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_dai_stream_valid() - check if a DAI supports the given stream
40 * Returns true if the DAI supports the indicated stream type.
42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
44 struct snd_soc_pcm_stream *codec_stream;
46 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
47 codec_stream = &dai->driver->playback;
49 codec_stream = &dai->driver->capture;
51 /* If the codec specifies any rate at all, it supports the stream. */
52 return codec_stream->rates;
56 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
57 * @rtd: ASoC PCM runtime that is activated
58 * @stream: Direction of the PCM stream
60 * Increments the active count for all the DAIs and components attached to a PCM
61 * runtime. Should typically be called when a stream is opened.
63 * Must be called with the rtd->pcm_mutex being held
65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
67 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
70 lockdep_assert_held(&rtd->pcm_mutex);
72 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
73 cpu_dai->playback_active++;
74 for (i = 0; i < rtd->num_codecs; i++)
75 rtd->codec_dais[i]->playback_active++;
77 cpu_dai->capture_active++;
78 for (i = 0; i < rtd->num_codecs; i++)
79 rtd->codec_dais[i]->capture_active++;
83 cpu_dai->component->active++;
84 for (i = 0; i < rtd->num_codecs; i++) {
85 rtd->codec_dais[i]->active++;
86 rtd->codec_dais[i]->component->active++;
91 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
92 * @rtd: ASoC PCM runtime that is deactivated
93 * @stream: Direction of the PCM stream
95 * Decrements the active count for all the DAIs and components attached to a PCM
96 * runtime. Should typically be called when a stream is closed.
98 * Must be called with the rtd->pcm_mutex being held
100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
102 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
105 lockdep_assert_held(&rtd->pcm_mutex);
107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
108 cpu_dai->playback_active--;
109 for (i = 0; i < rtd->num_codecs; i++)
110 rtd->codec_dais[i]->playback_active--;
112 cpu_dai->capture_active--;
113 for (i = 0; i < rtd->num_codecs; i++)
114 rtd->codec_dais[i]->capture_active--;
118 cpu_dai->component->active--;
119 for (i = 0; i < rtd->num_codecs; i++) {
120 rtd->codec_dais[i]->component->active--;
121 rtd->codec_dais[i]->active--;
126 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
127 * @rtd: The ASoC PCM runtime that should be checked.
129 * This function checks whether the power down delay should be ignored for a
130 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
131 * been configured to ignore the delay, or if none of the components benefits
132 * from having the delay.
134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
139 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
142 for (i = 0; i < rtd->num_codecs; i++)
143 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
145 return rtd->cpu_dai->component->ignore_pmdown_time && ignore;
149 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
150 * @substream: the pcm substream
151 * @hw: the hardware parameters
153 * Sets the substream runtime hardware parameters.
155 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
156 const struct snd_pcm_hardware *hw)
158 struct snd_pcm_runtime *runtime = substream->runtime;
159 runtime->hw.info = hw->info;
160 runtime->hw.formats = hw->formats;
161 runtime->hw.period_bytes_min = hw->period_bytes_min;
162 runtime->hw.period_bytes_max = hw->period_bytes_max;
163 runtime->hw.periods_min = hw->periods_min;
164 runtime->hw.periods_max = hw->periods_max;
165 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
166 runtime->hw.fifo_size = hw->fifo_size;
169 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
171 /* DPCM stream event, send event to FE and all active BEs. */
172 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
175 struct snd_soc_dpcm *dpcm;
177 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
179 struct snd_soc_pcm_runtime *be = dpcm->be;
181 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
182 be->dai_link->name, event, dir);
184 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
185 (be->dpcm[dir].users >= 1))
188 snd_soc_dapm_stream_event(be, dir, event);
191 snd_soc_dapm_stream_event(fe, dir, event);
196 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
197 struct snd_soc_dai *soc_dai)
199 struct snd_soc_pcm_runtime *rtd = substream->private_data;
202 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
203 rtd->dai_link->symmetric_rates)) {
204 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
207 ret = snd_pcm_hw_constraint_single(substream->runtime,
208 SNDRV_PCM_HW_PARAM_RATE,
211 dev_err(soc_dai->dev,
212 "ASoC: Unable to apply rate constraint: %d\n",
218 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
219 rtd->dai_link->symmetric_channels)) {
220 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
223 ret = snd_pcm_hw_constraint_single(substream->runtime,
224 SNDRV_PCM_HW_PARAM_CHANNELS,
227 dev_err(soc_dai->dev,
228 "ASoC: Unable to apply channel symmetry constraint: %d\n",
234 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
235 rtd->dai_link->symmetric_samplebits)) {
236 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
237 soc_dai->sample_bits);
239 ret = snd_pcm_hw_constraint_single(substream->runtime,
240 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
241 soc_dai->sample_bits);
243 dev_err(soc_dai->dev,
244 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
253 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
254 struct snd_pcm_hw_params *params)
256 struct snd_soc_pcm_runtime *rtd = substream->private_data;
257 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
258 unsigned int rate, channels, sample_bits, symmetry, i;
260 rate = params_rate(params);
261 channels = params_channels(params);
262 sample_bits = snd_pcm_format_physical_width(params_format(params));
264 /* reject unmatched parameters when applying symmetry */
265 symmetry = cpu_dai->driver->symmetric_rates ||
266 rtd->dai_link->symmetric_rates;
268 for (i = 0; i < rtd->num_codecs; i++)
269 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
271 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
272 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
273 cpu_dai->rate, rate);
277 symmetry = cpu_dai->driver->symmetric_channels ||
278 rtd->dai_link->symmetric_channels;
280 for (i = 0; i < rtd->num_codecs; i++)
281 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
283 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
284 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
285 cpu_dai->channels, channels);
289 symmetry = cpu_dai->driver->symmetric_samplebits ||
290 rtd->dai_link->symmetric_samplebits;
292 for (i = 0; i < rtd->num_codecs; i++)
293 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
295 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
296 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
297 cpu_dai->sample_bits, sample_bits);
304 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
306 struct snd_soc_pcm_runtime *rtd = substream->private_data;
307 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
308 struct snd_soc_dai_link *link = rtd->dai_link;
309 unsigned int symmetry, i;
311 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
312 cpu_driver->symmetric_channels || link->symmetric_channels ||
313 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
315 for (i = 0; i < rtd->num_codecs; i++)
316 symmetry = symmetry ||
317 rtd->codec_dais[i]->driver->symmetric_rates ||
318 rtd->codec_dais[i]->driver->symmetric_channels ||
319 rtd->codec_dais[i]->driver->symmetric_samplebits;
324 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
326 struct snd_soc_pcm_runtime *rtd = substream->private_data;
332 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
334 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
338 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
340 struct snd_soc_pcm_runtime *rtd = substream->private_data;
341 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
342 struct snd_soc_dai *codec_dai;
344 unsigned int bits = 0, cpu_bits;
346 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
347 for (i = 0; i < rtd->num_codecs; i++) {
348 codec_dai = rtd->codec_dais[i];
349 if (codec_dai->driver->playback.sig_bits == 0) {
353 bits = max(codec_dai->driver->playback.sig_bits, bits);
355 cpu_bits = cpu_dai->driver->playback.sig_bits;
357 for (i = 0; i < rtd->num_codecs; i++) {
358 codec_dai = rtd->codec_dais[i];
359 if (codec_dai->driver->capture.sig_bits == 0) {
363 bits = max(codec_dai->driver->capture.sig_bits, bits);
365 cpu_bits = cpu_dai->driver->capture.sig_bits;
368 soc_pcm_set_msb(substream, bits);
369 soc_pcm_set_msb(substream, cpu_bits);
372 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
374 struct snd_pcm_runtime *runtime = substream->runtime;
375 struct snd_pcm_hardware *hw = &runtime->hw;
376 struct snd_soc_pcm_runtime *rtd = substream->private_data;
377 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
378 struct snd_soc_dai_driver *codec_dai_drv;
379 struct snd_soc_pcm_stream *codec_stream;
380 struct snd_soc_pcm_stream *cpu_stream;
381 unsigned int chan_min = 0, chan_max = UINT_MAX;
382 unsigned int rate_min = 0, rate_max = UINT_MAX;
383 unsigned int rates = UINT_MAX;
384 u64 formats = ULLONG_MAX;
387 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
388 cpu_stream = &cpu_dai_drv->playback;
390 cpu_stream = &cpu_dai_drv->capture;
392 /* first calculate min/max only for CODECs in the DAI link */
393 for (i = 0; i < rtd->num_codecs; i++) {
396 * Skip CODECs which don't support the current stream type.
397 * Otherwise, since the rate, channel, and format values will
398 * zero in that case, we would have no usable settings left,
399 * causing the resulting setup to fail.
400 * At least one CODEC should match, otherwise we should have
401 * bailed out on a higher level, since there would be no
402 * CODEC to support the transfer direction in that case.
404 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
408 codec_dai_drv = rtd->codec_dais[i]->driver;
409 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
410 codec_stream = &codec_dai_drv->playback;
412 codec_stream = &codec_dai_drv->capture;
413 chan_min = max(chan_min, codec_stream->channels_min);
414 chan_max = min(chan_max, codec_stream->channels_max);
415 rate_min = max(rate_min, codec_stream->rate_min);
416 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
417 formats &= codec_stream->formats;
418 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
422 * chan min/max cannot be enforced if there are multiple CODEC DAIs
423 * connected to a single CPU DAI, use CPU DAI's directly and let
424 * channel allocation be fixed up later
426 if (rtd->num_codecs > 1) {
427 chan_min = cpu_stream->channels_min;
428 chan_max = cpu_stream->channels_max;
431 hw->channels_min = max(chan_min, cpu_stream->channels_min);
432 hw->channels_max = min(chan_max, cpu_stream->channels_max);
434 hw->formats &= formats & cpu_stream->formats;
436 hw->formats = formats & cpu_stream->formats;
437 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
439 snd_pcm_limit_hw_rates(runtime);
441 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
442 hw->rate_min = max(hw->rate_min, rate_min);
443 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
444 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
448 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
449 * then initialized and any private data can be allocated. This also calls
450 * startup for the cpu DAI, platform, machine and codec DAI.
452 static int soc_pcm_open(struct snd_pcm_substream *substream)
454 struct snd_soc_pcm_runtime *rtd = substream->private_data;
455 struct snd_pcm_runtime *runtime = substream->runtime;
456 struct snd_soc_platform *platform = rtd->platform;
457 struct snd_soc_component *component;
458 struct snd_soc_rtdcom_list *rtdcom;
459 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
460 struct snd_soc_dai *codec_dai;
461 const char *codec_dai_name = "multicodec";
464 pinctrl_pm_select_default_state(cpu_dai->dev);
465 for (i = 0; i < rtd->num_codecs; i++)
466 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
468 for_each_rtdcom(rtd, rtdcom) {
469 component = rtdcom->component;
471 pm_runtime_get_sync(component->dev);
474 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
476 /* startup the audio subsystem */
477 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
478 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
480 dev_err(cpu_dai->dev, "ASoC: can't open interface"
481 " %s: %d\n", cpu_dai->name, ret);
486 if (platform->driver->ops && platform->driver->ops->open) {
487 ret = platform->driver->ops->open(substream);
489 dev_err(platform->dev, "ASoC: can't open platform"
490 " %s: %d\n", platform->component.name, ret);
495 for (i = 0; i < rtd->num_codecs; i++) {
496 codec_dai = rtd->codec_dais[i];
497 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
498 ret = codec_dai->driver->ops->startup(substream,
501 dev_err(codec_dai->dev,
502 "ASoC: can't open codec %s: %d\n",
503 codec_dai->name, ret);
508 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
509 codec_dai->tx_mask = 0;
511 codec_dai->rx_mask = 0;
514 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
515 ret = rtd->dai_link->ops->startup(substream);
517 pr_err("ASoC: %s startup failed: %d\n",
518 rtd->dai_link->name, ret);
523 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
524 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
527 /* Check that the codec and cpu DAIs are compatible */
528 soc_pcm_init_runtime_hw(substream);
530 if (rtd->num_codecs == 1)
531 codec_dai_name = rtd->codec_dai->name;
533 if (soc_pcm_has_symmetry(substream))
534 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
537 if (!runtime->hw.rates) {
538 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
539 codec_dai_name, cpu_dai->name);
542 if (!runtime->hw.formats) {
543 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
544 codec_dai_name, cpu_dai->name);
547 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
548 runtime->hw.channels_min > runtime->hw.channels_max) {
549 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
550 codec_dai_name, cpu_dai->name);
554 soc_pcm_apply_msb(substream);
556 /* Symmetry only applies if we've already got an active stream. */
557 if (cpu_dai->active) {
558 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
563 for (i = 0; i < rtd->num_codecs; i++) {
564 if (rtd->codec_dais[i]->active) {
565 ret = soc_pcm_apply_symmetry(substream,
572 pr_debug("ASoC: %s <-> %s info:\n",
573 codec_dai_name, cpu_dai->name);
574 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
575 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
576 runtime->hw.channels_max);
577 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
578 runtime->hw.rate_max);
582 snd_soc_runtime_activate(rtd, substream->stream);
584 mutex_unlock(&rtd->pcm_mutex);
588 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
589 rtd->dai_link->ops->shutdown(substream);
596 codec_dai = rtd->codec_dais[i];
597 if (codec_dai->driver->ops->shutdown)
598 codec_dai->driver->ops->shutdown(substream, codec_dai);
601 if (platform->driver->ops && platform->driver->ops->close)
602 platform->driver->ops->close(substream);
605 if (cpu_dai->driver->ops->shutdown)
606 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
608 mutex_unlock(&rtd->pcm_mutex);
610 for_each_rtdcom(rtd, rtdcom) {
611 component = rtdcom->component;
613 pm_runtime_mark_last_busy(component->dev);
614 pm_runtime_put_autosuspend(component->dev);
617 for (i = 0; i < rtd->num_codecs; i++) {
618 if (!rtd->codec_dais[i]->active)
619 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
621 if (!cpu_dai->active)
622 pinctrl_pm_select_sleep_state(cpu_dai->dev);
628 * Power down the audio subsystem pmdown_time msecs after close is called.
629 * This is to ensure there are no pops or clicks in between any music tracks
630 * due to DAPM power cycling.
632 static void close_delayed_work(struct work_struct *work)
634 struct snd_soc_pcm_runtime *rtd =
635 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
636 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
638 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
640 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
641 codec_dai->driver->playback.stream_name,
642 codec_dai->playback_active ? "active" : "inactive",
643 rtd->pop_wait ? "yes" : "no");
645 /* are we waiting on this codec DAI stream */
646 if (rtd->pop_wait == 1) {
648 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
649 SND_SOC_DAPM_STREAM_STOP);
652 mutex_unlock(&rtd->pcm_mutex);
656 * Called by ALSA when a PCM substream is closed. Private data can be
657 * freed here. The cpu DAI, codec DAI, machine and platform are also
660 static int soc_pcm_close(struct snd_pcm_substream *substream)
662 struct snd_soc_pcm_runtime *rtd = substream->private_data;
663 struct snd_soc_platform *platform = rtd->platform;
664 struct snd_soc_component *component;
665 struct snd_soc_rtdcom_list *rtdcom;
666 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
667 struct snd_soc_dai *codec_dai;
670 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
672 snd_soc_runtime_deactivate(rtd, substream->stream);
674 /* clear the corresponding DAIs rate when inactive */
675 if (!cpu_dai->active)
678 for (i = 0; i < rtd->num_codecs; i++) {
679 codec_dai = rtd->codec_dais[i];
680 if (!codec_dai->active)
684 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
686 if (cpu_dai->driver->ops->shutdown)
687 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
689 for (i = 0; i < rtd->num_codecs; i++) {
690 codec_dai = rtd->codec_dais[i];
691 if (codec_dai->driver->ops->shutdown)
692 codec_dai->driver->ops->shutdown(substream, codec_dai);
695 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
696 rtd->dai_link->ops->shutdown(substream);
698 if (platform->driver->ops && platform->driver->ops->close)
699 platform->driver->ops->close(substream);
701 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
702 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
703 /* powered down playback stream now */
704 snd_soc_dapm_stream_event(rtd,
705 SNDRV_PCM_STREAM_PLAYBACK,
706 SND_SOC_DAPM_STREAM_STOP);
708 /* start delayed pop wq here for playback streams */
710 queue_delayed_work(system_power_efficient_wq,
712 msecs_to_jiffies(rtd->pmdown_time));
715 /* capture streams can be powered down now */
716 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
717 SND_SOC_DAPM_STREAM_STOP);
720 mutex_unlock(&rtd->pcm_mutex);
722 for_each_rtdcom(rtd, rtdcom) {
723 component = rtdcom->component;
725 pm_runtime_mark_last_busy(component->dev);
726 pm_runtime_put_autosuspend(component->dev);
729 for (i = 0; i < rtd->num_codecs; i++) {
730 if (!rtd->codec_dais[i]->active)
731 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
733 if (!cpu_dai->active)
734 pinctrl_pm_select_sleep_state(cpu_dai->dev);
740 * Called by ALSA when the PCM substream is prepared, can set format, sample
741 * rate, etc. This function is non atomic and can be called multiple times,
742 * it can refer to the runtime info.
744 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
746 struct snd_soc_pcm_runtime *rtd = substream->private_data;
747 struct snd_soc_platform *platform = rtd->platform;
748 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
749 struct snd_soc_dai *codec_dai;
752 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
754 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
755 ret = rtd->dai_link->ops->prepare(substream);
757 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
763 if (platform->driver->ops && platform->driver->ops->prepare) {
764 ret = platform->driver->ops->prepare(substream);
766 dev_err(platform->dev, "ASoC: platform prepare error:"
772 for (i = 0; i < rtd->num_codecs; i++) {
773 codec_dai = rtd->codec_dais[i];
774 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
775 ret = codec_dai->driver->ops->prepare(substream,
778 dev_err(codec_dai->dev,
779 "ASoC: codec DAI prepare error: %d\n",
786 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
787 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
789 dev_err(cpu_dai->dev,
790 "ASoC: cpu DAI prepare error: %d\n", ret);
795 /* cancel any delayed stream shutdown that is pending */
796 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
799 cancel_delayed_work(&rtd->delayed_work);
802 snd_soc_dapm_stream_event(rtd, substream->stream,
803 SND_SOC_DAPM_STREAM_START);
805 for (i = 0; i < rtd->num_codecs; i++)
806 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
808 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
811 mutex_unlock(&rtd->pcm_mutex);
815 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
818 struct snd_interval *interval;
819 int channels = hweight_long(mask);
821 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
822 interval->min = channels;
823 interval->max = channels;
826 int soc_dai_hw_params(struct snd_pcm_substream *substream,
827 struct snd_pcm_hw_params *params,
828 struct snd_soc_dai *dai)
832 if (dai->driver->ops && dai->driver->ops->hw_params) {
833 ret = dai->driver->ops->hw_params(substream, params, dai);
835 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
845 * Called by ALSA when the hardware params are set by application. This
846 * function can also be called multiple times and can allocate buffers
847 * (using snd_pcm_lib_* ). It's non-atomic.
849 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
850 struct snd_pcm_hw_params *params)
852 struct snd_soc_pcm_runtime *rtd = substream->private_data;
853 struct snd_soc_platform *platform = rtd->platform;
854 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
857 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
859 ret = soc_pcm_params_symmetry(substream, params);
863 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
864 ret = rtd->dai_link->ops->hw_params(substream, params);
866 dev_err(rtd->card->dev, "ASoC: machine hw_params"
867 " failed: %d\n", ret);
872 for (i = 0; i < rtd->num_codecs; i++) {
873 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
874 struct snd_pcm_hw_params codec_params;
877 * Skip CODECs which don't support the current stream type,
878 * the idea being that if a CODEC is not used for the currently
879 * set up transfer direction, it should not need to be
880 * configured, especially since the configuration used might
881 * not even be supported by that CODEC. There may be cases
882 * however where a CODEC needs to be set up although it is
883 * actually not being used for the transfer, e.g. if a
884 * capture-only CODEC is acting as an LRCLK and/or BCLK master
885 * for the DAI link including a playback-only CODEC.
886 * If this becomes necessary, we will have to augment the
887 * machine driver setup with information on how to act, so
888 * we can do the right thing here.
890 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
893 /* copy params for each codec */
894 codec_params = *params;
896 /* fixup params based on TDM slot masks */
897 if (codec_dai->tx_mask)
898 soc_pcm_codec_params_fixup(&codec_params,
900 if (codec_dai->rx_mask)
901 soc_pcm_codec_params_fixup(&codec_params,
904 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
908 codec_dai->rate = params_rate(&codec_params);
909 codec_dai->channels = params_channels(&codec_params);
910 codec_dai->sample_bits = snd_pcm_format_physical_width(
911 params_format(&codec_params));
914 ret = soc_dai_hw_params(substream, params, cpu_dai);
918 if (platform->driver->ops && platform->driver->ops->hw_params) {
919 ret = platform->driver->ops->hw_params(substream, params);
921 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
922 platform->component.name, ret);
927 /* store the parameters for each DAIs */
928 cpu_dai->rate = params_rate(params);
929 cpu_dai->channels = params_channels(params);
930 cpu_dai->sample_bits =
931 snd_pcm_format_physical_width(params_format(params));
934 mutex_unlock(&rtd->pcm_mutex);
938 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
939 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
946 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
947 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
948 codec_dai->driver->ops->hw_free(substream, codec_dai);
952 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
953 rtd->dai_link->ops->hw_free(substream);
955 mutex_unlock(&rtd->pcm_mutex);
960 * Frees resources allocated by hw_params, can be called multiple times
962 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
964 struct snd_soc_pcm_runtime *rtd = substream->private_data;
965 struct snd_soc_platform *platform = rtd->platform;
966 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
967 struct snd_soc_dai *codec_dai;
968 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
971 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
973 /* clear the corresponding DAIs parameters when going to be inactive */
974 if (cpu_dai->active == 1) {
976 cpu_dai->channels = 0;
977 cpu_dai->sample_bits = 0;
980 for (i = 0; i < rtd->num_codecs; i++) {
981 codec_dai = rtd->codec_dais[i];
982 if (codec_dai->active == 1) {
984 codec_dai->channels = 0;
985 codec_dai->sample_bits = 0;
989 /* apply codec digital mute */
990 for (i = 0; i < rtd->num_codecs; i++) {
991 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
992 (!playback && rtd->codec_dais[i]->capture_active == 1))
993 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
997 /* free any machine hw params */
998 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
999 rtd->dai_link->ops->hw_free(substream);
1001 /* free any DMA resources */
1002 if (platform->driver->ops && platform->driver->ops->hw_free)
1003 platform->driver->ops->hw_free(substream);
1005 /* now free hw params for the DAIs */
1006 for (i = 0; i < rtd->num_codecs; i++) {
1007 codec_dai = rtd->codec_dais[i];
1008 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
1009 codec_dai->driver->ops->hw_free(substream, codec_dai);
1012 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
1013 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1015 mutex_unlock(&rtd->pcm_mutex);
1019 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1021 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1022 struct snd_soc_platform *platform = rtd->platform;
1023 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1024 struct snd_soc_dai *codec_dai;
1027 for (i = 0; i < rtd->num_codecs; i++) {
1028 codec_dai = rtd->codec_dais[i];
1029 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
1030 ret = codec_dai->driver->ops->trigger(substream,
1037 if (platform->driver->ops && platform->driver->ops->trigger) {
1038 ret = platform->driver->ops->trigger(substream, cmd);
1043 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
1044 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1049 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1050 ret = rtd->dai_link->ops->trigger(substream, cmd);
1058 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1061 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1062 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1063 struct snd_soc_dai *codec_dai;
1066 for (i = 0; i < rtd->num_codecs; i++) {
1067 codec_dai = rtd->codec_dais[i];
1068 if (codec_dai->driver->ops &&
1069 codec_dai->driver->ops->bespoke_trigger) {
1070 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1077 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1078 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1085 * soc level wrapper for pointer callback
1086 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1087 * the runtime->delay will be updated accordingly.
1089 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1091 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1092 struct snd_soc_platform *platform = rtd->platform;
1093 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1094 struct snd_soc_dai *codec_dai;
1095 struct snd_pcm_runtime *runtime = substream->runtime;
1096 snd_pcm_uframes_t offset = 0;
1097 snd_pcm_sframes_t delay = 0;
1098 snd_pcm_sframes_t codec_delay = 0;
1101 if (platform->driver->ops && platform->driver->ops->pointer)
1102 offset = platform->driver->ops->pointer(substream);
1104 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1105 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1107 for (i = 0; i < rtd->num_codecs; i++) {
1108 codec_dai = rtd->codec_dais[i];
1109 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1110 codec_delay = max(codec_delay,
1111 codec_dai->driver->ops->delay(substream,
1114 delay += codec_delay;
1116 runtime->delay = delay;
1121 /* connect a FE and BE */
1122 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1123 struct snd_soc_pcm_runtime *be, int stream)
1125 struct snd_soc_dpcm *dpcm;
1127 /* only add new dpcms */
1128 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1129 if (dpcm->be == be && dpcm->fe == fe)
1133 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1139 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1140 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1141 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1142 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1144 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1145 stream ? "capture" : "playback", fe->dai_link->name,
1146 stream ? "<-" : "->", be->dai_link->name);
1148 #ifdef CONFIG_DEBUG_FS
1149 if (fe->debugfs_dpcm_root)
1150 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1151 fe->debugfs_dpcm_root, &dpcm->state);
1156 /* reparent a BE onto another FE */
1157 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1158 struct snd_soc_pcm_runtime *be, int stream)
1160 struct snd_soc_dpcm *dpcm;
1161 struct snd_pcm_substream *fe_substream, *be_substream;
1163 /* reparent if BE is connected to other FEs */
1164 if (!be->dpcm[stream].users)
1167 be_substream = snd_soc_dpcm_get_substream(be, stream);
1169 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1173 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1174 stream ? "capture" : "playback",
1175 dpcm->fe->dai_link->name,
1176 stream ? "<-" : "->", dpcm->be->dai_link->name);
1178 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1179 be_substream->runtime = fe_substream->runtime;
1184 /* disconnect a BE and FE */
1185 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1187 struct snd_soc_dpcm *dpcm, *d;
1189 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1190 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1191 stream ? "capture" : "playback",
1192 dpcm->be->dai_link->name);
1194 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1197 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1198 stream ? "capture" : "playback", fe->dai_link->name,
1199 stream ? "<-" : "->", dpcm->be->dai_link->name);
1201 /* BEs still alive need new FE */
1202 dpcm_be_reparent(fe, dpcm->be, stream);
1204 #ifdef CONFIG_DEBUG_FS
1205 debugfs_remove(dpcm->debugfs_state);
1207 list_del(&dpcm->list_be);
1208 list_del(&dpcm->list_fe);
1213 /* get BE for DAI widget and stream */
1214 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1215 struct snd_soc_dapm_widget *widget, int stream)
1217 struct snd_soc_pcm_runtime *be;
1220 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1221 list_for_each_entry(be, &card->rtd_list, list) {
1223 if (!be->dai_link->no_pcm)
1226 if (be->cpu_dai->playback_widget == widget)
1229 for (i = 0; i < be->num_codecs; i++) {
1230 struct snd_soc_dai *dai = be->codec_dais[i];
1231 if (dai->playback_widget == widget)
1237 list_for_each_entry(be, &card->rtd_list, list) {
1239 if (!be->dai_link->no_pcm)
1242 if (be->cpu_dai->capture_widget == widget)
1245 for (i = 0; i < be->num_codecs; i++) {
1246 struct snd_soc_dai *dai = be->codec_dais[i];
1247 if (dai->capture_widget == widget)
1253 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1254 stream ? "capture" : "playback", widget->name);
1258 static inline struct snd_soc_dapm_widget *
1259 dai_get_widget(struct snd_soc_dai *dai, int stream)
1261 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1262 return dai->playback_widget;
1264 return dai->capture_widget;
1267 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1268 struct snd_soc_dapm_widget *widget)
1272 for (i = 0; i < list->num_widgets; i++) {
1273 if (widget == list->widgets[i])
1280 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1281 enum snd_soc_dapm_direction dir)
1283 struct snd_soc_card *card = widget->dapm->card;
1284 struct snd_soc_pcm_runtime *rtd;
1287 if (dir == SND_SOC_DAPM_DIR_OUT) {
1288 list_for_each_entry(rtd, &card->rtd_list, list) {
1289 if (!rtd->dai_link->no_pcm)
1292 if (rtd->cpu_dai->playback_widget == widget)
1295 for (i = 0; i < rtd->num_codecs; ++i) {
1296 struct snd_soc_dai *dai = rtd->codec_dais[i];
1297 if (dai->playback_widget == widget)
1301 } else { /* SND_SOC_DAPM_DIR_IN */
1302 list_for_each_entry(rtd, &card->rtd_list, list) {
1303 if (!rtd->dai_link->no_pcm)
1306 if (rtd->cpu_dai->capture_widget == widget)
1309 for (i = 0; i < rtd->num_codecs; ++i) {
1310 struct snd_soc_dai *dai = rtd->codec_dais[i];
1311 if (dai->capture_widget == widget)
1320 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1321 int stream, struct snd_soc_dapm_widget_list **list)
1323 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1326 /* get number of valid DAI paths and their widgets */
1327 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1328 dpcm_end_walk_at_be);
1330 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1331 stream ? "capture" : "playback");
1336 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1337 struct snd_soc_dapm_widget_list **list_)
1339 struct snd_soc_dpcm *dpcm;
1340 struct snd_soc_dapm_widget_list *list = *list_;
1341 struct snd_soc_dapm_widget *widget;
1344 /* Destroy any old FE <--> BE connections */
1345 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1348 /* is there a valid CPU DAI widget for this BE */
1349 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1351 /* prune the BE if it's no longer in our active list */
1352 if (widget && widget_in_list(list, widget))
1355 /* is there a valid CODEC DAI widget for this BE */
1356 for (i = 0; i < dpcm->be->num_codecs; i++) {
1357 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1358 widget = dai_get_widget(dai, stream);
1360 /* prune the BE if it's no longer in our active list */
1361 if (widget && widget_in_list(list, widget))
1365 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1366 stream ? "capture" : "playback",
1367 dpcm->be->dai_link->name, fe->dai_link->name);
1368 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1369 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1373 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1377 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1378 struct snd_soc_dapm_widget_list **list_)
1380 struct snd_soc_card *card = fe->card;
1381 struct snd_soc_dapm_widget_list *list = *list_;
1382 struct snd_soc_pcm_runtime *be;
1383 int i, new = 0, err;
1385 /* Create any new FE <--> BE connections */
1386 for (i = 0; i < list->num_widgets; i++) {
1388 switch (list->widgets[i]->id) {
1389 case snd_soc_dapm_dai_in:
1390 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1393 case snd_soc_dapm_dai_out:
1394 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1401 /* is there a valid BE rtd for this widget */
1402 be = dpcm_get_be(card, list->widgets[i], stream);
1404 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1405 list->widgets[i]->name);
1409 /* make sure BE is a real BE */
1410 if (!be->dai_link->no_pcm)
1413 /* don't connect if FE is not running */
1414 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1417 /* newly connected FE and BE */
1418 err = dpcm_be_connect(fe, be, stream);
1420 dev_err(fe->dev, "ASoC: can't connect %s\n",
1421 list->widgets[i]->name);
1423 } else if (err == 0) /* already connected */
1427 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1431 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1436 * Find the corresponding BE DAIs that source or sink audio to this
1439 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1440 int stream, struct snd_soc_dapm_widget_list **list, int new)
1443 return dpcm_add_paths(fe, stream, list);
1445 return dpcm_prune_paths(fe, stream, list);
1448 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1450 struct snd_soc_dpcm *dpcm;
1452 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1453 dpcm->be->dpcm[stream].runtime_update =
1454 SND_SOC_DPCM_UPDATE_NO;
1457 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1460 struct snd_soc_dpcm *dpcm;
1462 /* disable any enabled and non active backends */
1463 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1465 struct snd_soc_pcm_runtime *be = dpcm->be;
1466 struct snd_pcm_substream *be_substream =
1467 snd_soc_dpcm_get_substream(be, stream);
1469 if (be->dpcm[stream].users == 0)
1470 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1471 stream ? "capture" : "playback",
1472 be->dpcm[stream].state);
1474 if (--be->dpcm[stream].users != 0)
1477 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1480 soc_pcm_close(be_substream);
1481 be_substream->runtime = NULL;
1482 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1486 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1488 struct snd_soc_dpcm *dpcm;
1491 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1492 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1494 struct snd_soc_pcm_runtime *be = dpcm->be;
1495 struct snd_pcm_substream *be_substream =
1496 snd_soc_dpcm_get_substream(be, stream);
1498 if (!be_substream) {
1499 dev_err(be->dev, "ASoC: no backend %s stream\n",
1500 stream ? "capture" : "playback");
1504 /* is this op for this BE ? */
1505 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1508 /* first time the dpcm is open ? */
1509 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1510 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1511 stream ? "capture" : "playback",
1512 be->dpcm[stream].state);
1514 if (be->dpcm[stream].users++ != 0)
1517 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1518 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1521 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1522 stream ? "capture" : "playback", be->dai_link->name);
1524 be_substream->runtime = be->dpcm[stream].runtime;
1525 err = soc_pcm_open(be_substream);
1527 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1528 be->dpcm[stream].users--;
1529 if (be->dpcm[stream].users < 0)
1530 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1531 stream ? "capture" : "playback",
1532 be->dpcm[stream].state);
1534 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1538 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1545 /* disable any enabled and non active backends */
1546 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1547 struct snd_soc_pcm_runtime *be = dpcm->be;
1548 struct snd_pcm_substream *be_substream =
1549 snd_soc_dpcm_get_substream(be, stream);
1551 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1554 if (be->dpcm[stream].users == 0)
1555 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1556 stream ? "capture" : "playback",
1557 be->dpcm[stream].state);
1559 if (--be->dpcm[stream].users != 0)
1562 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1565 soc_pcm_close(be_substream);
1566 be_substream->runtime = NULL;
1567 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1573 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1574 struct snd_soc_pcm_stream *stream,
1577 runtime->hw.rate_min = stream->rate_min;
1578 runtime->hw.rate_max = stream->rate_max;
1579 runtime->hw.channels_min = stream->channels_min;
1580 runtime->hw.channels_max = stream->channels_max;
1581 if (runtime->hw.formats)
1582 runtime->hw.formats &= formats & stream->formats;
1584 runtime->hw.formats = formats & stream->formats;
1585 runtime->hw.rates = stream->rates;
1588 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1590 struct snd_soc_pcm_runtime *fe = substream->private_data;
1591 struct snd_soc_dpcm *dpcm;
1592 u64 formats = ULLONG_MAX;
1593 int stream = substream->stream;
1595 if (!fe->dai_link->dpcm_merged_format)
1599 * It returns merged BE codec format
1600 * if FE want to use it (= dpcm_merged_format)
1603 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1604 struct snd_soc_pcm_runtime *be = dpcm->be;
1605 struct snd_soc_dai_driver *codec_dai_drv;
1606 struct snd_soc_pcm_stream *codec_stream;
1609 for (i = 0; i < be->num_codecs; i++) {
1610 codec_dai_drv = be->codec_dais[i]->driver;
1611 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1612 codec_stream = &codec_dai_drv->playback;
1614 codec_stream = &codec_dai_drv->capture;
1616 formats &= codec_stream->formats;
1623 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1625 struct snd_pcm_runtime *runtime = substream->runtime;
1626 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1627 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1628 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1629 u64 format = dpcm_runtime_base_format(substream);
1631 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1632 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1634 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1637 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1639 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1640 * for avoiding the race with trigger callback.
1641 * If the state is unset and a trigger is pending while the previous operation,
1642 * process the pending trigger action here.
1644 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1645 int stream, enum snd_soc_dpcm_update state)
1647 struct snd_pcm_substream *substream =
1648 snd_soc_dpcm_get_substream(fe, stream);
1650 snd_pcm_stream_lock_irq(substream);
1651 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1652 dpcm_fe_dai_do_trigger(substream,
1653 fe->dpcm[stream].trigger_pending - 1);
1654 fe->dpcm[stream].trigger_pending = 0;
1656 fe->dpcm[stream].runtime_update = state;
1657 snd_pcm_stream_unlock_irq(substream);
1660 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1663 struct snd_soc_dpcm *dpcm;
1664 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1665 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1668 /* apply symmetry for FE */
1669 if (soc_pcm_has_symmetry(fe_substream))
1670 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1672 /* Symmetry only applies if we've got an active stream. */
1673 if (fe_cpu_dai->active) {
1674 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1679 /* apply symmetry for BE */
1680 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1681 struct snd_soc_pcm_runtime *be = dpcm->be;
1682 struct snd_pcm_substream *be_substream =
1683 snd_soc_dpcm_get_substream(be, stream);
1684 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1687 if (rtd->dai_link->be_hw_params_fixup)
1690 if (soc_pcm_has_symmetry(be_substream))
1691 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1693 /* Symmetry only applies if we've got an active stream. */
1694 if (rtd->cpu_dai->active) {
1695 err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
1700 for (i = 0; i < rtd->num_codecs; i++) {
1701 if (rtd->codec_dais[i]->active) {
1702 err = soc_pcm_apply_symmetry(be_substream,
1703 rtd->codec_dais[i]);
1713 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1715 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1716 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1717 int stream = fe_substream->stream, ret = 0;
1719 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1721 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1723 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1727 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1729 /* start the DAI frontend */
1730 ret = soc_pcm_open(fe_substream);
1732 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1736 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1738 dpcm_set_fe_runtime(fe_substream);
1739 snd_pcm_limit_hw_rates(runtime);
1741 ret = dpcm_apply_symmetry(fe_substream, stream);
1743 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1748 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1752 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1754 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1758 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1760 struct snd_soc_dpcm *dpcm;
1762 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1763 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1765 struct snd_soc_pcm_runtime *be = dpcm->be;
1766 struct snd_pcm_substream *be_substream =
1767 snd_soc_dpcm_get_substream(be, stream);
1769 /* is this op for this BE ? */
1770 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1773 if (be->dpcm[stream].users == 0)
1774 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1775 stream ? "capture" : "playback",
1776 be->dpcm[stream].state);
1778 if (--be->dpcm[stream].users != 0)
1781 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1782 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1785 dev_dbg(be->dev, "ASoC: close BE %s\n",
1786 be->dai_link->name);
1788 soc_pcm_close(be_substream);
1789 be_substream->runtime = NULL;
1791 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1796 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1798 struct snd_soc_pcm_runtime *fe = substream->private_data;
1799 int stream = substream->stream;
1801 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1803 /* shutdown the BEs */
1804 dpcm_be_dai_shutdown(fe, substream->stream);
1806 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1808 /* now shutdown the frontend */
1809 soc_pcm_close(substream);
1811 /* run the stream event for each BE */
1812 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1814 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1815 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1819 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1821 struct snd_soc_dpcm *dpcm;
1823 /* only hw_params backends that are either sinks or sources
1824 * to this frontend DAI */
1825 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1827 struct snd_soc_pcm_runtime *be = dpcm->be;
1828 struct snd_pcm_substream *be_substream =
1829 snd_soc_dpcm_get_substream(be, stream);
1831 /* is this op for this BE ? */
1832 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1835 /* only free hw when no longer used - check all FEs */
1836 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1839 /* do not free hw if this BE is used by other FE */
1840 if (be->dpcm[stream].users > 1)
1843 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1844 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1845 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1846 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1847 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1848 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1851 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1852 be->dai_link->name);
1854 soc_pcm_hw_free(be_substream);
1856 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1862 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1864 struct snd_soc_pcm_runtime *fe = substream->private_data;
1865 int err, stream = substream->stream;
1867 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1868 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1870 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1872 /* call hw_free on the frontend */
1873 err = soc_pcm_hw_free(substream);
1875 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1876 fe->dai_link->name);
1878 /* only hw_params backends that are either sinks or sources
1879 * to this frontend DAI */
1880 err = dpcm_be_dai_hw_free(fe, stream);
1882 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1883 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1885 mutex_unlock(&fe->card->mutex);
1889 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1891 struct snd_soc_dpcm *dpcm;
1894 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1896 struct snd_soc_pcm_runtime *be = dpcm->be;
1897 struct snd_pcm_substream *be_substream =
1898 snd_soc_dpcm_get_substream(be, stream);
1900 /* is this op for this BE ? */
1901 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1904 /* copy params for each dpcm */
1905 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1906 sizeof(struct snd_pcm_hw_params));
1908 /* perform any hw_params fixups */
1909 if (be->dai_link->be_hw_params_fixup) {
1910 ret = be->dai_link->be_hw_params_fixup(be,
1914 "ASoC: hw_params BE fixup failed %d\n",
1920 /* only allow hw_params() if no connected FEs are running */
1921 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1924 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1925 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1926 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1929 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1930 be->dai_link->name);
1932 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1934 dev_err(dpcm->be->dev,
1935 "ASoC: hw_params BE failed %d\n", ret);
1939 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1944 /* disable any enabled and non active backends */
1945 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1946 struct snd_soc_pcm_runtime *be = dpcm->be;
1947 struct snd_pcm_substream *be_substream =
1948 snd_soc_dpcm_get_substream(be, stream);
1950 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1953 /* only allow hw_free() if no connected FEs are running */
1954 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1957 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1958 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1959 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1960 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1963 soc_pcm_hw_free(be_substream);
1969 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1970 struct snd_pcm_hw_params *params)
1972 struct snd_soc_pcm_runtime *fe = substream->private_data;
1973 int ret, stream = substream->stream;
1975 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1976 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1978 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1979 sizeof(struct snd_pcm_hw_params));
1980 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1982 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1986 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1987 fe->dai_link->name, params_rate(params),
1988 params_channels(params), params_format(params));
1990 /* call hw_params on the frontend */
1991 ret = soc_pcm_hw_params(substream, params);
1993 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1994 dpcm_be_dai_hw_free(fe, stream);
1996 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1999 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2000 mutex_unlock(&fe->card->mutex);
2004 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2005 struct snd_pcm_substream *substream, int cmd)
2009 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2010 dpcm->be->dai_link->name, cmd);
2012 ret = soc_pcm_trigger(substream, cmd);
2014 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2019 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2022 struct snd_soc_dpcm *dpcm;
2025 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2027 struct snd_soc_pcm_runtime *be = dpcm->be;
2028 struct snd_pcm_substream *be_substream =
2029 snd_soc_dpcm_get_substream(be, stream);
2031 /* is this op for this BE ? */
2032 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2036 case SNDRV_PCM_TRIGGER_START:
2037 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2038 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2041 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2045 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2047 case SNDRV_PCM_TRIGGER_RESUME:
2048 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2051 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2055 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2057 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2058 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2061 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2065 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2067 case SNDRV_PCM_TRIGGER_STOP:
2068 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2071 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2074 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2078 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2080 case SNDRV_PCM_TRIGGER_SUSPEND:
2081 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2084 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2087 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2091 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2093 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2094 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2097 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2100 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2104 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2111 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2113 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2115 struct snd_soc_pcm_runtime *fe = substream->private_data;
2116 int stream = substream->stream, ret;
2117 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2119 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2122 case SND_SOC_DPCM_TRIGGER_PRE:
2123 /* call trigger on the frontend before the backend. */
2125 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2126 fe->dai_link->name, cmd);
2128 ret = soc_pcm_trigger(substream, cmd);
2130 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2134 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2136 case SND_SOC_DPCM_TRIGGER_POST:
2137 /* call trigger on the frontend after the backend. */
2139 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2141 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2145 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2146 fe->dai_link->name, cmd);
2148 ret = soc_pcm_trigger(substream, cmd);
2150 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2151 /* bespoke trigger() - handles both FE and BEs */
2153 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2154 fe->dai_link->name, cmd);
2156 ret = soc_pcm_bespoke_trigger(substream, cmd);
2158 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2163 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2164 fe->dai_link->name);
2170 case SNDRV_PCM_TRIGGER_START:
2171 case SNDRV_PCM_TRIGGER_RESUME:
2172 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2173 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2175 case SNDRV_PCM_TRIGGER_STOP:
2176 case SNDRV_PCM_TRIGGER_SUSPEND:
2177 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2179 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2180 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2185 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2189 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2191 struct snd_soc_pcm_runtime *fe = substream->private_data;
2192 int stream = substream->stream;
2194 /* if FE's runtime_update is already set, we're in race;
2195 * process this trigger later at exit
2197 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2198 fe->dpcm[stream].trigger_pending = cmd + 1;
2199 return 0; /* delayed, assuming it's successful */
2202 /* we're alone, let's trigger */
2203 return dpcm_fe_dai_do_trigger(substream, cmd);
2206 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2208 struct snd_soc_dpcm *dpcm;
2211 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2213 struct snd_soc_pcm_runtime *be = dpcm->be;
2214 struct snd_pcm_substream *be_substream =
2215 snd_soc_dpcm_get_substream(be, stream);
2217 /* is this op for this BE ? */
2218 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2221 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2222 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2223 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2226 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2227 be->dai_link->name);
2229 ret = soc_pcm_prepare(be_substream);
2231 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2236 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2241 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2243 struct snd_soc_pcm_runtime *fe = substream->private_data;
2244 int stream = substream->stream, ret = 0;
2246 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2248 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2250 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2252 /* there is no point preparing this FE if there are no BEs */
2253 if (list_empty(&fe->dpcm[stream].be_clients)) {
2254 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2255 fe->dai_link->name);
2260 ret = dpcm_be_dai_prepare(fe, substream->stream);
2264 /* call prepare on the frontend */
2265 ret = soc_pcm_prepare(substream);
2267 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2268 fe->dai_link->name);
2272 /* run the stream event for each BE */
2273 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2274 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2277 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2278 mutex_unlock(&fe->card->mutex);
2283 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2284 unsigned int cmd, void *arg)
2286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2287 struct snd_soc_platform *platform = rtd->platform;
2289 if (platform->driver->ops && platform->driver->ops->ioctl)
2290 return platform->driver->ops->ioctl(substream, cmd, arg);
2291 return snd_pcm_lib_ioctl(substream, cmd, arg);
2294 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2296 struct snd_pcm_substream *substream =
2297 snd_soc_dpcm_get_substream(fe, stream);
2298 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2301 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2302 stream ? "capture" : "playback", fe->dai_link->name);
2304 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2305 /* call bespoke trigger - FE takes care of all BE triggers */
2306 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2307 fe->dai_link->name);
2309 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2311 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2313 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2314 fe->dai_link->name);
2316 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2318 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2321 err = dpcm_be_dai_hw_free(fe, stream);
2323 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2325 err = dpcm_be_dai_shutdown(fe, stream);
2327 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2329 /* run the stream event for each BE */
2330 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2335 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2337 struct snd_pcm_substream *substream =
2338 snd_soc_dpcm_get_substream(fe, stream);
2339 struct snd_soc_dpcm *dpcm;
2340 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2343 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2344 stream ? "capture" : "playback", fe->dai_link->name);
2346 /* Only start the BE if the FE is ready */
2347 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2348 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2351 /* startup must always be called for new BEs */
2352 ret = dpcm_be_dai_startup(fe, stream);
2356 /* keep going if FE state is > open */
2357 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2360 ret = dpcm_be_dai_hw_params(fe, stream);
2364 /* keep going if FE state is > hw_params */
2365 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2369 ret = dpcm_be_dai_prepare(fe, stream);
2373 /* run the stream event for each BE */
2374 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2376 /* keep going if FE state is > prepare */
2377 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2378 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2381 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2382 /* call trigger on the frontend - FE takes care of all BE triggers */
2383 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2384 fe->dai_link->name);
2386 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2388 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2392 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2393 fe->dai_link->name);
2395 ret = dpcm_be_dai_trigger(fe, stream,
2396 SNDRV_PCM_TRIGGER_START);
2398 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2406 dpcm_be_dai_hw_free(fe, stream);
2408 dpcm_be_dai_shutdown(fe, stream);
2410 /* disconnect any non started BEs */
2411 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2412 struct snd_soc_pcm_runtime *be = dpcm->be;
2413 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2414 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2420 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2424 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2425 ret = dpcm_run_update_startup(fe, stream);
2427 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2428 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2433 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2437 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2438 ret = dpcm_run_update_shutdown(fe, stream);
2440 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2441 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2446 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2449 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2451 struct snd_soc_pcm_runtime *fe;
2452 int old, new, paths;
2454 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2455 list_for_each_entry(fe, &card->rtd_list, list) {
2456 struct snd_soc_dapm_widget_list *list;
2458 /* make sure link is FE */
2459 if (!fe->dai_link->dynamic)
2462 /* only check active links */
2463 if (!fe->cpu_dai->active)
2466 /* DAPM sync will call this to update DSP paths */
2467 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2468 fe->dai_link->name);
2470 /* skip if FE doesn't have playback capability */
2471 if (!fe->cpu_dai->driver->playback.channels_min
2472 || !fe->codec_dai->driver->playback.channels_min)
2475 /* skip if FE isn't currently playing */
2476 if (!fe->cpu_dai->playback_active
2477 || !fe->codec_dai->playback_active)
2480 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2482 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2483 fe->dai_link->name, "playback");
2484 mutex_unlock(&card->mutex);
2488 /* update any new playback paths */
2489 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2491 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2492 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2493 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2496 /* update any old playback paths */
2497 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2499 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2500 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2501 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2504 dpcm_path_put(&list);
2506 /* skip if FE doesn't have capture capability */
2507 if (!fe->cpu_dai->driver->capture.channels_min
2508 || !fe->codec_dai->driver->capture.channels_min)
2511 /* skip if FE isn't currently capturing */
2512 if (!fe->cpu_dai->capture_active
2513 || !fe->codec_dai->capture_active)
2516 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2518 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2519 fe->dai_link->name, "capture");
2520 mutex_unlock(&card->mutex);
2524 /* update any new capture paths */
2525 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2527 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2528 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2529 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2532 /* update any old capture paths */
2533 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2535 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2536 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2537 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2540 dpcm_path_put(&list);
2543 mutex_unlock(&card->mutex);
2546 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2548 struct snd_soc_dpcm *dpcm;
2549 struct list_head *clients =
2550 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2552 list_for_each_entry(dpcm, clients, list_be) {
2554 struct snd_soc_pcm_runtime *be = dpcm->be;
2557 if (be->dai_link->ignore_suspend)
2560 for (i = 0; i < be->num_codecs; i++) {
2561 struct snd_soc_dai *dai = be->codec_dais[i];
2562 struct snd_soc_dai_driver *drv = dai->driver;
2564 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2565 be->dai_link->name);
2567 if (drv->ops && drv->ops->digital_mute &&
2568 dai->playback_active)
2569 drv->ops->digital_mute(dai, mute);
2576 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2578 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2579 struct snd_soc_dpcm *dpcm;
2580 struct snd_soc_dapm_widget_list *list;
2582 int stream = fe_substream->stream;
2584 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2585 fe->dpcm[stream].runtime = fe_substream->runtime;
2587 ret = dpcm_path_get(fe, stream, &list);
2589 mutex_unlock(&fe->card->mutex);
2591 } else if (ret == 0) {
2592 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2593 fe->dai_link->name, stream ? "capture" : "playback");
2596 /* calculate valid and active FE <-> BE dpcms */
2597 dpcm_process_paths(fe, stream, &list, 1);
2599 ret = dpcm_fe_dai_startup(fe_substream);
2601 /* clean up all links */
2602 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2603 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2605 dpcm_be_disconnect(fe, stream);
2606 fe->dpcm[stream].runtime = NULL;
2609 dpcm_clear_pending_state(fe, stream);
2610 dpcm_path_put(&list);
2611 mutex_unlock(&fe->card->mutex);
2615 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2617 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2618 struct snd_soc_dpcm *dpcm;
2619 int stream = fe_substream->stream, ret;
2621 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2622 ret = dpcm_fe_dai_shutdown(fe_substream);
2624 /* mark FE's links ready to prune */
2625 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2626 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2628 dpcm_be_disconnect(fe, stream);
2630 fe->dpcm[stream].runtime = NULL;
2631 mutex_unlock(&fe->card->mutex);
2635 /* create a new pcm */
2636 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2638 struct snd_soc_platform *platform = rtd->platform;
2639 struct snd_soc_dai *codec_dai;
2640 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2641 struct snd_pcm *pcm;
2643 int ret = 0, playback = 0, capture = 0;
2646 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2647 playback = rtd->dai_link->dpcm_playback;
2648 capture = rtd->dai_link->dpcm_capture;
2650 for (i = 0; i < rtd->num_codecs; i++) {
2651 codec_dai = rtd->codec_dais[i];
2652 if (codec_dai->driver->playback.channels_min)
2654 if (codec_dai->driver->capture.channels_min)
2658 capture = capture && cpu_dai->driver->capture.channels_min;
2659 playback = playback && cpu_dai->driver->playback.channels_min;
2662 if (rtd->dai_link->playback_only) {
2667 if (rtd->dai_link->capture_only) {
2672 /* create the PCM */
2673 if (rtd->dai_link->no_pcm) {
2674 snprintf(new_name, sizeof(new_name), "(%s)",
2675 rtd->dai_link->stream_name);
2677 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2678 playback, capture, &pcm);
2680 if (rtd->dai_link->dynamic)
2681 snprintf(new_name, sizeof(new_name), "%s (*)",
2682 rtd->dai_link->stream_name);
2684 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2685 rtd->dai_link->stream_name,
2686 (rtd->num_codecs > 1) ?
2687 "multicodec" : rtd->codec_dai->name, num);
2689 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2693 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2694 rtd->dai_link->name);
2697 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2699 /* DAPM dai link stream work */
2700 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2702 pcm->nonatomic = rtd->dai_link->nonatomic;
2704 pcm->private_data = rtd;
2706 if (rtd->dai_link->no_pcm) {
2708 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2710 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2714 /* ASoC PCM operations */
2715 if (rtd->dai_link->dynamic) {
2716 rtd->ops.open = dpcm_fe_dai_open;
2717 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2718 rtd->ops.prepare = dpcm_fe_dai_prepare;
2719 rtd->ops.trigger = dpcm_fe_dai_trigger;
2720 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2721 rtd->ops.close = dpcm_fe_dai_close;
2722 rtd->ops.pointer = soc_pcm_pointer;
2723 rtd->ops.ioctl = soc_pcm_ioctl;
2725 rtd->ops.open = soc_pcm_open;
2726 rtd->ops.hw_params = soc_pcm_hw_params;
2727 rtd->ops.prepare = soc_pcm_prepare;
2728 rtd->ops.trigger = soc_pcm_trigger;
2729 rtd->ops.hw_free = soc_pcm_hw_free;
2730 rtd->ops.close = soc_pcm_close;
2731 rtd->ops.pointer = soc_pcm_pointer;
2732 rtd->ops.ioctl = soc_pcm_ioctl;
2735 if (platform->driver->ops) {
2736 rtd->ops.ack = platform->driver->ops->ack;
2737 rtd->ops.copy_user = platform->driver->ops->copy_user;
2738 rtd->ops.copy_kernel = platform->driver->ops->copy_kernel;
2739 rtd->ops.fill_silence = platform->driver->ops->fill_silence;
2740 rtd->ops.page = platform->driver->ops->page;
2741 rtd->ops.mmap = platform->driver->ops->mmap;
2745 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2748 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2750 if (platform->driver->pcm_new) {
2751 ret = platform->driver->pcm_new(rtd);
2753 dev_err(platform->dev,
2754 "ASoC: pcm constructor failed: %d\n",
2760 pcm->private_free = platform->driver->pcm_free;
2762 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2763 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2768 /* is the current PCM operation for this FE ? */
2769 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2771 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2775 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2777 /* is the current PCM operation for this BE ? */
2778 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2779 struct snd_soc_pcm_runtime *be, int stream)
2781 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2782 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2783 be->dpcm[stream].runtime_update))
2787 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2789 /* get the substream for this BE */
2790 struct snd_pcm_substream *
2791 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2793 return be->pcm->streams[stream].substream;
2795 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2797 /* get the BE runtime state */
2798 enum snd_soc_dpcm_state
2799 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2801 return be->dpcm[stream].state;
2803 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2805 /* set the BE runtime state */
2806 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2807 int stream, enum snd_soc_dpcm_state state)
2809 be->dpcm[stream].state = state;
2811 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2814 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2815 * are not running, paused or suspended for the specified stream direction.
2817 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2818 struct snd_soc_pcm_runtime *be, int stream)
2820 struct snd_soc_dpcm *dpcm;
2823 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2828 state = dpcm->fe->dpcm[stream].state;
2829 if (state == SND_SOC_DPCM_STATE_START ||
2830 state == SND_SOC_DPCM_STATE_PAUSED ||
2831 state == SND_SOC_DPCM_STATE_SUSPEND)
2835 /* it's safe to free/stop this BE DAI */
2838 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2841 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2842 * running, paused or suspended for the specified stream direction.
2844 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2845 struct snd_soc_pcm_runtime *be, int stream)
2847 struct snd_soc_dpcm *dpcm;
2850 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2855 state = dpcm->fe->dpcm[stream].state;
2856 if (state == SND_SOC_DPCM_STATE_START ||
2857 state == SND_SOC_DPCM_STATE_PAUSED ||
2858 state == SND_SOC_DPCM_STATE_SUSPEND ||
2859 state == SND_SOC_DPCM_STATE_PREPARE)
2863 /* it's safe to change hw_params */
2866 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2868 #ifdef CONFIG_DEBUG_FS
2869 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
2872 case SND_SOC_DPCM_STATE_NEW:
2874 case SND_SOC_DPCM_STATE_OPEN:
2876 case SND_SOC_DPCM_STATE_HW_PARAMS:
2878 case SND_SOC_DPCM_STATE_PREPARE:
2880 case SND_SOC_DPCM_STATE_START:
2882 case SND_SOC_DPCM_STATE_STOP:
2884 case SND_SOC_DPCM_STATE_SUSPEND:
2886 case SND_SOC_DPCM_STATE_PAUSED:
2888 case SND_SOC_DPCM_STATE_HW_FREE:
2890 case SND_SOC_DPCM_STATE_CLOSE:
2897 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2898 int stream, char *buf, size_t size)
2900 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2901 struct snd_soc_dpcm *dpcm;
2905 offset += snprintf(buf + offset, size - offset,
2906 "[%s - %s]\n", fe->dai_link->name,
2907 stream ? "Capture" : "Playback");
2909 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2910 dpcm_state_string(fe->dpcm[stream].state));
2912 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2913 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2914 offset += snprintf(buf + offset, size - offset,
2916 "Format = %s, Channels = %d, Rate = %d\n",
2917 snd_pcm_format_name(params_format(params)),
2918 params_channels(params),
2919 params_rate(params));
2922 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2924 if (list_empty(&fe->dpcm[stream].be_clients)) {
2925 offset += snprintf(buf + offset, size - offset,
2926 " No active DSP links\n");
2930 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2931 struct snd_soc_pcm_runtime *be = dpcm->be;
2932 params = &dpcm->hw_params;
2934 offset += snprintf(buf + offset, size - offset,
2935 "- %s\n", be->dai_link->name);
2937 offset += snprintf(buf + offset, size - offset,
2939 dpcm_state_string(be->dpcm[stream].state));
2941 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2942 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2943 offset += snprintf(buf + offset, size - offset,
2944 " Hardware Params: "
2945 "Format = %s, Channels = %d, Rate = %d\n",
2946 snd_pcm_format_name(params_format(params)),
2947 params_channels(params),
2948 params_rate(params));
2955 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2956 size_t count, loff_t *ppos)
2958 struct snd_soc_pcm_runtime *fe = file->private_data;
2959 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2962 buf = kmalloc(out_count, GFP_KERNEL);
2966 if (fe->cpu_dai->driver->playback.channels_min)
2967 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2968 buf + offset, out_count - offset);
2970 if (fe->cpu_dai->driver->capture.channels_min)
2971 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2972 buf + offset, out_count - offset);
2974 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2980 static const struct file_operations dpcm_state_fops = {
2981 .open = simple_open,
2982 .read = dpcm_state_read_file,
2983 .llseek = default_llseek,
2986 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2991 if (!rtd->card->debugfs_card_root)
2994 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2995 rtd->card->debugfs_card_root);
2996 if (!rtd->debugfs_dpcm_root) {
2998 "ASoC: Failed to create dpcm debugfs directory %s\n",
2999 rtd->dai_link->name);
3003 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3004 rtd, &dpcm_state_fops);