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(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 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1060 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1065 for_each_rtdcom(rtd, rtdcom) {
1066 component = rtdcom->component;
1068 ret = snd_soc_component_trigger(component, substream, cmd);
1073 snd_soc_dai_trigger(cpu_dai, substream, cmd);
1077 if (rtd->dai_link->ops->trigger) {
1078 ret = rtd->dai_link->ops->trigger(substream, cmd);
1086 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1089 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1090 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1091 struct snd_soc_dai *codec_dai;
1094 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1095 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1100 snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1107 * soc level wrapper for pointer callback
1108 * If cpu_dai, codec_dai, component driver has the delay callback, then
1109 * the runtime->delay will be updated accordingly.
1111 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1113 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1114 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1115 struct snd_soc_dai *codec_dai;
1116 struct snd_pcm_runtime *runtime = substream->runtime;
1117 snd_pcm_uframes_t offset = 0;
1118 snd_pcm_sframes_t delay = 0;
1119 snd_pcm_sframes_t codec_delay = 0;
1122 /* clearing the previous total delay */
1125 offset = snd_soc_pcm_component_pointer(substream);
1127 /* base delay if assigned in pointer callback */
1128 delay = runtime->delay;
1130 delay += snd_soc_dai_delay(cpu_dai, substream);
1132 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1133 codec_delay = max(codec_delay,
1134 snd_soc_dai_delay(codec_dai, substream));
1136 delay += codec_delay;
1138 runtime->delay = delay;
1143 /* connect a FE and BE */
1144 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1145 struct snd_soc_pcm_runtime *be, int stream)
1147 struct snd_soc_dpcm *dpcm;
1148 unsigned long flags;
1150 /* only add new dpcms */
1151 for_each_dpcm_be(fe, stream, dpcm) {
1152 if (dpcm->be == be && dpcm->fe == fe)
1156 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1162 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1163 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1164 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1165 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1166 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1167 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1169 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1170 stream ? "capture" : "playback", fe->dai_link->name,
1171 stream ? "<-" : "->", be->dai_link->name);
1173 #ifdef CONFIG_DEBUG_FS
1174 dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1175 fe->debugfs_dpcm_root);
1176 debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1181 /* reparent a BE onto another FE */
1182 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1183 struct snd_soc_pcm_runtime *be, int stream)
1185 struct snd_soc_dpcm *dpcm;
1186 struct snd_pcm_substream *fe_substream, *be_substream;
1188 /* reparent if BE is connected to other FEs */
1189 if (!be->dpcm[stream].users)
1192 be_substream = snd_soc_dpcm_get_substream(be, stream);
1194 for_each_dpcm_fe(be, stream, dpcm) {
1198 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1199 stream ? "capture" : "playback",
1200 dpcm->fe->dai_link->name,
1201 stream ? "<-" : "->", dpcm->be->dai_link->name);
1203 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1204 be_substream->runtime = fe_substream->runtime;
1209 /* disconnect a BE and FE */
1210 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1212 struct snd_soc_dpcm *dpcm, *d;
1213 unsigned long flags;
1215 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1216 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1217 stream ? "capture" : "playback",
1218 dpcm->be->dai_link->name);
1220 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1223 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1224 stream ? "capture" : "playback", fe->dai_link->name,
1225 stream ? "<-" : "->", dpcm->be->dai_link->name);
1227 /* BEs still alive need new FE */
1228 dpcm_be_reparent(fe, dpcm->be, stream);
1230 #ifdef CONFIG_DEBUG_FS
1231 debugfs_remove_recursive(dpcm->debugfs_state);
1233 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1234 list_del(&dpcm->list_be);
1235 list_del(&dpcm->list_fe);
1236 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1241 /* get BE for DAI widget and stream */
1242 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1243 struct snd_soc_dapm_widget *widget, int stream)
1245 struct snd_soc_pcm_runtime *be;
1246 struct snd_soc_dai *dai;
1249 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1251 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1252 for_each_card_rtds(card, be) {
1254 if (!be->dai_link->no_pcm)
1257 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1258 be->cpu_dai->playback_widget ?
1259 be->cpu_dai->playback_widget->name : "(not set)");
1261 if (be->cpu_dai->playback_widget == widget)
1264 for_each_rtd_codec_dai(be, i, dai) {
1265 if (dai->playback_widget == widget)
1271 for_each_card_rtds(card, be) {
1273 if (!be->dai_link->no_pcm)
1276 dev_dbg(card->dev, "ASoC: try BE %s\n",
1277 be->cpu_dai->capture_widget ?
1278 be->cpu_dai->capture_widget->name : "(not set)");
1280 if (be->cpu_dai->capture_widget == widget)
1283 for_each_rtd_codec_dai(be, i, dai) {
1284 if (dai->capture_widget == widget)
1290 /* dai link name and stream name set correctly ? */
1291 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1292 stream ? "capture" : "playback", widget->name);
1296 static inline struct snd_soc_dapm_widget *
1297 dai_get_widget(struct snd_soc_dai *dai, int stream)
1299 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1300 return dai->playback_widget;
1302 return dai->capture_widget;
1305 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1306 struct snd_soc_dapm_widget *widget)
1310 for (i = 0; i < list->num_widgets; i++) {
1311 if (widget == list->widgets[i])
1318 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1319 enum snd_soc_dapm_direction dir)
1321 struct snd_soc_card *card = widget->dapm->card;
1322 struct snd_soc_pcm_runtime *rtd;
1323 struct snd_soc_dai *dai;
1326 if (dir == SND_SOC_DAPM_DIR_OUT) {
1327 for_each_card_rtds(card, rtd) {
1328 if (!rtd->dai_link->no_pcm)
1331 if (rtd->cpu_dai->playback_widget == widget)
1334 for_each_rtd_codec_dai(rtd, i, dai) {
1335 if (dai->playback_widget == widget)
1339 } else { /* SND_SOC_DAPM_DIR_IN */
1340 for_each_card_rtds(card, rtd) {
1341 if (!rtd->dai_link->no_pcm)
1344 if (rtd->cpu_dai->capture_widget == widget)
1347 for_each_rtd_codec_dai(rtd, i, dai) {
1348 if (dai->capture_widget == widget)
1357 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1358 int stream, struct snd_soc_dapm_widget_list **list)
1360 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1363 /* get number of valid DAI paths and their widgets */
1364 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1365 dpcm_end_walk_at_be);
1367 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1368 stream ? "capture" : "playback");
1373 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1374 struct snd_soc_dapm_widget_list **list_)
1376 struct snd_soc_dpcm *dpcm;
1377 struct snd_soc_dapm_widget_list *list = *list_;
1378 struct snd_soc_dapm_widget *widget;
1379 struct snd_soc_dai *dai;
1382 /* Destroy any old FE <--> BE connections */
1383 for_each_dpcm_be(fe, stream, dpcm) {
1386 /* is there a valid CPU DAI widget for this BE */
1387 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1389 /* prune the BE if it's no longer in our active list */
1390 if (widget && widget_in_list(list, widget))
1393 /* is there a valid CODEC DAI widget for this BE */
1394 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1395 widget = dai_get_widget(dai, stream);
1397 /* prune the BE if it's no longer in our active list */
1398 if (widget && widget_in_list(list, widget))
1402 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1403 stream ? "capture" : "playback",
1404 dpcm->be->dai_link->name, fe->dai_link->name);
1405 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1406 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1410 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1414 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1415 struct snd_soc_dapm_widget_list **list_)
1417 struct snd_soc_card *card = fe->card;
1418 struct snd_soc_dapm_widget_list *list = *list_;
1419 struct snd_soc_pcm_runtime *be;
1420 int i, new = 0, err;
1422 /* Create any new FE <--> BE connections */
1423 for (i = 0; i < list->num_widgets; i++) {
1425 switch (list->widgets[i]->id) {
1426 case snd_soc_dapm_dai_in:
1427 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1430 case snd_soc_dapm_dai_out:
1431 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1438 /* is there a valid BE rtd for this widget */
1439 be = dpcm_get_be(card, list->widgets[i], stream);
1441 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1442 list->widgets[i]->name);
1446 /* make sure BE is a real BE */
1447 if (!be->dai_link->no_pcm)
1450 /* don't connect if FE is not running */
1451 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1454 /* newly connected FE and BE */
1455 err = dpcm_be_connect(fe, be, stream);
1457 dev_err(fe->dev, "ASoC: can't connect %s\n",
1458 list->widgets[i]->name);
1460 } else if (err == 0) /* already connected */
1464 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1468 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1473 * Find the corresponding BE DAIs that source or sink audio to this
1476 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1477 int stream, struct snd_soc_dapm_widget_list **list, int new)
1480 return dpcm_add_paths(fe, stream, list);
1482 return dpcm_prune_paths(fe, stream, list);
1485 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1487 struct snd_soc_dpcm *dpcm;
1488 unsigned long flags;
1490 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1491 for_each_dpcm_be(fe, stream, dpcm)
1492 dpcm->be->dpcm[stream].runtime_update =
1493 SND_SOC_DPCM_UPDATE_NO;
1494 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1497 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1500 struct snd_soc_dpcm *dpcm;
1502 /* disable any enabled and non active backends */
1503 for_each_dpcm_be(fe, stream, dpcm) {
1505 struct snd_soc_pcm_runtime *be = dpcm->be;
1506 struct snd_pcm_substream *be_substream =
1507 snd_soc_dpcm_get_substream(be, stream);
1509 if (be->dpcm[stream].users == 0)
1510 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1511 stream ? "capture" : "playback",
1512 be->dpcm[stream].state);
1514 if (--be->dpcm[stream].users != 0)
1517 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1520 soc_pcm_close(be_substream);
1521 be_substream->runtime = NULL;
1522 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1526 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1528 struct snd_soc_dpcm *dpcm;
1531 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1532 for_each_dpcm_be(fe, stream, dpcm) {
1534 struct snd_soc_pcm_runtime *be = dpcm->be;
1535 struct snd_pcm_substream *be_substream =
1536 snd_soc_dpcm_get_substream(be, stream);
1538 if (!be_substream) {
1539 dev_err(be->dev, "ASoC: no backend %s stream\n",
1540 stream ? "capture" : "playback");
1544 /* is this op for this BE ? */
1545 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1548 /* first time the dpcm is open ? */
1549 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1550 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1551 stream ? "capture" : "playback",
1552 be->dpcm[stream].state);
1554 if (be->dpcm[stream].users++ != 0)
1557 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1558 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1561 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1562 stream ? "capture" : "playback", be->dai_link->name);
1564 be_substream->runtime = be->dpcm[stream].runtime;
1565 err = soc_pcm_open(be_substream);
1567 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1568 be->dpcm[stream].users--;
1569 if (be->dpcm[stream].users < 0)
1570 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1571 stream ? "capture" : "playback",
1572 be->dpcm[stream].state);
1574 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1578 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1585 /* disable any enabled and non active backends */
1586 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1587 struct snd_soc_pcm_runtime *be = dpcm->be;
1588 struct snd_pcm_substream *be_substream =
1589 snd_soc_dpcm_get_substream(be, stream);
1591 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1594 if (be->dpcm[stream].users == 0)
1595 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1596 stream ? "capture" : "playback",
1597 be->dpcm[stream].state);
1599 if (--be->dpcm[stream].users != 0)
1602 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1605 soc_pcm_close(be_substream);
1606 be_substream->runtime = NULL;
1607 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1613 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1614 struct snd_soc_pcm_stream *stream)
1616 runtime->hw.rate_min = stream->rate_min;
1617 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1618 runtime->hw.channels_min = stream->channels_min;
1619 runtime->hw.channels_max = stream->channels_max;
1620 if (runtime->hw.formats)
1621 runtime->hw.formats &= stream->formats;
1623 runtime->hw.formats = stream->formats;
1624 runtime->hw.rates = stream->rates;
1627 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1630 struct snd_soc_pcm_runtime *fe = substream->private_data;
1631 struct snd_soc_dpcm *dpcm;
1632 struct snd_soc_dai *dai;
1633 int stream = substream->stream;
1635 if (!fe->dai_link->dpcm_merged_format)
1639 * It returns merged BE codec format
1640 * if FE want to use it (= dpcm_merged_format)
1643 for_each_dpcm_be(fe, stream, dpcm) {
1644 struct snd_soc_pcm_runtime *be = dpcm->be;
1645 struct snd_soc_dai_driver *codec_dai_drv;
1646 struct snd_soc_pcm_stream *codec_stream;
1649 for_each_rtd_codec_dai(be, i, dai) {
1651 * Skip CODECs which don't support the current stream
1652 * type. See soc_pcm_init_runtime_hw() for more details
1654 if (!snd_soc_dai_stream_valid(dai, stream))
1657 codec_dai_drv = dai->driver;
1658 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1659 codec_stream = &codec_dai_drv->playback;
1661 codec_stream = &codec_dai_drv->capture;
1663 *formats &= codec_stream->formats;
1668 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1669 unsigned int *channels_min,
1670 unsigned int *channels_max)
1672 struct snd_soc_pcm_runtime *fe = substream->private_data;
1673 struct snd_soc_dpcm *dpcm;
1674 int stream = substream->stream;
1676 if (!fe->dai_link->dpcm_merged_chan)
1680 * It returns merged BE codec channel;
1681 * if FE want to use it (= dpcm_merged_chan)
1684 for_each_dpcm_be(fe, stream, dpcm) {
1685 struct snd_soc_pcm_runtime *be = dpcm->be;
1686 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1687 struct snd_soc_dai_driver *codec_dai_drv;
1688 struct snd_soc_pcm_stream *codec_stream;
1689 struct snd_soc_pcm_stream *cpu_stream;
1691 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1692 cpu_stream = &cpu_dai_drv->playback;
1694 cpu_stream = &cpu_dai_drv->capture;
1696 *channels_min = max(*channels_min, cpu_stream->channels_min);
1697 *channels_max = min(*channels_max, cpu_stream->channels_max);
1700 * chan min/max cannot be enforced if there are multiple CODEC
1701 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1703 if (be->num_codecs == 1) {
1704 codec_dai_drv = be->codec_dais[0]->driver;
1706 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1707 codec_stream = &codec_dai_drv->playback;
1709 codec_stream = &codec_dai_drv->capture;
1711 *channels_min = max(*channels_min,
1712 codec_stream->channels_min);
1713 *channels_max = min(*channels_max,
1714 codec_stream->channels_max);
1719 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1720 unsigned int *rates,
1721 unsigned int *rate_min,
1722 unsigned int *rate_max)
1724 struct snd_soc_pcm_runtime *fe = substream->private_data;
1725 struct snd_soc_dpcm *dpcm;
1726 int stream = substream->stream;
1728 if (!fe->dai_link->dpcm_merged_rate)
1732 * It returns merged BE codec channel;
1733 * if FE want to use it (= dpcm_merged_chan)
1736 for_each_dpcm_be(fe, stream, dpcm) {
1737 struct snd_soc_pcm_runtime *be = dpcm->be;
1738 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1739 struct snd_soc_dai_driver *codec_dai_drv;
1740 struct snd_soc_pcm_stream *codec_stream;
1741 struct snd_soc_pcm_stream *cpu_stream;
1742 struct snd_soc_dai *dai;
1745 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1746 cpu_stream = &cpu_dai_drv->playback;
1748 cpu_stream = &cpu_dai_drv->capture;
1750 *rate_min = max(*rate_min, cpu_stream->rate_min);
1751 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1752 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1754 for_each_rtd_codec_dai(be, i, dai) {
1756 * Skip CODECs which don't support the current stream
1757 * type. See soc_pcm_init_runtime_hw() for more details
1759 if (!snd_soc_dai_stream_valid(dai, stream))
1762 codec_dai_drv = dai->driver;
1763 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1764 codec_stream = &codec_dai_drv->playback;
1766 codec_stream = &codec_dai_drv->capture;
1768 *rate_min = max(*rate_min, codec_stream->rate_min);
1769 *rate_max = min_not_zero(*rate_max,
1770 codec_stream->rate_max);
1771 *rates = snd_pcm_rate_mask_intersect(*rates,
1772 codec_stream->rates);
1777 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1779 struct snd_pcm_runtime *runtime = substream->runtime;
1780 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1781 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1782 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1784 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1785 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1787 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1789 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1790 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1791 &runtime->hw.channels_max);
1792 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1793 &runtime->hw.rate_min, &runtime->hw.rate_max);
1796 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1798 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1799 * for avoiding the race with trigger callback.
1800 * If the state is unset and a trigger is pending while the previous operation,
1801 * process the pending trigger action here.
1803 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1804 int stream, enum snd_soc_dpcm_update state)
1806 struct snd_pcm_substream *substream =
1807 snd_soc_dpcm_get_substream(fe, stream);
1809 snd_pcm_stream_lock_irq(substream);
1810 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1811 dpcm_fe_dai_do_trigger(substream,
1812 fe->dpcm[stream].trigger_pending - 1);
1813 fe->dpcm[stream].trigger_pending = 0;
1815 fe->dpcm[stream].runtime_update = state;
1816 snd_pcm_stream_unlock_irq(substream);
1819 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1822 struct snd_soc_dpcm *dpcm;
1823 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1824 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1827 /* apply symmetry for FE */
1828 if (soc_pcm_has_symmetry(fe_substream))
1829 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1831 /* Symmetry only applies if we've got an active stream. */
1832 if (fe_cpu_dai->active) {
1833 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1838 /* apply symmetry for BE */
1839 for_each_dpcm_be(fe, stream, dpcm) {
1840 struct snd_soc_pcm_runtime *be = dpcm->be;
1841 struct snd_pcm_substream *be_substream =
1842 snd_soc_dpcm_get_substream(be, stream);
1843 struct snd_soc_pcm_runtime *rtd;
1844 struct snd_soc_dai *codec_dai;
1847 /* A backend may not have the requested substream */
1851 rtd = be_substream->private_data;
1852 if (rtd->dai_link->be_hw_params_fixup)
1855 if (soc_pcm_has_symmetry(be_substream))
1856 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1858 /* Symmetry only applies if we've got an active stream. */
1859 if (rtd->cpu_dai->active) {
1860 err = soc_pcm_apply_symmetry(fe_substream,
1866 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1867 if (codec_dai->active) {
1868 err = soc_pcm_apply_symmetry(fe_substream,
1879 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1881 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1882 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1883 int stream = fe_substream->stream, ret = 0;
1885 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1887 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1889 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1893 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1895 /* start the DAI frontend */
1896 ret = soc_pcm_open(fe_substream);
1898 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1902 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1904 dpcm_set_fe_runtime(fe_substream);
1905 snd_pcm_limit_hw_rates(runtime);
1907 ret = dpcm_apply_symmetry(fe_substream, stream);
1909 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1914 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1918 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1920 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1924 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1926 struct snd_soc_dpcm *dpcm;
1928 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1929 for_each_dpcm_be(fe, stream, dpcm) {
1931 struct snd_soc_pcm_runtime *be = dpcm->be;
1932 struct snd_pcm_substream *be_substream =
1933 snd_soc_dpcm_get_substream(be, stream);
1935 /* is this op for this BE ? */
1936 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1939 if (be->dpcm[stream].users == 0)
1940 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1941 stream ? "capture" : "playback",
1942 be->dpcm[stream].state);
1944 if (--be->dpcm[stream].users != 0)
1947 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1948 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1949 soc_pcm_hw_free(be_substream);
1950 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1953 dev_dbg(be->dev, "ASoC: close BE %s\n",
1954 be->dai_link->name);
1956 soc_pcm_close(be_substream);
1957 be_substream->runtime = NULL;
1959 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1964 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1966 struct snd_soc_pcm_runtime *fe = substream->private_data;
1967 int stream = substream->stream;
1969 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1971 /* shutdown the BEs */
1972 dpcm_be_dai_shutdown(fe, substream->stream);
1974 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1976 /* now shutdown the frontend */
1977 soc_pcm_close(substream);
1979 /* run the stream event for each BE */
1980 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1982 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1983 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1987 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1989 struct snd_soc_dpcm *dpcm;
1991 /* only hw_params backends that are either sinks or sources
1992 * to this frontend DAI */
1993 for_each_dpcm_be(fe, stream, dpcm) {
1995 struct snd_soc_pcm_runtime *be = dpcm->be;
1996 struct snd_pcm_substream *be_substream =
1997 snd_soc_dpcm_get_substream(be, stream);
1999 /* is this op for this BE ? */
2000 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2003 /* only free hw when no longer used - check all FEs */
2004 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2007 /* do not free hw if this BE is used by other FE */
2008 if (be->dpcm[stream].users > 1)
2011 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2012 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2013 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2014 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2015 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2016 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2019 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2020 be->dai_link->name);
2022 soc_pcm_hw_free(be_substream);
2024 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2030 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2032 struct snd_soc_pcm_runtime *fe = substream->private_data;
2033 int err, stream = substream->stream;
2035 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2036 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2038 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2040 /* call hw_free on the frontend */
2041 err = soc_pcm_hw_free(substream);
2043 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2044 fe->dai_link->name);
2046 /* only hw_params backends that are either sinks or sources
2047 * to this frontend DAI */
2048 err = dpcm_be_dai_hw_free(fe, stream);
2050 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2051 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2053 mutex_unlock(&fe->card->mutex);
2057 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2059 struct snd_soc_dpcm *dpcm;
2062 for_each_dpcm_be(fe, stream, dpcm) {
2064 struct snd_soc_pcm_runtime *be = dpcm->be;
2065 struct snd_pcm_substream *be_substream =
2066 snd_soc_dpcm_get_substream(be, stream);
2068 /* is this op for this BE ? */
2069 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2072 /* copy params for each dpcm */
2073 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2074 sizeof(struct snd_pcm_hw_params));
2076 /* perform any hw_params fixups */
2077 if (be->dai_link->be_hw_params_fixup) {
2078 ret = be->dai_link->be_hw_params_fixup(be,
2082 "ASoC: hw_params BE fixup failed %d\n",
2088 /* copy the fixed-up hw params for BE dai */
2089 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2090 sizeof(struct snd_pcm_hw_params));
2092 /* only allow hw_params() if no connected FEs are running */
2093 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2096 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2097 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2098 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2101 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2102 be->dai_link->name);
2104 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2106 dev_err(dpcm->be->dev,
2107 "ASoC: hw_params BE failed %d\n", ret);
2111 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2116 /* disable any enabled and non active backends */
2117 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2118 struct snd_soc_pcm_runtime *be = dpcm->be;
2119 struct snd_pcm_substream *be_substream =
2120 snd_soc_dpcm_get_substream(be, stream);
2122 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2125 /* only allow hw_free() if no connected FEs are running */
2126 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2129 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2130 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2131 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2132 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2135 soc_pcm_hw_free(be_substream);
2141 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2142 struct snd_pcm_hw_params *params)
2144 struct snd_soc_pcm_runtime *fe = substream->private_data;
2145 int ret, stream = substream->stream;
2147 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2148 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2150 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2151 sizeof(struct snd_pcm_hw_params));
2152 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2154 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2158 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2159 fe->dai_link->name, params_rate(params),
2160 params_channels(params), params_format(params));
2162 /* call hw_params on the frontend */
2163 ret = soc_pcm_hw_params(substream, params);
2165 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2166 dpcm_be_dai_hw_free(fe, stream);
2168 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2171 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2172 mutex_unlock(&fe->card->mutex);
2176 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2177 struct snd_pcm_substream *substream, int cmd)
2181 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2182 dpcm->be->dai_link->name, cmd);
2184 ret = soc_pcm_trigger(substream, cmd);
2186 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2191 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2194 struct snd_soc_dpcm *dpcm;
2197 for_each_dpcm_be(fe, stream, dpcm) {
2199 struct snd_soc_pcm_runtime *be = dpcm->be;
2200 struct snd_pcm_substream *be_substream =
2201 snd_soc_dpcm_get_substream(be, stream);
2203 /* is this op for this BE ? */
2204 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2208 case SNDRV_PCM_TRIGGER_START:
2209 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2210 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2213 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2217 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2219 case SNDRV_PCM_TRIGGER_RESUME:
2220 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2223 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2227 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2229 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2230 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2233 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2237 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2239 case SNDRV_PCM_TRIGGER_STOP:
2240 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2243 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2246 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2250 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2252 case SNDRV_PCM_TRIGGER_SUSPEND:
2253 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2256 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2259 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2263 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2265 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2266 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2269 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2272 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2276 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2283 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2285 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2287 struct snd_soc_pcm_runtime *fe = substream->private_data;
2288 int stream = substream->stream, ret;
2289 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2291 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2294 case SND_SOC_DPCM_TRIGGER_PRE:
2295 /* call trigger on the frontend before the backend. */
2297 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2298 fe->dai_link->name, cmd);
2300 ret = soc_pcm_trigger(substream, cmd);
2302 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2306 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2308 case SND_SOC_DPCM_TRIGGER_POST:
2309 /* call trigger on the frontend after the backend. */
2311 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2313 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2317 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2318 fe->dai_link->name, cmd);
2320 ret = soc_pcm_trigger(substream, cmd);
2322 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2323 /* bespoke trigger() - handles both FE and BEs */
2325 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2326 fe->dai_link->name, cmd);
2328 ret = soc_pcm_bespoke_trigger(substream, cmd);
2330 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2335 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2336 fe->dai_link->name);
2342 case SNDRV_PCM_TRIGGER_START:
2343 case SNDRV_PCM_TRIGGER_RESUME:
2344 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2345 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2347 case SNDRV_PCM_TRIGGER_STOP:
2348 case SNDRV_PCM_TRIGGER_SUSPEND:
2349 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2351 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2352 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2357 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2361 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2363 struct snd_soc_pcm_runtime *fe = substream->private_data;
2364 int stream = substream->stream;
2366 /* if FE's runtime_update is already set, we're in race;
2367 * process this trigger later at exit
2369 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2370 fe->dpcm[stream].trigger_pending = cmd + 1;
2371 return 0; /* delayed, assuming it's successful */
2374 /* we're alone, let's trigger */
2375 return dpcm_fe_dai_do_trigger(substream, cmd);
2378 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2380 struct snd_soc_dpcm *dpcm;
2383 for_each_dpcm_be(fe, stream, dpcm) {
2385 struct snd_soc_pcm_runtime *be = dpcm->be;
2386 struct snd_pcm_substream *be_substream =
2387 snd_soc_dpcm_get_substream(be, stream);
2389 /* is this op for this BE ? */
2390 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2393 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2394 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2395 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2396 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2399 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2400 be->dai_link->name);
2402 ret = soc_pcm_prepare(be_substream);
2404 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2409 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2414 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2416 struct snd_soc_pcm_runtime *fe = substream->private_data;
2417 int stream = substream->stream, ret = 0;
2419 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2421 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2423 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2425 /* there is no point preparing this FE if there are no BEs */
2426 if (list_empty(&fe->dpcm[stream].be_clients)) {
2427 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2428 fe->dai_link->name);
2433 ret = dpcm_be_dai_prepare(fe, substream->stream);
2437 /* call prepare on the frontend */
2438 ret = soc_pcm_prepare(substream);
2440 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2441 fe->dai_link->name);
2445 /* run the stream event for each BE */
2446 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2447 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2450 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2451 mutex_unlock(&fe->card->mutex);
2456 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2458 struct snd_pcm_substream *substream =
2459 snd_soc_dpcm_get_substream(fe, stream);
2460 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2463 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2464 stream ? "capture" : "playback", fe->dai_link->name);
2466 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2467 /* call bespoke trigger - FE takes care of all BE triggers */
2468 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2469 fe->dai_link->name);
2471 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2473 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2475 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2476 fe->dai_link->name);
2478 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2480 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2483 err = dpcm_be_dai_hw_free(fe, stream);
2485 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2487 err = dpcm_be_dai_shutdown(fe, stream);
2489 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2491 /* run the stream event for each BE */
2492 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2497 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2499 struct snd_pcm_substream *substream =
2500 snd_soc_dpcm_get_substream(fe, stream);
2501 struct snd_soc_dpcm *dpcm;
2502 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2504 unsigned long flags;
2506 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2507 stream ? "capture" : "playback", fe->dai_link->name);
2509 /* Only start the BE if the FE is ready */
2510 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2511 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2514 /* startup must always be called for new BEs */
2515 ret = dpcm_be_dai_startup(fe, stream);
2519 /* keep going if FE state is > open */
2520 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2523 ret = dpcm_be_dai_hw_params(fe, stream);
2527 /* keep going if FE state is > hw_params */
2528 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2532 ret = dpcm_be_dai_prepare(fe, stream);
2536 /* run the stream event for each BE */
2537 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2539 /* keep going if FE state is > prepare */
2540 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2541 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2544 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2545 /* call trigger on the frontend - FE takes care of all BE triggers */
2546 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2547 fe->dai_link->name);
2549 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2551 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2555 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2556 fe->dai_link->name);
2558 ret = dpcm_be_dai_trigger(fe, stream,
2559 SNDRV_PCM_TRIGGER_START);
2561 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2569 dpcm_be_dai_hw_free(fe, stream);
2571 dpcm_be_dai_shutdown(fe, stream);
2573 /* disconnect any non started BEs */
2574 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2575 for_each_dpcm_be(fe, stream, dpcm) {
2576 struct snd_soc_pcm_runtime *be = dpcm->be;
2577 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2578 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2580 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2585 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2589 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2590 ret = dpcm_run_update_startup(fe, stream);
2592 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2593 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2598 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2602 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2603 ret = dpcm_run_update_shutdown(fe, stream);
2605 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2606 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2611 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2613 struct snd_soc_dapm_widget_list *list;
2616 if (!fe->dai_link->dynamic)
2619 /* only check active links */
2620 if (!fe->cpu_dai->active)
2623 /* DAPM sync will call this to update DSP paths */
2624 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2625 new ? "new" : "old", fe->dai_link->name);
2627 /* skip if FE doesn't have playback capability */
2628 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2629 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2632 /* skip if FE isn't currently playing */
2633 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2636 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2638 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2639 fe->dai_link->name, "playback");
2643 /* update any playback paths */
2644 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2647 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2649 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2651 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2652 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2655 dpcm_path_put(&list);
2658 /* skip if FE doesn't have capture capability */
2659 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2660 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2663 /* skip if FE isn't currently capturing */
2664 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2667 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2669 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2670 fe->dai_link->name, "capture");
2674 /* update any old capture paths */
2675 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2678 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2680 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2682 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2683 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2686 dpcm_path_put(&list);
2691 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2694 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2696 struct snd_soc_pcm_runtime *fe;
2699 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2700 /* shutdown all old paths first */
2701 for_each_card_rtds(card, fe) {
2702 ret = soc_dpcm_fe_runtime_update(fe, 0);
2707 /* bring new paths up */
2708 for_each_card_rtds(card, fe) {
2709 ret = soc_dpcm_fe_runtime_update(fe, 1);
2715 mutex_unlock(&card->mutex);
2718 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2720 struct snd_soc_dpcm *dpcm;
2721 struct snd_soc_dai *dai;
2723 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2725 struct snd_soc_pcm_runtime *be = dpcm->be;
2728 if (be->dai_link->ignore_suspend)
2731 for_each_rtd_codec_dai(be, i, dai) {
2732 struct snd_soc_dai_driver *drv = dai->driver;
2734 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2735 be->dai_link->name);
2737 if (drv->ops && drv->ops->digital_mute &&
2738 dai->playback_active)
2739 drv->ops->digital_mute(dai, mute);
2746 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2748 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2749 struct snd_soc_dpcm *dpcm;
2750 struct snd_soc_dapm_widget_list *list;
2752 int stream = fe_substream->stream;
2754 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2755 fe->dpcm[stream].runtime = fe_substream->runtime;
2757 ret = dpcm_path_get(fe, stream, &list);
2759 mutex_unlock(&fe->card->mutex);
2761 } else if (ret == 0) {
2762 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2763 fe->dai_link->name, stream ? "capture" : "playback");
2766 /* calculate valid and active FE <-> BE dpcms */
2767 dpcm_process_paths(fe, stream, &list, 1);
2769 ret = dpcm_fe_dai_startup(fe_substream);
2771 /* clean up all links */
2772 for_each_dpcm_be(fe, stream, dpcm)
2773 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2775 dpcm_be_disconnect(fe, stream);
2776 fe->dpcm[stream].runtime = NULL;
2779 dpcm_clear_pending_state(fe, stream);
2780 dpcm_path_put(&list);
2781 mutex_unlock(&fe->card->mutex);
2785 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2787 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2788 struct snd_soc_dpcm *dpcm;
2789 int stream = fe_substream->stream, ret;
2791 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2792 ret = dpcm_fe_dai_shutdown(fe_substream);
2794 /* mark FE's links ready to prune */
2795 for_each_dpcm_be(fe, stream, dpcm)
2796 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2798 dpcm_be_disconnect(fe, stream);
2800 fe->dpcm[stream].runtime = NULL;
2801 mutex_unlock(&fe->card->mutex);
2805 static void soc_pcm_private_free(struct snd_pcm *pcm)
2807 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2809 /* need to sync the delayed work before releasing resources */
2810 flush_delayed_work(&rtd->delayed_work);
2811 snd_soc_pcm_component_free(pcm);
2814 /* create a new pcm */
2815 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2817 struct snd_soc_dai *codec_dai;
2818 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2819 struct snd_soc_rtdcom_list *rtdcom;
2820 struct snd_pcm *pcm;
2822 int ret = 0, playback = 0, capture = 0;
2825 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2826 playback = rtd->dai_link->dpcm_playback;
2827 capture = rtd->dai_link->dpcm_capture;
2829 /* Adapt stream for codec2codec links */
2830 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2831 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2832 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2833 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2835 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2836 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2837 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2839 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2840 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2844 capture = capture && cpu_capture->channels_min;
2845 playback = playback && cpu_playback->channels_min;
2848 if (rtd->dai_link->playback_only) {
2853 if (rtd->dai_link->capture_only) {
2858 /* create the PCM */
2859 if (rtd->dai_link->params) {
2860 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2861 rtd->dai_link->stream_name);
2863 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2864 playback, capture, &pcm);
2865 } else if (rtd->dai_link->no_pcm) {
2866 snprintf(new_name, sizeof(new_name), "(%s)",
2867 rtd->dai_link->stream_name);
2869 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2870 playback, capture, &pcm);
2872 if (rtd->dai_link->dynamic)
2873 snprintf(new_name, sizeof(new_name), "%s (*)",
2874 rtd->dai_link->stream_name);
2876 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2877 rtd->dai_link->stream_name,
2878 (rtd->num_codecs > 1) ?
2879 "multicodec" : rtd->codec_dai->name, num);
2881 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2885 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2886 rtd->dai_link->name);
2889 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2891 /* DAPM dai link stream work */
2892 if (rtd->dai_link->params)
2893 INIT_DELAYED_WORK(&rtd->delayed_work,
2894 codec2codec_close_delayed_work);
2896 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2898 pcm->nonatomic = rtd->dai_link->nonatomic;
2900 pcm->private_data = rtd;
2902 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2904 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2906 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2910 /* ASoC PCM operations */
2911 if (rtd->dai_link->dynamic) {
2912 rtd->ops.open = dpcm_fe_dai_open;
2913 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2914 rtd->ops.prepare = dpcm_fe_dai_prepare;
2915 rtd->ops.trigger = dpcm_fe_dai_trigger;
2916 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2917 rtd->ops.close = dpcm_fe_dai_close;
2918 rtd->ops.pointer = soc_pcm_pointer;
2919 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2921 rtd->ops.open = soc_pcm_open;
2922 rtd->ops.hw_params = soc_pcm_hw_params;
2923 rtd->ops.prepare = soc_pcm_prepare;
2924 rtd->ops.trigger = soc_pcm_trigger;
2925 rtd->ops.hw_free = soc_pcm_hw_free;
2926 rtd->ops.close = soc_pcm_close;
2927 rtd->ops.pointer = soc_pcm_pointer;
2928 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2931 for_each_rtdcom(rtd, rtdcom) {
2932 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
2938 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2940 rtd->ops.page = snd_soc_pcm_component_page;
2942 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2946 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2949 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2951 ret = snd_soc_pcm_component_new(pcm);
2953 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2957 pcm->private_free = soc_pcm_private_free;
2958 pcm->no_device_suspend = true;
2960 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2961 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2966 /* is the current PCM operation for this FE ? */
2967 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2969 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2973 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2975 /* is the current PCM operation for this BE ? */
2976 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2977 struct snd_soc_pcm_runtime *be, int stream)
2979 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2980 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2981 be->dpcm[stream].runtime_update))
2985 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2987 /* get the substream for this BE */
2988 struct snd_pcm_substream *
2989 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2991 return be->pcm->streams[stream].substream;
2993 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2995 /* get the BE runtime state */
2996 enum snd_soc_dpcm_state
2997 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2999 return be->dpcm[stream].state;
3001 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3003 /* set the BE runtime state */
3004 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3005 int stream, enum snd_soc_dpcm_state state)
3007 be->dpcm[stream].state = state;
3009 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3012 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3013 * are not running, paused or suspended for the specified stream direction.
3015 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3016 struct snd_soc_pcm_runtime *be, int stream)
3018 struct snd_soc_dpcm *dpcm;
3021 unsigned long flags;
3023 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3024 for_each_dpcm_fe(be, stream, dpcm) {
3029 state = dpcm->fe->dpcm[stream].state;
3030 if (state == SND_SOC_DPCM_STATE_START ||
3031 state == SND_SOC_DPCM_STATE_PAUSED ||
3032 state == SND_SOC_DPCM_STATE_SUSPEND) {
3037 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3039 /* it's safe to free/stop this BE DAI */
3042 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3045 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3046 * running, paused or suspended for the specified stream direction.
3048 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3049 struct snd_soc_pcm_runtime *be, int stream)
3051 struct snd_soc_dpcm *dpcm;
3054 unsigned long flags;
3056 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3057 for_each_dpcm_fe(be, stream, dpcm) {
3062 state = dpcm->fe->dpcm[stream].state;
3063 if (state == SND_SOC_DPCM_STATE_START ||
3064 state == SND_SOC_DPCM_STATE_PAUSED ||
3065 state == SND_SOC_DPCM_STATE_SUSPEND ||
3066 state == SND_SOC_DPCM_STATE_PREPARE) {
3071 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3073 /* it's safe to change hw_params */
3076 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3078 #ifdef CONFIG_DEBUG_FS
3079 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3082 case SND_SOC_DPCM_STATE_NEW:
3084 case SND_SOC_DPCM_STATE_OPEN:
3086 case SND_SOC_DPCM_STATE_HW_PARAMS:
3088 case SND_SOC_DPCM_STATE_PREPARE:
3090 case SND_SOC_DPCM_STATE_START:
3092 case SND_SOC_DPCM_STATE_STOP:
3094 case SND_SOC_DPCM_STATE_SUSPEND:
3096 case SND_SOC_DPCM_STATE_PAUSED:
3098 case SND_SOC_DPCM_STATE_HW_FREE:
3100 case SND_SOC_DPCM_STATE_CLOSE:
3107 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3108 int stream, char *buf, size_t size)
3110 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3111 struct snd_soc_dpcm *dpcm;
3113 unsigned long flags;
3116 offset += snprintf(buf + offset, size - offset,
3117 "[%s - %s]\n", fe->dai_link->name,
3118 stream ? "Capture" : "Playback");
3120 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3121 dpcm_state_string(fe->dpcm[stream].state));
3123 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3124 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3125 offset += snprintf(buf + offset, size - offset,
3127 "Format = %s, Channels = %d, Rate = %d\n",
3128 snd_pcm_format_name(params_format(params)),
3129 params_channels(params),
3130 params_rate(params));
3133 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3135 if (list_empty(&fe->dpcm[stream].be_clients)) {
3136 offset += snprintf(buf + offset, size - offset,
3137 " No active DSP links\n");
3141 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3142 for_each_dpcm_be(fe, stream, dpcm) {
3143 struct snd_soc_pcm_runtime *be = dpcm->be;
3144 params = &dpcm->hw_params;
3146 offset += snprintf(buf + offset, size - offset,
3147 "- %s\n", be->dai_link->name);
3149 offset += snprintf(buf + offset, size - offset,
3151 dpcm_state_string(be->dpcm[stream].state));
3153 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3154 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3155 offset += snprintf(buf + offset, size - offset,
3156 " Hardware Params: "
3157 "Format = %s, Channels = %d, Rate = %d\n",
3158 snd_pcm_format_name(params_format(params)),
3159 params_channels(params),
3160 params_rate(params));
3162 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3168 size_t count, loff_t *ppos)
3170 struct snd_soc_pcm_runtime *fe = file->private_data;
3171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3174 buf = kmalloc(out_count, GFP_KERNEL);
3178 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3179 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3180 buf + offset, out_count - offset);
3182 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3183 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3184 buf + offset, out_count - offset);
3186 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3192 static const struct file_operations dpcm_state_fops = {
3193 .open = simple_open,
3194 .read = dpcm_state_read_file,
3195 .llseek = default_llseek,
3198 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3203 if (!rtd->dai_link->dynamic)
3206 if (!rtd->card->debugfs_card_root)
3209 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3210 rtd->card->debugfs_card_root);
3212 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3213 rtd, &dpcm_state_fops);