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);
880 if (rtd->dai_link->ops->hw_params) {
881 ret = rtd->dai_link->ops->hw_params(substream, params);
883 dev_err(rtd->card->dev, "ASoC: machine hw_params"
884 " failed: %d\n", ret);
889 for_each_rtd_codec_dai(rtd, i, codec_dai) {
890 struct snd_pcm_hw_params codec_params;
893 * Skip CODECs which don't support the current stream type,
894 * the idea being that if a CODEC is not used for the currently
895 * set up transfer direction, it should not need to be
896 * configured, especially since the configuration used might
897 * not even be supported by that CODEC. There may be cases
898 * however where a CODEC needs to be set up although it is
899 * actually not being used for the transfer, e.g. if a
900 * capture-only CODEC is acting as an LRCLK and/or BCLK master
901 * for the DAI link including a playback-only CODEC.
902 * If this becomes necessary, we will have to augment the
903 * machine driver setup with information on how to act, so
904 * we can do the right thing here.
906 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
909 /* copy params for each codec */
910 codec_params = *params;
912 /* fixup params based on TDM slot masks */
913 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
915 soc_pcm_codec_params_fixup(&codec_params,
918 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
920 soc_pcm_codec_params_fixup(&codec_params,
923 ret = snd_soc_dai_hw_params(codec_dai, substream,
928 codec_dai->rate = params_rate(&codec_params);
929 codec_dai->channels = params_channels(&codec_params);
930 codec_dai->sample_bits = snd_pcm_format_physical_width(
931 params_format(&codec_params));
933 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
936 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
940 /* store the parameters for each DAIs */
941 cpu_dai->rate = params_rate(params);
942 cpu_dai->channels = params_channels(params);
943 cpu_dai->sample_bits =
944 snd_pcm_format_physical_width(params_format(params));
946 snd_soc_dapm_update_dai(substream, params, cpu_dai);
948 for_each_rtdcom(rtd, rtdcom) {
949 component = rtdcom->component;
951 ret = snd_soc_component_hw_params(component, substream, params);
953 dev_err(component->dev,
954 "ASoC: %s hw params failed: %d\n",
955 component->name, ret);
961 ret = soc_pcm_params_symmetry(substream, params);
965 mutex_unlock(&rtd->card->pcm_mutex);
969 soc_pcm_components_hw_free(substream, component);
971 snd_soc_dai_hw_free(cpu_dai, substream);
978 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
979 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
982 snd_soc_dai_hw_free(codec_dai, substream);
986 if (rtd->dai_link->ops->hw_free)
987 rtd->dai_link->ops->hw_free(substream);
989 mutex_unlock(&rtd->card->pcm_mutex);
994 * Frees resources allocated by hw_params, can be called multiple times
996 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
998 struct snd_soc_pcm_runtime *rtd = substream->private_data;
999 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1000 struct snd_soc_dai *codec_dai;
1001 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1004 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
1006 /* clear the corresponding DAIs parameters when going to be inactive */
1007 if (cpu_dai->active == 1) {
1009 cpu_dai->channels = 0;
1010 cpu_dai->sample_bits = 0;
1013 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1014 if (codec_dai->active == 1) {
1015 codec_dai->rate = 0;
1016 codec_dai->channels = 0;
1017 codec_dai->sample_bits = 0;
1021 /* apply codec digital mute */
1022 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1023 if ((playback && codec_dai->playback_active == 1) ||
1024 (!playback && codec_dai->capture_active == 1))
1025 snd_soc_dai_digital_mute(codec_dai, 1,
1029 /* free any machine hw params */
1030 if (rtd->dai_link->ops->hw_free)
1031 rtd->dai_link->ops->hw_free(substream);
1033 /* free any component resources */
1034 soc_pcm_components_hw_free(substream, NULL);
1036 /* now free hw params for the DAIs */
1037 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1038 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1041 snd_soc_dai_hw_free(codec_dai, substream);
1044 snd_soc_dai_hw_free(cpu_dai, substream);
1046 mutex_unlock(&rtd->card->pcm_mutex);
1050 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1052 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1053 struct snd_soc_component *component;
1054 struct snd_soc_rtdcom_list *rtdcom;
1055 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1056 struct snd_soc_dai *codec_dai;
1059 if (rtd->dai_link->ops->trigger) {
1060 ret = rtd->dai_link->ops->trigger(substream, cmd);
1065 for_each_rtdcom(rtd, rtdcom) {
1066 component = rtdcom->component;
1068 ret = snd_soc_component_trigger(component, substream, cmd);
1073 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1077 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1078 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1086 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1088 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1089 struct snd_soc_component *component;
1090 struct snd_soc_rtdcom_list *rtdcom;
1091 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1092 struct snd_soc_dai *codec_dai;
1095 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1096 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1101 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1105 for_each_rtdcom(rtd, rtdcom) {
1106 component = rtdcom->component;
1108 ret = snd_soc_component_trigger(component, substream, cmd);
1113 if (rtd->dai_link->ops->trigger) {
1114 ret = rtd->dai_link->ops->trigger(substream, cmd);
1122 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1127 case SNDRV_PCM_TRIGGER_START:
1128 case SNDRV_PCM_TRIGGER_RESUME:
1129 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1130 ret = soc_pcm_trigger_start(substream, cmd);
1132 case SNDRV_PCM_TRIGGER_STOP:
1133 case SNDRV_PCM_TRIGGER_SUSPEND:
1134 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1135 ret = soc_pcm_trigger_stop(substream, cmd);
1144 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1147 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1148 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1149 struct snd_soc_dai *codec_dai;
1152 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1153 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1158 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1165 * soc level wrapper for pointer callback
1166 * If cpu_dai, codec_dai, component driver has the delay callback, then
1167 * the runtime->delay will be updated accordingly.
1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1171 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1173 struct snd_soc_dai *codec_dai;
1174 struct snd_pcm_runtime *runtime = substream->runtime;
1175 snd_pcm_uframes_t offset = 0;
1176 snd_pcm_sframes_t delay = 0;
1177 snd_pcm_sframes_t codec_delay = 0;
1180 /* clearing the previous total delay */
1183 offset = snd_soc_pcm_component_pointer(substream);
1185 /* base delay if assigned in pointer callback */
1186 delay = runtime->delay;
1188 delay += snd_soc_dai_delay(cpu_dai, substream);
1190 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1191 codec_delay = max(codec_delay,
1192 snd_soc_dai_delay(codec_dai, substream));
1194 delay += codec_delay;
1196 runtime->delay = delay;
1201 /* connect a FE and BE */
1202 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1203 struct snd_soc_pcm_runtime *be, int stream)
1205 struct snd_soc_dpcm *dpcm;
1206 unsigned long flags;
1208 /* only add new dpcms */
1209 for_each_dpcm_be(fe, stream, dpcm) {
1210 if (dpcm->be == be && dpcm->fe == fe)
1214 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1220 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1221 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1222 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1223 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1224 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1225 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1227 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1228 stream ? "capture" : "playback", fe->dai_link->name,
1229 stream ? "<-" : "->", be->dai_link->name);
1231 #ifdef CONFIG_DEBUG_FS
1232 dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1233 fe->debugfs_dpcm_root);
1234 debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1239 /* reparent a BE onto another FE */
1240 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1241 struct snd_soc_pcm_runtime *be, int stream)
1243 struct snd_soc_dpcm *dpcm;
1244 struct snd_pcm_substream *fe_substream, *be_substream;
1246 /* reparent if BE is connected to other FEs */
1247 if (!be->dpcm[stream].users)
1250 be_substream = snd_soc_dpcm_get_substream(be, stream);
1252 for_each_dpcm_fe(be, stream, dpcm) {
1256 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1257 stream ? "capture" : "playback",
1258 dpcm->fe->dai_link->name,
1259 stream ? "<-" : "->", dpcm->be->dai_link->name);
1261 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1262 be_substream->runtime = fe_substream->runtime;
1267 /* disconnect a BE and FE */
1268 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1270 struct snd_soc_dpcm *dpcm, *d;
1271 unsigned long flags;
1273 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1274 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1275 stream ? "capture" : "playback",
1276 dpcm->be->dai_link->name);
1278 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1281 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1282 stream ? "capture" : "playback", fe->dai_link->name,
1283 stream ? "<-" : "->", dpcm->be->dai_link->name);
1285 /* BEs still alive need new FE */
1286 dpcm_be_reparent(fe, dpcm->be, stream);
1288 #ifdef CONFIG_DEBUG_FS
1289 debugfs_remove_recursive(dpcm->debugfs_state);
1291 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1292 list_del(&dpcm->list_be);
1293 list_del(&dpcm->list_fe);
1294 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1299 /* get BE for DAI widget and stream */
1300 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1301 struct snd_soc_dapm_widget *widget, int stream)
1303 struct snd_soc_pcm_runtime *be;
1304 struct snd_soc_dai *dai;
1307 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1309 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1310 for_each_card_rtds(card, be) {
1312 if (!be->dai_link->no_pcm)
1315 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1316 be->cpu_dai->playback_widget ?
1317 be->cpu_dai->playback_widget->name : "(not set)");
1319 if (be->cpu_dai->playback_widget == widget)
1322 for_each_rtd_codec_dai(be, i, dai) {
1323 if (dai->playback_widget == widget)
1329 for_each_card_rtds(card, be) {
1331 if (!be->dai_link->no_pcm)
1334 dev_dbg(card->dev, "ASoC: try BE %s\n",
1335 be->cpu_dai->capture_widget ?
1336 be->cpu_dai->capture_widget->name : "(not set)");
1338 if (be->cpu_dai->capture_widget == widget)
1341 for_each_rtd_codec_dai(be, i, dai) {
1342 if (dai->capture_widget == widget)
1348 /* dai link name and stream name set correctly ? */
1349 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1350 stream ? "capture" : "playback", widget->name);
1354 static inline struct snd_soc_dapm_widget *
1355 dai_get_widget(struct snd_soc_dai *dai, int stream)
1357 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1358 return dai->playback_widget;
1360 return dai->capture_widget;
1363 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1364 struct snd_soc_dapm_widget *widget)
1368 for (i = 0; i < list->num_widgets; i++) {
1369 if (widget == list->widgets[i])
1376 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1377 enum snd_soc_dapm_direction dir)
1379 struct snd_soc_card *card = widget->dapm->card;
1380 struct snd_soc_pcm_runtime *rtd;
1381 struct snd_soc_dai *dai;
1384 if (dir == SND_SOC_DAPM_DIR_OUT) {
1385 for_each_card_rtds(card, rtd) {
1386 if (!rtd->dai_link->no_pcm)
1389 if (rtd->cpu_dai->playback_widget == widget)
1392 for_each_rtd_codec_dai(rtd, i, dai) {
1393 if (dai->playback_widget == widget)
1397 } else { /* SND_SOC_DAPM_DIR_IN */
1398 for_each_card_rtds(card, rtd) {
1399 if (!rtd->dai_link->no_pcm)
1402 if (rtd->cpu_dai->capture_widget == widget)
1405 for_each_rtd_codec_dai(rtd, i, dai) {
1406 if (dai->capture_widget == widget)
1415 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1416 int stream, struct snd_soc_dapm_widget_list **list)
1418 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1421 /* get number of valid DAI paths and their widgets */
1422 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1423 dpcm_end_walk_at_be);
1425 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1426 stream ? "capture" : "playback");
1431 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1432 struct snd_soc_dapm_widget_list **list_)
1434 struct snd_soc_dpcm *dpcm;
1435 struct snd_soc_dapm_widget_list *list = *list_;
1436 struct snd_soc_dapm_widget *widget;
1437 struct snd_soc_dai *dai;
1440 /* Destroy any old FE <--> BE connections */
1441 for_each_dpcm_be(fe, stream, dpcm) {
1444 /* is there a valid CPU DAI widget for this BE */
1445 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1447 /* prune the BE if it's no longer in our active list */
1448 if (widget && widget_in_list(list, widget))
1451 /* is there a valid CODEC DAI widget for this BE */
1452 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1453 widget = dai_get_widget(dai, stream);
1455 /* prune the BE if it's no longer in our active list */
1456 if (widget && widget_in_list(list, widget))
1460 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1461 stream ? "capture" : "playback",
1462 dpcm->be->dai_link->name, fe->dai_link->name);
1463 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1464 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1468 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1472 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1473 struct snd_soc_dapm_widget_list **list_)
1475 struct snd_soc_card *card = fe->card;
1476 struct snd_soc_dapm_widget_list *list = *list_;
1477 struct snd_soc_pcm_runtime *be;
1478 int i, new = 0, err;
1480 /* Create any new FE <--> BE connections */
1481 for (i = 0; i < list->num_widgets; i++) {
1483 switch (list->widgets[i]->id) {
1484 case snd_soc_dapm_dai_in:
1485 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1488 case snd_soc_dapm_dai_out:
1489 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1496 /* is there a valid BE rtd for this widget */
1497 be = dpcm_get_be(card, list->widgets[i], stream);
1499 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1500 list->widgets[i]->name);
1504 /* make sure BE is a real BE */
1505 if (!be->dai_link->no_pcm)
1508 /* don't connect if FE is not running */
1509 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1512 /* newly connected FE and BE */
1513 err = dpcm_be_connect(fe, be, stream);
1515 dev_err(fe->dev, "ASoC: can't connect %s\n",
1516 list->widgets[i]->name);
1518 } else if (err == 0) /* already connected */
1522 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1526 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1531 * Find the corresponding BE DAIs that source or sink audio to this
1534 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1535 int stream, struct snd_soc_dapm_widget_list **list, int new)
1538 return dpcm_add_paths(fe, stream, list);
1540 return dpcm_prune_paths(fe, stream, list);
1543 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1545 struct snd_soc_dpcm *dpcm;
1546 unsigned long flags;
1548 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1549 for_each_dpcm_be(fe, stream, dpcm)
1550 dpcm->be->dpcm[stream].runtime_update =
1551 SND_SOC_DPCM_UPDATE_NO;
1552 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1555 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1558 struct snd_soc_dpcm *dpcm;
1560 /* disable any enabled and non active backends */
1561 for_each_dpcm_be(fe, stream, dpcm) {
1563 struct snd_soc_pcm_runtime *be = dpcm->be;
1564 struct snd_pcm_substream *be_substream =
1565 snd_soc_dpcm_get_substream(be, stream);
1567 if (be->dpcm[stream].users == 0)
1568 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1569 stream ? "capture" : "playback",
1570 be->dpcm[stream].state);
1572 if (--be->dpcm[stream].users != 0)
1575 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1578 soc_pcm_close(be_substream);
1579 be_substream->runtime = NULL;
1580 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1584 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1586 struct snd_soc_dpcm *dpcm;
1589 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1590 for_each_dpcm_be(fe, stream, dpcm) {
1592 struct snd_soc_pcm_runtime *be = dpcm->be;
1593 struct snd_pcm_substream *be_substream =
1594 snd_soc_dpcm_get_substream(be, stream);
1596 if (!be_substream) {
1597 dev_err(be->dev, "ASoC: no backend %s stream\n",
1598 stream ? "capture" : "playback");
1602 /* is this op for this BE ? */
1603 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1606 /* first time the dpcm is open ? */
1607 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1608 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1609 stream ? "capture" : "playback",
1610 be->dpcm[stream].state);
1612 if (be->dpcm[stream].users++ != 0)
1615 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1616 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1619 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1620 stream ? "capture" : "playback", be->dai_link->name);
1622 be_substream->runtime = be->dpcm[stream].runtime;
1623 err = soc_pcm_open(be_substream);
1625 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1626 be->dpcm[stream].users--;
1627 if (be->dpcm[stream].users < 0)
1628 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1629 stream ? "capture" : "playback",
1630 be->dpcm[stream].state);
1632 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1636 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1643 /* disable any enabled and non active backends */
1644 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1645 struct snd_soc_pcm_runtime *be = dpcm->be;
1646 struct snd_pcm_substream *be_substream =
1647 snd_soc_dpcm_get_substream(be, stream);
1649 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1652 if (be->dpcm[stream].users == 0)
1653 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1654 stream ? "capture" : "playback",
1655 be->dpcm[stream].state);
1657 if (--be->dpcm[stream].users != 0)
1660 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1663 soc_pcm_close(be_substream);
1664 be_substream->runtime = NULL;
1665 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1671 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1672 struct snd_soc_pcm_stream *stream)
1674 runtime->hw.rate_min = stream->rate_min;
1675 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1676 runtime->hw.channels_min = stream->channels_min;
1677 runtime->hw.channels_max = stream->channels_max;
1678 if (runtime->hw.formats)
1679 runtime->hw.formats &= stream->formats;
1681 runtime->hw.formats = stream->formats;
1682 runtime->hw.rates = stream->rates;
1685 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1688 struct snd_soc_pcm_runtime *fe = substream->private_data;
1689 struct snd_soc_dpcm *dpcm;
1690 struct snd_soc_dai *dai;
1691 int stream = substream->stream;
1693 if (!fe->dai_link->dpcm_merged_format)
1697 * It returns merged BE codec format
1698 * if FE want to use it (= dpcm_merged_format)
1701 for_each_dpcm_be(fe, stream, dpcm) {
1702 struct snd_soc_pcm_runtime *be = dpcm->be;
1703 struct snd_soc_dai_driver *codec_dai_drv;
1704 struct snd_soc_pcm_stream *codec_stream;
1707 for_each_rtd_codec_dai(be, i, dai) {
1709 * Skip CODECs which don't support the current stream
1710 * type. See soc_pcm_init_runtime_hw() for more details
1712 if (!snd_soc_dai_stream_valid(dai, stream))
1715 codec_dai_drv = dai->driver;
1716 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1717 codec_stream = &codec_dai_drv->playback;
1719 codec_stream = &codec_dai_drv->capture;
1721 *formats &= codec_stream->formats;
1726 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1727 unsigned int *channels_min,
1728 unsigned int *channels_max)
1730 struct snd_soc_pcm_runtime *fe = substream->private_data;
1731 struct snd_soc_dpcm *dpcm;
1732 int stream = substream->stream;
1734 if (!fe->dai_link->dpcm_merged_chan)
1738 * It returns merged BE codec channel;
1739 * if FE want to use it (= dpcm_merged_chan)
1742 for_each_dpcm_be(fe, stream, dpcm) {
1743 struct snd_soc_pcm_runtime *be = dpcm->be;
1744 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1745 struct snd_soc_dai_driver *codec_dai_drv;
1746 struct snd_soc_pcm_stream *codec_stream;
1747 struct snd_soc_pcm_stream *cpu_stream;
1749 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1750 cpu_stream = &cpu_dai_drv->playback;
1752 cpu_stream = &cpu_dai_drv->capture;
1754 *channels_min = max(*channels_min, cpu_stream->channels_min);
1755 *channels_max = min(*channels_max, cpu_stream->channels_max);
1758 * chan min/max cannot be enforced if there are multiple CODEC
1759 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1761 if (be->num_codecs == 1) {
1762 codec_dai_drv = be->codec_dais[0]->driver;
1764 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1765 codec_stream = &codec_dai_drv->playback;
1767 codec_stream = &codec_dai_drv->capture;
1769 *channels_min = max(*channels_min,
1770 codec_stream->channels_min);
1771 *channels_max = min(*channels_max,
1772 codec_stream->channels_max);
1777 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1778 unsigned int *rates,
1779 unsigned int *rate_min,
1780 unsigned int *rate_max)
1782 struct snd_soc_pcm_runtime *fe = substream->private_data;
1783 struct snd_soc_dpcm *dpcm;
1784 int stream = substream->stream;
1786 if (!fe->dai_link->dpcm_merged_rate)
1790 * It returns merged BE codec channel;
1791 * if FE want to use it (= dpcm_merged_chan)
1794 for_each_dpcm_be(fe, stream, dpcm) {
1795 struct snd_soc_pcm_runtime *be = dpcm->be;
1796 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1797 struct snd_soc_dai_driver *codec_dai_drv;
1798 struct snd_soc_pcm_stream *codec_stream;
1799 struct snd_soc_pcm_stream *cpu_stream;
1800 struct snd_soc_dai *dai;
1803 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1804 cpu_stream = &cpu_dai_drv->playback;
1806 cpu_stream = &cpu_dai_drv->capture;
1808 *rate_min = max(*rate_min, cpu_stream->rate_min);
1809 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1810 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1812 for_each_rtd_codec_dai(be, i, dai) {
1814 * Skip CODECs which don't support the current stream
1815 * type. See soc_pcm_init_runtime_hw() for more details
1817 if (!snd_soc_dai_stream_valid(dai, stream))
1820 codec_dai_drv = dai->driver;
1821 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1822 codec_stream = &codec_dai_drv->playback;
1824 codec_stream = &codec_dai_drv->capture;
1826 *rate_min = max(*rate_min, codec_stream->rate_min);
1827 *rate_max = min_not_zero(*rate_max,
1828 codec_stream->rate_max);
1829 *rates = snd_pcm_rate_mask_intersect(*rates,
1830 codec_stream->rates);
1835 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1837 struct snd_pcm_runtime *runtime = substream->runtime;
1838 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1839 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1840 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1843 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1845 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1847 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1848 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1849 &runtime->hw.channels_max);
1850 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1851 &runtime->hw.rate_min, &runtime->hw.rate_max);
1854 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1856 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1857 * for avoiding the race with trigger callback.
1858 * If the state is unset and a trigger is pending while the previous operation,
1859 * process the pending trigger action here.
1861 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1862 int stream, enum snd_soc_dpcm_update state)
1864 struct snd_pcm_substream *substream =
1865 snd_soc_dpcm_get_substream(fe, stream);
1867 snd_pcm_stream_lock_irq(substream);
1868 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1869 dpcm_fe_dai_do_trigger(substream,
1870 fe->dpcm[stream].trigger_pending - 1);
1871 fe->dpcm[stream].trigger_pending = 0;
1873 fe->dpcm[stream].runtime_update = state;
1874 snd_pcm_stream_unlock_irq(substream);
1877 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1880 struct snd_soc_dpcm *dpcm;
1881 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1882 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1885 /* apply symmetry for FE */
1886 if (soc_pcm_has_symmetry(fe_substream))
1887 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1889 /* Symmetry only applies if we've got an active stream. */
1890 if (fe_cpu_dai->active) {
1891 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1896 /* apply symmetry for BE */
1897 for_each_dpcm_be(fe, stream, dpcm) {
1898 struct snd_soc_pcm_runtime *be = dpcm->be;
1899 struct snd_pcm_substream *be_substream =
1900 snd_soc_dpcm_get_substream(be, stream);
1901 struct snd_soc_pcm_runtime *rtd;
1902 struct snd_soc_dai *codec_dai;
1905 /* A backend may not have the requested substream */
1909 rtd = be_substream->private_data;
1910 if (rtd->dai_link->be_hw_params_fixup)
1913 if (soc_pcm_has_symmetry(be_substream))
1914 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1916 /* Symmetry only applies if we've got an active stream. */
1917 if (rtd->cpu_dai->active) {
1918 err = soc_pcm_apply_symmetry(fe_substream,
1924 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1925 if (codec_dai->active) {
1926 err = soc_pcm_apply_symmetry(fe_substream,
1937 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1939 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1940 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1941 int stream = fe_substream->stream, ret = 0;
1943 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1945 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1947 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1951 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1953 /* start the DAI frontend */
1954 ret = soc_pcm_open(fe_substream);
1956 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1960 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1962 dpcm_set_fe_runtime(fe_substream);
1963 snd_pcm_limit_hw_rates(runtime);
1965 ret = dpcm_apply_symmetry(fe_substream, stream);
1967 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1972 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1976 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1978 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1982 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1984 struct snd_soc_dpcm *dpcm;
1986 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1987 for_each_dpcm_be(fe, stream, dpcm) {
1989 struct snd_soc_pcm_runtime *be = dpcm->be;
1990 struct snd_pcm_substream *be_substream =
1991 snd_soc_dpcm_get_substream(be, stream);
1993 /* is this op for this BE ? */
1994 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1997 if (be->dpcm[stream].users == 0)
1998 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1999 stream ? "capture" : "playback",
2000 be->dpcm[stream].state);
2002 if (--be->dpcm[stream].users != 0)
2005 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2006 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2007 soc_pcm_hw_free(be_substream);
2008 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2011 dev_dbg(be->dev, "ASoC: close BE %s\n",
2012 be->dai_link->name);
2014 soc_pcm_close(be_substream);
2015 be_substream->runtime = NULL;
2017 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2022 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2024 struct snd_soc_pcm_runtime *fe = substream->private_data;
2025 int stream = substream->stream;
2027 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2029 /* shutdown the BEs */
2030 dpcm_be_dai_shutdown(fe, substream->stream);
2032 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2034 /* now shutdown the frontend */
2035 soc_pcm_close(substream);
2037 /* run the stream event for each BE */
2038 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2040 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2041 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2045 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2047 struct snd_soc_dpcm *dpcm;
2049 /* only hw_params backends that are either sinks or sources
2050 * to this frontend DAI */
2051 for_each_dpcm_be(fe, stream, dpcm) {
2053 struct snd_soc_pcm_runtime *be = dpcm->be;
2054 struct snd_pcm_substream *be_substream =
2055 snd_soc_dpcm_get_substream(be, stream);
2057 /* is this op for this BE ? */
2058 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2061 /* only free hw when no longer used - check all FEs */
2062 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2065 /* do not free hw if this BE is used by other FE */
2066 if (be->dpcm[stream].users > 1)
2069 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2070 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2072 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2073 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2074 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2077 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2078 be->dai_link->name);
2080 soc_pcm_hw_free(be_substream);
2082 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2088 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2090 struct snd_soc_pcm_runtime *fe = substream->private_data;
2091 int err, stream = substream->stream;
2093 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2094 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2096 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2098 /* call hw_free on the frontend */
2099 err = soc_pcm_hw_free(substream);
2101 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2102 fe->dai_link->name);
2104 /* only hw_params backends that are either sinks or sources
2105 * to this frontend DAI */
2106 err = dpcm_be_dai_hw_free(fe, stream);
2108 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2109 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2111 mutex_unlock(&fe->card->mutex);
2115 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2117 struct snd_soc_dpcm *dpcm;
2120 for_each_dpcm_be(fe, stream, dpcm) {
2122 struct snd_soc_pcm_runtime *be = dpcm->be;
2123 struct snd_pcm_substream *be_substream =
2124 snd_soc_dpcm_get_substream(be, stream);
2126 /* is this op for this BE ? */
2127 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2130 /* copy params for each dpcm */
2131 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2132 sizeof(struct snd_pcm_hw_params));
2134 /* perform any hw_params fixups */
2135 if (be->dai_link->be_hw_params_fixup) {
2136 ret = be->dai_link->be_hw_params_fixup(be,
2140 "ASoC: hw_params BE fixup failed %d\n",
2146 /* copy the fixed-up hw params for BE dai */
2147 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2148 sizeof(struct snd_pcm_hw_params));
2150 /* only allow hw_params() if no connected FEs are running */
2151 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2154 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2156 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2159 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2160 be->dai_link->name);
2162 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2164 dev_err(dpcm->be->dev,
2165 "ASoC: hw_params BE failed %d\n", ret);
2169 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2174 /* disable any enabled and non active backends */
2175 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2176 struct snd_soc_pcm_runtime *be = dpcm->be;
2177 struct snd_pcm_substream *be_substream =
2178 snd_soc_dpcm_get_substream(be, stream);
2180 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2183 /* only allow hw_free() if no connected FEs are running */
2184 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2187 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2188 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2189 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2190 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2193 soc_pcm_hw_free(be_substream);
2199 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2200 struct snd_pcm_hw_params *params)
2202 struct snd_soc_pcm_runtime *fe = substream->private_data;
2203 int ret, stream = substream->stream;
2205 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2206 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2208 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2209 sizeof(struct snd_pcm_hw_params));
2210 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2212 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2216 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2217 fe->dai_link->name, params_rate(params),
2218 params_channels(params), params_format(params));
2220 /* call hw_params on the frontend */
2221 ret = soc_pcm_hw_params(substream, params);
2223 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2224 dpcm_be_dai_hw_free(fe, stream);
2226 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2229 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2230 mutex_unlock(&fe->card->mutex);
2234 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2235 struct snd_pcm_substream *substream, int cmd)
2239 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2240 dpcm->be->dai_link->name, cmd);
2242 ret = soc_pcm_trigger(substream, cmd);
2244 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2249 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2252 struct snd_soc_dpcm *dpcm;
2255 for_each_dpcm_be(fe, stream, dpcm) {
2257 struct snd_soc_pcm_runtime *be = dpcm->be;
2258 struct snd_pcm_substream *be_substream =
2259 snd_soc_dpcm_get_substream(be, stream);
2261 /* is this op for this BE ? */
2262 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2266 case SNDRV_PCM_TRIGGER_START:
2267 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2268 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2271 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2275 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2277 case SNDRV_PCM_TRIGGER_RESUME:
2278 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2281 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2285 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2288 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2291 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2295 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2297 case SNDRV_PCM_TRIGGER_STOP:
2298 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2301 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2304 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2308 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2310 case SNDRV_PCM_TRIGGER_SUSPEND:
2311 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2314 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2317 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2321 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2323 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2324 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2327 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2330 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2334 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2341 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2343 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2345 struct snd_soc_pcm_runtime *fe = substream->private_data;
2346 int stream = substream->stream, ret;
2347 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2349 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2352 case SND_SOC_DPCM_TRIGGER_PRE:
2353 /* call trigger on the frontend before the backend. */
2355 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2356 fe->dai_link->name, cmd);
2358 ret = soc_pcm_trigger(substream, cmd);
2360 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2364 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2366 case SND_SOC_DPCM_TRIGGER_POST:
2367 /* call trigger on the frontend after the backend. */
2369 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2371 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2375 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2376 fe->dai_link->name, cmd);
2378 ret = soc_pcm_trigger(substream, cmd);
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);
2388 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2393 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2394 fe->dai_link->name);
2400 case SNDRV_PCM_TRIGGER_START:
2401 case SNDRV_PCM_TRIGGER_RESUME:
2402 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2403 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2405 case SNDRV_PCM_TRIGGER_STOP:
2406 case SNDRV_PCM_TRIGGER_SUSPEND:
2407 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2409 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2410 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2415 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2419 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2421 struct snd_soc_pcm_runtime *fe = substream->private_data;
2422 int stream = substream->stream;
2424 /* if FE's runtime_update is already set, we're in race;
2425 * process this trigger later at exit
2427 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2428 fe->dpcm[stream].trigger_pending = cmd + 1;
2429 return 0; /* delayed, assuming it's successful */
2432 /* we're alone, let's trigger */
2433 return dpcm_fe_dai_do_trigger(substream, cmd);
2436 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2438 struct snd_soc_dpcm *dpcm;
2441 for_each_dpcm_be(fe, stream, dpcm) {
2443 struct snd_soc_pcm_runtime *be = dpcm->be;
2444 struct snd_pcm_substream *be_substream =
2445 snd_soc_dpcm_get_substream(be, stream);
2447 /* is this op for this BE ? */
2448 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2451 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2452 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2453 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2454 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2457 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2458 be->dai_link->name);
2460 ret = soc_pcm_prepare(be_substream);
2462 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2467 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2472 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2474 struct snd_soc_pcm_runtime *fe = substream->private_data;
2475 int stream = substream->stream, ret = 0;
2477 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2479 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2481 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2483 /* there is no point preparing this FE if there are no BEs */
2484 if (list_empty(&fe->dpcm[stream].be_clients)) {
2485 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2486 fe->dai_link->name);
2491 ret = dpcm_be_dai_prepare(fe, substream->stream);
2495 /* call prepare on the frontend */
2496 ret = soc_pcm_prepare(substream);
2498 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2499 fe->dai_link->name);
2503 /* run the stream event for each BE */
2504 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2505 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2508 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2509 mutex_unlock(&fe->card->mutex);
2514 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2516 struct snd_pcm_substream *substream =
2517 snd_soc_dpcm_get_substream(fe, stream);
2518 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2521 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2522 stream ? "capture" : "playback", fe->dai_link->name);
2524 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2525 /* call bespoke trigger - FE takes care of all BE triggers */
2526 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2527 fe->dai_link->name);
2529 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2531 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2533 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2534 fe->dai_link->name);
2536 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2538 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2541 err = dpcm_be_dai_hw_free(fe, stream);
2543 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2545 err = dpcm_be_dai_shutdown(fe, stream);
2547 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2549 /* run the stream event for each BE */
2550 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2555 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2557 struct snd_pcm_substream *substream =
2558 snd_soc_dpcm_get_substream(fe, stream);
2559 struct snd_soc_dpcm *dpcm;
2560 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2562 unsigned long flags;
2564 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2565 stream ? "capture" : "playback", fe->dai_link->name);
2567 /* Only start the BE if the FE is ready */
2568 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2569 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2572 /* startup must always be called for new BEs */
2573 ret = dpcm_be_dai_startup(fe, stream);
2577 /* keep going if FE state is > open */
2578 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2581 ret = dpcm_be_dai_hw_params(fe, stream);
2585 /* keep going if FE state is > hw_params */
2586 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2590 ret = dpcm_be_dai_prepare(fe, stream);
2594 /* run the stream event for each BE */
2595 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2597 /* keep going if FE state is > prepare */
2598 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2599 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2602 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2603 /* call trigger on the frontend - FE takes care of all BE triggers */
2604 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2605 fe->dai_link->name);
2607 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2609 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2613 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2614 fe->dai_link->name);
2616 ret = dpcm_be_dai_trigger(fe, stream,
2617 SNDRV_PCM_TRIGGER_START);
2619 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2627 dpcm_be_dai_hw_free(fe, stream);
2629 dpcm_be_dai_shutdown(fe, stream);
2631 /* disconnect any non started BEs */
2632 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2633 for_each_dpcm_be(fe, stream, dpcm) {
2634 struct snd_soc_pcm_runtime *be = dpcm->be;
2635 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2636 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2638 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2643 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2647 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2648 ret = dpcm_run_update_startup(fe, stream);
2650 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2651 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2656 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2660 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2661 ret = dpcm_run_update_shutdown(fe, stream);
2663 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2664 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2669 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2671 struct snd_soc_dapm_widget_list *list;
2674 if (!fe->dai_link->dynamic)
2677 /* only check active links */
2678 if (!fe->cpu_dai->active)
2681 /* DAPM sync will call this to update DSP paths */
2682 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2683 new ? "new" : "old", fe->dai_link->name);
2685 /* skip if FE doesn't have playback capability */
2686 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2687 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2690 /* skip if FE isn't currently playing */
2691 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2694 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2696 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2697 fe->dai_link->name, "playback");
2701 /* update any playback paths */
2702 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2705 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2707 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2709 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2710 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2713 dpcm_path_put(&list);
2716 /* skip if FE doesn't have capture capability */
2717 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2718 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2721 /* skip if FE isn't currently capturing */
2722 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2725 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2727 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2728 fe->dai_link->name, "capture");
2732 /* update any old capture paths */
2733 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2736 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2738 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2740 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2741 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2744 dpcm_path_put(&list);
2749 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2752 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2754 struct snd_soc_pcm_runtime *fe;
2757 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2758 /* shutdown all old paths first */
2759 for_each_card_rtds(card, fe) {
2760 ret = soc_dpcm_fe_runtime_update(fe, 0);
2765 /* bring new paths up */
2766 for_each_card_rtds(card, fe) {
2767 ret = soc_dpcm_fe_runtime_update(fe, 1);
2773 mutex_unlock(&card->mutex);
2776 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2778 struct snd_soc_dpcm *dpcm;
2779 struct snd_soc_dai *dai;
2781 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2783 struct snd_soc_pcm_runtime *be = dpcm->be;
2786 if (be->dai_link->ignore_suspend)
2789 for_each_rtd_codec_dai(be, i, dai) {
2790 struct snd_soc_dai_driver *drv = dai->driver;
2792 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2793 be->dai_link->name);
2795 if (drv->ops && drv->ops->digital_mute &&
2796 dai->playback_active)
2797 drv->ops->digital_mute(dai, mute);
2804 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2806 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2807 struct snd_soc_dpcm *dpcm;
2808 struct snd_soc_dapm_widget_list *list;
2810 int stream = fe_substream->stream;
2812 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2813 fe->dpcm[stream].runtime = fe_substream->runtime;
2815 ret = dpcm_path_get(fe, stream, &list);
2817 mutex_unlock(&fe->card->mutex);
2819 } else if (ret == 0) {
2820 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2821 fe->dai_link->name, stream ? "capture" : "playback");
2824 /* calculate valid and active FE <-> BE dpcms */
2825 dpcm_process_paths(fe, stream, &list, 1);
2827 ret = dpcm_fe_dai_startup(fe_substream);
2829 /* clean up all links */
2830 for_each_dpcm_be(fe, stream, dpcm)
2831 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2833 dpcm_be_disconnect(fe, stream);
2834 fe->dpcm[stream].runtime = NULL;
2837 dpcm_clear_pending_state(fe, stream);
2838 dpcm_path_put(&list);
2839 mutex_unlock(&fe->card->mutex);
2843 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2845 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2846 struct snd_soc_dpcm *dpcm;
2847 int stream = fe_substream->stream, ret;
2849 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2850 ret = dpcm_fe_dai_shutdown(fe_substream);
2852 /* mark FE's links ready to prune */
2853 for_each_dpcm_be(fe, stream, dpcm)
2854 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2856 dpcm_be_disconnect(fe, stream);
2858 fe->dpcm[stream].runtime = NULL;
2859 mutex_unlock(&fe->card->mutex);
2863 static void soc_pcm_private_free(struct snd_pcm *pcm)
2865 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2867 /* need to sync the delayed work before releasing resources */
2868 flush_delayed_work(&rtd->delayed_work);
2869 snd_soc_pcm_component_free(pcm);
2872 /* create a new pcm */
2873 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2875 struct snd_soc_dai *codec_dai;
2876 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2877 struct snd_soc_rtdcom_list *rtdcom;
2878 struct snd_pcm *pcm;
2880 int ret = 0, playback = 0, capture = 0;
2883 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2884 playback = rtd->dai_link->dpcm_playback;
2885 capture = rtd->dai_link->dpcm_capture;
2887 /* Adapt stream for codec2codec links */
2888 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2889 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2890 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2891 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2893 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2894 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2895 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2897 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2898 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2902 capture = capture && cpu_capture->channels_min;
2903 playback = playback && cpu_playback->channels_min;
2906 if (rtd->dai_link->playback_only) {
2911 if (rtd->dai_link->capture_only) {
2916 /* create the PCM */
2917 if (rtd->dai_link->params) {
2918 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2919 rtd->dai_link->stream_name);
2921 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2922 playback, capture, &pcm);
2923 } else if (rtd->dai_link->no_pcm) {
2924 snprintf(new_name, sizeof(new_name), "(%s)",
2925 rtd->dai_link->stream_name);
2927 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2928 playback, capture, &pcm);
2930 if (rtd->dai_link->dynamic)
2931 snprintf(new_name, sizeof(new_name), "%s (*)",
2932 rtd->dai_link->stream_name);
2934 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2935 rtd->dai_link->stream_name,
2936 (rtd->num_codecs > 1) ?
2937 "multicodec" : rtd->codec_dai->name, num);
2939 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2943 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2944 rtd->dai_link->name);
2947 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2949 /* DAPM dai link stream work */
2950 if (rtd->dai_link->params)
2951 INIT_DELAYED_WORK(&rtd->delayed_work,
2952 codec2codec_close_delayed_work);
2954 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2956 pcm->nonatomic = rtd->dai_link->nonatomic;
2958 pcm->private_data = rtd;
2960 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2962 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2964 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2968 /* ASoC PCM operations */
2969 if (rtd->dai_link->dynamic) {
2970 rtd->ops.open = dpcm_fe_dai_open;
2971 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2972 rtd->ops.prepare = dpcm_fe_dai_prepare;
2973 rtd->ops.trigger = dpcm_fe_dai_trigger;
2974 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2975 rtd->ops.close = dpcm_fe_dai_close;
2976 rtd->ops.pointer = soc_pcm_pointer;
2977 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2979 rtd->ops.open = soc_pcm_open;
2980 rtd->ops.hw_params = soc_pcm_hw_params;
2981 rtd->ops.prepare = soc_pcm_prepare;
2982 rtd->ops.trigger = soc_pcm_trigger;
2983 rtd->ops.hw_free = soc_pcm_hw_free;
2984 rtd->ops.close = soc_pcm_close;
2985 rtd->ops.pointer = soc_pcm_pointer;
2986 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2989 for_each_rtdcom(rtd, rtdcom) {
2990 const struct snd_soc_component_driver *drv = rtdcom->component->driver;
2993 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2995 rtd->ops.page = snd_soc_pcm_component_page;
2997 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3001 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3004 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3006 ret = snd_soc_pcm_component_new(pcm);
3008 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3012 pcm->private_free = soc_pcm_private_free;
3013 pcm->no_device_suspend = true;
3015 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3016 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3021 /* is the current PCM operation for this FE ? */
3022 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3024 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3028 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3030 /* is the current PCM operation for this BE ? */
3031 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3032 struct snd_soc_pcm_runtime *be, int stream)
3034 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3035 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3036 be->dpcm[stream].runtime_update))
3040 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3042 /* get the substream for this BE */
3043 struct snd_pcm_substream *
3044 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3046 return be->pcm->streams[stream].substream;
3048 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3050 /* get the BE runtime state */
3051 enum snd_soc_dpcm_state
3052 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3054 return be->dpcm[stream].state;
3056 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3058 /* set the BE runtime state */
3059 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3060 int stream, enum snd_soc_dpcm_state state)
3062 be->dpcm[stream].state = state;
3064 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3067 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3068 * are not running, paused or suspended for the specified stream direction.
3070 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3071 struct snd_soc_pcm_runtime *be, int stream)
3073 struct snd_soc_dpcm *dpcm;
3076 unsigned long flags;
3078 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3079 for_each_dpcm_fe(be, stream, dpcm) {
3084 state = dpcm->fe->dpcm[stream].state;
3085 if (state == SND_SOC_DPCM_STATE_START ||
3086 state == SND_SOC_DPCM_STATE_PAUSED ||
3087 state == SND_SOC_DPCM_STATE_SUSPEND) {
3092 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3094 /* it's safe to free/stop this BE DAI */
3097 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3100 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3101 * running, paused or suspended for the specified stream direction.
3103 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3104 struct snd_soc_pcm_runtime *be, int stream)
3106 struct snd_soc_dpcm *dpcm;
3109 unsigned long flags;
3111 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3112 for_each_dpcm_fe(be, stream, dpcm) {
3117 state = dpcm->fe->dpcm[stream].state;
3118 if (state == SND_SOC_DPCM_STATE_START ||
3119 state == SND_SOC_DPCM_STATE_PAUSED ||
3120 state == SND_SOC_DPCM_STATE_SUSPEND ||
3121 state == SND_SOC_DPCM_STATE_PREPARE) {
3126 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3128 /* it's safe to change hw_params */
3131 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3133 #ifdef CONFIG_DEBUG_FS
3134 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3137 case SND_SOC_DPCM_STATE_NEW:
3139 case SND_SOC_DPCM_STATE_OPEN:
3141 case SND_SOC_DPCM_STATE_HW_PARAMS:
3143 case SND_SOC_DPCM_STATE_PREPARE:
3145 case SND_SOC_DPCM_STATE_START:
3147 case SND_SOC_DPCM_STATE_STOP:
3149 case SND_SOC_DPCM_STATE_SUSPEND:
3151 case SND_SOC_DPCM_STATE_PAUSED:
3153 case SND_SOC_DPCM_STATE_HW_FREE:
3155 case SND_SOC_DPCM_STATE_CLOSE:
3162 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3163 int stream, char *buf, size_t size)
3165 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3166 struct snd_soc_dpcm *dpcm;
3168 unsigned long flags;
3171 offset += snprintf(buf + offset, size - offset,
3172 "[%s - %s]\n", fe->dai_link->name,
3173 stream ? "Capture" : "Playback");
3175 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3176 dpcm_state_string(fe->dpcm[stream].state));
3178 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3179 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3180 offset += snprintf(buf + offset, size - offset,
3182 "Format = %s, Channels = %d, Rate = %d\n",
3183 snd_pcm_format_name(params_format(params)),
3184 params_channels(params),
3185 params_rate(params));
3188 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3190 if (list_empty(&fe->dpcm[stream].be_clients)) {
3191 offset += snprintf(buf + offset, size - offset,
3192 " No active DSP links\n");
3196 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3197 for_each_dpcm_be(fe, stream, dpcm) {
3198 struct snd_soc_pcm_runtime *be = dpcm->be;
3199 params = &dpcm->hw_params;
3201 offset += snprintf(buf + offset, size - offset,
3202 "- %s\n", be->dai_link->name);
3204 offset += snprintf(buf + offset, size - offset,
3206 dpcm_state_string(be->dpcm[stream].state));
3208 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3209 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3210 offset += snprintf(buf + offset, size - offset,
3211 " Hardware Params: "
3212 "Format = %s, Channels = %d, Rate = %d\n",
3213 snd_pcm_format_name(params_format(params)),
3214 params_channels(params),
3215 params_rate(params));
3217 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3222 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3223 size_t count, loff_t *ppos)
3225 struct snd_soc_pcm_runtime *fe = file->private_data;
3226 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3229 buf = kmalloc(out_count, GFP_KERNEL);
3233 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3234 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3235 buf + offset, out_count - offset);
3237 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3238 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3239 buf + offset, out_count - offset);
3241 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3247 static const struct file_operations dpcm_state_fops = {
3248 .open = simple_open,
3249 .read = dpcm_state_read_file,
3250 .llseek = default_llseek,
3253 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3258 if (!rtd->dai_link->dynamic)
3261 if (!rtd->card->debugfs_card_root)
3264 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3265 rtd->card->debugfs_card_root);
3267 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3268 rtd, &dpcm_state_fops);