1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-pcm.c -- ALSA SoC PCM
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/initval.h>
29 #define DPCM_MAX_BE_USERS 8
32 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
34 * Returns true if the DAI supports the indicated stream type.
36 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
38 struct snd_soc_pcm_stream *codec_stream;
40 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
41 codec_stream = &dai->driver->playback;
43 codec_stream = &dai->driver->capture;
45 /* If the codec specifies any channels at all, it supports the stream */
46 return codec_stream->channels_min;
50 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
51 * @rtd: ASoC PCM runtime that is activated
52 * @stream: Direction of the PCM stream
54 * Increments the active count for all the DAIs and components attached to a PCM
55 * runtime. Should typically be called when a stream is opened.
57 * Must be called with the rtd->pcm_mutex being held
59 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
61 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
64 lockdep_assert_held(&rtd->pcm_mutex);
66 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
67 cpu_dai->playback_active++;
68 for (i = 0; i < rtd->num_codecs; i++)
69 rtd->codec_dais[i]->playback_active++;
71 cpu_dai->capture_active++;
72 for (i = 0; i < rtd->num_codecs; i++)
73 rtd->codec_dais[i]->capture_active++;
77 cpu_dai->component->active++;
78 for (i = 0; i < rtd->num_codecs; i++) {
79 rtd->codec_dais[i]->active++;
80 rtd->codec_dais[i]->component->active++;
85 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
86 * @rtd: ASoC PCM runtime that is deactivated
87 * @stream: Direction of the PCM stream
89 * Decrements the active count for all the DAIs and components attached to a PCM
90 * runtime. Should typically be called when a stream is closed.
92 * Must be called with the rtd->pcm_mutex being held
94 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
96 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
99 lockdep_assert_held(&rtd->pcm_mutex);
101 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
102 cpu_dai->playback_active--;
103 for (i = 0; i < rtd->num_codecs; i++)
104 rtd->codec_dais[i]->playback_active--;
106 cpu_dai->capture_active--;
107 for (i = 0; i < rtd->num_codecs; i++)
108 rtd->codec_dais[i]->capture_active--;
112 cpu_dai->component->active--;
113 for (i = 0; i < rtd->num_codecs; i++) {
114 rtd->codec_dais[i]->component->active--;
115 rtd->codec_dais[i]->active--;
120 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
121 * @rtd: The ASoC PCM runtime that should be checked.
123 * This function checks whether the power down delay should be ignored for a
124 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
125 * been configured to ignore the delay, or if none of the components benefits
126 * from having the delay.
128 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
130 struct snd_soc_rtdcom_list *rtdcom;
131 struct snd_soc_component *component;
134 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
137 for_each_rtdcom(rtd, rtdcom) {
138 component = rtdcom->component;
140 ignore &= !component->driver->use_pmdown_time;
147 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
148 * @substream: the pcm substream
149 * @hw: the hardware parameters
151 * Sets the substream runtime hardware parameters.
153 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
154 const struct snd_pcm_hardware *hw)
156 struct snd_pcm_runtime *runtime = substream->runtime;
157 runtime->hw.info = hw->info;
158 runtime->hw.formats = hw->formats;
159 runtime->hw.period_bytes_min = hw->period_bytes_min;
160 runtime->hw.period_bytes_max = hw->period_bytes_max;
161 runtime->hw.periods_min = hw->periods_min;
162 runtime->hw.periods_max = hw->periods_max;
163 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
164 runtime->hw.fifo_size = hw->fifo_size;
167 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
169 /* DPCM stream event, send event to FE and all active BEs. */
170 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
173 struct snd_soc_dpcm *dpcm;
175 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
177 struct snd_soc_pcm_runtime *be = dpcm->be;
179 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
180 be->dai_link->name, event, dir);
182 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
183 (be->dpcm[dir].users >= 1))
186 snd_soc_dapm_stream_event(be, dir, event);
189 snd_soc_dapm_stream_event(fe, dir, event);
194 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
195 struct snd_soc_dai *soc_dai)
197 struct snd_soc_pcm_runtime *rtd = substream->private_data;
200 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
201 rtd->dai_link->symmetric_rates)) {
202 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
205 ret = snd_pcm_hw_constraint_single(substream->runtime,
206 SNDRV_PCM_HW_PARAM_RATE,
209 dev_err(soc_dai->dev,
210 "ASoC: Unable to apply rate constraint: %d\n",
216 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
217 rtd->dai_link->symmetric_channels)) {
218 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
221 ret = snd_pcm_hw_constraint_single(substream->runtime,
222 SNDRV_PCM_HW_PARAM_CHANNELS,
225 dev_err(soc_dai->dev,
226 "ASoC: Unable to apply channel symmetry constraint: %d\n",
232 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
233 rtd->dai_link->symmetric_samplebits)) {
234 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
235 soc_dai->sample_bits);
237 ret = snd_pcm_hw_constraint_single(substream->runtime,
238 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
239 soc_dai->sample_bits);
241 dev_err(soc_dai->dev,
242 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
251 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
252 struct snd_pcm_hw_params *params)
254 struct snd_soc_pcm_runtime *rtd = substream->private_data;
255 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
256 unsigned int rate, channels, sample_bits, symmetry, i;
258 rate = params_rate(params);
259 channels = params_channels(params);
260 sample_bits = snd_pcm_format_physical_width(params_format(params));
262 /* reject unmatched parameters when applying symmetry */
263 symmetry = cpu_dai->driver->symmetric_rates ||
264 rtd->dai_link->symmetric_rates;
266 for (i = 0; i < rtd->num_codecs; i++)
267 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
269 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
270 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
271 cpu_dai->rate, rate);
275 symmetry = cpu_dai->driver->symmetric_channels ||
276 rtd->dai_link->symmetric_channels;
278 for (i = 0; i < rtd->num_codecs; i++)
279 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
281 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
282 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
283 cpu_dai->channels, channels);
287 symmetry = cpu_dai->driver->symmetric_samplebits ||
288 rtd->dai_link->symmetric_samplebits;
290 for (i = 0; i < rtd->num_codecs; i++)
291 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
293 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
294 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
295 cpu_dai->sample_bits, sample_bits);
302 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
304 struct snd_soc_pcm_runtime *rtd = substream->private_data;
305 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
306 struct snd_soc_dai_link *link = rtd->dai_link;
307 unsigned int symmetry, i;
309 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
310 cpu_driver->symmetric_channels || link->symmetric_channels ||
311 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
313 for (i = 0; i < rtd->num_codecs; i++)
314 symmetry = symmetry ||
315 rtd->codec_dais[i]->driver->symmetric_rates ||
316 rtd->codec_dais[i]->driver->symmetric_channels ||
317 rtd->codec_dais[i]->driver->symmetric_samplebits;
322 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
324 struct snd_soc_pcm_runtime *rtd = substream->private_data;
330 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
332 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
336 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
338 struct snd_soc_pcm_runtime *rtd = substream->private_data;
339 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
340 struct snd_soc_dai *codec_dai;
342 unsigned int bits = 0, cpu_bits;
344 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
345 for (i = 0; i < rtd->num_codecs; i++) {
346 codec_dai = rtd->codec_dais[i];
347 if (codec_dai->driver->playback.sig_bits == 0) {
351 bits = max(codec_dai->driver->playback.sig_bits, bits);
353 cpu_bits = cpu_dai->driver->playback.sig_bits;
355 for (i = 0; i < rtd->num_codecs; i++) {
356 codec_dai = rtd->codec_dais[i];
357 if (codec_dai->driver->capture.sig_bits == 0) {
361 bits = max(codec_dai->driver->capture.sig_bits, bits);
363 cpu_bits = cpu_dai->driver->capture.sig_bits;
366 soc_pcm_set_msb(substream, bits);
367 soc_pcm_set_msb(substream, cpu_bits);
370 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
372 struct snd_pcm_runtime *runtime = substream->runtime;
373 struct snd_pcm_hardware *hw = &runtime->hw;
374 struct snd_soc_pcm_runtime *rtd = substream->private_data;
375 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
376 struct snd_soc_dai_driver *codec_dai_drv;
377 struct snd_soc_pcm_stream *codec_stream;
378 struct snd_soc_pcm_stream *cpu_stream;
379 unsigned int chan_min = 0, chan_max = UINT_MAX;
380 unsigned int rate_min = 0, rate_max = UINT_MAX;
381 unsigned int rates = UINT_MAX;
382 u64 formats = ULLONG_MAX;
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 cpu_stream = &cpu_dai_drv->playback;
388 cpu_stream = &cpu_dai_drv->capture;
390 /* first calculate min/max only for CODECs in the DAI link */
391 for (i = 0; i < rtd->num_codecs; i++) {
394 * Skip CODECs which don't support the current stream type.
395 * Otherwise, since the rate, channel, and format values will
396 * zero in that case, we would have no usable settings left,
397 * causing the resulting setup to fail.
398 * At least one CODEC should match, otherwise we should have
399 * bailed out on a higher level, since there would be no
400 * CODEC to support the transfer direction in that case.
402 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
406 codec_dai_drv = rtd->codec_dais[i]->driver;
407 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
408 codec_stream = &codec_dai_drv->playback;
410 codec_stream = &codec_dai_drv->capture;
411 chan_min = max(chan_min, codec_stream->channels_min);
412 chan_max = min(chan_max, codec_stream->channels_max);
413 rate_min = max(rate_min, codec_stream->rate_min);
414 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
415 formats &= codec_stream->formats;
416 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
420 * chan min/max cannot be enforced if there are multiple CODEC DAIs
421 * connected to a single CPU DAI, use CPU DAI's directly and let
422 * channel allocation be fixed up later
424 if (rtd->num_codecs > 1) {
425 chan_min = cpu_stream->channels_min;
426 chan_max = cpu_stream->channels_max;
429 hw->channels_min = max(chan_min, cpu_stream->channels_min);
430 hw->channels_max = min(chan_max, cpu_stream->channels_max);
432 hw->formats &= formats & cpu_stream->formats;
434 hw->formats = formats & cpu_stream->formats;
435 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
437 snd_pcm_limit_hw_rates(runtime);
439 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
440 hw->rate_min = max(hw->rate_min, rate_min);
441 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
442 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
445 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
446 struct snd_soc_component *last)
448 struct snd_soc_pcm_runtime *rtd = substream->private_data;
449 struct snd_soc_rtdcom_list *rtdcom;
450 struct snd_soc_component *component;
452 for_each_rtdcom(rtd, rtdcom) {
453 component = rtdcom->component;
455 if (component == last)
458 if (!component->driver->ops ||
459 !component->driver->ops->close)
462 component->driver->ops->close(substream);
469 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
470 * then initialized and any private data can be allocated. This also calls
471 * startup for the cpu DAI, component, machine and codec DAI.
473 static int soc_pcm_open(struct snd_pcm_substream *substream)
475 struct snd_soc_pcm_runtime *rtd = substream->private_data;
476 struct snd_pcm_runtime *runtime = substream->runtime;
477 struct snd_soc_component *component;
478 struct snd_soc_rtdcom_list *rtdcom;
479 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
480 struct snd_soc_dai *codec_dai;
481 const char *codec_dai_name = "multicodec";
484 pinctrl_pm_select_default_state(cpu_dai->dev);
485 for (i = 0; i < rtd->num_codecs; i++)
486 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
488 for_each_rtdcom(rtd, rtdcom) {
489 component = rtdcom->component;
491 pm_runtime_get_sync(component->dev);
494 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
496 /* startup the audio subsystem */
497 if (cpu_dai->driver->ops->startup) {
498 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
500 dev_err(cpu_dai->dev, "ASoC: can't open interface"
501 " %s: %d\n", cpu_dai->name, ret);
506 for_each_rtdcom(rtd, rtdcom) {
507 component = rtdcom->component;
509 if (!component->driver->ops ||
510 !component->driver->ops->open)
513 ret = component->driver->ops->open(substream);
515 dev_err(component->dev,
516 "ASoC: can't open component %s: %d\n",
517 component->name, ret);
523 for (i = 0; i < rtd->num_codecs; i++) {
524 codec_dai = rtd->codec_dais[i];
525 if (codec_dai->driver->ops->startup) {
526 ret = codec_dai->driver->ops->startup(substream,
529 dev_err(codec_dai->dev,
530 "ASoC: can't open codec %s: %d\n",
531 codec_dai->name, ret);
536 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
537 codec_dai->tx_mask = 0;
539 codec_dai->rx_mask = 0;
542 if (rtd->dai_link->ops->startup) {
543 ret = rtd->dai_link->ops->startup(substream);
545 pr_err("ASoC: %s startup failed: %d\n",
546 rtd->dai_link->name, ret);
551 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
552 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
555 /* Check that the codec and cpu DAIs are compatible */
556 soc_pcm_init_runtime_hw(substream);
558 if (rtd->num_codecs == 1)
559 codec_dai_name = rtd->codec_dai->name;
561 if (soc_pcm_has_symmetry(substream))
562 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
565 if (!runtime->hw.rates) {
566 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
567 codec_dai_name, cpu_dai->name);
570 if (!runtime->hw.formats) {
571 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
572 codec_dai_name, cpu_dai->name);
575 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
576 runtime->hw.channels_min > runtime->hw.channels_max) {
577 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
578 codec_dai_name, cpu_dai->name);
582 soc_pcm_apply_msb(substream);
584 /* Symmetry only applies if we've already got an active stream. */
585 if (cpu_dai->active) {
586 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
591 for (i = 0; i < rtd->num_codecs; i++) {
592 if (rtd->codec_dais[i]->active) {
593 ret = soc_pcm_apply_symmetry(substream,
600 pr_debug("ASoC: %s <-> %s info:\n",
601 codec_dai_name, cpu_dai->name);
602 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
603 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
604 runtime->hw.channels_max);
605 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
606 runtime->hw.rate_max);
610 snd_soc_runtime_activate(rtd, substream->stream);
612 mutex_unlock(&rtd->pcm_mutex);
616 if (rtd->dai_link->ops->shutdown)
617 rtd->dai_link->ops->shutdown(substream);
624 codec_dai = rtd->codec_dais[i];
625 if (codec_dai->driver->ops->shutdown)
626 codec_dai->driver->ops->shutdown(substream, codec_dai);
630 soc_pcm_components_close(substream, component);
632 if (cpu_dai->driver->ops->shutdown)
633 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
635 mutex_unlock(&rtd->pcm_mutex);
637 for_each_rtdcom(rtd, rtdcom) {
638 component = rtdcom->component;
640 pm_runtime_mark_last_busy(component->dev);
641 pm_runtime_put_autosuspend(component->dev);
644 for (i = 0; i < rtd->num_codecs; i++) {
645 if (!rtd->codec_dais[i]->active)
646 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
648 if (!cpu_dai->active)
649 pinctrl_pm_select_sleep_state(cpu_dai->dev);
655 * Power down the audio subsystem pmdown_time msecs after close is called.
656 * This is to ensure there are no pops or clicks in between any music tracks
657 * due to DAPM power cycling.
659 static void close_delayed_work(struct work_struct *work)
661 struct snd_soc_pcm_runtime *rtd =
662 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
663 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
665 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
667 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
668 codec_dai->driver->playback.stream_name,
669 codec_dai->playback_active ? "active" : "inactive",
670 rtd->pop_wait ? "yes" : "no");
672 /* are we waiting on this codec DAI stream */
673 if (rtd->pop_wait == 1) {
675 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
676 SND_SOC_DAPM_STREAM_STOP);
679 mutex_unlock(&rtd->pcm_mutex);
683 * Called by ALSA when a PCM substream is closed. Private data can be
684 * freed here. The cpu DAI, codec DAI, machine and components are also
687 static int soc_pcm_close(struct snd_pcm_substream *substream)
689 struct snd_soc_pcm_runtime *rtd = substream->private_data;
690 struct snd_soc_component *component;
691 struct snd_soc_rtdcom_list *rtdcom;
692 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
693 struct snd_soc_dai *codec_dai;
696 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
698 snd_soc_runtime_deactivate(rtd, substream->stream);
700 /* clear the corresponding DAIs rate when inactive */
701 if (!cpu_dai->active)
704 for (i = 0; i < rtd->num_codecs; i++) {
705 codec_dai = rtd->codec_dais[i];
706 if (!codec_dai->active)
710 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
712 if (cpu_dai->driver->ops->shutdown)
713 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
715 for (i = 0; i < rtd->num_codecs; i++) {
716 codec_dai = rtd->codec_dais[i];
717 if (codec_dai->driver->ops->shutdown)
718 codec_dai->driver->ops->shutdown(substream, codec_dai);
721 if (rtd->dai_link->ops->shutdown)
722 rtd->dai_link->ops->shutdown(substream);
724 soc_pcm_components_close(substream, NULL);
726 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
727 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
728 /* powered down playback stream now */
729 snd_soc_dapm_stream_event(rtd,
730 SNDRV_PCM_STREAM_PLAYBACK,
731 SND_SOC_DAPM_STREAM_STOP);
733 /* start delayed pop wq here for playback streams */
735 queue_delayed_work(system_power_efficient_wq,
737 msecs_to_jiffies(rtd->pmdown_time));
740 /* capture streams can be powered down now */
741 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
742 SND_SOC_DAPM_STREAM_STOP);
745 mutex_unlock(&rtd->pcm_mutex);
747 for_each_rtdcom(rtd, rtdcom) {
748 component = rtdcom->component;
750 pm_runtime_mark_last_busy(component->dev);
751 pm_runtime_put_autosuspend(component->dev);
754 for (i = 0; i < rtd->num_codecs; i++) {
755 if (!rtd->codec_dais[i]->active)
756 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
758 if (!cpu_dai->active)
759 pinctrl_pm_select_sleep_state(cpu_dai->dev);
765 * Called by ALSA when the PCM substream is prepared, can set format, sample
766 * rate, etc. This function is non atomic and can be called multiple times,
767 * it can refer to the runtime info.
769 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
771 struct snd_soc_pcm_runtime *rtd = substream->private_data;
772 struct snd_soc_component *component;
773 struct snd_soc_rtdcom_list *rtdcom;
774 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
775 struct snd_soc_dai *codec_dai;
778 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
780 if (rtd->dai_link->ops->prepare) {
781 ret = rtd->dai_link->ops->prepare(substream);
783 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
789 for_each_rtdcom(rtd, rtdcom) {
790 component = rtdcom->component;
792 if (!component->driver->ops ||
793 !component->driver->ops->prepare)
796 ret = component->driver->ops->prepare(substream);
798 dev_err(component->dev,
799 "ASoC: platform prepare error: %d\n", ret);
804 for (i = 0; i < rtd->num_codecs; i++) {
805 codec_dai = rtd->codec_dais[i];
806 if (codec_dai->driver->ops->prepare) {
807 ret = codec_dai->driver->ops->prepare(substream,
810 dev_err(codec_dai->dev,
811 "ASoC: codec DAI prepare error: %d\n",
818 if (cpu_dai->driver->ops->prepare) {
819 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
821 dev_err(cpu_dai->dev,
822 "ASoC: cpu DAI prepare error: %d\n", ret);
827 /* cancel any delayed stream shutdown that is pending */
828 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
831 cancel_delayed_work(&rtd->delayed_work);
834 snd_soc_dapm_stream_event(rtd, substream->stream,
835 SND_SOC_DAPM_STREAM_START);
837 for (i = 0; i < rtd->num_codecs; i++)
838 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
840 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
843 mutex_unlock(&rtd->pcm_mutex);
847 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
850 struct snd_interval *interval;
851 int channels = hweight_long(mask);
853 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
854 interval->min = channels;
855 interval->max = channels;
858 int soc_dai_hw_params(struct snd_pcm_substream *substream,
859 struct snd_pcm_hw_params *params,
860 struct snd_soc_dai *dai)
862 struct snd_soc_pcm_runtime *rtd = substream->private_data;
865 /* perform any topology hw_params fixups before DAI */
866 if (rtd->dai_link->be_hw_params_fixup) {
867 ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
870 "ASoC: hw_params topology fixup failed %d\n",
876 if (dai->driver->ops->hw_params) {
877 ret = dai->driver->ops->hw_params(substream, params, dai);
879 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
888 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
889 struct snd_soc_component *last)
891 struct snd_soc_pcm_runtime *rtd = substream->private_data;
892 struct snd_soc_rtdcom_list *rtdcom;
893 struct snd_soc_component *component;
895 for_each_rtdcom(rtd, rtdcom) {
896 component = rtdcom->component;
898 if (component == last)
901 if (!component->driver->ops ||
902 !component->driver->ops->hw_free)
905 component->driver->ops->hw_free(substream);
912 * Called by ALSA when the hardware params are set by application. This
913 * function can also be called multiple times and can allocate buffers
914 * (using snd_pcm_lib_* ). It's non-atomic.
916 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
917 struct snd_pcm_hw_params *params)
919 struct snd_soc_pcm_runtime *rtd = substream->private_data;
920 struct snd_soc_component *component;
921 struct snd_soc_rtdcom_list *rtdcom;
922 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
925 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
926 if (rtd->dai_link->ops->hw_params) {
927 ret = rtd->dai_link->ops->hw_params(substream, params);
929 dev_err(rtd->card->dev, "ASoC: machine hw_params"
930 " failed: %d\n", ret);
935 for (i = 0; i < rtd->num_codecs; i++) {
936 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
937 struct snd_pcm_hw_params codec_params;
940 * Skip CODECs which don't support the current stream type,
941 * the idea being that if a CODEC is not used for the currently
942 * set up transfer direction, it should not need to be
943 * configured, especially since the configuration used might
944 * not even be supported by that CODEC. There may be cases
945 * however where a CODEC needs to be set up although it is
946 * actually not being used for the transfer, e.g. if a
947 * capture-only CODEC is acting as an LRCLK and/or BCLK master
948 * for the DAI link including a playback-only CODEC.
949 * If this becomes necessary, we will have to augment the
950 * machine driver setup with information on how to act, so
951 * we can do the right thing here.
953 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
956 /* copy params for each codec */
957 codec_params = *params;
959 /* fixup params based on TDM slot masks */
960 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
962 soc_pcm_codec_params_fixup(&codec_params,
965 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
967 soc_pcm_codec_params_fixup(&codec_params,
970 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
974 codec_dai->rate = params_rate(&codec_params);
975 codec_dai->channels = params_channels(&codec_params);
976 codec_dai->sample_bits = snd_pcm_format_physical_width(
977 params_format(&codec_params));
980 ret = soc_dai_hw_params(substream, params, cpu_dai);
984 for_each_rtdcom(rtd, rtdcom) {
985 component = rtdcom->component;
987 if (!component->driver->ops ||
988 !component->driver->ops->hw_params)
991 ret = component->driver->ops->hw_params(substream, params);
993 dev_err(component->dev,
994 "ASoC: %s hw params failed: %d\n",
995 component->name, ret);
1001 /* store the parameters for each DAIs */
1002 cpu_dai->rate = params_rate(params);
1003 cpu_dai->channels = params_channels(params);
1004 cpu_dai->sample_bits =
1005 snd_pcm_format_physical_width(params_format(params));
1007 ret = soc_pcm_params_symmetry(substream, params);
1011 mutex_unlock(&rtd->pcm_mutex);
1015 soc_pcm_components_hw_free(substream, component);
1017 if (cpu_dai->driver->ops->hw_free)
1018 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1021 i = rtd->num_codecs;
1025 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
1026 if (codec_dai->driver->ops->hw_free)
1027 codec_dai->driver->ops->hw_free(substream, codec_dai);
1028 codec_dai->rate = 0;
1031 if (rtd->dai_link->ops->hw_free)
1032 rtd->dai_link->ops->hw_free(substream);
1034 mutex_unlock(&rtd->pcm_mutex);
1039 * Frees resources allocated by hw_params, can be called multiple times
1041 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1043 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1044 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1045 struct snd_soc_dai *codec_dai;
1046 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1049 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1051 /* clear the corresponding DAIs parameters when going to be inactive */
1052 if (cpu_dai->active == 1) {
1054 cpu_dai->channels = 0;
1055 cpu_dai->sample_bits = 0;
1058 for (i = 0; i < rtd->num_codecs; i++) {
1059 codec_dai = rtd->codec_dais[i];
1060 if (codec_dai->active == 1) {
1061 codec_dai->rate = 0;
1062 codec_dai->channels = 0;
1063 codec_dai->sample_bits = 0;
1067 /* apply codec digital mute */
1068 for (i = 0; i < rtd->num_codecs; i++) {
1069 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
1070 (!playback && rtd->codec_dais[i]->capture_active == 1))
1071 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
1075 /* free any machine hw params */
1076 if (rtd->dai_link->ops->hw_free)
1077 rtd->dai_link->ops->hw_free(substream);
1079 /* free any component resources */
1080 soc_pcm_components_hw_free(substream, NULL);
1082 /* now free hw params for the DAIs */
1083 for (i = 0; i < rtd->num_codecs; i++) {
1084 codec_dai = rtd->codec_dais[i];
1085 if (codec_dai->driver->ops->hw_free)
1086 codec_dai->driver->ops->hw_free(substream, codec_dai);
1089 if (cpu_dai->driver->ops->hw_free)
1090 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1092 mutex_unlock(&rtd->pcm_mutex);
1096 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1098 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1099 struct snd_soc_component *component;
1100 struct snd_soc_rtdcom_list *rtdcom;
1101 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1102 struct snd_soc_dai *codec_dai;
1105 for (i = 0; i < rtd->num_codecs; i++) {
1106 codec_dai = rtd->codec_dais[i];
1107 if (codec_dai->driver->ops->trigger) {
1108 ret = codec_dai->driver->ops->trigger(substream,
1115 for_each_rtdcom(rtd, rtdcom) {
1116 component = rtdcom->component;
1118 if (!component->driver->ops ||
1119 !component->driver->ops->trigger)
1122 ret = component->driver->ops->trigger(substream, cmd);
1127 if (cpu_dai->driver->ops->trigger) {
1128 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1133 if (rtd->dai_link->ops->trigger) {
1134 ret = rtd->dai_link->ops->trigger(substream, cmd);
1142 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1145 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1146 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1147 struct snd_soc_dai *codec_dai;
1150 for (i = 0; i < rtd->num_codecs; i++) {
1151 codec_dai = rtd->codec_dais[i];
1152 if (codec_dai->driver->ops->bespoke_trigger) {
1153 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1160 if (cpu_dai->driver->ops->bespoke_trigger) {
1161 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1168 * soc level wrapper for pointer callback
1169 * If cpu_dai, codec_dai, component driver has the delay callback, then
1170 * the runtime->delay will be updated accordingly.
1172 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1174 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1175 struct snd_soc_component *component;
1176 struct snd_soc_rtdcom_list *rtdcom;
1177 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1178 struct snd_soc_dai *codec_dai;
1179 struct snd_pcm_runtime *runtime = substream->runtime;
1180 snd_pcm_uframes_t offset = 0;
1181 snd_pcm_sframes_t delay = 0;
1182 snd_pcm_sframes_t codec_delay = 0;
1185 /* clearing the previous total delay */
1188 for_each_rtdcom(rtd, rtdcom) {
1189 component = rtdcom->component;
1191 if (!component->driver->ops ||
1192 !component->driver->ops->pointer)
1195 /* FIXME: use 1st pointer */
1196 offset = component->driver->ops->pointer(substream);
1199 /* base delay if assigned in pointer callback */
1200 delay = runtime->delay;
1202 if (cpu_dai->driver->ops->delay)
1203 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1205 for (i = 0; i < rtd->num_codecs; i++) {
1206 codec_dai = rtd->codec_dais[i];
1207 if (codec_dai->driver->ops->delay)
1208 codec_delay = max(codec_delay,
1209 codec_dai->driver->ops->delay(substream,
1212 delay += codec_delay;
1214 runtime->delay = delay;
1219 /* connect a FE and BE */
1220 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1221 struct snd_soc_pcm_runtime *be, int stream)
1223 struct snd_soc_dpcm *dpcm;
1224 unsigned long flags;
1226 /* only add new dpcms */
1227 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1228 if (dpcm->be == be && dpcm->fe == fe)
1232 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1238 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1239 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1240 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1241 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1242 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1243 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1245 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1246 stream ? "capture" : "playback", fe->dai_link->name,
1247 stream ? "<-" : "->", be->dai_link->name);
1249 #ifdef CONFIG_DEBUG_FS
1250 if (fe->debugfs_dpcm_root)
1251 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1252 fe->debugfs_dpcm_root, &dpcm->state);
1257 /* reparent a BE onto another FE */
1258 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1259 struct snd_soc_pcm_runtime *be, int stream)
1261 struct snd_soc_dpcm *dpcm;
1262 struct snd_pcm_substream *fe_substream, *be_substream;
1264 /* reparent if BE is connected to other FEs */
1265 if (!be->dpcm[stream].users)
1268 be_substream = snd_soc_dpcm_get_substream(be, stream);
1270 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1274 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1275 stream ? "capture" : "playback",
1276 dpcm->fe->dai_link->name,
1277 stream ? "<-" : "->", dpcm->be->dai_link->name);
1279 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1280 be_substream->runtime = fe_substream->runtime;
1285 /* disconnect a BE and FE */
1286 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1288 struct snd_soc_dpcm *dpcm, *d;
1289 unsigned long flags;
1291 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1292 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1293 stream ? "capture" : "playback",
1294 dpcm->be->dai_link->name);
1296 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1299 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1300 stream ? "capture" : "playback", fe->dai_link->name,
1301 stream ? "<-" : "->", dpcm->be->dai_link->name);
1303 /* BEs still alive need new FE */
1304 dpcm_be_reparent(fe, dpcm->be, stream);
1306 #ifdef CONFIG_DEBUG_FS
1307 debugfs_remove(dpcm->debugfs_state);
1309 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1310 list_del(&dpcm->list_be);
1311 list_del(&dpcm->list_fe);
1312 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1317 /* get BE for DAI widget and stream */
1318 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1319 struct snd_soc_dapm_widget *widget, int stream)
1321 struct snd_soc_pcm_runtime *be;
1324 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1326 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1327 list_for_each_entry(be, &card->rtd_list, list) {
1329 if (!be->dai_link->no_pcm)
1332 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1333 be->cpu_dai->playback_widget ?
1334 be->cpu_dai->playback_widget->name : "(not set)");
1336 if (be->cpu_dai->playback_widget == widget)
1339 for (i = 0; i < be->num_codecs; i++) {
1340 struct snd_soc_dai *dai = be->codec_dais[i];
1341 if (dai->playback_widget == widget)
1347 list_for_each_entry(be, &card->rtd_list, list) {
1349 if (!be->dai_link->no_pcm)
1352 dev_dbg(card->dev, "ASoC: try BE %s\n",
1353 be->cpu_dai->capture_widget ?
1354 be->cpu_dai->capture_widget->name : "(not set)");
1356 if (be->cpu_dai->capture_widget == widget)
1359 for (i = 0; i < be->num_codecs; i++) {
1360 struct snd_soc_dai *dai = be->codec_dais[i];
1361 if (dai->capture_widget == widget)
1367 /* dai link name and stream name set correctly ? */
1368 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1369 stream ? "capture" : "playback", widget->name);
1373 static inline struct snd_soc_dapm_widget *
1374 dai_get_widget(struct snd_soc_dai *dai, int stream)
1376 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1377 return dai->playback_widget;
1379 return dai->capture_widget;
1382 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1383 struct snd_soc_dapm_widget *widget)
1387 for (i = 0; i < list->num_widgets; i++) {
1388 if (widget == list->widgets[i])
1395 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1396 enum snd_soc_dapm_direction dir)
1398 struct snd_soc_card *card = widget->dapm->card;
1399 struct snd_soc_pcm_runtime *rtd;
1402 if (dir == SND_SOC_DAPM_DIR_OUT) {
1403 list_for_each_entry(rtd, &card->rtd_list, list) {
1404 if (!rtd->dai_link->no_pcm)
1407 if (rtd->cpu_dai->playback_widget == widget)
1410 for (i = 0; i < rtd->num_codecs; ++i) {
1411 struct snd_soc_dai *dai = rtd->codec_dais[i];
1412 if (dai->playback_widget == widget)
1416 } else { /* SND_SOC_DAPM_DIR_IN */
1417 list_for_each_entry(rtd, &card->rtd_list, list) {
1418 if (!rtd->dai_link->no_pcm)
1421 if (rtd->cpu_dai->capture_widget == widget)
1424 for (i = 0; i < rtd->num_codecs; ++i) {
1425 struct snd_soc_dai *dai = rtd->codec_dais[i];
1426 if (dai->capture_widget == widget)
1435 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1436 int stream, struct snd_soc_dapm_widget_list **list)
1438 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1441 /* get number of valid DAI paths and their widgets */
1442 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1443 dpcm_end_walk_at_be);
1445 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1446 stream ? "capture" : "playback");
1451 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1452 struct snd_soc_dapm_widget_list **list_)
1454 struct snd_soc_dpcm *dpcm;
1455 struct snd_soc_dapm_widget_list *list = *list_;
1456 struct snd_soc_dapm_widget *widget;
1459 /* Destroy any old FE <--> BE connections */
1460 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1463 /* is there a valid CPU DAI widget for this BE */
1464 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1466 /* prune the BE if it's no longer in our active list */
1467 if (widget && widget_in_list(list, widget))
1470 /* is there a valid CODEC DAI widget for this BE */
1471 for (i = 0; i < dpcm->be->num_codecs; i++) {
1472 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1473 widget = dai_get_widget(dai, stream);
1475 /* prune the BE if it's no longer in our active list */
1476 if (widget && widget_in_list(list, widget))
1480 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1481 stream ? "capture" : "playback",
1482 dpcm->be->dai_link->name, fe->dai_link->name);
1483 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1484 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1488 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1492 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1493 struct snd_soc_dapm_widget_list **list_)
1495 struct snd_soc_card *card = fe->card;
1496 struct snd_soc_dapm_widget_list *list = *list_;
1497 struct snd_soc_pcm_runtime *be;
1498 int i, new = 0, err;
1500 /* Create any new FE <--> BE connections */
1501 for (i = 0; i < list->num_widgets; i++) {
1503 switch (list->widgets[i]->id) {
1504 case snd_soc_dapm_dai_in:
1505 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1508 case snd_soc_dapm_dai_out:
1509 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1516 /* is there a valid BE rtd for this widget */
1517 be = dpcm_get_be(card, list->widgets[i], stream);
1519 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1520 list->widgets[i]->name);
1524 /* make sure BE is a real BE */
1525 if (!be->dai_link->no_pcm)
1528 /* don't connect if FE is not running */
1529 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1532 /* newly connected FE and BE */
1533 err = dpcm_be_connect(fe, be, stream);
1535 dev_err(fe->dev, "ASoC: can't connect %s\n",
1536 list->widgets[i]->name);
1538 } else if (err == 0) /* already connected */
1542 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1546 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1551 * Find the corresponding BE DAIs that source or sink audio to this
1554 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1555 int stream, struct snd_soc_dapm_widget_list **list, int new)
1558 return dpcm_add_paths(fe, stream, list);
1560 return dpcm_prune_paths(fe, stream, list);
1563 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1565 struct snd_soc_dpcm *dpcm;
1566 unsigned long flags;
1568 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1569 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1570 dpcm->be->dpcm[stream].runtime_update =
1571 SND_SOC_DPCM_UPDATE_NO;
1572 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1575 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1578 struct snd_soc_dpcm *dpcm;
1580 /* disable any enabled and non active backends */
1581 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1583 struct snd_soc_pcm_runtime *be = dpcm->be;
1584 struct snd_pcm_substream *be_substream =
1585 snd_soc_dpcm_get_substream(be, stream);
1587 if (be->dpcm[stream].users == 0)
1588 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1589 stream ? "capture" : "playback",
1590 be->dpcm[stream].state);
1592 if (--be->dpcm[stream].users != 0)
1595 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1598 soc_pcm_close(be_substream);
1599 be_substream->runtime = NULL;
1600 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1604 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1606 struct snd_soc_dpcm *dpcm;
1609 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1610 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1612 struct snd_soc_pcm_runtime *be = dpcm->be;
1613 struct snd_pcm_substream *be_substream =
1614 snd_soc_dpcm_get_substream(be, stream);
1616 if (!be_substream) {
1617 dev_err(be->dev, "ASoC: no backend %s stream\n",
1618 stream ? "capture" : "playback");
1622 /* is this op for this BE ? */
1623 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1626 /* first time the dpcm is open ? */
1627 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1628 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1629 stream ? "capture" : "playback",
1630 be->dpcm[stream].state);
1632 if (be->dpcm[stream].users++ != 0)
1635 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1636 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1639 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1640 stream ? "capture" : "playback", be->dai_link->name);
1642 be_substream->runtime = be->dpcm[stream].runtime;
1643 err = soc_pcm_open(be_substream);
1645 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1646 be->dpcm[stream].users--;
1647 if (be->dpcm[stream].users < 0)
1648 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1649 stream ? "capture" : "playback",
1650 be->dpcm[stream].state);
1652 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1656 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1663 /* disable any enabled and non active backends */
1664 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1665 struct snd_soc_pcm_runtime *be = dpcm->be;
1666 struct snd_pcm_substream *be_substream =
1667 snd_soc_dpcm_get_substream(be, stream);
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 %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_OPEN)
1683 soc_pcm_close(be_substream);
1684 be_substream->runtime = NULL;
1685 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1691 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1692 struct snd_soc_pcm_stream *stream)
1694 runtime->hw.rate_min = stream->rate_min;
1695 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1696 runtime->hw.channels_min = stream->channels_min;
1697 runtime->hw.channels_max = stream->channels_max;
1698 if (runtime->hw.formats)
1699 runtime->hw.formats &= stream->formats;
1701 runtime->hw.formats = stream->formats;
1702 runtime->hw.rates = stream->rates;
1705 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1708 struct snd_soc_pcm_runtime *fe = substream->private_data;
1709 struct snd_soc_dpcm *dpcm;
1710 int stream = substream->stream;
1712 if (!fe->dai_link->dpcm_merged_format)
1716 * It returns merged BE codec format
1717 * if FE want to use it (= dpcm_merged_format)
1720 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1721 struct snd_soc_pcm_runtime *be = dpcm->be;
1722 struct snd_soc_dai_driver *codec_dai_drv;
1723 struct snd_soc_pcm_stream *codec_stream;
1726 for (i = 0; i < be->num_codecs; i++) {
1728 * Skip CODECs which don't support the current stream
1729 * type. See soc_pcm_init_runtime_hw() for more details
1731 if (!snd_soc_dai_stream_valid(be->codec_dais[i],
1735 codec_dai_drv = be->codec_dais[i]->driver;
1736 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1737 codec_stream = &codec_dai_drv->playback;
1739 codec_stream = &codec_dai_drv->capture;
1741 *formats &= codec_stream->formats;
1746 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1747 unsigned int *channels_min,
1748 unsigned int *channels_max)
1750 struct snd_soc_pcm_runtime *fe = substream->private_data;
1751 struct snd_soc_dpcm *dpcm;
1752 int stream = substream->stream;
1754 if (!fe->dai_link->dpcm_merged_chan)
1758 * It returns merged BE codec channel;
1759 * if FE want to use it (= dpcm_merged_chan)
1762 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1763 struct snd_soc_pcm_runtime *be = dpcm->be;
1764 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1765 struct snd_soc_dai_driver *codec_dai_drv;
1766 struct snd_soc_pcm_stream *codec_stream;
1767 struct snd_soc_pcm_stream *cpu_stream;
1769 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1770 cpu_stream = &cpu_dai_drv->playback;
1772 cpu_stream = &cpu_dai_drv->capture;
1774 *channels_min = max(*channels_min, cpu_stream->channels_min);
1775 *channels_max = min(*channels_max, cpu_stream->channels_max);
1778 * chan min/max cannot be enforced if there are multiple CODEC
1779 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1781 if (be->num_codecs == 1) {
1782 codec_dai_drv = be->codec_dais[0]->driver;
1784 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1785 codec_stream = &codec_dai_drv->playback;
1787 codec_stream = &codec_dai_drv->capture;
1789 *channels_min = max(*channels_min,
1790 codec_stream->channels_min);
1791 *channels_max = min(*channels_max,
1792 codec_stream->channels_max);
1797 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1798 unsigned int *rates,
1799 unsigned int *rate_min,
1800 unsigned int *rate_max)
1802 struct snd_soc_pcm_runtime *fe = substream->private_data;
1803 struct snd_soc_dpcm *dpcm;
1804 int stream = substream->stream;
1806 if (!fe->dai_link->dpcm_merged_rate)
1810 * It returns merged BE codec channel;
1811 * if FE want to use it (= dpcm_merged_chan)
1814 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1815 struct snd_soc_pcm_runtime *be = dpcm->be;
1816 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1817 struct snd_soc_dai_driver *codec_dai_drv;
1818 struct snd_soc_pcm_stream *codec_stream;
1819 struct snd_soc_pcm_stream *cpu_stream;
1822 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1823 cpu_stream = &cpu_dai_drv->playback;
1825 cpu_stream = &cpu_dai_drv->capture;
1827 *rate_min = max(*rate_min, cpu_stream->rate_min);
1828 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1829 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1831 for (i = 0; i < be->num_codecs; i++) {
1833 * Skip CODECs which don't support the current stream
1834 * type. See soc_pcm_init_runtime_hw() for more details
1836 if (!snd_soc_dai_stream_valid(be->codec_dais[i],
1840 codec_dai_drv = be->codec_dais[i]->driver;
1841 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1842 codec_stream = &codec_dai_drv->playback;
1844 codec_stream = &codec_dai_drv->capture;
1846 *rate_min = max(*rate_min, codec_stream->rate_min);
1847 *rate_max = min_not_zero(*rate_max,
1848 codec_stream->rate_max);
1849 *rates = snd_pcm_rate_mask_intersect(*rates,
1850 codec_stream->rates);
1855 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1857 struct snd_pcm_runtime *runtime = substream->runtime;
1858 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1859 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1860 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1862 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1863 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1865 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1867 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1868 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1869 &runtime->hw.channels_max);
1870 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1871 &runtime->hw.rate_min, &runtime->hw.rate_max);
1874 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1876 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1877 * for avoiding the race with trigger callback.
1878 * If the state is unset and a trigger is pending while the previous operation,
1879 * process the pending trigger action here.
1881 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1882 int stream, enum snd_soc_dpcm_update state)
1884 struct snd_pcm_substream *substream =
1885 snd_soc_dpcm_get_substream(fe, stream);
1887 snd_pcm_stream_lock_irq(substream);
1888 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1889 dpcm_fe_dai_do_trigger(substream,
1890 fe->dpcm[stream].trigger_pending - 1);
1891 fe->dpcm[stream].trigger_pending = 0;
1893 fe->dpcm[stream].runtime_update = state;
1894 snd_pcm_stream_unlock_irq(substream);
1897 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1900 struct snd_soc_dpcm *dpcm;
1901 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1902 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1905 /* apply symmetry for FE */
1906 if (soc_pcm_has_symmetry(fe_substream))
1907 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1909 /* Symmetry only applies if we've got an active stream. */
1910 if (fe_cpu_dai->active) {
1911 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1916 /* apply symmetry for BE */
1917 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1918 struct snd_soc_pcm_runtime *be = dpcm->be;
1919 struct snd_pcm_substream *be_substream =
1920 snd_soc_dpcm_get_substream(be, stream);
1921 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1924 if (rtd->dai_link->be_hw_params_fixup)
1927 if (soc_pcm_has_symmetry(be_substream))
1928 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1930 /* Symmetry only applies if we've got an active stream. */
1931 if (rtd->cpu_dai->active) {
1932 err = soc_pcm_apply_symmetry(fe_substream,
1938 for (i = 0; i < rtd->num_codecs; i++) {
1939 if (rtd->codec_dais[i]->active) {
1940 err = soc_pcm_apply_symmetry(fe_substream,
1941 rtd->codec_dais[i]);
1951 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1953 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1954 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1955 int stream = fe_substream->stream, ret = 0;
1957 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1959 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1961 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1965 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1967 /* start the DAI frontend */
1968 ret = soc_pcm_open(fe_substream);
1970 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1974 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1976 dpcm_set_fe_runtime(fe_substream);
1977 snd_pcm_limit_hw_rates(runtime);
1979 ret = dpcm_apply_symmetry(fe_substream, stream);
1981 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1986 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1990 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1992 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1996 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1998 struct snd_soc_dpcm *dpcm;
2000 /* only shutdown BEs that are either sinks or sources to this FE DAI */
2001 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2003 struct snd_soc_pcm_runtime *be = dpcm->be;
2004 struct snd_pcm_substream *be_substream =
2005 snd_soc_dpcm_get_substream(be, stream);
2007 /* is this op for this BE ? */
2008 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2011 if (be->dpcm[stream].users == 0)
2012 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2013 stream ? "capture" : "playback",
2014 be->dpcm[stream].state);
2016 if (--be->dpcm[stream].users != 0)
2019 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2020 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2021 soc_pcm_hw_free(be_substream);
2022 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2025 dev_dbg(be->dev, "ASoC: close BE %s\n",
2026 be->dai_link->name);
2028 soc_pcm_close(be_substream);
2029 be_substream->runtime = NULL;
2031 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2036 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2038 struct snd_soc_pcm_runtime *fe = substream->private_data;
2039 int stream = substream->stream;
2041 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2043 /* shutdown the BEs */
2044 dpcm_be_dai_shutdown(fe, substream->stream);
2046 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2048 /* now shutdown the frontend */
2049 soc_pcm_close(substream);
2051 /* run the stream event for each BE */
2052 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2054 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2055 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2059 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2061 struct snd_soc_dpcm *dpcm;
2063 /* only hw_params backends that are either sinks or sources
2064 * to this frontend DAI */
2065 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2067 struct snd_soc_pcm_runtime *be = dpcm->be;
2068 struct snd_pcm_substream *be_substream =
2069 snd_soc_dpcm_get_substream(be, stream);
2071 /* is this op for this BE ? */
2072 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2075 /* only free hw when no longer used - check all FEs */
2076 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2079 /* do not free hw if this BE is used by other FE */
2080 if (be->dpcm[stream].users > 1)
2083 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2084 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2085 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2086 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2087 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2088 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2091 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2092 be->dai_link->name);
2094 soc_pcm_hw_free(be_substream);
2096 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2102 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2104 struct snd_soc_pcm_runtime *fe = substream->private_data;
2105 int err, stream = substream->stream;
2107 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2108 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2110 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2112 /* call hw_free on the frontend */
2113 err = soc_pcm_hw_free(substream);
2115 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2116 fe->dai_link->name);
2118 /* only hw_params backends that are either sinks or sources
2119 * to this frontend DAI */
2120 err = dpcm_be_dai_hw_free(fe, stream);
2122 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2123 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2125 mutex_unlock(&fe->card->mutex);
2129 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2131 struct snd_soc_dpcm *dpcm;
2134 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2136 struct snd_soc_pcm_runtime *be = dpcm->be;
2137 struct snd_pcm_substream *be_substream =
2138 snd_soc_dpcm_get_substream(be, stream);
2140 /* is this op for this BE ? */
2141 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2144 /* copy params for each dpcm */
2145 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2146 sizeof(struct snd_pcm_hw_params));
2148 /* perform any hw_params fixups */
2149 if (be->dai_link->be_hw_params_fixup) {
2150 ret = be->dai_link->be_hw_params_fixup(be,
2154 "ASoC: hw_params BE fixup failed %d\n",
2160 /* only allow hw_params() if no connected FEs are running */
2161 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2164 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2165 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2166 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2169 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2170 be->dai_link->name);
2172 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2174 dev_err(dpcm->be->dev,
2175 "ASoC: hw_params BE failed %d\n", ret);
2179 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2184 /* disable any enabled and non active backends */
2185 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2186 struct snd_soc_pcm_runtime *be = dpcm->be;
2187 struct snd_pcm_substream *be_substream =
2188 snd_soc_dpcm_get_substream(be, stream);
2190 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2193 /* only allow hw_free() if no connected FEs are running */
2194 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2197 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2198 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2199 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2200 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2203 soc_pcm_hw_free(be_substream);
2209 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2210 struct snd_pcm_hw_params *params)
2212 struct snd_soc_pcm_runtime *fe = substream->private_data;
2213 int ret, stream = substream->stream;
2215 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2216 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2218 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2219 sizeof(struct snd_pcm_hw_params));
2220 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2222 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2226 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2227 fe->dai_link->name, params_rate(params),
2228 params_channels(params), params_format(params));
2230 /* call hw_params on the frontend */
2231 ret = soc_pcm_hw_params(substream, params);
2233 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2234 dpcm_be_dai_hw_free(fe, stream);
2236 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2239 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2240 mutex_unlock(&fe->card->mutex);
2244 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2245 struct snd_pcm_substream *substream, int cmd)
2249 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2250 dpcm->be->dai_link->name, cmd);
2252 ret = soc_pcm_trigger(substream, cmd);
2254 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2259 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2262 struct snd_soc_dpcm *dpcm;
2265 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2267 struct snd_soc_pcm_runtime *be = dpcm->be;
2268 struct snd_pcm_substream *be_substream =
2269 snd_soc_dpcm_get_substream(be, stream);
2271 /* is this op for this BE ? */
2272 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2276 case SNDRV_PCM_TRIGGER_START:
2277 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2278 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2279 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2282 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2286 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2288 case SNDRV_PCM_TRIGGER_RESUME:
2289 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2292 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2296 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2298 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2299 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2302 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2306 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2308 case SNDRV_PCM_TRIGGER_STOP:
2309 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2310 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2313 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2316 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2320 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2322 case SNDRV_PCM_TRIGGER_SUSPEND:
2323 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2326 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2329 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2333 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2335 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2336 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2339 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2342 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2346 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2353 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2355 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2356 int cmd, bool fe_first)
2358 struct snd_soc_pcm_runtime *fe = substream->private_data;
2361 /* call trigger on the frontend before the backend. */
2363 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2364 fe->dai_link->name, cmd);
2366 ret = soc_pcm_trigger(substream, cmd);
2370 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2374 /* call trigger on the frontend after the backend. */
2375 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2379 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2380 fe->dai_link->name, cmd);
2382 ret = soc_pcm_trigger(substream, cmd);
2387 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2389 struct snd_soc_pcm_runtime *fe = substream->private_data;
2390 int stream = substream->stream;
2392 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2394 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2397 case SND_SOC_DPCM_TRIGGER_PRE:
2399 case SNDRV_PCM_TRIGGER_START:
2400 case SNDRV_PCM_TRIGGER_RESUME:
2401 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2402 case SNDRV_PCM_TRIGGER_DRAIN:
2403 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2405 case SNDRV_PCM_TRIGGER_STOP:
2406 case SNDRV_PCM_TRIGGER_SUSPEND:
2407 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2408 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2415 case SND_SOC_DPCM_TRIGGER_POST:
2417 case SNDRV_PCM_TRIGGER_START:
2418 case SNDRV_PCM_TRIGGER_RESUME:
2419 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2420 case SNDRV_PCM_TRIGGER_DRAIN:
2421 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2423 case SNDRV_PCM_TRIGGER_STOP:
2424 case SNDRV_PCM_TRIGGER_SUSPEND:
2425 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2426 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2433 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2434 /* bespoke trigger() - handles both FE and BEs */
2436 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2437 fe->dai_link->name, cmd);
2439 ret = soc_pcm_bespoke_trigger(substream, cmd);
2442 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2443 fe->dai_link->name);
2449 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2455 case SNDRV_PCM_TRIGGER_START:
2456 case SNDRV_PCM_TRIGGER_RESUME:
2457 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2458 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2460 case SNDRV_PCM_TRIGGER_STOP:
2461 case SNDRV_PCM_TRIGGER_SUSPEND:
2462 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2464 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2465 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2470 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2474 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2476 struct snd_soc_pcm_runtime *fe = substream->private_data;
2477 int stream = substream->stream;
2479 /* if FE's runtime_update is already set, we're in race;
2480 * process this trigger later at exit
2482 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2483 fe->dpcm[stream].trigger_pending = cmd + 1;
2484 return 0; /* delayed, assuming it's successful */
2487 /* we're alone, let's trigger */
2488 return dpcm_fe_dai_do_trigger(substream, cmd);
2491 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2493 struct snd_soc_dpcm *dpcm;
2496 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2498 struct snd_soc_pcm_runtime *be = dpcm->be;
2499 struct snd_pcm_substream *be_substream =
2500 snd_soc_dpcm_get_substream(be, stream);
2502 /* is this op for this BE ? */
2503 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2506 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2507 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2508 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2509 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2512 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2513 be->dai_link->name);
2515 ret = soc_pcm_prepare(be_substream);
2517 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2522 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2527 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2529 struct snd_soc_pcm_runtime *fe = substream->private_data;
2530 int stream = substream->stream, ret = 0;
2532 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2534 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2536 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2538 /* there is no point preparing this FE if there are no BEs */
2539 if (list_empty(&fe->dpcm[stream].be_clients)) {
2540 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2541 fe->dai_link->name);
2546 ret = dpcm_be_dai_prepare(fe, substream->stream);
2550 /* call prepare on the frontend */
2551 ret = soc_pcm_prepare(substream);
2553 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2554 fe->dai_link->name);
2558 /* run the stream event for each BE */
2559 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2560 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2563 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2564 mutex_unlock(&fe->card->mutex);
2569 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2570 unsigned int cmd, void *arg)
2572 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2573 struct snd_soc_component *component;
2574 struct snd_soc_rtdcom_list *rtdcom;
2576 for_each_rtdcom(rtd, rtdcom) {
2577 component = rtdcom->component;
2579 if (!component->driver->ops ||
2580 !component->driver->ops->ioctl)
2583 /* FIXME: use 1st ioctl */
2584 return component->driver->ops->ioctl(substream, cmd, arg);
2587 return snd_pcm_lib_ioctl(substream, cmd, arg);
2590 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2592 struct snd_pcm_substream *substream =
2593 snd_soc_dpcm_get_substream(fe, stream);
2594 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2597 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2598 stream ? "capture" : "playback", fe->dai_link->name);
2600 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2601 /* call bespoke trigger - FE takes care of all BE triggers */
2602 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2603 fe->dai_link->name);
2605 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2607 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2609 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2610 fe->dai_link->name);
2612 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2614 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2617 err = dpcm_be_dai_hw_free(fe, stream);
2619 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2621 err = dpcm_be_dai_shutdown(fe, stream);
2623 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2625 /* run the stream event for each BE */
2626 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2631 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2633 struct snd_pcm_substream *substream =
2634 snd_soc_dpcm_get_substream(fe, stream);
2635 struct snd_soc_dpcm *dpcm;
2636 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2638 unsigned long flags;
2640 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2641 stream ? "capture" : "playback", fe->dai_link->name);
2643 /* Only start the BE if the FE is ready */
2644 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2645 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2648 /* startup must always be called for new BEs */
2649 ret = dpcm_be_dai_startup(fe, stream);
2653 /* keep going if FE state is > open */
2654 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2657 ret = dpcm_be_dai_hw_params(fe, stream);
2661 /* keep going if FE state is > hw_params */
2662 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2666 ret = dpcm_be_dai_prepare(fe, stream);
2670 /* run the stream event for each BE */
2671 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2673 /* keep going if FE state is > prepare */
2674 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2675 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2678 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2679 /* call trigger on the frontend - FE takes care of all BE triggers */
2680 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2681 fe->dai_link->name);
2683 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2685 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2689 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2690 fe->dai_link->name);
2692 ret = dpcm_be_dai_trigger(fe, stream,
2693 SNDRV_PCM_TRIGGER_START);
2695 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2703 dpcm_be_dai_hw_free(fe, stream);
2705 dpcm_be_dai_shutdown(fe, stream);
2707 /* disconnect any non started BEs */
2708 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2709 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2710 struct snd_soc_pcm_runtime *be = dpcm->be;
2711 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2712 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2714 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2719 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2723 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2724 ret = dpcm_run_update_startup(fe, stream);
2726 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2727 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2732 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2736 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2737 ret = dpcm_run_update_shutdown(fe, stream);
2739 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2740 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2745 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2747 struct snd_soc_dapm_widget_list *list;
2750 if (!fe->dai_link->dynamic)
2753 /* only check active links */
2754 if (!fe->cpu_dai->active)
2757 /* DAPM sync will call this to update DSP paths */
2758 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2759 new ? "new" : "old", fe->dai_link->name);
2761 /* skip if FE doesn't have playback capability */
2762 if (!fe->cpu_dai->driver->playback.channels_min ||
2763 !fe->codec_dai->driver->playback.channels_min)
2766 /* skip if FE isn't currently playing */
2767 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2770 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2772 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2773 fe->dai_link->name, "playback");
2777 /* update any playback paths */
2778 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2781 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2783 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2785 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2786 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2789 dpcm_path_put(&list);
2792 /* skip if FE doesn't have capture capability */
2793 if (!fe->cpu_dai->driver->capture.channels_min ||
2794 !fe->codec_dai->driver->capture.channels_min)
2797 /* skip if FE isn't currently capturing */
2798 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2801 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2803 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2804 fe->dai_link->name, "capture");
2808 /* update any old capture paths */
2809 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2812 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2814 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2816 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2817 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2820 dpcm_path_put(&list);
2825 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2828 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2830 struct snd_soc_pcm_runtime *fe;
2833 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2834 /* shutdown all old paths first */
2835 list_for_each_entry(fe, &card->rtd_list, list) {
2836 ret = soc_dpcm_fe_runtime_update(fe, 0);
2841 /* bring new paths up */
2842 list_for_each_entry(fe, &card->rtd_list, list) {
2843 ret = soc_dpcm_fe_runtime_update(fe, 1);
2849 mutex_unlock(&card->mutex);
2852 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2854 struct snd_soc_dpcm *dpcm;
2855 struct list_head *clients =
2856 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2858 list_for_each_entry(dpcm, clients, list_be) {
2860 struct snd_soc_pcm_runtime *be = dpcm->be;
2863 if (be->dai_link->ignore_suspend)
2866 for (i = 0; i < be->num_codecs; i++) {
2867 struct snd_soc_dai *dai = be->codec_dais[i];
2868 struct snd_soc_dai_driver *drv = dai->driver;
2870 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2871 be->dai_link->name);
2873 if (drv->ops && drv->ops->digital_mute &&
2874 dai->playback_active)
2875 drv->ops->digital_mute(dai, mute);
2882 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2884 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2885 struct snd_soc_dpcm *dpcm;
2886 struct snd_soc_dapm_widget_list *list;
2888 int stream = fe_substream->stream;
2890 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2891 fe->dpcm[stream].runtime = fe_substream->runtime;
2893 ret = dpcm_path_get(fe, stream, &list);
2895 mutex_unlock(&fe->card->mutex);
2897 } else if (ret == 0) {
2898 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2899 fe->dai_link->name, stream ? "capture" : "playback");
2902 /* calculate valid and active FE <-> BE dpcms */
2903 dpcm_process_paths(fe, stream, &list, 1);
2905 ret = dpcm_fe_dai_startup(fe_substream);
2907 /* clean up all links */
2908 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2909 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2911 dpcm_be_disconnect(fe, stream);
2912 fe->dpcm[stream].runtime = NULL;
2915 dpcm_clear_pending_state(fe, stream);
2916 dpcm_path_put(&list);
2917 mutex_unlock(&fe->card->mutex);
2921 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2923 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2924 struct snd_soc_dpcm *dpcm;
2925 int stream = fe_substream->stream, ret;
2927 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2928 ret = dpcm_fe_dai_shutdown(fe_substream);
2930 /* mark FE's links ready to prune */
2931 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2932 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2934 dpcm_be_disconnect(fe, stream);
2936 fe->dpcm[stream].runtime = NULL;
2937 mutex_unlock(&fe->card->mutex);
2941 static void soc_pcm_private_free(struct snd_pcm *pcm)
2943 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2944 struct snd_soc_rtdcom_list *rtdcom;
2945 struct snd_soc_component *component;
2947 /* need to sync the delayed work before releasing resources */
2948 flush_delayed_work(&rtd->delayed_work);
2949 for_each_rtdcom(rtd, rtdcom) {
2950 component = rtdcom->component;
2952 if (component->driver->pcm_free)
2953 component->driver->pcm_free(pcm);
2957 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2959 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2960 struct snd_soc_rtdcom_list *rtdcom;
2961 struct snd_soc_component *component;
2963 for_each_rtdcom(rtd, rtdcom) {
2964 component = rtdcom->component;
2966 if (!component->driver->ops ||
2967 !component->driver->ops->ack)
2970 /* FIXME. it returns 1st ask now */
2971 return component->driver->ops->ack(substream);
2977 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2978 unsigned long pos, void __user *buf,
2979 unsigned long bytes)
2981 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2982 struct snd_soc_rtdcom_list *rtdcom;
2983 struct snd_soc_component *component;
2985 for_each_rtdcom(rtd, rtdcom) {
2986 component = rtdcom->component;
2988 if (!component->driver->ops ||
2989 !component->driver->ops->copy_user)
2992 /* FIXME. it returns 1st copy now */
2993 return component->driver->ops->copy_user(substream, channel,
3000 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
3001 unsigned long pos, void *buf, unsigned long bytes)
3003 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3004 struct snd_soc_rtdcom_list *rtdcom;
3005 struct snd_soc_component *component;
3007 for_each_rtdcom(rtd, rtdcom) {
3008 component = rtdcom->component;
3010 if (!component->driver->ops ||
3011 !component->driver->ops->copy_kernel)
3014 /* FIXME. it returns 1st copy now */
3015 return component->driver->ops->copy_kernel(substream, channel,
3022 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
3023 unsigned long pos, unsigned long bytes)
3025 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3026 struct snd_soc_rtdcom_list *rtdcom;
3027 struct snd_soc_component *component;
3029 for_each_rtdcom(rtd, rtdcom) {
3030 component = rtdcom->component;
3032 if (!component->driver->ops ||
3033 !component->driver->ops->fill_silence)
3036 /* FIXME. it returns 1st silence now */
3037 return component->driver->ops->fill_silence(substream, channel,
3044 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
3045 unsigned long offset)
3047 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3048 struct snd_soc_rtdcom_list *rtdcom;
3049 struct snd_soc_component *component;
3052 for_each_rtdcom(rtd, rtdcom) {
3053 component = rtdcom->component;
3055 if (!component->driver->ops ||
3056 !component->driver->ops->page)
3059 /* FIXME. it returns 1st page now */
3060 page = component->driver->ops->page(substream, offset);
3068 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3069 struct vm_area_struct *vma)
3071 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3072 struct snd_soc_rtdcom_list *rtdcom;
3073 struct snd_soc_component *component;
3075 for_each_rtdcom(rtd, rtdcom) {
3076 component = rtdcom->component;
3078 if (!component->driver->ops ||
3079 !component->driver->ops->mmap)
3082 /* FIXME. it returns 1st mmap now */
3083 return component->driver->ops->mmap(substream, vma);
3089 /* create a new pcm */
3090 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3092 struct snd_soc_dai *codec_dai;
3093 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3094 struct snd_soc_component *component;
3095 struct snd_soc_rtdcom_list *rtdcom;
3096 struct snd_pcm *pcm;
3098 int ret = 0, playback = 0, capture = 0;
3101 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3102 playback = rtd->dai_link->dpcm_playback;
3103 capture = rtd->dai_link->dpcm_capture;
3105 for (i = 0; i < rtd->num_codecs; i++) {
3106 codec_dai = rtd->codec_dais[i];
3107 if (codec_dai->driver->playback.channels_min)
3109 if (codec_dai->driver->capture.channels_min)
3113 capture = capture && cpu_dai->driver->capture.channels_min;
3114 playback = playback && cpu_dai->driver->playback.channels_min;
3117 if (rtd->dai_link->playback_only) {
3122 if (rtd->dai_link->capture_only) {
3127 /* create the PCM */
3128 if (rtd->dai_link->no_pcm) {
3129 snprintf(new_name, sizeof(new_name), "(%s)",
3130 rtd->dai_link->stream_name);
3132 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3133 playback, capture, &pcm);
3135 if (rtd->dai_link->dynamic)
3136 snprintf(new_name, sizeof(new_name), "%s (*)",
3137 rtd->dai_link->stream_name);
3139 snprintf(new_name, sizeof(new_name), "%s %s-%d",
3140 rtd->dai_link->stream_name,
3141 (rtd->num_codecs > 1) ?
3142 "multicodec" : rtd->codec_dai->name, num);
3144 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3148 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3149 rtd->dai_link->name);
3152 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3154 /* DAPM dai link stream work */
3155 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3157 pcm->nonatomic = rtd->dai_link->nonatomic;
3159 pcm->private_data = rtd;
3161 if (rtd->dai_link->no_pcm) {
3163 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3165 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3169 /* ASoC PCM operations */
3170 if (rtd->dai_link->dynamic) {
3171 rtd->ops.open = dpcm_fe_dai_open;
3172 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
3173 rtd->ops.prepare = dpcm_fe_dai_prepare;
3174 rtd->ops.trigger = dpcm_fe_dai_trigger;
3175 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3176 rtd->ops.close = dpcm_fe_dai_close;
3177 rtd->ops.pointer = soc_pcm_pointer;
3178 rtd->ops.ioctl = soc_pcm_ioctl;
3180 rtd->ops.open = soc_pcm_open;
3181 rtd->ops.hw_params = soc_pcm_hw_params;
3182 rtd->ops.prepare = soc_pcm_prepare;
3183 rtd->ops.trigger = soc_pcm_trigger;
3184 rtd->ops.hw_free = soc_pcm_hw_free;
3185 rtd->ops.close = soc_pcm_close;
3186 rtd->ops.pointer = soc_pcm_pointer;
3187 rtd->ops.ioctl = soc_pcm_ioctl;
3190 for_each_rtdcom(rtd, rtdcom) {
3191 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3197 rtd->ops.ack = soc_rtdcom_ack;
3199 rtd->ops.copy_user = soc_rtdcom_copy_user;
3200 if (ops->copy_kernel)
3201 rtd->ops.copy_kernel = soc_rtdcom_copy_kernel;
3202 if (ops->fill_silence)
3203 rtd->ops.fill_silence = soc_rtdcom_fill_silence;
3205 rtd->ops.page = soc_rtdcom_page;
3207 rtd->ops.mmap = soc_rtdcom_mmap;
3211 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3214 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3216 for_each_rtdcom(rtd, rtdcom) {
3217 component = rtdcom->component;
3219 if (!component->driver->pcm_new)
3222 ret = component->driver->pcm_new(rtd);
3224 dev_err(component->dev,
3225 "ASoC: pcm constructor failed: %d\n",
3231 pcm->private_free = soc_pcm_private_free;
3233 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3234 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3239 /* is the current PCM operation for this FE ? */
3240 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3242 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3246 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3248 /* is the current PCM operation for this BE ? */
3249 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3250 struct snd_soc_pcm_runtime *be, int stream)
3252 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3253 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3254 be->dpcm[stream].runtime_update))
3258 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3260 /* get the substream for this BE */
3261 struct snd_pcm_substream *
3262 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3264 return be->pcm->streams[stream].substream;
3266 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3268 /* get the BE runtime state */
3269 enum snd_soc_dpcm_state
3270 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3272 return be->dpcm[stream].state;
3274 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3276 /* set the BE runtime state */
3277 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3278 int stream, enum snd_soc_dpcm_state state)
3280 be->dpcm[stream].state = state;
3282 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3285 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3286 * are not running, paused or suspended for the specified stream direction.
3288 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3289 struct snd_soc_pcm_runtime *be, int stream)
3291 struct snd_soc_dpcm *dpcm;
3294 unsigned long flags;
3296 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3297 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3302 state = dpcm->fe->dpcm[stream].state;
3303 if (state == SND_SOC_DPCM_STATE_START ||
3304 state == SND_SOC_DPCM_STATE_PAUSED ||
3305 state == SND_SOC_DPCM_STATE_SUSPEND) {
3310 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3312 /* it's safe to free/stop this BE DAI */
3315 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3318 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3319 * running, paused or suspended for the specified stream direction.
3321 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3322 struct snd_soc_pcm_runtime *be, int stream)
3324 struct snd_soc_dpcm *dpcm;
3327 unsigned long flags;
3329 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3330 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3335 state = dpcm->fe->dpcm[stream].state;
3336 if (state == SND_SOC_DPCM_STATE_START ||
3337 state == SND_SOC_DPCM_STATE_PAUSED ||
3338 state == SND_SOC_DPCM_STATE_SUSPEND ||
3339 state == SND_SOC_DPCM_STATE_PREPARE) {
3344 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3346 /* it's safe to change hw_params */
3349 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3351 #ifdef CONFIG_DEBUG_FS
3352 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3355 case SND_SOC_DPCM_STATE_NEW:
3357 case SND_SOC_DPCM_STATE_OPEN:
3359 case SND_SOC_DPCM_STATE_HW_PARAMS:
3361 case SND_SOC_DPCM_STATE_PREPARE:
3363 case SND_SOC_DPCM_STATE_START:
3365 case SND_SOC_DPCM_STATE_STOP:
3367 case SND_SOC_DPCM_STATE_SUSPEND:
3369 case SND_SOC_DPCM_STATE_PAUSED:
3371 case SND_SOC_DPCM_STATE_HW_FREE:
3373 case SND_SOC_DPCM_STATE_CLOSE:
3380 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3381 int stream, char *buf, size_t size)
3383 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3384 struct snd_soc_dpcm *dpcm;
3386 unsigned long flags;
3389 offset += scnprintf(buf + offset, size - offset,
3390 "[%s - %s]\n", fe->dai_link->name,
3391 stream ? "Capture" : "Playback");
3393 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
3394 dpcm_state_string(fe->dpcm[stream].state));
3396 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3397 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3398 offset += scnprintf(buf + offset, size - offset,
3400 "Format = %s, Channels = %d, Rate = %d\n",
3401 snd_pcm_format_name(params_format(params)),
3402 params_channels(params),
3403 params_rate(params));
3406 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
3408 if (list_empty(&fe->dpcm[stream].be_clients)) {
3409 offset += scnprintf(buf + offset, size - offset,
3410 " No active DSP links\n");
3414 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3415 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
3416 struct snd_soc_pcm_runtime *be = dpcm->be;
3417 params = &dpcm->hw_params;
3419 offset += scnprintf(buf + offset, size - offset,
3420 "- %s\n", be->dai_link->name);
3422 offset += scnprintf(buf + offset, size - offset,
3424 dpcm_state_string(be->dpcm[stream].state));
3426 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3427 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3428 offset += scnprintf(buf + offset, size - offset,
3429 " Hardware Params: "
3430 "Format = %s, Channels = %d, Rate = %d\n",
3431 snd_pcm_format_name(params_format(params)),
3432 params_channels(params),
3433 params_rate(params));
3435 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3440 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3441 size_t count, loff_t *ppos)
3443 struct snd_soc_pcm_runtime *fe = file->private_data;
3444 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3447 buf = kmalloc(out_count, GFP_KERNEL);
3451 if (fe->cpu_dai->driver->playback.channels_min)
3452 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3453 buf + offset, out_count - offset);
3455 if (fe->cpu_dai->driver->capture.channels_min)
3456 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3457 buf + offset, out_count - offset);
3459 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3465 static const struct file_operations dpcm_state_fops = {
3466 .open = simple_open,
3467 .read = dpcm_state_read_file,
3468 .llseek = default_llseek,
3471 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3476 if (!rtd->card->debugfs_card_root)
3479 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3480 rtd->card->debugfs_card_root);
3481 if (!rtd->debugfs_dpcm_root) {
3483 "ASoC: Failed to create dpcm debugfs directory %s\n",
3484 rtd->dai_link->name);
3488 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3489 rtd, &dpcm_state_fops);