm_runtime *be = dpcm->be;
2108 struct snd_pcm_substream *be_substream =
2109 snd_soc_dpcm_get_substream(be, stream);
2110
2111 /* is this op for this BE ? */
2112 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2113 continue;
2114
2115 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2116 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2117 continue;
2118
2119 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2120 dpcm->fe->dai_link->name);
2121
2122 ret = soc_pcm_prepare(be_substream);
2123 if (ret < 0) {
2124 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2125 ret);
2126 break;
2127 }
2128
2129 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2130 }
2131 return ret;
2132 }
2133
2134 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2135 {
2136 struct snd_soc_pcm_runtime *fe = substream->private_data;
2137 int stream = substream->stream, ret = 0;
2138
2139 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2140
2141 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2142
2143 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2144
2145 /* there is no point preparing this FE if there are no BEs */
2146 if (list_empty(&fe->dpcm[stream].be_clients)) {
2147 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2148 fe->dai_link->name);
2149 ret = -EINVAL;
2150 goto out;
2151 }
2152
2153 ret = dpcm_be_dai_prepare(fe, substream->stream);
2154 if (ret < 0)
2155 goto out;
2156
2157 /* call prepare on the frontend */
2158 ret = soc_pcm_prepare(substream);
2159 if (ret < 0) {
2160 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2161 fe->dai_link->name);
2162 goto out;
2163 }
2164
2165 /* run the stream event for each BE */
2166 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2167 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2168
2169 out:
2170 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2171 mutex_unlock(&fe->card->mutex);
2172
2173 return ret;
2174 }
2175
2176 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2177 unsigned int cmd, void *arg)
2178 {
2179 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2180 struct snd_soc_platform *platform = rtd->platform;
2181
2182 if (platform->driver->ops && platform->driver->ops->ioctl)
2183 return platform->driver->ops->ioctl(substream, cmd, arg);
2184 return snd_pcm_lib_ioctl(substream, cmd, arg);
2185 }
2186
2187 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2188 {
2189 struct snd_pcm_substream *substream =
2190 snd_soc_dpcm_get_substream(fe, stream);
2191 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2192 int err;
2193
2194 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2195 stream ? "capture" : "playback", fe->dai_link->name);
2196
2197 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2198 /* call bespoke trigger - FE takes care of all BE triggers */
2199 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2200 fe->dai_link->name);
2201
2202 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2203 if (err < 0)
2204 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2205 } else {
2206 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2207 fe->dai_link->name);
2208
2209 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2210 if (err < 0)
2211 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2212 }
2213
2214 err = dpcm_be_dai_hw_free(fe, stream);
2215 if (err < 0)
2216 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2217
2218 err = dpcm_be_dai_shutdown(fe, stream);
2219 if (err < 0)
2220 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2221
2222 /* run the stream event for each BE */
2223 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2224
2225 return 0;
2226 }
2227
2228 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2229 {
2230 struct snd_pcm_substream *substream =
2231 snd_soc_dpcm_get_substream(fe, stream);
2232 struct snd_soc_dpcm *dpcm;
2233 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2234 int ret;
2235
2236 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2237 stream ? "capture" : "playback", fe->dai_link->name);
2238
2239 /* Only start the BE if the FE is ready */
2240 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2241 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2242 return -EINVAL;
2243
2244 /* startup must always be called for new BEs */
2245 ret = dpcm_be_dai_startup(fe, stream);
2246 if (ret < 0)
2247 goto disconnect;
2248
2249 /* keep going if FE state is > open */
2250 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2251 return 0;
2252
2253 ret = dpcm_be_dai_hw_params(fe, stream);
2254 if (ret < 0)
2255 goto close;
2256
2257 /* keep going if FE state is > hw_params */
2258 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2259 return 0;
2260
2261
2262 ret = dpcm_be_dai_prepare(fe, stream);
2263 if (ret < 0)
2264 goto hw_free;
2265
2266 /* run the stream event for each BE */
2267 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2268
2269 /* keep going if FE state is > prepare */
2270 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2271 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2272 return 0;
2273
2274 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2275 /* call trigger on the frontend - FE takes care of all BE triggers */
2276 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2277 fe->dai_link->name);
2278
2279 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2280 if (ret < 0) {
2281 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2282 goto hw_free;
2283 }
2284 } else {
2285 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2286 fe->dai_link->name);
2287
2288 ret = dpcm_be_dai_trigger(fe, stream,
2289 SNDRV_PCM_TRIGGER_START);
2290 if (ret < 0) {
2291 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2292 goto hw_free;
2293 }
2294 }
2295
2296 return 0;
2297
2298 hw_free:
2299 dpcm_be_dai_hw_free(fe, stream);
2300 close:
2301 dpcm_be_dai_shutdown(fe, stream);
2302 disconnect:
2303 /* disconnect any non started BEs */
2304 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2305 struct snd_soc_pcm_runtime *be = dpcm->be;
2306 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2307 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2308 }
2309
2310 return ret;
2311 }
2312
2313 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2314 {
2315 int ret;
2316
2317 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2318 ret = dpcm_run_update_startup(fe, stream);
2319 if (ret < 0)
2320 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2321 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2322
2323 return ret;
2324 }
2325
2326 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2327 {
2328 int ret;
2329
2330 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2331 ret = dpcm_run_update_shutdown(fe, stream);
2332 if (ret < 0)
2333 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2334 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2335
2336 return ret;
2337 }
2338
2339 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2340 * any DAI links.
2341 */
2342 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2343 {
2344 struct snd_soc_pcm_runtime *fe;
2345 int old, new, paths;
2346
2347 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2348 list_for_each_entry(fe, &card->rtd_list, list) {
2349 struct snd_soc_dapm_widget_list *list;
2350
2351 /* make sure link is FE */
2352 if (!fe->dai_link->dynamic)
2353 continue;
2354
2355 /* only check active links */
2356 if (!fe->cpu_dai->active)
2357 continue;
2358
2359 /* DAPM sync will call this to update DSP paths */
2360 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2361 fe->dai_link->name);
2362
2363 /* skip if FE doesn't have playback capability */
2364 if (!fe->cpu_dai->driver->playback.channels_min
2365 || !fe->codec_dai->driver->playback.channels_min)
2366 goto capture;
2367
2368 /* skip if FE isn't currently playing */
2369 if (!fe->cpu_dai->playback_active
2370 || !fe->codec_dai->playback_active)
2371 goto capture;
2372
2373 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2374 if (paths < 0) {
2375 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2376 fe->dai_link->name, "playback");
2377 mutex_unlock(&card->mutex);
2378 return paths;
2379 }
2380
2381 /* update any new playback paths */
2382 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2383 if (new) {
2384 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2385 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2386 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2387 }
2388
2389 /* update any old playback paths */
2390 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2391 if (old) {
2392 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2393 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2394 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2395 }
2396
2397 dpcm_path_put(&list);
2398 capture:
2399 /* skip if FE doesn't have capture capability */
2400 if (!fe->cpu_dai->driver->capture.channels_min
2401 || !fe->codec_dai->driver->capture.channels_min)
2402 continue;
2403
2404 /* skip if FE isn't currently capturing */
2405 if (!fe->cpu_dai->capture_active
2406 || !fe->codec_dai->capture_active)
2407 continue;
2408
2409 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2410 if (paths < 0) {
2411 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2412 fe->dai_link->name, "capture");
2413 mutex_unlock(&card->mutex);
2414 return paths;
2415 }
2416
2417 /* update any new capture paths */
2418 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2419 if (new) {
2420 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2421 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2422 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2423 }
2424
2425 /* update any old capture paths */
2426 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2427 if (old) {
2428 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2429 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2430 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2431 }
2432
2433 dpcm_path_put(&list);
2434 }
2435
2436 mutex_unlock(&card->mutex);
2437 return 0;
2438 }
2439 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2440 {
2441 struct snd_soc_dpcm *dpcm;
2442 struct list_head *clients =
2443 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2444
2445 list_for_each_entry(dpcm, clients, list_be) {
2446
2447 struct snd_soc_pcm_runtime *be = dpcm->be;
2448 int i;
2449
2450 if (be->dai_link->ignore_suspend)
2451 continue;
2452
2453 for (i = 0; i < be->num_codecs; i++) {
2454 struct snd_soc_dai *dai = be->codec_dais[i];
2455 struct snd_soc_dai_driver *drv = dai->driver;
2456
2457 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2458 be->dai_link->name);
2459
2460 if (drv->ops && drv->ops->digital_mute &&
2461 dai->playback_active)
2462 drv->ops->digital_mute(dai, mute);
2463 }
2464 }
2465
2466 return 0;
2467 }
2468
2469 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2470 {
2471 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2472 struct snd_soc_dpcm *dpcm;
2473 struct snd_soc_dapm_widget_list *list;
2474 int ret;
2475 int stream = fe_substream->stream;
2476
2477 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2478 fe->dpcm[stream].runtime = fe_substream->runtime;
2479
2480 ret = dpcm_path_get(fe, stream, &list);
2481 if (ret < 0) {
2482 mutex_unlock(&fe->card->mutex);
2483 return ret;
2484 } else if (ret == 0) {
2485 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2486 fe->dai_link->name, stream ? "capture" : "playback");
2487 }
2488
2489 /* calculate valid and active FE <-> BE dpcms */
2490 dpcm_process_paths(fe, stream, &list, 1);
2491
2492 ret = dpcm_fe_dai_startup(fe_substream);
2493 if (ret < 0) {
2494 /* clean up all links */
2495 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2496 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2497
2498 dpcm_be_disconnect(fe, stream);
2499 fe->dpcm[stream].runtime = NULL;
2500 }
2501
2502 dpcm_clear_pending_state(fe, stream);
2503 dpcm_path_put(&list);
2504 mutex_unlock(&fe->card->mutex);
2505 return ret;
2506 }
2507
2508 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2509 {
2510 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2511 struct snd_soc_dpcm *dpcm;
2512 int stream = fe_substream->stream, ret;
2513
2514 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2515 ret = dpcm_fe_dai_shutdown(fe_substream);
2516
2517 /* mark FE's links ready to prune */
2518 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2519 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2520
2521 dpcm_be_disconnect(fe, stream);
2522
2523 fe->dpcm[stream].runtime = NULL;
2524 mutex_unlock(&fe->card->mutex);
2525 return ret;
2526 }
2527
2528 /* create a new pcm */
2529 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2530 {
2531 struct snd_soc_platform *platform = rtd->platform;
2532 struct snd_soc_dai *codec_dai;
2533 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2534 struct snd_pcm *pcm;
2535 char new_name[64];
2536 int ret = 0, playback = 0, capture = 0;
2537 int i;
2538
2539 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2540 playback = rtd->dai_link->dpcm_playback;
2541 capture = rtd->dai_link->dpcm_capture;
2542 } else {
2543 for (i = 0; i < rtd->num_codecs; i++) {
2544 codec_dai = rtd->codec_dais[i];
2545 if (codec_dai->driver->playback.channels_min)
2546 playback = 1;
2547 if (codec_dai->driver->capture.channels_min)
2548 capture = 1;
2549 }
2550
2551 capture = capture && cpu_dai->driver->capture.channels_min;
2552 playback = playback && cpu_dai->driver->playback.channels_min;
2553 }
2554
2555 if (rtd->dai_link->playback_only) {
2556 playback = 1;
2557 capture = 0;
2558 }
2559
2560 if (rtd->dai_link->capture_only) {
2561 playback = 0;
2562 capture = 1;
2563 }
2564
2565 /* create the PCM */
2566 if (rtd->dai_link->no_pcm) {
2567 snprintf(new_name, sizeof(new_name), "(%s)",
2568 rtd->dai_link->stream_name);
2569
2570 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2571 playback, capture, &pcm);
2572 } else {
2573 if (rtd->dai_link->dynamic)
2574 snprintf(new_name, sizeof(new_name), "%s (*)",
2575 rtd->dai_link->stream_name);
2576 else
2577 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2578 rtd->dai_link->stream_name,
2579 (rtd->num_codecs > 1) ?
2580 "multicodec" : rtd->codec_dai->name, num);
2581
2582 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2583 capture, &pcm);
2584 }
2585 if (ret < 0) {
2586 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2587 rtd->dai_link->name);
2588 return ret;
2589 }
2590 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2591
2592 /* DAPM dai link stream work */
2593 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2594
2595 pcm->nonatomic = rtd->dai_link->nonatomic;
2596 rtd->pcm = pcm;
2597 pcm->private_data = rtd;
2598
2599 if (rtd->dai_link->no_pcm) {
2600 if (playback)
2601 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2602 if (capture)
2603 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2604 goto out;
2605 }
2606
2607 /* ASoC PCM operations */
2608 if (rtd->dai_link->dynamic) {
2609 rtd->ops.open = dpcm_fe_dai_open;
2610 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2611 rtd->ops.prepare = dpcm_fe_dai_prepare;
2612 rtd->ops.trigger = dpcm_fe_dai_trigger;
2613 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2614 rtd->ops.close = dpcm_fe_dai_close;
2615 rtd->ops.pointer = soc_pcm_pointer;
2616 rtd->ops.ioctl = soc_pcm_ioctl;
2617 } else {
2618 rtd->ops.open = soc_pcm_open;
2619 rtd->ops.hw_params = soc_pcm_hw_params;
2620 rtd->ops.prepare = soc_pcm_prepare;
2621 rtd->ops.trigger = soc_pcm_trigger;
2622 rtd->ops.hw_free = soc_pcm_hw_free;
2623 rtd->ops.close = soc_pcm_close;
2624 rtd->ops.pointer = soc_pcm_pointer;
2625 rtd->ops.ioctl = soc_pcm_ioctl;
2626 }
2627
2628 if (platform->driver->ops) {
2629 rtd->ops.ack = platform->driver->ops->ack;
2630 rtd->ops.copy = platform->driver->ops->copy;
2631 rtd->ops.silence = platform->driver->ops->silence;
2632 rtd->ops.page = platform->driver->ops->page;
2633 rtd->ops.mmap = platform->driver->ops->mmap;
2634 }
2635
2636 if (playback)
2637 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2638
2639 if (capture)
2640 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2641
2642 if (platform->driver->pcm_new) {
2643 ret = platform->driver->pcm_new(rtd);
2644 if (ret < 0) {
2645 dev_err(platform->dev,
2646 "ASoC: pcm constructor failed: %d\n",
2647 ret);
2648 return ret;
2649 }
2650 }
2651
2652 pcm->private_free = platform->driver->pcm_free;
2653 out:
2654 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2655 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2656 cpu_dai->name);
2657 return ret;
2658 }
2659
2660 /* is the current PCM operation for this FE ? */
2661 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2662 {
2663 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2664 return 1;
2665 return 0;
2666 }
2667 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2668
2669 /* is the current PCM operation for this BE ? */
2670 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2671 struct snd_soc_pcm_runtime *be, int stream)
2672 {
2673 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2674 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2675 be->dpcm[stream].runtime_update))
2676 return 1;
2677 return 0;
2678 }
2679 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2680
2681 /* get the substream for this BE */
2682 struct snd_pcm_substream *
2683 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2684 {
2685 return be->pcm->streams[stream].substream;
2686 }
2687 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2688
2689 /* get the BE runtime state */
2690 enum snd_soc_dpcm_state
2691 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2692 {
2693 return be->dpcm[stream].state;
2694 }
2695 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2696
2697 /* set the BE runtime state */
2698 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2699 int stream, enum snd_soc_dpcm_state state)
2700 {
2701 be->dpcm[stream].state = state;
2702 }
2703 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2704
2705 /*
2706 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2707 * are not running, paused or suspended for the specified stream direction.
2708 */
2709 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2710 struct snd_soc_pcm_runtime *be, int stream)
2711 {
2712 struct snd_soc_dpcm *dpcm;
2713 int state;
2714
2715 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2716
2717 if (dpcm->fe == fe)
2718 continue;
2719
2720 state = dpcm->fe->dpcm[stream].state;
2721 if (state == SND_SOC_DPCM_STATE_START ||
2722 state == SND_SOC_DPCM_STATE_PAUSED ||
2723 state == SND_SOC_DPCM_STATE_SUSPEND)
2724 return 0;
2725 }
2726
2727 /* it's safe to free/stop this BE DAI */
2728 return 1;
2729 }
2730 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2731
2732 /*
2733 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2734 * running, paused or suspended for the specified stream direction.
2735 */
2736 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2737 struct snd_soc_pcm_runtime *be, int stream)
2738 {
2739 struct snd_soc_dpcm *dpcm;
2740 int state;
2741
2742 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2743
2744 if (dpcm->fe == fe)
2745 continue;
2746
2747 state = dpcm->fe->dpcm[stream].state;
2748 if (state == SND_SOC_DPCM_STATE_START ||
2749 state == SND_SOC_DPCM_STATE_PAUSED ||
2750 state == SND_SOC_DPCM_STATE_SUSPEND ||
2751 state == SND_SOC_DPCM_STATE_PREPARE)
2752 return 0;
2753 }
2754
2755 /* it's safe to change hw_params */
2756 return 1;
2757 }
2758 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2759
2760 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2761 int cmd, struct snd_soc_platform *platform)
2762 {
2763 if (platform->driver->ops && platform->driver->ops->trigger)
2764 return platform->driver->ops->trigger(substream, cmd);
2765 return 0;
2766 }
2767 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2768
2769 #ifdef CONFIG_DEBUG_FS
2770 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2771 {
2772 switch (state) {
2773 case SND_SOC_DPCM_STATE_NEW:
2774 return "new";
2775 case SND_SOC_DPCM_STATE_OPEN:
2776 return "open";
2777 case SND_SOC_DPCM_STATE_HW_PARAMS:
2778 return "hw_params";
2779 case SND_SOC_DPCM_STATE_PREPARE:
2780 return "prepare";
2781 case SND_SOC_DPCM_STATE_START:
2782 return "start";
2783 case SND_SOC_DPCM_STATE_STOP:
2784 return "stop";
2785 case SND_SOC_DPCM_STATE_SUSPEND:
2786 return "suspend";
2787 case SND_SOC_DPCM_STATE_PAUSED:
2788 return "paused";
2789 case SND_SOC_DPCM_STATE_HW_FREE:
2790 return "hw_free";
2791 case SND_SOC_DPCM_STATE_CLOSE:
2792 return "close";
2793 }
2794
2795 return "unknown";
2796 }
2797
2798 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2799 int stream, char *buf, size_t size)
2800 {
2801 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2802 struct snd_soc_dpcm *dpcm;
2803 ssize_t offset = 0;
2804
2805 /* FE state */
2806 offset += snprintf(buf + offset, size - offset,
2807 "[%s - %s]\n", fe->dai_link->name,
2808 stream ? "Capture" : "Playback");
2809
2810 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2811 dpcm_state_string(fe->dpcm[stream].state));
2812
2813 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2814 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2815 offset += snprintf(buf + offset, size - offset,
2816 "Hardware Params: "
2817 "Format = %s, Channels = %d, Rate = %d\n",
2818 snd_pcm_format_name(params_format(params)),
2819 params_channels(params),
2820 params_rate(params));
2821
2822 /* BEs state */
2823 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2824
2825 if (list_empty(&fe->dpcm[stream].be_clients)) {
2826 offset += snprintf(buf + offset, size - offset,
2827 " No active DSP links\n");
2828 goto out;
2829 }
2830
2831 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2832 struct snd_soc_pcm_runtime *be = dpcm->be;
2833 params = &dpcm->hw_params;
2834
2835 offset += snprintf(buf + offset, size - offset,
2836 "- %s\n", be->dai_link->name);
2837
2838 offset += snprintf(buf + offset, size - offset,
2839 " State: %s\n",
2840 dpcm_state_string(be->dpcm[stream].state));
2841
2842 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2843 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2844 offset += snprintf(buf + offset, size - offset,
2845 " Hardware Params: "
2846 "Format = %s, Channels = %d, Rate = %d\n",
2847 snd_pcm_format_name(params_format(params)),
2848 params_channels(params),
2849 params_rate(params));
2850 }
2851
2852 out:
2853 return offset;
2854 }
2855
2856 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2857 size_t count, loff_t *ppos)
2858 {
2859 struct snd_soc_pcm_runtime *fe = file->private_data;
2860 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2861 char *buf;
2862
2863 buf = kmalloc(out_count, GFP_KERNEL);
2864 if (!buf)
2865 return -ENOMEM;
2866
2867 if (fe->cpu_dai->driver->playback.channels_min)
2868 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2869 buf + offset, out_count - offset);
2870
2871 if (fe->cpu_dai->driver->capture.channels_min)
2872 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2873 buf + offset, out_count - offset);
2874
2875 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2876
2877 kfree(buf);
2878 return ret;
2879 }
2880
2881 static const struct file_operations dpcm_state_fops = {
2882 .open = simple_open,
2883 .read = dpcm_state_read_file,
2884 .llseek = default_llseek,
2885 };
2886
2887 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2888 {
2889 if (!rtd->dai_link)
2890 return;
2891
2892 if (!rtd->card->debugfs_card_root)
2893 return;
2894
2895 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2896 rtd->card->debugfs_card_root);
2897 if (!rtd->debugfs_dpcm_root) {
2898 dev_dbg(rtd->dev,
2899 "ASoC: Failed to create dpcm debugfs directory %s\n",
2900 rtd->dai_link->name);
2901 return;
2902 }
2903
2904 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2905 rtd->debugfs_dpcm_root,
2906 rtd, &dpcm_state_fops);
2907 }
2908 #endif
Linux kernel - Deliverables
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