projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branches 'fixes', 'next/cleanup', 'next/defconfig' and 'next/soc' into for...
[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_mark_last_busy(platform->dev);
603 pm_runtime_put_autosuspend(platform->dev);
604 for (i = 0; i < rtd->num_codecs; i++) {
605 pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev);
606 pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev);
607 }
608
609 pm_runtime_mark_last_busy(cpu_dai->dev);
610 pm_runtime_put_autosuspend(cpu_dai->dev);
611 for (i = 0; i < rtd->num_codecs; i++) {
612 if (!rtd->codec_dais[i]->active)
613 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
614 }
615 if (!cpu_dai->active)
616 pinctrl_pm_select_sleep_state(cpu_dai->dev);
617
618 return ret;
619 }
620
621 /*
622 * Power down the audio subsystem pmdown_time msecs after close is called.
623 * This is to ensure there are no pops or clicks in between any music tracks
624 * due to DAPM power cycling.
625 */
626 static void close_delayed_work(struct work_struct *work)
627 {
628 struct snd_soc_pcm_runtime *rtd =
629 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
630 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
631
632 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
633
634 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
635 codec_dai->driver->playback.stream_name,
636 codec_dai->playback_active ? "active" : "inactive",
637 rtd->pop_wait ? "yes" : "no");
638
639 /* are we waiting on this codec DAI stream */
640 if (rtd->pop_wait == 1) {
641 rtd->pop_wait = 0;
642 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
643 SND_SOC_DAPM_STREAM_STOP);
644 }
645
646 mutex_unlock(&rtd->pcm_mutex);
647 }
648
649 /*
650 * Called by ALSA when a PCM substream is closed. Private data can be
651 * freed here. The cpu DAI, codec DAI, machine and platform are also
652 * shutdown.
653 */
654 static int soc_pcm_close(struct snd_pcm_substream *substream)
655 {
656 struct snd_soc_pcm_runtime *rtd = substream->private_data;
657 struct snd_soc_platform *platform = rtd->platform;
658 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
659 struct snd_soc_dai *codec_dai;
660 int i;
661
662 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
663
664 snd_soc_runtime_deactivate(rtd, substream->stream);
665
666 /* clear the corresponding DAIs rate when inactive */
667 if (!cpu_dai->active)
668 cpu_dai->rate = 0;
669
670 for (i = 0; i < rtd->num_codecs; i++) {
671 codec_dai = rtd->codec_dais[i];
672 if (!codec_dai->active)
673 codec_dai->rate = 0;
674 }
675
676 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
677
678 if (cpu_dai->driver->ops->shutdown)
679 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
680
681 for (i = 0; i < rtd->num_codecs; i++) {
682 codec_dai = rtd->codec_dais[i];
683 if (codec_dai->driver->ops->shutdown)
684 codec_dai->driver->ops->shutdown(substream, codec_dai);
685 }
686
687 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
688 rtd->dai_link->ops->shutdown(substream);
689
690 if (platform->driver->ops && platform->driver->ops->close)
691 platform->driver->ops->close(substream);
692
693 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
694 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
695 /* powered down playback stream now */
696 snd_soc_dapm_stream_event(rtd,
697 SNDRV_PCM_STREAM_PLAYBACK,
698 SND_SOC_DAPM_STREAM_STOP);
699 } else {
700 /* start delayed pop wq here for playback streams */
701 rtd->pop_wait = 1;
702 queue_delayed_work(system_power_efficient_wq,
703 &rtd->delayed_work,
704 msecs_to_jiffies(rtd->pmdown_time));
705 }
706 } else {
707 /* capture streams can be powered down now */
708 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
709 SND_SOC_DAPM_STREAM_STOP);
710 }
711
712 mutex_unlock(&rtd->pcm_mutex);
713
714 pm_runtime_mark_last_busy(platform->dev);
715 pm_runtime_put_autosuspend(platform->dev);
716
717 for (i = 0; i < rtd->num_codecs; i++) {
718 pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev);
719 pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev);
720 }
721
722 pm_runtime_mark_last_busy(cpu_dai->dev);
723 pm_runtime_put_autosuspend(cpu_dai->dev);
724
725 for (i = 0; i < rtd->num_codecs; i++) {
726 if (!rtd->codec_dais[i]->active)
727 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
728 }
729 if (!cpu_dai->active)
730 pinctrl_pm_select_sleep_state(cpu_dai->dev);
731
732 return 0;
733 }
734
735 /*
736 * Called by ALSA when the PCM substream is prepared, can set format, sample
737 * rate, etc. This function is non atomic and can be called multiple times,
738 * it can refer to the runtime info.
739 */
740 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
741 {
742 struct snd_soc_pcm_runtime *rtd = substream->private_data;
743 struct snd_soc_platform *platform = rtd->platform;
744 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745 struct snd_soc_dai *codec_dai;
746 int i, ret = 0;
747
748 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
749
750 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
751 ret = rtd->dai_link->ops->prepare(substream);
752 if (ret < 0) {
753 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
754 " %d\n", ret);
755 goto out;
756 }
757 }
758
759 if (platform->driver->ops && platform->driver->ops->prepare) {
760 ret = platform->driver->ops->prepare(substream);
761 if (ret < 0) {
762 dev_err(platform->dev, "ASoC: platform prepare error:"
763 " %d\n", ret);
764 goto out;
765 }
766 }
767
768 for (i = 0; i < rtd->num_codecs; i++) {
769 codec_dai = rtd->codec_dais[i];
770 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
771 ret = codec_dai->driver->ops->prepare(substream,
772 codec_dai);
773 if (ret < 0) {
774 dev_err(codec_dai->dev,
775 "ASoC: codec DAI prepare error: %d\n",
776 ret);
777 goto out;
778 }
779 }
780 }
781
782 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
783 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
784 if (ret < 0) {
785 dev_err(cpu_dai->dev,
786 "ASoC: cpu DAI prepare error: %d\n", ret);
787 goto out;
788 }
789 }
790
791 /* cancel any delayed stream shutdown that is pending */
792 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
793 rtd->pop_wait) {
794 rtd->pop_wait = 0;
795 cancel_delayed_work(&rtd->delayed_work);
796 }
797
798 snd_soc_dapm_stream_event(rtd, substream->stream,
799 SND_SOC_DAPM_STREAM_START);
800
801 for (i = 0; i < rtd->num_codecs; i++)
802 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
803 substream->stream);
804 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
805
806 out:
807 mutex_unlock(&rtd->pcm_mutex);
808 return ret;
809 }
810
811 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
812 unsigned int mask)
813 {
814 struct snd_interval *interval;
815 int channels = hweight_long(mask);
816
817 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
818 interval->min = channels;
819 interval->max = channels;
820 }
821
822 int soc_dai_hw_params(struct snd_pcm_substream *substream,
823 struct snd_pcm_hw_params *params,
824 struct snd_soc_dai *dai)
825 {
826 int ret;
827
828 if (dai->driver->ops && dai->driver->ops->hw_params) {
829 ret = dai->driver->ops->hw_params(substream, params, dai);
830 if (ret < 0) {
831 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
832 dai->name, ret);
833 return ret;
834 }
835 }
836
837 return 0;
838 }
839
840 /*
841 * Called by ALSA when the hardware params are set by application. This
842 * function can also be called multiple times and can allocate buffers
843 * (using snd_pcm_lib_* ). It's non-atomic.
844 */
845 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
846 struct snd_pcm_hw_params *params)
847 {
848 struct snd_soc_pcm_runtime *rtd = substream->private_data;
849 struct snd_soc_platform *platform = rtd->platform;
850 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
851 int i, ret = 0;
852
853 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
854
855 ret = soc_pcm_params_symmetry(substream, params);
856 if (ret)
857 goto out;
858
859 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
860 ret = rtd->dai_link->ops->hw_params(substream, params);
861 if (ret < 0) {
862 dev_err(rtd->card->dev, "ASoC: machine hw_params"
863 " failed: %d\n", ret);
864 goto out;
865 }
866 }
867
868 for (i = 0; i < rtd->num_codecs; i++) {
869 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
870 struct snd_pcm_hw_params codec_params;
871
872 /*
873 * Skip CODECs which don't support the current stream type,
874 * the idea being that if a CODEC is not used for the currently
875 * set up transfer direction, it should not need to be
876 * configured, especially since the configuration used might
877 * not even be supported by that CODEC. There may be cases
878 * however where a CODEC needs to be set up although it is
879 * actually not being used for the transfer, e.g. if a
880 * capture-only CODEC is acting as an LRCLK and/or BCLK master
881 * for the DAI link including a playback-only CODEC.
882 * If this becomes necessary, we will have to augment the
883 * machine driver setup with information on how to act, so
884 * we can do the right thing here.
885 */
886 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
887 continue;
888
889 /* copy params for each codec */
890 codec_params = *params;
891
892 /* fixup params based on TDM slot masks */
893 if (codec_dai->tx_mask)
894 soc_pcm_codec_params_fixup(&codec_params,
895 codec_dai->tx_mask);
896 if (codec_dai->rx_mask)
897 soc_pcm_codec_params_fixup(&codec_params,
898 codec_dai->rx_mask);
899
900 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
901 if(ret < 0)
902 goto codec_err;
903
904 codec_dai->rate = params_rate(&codec_params);
905 codec_dai->channels = params_channels(&codec_params);
906 codec_dai->sample_bits = snd_pcm_format_physical_width(
907 params_format(&codec_params));
908 }
909
910 ret = soc_dai_hw_params(substream, params, cpu_dai);
911 if (ret < 0)
912 goto interface_err;
913
914 if (platform->driver->ops && platform->driver->ops->hw_params) {
915 ret = platform->driver->ops->hw_params(substream, params);
916 if (ret < 0) {
917 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
918 platform->component.name, ret);
919 goto platform_err;
920 }
921 }
922
923 /* store the parameters for each DAIs */
924 cpu_dai->rate = params_rate(params);
925 cpu_dai->channels = params_channels(params);
926 cpu_dai->sample_bits =
927 snd_pcm_format_physical_width(params_format(params));
928
929 out:
930 mutex_unlock(&rtd->pcm_mutex);
931 return ret;
932
933 platform_err:
934 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
935 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
936
937 interface_err:
938 i = rtd->num_codecs;
939
940 codec_err:
941 while (--i >= 0) {
942 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
943 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
944 codec_dai->driver->ops->hw_free(substream, codec_dai);
945 codec_dai->rate = 0;
946 }
947
948 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
949 rtd->dai_link->ops->hw_free(substream);
950
951 mutex_unlock(&rtd->pcm_mutex);
952 return ret;
953 }
954
955 /*
956 * Frees resources allocated by hw_params, can be called multiple times
957 */
958 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
959 {
960 struct snd_soc_pcm_runtime *rtd = substream->private_data;
961 struct snd_soc_platform *platform = rtd->platform;
962 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
963 struct snd_soc_dai *codec_dai;
964 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
965 int i;
966
967 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
968
969 /* clear the corresponding DAIs parameters when going to be inactive */
970 if (cpu_dai->active == 1) {
971 cpu_dai->rate = 0;
972 cpu_dai->channels = 0;
973 cpu_dai->sample_bits = 0;
974 }
975
976 for (i = 0; i < rtd->num_codecs; i++) {
977 codec_dai = rtd->codec_dais[i];
978 if (codec_dai->active == 1) {
979 codec_dai->rate = 0;
980 codec_dai->channels = 0;
981 codec_dai->sample_bits = 0;
982 }
983 }
984
985 /* apply codec digital mute */
986 for (i = 0; i < rtd->num_codecs; i++) {
987 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
988 (!playback && rtd->codec_dais[i]->capture_active == 1))
989 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
990 substream->stream);
991 }
992
993 /* free any machine hw params */
994 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
995 rtd->dai_link->ops->hw_free(substream);
996
997 /* free any DMA resources */
998 if (platform->driver->ops && platform->driver->ops->hw_free)
999 platform->driver->ops->hw_free(substream);
1000
1001 /* now free hw params for the DAIs */
1002 for (i = 0; i < rtd->num_codecs; i++) {
1003 codec_dai = rtd->codec_dais[i];
1004 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
1005 codec_dai->driver->ops->hw_free(substream, codec_dai);
1006 }
1007
1008 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
1009 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1010
1011 mutex_unlock(&rtd->pcm_mutex);
1012 return 0;
1013 }
1014
1015 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1016 {
1017 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1018 struct snd_soc_platform *platform = rtd->platform;
1019 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1020 struct snd_soc_dai *codec_dai;
1021 int i, ret;
1022
1023 for (i = 0; i < rtd->num_codecs; i++) {
1024 codec_dai = rtd->codec_dais[i];
1025 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
1026 ret = codec_dai->driver->ops->trigger(substream,
1027 cmd, codec_dai);
1028 if (ret < 0)
1029 return ret;
1030 }
1031 }
1032
1033 if (platform->driver->ops && platform->driver->ops->trigger) {
1034 ret = platform->driver->ops->trigger(substream, cmd);
1035 if (ret < 0)
1036 return ret;
1037 }
1038
1039 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
1040 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1041 if (ret < 0)
1042 return ret;
1043 }
1044
1045 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1046 ret = rtd->dai_link->ops->trigger(substream, cmd);
1047 if (ret < 0)
1048 return ret;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1055 int cmd)
1056 {
1057 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1058 struct snd_soc_platform *platform = rtd->platform;
1059 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1060 struct snd_soc_dai *codec_dai;
1061 int i, ret;
1062
1063 for (i = 0; i < rtd->num_codecs; i++) {
1064 codec_dai = rtd->codec_dais[i];
1065 if (codec_dai->driver->ops &&
1066 codec_dai->driver->ops->bespoke_trigger) {
1067 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1068 cmd, codec_dai);
1069 if (ret < 0)
1070 return ret;
1071 }
1072 }
1073
1074 if (platform->driver->bespoke_trigger) {
1075 ret = platform->driver->bespoke_trigger(substream, cmd);
1076 if (ret < 0)
1077 return ret;
1078 }
1079
1080 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1081 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1082 if (ret < 0)
1083 return ret;
1084 }
1085 return 0;
1086 }
1087 /*
1088 * soc level wrapper for pointer callback
1089 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1090 * the runtime->delay will be updated accordingly.
1091 */
1092 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1093 {
1094 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1095 struct snd_soc_platform *platform = rtd->platform;
1096 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1097 struct snd_soc_dai *codec_dai;
1098 struct snd_pcm_runtime *runtime = substream->runtime;
1099 snd_pcm_uframes_t offset = 0;
1100 snd_pcm_sframes_t delay = 0;
1101 snd_pcm_sframes_t codec_delay = 0;
1102 int i;
1103
1104 if (platform->driver->ops && platform->driver->ops->pointer)
1105 offset = platform->driver->ops->pointer(substream);
1106
1107 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1108 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1109
1110 for (i = 0; i < rtd->num_codecs; i++) {
1111 codec_dai = rtd->codec_dais[i];
1112 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1113 codec_delay = max(codec_delay,
1114 codec_dai->driver->ops->delay(substream,
1115 codec_dai));
1116 }
1117 delay += codec_delay;
1118
1119 /*
1120 * None of the existing platform drivers implement delay(), so
1121 * for now the codec_dai of first multicodec entry is used
1122 */
1123 if (platform->driver->delay)
1124 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1125
1126 runtime->delay = delay;
1127
1128 return offset;
1129 }
1130
1131 /* connect a FE and BE */
1132 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1133 struct snd_soc_pcm_runtime *be, int stream)
1134 {
1135 struct snd_soc_dpcm *dpcm;
1136
1137 /* only add new dpcms */
1138 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1139 if (dpcm->be == be && dpcm->fe == fe)
1140 return 0;
1141 }
1142
1143 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1144 if (!dpcm)
1145 return -ENOMEM;
1146
1147 dpcm->be = be;
1148 dpcm->fe = fe;
1149 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1150 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1151 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1152 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1153
1154 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1155 stream ? "capture" : "playback", fe->dai_link->name,
1156 stream ? "<-" : "->", be->dai_link->name);
1157
1158 #ifdef CONFIG_DEBUG_FS
1159 if (fe->debugfs_dpcm_root)
1160 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1161 fe->debugfs_dpcm_root, &dpcm->state);
1162 #endif
1163 return 1;
1164 }
1165
1166 /* reparent a BE onto another FE */
1167 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1168 struct snd_soc_pcm_runtime *be, int stream)
1169 {
1170 struct snd_soc_dpcm *dpcm;
1171 struct snd_pcm_substream *fe_substream, *be_substream;
1172
1173 /* reparent if BE is connected to other FEs */
1174 if (!be->dpcm[stream].users)
1175 return;
1176
1177 be_substream = snd_soc_dpcm_get_substream(be, stream);
1178
1179 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1180 if (dpcm->fe == fe)
1181 continue;
1182
1183 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1184 stream ? "capture" : "playback",
1185 dpcm->fe->dai_link->name,
1186 stream ? "<-" : "->", dpcm->be->dai_link->name);
1187
1188 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1189 be_substream->runtime = fe_substream->runtime;
1190 break;
1191 }
1192 }
1193
1194 /* disconnect a BE and FE */
1195 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1196 {
1197 struct snd_soc_dpcm *dpcm, *d;
1198
1199 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1200 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1201 stream ? "capture" : "playback",
1202 dpcm->be->dai_link->name);
1203
1204 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1205 continue;
1206
1207 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1208 stream ? "capture" : "playback", fe->dai_link->name,
1209 stream ? "<-" : "->", dpcm->be->dai_link->name);
1210
1211 /* BEs still alive need new FE */
1212 dpcm_be_reparent(fe, dpcm->be, stream);
1213
1214 #ifdef CONFIG_DEBUG_FS
1215 debugfs_remove(dpcm->debugfs_state);
1216 #endif
1217 list_del(&dpcm->list_be);
1218 list_del(&dpcm->list_fe);
1219 kfree(dpcm);
1220 }
1221 }
1222
1223 /* get BE for DAI widget and stream */
1224 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1225 struct snd_soc_dapm_widget *widget, int stream)
1226 {
1227 struct snd_soc_pcm_runtime *be;
1228 int i;
1229
1230 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1231 list_for_each_entry(be, &card->rtd_list, list) {
1232
1233 if (!be->dai_link->no_pcm)
1234 continue;
1235
1236 if (be->cpu_dai->playback_widget == widget)
1237 return be;
1238
1239 for (i = 0; i < be->num_codecs; i++) {
1240 struct snd_soc_dai *dai = be->codec_dais[i];
1241 if (dai->playback_widget == widget)
1242 return be;
1243 }
1244 }
1245 } else {
1246
1247 list_for_each_entry(be, &card->rtd_list, list) {
1248
1249 if (!be->dai_link->no_pcm)
1250 continue;
1251
1252 if (be->cpu_dai->capture_widget == widget)
1253 return be;
1254
1255 for (i = 0; i < be->num_codecs; i++) {
1256 struct snd_soc_dai *dai = be->codec_dais[i];
1257 if (dai->capture_widget == widget)
1258 return be;
1259 }
1260 }
1261 }
1262
1263 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1264 stream ? "capture" : "playback", widget->name);
1265 return NULL;
1266 }
1267
1268 static inline struct snd_soc_dapm_widget *
1269 dai_get_widget(struct snd_soc_dai *dai, int stream)
1270 {
1271 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1272 return dai->playback_widget;
1273 else
1274 return dai->capture_widget;
1275 }
1276
1277 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1278 struct snd_soc_dapm_widget *widget)
1279 {
1280 int i;
1281
1282 for (i = 0; i < list->num_widgets; i++) {
1283 if (widget == list->widgets[i])
1284 return 1;
1285 }
1286
1287 return 0;
1288 }
1289
1290 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1291 enum snd_soc_dapm_direction dir)
1292 {
1293 struct snd_soc_card *card = widget->dapm->card;
1294 struct snd_soc_pcm_runtime *rtd;
1295 int i;
1296
1297 if (dir == SND_SOC_DAPM_DIR_OUT) {
1298 list_for_each_entry(rtd, &card->rtd_list, list) {
1299 if (!rtd->dai_link->no_pcm)
1300 continue;
1301
1302 if (rtd->cpu_dai->playback_widget == widget)
1303 return true;
1304
1305 for (i = 0; i < rtd->num_codecs; ++i) {
1306 struct snd_soc_dai *dai = rtd->codec_dais[i];
1307 if (dai->playback_widget == widget)
1308 return true;
1309 }
1310 }
1311 } else { /* SND_SOC_DAPM_DIR_IN */
1312 list_for_each_entry(rtd, &card->rtd_list, list) {
1313 if (!rtd->dai_link->no_pcm)
1314 continue;
1315
1316 if (rtd->cpu_dai->capture_widget == widget)
1317 return true;
1318
1319 for (i = 0; i < rtd->num_codecs; ++i) {
1320 struct snd_soc_dai *dai = rtd->codec_dais[i];
1321 if (dai->capture_widget == widget)
1322 return true;
1323 }
1324 }
1325 }
1326
1327 return false;
1328 }
1329
1330 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1331 int stream, struct snd_soc_dapm_widget_list **list)
1332 {
1333 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1334 int paths;
1335
1336 /* get number of valid DAI paths and their widgets */
1337 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1338 dpcm_end_walk_at_be);
1339
1340 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1341 stream ? "capture" : "playback");
1342
1343 return paths;
1344 }
1345
1346 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1347 struct snd_soc_dapm_widget_list **list_)
1348 {
1349 struct snd_soc_dpcm *dpcm;
1350 struct snd_soc_dapm_widget_list *list = *list_;
1351 struct snd_soc_dapm_widget *widget;
1352 int prune = 0;
1353
1354 /* Destroy any old FE <--> BE connections */
1355 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1356 unsigned int i;
1357
1358 /* is there a valid CPU DAI widget for this BE */
1359 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1360
1361 /* prune the BE if it's no longer in our active list */
1362 if (widget && widget_in_list(list, widget))
1363 continue;
1364
1365 /* is there a valid CODEC DAI widget for this BE */
1366 for (i = 0; i < dpcm->be->num_codecs; i++) {
1367 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1368 widget = dai_get_widget(dai, stream);
1369
1370 /* prune the BE if it's no longer in our active list */
1371 if (widget && widget_in_list(list, widget))
1372 continue;
1373 }
1374
1375 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1376 stream ? "capture" : "playback",
1377 dpcm->be->dai_link->name, fe->dai_link->name);
1378 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1379 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1380 prune++;
1381 }
1382
1383 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1384 return prune;
1385 }
1386
1387 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1388 struct snd_soc_dapm_widget_list **list_)
1389 {
1390 struct snd_soc_card *card = fe->card;
1391 struct snd_soc_dapm_widget_list *list = *list_;
1392 struct snd_soc_pcm_runtime *be;
1393 int i, new = 0, err;
1394
1395 /* Create any new FE <--> BE connections */
1396 for (i = 0; i < list->num_widgets; i++) {
1397
1398 switch (list->widgets[i]->id) {
1399 case snd_soc_dapm_dai_in:
1400 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1401 continue;
1402 break;
1403 case snd_soc_dapm_dai_out:
1404 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1405 continue;
1406 break;
1407 default:
1408 continue;
1409 }
1410
1411 /* is there a valid BE rtd for this widget */
1412 be = dpcm_get_be(card, list->widgets[i], stream);
1413 if (!be) {
1414 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1415 list->widgets[i]->name);
1416 continue;
1417 }
1418
1419 /* make sure BE is a real BE */
1420 if (!be->dai_link->no_pcm)
1421 continue;
1422
1423 /* don't connect if FE is not running */
1424 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1425 continue;
1426
1427 /* newly connected FE and BE */
1428 err = dpcm_be_connect(fe, be, stream);
1429 if (err < 0) {
1430 dev_err(fe->dev, "ASoC: can't connect %s\n",
1431 list->widgets[i]->name);
1432 break;
1433 } else if (err == 0) /* already connected */
1434 continue;
1435
1436 /* new */
1437 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1438 new++;
1439 }
1440
1441 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1442 return new;
1443 }
1444
1445 /*
1446 * Find the corresponding BE DAIs that source or sink audio to this
1447 * FE substream.
1448 */
1449 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1450 int stream, struct snd_soc_dapm_widget_list **list, int new)
1451 {
1452 if (new)
1453 return dpcm_add_paths(fe, stream, list);
1454 else
1455 return dpcm_prune_paths(fe, stream, list);
1456 }
1457
1458 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1459 {
1460 struct snd_soc_dpcm *dpcm;
1461
1462 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1463 dpcm->be->dpcm[stream].runtime_update =
1464 SND_SOC_DPCM_UPDATE_NO;
1465 }
1466
1467 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1468 int stream)
1469 {
1470 struct snd_soc_dpcm *dpcm;
1471
1472 /* disable any enabled and non active backends */
1473 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1474
1475 struct snd_soc_pcm_runtime *be = dpcm->be;
1476 struct snd_pcm_substream *be_substream =
1477 snd_soc_dpcm_get_substream(be, stream);
1478
1479 if (be->dpcm[stream].users == 0)
1480 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1481 stream ? "capture" : "playback",
1482 be->dpcm[stream].state);
1483
1484 if (--be->dpcm[stream].users != 0)
1485 continue;
1486
1487 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1488 continue;
1489
1490 soc_pcm_close(be_substream);
1491 be_substream->runtime = NULL;
1492 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1493 }
1494 }
1495
1496 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1497 {
1498 struct snd_soc_dpcm *dpcm;
1499 int err, count = 0;
1500
1501 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1502 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1503
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 (!be_substream) {
1509 dev_err(be->dev, "ASoC: no backend %s stream\n",
1510 stream ? "capture" : "playback");
1511 continue;
1512 }
1513
1514 /* is this op for this BE ? */
1515 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1516 continue;
1517
1518 /* first time the dpcm is open ? */
1519 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1520 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1521 stream ? "capture" : "playback",
1522 be->dpcm[stream].state);
1523
1524 if (be->dpcm[stream].users++ != 0)
1525 continue;
1526
1527 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1528 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1529 continue;
1530
1531 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1532 stream ? "capture" : "playback", be->dai_link->name);
1533
1534 be_substream->runtime = be->dpcm[stream].runtime;
1535 err = soc_pcm_open(be_substream);
1536 if (err < 0) {
1537 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1538 be->dpcm[stream].users--;
1539 if (be->dpcm[stream].users < 0)
1540 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1541 stream ? "capture" : "playback",
1542 be->dpcm[stream].state);
1543
1544 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1545 goto unwind;
1546 }
1547
1548 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1549 count++;
1550 }
1551
1552 return count;
1553
1554 unwind:
1555 /* disable any enabled and non active backends */
1556 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1557 struct snd_soc_pcm_runtime *be = dpcm->be;
1558 struct snd_pcm_substream *be_substream =
1559 snd_soc_dpcm_get_substream(be, stream);
1560
1561 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1562 continue;
1563
1564 if (be->dpcm[stream].users == 0)
1565 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1566 stream ? "capture" : "playback",
1567 be->dpcm[stream].state);
1568
1569 if (--be->dpcm[stream].users != 0)
1570 continue;
1571
1572 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1573 continue;
1574
1575 soc_pcm_close(be_substream);
1576 be_substream->runtime = NULL;
1577 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1578 }
1579
1580 return err;
1581 }
1582
1583 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1584 struct snd_soc_pcm_stream *stream,
1585 u64 formats)
1586 {
1587 runtime->hw.rate_min = stream->rate_min;
1588 runtime->hw.rate_max = stream->rate_max;
1589 runtime->hw.channels_min = stream->channels_min;
1590 runtime->hw.channels_max = stream->channels_max;
1591 if (runtime->hw.formats)
1592 runtime->hw.formats &= formats & stream->formats;
1593 else
1594 runtime->hw.formats = formats & stream->formats;
1595 runtime->hw.rates = stream->rates;
1596 }
1597
1598 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1599 {
1600 struct snd_soc_pcm_runtime *fe = substream->private_data;
1601 struct snd_soc_dpcm *dpcm;
1602 u64 formats = ULLONG_MAX;
1603 int stream = substream->stream;
1604
1605 if (!fe->dai_link->dpcm_merged_format)
1606 return formats;
1607
1608 /*
1609 * It returns merged BE codec format
1610 * if FE want to use it (= dpcm_merged_format)
1611 */
1612
1613 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1614 struct snd_soc_pcm_runtime *be = dpcm->be;
1615 struct snd_soc_dai_driver *codec_dai_drv;
1616 struct snd_soc_pcm_stream *codec_stream;
1617 int i;
1618
1619 for (i = 0; i < be->num_codecs; i++) {
1620 codec_dai_drv = be->codec_dais[i]->driver;
1621 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1622 codec_stream = &codec_dai_drv->playback;
1623 else
1624 codec_stream = &codec_dai_drv->capture;
1625
1626 formats &= codec_stream->formats;
1627 }
1628 }
1629
1630 return formats;
1631 }
1632
1633 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1634 {
1635 struct snd_pcm_runtime *runtime = substream->runtime;
1636 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1637 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1638 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1639 u64 format = dpcm_runtime_base_format(substream);
1640
1641 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1642 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1643 else
1644 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1645 }
1646
1647 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1648
1649 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1650 * for avoiding the race with trigger callback.
1651 * If the state is unset and a trigger is pending while the previous operation,
1652 * process the pending trigger action here.
1653 */
1654 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1655 int stream, enum snd_soc_dpcm_update state)
1656 {
1657 struct snd_pcm_substream *substream =
1658 snd_soc_dpcm_get_substream(fe, stream);
1659
1660 snd_pcm_stream_lock_irq(substream);
1661 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1662 dpcm_fe_dai_do_trigger(substream,
1663 fe->dpcm[stream].trigger_pending - 1);
1664 fe->dpcm[stream].trigger_pending = 0;
1665 }
1666 fe->dpcm[stream].runtime_update = state;
1667 snd_pcm_stream_unlock_irq(substream);
1668 }
1669
1670 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1671 int stream)
1672 {
1673 struct snd_soc_dpcm *dpcm;
1674 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1675 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1676 int err;
1677
1678 /* apply symmetry for FE */
1679 if (soc_pcm_has_symmetry(fe_substream))
1680 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1681
1682 /* Symmetry only applies if we've got an active stream. */
1683 if (fe_cpu_dai->active) {
1684 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1685 if (err < 0)
1686 return err;
1687 }
1688
1689 /* apply symmetry for BE */
1690 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1691 struct snd_soc_pcm_runtime *be = dpcm->be;
1692 struct snd_pcm_substream *be_substream =
1693 snd_soc_dpcm_get_substream(be, stream);
1694 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1695 int i;
1696
1697 if (soc_pcm_has_symmetry(be_substream))
1698 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1699
1700 /* Symmetry only applies if we've got an active stream. */
1701 if (rtd->cpu_dai->active) {
1702 err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
1703 if (err < 0)
1704 return err;
1705 }
1706
1707 for (i = 0; i < rtd->num_codecs; i++) {
1708 if (rtd->codec_dais[i]->active) {
1709 err = soc_pcm_apply_symmetry(be_substream,
1710 rtd->codec_dais[i]);
1711 if (err < 0)
1712 return err;
1713 }
1714 }
1715 }
1716
1717 return 0;
1718 }
1719
1720 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1721 {
1722 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1723 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1724 int stream = fe_substream->stream, ret = 0;
1725
1726 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1727
1728 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1729 if (ret < 0) {
1730 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1731 goto be_err;
1732 }
1733
1734 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1735
1736 /* start the DAI frontend */
1737 ret = soc_pcm_open(fe_substream);
1738 if (ret < 0) {
1739 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1740 goto unwind;
1741 }
1742
1743 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1744
1745 dpcm_set_fe_runtime(fe_substream);
1746 snd_pcm_limit_hw_rates(runtime);
1747
1748 ret = dpcm_apply_symmetry(fe_substream, stream);
1749 if (ret < 0) {
1750 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1751 ret);
1752 goto unwind;
1753 }
1754
1755 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1756 return 0;
1757
1758 unwind:
1759 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1760 be_err:
1761 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1762 return ret;
1763 }
1764
1765 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1766 {
1767 struct snd_soc_dpcm *dpcm;
1768
1769 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1770 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1771
1772 struct snd_soc_pcm_runtime *be = dpcm->be;
1773 struct snd_pcm_substream *be_substream =
1774 snd_soc_dpcm_get_substream(be, stream);
1775
1776 /* is this op for this BE ? */
1777 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1778 continue;
1779
1780 if (be->dpcm[stream].users == 0)
1781 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1782 stream ? "capture" : "playback",
1783 be->dpcm[stream].state);
1784
1785 if (--be->dpcm[stream].users != 0)
1786 continue;
1787
1788 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1789 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1790 continue;
1791
1792 dev_dbg(be->dev, "ASoC: close BE %s\n",
1793 dpcm->fe->dai_link->name);
1794
1795 soc_pcm_close(be_substream);
1796 be_substream->runtime = NULL;
1797
1798 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1799 }
1800 return 0;
1801 }
1802
1803 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1804 {
1805 struct snd_soc_pcm_runtime *fe = substream->private_data;
1806 int stream = substream->stream;
1807
1808 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1809
1810 /* shutdown the BEs */
1811 dpcm_be_dai_shutdown(fe, substream->stream);
1812
1813 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1814
1815 /* now shutdown the frontend */
1816 soc_pcm_close(substream);
1817
1818 /* run the stream event for each BE */
1819 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1820
1821 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1822 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1823 return 0;
1824 }
1825
1826 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1827 {
1828 struct snd_soc_dpcm *dpcm;
1829
1830 /* only hw_params backends that are either sinks or sources
1831 * to this frontend DAI */
1832 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1833
1834 struct snd_soc_pcm_runtime *be = dpcm->be;
1835 struct snd_pcm_substream *be_substream =
1836 snd_soc_dpcm_get_substream(be, stream);
1837
1838 /* is this op for this BE ? */
1839 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1840 continue;
1841
1842 /* only free hw when no longer used - check all FEs */
1843 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1844 continue;
1845
1846 /* do not free hw if this BE is used by other FE */
1847 if (be->dpcm[stream].users > 1)
1848 continue;
1849
1850 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1851 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1852 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1853 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1854 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1855 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1856 continue;
1857
1858 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1859 dpcm->fe->dai_link->name);
1860
1861 soc_pcm_hw_free(be_substream);
1862
1863 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1864 }
1865
1866 return 0;
1867 }
1868
1869 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1870 {
1871 struct snd_soc_pcm_runtime *fe = substream->private_data;
1872 int err, stream = substream->stream;
1873
1874 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1875 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1876
1877 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1878
1879 /* call hw_free on the frontend */
1880 err = soc_pcm_hw_free(substream);
1881 if (err < 0)
1882 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1883 fe->dai_link->name);
1884
1885 /* only hw_params backends that are either sinks or sources
1886 * to this frontend DAI */
1887 err = dpcm_be_dai_hw_free(fe, stream);
1888
1889 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1890 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1891
1892 mutex_unlock(&fe->card->mutex);
1893 return 0;
1894 }
1895
1896 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1897 {
1898 struct snd_soc_dpcm *dpcm;
1899 int ret;
1900
1901 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1902
1903 struct snd_soc_pcm_runtime *be = dpcm->be;
1904 struct snd_pcm_substream *be_substream =
1905 snd_soc_dpcm_get_substream(be, stream);
1906
1907 /* is this op for this BE ? */
1908 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1909 continue;
1910
1911 /* copy params for each dpcm */
1912 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1913 sizeof(struct snd_pcm_hw_params));
1914
1915 /* perform any hw_params fixups */
1916 if (be->dai_link->be_hw_params_fixup) {
1917 ret = be->dai_link->be_hw_params_fixup(be,
1918 &dpcm->hw_params);
1919 if (ret < 0) {
1920 dev_err(be->dev,
1921 "ASoC: hw_params BE fixup failed %d\n",
1922 ret);
1923 goto unwind;
1924 }
1925 }
1926
1927 /* only allow hw_params() if no connected FEs are running */
1928 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1929 continue;
1930
1931 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1932 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1934 continue;
1935
1936 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1937 dpcm->fe->dai_link->name);
1938
1939 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1940 if (ret < 0) {
1941 dev_err(dpcm->be->dev,
1942 "ASoC: hw_params BE failed %d\n", ret);
1943 goto unwind;
1944 }
1945
1946 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1947 }
1948 return 0;
1949
1950 unwind:
1951 /* disable any enabled and non active backends */
1952 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1953 struct snd_soc_pcm_runtime *be = dpcm->be;
1954 struct snd_pcm_substream *be_substream =
1955 snd_soc_dpcm_get_substream(be, stream);
1956
1957 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1958 continue;
1959
1960 /* only allow hw_free() if no connected FEs are running */
1961 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1962 continue;
1963
1964 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1965 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1966 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1967 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1968 continue;
1969
1970 soc_pcm_hw_free(be_substream);
1971 }
1972
1973 return ret;
1974 }
1975
1976 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1977 struct snd_pcm_hw_params *params)
1978 {
1979 struct snd_soc_pcm_runtime *fe = substream->private_data;
1980 int ret, stream = substream->stream;
1981
1982 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1983 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1984
1985 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1986 sizeof(struct snd_pcm_hw_params));
1987 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1988 if (ret < 0) {
1989 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1990 goto out;
1991 }
1992
1993 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1994 fe->dai_link->name, params_rate(params),
1995 params_channels(params), params_format(params));
1996
1997 /* call hw_params on the frontend */
1998 ret = soc_pcm_hw_params(substream, params);
1999 if (ret < 0) {
2000 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2001 dpcm_be_dai_hw_free(fe, stream);
2002 } else
2003 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2004
2005 out:
2006 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2007 mutex_unlock(&fe->card->mutex);
2008 return ret;
2009 }
2010
2011 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2012 struct snd_pcm_substream *substream, int cmd)
2013 {
2014 int ret;
2015
2016 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2017 dpcm->fe->dai_link->name, cmd);
2018
2019 ret = soc_pcm_trigger(substream, cmd);
2020 if (ret < 0)
2021 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2022
2023 return ret;
2024 }
2025
2026 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2027 int cmd)
2028 {
2029 struct snd_soc_dpcm *dpcm;
2030 int ret = 0;
2031
2032 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2033
2034 struct snd_soc_pcm_runtime *be = dpcm->be;
2035 struct snd_pcm_substream *be_substream =
2036 snd_soc_dpcm_get_substream(be, stream);
2037
2038 /* is this op for this BE ? */
2039 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2040 continue;
2041
2042 switch (cmd) {
2043 case SNDRV_PCM_TRIGGER_START:
2044 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2046 continue;
2047
2048 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2049 if (ret)
2050 return ret;
2051
2052 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2053 break;
2054 case SNDRV_PCM_TRIGGER_RESUME:
2055 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2056 continue;
2057
2058 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2059 if (ret)
2060 return ret;
2061
2062 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2063 break;
2064 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2065 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2066 continue;
2067
2068 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2069 if (ret)
2070 return ret;
2071
2072 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2073 break;
2074 case SNDRV_PCM_TRIGGER_STOP:
2075 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2076 continue;
2077
2078 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2079 continue;
2080
2081 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2082 if (ret)
2083 return ret;
2084
2085 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2086 break;
2087 case SNDRV_PCM_TRIGGER_SUSPEND:
2088 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2089 continue;
2090
2091 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2092 continue;
2093
2094 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2095 if (ret)
2096 return ret;
2097
2098 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2099 break;
2100 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2101 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2102 continue;
2103
2104 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2105 continue;
2106
2107 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2108 if (ret)
2109 return ret;
2110
2111 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2112 break;
2113 }
2114 }
2115
2116 return ret;
2117 }
2118 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2119
2120 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2121 {
2122 struct snd_soc_pcm_runtime *fe = substream->private_data;
2123 int stream = substream->stream, ret;
2124 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2125
2126 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2127
2128 switch (trigger) {
2129 case SND_SOC_DPCM_TRIGGER_PRE:
2130 /* call trigger on the frontend before the backend. */
2131
2132 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2133 fe->dai_link->name, cmd);
2134
2135 ret = soc_pcm_trigger(substream, cmd);
2136 if (ret < 0) {
2137 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2138 goto out;
2139 }
2140
2141 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2142 break;
2143 case SND_SOC_DPCM_TRIGGER_POST:
2144 /* call trigger on the frontend after the backend. */
2145
2146 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2147 if (ret < 0) {
2148 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2149 goto out;
2150 }
2151
2152 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2153 fe->dai_link->name, cmd);
2154
2155 ret = soc_pcm_trigger(substream, cmd);
2156 break;
2157 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2158 /* bespoke trigger() - handles both FE and BEs */
2159
2160 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2161 fe->dai_link->name, cmd);
2162
2163 ret = soc_pcm_bespoke_trigger(substream, cmd);
2164 if (ret < 0) {
2165 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2166 goto out;
2167 }
2168 break;
2169 default:
2170 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2171 fe->dai_link->name);
2172 ret = -EINVAL;
2173 goto out;
2174 }
2175
2176 switch (cmd) {
2177 case SNDRV_PCM_TRIGGER_START:
2178 case SNDRV_PCM_TRIGGER_RESUME:
2179 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2180 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2181 break;
2182 case SNDRV_PCM_TRIGGER_STOP:
2183 case SNDRV_PCM_TRIGGER_SUSPEND:
2184 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2185 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2186 break;
2187 }
2188
2189 out:
2190 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2191 return ret;
2192 }
2193
2194 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2195 {
2196 struct snd_soc_pcm_runtime *fe = substream->private_data;
2197 int stream = substream->stream;
2198
2199 /* if FE's runtime_update is already set, we're in race;
2200 * process this trigger later at exit
2201 */
2202 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2203 fe->dpcm[stream].trigger_pending = cmd + 1;
2204 return 0; /* delayed, assuming it's successful */
2205 }
2206
2207 /* we're alone, let's trigger */
2208 return dpcm_fe_dai_do_trigger(substream, cmd);
2209 }
2210
2211 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2212 {
2213 struct snd_soc_dpcm *dpcm;
2214 int ret = 0;
2215
2216 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2217
2218 struct snd_soc_pcm_runtime *be = dpcm->be;
2219 struct snd_pcm_substream *be_substream =
2220 snd_soc_dpcm_get_substream(be, stream);
2221
2222 /* is this op for this BE ? */
2223 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2224 continue;
2225
2226 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2227 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2228 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2229 continue;
2230
2231 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2232 dpcm->fe->dai_link->name);
2233
2234 ret = soc_pcm_prepare(be_substream);
2235 if (ret < 0) {
2236 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2237 ret);
2238 break;
2239 }
2240
2241 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2242 }
2243 return ret;
2244 }
2245
2246 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2247 {
2248 struct snd_soc_pcm_runtime *fe = substream->private_data;
2249 int stream = substream->stream, ret = 0;
2250
2251 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2252
2253 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2254
2255 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2256
2257 /* there is no point preparing this FE if there are no BEs */
2258 if (list_empty(&fe->dpcm[stream].be_clients)) {
2259 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2260 fe->dai_link->name);
2261 ret = -EINVAL;
2262 goto out;
2263 }
2264
2265 ret = dpcm_be_dai_prepare(fe, substream->stream);
2266 if (ret < 0)
2267 goto out;
2268
2269 /* call prepare on the frontend */
2270 ret = soc_pcm_prepare(substream);
2271 if (ret < 0) {
2272 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2273 fe->dai_link->name);
2274 goto out;
2275 }
2276
2277 /* run the stream event for each BE */
2278 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2279 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2280
2281 out:
2282 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2283 mutex_unlock(&fe->card->mutex);
2284
2285 return ret;
2286 }
2287
2288 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2289 unsigned int cmd, void *arg)
2290 {
2291 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2292 struct snd_soc_platform *platform = rtd->platform;
2293
2294 if (platform->driver->ops && platform->driver->ops->ioctl)
2295 return platform->driver->ops->ioctl(substream, cmd, arg);
2296 return snd_pcm_lib_ioctl(substream, cmd, arg);
2297 }
2298
2299 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2300 {
2301 struct snd_pcm_substream *substream =
2302 snd_soc_dpcm_get_substream(fe, stream);
2303 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2304 int err;
2305
2306 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2307 stream ? "capture" : "playback", fe->dai_link->name);
2308
2309 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2310 /* call bespoke trigger - FE takes care of all BE triggers */
2311 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2312 fe->dai_link->name);
2313
2314 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2315 if (err < 0)
2316 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2317 } else {
2318 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2319 fe->dai_link->name);
2320
2321 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2322 if (err < 0)
2323 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2324 }
2325
2326 err = dpcm_be_dai_hw_free(fe, stream);
2327 if (err < 0)
2328 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2329
2330 err = dpcm_be_dai_shutdown(fe, stream);
2331 if (err < 0)
2332 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2333
2334 /* run the stream event for each BE */
2335 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2336
2337 return 0;
2338 }
2339
2340 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2341 {
2342 struct snd_pcm_substream *substream =
2343 snd_soc_dpcm_get_substream(fe, stream);
2344 struct snd_soc_dpcm *dpcm;
2345 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2346 int ret;
2347
2348 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2349 stream ? "capture" : "playback", fe->dai_link->name);
2350
2351 /* Only start the BE if the FE is ready */
2352 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2353 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2354 return -EINVAL;
2355
2356 /* startup must always be called for new BEs */
2357 ret = dpcm_be_dai_startup(fe, stream);
2358 if (ret < 0)
2359 goto disconnect;
2360
2361 /* keep going if FE state is > open */
2362 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2363 return 0;
2364
2365 ret = dpcm_be_dai_hw_params(fe, stream);
2366 if (ret < 0)
2367 goto close;
2368
2369 /* keep going if FE state is > hw_params */
2370 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2371 return 0;
2372
2373
2374 ret = dpcm_be_dai_prepare(fe, stream);
2375 if (ret < 0)
2376 goto hw_free;
2377
2378 /* run the stream event for each BE */
2379 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2380
2381 /* keep going if FE state is > prepare */
2382 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2383 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2384 return 0;
2385
2386 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2387 /* call trigger on the frontend - FE takes care of all BE triggers */
2388 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2389 fe->dai_link->name);
2390
2391 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2392 if (ret < 0) {
2393 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2394 goto hw_free;
2395 }
2396 } else {
2397 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2398 fe->dai_link->name);
2399
2400 ret = dpcm_be_dai_trigger(fe, stream,
2401 SNDRV_PCM_TRIGGER_START);
2402 if (ret < 0) {
2403 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2404 goto hw_free;
2405 }
2406 }
2407
2408 return 0;
2409
2410 hw_free:
2411 dpcm_be_dai_hw_free(fe, stream);
2412 close:
2413 dpcm_be_dai_shutdown(fe, stream);
2414 disconnect:
2415 /* disconnect any non started BEs */
2416 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2417 struct snd_soc_pcm_runtime *be = dpcm->be;
2418 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2419 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2420 }
2421
2422 return ret;
2423 }
2424
2425 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2426 {
2427 int ret;
2428
2429 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2430 ret = dpcm_run_update_startup(fe, stream);
2431 if (ret < 0)
2432 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2433 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2434
2435 return ret;
2436 }
2437
2438 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2439 {
2440 int ret;
2441
2442 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2443 ret = dpcm_run_update_shutdown(fe, stream);
2444 if (ret < 0)
2445 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2446 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2447
2448 return ret;
2449 }
2450
2451 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2452 * any DAI links.
2453 */
2454 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2455 {
2456 struct snd_soc_pcm_runtime *fe;
2457 int old, new, paths;
2458
2459 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2460 list_for_each_entry(fe, &card->rtd_list, list) {
2461 struct snd_soc_dapm_widget_list *list;
2462
2463 /* make sure link is FE */
2464 if (!fe->dai_link->dynamic)
2465 continue;
2466
2467 /* only check active links */
2468 if (!fe->cpu_dai->active)
2469 continue;
2470
2471 /* DAPM sync will call this to update DSP paths */
2472 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2473 fe->dai_link->name);
2474
2475 /* skip if FE doesn't have playback capability */
2476 if (!fe->cpu_dai->driver->playback.channels_min
2477 || !fe->codec_dai->driver->playback.channels_min)
2478 goto capture;
2479
2480 /* skip if FE isn't currently playing */
2481 if (!fe->cpu_dai->playback_active
2482 || !fe->codec_dai->playback_active)
2483 goto capture;
2484
2485 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2486 if (paths < 0) {
2487 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2488 fe->dai_link->name, "playback");
2489 mutex_unlock(&card->mutex);
2490 return paths;
2491 }
2492
2493 /* update any new playback paths */
2494 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2495 if (new) {
2496 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2497 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2498 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2499 }
2500
2501 /* update any old playback paths */
2502 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2503 if (old) {
2504 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2505 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2506 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2507 }
2508
2509 dpcm_path_put(&list);
2510 capture:
2511 /* skip if FE doesn't have capture capability */
2512 if (!fe->cpu_dai->driver->capture.channels_min
2513 || !fe->codec_dai->driver->capture.channels_min)
2514 continue;
2515
2516 /* skip if FE isn't currently capturing */
2517 if (!fe->cpu_dai->capture_active
2518 || !fe->codec_dai->capture_active)
2519 continue;
2520
2521 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2522 if (paths < 0) {
2523 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2524 fe->dai_link->name, "capture");
2525 mutex_unlock(&card->mutex);
2526 return paths;
2527 }
2528
2529 /* update any new capture paths */
2530 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2531 if (new) {
2532 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2533 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2534 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2535 }
2536
2537 /* update any old capture paths */
2538 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2539 if (old) {
2540 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2541 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2542 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2543 }
2544
2545 dpcm_path_put(&list);
2546 }
2547
2548 mutex_unlock(&card->mutex);
2549 return 0;
2550 }
2551 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2552 {
2553 struct snd_soc_dpcm *dpcm;
2554 struct list_head *clients =
2555 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2556
2557 list_for_each_entry(dpcm, clients, list_be) {
2558
2559 struct snd_soc_pcm_runtime *be = dpcm->be;
2560 int i;
2561
2562 if (be->dai_link->ignore_suspend)
2563 continue;
2564
2565 for (i = 0; i < be->num_codecs; i++) {
2566 struct snd_soc_dai *dai = be->codec_dais[i];
2567 struct snd_soc_dai_driver *drv = dai->driver;
2568
2569 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2570 be->dai_link->name);
2571
2572 if (drv->ops && drv->ops->digital_mute &&
2573 dai->playback_active)
2574 drv->ops->digital_mute(dai, mute);
2575 }
2576 }
2577
2578 return 0;
2579 }
2580
2581 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2582 {
2583 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2584 struct snd_soc_dpcm *dpcm;
2585 struct snd_soc_dapm_widget_list *list;
2586 int ret;
2587 int stream = fe_substream->stream;
2588
2589 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2590 fe->dpcm[stream].runtime = fe_substream->runtime;
2591
2592 ret = dpcm_path_get(fe, stream, &list);
2593 if (ret < 0) {
2594 mutex_unlock(&fe->card->mutex);
2595 return ret;
2596 } else if (ret == 0) {
2597 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2598 fe->dai_link->name, stream ? "capture" : "playback");
2599 }
2600
2601 /* calculate valid and active FE <-> BE dpcms */
2602 dpcm_process_paths(fe, stream, &list, 1);
2603
2604 ret = dpcm_fe_dai_startup(fe_substream);
2605 if (ret < 0) {
2606 /* clean up all links */
2607 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2608 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2609
2610 dpcm_be_disconnect(fe, stream);
2611 fe->dpcm[stream].runtime = NULL;
2612 }
2613
2614 dpcm_clear_pending_state(fe, stream);
2615 dpcm_path_put(&list);
2616 mutex_unlock(&fe->card->mutex);
2617 return ret;
2618 }
2619
2620 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2621 {
2622 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2623 struct snd_soc_dpcm *dpcm;
2624 int stream = fe_substream->stream, ret;
2625
2626 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2627 ret = dpcm_fe_dai_shutdown(fe_substream);
2628
2629 /* mark FE's links ready to prune */
2630 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2631 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2632
2633 dpcm_be_disconnect(fe, stream);
2634
2635 fe->dpcm[stream].runtime = NULL;
2636 mutex_unlock(&fe->card->mutex);
2637 return ret;
2638 }
2639
2640 /* create a new pcm */
2641 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2642 {
2643 struct snd_soc_platform *platform = rtd->platform;
2644 struct snd_soc_dai *codec_dai;
2645 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2646 struct snd_pcm *pcm;
2647 char new_name[64];
2648 int ret = 0, playback = 0, capture = 0;
2649 int i;
2650
2651 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2652 playback = rtd->dai_link->dpcm_playback;
2653 capture = rtd->dai_link->dpcm_capture;
2654 } else {
2655 for (i = 0; i < rtd->num_codecs; i++) {
2656 codec_dai = rtd->codec_dais[i];
2657 if (codec_dai->driver->playback.channels_min)
2658 playback = 1;
2659 if (codec_dai->driver->capture.channels_min)
2660 capture = 1;
2661 }
2662
2663 capture = capture && cpu_dai->driver->capture.channels_min;
2664 playback = playback && cpu_dai->driver->playback.channels_min;
2665 }
2666
2667 if (rtd->dai_link->playback_only) {
2668 playback = 1;
2669 capture = 0;
2670 }
2671
2672 if (rtd->dai_link->capture_only) {
2673 playback = 0;
2674 capture = 1;
2675 }
2676
2677 /* create the PCM */
2678 if (rtd->dai_link->no_pcm) {
2679 snprintf(new_name, sizeof(new_name), "(%s)",
2680 rtd->dai_link->stream_name);
2681
2682 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2683 playback, capture, &pcm);
2684 } else {
2685 if (rtd->dai_link->dynamic)
2686 snprintf(new_name, sizeof(new_name), "%s (*)",
2687 rtd->dai_link->stream_name);
2688 else
2689 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2690 rtd->dai_link->stream_name,
2691 (rtd->num_codecs > 1) ?
2692 "multicodec" : rtd->codec_dai->name, num);
2693
2694 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2695 capture, &pcm);
2696 }
2697 if (ret < 0) {
2698 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2699 rtd->dai_link->name);
2700 return ret;
2701 }
2702 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2703
2704 /* DAPM dai link stream work */
2705 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2706
2707 pcm->nonatomic = rtd->dai_link->nonatomic;
2708 rtd->pcm = pcm;
2709 pcm->private_data = rtd;
2710
2711 if (rtd->dai_link->no_pcm) {
2712 if (playback)
2713 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2714 if (capture)
2715 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2716 goto out;
2717 }
2718
2719 /* ASoC PCM operations */
2720 if (rtd->dai_link->dynamic) {
2721 rtd->ops.open = dpcm_fe_dai_open;
2722 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2723 rtd->ops.prepare = dpcm_fe_dai_prepare;
2724 rtd->ops.trigger = dpcm_fe_dai_trigger;
2725 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2726 rtd->ops.close = dpcm_fe_dai_close;
2727 rtd->ops.pointer = soc_pcm_pointer;
2728 rtd->ops.ioctl = soc_pcm_ioctl;
2729 } else {
2730 rtd->ops.open = soc_pcm_open;
2731 rtd->ops.hw_params = soc_pcm_hw_params;
2732 rtd->ops.prepare = soc_pcm_prepare;
2733 rtd->ops.trigger = soc_pcm_trigger;
2734 rtd->ops.hw_free = soc_pcm_hw_free;
2735 rtd->ops.close = soc_pcm_close;
2736 rtd->ops.pointer = soc_pcm_pointer;
2737 rtd->ops.ioctl = soc_pcm_ioctl;
2738 }
2739
2740 if (platform->driver->ops) {
2741 rtd->ops.ack = platform->driver->ops->ack;
2742 rtd->ops.copy = platform->driver->ops->copy;
2743 rtd->ops.silence = platform->driver->ops->silence;
2744 rtd->ops.page = platform->driver->ops->page;
2745 rtd->ops.mmap = platform->driver->ops->mmap;
2746 }
2747
2748 if (playback)
2749 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2750
2751 if (capture)
2752 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2753
2754 if (platform->driver->pcm_new) {
2755 ret = platform->driver->pcm_new(rtd);
2756 if (ret < 0) {
2757 dev_err(platform->dev,
2758 "ASoC: pcm constructor failed: %d\n",
2759 ret);
2760 return ret;
2761 }
2762 }
2763
2764 pcm->private_free = platform->driver->pcm_free;
2765 out:
2766 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2767 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2768 cpu_dai->name);
2769 return ret;
2770 }
2771
2772 /* is the current PCM operation for this FE ? */
2773 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2774 {
2775 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2776 return 1;
2777 return 0;
2778 }
2779 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2780
2781 /* is the current PCM operation for this BE ? */
2782 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2783 struct snd_soc_pcm_runtime *be, int stream)
2784 {
2785 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2786 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2787 be->dpcm[stream].runtime_update))
2788 return 1;
2789 return 0;
2790 }
2791 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2792
2793 /* get the substream for this BE */
2794 struct snd_pcm_substream *
2795 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2796 {
2797 return be->pcm->streams[stream].substream;
2798 }
2799 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2800
2801 /* get the BE runtime state */
2802 enum snd_soc_dpcm_state
2803 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2804 {
2805 return be->dpcm[stream].state;
2806 }
2807 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2808
2809 /* set the BE runtime state */
2810 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2811 int stream, enum snd_soc_dpcm_state state)
2812 {
2813 be->dpcm[stream].state = state;
2814 }
2815 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2816
2817 /*
2818 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2819 * are not running, paused or suspended for the specified stream direction.
2820 */
2821 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2822 struct snd_soc_pcm_runtime *be, int stream)
2823 {
2824 struct snd_soc_dpcm *dpcm;
2825 int state;
2826
2827 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2828
2829 if (dpcm->fe == fe)
2830 continue;
2831
2832 state = dpcm->fe->dpcm[stream].state;
2833 if (state == SND_SOC_DPCM_STATE_START ||
2834 state == SND_SOC_DPCM_STATE_PAUSED ||
2835 state == SND_SOC_DPCM_STATE_SUSPEND)
2836 return 0;
2837 }
2838
2839 /* it's safe to free/stop this BE DAI */
2840 return 1;
2841 }
2842 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2843
2844 /*
2845 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2846 * running, paused or suspended for the specified stream direction.
2847 */
2848 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2849 struct snd_soc_pcm_runtime *be, int stream)
2850 {
2851 struct snd_soc_dpcm *dpcm;
2852 int state;
2853
2854 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2855
2856 if (dpcm->fe == fe)
2857 continue;
2858
2859 state = dpcm->fe->dpcm[stream].state;
2860 if (state == SND_SOC_DPCM_STATE_START ||
2861 state == SND_SOC_DPCM_STATE_PAUSED ||
2862 state == SND_SOC_DPCM_STATE_SUSPEND ||
2863 state == SND_SOC_DPCM_STATE_PREPARE)
2864 return 0;
2865 }
2866
2867 /* it's safe to change hw_params */
2868 return 1;
2869 }
2870 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2871
2872 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2873 int cmd, struct snd_soc_platform *platform)
2874 {
2875 if (platform->driver->ops && platform->driver->ops->trigger)
2876 return platform->driver->ops->trigger(substream, cmd);
2877 return 0;
2878 }
2879 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2880
2881 #ifdef CONFIG_DEBUG_FS
2882 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2883 {
2884 switch (state) {
2885 case SND_SOC_DPCM_STATE_NEW:
2886 return "new";
2887 case SND_SOC_DPCM_STATE_OPEN:
2888 return "open";
2889 case SND_SOC_DPCM_STATE_HW_PARAMS:
2890 return "hw_params";
2891 case SND_SOC_DPCM_STATE_PREPARE:
2892 return "prepare";
2893 case SND_SOC_DPCM_STATE_START:
2894 return "start";
2895 case SND_SOC_DPCM_STATE_STOP:
2896 return "stop";
2897 case SND_SOC_DPCM_STATE_SUSPEND:
2898 return "suspend";
2899 case SND_SOC_DPCM_STATE_PAUSED:
2900 return "paused";
2901 case SND_SOC_DPCM_STATE_HW_FREE:
2902 return "hw_free";
2903 case SND_SOC_DPCM_STATE_CLOSE:
2904 return "close";
2905 }
2906
2907 return "unknown";
2908 }
2909
2910 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2911 int stream, char *buf, size_t size)
2912 {
2913 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2914 struct snd_soc_dpcm *dpcm;
2915 ssize_t offset = 0;
2916
2917 /* FE state */
2918 offset += snprintf(buf + offset, size - offset,
2919 "[%s - %s]\n", fe->dai_link->name,
2920 stream ? "Capture" : "Playback");
2921
2922 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2923 dpcm_state_string(fe->dpcm[stream].state));
2924
2925 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2926 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2927 offset += snprintf(buf + offset, size - offset,
2928 "Hardware Params: "
2929 "Format = %s, Channels = %d, Rate = %d\n",
2930 snd_pcm_format_name(params_format(params)),
2931 params_channels(params),
2932 params_rate(params));
2933
2934 /* BEs state */
2935 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2936
2937 if (list_empty(&fe->dpcm[stream].be_clients)) {
2938 offset += snprintf(buf + offset, size - offset,
2939 " No active DSP links\n");
2940 goto out;
2941 }
2942
2943 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2944 struct snd_soc_pcm_runtime *be = dpcm->be;
2945 params = &dpcm->hw_params;
2946
2947 offset += snprintf(buf + offset, size - offset,
2948 "- %s\n", be->dai_link->name);
2949
2950 offset += snprintf(buf + offset, size - offset,
2951 " State: %s\n",
2952 dpcm_state_string(be->dpcm[stream].state));
2953
2954 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2955 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2956 offset += snprintf(buf + offset, size - offset,
2957 " Hardware Params: "
2958 "Format = %s, Channels = %d, Rate = %d\n",
2959 snd_pcm_format_name(params_format(params)),
2960 params_channels(params),
2961 params_rate(params));
2962 }
2963
2964 out:
2965 return offset;
2966 }
2967
2968 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2969 size_t count, loff_t *ppos)
2970 {
2971 struct snd_soc_pcm_runtime *fe = file->private_data;
2972 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2973 char *buf;
2974
2975 buf = kmalloc(out_count, GFP_KERNEL);
2976 if (!buf)
2977 return -ENOMEM;
2978
2979 if (fe->cpu_dai->driver->playback.channels_min)
2980 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2981 buf + offset, out_count - offset);
2982
2983 if (fe->cpu_dai->driver->capture.channels_min)
2984 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2985 buf + offset, out_count - offset);
2986
2987 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2988
2989 kfree(buf);
2990 return ret;
2991 }
2992
2993 static const struct file_operations dpcm_state_fops = {
2994 .open = simple_open,
2995 .read = dpcm_state_read_file,
2996 .llseek = default_llseek,
2997 };
2998
2999 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3000 {
3001 if (!rtd->dai_link)
3002 return;
3003
3004 if (!rtd->card->debugfs_card_root)
3005 return;
3006
3007 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3008 rtd->card->debugfs_card_root);
3009 if (!rtd->debugfs_dpcm_root) {
3010 dev_dbg(rtd->dev,
3011 "ASoC: Failed to create dpcm debugfs directory %s\n",
3012 rtd->dai_link->name);
3013 return;
3014 }
3015
3016 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
3017 rtd->debugfs_dpcm_root,
3018 rtd, &dpcm_state_fops);
3019 }
3020 #endif
Linux kernel - Deliverables
This page took 0.10008 seconds and 5 git commands to generate.