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/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>
35 #define DPCM_MAX_BE_USERS 8
38 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
39 * @substream: the pcm substream
40 * @hw: the hardware parameters
42 * Sets the substream runtime hardware parameters.
44 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
45 const struct snd_pcm_hardware *hw)
47 struct snd_pcm_runtime *runtime = substream->runtime;
48 runtime->hw.info = hw->info;
49 runtime->hw.formats = hw->formats;
50 runtime->hw.period_bytes_min = hw->period_bytes_min;
51 runtime->hw.period_bytes_max = hw->period_bytes_max;
52 runtime->hw.periods_min = hw->periods_min;
53 runtime->hw.periods_max = hw->periods_max;
54 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
55 runtime->hw.fifo_size = hw->fifo_size;
58 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
60 /* DPCM stream event, send event to FE and all active BEs. */
61 static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
64 struct snd_soc_dpcm *dpcm;
66 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
68 struct snd_soc_pcm_runtime *be = dpcm->be;
70 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
71 be->dai_link->name, event, dir);
73 snd_soc_dapm_stream_event(be, dir, event);
76 snd_soc_dapm_stream_event(fe, dir, event);
81 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
82 struct snd_soc_dai *soc_dai)
84 struct snd_soc_pcm_runtime *rtd = substream->private_data;
87 if (!soc_dai->driver->symmetric_rates &&
88 !rtd->dai_link->symmetric_rates)
91 /* This can happen if multiple streams are starting simultaneously -
92 * the second can need to get its constraints before the first has
93 * picked a rate. Complain and allow the application to carry on.
96 dev_warn(soc_dai->dev,
97 "ASoC: Not enforcing symmetric_rates due to race\n");
101 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", soc_dai->rate);
103 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
104 SNDRV_PCM_HW_PARAM_RATE,
105 soc_dai->rate, soc_dai->rate);
107 dev_err(soc_dai->dev,
108 "ASoC: Unable to apply rate symmetry constraint: %d\n",
117 * List of sample sizes that might go over the bus for parameter
118 * application. There ought to be a wildcard sample size for things
119 * like the DAC/ADC resolution to use but there isn't right now.
121 static int sample_sizes[] = {
125 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
126 struct snd_soc_dai *dai)
130 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
131 bits = dai->driver->playback.sig_bits;
133 bits = dai->driver->capture.sig_bits;
138 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
139 if (bits >= sample_sizes[i])
142 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
143 sample_sizes[i], bits);
146 "ASoC: Failed to set MSB %d/%d: %d\n",
147 bits, sample_sizes[i], ret);
151 static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
152 struct snd_soc_pcm_stream *codec_stream,
153 struct snd_soc_pcm_stream *cpu_stream)
155 struct snd_pcm_hardware *hw = &runtime->hw;
157 hw->channels_min = max(codec_stream->channels_min,
158 cpu_stream->channels_min);
159 hw->channels_max = min(codec_stream->channels_max,
160 cpu_stream->channels_max);
161 hw->formats = codec_stream->formats & cpu_stream->formats;
162 hw->rates = codec_stream->rates & cpu_stream->rates;
163 if (codec_stream->rates
164 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
165 hw->rates |= cpu_stream->rates;
166 if (cpu_stream->rates
167 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
168 hw->rates |= codec_stream->rates;
170 snd_pcm_limit_hw_rates(runtime);
172 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
173 hw->rate_min = max(hw->rate_min, codec_stream->rate_min);
174 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
175 hw->rate_max = min_not_zero(hw->rate_max, codec_stream->rate_max);
179 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
180 * then initialized and any private data can be allocated. This also calls
181 * startup for the cpu DAI, platform, machine and codec DAI.
183 static int soc_pcm_open(struct snd_pcm_substream *substream)
185 struct snd_soc_pcm_runtime *rtd = substream->private_data;
186 struct snd_pcm_runtime *runtime = substream->runtime;
187 struct snd_soc_platform *platform = rtd->platform;
188 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
189 struct snd_soc_dai *codec_dai = rtd->codec_dai;
190 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
191 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
194 pinctrl_pm_select_default_state(cpu_dai->dev);
195 pinctrl_pm_select_default_state(codec_dai->dev);
196 pm_runtime_get_sync(cpu_dai->dev);
197 pm_runtime_get_sync(codec_dai->dev);
198 pm_runtime_get_sync(platform->dev);
200 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
202 /* startup the audio subsystem */
203 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
204 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
206 dev_err(cpu_dai->dev, "ASoC: can't open interface"
207 " %s: %d\n", cpu_dai->name, ret);
212 if (platform->driver->ops && platform->driver->ops->open) {
213 ret = platform->driver->ops->open(substream);
215 dev_err(platform->dev, "ASoC: can't open platform"
216 " %s: %d\n", platform->name, ret);
221 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
222 ret = codec_dai->driver->ops->startup(substream, codec_dai);
224 dev_err(codec_dai->dev, "ASoC: can't open codec"
225 " %s: %d\n", codec_dai->name, ret);
230 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
231 ret = rtd->dai_link->ops->startup(substream);
233 pr_err("ASoC: %s startup failed: %d\n",
234 rtd->dai_link->name, ret);
239 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
240 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
243 /* Check that the codec and cpu DAIs are compatible */
244 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
245 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->playback,
246 &cpu_dai_drv->playback);
248 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->capture,
249 &cpu_dai_drv->capture);
253 if (!runtime->hw.rates) {
254 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
255 codec_dai->name, cpu_dai->name);
258 if (!runtime->hw.formats) {
259 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
260 codec_dai->name, cpu_dai->name);
263 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
264 runtime->hw.channels_min > runtime->hw.channels_max) {
265 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
266 codec_dai->name, cpu_dai->name);
270 soc_pcm_apply_msb(substream, codec_dai);
271 soc_pcm_apply_msb(substream, cpu_dai);
273 /* Symmetry only applies if we've already got an active stream. */
274 if (cpu_dai->active) {
275 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
280 if (codec_dai->active) {
281 ret = soc_pcm_apply_symmetry(substream, codec_dai);
286 pr_debug("ASoC: %s <-> %s info:\n",
287 codec_dai->name, cpu_dai->name);
288 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
289 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
290 runtime->hw.channels_max);
291 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
292 runtime->hw.rate_max);
295 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
296 cpu_dai->playback_active++;
297 codec_dai->playback_active++;
299 cpu_dai->capture_active++;
300 codec_dai->capture_active++;
304 rtd->codec->active++;
305 mutex_unlock(&rtd->pcm_mutex);
309 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
310 rtd->dai_link->ops->shutdown(substream);
313 if (codec_dai->driver->ops->shutdown)
314 codec_dai->driver->ops->shutdown(substream, codec_dai);
317 if (platform->driver->ops && platform->driver->ops->close)
318 platform->driver->ops->close(substream);
321 if (cpu_dai->driver->ops->shutdown)
322 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
324 mutex_unlock(&rtd->pcm_mutex);
326 pm_runtime_put(platform->dev);
327 pm_runtime_put(codec_dai->dev);
328 pm_runtime_put(cpu_dai->dev);
329 if (!codec_dai->active)
330 pinctrl_pm_select_sleep_state(codec_dai->dev);
331 if (!cpu_dai->active)
332 pinctrl_pm_select_sleep_state(cpu_dai->dev);
338 * Power down the audio subsystem pmdown_time msecs after close is called.
339 * This is to ensure there are no pops or clicks in between any music tracks
340 * due to DAPM power cycling.
342 static void close_delayed_work(struct work_struct *work)
344 struct snd_soc_pcm_runtime *rtd =
345 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
346 struct snd_soc_dai *codec_dai = rtd->codec_dai;
348 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
350 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
351 codec_dai->driver->playback.stream_name,
352 codec_dai->playback_active ? "active" : "inactive",
353 rtd->pop_wait ? "yes" : "no");
355 /* are we waiting on this codec DAI stream */
356 if (rtd->pop_wait == 1) {
358 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
359 SND_SOC_DAPM_STREAM_STOP);
362 mutex_unlock(&rtd->pcm_mutex);
366 * Called by ALSA when a PCM substream is closed. Private data can be
367 * freed here. The cpu DAI, codec DAI, machine and platform are also
370 static int soc_pcm_close(struct snd_pcm_substream *substream)
372 struct snd_soc_pcm_runtime *rtd = substream->private_data;
373 struct snd_soc_platform *platform = rtd->platform;
374 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
375 struct snd_soc_dai *codec_dai = rtd->codec_dai;
376 struct snd_soc_codec *codec = rtd->codec;
378 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
380 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
381 cpu_dai->playback_active--;
382 codec_dai->playback_active--;
384 cpu_dai->capture_active--;
385 codec_dai->capture_active--;
392 /* clear the corresponding DAIs rate when inactive */
393 if (!cpu_dai->active)
396 if (!codec_dai->active)
399 /* Muting the DAC suppresses artifacts caused during digital
400 * shutdown, for example from stopping clocks.
402 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
404 if (cpu_dai->driver->ops->shutdown)
405 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
407 if (codec_dai->driver->ops->shutdown)
408 codec_dai->driver->ops->shutdown(substream, codec_dai);
410 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
411 rtd->dai_link->ops->shutdown(substream);
413 if (platform->driver->ops && platform->driver->ops->close)
414 platform->driver->ops->close(substream);
415 cpu_dai->runtime = NULL;
417 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
418 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
419 rtd->dai_link->ignore_pmdown_time) {
420 /* powered down playback stream now */
421 snd_soc_dapm_stream_event(rtd,
422 SNDRV_PCM_STREAM_PLAYBACK,
423 SND_SOC_DAPM_STREAM_STOP);
425 /* start delayed pop wq here for playback streams */
427 queue_delayed_work(system_power_efficient_wq,
429 msecs_to_jiffies(rtd->pmdown_time));
432 /* capture streams can be powered down now */
433 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
434 SND_SOC_DAPM_STREAM_STOP);
437 mutex_unlock(&rtd->pcm_mutex);
439 pm_runtime_put(platform->dev);
440 pm_runtime_put(codec_dai->dev);
441 pm_runtime_put(cpu_dai->dev);
442 if (!codec_dai->active)
443 pinctrl_pm_select_sleep_state(codec_dai->dev);
444 if (!cpu_dai->active)
445 pinctrl_pm_select_sleep_state(cpu_dai->dev);
451 * Called by ALSA when the PCM substream is prepared, can set format, sample
452 * rate, etc. This function is non atomic and can be called multiple times,
453 * it can refer to the runtime info.
455 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
457 struct snd_soc_pcm_runtime *rtd = substream->private_data;
458 struct snd_soc_platform *platform = rtd->platform;
459 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
460 struct snd_soc_dai *codec_dai = rtd->codec_dai;
463 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
465 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
466 ret = rtd->dai_link->ops->prepare(substream);
468 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
474 if (platform->driver->ops && platform->driver->ops->prepare) {
475 ret = platform->driver->ops->prepare(substream);
477 dev_err(platform->dev, "ASoC: platform prepare error:"
483 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
484 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
486 dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
492 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
493 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
495 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
501 /* cancel any delayed stream shutdown that is pending */
502 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
505 cancel_delayed_work(&rtd->delayed_work);
508 snd_soc_dapm_stream_event(rtd, substream->stream,
509 SND_SOC_DAPM_STREAM_START);
511 snd_soc_dai_digital_mute(codec_dai, 0, substream->stream);
514 mutex_unlock(&rtd->pcm_mutex);
519 * Called by ALSA when the hardware params are set by application. This
520 * function can also be called multiple times and can allocate buffers
521 * (using snd_pcm_lib_* ). It's non-atomic.
523 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
524 struct snd_pcm_hw_params *params)
526 struct snd_soc_pcm_runtime *rtd = substream->private_data;
527 struct snd_soc_platform *platform = rtd->platform;
528 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
529 struct snd_soc_dai *codec_dai = rtd->codec_dai;
532 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
534 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
535 ret = rtd->dai_link->ops->hw_params(substream, params);
537 dev_err(rtd->card->dev, "ASoC: machine hw_params"
538 " failed: %d\n", ret);
543 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) {
544 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
546 dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
547 " %d\n", codec_dai->name, ret);
552 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) {
553 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
555 dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
561 if (platform->driver->ops && platform->driver->ops->hw_params) {
562 ret = platform->driver->ops->hw_params(substream, params);
564 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
565 platform->name, ret);
570 /* store the rate for each DAIs */
571 cpu_dai->rate = params_rate(params);
572 codec_dai->rate = params_rate(params);
575 mutex_unlock(&rtd->pcm_mutex);
579 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
580 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
583 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
584 codec_dai->driver->ops->hw_free(substream, codec_dai);
587 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
588 rtd->dai_link->ops->hw_free(substream);
590 mutex_unlock(&rtd->pcm_mutex);
595 * Frees resources allocated by hw_params, can be called multiple times
597 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
599 struct snd_soc_pcm_runtime *rtd = substream->private_data;
600 struct snd_soc_platform *platform = rtd->platform;
601 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
602 struct snd_soc_dai *codec_dai = rtd->codec_dai;
603 struct snd_soc_codec *codec = rtd->codec;
605 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
607 /* apply codec digital mute */
609 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
611 /* free any machine hw params */
612 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
613 rtd->dai_link->ops->hw_free(substream);
615 /* free any DMA resources */
616 if (platform->driver->ops && platform->driver->ops->hw_free)
617 platform->driver->ops->hw_free(substream);
619 /* now free hw params for the DAIs */
620 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
621 codec_dai->driver->ops->hw_free(substream, codec_dai);
623 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
624 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
626 mutex_unlock(&rtd->pcm_mutex);
630 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
632 struct snd_soc_pcm_runtime *rtd = substream->private_data;
633 struct snd_soc_platform *platform = rtd->platform;
634 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
635 struct snd_soc_dai *codec_dai = rtd->codec_dai;
638 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
639 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
644 if (platform->driver->ops && platform->driver->ops->trigger) {
645 ret = platform->driver->ops->trigger(substream, cmd);
650 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
651 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
658 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
661 struct snd_soc_pcm_runtime *rtd = substream->private_data;
662 struct snd_soc_platform *platform = rtd->platform;
663 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
664 struct snd_soc_dai *codec_dai = rtd->codec_dai;
667 if (codec_dai->driver->ops &&
668 codec_dai->driver->ops->bespoke_trigger) {
669 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
674 if (platform->driver->ops && platform->driver->bespoke_trigger) {
675 ret = platform->driver->bespoke_trigger(substream, cmd);
680 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
681 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
688 * soc level wrapper for pointer callback
689 * If cpu_dai, codec_dai, platform driver has the delay callback, than
690 * the runtime->delay will be updated accordingly.
692 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
694 struct snd_soc_pcm_runtime *rtd = substream->private_data;
695 struct snd_soc_platform *platform = rtd->platform;
696 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
697 struct snd_soc_dai *codec_dai = rtd->codec_dai;
698 struct snd_pcm_runtime *runtime = substream->runtime;
699 snd_pcm_uframes_t offset = 0;
700 snd_pcm_sframes_t delay = 0;
702 if (platform->driver->ops && platform->driver->ops->pointer)
703 offset = platform->driver->ops->pointer(substream);
705 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
706 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
708 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
709 delay += codec_dai->driver->ops->delay(substream, codec_dai);
711 if (platform->driver->delay)
712 delay += platform->driver->delay(substream, codec_dai);
714 runtime->delay = delay;
719 /* connect a FE and BE */
720 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
721 struct snd_soc_pcm_runtime *be, int stream)
723 struct snd_soc_dpcm *dpcm;
725 /* only add new dpcms */
726 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
727 if (dpcm->be == be && dpcm->fe == fe)
731 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
737 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
738 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
739 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
740 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
742 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
743 stream ? "capture" : "playback", fe->dai_link->name,
744 stream ? "<-" : "->", be->dai_link->name);
746 #ifdef CONFIG_DEBUG_FS
747 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
748 fe->debugfs_dpcm_root, &dpcm->state);
753 /* reparent a BE onto another FE */
754 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
755 struct snd_soc_pcm_runtime *be, int stream)
757 struct snd_soc_dpcm *dpcm;
758 struct snd_pcm_substream *fe_substream, *be_substream;
760 /* reparent if BE is connected to other FEs */
761 if (!be->dpcm[stream].users)
764 be_substream = snd_soc_dpcm_get_substream(be, stream);
766 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
770 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
771 stream ? "capture" : "playback",
772 dpcm->fe->dai_link->name,
773 stream ? "<-" : "->", dpcm->be->dai_link->name);
775 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
776 be_substream->runtime = fe_substream->runtime;
781 /* disconnect a BE and FE */
782 static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
784 struct snd_soc_dpcm *dpcm, *d;
786 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
787 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
788 stream ? "capture" : "playback",
789 dpcm->be->dai_link->name);
791 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
794 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
795 stream ? "capture" : "playback", fe->dai_link->name,
796 stream ? "<-" : "->", dpcm->be->dai_link->name);
798 /* BEs still alive need new FE */
799 dpcm_be_reparent(fe, dpcm->be, stream);
801 #ifdef CONFIG_DEBUG_FS
802 debugfs_remove(dpcm->debugfs_state);
804 list_del(&dpcm->list_be);
805 list_del(&dpcm->list_fe);
810 /* get BE for DAI widget and stream */
811 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
812 struct snd_soc_dapm_widget *widget, int stream)
814 struct snd_soc_pcm_runtime *be;
817 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
818 for (i = 0; i < card->num_links; i++) {
821 if (!be->dai_link->no_pcm)
824 if (be->cpu_dai->playback_widget == widget ||
825 be->codec_dai->playback_widget == widget)
830 for (i = 0; i < card->num_links; i++) {
833 if (!be->dai_link->no_pcm)
836 if (be->cpu_dai->capture_widget == widget ||
837 be->codec_dai->capture_widget == widget)
842 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
843 stream ? "capture" : "playback", widget->name);
847 static inline struct snd_soc_dapm_widget *
848 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
850 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
851 return rtd->cpu_dai->playback_widget;
853 return rtd->cpu_dai->capture_widget;
856 static inline struct snd_soc_dapm_widget *
857 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
859 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
860 return rtd->codec_dai->playback_widget;
862 return rtd->codec_dai->capture_widget;
865 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
866 struct snd_soc_dapm_widget *widget)
870 for (i = 0; i < list->num_widgets; i++) {
871 if (widget == list->widgets[i])
878 static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
879 int stream, struct snd_soc_dapm_widget_list **list_)
881 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
882 struct snd_soc_dapm_widget_list *list;
885 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
886 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
890 /* get number of valid DAI paths and their widgets */
891 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
893 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
894 stream ? "capture" : "playback");
900 static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
905 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
906 struct snd_soc_dapm_widget_list **list_)
908 struct snd_soc_dpcm *dpcm;
909 struct snd_soc_dapm_widget_list *list = *list_;
910 struct snd_soc_dapm_widget *widget;
913 /* Destroy any old FE <--> BE connections */
914 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
916 /* is there a valid CPU DAI widget for this BE */
917 widget = rtd_get_cpu_widget(dpcm->be, stream);
919 /* prune the BE if it's no longer in our active list */
920 if (widget && widget_in_list(list, widget))
923 /* is there a valid CODEC DAI widget for this BE */
924 widget = rtd_get_codec_widget(dpcm->be, stream);
926 /* prune the BE if it's no longer in our active list */
927 if (widget && widget_in_list(list, widget))
930 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
931 stream ? "capture" : "playback",
932 dpcm->be->dai_link->name, fe->dai_link->name);
933 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
934 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
938 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
942 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
943 struct snd_soc_dapm_widget_list **list_)
945 struct snd_soc_card *card = fe->card;
946 struct snd_soc_dapm_widget_list *list = *list_;
947 struct snd_soc_pcm_runtime *be;
950 /* Create any new FE <--> BE connections */
951 for (i = 0; i < list->num_widgets; i++) {
953 switch (list->widgets[i]->id) {
954 case snd_soc_dapm_dai_in:
955 case snd_soc_dapm_dai_out:
961 /* is there a valid BE rtd for this widget */
962 be = dpcm_get_be(card, list->widgets[i], stream);
964 dev_err(fe->dev, "ASoC: no BE found for %s\n",
965 list->widgets[i]->name);
969 /* make sure BE is a real BE */
970 if (!be->dai_link->no_pcm)
973 /* don't connect if FE is not running */
974 if (!fe->dpcm[stream].runtime)
977 /* newly connected FE and BE */
978 err = dpcm_be_connect(fe, be, stream);
980 dev_err(fe->dev, "ASoC: can't connect %s\n",
981 list->widgets[i]->name);
983 } else if (err == 0) /* already connected */
987 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
991 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
996 * Find the corresponding BE DAIs that source or sink audio to this
999 static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1000 int stream, struct snd_soc_dapm_widget_list **list, int new)
1003 return dpcm_add_paths(fe, stream, list);
1005 return dpcm_prune_paths(fe, stream, list);
1008 static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1010 struct snd_soc_dpcm *dpcm;
1012 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1013 dpcm->be->dpcm[stream].runtime_update =
1014 SND_SOC_DPCM_UPDATE_NO;
1017 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1020 struct snd_soc_dpcm *dpcm;
1022 /* disable any enabled and non active backends */
1023 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1025 struct snd_soc_pcm_runtime *be = dpcm->be;
1026 struct snd_pcm_substream *be_substream =
1027 snd_soc_dpcm_get_substream(be, stream);
1029 if (be->dpcm[stream].users == 0)
1030 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1031 stream ? "capture" : "playback",
1032 be->dpcm[stream].state);
1034 if (--be->dpcm[stream].users != 0)
1037 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1040 soc_pcm_close(be_substream);
1041 be_substream->runtime = NULL;
1042 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1046 static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1048 struct snd_soc_dpcm *dpcm;
1051 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1052 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1054 struct snd_soc_pcm_runtime *be = dpcm->be;
1055 struct snd_pcm_substream *be_substream =
1056 snd_soc_dpcm_get_substream(be, stream);
1058 if (!be_substream) {
1059 dev_err(be->dev, "ASoC: no backend %s stream\n",
1060 stream ? "capture" : "playback");
1064 /* is this op for this BE ? */
1065 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1068 /* first time the dpcm is open ? */
1069 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1070 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1071 stream ? "capture" : "playback",
1072 be->dpcm[stream].state);
1074 if (be->dpcm[stream].users++ != 0)
1077 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1078 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1081 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1082 stream ? "capture" : "playback", be->dai_link->name);
1084 be_substream->runtime = be->dpcm[stream].runtime;
1085 err = soc_pcm_open(be_substream);
1087 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1088 be->dpcm[stream].users--;
1089 if (be->dpcm[stream].users < 0)
1090 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1091 stream ? "capture" : "playback",
1092 be->dpcm[stream].state);
1094 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1098 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1105 /* disable any enabled and non active backends */
1106 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1107 struct snd_soc_pcm_runtime *be = dpcm->be;
1108 struct snd_pcm_substream *be_substream =
1109 snd_soc_dpcm_get_substream(be, stream);
1111 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1114 if (be->dpcm[stream].users == 0)
1115 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1116 stream ? "capture" : "playback",
1117 be->dpcm[stream].state);
1119 if (--be->dpcm[stream].users != 0)
1122 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1125 soc_pcm_close(be_substream);
1126 be_substream->runtime = NULL;
1127 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1133 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1135 struct snd_pcm_runtime *runtime = substream->runtime;
1136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1137 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1138 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1140 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1141 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
1142 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
1143 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
1144 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
1145 runtime->hw.formats &= cpu_dai_drv->playback.formats;
1146 runtime->hw.rates = cpu_dai_drv->playback.rates;
1148 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
1149 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
1150 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
1151 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
1152 runtime->hw.formats &= cpu_dai_drv->capture.formats;
1153 runtime->hw.rates = cpu_dai_drv->capture.rates;
1157 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1159 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1160 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1161 int stream = fe_substream->stream, ret = 0;
1163 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1165 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1167 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1171 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1173 /* start the DAI frontend */
1174 ret = soc_pcm_open(fe_substream);
1176 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1180 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1182 dpcm_set_fe_runtime(fe_substream);
1183 snd_pcm_limit_hw_rates(runtime);
1185 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1189 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1191 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1195 static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1197 struct snd_soc_dpcm *dpcm;
1199 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1200 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1202 struct snd_soc_pcm_runtime *be = dpcm->be;
1203 struct snd_pcm_substream *be_substream =
1204 snd_soc_dpcm_get_substream(be, stream);
1206 /* is this op for this BE ? */
1207 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1210 if (be->dpcm[stream].users == 0)
1211 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1212 stream ? "capture" : "playback",
1213 be->dpcm[stream].state);
1215 if (--be->dpcm[stream].users != 0)
1218 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1219 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1222 dev_dbg(be->dev, "ASoC: close BE %s\n",
1223 dpcm->fe->dai_link->name);
1225 soc_pcm_close(be_substream);
1226 be_substream->runtime = NULL;
1228 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1233 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1235 struct snd_soc_pcm_runtime *fe = substream->private_data;
1236 int stream = substream->stream;
1238 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1240 /* shutdown the BEs */
1241 dpcm_be_dai_shutdown(fe, substream->stream);
1243 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1245 /* now shutdown the frontend */
1246 soc_pcm_close(substream);
1248 /* run the stream event for each BE */
1249 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1251 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1252 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1256 static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1258 struct snd_soc_dpcm *dpcm;
1260 /* only hw_params backends that are either sinks or sources
1261 * to this frontend DAI */
1262 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1264 struct snd_soc_pcm_runtime *be = dpcm->be;
1265 struct snd_pcm_substream *be_substream =
1266 snd_soc_dpcm_get_substream(be, stream);
1268 /* is this op for this BE ? */
1269 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1272 /* only free hw when no longer used - check all FEs */
1273 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1276 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1277 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1278 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1279 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1280 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1283 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1284 dpcm->fe->dai_link->name);
1286 soc_pcm_hw_free(be_substream);
1288 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1294 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1296 struct snd_soc_pcm_runtime *fe = substream->private_data;
1297 int err, stream = substream->stream;
1299 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1300 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1302 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1304 /* call hw_free on the frontend */
1305 err = soc_pcm_hw_free(substream);
1307 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1308 fe->dai_link->name);
1310 /* only hw_params backends that are either sinks or sources
1311 * to this frontend DAI */
1312 err = dpcm_be_dai_hw_free(fe, stream);
1314 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1315 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1317 mutex_unlock(&fe->card->mutex);
1321 static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1323 struct snd_soc_dpcm *dpcm;
1326 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1328 struct snd_soc_pcm_runtime *be = dpcm->be;
1329 struct snd_pcm_substream *be_substream =
1330 snd_soc_dpcm_get_substream(be, stream);
1332 /* is this op for this BE ? */
1333 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1336 /* only allow hw_params() if no connected FEs are running */
1337 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1340 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1341 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1342 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1345 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1346 dpcm->fe->dai_link->name);
1348 /* copy params for each dpcm */
1349 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1350 sizeof(struct snd_pcm_hw_params));
1352 /* perform any hw_params fixups */
1353 if (be->dai_link->be_hw_params_fixup) {
1354 ret = be->dai_link->be_hw_params_fixup(be,
1358 "ASoC: hw_params BE fixup failed %d\n",
1364 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1366 dev_err(dpcm->be->dev,
1367 "ASoC: hw_params BE failed %d\n", ret);
1371 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1376 /* disable any enabled and non active backends */
1377 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1378 struct snd_soc_pcm_runtime *be = dpcm->be;
1379 struct snd_pcm_substream *be_substream =
1380 snd_soc_dpcm_get_substream(be, stream);
1382 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1385 /* only allow hw_free() if no connected FEs are running */
1386 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1389 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1390 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1391 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1392 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1395 soc_pcm_hw_free(be_substream);
1401 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1402 struct snd_pcm_hw_params *params)
1404 struct snd_soc_pcm_runtime *fe = substream->private_data;
1405 int ret, stream = substream->stream;
1407 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1408 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1410 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1411 sizeof(struct snd_pcm_hw_params));
1412 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1414 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1418 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1419 fe->dai_link->name, params_rate(params),
1420 params_channels(params), params_format(params));
1422 /* call hw_params on the frontend */
1423 ret = soc_pcm_hw_params(substream, params);
1425 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1426 dpcm_be_dai_hw_free(fe, stream);
1428 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1431 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1432 mutex_unlock(&fe->card->mutex);
1436 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1437 struct snd_pcm_substream *substream, int cmd)
1441 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1442 dpcm->fe->dai_link->name, cmd);
1444 ret = soc_pcm_trigger(substream, cmd);
1446 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1451 static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1454 struct snd_soc_dpcm *dpcm;
1457 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1459 struct snd_soc_pcm_runtime *be = dpcm->be;
1460 struct snd_pcm_substream *be_substream =
1461 snd_soc_dpcm_get_substream(be, stream);
1463 /* is this op for this BE ? */
1464 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1468 case SNDRV_PCM_TRIGGER_START:
1469 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1470 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1473 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1477 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1479 case SNDRV_PCM_TRIGGER_RESUME:
1480 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1483 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1487 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1489 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1490 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1493 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1497 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1499 case SNDRV_PCM_TRIGGER_STOP:
1500 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1503 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1506 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1510 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1512 case SNDRV_PCM_TRIGGER_SUSPEND:
1513 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1516 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1519 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1523 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1525 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1526 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1529 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1532 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1536 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1543 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1545 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1547 struct snd_soc_pcm_runtime *fe = substream->private_data;
1548 int stream = substream->stream, ret;
1549 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1551 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1554 case SND_SOC_DPCM_TRIGGER_PRE:
1555 /* call trigger on the frontend before the backend. */
1557 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1558 fe->dai_link->name, cmd);
1560 ret = soc_pcm_trigger(substream, cmd);
1562 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1566 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1568 case SND_SOC_DPCM_TRIGGER_POST:
1569 /* call trigger on the frontend after the backend. */
1571 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1573 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1577 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1578 fe->dai_link->name, cmd);
1580 ret = soc_pcm_trigger(substream, cmd);
1582 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1583 /* bespoke trigger() - handles both FE and BEs */
1585 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1586 fe->dai_link->name, cmd);
1588 ret = soc_pcm_bespoke_trigger(substream, cmd);
1590 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1595 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1596 fe->dai_link->name);
1602 case SNDRV_PCM_TRIGGER_START:
1603 case SNDRV_PCM_TRIGGER_RESUME:
1604 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1605 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1607 case SNDRV_PCM_TRIGGER_STOP:
1608 case SNDRV_PCM_TRIGGER_SUSPEND:
1609 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1610 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1615 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1619 static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1621 struct snd_soc_dpcm *dpcm;
1624 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1626 struct snd_soc_pcm_runtime *be = dpcm->be;
1627 struct snd_pcm_substream *be_substream =
1628 snd_soc_dpcm_get_substream(be, stream);
1630 /* is this op for this BE ? */
1631 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1634 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1635 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1638 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
1639 dpcm->fe->dai_link->name);
1641 ret = soc_pcm_prepare(be_substream);
1643 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
1648 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1653 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1655 struct snd_soc_pcm_runtime *fe = substream->private_data;
1656 int stream = substream->stream, ret = 0;
1658 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1660 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
1662 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1664 /* there is no point preparing this FE if there are no BEs */
1665 if (list_empty(&fe->dpcm[stream].be_clients)) {
1666 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
1667 fe->dai_link->name);
1672 ret = dpcm_be_dai_prepare(fe, substream->stream);
1676 /* call prepare on the frontend */
1677 ret = soc_pcm_prepare(substream);
1679 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
1680 fe->dai_link->name);
1684 /* run the stream event for each BE */
1685 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1686 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1689 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1690 mutex_unlock(&fe->card->mutex);
1695 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1696 unsigned int cmd, void *arg)
1698 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1699 struct snd_soc_platform *platform = rtd->platform;
1701 if (platform->driver->ops && platform->driver->ops->ioctl)
1702 return platform->driver->ops->ioctl(substream, cmd, arg);
1703 return snd_pcm_lib_ioctl(substream, cmd, arg);
1706 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1708 struct snd_pcm_substream *substream =
1709 snd_soc_dpcm_get_substream(fe, stream);
1710 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1713 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
1714 stream ? "capture" : "playback", fe->dai_link->name);
1716 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1717 /* call bespoke trigger - FE takes care of all BE triggers */
1718 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
1719 fe->dai_link->name);
1721 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1723 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1725 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
1726 fe->dai_link->name);
1728 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1730 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1733 err = dpcm_be_dai_hw_free(fe, stream);
1735 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
1737 err = dpcm_be_dai_shutdown(fe, stream);
1739 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
1741 /* run the stream event for each BE */
1742 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1747 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1749 struct snd_pcm_substream *substream =
1750 snd_soc_dpcm_get_substream(fe, stream);
1751 struct snd_soc_dpcm *dpcm;
1752 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1755 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
1756 stream ? "capture" : "playback", fe->dai_link->name);
1758 /* Only start the BE if the FE is ready */
1759 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1760 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1763 /* startup must always be called for new BEs */
1764 ret = dpcm_be_dai_startup(fe, stream);
1768 /* keep going if FE state is > open */
1769 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1772 ret = dpcm_be_dai_hw_params(fe, stream);
1776 /* keep going if FE state is > hw_params */
1777 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1781 ret = dpcm_be_dai_prepare(fe, stream);
1785 /* run the stream event for each BE */
1786 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1788 /* keep going if FE state is > prepare */
1789 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1790 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1793 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1794 /* call trigger on the frontend - FE takes care of all BE triggers */
1795 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
1796 fe->dai_link->name);
1798 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1800 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
1804 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
1805 fe->dai_link->name);
1807 ret = dpcm_be_dai_trigger(fe, stream,
1808 SNDRV_PCM_TRIGGER_START);
1810 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1818 dpcm_be_dai_hw_free(fe, stream);
1820 dpcm_be_dai_shutdown(fe, stream);
1822 /* disconnect any non started BEs */
1823 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1824 struct snd_soc_pcm_runtime *be = dpcm->be;
1825 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1826 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1832 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1836 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1837 ret = dpcm_run_update_startup(fe, stream);
1839 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
1840 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1845 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
1849 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1850 ret = dpcm_run_update_shutdown(fe, stream);
1852 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
1853 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1858 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
1861 int soc_dpcm_runtime_update(struct snd_soc_card *card)
1863 int i, old, new, paths;
1865 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1866 for (i = 0; i < card->num_rtd; i++) {
1867 struct snd_soc_dapm_widget_list *list;
1868 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
1870 /* make sure link is FE */
1871 if (!fe->dai_link->dynamic)
1874 /* only check active links */
1875 if (!fe->cpu_dai->active)
1878 /* DAPM sync will call this to update DSP paths */
1879 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
1880 fe->dai_link->name);
1882 /* skip if FE doesn't have playback capability */
1883 if (!fe->cpu_dai->driver->playback.channels_min)
1886 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
1888 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1889 fe->dai_link->name, "playback");
1890 mutex_unlock(&card->mutex);
1894 /* update any new playback paths */
1895 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
1897 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1898 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1899 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1902 /* update any old playback paths */
1903 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
1905 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1906 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1907 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1911 /* skip if FE doesn't have capture capability */
1912 if (!fe->cpu_dai->driver->capture.channels_min)
1915 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
1917 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1918 fe->dai_link->name, "capture");
1919 mutex_unlock(&card->mutex);
1923 /* update any new capture paths */
1924 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
1926 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1927 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1928 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1931 /* update any old capture paths */
1932 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
1934 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1935 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1936 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1939 dpcm_path_put(&list);
1942 mutex_unlock(&card->mutex);
1945 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
1947 struct snd_soc_dpcm *dpcm;
1948 struct list_head *clients =
1949 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
1951 list_for_each_entry(dpcm, clients, list_be) {
1953 struct snd_soc_pcm_runtime *be = dpcm->be;
1954 struct snd_soc_dai *dai = be->codec_dai;
1955 struct snd_soc_dai_driver *drv = dai->driver;
1957 if (be->dai_link->ignore_suspend)
1960 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
1962 if (drv->ops && drv->ops->digital_mute && dai->playback_active)
1963 drv->ops->digital_mute(dai, mute);
1969 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
1971 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1972 struct snd_soc_dpcm *dpcm;
1973 struct snd_soc_dapm_widget_list *list;
1975 int stream = fe_substream->stream;
1977 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1978 fe->dpcm[stream].runtime = fe_substream->runtime;
1980 if (dpcm_path_get(fe, stream, &list) <= 0) {
1981 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
1982 fe->dai_link->name, stream ? "capture" : "playback");
1985 /* calculate valid and active FE <-> BE dpcms */
1986 dpcm_process_paths(fe, stream, &list, 1);
1988 ret = dpcm_fe_dai_startup(fe_substream);
1990 /* clean up all links */
1991 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1992 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1994 dpcm_be_disconnect(fe, stream);
1995 fe->dpcm[stream].runtime = NULL;
1998 dpcm_clear_pending_state(fe, stream);
1999 dpcm_path_put(&list);
2000 mutex_unlock(&fe->card->mutex);
2004 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2006 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2007 struct snd_soc_dpcm *dpcm;
2008 int stream = fe_substream->stream, ret;
2010 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2011 ret = dpcm_fe_dai_shutdown(fe_substream);
2013 /* mark FE's links ready to prune */
2014 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2015 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2017 dpcm_be_disconnect(fe, stream);
2019 fe->dpcm[stream].runtime = NULL;
2020 mutex_unlock(&fe->card->mutex);
2024 /* create a new pcm */
2025 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2027 struct snd_soc_platform *platform = rtd->platform;
2028 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2029 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2030 struct snd_pcm *pcm;
2032 int ret = 0, playback = 0, capture = 0;
2034 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2035 if (cpu_dai->driver->playback.channels_min)
2037 if (cpu_dai->driver->capture.channels_min)
2040 if (codec_dai->driver->playback.channels_min &&
2041 cpu_dai->driver->playback.channels_min)
2043 if (codec_dai->driver->capture.channels_min &&
2044 cpu_dai->driver->capture.channels_min)
2048 if (rtd->dai_link->playback_only) {
2053 if (rtd->dai_link->capture_only) {
2058 /* create the PCM */
2059 if (rtd->dai_link->no_pcm) {
2060 snprintf(new_name, sizeof(new_name), "(%s)",
2061 rtd->dai_link->stream_name);
2063 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2064 playback, capture, &pcm);
2066 if (rtd->dai_link->dynamic)
2067 snprintf(new_name, sizeof(new_name), "%s (*)",
2068 rtd->dai_link->stream_name);
2070 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2071 rtd->dai_link->stream_name, codec_dai->name, num);
2073 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2077 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2078 rtd->dai_link->name);
2081 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2083 /* DAPM dai link stream work */
2084 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2087 pcm->private_data = rtd;
2089 if (rtd->dai_link->no_pcm) {
2091 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2093 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2097 /* ASoC PCM operations */
2098 if (rtd->dai_link->dynamic) {
2099 rtd->ops.open = dpcm_fe_dai_open;
2100 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2101 rtd->ops.prepare = dpcm_fe_dai_prepare;
2102 rtd->ops.trigger = dpcm_fe_dai_trigger;
2103 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2104 rtd->ops.close = dpcm_fe_dai_close;
2105 rtd->ops.pointer = soc_pcm_pointer;
2106 rtd->ops.ioctl = soc_pcm_ioctl;
2108 rtd->ops.open = soc_pcm_open;
2109 rtd->ops.hw_params = soc_pcm_hw_params;
2110 rtd->ops.prepare = soc_pcm_prepare;
2111 rtd->ops.trigger = soc_pcm_trigger;
2112 rtd->ops.hw_free = soc_pcm_hw_free;
2113 rtd->ops.close = soc_pcm_close;
2114 rtd->ops.pointer = soc_pcm_pointer;
2115 rtd->ops.ioctl = soc_pcm_ioctl;
2118 if (platform->driver->ops) {
2119 rtd->ops.ack = platform->driver->ops->ack;
2120 rtd->ops.copy = platform->driver->ops->copy;
2121 rtd->ops.silence = platform->driver->ops->silence;
2122 rtd->ops.page = platform->driver->ops->page;
2123 rtd->ops.mmap = platform->driver->ops->mmap;
2127 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2130 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2132 if (platform->driver->pcm_new) {
2133 ret = platform->driver->pcm_new(rtd);
2135 dev_err(platform->dev,
2136 "ASoC: pcm constructor failed: %d\n",
2142 pcm->private_free = platform->driver->pcm_free;
2144 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", codec_dai->name,
2149 /* is the current PCM operation for this FE ? */
2150 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2152 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2156 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2158 /* is the current PCM operation for this BE ? */
2159 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2160 struct snd_soc_pcm_runtime *be, int stream)
2162 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2163 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2164 be->dpcm[stream].runtime_update))
2168 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2170 /* get the substream for this BE */
2171 struct snd_pcm_substream *
2172 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2174 return be->pcm->streams[stream].substream;
2176 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2178 /* get the BE runtime state */
2179 enum snd_soc_dpcm_state
2180 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2182 return be->dpcm[stream].state;
2184 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2186 /* set the BE runtime state */
2187 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2188 int stream, enum snd_soc_dpcm_state state)
2190 be->dpcm[stream].state = state;
2192 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2195 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2196 * are not running, paused or suspended for the specified stream direction.
2198 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2199 struct snd_soc_pcm_runtime *be, int stream)
2201 struct snd_soc_dpcm *dpcm;
2204 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2209 state = dpcm->fe->dpcm[stream].state;
2210 if (state == SND_SOC_DPCM_STATE_START ||
2211 state == SND_SOC_DPCM_STATE_PAUSED ||
2212 state == SND_SOC_DPCM_STATE_SUSPEND)
2216 /* it's safe to free/stop this BE DAI */
2219 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2222 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2223 * running, paused or suspended for the specified stream direction.
2225 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2226 struct snd_soc_pcm_runtime *be, int stream)
2228 struct snd_soc_dpcm *dpcm;
2231 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2236 state = dpcm->fe->dpcm[stream].state;
2237 if (state == SND_SOC_DPCM_STATE_START ||
2238 state == SND_SOC_DPCM_STATE_PAUSED ||
2239 state == SND_SOC_DPCM_STATE_SUSPEND ||
2240 state == SND_SOC_DPCM_STATE_PREPARE)
2244 /* it's safe to change hw_params */
2247 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2249 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2250 int cmd, struct snd_soc_platform *platform)
2252 if (platform->driver->ops && platform->driver->ops->trigger)
2253 return platform->driver->ops->trigger(substream, cmd);
2256 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2258 #ifdef CONFIG_DEBUG_FS
2259 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2262 case SND_SOC_DPCM_STATE_NEW:
2264 case SND_SOC_DPCM_STATE_OPEN:
2266 case SND_SOC_DPCM_STATE_HW_PARAMS:
2268 case SND_SOC_DPCM_STATE_PREPARE:
2270 case SND_SOC_DPCM_STATE_START:
2272 case SND_SOC_DPCM_STATE_STOP:
2274 case SND_SOC_DPCM_STATE_SUSPEND:
2276 case SND_SOC_DPCM_STATE_PAUSED:
2278 case SND_SOC_DPCM_STATE_HW_FREE:
2280 case SND_SOC_DPCM_STATE_CLOSE:
2287 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2288 int stream, char *buf, size_t size)
2290 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2291 struct snd_soc_dpcm *dpcm;
2295 offset += snprintf(buf + offset, size - offset,
2296 "[%s - %s]\n", fe->dai_link->name,
2297 stream ? "Capture" : "Playback");
2299 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2300 dpcm_state_string(fe->dpcm[stream].state));
2302 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2303 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2304 offset += snprintf(buf + offset, size - offset,
2306 "Format = %s, Channels = %d, Rate = %d\n",
2307 snd_pcm_format_name(params_format(params)),
2308 params_channels(params),
2309 params_rate(params));
2312 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2314 if (list_empty(&fe->dpcm[stream].be_clients)) {
2315 offset += snprintf(buf + offset, size - offset,
2316 " No active DSP links\n");
2320 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2321 struct snd_soc_pcm_runtime *be = dpcm->be;
2322 params = &dpcm->hw_params;
2324 offset += snprintf(buf + offset, size - offset,
2325 "- %s\n", be->dai_link->name);
2327 offset += snprintf(buf + offset, size - offset,
2329 dpcm_state_string(be->dpcm[stream].state));
2331 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2332 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2333 offset += snprintf(buf + offset, size - offset,
2334 " Hardware Params: "
2335 "Format = %s, Channels = %d, Rate = %d\n",
2336 snd_pcm_format_name(params_format(params)),
2337 params_channels(params),
2338 params_rate(params));
2345 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2346 size_t count, loff_t *ppos)
2348 struct snd_soc_pcm_runtime *fe = file->private_data;
2349 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2352 buf = kmalloc(out_count, GFP_KERNEL);
2356 if (fe->cpu_dai->driver->playback.channels_min)
2357 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2358 buf + offset, out_count - offset);
2360 if (fe->cpu_dai->driver->capture.channels_min)
2361 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2362 buf + offset, out_count - offset);
2364 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2370 static const struct file_operations dpcm_state_fops = {
2371 .open = simple_open,
2372 .read = dpcm_state_read_file,
2373 .llseek = default_llseek,
2376 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2381 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2382 rtd->card->debugfs_card_root);
2383 if (!rtd->debugfs_dpcm_root) {
2385 "ASoC: Failed to create dpcm debugfs directory %s\n",
2386 rtd->dai_link->name);
2390 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2391 rtd->debugfs_dpcm_root,
2392 rtd, &dpcm_state_fops);