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_rtd_components(rtd, rtdcom, component)
122 ignore &= !component->driver->use_pmdown_time;
128 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
129 * @substream: the pcm substream
130 * @hw: the hardware parameters
132 * Sets the substream runtime hardware parameters.
134 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
135 const struct snd_pcm_hardware *hw)
137 struct snd_pcm_runtime *runtime = substream->runtime;
138 runtime->hw.info = hw->info;
139 runtime->hw.formats = hw->formats;
140 runtime->hw.period_bytes_min = hw->period_bytes_min;
141 runtime->hw.period_bytes_max = hw->period_bytes_max;
142 runtime->hw.periods_min = hw->periods_min;
143 runtime->hw.periods_max = hw->periods_max;
144 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
145 runtime->hw.fifo_size = hw->fifo_size;
148 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
150 /* DPCM stream event, send event to FE and all active BEs. */
151 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
154 struct snd_soc_dpcm *dpcm;
156 for_each_dpcm_be(fe, dir, dpcm) {
158 struct snd_soc_pcm_runtime *be = dpcm->be;
160 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
161 be->dai_link->name, event, dir);
163 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
164 (be->dpcm[dir].users >= 1))
167 snd_soc_dapm_stream_event(be, dir, event);
170 snd_soc_dapm_stream_event(fe, dir, event);
175 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
176 struct snd_soc_dai *soc_dai)
178 struct snd_soc_pcm_runtime *rtd = substream->private_data;
181 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
182 rtd->dai_link->symmetric_rates)) {
183 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
186 ret = snd_pcm_hw_constraint_single(substream->runtime,
187 SNDRV_PCM_HW_PARAM_RATE,
190 dev_err(soc_dai->dev,
191 "ASoC: Unable to apply rate constraint: %d\n",
197 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
198 rtd->dai_link->symmetric_channels)) {
199 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
202 ret = snd_pcm_hw_constraint_single(substream->runtime,
203 SNDRV_PCM_HW_PARAM_CHANNELS,
206 dev_err(soc_dai->dev,
207 "ASoC: Unable to apply channel symmetry constraint: %d\n",
213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
214 rtd->dai_link->symmetric_samplebits)) {
215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
216 soc_dai->sample_bits);
218 ret = snd_pcm_hw_constraint_single(substream->runtime,
219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
220 soc_dai->sample_bits);
222 dev_err(soc_dai->dev,
223 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
232 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
235 struct snd_soc_pcm_runtime *rtd = substream->private_data;
236 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
237 struct snd_soc_dai *codec_dai;
238 unsigned int rate, channels, sample_bits, symmetry, i;
240 rate = params_rate(params);
241 channels = params_channels(params);
242 sample_bits = snd_pcm_format_physical_width(params_format(params));
244 /* reject unmatched parameters when applying symmetry */
245 symmetry = cpu_dai->driver->symmetric_rates ||
246 rtd->dai_link->symmetric_rates;
248 for_each_rtd_codec_dai(rtd, i, codec_dai)
249 symmetry |= codec_dai->driver->symmetric_rates;
251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
253 cpu_dai->rate, rate);
257 symmetry = cpu_dai->driver->symmetric_channels ||
258 rtd->dai_link->symmetric_channels;
260 for_each_rtd_codec_dai(rtd, i, codec_dai)
261 symmetry |= codec_dai->driver->symmetric_channels;
263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
265 cpu_dai->channels, channels);
269 symmetry = cpu_dai->driver->symmetric_samplebits ||
270 rtd->dai_link->symmetric_samplebits;
272 for_each_rtd_codec_dai(rtd, i, codec_dai)
273 symmetry |= codec_dai->driver->symmetric_samplebits;
275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
277 cpu_dai->sample_bits, sample_bits);
284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
288 struct snd_soc_dai_link *link = rtd->dai_link;
289 struct snd_soc_dai *codec_dai;
290 unsigned int symmetry, i;
292 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
293 cpu_driver->symmetric_channels || link->symmetric_channels ||
294 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
296 for_each_rtd_codec_dai(rtd, i, codec_dai)
297 symmetry = symmetry ||
298 codec_dai->driver->symmetric_rates ||
299 codec_dai->driver->symmetric_channels ||
300 codec_dai->driver->symmetric_samplebits;
305 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
307 struct snd_soc_pcm_runtime *rtd = substream->private_data;
313 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
315 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
319 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
321 struct snd_soc_pcm_runtime *rtd = substream->private_data;
322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
323 struct snd_soc_dai *codec_dai;
325 unsigned int bits = 0, cpu_bits;
327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
328 for_each_rtd_codec_dai(rtd, i, codec_dai) {
329 if (codec_dai->driver->playback.sig_bits == 0) {
333 bits = max(codec_dai->driver->playback.sig_bits, bits);
335 cpu_bits = cpu_dai->driver->playback.sig_bits;
337 for_each_rtd_codec_dai(rtd, i, codec_dai) {
338 if (codec_dai->driver->capture.sig_bits == 0) {
342 bits = max(codec_dai->driver->capture.sig_bits, bits);
344 cpu_bits = cpu_dai->driver->capture.sig_bits;
347 soc_pcm_set_msb(substream, bits);
348 soc_pcm_set_msb(substream, cpu_bits);
351 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
353 struct snd_pcm_runtime *runtime = substream->runtime;
354 struct snd_pcm_hardware *hw = &runtime->hw;
355 struct snd_soc_pcm_runtime *rtd = substream->private_data;
356 struct snd_soc_dai *codec_dai;
357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
358 struct snd_soc_dai_driver *codec_dai_drv;
359 struct snd_soc_pcm_stream *codec_stream;
360 struct snd_soc_pcm_stream *cpu_stream;
361 unsigned int chan_min = 0, chan_max = UINT_MAX;
362 unsigned int rate_min = 0, rate_max = UINT_MAX;
363 unsigned int rates = UINT_MAX;
364 u64 formats = ULLONG_MAX;
367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
368 cpu_stream = &cpu_dai_drv->playback;
370 cpu_stream = &cpu_dai_drv->capture;
372 /* first calculate min/max only for CODECs in the DAI link */
373 for_each_rtd_codec_dai(rtd, i, codec_dai) {
376 * Skip CODECs which don't support the current stream type.
377 * Otherwise, since the rate, channel, and format values will
378 * zero in that case, we would have no usable settings left,
379 * causing the resulting setup to fail.
380 * At least one CODEC should match, otherwise we should have
381 * bailed out on a higher level, since there would be no
382 * CODEC to support the transfer direction in that case.
384 if (!snd_soc_dai_stream_valid(codec_dai,
388 codec_dai_drv = codec_dai->driver;
389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
390 codec_stream = &codec_dai_drv->playback;
392 codec_stream = &codec_dai_drv->capture;
393 chan_min = max(chan_min, codec_stream->channels_min);
394 chan_max = min(chan_max, codec_stream->channels_max);
395 rate_min = max(rate_min, codec_stream->rate_min);
396 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
397 formats &= codec_stream->formats;
398 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
402 * chan min/max cannot be enforced if there are multiple CODEC DAIs
403 * connected to a single CPU DAI, use CPU DAI's directly and let
404 * channel allocation be fixed up later
406 if (rtd->num_codecs > 1) {
407 chan_min = cpu_stream->channels_min;
408 chan_max = cpu_stream->channels_max;
411 hw->channels_min = max(chan_min, cpu_stream->channels_min);
412 hw->channels_max = min(chan_max, cpu_stream->channels_max);
414 hw->formats &= formats & cpu_stream->formats;
416 hw->formats = formats & cpu_stream->formats;
417 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
419 snd_pcm_limit_hw_rates(runtime);
421 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
422 hw->rate_min = max(hw->rate_min, rate_min);
423 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
424 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
427 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
428 struct snd_soc_component **last)
430 struct snd_soc_pcm_runtime *rtd = substream->private_data;
431 struct snd_soc_rtdcom_list *rtdcom;
432 struct snd_soc_component *component;
435 for_each_rtd_components(rtd, rtdcom, component) {
438 ret = snd_soc_component_module_get_when_open(component);
440 dev_err(component->dev,
441 "ASoC: can't get module %s\n",
446 ret = snd_soc_component_open(component, substream);
448 dev_err(component->dev,
449 "ASoC: can't open component %s: %d\n",
450 component->name, ret);
458 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
459 struct snd_soc_component *last)
461 struct snd_soc_pcm_runtime *rtd = substream->private_data;
462 struct snd_soc_rtdcom_list *rtdcom;
463 struct snd_soc_component *component;
466 for_each_rtd_components(rtd, rtdcom, component) {
467 if (component == last)
470 ret |= snd_soc_component_close(component, substream);
471 snd_soc_component_module_put_when_close(component);
478 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
479 * then initialized and any private data can be allocated. This also calls
480 * startup for the cpu DAI, component, machine and codec DAI.
482 static int soc_pcm_open(struct snd_pcm_substream *substream)
484 struct snd_soc_pcm_runtime *rtd = substream->private_data;
485 struct snd_pcm_runtime *runtime = substream->runtime;
486 struct snd_soc_component *component;
487 struct snd_soc_rtdcom_list *rtdcom;
488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
489 struct snd_soc_dai *codec_dai;
490 const char *codec_dai_name = "multicodec";
493 pinctrl_pm_select_default_state(cpu_dai->dev);
494 for_each_rtd_codec_dai(rtd, i, codec_dai)
495 pinctrl_pm_select_default_state(codec_dai->dev);
497 for_each_rtd_components(rtd, rtdcom, component) {
498 pm_runtime_get_sync(component->dev);
501 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
503 /* startup the audio subsystem */
504 ret = snd_soc_dai_startup(cpu_dai, substream);
506 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
511 ret = soc_pcm_components_open(substream, &component);
515 for_each_rtd_codec_dai(rtd, i, codec_dai) {
516 ret = snd_soc_dai_startup(codec_dai, substream);
518 dev_err(codec_dai->dev,
519 "ASoC: can't open codec %s: %d\n",
520 codec_dai->name, ret);
524 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
525 codec_dai->tx_mask = 0;
527 codec_dai->rx_mask = 0;
530 if (rtd->dai_link->ops->startup) {
531 ret = rtd->dai_link->ops->startup(substream);
533 pr_err("ASoC: %s startup failed: %d\n",
534 rtd->dai_link->name, ret);
539 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
540 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
543 /* Check that the codec and cpu DAIs are compatible */
544 soc_pcm_init_runtime_hw(substream);
546 if (rtd->num_codecs == 1)
547 codec_dai_name = rtd->codec_dai->name;
549 if (soc_pcm_has_symmetry(substream))
550 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
553 if (!runtime->hw.rates) {
554 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
555 codec_dai_name, cpu_dai->name);
558 if (!runtime->hw.formats) {
559 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
560 codec_dai_name, cpu_dai->name);
563 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
564 runtime->hw.channels_min > runtime->hw.channels_max) {
565 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
566 codec_dai_name, cpu_dai->name);
570 soc_pcm_apply_msb(substream);
572 /* Symmetry only applies if we've already got an active stream. */
573 if (cpu_dai->active) {
574 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
579 for_each_rtd_codec_dai(rtd, i, codec_dai) {
580 if (codec_dai->active) {
581 ret = soc_pcm_apply_symmetry(substream, codec_dai);
587 pr_debug("ASoC: %s <-> %s info:\n",
588 codec_dai_name, cpu_dai->name);
589 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
590 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
591 runtime->hw.channels_max);
592 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
593 runtime->hw.rate_max);
597 snd_soc_runtime_activate(rtd, substream->stream);
599 mutex_unlock(&rtd->card->pcm_mutex);
603 if (rtd->dai_link->ops->shutdown)
604 rtd->dai_link->ops->shutdown(substream);
610 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
611 snd_soc_dai_shutdown(codec_dai, substream);
614 soc_pcm_components_close(substream, component);
616 snd_soc_dai_shutdown(cpu_dai, substream);
618 mutex_unlock(&rtd->card->pcm_mutex);
620 for_each_rtd_components(rtd, rtdcom, component) {
621 pm_runtime_mark_last_busy(component->dev);
622 pm_runtime_put_autosuspend(component->dev);
625 for_each_rtd_codec_dai(rtd, i, codec_dai) {
626 if (!codec_dai->active)
627 pinctrl_pm_select_sleep_state(codec_dai->dev);
629 if (!cpu_dai->active)
630 pinctrl_pm_select_sleep_state(cpu_dai->dev);
636 * Power down the audio subsystem pmdown_time msecs after close is called.
637 * This is to ensure there are no pops or clicks in between any music tracks
638 * due to DAPM power cycling.
640 static void close_delayed_work(struct work_struct *work)
642 struct snd_soc_pcm_runtime *rtd =
643 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
644 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
646 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
648 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
649 codec_dai->driver->playback.stream_name,
650 codec_dai->playback_active ? "active" : "inactive",
651 rtd->pop_wait ? "yes" : "no");
653 /* are we waiting on this codec DAI stream */
654 if (rtd->pop_wait == 1) {
656 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
657 SND_SOC_DAPM_STREAM_STOP);
660 mutex_unlock(&rtd->card->pcm_mutex);
663 static void codec2codec_close_delayed_work(struct work_struct *work)
666 * Currently nothing to do for c2c links
667 * Since c2c links are internal nodes in the DAPM graph and
668 * don't interface with the outside world or application layer
669 * we don't have to do any special handling on close.
674 * Called by ALSA when a PCM substream is closed. Private data can be
675 * freed here. The cpu DAI, codec DAI, machine and components are also
678 static int soc_pcm_close(struct snd_pcm_substream *substream)
680 struct snd_soc_pcm_runtime *rtd = substream->private_data;
681 struct snd_soc_component *component;
682 struct snd_soc_rtdcom_list *rtdcom;
683 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
684 struct snd_soc_dai *codec_dai;
687 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
689 snd_soc_runtime_deactivate(rtd, substream->stream);
691 /* clear the corresponding DAIs rate when inactive */
692 if (!cpu_dai->active)
695 for_each_rtd_codec_dai(rtd, i, codec_dai) {
696 if (!codec_dai->active)
700 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
702 snd_soc_dai_shutdown(cpu_dai, substream);
704 for_each_rtd_codec_dai(rtd, i, codec_dai)
705 snd_soc_dai_shutdown(codec_dai, substream);
707 if (rtd->dai_link->ops->shutdown)
708 rtd->dai_link->ops->shutdown(substream);
710 soc_pcm_components_close(substream, NULL);
712 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
713 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
714 /* powered down playback stream now */
715 snd_soc_dapm_stream_event(rtd,
716 SNDRV_PCM_STREAM_PLAYBACK,
717 SND_SOC_DAPM_STREAM_STOP);
719 /* start delayed pop wq here for playback streams */
721 queue_delayed_work(system_power_efficient_wq,
723 msecs_to_jiffies(rtd->pmdown_time));
726 /* capture streams can be powered down now */
727 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
728 SND_SOC_DAPM_STREAM_STOP);
731 mutex_unlock(&rtd->card->pcm_mutex);
733 for_each_rtd_components(rtd, rtdcom, component) {
734 pm_runtime_mark_last_busy(component->dev);
735 pm_runtime_put_autosuspend(component->dev);
738 for_each_rtd_codec_dai(rtd, i, codec_dai) {
739 if (!codec_dai->active)
740 pinctrl_pm_select_sleep_state(codec_dai->dev);
742 if (!cpu_dai->active)
743 pinctrl_pm_select_sleep_state(cpu_dai->dev);
749 * Called by ALSA when the PCM substream is prepared, can set format, sample
750 * rate, etc. This function is non atomic and can be called multiple times,
751 * it can refer to the runtime info.
753 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
755 struct snd_soc_pcm_runtime *rtd = substream->private_data;
756 struct snd_soc_component *component;
757 struct snd_soc_rtdcom_list *rtdcom;
758 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
759 struct snd_soc_dai *codec_dai;
762 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
764 if (rtd->dai_link->ops->prepare) {
765 ret = rtd->dai_link->ops->prepare(substream);
767 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
773 for_each_rtd_components(rtd, rtdcom, component) {
774 ret = snd_soc_component_prepare(component, substream);
776 dev_err(component->dev,
777 "ASoC: platform prepare error: %d\n", ret);
782 for_each_rtd_codec_dai(rtd, i, codec_dai) {
783 ret = snd_soc_dai_prepare(codec_dai, substream);
785 dev_err(codec_dai->dev,
786 "ASoC: codec DAI prepare error: %d\n",
792 ret = snd_soc_dai_prepare(cpu_dai, substream);
794 dev_err(cpu_dai->dev,
795 "ASoC: cpu DAI prepare error: %d\n", ret);
799 /* cancel any delayed stream shutdown that is pending */
800 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
803 cancel_delayed_work(&rtd->delayed_work);
806 snd_soc_dapm_stream_event(rtd, substream->stream,
807 SND_SOC_DAPM_STREAM_START);
809 for_each_rtd_codec_dai(rtd, i, codec_dai)
810 snd_soc_dai_digital_mute(codec_dai, 0,
812 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
815 mutex_unlock(&rtd->card->pcm_mutex);
819 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
822 struct snd_interval *interval;
823 int channels = hweight_long(mask);
825 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
826 interval->min = channels;
827 interval->max = channels;
830 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
831 struct snd_soc_component *last)
833 struct snd_soc_pcm_runtime *rtd = substream->private_data;
834 struct snd_soc_rtdcom_list *rtdcom;
835 struct snd_soc_component *component;
838 for_each_rtd_components(rtd, rtdcom, component) {
839 if (component == last)
842 ret |= snd_soc_component_hw_free(component, substream);
849 * Called by ALSA when the hardware params are set by application. This
850 * function can also be called multiple times and can allocate buffers
851 * (using snd_pcm_lib_* ). It's non-atomic.
853 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
854 struct snd_pcm_hw_params *params)
856 struct snd_soc_pcm_runtime *rtd = substream->private_data;
857 struct snd_soc_component *component;
858 struct snd_soc_rtdcom_list *rtdcom;
859 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
860 struct snd_soc_dai *codec_dai;
863 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
865 ret = soc_pcm_params_symmetry(substream, params);
869 if (rtd->dai_link->ops->hw_params) {
870 ret = rtd->dai_link->ops->hw_params(substream, params);
872 dev_err(rtd->card->dev, "ASoC: machine hw_params"
873 " failed: %d\n", ret);
878 for_each_rtd_codec_dai(rtd, i, codec_dai) {
879 struct snd_pcm_hw_params codec_params;
882 * Skip CODECs which don't support the current stream type,
883 * the idea being that if a CODEC is not used for the currently
884 * set up transfer direction, it should not need to be
885 * configured, especially since the configuration used might
886 * not even be supported by that CODEC. There may be cases
887 * however where a CODEC needs to be set up although it is
888 * actually not being used for the transfer, e.g. if a
889 * capture-only CODEC is acting as an LRCLK and/or BCLK master
890 * for the DAI link including a playback-only CODEC.
891 * If this becomes necessary, we will have to augment the
892 * machine driver setup with information on how to act, so
893 * we can do the right thing here.
895 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
898 /* copy params for each codec */
899 codec_params = *params;
901 /* fixup params based on TDM slot masks */
902 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
904 soc_pcm_codec_params_fixup(&codec_params,
907 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
909 soc_pcm_codec_params_fixup(&codec_params,
912 ret = snd_soc_dai_hw_params(codec_dai, substream,
917 codec_dai->rate = params_rate(&codec_params);
918 codec_dai->channels = params_channels(&codec_params);
919 codec_dai->sample_bits = snd_pcm_format_physical_width(
920 params_format(&codec_params));
922 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
925 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
929 /* store the parameters for each DAIs */
930 cpu_dai->rate = params_rate(params);
931 cpu_dai->channels = params_channels(params);
932 cpu_dai->sample_bits =
933 snd_pcm_format_physical_width(params_format(params));
935 snd_soc_dapm_update_dai(substream, params, cpu_dai);
937 for_each_rtd_components(rtd, rtdcom, component) {
938 ret = snd_soc_component_hw_params(component, substream, params);
940 dev_err(component->dev,
941 "ASoC: %s hw params failed: %d\n",
942 component->name, ret);
949 mutex_unlock(&rtd->card->pcm_mutex);
953 soc_pcm_components_hw_free(substream, component);
955 snd_soc_dai_hw_free(cpu_dai, substream);
962 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
963 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
966 snd_soc_dai_hw_free(codec_dai, substream);
970 if (rtd->dai_link->ops->hw_free)
971 rtd->dai_link->ops->hw_free(substream);
973 mutex_unlock(&rtd->card->pcm_mutex);
978 * Frees resources allocated by hw_params, can be called multiple times
980 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
982 struct snd_soc_pcm_runtime *rtd = substream->private_data;
983 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
984 struct snd_soc_dai *codec_dai;
985 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
988 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
990 /* clear the corresponding DAIs parameters when going to be inactive */
991 if (cpu_dai->active == 1) {
993 cpu_dai->channels = 0;
994 cpu_dai->sample_bits = 0;
997 for_each_rtd_codec_dai(rtd, i, codec_dai) {
998 if (codec_dai->active == 1) {
1000 codec_dai->channels = 0;
1001 codec_dai->sample_bits = 0;
1005 /* apply codec digital mute */
1006 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1007 if ((playback && codec_dai->playback_active == 1) ||
1008 (!playback && codec_dai->capture_active == 1))
1009 snd_soc_dai_digital_mute(codec_dai, 1,
1013 /* free any machine hw params */
1014 if (rtd->dai_link->ops->hw_free)
1015 rtd->dai_link->ops->hw_free(substream);
1017 /* free any component resources */
1018 soc_pcm_components_hw_free(substream, NULL);
1020 /* now free hw params for the DAIs */
1021 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1022 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1025 snd_soc_dai_hw_free(codec_dai, substream);
1028 snd_soc_dai_hw_free(cpu_dai, substream);
1030 mutex_unlock(&rtd->card->pcm_mutex);
1034 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1036 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1037 struct snd_soc_component *component;
1038 struct snd_soc_rtdcom_list *rtdcom;
1039 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1040 struct snd_soc_dai *codec_dai;
1043 if (rtd->dai_link->ops->trigger) {
1044 ret = rtd->dai_link->ops->trigger(substream, cmd);
1049 for_each_rtd_components(rtd, rtdcom, component) {
1050 ret = snd_soc_component_trigger(component, substream, cmd);
1055 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1059 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1060 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1068 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1070 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1071 struct snd_soc_component *component;
1072 struct snd_soc_rtdcom_list *rtdcom;
1073 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1074 struct snd_soc_dai *codec_dai;
1077 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1078 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1083 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1087 for_each_rtd_components(rtd, rtdcom, component) {
1088 ret = snd_soc_component_trigger(component, substream, cmd);
1093 if (rtd->dai_link->ops->trigger) {
1094 ret = rtd->dai_link->ops->trigger(substream, cmd);
1102 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1107 case SNDRV_PCM_TRIGGER_START:
1108 case SNDRV_PCM_TRIGGER_RESUME:
1109 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1110 ret = soc_pcm_trigger_start(substream, cmd);
1112 case SNDRV_PCM_TRIGGER_STOP:
1113 case SNDRV_PCM_TRIGGER_SUSPEND:
1114 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1115 ret = soc_pcm_trigger_stop(substream, cmd);
1124 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1127 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1128 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1129 struct snd_soc_dai *codec_dai;
1132 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1133 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1138 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1145 * soc level wrapper for pointer callback
1146 * If cpu_dai, codec_dai, component driver has the delay callback, then
1147 * the runtime->delay will be updated accordingly.
1149 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1151 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1152 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1153 struct snd_soc_dai *codec_dai;
1154 struct snd_pcm_runtime *runtime = substream->runtime;
1155 snd_pcm_uframes_t offset = 0;
1156 snd_pcm_sframes_t delay = 0;
1157 snd_pcm_sframes_t codec_delay = 0;
1160 /* clearing the previous total delay */
1163 offset = snd_soc_pcm_component_pointer(substream);
1165 /* base delay if assigned in pointer callback */
1166 delay = runtime->delay;
1168 delay += snd_soc_dai_delay(cpu_dai, substream);
1170 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1171 codec_delay = max(codec_delay,
1172 snd_soc_dai_delay(codec_dai, substream));
1174 delay += codec_delay;
1176 runtime->delay = delay;
1181 /* connect a FE and BE */
1182 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1183 struct snd_soc_pcm_runtime *be, int stream)
1185 struct snd_soc_dpcm *dpcm;
1186 unsigned long flags;
1187 #ifdef CONFIG_DEBUG_FS
1191 /* only add new dpcms */
1192 for_each_dpcm_be(fe, stream, dpcm) {
1193 if (dpcm->be == be && dpcm->fe == fe)
1197 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1203 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1204 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1205 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1206 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1207 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1208 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1210 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1211 stream ? "capture" : "playback", fe->dai_link->name,
1212 stream ? "<-" : "->", be->dai_link->name);
1214 #ifdef CONFIG_DEBUG_FS
1215 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1216 stream ? "capture" : "playback");
1218 dpcm->debugfs_state = debugfs_create_dir(name,
1219 fe->debugfs_dpcm_root);
1220 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1228 /* reparent a BE onto another FE */
1229 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1230 struct snd_soc_pcm_runtime *be, int stream)
1232 struct snd_soc_dpcm *dpcm;
1233 struct snd_pcm_substream *fe_substream, *be_substream;
1235 /* reparent if BE is connected to other FEs */
1236 if (!be->dpcm[stream].users)
1239 be_substream = snd_soc_dpcm_get_substream(be, stream);
1241 for_each_dpcm_fe(be, stream, dpcm) {
1245 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1246 stream ? "capture" : "playback",
1247 dpcm->fe->dai_link->name,
1248 stream ? "<-" : "->", dpcm->be->dai_link->name);
1250 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1251 be_substream->runtime = fe_substream->runtime;
1256 /* disconnect a BE and FE */
1257 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1259 struct snd_soc_dpcm *dpcm, *d;
1260 unsigned long flags;
1262 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1263 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1264 stream ? "capture" : "playback",
1265 dpcm->be->dai_link->name);
1267 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1270 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1271 stream ? "capture" : "playback", fe->dai_link->name,
1272 stream ? "<-" : "->", dpcm->be->dai_link->name);
1274 /* BEs still alive need new FE */
1275 dpcm_be_reparent(fe, dpcm->be, stream);
1277 #ifdef CONFIG_DEBUG_FS
1278 debugfs_remove_recursive(dpcm->debugfs_state);
1280 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1281 list_del(&dpcm->list_be);
1282 list_del(&dpcm->list_fe);
1283 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1288 /* get BE for DAI widget and stream */
1289 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1290 struct snd_soc_dapm_widget *widget, int stream)
1292 struct snd_soc_pcm_runtime *be;
1293 struct snd_soc_dai *dai;
1296 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1298 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1299 for_each_card_rtds(card, be) {
1301 if (!be->dai_link->no_pcm)
1304 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1305 be->cpu_dai->playback_widget ?
1306 be->cpu_dai->playback_widget->name : "(not set)");
1308 if (be->cpu_dai->playback_widget == widget)
1311 for_each_rtd_codec_dai(be, i, dai) {
1312 if (dai->playback_widget == widget)
1318 for_each_card_rtds(card, be) {
1320 if (!be->dai_link->no_pcm)
1323 dev_dbg(card->dev, "ASoC: try BE %s\n",
1324 be->cpu_dai->capture_widget ?
1325 be->cpu_dai->capture_widget->name : "(not set)");
1327 if (be->cpu_dai->capture_widget == widget)
1330 for_each_rtd_codec_dai(be, i, dai) {
1331 if (dai->capture_widget == widget)
1337 /* dai link name and stream name set correctly ? */
1338 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1339 stream ? "capture" : "playback", widget->name);
1343 static inline struct snd_soc_dapm_widget *
1344 dai_get_widget(struct snd_soc_dai *dai, int stream)
1346 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1347 return dai->playback_widget;
1349 return dai->capture_widget;
1352 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1353 struct snd_soc_dapm_widget *widget)
1357 for (i = 0; i < list->num_widgets; i++) {
1358 if (widget == list->widgets[i])
1365 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1366 enum snd_soc_dapm_direction dir)
1368 struct snd_soc_card *card = widget->dapm->card;
1369 struct snd_soc_pcm_runtime *rtd;
1370 struct snd_soc_dai *dai;
1373 if (dir == SND_SOC_DAPM_DIR_OUT) {
1374 for_each_card_rtds(card, rtd) {
1375 if (!rtd->dai_link->no_pcm)
1378 if (rtd->cpu_dai->playback_widget == widget)
1381 for_each_rtd_codec_dai(rtd, i, dai) {
1382 if (dai->playback_widget == widget)
1386 } else { /* SND_SOC_DAPM_DIR_IN */
1387 for_each_card_rtds(card, rtd) {
1388 if (!rtd->dai_link->no_pcm)
1391 if (rtd->cpu_dai->capture_widget == widget)
1394 for_each_rtd_codec_dai(rtd, i, dai) {
1395 if (dai->capture_widget == widget)
1404 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1405 int stream, struct snd_soc_dapm_widget_list **list)
1407 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1410 /* get number of valid DAI paths and their widgets */
1411 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1412 dpcm_end_walk_at_be);
1414 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1415 stream ? "capture" : "playback");
1420 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1421 struct snd_soc_dapm_widget_list **list_)
1423 struct snd_soc_dpcm *dpcm;
1424 struct snd_soc_dapm_widget_list *list = *list_;
1425 struct snd_soc_dapm_widget *widget;
1426 struct snd_soc_dai *dai;
1430 /* Destroy any old FE <--> BE connections */
1431 for_each_dpcm_be(fe, stream, dpcm) {
1434 /* is there a valid CPU DAI widget for this BE */
1435 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1437 /* prune the BE if it's no longer in our active list */
1438 if (widget && widget_in_list(list, widget))
1441 /* is there a valid CODEC DAI widget for this BE */
1443 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1444 widget = dai_get_widget(dai, stream);
1446 /* prune the BE if it's no longer in our active list */
1447 if (widget && widget_in_list(list, widget))
1453 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1454 stream ? "capture" : "playback",
1455 dpcm->be->dai_link->name, fe->dai_link->name);
1456 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1457 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1461 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1465 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1466 struct snd_soc_dapm_widget_list **list_)
1468 struct snd_soc_card *card = fe->card;
1469 struct snd_soc_dapm_widget_list *list = *list_;
1470 struct snd_soc_pcm_runtime *be;
1471 int i, new = 0, err;
1473 /* Create any new FE <--> BE connections */
1474 for (i = 0; i < list->num_widgets; i++) {
1476 switch (list->widgets[i]->id) {
1477 case snd_soc_dapm_dai_in:
1478 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1481 case snd_soc_dapm_dai_out:
1482 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1489 /* is there a valid BE rtd for this widget */
1490 be = dpcm_get_be(card, list->widgets[i], stream);
1492 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1493 list->widgets[i]->name);
1497 /* make sure BE is a real BE */
1498 if (!be->dai_link->no_pcm)
1501 /* don't connect if FE is not running */
1502 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1505 /* newly connected FE and BE */
1506 err = dpcm_be_connect(fe, be, stream);
1508 dev_err(fe->dev, "ASoC: can't connect %s\n",
1509 list->widgets[i]->name);
1511 } else if (err == 0) /* already connected */
1515 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1519 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1524 * Find the corresponding BE DAIs that source or sink audio to this
1527 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1528 int stream, struct snd_soc_dapm_widget_list **list, int new)
1531 return dpcm_add_paths(fe, stream, list);
1533 return dpcm_prune_paths(fe, stream, list);
1536 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1538 struct snd_soc_dpcm *dpcm;
1539 unsigned long flags;
1541 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1542 for_each_dpcm_be(fe, stream, dpcm)
1543 dpcm->be->dpcm[stream].runtime_update =
1544 SND_SOC_DPCM_UPDATE_NO;
1545 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1548 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1551 struct snd_soc_dpcm *dpcm;
1553 /* disable any enabled and non active backends */
1554 for_each_dpcm_be(fe, stream, dpcm) {
1556 struct snd_soc_pcm_runtime *be = dpcm->be;
1557 struct snd_pcm_substream *be_substream =
1558 snd_soc_dpcm_get_substream(be, stream);
1560 if (be->dpcm[stream].users == 0)
1561 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1562 stream ? "capture" : "playback",
1563 be->dpcm[stream].state);
1565 if (--be->dpcm[stream].users != 0)
1568 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1571 soc_pcm_close(be_substream);
1572 be_substream->runtime = NULL;
1573 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1577 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1579 struct snd_soc_dpcm *dpcm;
1582 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1583 for_each_dpcm_be(fe, stream, dpcm) {
1585 struct snd_soc_pcm_runtime *be = dpcm->be;
1586 struct snd_pcm_substream *be_substream =
1587 snd_soc_dpcm_get_substream(be, stream);
1589 if (!be_substream) {
1590 dev_err(be->dev, "ASoC: no backend %s stream\n",
1591 stream ? "capture" : "playback");
1595 /* is this op for this BE ? */
1596 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1599 /* first time the dpcm is open ? */
1600 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1601 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1602 stream ? "capture" : "playback",
1603 be->dpcm[stream].state);
1605 if (be->dpcm[stream].users++ != 0)
1608 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1609 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1612 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1613 stream ? "capture" : "playback", be->dai_link->name);
1615 be_substream->runtime = be->dpcm[stream].runtime;
1616 err = soc_pcm_open(be_substream);
1618 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1619 be->dpcm[stream].users--;
1620 if (be->dpcm[stream].users < 0)
1621 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1622 stream ? "capture" : "playback",
1623 be->dpcm[stream].state);
1625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1636 /* disable any enabled and non active backends */
1637 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1638 struct snd_soc_pcm_runtime *be = dpcm->be;
1639 struct snd_pcm_substream *be_substream =
1640 snd_soc_dpcm_get_substream(be, stream);
1642 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1645 if (be->dpcm[stream].users == 0)
1646 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1647 stream ? "capture" : "playback",
1648 be->dpcm[stream].state);
1650 if (--be->dpcm[stream].users != 0)
1653 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1656 soc_pcm_close(be_substream);
1657 be_substream->runtime = NULL;
1658 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1664 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1665 struct snd_soc_pcm_stream *stream)
1667 runtime->hw.rate_min = stream->rate_min;
1668 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1669 runtime->hw.channels_min = stream->channels_min;
1670 runtime->hw.channels_max = stream->channels_max;
1671 if (runtime->hw.formats)
1672 runtime->hw.formats &= stream->formats;
1674 runtime->hw.formats = stream->formats;
1675 runtime->hw.rates = stream->rates;
1678 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1681 struct snd_soc_pcm_runtime *fe = substream->private_data;
1682 struct snd_soc_dpcm *dpcm;
1683 struct snd_soc_dai *dai;
1684 int stream = substream->stream;
1686 if (!fe->dai_link->dpcm_merged_format)
1690 * It returns merged BE codec format
1691 * if FE want to use it (= dpcm_merged_format)
1694 for_each_dpcm_be(fe, stream, dpcm) {
1695 struct snd_soc_pcm_runtime *be = dpcm->be;
1696 struct snd_soc_dai_driver *codec_dai_drv;
1697 struct snd_soc_pcm_stream *codec_stream;
1700 for_each_rtd_codec_dai(be, i, dai) {
1702 * Skip CODECs which don't support the current stream
1703 * type. See soc_pcm_init_runtime_hw() for more details
1705 if (!snd_soc_dai_stream_valid(dai, stream))
1708 codec_dai_drv = dai->driver;
1709 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1710 codec_stream = &codec_dai_drv->playback;
1712 codec_stream = &codec_dai_drv->capture;
1714 *formats &= codec_stream->formats;
1719 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1720 unsigned int *channels_min,
1721 unsigned int *channels_max)
1723 struct snd_soc_pcm_runtime *fe = substream->private_data;
1724 struct snd_soc_dpcm *dpcm;
1725 int stream = substream->stream;
1727 if (!fe->dai_link->dpcm_merged_chan)
1731 * It returns merged BE codec channel;
1732 * if FE want to use it (= dpcm_merged_chan)
1735 for_each_dpcm_be(fe, stream, dpcm) {
1736 struct snd_soc_pcm_runtime *be = dpcm->be;
1737 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1738 struct snd_soc_dai_driver *codec_dai_drv;
1739 struct snd_soc_pcm_stream *codec_stream;
1740 struct snd_soc_pcm_stream *cpu_stream;
1742 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1743 cpu_stream = &cpu_dai_drv->playback;
1745 cpu_stream = &cpu_dai_drv->capture;
1747 *channels_min = max(*channels_min, cpu_stream->channels_min);
1748 *channels_max = min(*channels_max, cpu_stream->channels_max);
1751 * chan min/max cannot be enforced if there are multiple CODEC
1752 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1754 if (be->num_codecs == 1) {
1755 codec_dai_drv = be->codec_dais[0]->driver;
1757 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1758 codec_stream = &codec_dai_drv->playback;
1760 codec_stream = &codec_dai_drv->capture;
1762 *channels_min = max(*channels_min,
1763 codec_stream->channels_min);
1764 *channels_max = min(*channels_max,
1765 codec_stream->channels_max);
1770 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1771 unsigned int *rates,
1772 unsigned int *rate_min,
1773 unsigned int *rate_max)
1775 struct snd_soc_pcm_runtime *fe = substream->private_data;
1776 struct snd_soc_dpcm *dpcm;
1777 int stream = substream->stream;
1779 if (!fe->dai_link->dpcm_merged_rate)
1783 * It returns merged BE codec channel;
1784 * if FE want to use it (= dpcm_merged_chan)
1787 for_each_dpcm_be(fe, stream, dpcm) {
1788 struct snd_soc_pcm_runtime *be = dpcm->be;
1789 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1790 struct snd_soc_dai_driver *codec_dai_drv;
1791 struct snd_soc_pcm_stream *codec_stream;
1792 struct snd_soc_pcm_stream *cpu_stream;
1793 struct snd_soc_dai *dai;
1796 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1797 cpu_stream = &cpu_dai_drv->playback;
1799 cpu_stream = &cpu_dai_drv->capture;
1801 *rate_min = max(*rate_min, cpu_stream->rate_min);
1802 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1803 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1805 for_each_rtd_codec_dai(be, i, dai) {
1807 * Skip CODECs which don't support the current stream
1808 * type. See soc_pcm_init_runtime_hw() for more details
1810 if (!snd_soc_dai_stream_valid(dai, stream))
1813 codec_dai_drv = dai->driver;
1814 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1815 codec_stream = &codec_dai_drv->playback;
1817 codec_stream = &codec_dai_drv->capture;
1819 *rate_min = max(*rate_min, codec_stream->rate_min);
1820 *rate_max = min_not_zero(*rate_max,
1821 codec_stream->rate_max);
1822 *rates = snd_pcm_rate_mask_intersect(*rates,
1823 codec_stream->rates);
1828 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1830 struct snd_pcm_runtime *runtime = substream->runtime;
1831 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1832 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1833 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1836 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1838 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1840 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1841 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1842 &runtime->hw.channels_max);
1843 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1844 &runtime->hw.rate_min, &runtime->hw.rate_max);
1847 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1849 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1850 * for avoiding the race with trigger callback.
1851 * If the state is unset and a trigger is pending while the previous operation,
1852 * process the pending trigger action here.
1854 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1855 int stream, enum snd_soc_dpcm_update state)
1857 struct snd_pcm_substream *substream =
1858 snd_soc_dpcm_get_substream(fe, stream);
1860 snd_pcm_stream_lock_irq(substream);
1861 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1862 dpcm_fe_dai_do_trigger(substream,
1863 fe->dpcm[stream].trigger_pending - 1);
1864 fe->dpcm[stream].trigger_pending = 0;
1866 fe->dpcm[stream].runtime_update = state;
1867 snd_pcm_stream_unlock_irq(substream);
1870 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1873 struct snd_soc_dpcm *dpcm;
1874 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1875 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1878 /* apply symmetry for FE */
1879 if (soc_pcm_has_symmetry(fe_substream))
1880 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1882 /* Symmetry only applies if we've got an active stream. */
1883 if (fe_cpu_dai->active) {
1884 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1889 /* apply symmetry for BE */
1890 for_each_dpcm_be(fe, stream, dpcm) {
1891 struct snd_soc_pcm_runtime *be = dpcm->be;
1892 struct snd_pcm_substream *be_substream =
1893 snd_soc_dpcm_get_substream(be, stream);
1894 struct snd_soc_pcm_runtime *rtd;
1895 struct snd_soc_dai *codec_dai;
1898 /* A backend may not have the requested substream */
1902 rtd = be_substream->private_data;
1903 if (rtd->dai_link->be_hw_params_fixup)
1906 if (soc_pcm_has_symmetry(be_substream))
1907 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1909 /* Symmetry only applies if we've got an active stream. */
1910 if (rtd->cpu_dai->active) {
1911 err = soc_pcm_apply_symmetry(fe_substream,
1917 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1918 if (codec_dai->active) {
1919 err = soc_pcm_apply_symmetry(fe_substream,
1930 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1932 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1933 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1934 int stream = fe_substream->stream, ret = 0;
1936 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1938 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1940 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1944 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1946 /* start the DAI frontend */
1947 ret = soc_pcm_open(fe_substream);
1949 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1953 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1955 dpcm_set_fe_runtime(fe_substream);
1956 snd_pcm_limit_hw_rates(runtime);
1958 ret = dpcm_apply_symmetry(fe_substream, stream);
1960 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1965 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1969 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1971 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1975 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1977 struct snd_soc_dpcm *dpcm;
1979 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1980 for_each_dpcm_be(fe, stream, dpcm) {
1982 struct snd_soc_pcm_runtime *be = dpcm->be;
1983 struct snd_pcm_substream *be_substream =
1984 snd_soc_dpcm_get_substream(be, stream);
1986 /* is this op for this BE ? */
1987 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1990 if (be->dpcm[stream].users == 0)
1991 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1992 stream ? "capture" : "playback",
1993 be->dpcm[stream].state);
1995 if (--be->dpcm[stream].users != 0)
1998 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1999 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2000 soc_pcm_hw_free(be_substream);
2001 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2004 dev_dbg(be->dev, "ASoC: close BE %s\n",
2005 be->dai_link->name);
2007 soc_pcm_close(be_substream);
2008 be_substream->runtime = NULL;
2010 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2015 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2017 struct snd_soc_pcm_runtime *fe = substream->private_data;
2018 int stream = substream->stream;
2020 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2022 /* shutdown the BEs */
2023 dpcm_be_dai_shutdown(fe, substream->stream);
2025 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2027 /* now shutdown the frontend */
2028 soc_pcm_close(substream);
2030 /* run the stream event for each BE */
2031 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2033 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2034 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2038 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2040 struct snd_soc_dpcm *dpcm;
2042 /* only hw_params backends that are either sinks or sources
2043 * to this frontend DAI */
2044 for_each_dpcm_be(fe, stream, dpcm) {
2046 struct snd_soc_pcm_runtime *be = dpcm->be;
2047 struct snd_pcm_substream *be_substream =
2048 snd_soc_dpcm_get_substream(be, stream);
2050 /* is this op for this BE ? */
2051 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2054 /* only free hw when no longer used - check all FEs */
2055 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2058 /* do not free hw if this BE is used by other FE */
2059 if (be->dpcm[stream].users > 1)
2062 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2063 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2064 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2065 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2066 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2067 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2070 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2071 be->dai_link->name);
2073 soc_pcm_hw_free(be_substream);
2075 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2081 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2083 struct snd_soc_pcm_runtime *fe = substream->private_data;
2084 int err, stream = substream->stream;
2086 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2087 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2089 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2091 /* call hw_free on the frontend */
2092 err = soc_pcm_hw_free(substream);
2094 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2095 fe->dai_link->name);
2097 /* only hw_params backends that are either sinks or sources
2098 * to this frontend DAI */
2099 err = dpcm_be_dai_hw_free(fe, stream);
2101 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2102 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2104 mutex_unlock(&fe->card->mutex);
2108 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2110 struct snd_soc_dpcm *dpcm;
2113 for_each_dpcm_be(fe, stream, dpcm) {
2115 struct snd_soc_pcm_runtime *be = dpcm->be;
2116 struct snd_pcm_substream *be_substream =
2117 snd_soc_dpcm_get_substream(be, stream);
2119 /* is this op for this BE ? */
2120 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2123 /* copy params for each dpcm */
2124 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2125 sizeof(struct snd_pcm_hw_params));
2127 /* perform any hw_params fixups */
2128 if (be->dai_link->be_hw_params_fixup) {
2129 ret = be->dai_link->be_hw_params_fixup(be,
2133 "ASoC: hw_params BE fixup failed %d\n",
2139 /* copy the fixed-up hw params for BE dai */
2140 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2141 sizeof(struct snd_pcm_hw_params));
2143 /* only allow hw_params() if no connected FEs are running */
2144 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2147 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2148 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2149 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2152 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2153 be->dai_link->name);
2155 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2157 dev_err(dpcm->be->dev,
2158 "ASoC: hw_params BE failed %d\n", ret);
2162 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2167 /* disable any enabled and non active backends */
2168 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2169 struct snd_soc_pcm_runtime *be = dpcm->be;
2170 struct snd_pcm_substream *be_substream =
2171 snd_soc_dpcm_get_substream(be, stream);
2173 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2176 /* only allow hw_free() if no connected FEs are running */
2177 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2180 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2181 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2182 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2183 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2186 soc_pcm_hw_free(be_substream);
2192 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2193 struct snd_pcm_hw_params *params)
2195 struct snd_soc_pcm_runtime *fe = substream->private_data;
2196 int ret, stream = substream->stream;
2198 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2199 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2201 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2202 sizeof(struct snd_pcm_hw_params));
2203 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2205 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2209 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2210 fe->dai_link->name, params_rate(params),
2211 params_channels(params), params_format(params));
2213 /* call hw_params on the frontend */
2214 ret = soc_pcm_hw_params(substream, params);
2216 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2217 dpcm_be_dai_hw_free(fe, stream);
2219 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2222 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2223 mutex_unlock(&fe->card->mutex);
2227 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2228 struct snd_pcm_substream *substream, int cmd)
2232 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2233 dpcm->be->dai_link->name, cmd);
2235 ret = soc_pcm_trigger(substream, cmd);
2237 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2242 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2245 struct snd_soc_dpcm *dpcm;
2248 for_each_dpcm_be(fe, stream, dpcm) {
2250 struct snd_soc_pcm_runtime *be = dpcm->be;
2251 struct snd_pcm_substream *be_substream =
2252 snd_soc_dpcm_get_substream(be, stream);
2254 /* is this op for this BE ? */
2255 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2259 case SNDRV_PCM_TRIGGER_START:
2260 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2261 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2264 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2268 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2270 case SNDRV_PCM_TRIGGER_RESUME:
2271 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2274 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2278 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2280 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2281 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2284 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2288 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2290 case SNDRV_PCM_TRIGGER_STOP:
2291 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2294 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2297 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2301 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2303 case SNDRV_PCM_TRIGGER_SUSPEND:
2304 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2307 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2310 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2314 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2316 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2317 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2320 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2323 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2327 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2334 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2336 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2337 int cmd, bool fe_first)
2339 struct snd_soc_pcm_runtime *fe = substream->private_data;
2342 /* call trigger on the frontend before the backend. */
2344 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2345 fe->dai_link->name, cmd);
2347 ret = soc_pcm_trigger(substream, cmd);
2351 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2355 /* call trigger on the frontend after the backend. */
2356 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2360 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2361 fe->dai_link->name, cmd);
2363 ret = soc_pcm_trigger(substream, cmd);
2368 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2370 struct snd_soc_pcm_runtime *fe = substream->private_data;
2371 int stream = substream->stream;
2373 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2375 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2378 case SND_SOC_DPCM_TRIGGER_PRE:
2380 case SNDRV_PCM_TRIGGER_START:
2381 case SNDRV_PCM_TRIGGER_RESUME:
2382 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2383 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2385 case SNDRV_PCM_TRIGGER_STOP:
2386 case SNDRV_PCM_TRIGGER_SUSPEND:
2387 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2388 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2395 case SND_SOC_DPCM_TRIGGER_POST:
2397 case SNDRV_PCM_TRIGGER_START:
2398 case SNDRV_PCM_TRIGGER_RESUME:
2399 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2400 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2402 case SNDRV_PCM_TRIGGER_STOP:
2403 case SNDRV_PCM_TRIGGER_SUSPEND:
2404 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2405 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2412 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2413 /* bespoke trigger() - handles both FE and BEs */
2415 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2416 fe->dai_link->name, cmd);
2418 ret = soc_pcm_bespoke_trigger(substream, cmd);
2421 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2422 fe->dai_link->name);
2428 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2434 case SNDRV_PCM_TRIGGER_START:
2435 case SNDRV_PCM_TRIGGER_RESUME:
2436 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2437 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2439 case SNDRV_PCM_TRIGGER_STOP:
2440 case SNDRV_PCM_TRIGGER_SUSPEND:
2441 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2443 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2444 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2449 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2453 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2455 struct snd_soc_pcm_runtime *fe = substream->private_data;
2456 int stream = substream->stream;
2458 /* if FE's runtime_update is already set, we're in race;
2459 * process this trigger later at exit
2461 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2462 fe->dpcm[stream].trigger_pending = cmd + 1;
2463 return 0; /* delayed, assuming it's successful */
2466 /* we're alone, let's trigger */
2467 return dpcm_fe_dai_do_trigger(substream, cmd);
2470 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2472 struct snd_soc_dpcm *dpcm;
2475 for_each_dpcm_be(fe, stream, dpcm) {
2477 struct snd_soc_pcm_runtime *be = dpcm->be;
2478 struct snd_pcm_substream *be_substream =
2479 snd_soc_dpcm_get_substream(be, stream);
2481 /* is this op for this BE ? */
2482 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2485 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2486 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2487 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2488 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2491 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2492 be->dai_link->name);
2494 ret = soc_pcm_prepare(be_substream);
2496 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2501 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2506 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2508 struct snd_soc_pcm_runtime *fe = substream->private_data;
2509 int stream = substream->stream, ret = 0;
2511 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2513 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2515 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2517 /* there is no point preparing this FE if there are no BEs */
2518 if (list_empty(&fe->dpcm[stream].be_clients)) {
2519 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2520 fe->dai_link->name);
2525 ret = dpcm_be_dai_prepare(fe, substream->stream);
2529 /* call prepare on the frontend */
2530 ret = soc_pcm_prepare(substream);
2532 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2533 fe->dai_link->name);
2537 /* run the stream event for each BE */
2538 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2539 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2542 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2543 mutex_unlock(&fe->card->mutex);
2548 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2550 struct snd_pcm_substream *substream =
2551 snd_soc_dpcm_get_substream(fe, stream);
2552 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2555 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2556 stream ? "capture" : "playback", fe->dai_link->name);
2558 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2559 /* call bespoke trigger - FE takes care of all BE triggers */
2560 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2561 fe->dai_link->name);
2563 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2565 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2567 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2568 fe->dai_link->name);
2570 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2572 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2575 err = dpcm_be_dai_hw_free(fe, stream);
2577 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2579 err = dpcm_be_dai_shutdown(fe, stream);
2581 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2583 /* run the stream event for each BE */
2584 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2589 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2591 struct snd_pcm_substream *substream =
2592 snd_soc_dpcm_get_substream(fe, stream);
2593 struct snd_soc_dpcm *dpcm;
2594 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2596 unsigned long flags;
2598 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2599 stream ? "capture" : "playback", fe->dai_link->name);
2601 /* Only start the BE if the FE is ready */
2602 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2603 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2606 /* startup must always be called for new BEs */
2607 ret = dpcm_be_dai_startup(fe, stream);
2611 /* keep going if FE state is > open */
2612 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2615 ret = dpcm_be_dai_hw_params(fe, stream);
2619 /* keep going if FE state is > hw_params */
2620 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2624 ret = dpcm_be_dai_prepare(fe, stream);
2628 /* run the stream event for each BE */
2629 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2631 /* keep going if FE state is > prepare */
2632 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2633 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2636 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2637 /* call trigger on the frontend - FE takes care of all BE triggers */
2638 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2639 fe->dai_link->name);
2641 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2643 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2647 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2648 fe->dai_link->name);
2650 ret = dpcm_be_dai_trigger(fe, stream,
2651 SNDRV_PCM_TRIGGER_START);
2653 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2661 dpcm_be_dai_hw_free(fe, stream);
2663 dpcm_be_dai_shutdown(fe, stream);
2665 /* disconnect any non started BEs */
2666 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2667 for_each_dpcm_be(fe, stream, dpcm) {
2668 struct snd_soc_pcm_runtime *be = dpcm->be;
2669 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2670 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2672 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2677 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2681 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2682 ret = dpcm_run_update_startup(fe, stream);
2684 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2685 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2690 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2694 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2695 ret = dpcm_run_update_shutdown(fe, stream);
2697 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2698 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2703 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2705 struct snd_soc_dapm_widget_list *list;
2708 if (!fe->dai_link->dynamic)
2711 /* only check active links */
2712 if (!fe->cpu_dai->active)
2715 /* DAPM sync will call this to update DSP paths */
2716 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2717 new ? "new" : "old", fe->dai_link->name);
2719 /* skip if FE doesn't have playback capability */
2720 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2721 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2724 /* skip if FE isn't currently playing */
2725 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2728 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2730 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2731 fe->dai_link->name, "playback");
2735 /* update any playback paths */
2736 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2739 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2741 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2743 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2744 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2747 dpcm_path_put(&list);
2750 /* skip if FE doesn't have capture capability */
2751 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2752 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2755 /* skip if FE isn't currently capturing */
2756 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2759 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2761 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2762 fe->dai_link->name, "capture");
2766 /* update any old capture paths */
2767 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2770 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2772 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2774 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2775 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2778 dpcm_path_put(&list);
2783 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2786 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2788 struct snd_soc_pcm_runtime *fe;
2791 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2792 /* shutdown all old paths first */
2793 for_each_card_rtds(card, fe) {
2794 ret = soc_dpcm_fe_runtime_update(fe, 0);
2799 /* bring new paths up */
2800 for_each_card_rtds(card, fe) {
2801 ret = soc_dpcm_fe_runtime_update(fe, 1);
2807 mutex_unlock(&card->mutex);
2810 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2812 struct snd_soc_dpcm *dpcm;
2813 struct snd_soc_dai *dai;
2815 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2817 struct snd_soc_pcm_runtime *be = dpcm->be;
2820 if (be->dai_link->ignore_suspend)
2823 for_each_rtd_codec_dai(be, i, dai) {
2824 struct snd_soc_dai_driver *drv = dai->driver;
2826 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2827 be->dai_link->name);
2829 if (drv->ops && drv->ops->digital_mute &&
2830 dai->playback_active)
2831 drv->ops->digital_mute(dai, mute);
2838 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2840 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2841 struct snd_soc_dpcm *dpcm;
2842 struct snd_soc_dapm_widget_list *list;
2844 int stream = fe_substream->stream;
2846 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2847 fe->dpcm[stream].runtime = fe_substream->runtime;
2849 ret = dpcm_path_get(fe, stream, &list);
2851 mutex_unlock(&fe->card->mutex);
2853 } else if (ret == 0) {
2854 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2855 fe->dai_link->name, stream ? "capture" : "playback");
2858 /* calculate valid and active FE <-> BE dpcms */
2859 dpcm_process_paths(fe, stream, &list, 1);
2861 ret = dpcm_fe_dai_startup(fe_substream);
2863 /* clean up all links */
2864 for_each_dpcm_be(fe, stream, dpcm)
2865 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2867 dpcm_be_disconnect(fe, stream);
2868 fe->dpcm[stream].runtime = NULL;
2871 dpcm_clear_pending_state(fe, stream);
2872 dpcm_path_put(&list);
2873 mutex_unlock(&fe->card->mutex);
2877 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2879 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2880 struct snd_soc_dpcm *dpcm;
2881 int stream = fe_substream->stream, ret;
2883 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2884 ret = dpcm_fe_dai_shutdown(fe_substream);
2886 /* mark FE's links ready to prune */
2887 for_each_dpcm_be(fe, stream, dpcm)
2888 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2890 dpcm_be_disconnect(fe, stream);
2892 fe->dpcm[stream].runtime = NULL;
2893 mutex_unlock(&fe->card->mutex);
2897 /* create a new pcm */
2898 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2900 struct snd_soc_dai *codec_dai;
2901 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2902 struct snd_soc_rtdcom_list *rtdcom;
2903 struct snd_soc_component *component;
2904 struct snd_pcm *pcm;
2906 int ret = 0, playback = 0, capture = 0;
2909 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2910 playback = rtd->dai_link->dpcm_playback;
2911 capture = rtd->dai_link->dpcm_capture;
2913 /* Adapt stream for codec2codec links */
2914 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2915 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2916 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2917 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2919 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2920 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2921 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2923 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2924 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2928 capture = capture && cpu_capture->channels_min;
2929 playback = playback && cpu_playback->channels_min;
2932 if (rtd->dai_link->playback_only) {
2937 if (rtd->dai_link->capture_only) {
2942 /* create the PCM */
2943 if (rtd->dai_link->params) {
2944 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2945 rtd->dai_link->stream_name);
2947 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2948 playback, capture, &pcm);
2949 } else if (rtd->dai_link->no_pcm) {
2950 snprintf(new_name, sizeof(new_name), "(%s)",
2951 rtd->dai_link->stream_name);
2953 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2954 playback, capture, &pcm);
2956 if (rtd->dai_link->dynamic)
2957 snprintf(new_name, sizeof(new_name), "%s (*)",
2958 rtd->dai_link->stream_name);
2960 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2961 rtd->dai_link->stream_name,
2962 (rtd->num_codecs > 1) ?
2963 "multicodec" : rtd->codec_dai->name, num);
2965 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2969 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2970 rtd->dai_link->name);
2973 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2975 /* DAPM dai link stream work */
2976 if (rtd->dai_link->params)
2977 INIT_DELAYED_WORK(&rtd->delayed_work,
2978 codec2codec_close_delayed_work);
2980 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2982 pcm->nonatomic = rtd->dai_link->nonatomic;
2984 pcm->private_data = rtd;
2986 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2988 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2990 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2994 /* ASoC PCM operations */
2995 if (rtd->dai_link->dynamic) {
2996 rtd->ops.open = dpcm_fe_dai_open;
2997 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2998 rtd->ops.prepare = dpcm_fe_dai_prepare;
2999 rtd->ops.trigger = dpcm_fe_dai_trigger;
3000 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3001 rtd->ops.close = dpcm_fe_dai_close;
3002 rtd->ops.pointer = soc_pcm_pointer;
3004 rtd->ops.open = soc_pcm_open;
3005 rtd->ops.hw_params = soc_pcm_hw_params;
3006 rtd->ops.prepare = soc_pcm_prepare;
3007 rtd->ops.trigger = soc_pcm_trigger;
3008 rtd->ops.hw_free = soc_pcm_hw_free;
3009 rtd->ops.close = soc_pcm_close;
3010 rtd->ops.pointer = soc_pcm_pointer;
3013 for_each_rtd_components(rtd, rtdcom, component) {
3014 const struct snd_soc_component_driver *drv = component->driver;
3017 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
3019 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
3021 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
3023 rtd->ops.page = snd_soc_pcm_component_page;
3025 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3029 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3032 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3034 ret = snd_soc_pcm_component_new(rtd);
3036 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3040 pcm->no_device_suspend = true;
3042 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3043 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3048 /* is the current PCM operation for this FE ? */
3049 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3051 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3055 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3057 /* is the current PCM operation for this BE ? */
3058 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3059 struct snd_soc_pcm_runtime *be, int stream)
3061 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3062 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3063 be->dpcm[stream].runtime_update))
3067 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3069 /* get the substream for this BE */
3070 struct snd_pcm_substream *
3071 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3073 return be->pcm->streams[stream].substream;
3075 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3077 /* get the BE runtime state */
3078 enum snd_soc_dpcm_state
3079 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3081 return be->dpcm[stream].state;
3083 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3085 /* set the BE runtime state */
3086 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3087 int stream, enum snd_soc_dpcm_state state)
3089 be->dpcm[stream].state = state;
3091 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3094 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3095 * are not running, paused or suspended for the specified stream direction.
3097 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3098 struct snd_soc_pcm_runtime *be, int stream)
3100 struct snd_soc_dpcm *dpcm;
3103 unsigned long flags;
3105 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3106 for_each_dpcm_fe(be, stream, dpcm) {
3111 state = dpcm->fe->dpcm[stream].state;
3112 if (state == SND_SOC_DPCM_STATE_START ||
3113 state == SND_SOC_DPCM_STATE_PAUSED ||
3114 state == SND_SOC_DPCM_STATE_SUSPEND) {
3119 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3121 /* it's safe to free/stop this BE DAI */
3124 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3127 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3128 * running, paused or suspended for the specified stream direction.
3130 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3131 struct snd_soc_pcm_runtime *be, int stream)
3133 struct snd_soc_dpcm *dpcm;
3136 unsigned long flags;
3138 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3139 for_each_dpcm_fe(be, stream, dpcm) {
3144 state = dpcm->fe->dpcm[stream].state;
3145 if (state == SND_SOC_DPCM_STATE_START ||
3146 state == SND_SOC_DPCM_STATE_PAUSED ||
3147 state == SND_SOC_DPCM_STATE_SUSPEND ||
3148 state == SND_SOC_DPCM_STATE_PREPARE) {
3153 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3155 /* it's safe to change hw_params */
3158 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3160 #ifdef CONFIG_DEBUG_FS
3161 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3164 case SND_SOC_DPCM_STATE_NEW:
3166 case SND_SOC_DPCM_STATE_OPEN:
3168 case SND_SOC_DPCM_STATE_HW_PARAMS:
3170 case SND_SOC_DPCM_STATE_PREPARE:
3172 case SND_SOC_DPCM_STATE_START:
3174 case SND_SOC_DPCM_STATE_STOP:
3176 case SND_SOC_DPCM_STATE_SUSPEND:
3178 case SND_SOC_DPCM_STATE_PAUSED:
3180 case SND_SOC_DPCM_STATE_HW_FREE:
3182 case SND_SOC_DPCM_STATE_CLOSE:
3189 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3190 int stream, char *buf, size_t size)
3192 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3193 struct snd_soc_dpcm *dpcm;
3195 unsigned long flags;
3198 offset += snprintf(buf + offset, size - offset,
3199 "[%s - %s]\n", fe->dai_link->name,
3200 stream ? "Capture" : "Playback");
3202 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3203 dpcm_state_string(fe->dpcm[stream].state));
3205 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3206 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3207 offset += snprintf(buf + offset, size - offset,
3209 "Format = %s, Channels = %d, Rate = %d\n",
3210 snd_pcm_format_name(params_format(params)),
3211 params_channels(params),
3212 params_rate(params));
3215 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3217 if (list_empty(&fe->dpcm[stream].be_clients)) {
3218 offset += snprintf(buf + offset, size - offset,
3219 " No active DSP links\n");
3223 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3224 for_each_dpcm_be(fe, stream, dpcm) {
3225 struct snd_soc_pcm_runtime *be = dpcm->be;
3226 params = &dpcm->hw_params;
3228 offset += snprintf(buf + offset, size - offset,
3229 "- %s\n", be->dai_link->name);
3231 offset += snprintf(buf + offset, size - offset,
3233 dpcm_state_string(be->dpcm[stream].state));
3235 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3236 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3237 offset += snprintf(buf + offset, size - offset,
3238 " Hardware Params: "
3239 "Format = %s, Channels = %d, Rate = %d\n",
3240 snd_pcm_format_name(params_format(params)),
3241 params_channels(params),
3242 params_rate(params));
3244 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3249 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3250 size_t count, loff_t *ppos)
3252 struct snd_soc_pcm_runtime *fe = file->private_data;
3253 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3256 buf = kmalloc(out_count, GFP_KERNEL);
3260 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3261 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3262 buf + offset, out_count - offset);
3264 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3265 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3266 buf + offset, out_count - offset);
3268 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3274 static const struct file_operations dpcm_state_fops = {
3275 .open = simple_open,
3276 .read = dpcm_state_read_file,
3277 .llseek = default_llseek,
3280 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3285 if (!rtd->dai_link->dynamic)
3288 if (!rtd->card->debugfs_card_root)
3291 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3292 rtd->card->debugfs_card_root);
3294 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3295 rtd, &dpcm_state_fops);