2 * soc-pcm.c -- ALSA SoC PCM
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include <linux/export.h>
27 #include <linux/debugfs.h>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/soc-dpcm.h>
33 #include <sound/initval.h>
35 #define DPCM_MAX_BE_USERS 8
38 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
39 * @rtd: ASoC PCM runtime that is activated
40 * @stream: Direction of the PCM stream
42 * Increments the active count for all the DAIs and components attached to a PCM
43 * runtime. Should typically be called when a stream is opened.
45 * Must be called with the rtd->pcm_mutex being held
47 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime
*rtd
, int stream
)
49 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
50 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
52 lockdep_assert_held(&rtd
->pcm_mutex
);
54 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
55 cpu_dai
->playback_active
++;
56 codec_dai
->playback_active
++;
58 cpu_dai
->capture_active
++;
59 codec_dai
->capture_active
++;
64 cpu_dai
->component
->active
++;
65 codec_dai
->component
->active
++;
69 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
70 * @rtd: ASoC PCM runtime that is deactivated
71 * @stream: Direction of the PCM stream
73 * Decrements the active count for all the DAIs and components attached to a PCM
74 * runtime. Should typically be called when a stream is closed.
76 * Must be called with the rtd->pcm_mutex being held
78 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime
*rtd
, int stream
)
80 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
81 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
83 lockdep_assert_held(&rtd
->pcm_mutex
);
85 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
86 cpu_dai
->playback_active
--;
87 codec_dai
->playback_active
--;
89 cpu_dai
->capture_active
--;
90 codec_dai
->capture_active
--;
95 cpu_dai
->component
->active
--;
96 codec_dai
->component
->active
--;
100 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
101 * @rtd: The ASoC PCM runtime that should be checked.
103 * This function checks whether the power down delay should be ignored for a
104 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
105 * been configured to ignore the delay, or if none of the components benefits
106 * from having the delay.
108 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime
*rtd
)
110 if (!rtd
->pmdown_time
|| rtd
->dai_link
->ignore_pmdown_time
)
113 return rtd
->cpu_dai
->component
->ignore_pmdown_time
&&
114 rtd
->codec_dai
->component
->ignore_pmdown_time
;
118 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
119 * @substream: the pcm substream
120 * @hw: the hardware parameters
122 * Sets the substream runtime hardware parameters.
124 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
125 const struct snd_pcm_hardware
*hw
)
127 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
128 runtime
->hw
.info
= hw
->info
;
129 runtime
->hw
.formats
= hw
->formats
;
130 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
131 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
132 runtime
->hw
.periods_min
= hw
->periods_min
;
133 runtime
->hw
.periods_max
= hw
->periods_max
;
134 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
135 runtime
->hw
.fifo_size
= hw
->fifo_size
;
138 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
140 /* DPCM stream event, send event to FE and all active BEs. */
141 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime
*fe
, int dir
,
144 struct snd_soc_dpcm
*dpcm
;
146 list_for_each_entry(dpcm
, &fe
->dpcm
[dir
].be_clients
, list_be
) {
148 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
150 dev_dbg(be
->dev
, "ASoC: BE %s event %d dir %d\n",
151 be
->dai_link
->name
, event
, dir
);
153 snd_soc_dapm_stream_event(be
, dir
, event
);
156 snd_soc_dapm_stream_event(fe
, dir
, event
);
161 static int soc_pcm_apply_symmetry(struct snd_pcm_substream
*substream
,
162 struct snd_soc_dai
*soc_dai
)
164 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
167 if (soc_dai
->rate
&& (soc_dai
->driver
->symmetric_rates
||
168 rtd
->dai_link
->symmetric_rates
)) {
169 dev_dbg(soc_dai
->dev
, "ASoC: Symmetry forces %dHz rate\n",
172 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
173 SNDRV_PCM_HW_PARAM_RATE
,
174 soc_dai
->rate
, soc_dai
->rate
);
176 dev_err(soc_dai
->dev
,
177 "ASoC: Unable to apply rate constraint: %d\n",
183 if (soc_dai
->channels
&& (soc_dai
->driver
->symmetric_channels
||
184 rtd
->dai_link
->symmetric_channels
)) {
185 dev_dbg(soc_dai
->dev
, "ASoC: Symmetry forces %d channel(s)\n",
188 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
189 SNDRV_PCM_HW_PARAM_CHANNELS
,
193 dev_err(soc_dai
->dev
,
194 "ASoC: Unable to apply channel symmetry constraint: %d\n",
200 if (soc_dai
->sample_bits
&& (soc_dai
->driver
->symmetric_samplebits
||
201 rtd
->dai_link
->symmetric_samplebits
)) {
202 dev_dbg(soc_dai
->dev
, "ASoC: Symmetry forces %d sample bits\n",
203 soc_dai
->sample_bits
);
205 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
206 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
207 soc_dai
->sample_bits
,
208 soc_dai
->sample_bits
);
210 dev_err(soc_dai
->dev
,
211 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
220 static int soc_pcm_params_symmetry(struct snd_pcm_substream
*substream
,
221 struct snd_pcm_hw_params
*params
)
223 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
224 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
225 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
226 unsigned int rate
, channels
, sample_bits
, symmetry
;
228 rate
= params_rate(params
);
229 channels
= params_channels(params
);
230 sample_bits
= snd_pcm_format_physical_width(params_format(params
));
232 /* reject unmatched parameters when applying symmetry */
233 symmetry
= cpu_dai
->driver
->symmetric_rates
||
234 codec_dai
->driver
->symmetric_rates
||
235 rtd
->dai_link
->symmetric_rates
;
236 if (symmetry
&& cpu_dai
->rate
&& cpu_dai
->rate
!= rate
) {
237 dev_err(rtd
->dev
, "ASoC: unmatched rate symmetry: %d - %d\n",
238 cpu_dai
->rate
, rate
);
242 symmetry
= cpu_dai
->driver
->symmetric_channels
||
243 codec_dai
->driver
->symmetric_channels
||
244 rtd
->dai_link
->symmetric_channels
;
245 if (symmetry
&& cpu_dai
->channels
&& cpu_dai
->channels
!= channels
) {
246 dev_err(rtd
->dev
, "ASoC: unmatched channel symmetry: %d - %d\n",
247 cpu_dai
->channels
, channels
);
251 symmetry
= cpu_dai
->driver
->symmetric_samplebits
||
252 codec_dai
->driver
->symmetric_samplebits
||
253 rtd
->dai_link
->symmetric_samplebits
;
254 if (symmetry
&& cpu_dai
->sample_bits
&& cpu_dai
->sample_bits
!= sample_bits
) {
255 dev_err(rtd
->dev
, "ASoC: unmatched sample bits symmetry: %d - %d\n",
256 cpu_dai
->sample_bits
, sample_bits
);
263 static bool soc_pcm_has_symmetry(struct snd_pcm_substream
*substream
)
265 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
266 struct snd_soc_dai_driver
*cpu_driver
= rtd
->cpu_dai
->driver
;
267 struct snd_soc_dai_driver
*codec_driver
= rtd
->codec_dai
->driver
;
268 struct snd_soc_dai_link
*link
= rtd
->dai_link
;
270 return cpu_driver
->symmetric_rates
|| codec_driver
->symmetric_rates
||
271 link
->symmetric_rates
|| cpu_driver
->symmetric_channels
||
272 codec_driver
->symmetric_channels
|| link
->symmetric_channels
||
273 cpu_driver
->symmetric_samplebits
||
274 codec_driver
->symmetric_samplebits
||
275 link
->symmetric_samplebits
;
279 * List of sample sizes that might go over the bus for parameter
280 * application. There ought to be a wildcard sample size for things
281 * like the DAC/ADC resolution to use but there isn't right now.
283 static int sample_sizes
[] = {
287 static void soc_pcm_apply_msb(struct snd_pcm_substream
*substream
,
288 struct snd_soc_dai
*dai
)
292 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
293 bits
= dai
->driver
->playback
.sig_bits
;
295 bits
= dai
->driver
->capture
.sig_bits
;
300 for (i
= 0; i
< ARRAY_SIZE(sample_sizes
); i
++) {
301 if (bits
>= sample_sizes
[i
])
304 ret
= snd_pcm_hw_constraint_msbits(substream
->runtime
, 0,
305 sample_sizes
[i
], bits
);
308 "ASoC: Failed to set MSB %d/%d: %d\n",
309 bits
, sample_sizes
[i
], ret
);
313 static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime
*runtime
,
314 struct snd_soc_pcm_stream
*codec_stream
,
315 struct snd_soc_pcm_stream
*cpu_stream
)
317 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
319 hw
->channels_min
= max(codec_stream
->channels_min
,
320 cpu_stream
->channels_min
);
321 hw
->channels_max
= min(codec_stream
->channels_max
,
322 cpu_stream
->channels_max
);
324 hw
->formats
&= codec_stream
->formats
& cpu_stream
->formats
;
326 hw
->formats
= codec_stream
->formats
& cpu_stream
->formats
;
327 hw
->rates
= snd_pcm_rate_mask_intersect(codec_stream
->rates
,
331 hw
->rate_max
= UINT_MAX
;
333 snd_pcm_limit_hw_rates(runtime
);
335 hw
->rate_min
= max(hw
->rate_min
, cpu_stream
->rate_min
);
336 hw
->rate_min
= max(hw
->rate_min
, codec_stream
->rate_min
);
337 hw
->rate_max
= min_not_zero(hw
->rate_max
, cpu_stream
->rate_max
);
338 hw
->rate_max
= min_not_zero(hw
->rate_max
, codec_stream
->rate_max
);
342 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
343 * then initialized and any private data can be allocated. This also calls
344 * startup for the cpu DAI, platform, machine and codec DAI.
346 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
348 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
349 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
350 struct snd_soc_platform
*platform
= rtd
->platform
;
351 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
352 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
353 struct snd_soc_dai_driver
*cpu_dai_drv
= cpu_dai
->driver
;
354 struct snd_soc_dai_driver
*codec_dai_drv
= codec_dai
->driver
;
357 pinctrl_pm_select_default_state(cpu_dai
->dev
);
358 pinctrl_pm_select_default_state(codec_dai
->dev
);
359 pm_runtime_get_sync(cpu_dai
->dev
);
360 pm_runtime_get_sync(codec_dai
->dev
);
361 pm_runtime_get_sync(platform
->dev
);
363 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
365 /* startup the audio subsystem */
366 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->startup
) {
367 ret
= cpu_dai
->driver
->ops
->startup(substream
, cpu_dai
);
369 dev_err(cpu_dai
->dev
, "ASoC: can't open interface"
370 " %s: %d\n", cpu_dai
->name
, ret
);
375 if (platform
->driver
->ops
&& platform
->driver
->ops
->open
) {
376 ret
= platform
->driver
->ops
->open(substream
);
378 dev_err(platform
->dev
, "ASoC: can't open platform"
379 " %s: %d\n", platform
->name
, ret
);
384 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->startup
) {
385 ret
= codec_dai
->driver
->ops
->startup(substream
, codec_dai
);
387 dev_err(codec_dai
->dev
, "ASoC: can't open codec"
388 " %s: %d\n", codec_dai
->name
, ret
);
393 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->startup
) {
394 ret
= rtd
->dai_link
->ops
->startup(substream
);
396 pr_err("ASoC: %s startup failed: %d\n",
397 rtd
->dai_link
->name
, ret
);
402 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
403 if (rtd
->dai_link
->dynamic
|| rtd
->dai_link
->no_pcm
)
406 /* Check that the codec and cpu DAIs are compatible */
407 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
408 soc_pcm_init_runtime_hw(runtime
, &codec_dai_drv
->playback
,
409 &cpu_dai_drv
->playback
);
411 soc_pcm_init_runtime_hw(runtime
, &codec_dai_drv
->capture
,
412 &cpu_dai_drv
->capture
);
415 if (soc_pcm_has_symmetry(substream
))
416 runtime
->hw
.info
|= SNDRV_PCM_INFO_JOINT_DUPLEX
;
419 if (!runtime
->hw
.rates
) {
420 printk(KERN_ERR
"ASoC: %s <-> %s No matching rates\n",
421 codec_dai
->name
, cpu_dai
->name
);
424 if (!runtime
->hw
.formats
) {
425 printk(KERN_ERR
"ASoC: %s <-> %s No matching formats\n",
426 codec_dai
->name
, cpu_dai
->name
);
429 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
||
430 runtime
->hw
.channels_min
> runtime
->hw
.channels_max
) {
431 printk(KERN_ERR
"ASoC: %s <-> %s No matching channels\n",
432 codec_dai
->name
, cpu_dai
->name
);
436 soc_pcm_apply_msb(substream
, codec_dai
);
437 soc_pcm_apply_msb(substream
, cpu_dai
);
439 /* Symmetry only applies if we've already got an active stream. */
440 if (cpu_dai
->active
) {
441 ret
= soc_pcm_apply_symmetry(substream
, cpu_dai
);
446 if (codec_dai
->active
) {
447 ret
= soc_pcm_apply_symmetry(substream
, codec_dai
);
452 pr_debug("ASoC: %s <-> %s info:\n",
453 codec_dai
->name
, cpu_dai
->name
);
454 pr_debug("ASoC: rate mask 0x%x\n", runtime
->hw
.rates
);
455 pr_debug("ASoC: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
456 runtime
->hw
.channels_max
);
457 pr_debug("ASoC: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
458 runtime
->hw
.rate_max
);
462 snd_soc_runtime_activate(rtd
, substream
->stream
);
464 mutex_unlock(&rtd
->pcm_mutex
);
468 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->shutdown
)
469 rtd
->dai_link
->ops
->shutdown(substream
);
472 if (codec_dai
->driver
->ops
->shutdown
)
473 codec_dai
->driver
->ops
->shutdown(substream
, codec_dai
);
476 if (platform
->driver
->ops
&& platform
->driver
->ops
->close
)
477 platform
->driver
->ops
->close(substream
);
480 if (cpu_dai
->driver
->ops
->shutdown
)
481 cpu_dai
->driver
->ops
->shutdown(substream
, cpu_dai
);
483 mutex_unlock(&rtd
->pcm_mutex
);
485 pm_runtime_put(platform
->dev
);
486 pm_runtime_put(codec_dai
->dev
);
487 pm_runtime_put(cpu_dai
->dev
);
488 if (!codec_dai
->active
)
489 pinctrl_pm_select_sleep_state(codec_dai
->dev
);
490 if (!cpu_dai
->active
)
491 pinctrl_pm_select_sleep_state(cpu_dai
->dev
);
497 * Power down the audio subsystem pmdown_time msecs after close is called.
498 * This is to ensure there are no pops or clicks in between any music tracks
499 * due to DAPM power cycling.
501 static void close_delayed_work(struct work_struct
*work
)
503 struct snd_soc_pcm_runtime
*rtd
=
504 container_of(work
, struct snd_soc_pcm_runtime
, delayed_work
.work
);
505 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
507 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
509 dev_dbg(rtd
->dev
, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
510 codec_dai
->driver
->playback
.stream_name
,
511 codec_dai
->playback_active
? "active" : "inactive",
512 rtd
->pop_wait
? "yes" : "no");
514 /* are we waiting on this codec DAI stream */
515 if (rtd
->pop_wait
== 1) {
517 snd_soc_dapm_stream_event(rtd
, SNDRV_PCM_STREAM_PLAYBACK
,
518 SND_SOC_DAPM_STREAM_STOP
);
521 mutex_unlock(&rtd
->pcm_mutex
);
525 * Called by ALSA when a PCM substream is closed. Private data can be
526 * freed here. The cpu DAI, codec DAI, machine and platform are also
529 static int soc_pcm_close(struct snd_pcm_substream
*substream
)
531 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
532 struct snd_soc_platform
*platform
= rtd
->platform
;
533 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
534 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
536 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
538 snd_soc_runtime_deactivate(rtd
, substream
->stream
);
540 /* clear the corresponding DAIs rate when inactive */
541 if (!cpu_dai
->active
)
544 if (!codec_dai
->active
)
547 if (cpu_dai
->driver
->ops
->shutdown
)
548 cpu_dai
->driver
->ops
->shutdown(substream
, cpu_dai
);
550 if (codec_dai
->driver
->ops
->shutdown
)
551 codec_dai
->driver
->ops
->shutdown(substream
, codec_dai
);
553 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->shutdown
)
554 rtd
->dai_link
->ops
->shutdown(substream
);
556 if (platform
->driver
->ops
&& platform
->driver
->ops
->close
)
557 platform
->driver
->ops
->close(substream
);
559 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
560 if (snd_soc_runtime_ignore_pmdown_time(rtd
)) {
561 /* powered down playback stream now */
562 snd_soc_dapm_stream_event(rtd
,
563 SNDRV_PCM_STREAM_PLAYBACK
,
564 SND_SOC_DAPM_STREAM_STOP
);
566 /* start delayed pop wq here for playback streams */
568 queue_delayed_work(system_power_efficient_wq
,
570 msecs_to_jiffies(rtd
->pmdown_time
));
573 /* capture streams can be powered down now */
574 snd_soc_dapm_stream_event(rtd
, SNDRV_PCM_STREAM_CAPTURE
,
575 SND_SOC_DAPM_STREAM_STOP
);
578 mutex_unlock(&rtd
->pcm_mutex
);
580 pm_runtime_put(platform
->dev
);
581 pm_runtime_put(codec_dai
->dev
);
582 pm_runtime_put(cpu_dai
->dev
);
583 if (!codec_dai
->active
)
584 pinctrl_pm_select_sleep_state(codec_dai
->dev
);
585 if (!cpu_dai
->active
)
586 pinctrl_pm_select_sleep_state(cpu_dai
->dev
);
592 * Called by ALSA when the PCM substream is prepared, can set format, sample
593 * rate, etc. This function is non atomic and can be called multiple times,
594 * it can refer to the runtime info.
596 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
598 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
599 struct snd_soc_platform
*platform
= rtd
->platform
;
600 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
601 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
604 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
606 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->prepare
) {
607 ret
= rtd
->dai_link
->ops
->prepare(substream
);
609 dev_err(rtd
->card
->dev
, "ASoC: machine prepare error:"
615 if (platform
->driver
->ops
&& platform
->driver
->ops
->prepare
) {
616 ret
= platform
->driver
->ops
->prepare(substream
);
618 dev_err(platform
->dev
, "ASoC: platform prepare error:"
624 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->prepare
) {
625 ret
= codec_dai
->driver
->ops
->prepare(substream
, codec_dai
);
627 dev_err(codec_dai
->dev
, "ASoC: DAI prepare error: %d\n",
633 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->prepare
) {
634 ret
= cpu_dai
->driver
->ops
->prepare(substream
, cpu_dai
);
636 dev_err(cpu_dai
->dev
, "ASoC: DAI prepare error: %d\n",
642 /* cancel any delayed stream shutdown that is pending */
643 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
646 cancel_delayed_work(&rtd
->delayed_work
);
649 snd_soc_dapm_stream_event(rtd
, substream
->stream
,
650 SND_SOC_DAPM_STREAM_START
);
652 snd_soc_dai_digital_mute(codec_dai
, 0, substream
->stream
);
655 mutex_unlock(&rtd
->pcm_mutex
);
660 * Called by ALSA when the hardware params are set by application. This
661 * function can also be called multiple times and can allocate buffers
662 * (using snd_pcm_lib_* ). It's non-atomic.
664 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
665 struct snd_pcm_hw_params
*params
)
667 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
668 struct snd_soc_platform
*platform
= rtd
->platform
;
669 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
670 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
673 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
675 ret
= soc_pcm_params_symmetry(substream
, params
);
679 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->hw_params
) {
680 ret
= rtd
->dai_link
->ops
->hw_params(substream
, params
);
682 dev_err(rtd
->card
->dev
, "ASoC: machine hw_params"
683 " failed: %d\n", ret
);
688 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->hw_params
) {
689 ret
= codec_dai
->driver
->ops
->hw_params(substream
, params
, codec_dai
);
691 dev_err(codec_dai
->dev
, "ASoC: can't set %s hw params:"
692 " %d\n", codec_dai
->name
, ret
);
697 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->hw_params
) {
698 ret
= cpu_dai
->driver
->ops
->hw_params(substream
, params
, cpu_dai
);
700 dev_err(cpu_dai
->dev
, "ASoC: %s hw params failed: %d\n",
706 if (platform
->driver
->ops
&& platform
->driver
->ops
->hw_params
) {
707 ret
= platform
->driver
->ops
->hw_params(substream
, params
);
709 dev_err(platform
->dev
, "ASoC: %s hw params failed: %d\n",
710 platform
->name
, ret
);
715 /* store the parameters for each DAIs */
716 cpu_dai
->rate
= params_rate(params
);
717 cpu_dai
->channels
= params_channels(params
);
718 cpu_dai
->sample_bits
=
719 snd_pcm_format_physical_width(params_format(params
));
721 codec_dai
->rate
= params_rate(params
);
722 codec_dai
->channels
= params_channels(params
);
723 codec_dai
->sample_bits
=
724 snd_pcm_format_physical_width(params_format(params
));
727 mutex_unlock(&rtd
->pcm_mutex
);
731 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->hw_free
)
732 cpu_dai
->driver
->ops
->hw_free(substream
, cpu_dai
);
735 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->hw_free
)
736 codec_dai
->driver
->ops
->hw_free(substream
, codec_dai
);
739 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->hw_free
)
740 rtd
->dai_link
->ops
->hw_free(substream
);
742 mutex_unlock(&rtd
->pcm_mutex
);
747 * Frees resources allocated by hw_params, can be called multiple times
749 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
751 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
752 struct snd_soc_platform
*platform
= rtd
->platform
;
753 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
754 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
755 bool playback
= substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
;
757 mutex_lock_nested(&rtd
->pcm_mutex
, rtd
->pcm_subclass
);
759 /* clear the corresponding DAIs parameters when going to be inactive */
760 if (cpu_dai
->active
== 1) {
762 cpu_dai
->channels
= 0;
763 cpu_dai
->sample_bits
= 0;
766 if (codec_dai
->active
== 1) {
768 codec_dai
->channels
= 0;
769 codec_dai
->sample_bits
= 0;
772 /* apply codec digital mute */
773 if ((playback
&& codec_dai
->playback_active
== 1) ||
774 (!playback
&& codec_dai
->capture_active
== 1))
775 snd_soc_dai_digital_mute(codec_dai
, 1, substream
->stream
);
777 /* free any machine hw params */
778 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->hw_free
)
779 rtd
->dai_link
->ops
->hw_free(substream
);
781 /* free any DMA resources */
782 if (platform
->driver
->ops
&& platform
->driver
->ops
->hw_free
)
783 platform
->driver
->ops
->hw_free(substream
);
785 /* now free hw params for the DAIs */
786 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->hw_free
)
787 codec_dai
->driver
->ops
->hw_free(substream
, codec_dai
);
789 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->hw_free
)
790 cpu_dai
->driver
->ops
->hw_free(substream
, cpu_dai
);
792 mutex_unlock(&rtd
->pcm_mutex
);
796 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
798 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
799 struct snd_soc_platform
*platform
= rtd
->platform
;
800 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
801 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
804 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->trigger
) {
805 ret
= codec_dai
->driver
->ops
->trigger(substream
, cmd
, codec_dai
);
810 if (platform
->driver
->ops
&& platform
->driver
->ops
->trigger
) {
811 ret
= platform
->driver
->ops
->trigger(substream
, cmd
);
816 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->trigger
) {
817 ret
= cpu_dai
->driver
->ops
->trigger(substream
, cmd
, cpu_dai
);
822 if (rtd
->dai_link
->ops
&& rtd
->dai_link
->ops
->trigger
) {
823 ret
= rtd
->dai_link
->ops
->trigger(substream
, cmd
);
831 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream
*substream
,
834 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
835 struct snd_soc_platform
*platform
= rtd
->platform
;
836 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
837 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
840 if (codec_dai
->driver
->ops
&&
841 codec_dai
->driver
->ops
->bespoke_trigger
) {
842 ret
= codec_dai
->driver
->ops
->bespoke_trigger(substream
, cmd
, codec_dai
);
847 if (platform
->driver
->bespoke_trigger
) {
848 ret
= platform
->driver
->bespoke_trigger(substream
, cmd
);
853 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->bespoke_trigger
) {
854 ret
= cpu_dai
->driver
->ops
->bespoke_trigger(substream
, cmd
, cpu_dai
);
861 * soc level wrapper for pointer callback
862 * If cpu_dai, codec_dai, platform driver has the delay callback, than
863 * the runtime->delay will be updated accordingly.
865 static snd_pcm_uframes_t
soc_pcm_pointer(struct snd_pcm_substream
*substream
)
867 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
868 struct snd_soc_platform
*platform
= rtd
->platform
;
869 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
870 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
871 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
872 snd_pcm_uframes_t offset
= 0;
873 snd_pcm_sframes_t delay
= 0;
875 if (platform
->driver
->ops
&& platform
->driver
->ops
->pointer
)
876 offset
= platform
->driver
->ops
->pointer(substream
);
878 if (cpu_dai
->driver
->ops
&& cpu_dai
->driver
->ops
->delay
)
879 delay
+= cpu_dai
->driver
->ops
->delay(substream
, cpu_dai
);
881 if (codec_dai
->driver
->ops
&& codec_dai
->driver
->ops
->delay
)
882 delay
+= codec_dai
->driver
->ops
->delay(substream
, codec_dai
);
884 if (platform
->driver
->delay
)
885 delay
+= platform
->driver
->delay(substream
, codec_dai
);
887 runtime
->delay
= delay
;
892 /* connect a FE and BE */
893 static int dpcm_be_connect(struct snd_soc_pcm_runtime
*fe
,
894 struct snd_soc_pcm_runtime
*be
, int stream
)
896 struct snd_soc_dpcm
*dpcm
;
898 /* only add new dpcms */
899 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
900 if (dpcm
->be
== be
&& dpcm
->fe
== fe
)
904 dpcm
= kzalloc(sizeof(struct snd_soc_dpcm
), GFP_KERNEL
);
910 be
->dpcm
[stream
].runtime
= fe
->dpcm
[stream
].runtime
;
911 dpcm
->state
= SND_SOC_DPCM_LINK_STATE_NEW
;
912 list_add(&dpcm
->list_be
, &fe
->dpcm
[stream
].be_clients
);
913 list_add(&dpcm
->list_fe
, &be
->dpcm
[stream
].fe_clients
);
915 dev_dbg(fe
->dev
, "connected new DPCM %s path %s %s %s\n",
916 stream
? "capture" : "playback", fe
->dai_link
->name
,
917 stream
? "<-" : "->", be
->dai_link
->name
);
919 #ifdef CONFIG_DEBUG_FS
920 dpcm
->debugfs_state
= debugfs_create_u32(be
->dai_link
->name
, 0644,
921 fe
->debugfs_dpcm_root
, &dpcm
->state
);
926 /* reparent a BE onto another FE */
927 static void dpcm_be_reparent(struct snd_soc_pcm_runtime
*fe
,
928 struct snd_soc_pcm_runtime
*be
, int stream
)
930 struct snd_soc_dpcm
*dpcm
;
931 struct snd_pcm_substream
*fe_substream
, *be_substream
;
933 /* reparent if BE is connected to other FEs */
934 if (!be
->dpcm
[stream
].users
)
937 be_substream
= snd_soc_dpcm_get_substream(be
, stream
);
939 list_for_each_entry(dpcm
, &be
->dpcm
[stream
].fe_clients
, list_fe
) {
943 dev_dbg(fe
->dev
, "reparent %s path %s %s %s\n",
944 stream
? "capture" : "playback",
945 dpcm
->fe
->dai_link
->name
,
946 stream
? "<-" : "->", dpcm
->be
->dai_link
->name
);
948 fe_substream
= snd_soc_dpcm_get_substream(dpcm
->fe
, stream
);
949 be_substream
->runtime
= fe_substream
->runtime
;
954 /* disconnect a BE and FE */
955 void dpcm_be_disconnect(struct snd_soc_pcm_runtime
*fe
, int stream
)
957 struct snd_soc_dpcm
*dpcm
, *d
;
959 list_for_each_entry_safe(dpcm
, d
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
960 dev_dbg(fe
->dev
, "ASoC: BE %s disconnect check for %s\n",
961 stream
? "capture" : "playback",
962 dpcm
->be
->dai_link
->name
);
964 if (dpcm
->state
!= SND_SOC_DPCM_LINK_STATE_FREE
)
967 dev_dbg(fe
->dev
, "freed DSP %s path %s %s %s\n",
968 stream
? "capture" : "playback", fe
->dai_link
->name
,
969 stream
? "<-" : "->", dpcm
->be
->dai_link
->name
);
971 /* BEs still alive need new FE */
972 dpcm_be_reparent(fe
, dpcm
->be
, stream
);
974 #ifdef CONFIG_DEBUG_FS
975 debugfs_remove(dpcm
->debugfs_state
);
977 list_del(&dpcm
->list_be
);
978 list_del(&dpcm
->list_fe
);
983 /* get BE for DAI widget and stream */
984 static struct snd_soc_pcm_runtime
*dpcm_get_be(struct snd_soc_card
*card
,
985 struct snd_soc_dapm_widget
*widget
, int stream
)
987 struct snd_soc_pcm_runtime
*be
;
990 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
991 for (i
= 0; i
< card
->num_links
; i
++) {
994 if (!be
->dai_link
->no_pcm
)
997 if (be
->cpu_dai
->playback_widget
== widget
||
998 be
->codec_dai
->playback_widget
== widget
)
1003 for (i
= 0; i
< card
->num_links
; i
++) {
1006 if (!be
->dai_link
->no_pcm
)
1009 if (be
->cpu_dai
->capture_widget
== widget
||
1010 be
->codec_dai
->capture_widget
== widget
)
1015 dev_err(card
->dev
, "ASoC: can't get %s BE for %s\n",
1016 stream
? "capture" : "playback", widget
->name
);
1020 static inline struct snd_soc_dapm_widget
*
1021 dai_get_widget(struct snd_soc_dai
*dai
, int stream
)
1023 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
1024 return dai
->playback_widget
;
1026 return dai
->capture_widget
;
1029 static int widget_in_list(struct snd_soc_dapm_widget_list
*list
,
1030 struct snd_soc_dapm_widget
*widget
)
1034 for (i
= 0; i
< list
->num_widgets
; i
++) {
1035 if (widget
== list
->widgets
[i
])
1042 int dpcm_path_get(struct snd_soc_pcm_runtime
*fe
,
1043 int stream
, struct snd_soc_dapm_widget_list
**list_
)
1045 struct snd_soc_dai
*cpu_dai
= fe
->cpu_dai
;
1046 struct snd_soc_dapm_widget_list
*list
;
1049 list
= kzalloc(sizeof(struct snd_soc_dapm_widget_list
) +
1050 sizeof(struct snd_soc_dapm_widget
*), GFP_KERNEL
);
1054 /* get number of valid DAI paths and their widgets */
1055 paths
= snd_soc_dapm_dai_get_connected_widgets(cpu_dai
, stream
, &list
);
1057 dev_dbg(fe
->dev
, "ASoC: found %d audio %s paths\n", paths
,
1058 stream
? "capture" : "playback");
1064 static int dpcm_prune_paths(struct snd_soc_pcm_runtime
*fe
, int stream
,
1065 struct snd_soc_dapm_widget_list
**list_
)
1067 struct snd_soc_dpcm
*dpcm
;
1068 struct snd_soc_dapm_widget_list
*list
= *list_
;
1069 struct snd_soc_dapm_widget
*widget
;
1072 /* Destroy any old FE <--> BE connections */
1073 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1075 /* is there a valid CPU DAI widget for this BE */
1076 widget
= dai_get_widget(dpcm
->be
->cpu_dai
, stream
);
1078 /* prune the BE if it's no longer in our active list */
1079 if (widget
&& widget_in_list(list
, widget
))
1082 /* is there a valid CODEC DAI widget for this BE */
1083 widget
= dai_get_widget(dpcm
->be
->codec_dai
, stream
);
1085 /* prune the BE if it's no longer in our active list */
1086 if (widget
&& widget_in_list(list
, widget
))
1089 dev_dbg(fe
->dev
, "ASoC: pruning %s BE %s for %s\n",
1090 stream
? "capture" : "playback",
1091 dpcm
->be
->dai_link
->name
, fe
->dai_link
->name
);
1092 dpcm
->state
= SND_SOC_DPCM_LINK_STATE_FREE
;
1093 dpcm
->be
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_BE
;
1097 dev_dbg(fe
->dev
, "ASoC: found %d old BE paths for pruning\n", prune
);
1101 static int dpcm_add_paths(struct snd_soc_pcm_runtime
*fe
, int stream
,
1102 struct snd_soc_dapm_widget_list
**list_
)
1104 struct snd_soc_card
*card
= fe
->card
;
1105 struct snd_soc_dapm_widget_list
*list
= *list_
;
1106 struct snd_soc_pcm_runtime
*be
;
1107 int i
, new = 0, err
;
1109 /* Create any new FE <--> BE connections */
1110 for (i
= 0; i
< list
->num_widgets
; i
++) {
1112 switch (list
->widgets
[i
]->id
) {
1113 case snd_soc_dapm_dai_in
:
1114 case snd_soc_dapm_dai_out
:
1120 /* is there a valid BE rtd for this widget */
1121 be
= dpcm_get_be(card
, list
->widgets
[i
], stream
);
1123 dev_err(fe
->dev
, "ASoC: no BE found for %s\n",
1124 list
->widgets
[i
]->name
);
1128 /* make sure BE is a real BE */
1129 if (!be
->dai_link
->no_pcm
)
1132 /* don't connect if FE is not running */
1133 if (!fe
->dpcm
[stream
].runtime
&& !fe
->fe_compr
)
1136 /* newly connected FE and BE */
1137 err
= dpcm_be_connect(fe
, be
, stream
);
1139 dev_err(fe
->dev
, "ASoC: can't connect %s\n",
1140 list
->widgets
[i
]->name
);
1142 } else if (err
== 0) /* already connected */
1146 be
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_BE
;
1150 dev_dbg(fe
->dev
, "ASoC: found %d new BE paths\n", new);
1155 * Find the corresponding BE DAIs that source or sink audio to this
1158 int dpcm_process_paths(struct snd_soc_pcm_runtime
*fe
,
1159 int stream
, struct snd_soc_dapm_widget_list
**list
, int new)
1162 return dpcm_add_paths(fe
, stream
, list
);
1164 return dpcm_prune_paths(fe
, stream
, list
);
1167 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime
*fe
, int stream
)
1169 struct snd_soc_dpcm
*dpcm
;
1171 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
)
1172 dpcm
->be
->dpcm
[stream
].runtime_update
=
1173 SND_SOC_DPCM_UPDATE_NO
;
1176 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime
*fe
,
1179 struct snd_soc_dpcm
*dpcm
;
1181 /* disable any enabled and non active backends */
1182 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1184 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1185 struct snd_pcm_substream
*be_substream
=
1186 snd_soc_dpcm_get_substream(be
, stream
);
1188 if (be
->dpcm
[stream
].users
== 0)
1189 dev_err(be
->dev
, "ASoC: no users %s at close - state %d\n",
1190 stream
? "capture" : "playback",
1191 be
->dpcm
[stream
].state
);
1193 if (--be
->dpcm
[stream
].users
!= 0)
1196 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_OPEN
)
1199 soc_pcm_close(be_substream
);
1200 be_substream
->runtime
= NULL
;
1201 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_CLOSE
;
1205 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime
*fe
, int stream
)
1207 struct snd_soc_dpcm
*dpcm
;
1210 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1211 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1213 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1214 struct snd_pcm_substream
*be_substream
=
1215 snd_soc_dpcm_get_substream(be
, stream
);
1217 if (!be_substream
) {
1218 dev_err(be
->dev
, "ASoC: no backend %s stream\n",
1219 stream
? "capture" : "playback");
1223 /* is this op for this BE ? */
1224 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1227 /* first time the dpcm is open ? */
1228 if (be
->dpcm
[stream
].users
== DPCM_MAX_BE_USERS
)
1229 dev_err(be
->dev
, "ASoC: too many users %s at open %d\n",
1230 stream
? "capture" : "playback",
1231 be
->dpcm
[stream
].state
);
1233 if (be
->dpcm
[stream
].users
++ != 0)
1236 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_NEW
) &&
1237 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_CLOSE
))
1240 dev_dbg(be
->dev
, "ASoC: open %s BE %s\n",
1241 stream
? "capture" : "playback", be
->dai_link
->name
);
1243 be_substream
->runtime
= be
->dpcm
[stream
].runtime
;
1244 err
= soc_pcm_open(be_substream
);
1246 dev_err(be
->dev
, "ASoC: BE open failed %d\n", err
);
1247 be
->dpcm
[stream
].users
--;
1248 if (be
->dpcm
[stream
].users
< 0)
1249 dev_err(be
->dev
, "ASoC: no users %s at unwind %d\n",
1250 stream
? "capture" : "playback",
1251 be
->dpcm
[stream
].state
);
1253 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_CLOSE
;
1257 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_OPEN
;
1264 /* disable any enabled and non active backends */
1265 list_for_each_entry_continue_reverse(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1266 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1267 struct snd_pcm_substream
*be_substream
=
1268 snd_soc_dpcm_get_substream(be
, stream
);
1270 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1273 if (be
->dpcm
[stream
].users
== 0)
1274 dev_err(be
->dev
, "ASoC: no users %s at close %d\n",
1275 stream
? "capture" : "playback",
1276 be
->dpcm
[stream
].state
);
1278 if (--be
->dpcm
[stream
].users
!= 0)
1281 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_OPEN
)
1284 soc_pcm_close(be_substream
);
1285 be_substream
->runtime
= NULL
;
1286 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_CLOSE
;
1292 static void dpcm_init_runtime_hw(struct snd_pcm_runtime
*runtime
,
1293 struct snd_soc_pcm_stream
*stream
)
1295 runtime
->hw
.rate_min
= stream
->rate_min
;
1296 runtime
->hw
.rate_max
= stream
->rate_max
;
1297 runtime
->hw
.channels_min
= stream
->channels_min
;
1298 runtime
->hw
.channels_max
= stream
->channels_max
;
1299 if (runtime
->hw
.formats
)
1300 runtime
->hw
.formats
&= stream
->formats
;
1302 runtime
->hw
.formats
= stream
->formats
;
1303 runtime
->hw
.rates
= stream
->rates
;
1306 static void dpcm_set_fe_runtime(struct snd_pcm_substream
*substream
)
1308 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1309 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
1310 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
1311 struct snd_soc_dai_driver
*cpu_dai_drv
= cpu_dai
->driver
;
1313 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
1314 dpcm_init_runtime_hw(runtime
, &cpu_dai_drv
->playback
);
1316 dpcm_init_runtime_hw(runtime
, &cpu_dai_drv
->capture
);
1319 static int dpcm_fe_dai_startup(struct snd_pcm_substream
*fe_substream
)
1321 struct snd_soc_pcm_runtime
*fe
= fe_substream
->private_data
;
1322 struct snd_pcm_runtime
*runtime
= fe_substream
->runtime
;
1323 int stream
= fe_substream
->stream
, ret
= 0;
1325 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1327 ret
= dpcm_be_dai_startup(fe
, fe_substream
->stream
);
1329 dev_err(fe
->dev
,"ASoC: failed to start some BEs %d\n", ret
);
1333 dev_dbg(fe
->dev
, "ASoC: open FE %s\n", fe
->dai_link
->name
);
1335 /* start the DAI frontend */
1336 ret
= soc_pcm_open(fe_substream
);
1338 dev_err(fe
->dev
,"ASoC: failed to start FE %d\n", ret
);
1342 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_OPEN
;
1344 dpcm_set_fe_runtime(fe_substream
);
1345 snd_pcm_limit_hw_rates(runtime
);
1347 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1351 dpcm_be_dai_startup_unwind(fe
, fe_substream
->stream
);
1353 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1357 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime
*fe
, int stream
)
1359 struct snd_soc_dpcm
*dpcm
;
1361 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1362 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1364 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1365 struct snd_pcm_substream
*be_substream
=
1366 snd_soc_dpcm_get_substream(be
, stream
);
1368 /* is this op for this BE ? */
1369 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1372 if (be
->dpcm
[stream
].users
== 0)
1373 dev_err(be
->dev
, "ASoC: no users %s at close - state %d\n",
1374 stream
? "capture" : "playback",
1375 be
->dpcm
[stream
].state
);
1377 if (--be
->dpcm
[stream
].users
!= 0)
1380 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_FREE
) &&
1381 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_OPEN
))
1384 dev_dbg(be
->dev
, "ASoC: close BE %s\n",
1385 dpcm
->fe
->dai_link
->name
);
1387 soc_pcm_close(be_substream
);
1388 be_substream
->runtime
= NULL
;
1390 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_CLOSE
;
1395 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream
*substream
)
1397 struct snd_soc_pcm_runtime
*fe
= substream
->private_data
;
1398 int stream
= substream
->stream
;
1400 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1402 /* shutdown the BEs */
1403 dpcm_be_dai_shutdown(fe
, substream
->stream
);
1405 dev_dbg(fe
->dev
, "ASoC: close FE %s\n", fe
->dai_link
->name
);
1407 /* now shutdown the frontend */
1408 soc_pcm_close(substream
);
1410 /* run the stream event for each BE */
1411 dpcm_dapm_stream_event(fe
, stream
, SND_SOC_DAPM_STREAM_STOP
);
1413 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_CLOSE
;
1414 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1418 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime
*fe
, int stream
)
1420 struct snd_soc_dpcm
*dpcm
;
1422 /* only hw_params backends that are either sinks or sources
1423 * to this frontend DAI */
1424 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1426 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1427 struct snd_pcm_substream
*be_substream
=
1428 snd_soc_dpcm_get_substream(be
, stream
);
1430 /* is this op for this BE ? */
1431 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1434 /* only free hw when no longer used - check all FEs */
1435 if (!snd_soc_dpcm_can_be_free_stop(fe
, be
, stream
))
1438 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
1439 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_PREPARE
) &&
1440 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_FREE
) &&
1441 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_PAUSED
) &&
1442 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_STOP
))
1445 dev_dbg(be
->dev
, "ASoC: hw_free BE %s\n",
1446 dpcm
->fe
->dai_link
->name
);
1448 soc_pcm_hw_free(be_substream
);
1450 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_HW_FREE
;
1456 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream
*substream
)
1458 struct snd_soc_pcm_runtime
*fe
= substream
->private_data
;
1459 int err
, stream
= substream
->stream
;
1461 mutex_lock_nested(&fe
->card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
1462 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1464 dev_dbg(fe
->dev
, "ASoC: hw_free FE %s\n", fe
->dai_link
->name
);
1466 /* call hw_free on the frontend */
1467 err
= soc_pcm_hw_free(substream
);
1469 dev_err(fe
->dev
,"ASoC: hw_free FE %s failed\n",
1470 fe
->dai_link
->name
);
1472 /* only hw_params backends that are either sinks or sources
1473 * to this frontend DAI */
1474 err
= dpcm_be_dai_hw_free(fe
, stream
);
1476 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_HW_FREE
;
1477 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1479 mutex_unlock(&fe
->card
->mutex
);
1483 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime
*fe
, int stream
)
1485 struct snd_soc_dpcm
*dpcm
;
1488 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1490 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1491 struct snd_pcm_substream
*be_substream
=
1492 snd_soc_dpcm_get_substream(be
, stream
);
1494 /* is this op for this BE ? */
1495 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1498 /* only allow hw_params() if no connected FEs are running */
1499 if (!snd_soc_dpcm_can_be_params(fe
, be
, stream
))
1502 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_OPEN
) &&
1503 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
1504 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_FREE
))
1507 dev_dbg(be
->dev
, "ASoC: hw_params BE %s\n",
1508 dpcm
->fe
->dai_link
->name
);
1510 /* copy params for each dpcm */
1511 memcpy(&dpcm
->hw_params
, &fe
->dpcm
[stream
].hw_params
,
1512 sizeof(struct snd_pcm_hw_params
));
1514 /* perform any hw_params fixups */
1515 if (be
->dai_link
->be_hw_params_fixup
) {
1516 ret
= be
->dai_link
->be_hw_params_fixup(be
,
1520 "ASoC: hw_params BE fixup failed %d\n",
1526 ret
= soc_pcm_hw_params(be_substream
, &dpcm
->hw_params
);
1528 dev_err(dpcm
->be
->dev
,
1529 "ASoC: hw_params BE failed %d\n", ret
);
1533 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_HW_PARAMS
;
1538 /* disable any enabled and non active backends */
1539 list_for_each_entry_continue_reverse(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1540 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1541 struct snd_pcm_substream
*be_substream
=
1542 snd_soc_dpcm_get_substream(be
, stream
);
1544 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1547 /* only allow hw_free() if no connected FEs are running */
1548 if (!snd_soc_dpcm_can_be_free_stop(fe
, be
, stream
))
1551 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_OPEN
) &&
1552 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
1553 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_FREE
) &&
1554 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_STOP
))
1557 soc_pcm_hw_free(be_substream
);
1563 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream
*substream
,
1564 struct snd_pcm_hw_params
*params
)
1566 struct snd_soc_pcm_runtime
*fe
= substream
->private_data
;
1567 int ret
, stream
= substream
->stream
;
1569 mutex_lock_nested(&fe
->card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
1570 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1572 memcpy(&fe
->dpcm
[substream
->stream
].hw_params
, params
,
1573 sizeof(struct snd_pcm_hw_params
));
1574 ret
= dpcm_be_dai_hw_params(fe
, substream
->stream
);
1576 dev_err(fe
->dev
,"ASoC: hw_params BE failed %d\n", ret
);
1580 dev_dbg(fe
->dev
, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1581 fe
->dai_link
->name
, params_rate(params
),
1582 params_channels(params
), params_format(params
));
1584 /* call hw_params on the frontend */
1585 ret
= soc_pcm_hw_params(substream
, params
);
1587 dev_err(fe
->dev
,"ASoC: hw_params FE failed %d\n", ret
);
1588 dpcm_be_dai_hw_free(fe
, stream
);
1590 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_HW_PARAMS
;
1593 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1594 mutex_unlock(&fe
->card
->mutex
);
1598 static int dpcm_do_trigger(struct snd_soc_dpcm
*dpcm
,
1599 struct snd_pcm_substream
*substream
, int cmd
)
1603 dev_dbg(dpcm
->be
->dev
, "ASoC: trigger BE %s cmd %d\n",
1604 dpcm
->fe
->dai_link
->name
, cmd
);
1606 ret
= soc_pcm_trigger(substream
, cmd
);
1608 dev_err(dpcm
->be
->dev
,"ASoC: trigger BE failed %d\n", ret
);
1613 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime
*fe
, int stream
,
1616 struct snd_soc_dpcm
*dpcm
;
1619 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1621 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1622 struct snd_pcm_substream
*be_substream
=
1623 snd_soc_dpcm_get_substream(be
, stream
);
1625 /* is this op for this BE ? */
1626 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1630 case SNDRV_PCM_TRIGGER_START
:
1631 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_PREPARE
) &&
1632 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_STOP
))
1635 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1639 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_START
;
1641 case SNDRV_PCM_TRIGGER_RESUME
:
1642 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_SUSPEND
))
1645 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1649 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_START
;
1651 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1652 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_PAUSED
))
1655 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1659 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_START
;
1661 case SNDRV_PCM_TRIGGER_STOP
:
1662 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_START
)
1665 if (!snd_soc_dpcm_can_be_free_stop(fe
, be
, stream
))
1668 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1672 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_STOP
;
1674 case SNDRV_PCM_TRIGGER_SUSPEND
:
1675 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_START
)
1678 if (!snd_soc_dpcm_can_be_free_stop(fe
, be
, stream
))
1681 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1685 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_SUSPEND
;
1687 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1688 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_START
)
1691 if (!snd_soc_dpcm_can_be_free_stop(fe
, be
, stream
))
1694 ret
= dpcm_do_trigger(dpcm
, be_substream
, cmd
);
1698 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_PAUSED
;
1705 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger
);
1707 static int dpcm_fe_dai_trigger(struct snd_pcm_substream
*substream
, int cmd
)
1709 struct snd_soc_pcm_runtime
*fe
= substream
->private_data
;
1710 int stream
= substream
->stream
, ret
;
1711 enum snd_soc_dpcm_trigger trigger
= fe
->dai_link
->trigger
[stream
];
1713 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1716 case SND_SOC_DPCM_TRIGGER_PRE
:
1717 /* call trigger on the frontend before the backend. */
1719 dev_dbg(fe
->dev
, "ASoC: pre trigger FE %s cmd %d\n",
1720 fe
->dai_link
->name
, cmd
);
1722 ret
= soc_pcm_trigger(substream
, cmd
);
1724 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", ret
);
1728 ret
= dpcm_be_dai_trigger(fe
, substream
->stream
, cmd
);
1730 case SND_SOC_DPCM_TRIGGER_POST
:
1731 /* call trigger on the frontend after the backend. */
1733 ret
= dpcm_be_dai_trigger(fe
, substream
->stream
, cmd
);
1735 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", ret
);
1739 dev_dbg(fe
->dev
, "ASoC: post trigger FE %s cmd %d\n",
1740 fe
->dai_link
->name
, cmd
);
1742 ret
= soc_pcm_trigger(substream
, cmd
);
1744 case SND_SOC_DPCM_TRIGGER_BESPOKE
:
1745 /* bespoke trigger() - handles both FE and BEs */
1747 dev_dbg(fe
->dev
, "ASoC: bespoke trigger FE %s cmd %d\n",
1748 fe
->dai_link
->name
, cmd
);
1750 ret
= soc_pcm_bespoke_trigger(substream
, cmd
);
1752 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", ret
);
1757 dev_err(fe
->dev
, "ASoC: invalid trigger cmd %d for %s\n", cmd
,
1758 fe
->dai_link
->name
);
1764 case SNDRV_PCM_TRIGGER_START
:
1765 case SNDRV_PCM_TRIGGER_RESUME
:
1766 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1767 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_START
;
1769 case SNDRV_PCM_TRIGGER_STOP
:
1770 case SNDRV_PCM_TRIGGER_SUSPEND
:
1771 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1772 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_STOP
;
1777 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1781 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime
*fe
, int stream
)
1783 struct snd_soc_dpcm
*dpcm
;
1786 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1788 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1789 struct snd_pcm_substream
*be_substream
=
1790 snd_soc_dpcm_get_substream(be
, stream
);
1792 /* is this op for this BE ? */
1793 if (!snd_soc_dpcm_be_can_update(fe
, be
, stream
))
1796 if ((be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
1797 (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_STOP
))
1800 dev_dbg(be
->dev
, "ASoC: prepare BE %s\n",
1801 dpcm
->fe
->dai_link
->name
);
1803 ret
= soc_pcm_prepare(be_substream
);
1805 dev_err(be
->dev
, "ASoC: backend prepare failed %d\n",
1810 be
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_PREPARE
;
1815 static int dpcm_fe_dai_prepare(struct snd_pcm_substream
*substream
)
1817 struct snd_soc_pcm_runtime
*fe
= substream
->private_data
;
1818 int stream
= substream
->stream
, ret
= 0;
1820 mutex_lock_nested(&fe
->card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
1822 dev_dbg(fe
->dev
, "ASoC: prepare FE %s\n", fe
->dai_link
->name
);
1824 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_FE
;
1826 /* there is no point preparing this FE if there are no BEs */
1827 if (list_empty(&fe
->dpcm
[stream
].be_clients
)) {
1828 dev_err(fe
->dev
, "ASoC: no backend DAIs enabled for %s\n",
1829 fe
->dai_link
->name
);
1834 ret
= dpcm_be_dai_prepare(fe
, substream
->stream
);
1838 /* call prepare on the frontend */
1839 ret
= soc_pcm_prepare(substream
);
1841 dev_err(fe
->dev
,"ASoC: prepare FE %s failed\n",
1842 fe
->dai_link
->name
);
1846 /* run the stream event for each BE */
1847 dpcm_dapm_stream_event(fe
, stream
, SND_SOC_DAPM_STREAM_START
);
1848 fe
->dpcm
[stream
].state
= SND_SOC_DPCM_STATE_PREPARE
;
1851 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
1852 mutex_unlock(&fe
->card
->mutex
);
1857 static int soc_pcm_ioctl(struct snd_pcm_substream
*substream
,
1858 unsigned int cmd
, void *arg
)
1860 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
1861 struct snd_soc_platform
*platform
= rtd
->platform
;
1863 if (platform
->driver
->ops
&& platform
->driver
->ops
->ioctl
)
1864 return platform
->driver
->ops
->ioctl(substream
, cmd
, arg
);
1865 return snd_pcm_lib_ioctl(substream
, cmd
, arg
);
1868 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime
*fe
, int stream
)
1870 struct snd_pcm_substream
*substream
=
1871 snd_soc_dpcm_get_substream(fe
, stream
);
1872 enum snd_soc_dpcm_trigger trigger
= fe
->dai_link
->trigger
[stream
];
1875 dev_dbg(fe
->dev
, "ASoC: runtime %s close on FE %s\n",
1876 stream
? "capture" : "playback", fe
->dai_link
->name
);
1878 if (trigger
== SND_SOC_DPCM_TRIGGER_BESPOKE
) {
1879 /* call bespoke trigger - FE takes care of all BE triggers */
1880 dev_dbg(fe
->dev
, "ASoC: bespoke trigger FE %s cmd stop\n",
1881 fe
->dai_link
->name
);
1883 err
= soc_pcm_bespoke_trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
1885 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", err
);
1887 dev_dbg(fe
->dev
, "ASoC: trigger FE %s cmd stop\n",
1888 fe
->dai_link
->name
);
1890 err
= dpcm_be_dai_trigger(fe
, stream
, SNDRV_PCM_TRIGGER_STOP
);
1892 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", err
);
1895 err
= dpcm_be_dai_hw_free(fe
, stream
);
1897 dev_err(fe
->dev
,"ASoC: hw_free FE failed %d\n", err
);
1899 err
= dpcm_be_dai_shutdown(fe
, stream
);
1901 dev_err(fe
->dev
,"ASoC: shutdown FE failed %d\n", err
);
1903 /* run the stream event for each BE */
1904 dpcm_dapm_stream_event(fe
, stream
, SND_SOC_DAPM_STREAM_NOP
);
1909 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime
*fe
, int stream
)
1911 struct snd_pcm_substream
*substream
=
1912 snd_soc_dpcm_get_substream(fe
, stream
);
1913 struct snd_soc_dpcm
*dpcm
;
1914 enum snd_soc_dpcm_trigger trigger
= fe
->dai_link
->trigger
[stream
];
1917 dev_dbg(fe
->dev
, "ASoC: runtime %s open on FE %s\n",
1918 stream
? "capture" : "playback", fe
->dai_link
->name
);
1920 /* Only start the BE if the FE is ready */
1921 if (fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_HW_FREE
||
1922 fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_CLOSE
)
1925 /* startup must always be called for new BEs */
1926 ret
= dpcm_be_dai_startup(fe
, stream
);
1930 /* keep going if FE state is > open */
1931 if (fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_OPEN
)
1934 ret
= dpcm_be_dai_hw_params(fe
, stream
);
1938 /* keep going if FE state is > hw_params */
1939 if (fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_HW_PARAMS
)
1943 ret
= dpcm_be_dai_prepare(fe
, stream
);
1947 /* run the stream event for each BE */
1948 dpcm_dapm_stream_event(fe
, stream
, SND_SOC_DAPM_STREAM_NOP
);
1950 /* keep going if FE state is > prepare */
1951 if (fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_PREPARE
||
1952 fe
->dpcm
[stream
].state
== SND_SOC_DPCM_STATE_STOP
)
1955 if (trigger
== SND_SOC_DPCM_TRIGGER_BESPOKE
) {
1956 /* call trigger on the frontend - FE takes care of all BE triggers */
1957 dev_dbg(fe
->dev
, "ASoC: bespoke trigger FE %s cmd start\n",
1958 fe
->dai_link
->name
);
1960 ret
= soc_pcm_bespoke_trigger(substream
, SNDRV_PCM_TRIGGER_START
);
1962 dev_err(fe
->dev
,"ASoC: bespoke trigger FE failed %d\n", ret
);
1966 dev_dbg(fe
->dev
, "ASoC: trigger FE %s cmd start\n",
1967 fe
->dai_link
->name
);
1969 ret
= dpcm_be_dai_trigger(fe
, stream
,
1970 SNDRV_PCM_TRIGGER_START
);
1972 dev_err(fe
->dev
,"ASoC: trigger FE failed %d\n", ret
);
1980 dpcm_be_dai_hw_free(fe
, stream
);
1982 dpcm_be_dai_shutdown(fe
, stream
);
1984 /* disconnect any non started BEs */
1985 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
1986 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
1987 if (be
->dpcm
[stream
].state
!= SND_SOC_DPCM_STATE_START
)
1988 dpcm
->state
= SND_SOC_DPCM_LINK_STATE_FREE
;
1994 static int dpcm_run_new_update(struct snd_soc_pcm_runtime
*fe
, int stream
)
1998 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_BE
;
1999 ret
= dpcm_run_update_startup(fe
, stream
);
2001 dev_err(fe
->dev
, "ASoC: failed to startup some BEs\n");
2002 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
2007 static int dpcm_run_old_update(struct snd_soc_pcm_runtime
*fe
, int stream
)
2011 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_BE
;
2012 ret
= dpcm_run_update_shutdown(fe
, stream
);
2014 dev_err(fe
->dev
, "ASoC: failed to shutdown some BEs\n");
2015 fe
->dpcm
[stream
].runtime_update
= SND_SOC_DPCM_UPDATE_NO
;
2020 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2023 int soc_dpcm_runtime_update(struct snd_soc_card
*card
)
2025 int i
, old
, new, paths
;
2027 mutex_lock_nested(&card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
2028 for (i
= 0; i
< card
->num_rtd
; i
++) {
2029 struct snd_soc_dapm_widget_list
*list
;
2030 struct snd_soc_pcm_runtime
*fe
= &card
->rtd
[i
];
2032 /* make sure link is FE */
2033 if (!fe
->dai_link
->dynamic
)
2036 /* only check active links */
2037 if (!fe
->cpu_dai
->active
)
2040 /* DAPM sync will call this to update DSP paths */
2041 dev_dbg(fe
->dev
, "ASoC: DPCM runtime update for FE %s\n",
2042 fe
->dai_link
->name
);
2044 /* skip if FE doesn't have playback capability */
2045 if (!fe
->cpu_dai
->driver
->playback
.channels_min
)
2048 paths
= dpcm_path_get(fe
, SNDRV_PCM_STREAM_PLAYBACK
, &list
);
2050 dev_warn(fe
->dev
, "ASoC: %s no valid %s path\n",
2051 fe
->dai_link
->name
, "playback");
2052 mutex_unlock(&card
->mutex
);
2056 /* update any new playback paths */
2057 new = dpcm_process_paths(fe
, SNDRV_PCM_STREAM_PLAYBACK
, &list
, 1);
2059 dpcm_run_new_update(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2060 dpcm_clear_pending_state(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2061 dpcm_be_disconnect(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2064 /* update any old playback paths */
2065 old
= dpcm_process_paths(fe
, SNDRV_PCM_STREAM_PLAYBACK
, &list
, 0);
2067 dpcm_run_old_update(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2068 dpcm_clear_pending_state(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2069 dpcm_be_disconnect(fe
, SNDRV_PCM_STREAM_PLAYBACK
);
2073 /* skip if FE doesn't have capture capability */
2074 if (!fe
->cpu_dai
->driver
->capture
.channels_min
)
2077 paths
= dpcm_path_get(fe
, SNDRV_PCM_STREAM_CAPTURE
, &list
);
2079 dev_warn(fe
->dev
, "ASoC: %s no valid %s path\n",
2080 fe
->dai_link
->name
, "capture");
2081 mutex_unlock(&card
->mutex
);
2085 /* update any new capture paths */
2086 new = dpcm_process_paths(fe
, SNDRV_PCM_STREAM_CAPTURE
, &list
, 1);
2088 dpcm_run_new_update(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2089 dpcm_clear_pending_state(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2090 dpcm_be_disconnect(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2093 /* update any old capture paths */
2094 old
= dpcm_process_paths(fe
, SNDRV_PCM_STREAM_CAPTURE
, &list
, 0);
2096 dpcm_run_old_update(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2097 dpcm_clear_pending_state(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2098 dpcm_be_disconnect(fe
, SNDRV_PCM_STREAM_CAPTURE
);
2101 dpcm_path_put(&list
);
2104 mutex_unlock(&card
->mutex
);
2107 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime
*fe
, int mute
)
2109 struct snd_soc_dpcm
*dpcm
;
2110 struct list_head
*clients
=
2111 &fe
->dpcm
[SNDRV_PCM_STREAM_PLAYBACK
].be_clients
;
2113 list_for_each_entry(dpcm
, clients
, list_be
) {
2115 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
2116 struct snd_soc_dai
*dai
= be
->codec_dai
;
2117 struct snd_soc_dai_driver
*drv
= dai
->driver
;
2119 if (be
->dai_link
->ignore_suspend
)
2122 dev_dbg(be
->dev
, "ASoC: BE digital mute %s\n", be
->dai_link
->name
);
2124 if (drv
->ops
&& drv
->ops
->digital_mute
&& dai
->playback_active
)
2125 drv
->ops
->digital_mute(dai
, mute
);
2131 static int dpcm_fe_dai_open(struct snd_pcm_substream
*fe_substream
)
2133 struct snd_soc_pcm_runtime
*fe
= fe_substream
->private_data
;
2134 struct snd_soc_dpcm
*dpcm
;
2135 struct snd_soc_dapm_widget_list
*list
;
2137 int stream
= fe_substream
->stream
;
2139 mutex_lock_nested(&fe
->card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
2140 fe
->dpcm
[stream
].runtime
= fe_substream
->runtime
;
2142 if (dpcm_path_get(fe
, stream
, &list
) <= 0) {
2143 dev_dbg(fe
->dev
, "ASoC: %s no valid %s route\n",
2144 fe
->dai_link
->name
, stream
? "capture" : "playback");
2147 /* calculate valid and active FE <-> BE dpcms */
2148 dpcm_process_paths(fe
, stream
, &list
, 1);
2150 ret
= dpcm_fe_dai_startup(fe_substream
);
2152 /* clean up all links */
2153 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
)
2154 dpcm
->state
= SND_SOC_DPCM_LINK_STATE_FREE
;
2156 dpcm_be_disconnect(fe
, stream
);
2157 fe
->dpcm
[stream
].runtime
= NULL
;
2160 dpcm_clear_pending_state(fe
, stream
);
2161 dpcm_path_put(&list
);
2162 mutex_unlock(&fe
->card
->mutex
);
2166 static int dpcm_fe_dai_close(struct snd_pcm_substream
*fe_substream
)
2168 struct snd_soc_pcm_runtime
*fe
= fe_substream
->private_data
;
2169 struct snd_soc_dpcm
*dpcm
;
2170 int stream
= fe_substream
->stream
, ret
;
2172 mutex_lock_nested(&fe
->card
->mutex
, SND_SOC_CARD_CLASS_RUNTIME
);
2173 ret
= dpcm_fe_dai_shutdown(fe_substream
);
2175 /* mark FE's links ready to prune */
2176 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
)
2177 dpcm
->state
= SND_SOC_DPCM_LINK_STATE_FREE
;
2179 dpcm_be_disconnect(fe
, stream
);
2181 fe
->dpcm
[stream
].runtime
= NULL
;
2182 mutex_unlock(&fe
->card
->mutex
);
2186 /* create a new pcm */
2187 int soc_new_pcm(struct snd_soc_pcm_runtime
*rtd
, int num
)
2189 struct snd_soc_platform
*platform
= rtd
->platform
;
2190 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
2191 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
2192 struct snd_pcm
*pcm
;
2194 int ret
= 0, playback
= 0, capture
= 0;
2196 if (rtd
->dai_link
->dynamic
|| rtd
->dai_link
->no_pcm
) {
2197 playback
= rtd
->dai_link
->dpcm_playback
;
2198 capture
= rtd
->dai_link
->dpcm_capture
;
2200 if (codec_dai
->driver
->playback
.channels_min
&&
2201 cpu_dai
->driver
->playback
.channels_min
)
2203 if (codec_dai
->driver
->capture
.channels_min
&&
2204 cpu_dai
->driver
->capture
.channels_min
)
2208 if (rtd
->dai_link
->playback_only
) {
2213 if (rtd
->dai_link
->capture_only
) {
2218 /* create the PCM */
2219 if (rtd
->dai_link
->no_pcm
) {
2220 snprintf(new_name
, sizeof(new_name
), "(%s)",
2221 rtd
->dai_link
->stream_name
);
2223 ret
= snd_pcm_new_internal(rtd
->card
->snd_card
, new_name
, num
,
2224 playback
, capture
, &pcm
);
2226 if (rtd
->dai_link
->dynamic
)
2227 snprintf(new_name
, sizeof(new_name
), "%s (*)",
2228 rtd
->dai_link
->stream_name
);
2230 snprintf(new_name
, sizeof(new_name
), "%s %s-%d",
2231 rtd
->dai_link
->stream_name
, codec_dai
->name
, num
);
2233 ret
= snd_pcm_new(rtd
->card
->snd_card
, new_name
, num
, playback
,
2237 dev_err(rtd
->card
->dev
, "ASoC: can't create pcm for %s\n",
2238 rtd
->dai_link
->name
);
2241 dev_dbg(rtd
->card
->dev
, "ASoC: registered pcm #%d %s\n",num
, new_name
);
2243 /* DAPM dai link stream work */
2244 INIT_DELAYED_WORK(&rtd
->delayed_work
, close_delayed_work
);
2247 pcm
->private_data
= rtd
;
2249 if (rtd
->dai_link
->no_pcm
) {
2251 pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
->private_data
= rtd
;
2253 pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
->private_data
= rtd
;
2257 /* ASoC PCM operations */
2258 if (rtd
->dai_link
->dynamic
) {
2259 rtd
->ops
.open
= dpcm_fe_dai_open
;
2260 rtd
->ops
.hw_params
= dpcm_fe_dai_hw_params
;
2261 rtd
->ops
.prepare
= dpcm_fe_dai_prepare
;
2262 rtd
->ops
.trigger
= dpcm_fe_dai_trigger
;
2263 rtd
->ops
.hw_free
= dpcm_fe_dai_hw_free
;
2264 rtd
->ops
.close
= dpcm_fe_dai_close
;
2265 rtd
->ops
.pointer
= soc_pcm_pointer
;
2266 rtd
->ops
.ioctl
= soc_pcm_ioctl
;
2268 rtd
->ops
.open
= soc_pcm_open
;
2269 rtd
->ops
.hw_params
= soc_pcm_hw_params
;
2270 rtd
->ops
.prepare
= soc_pcm_prepare
;
2271 rtd
->ops
.trigger
= soc_pcm_trigger
;
2272 rtd
->ops
.hw_free
= soc_pcm_hw_free
;
2273 rtd
->ops
.close
= soc_pcm_close
;
2274 rtd
->ops
.pointer
= soc_pcm_pointer
;
2275 rtd
->ops
.ioctl
= soc_pcm_ioctl
;
2278 if (platform
->driver
->ops
) {
2279 rtd
->ops
.ack
= platform
->driver
->ops
->ack
;
2280 rtd
->ops
.copy
= platform
->driver
->ops
->copy
;
2281 rtd
->ops
.silence
= platform
->driver
->ops
->silence
;
2282 rtd
->ops
.page
= platform
->driver
->ops
->page
;
2283 rtd
->ops
.mmap
= platform
->driver
->ops
->mmap
;
2287 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &rtd
->ops
);
2290 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &rtd
->ops
);
2292 if (platform
->driver
->pcm_new
) {
2293 ret
= platform
->driver
->pcm_new(rtd
);
2295 dev_err(platform
->dev
,
2296 "ASoC: pcm constructor failed: %d\n",
2302 pcm
->private_free
= platform
->driver
->pcm_free
;
2304 dev_info(rtd
->card
->dev
, "%s <-> %s mapping ok\n", codec_dai
->name
,
2309 /* is the current PCM operation for this FE ? */
2310 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime
*fe
, int stream
)
2312 if (fe
->dpcm
[stream
].runtime_update
== SND_SOC_DPCM_UPDATE_FE
)
2316 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update
);
2318 /* is the current PCM operation for this BE ? */
2319 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime
*fe
,
2320 struct snd_soc_pcm_runtime
*be
, int stream
)
2322 if ((fe
->dpcm
[stream
].runtime_update
== SND_SOC_DPCM_UPDATE_FE
) ||
2323 ((fe
->dpcm
[stream
].runtime_update
== SND_SOC_DPCM_UPDATE_BE
) &&
2324 be
->dpcm
[stream
].runtime_update
))
2328 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update
);
2330 /* get the substream for this BE */
2331 struct snd_pcm_substream
*
2332 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime
*be
, int stream
)
2334 return be
->pcm
->streams
[stream
].substream
;
2336 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream
);
2338 /* get the BE runtime state */
2339 enum snd_soc_dpcm_state
2340 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime
*be
, int stream
)
2342 return be
->dpcm
[stream
].state
;
2344 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state
);
2346 /* set the BE runtime state */
2347 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime
*be
,
2348 int stream
, enum snd_soc_dpcm_state state
)
2350 be
->dpcm
[stream
].state
= state
;
2352 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state
);
2355 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2356 * are not running, paused or suspended for the specified stream direction.
2358 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime
*fe
,
2359 struct snd_soc_pcm_runtime
*be
, int stream
)
2361 struct snd_soc_dpcm
*dpcm
;
2364 list_for_each_entry(dpcm
, &be
->dpcm
[stream
].fe_clients
, list_fe
) {
2369 state
= dpcm
->fe
->dpcm
[stream
].state
;
2370 if (state
== SND_SOC_DPCM_STATE_START
||
2371 state
== SND_SOC_DPCM_STATE_PAUSED
||
2372 state
== SND_SOC_DPCM_STATE_SUSPEND
)
2376 /* it's safe to free/stop this BE DAI */
2379 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop
);
2382 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2383 * running, paused or suspended for the specified stream direction.
2385 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime
*fe
,
2386 struct snd_soc_pcm_runtime
*be
, int stream
)
2388 struct snd_soc_dpcm
*dpcm
;
2391 list_for_each_entry(dpcm
, &be
->dpcm
[stream
].fe_clients
, list_fe
) {
2396 state
= dpcm
->fe
->dpcm
[stream
].state
;
2397 if (state
== SND_SOC_DPCM_STATE_START
||
2398 state
== SND_SOC_DPCM_STATE_PAUSED
||
2399 state
== SND_SOC_DPCM_STATE_SUSPEND
||
2400 state
== SND_SOC_DPCM_STATE_PREPARE
)
2404 /* it's safe to change hw_params */
2407 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params
);
2409 int snd_soc_platform_trigger(struct snd_pcm_substream
*substream
,
2410 int cmd
, struct snd_soc_platform
*platform
)
2412 if (platform
->driver
->ops
&& platform
->driver
->ops
->trigger
)
2413 return platform
->driver
->ops
->trigger(substream
, cmd
);
2416 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger
);
2418 #ifdef CONFIG_DEBUG_FS
2419 static char *dpcm_state_string(enum snd_soc_dpcm_state state
)
2422 case SND_SOC_DPCM_STATE_NEW
:
2424 case SND_SOC_DPCM_STATE_OPEN
:
2426 case SND_SOC_DPCM_STATE_HW_PARAMS
:
2428 case SND_SOC_DPCM_STATE_PREPARE
:
2430 case SND_SOC_DPCM_STATE_START
:
2432 case SND_SOC_DPCM_STATE_STOP
:
2434 case SND_SOC_DPCM_STATE_SUSPEND
:
2436 case SND_SOC_DPCM_STATE_PAUSED
:
2438 case SND_SOC_DPCM_STATE_HW_FREE
:
2440 case SND_SOC_DPCM_STATE_CLOSE
:
2447 static ssize_t
dpcm_show_state(struct snd_soc_pcm_runtime
*fe
,
2448 int stream
, char *buf
, size_t size
)
2450 struct snd_pcm_hw_params
*params
= &fe
->dpcm
[stream
].hw_params
;
2451 struct snd_soc_dpcm
*dpcm
;
2455 offset
+= snprintf(buf
+ offset
, size
- offset
,
2456 "[%s - %s]\n", fe
->dai_link
->name
,
2457 stream
? "Capture" : "Playback");
2459 offset
+= snprintf(buf
+ offset
, size
- offset
, "State: %s\n",
2460 dpcm_state_string(fe
->dpcm
[stream
].state
));
2462 if ((fe
->dpcm
[stream
].state
>= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
2463 (fe
->dpcm
[stream
].state
<= SND_SOC_DPCM_STATE_STOP
))
2464 offset
+= snprintf(buf
+ offset
, size
- offset
,
2466 "Format = %s, Channels = %d, Rate = %d\n",
2467 snd_pcm_format_name(params_format(params
)),
2468 params_channels(params
),
2469 params_rate(params
));
2472 offset
+= snprintf(buf
+ offset
, size
- offset
, "Backends:\n");
2474 if (list_empty(&fe
->dpcm
[stream
].be_clients
)) {
2475 offset
+= snprintf(buf
+ offset
, size
- offset
,
2476 " No active DSP links\n");
2480 list_for_each_entry(dpcm
, &fe
->dpcm
[stream
].be_clients
, list_be
) {
2481 struct snd_soc_pcm_runtime
*be
= dpcm
->be
;
2482 params
= &dpcm
->hw_params
;
2484 offset
+= snprintf(buf
+ offset
, size
- offset
,
2485 "- %s\n", be
->dai_link
->name
);
2487 offset
+= snprintf(buf
+ offset
, size
- offset
,
2489 dpcm_state_string(be
->dpcm
[stream
].state
));
2491 if ((be
->dpcm
[stream
].state
>= SND_SOC_DPCM_STATE_HW_PARAMS
) &&
2492 (be
->dpcm
[stream
].state
<= SND_SOC_DPCM_STATE_STOP
))
2493 offset
+= snprintf(buf
+ offset
, size
- offset
,
2494 " Hardware Params: "
2495 "Format = %s, Channels = %d, Rate = %d\n",
2496 snd_pcm_format_name(params_format(params
)),
2497 params_channels(params
),
2498 params_rate(params
));
2505 static ssize_t
dpcm_state_read_file(struct file
*file
, char __user
*user_buf
,
2506 size_t count
, loff_t
*ppos
)
2508 struct snd_soc_pcm_runtime
*fe
= file
->private_data
;
2509 ssize_t out_count
= PAGE_SIZE
, offset
= 0, ret
= 0;
2512 buf
= kmalloc(out_count
, GFP_KERNEL
);
2516 if (fe
->cpu_dai
->driver
->playback
.channels_min
)
2517 offset
+= dpcm_show_state(fe
, SNDRV_PCM_STREAM_PLAYBACK
,
2518 buf
+ offset
, out_count
- offset
);
2520 if (fe
->cpu_dai
->driver
->capture
.channels_min
)
2521 offset
+= dpcm_show_state(fe
, SNDRV_PCM_STREAM_CAPTURE
,
2522 buf
+ offset
, out_count
- offset
);
2524 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, offset
);
2530 static const struct file_operations dpcm_state_fops
= {
2531 .open
= simple_open
,
2532 .read
= dpcm_state_read_file
,
2533 .llseek
= default_llseek
,
2536 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime
*rtd
)
2541 rtd
->debugfs_dpcm_root
= debugfs_create_dir(rtd
->dai_link
->name
,
2542 rtd
->card
->debugfs_card_root
);
2543 if (!rtd
->debugfs_dpcm_root
) {
2545 "ASoC: Failed to create dpcm debugfs directory %s\n",
2546 rtd
->dai_link
->name
);
2550 rtd
->debugfs_dpcm_state
= debugfs_create_file("state", 0444,
2551 rtd
->debugfs_dpcm_root
,
2552 rtd
, &dpcm_state_fops
);