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_runtime_activate() - Increment active count for PCM runtime components
33 * @rtd: ASoC PCM runtime that is activated
34 * @stream: Direction of the PCM stream
36 * Increments the active count for all the DAIs and components attached to a PCM
37 * runtime. Should typically be called when a stream is opened.
39 * Must be called with the rtd->card->pcm_mutex being held
41 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
43 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
44 struct snd_soc_dai *codec_dai;
47 lockdep_assert_held(&rtd->card->pcm_mutex);
49 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
50 cpu_dai->playback_active++;
51 for_each_rtd_codec_dai(rtd, i, codec_dai)
52 codec_dai->playback_active++;
54 cpu_dai->capture_active++;
55 for_each_rtd_codec_dai(rtd, i, codec_dai)
56 codec_dai->capture_active++;
60 cpu_dai->component->active++;
61 for_each_rtd_codec_dai(rtd, i, codec_dai) {
63 codec_dai->component->active++;
68 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
69 * @rtd: ASoC PCM runtime that is deactivated
70 * @stream: Direction of the PCM stream
72 * Decrements the active count for all the DAIs and components attached to a PCM
73 * runtime. Should typically be called when a stream is closed.
75 * Must be called with the rtd->card->pcm_mutex being held
77 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
79 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
80 struct snd_soc_dai *codec_dai;
83 lockdep_assert_held(&rtd->card->pcm_mutex);
85 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
86 cpu_dai->playback_active--;
87 for_each_rtd_codec_dai(rtd, i, codec_dai)
88 codec_dai->playback_active--;
90 cpu_dai->capture_active--;
91 for_each_rtd_codec_dai(rtd, i, codec_dai)
92 codec_dai->capture_active--;
96 cpu_dai->component->active--;
97 for_each_rtd_codec_dai(rtd, i, codec_dai) {
98 codec_dai->component->active--;
104 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
105 * @rtd: The ASoC PCM runtime that should be checked.
107 * This function checks whether the power down delay should be ignored for a
108 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
109 * been configured to ignore the delay, or if none of the components benefits
110 * from having the delay.
112 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
114 struct snd_soc_rtdcom_list *rtdcom;
115 struct snd_soc_component *component;
118 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
121 for_each_rtdcom(rtd, rtdcom) {
122 component = rtdcom->component;
124 ignore &= !component->driver->use_pmdown_time;
131 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
132 * @substream: the pcm substream
133 * @hw: the hardware parameters
135 * Sets the substream runtime hardware parameters.
137 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
138 const struct snd_pcm_hardware *hw)
140 struct snd_pcm_runtime *runtime = substream->runtime;
141 runtime->hw.info = hw->info;
142 runtime->hw.formats = hw->formats;
143 runtime->hw.period_bytes_min = hw->period_bytes_min;
144 runtime->hw.period_bytes_max = hw->period_bytes_max;
145 runtime->hw.periods_min = hw->periods_min;
146 runtime->hw.periods_max = hw->periods_max;
147 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
148 runtime->hw.fifo_size = hw->fifo_size;
151 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
153 /* DPCM stream event, send event to FE and all active BEs. */
154 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
157 struct snd_soc_dpcm *dpcm;
159 for_each_dpcm_be(fe, dir, dpcm) {
161 struct snd_soc_pcm_runtime *be = dpcm->be;
163 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
164 be->dai_link->name, event, dir);
166 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
167 (be->dpcm[dir].users >= 1))
170 snd_soc_dapm_stream_event(be, dir, event);
173 snd_soc_dapm_stream_event(fe, dir, event);
178 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
179 struct snd_soc_dai *soc_dai)
181 struct snd_soc_pcm_runtime *rtd = substream->private_data;
184 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
185 rtd->dai_link->symmetric_rates)) {
186 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
189 ret = snd_pcm_hw_constraint_single(substream->runtime,
190 SNDRV_PCM_HW_PARAM_RATE,
193 dev_err(soc_dai->dev,
194 "ASoC: Unable to apply rate constraint: %d\n",
200 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
201 rtd->dai_link->symmetric_channels)) {
202 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
205 ret = snd_pcm_hw_constraint_single(substream->runtime,
206 SNDRV_PCM_HW_PARAM_CHANNELS,
209 dev_err(soc_dai->dev,
210 "ASoC: Unable to apply channel symmetry constraint: %d\n",
216 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
217 rtd->dai_link->symmetric_samplebits)) {
218 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
219 soc_dai->sample_bits);
221 ret = snd_pcm_hw_constraint_single(substream->runtime,
222 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
223 soc_dai->sample_bits);
225 dev_err(soc_dai->dev,
226 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
235 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
236 struct snd_pcm_hw_params *params)
238 struct snd_soc_pcm_runtime *rtd = substream->private_data;
239 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
240 struct snd_soc_dai *codec_dai;
241 unsigned int rate, channels, sample_bits, symmetry, i;
243 rate = params_rate(params);
244 channels = params_channels(params);
245 sample_bits = snd_pcm_format_physical_width(params_format(params));
247 /* reject unmatched parameters when applying symmetry */
248 symmetry = cpu_dai->driver->symmetric_rates ||
249 rtd->dai_link->symmetric_rates;
251 for_each_rtd_codec_dai(rtd, i, codec_dai)
252 symmetry |= codec_dai->driver->symmetric_rates;
254 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
255 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
256 cpu_dai->rate, rate);
260 symmetry = cpu_dai->driver->symmetric_channels ||
261 rtd->dai_link->symmetric_channels;
263 for_each_rtd_codec_dai(rtd, i, codec_dai)
264 symmetry |= codec_dai->driver->symmetric_channels;
266 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
267 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
268 cpu_dai->channels, channels);
272 symmetry = cpu_dai->driver->symmetric_samplebits ||
273 rtd->dai_link->symmetric_samplebits;
275 for_each_rtd_codec_dai(rtd, i, codec_dai)
276 symmetry |= codec_dai->driver->symmetric_samplebits;
278 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
279 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
280 cpu_dai->sample_bits, sample_bits);
287 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
289 struct snd_soc_pcm_runtime *rtd = substream->private_data;
290 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
291 struct snd_soc_dai_link *link = rtd->dai_link;
292 struct snd_soc_dai *codec_dai;
293 unsigned int symmetry, i;
295 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
296 cpu_driver->symmetric_channels || link->symmetric_channels ||
297 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
299 for_each_rtd_codec_dai(rtd, i, codec_dai)
300 symmetry = symmetry ||
301 codec_dai->driver->symmetric_rates ||
302 codec_dai->driver->symmetric_channels ||
303 codec_dai->driver->symmetric_samplebits;
308 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
310 struct snd_soc_pcm_runtime *rtd = substream->private_data;
316 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
318 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
322 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
324 struct snd_soc_pcm_runtime *rtd = substream->private_data;
325 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
326 struct snd_soc_dai *codec_dai;
328 unsigned int bits = 0, cpu_bits;
330 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
331 for_each_rtd_codec_dai(rtd, i, codec_dai) {
332 if (codec_dai->driver->playback.sig_bits == 0) {
336 bits = max(codec_dai->driver->playback.sig_bits, bits);
338 cpu_bits = cpu_dai->driver->playback.sig_bits;
340 for_each_rtd_codec_dai(rtd, i, codec_dai) {
341 if (codec_dai->driver->capture.sig_bits == 0) {
345 bits = max(codec_dai->driver->capture.sig_bits, bits);
347 cpu_bits = cpu_dai->driver->capture.sig_bits;
350 soc_pcm_set_msb(substream, bits);
351 soc_pcm_set_msb(substream, cpu_bits);
354 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
356 struct snd_pcm_runtime *runtime = substream->runtime;
357 struct snd_pcm_hardware *hw = &runtime->hw;
358 struct snd_soc_pcm_runtime *rtd = substream->private_data;
359 struct snd_soc_dai *codec_dai;
360 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
361 struct snd_soc_dai_driver *codec_dai_drv;
362 struct snd_soc_pcm_stream *codec_stream;
363 struct snd_soc_pcm_stream *cpu_stream;
364 unsigned int chan_min = 0, chan_max = UINT_MAX;
365 unsigned int rate_min = 0, rate_max = UINT_MAX;
366 unsigned int rates = UINT_MAX;
367 u64 formats = ULLONG_MAX;
370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
371 cpu_stream = &cpu_dai_drv->playback;
373 cpu_stream = &cpu_dai_drv->capture;
375 /* first calculate min/max only for CODECs in the DAI link */
376 for_each_rtd_codec_dai(rtd, i, codec_dai) {
379 * Skip CODECs which don't support the current stream type.
380 * Otherwise, since the rate, channel, and format values will
381 * zero in that case, we would have no usable settings left,
382 * causing the resulting setup to fail.
383 * At least one CODEC should match, otherwise we should have
384 * bailed out on a higher level, since there would be no
385 * CODEC to support the transfer direction in that case.
387 if (!snd_soc_dai_stream_valid(codec_dai,
391 codec_dai_drv = codec_dai->driver;
392 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
393 codec_stream = &codec_dai_drv->playback;
395 codec_stream = &codec_dai_drv->capture;
396 chan_min = max(chan_min, codec_stream->channels_min);
397 chan_max = min(chan_max, codec_stream->channels_max);
398 rate_min = max(rate_min, codec_stream->rate_min);
399 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
400 formats &= codec_stream->formats;
401 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
405 * chan min/max cannot be enforced if there are multiple CODEC DAIs
406 * connected to a single CPU DAI, use CPU DAI's directly and let
407 * channel allocation be fixed up later
409 if (rtd->num_codecs > 1) {
410 chan_min = cpu_stream->channels_min;
411 chan_max = cpu_stream->channels_max;
414 hw->channels_min = max(chan_min, cpu_stream->channels_min);
415 hw->channels_max = min(chan_max, cpu_stream->channels_max);
417 hw->formats &= formats & cpu_stream->formats;
419 hw->formats = formats & cpu_stream->formats;
420 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
422 snd_pcm_limit_hw_rates(runtime);
424 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
425 hw->rate_min = max(hw->rate_min, rate_min);
426 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
427 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
430 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
431 struct snd_soc_component **last)
433 struct snd_soc_pcm_runtime *rtd = substream->private_data;
434 struct snd_soc_rtdcom_list *rtdcom;
435 struct snd_soc_component *component;
438 for_each_rtdcom(rtd, rtdcom) {
439 component = rtdcom->component;
442 ret = snd_soc_component_module_get_when_open(component);
444 dev_err(component->dev,
445 "ASoC: can't get module %s\n",
450 ret = snd_soc_component_open(component, substream);
452 dev_err(component->dev,
453 "ASoC: can't open component %s: %d\n",
454 component->name, ret);
462 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
463 struct snd_soc_component *last)
465 struct snd_soc_pcm_runtime *rtd = substream->private_data;
466 struct snd_soc_rtdcom_list *rtdcom;
467 struct snd_soc_component *component;
470 for_each_rtdcom(rtd, rtdcom) {
471 component = rtdcom->component;
473 if (component == last)
476 ret |= snd_soc_component_close(component, substream);
477 snd_soc_component_module_put_when_close(component);
484 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
485 * then initialized and any private data can be allocated. This also calls
486 * startup for the cpu DAI, component, machine and codec DAI.
488 static int soc_pcm_open(struct snd_pcm_substream *substream)
490 struct snd_soc_pcm_runtime *rtd = substream->private_data;
491 struct snd_pcm_runtime *runtime = substream->runtime;
492 struct snd_soc_component *component;
493 struct snd_soc_rtdcom_list *rtdcom;
494 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
495 struct snd_soc_dai *codec_dai;
496 const char *codec_dai_name = "multicodec";
499 pinctrl_pm_select_default_state(cpu_dai->dev);
500 for_each_rtd_codec_dai(rtd, i, codec_dai)
501 pinctrl_pm_select_default_state(codec_dai->dev);
503 for_each_rtdcom(rtd, rtdcom) {
504 component = rtdcom->component;
506 pm_runtime_get_sync(component->dev);
509 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
511 /* startup the audio subsystem */
512 ret = snd_soc_dai_startup(cpu_dai, substream);
514 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
519 ret = soc_pcm_components_open(substream, &component);
523 for_each_rtd_codec_dai(rtd, i, codec_dai) {
524 ret = snd_soc_dai_startup(codec_dai, substream);
526 dev_err(codec_dai->dev,
527 "ASoC: can't open codec %s: %d\n",
528 codec_dai->name, ret);
532 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
533 codec_dai->tx_mask = 0;
535 codec_dai->rx_mask = 0;
538 if (rtd->dai_link->ops->startup) {
539 ret = rtd->dai_link->ops->startup(substream);
541 pr_err("ASoC: %s startup failed: %d\n",
542 rtd->dai_link->name, ret);
547 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
548 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
551 /* Check that the codec and cpu DAIs are compatible */
552 soc_pcm_init_runtime_hw(substream);
554 if (rtd->num_codecs == 1)
555 codec_dai_name = rtd->codec_dai->name;
557 if (soc_pcm_has_symmetry(substream))
558 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
561 if (!runtime->hw.rates) {
562 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
563 codec_dai_name, cpu_dai->name);
566 if (!runtime->hw.formats) {
567 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
568 codec_dai_name, cpu_dai->name);
571 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
572 runtime->hw.channels_min > runtime->hw.channels_max) {
573 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
574 codec_dai_name, cpu_dai->name);
578 soc_pcm_apply_msb(substream);
580 /* Symmetry only applies if we've already got an active stream. */
581 if (cpu_dai->active) {
582 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
587 for_each_rtd_codec_dai(rtd, i, codec_dai) {
588 if (codec_dai->active) {
589 ret = soc_pcm_apply_symmetry(substream, codec_dai);
595 pr_debug("ASoC: %s <-> %s info:\n",
596 codec_dai_name, cpu_dai->name);
597 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
598 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
599 runtime->hw.channels_max);
600 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
601 runtime->hw.rate_max);
605 snd_soc_runtime_activate(rtd, substream->stream);
607 mutex_unlock(&rtd->card->pcm_mutex);
611 if (rtd->dai_link->ops->shutdown)
612 rtd->dai_link->ops->shutdown(substream);
618 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
619 snd_soc_dai_shutdown(codec_dai, substream);
622 soc_pcm_components_close(substream, component);
624 snd_soc_dai_shutdown(cpu_dai, substream);
626 mutex_unlock(&rtd->card->pcm_mutex);
628 for_each_rtdcom(rtd, rtdcom) {
629 component = rtdcom->component;
631 pm_runtime_mark_last_busy(component->dev);
632 pm_runtime_put_autosuspend(component->dev);
635 for_each_rtd_codec_dai(rtd, i, codec_dai) {
636 if (!codec_dai->active)
637 pinctrl_pm_select_sleep_state(codec_dai->dev);
639 if (!cpu_dai->active)
640 pinctrl_pm_select_sleep_state(cpu_dai->dev);
646 * Power down the audio subsystem pmdown_time msecs after close is called.
647 * This is to ensure there are no pops or clicks in between any music tracks
648 * due to DAPM power cycling.
650 static void close_delayed_work(struct work_struct *work)
652 struct snd_soc_pcm_runtime *rtd =
653 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
654 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
656 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
658 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
659 codec_dai->driver->playback.stream_name,
660 codec_dai->playback_active ? "active" : "inactive",
661 rtd->pop_wait ? "yes" : "no");
663 /* are we waiting on this codec DAI stream */
664 if (rtd->pop_wait == 1) {
666 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
667 SND_SOC_DAPM_STREAM_STOP);
670 mutex_unlock(&rtd->card->pcm_mutex);
673 static void codec2codec_close_delayed_work(struct work_struct *work)
676 * Currently nothing to do for c2c links
677 * Since c2c links are internal nodes in the DAPM graph and
678 * don't interface with the outside world or application layer
679 * we don't have to do any special handling on close.
684 * Called by ALSA when a PCM substream is closed. Private data can be
685 * freed here. The cpu DAI, codec DAI, machine and components are also
688 static int soc_pcm_close(struct snd_pcm_substream *substream)
690 struct snd_soc_pcm_runtime *rtd = substream->private_data;
691 struct snd_soc_component *component;
692 struct snd_soc_rtdcom_list *rtdcom;
693 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
694 struct snd_soc_dai *codec_dai;
697 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
699 snd_soc_runtime_deactivate(rtd, substream->stream);
701 /* clear the corresponding DAIs rate when inactive */
702 if (!cpu_dai->active)
705 for_each_rtd_codec_dai(rtd, i, codec_dai) {
706 if (!codec_dai->active)
710 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
712 snd_soc_dai_shutdown(cpu_dai, substream);
714 for_each_rtd_codec_dai(rtd, i, codec_dai)
715 snd_soc_dai_shutdown(codec_dai, substream);
717 if (rtd->dai_link->ops->shutdown)
718 rtd->dai_link->ops->shutdown(substream);
720 soc_pcm_components_close(substream, NULL);
722 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
723 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
724 /* powered down playback stream now */
725 snd_soc_dapm_stream_event(rtd,
726 SNDRV_PCM_STREAM_PLAYBACK,
727 SND_SOC_DAPM_STREAM_STOP);
729 /* start delayed pop wq here for playback streams */
731 queue_delayed_work(system_power_efficient_wq,
733 msecs_to_jiffies(rtd->pmdown_time));
736 /* capture streams can be powered down now */
737 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
738 SND_SOC_DAPM_STREAM_STOP);
741 mutex_unlock(&rtd->card->pcm_mutex);
743 for_each_rtdcom(rtd, rtdcom) {
744 component = rtdcom->component;
746 pm_runtime_mark_last_busy(component->dev);
747 pm_runtime_put_autosuspend(component->dev);
750 for_each_rtd_codec_dai(rtd, i, codec_dai) {
751 if (!codec_dai->active)
752 pinctrl_pm_select_sleep_state(codec_dai->dev);
754 if (!cpu_dai->active)
755 pinctrl_pm_select_sleep_state(cpu_dai->dev);
761 * Called by ALSA when the PCM substream is prepared, can set format, sample
762 * rate, etc. This function is non atomic and can be called multiple times,
763 * it can refer to the runtime info.
765 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
767 struct snd_soc_pcm_runtime *rtd = substream->private_data;
768 struct snd_soc_component *component;
769 struct snd_soc_rtdcom_list *rtdcom;
770 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
771 struct snd_soc_dai *codec_dai;
774 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
776 if (rtd->dai_link->ops->prepare) {
777 ret = rtd->dai_link->ops->prepare(substream);
779 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
785 for_each_rtdcom(rtd, rtdcom) {
786 component = rtdcom->component;
788 ret = snd_soc_component_prepare(component, substream);
790 dev_err(component->dev,
791 "ASoC: platform prepare error: %d\n", ret);
796 for_each_rtd_codec_dai(rtd, i, codec_dai) {
797 ret = snd_soc_dai_prepare(codec_dai, substream);
799 dev_err(codec_dai->dev,
800 "ASoC: codec DAI prepare error: %d\n",
806 ret = snd_soc_dai_prepare(cpu_dai, substream);
808 dev_err(cpu_dai->dev,
809 "ASoC: cpu DAI prepare error: %d\n", ret);
813 /* cancel any delayed stream shutdown that is pending */
814 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
817 cancel_delayed_work(&rtd->delayed_work);
820 snd_soc_dapm_stream_event(rtd, substream->stream,
821 SND_SOC_DAPM_STREAM_START);
823 for_each_rtd_codec_dai(rtd, i, codec_dai)
824 snd_soc_dai_digital_mute(codec_dai, 0,
826 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
829 mutex_unlock(&rtd->card->pcm_mutex);
833 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
836 struct snd_interval *interval;
837 int channels = hweight_long(mask);
839 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
840 interval->min = channels;
841 interval->max = channels;
844 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
845 struct snd_soc_component *last)
847 struct snd_soc_pcm_runtime *rtd = substream->private_data;
848 struct snd_soc_rtdcom_list *rtdcom;
849 struct snd_soc_component *component;
852 for_each_rtdcom(rtd, rtdcom) {
853 component = rtdcom->component;
855 if (component == last)
858 ret |= snd_soc_component_hw_free(component, substream);
865 * Called by ALSA when the hardware params are set by application. This
866 * function can also be called multiple times and can allocate buffers
867 * (using snd_pcm_lib_* ). It's non-atomic.
869 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
870 struct snd_pcm_hw_params *params)
872 struct snd_soc_pcm_runtime *rtd = substream->private_data;
873 struct snd_soc_component *component;
874 struct snd_soc_rtdcom_list *rtdcom;
875 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
876 struct snd_soc_dai *codec_dai;
879 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
881 ret = soc_pcm_params_symmetry(substream, params);
885 if (rtd->dai_link->ops->hw_params) {
886 ret = rtd->dai_link->ops->hw_params(substream, params);
888 dev_err(rtd->card->dev, "ASoC: machine hw_params"
889 " failed: %d\n", ret);
894 for_each_rtd_codec_dai(rtd, i, codec_dai) {
895 struct snd_pcm_hw_params codec_params;
898 * Skip CODECs which don't support the current stream type,
899 * the idea being that if a CODEC is not used for the currently
900 * set up transfer direction, it should not need to be
901 * configured, especially since the configuration used might
902 * not even be supported by that CODEC. There may be cases
903 * however where a CODEC needs to be set up although it is
904 * actually not being used for the transfer, e.g. if a
905 * capture-only CODEC is acting as an LRCLK and/or BCLK master
906 * for the DAI link including a playback-only CODEC.
907 * If this becomes necessary, we will have to augment the
908 * machine driver setup with information on how to act, so
909 * we can do the right thing here.
911 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
914 /* copy params for each codec */
915 codec_params = *params;
917 /* fixup params based on TDM slot masks */
918 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
920 soc_pcm_codec_params_fixup(&codec_params,
923 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
925 soc_pcm_codec_params_fixup(&codec_params,
928 ret = snd_soc_dai_hw_params(codec_dai, substream,
933 codec_dai->rate = params_rate(&codec_params);
934 codec_dai->channels = params_channels(&codec_params);
935 codec_dai->sample_bits = snd_pcm_format_physical_width(
936 params_format(&codec_params));
938 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
941 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
945 /* store the parameters for each DAIs */
946 cpu_dai->rate = params_rate(params);
947 cpu_dai->channels = params_channels(params);
948 cpu_dai->sample_bits =
949 snd_pcm_format_physical_width(params_format(params));
951 snd_soc_dapm_update_dai(substream, params, cpu_dai);
953 for_each_rtdcom(rtd, rtdcom) {
954 component = rtdcom->component;
956 ret = snd_soc_component_hw_params(component, substream, params);
958 dev_err(component->dev,
959 "ASoC: %s hw params failed: %d\n",
960 component->name, ret);
967 mutex_unlock(&rtd->card->pcm_mutex);
971 soc_pcm_components_hw_free(substream, component);
973 snd_soc_dai_hw_free(cpu_dai, substream);
980 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
981 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
984 snd_soc_dai_hw_free(codec_dai, substream);
988 if (rtd->dai_link->ops->hw_free)
989 rtd->dai_link->ops->hw_free(substream);
991 mutex_unlock(&rtd->card->pcm_mutex);
996 * Frees resources allocated by hw_params, can be called multiple times
998 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1000 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1001 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1002 struct snd_soc_dai *codec_dai;
1003 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1006 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
1008 /* clear the corresponding DAIs parameters when going to be inactive */
1009 if (cpu_dai->active == 1) {
1011 cpu_dai->channels = 0;
1012 cpu_dai->sample_bits = 0;
1015 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1016 if (codec_dai->active == 1) {
1017 codec_dai->rate = 0;
1018 codec_dai->channels = 0;
1019 codec_dai->sample_bits = 0;
1023 /* apply codec digital mute */
1024 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1025 if ((playback && codec_dai->playback_active == 1) ||
1026 (!playback && codec_dai->capture_active == 1))
1027 snd_soc_dai_digital_mute(codec_dai, 1,
1031 /* free any machine hw params */
1032 if (rtd->dai_link->ops->hw_free)
1033 rtd->dai_link->ops->hw_free(substream);
1035 /* free any component resources */
1036 soc_pcm_components_hw_free(substream, NULL);
1038 /* now free hw params for the DAIs */
1039 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1040 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1043 snd_soc_dai_hw_free(codec_dai, substream);
1046 snd_soc_dai_hw_free(cpu_dai, substream);
1048 mutex_unlock(&rtd->card->pcm_mutex);
1052 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1054 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1055 struct snd_soc_component *component;
1056 struct snd_soc_rtdcom_list *rtdcom;
1057 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1058 struct snd_soc_dai *codec_dai;
1061 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1062 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1067 for_each_rtdcom(rtd, rtdcom) {
1068 component = rtdcom->component;
1070 ret = snd_soc_component_trigger(component, substream, cmd);
1075 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1079 if (rtd->dai_link->ops->trigger) {
1080 ret = rtd->dai_link->ops->trigger(substream, cmd);
1088 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1091 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1092 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1093 struct snd_soc_dai *codec_dai;
1096 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1097 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1102 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1109 * soc level wrapper for pointer callback
1110 * If cpu_dai, codec_dai, component driver has the delay callback, then
1111 * the runtime->delay will be updated accordingly.
1113 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1115 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1116 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1117 struct snd_soc_dai *codec_dai;
1118 struct snd_pcm_runtime *runtime = substream->runtime;
1119 snd_pcm_uframes_t offset = 0;
1120 snd_pcm_sframes_t delay = 0;
1121 snd_pcm_sframes_t codec_delay = 0;
1124 /* clearing the previous total delay */
1127 offset = snd_soc_pcm_component_pointer(substream);
1129 /* base delay if assigned in pointer callback */
1130 delay = runtime->delay;
1132 delay += snd_soc_dai_delay(cpu_dai, substream);
1134 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1135 codec_delay = max(codec_delay,
1136 snd_soc_dai_delay(codec_dai, substream));
1138 delay += codec_delay;
1140 runtime->delay = delay;
1145 /* connect a FE and BE */
1146 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1147 struct snd_soc_pcm_runtime *be, int stream)
1149 struct snd_soc_dpcm *dpcm;
1150 unsigned long flags;
1151 #ifdef CONFIG_DEBUG_FS
1155 /* only add new dpcms */
1156 for_each_dpcm_be(fe, stream, dpcm) {
1157 if (dpcm->be == be && dpcm->fe == fe)
1161 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1167 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1168 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1169 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1170 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1171 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1172 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1174 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1175 stream ? "capture" : "playback", fe->dai_link->name,
1176 stream ? "<-" : "->", be->dai_link->name);
1178 #ifdef CONFIG_DEBUG_FS
1179 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1180 stream ? "capture" : "playback");
1182 dpcm->debugfs_state = debugfs_create_dir(name,
1183 fe->debugfs_dpcm_root);
1184 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1192 /* reparent a BE onto another FE */
1193 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1194 struct snd_soc_pcm_runtime *be, int stream)
1196 struct snd_soc_dpcm *dpcm;
1197 struct snd_pcm_substream *fe_substream, *be_substream;
1199 /* reparent if BE is connected to other FEs */
1200 if (!be->dpcm[stream].users)
1203 be_substream = snd_soc_dpcm_get_substream(be, stream);
1205 for_each_dpcm_fe(be, stream, dpcm) {
1209 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1210 stream ? "capture" : "playback",
1211 dpcm->fe->dai_link->name,
1212 stream ? "<-" : "->", dpcm->be->dai_link->name);
1214 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1215 be_substream->runtime = fe_substream->runtime;
1220 /* disconnect a BE and FE */
1221 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1223 struct snd_soc_dpcm *dpcm, *d;
1224 unsigned long flags;
1226 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1227 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1228 stream ? "capture" : "playback",
1229 dpcm->be->dai_link->name);
1231 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1234 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1235 stream ? "capture" : "playback", fe->dai_link->name,
1236 stream ? "<-" : "->", dpcm->be->dai_link->name);
1238 /* BEs still alive need new FE */
1239 dpcm_be_reparent(fe, dpcm->be, stream);
1241 #ifdef CONFIG_DEBUG_FS
1242 debugfs_remove_recursive(dpcm->debugfs_state);
1244 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1245 list_del(&dpcm->list_be);
1246 list_del(&dpcm->list_fe);
1247 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1252 /* get BE for DAI widget and stream */
1253 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1254 struct snd_soc_dapm_widget *widget, int stream)
1256 struct snd_soc_pcm_runtime *be;
1257 struct snd_soc_dai *dai;
1260 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1262 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1263 for_each_card_rtds(card, be) {
1265 if (!be->dai_link->no_pcm)
1268 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1269 be->cpu_dai->playback_widget ?
1270 be->cpu_dai->playback_widget->name : "(not set)");
1272 if (be->cpu_dai->playback_widget == widget)
1275 for_each_rtd_codec_dai(be, i, dai) {
1276 if (dai->playback_widget == widget)
1282 for_each_card_rtds(card, be) {
1284 if (!be->dai_link->no_pcm)
1287 dev_dbg(card->dev, "ASoC: try BE %s\n",
1288 be->cpu_dai->capture_widget ?
1289 be->cpu_dai->capture_widget->name : "(not set)");
1291 if (be->cpu_dai->capture_widget == widget)
1294 for_each_rtd_codec_dai(be, i, dai) {
1295 if (dai->capture_widget == widget)
1301 /* dai link name and stream name set correctly ? */
1302 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1303 stream ? "capture" : "playback", widget->name);
1307 static inline struct snd_soc_dapm_widget *
1308 dai_get_widget(struct snd_soc_dai *dai, int stream)
1310 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1311 return dai->playback_widget;
1313 return dai->capture_widget;
1316 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1317 struct snd_soc_dapm_widget *widget)
1321 for (i = 0; i < list->num_widgets; i++) {
1322 if (widget == list->widgets[i])
1329 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1330 enum snd_soc_dapm_direction dir)
1332 struct snd_soc_card *card = widget->dapm->card;
1333 struct snd_soc_pcm_runtime *rtd;
1334 struct snd_soc_dai *dai;
1337 if (dir == SND_SOC_DAPM_DIR_OUT) {
1338 for_each_card_rtds(card, rtd) {
1339 if (!rtd->dai_link->no_pcm)
1342 if (rtd->cpu_dai->playback_widget == widget)
1345 for_each_rtd_codec_dai(rtd, i, dai) {
1346 if (dai->playback_widget == widget)
1350 } else { /* SND_SOC_DAPM_DIR_IN */
1351 for_each_card_rtds(card, rtd) {
1352 if (!rtd->dai_link->no_pcm)
1355 if (rtd->cpu_dai->capture_widget == widget)
1358 for_each_rtd_codec_dai(rtd, i, dai) {
1359 if (dai->capture_widget == widget)
1368 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1369 int stream, struct snd_soc_dapm_widget_list **list)
1371 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1374 /* get number of valid DAI paths and their widgets */
1375 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1376 dpcm_end_walk_at_be);
1378 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1379 stream ? "capture" : "playback");
1384 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1385 struct snd_soc_dapm_widget_list **list_)
1387 struct snd_soc_dpcm *dpcm;
1388 struct snd_soc_dapm_widget_list *list = *list_;
1389 struct snd_soc_dapm_widget *widget;
1390 struct snd_soc_dai *dai;
1394 /* Destroy any old FE <--> BE connections */
1395 for_each_dpcm_be(fe, stream, dpcm) {
1398 /* is there a valid CPU DAI widget for this BE */
1399 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1401 /* prune the BE if it's no longer in our active list */
1402 if (widget && widget_in_list(list, widget))
1405 /* is there a valid CODEC DAI widget for this BE */
1407 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1408 widget = dai_get_widget(dai, stream);
1410 /* prune the BE if it's no longer in our active list */
1411 if (widget && widget_in_list(list, widget))
1417 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1418 stream ? "capture" : "playback",
1419 dpcm->be->dai_link->name, fe->dai_link->name);
1420 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1421 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1425 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1429 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1430 struct snd_soc_dapm_widget_list **list_)
1432 struct snd_soc_card *card = fe->card;
1433 struct snd_soc_dapm_widget_list *list = *list_;
1434 struct snd_soc_pcm_runtime *be;
1435 int i, new = 0, err;
1437 /* Create any new FE <--> BE connections */
1438 for (i = 0; i < list->num_widgets; i++) {
1440 switch (list->widgets[i]->id) {
1441 case snd_soc_dapm_dai_in:
1442 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1445 case snd_soc_dapm_dai_out:
1446 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1453 /* is there a valid BE rtd for this widget */
1454 be = dpcm_get_be(card, list->widgets[i], stream);
1456 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1457 list->widgets[i]->name);
1461 /* make sure BE is a real BE */
1462 if (!be->dai_link->no_pcm)
1465 /* don't connect if FE is not running */
1466 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1469 /* newly connected FE and BE */
1470 err = dpcm_be_connect(fe, be, stream);
1472 dev_err(fe->dev, "ASoC: can't connect %s\n",
1473 list->widgets[i]->name);
1475 } else if (err == 0) /* already connected */
1479 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1483 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1488 * Find the corresponding BE DAIs that source or sink audio to this
1491 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1492 int stream, struct snd_soc_dapm_widget_list **list, int new)
1495 return dpcm_add_paths(fe, stream, list);
1497 return dpcm_prune_paths(fe, stream, list);
1500 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1502 struct snd_soc_dpcm *dpcm;
1503 unsigned long flags;
1505 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1506 for_each_dpcm_be(fe, stream, dpcm)
1507 dpcm->be->dpcm[stream].runtime_update =
1508 SND_SOC_DPCM_UPDATE_NO;
1509 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1512 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1515 struct snd_soc_dpcm *dpcm;
1517 /* disable any enabled and non active backends */
1518 for_each_dpcm_be(fe, stream, dpcm) {
1520 struct snd_soc_pcm_runtime *be = dpcm->be;
1521 struct snd_pcm_substream *be_substream =
1522 snd_soc_dpcm_get_substream(be, stream);
1524 if (be->dpcm[stream].users == 0)
1525 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1526 stream ? "capture" : "playback",
1527 be->dpcm[stream].state);
1529 if (--be->dpcm[stream].users != 0)
1532 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1535 soc_pcm_close(be_substream);
1536 be_substream->runtime = NULL;
1537 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1541 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1543 struct snd_soc_dpcm *dpcm;
1546 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1547 for_each_dpcm_be(fe, stream, dpcm) {
1549 struct snd_soc_pcm_runtime *be = dpcm->be;
1550 struct snd_pcm_substream *be_substream =
1551 snd_soc_dpcm_get_substream(be, stream);
1553 if (!be_substream) {
1554 dev_err(be->dev, "ASoC: no backend %s stream\n",
1555 stream ? "capture" : "playback");
1559 /* is this op for this BE ? */
1560 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1563 /* first time the dpcm is open ? */
1564 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1565 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1566 stream ? "capture" : "playback",
1567 be->dpcm[stream].state);
1569 if (be->dpcm[stream].users++ != 0)
1572 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1573 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1576 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1577 stream ? "capture" : "playback", be->dai_link->name);
1579 be_substream->runtime = be->dpcm[stream].runtime;
1580 err = soc_pcm_open(be_substream);
1582 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1583 be->dpcm[stream].users--;
1584 if (be->dpcm[stream].users < 0)
1585 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1586 stream ? "capture" : "playback",
1587 be->dpcm[stream].state);
1589 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1593 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1600 /* disable any enabled and non active backends */
1601 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1602 struct snd_soc_pcm_runtime *be = dpcm->be;
1603 struct snd_pcm_substream *be_substream =
1604 snd_soc_dpcm_get_substream(be, stream);
1606 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1609 if (be->dpcm[stream].users == 0)
1610 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1611 stream ? "capture" : "playback",
1612 be->dpcm[stream].state);
1614 if (--be->dpcm[stream].users != 0)
1617 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1620 soc_pcm_close(be_substream);
1621 be_substream->runtime = NULL;
1622 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1628 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1629 struct snd_soc_pcm_stream *stream)
1631 runtime->hw.rate_min = stream->rate_min;
1632 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1633 runtime->hw.channels_min = stream->channels_min;
1634 runtime->hw.channels_max = stream->channels_max;
1635 if (runtime->hw.formats)
1636 runtime->hw.formats &= stream->formats;
1638 runtime->hw.formats = stream->formats;
1639 runtime->hw.rates = stream->rates;
1642 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1645 struct snd_soc_pcm_runtime *fe = substream->private_data;
1646 struct snd_soc_dpcm *dpcm;
1647 struct snd_soc_dai *dai;
1648 int stream = substream->stream;
1650 if (!fe->dai_link->dpcm_merged_format)
1654 * It returns merged BE codec format
1655 * if FE want to use it (= dpcm_merged_format)
1658 for_each_dpcm_be(fe, stream, dpcm) {
1659 struct snd_soc_pcm_runtime *be = dpcm->be;
1660 struct snd_soc_dai_driver *codec_dai_drv;
1661 struct snd_soc_pcm_stream *codec_stream;
1664 for_each_rtd_codec_dai(be, i, dai) {
1666 * Skip CODECs which don't support the current stream
1667 * type. See soc_pcm_init_runtime_hw() for more details
1669 if (!snd_soc_dai_stream_valid(dai, stream))
1672 codec_dai_drv = dai->driver;
1673 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1674 codec_stream = &codec_dai_drv->playback;
1676 codec_stream = &codec_dai_drv->capture;
1678 *formats &= codec_stream->formats;
1683 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1684 unsigned int *channels_min,
1685 unsigned int *channels_max)
1687 struct snd_soc_pcm_runtime *fe = substream->private_data;
1688 struct snd_soc_dpcm *dpcm;
1689 int stream = substream->stream;
1691 if (!fe->dai_link->dpcm_merged_chan)
1695 * It returns merged BE codec channel;
1696 * if FE want to use it (= dpcm_merged_chan)
1699 for_each_dpcm_be(fe, stream, dpcm) {
1700 struct snd_soc_pcm_runtime *be = dpcm->be;
1701 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1702 struct snd_soc_dai_driver *codec_dai_drv;
1703 struct snd_soc_pcm_stream *codec_stream;
1704 struct snd_soc_pcm_stream *cpu_stream;
1706 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1707 cpu_stream = &cpu_dai_drv->playback;
1709 cpu_stream = &cpu_dai_drv->capture;
1711 *channels_min = max(*channels_min, cpu_stream->channels_min);
1712 *channels_max = min(*channels_max, cpu_stream->channels_max);
1715 * chan min/max cannot be enforced if there are multiple CODEC
1716 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1718 if (be->num_codecs == 1) {
1719 codec_dai_drv = be->codec_dais[0]->driver;
1721 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1722 codec_stream = &codec_dai_drv->playback;
1724 codec_stream = &codec_dai_drv->capture;
1726 *channels_min = max(*channels_min,
1727 codec_stream->channels_min);
1728 *channels_max = min(*channels_max,
1729 codec_stream->channels_max);
1734 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1735 unsigned int *rates,
1736 unsigned int *rate_min,
1737 unsigned int *rate_max)
1739 struct snd_soc_pcm_runtime *fe = substream->private_data;
1740 struct snd_soc_dpcm *dpcm;
1741 int stream = substream->stream;
1743 if (!fe->dai_link->dpcm_merged_rate)
1747 * It returns merged BE codec channel;
1748 * if FE want to use it (= dpcm_merged_chan)
1751 for_each_dpcm_be(fe, stream, dpcm) {
1752 struct snd_soc_pcm_runtime *be = dpcm->be;
1753 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1754 struct snd_soc_dai_driver *codec_dai_drv;
1755 struct snd_soc_pcm_stream *codec_stream;
1756 struct snd_soc_pcm_stream *cpu_stream;
1757 struct snd_soc_dai *dai;
1760 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1761 cpu_stream = &cpu_dai_drv->playback;
1763 cpu_stream = &cpu_dai_drv->capture;
1765 *rate_min = max(*rate_min, cpu_stream->rate_min);
1766 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1767 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1769 for_each_rtd_codec_dai(be, i, dai) {
1771 * Skip CODECs which don't support the current stream
1772 * type. See soc_pcm_init_runtime_hw() for more details
1774 if (!snd_soc_dai_stream_valid(dai, stream))
1777 codec_dai_drv = dai->driver;
1778 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1779 codec_stream = &codec_dai_drv->playback;
1781 codec_stream = &codec_dai_drv->capture;
1783 *rate_min = max(*rate_min, codec_stream->rate_min);
1784 *rate_max = min_not_zero(*rate_max,
1785 codec_stream->rate_max);
1786 *rates = snd_pcm_rate_mask_intersect(*rates,
1787 codec_stream->rates);
1792 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1794 struct snd_pcm_runtime *runtime = substream->runtime;
1795 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1796 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1797 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1799 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1800 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1802 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1804 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1805 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1806 &runtime->hw.channels_max);
1807 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1808 &runtime->hw.rate_min, &runtime->hw.rate_max);
1811 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1813 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1814 * for avoiding the race with trigger callback.
1815 * If the state is unset and a trigger is pending while the previous operation,
1816 * process the pending trigger action here.
1818 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1819 int stream, enum snd_soc_dpcm_update state)
1821 struct snd_pcm_substream *substream =
1822 snd_soc_dpcm_get_substream(fe, stream);
1824 snd_pcm_stream_lock_irq(substream);
1825 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1826 dpcm_fe_dai_do_trigger(substream,
1827 fe->dpcm[stream].trigger_pending - 1);
1828 fe->dpcm[stream].trigger_pending = 0;
1830 fe->dpcm[stream].runtime_update = state;
1831 snd_pcm_stream_unlock_irq(substream);
1834 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1837 struct snd_soc_dpcm *dpcm;
1838 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1839 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1842 /* apply symmetry for FE */
1843 if (soc_pcm_has_symmetry(fe_substream))
1844 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1846 /* Symmetry only applies if we've got an active stream. */
1847 if (fe_cpu_dai->active) {
1848 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1853 /* apply symmetry for BE */
1854 for_each_dpcm_be(fe, stream, dpcm) {
1855 struct snd_soc_pcm_runtime *be = dpcm->be;
1856 struct snd_pcm_substream *be_substream =
1857 snd_soc_dpcm_get_substream(be, stream);
1858 struct snd_soc_pcm_runtime *rtd;
1859 struct snd_soc_dai *codec_dai;
1862 /* A backend may not have the requested substream */
1866 rtd = be_substream->private_data;
1867 if (rtd->dai_link->be_hw_params_fixup)
1870 if (soc_pcm_has_symmetry(be_substream))
1871 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1873 /* Symmetry only applies if we've got an active stream. */
1874 if (rtd->cpu_dai->active) {
1875 err = soc_pcm_apply_symmetry(fe_substream,
1881 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1882 if (codec_dai->active) {
1883 err = soc_pcm_apply_symmetry(fe_substream,
1894 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1896 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1897 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1898 int stream = fe_substream->stream, ret = 0;
1900 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1902 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1904 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1908 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1910 /* start the DAI frontend */
1911 ret = soc_pcm_open(fe_substream);
1913 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1917 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1919 dpcm_set_fe_runtime(fe_substream);
1920 snd_pcm_limit_hw_rates(runtime);
1922 ret = dpcm_apply_symmetry(fe_substream, stream);
1924 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1929 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1933 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1935 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1939 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1941 struct snd_soc_dpcm *dpcm;
1943 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1944 for_each_dpcm_be(fe, stream, dpcm) {
1946 struct snd_soc_pcm_runtime *be = dpcm->be;
1947 struct snd_pcm_substream *be_substream =
1948 snd_soc_dpcm_get_substream(be, stream);
1950 /* is this op for this BE ? */
1951 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1954 if (be->dpcm[stream].users == 0)
1955 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1956 stream ? "capture" : "playback",
1957 be->dpcm[stream].state);
1959 if (--be->dpcm[stream].users != 0)
1962 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1963 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1964 soc_pcm_hw_free(be_substream);
1965 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1968 dev_dbg(be->dev, "ASoC: close BE %s\n",
1969 be->dai_link->name);
1971 soc_pcm_close(be_substream);
1972 be_substream->runtime = NULL;
1974 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1979 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1981 struct snd_soc_pcm_runtime *fe = substream->private_data;
1982 int stream = substream->stream;
1984 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1986 /* shutdown the BEs */
1987 dpcm_be_dai_shutdown(fe, substream->stream);
1989 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1991 /* now shutdown the frontend */
1992 soc_pcm_close(substream);
1994 /* run the stream event for each BE */
1995 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1997 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1998 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2002 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2004 struct snd_soc_dpcm *dpcm;
2006 /* only hw_params backends that are either sinks or sources
2007 * to this frontend DAI */
2008 for_each_dpcm_be(fe, stream, dpcm) {
2010 struct snd_soc_pcm_runtime *be = dpcm->be;
2011 struct snd_pcm_substream *be_substream =
2012 snd_soc_dpcm_get_substream(be, stream);
2014 /* is this op for this BE ? */
2015 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2018 /* only free hw when no longer used - check all FEs */
2019 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2022 /* do not free hw if this BE is used by other FE */
2023 if (be->dpcm[stream].users > 1)
2026 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2027 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2028 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2029 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2030 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2031 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2034 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2035 be->dai_link->name);
2037 soc_pcm_hw_free(be_substream);
2039 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2045 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2047 struct snd_soc_pcm_runtime *fe = substream->private_data;
2048 int err, stream = substream->stream;
2050 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2051 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2053 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2055 /* call hw_free on the frontend */
2056 err = soc_pcm_hw_free(substream);
2058 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2059 fe->dai_link->name);
2061 /* only hw_params backends that are either sinks or sources
2062 * to this frontend DAI */
2063 err = dpcm_be_dai_hw_free(fe, stream);
2065 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2066 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2068 mutex_unlock(&fe->card->mutex);
2072 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2074 struct snd_soc_dpcm *dpcm;
2077 for_each_dpcm_be(fe, stream, dpcm) {
2079 struct snd_soc_pcm_runtime *be = dpcm->be;
2080 struct snd_pcm_substream *be_substream =
2081 snd_soc_dpcm_get_substream(be, stream);
2083 /* is this op for this BE ? */
2084 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2087 /* copy params for each dpcm */
2088 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2089 sizeof(struct snd_pcm_hw_params));
2091 /* perform any hw_params fixups */
2092 if (be->dai_link->be_hw_params_fixup) {
2093 ret = be->dai_link->be_hw_params_fixup(be,
2097 "ASoC: hw_params BE fixup failed %d\n",
2103 /* copy the fixed-up hw params for BE dai */
2104 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2105 sizeof(struct snd_pcm_hw_params));
2107 /* only allow hw_params() if no connected FEs are running */
2108 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2111 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2113 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2116 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2117 be->dai_link->name);
2119 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2121 dev_err(dpcm->be->dev,
2122 "ASoC: hw_params BE failed %d\n", ret);
2126 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2131 /* disable any enabled and non active backends */
2132 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2133 struct snd_soc_pcm_runtime *be = dpcm->be;
2134 struct snd_pcm_substream *be_substream =
2135 snd_soc_dpcm_get_substream(be, stream);
2137 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2140 /* only allow hw_free() if no connected FEs are running */
2141 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2144 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2145 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2147 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2150 soc_pcm_hw_free(be_substream);
2156 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2157 struct snd_pcm_hw_params *params)
2159 struct snd_soc_pcm_runtime *fe = substream->private_data;
2160 int ret, stream = substream->stream;
2162 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2163 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2165 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2166 sizeof(struct snd_pcm_hw_params));
2167 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2169 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2173 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2174 fe->dai_link->name, params_rate(params),
2175 params_channels(params), params_format(params));
2177 /* call hw_params on the frontend */
2178 ret = soc_pcm_hw_params(substream, params);
2180 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2181 dpcm_be_dai_hw_free(fe, stream);
2183 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2186 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2187 mutex_unlock(&fe->card->mutex);
2191 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2192 struct snd_pcm_substream *substream, int cmd)
2196 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2197 dpcm->be->dai_link->name, cmd);
2199 ret = soc_pcm_trigger(substream, cmd);
2201 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2206 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2209 struct snd_soc_dpcm *dpcm;
2212 for_each_dpcm_be(fe, stream, dpcm) {
2214 struct snd_soc_pcm_runtime *be = dpcm->be;
2215 struct snd_pcm_substream *be_substream =
2216 snd_soc_dpcm_get_substream(be, stream);
2218 /* is this op for this BE ? */
2219 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2223 case SNDRV_PCM_TRIGGER_START:
2224 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2225 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2226 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2229 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2233 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2235 case SNDRV_PCM_TRIGGER_RESUME:
2236 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2239 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2243 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2245 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2246 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2249 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2253 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2255 case SNDRV_PCM_TRIGGER_STOP:
2256 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2257 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2260 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2263 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2267 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2269 case SNDRV_PCM_TRIGGER_SUSPEND:
2270 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2273 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2276 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2280 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2282 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2283 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2286 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2289 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2293 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2300 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2302 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2303 int cmd, bool fe_first)
2305 struct snd_soc_pcm_runtime *fe = substream->private_data;
2308 /* call trigger on the frontend before the backend. */
2310 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2311 fe->dai_link->name, cmd);
2313 ret = soc_pcm_trigger(substream, cmd);
2317 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2321 /* call trigger on the frontend after the backend. */
2322 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2326 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2327 fe->dai_link->name, cmd);
2329 ret = soc_pcm_trigger(substream, cmd);
2334 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2336 struct snd_soc_pcm_runtime *fe = substream->private_data;
2337 int stream = substream->stream;
2339 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2341 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2344 case SND_SOC_DPCM_TRIGGER_PRE:
2346 case SNDRV_PCM_TRIGGER_START:
2347 case SNDRV_PCM_TRIGGER_RESUME:
2348 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2349 case SNDRV_PCM_TRIGGER_DRAIN:
2350 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2352 case SNDRV_PCM_TRIGGER_STOP:
2353 case SNDRV_PCM_TRIGGER_SUSPEND:
2354 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2355 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2362 case SND_SOC_DPCM_TRIGGER_POST:
2364 case SNDRV_PCM_TRIGGER_START:
2365 case SNDRV_PCM_TRIGGER_RESUME:
2366 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2367 case SNDRV_PCM_TRIGGER_DRAIN:
2368 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2370 case SNDRV_PCM_TRIGGER_STOP:
2371 case SNDRV_PCM_TRIGGER_SUSPEND:
2372 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2373 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2380 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2381 /* bespoke trigger() - handles both FE and BEs */
2383 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2384 fe->dai_link->name, cmd);
2386 ret = soc_pcm_bespoke_trigger(substream, cmd);
2389 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2390 fe->dai_link->name);
2396 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2402 case SNDRV_PCM_TRIGGER_START:
2403 case SNDRV_PCM_TRIGGER_RESUME:
2404 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2405 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2407 case SNDRV_PCM_TRIGGER_STOP:
2408 case SNDRV_PCM_TRIGGER_SUSPEND:
2409 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2411 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2412 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2417 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2421 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2423 struct snd_soc_pcm_runtime *fe = substream->private_data;
2424 int stream = substream->stream;
2426 /* if FE's runtime_update is already set, we're in race;
2427 * process this trigger later at exit
2429 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2430 fe->dpcm[stream].trigger_pending = cmd + 1;
2431 return 0; /* delayed, assuming it's successful */
2434 /* we're alone, let's trigger */
2435 return dpcm_fe_dai_do_trigger(substream, cmd);
2438 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2440 struct snd_soc_dpcm *dpcm;
2443 for_each_dpcm_be(fe, stream, dpcm) {
2445 struct snd_soc_pcm_runtime *be = dpcm->be;
2446 struct snd_pcm_substream *be_substream =
2447 snd_soc_dpcm_get_substream(be, stream);
2449 /* is this op for this BE ? */
2450 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2453 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2454 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2455 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2456 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2459 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2460 be->dai_link->name);
2462 ret = soc_pcm_prepare(be_substream);
2464 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2469 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2474 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2476 struct snd_soc_pcm_runtime *fe = substream->private_data;
2477 int stream = substream->stream, ret = 0;
2479 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2481 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2483 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2485 /* there is no point preparing this FE if there are no BEs */
2486 if (list_empty(&fe->dpcm[stream].be_clients)) {
2487 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2488 fe->dai_link->name);
2493 ret = dpcm_be_dai_prepare(fe, substream->stream);
2497 /* call prepare on the frontend */
2498 ret = soc_pcm_prepare(substream);
2500 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2501 fe->dai_link->name);
2505 /* run the stream event for each BE */
2506 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2507 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2510 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2511 mutex_unlock(&fe->card->mutex);
2516 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2518 struct snd_pcm_substream *substream =
2519 snd_soc_dpcm_get_substream(fe, stream);
2520 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2523 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2524 stream ? "capture" : "playback", fe->dai_link->name);
2526 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2527 /* call bespoke trigger - FE takes care of all BE triggers */
2528 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2529 fe->dai_link->name);
2531 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2533 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2535 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2536 fe->dai_link->name);
2538 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2540 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2543 err = dpcm_be_dai_hw_free(fe, stream);
2545 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2547 err = dpcm_be_dai_shutdown(fe, stream);
2549 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2551 /* run the stream event for each BE */
2552 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2557 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2559 struct snd_pcm_substream *substream =
2560 snd_soc_dpcm_get_substream(fe, stream);
2561 struct snd_soc_dpcm *dpcm;
2562 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2564 unsigned long flags;
2566 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2567 stream ? "capture" : "playback", fe->dai_link->name);
2569 /* Only start the BE if the FE is ready */
2570 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2571 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2574 /* startup must always be called for new BEs */
2575 ret = dpcm_be_dai_startup(fe, stream);
2579 /* keep going if FE state is > open */
2580 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2583 ret = dpcm_be_dai_hw_params(fe, stream);
2587 /* keep going if FE state is > hw_params */
2588 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2592 ret = dpcm_be_dai_prepare(fe, stream);
2596 /* run the stream event for each BE */
2597 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2599 /* keep going if FE state is > prepare */
2600 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2601 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2604 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2605 /* call trigger on the frontend - FE takes care of all BE triggers */
2606 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2607 fe->dai_link->name);
2609 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2611 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2615 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2616 fe->dai_link->name);
2618 ret = dpcm_be_dai_trigger(fe, stream,
2619 SNDRV_PCM_TRIGGER_START);
2621 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2629 dpcm_be_dai_hw_free(fe, stream);
2631 dpcm_be_dai_shutdown(fe, stream);
2633 /* disconnect any non started BEs */
2634 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2635 for_each_dpcm_be(fe, stream, dpcm) {
2636 struct snd_soc_pcm_runtime *be = dpcm->be;
2637 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2638 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2640 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2645 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2649 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2650 ret = dpcm_run_update_startup(fe, stream);
2652 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2653 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2658 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2662 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2663 ret = dpcm_run_update_shutdown(fe, stream);
2665 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2666 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2671 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2673 struct snd_soc_dapm_widget_list *list;
2676 if (!fe->dai_link->dynamic)
2679 /* only check active links */
2680 if (!fe->cpu_dai->active)
2683 /* DAPM sync will call this to update DSP paths */
2684 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2685 new ? "new" : "old", fe->dai_link->name);
2687 /* skip if FE doesn't have playback capability */
2688 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2689 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2692 /* skip if FE isn't currently playing */
2693 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2696 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2698 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2699 fe->dai_link->name, "playback");
2703 /* update any playback paths */
2704 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2707 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2709 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2711 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2712 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2715 dpcm_path_put(&list);
2718 /* skip if FE doesn't have capture capability */
2719 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2720 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2723 /* skip if FE isn't currently capturing */
2724 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2727 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2729 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2730 fe->dai_link->name, "capture");
2734 /* update any old capture paths */
2735 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2738 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2740 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2742 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2743 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2746 dpcm_path_put(&list);
2751 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2754 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2756 struct snd_soc_pcm_runtime *fe;
2759 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2760 /* shutdown all old paths first */
2761 for_each_card_rtds(card, fe) {
2762 ret = soc_dpcm_fe_runtime_update(fe, 0);
2767 /* bring new paths up */
2768 for_each_card_rtds(card, fe) {
2769 ret = soc_dpcm_fe_runtime_update(fe, 1);
2775 mutex_unlock(&card->mutex);
2778 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2780 struct snd_soc_dpcm *dpcm;
2781 struct snd_soc_dai *dai;
2783 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2785 struct snd_soc_pcm_runtime *be = dpcm->be;
2788 if (be->dai_link->ignore_suspend)
2791 for_each_rtd_codec_dai(be, i, dai) {
2792 struct snd_soc_dai_driver *drv = dai->driver;
2794 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2795 be->dai_link->name);
2797 if (drv->ops && drv->ops->digital_mute &&
2798 dai->playback_active)
2799 drv->ops->digital_mute(dai, mute);
2806 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2808 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2809 struct snd_soc_dpcm *dpcm;
2810 struct snd_soc_dapm_widget_list *list;
2812 int stream = fe_substream->stream;
2814 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2815 fe->dpcm[stream].runtime = fe_substream->runtime;
2817 ret = dpcm_path_get(fe, stream, &list);
2819 mutex_unlock(&fe->card->mutex);
2821 } else if (ret == 0) {
2822 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2823 fe->dai_link->name, stream ? "capture" : "playback");
2826 /* calculate valid and active FE <-> BE dpcms */
2827 dpcm_process_paths(fe, stream, &list, 1);
2829 ret = dpcm_fe_dai_startup(fe_substream);
2831 /* clean up all links */
2832 for_each_dpcm_be(fe, stream, dpcm)
2833 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2835 dpcm_be_disconnect(fe, stream);
2836 fe->dpcm[stream].runtime = NULL;
2839 dpcm_clear_pending_state(fe, stream);
2840 dpcm_path_put(&list);
2841 mutex_unlock(&fe->card->mutex);
2845 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2847 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2848 struct snd_soc_dpcm *dpcm;
2849 int stream = fe_substream->stream, ret;
2851 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2852 ret = dpcm_fe_dai_shutdown(fe_substream);
2854 /* mark FE's links ready to prune */
2855 for_each_dpcm_be(fe, stream, dpcm)
2856 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2858 dpcm_be_disconnect(fe, stream);
2860 fe->dpcm[stream].runtime = NULL;
2861 mutex_unlock(&fe->card->mutex);
2865 static void soc_pcm_private_free(struct snd_pcm *pcm)
2867 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2869 /* need to sync the delayed work before releasing resources */
2870 flush_delayed_work(&rtd->delayed_work);
2871 snd_soc_pcm_component_free(pcm);
2874 /* create a new pcm */
2875 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2877 struct snd_soc_dai *codec_dai;
2878 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2879 struct snd_soc_rtdcom_list *rtdcom;
2880 struct snd_pcm *pcm;
2882 int ret = 0, playback = 0, capture = 0;
2885 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2886 playback = rtd->dai_link->dpcm_playback;
2887 capture = rtd->dai_link->dpcm_capture;
2889 /* Adapt stream for codec2codec links */
2890 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2891 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2892 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2893 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2895 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2896 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2897 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2899 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2900 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2904 capture = capture && cpu_capture->channels_min;
2905 playback = playback && cpu_playback->channels_min;
2908 if (rtd->dai_link->playback_only) {
2913 if (rtd->dai_link->capture_only) {
2918 /* create the PCM */
2919 if (rtd->dai_link->params) {
2920 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2921 rtd->dai_link->stream_name);
2923 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2924 playback, capture, &pcm);
2925 } else if (rtd->dai_link->no_pcm) {
2926 snprintf(new_name, sizeof(new_name), "(%s)",
2927 rtd->dai_link->stream_name);
2929 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2930 playback, capture, &pcm);
2932 if (rtd->dai_link->dynamic)
2933 snprintf(new_name, sizeof(new_name), "%s (*)",
2934 rtd->dai_link->stream_name);
2936 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2937 rtd->dai_link->stream_name,
2938 (rtd->num_codecs > 1) ?
2939 "multicodec" : rtd->codec_dai->name, num);
2941 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2945 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2946 rtd->dai_link->name);
2949 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2951 /* DAPM dai link stream work */
2952 if (rtd->dai_link->params)
2953 INIT_DELAYED_WORK(&rtd->delayed_work,
2954 codec2codec_close_delayed_work);
2956 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2958 pcm->nonatomic = rtd->dai_link->nonatomic;
2960 pcm->private_data = rtd;
2962 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2964 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2966 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2970 /* ASoC PCM operations */
2971 if (rtd->dai_link->dynamic) {
2972 rtd->ops.open = dpcm_fe_dai_open;
2973 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2974 rtd->ops.prepare = dpcm_fe_dai_prepare;
2975 rtd->ops.trigger = dpcm_fe_dai_trigger;
2976 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2977 rtd->ops.close = dpcm_fe_dai_close;
2978 rtd->ops.pointer = soc_pcm_pointer;
2979 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2981 rtd->ops.open = soc_pcm_open;
2982 rtd->ops.hw_params = soc_pcm_hw_params;
2983 rtd->ops.prepare = soc_pcm_prepare;
2984 rtd->ops.trigger = soc_pcm_trigger;
2985 rtd->ops.hw_free = soc_pcm_hw_free;
2986 rtd->ops.close = soc_pcm_close;
2987 rtd->ops.pointer = soc_pcm_pointer;
2988 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2991 for_each_rtdcom(rtd, rtdcom) {
2992 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
2998 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
3000 rtd->ops.page = snd_soc_pcm_component_page;
3002 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3006 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3009 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3011 ret = snd_soc_pcm_component_new(pcm);
3013 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3017 pcm->private_free = soc_pcm_private_free;
3018 pcm->no_device_suspend = true;
3020 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3021 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3026 /* is the current PCM operation for this FE ? */
3027 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3029 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3033 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3035 /* is the current PCM operation for this BE ? */
3036 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3037 struct snd_soc_pcm_runtime *be, int stream)
3039 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3040 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3041 be->dpcm[stream].runtime_update))
3045 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3047 /* get the substream for this BE */
3048 struct snd_pcm_substream *
3049 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3051 return be->pcm->streams[stream].substream;
3053 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3055 /* get the BE runtime state */
3056 enum snd_soc_dpcm_state
3057 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3059 return be->dpcm[stream].state;
3061 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3063 /* set the BE runtime state */
3064 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3065 int stream, enum snd_soc_dpcm_state state)
3067 be->dpcm[stream].state = state;
3069 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3072 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3073 * are not running, paused or suspended for the specified stream direction.
3075 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3076 struct snd_soc_pcm_runtime *be, int stream)
3078 struct snd_soc_dpcm *dpcm;
3081 unsigned long flags;
3083 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3084 for_each_dpcm_fe(be, stream, dpcm) {
3089 state = dpcm->fe->dpcm[stream].state;
3090 if (state == SND_SOC_DPCM_STATE_START ||
3091 state == SND_SOC_DPCM_STATE_PAUSED ||
3092 state == SND_SOC_DPCM_STATE_SUSPEND) {
3097 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3099 /* it's safe to free/stop this BE DAI */
3102 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3105 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3106 * running, paused or suspended for the specified stream direction.
3108 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3109 struct snd_soc_pcm_runtime *be, int stream)
3111 struct snd_soc_dpcm *dpcm;
3114 unsigned long flags;
3116 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3117 for_each_dpcm_fe(be, stream, dpcm) {
3122 state = dpcm->fe->dpcm[stream].state;
3123 if (state == SND_SOC_DPCM_STATE_START ||
3124 state == SND_SOC_DPCM_STATE_PAUSED ||
3125 state == SND_SOC_DPCM_STATE_SUSPEND ||
3126 state == SND_SOC_DPCM_STATE_PREPARE) {
3131 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3133 /* it's safe to change hw_params */
3136 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3138 #ifdef CONFIG_DEBUG_FS
3139 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3142 case SND_SOC_DPCM_STATE_NEW:
3144 case SND_SOC_DPCM_STATE_OPEN:
3146 case SND_SOC_DPCM_STATE_HW_PARAMS:
3148 case SND_SOC_DPCM_STATE_PREPARE:
3150 case SND_SOC_DPCM_STATE_START:
3152 case SND_SOC_DPCM_STATE_STOP:
3154 case SND_SOC_DPCM_STATE_SUSPEND:
3156 case SND_SOC_DPCM_STATE_PAUSED:
3158 case SND_SOC_DPCM_STATE_HW_FREE:
3160 case SND_SOC_DPCM_STATE_CLOSE:
3167 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3168 int stream, char *buf, size_t size)
3170 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3171 struct snd_soc_dpcm *dpcm;
3173 unsigned long flags;
3176 offset += scnprintf(buf + offset, size - offset,
3177 "[%s - %s]\n", fe->dai_link->name,
3178 stream ? "Capture" : "Playback");
3180 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
3181 dpcm_state_string(fe->dpcm[stream].state));
3183 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3184 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3185 offset += scnprintf(buf + offset, size - offset,
3187 "Format = %s, Channels = %d, Rate = %d\n",
3188 snd_pcm_format_name(params_format(params)),
3189 params_channels(params),
3190 params_rate(params));
3193 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
3195 if (list_empty(&fe->dpcm[stream].be_clients)) {
3196 offset += scnprintf(buf + offset, size - offset,
3197 " No active DSP links\n");
3201 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3202 for_each_dpcm_be(fe, stream, dpcm) {
3203 struct snd_soc_pcm_runtime *be = dpcm->be;
3204 params = &dpcm->hw_params;
3206 offset += scnprintf(buf + offset, size - offset,
3207 "- %s\n", be->dai_link->name);
3209 offset += scnprintf(buf + offset, size - offset,
3211 dpcm_state_string(be->dpcm[stream].state));
3213 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3214 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3215 offset += scnprintf(buf + offset, size - offset,
3216 " Hardware Params: "
3217 "Format = %s, Channels = %d, Rate = %d\n",
3218 snd_pcm_format_name(params_format(params)),
3219 params_channels(params),
3220 params_rate(params));
3222 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3227 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3228 size_t count, loff_t *ppos)
3230 struct snd_soc_pcm_runtime *fe = file->private_data;
3231 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3234 buf = kmalloc(out_count, GFP_KERNEL);
3238 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3239 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3240 buf + offset, out_count - offset);
3242 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3243 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3244 buf + offset, out_count - offset);
3246 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3252 static const struct file_operations dpcm_state_fops = {
3253 .open = simple_open,
3254 .read = dpcm_state_read_file,
3255 .llseek = default_llseek,
3258 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3263 if (!rtd->dai_link->dynamic)
3266 if (!rtd->card->debugfs_card_root)
3269 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3270 rtd->card->debugfs_card_root);
3272 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3273 rtd, &dpcm_state_fops);