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);
864 if (rtd->dai_link->ops->hw_params) {
865 ret = rtd->dai_link->ops->hw_params(substream, params);
867 dev_err(rtd->card->dev, "ASoC: machine hw_params"
868 " failed: %d\n", ret);
873 for_each_rtd_codec_dai(rtd, i, codec_dai) {
874 struct snd_pcm_hw_params codec_params;
877 * Skip CODECs which don't support the current stream type,
878 * the idea being that if a CODEC is not used for the currently
879 * set up transfer direction, it should not need to be
880 * configured, especially since the configuration used might
881 * not even be supported by that CODEC. There may be cases
882 * however where a CODEC needs to be set up although it is
883 * actually not being used for the transfer, e.g. if a
884 * capture-only CODEC is acting as an LRCLK and/or BCLK master
885 * for the DAI link including a playback-only CODEC.
886 * If this becomes necessary, we will have to augment the
887 * machine driver setup with information on how to act, so
888 * we can do the right thing here.
890 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
893 /* copy params for each codec */
894 codec_params = *params;
896 /* fixup params based on TDM slot masks */
897 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
899 soc_pcm_codec_params_fixup(&codec_params,
902 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
904 soc_pcm_codec_params_fixup(&codec_params,
907 ret = snd_soc_dai_hw_params(codec_dai, substream,
912 codec_dai->rate = params_rate(&codec_params);
913 codec_dai->channels = params_channels(&codec_params);
914 codec_dai->sample_bits = snd_pcm_format_physical_width(
915 params_format(&codec_params));
917 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
920 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
924 /* store the parameters for each DAIs */
925 cpu_dai->rate = params_rate(params);
926 cpu_dai->channels = params_channels(params);
927 cpu_dai->sample_bits =
928 snd_pcm_format_physical_width(params_format(params));
930 snd_soc_dapm_update_dai(substream, params, cpu_dai);
932 for_each_rtd_components(rtd, rtdcom, component) {
933 ret = snd_soc_component_hw_params(component, substream, params);
935 dev_err(component->dev,
936 "ASoC: %s hw params failed: %d\n",
937 component->name, ret);
943 ret = soc_pcm_params_symmetry(substream, params);
947 mutex_unlock(&rtd->card->pcm_mutex);
951 soc_pcm_components_hw_free(substream, component);
953 snd_soc_dai_hw_free(cpu_dai, substream);
960 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
964 snd_soc_dai_hw_free(codec_dai, substream);
968 if (rtd->dai_link->ops->hw_free)
969 rtd->dai_link->ops->hw_free(substream);
971 mutex_unlock(&rtd->card->pcm_mutex);
976 * Frees resources allocated by hw_params, can be called multiple times
978 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
980 struct snd_soc_pcm_runtime *rtd = substream->private_data;
981 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
982 struct snd_soc_dai *codec_dai;
983 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
986 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
988 /* clear the corresponding DAIs parameters when going to be inactive */
989 if (cpu_dai->active == 1) {
991 cpu_dai->channels = 0;
992 cpu_dai->sample_bits = 0;
995 for_each_rtd_codec_dai(rtd, i, codec_dai) {
996 if (codec_dai->active == 1) {
998 codec_dai->channels = 0;
999 codec_dai->sample_bits = 0;
1003 /* apply codec digital mute */
1004 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1005 if ((playback && codec_dai->playback_active == 1) ||
1006 (!playback && codec_dai->capture_active == 1))
1007 snd_soc_dai_digital_mute(codec_dai, 1,
1011 /* free any machine hw params */
1012 if (rtd->dai_link->ops->hw_free)
1013 rtd->dai_link->ops->hw_free(substream);
1015 /* free any component resources */
1016 soc_pcm_components_hw_free(substream, NULL);
1018 /* now free hw params for the DAIs */
1019 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1020 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1023 snd_soc_dai_hw_free(codec_dai, substream);
1026 snd_soc_dai_hw_free(cpu_dai, substream);
1028 mutex_unlock(&rtd->card->pcm_mutex);
1032 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1034 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1035 struct snd_soc_component *component;
1036 struct snd_soc_rtdcom_list *rtdcom;
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_dai *codec_dai;
1041 if (rtd->dai_link->ops->trigger) {
1042 ret = rtd->dai_link->ops->trigger(substream, cmd);
1047 for_each_rtd_components(rtd, rtdcom, component) {
1048 ret = snd_soc_component_trigger(component, substream, cmd);
1053 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1057 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1066 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1068 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1069 struct snd_soc_component *component;
1070 struct snd_soc_rtdcom_list *rtdcom;
1071 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1072 struct snd_soc_dai *codec_dai;
1075 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1076 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1081 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1085 for_each_rtd_components(rtd, rtdcom, component) {
1086 ret = snd_soc_component_trigger(component, substream, cmd);
1091 if (rtd->dai_link->ops->trigger) {
1092 ret = rtd->dai_link->ops->trigger(substream, cmd);
1100 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1105 case SNDRV_PCM_TRIGGER_START:
1106 case SNDRV_PCM_TRIGGER_RESUME:
1107 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1108 ret = soc_pcm_trigger_start(substream, cmd);
1110 case SNDRV_PCM_TRIGGER_STOP:
1111 case SNDRV_PCM_TRIGGER_SUSPEND:
1112 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1113 ret = soc_pcm_trigger_stop(substream, cmd);
1122 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1125 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1126 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1127 struct snd_soc_dai *codec_dai;
1130 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1131 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1136 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1143 * soc level wrapper for pointer callback
1144 * If cpu_dai, codec_dai, component driver has the delay callback, then
1145 * the runtime->delay will be updated accordingly.
1147 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1149 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1150 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1151 struct snd_soc_dai *codec_dai;
1152 struct snd_pcm_runtime *runtime = substream->runtime;
1153 snd_pcm_uframes_t offset = 0;
1154 snd_pcm_sframes_t delay = 0;
1155 snd_pcm_sframes_t codec_delay = 0;
1158 /* clearing the previous total delay */
1161 offset = snd_soc_pcm_component_pointer(substream);
1163 /* base delay if assigned in pointer callback */
1164 delay = runtime->delay;
1166 delay += snd_soc_dai_delay(cpu_dai, substream);
1168 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1169 codec_delay = max(codec_delay,
1170 snd_soc_dai_delay(codec_dai, substream));
1172 delay += codec_delay;
1174 runtime->delay = delay;
1179 /* connect a FE and BE */
1180 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1181 struct snd_soc_pcm_runtime *be, int stream)
1183 struct snd_soc_dpcm *dpcm;
1184 unsigned long flags;
1186 /* only add new dpcms */
1187 for_each_dpcm_be(fe, stream, dpcm) {
1188 if (dpcm->be == be && dpcm->fe == fe)
1192 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1198 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1199 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1200 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1201 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1202 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1203 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1205 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1206 stream ? "capture" : "playback", fe->dai_link->name,
1207 stream ? "<-" : "->", be->dai_link->name);
1209 #ifdef CONFIG_DEBUG_FS
1210 dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1211 fe->debugfs_dpcm_root);
1212 debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1217 /* reparent a BE onto another FE */
1218 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1219 struct snd_soc_pcm_runtime *be, int stream)
1221 struct snd_soc_dpcm *dpcm;
1222 struct snd_pcm_substream *fe_substream, *be_substream;
1224 /* reparent if BE is connected to other FEs */
1225 if (!be->dpcm[stream].users)
1228 be_substream = snd_soc_dpcm_get_substream(be, stream);
1230 for_each_dpcm_fe(be, stream, dpcm) {
1234 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1235 stream ? "capture" : "playback",
1236 dpcm->fe->dai_link->name,
1237 stream ? "<-" : "->", dpcm->be->dai_link->name);
1239 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1240 be_substream->runtime = fe_substream->runtime;
1245 /* disconnect a BE and FE */
1246 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1248 struct snd_soc_dpcm *dpcm, *d;
1249 unsigned long flags;
1251 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1252 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1253 stream ? "capture" : "playback",
1254 dpcm->be->dai_link->name);
1256 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1259 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1260 stream ? "capture" : "playback", fe->dai_link->name,
1261 stream ? "<-" : "->", dpcm->be->dai_link->name);
1263 /* BEs still alive need new FE */
1264 dpcm_be_reparent(fe, dpcm->be, stream);
1266 #ifdef CONFIG_DEBUG_FS
1267 debugfs_remove_recursive(dpcm->debugfs_state);
1269 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1270 list_del(&dpcm->list_be);
1271 list_del(&dpcm->list_fe);
1272 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1277 /* get BE for DAI widget and stream */
1278 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1279 struct snd_soc_dapm_widget *widget, int stream)
1281 struct snd_soc_pcm_runtime *be;
1282 struct snd_soc_dai *dai;
1285 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1287 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1288 for_each_card_rtds(card, be) {
1290 if (!be->dai_link->no_pcm)
1293 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1294 be->cpu_dai->playback_widget ?
1295 be->cpu_dai->playback_widget->name : "(not set)");
1297 if (be->cpu_dai->playback_widget == widget)
1300 for_each_rtd_codec_dai(be, i, dai) {
1301 if (dai->playback_widget == widget)
1307 for_each_card_rtds(card, be) {
1309 if (!be->dai_link->no_pcm)
1312 dev_dbg(card->dev, "ASoC: try BE %s\n",
1313 be->cpu_dai->capture_widget ?
1314 be->cpu_dai->capture_widget->name : "(not set)");
1316 if (be->cpu_dai->capture_widget == widget)
1319 for_each_rtd_codec_dai(be, i, dai) {
1320 if (dai->capture_widget == widget)
1326 /* dai link name and stream name set correctly ? */
1327 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1328 stream ? "capture" : "playback", widget->name);
1332 static inline struct snd_soc_dapm_widget *
1333 dai_get_widget(struct snd_soc_dai *dai, int stream)
1335 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1336 return dai->playback_widget;
1338 return dai->capture_widget;
1341 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1342 struct snd_soc_dapm_widget *widget)
1346 for (i = 0; i < list->num_widgets; i++) {
1347 if (widget == list->widgets[i])
1354 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1355 enum snd_soc_dapm_direction dir)
1357 struct snd_soc_card *card = widget->dapm->card;
1358 struct snd_soc_pcm_runtime *rtd;
1359 struct snd_soc_dai *dai;
1362 if (dir == SND_SOC_DAPM_DIR_OUT) {
1363 for_each_card_rtds(card, rtd) {
1364 if (!rtd->dai_link->no_pcm)
1367 if (rtd->cpu_dai->playback_widget == widget)
1370 for_each_rtd_codec_dai(rtd, i, dai) {
1371 if (dai->playback_widget == widget)
1375 } else { /* SND_SOC_DAPM_DIR_IN */
1376 for_each_card_rtds(card, rtd) {
1377 if (!rtd->dai_link->no_pcm)
1380 if (rtd->cpu_dai->capture_widget == widget)
1383 for_each_rtd_codec_dai(rtd, i, dai) {
1384 if (dai->capture_widget == widget)
1393 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1394 int stream, struct snd_soc_dapm_widget_list **list)
1396 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1399 /* get number of valid DAI paths and their widgets */
1400 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1401 dpcm_end_walk_at_be);
1403 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1404 stream ? "capture" : "playback");
1409 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1410 struct snd_soc_dapm_widget_list **list_)
1412 struct snd_soc_dpcm *dpcm;
1413 struct snd_soc_dapm_widget_list *list = *list_;
1414 struct snd_soc_dapm_widget *widget;
1415 struct snd_soc_dai *dai;
1419 /* Destroy any old FE <--> BE connections */
1420 for_each_dpcm_be(fe, stream, dpcm) {
1423 /* is there a valid CPU DAI widget for this BE */
1424 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1426 /* prune the BE if it's no longer in our active list */
1427 if (widget && widget_in_list(list, widget))
1430 /* is there a valid CODEC DAI widget for this BE */
1432 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1433 widget = dai_get_widget(dai, stream);
1435 /* prune the BE if it's no longer in our active list */
1436 if (widget && widget_in_list(list, widget))
1442 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1443 stream ? "capture" : "playback",
1444 dpcm->be->dai_link->name, fe->dai_link->name);
1445 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1446 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1450 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1454 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1455 struct snd_soc_dapm_widget_list **list_)
1457 struct snd_soc_card *card = fe->card;
1458 struct snd_soc_dapm_widget_list *list = *list_;
1459 struct snd_soc_pcm_runtime *be;
1460 int i, new = 0, err;
1462 /* Create any new FE <--> BE connections */
1463 for (i = 0; i < list->num_widgets; i++) {
1465 switch (list->widgets[i]->id) {
1466 case snd_soc_dapm_dai_in:
1467 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1470 case snd_soc_dapm_dai_out:
1471 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1478 /* is there a valid BE rtd for this widget */
1479 be = dpcm_get_be(card, list->widgets[i], stream);
1481 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1482 list->widgets[i]->name);
1486 /* make sure BE is a real BE */
1487 if (!be->dai_link->no_pcm)
1490 /* don't connect if FE is not running */
1491 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1494 /* newly connected FE and BE */
1495 err = dpcm_be_connect(fe, be, stream);
1497 dev_err(fe->dev, "ASoC: can't connect %s\n",
1498 list->widgets[i]->name);
1500 } else if (err == 0) /* already connected */
1504 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1508 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1513 * Find the corresponding BE DAIs that source or sink audio to this
1516 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1517 int stream, struct snd_soc_dapm_widget_list **list, int new)
1520 return dpcm_add_paths(fe, stream, list);
1522 return dpcm_prune_paths(fe, stream, list);
1525 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1527 struct snd_soc_dpcm *dpcm;
1528 unsigned long flags;
1530 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1531 for_each_dpcm_be(fe, stream, dpcm)
1532 dpcm->be->dpcm[stream].runtime_update =
1533 SND_SOC_DPCM_UPDATE_NO;
1534 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1537 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1540 struct snd_soc_dpcm *dpcm;
1542 /* disable any enabled and non active backends */
1543 for_each_dpcm_be(fe, stream, dpcm) {
1545 struct snd_soc_pcm_runtime *be = dpcm->be;
1546 struct snd_pcm_substream *be_substream =
1547 snd_soc_dpcm_get_substream(be, stream);
1549 if (be->dpcm[stream].users == 0)
1550 dev_err(be->dev, "ASoC: no users %s at close - state %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_OPEN)
1560 soc_pcm_close(be_substream);
1561 be_substream->runtime = NULL;
1562 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1566 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1568 struct snd_soc_dpcm *dpcm;
1571 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1572 for_each_dpcm_be(fe, stream, dpcm) {
1574 struct snd_soc_pcm_runtime *be = dpcm->be;
1575 struct snd_pcm_substream *be_substream =
1576 snd_soc_dpcm_get_substream(be, stream);
1578 if (!be_substream) {
1579 dev_err(be->dev, "ASoC: no backend %s stream\n",
1580 stream ? "capture" : "playback");
1584 /* is this op for this BE ? */
1585 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1588 /* first time the dpcm is open ? */
1589 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1590 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1591 stream ? "capture" : "playback",
1592 be->dpcm[stream].state);
1594 if (be->dpcm[stream].users++ != 0)
1597 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1598 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1601 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1602 stream ? "capture" : "playback", be->dai_link->name);
1604 be_substream->runtime = be->dpcm[stream].runtime;
1605 err = soc_pcm_open(be_substream);
1607 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1608 be->dpcm[stream].users--;
1609 if (be->dpcm[stream].users < 0)
1610 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1611 stream ? "capture" : "playback",
1612 be->dpcm[stream].state);
1614 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1618 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1625 /* disable any enabled and non active backends */
1626 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1627 struct snd_soc_pcm_runtime *be = dpcm->be;
1628 struct snd_pcm_substream *be_substream =
1629 snd_soc_dpcm_get_substream(be, stream);
1631 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1634 if (be->dpcm[stream].users == 0)
1635 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1636 stream ? "capture" : "playback",
1637 be->dpcm[stream].state);
1639 if (--be->dpcm[stream].users != 0)
1642 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1645 soc_pcm_close(be_substream);
1646 be_substream->runtime = NULL;
1647 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1653 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1654 struct snd_soc_pcm_stream *stream)
1656 runtime->hw.rate_min = stream->rate_min;
1657 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1658 runtime->hw.channels_min = stream->channels_min;
1659 runtime->hw.channels_max = stream->channels_max;
1660 if (runtime->hw.formats)
1661 runtime->hw.formats &= stream->formats;
1663 runtime->hw.formats = stream->formats;
1664 runtime->hw.rates = stream->rates;
1667 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1670 struct snd_soc_pcm_runtime *fe = substream->private_data;
1671 struct snd_soc_dpcm *dpcm;
1672 struct snd_soc_dai *dai;
1673 int stream = substream->stream;
1675 if (!fe->dai_link->dpcm_merged_format)
1679 * It returns merged BE codec format
1680 * if FE want to use it (= dpcm_merged_format)
1683 for_each_dpcm_be(fe, stream, dpcm) {
1684 struct snd_soc_pcm_runtime *be = dpcm->be;
1685 struct snd_soc_dai_driver *codec_dai_drv;
1686 struct snd_soc_pcm_stream *codec_stream;
1689 for_each_rtd_codec_dai(be, i, dai) {
1691 * Skip CODECs which don't support the current stream
1692 * type. See soc_pcm_init_runtime_hw() for more details
1694 if (!snd_soc_dai_stream_valid(dai, stream))
1697 codec_dai_drv = dai->driver;
1698 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1699 codec_stream = &codec_dai_drv->playback;
1701 codec_stream = &codec_dai_drv->capture;
1703 *formats &= codec_stream->formats;
1708 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1709 unsigned int *channels_min,
1710 unsigned int *channels_max)
1712 struct snd_soc_pcm_runtime *fe = substream->private_data;
1713 struct snd_soc_dpcm *dpcm;
1714 int stream = substream->stream;
1716 if (!fe->dai_link->dpcm_merged_chan)
1720 * It returns merged BE codec channel;
1721 * if FE want to use it (= dpcm_merged_chan)
1724 for_each_dpcm_be(fe, stream, dpcm) {
1725 struct snd_soc_pcm_runtime *be = dpcm->be;
1726 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1727 struct snd_soc_dai_driver *codec_dai_drv;
1728 struct snd_soc_pcm_stream *codec_stream;
1729 struct snd_soc_pcm_stream *cpu_stream;
1731 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1732 cpu_stream = &cpu_dai_drv->playback;
1734 cpu_stream = &cpu_dai_drv->capture;
1736 *channels_min = max(*channels_min, cpu_stream->channels_min);
1737 *channels_max = min(*channels_max, cpu_stream->channels_max);
1740 * chan min/max cannot be enforced if there are multiple CODEC
1741 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1743 if (be->num_codecs == 1) {
1744 codec_dai_drv = be->codec_dais[0]->driver;
1746 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1747 codec_stream = &codec_dai_drv->playback;
1749 codec_stream = &codec_dai_drv->capture;
1751 *channels_min = max(*channels_min,
1752 codec_stream->channels_min);
1753 *channels_max = min(*channels_max,
1754 codec_stream->channels_max);
1759 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1760 unsigned int *rates,
1761 unsigned int *rate_min,
1762 unsigned int *rate_max)
1764 struct snd_soc_pcm_runtime *fe = substream->private_data;
1765 struct snd_soc_dpcm *dpcm;
1766 int stream = substream->stream;
1768 if (!fe->dai_link->dpcm_merged_rate)
1772 * It returns merged BE codec channel;
1773 * if FE want to use it (= dpcm_merged_chan)
1776 for_each_dpcm_be(fe, stream, dpcm) {
1777 struct snd_soc_pcm_runtime *be = dpcm->be;
1778 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1779 struct snd_soc_dai_driver *codec_dai_drv;
1780 struct snd_soc_pcm_stream *codec_stream;
1781 struct snd_soc_pcm_stream *cpu_stream;
1782 struct snd_soc_dai *dai;
1785 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1786 cpu_stream = &cpu_dai_drv->playback;
1788 cpu_stream = &cpu_dai_drv->capture;
1790 *rate_min = max(*rate_min, cpu_stream->rate_min);
1791 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1792 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1794 for_each_rtd_codec_dai(be, i, dai) {
1796 * Skip CODECs which don't support the current stream
1797 * type. See soc_pcm_init_runtime_hw() for more details
1799 if (!snd_soc_dai_stream_valid(dai, stream))
1802 codec_dai_drv = dai->driver;
1803 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1804 codec_stream = &codec_dai_drv->playback;
1806 codec_stream = &codec_dai_drv->capture;
1808 *rate_min = max(*rate_min, codec_stream->rate_min);
1809 *rate_max = min_not_zero(*rate_max,
1810 codec_stream->rate_max);
1811 *rates = snd_pcm_rate_mask_intersect(*rates,
1812 codec_stream->rates);
1817 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1819 struct snd_pcm_runtime *runtime = substream->runtime;
1820 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1821 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1822 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1824 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1825 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1827 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1829 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1830 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1831 &runtime->hw.channels_max);
1832 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1833 &runtime->hw.rate_min, &runtime->hw.rate_max);
1836 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1838 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1839 * for avoiding the race with trigger callback.
1840 * If the state is unset and a trigger is pending while the previous operation,
1841 * process the pending trigger action here.
1843 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1844 int stream, enum snd_soc_dpcm_update state)
1846 struct snd_pcm_substream *substream =
1847 snd_soc_dpcm_get_substream(fe, stream);
1849 snd_pcm_stream_lock_irq(substream);
1850 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1851 dpcm_fe_dai_do_trigger(substream,
1852 fe->dpcm[stream].trigger_pending - 1);
1853 fe->dpcm[stream].trigger_pending = 0;
1855 fe->dpcm[stream].runtime_update = state;
1856 snd_pcm_stream_unlock_irq(substream);
1859 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1862 struct snd_soc_dpcm *dpcm;
1863 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1864 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1867 /* apply symmetry for FE */
1868 if (soc_pcm_has_symmetry(fe_substream))
1869 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1871 /* Symmetry only applies if we've got an active stream. */
1872 if (fe_cpu_dai->active) {
1873 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1878 /* apply symmetry for BE */
1879 for_each_dpcm_be(fe, stream, dpcm) {
1880 struct snd_soc_pcm_runtime *be = dpcm->be;
1881 struct snd_pcm_substream *be_substream =
1882 snd_soc_dpcm_get_substream(be, stream);
1883 struct snd_soc_pcm_runtime *rtd;
1884 struct snd_soc_dai *codec_dai;
1887 /* A backend may not have the requested substream */
1891 rtd = be_substream->private_data;
1892 if (rtd->dai_link->be_hw_params_fixup)
1895 if (soc_pcm_has_symmetry(be_substream))
1896 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1898 /* Symmetry only applies if we've got an active stream. */
1899 if (rtd->cpu_dai->active) {
1900 err = soc_pcm_apply_symmetry(fe_substream,
1906 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1907 if (codec_dai->active) {
1908 err = soc_pcm_apply_symmetry(fe_substream,
1919 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1921 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1922 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1923 int stream = fe_substream->stream, ret = 0;
1925 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1927 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1929 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1933 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1935 /* start the DAI frontend */
1936 ret = soc_pcm_open(fe_substream);
1938 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1942 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1944 dpcm_set_fe_runtime(fe_substream);
1945 snd_pcm_limit_hw_rates(runtime);
1947 ret = dpcm_apply_symmetry(fe_substream, stream);
1949 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1954 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1958 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1960 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1964 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1966 struct snd_soc_dpcm *dpcm;
1968 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1969 for_each_dpcm_be(fe, stream, dpcm) {
1971 struct snd_soc_pcm_runtime *be = dpcm->be;
1972 struct snd_pcm_substream *be_substream =
1973 snd_soc_dpcm_get_substream(be, stream);
1975 /* is this op for this BE ? */
1976 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1979 if (be->dpcm[stream].users == 0)
1980 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1981 stream ? "capture" : "playback",
1982 be->dpcm[stream].state);
1984 if (--be->dpcm[stream].users != 0)
1987 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1988 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1989 soc_pcm_hw_free(be_substream);
1990 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1993 dev_dbg(be->dev, "ASoC: close BE %s\n",
1994 be->dai_link->name);
1996 soc_pcm_close(be_substream);
1997 be_substream->runtime = NULL;
1999 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2004 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2006 struct snd_soc_pcm_runtime *fe = substream->private_data;
2007 int stream = substream->stream;
2009 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2011 /* shutdown the BEs */
2012 dpcm_be_dai_shutdown(fe, substream->stream);
2014 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2016 /* now shutdown the frontend */
2017 soc_pcm_close(substream);
2019 /* run the stream event for each BE */
2020 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2022 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2023 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2027 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2029 struct snd_soc_dpcm *dpcm;
2031 /* only hw_params backends that are either sinks or sources
2032 * to this frontend DAI */
2033 for_each_dpcm_be(fe, stream, dpcm) {
2035 struct snd_soc_pcm_runtime *be = dpcm->be;
2036 struct snd_pcm_substream *be_substream =
2037 snd_soc_dpcm_get_substream(be, stream);
2039 /* is this op for this BE ? */
2040 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2043 /* only free hw when no longer used - check all FEs */
2044 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2047 /* do not free hw if this BE is used by other FE */
2048 if (be->dpcm[stream].users > 1)
2051 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2052 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2053 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2054 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2055 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2056 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2059 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2060 be->dai_link->name);
2062 soc_pcm_hw_free(be_substream);
2064 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2070 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2072 struct snd_soc_pcm_runtime *fe = substream->private_data;
2073 int err, stream = substream->stream;
2075 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2076 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2078 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2080 /* call hw_free on the frontend */
2081 err = soc_pcm_hw_free(substream);
2083 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2084 fe->dai_link->name);
2086 /* only hw_params backends that are either sinks or sources
2087 * to this frontend DAI */
2088 err = dpcm_be_dai_hw_free(fe, stream);
2090 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2091 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2093 mutex_unlock(&fe->card->mutex);
2097 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2099 struct snd_soc_dpcm *dpcm;
2102 for_each_dpcm_be(fe, stream, dpcm) {
2104 struct snd_soc_pcm_runtime *be = dpcm->be;
2105 struct snd_pcm_substream *be_substream =
2106 snd_soc_dpcm_get_substream(be, stream);
2108 /* is this op for this BE ? */
2109 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2112 /* copy params for each dpcm */
2113 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2114 sizeof(struct snd_pcm_hw_params));
2116 /* perform any hw_params fixups */
2117 if (be->dai_link->be_hw_params_fixup) {
2118 ret = be->dai_link->be_hw_params_fixup(be,
2122 "ASoC: hw_params BE fixup failed %d\n",
2128 /* copy the fixed-up hw params for BE dai */
2129 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2130 sizeof(struct snd_pcm_hw_params));
2132 /* only allow hw_params() if no connected FEs are running */
2133 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2136 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2137 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2138 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2141 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2142 be->dai_link->name);
2144 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2146 dev_err(dpcm->be->dev,
2147 "ASoC: hw_params BE failed %d\n", ret);
2151 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2156 /* disable any enabled and non active backends */
2157 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2158 struct snd_soc_pcm_runtime *be = dpcm->be;
2159 struct snd_pcm_substream *be_substream =
2160 snd_soc_dpcm_get_substream(be, stream);
2162 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2165 /* only allow hw_free() if no connected FEs are running */
2166 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2169 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2170 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2171 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2172 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2175 soc_pcm_hw_free(be_substream);
2181 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2182 struct snd_pcm_hw_params *params)
2184 struct snd_soc_pcm_runtime *fe = substream->private_data;
2185 int ret, stream = substream->stream;
2187 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2188 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2190 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2191 sizeof(struct snd_pcm_hw_params));
2192 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2194 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2198 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2199 fe->dai_link->name, params_rate(params),
2200 params_channels(params), params_format(params));
2202 /* call hw_params on the frontend */
2203 ret = soc_pcm_hw_params(substream, params);
2205 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2206 dpcm_be_dai_hw_free(fe, stream);
2208 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2211 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2212 mutex_unlock(&fe->card->mutex);
2216 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2217 struct snd_pcm_substream *substream, int cmd)
2221 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2222 dpcm->be->dai_link->name, cmd);
2224 ret = soc_pcm_trigger(substream, cmd);
2226 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2231 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2234 struct snd_soc_dpcm *dpcm;
2237 for_each_dpcm_be(fe, stream, dpcm) {
2239 struct snd_soc_pcm_runtime *be = dpcm->be;
2240 struct snd_pcm_substream *be_substream =
2241 snd_soc_dpcm_get_substream(be, stream);
2243 /* is this op for this BE ? */
2244 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2248 case SNDRV_PCM_TRIGGER_START:
2249 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2250 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2253 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2257 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2259 case SNDRV_PCM_TRIGGER_RESUME:
2260 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2263 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2267 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2269 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2270 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2273 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2277 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2279 case SNDRV_PCM_TRIGGER_STOP:
2280 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2283 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2286 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2290 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2292 case SNDRV_PCM_TRIGGER_SUSPEND:
2293 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2296 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2299 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2303 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2305 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2306 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2309 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2312 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2316 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2323 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2325 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2327 struct snd_soc_pcm_runtime *fe = substream->private_data;
2328 int stream = substream->stream, ret;
2329 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2331 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2334 case SND_SOC_DPCM_TRIGGER_PRE:
2335 /* call trigger on the frontend before the backend. */
2337 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2338 fe->dai_link->name, cmd);
2340 ret = soc_pcm_trigger(substream, cmd);
2342 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2346 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2348 case SND_SOC_DPCM_TRIGGER_POST:
2349 /* call trigger on the frontend after the backend. */
2351 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2353 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2357 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2358 fe->dai_link->name, cmd);
2360 ret = soc_pcm_trigger(substream, cmd);
2362 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2363 /* bespoke trigger() - handles both FE and BEs */
2365 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2366 fe->dai_link->name, cmd);
2368 ret = soc_pcm_bespoke_trigger(substream, cmd);
2370 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2375 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2376 fe->dai_link->name);
2382 case SNDRV_PCM_TRIGGER_START:
2383 case SNDRV_PCM_TRIGGER_RESUME:
2384 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2385 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2387 case SNDRV_PCM_TRIGGER_STOP:
2388 case SNDRV_PCM_TRIGGER_SUSPEND:
2389 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2391 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2392 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2397 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2401 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2403 struct snd_soc_pcm_runtime *fe = substream->private_data;
2404 int stream = substream->stream;
2406 /* if FE's runtime_update is already set, we're in race;
2407 * process this trigger later at exit
2409 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2410 fe->dpcm[stream].trigger_pending = cmd + 1;
2411 return 0; /* delayed, assuming it's successful */
2414 /* we're alone, let's trigger */
2415 return dpcm_fe_dai_do_trigger(substream, cmd);
2418 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2420 struct snd_soc_dpcm *dpcm;
2423 for_each_dpcm_be(fe, stream, dpcm) {
2425 struct snd_soc_pcm_runtime *be = dpcm->be;
2426 struct snd_pcm_substream *be_substream =
2427 snd_soc_dpcm_get_substream(be, stream);
2429 /* is this op for this BE ? */
2430 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2433 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2434 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2435 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2436 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2439 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2440 be->dai_link->name);
2442 ret = soc_pcm_prepare(be_substream);
2444 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2449 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2454 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2456 struct snd_soc_pcm_runtime *fe = substream->private_data;
2457 int stream = substream->stream, ret = 0;
2459 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2461 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2463 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2465 /* there is no point preparing this FE if there are no BEs */
2466 if (list_empty(&fe->dpcm[stream].be_clients)) {
2467 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2468 fe->dai_link->name);
2473 ret = dpcm_be_dai_prepare(fe, substream->stream);
2477 /* call prepare on the frontend */
2478 ret = soc_pcm_prepare(substream);
2480 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2481 fe->dai_link->name);
2485 /* run the stream event for each BE */
2486 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2487 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2490 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2491 mutex_unlock(&fe->card->mutex);
2496 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2498 struct snd_pcm_substream *substream =
2499 snd_soc_dpcm_get_substream(fe, stream);
2500 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2503 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2504 stream ? "capture" : "playback", fe->dai_link->name);
2506 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2507 /* call bespoke trigger - FE takes care of all BE triggers */
2508 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2509 fe->dai_link->name);
2511 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2513 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2515 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2516 fe->dai_link->name);
2518 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2520 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2523 err = dpcm_be_dai_hw_free(fe, stream);
2525 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2527 err = dpcm_be_dai_shutdown(fe, stream);
2529 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2531 /* run the stream event for each BE */
2532 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2537 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2539 struct snd_pcm_substream *substream =
2540 snd_soc_dpcm_get_substream(fe, stream);
2541 struct snd_soc_dpcm *dpcm;
2542 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2544 unsigned long flags;
2546 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2547 stream ? "capture" : "playback", fe->dai_link->name);
2549 /* Only start the BE if the FE is ready */
2550 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2551 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2554 /* startup must always be called for new BEs */
2555 ret = dpcm_be_dai_startup(fe, stream);
2559 /* keep going if FE state is > open */
2560 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2563 ret = dpcm_be_dai_hw_params(fe, stream);
2567 /* keep going if FE state is > hw_params */
2568 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2572 ret = dpcm_be_dai_prepare(fe, stream);
2576 /* run the stream event for each BE */
2577 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2579 /* keep going if FE state is > prepare */
2580 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2581 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2584 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2585 /* call trigger on the frontend - FE takes care of all BE triggers */
2586 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2587 fe->dai_link->name);
2589 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2591 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2595 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2596 fe->dai_link->name);
2598 ret = dpcm_be_dai_trigger(fe, stream,
2599 SNDRV_PCM_TRIGGER_START);
2601 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2609 dpcm_be_dai_hw_free(fe, stream);
2611 dpcm_be_dai_shutdown(fe, stream);
2613 /* disconnect any non started BEs */
2614 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2615 for_each_dpcm_be(fe, stream, dpcm) {
2616 struct snd_soc_pcm_runtime *be = dpcm->be;
2617 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2618 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2620 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2625 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2629 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2630 ret = dpcm_run_update_startup(fe, stream);
2632 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2633 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2638 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2642 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2643 ret = dpcm_run_update_shutdown(fe, stream);
2645 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2646 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2651 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2653 struct snd_soc_dapm_widget_list *list;
2656 if (!fe->dai_link->dynamic)
2659 /* only check active links */
2660 if (!fe->cpu_dai->active)
2663 /* DAPM sync will call this to update DSP paths */
2664 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2665 new ? "new" : "old", fe->dai_link->name);
2667 /* skip if FE doesn't have playback capability */
2668 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2669 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2672 /* skip if FE isn't currently playing */
2673 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2676 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2678 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2679 fe->dai_link->name, "playback");
2683 /* update any playback paths */
2684 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2687 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2689 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2691 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2692 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2695 dpcm_path_put(&list);
2698 /* skip if FE doesn't have capture capability */
2699 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2700 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2703 /* skip if FE isn't currently capturing */
2704 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2707 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2709 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2710 fe->dai_link->name, "capture");
2714 /* update any old capture paths */
2715 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2718 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2720 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2722 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2723 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2726 dpcm_path_put(&list);
2731 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2734 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2736 struct snd_soc_pcm_runtime *fe;
2739 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2740 /* shutdown all old paths first */
2741 for_each_card_rtds(card, fe) {
2742 ret = soc_dpcm_fe_runtime_update(fe, 0);
2747 /* bring new paths up */
2748 for_each_card_rtds(card, fe) {
2749 ret = soc_dpcm_fe_runtime_update(fe, 1);
2755 mutex_unlock(&card->mutex);
2758 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2760 struct snd_soc_dpcm *dpcm;
2761 struct snd_soc_dai *dai;
2763 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2765 struct snd_soc_pcm_runtime *be = dpcm->be;
2768 if (be->dai_link->ignore_suspend)
2771 for_each_rtd_codec_dai(be, i, dai) {
2772 struct snd_soc_dai_driver *drv = dai->driver;
2774 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2775 be->dai_link->name);
2777 if (drv->ops && drv->ops->digital_mute &&
2778 dai->playback_active)
2779 drv->ops->digital_mute(dai, mute);
2786 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2788 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2789 struct snd_soc_dpcm *dpcm;
2790 struct snd_soc_dapm_widget_list *list;
2792 int stream = fe_substream->stream;
2794 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2795 fe->dpcm[stream].runtime = fe_substream->runtime;
2797 ret = dpcm_path_get(fe, stream, &list);
2799 mutex_unlock(&fe->card->mutex);
2801 } else if (ret == 0) {
2802 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2803 fe->dai_link->name, stream ? "capture" : "playback");
2806 /* calculate valid and active FE <-> BE dpcms */
2807 dpcm_process_paths(fe, stream, &list, 1);
2809 ret = dpcm_fe_dai_startup(fe_substream);
2811 /* clean up all links */
2812 for_each_dpcm_be(fe, stream, dpcm)
2813 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2815 dpcm_be_disconnect(fe, stream);
2816 fe->dpcm[stream].runtime = NULL;
2819 dpcm_clear_pending_state(fe, stream);
2820 dpcm_path_put(&list);
2821 mutex_unlock(&fe->card->mutex);
2825 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2827 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2828 struct snd_soc_dpcm *dpcm;
2829 int stream = fe_substream->stream, ret;
2831 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2832 ret = dpcm_fe_dai_shutdown(fe_substream);
2834 /* mark FE's links ready to prune */
2835 for_each_dpcm_be(fe, stream, dpcm)
2836 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2838 dpcm_be_disconnect(fe, stream);
2840 fe->dpcm[stream].runtime = NULL;
2841 mutex_unlock(&fe->card->mutex);
2845 static void soc_pcm_private_free(struct snd_pcm *pcm)
2847 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2849 /* need to sync the delayed work before releasing resources */
2850 flush_delayed_work(&rtd->delayed_work);
2851 snd_soc_pcm_component_free(pcm);
2854 /* create a new pcm */
2855 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2857 struct snd_soc_dai *codec_dai;
2858 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2859 struct snd_soc_rtdcom_list *rtdcom;
2860 struct snd_soc_component *component;
2861 struct snd_pcm *pcm;
2863 int ret = 0, playback = 0, capture = 0;
2866 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2867 playback = rtd->dai_link->dpcm_playback;
2868 capture = rtd->dai_link->dpcm_capture;
2870 /* Adapt stream for codec2codec links */
2871 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2872 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2873 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2874 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2876 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2877 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2878 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2880 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2881 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2885 capture = capture && cpu_capture->channels_min;
2886 playback = playback && cpu_playback->channels_min;
2889 if (rtd->dai_link->playback_only) {
2894 if (rtd->dai_link->capture_only) {
2899 /* create the PCM */
2900 if (rtd->dai_link->params) {
2901 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2902 rtd->dai_link->stream_name);
2904 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2905 playback, capture, &pcm);
2906 } else if (rtd->dai_link->no_pcm) {
2907 snprintf(new_name, sizeof(new_name), "(%s)",
2908 rtd->dai_link->stream_name);
2910 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2911 playback, capture, &pcm);
2913 if (rtd->dai_link->dynamic)
2914 snprintf(new_name, sizeof(new_name), "%s (*)",
2915 rtd->dai_link->stream_name);
2917 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2918 rtd->dai_link->stream_name,
2919 (rtd->num_codecs > 1) ?
2920 "multicodec" : rtd->codec_dai->name, num);
2922 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2926 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2927 rtd->dai_link->name);
2930 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2932 /* DAPM dai link stream work */
2933 if (rtd->dai_link->params)
2934 INIT_DELAYED_WORK(&rtd->delayed_work,
2935 codec2codec_close_delayed_work);
2937 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2939 pcm->nonatomic = rtd->dai_link->nonatomic;
2941 pcm->private_data = rtd;
2943 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2945 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2947 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2951 /* ASoC PCM operations */
2952 if (rtd->dai_link->dynamic) {
2953 rtd->ops.open = dpcm_fe_dai_open;
2954 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2955 rtd->ops.prepare = dpcm_fe_dai_prepare;
2956 rtd->ops.trigger = dpcm_fe_dai_trigger;
2957 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2958 rtd->ops.close = dpcm_fe_dai_close;
2959 rtd->ops.pointer = soc_pcm_pointer;
2960 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2962 rtd->ops.open = soc_pcm_open;
2963 rtd->ops.hw_params = soc_pcm_hw_params;
2964 rtd->ops.prepare = soc_pcm_prepare;
2965 rtd->ops.trigger = soc_pcm_trigger;
2966 rtd->ops.hw_free = soc_pcm_hw_free;
2967 rtd->ops.close = soc_pcm_close;
2968 rtd->ops.pointer = soc_pcm_pointer;
2969 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2972 for_each_rtd_components(rtd, rtdcom, component) {
2973 const struct snd_soc_component_driver *drv = component->driver;
2976 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2978 rtd->ops.page = snd_soc_pcm_component_page;
2980 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2984 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2987 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2989 ret = snd_soc_pcm_component_new(pcm);
2991 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2995 pcm->private_free = soc_pcm_private_free;
2996 pcm->no_device_suspend = true;
2998 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2999 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3004 /* is the current PCM operation for this FE ? */
3005 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3007 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3011 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3013 /* is the current PCM operation for this BE ? */
3014 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3015 struct snd_soc_pcm_runtime *be, int stream)
3017 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3018 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3019 be->dpcm[stream].runtime_update))
3023 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3025 /* get the substream for this BE */
3026 struct snd_pcm_substream *
3027 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3029 return be->pcm->streams[stream].substream;
3031 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3033 /* get the BE runtime state */
3034 enum snd_soc_dpcm_state
3035 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3037 return be->dpcm[stream].state;
3039 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3041 /* set the BE runtime state */
3042 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3043 int stream, enum snd_soc_dpcm_state state)
3045 be->dpcm[stream].state = state;
3047 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3050 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3051 * are not running, paused or suspended for the specified stream direction.
3053 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3054 struct snd_soc_pcm_runtime *be, int stream)
3056 struct snd_soc_dpcm *dpcm;
3059 unsigned long flags;
3061 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3062 for_each_dpcm_fe(be, stream, dpcm) {
3067 state = dpcm->fe->dpcm[stream].state;
3068 if (state == SND_SOC_DPCM_STATE_START ||
3069 state == SND_SOC_DPCM_STATE_PAUSED ||
3070 state == SND_SOC_DPCM_STATE_SUSPEND) {
3075 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3077 /* it's safe to free/stop this BE DAI */
3080 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3083 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3084 * running, paused or suspended for the specified stream direction.
3086 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3087 struct snd_soc_pcm_runtime *be, int stream)
3089 struct snd_soc_dpcm *dpcm;
3092 unsigned long flags;
3094 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3095 for_each_dpcm_fe(be, stream, dpcm) {
3100 state = dpcm->fe->dpcm[stream].state;
3101 if (state == SND_SOC_DPCM_STATE_START ||
3102 state == SND_SOC_DPCM_STATE_PAUSED ||
3103 state == SND_SOC_DPCM_STATE_SUSPEND ||
3104 state == SND_SOC_DPCM_STATE_PREPARE) {
3109 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3111 /* it's safe to change hw_params */
3114 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3116 #ifdef CONFIG_DEBUG_FS
3117 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3120 case SND_SOC_DPCM_STATE_NEW:
3122 case SND_SOC_DPCM_STATE_OPEN:
3124 case SND_SOC_DPCM_STATE_HW_PARAMS:
3126 case SND_SOC_DPCM_STATE_PREPARE:
3128 case SND_SOC_DPCM_STATE_START:
3130 case SND_SOC_DPCM_STATE_STOP:
3132 case SND_SOC_DPCM_STATE_SUSPEND:
3134 case SND_SOC_DPCM_STATE_PAUSED:
3136 case SND_SOC_DPCM_STATE_HW_FREE:
3138 case SND_SOC_DPCM_STATE_CLOSE:
3145 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3146 int stream, char *buf, size_t size)
3148 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3149 struct snd_soc_dpcm *dpcm;
3151 unsigned long flags;
3154 offset += snprintf(buf + offset, size - offset,
3155 "[%s - %s]\n", fe->dai_link->name,
3156 stream ? "Capture" : "Playback");
3158 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3159 dpcm_state_string(fe->dpcm[stream].state));
3161 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3162 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3163 offset += snprintf(buf + offset, size - offset,
3165 "Format = %s, Channels = %d, Rate = %d\n",
3166 snd_pcm_format_name(params_format(params)),
3167 params_channels(params),
3168 params_rate(params));
3171 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3173 if (list_empty(&fe->dpcm[stream].be_clients)) {
3174 offset += snprintf(buf + offset, size - offset,
3175 " No active DSP links\n");
3179 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3180 for_each_dpcm_be(fe, stream, dpcm) {
3181 struct snd_soc_pcm_runtime *be = dpcm->be;
3182 params = &dpcm->hw_params;
3184 offset += snprintf(buf + offset, size - offset,
3185 "- %s\n", be->dai_link->name);
3187 offset += snprintf(buf + offset, size - offset,
3189 dpcm_state_string(be->dpcm[stream].state));
3191 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3192 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3193 offset += snprintf(buf + offset, size - offset,
3194 " Hardware Params: "
3195 "Format = %s, Channels = %d, Rate = %d\n",
3196 snd_pcm_format_name(params_format(params)),
3197 params_channels(params),
3198 params_rate(params));
3200 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3205 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3206 size_t count, loff_t *ppos)
3208 struct snd_soc_pcm_runtime *fe = file->private_data;
3209 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3212 buf = kmalloc(out_count, GFP_KERNEL);
3216 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3217 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3218 buf + offset, out_count - offset);
3220 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3221 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3222 buf + offset, out_count - offset);
3224 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3230 static const struct file_operations dpcm_state_fops = {
3231 .open = simple_open,
3232 .read = dpcm_state_read_file,
3233 .llseek = default_llseek,
3236 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3241 if (!rtd->dai_link->dynamic)
3244 if (!rtd->card->debugfs_card_root)
3247 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3248 rtd->card->debugfs_card_root);
3250 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3251 rtd, &dpcm_state_fops);