2 * soc-pcm.c -- ALSA SoC PCM
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/slab.h>
24 #include <linux/workqueue.h>
25 #include <linux/export.h>
26 #include <linux/debugfs.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/pcm_params.h>
30 #include <sound/soc.h>
31 #include <sound/soc-dpcm.h>
32 #include <sound/initval.h>
34 #define DPCM_MAX_BE_USERS 8
36 /* DPCM stream event, send event to FE and all active BEs. */
37 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
40 struct snd_soc_dpcm *dpcm;
42 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
44 struct snd_soc_pcm_runtime *be = dpcm->be;
46 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
47 be->dai_link->name, event, dir);
49 snd_soc_dapm_stream_event(be, dir, event);
52 snd_soc_dapm_stream_event(fe, dir, event);
57 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
58 struct snd_soc_dai *soc_dai)
60 struct snd_soc_pcm_runtime *rtd = substream->private_data;
63 if (!soc_dai->driver->symmetric_rates &&
64 !rtd->dai_link->symmetric_rates)
67 /* This can happen if multiple streams are starting simultaneously -
68 * the second can need to get its constraints before the first has
69 * picked a rate. Complain and allow the application to carry on.
72 dev_warn(soc_dai->dev,
73 "ASoC: Not enforcing symmetric_rates due to race\n");
77 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", soc_dai->rate);
79 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
80 SNDRV_PCM_HW_PARAM_RATE,
81 soc_dai->rate, soc_dai->rate);
84 "ASoC: Unable to apply rate symmetry constraint: %d\n",
93 * List of sample sizes that might go over the bus for parameter
94 * application. There ought to be a wildcard sample size for things
95 * like the DAC/ADC resolution to use but there isn't right now.
97 static int sample_sizes[] = {
101 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
102 struct snd_soc_dai *dai)
106 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
107 bits = dai->driver->playback.sig_bits;
109 bits = dai->driver->capture.sig_bits;
114 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
115 if (bits >= sample_sizes[i])
118 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
119 sample_sizes[i], bits);
122 "ASoC: Failed to set MSB %d/%d: %d\n",
123 bits, sample_sizes[i], ret);
128 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
129 * then initialized and any private data can be allocated. This also calls
130 * startup for the cpu DAI, platform, machine and codec DAI.
132 static int soc_pcm_open(struct snd_pcm_substream *substream)
134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
135 struct snd_pcm_runtime *runtime = substream->runtime;
136 struct snd_soc_platform *platform = rtd->platform;
137 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
138 struct snd_soc_dai *codec_dai = rtd->codec_dai;
139 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
140 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
143 pm_runtime_get_sync(cpu_dai->dev);
144 pm_runtime_get_sync(codec_dai->dev);
145 pm_runtime_get_sync(platform->dev);
147 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
149 /* startup the audio subsystem */
150 if (cpu_dai->driver->ops->startup) {
151 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
153 dev_err(cpu_dai->dev, "ASoC: can't open interface"
154 " %s: %d\n", cpu_dai->name, ret);
159 if (platform->driver->ops && platform->driver->ops->open) {
160 ret = platform->driver->ops->open(substream);
162 dev_err(platform->dev, "ASoC: can't open platform"
163 " %s: %d\n", platform->name, ret);
168 if (codec_dai->driver->ops->startup) {
169 ret = codec_dai->driver->ops->startup(substream, codec_dai);
171 dev_err(codec_dai->dev, "ASoC: can't open codec"
172 " %s: %d\n", codec_dai->name, ret);
177 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
178 ret = rtd->dai_link->ops->startup(substream);
180 pr_err("ASoC: %s startup failed: %d\n",
181 rtd->dai_link->name, ret);
186 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
187 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
190 /* Check that the codec and cpu DAIs are compatible */
191 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
192 runtime->hw.rate_min =
193 max(codec_dai_drv->playback.rate_min,
194 cpu_dai_drv->playback.rate_min);
195 runtime->hw.rate_max =
196 min(codec_dai_drv->playback.rate_max,
197 cpu_dai_drv->playback.rate_max);
198 runtime->hw.channels_min =
199 max(codec_dai_drv->playback.channels_min,
200 cpu_dai_drv->playback.channels_min);
201 runtime->hw.channels_max =
202 min(codec_dai_drv->playback.channels_max,
203 cpu_dai_drv->playback.channels_max);
204 runtime->hw.formats =
205 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
207 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
208 if (codec_dai_drv->playback.rates
209 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
210 runtime->hw.rates |= cpu_dai_drv->playback.rates;
211 if (cpu_dai_drv->playback.rates
212 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
213 runtime->hw.rates |= codec_dai_drv->playback.rates;
215 runtime->hw.rate_min =
216 max(codec_dai_drv->capture.rate_min,
217 cpu_dai_drv->capture.rate_min);
218 runtime->hw.rate_max =
219 min(codec_dai_drv->capture.rate_max,
220 cpu_dai_drv->capture.rate_max);
221 runtime->hw.channels_min =
222 max(codec_dai_drv->capture.channels_min,
223 cpu_dai_drv->capture.channels_min);
224 runtime->hw.channels_max =
225 min(codec_dai_drv->capture.channels_max,
226 cpu_dai_drv->capture.channels_max);
227 runtime->hw.formats =
228 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
230 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
231 if (codec_dai_drv->capture.rates
232 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
233 runtime->hw.rates |= cpu_dai_drv->capture.rates;
234 if (cpu_dai_drv->capture.rates
235 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
236 runtime->hw.rates |= codec_dai_drv->capture.rates;
240 snd_pcm_limit_hw_rates(runtime);
241 if (!runtime->hw.rates) {
242 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
243 codec_dai->name, cpu_dai->name);
246 if (!runtime->hw.formats) {
247 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
248 codec_dai->name, cpu_dai->name);
251 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
252 runtime->hw.channels_min > runtime->hw.channels_max) {
253 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
254 codec_dai->name, cpu_dai->name);
258 soc_pcm_apply_msb(substream, codec_dai);
259 soc_pcm_apply_msb(substream, cpu_dai);
261 /* Symmetry only applies if we've already got an active stream. */
262 if (cpu_dai->active) {
263 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
268 if (codec_dai->active) {
269 ret = soc_pcm_apply_symmetry(substream, codec_dai);
274 pr_debug("ASoC: %s <-> %s info:\n",
275 codec_dai->name, cpu_dai->name);
276 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
277 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
278 runtime->hw.channels_max);
279 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
280 runtime->hw.rate_max);
283 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
284 cpu_dai->playback_active++;
285 codec_dai->playback_active++;
287 cpu_dai->capture_active++;
288 codec_dai->capture_active++;
292 rtd->codec->active++;
293 mutex_unlock(&rtd->pcm_mutex);
297 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
298 rtd->dai_link->ops->shutdown(substream);
301 if (codec_dai->driver->ops->shutdown)
302 codec_dai->driver->ops->shutdown(substream, codec_dai);
305 if (platform->driver->ops && platform->driver->ops->close)
306 platform->driver->ops->close(substream);
309 if (cpu_dai->driver->ops->shutdown)
310 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
312 mutex_unlock(&rtd->pcm_mutex);
314 pm_runtime_put(platform->dev);
315 pm_runtime_put(codec_dai->dev);
316 pm_runtime_put(cpu_dai->dev);
322 * Power down the audio subsystem pmdown_time msecs after close is called.
323 * This is to ensure there are no pops or clicks in between any music tracks
324 * due to DAPM power cycling.
326 static void close_delayed_work(struct work_struct *work)
328 struct snd_soc_pcm_runtime *rtd =
329 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
330 struct snd_soc_dai *codec_dai = rtd->codec_dai;
332 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
334 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
335 codec_dai->driver->playback.stream_name,
336 codec_dai->playback_active ? "active" : "inactive",
337 rtd->pop_wait ? "yes" : "no");
339 /* are we waiting on this codec DAI stream */
340 if (rtd->pop_wait == 1) {
342 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
343 SND_SOC_DAPM_STREAM_STOP);
346 mutex_unlock(&rtd->pcm_mutex);
350 * Called by ALSA when a PCM substream is closed. Private data can be
351 * freed here. The cpu DAI, codec DAI, machine and platform are also
354 static int soc_pcm_close(struct snd_pcm_substream *substream)
356 struct snd_soc_pcm_runtime *rtd = substream->private_data;
357 struct snd_soc_platform *platform = rtd->platform;
358 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
359 struct snd_soc_dai *codec_dai = rtd->codec_dai;
360 struct snd_soc_codec *codec = rtd->codec;
362 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
365 cpu_dai->playback_active--;
366 codec_dai->playback_active--;
368 cpu_dai->capture_active--;
369 codec_dai->capture_active--;
376 /* clear the corresponding DAIs rate when inactive */
377 if (!cpu_dai->active)
380 if (!codec_dai->active)
383 /* Muting the DAC suppresses artifacts caused during digital
384 * shutdown, for example from stopping clocks.
386 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
388 if (cpu_dai->driver->ops->shutdown)
389 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
391 if (codec_dai->driver->ops->shutdown)
392 codec_dai->driver->ops->shutdown(substream, codec_dai);
394 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
395 rtd->dai_link->ops->shutdown(substream);
397 if (platform->driver->ops && platform->driver->ops->close)
398 platform->driver->ops->close(substream);
399 cpu_dai->runtime = NULL;
401 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
402 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
403 rtd->dai_link->ignore_pmdown_time) {
404 /* powered down playback stream now */
405 snd_soc_dapm_stream_event(rtd,
406 SNDRV_PCM_STREAM_PLAYBACK,
407 SND_SOC_DAPM_STREAM_STOP);
409 /* start delayed pop wq here for playback streams */
411 queue_delayed_work(system_power_efficient_wq,
413 msecs_to_jiffies(rtd->pmdown_time));
416 /* capture streams can be powered down now */
417 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
418 SND_SOC_DAPM_STREAM_STOP);
421 mutex_unlock(&rtd->pcm_mutex);
423 pm_runtime_put(platform->dev);
424 pm_runtime_put(codec_dai->dev);
425 pm_runtime_put(cpu_dai->dev);
431 * Called by ALSA when the PCM substream is prepared, can set format, sample
432 * rate, etc. This function is non atomic and can be called multiple times,
433 * it can refer to the runtime info.
435 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
437 struct snd_soc_pcm_runtime *rtd = substream->private_data;
438 struct snd_soc_platform *platform = rtd->platform;
439 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
440 struct snd_soc_dai *codec_dai = rtd->codec_dai;
443 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
445 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
446 ret = rtd->dai_link->ops->prepare(substream);
448 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
454 if (platform->driver->ops && platform->driver->ops->prepare) {
455 ret = platform->driver->ops->prepare(substream);
457 dev_err(platform->dev, "ASoC: platform prepare error:"
463 if (codec_dai->driver->ops->prepare) {
464 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
466 dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
472 if (cpu_dai->driver->ops->prepare) {
473 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
475 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
481 /* cancel any delayed stream shutdown that is pending */
482 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
485 cancel_delayed_work(&rtd->delayed_work);
488 snd_soc_dapm_stream_event(rtd, substream->stream,
489 SND_SOC_DAPM_STREAM_START);
491 snd_soc_dai_digital_mute(codec_dai, 0, substream->stream);
494 mutex_unlock(&rtd->pcm_mutex);
499 * Called by ALSA when the hardware params are set by application. This
500 * function can also be called multiple times and can allocate buffers
501 * (using snd_pcm_lib_* ). It's non-atomic.
503 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
504 struct snd_pcm_hw_params *params)
506 struct snd_soc_pcm_runtime *rtd = substream->private_data;
507 struct snd_soc_platform *platform = rtd->platform;
508 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
509 struct snd_soc_dai *codec_dai = rtd->codec_dai;
512 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
514 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
515 ret = rtd->dai_link->ops->hw_params(substream, params);
517 dev_err(rtd->card->dev, "ASoC: machine hw_params"
518 " failed: %d\n", ret);
523 if (codec_dai->driver->ops->hw_params) {
524 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
526 dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
527 " %d\n", codec_dai->name, ret);
532 if (cpu_dai->driver->ops->hw_params) {
533 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
535 dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
541 if (platform->driver->ops && platform->driver->ops->hw_params) {
542 ret = platform->driver->ops->hw_params(substream, params);
544 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
545 platform->name, ret);
550 /* store the rate for each DAIs */
551 cpu_dai->rate = params_rate(params);
552 codec_dai->rate = params_rate(params);
555 mutex_unlock(&rtd->pcm_mutex);
559 if (cpu_dai->driver->ops->hw_free)
560 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
563 if (codec_dai->driver->ops->hw_free)
564 codec_dai->driver->ops->hw_free(substream, codec_dai);
567 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
568 rtd->dai_link->ops->hw_free(substream);
570 mutex_unlock(&rtd->pcm_mutex);
575 * Frees resources allocated by hw_params, can be called multiple times
577 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
579 struct snd_soc_pcm_runtime *rtd = substream->private_data;
580 struct snd_soc_platform *platform = rtd->platform;
581 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
582 struct snd_soc_dai *codec_dai = rtd->codec_dai;
583 struct snd_soc_codec *codec = rtd->codec;
585 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
587 /* apply codec digital mute */
589 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
591 /* free any machine hw params */
592 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
593 rtd->dai_link->ops->hw_free(substream);
595 /* free any DMA resources */
596 if (platform->driver->ops && platform->driver->ops->hw_free)
597 platform->driver->ops->hw_free(substream);
599 /* now free hw params for the DAIs */
600 if (codec_dai->driver->ops->hw_free)
601 codec_dai->driver->ops->hw_free(substream, codec_dai);
603 if (cpu_dai->driver->ops->hw_free)
604 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
606 mutex_unlock(&rtd->pcm_mutex);
610 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
612 struct snd_soc_pcm_runtime *rtd = substream->private_data;
613 struct snd_soc_platform *platform = rtd->platform;
614 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
615 struct snd_soc_dai *codec_dai = rtd->codec_dai;
618 if (codec_dai->driver->ops->trigger) {
619 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
624 if (platform->driver->ops && platform->driver->ops->trigger) {
625 ret = platform->driver->ops->trigger(substream, cmd);
630 if (cpu_dai->driver->ops->trigger) {
631 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
638 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
641 struct snd_soc_pcm_runtime *rtd = substream->private_data;
642 struct snd_soc_platform *platform = rtd->platform;
643 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
644 struct snd_soc_dai *codec_dai = rtd->codec_dai;
647 if (codec_dai->driver->ops->bespoke_trigger) {
648 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
653 if (platform->driver->bespoke_trigger) {
654 ret = platform->driver->bespoke_trigger(substream, cmd);
659 if (cpu_dai->driver->ops->bespoke_trigger) {
660 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
667 * soc level wrapper for pointer callback
668 * If cpu_dai, codec_dai, platform driver has the delay callback, than
669 * the runtime->delay will be updated accordingly.
671 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
673 struct snd_soc_pcm_runtime *rtd = substream->private_data;
674 struct snd_soc_platform *platform = rtd->platform;
675 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
676 struct snd_soc_dai *codec_dai = rtd->codec_dai;
677 struct snd_pcm_runtime *runtime = substream->runtime;
678 snd_pcm_uframes_t offset = 0;
679 snd_pcm_sframes_t delay = 0;
681 if (platform->driver->ops && platform->driver->ops->pointer)
682 offset = platform->driver->ops->pointer(substream);
684 if (cpu_dai->driver->ops->delay)
685 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
687 if (codec_dai->driver->ops->delay)
688 delay += codec_dai->driver->ops->delay(substream, codec_dai);
690 if (platform->driver->delay)
691 delay += platform->driver->delay(substream, codec_dai);
693 runtime->delay = delay;
698 /* connect a FE and BE */
699 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
700 struct snd_soc_pcm_runtime *be, int stream)
702 struct snd_soc_dpcm *dpcm;
704 /* only add new dpcms */
705 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
706 if (dpcm->be == be && dpcm->fe == fe)
710 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
716 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
717 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
718 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
719 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
721 dev_dbg(fe->dev, " connected new DPCM %s path %s %s %s\n",
722 stream ? "capture" : "playback", fe->dai_link->name,
723 stream ? "<-" : "->", be->dai_link->name);
725 #ifdef CONFIG_DEBUG_FS
726 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
727 fe->debugfs_dpcm_root, &dpcm->state);
732 /* reparent a BE onto another FE */
733 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
734 struct snd_soc_pcm_runtime *be, int stream)
736 struct snd_soc_dpcm *dpcm;
737 struct snd_pcm_substream *fe_substream, *be_substream;
739 /* reparent if BE is connected to other FEs */
740 if (!be->dpcm[stream].users)
743 be_substream = snd_soc_dpcm_get_substream(be, stream);
745 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
749 dev_dbg(fe->dev, " reparent %s path %s %s %s\n",
750 stream ? "capture" : "playback",
751 dpcm->fe->dai_link->name,
752 stream ? "<-" : "->", dpcm->be->dai_link->name);
754 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
755 be_substream->runtime = fe_substream->runtime;
760 /* disconnect a BE and FE */
761 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
763 struct snd_soc_dpcm *dpcm, *d;
765 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
766 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
767 stream ? "capture" : "playback",
768 dpcm->be->dai_link->name);
770 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
773 dev_dbg(fe->dev, " freed DSP %s path %s %s %s\n",
774 stream ? "capture" : "playback", fe->dai_link->name,
775 stream ? "<-" : "->", dpcm->be->dai_link->name);
777 /* BEs still alive need new FE */
778 dpcm_be_reparent(fe, dpcm->be, stream);
780 #ifdef CONFIG_DEBUG_FS
781 debugfs_remove(dpcm->debugfs_state);
783 list_del(&dpcm->list_be);
784 list_del(&dpcm->list_fe);
789 /* get BE for DAI widget and stream */
790 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
791 struct snd_soc_dapm_widget *widget, int stream)
793 struct snd_soc_pcm_runtime *be;
796 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
797 for (i = 0; i < card->num_links; i++) {
800 if (!be->dai_link->no_pcm)
803 if (be->cpu_dai->playback_widget == widget ||
804 be->codec_dai->playback_widget == widget)
809 for (i = 0; i < card->num_links; i++) {
812 if (!be->dai_link->no_pcm)
815 if (be->cpu_dai->capture_widget == widget ||
816 be->codec_dai->capture_widget == widget)
821 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
822 stream ? "capture" : "playback", widget->name);
826 static inline struct snd_soc_dapm_widget *
827 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
829 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
830 return rtd->cpu_dai->playback_widget;
832 return rtd->cpu_dai->capture_widget;
835 static inline struct snd_soc_dapm_widget *
836 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
838 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
839 return rtd->codec_dai->playback_widget;
841 return rtd->codec_dai->capture_widget;
844 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
845 struct snd_soc_dapm_widget *widget)
849 for (i = 0; i < list->num_widgets; i++) {
850 if (widget == list->widgets[i])
857 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
858 int stream, struct snd_soc_dapm_widget_list **list_)
860 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
861 struct snd_soc_dapm_widget_list *list;
864 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
865 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
869 /* get number of valid DAI paths and their widgets */
870 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
872 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
873 stream ? "capture" : "playback");
879 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
880 struct snd_soc_dapm_widget_list **list_)
882 struct snd_soc_dpcm *dpcm;
883 struct snd_soc_dapm_widget_list *list = *list_;
884 struct snd_soc_dapm_widget *widget;
887 /* Destroy any old FE <--> BE connections */
888 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
890 /* is there a valid CPU DAI widget for this BE */
891 widget = rtd_get_cpu_widget(dpcm->be, stream);
893 /* prune the BE if it's no longer in our active list */
894 if (widget && widget_in_list(list, widget))
897 /* is there a valid CODEC DAI widget for this BE */
898 widget = rtd_get_codec_widget(dpcm->be, stream);
900 /* prune the BE if it's no longer in our active list */
901 if (widget && widget_in_list(list, widget))
904 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
905 stream ? "capture" : "playback",
906 dpcm->be->dai_link->name, fe->dai_link->name);
907 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
908 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
912 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
916 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
917 struct snd_soc_dapm_widget_list **list_)
919 struct snd_soc_card *card = fe->card;
920 struct snd_soc_dapm_widget_list *list = *list_;
921 struct snd_soc_pcm_runtime *be;
924 /* Create any new FE <--> BE connections */
925 for (i = 0; i < list->num_widgets; i++) {
927 switch (list->widgets[i]->id) {
928 case snd_soc_dapm_dai_in:
929 case snd_soc_dapm_dai_out:
935 /* is there a valid BE rtd for this widget */
936 be = dpcm_get_be(card, list->widgets[i], stream);
938 dev_err(fe->dev, "ASoC: no BE found for %s\n",
939 list->widgets[i]->name);
943 /* make sure BE is a real BE */
944 if (!be->dai_link->no_pcm)
947 /* don't connect if FE is not running */
948 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
951 /* newly connected FE and BE */
952 err = dpcm_be_connect(fe, be, stream);
954 dev_err(fe->dev, "ASoC: can't connect %s\n",
955 list->widgets[i]->name);
957 } else if (err == 0) /* already connected */
961 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
965 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
970 * Find the corresponding BE DAIs that source or sink audio to this
973 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
974 int stream, struct snd_soc_dapm_widget_list **list, int new)
977 return dpcm_add_paths(fe, stream, list);
979 return dpcm_prune_paths(fe, stream, list);
982 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
984 struct snd_soc_dpcm *dpcm;
986 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
987 dpcm->be->dpcm[stream].runtime_update =
988 SND_SOC_DPCM_UPDATE_NO;
991 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
994 struct snd_soc_dpcm *dpcm;
996 /* disable any enabled and non active backends */
997 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
999 struct snd_soc_pcm_runtime *be = dpcm->be;
1000 struct snd_pcm_substream *be_substream =
1001 snd_soc_dpcm_get_substream(be, stream);
1003 if (be->dpcm[stream].users == 0)
1004 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1005 stream ? "capture" : "playback",
1006 be->dpcm[stream].state);
1008 if (--be->dpcm[stream].users != 0)
1011 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1014 soc_pcm_close(be_substream);
1015 be_substream->runtime = NULL;
1016 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1020 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1022 struct snd_soc_dpcm *dpcm;
1025 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1026 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1028 struct snd_soc_pcm_runtime *be = dpcm->be;
1029 struct snd_pcm_substream *be_substream =
1030 snd_soc_dpcm_get_substream(be, stream);
1032 /* is this op for this BE ? */
1033 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1036 /* first time the dpcm is open ? */
1037 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1038 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1039 stream ? "capture" : "playback",
1040 be->dpcm[stream].state);
1042 if (be->dpcm[stream].users++ != 0)
1045 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1046 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1049 dev_dbg(be->dev, "ASoC: open BE %s\n", be->dai_link->name);
1051 be_substream->runtime = be->dpcm[stream].runtime;
1052 err = soc_pcm_open(be_substream);
1054 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1055 be->dpcm[stream].users--;
1056 if (be->dpcm[stream].users < 0)
1057 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1058 stream ? "capture" : "playback",
1059 be->dpcm[stream].state);
1061 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1065 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1072 /* disable any enabled and non active backends */
1073 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1074 struct snd_soc_pcm_runtime *be = dpcm->be;
1075 struct snd_pcm_substream *be_substream =
1076 snd_soc_dpcm_get_substream(be, stream);
1078 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1081 if (be->dpcm[stream].users == 0)
1082 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1083 stream ? "capture" : "playback",
1084 be->dpcm[stream].state);
1086 if (--be->dpcm[stream].users != 0)
1089 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1092 soc_pcm_close(be_substream);
1093 be_substream->runtime = NULL;
1094 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1100 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1102 struct snd_pcm_runtime *runtime = substream->runtime;
1103 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1104 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1105 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1107 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1108 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
1109 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
1110 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
1111 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
1112 runtime->hw.formats &= cpu_dai_drv->playback.formats;
1113 runtime->hw.rates = cpu_dai_drv->playback.rates;
1115 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
1116 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
1117 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
1118 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
1119 runtime->hw.formats &= cpu_dai_drv->capture.formats;
1120 runtime->hw.rates = cpu_dai_drv->capture.rates;
1124 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1126 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1127 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1128 int stream = fe_substream->stream, ret = 0;
1130 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1132 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1134 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1138 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1140 /* start the DAI frontend */
1141 ret = soc_pcm_open(fe_substream);
1143 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1147 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1149 dpcm_set_fe_runtime(fe_substream);
1150 snd_pcm_limit_hw_rates(runtime);
1152 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1156 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1158 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1162 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1164 struct snd_soc_dpcm *dpcm;
1166 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1167 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1169 struct snd_soc_pcm_runtime *be = dpcm->be;
1170 struct snd_pcm_substream *be_substream =
1171 snd_soc_dpcm_get_substream(be, stream);
1173 /* is this op for this BE ? */
1174 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1177 if (be->dpcm[stream].users == 0)
1178 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1179 stream ? "capture" : "playback",
1180 be->dpcm[stream].state);
1182 if (--be->dpcm[stream].users != 0)
1185 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1186 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1189 dev_dbg(be->dev, "ASoC: close BE %s\n",
1190 dpcm->fe->dai_link->name);
1192 soc_pcm_close(be_substream);
1193 be_substream->runtime = NULL;
1195 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1200 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1202 struct snd_soc_pcm_runtime *fe = substream->private_data;
1203 int stream = substream->stream;
1205 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1207 /* shutdown the BEs */
1208 dpcm_be_dai_shutdown(fe, substream->stream);
1210 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1212 /* now shutdown the frontend */
1213 soc_pcm_close(substream);
1215 /* run the stream event for each BE */
1216 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1218 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1219 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1223 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1225 struct snd_soc_dpcm *dpcm;
1227 /* only hw_params backends that are either sinks or sources
1228 * to this frontend DAI */
1229 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1231 struct snd_soc_pcm_runtime *be = dpcm->be;
1232 struct snd_pcm_substream *be_substream =
1233 snd_soc_dpcm_get_substream(be, stream);
1235 /* is this op for this BE ? */
1236 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1239 /* only free hw when no longer used - check all FEs */
1240 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1243 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1244 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1245 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1246 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1247 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1250 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1251 dpcm->fe->dai_link->name);
1253 soc_pcm_hw_free(be_substream);
1255 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1261 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1263 struct snd_soc_pcm_runtime *fe = substream->private_data;
1264 int err, stream = substream->stream;
1266 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1267 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1269 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1271 /* call hw_free on the frontend */
1272 err = soc_pcm_hw_free(substream);
1274 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1275 fe->dai_link->name);
1277 /* only hw_params backends that are either sinks or sources
1278 * to this frontend DAI */
1279 err = dpcm_be_dai_hw_free(fe, stream);
1281 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1282 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1284 mutex_unlock(&fe->card->mutex);
1288 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1290 struct snd_soc_dpcm *dpcm;
1293 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1295 struct snd_soc_pcm_runtime *be = dpcm->be;
1296 struct snd_pcm_substream *be_substream =
1297 snd_soc_dpcm_get_substream(be, stream);
1299 /* is this op for this BE ? */
1300 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1303 /* only allow hw_params() if no connected FEs are running */
1304 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1307 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1308 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1309 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1312 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1313 dpcm->fe->dai_link->name);
1315 /* copy params for each dpcm */
1316 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1317 sizeof(struct snd_pcm_hw_params));
1319 /* perform any hw_params fixups */
1320 if (be->dai_link->be_hw_params_fixup) {
1321 ret = be->dai_link->be_hw_params_fixup(be,
1325 "ASoC: hw_params BE fixup failed %d\n",
1331 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1333 dev_err(dpcm->be->dev,
1334 "ASoC: hw_params BE failed %d\n", ret);
1338 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1343 /* disable any enabled and non active backends */
1344 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1345 struct snd_soc_pcm_runtime *be = dpcm->be;
1346 struct snd_pcm_substream *be_substream =
1347 snd_soc_dpcm_get_substream(be, stream);
1349 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1352 /* only allow hw_free() if no connected FEs are running */
1353 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1356 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1357 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1358 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1359 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1362 soc_pcm_hw_free(be_substream);
1368 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1369 struct snd_pcm_hw_params *params)
1371 struct snd_soc_pcm_runtime *fe = substream->private_data;
1372 int ret, stream = substream->stream;
1374 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1375 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1377 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1378 sizeof(struct snd_pcm_hw_params));
1379 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1381 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1385 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1386 fe->dai_link->name, params_rate(params),
1387 params_channels(params), params_format(params));
1389 /* call hw_params on the frontend */
1390 ret = soc_pcm_hw_params(substream, params);
1392 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1393 dpcm_be_dai_hw_free(fe, stream);
1395 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1398 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1399 mutex_unlock(&fe->card->mutex);
1403 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1404 struct snd_pcm_substream *substream, int cmd)
1408 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1409 dpcm->fe->dai_link->name, cmd);
1411 ret = soc_pcm_trigger(substream, cmd);
1413 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1418 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1421 struct snd_soc_dpcm *dpcm;
1424 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1426 struct snd_soc_pcm_runtime *be = dpcm->be;
1427 struct snd_pcm_substream *be_substream =
1428 snd_soc_dpcm_get_substream(be, stream);
1430 /* is this op for this BE ? */
1431 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1435 case SNDRV_PCM_TRIGGER_START:
1436 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1437 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1440 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1444 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1446 case SNDRV_PCM_TRIGGER_RESUME:
1447 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1450 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1454 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1456 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1457 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1460 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1464 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1466 case SNDRV_PCM_TRIGGER_STOP:
1467 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1470 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1473 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1477 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1479 case SNDRV_PCM_TRIGGER_SUSPEND:
1480 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1483 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1486 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1490 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1492 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1493 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1496 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1499 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1503 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1510 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1512 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1514 struct snd_soc_pcm_runtime *fe = substream->private_data;
1515 int stream = substream->stream, ret;
1516 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1518 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1521 case SND_SOC_DPCM_TRIGGER_PRE:
1522 /* call trigger on the frontend before the backend. */
1524 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1525 fe->dai_link->name, cmd);
1527 ret = soc_pcm_trigger(substream, cmd);
1529 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1533 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1535 case SND_SOC_DPCM_TRIGGER_POST:
1536 /* call trigger on the frontend after the backend. */
1538 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1540 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1544 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1545 fe->dai_link->name, cmd);
1547 ret = soc_pcm_trigger(substream, cmd);
1549 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1550 /* bespoke trigger() - handles both FE and BEs */
1552 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1553 fe->dai_link->name, cmd);
1555 ret = soc_pcm_bespoke_trigger(substream, cmd);
1557 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1562 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1563 fe->dai_link->name);
1569 case SNDRV_PCM_TRIGGER_START:
1570 case SNDRV_PCM_TRIGGER_RESUME:
1571 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1572 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1574 case SNDRV_PCM_TRIGGER_STOP:
1575 case SNDRV_PCM_TRIGGER_SUSPEND:
1576 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1577 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1582 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1586 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1588 struct snd_soc_dpcm *dpcm;
1591 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1593 struct snd_soc_pcm_runtime *be = dpcm->be;
1594 struct snd_pcm_substream *be_substream =
1595 snd_soc_dpcm_get_substream(be, stream);
1597 /* is this op for this BE ? */
1598 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1601 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1602 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1605 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
1606 dpcm->fe->dai_link->name);
1608 ret = soc_pcm_prepare(be_substream);
1610 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
1615 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1620 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1622 struct snd_soc_pcm_runtime *fe = substream->private_data;
1623 int stream = substream->stream, ret = 0;
1625 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1627 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
1629 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1631 /* there is no point preparing this FE if there are no BEs */
1632 if (list_empty(&fe->dpcm[stream].be_clients)) {
1633 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
1634 fe->dai_link->name);
1639 ret = dpcm_be_dai_prepare(fe, substream->stream);
1643 /* call prepare on the frontend */
1644 ret = soc_pcm_prepare(substream);
1646 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
1647 fe->dai_link->name);
1651 /* run the stream event for each BE */
1652 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1653 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1656 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1657 mutex_unlock(&fe->card->mutex);
1662 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1663 unsigned int cmd, void *arg)
1665 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1666 struct snd_soc_platform *platform = rtd->platform;
1668 if (platform->driver->ops->ioctl)
1669 return platform->driver->ops->ioctl(substream, cmd, arg);
1670 return snd_pcm_lib_ioctl(substream, cmd, arg);
1673 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1675 struct snd_pcm_substream *substream =
1676 snd_soc_dpcm_get_substream(fe, stream);
1677 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1680 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
1681 stream ? "capture" : "playback", fe->dai_link->name);
1683 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1684 /* call bespoke trigger - FE takes care of all BE triggers */
1685 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
1686 fe->dai_link->name);
1688 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1690 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1692 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
1693 fe->dai_link->name);
1695 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1697 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1700 err = dpcm_be_dai_hw_free(fe, stream);
1702 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
1704 err = dpcm_be_dai_shutdown(fe, stream);
1706 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
1708 /* run the stream event for each BE */
1709 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1714 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1716 struct snd_pcm_substream *substream =
1717 snd_soc_dpcm_get_substream(fe, stream);
1718 struct snd_soc_dpcm *dpcm;
1719 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1722 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
1723 stream ? "capture" : "playback", fe->dai_link->name);
1725 /* Only start the BE if the FE is ready */
1726 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1727 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1730 /* startup must always be called for new BEs */
1731 ret = dpcm_be_dai_startup(fe, stream);
1735 /* keep going if FE state is > open */
1736 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1739 ret = dpcm_be_dai_hw_params(fe, stream);
1743 /* keep going if FE state is > hw_params */
1744 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1748 ret = dpcm_be_dai_prepare(fe, stream);
1752 /* run the stream event for each BE */
1753 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1755 /* keep going if FE state is > prepare */
1756 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1757 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1760 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1761 /* call trigger on the frontend - FE takes care of all BE triggers */
1762 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
1763 fe->dai_link->name);
1765 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1767 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
1771 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
1772 fe->dai_link->name);
1774 ret = dpcm_be_dai_trigger(fe, stream,
1775 SNDRV_PCM_TRIGGER_START);
1777 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1785 dpcm_be_dai_hw_free(fe, stream);
1787 dpcm_be_dai_shutdown(fe, stream);
1789 /* disconnect any non started BEs */
1790 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1791 struct snd_soc_pcm_runtime *be = dpcm->be;
1792 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1793 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1799 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1803 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1804 ret = dpcm_run_update_startup(fe, stream);
1806 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
1807 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1812 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
1816 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1817 ret = dpcm_run_update_shutdown(fe, stream);
1819 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
1820 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1825 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
1828 int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *widget)
1830 struct snd_soc_card *card;
1831 int i, old, new, paths;
1834 card = widget->codec->card;
1835 else if (widget->platform)
1836 card = widget->platform->card;
1840 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1841 for (i = 0; i < card->num_rtd; i++) {
1842 struct snd_soc_dapm_widget_list *list;
1843 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
1845 /* make sure link is FE */
1846 if (!fe->dai_link->dynamic)
1849 /* only check active links */
1850 if (!fe->cpu_dai->active)
1853 /* DAPM sync will call this to update DSP paths */
1854 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
1855 fe->dai_link->name);
1857 /* skip if FE doesn't have playback capability */
1858 if (!fe->cpu_dai->driver->playback.channels_min)
1861 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
1863 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1864 fe->dai_link->name, "playback");
1865 mutex_unlock(&card->mutex);
1869 /* update any new playback paths */
1870 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
1872 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1873 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1874 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1877 /* update any old playback paths */
1878 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
1880 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1881 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1882 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1885 dpcm_path_put(&list);
1887 /* skip if FE doesn't have capture capability */
1888 if (!fe->cpu_dai->driver->capture.channels_min)
1891 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
1893 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1894 fe->dai_link->name, "capture");
1895 mutex_unlock(&card->mutex);
1899 /* update any new capture paths */
1900 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
1902 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1903 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1904 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1907 /* update any old capture paths */
1908 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
1910 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1911 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1912 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1915 dpcm_path_put(&list);
1918 mutex_unlock(&card->mutex);
1921 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
1923 struct snd_soc_dpcm *dpcm;
1924 struct list_head *clients =
1925 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
1927 list_for_each_entry(dpcm, clients, list_be) {
1929 struct snd_soc_pcm_runtime *be = dpcm->be;
1930 struct snd_soc_dai *dai = be->codec_dai;
1931 struct snd_soc_dai_driver *drv = dai->driver;
1933 if (be->dai_link->ignore_suspend)
1936 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
1938 if (drv->ops->digital_mute && dai->playback_active)
1939 drv->ops->digital_mute(dai, mute);
1945 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
1947 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1948 struct snd_soc_dpcm *dpcm;
1949 struct snd_soc_dapm_widget_list *list;
1951 int stream = fe_substream->stream;
1953 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1954 fe->dpcm[stream].runtime = fe_substream->runtime;
1956 if (dpcm_path_get(fe, stream, &list) <= 0) {
1957 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
1958 fe->dai_link->name, stream ? "capture" : "playback");
1961 /* calculate valid and active FE <-> BE dpcms */
1962 dpcm_process_paths(fe, stream, &list, 1);
1964 ret = dpcm_fe_dai_startup(fe_substream);
1966 /* clean up all links */
1967 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1968 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1970 dpcm_be_disconnect(fe, stream);
1971 fe->dpcm[stream].runtime = NULL;
1974 dpcm_clear_pending_state(fe, stream);
1975 dpcm_path_put(&list);
1976 mutex_unlock(&fe->card->mutex);
1980 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
1982 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1983 struct snd_soc_dpcm *dpcm;
1984 int stream = fe_substream->stream, ret;
1986 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1987 ret = dpcm_fe_dai_shutdown(fe_substream);
1989 /* mark FE's links ready to prune */
1990 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1991 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1993 dpcm_be_disconnect(fe, stream);
1995 fe->dpcm[stream].runtime = NULL;
1996 mutex_unlock(&fe->card->mutex);
2000 /* create a new pcm */
2001 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2003 struct snd_soc_platform *platform = rtd->platform;
2004 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2005 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2006 struct snd_pcm *pcm;
2008 int ret = 0, playback = 0, capture = 0;
2010 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2011 if (cpu_dai->driver->playback.channels_min)
2013 if (cpu_dai->driver->capture.channels_min)
2016 if (codec_dai->driver->playback.channels_min &&
2017 cpu_dai->driver->playback.channels_min)
2019 if (codec_dai->driver->capture.channels_min &&
2020 cpu_dai->driver->capture.channels_min)
2024 /* create the PCM */
2025 if (rtd->dai_link->no_pcm) {
2026 snprintf(new_name, sizeof(new_name), "(%s)",
2027 rtd->dai_link->stream_name);
2029 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2030 playback, capture, &pcm);
2032 if (rtd->dai_link->dynamic)
2033 snprintf(new_name, sizeof(new_name), "%s (*)",
2034 rtd->dai_link->stream_name);
2036 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2037 rtd->dai_link->stream_name, codec_dai->name, num);
2039 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2043 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2044 rtd->dai_link->name);
2047 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2049 /* DAPM dai link stream work */
2050 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2053 pcm->private_data = rtd;
2055 if (rtd->dai_link->no_pcm) {
2057 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2059 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2063 /* ASoC PCM operations */
2064 if (rtd->dai_link->dynamic) {
2065 rtd->ops.open = dpcm_fe_dai_open;
2066 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2067 rtd->ops.prepare = dpcm_fe_dai_prepare;
2068 rtd->ops.trigger = dpcm_fe_dai_trigger;
2069 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2070 rtd->ops.close = dpcm_fe_dai_close;
2071 rtd->ops.pointer = soc_pcm_pointer;
2072 rtd->ops.ioctl = soc_pcm_ioctl;
2074 rtd->ops.open = soc_pcm_open;
2075 rtd->ops.hw_params = soc_pcm_hw_params;
2076 rtd->ops.prepare = soc_pcm_prepare;
2077 rtd->ops.trigger = soc_pcm_trigger;
2078 rtd->ops.hw_free = soc_pcm_hw_free;
2079 rtd->ops.close = soc_pcm_close;
2080 rtd->ops.pointer = soc_pcm_pointer;
2081 rtd->ops.ioctl = soc_pcm_ioctl;
2084 if (platform->driver->ops) {
2085 rtd->ops.ack = platform->driver->ops->ack;
2086 rtd->ops.copy = platform->driver->ops->copy;
2087 rtd->ops.silence = platform->driver->ops->silence;
2088 rtd->ops.page = platform->driver->ops->page;
2089 rtd->ops.mmap = platform->driver->ops->mmap;
2093 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2096 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2098 if (platform->driver->pcm_new) {
2099 ret = platform->driver->pcm_new(rtd);
2101 dev_err(platform->dev,
2102 "ASoC: pcm constructor failed: %d\n",
2108 pcm->private_free = platform->driver->pcm_free;
2110 dev_info(rtd->card->dev, " %s <-> %s mapping ok\n", codec_dai->name,
2115 /* is the current PCM operation for this FE ? */
2116 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2118 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2122 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2124 /* is the current PCM operation for this BE ? */
2125 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2126 struct snd_soc_pcm_runtime *be, int stream)
2128 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2129 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2130 be->dpcm[stream].runtime_update))
2134 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2136 /* get the substream for this BE */
2137 struct snd_pcm_substream *
2138 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2140 return be->pcm->streams[stream].substream;
2142 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2144 /* get the BE runtime state */
2145 enum snd_soc_dpcm_state
2146 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2148 return be->dpcm[stream].state;
2150 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2152 /* set the BE runtime state */
2153 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2154 int stream, enum snd_soc_dpcm_state state)
2156 be->dpcm[stream].state = state;
2158 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2161 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2162 * are not running, paused or suspended for the specified stream direction.
2164 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2165 struct snd_soc_pcm_runtime *be, int stream)
2167 struct snd_soc_dpcm *dpcm;
2170 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2175 state = dpcm->fe->dpcm[stream].state;
2176 if (state == SND_SOC_DPCM_STATE_START ||
2177 state == SND_SOC_DPCM_STATE_PAUSED ||
2178 state == SND_SOC_DPCM_STATE_SUSPEND)
2182 /* it's safe to free/stop this BE DAI */
2185 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2188 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2189 * running, paused or suspended for the specified stream direction.
2191 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2192 struct snd_soc_pcm_runtime *be, int stream)
2194 struct snd_soc_dpcm *dpcm;
2197 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2202 state = dpcm->fe->dpcm[stream].state;
2203 if (state == SND_SOC_DPCM_STATE_START ||
2204 state == SND_SOC_DPCM_STATE_PAUSED ||
2205 state == SND_SOC_DPCM_STATE_SUSPEND ||
2206 state == SND_SOC_DPCM_STATE_PREPARE)
2210 /* it's safe to change hw_params */
2213 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2215 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2216 int cmd, struct snd_soc_platform *platform)
2218 if (platform->driver->ops->trigger)
2219 return platform->driver->ops->trigger(substream, cmd);
2222 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2224 #ifdef CONFIG_DEBUG_FS
2225 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2228 case SND_SOC_DPCM_STATE_NEW:
2230 case SND_SOC_DPCM_STATE_OPEN:
2232 case SND_SOC_DPCM_STATE_HW_PARAMS:
2234 case SND_SOC_DPCM_STATE_PREPARE:
2236 case SND_SOC_DPCM_STATE_START:
2238 case SND_SOC_DPCM_STATE_STOP:
2240 case SND_SOC_DPCM_STATE_SUSPEND:
2242 case SND_SOC_DPCM_STATE_PAUSED:
2244 case SND_SOC_DPCM_STATE_HW_FREE:
2246 case SND_SOC_DPCM_STATE_CLOSE:
2253 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2254 int stream, char *buf, size_t size)
2256 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2257 struct snd_soc_dpcm *dpcm;
2261 offset += snprintf(buf + offset, size - offset,
2262 "[%s - %s]\n", fe->dai_link->name,
2263 stream ? "Capture" : "Playback");
2265 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2266 dpcm_state_string(fe->dpcm[stream].state));
2268 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2269 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2270 offset += snprintf(buf + offset, size - offset,
2272 "Format = %s, Channels = %d, Rate = %d\n",
2273 snd_pcm_format_name(params_format(params)),
2274 params_channels(params),
2275 params_rate(params));
2278 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2280 if (list_empty(&fe->dpcm[stream].be_clients)) {
2281 offset += snprintf(buf + offset, size - offset,
2282 " No active DSP links\n");
2286 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2287 struct snd_soc_pcm_runtime *be = dpcm->be;
2288 params = &dpcm->hw_params;
2290 offset += snprintf(buf + offset, size - offset,
2291 "- %s\n", be->dai_link->name);
2293 offset += snprintf(buf + offset, size - offset,
2295 dpcm_state_string(be->dpcm[stream].state));
2297 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2298 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2299 offset += snprintf(buf + offset, size - offset,
2300 " Hardware Params: "
2301 "Format = %s, Channels = %d, Rate = %d\n",
2302 snd_pcm_format_name(params_format(params)),
2303 params_channels(params),
2304 params_rate(params));
2311 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2312 size_t count, loff_t *ppos)
2314 struct snd_soc_pcm_runtime *fe = file->private_data;
2315 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2318 buf = kmalloc(out_count, GFP_KERNEL);
2322 if (fe->cpu_dai->driver->playback.channels_min)
2323 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2324 buf + offset, out_count - offset);
2326 if (fe->cpu_dai->driver->capture.channels_min)
2327 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2328 buf + offset, out_count - offset);
2330 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2336 static const struct file_operations dpcm_state_fops = {
2337 .open = simple_open,
2338 .read = dpcm_state_read_file,
2339 .llseek = default_llseek,
2342 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2347 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2348 rtd->card->debugfs_card_root);
2349 if (!rtd->debugfs_dpcm_root) {
2351 "ASoC: Failed to create dpcm debugfs directory %s\n",
2352 rtd->dai_link->name);
2356 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2357 rtd->debugfs_dpcm_root,
2358 rtd, &dpcm_state_fops);