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 snd_soc_dapm_stream_event(be, dir, event);
187 snd_soc_dapm_stream_event(fe, dir, event);
192 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
193 struct snd_soc_dai *soc_dai)
195 struct snd_soc_pcm_runtime *rtd = substream->private_data;
198 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
199 rtd->dai_link->symmetric_rates)) {
200 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
203 ret = snd_pcm_hw_constraint_single(substream->runtime,
204 SNDRV_PCM_HW_PARAM_RATE,
207 dev_err(soc_dai->dev,
208 "ASoC: Unable to apply rate constraint: %d\n",
214 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
215 rtd->dai_link->symmetric_channels)) {
216 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
219 ret = snd_pcm_hw_constraint_single(substream->runtime,
220 SNDRV_PCM_HW_PARAM_CHANNELS,
223 dev_err(soc_dai->dev,
224 "ASoC: Unable to apply channel symmetry constraint: %d\n",
230 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
231 rtd->dai_link->symmetric_samplebits)) {
232 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
233 soc_dai->sample_bits);
235 ret = snd_pcm_hw_constraint_single(substream->runtime,
236 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
237 soc_dai->sample_bits);
239 dev_err(soc_dai->dev,
240 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
249 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
250 struct snd_pcm_hw_params *params)
252 struct snd_soc_pcm_runtime *rtd = substream->private_data;
253 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
254 unsigned int rate, channels, sample_bits, symmetry, i;
256 rate = params_rate(params);
257 channels = params_channels(params);
258 sample_bits = snd_pcm_format_physical_width(params_format(params));
260 /* reject unmatched parameters when applying symmetry */
261 symmetry = cpu_dai->driver->symmetric_rates ||
262 rtd->dai_link->symmetric_rates;
264 for (i = 0; i < rtd->num_codecs; i++)
265 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
267 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
268 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
269 cpu_dai->rate, rate);
273 symmetry = cpu_dai->driver->symmetric_channels ||
274 rtd->dai_link->symmetric_channels;
276 for (i = 0; i < rtd->num_codecs; i++)
277 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
279 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
280 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
281 cpu_dai->channels, channels);
285 symmetry = cpu_dai->driver->symmetric_samplebits ||
286 rtd->dai_link->symmetric_samplebits;
288 for (i = 0; i < rtd->num_codecs; i++)
289 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
291 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
292 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
293 cpu_dai->sample_bits, sample_bits);
300 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
302 struct snd_soc_pcm_runtime *rtd = substream->private_data;
303 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
304 struct snd_soc_dai_link *link = rtd->dai_link;
305 unsigned int symmetry, i;
307 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
308 cpu_driver->symmetric_channels || link->symmetric_channels ||
309 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
311 for (i = 0; i < rtd->num_codecs; i++)
312 symmetry = symmetry ||
313 rtd->codec_dais[i]->driver->symmetric_rates ||
314 rtd->codec_dais[i]->driver->symmetric_channels ||
315 rtd->codec_dais[i]->driver->symmetric_samplebits;
320 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
322 struct snd_soc_pcm_runtime *rtd = substream->private_data;
328 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
330 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
334 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
336 struct snd_soc_pcm_runtime *rtd = substream->private_data;
337 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
338 struct snd_soc_dai *codec_dai;
340 unsigned int bits = 0, cpu_bits;
342 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
343 for (i = 0; i < rtd->num_codecs; i++) {
344 codec_dai = rtd->codec_dais[i];
345 if (codec_dai->driver->playback.sig_bits == 0) {
349 bits = max(codec_dai->driver->playback.sig_bits, bits);
351 cpu_bits = cpu_dai->driver->playback.sig_bits;
353 for (i = 0; i < rtd->num_codecs; i++) {
354 codec_dai = rtd->codec_dais[i];
355 if (codec_dai->driver->capture.sig_bits == 0) {
359 bits = max(codec_dai->driver->capture.sig_bits, bits);
361 cpu_bits = cpu_dai->driver->capture.sig_bits;
364 soc_pcm_set_msb(substream, bits);
365 soc_pcm_set_msb(substream, cpu_bits);
368 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
370 struct snd_pcm_runtime *runtime = substream->runtime;
371 struct snd_pcm_hardware *hw = &runtime->hw;
372 struct snd_soc_pcm_runtime *rtd = substream->private_data;
373 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
374 struct snd_soc_dai_driver *codec_dai_drv;
375 struct snd_soc_pcm_stream *codec_stream;
376 struct snd_soc_pcm_stream *cpu_stream;
377 unsigned int chan_min = 0, chan_max = UINT_MAX;
378 unsigned int rate_min = 0, rate_max = UINT_MAX;
379 unsigned int rates = UINT_MAX;
380 u64 formats = ULLONG_MAX;
383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
384 cpu_stream = &cpu_dai_drv->playback;
386 cpu_stream = &cpu_dai_drv->capture;
388 /* first calculate min/max only for CODECs in the DAI link */
389 for (i = 0; i < rtd->num_codecs; i++) {
392 * Skip CODECs which don't support the current stream type.
393 * Otherwise, since the rate, channel, and format values will
394 * zero in that case, we would have no usable settings left,
395 * causing the resulting setup to fail.
396 * At least one CODEC should match, otherwise we should have
397 * bailed out on a higher level, since there would be no
398 * CODEC to support the transfer direction in that case.
400 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
404 codec_dai_drv = rtd->codec_dais[i]->driver;
405 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
406 codec_stream = &codec_dai_drv->playback;
408 codec_stream = &codec_dai_drv->capture;
409 chan_min = max(chan_min, codec_stream->channels_min);
410 chan_max = min(chan_max, codec_stream->channels_max);
411 rate_min = max(rate_min, codec_stream->rate_min);
412 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
413 formats &= codec_stream->formats;
414 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
418 * chan min/max cannot be enforced if there are multiple CODEC DAIs
419 * connected to a single CPU DAI, use CPU DAI's directly and let
420 * channel allocation be fixed up later
422 if (rtd->num_codecs > 1) {
423 chan_min = cpu_stream->channels_min;
424 chan_max = cpu_stream->channels_max;
427 hw->channels_min = max(chan_min, cpu_stream->channels_min);
428 hw->channels_max = min(chan_max, cpu_stream->channels_max);
430 hw->formats &= formats & cpu_stream->formats;
432 hw->formats = formats & cpu_stream->formats;
433 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
435 snd_pcm_limit_hw_rates(runtime);
437 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
438 hw->rate_min = max(hw->rate_min, rate_min);
439 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
440 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
444 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
445 * then initialized and any private data can be allocated. This also calls
446 * startup for the cpu DAI, platform, machine and codec DAI.
448 static int soc_pcm_open(struct snd_pcm_substream *substream)
450 struct snd_soc_pcm_runtime *rtd = substream->private_data;
451 struct snd_pcm_runtime *runtime = substream->runtime;
452 struct snd_soc_platform *platform = rtd->platform;
453 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
454 struct snd_soc_dai *codec_dai;
455 const char *codec_dai_name = "multicodec";
458 pinctrl_pm_select_default_state(cpu_dai->dev);
459 for (i = 0; i < rtd->num_codecs; i++)
460 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
461 pm_runtime_get_sync(cpu_dai->dev);
462 for (i = 0; i < rtd->num_codecs; i++)
463 pm_runtime_get_sync(rtd->codec_dais[i]->dev);
464 pm_runtime_get_sync(platform->dev);
466 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
468 /* startup the audio subsystem */
469 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
470 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
472 dev_err(cpu_dai->dev, "ASoC: can't open interface"
473 " %s: %d\n", cpu_dai->name, ret);
478 if (platform->driver->ops && platform->driver->ops->open) {
479 ret = platform->driver->ops->open(substream);
481 dev_err(platform->dev, "ASoC: can't open platform"
482 " %s: %d\n", platform->component.name, ret);
487 for (i = 0; i < rtd->num_codecs; i++) {
488 codec_dai = rtd->codec_dais[i];
489 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
490 ret = codec_dai->driver->ops->startup(substream,
493 dev_err(codec_dai->dev,
494 "ASoC: can't open codec %s: %d\n",
495 codec_dai->name, ret);
500 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
501 codec_dai->tx_mask = 0;
503 codec_dai->rx_mask = 0;
506 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
507 ret = rtd->dai_link->ops->startup(substream);
509 pr_err("ASoC: %s startup failed: %d\n",
510 rtd->dai_link->name, ret);
515 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
516 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
519 /* Check that the codec and cpu DAIs are compatible */
520 soc_pcm_init_runtime_hw(substream);
522 if (rtd->num_codecs == 1)
523 codec_dai_name = rtd->codec_dai->name;
525 if (soc_pcm_has_symmetry(substream))
526 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
529 if (!runtime->hw.rates) {
530 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
531 codec_dai_name, cpu_dai->name);
534 if (!runtime->hw.formats) {
535 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
536 codec_dai_name, cpu_dai->name);
539 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
540 runtime->hw.channels_min > runtime->hw.channels_max) {
541 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
542 codec_dai_name, cpu_dai->name);
546 soc_pcm_apply_msb(substream);
548 /* Symmetry only applies if we've already got an active stream. */
549 if (cpu_dai->active) {
550 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
555 for (i = 0; i < rtd->num_codecs; i++) {
556 if (rtd->codec_dais[i]->active) {
557 ret = soc_pcm_apply_symmetry(substream,
564 pr_debug("ASoC: %s <-> %s info:\n",
565 codec_dai_name, cpu_dai->name);
566 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
567 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
568 runtime->hw.channels_max);
569 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
570 runtime->hw.rate_max);
574 snd_soc_runtime_activate(rtd, substream->stream);
576 mutex_unlock(&rtd->pcm_mutex);
580 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
581 rtd->dai_link->ops->shutdown(substream);
588 codec_dai = rtd->codec_dais[i];
589 if (codec_dai->driver->ops->shutdown)
590 codec_dai->driver->ops->shutdown(substream, codec_dai);
593 if (platform->driver->ops && platform->driver->ops->close)
594 platform->driver->ops->close(substream);
597 if (cpu_dai->driver->ops->shutdown)
598 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
600 mutex_unlock(&rtd->pcm_mutex);
602 pm_runtime_put(platform->dev);
603 for (i = 0; i < rtd->num_codecs; i++)
604 pm_runtime_put(rtd->codec_dais[i]->dev);
605 pm_runtime_put(cpu_dai->dev);
606 for (i = 0; i < rtd->num_codecs; i++) {
607 if (!rtd->codec_dais[i]->active)
608 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
610 if (!cpu_dai->active)
611 pinctrl_pm_select_sleep_state(cpu_dai->dev);
617 * Power down the audio subsystem pmdown_time msecs after close is called.
618 * This is to ensure there are no pops or clicks in between any music tracks
619 * due to DAPM power cycling.
621 static void close_delayed_work(struct work_struct *work)
623 struct snd_soc_pcm_runtime *rtd =
624 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
625 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
627 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
629 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
630 codec_dai->driver->playback.stream_name,
631 codec_dai->playback_active ? "active" : "inactive",
632 rtd->pop_wait ? "yes" : "no");
634 /* are we waiting on this codec DAI stream */
635 if (rtd->pop_wait == 1) {
637 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
638 SND_SOC_DAPM_STREAM_STOP);
641 mutex_unlock(&rtd->pcm_mutex);
645 * Called by ALSA when a PCM substream is closed. Private data can be
646 * freed here. The cpu DAI, codec DAI, machine and platform are also
649 static int soc_pcm_close(struct snd_pcm_substream *substream)
651 struct snd_soc_pcm_runtime *rtd = substream->private_data;
652 struct snd_soc_platform *platform = rtd->platform;
653 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
654 struct snd_soc_dai *codec_dai;
657 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
659 snd_soc_runtime_deactivate(rtd, substream->stream);
661 /* clear the corresponding DAIs rate when inactive */
662 if (!cpu_dai->active)
665 for (i = 0; i < rtd->num_codecs; i++) {
666 codec_dai = rtd->codec_dais[i];
667 if (!codec_dai->active)
671 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
673 if (cpu_dai->driver->ops->shutdown)
674 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
676 for (i = 0; i < rtd->num_codecs; i++) {
677 codec_dai = rtd->codec_dais[i];
678 if (codec_dai->driver->ops->shutdown)
679 codec_dai->driver->ops->shutdown(substream, codec_dai);
682 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
683 rtd->dai_link->ops->shutdown(substream);
685 if (platform->driver->ops && platform->driver->ops->close)
686 platform->driver->ops->close(substream);
688 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
689 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
690 /* powered down playback stream now */
691 snd_soc_dapm_stream_event(rtd,
692 SNDRV_PCM_STREAM_PLAYBACK,
693 SND_SOC_DAPM_STREAM_STOP);
695 /* start delayed pop wq here for playback streams */
697 queue_delayed_work(system_power_efficient_wq,
699 msecs_to_jiffies(rtd->pmdown_time));
702 /* capture streams can be powered down now */
703 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
704 SND_SOC_DAPM_STREAM_STOP);
707 mutex_unlock(&rtd->pcm_mutex);
709 pm_runtime_put(platform->dev);
710 for (i = 0; i < rtd->num_codecs; i++)
711 pm_runtime_put(rtd->codec_dais[i]->dev);
712 pm_runtime_put(cpu_dai->dev);
713 for (i = 0; i < rtd->num_codecs; i++) {
714 if (!rtd->codec_dais[i]->active)
715 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
717 if (!cpu_dai->active)
718 pinctrl_pm_select_sleep_state(cpu_dai->dev);
724 * Called by ALSA when the PCM substream is prepared, can set format, sample
725 * rate, etc. This function is non atomic and can be called multiple times,
726 * it can refer to the runtime info.
728 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
730 struct snd_soc_pcm_runtime *rtd = substream->private_data;
731 struct snd_soc_platform *platform = rtd->platform;
732 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
733 struct snd_soc_dai *codec_dai;
736 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
738 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
739 ret = rtd->dai_link->ops->prepare(substream);
741 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
747 if (platform->driver->ops && platform->driver->ops->prepare) {
748 ret = platform->driver->ops->prepare(substream);
750 dev_err(platform->dev, "ASoC: platform prepare error:"
756 for (i = 0; i < rtd->num_codecs; i++) {
757 codec_dai = rtd->codec_dais[i];
758 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
759 ret = codec_dai->driver->ops->prepare(substream,
762 dev_err(codec_dai->dev,
763 "ASoC: codec DAI prepare error: %d\n",
770 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
771 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
773 dev_err(cpu_dai->dev,
774 "ASoC: cpu DAI prepare error: %d\n", ret);
779 /* cancel any delayed stream shutdown that is pending */
780 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
783 cancel_delayed_work(&rtd->delayed_work);
786 snd_soc_dapm_stream_event(rtd, substream->stream,
787 SND_SOC_DAPM_STREAM_START);
789 for (i = 0; i < rtd->num_codecs; i++)
790 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
792 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
795 mutex_unlock(&rtd->pcm_mutex);
799 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
802 struct snd_interval *interval;
803 int channels = hweight_long(mask);
805 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
806 interval->min = channels;
807 interval->max = channels;
810 int soc_dai_hw_params(struct snd_pcm_substream *substream,
811 struct snd_pcm_hw_params *params,
812 struct snd_soc_dai *dai)
816 if (dai->driver->ops && dai->driver->ops->hw_params) {
817 ret = dai->driver->ops->hw_params(substream, params, dai);
819 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
829 * Called by ALSA when the hardware params are set by application. This
830 * function can also be called multiple times and can allocate buffers
831 * (using snd_pcm_lib_* ). It's non-atomic.
833 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
834 struct snd_pcm_hw_params *params)
836 struct snd_soc_pcm_runtime *rtd = substream->private_data;
837 struct snd_soc_platform *platform = rtd->platform;
838 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
841 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
843 ret = soc_pcm_params_symmetry(substream, params);
847 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
848 ret = rtd->dai_link->ops->hw_params(substream, params);
850 dev_err(rtd->card->dev, "ASoC: machine hw_params"
851 " failed: %d\n", ret);
856 for (i = 0; i < rtd->num_codecs; i++) {
857 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
858 struct snd_pcm_hw_params codec_params;
861 * Skip CODECs which don't support the current stream type,
862 * the idea being that if a CODEC is not used for the currently
863 * set up transfer direction, it should not need to be
864 * configured, especially since the configuration used might
865 * not even be supported by that CODEC. There may be cases
866 * however where a CODEC needs to be set up although it is
867 * actually not being used for the transfer, e.g. if a
868 * capture-only CODEC is acting as an LRCLK and/or BCLK master
869 * for the DAI link including a playback-only CODEC.
870 * If this becomes necessary, we will have to augment the
871 * machine driver setup with information on how to act, so
872 * we can do the right thing here.
874 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
877 /* copy params for each codec */
878 codec_params = *params;
880 /* fixup params based on TDM slot masks */
881 if (codec_dai->tx_mask)
882 soc_pcm_codec_params_fixup(&codec_params,
884 if (codec_dai->rx_mask)
885 soc_pcm_codec_params_fixup(&codec_params,
888 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
892 codec_dai->rate = params_rate(&codec_params);
893 codec_dai->channels = params_channels(&codec_params);
894 codec_dai->sample_bits = snd_pcm_format_physical_width(
895 params_format(&codec_params));
898 ret = soc_dai_hw_params(substream, params, cpu_dai);
902 if (platform->driver->ops && platform->driver->ops->hw_params) {
903 ret = platform->driver->ops->hw_params(substream, params);
905 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
906 platform->component.name, ret);
911 /* store the parameters for each DAIs */
912 cpu_dai->rate = params_rate(params);
913 cpu_dai->channels = params_channels(params);
914 cpu_dai->sample_bits =
915 snd_pcm_format_physical_width(params_format(params));
918 mutex_unlock(&rtd->pcm_mutex);
922 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
923 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
930 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
931 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
932 codec_dai->driver->ops->hw_free(substream, codec_dai);
936 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
937 rtd->dai_link->ops->hw_free(substream);
939 mutex_unlock(&rtd->pcm_mutex);
944 * Frees resources allocated by hw_params, can be called multiple times
946 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
948 struct snd_soc_pcm_runtime *rtd = substream->private_data;
949 struct snd_soc_platform *platform = rtd->platform;
950 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
951 struct snd_soc_dai *codec_dai;
952 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
955 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
957 /* clear the corresponding DAIs parameters when going to be inactive */
958 if (cpu_dai->active == 1) {
960 cpu_dai->channels = 0;
961 cpu_dai->sample_bits = 0;
964 for (i = 0; i < rtd->num_codecs; i++) {
965 codec_dai = rtd->codec_dais[i];
966 if (codec_dai->active == 1) {
968 codec_dai->channels = 0;
969 codec_dai->sample_bits = 0;
973 /* apply codec digital mute */
974 for (i = 0; i < rtd->num_codecs; i++) {
975 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
976 (!playback && rtd->codec_dais[i]->capture_active == 1))
977 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
981 /* free any machine hw params */
982 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
983 rtd->dai_link->ops->hw_free(substream);
985 /* free any DMA resources */
986 if (platform->driver->ops && platform->driver->ops->hw_free)
987 platform->driver->ops->hw_free(substream);
989 /* now free hw params for the DAIs */
990 for (i = 0; i < rtd->num_codecs; i++) {
991 codec_dai = rtd->codec_dais[i];
992 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
993 codec_dai->driver->ops->hw_free(substream, codec_dai);
996 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
997 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
999 mutex_unlock(&rtd->pcm_mutex);
1003 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1005 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1006 struct snd_soc_platform *platform = rtd->platform;
1007 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1008 struct snd_soc_dai *codec_dai;
1011 for (i = 0; i < rtd->num_codecs; i++) {
1012 codec_dai = rtd->codec_dais[i];
1013 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
1014 ret = codec_dai->driver->ops->trigger(substream,
1021 if (platform->driver->ops && platform->driver->ops->trigger) {
1022 ret = platform->driver->ops->trigger(substream, cmd);
1027 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
1028 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1033 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1034 ret = rtd->dai_link->ops->trigger(substream, cmd);
1042 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1045 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1046 struct snd_soc_platform *platform = rtd->platform;
1047 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1048 struct snd_soc_dai *codec_dai;
1051 for (i = 0; i < rtd->num_codecs; i++) {
1052 codec_dai = rtd->codec_dais[i];
1053 if (codec_dai->driver->ops &&
1054 codec_dai->driver->ops->bespoke_trigger) {
1055 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1062 if (platform->driver->bespoke_trigger) {
1063 ret = platform->driver->bespoke_trigger(substream, cmd);
1068 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1069 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1076 * soc level wrapper for pointer callback
1077 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1078 * the runtime->delay will be updated accordingly.
1080 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1082 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1083 struct snd_soc_platform *platform = rtd->platform;
1084 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1085 struct snd_soc_dai *codec_dai;
1086 struct snd_pcm_runtime *runtime = substream->runtime;
1087 snd_pcm_uframes_t offset = 0;
1088 snd_pcm_sframes_t delay = 0;
1089 snd_pcm_sframes_t codec_delay = 0;
1092 if (platform->driver->ops && platform->driver->ops->pointer)
1093 offset = platform->driver->ops->pointer(substream);
1095 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1096 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1098 for (i = 0; i < rtd->num_codecs; i++) {
1099 codec_dai = rtd->codec_dais[i];
1100 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1101 codec_delay = max(codec_delay,
1102 codec_dai->driver->ops->delay(substream,
1105 delay += codec_delay;
1108 * None of the existing platform drivers implement delay(), so
1109 * for now the codec_dai of first multicodec entry is used
1111 if (platform->driver->delay)
1112 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1114 runtime->delay = delay;
1119 /* connect a FE and BE */
1120 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1121 struct snd_soc_pcm_runtime *be, int stream)
1123 struct snd_soc_dpcm *dpcm;
1125 /* only add new dpcms */
1126 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1127 if (dpcm->be == be && dpcm->fe == fe)
1131 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1137 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1138 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1139 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1140 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1142 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1143 stream ? "capture" : "playback", fe->dai_link->name,
1144 stream ? "<-" : "->", be->dai_link->name);
1146 #ifdef CONFIG_DEBUG_FS
1147 if (fe->debugfs_dpcm_root)
1148 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1149 fe->debugfs_dpcm_root, &dpcm->state);
1154 /* reparent a BE onto another FE */
1155 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1156 struct snd_soc_pcm_runtime *be, int stream)
1158 struct snd_soc_dpcm *dpcm;
1159 struct snd_pcm_substream *fe_substream, *be_substream;
1161 /* reparent if BE is connected to other FEs */
1162 if (!be->dpcm[stream].users)
1165 be_substream = snd_soc_dpcm_get_substream(be, stream);
1167 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1171 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1172 stream ? "capture" : "playback",
1173 dpcm->fe->dai_link->name,
1174 stream ? "<-" : "->", dpcm->be->dai_link->name);
1176 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1177 be_substream->runtime = fe_substream->runtime;
1182 /* disconnect a BE and FE */
1183 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1185 struct snd_soc_dpcm *dpcm, *d;
1187 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1188 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1189 stream ? "capture" : "playback",
1190 dpcm->be->dai_link->name);
1192 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1195 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1196 stream ? "capture" : "playback", fe->dai_link->name,
1197 stream ? "<-" : "->", dpcm->be->dai_link->name);
1199 /* BEs still alive need new FE */
1200 dpcm_be_reparent(fe, dpcm->be, stream);
1202 #ifdef CONFIG_DEBUG_FS
1203 debugfs_remove(dpcm->debugfs_state);
1205 list_del(&dpcm->list_be);
1206 list_del(&dpcm->list_fe);
1211 /* get BE for DAI widget and stream */
1212 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1213 struct snd_soc_dapm_widget *widget, int stream)
1215 struct snd_soc_pcm_runtime *be;
1218 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1219 for (i = 0; i < card->num_links; i++) {
1222 if (!be->dai_link->no_pcm)
1225 if (be->cpu_dai->playback_widget == widget)
1228 for (j = 0; j < be->num_codecs; j++) {
1229 struct snd_soc_dai *dai = be->codec_dais[j];
1230 if (dai->playback_widget == widget)
1236 for (i = 0; i < card->num_links; i++) {
1239 if (!be->dai_link->no_pcm)
1242 if (be->cpu_dai->capture_widget == widget)
1245 for (j = 0; j < be->num_codecs; j++) {
1246 struct snd_soc_dai *dai = be->codec_dais[j];
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 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1281 int stream, struct snd_soc_dapm_widget_list **list)
1283 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1286 /* get number of valid DAI paths and their widgets */
1287 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list);
1289 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1290 stream ? "capture" : "playback");
1295 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1296 struct snd_soc_dapm_widget_list **list_)
1298 struct snd_soc_dpcm *dpcm;
1299 struct snd_soc_dapm_widget_list *list = *list_;
1300 struct snd_soc_dapm_widget *widget;
1303 /* Destroy any old FE <--> BE connections */
1304 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1307 /* is there a valid CPU DAI widget for this BE */
1308 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1310 /* prune the BE if it's no longer in our active list */
1311 if (widget && widget_in_list(list, widget))
1314 /* is there a valid CODEC DAI widget for this BE */
1315 for (i = 0; i < dpcm->be->num_codecs; i++) {
1316 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1317 widget = dai_get_widget(dai, stream);
1319 /* prune the BE if it's no longer in our active list */
1320 if (widget && widget_in_list(list, widget))
1324 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1325 stream ? "capture" : "playback",
1326 dpcm->be->dai_link->name, fe->dai_link->name);
1327 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1328 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1332 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1336 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1337 struct snd_soc_dapm_widget_list **list_)
1339 struct snd_soc_card *card = fe->card;
1340 struct snd_soc_dapm_widget_list *list = *list_;
1341 struct snd_soc_pcm_runtime *be;
1342 int i, new = 0, err;
1344 /* Create any new FE <--> BE connections */
1345 for (i = 0; i < list->num_widgets; i++) {
1347 switch (list->widgets[i]->id) {
1348 case snd_soc_dapm_dai_in:
1349 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1352 case snd_soc_dapm_dai_out:
1353 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1360 /* is there a valid BE rtd for this widget */
1361 be = dpcm_get_be(card, list->widgets[i], stream);
1363 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1364 list->widgets[i]->name);
1368 /* make sure BE is a real BE */
1369 if (!be->dai_link->no_pcm)
1372 /* don't connect if FE is not running */
1373 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1376 /* newly connected FE and BE */
1377 err = dpcm_be_connect(fe, be, stream);
1379 dev_err(fe->dev, "ASoC: can't connect %s\n",
1380 list->widgets[i]->name);
1382 } else if (err == 0) /* already connected */
1386 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1390 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1395 * Find the corresponding BE DAIs that source or sink audio to this
1398 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1399 int stream, struct snd_soc_dapm_widget_list **list, int new)
1402 return dpcm_add_paths(fe, stream, list);
1404 return dpcm_prune_paths(fe, stream, list);
1407 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1409 struct snd_soc_dpcm *dpcm;
1411 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1412 dpcm->be->dpcm[stream].runtime_update =
1413 SND_SOC_DPCM_UPDATE_NO;
1416 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1419 struct snd_soc_dpcm *dpcm;
1421 /* disable any enabled and non active backends */
1422 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1424 struct snd_soc_pcm_runtime *be = dpcm->be;
1425 struct snd_pcm_substream *be_substream =
1426 snd_soc_dpcm_get_substream(be, stream);
1428 if (be->dpcm[stream].users == 0)
1429 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1430 stream ? "capture" : "playback",
1431 be->dpcm[stream].state);
1433 if (--be->dpcm[stream].users != 0)
1436 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1439 soc_pcm_close(be_substream);
1440 be_substream->runtime = NULL;
1441 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1445 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1447 struct snd_soc_dpcm *dpcm;
1450 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1451 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1453 struct snd_soc_pcm_runtime *be = dpcm->be;
1454 struct snd_pcm_substream *be_substream =
1455 snd_soc_dpcm_get_substream(be, stream);
1457 if (!be_substream) {
1458 dev_err(be->dev, "ASoC: no backend %s stream\n",
1459 stream ? "capture" : "playback");
1463 /* is this op for this BE ? */
1464 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1467 /* first time the dpcm is open ? */
1468 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1469 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1470 stream ? "capture" : "playback",
1471 be->dpcm[stream].state);
1473 if (be->dpcm[stream].users++ != 0)
1476 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1477 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1480 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1481 stream ? "capture" : "playback", be->dai_link->name);
1483 be_substream->runtime = be->dpcm[stream].runtime;
1484 err = soc_pcm_open(be_substream);
1486 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1487 be->dpcm[stream].users--;
1488 if (be->dpcm[stream].users < 0)
1489 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1490 stream ? "capture" : "playback",
1491 be->dpcm[stream].state);
1493 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1497 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1504 /* disable any enabled and non active backends */
1505 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1506 struct snd_soc_pcm_runtime *be = dpcm->be;
1507 struct snd_pcm_substream *be_substream =
1508 snd_soc_dpcm_get_substream(be, stream);
1510 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1513 if (be->dpcm[stream].users == 0)
1514 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1515 stream ? "capture" : "playback",
1516 be->dpcm[stream].state);
1518 if (--be->dpcm[stream].users != 0)
1521 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1524 soc_pcm_close(be_substream);
1525 be_substream->runtime = NULL;
1526 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1532 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1533 struct snd_soc_pcm_stream *stream,
1536 runtime->hw.rate_min = stream->rate_min;
1537 runtime->hw.rate_max = stream->rate_max;
1538 runtime->hw.channels_min = stream->channels_min;
1539 runtime->hw.channels_max = stream->channels_max;
1540 if (runtime->hw.formats)
1541 runtime->hw.formats &= formats & stream->formats;
1543 runtime->hw.formats = formats & stream->formats;
1544 runtime->hw.rates = stream->rates;
1547 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1549 struct snd_soc_pcm_runtime *fe = substream->private_data;
1550 struct snd_soc_dpcm *dpcm;
1551 u64 formats = ULLONG_MAX;
1552 int stream = substream->stream;
1554 if (!fe->dai_link->dpcm_merged_format)
1558 * It returns merged BE codec format
1559 * if FE want to use it (= dpcm_merged_format)
1562 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1563 struct snd_soc_pcm_runtime *be = dpcm->be;
1564 struct snd_soc_dai_driver *codec_dai_drv;
1565 struct snd_soc_pcm_stream *codec_stream;
1568 for (i = 0; i < be->num_codecs; i++) {
1569 codec_dai_drv = be->codec_dais[i]->driver;
1570 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1571 codec_stream = &codec_dai_drv->playback;
1573 codec_stream = &codec_dai_drv->capture;
1575 formats &= codec_stream->formats;
1582 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1584 struct snd_pcm_runtime *runtime = substream->runtime;
1585 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1586 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1587 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1588 u64 format = dpcm_runtime_base_format(substream);
1590 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1591 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1593 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1596 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1598 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1599 * for avoiding the race with trigger callback.
1600 * If the state is unset and a trigger is pending while the previous operation,
1601 * process the pending trigger action here.
1603 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1604 int stream, enum snd_soc_dpcm_update state)
1606 struct snd_pcm_substream *substream =
1607 snd_soc_dpcm_get_substream(fe, stream);
1609 snd_pcm_stream_lock_irq(substream);
1610 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1611 dpcm_fe_dai_do_trigger(substream,
1612 fe->dpcm[stream].trigger_pending - 1);
1613 fe->dpcm[stream].trigger_pending = 0;
1615 fe->dpcm[stream].runtime_update = state;
1616 snd_pcm_stream_unlock_irq(substream);
1619 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1621 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1622 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1623 int stream = fe_substream->stream, ret = 0;
1625 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1627 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1629 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1633 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1635 /* start the DAI frontend */
1636 ret = soc_pcm_open(fe_substream);
1638 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1642 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1644 dpcm_set_fe_runtime(fe_substream);
1645 snd_pcm_limit_hw_rates(runtime);
1647 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1651 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1653 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1657 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1659 struct snd_soc_dpcm *dpcm;
1661 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1662 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1664 struct snd_soc_pcm_runtime *be = dpcm->be;
1665 struct snd_pcm_substream *be_substream =
1666 snd_soc_dpcm_get_substream(be, stream);
1668 /* is this op for this BE ? */
1669 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1672 if (be->dpcm[stream].users == 0)
1673 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1674 stream ? "capture" : "playback",
1675 be->dpcm[stream].state);
1677 if (--be->dpcm[stream].users != 0)
1680 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1681 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1684 dev_dbg(be->dev, "ASoC: close BE %s\n",
1685 dpcm->fe->dai_link->name);
1687 soc_pcm_close(be_substream);
1688 be_substream->runtime = NULL;
1690 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1695 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1697 struct snd_soc_pcm_runtime *fe = substream->private_data;
1698 int stream = substream->stream;
1700 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1702 /* shutdown the BEs */
1703 dpcm_be_dai_shutdown(fe, substream->stream);
1705 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1707 /* now shutdown the frontend */
1708 soc_pcm_close(substream);
1710 /* run the stream event for each BE */
1711 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1713 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1718 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1720 struct snd_soc_dpcm *dpcm;
1722 /* only hw_params backends that are either sinks or sources
1723 * to this frontend DAI */
1724 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1726 struct snd_soc_pcm_runtime *be = dpcm->be;
1727 struct snd_pcm_substream *be_substream =
1728 snd_soc_dpcm_get_substream(be, stream);
1730 /* is this op for this BE ? */
1731 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1734 /* only free hw when no longer used - check all FEs */
1735 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1738 /* do not free hw if this BE is used by other FE */
1739 if (be->dpcm[stream].users > 1)
1742 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1743 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1744 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1745 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1746 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1747 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1750 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1751 dpcm->fe->dai_link->name);
1753 soc_pcm_hw_free(be_substream);
1755 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1761 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1763 struct snd_soc_pcm_runtime *fe = substream->private_data;
1764 int err, stream = substream->stream;
1766 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1767 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1769 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1771 /* call hw_free on the frontend */
1772 err = soc_pcm_hw_free(substream);
1774 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1775 fe->dai_link->name);
1777 /* only hw_params backends that are either sinks or sources
1778 * to this frontend DAI */
1779 err = dpcm_be_dai_hw_free(fe, stream);
1781 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1782 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1784 mutex_unlock(&fe->card->mutex);
1788 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1790 struct snd_soc_dpcm *dpcm;
1793 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1795 struct snd_soc_pcm_runtime *be = dpcm->be;
1796 struct snd_pcm_substream *be_substream =
1797 snd_soc_dpcm_get_substream(be, stream);
1799 /* is this op for this BE ? */
1800 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1803 /* only allow hw_params() if no connected FEs are running */
1804 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1807 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1808 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1809 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1812 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1813 dpcm->fe->dai_link->name);
1815 /* copy params for each dpcm */
1816 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1817 sizeof(struct snd_pcm_hw_params));
1819 /* perform any hw_params fixups */
1820 if (be->dai_link->be_hw_params_fixup) {
1821 ret = be->dai_link->be_hw_params_fixup(be,
1825 "ASoC: hw_params BE fixup failed %d\n",
1831 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1833 dev_err(dpcm->be->dev,
1834 "ASoC: hw_params BE failed %d\n", ret);
1838 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1843 /* disable any enabled and non active backends */
1844 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1845 struct snd_soc_pcm_runtime *be = dpcm->be;
1846 struct snd_pcm_substream *be_substream =
1847 snd_soc_dpcm_get_substream(be, stream);
1849 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1852 /* only allow hw_free() if no connected FEs are running */
1853 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1856 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1857 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1858 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1859 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1862 soc_pcm_hw_free(be_substream);
1868 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1869 struct snd_pcm_hw_params *params)
1871 struct snd_soc_pcm_runtime *fe = substream->private_data;
1872 int ret, stream = substream->stream;
1874 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1875 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1877 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1878 sizeof(struct snd_pcm_hw_params));
1879 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1881 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1885 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1886 fe->dai_link->name, params_rate(params),
1887 params_channels(params), params_format(params));
1889 /* call hw_params on the frontend */
1890 ret = soc_pcm_hw_params(substream, params);
1892 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1893 dpcm_be_dai_hw_free(fe, stream);
1895 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1898 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1899 mutex_unlock(&fe->card->mutex);
1903 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1904 struct snd_pcm_substream *substream, int cmd)
1908 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1909 dpcm->fe->dai_link->name, cmd);
1911 ret = soc_pcm_trigger(substream, cmd);
1913 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1918 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1921 struct snd_soc_dpcm *dpcm;
1924 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1926 struct snd_soc_pcm_runtime *be = dpcm->be;
1927 struct snd_pcm_substream *be_substream =
1928 snd_soc_dpcm_get_substream(be, stream);
1930 /* is this op for this BE ? */
1931 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1935 case SNDRV_PCM_TRIGGER_START:
1936 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1940 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1946 case SNDRV_PCM_TRIGGER_RESUME:
1947 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1950 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1954 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1956 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1957 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1960 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1964 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1966 case SNDRV_PCM_TRIGGER_STOP:
1967 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1970 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1973 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1977 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1979 case SNDRV_PCM_TRIGGER_SUSPEND:
1980 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1983 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1986 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1990 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1992 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1993 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1996 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1999 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2003 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2010 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2012 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2014 struct snd_soc_pcm_runtime *fe = substream->private_data;
2015 int stream = substream->stream, ret;
2016 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2018 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2021 case SND_SOC_DPCM_TRIGGER_PRE:
2022 /* call trigger on the frontend before the backend. */
2024 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2025 fe->dai_link->name, cmd);
2027 ret = soc_pcm_trigger(substream, cmd);
2029 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2033 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2035 case SND_SOC_DPCM_TRIGGER_POST:
2036 /* call trigger on the frontend after the backend. */
2038 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2040 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2044 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2045 fe->dai_link->name, cmd);
2047 ret = soc_pcm_trigger(substream, cmd);
2049 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2050 /* bespoke trigger() - handles both FE and BEs */
2052 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2053 fe->dai_link->name, cmd);
2055 ret = soc_pcm_bespoke_trigger(substream, cmd);
2057 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2062 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2063 fe->dai_link->name);
2069 case SNDRV_PCM_TRIGGER_START:
2070 case SNDRV_PCM_TRIGGER_RESUME:
2071 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2072 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2074 case SNDRV_PCM_TRIGGER_STOP:
2075 case SNDRV_PCM_TRIGGER_SUSPEND:
2076 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2077 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2082 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2086 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2088 struct snd_soc_pcm_runtime *fe = substream->private_data;
2089 int stream = substream->stream;
2091 /* if FE's runtime_update is already set, we're in race;
2092 * process this trigger later at exit
2094 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2095 fe->dpcm[stream].trigger_pending = cmd + 1;
2096 return 0; /* delayed, assuming it's successful */
2099 /* we're alone, let's trigger */
2100 return dpcm_fe_dai_do_trigger(substream, cmd);
2103 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2105 struct snd_soc_dpcm *dpcm;
2108 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2110 struct snd_soc_pcm_runtime *be = dpcm->be;
2111 struct snd_pcm_substream *be_substream =
2112 snd_soc_dpcm_get_substream(be, stream);
2114 /* is this op for this BE ? */
2115 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2118 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2119 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2122 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2123 dpcm->fe->dai_link->name);
2125 ret = soc_pcm_prepare(be_substream);
2127 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2132 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2137 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2139 struct snd_soc_pcm_runtime *fe = substream->private_data;
2140 int stream = substream->stream, ret = 0;
2142 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2144 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2146 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2148 /* there is no point preparing this FE if there are no BEs */
2149 if (list_empty(&fe->dpcm[stream].be_clients)) {
2150 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2151 fe->dai_link->name);
2156 ret = dpcm_be_dai_prepare(fe, substream->stream);
2160 /* call prepare on the frontend */
2161 ret = soc_pcm_prepare(substream);
2163 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2164 fe->dai_link->name);
2168 /* run the stream event for each BE */
2169 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2170 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2173 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2174 mutex_unlock(&fe->card->mutex);
2179 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2180 unsigned int cmd, void *arg)
2182 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2183 struct snd_soc_platform *platform = rtd->platform;
2185 if (platform->driver->ops && platform->driver->ops->ioctl)
2186 return platform->driver->ops->ioctl(substream, cmd, arg);
2187 return snd_pcm_lib_ioctl(substream, cmd, arg);
2190 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2192 struct snd_pcm_substream *substream =
2193 snd_soc_dpcm_get_substream(fe, stream);
2194 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2197 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2198 stream ? "capture" : "playback", fe->dai_link->name);
2200 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2201 /* call bespoke trigger - FE takes care of all BE triggers */
2202 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2203 fe->dai_link->name);
2205 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2207 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2209 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2210 fe->dai_link->name);
2212 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2214 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2217 err = dpcm_be_dai_hw_free(fe, stream);
2219 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2221 err = dpcm_be_dai_shutdown(fe, stream);
2223 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2225 /* run the stream event for each BE */
2226 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2231 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2233 struct snd_pcm_substream *substream =
2234 snd_soc_dpcm_get_substream(fe, stream);
2235 struct snd_soc_dpcm *dpcm;
2236 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2239 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2240 stream ? "capture" : "playback", fe->dai_link->name);
2242 /* Only start the BE if the FE is ready */
2243 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2244 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2247 /* startup must always be called for new BEs */
2248 ret = dpcm_be_dai_startup(fe, stream);
2252 /* keep going if FE state is > open */
2253 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2256 ret = dpcm_be_dai_hw_params(fe, stream);
2260 /* keep going if FE state is > hw_params */
2261 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2265 ret = dpcm_be_dai_prepare(fe, stream);
2269 /* run the stream event for each BE */
2270 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2272 /* keep going if FE state is > prepare */
2273 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2274 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2277 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2278 /* call trigger on the frontend - FE takes care of all BE triggers */
2279 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2280 fe->dai_link->name);
2282 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2284 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2288 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2289 fe->dai_link->name);
2291 ret = dpcm_be_dai_trigger(fe, stream,
2292 SNDRV_PCM_TRIGGER_START);
2294 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2302 dpcm_be_dai_hw_free(fe, stream);
2304 dpcm_be_dai_shutdown(fe, stream);
2306 /* disconnect any non started BEs */
2307 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2308 struct snd_soc_pcm_runtime *be = dpcm->be;
2309 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2310 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2316 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2320 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2321 ret = dpcm_run_update_startup(fe, stream);
2323 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2324 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2329 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2333 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2334 ret = dpcm_run_update_shutdown(fe, stream);
2336 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2337 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2342 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2345 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2347 int i, old, new, paths;
2349 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2350 for (i = 0; i < card->num_rtd; i++) {
2351 struct snd_soc_dapm_widget_list *list;
2352 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2354 /* make sure link is FE */
2355 if (!fe->dai_link->dynamic)
2358 /* only check active links */
2359 if (!fe->cpu_dai->active)
2362 /* DAPM sync will call this to update DSP paths */
2363 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2364 fe->dai_link->name);
2366 /* skip if FE doesn't have playback capability */
2367 if (!fe->cpu_dai->driver->playback.channels_min
2368 || !fe->codec_dai->driver->playback.channels_min)
2371 /* skip if FE isn't currently playing */
2372 if (!fe->cpu_dai->playback_active
2373 || !fe->codec_dai->playback_active)
2376 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2378 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2379 fe->dai_link->name, "playback");
2380 mutex_unlock(&card->mutex);
2384 /* update any new playback paths */
2385 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2387 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2388 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2389 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2392 /* update any old playback paths */
2393 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2395 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2396 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2397 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2400 dpcm_path_put(&list);
2402 /* skip if FE doesn't have capture capability */
2403 if (!fe->cpu_dai->driver->capture.channels_min
2404 || !fe->codec_dai->driver->capture.channels_min)
2407 /* skip if FE isn't currently capturing */
2408 if (!fe->cpu_dai->capture_active
2409 || !fe->codec_dai->capture_active)
2412 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2414 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2415 fe->dai_link->name, "capture");
2416 mutex_unlock(&card->mutex);
2420 /* update any new capture paths */
2421 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2423 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2424 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2425 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2428 /* update any old capture paths */
2429 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2431 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2432 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2433 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2436 dpcm_path_put(&list);
2439 mutex_unlock(&card->mutex);
2442 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2444 struct snd_soc_dpcm *dpcm;
2445 struct list_head *clients =
2446 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2448 list_for_each_entry(dpcm, clients, list_be) {
2450 struct snd_soc_pcm_runtime *be = dpcm->be;
2453 if (be->dai_link->ignore_suspend)
2456 for (i = 0; i < be->num_codecs; i++) {
2457 struct snd_soc_dai *dai = be->codec_dais[i];
2458 struct snd_soc_dai_driver *drv = dai->driver;
2460 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2461 be->dai_link->name);
2463 if (drv->ops && drv->ops->digital_mute &&
2464 dai->playback_active)
2465 drv->ops->digital_mute(dai, mute);
2472 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2474 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2475 struct snd_soc_dpcm *dpcm;
2476 struct snd_soc_dapm_widget_list *list;
2478 int stream = fe_substream->stream;
2480 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2481 fe->dpcm[stream].runtime = fe_substream->runtime;
2483 ret = dpcm_path_get(fe, stream, &list);
2485 mutex_unlock(&fe->card->mutex);
2487 } else if (ret == 0) {
2488 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2489 fe->dai_link->name, stream ? "capture" : "playback");
2492 /* calculate valid and active FE <-> BE dpcms */
2493 dpcm_process_paths(fe, stream, &list, 1);
2495 ret = dpcm_fe_dai_startup(fe_substream);
2497 /* clean up all links */
2498 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2499 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2501 dpcm_be_disconnect(fe, stream);
2502 fe->dpcm[stream].runtime = NULL;
2505 dpcm_clear_pending_state(fe, stream);
2506 dpcm_path_put(&list);
2507 mutex_unlock(&fe->card->mutex);
2511 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2513 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2514 struct snd_soc_dpcm *dpcm;
2515 int stream = fe_substream->stream, ret;
2517 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2518 ret = dpcm_fe_dai_shutdown(fe_substream);
2520 /* mark FE's links ready to prune */
2521 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2522 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2524 dpcm_be_disconnect(fe, stream);
2526 fe->dpcm[stream].runtime = NULL;
2527 mutex_unlock(&fe->card->mutex);
2531 /* create a new pcm */
2532 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2534 struct snd_soc_platform *platform = rtd->platform;
2535 struct snd_soc_dai *codec_dai;
2536 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2537 struct snd_pcm *pcm;
2539 int ret = 0, playback = 0, capture = 0;
2542 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2543 playback = rtd->dai_link->dpcm_playback;
2544 capture = rtd->dai_link->dpcm_capture;
2546 for (i = 0; i < rtd->num_codecs; i++) {
2547 codec_dai = rtd->codec_dais[i];
2548 if (codec_dai->driver->playback.channels_min)
2550 if (codec_dai->driver->capture.channels_min)
2554 capture = capture && cpu_dai->driver->capture.channels_min;
2555 playback = playback && cpu_dai->driver->playback.channels_min;
2558 if (rtd->dai_link->playback_only) {
2563 if (rtd->dai_link->capture_only) {
2568 /* create the PCM */
2569 if (rtd->dai_link->no_pcm) {
2570 snprintf(new_name, sizeof(new_name), "(%s)",
2571 rtd->dai_link->stream_name);
2573 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2574 playback, capture, &pcm);
2576 if (rtd->dai_link->dynamic)
2577 snprintf(new_name, sizeof(new_name), "%s (*)",
2578 rtd->dai_link->stream_name);
2580 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2581 rtd->dai_link->stream_name,
2582 (rtd->num_codecs > 1) ?
2583 "multicodec" : rtd->codec_dai->name, num);
2585 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2589 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2590 rtd->dai_link->name);
2593 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2595 /* DAPM dai link stream work */
2596 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2598 pcm->nonatomic = rtd->dai_link->nonatomic;
2600 pcm->private_data = rtd;
2602 if (rtd->dai_link->no_pcm) {
2604 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2606 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2610 /* ASoC PCM operations */
2611 if (rtd->dai_link->dynamic) {
2612 rtd->ops.open = dpcm_fe_dai_open;
2613 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2614 rtd->ops.prepare = dpcm_fe_dai_prepare;
2615 rtd->ops.trigger = dpcm_fe_dai_trigger;
2616 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2617 rtd->ops.close = dpcm_fe_dai_close;
2618 rtd->ops.pointer = soc_pcm_pointer;
2619 rtd->ops.ioctl = soc_pcm_ioctl;
2621 rtd->ops.open = soc_pcm_open;
2622 rtd->ops.hw_params = soc_pcm_hw_params;
2623 rtd->ops.prepare = soc_pcm_prepare;
2624 rtd->ops.trigger = soc_pcm_trigger;
2625 rtd->ops.hw_free = soc_pcm_hw_free;
2626 rtd->ops.close = soc_pcm_close;
2627 rtd->ops.pointer = soc_pcm_pointer;
2628 rtd->ops.ioctl = soc_pcm_ioctl;
2631 if (platform->driver->ops) {
2632 rtd->ops.ack = platform->driver->ops->ack;
2633 rtd->ops.copy = platform->driver->ops->copy;
2634 rtd->ops.silence = platform->driver->ops->silence;
2635 rtd->ops.page = platform->driver->ops->page;
2636 rtd->ops.mmap = platform->driver->ops->mmap;
2640 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2643 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2645 if (platform->driver->pcm_new) {
2646 ret = platform->driver->pcm_new(rtd);
2648 dev_err(platform->dev,
2649 "ASoC: pcm constructor failed: %d\n",
2655 pcm->private_free = platform->driver->pcm_free;
2657 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2658 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2663 /* is the current PCM operation for this FE ? */
2664 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2666 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2670 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2672 /* is the current PCM operation for this BE ? */
2673 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2674 struct snd_soc_pcm_runtime *be, int stream)
2676 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2677 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2678 be->dpcm[stream].runtime_update))
2682 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2684 /* get the substream for this BE */
2685 struct snd_pcm_substream *
2686 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2688 return be->pcm->streams[stream].substream;
2690 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2692 /* get the BE runtime state */
2693 enum snd_soc_dpcm_state
2694 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2696 return be->dpcm[stream].state;
2698 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2700 /* set the BE runtime state */
2701 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2702 int stream, enum snd_soc_dpcm_state state)
2704 be->dpcm[stream].state = state;
2706 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2709 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2710 * are not running, paused or suspended for the specified stream direction.
2712 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2713 struct snd_soc_pcm_runtime *be, int stream)
2715 struct snd_soc_dpcm *dpcm;
2718 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2723 state = dpcm->fe->dpcm[stream].state;
2724 if (state == SND_SOC_DPCM_STATE_START ||
2725 state == SND_SOC_DPCM_STATE_PAUSED ||
2726 state == SND_SOC_DPCM_STATE_SUSPEND)
2730 /* it's safe to free/stop this BE DAI */
2733 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2736 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2737 * running, paused or suspended for the specified stream direction.
2739 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2740 struct snd_soc_pcm_runtime *be, int stream)
2742 struct snd_soc_dpcm *dpcm;
2745 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2750 state = dpcm->fe->dpcm[stream].state;
2751 if (state == SND_SOC_DPCM_STATE_START ||
2752 state == SND_SOC_DPCM_STATE_PAUSED ||
2753 state == SND_SOC_DPCM_STATE_SUSPEND ||
2754 state == SND_SOC_DPCM_STATE_PREPARE)
2758 /* it's safe to change hw_params */
2761 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2763 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2764 int cmd, struct snd_soc_platform *platform)
2766 if (platform->driver->ops && platform->driver->ops->trigger)
2767 return platform->driver->ops->trigger(substream, cmd);
2770 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2772 #ifdef CONFIG_DEBUG_FS
2773 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2776 case SND_SOC_DPCM_STATE_NEW:
2778 case SND_SOC_DPCM_STATE_OPEN:
2780 case SND_SOC_DPCM_STATE_HW_PARAMS:
2782 case SND_SOC_DPCM_STATE_PREPARE:
2784 case SND_SOC_DPCM_STATE_START:
2786 case SND_SOC_DPCM_STATE_STOP:
2788 case SND_SOC_DPCM_STATE_SUSPEND:
2790 case SND_SOC_DPCM_STATE_PAUSED:
2792 case SND_SOC_DPCM_STATE_HW_FREE:
2794 case SND_SOC_DPCM_STATE_CLOSE:
2801 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2802 int stream, char *buf, size_t size)
2804 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2805 struct snd_soc_dpcm *dpcm;
2809 offset += snprintf(buf + offset, size - offset,
2810 "[%s - %s]\n", fe->dai_link->name,
2811 stream ? "Capture" : "Playback");
2813 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2814 dpcm_state_string(fe->dpcm[stream].state));
2816 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2817 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2818 offset += snprintf(buf + offset, size - offset,
2820 "Format = %s, Channels = %d, Rate = %d\n",
2821 snd_pcm_format_name(params_format(params)),
2822 params_channels(params),
2823 params_rate(params));
2826 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2828 if (list_empty(&fe->dpcm[stream].be_clients)) {
2829 offset += snprintf(buf + offset, size - offset,
2830 " No active DSP links\n");
2834 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2835 struct snd_soc_pcm_runtime *be = dpcm->be;
2836 params = &dpcm->hw_params;
2838 offset += snprintf(buf + offset, size - offset,
2839 "- %s\n", be->dai_link->name);
2841 offset += snprintf(buf + offset, size - offset,
2843 dpcm_state_string(be->dpcm[stream].state));
2845 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2846 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2847 offset += snprintf(buf + offset, size - offset,
2848 " Hardware Params: "
2849 "Format = %s, Channels = %d, Rate = %d\n",
2850 snd_pcm_format_name(params_format(params)),
2851 params_channels(params),
2852 params_rate(params));
2859 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2860 size_t count, loff_t *ppos)
2862 struct snd_soc_pcm_runtime *fe = file->private_data;
2863 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2866 buf = kmalloc(out_count, GFP_KERNEL);
2870 if (fe->cpu_dai->driver->playback.channels_min)
2871 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2872 buf + offset, out_count - offset);
2874 if (fe->cpu_dai->driver->capture.channels_min)
2875 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2876 buf + offset, out_count - offset);
2878 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2884 static const struct file_operations dpcm_state_fops = {
2885 .open = simple_open,
2886 .read = dpcm_state_read_file,
2887 .llseek = default_llseek,
2890 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2895 if (!rtd->card->debugfs_card_root)
2898 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2899 rtd->card->debugfs_card_root);
2900 if (!rtd->debugfs_dpcm_root) {
2902 "ASoC: Failed to create dpcm debugfs directory %s\n",
2903 rtd->dai_link->name);
2907 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2908 rtd->debugfs_dpcm_root,
2909 rtd, &dpcm_state_fops);