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Merge branch 'imx/fixes' of git://git.pengutronix.de/git/imx/linux-2.6 into fixes
[deliverable/linux.git] / sound / soc / soc-pcm.c
CommitLineData
ddee627c
LG		 1/*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
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.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/delay.h>
d6652ef8 22#include <linux/pm_runtime.h>
ddee627c
LG		 23#include <linux/slab.h>
24#include <linux/workqueue.h>
01d7584c 25#include <linux/export.h>
f86dcef8 26#include <linux/debugfs.h>
ddee627c
LG		 27#include <sound/core.h>
28#include <sound/pcm.h>
29#include <sound/pcm_params.h>
30#include <sound/soc.h>
01d7584c 31#include <sound/soc-dpcm.h>
ddee627c
LG		 32#include <sound/initval.h>
33
01d7584c
LG		 34#define DPCM_MAX_BE_USERS 8
35
36/* DPCM stream event, send event to FE and all active BEs. */
37static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
38 int event)
39{
40 struct snd_soc_dpcm *dpcm;
41
42 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
43
44 struct snd_soc_pcm_runtime *be = dpcm->be;
45
46 dev_dbg(be->dev, "pm: BE %s event %d dir %d\n",
47 be->dai_link->name, event, dir);
48
49 snd_soc_dapm_stream_event(be, dir, event);
50 }
51
52 snd_soc_dapm_stream_event(fe, dir, event);
53
54 return 0;
55}
56
17841020
DA		 57static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
58 struct snd_soc_dai *soc_dai)
ddee627c
LG		 59{
60 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c
LG		 61 int ret;
62
17841020 63 if (!soc_dai->driver->symmetric_rates &&
ddee627c
LG		 64 !rtd->dai_link->symmetric_rates)
65 return 0;
66
67 /* This can happen if multiple streams are starting simultaneously -
68 * the second can need to get its constraints before the first has
69 * picked a rate. Complain and allow the application to carry on.
70 */
17841020
DA		 71 if (!soc_dai->rate) {
72 dev_warn(soc_dai->dev,
ddee627c
LG		 73 "Not enforcing symmetric_rates due to race\n");
74 return 0;
75 }
76
17841020 77 dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
ddee627c
LG		 78
79 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
80 SNDRV_PCM_HW_PARAM_RATE,
17841020 81 soc_dai->rate, soc_dai->rate);
ddee627c 82 if (ret < 0) {
17841020 83 dev_err(soc_dai->dev,
ddee627c
LG		 84 "Unable to apply rate symmetry constraint: %d\n", ret);
85 return ret;
86 }
87
88 return 0;
89}
90
58ba9b25
MB		 91/*
92 * List of sample sizes that might go over the bus for parameter
93 * application. There ought to be a wildcard sample size for things
94 * like the DAC/ADC resolution to use but there isn't right now.
95 */
96static int sample_sizes[] = {
88e33954 97 24, 32,
58ba9b25
MB		 98};
99
100static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
101 struct snd_soc_dai *dai)
102{
103 int ret, i, bits;
104
105 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
106 bits = dai->driver->playback.sig_bits;
107 else
108 bits = dai->driver->capture.sig_bits;
109
110 if (!bits)
111 return;
112
113 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
278047fd
MB		 114 if (bits >= sample_sizes[i])
115 continue;
116
117 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
118 sample_sizes[i], bits);
58ba9b25
MB		 119 if (ret != 0)
120 dev_warn(dai->dev,
121 "Failed to set MSB %d/%d: %d\n",
122 bits, sample_sizes[i], ret);
123 }
124}
125
ddee627c
LG		 126/*
127 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
128 * then initialized and any private data can be allocated. This also calls
129 * startup for the cpu DAI, platform, machine and codec DAI.
130 */
131static int soc_pcm_open(struct snd_pcm_substream *substream)
132{
133 struct snd_soc_pcm_runtime *rtd = substream->private_data;
134 struct snd_pcm_runtime *runtime = substream->runtime;
135 struct snd_soc_platform *platform = rtd->platform;
136 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
137 struct snd_soc_dai *codec_dai = rtd->codec_dai;
138 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
139 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
140 int ret = 0;
141
d6652ef8
MB		 142 pm_runtime_get_sync(cpu_dai->dev);
143 pm_runtime_get_sync(codec_dai->dev);
144 pm_runtime_get_sync(platform->dev);
145
b8c0dab9 146 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 147
148 /* startup the audio subsystem */
149 if (cpu_dai->driver->ops->startup) {
150 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
151 if (ret < 0) {
25bfe662
MB		 152 dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
153 cpu_dai->name, ret);
ddee627c
LG		 154 goto out;
155 }
156 }
157
158 if (platform->driver->ops && platform->driver->ops->open) {
159 ret = platform->driver->ops->open(substream);
160 if (ret < 0) {
25bfe662
MB		 161 dev_err(platform->dev, "can't open platform %s: %d\n",
162 platform->name, ret);
ddee627c
LG		 163 goto platform_err;
164 }
165 }
166
167 if (codec_dai->driver->ops->startup) {
168 ret = codec_dai->driver->ops->startup(substream, codec_dai);
169 if (ret < 0) {
25bfe662
MB		 170 dev_err(codec_dai->dev, "can't open codec %s: %d\n",
171 codec_dai->name, ret);
ddee627c
LG		 172 goto codec_dai_err;
173 }
174 }
175
176 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
177 ret = rtd->dai_link->ops->startup(substream);
178 if (ret < 0) {
25bfe662
MB		 179 pr_err("asoc: %s startup failed: %d\n",
180 rtd->dai_link->name, ret);
ddee627c
LG		 181 goto machine_err;
182 }
183 }
184
01d7584c
LG		 185 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
186 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
187 goto dynamic;
188
ddee627c
LG		 189 /* Check that the codec and cpu DAIs are compatible */
190 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
191 runtime->hw.rate_min =
192 max(codec_dai_drv->playback.rate_min,
193 cpu_dai_drv->playback.rate_min);
194 runtime->hw.rate_max =
195 min(codec_dai_drv->playback.rate_max,
196 cpu_dai_drv->playback.rate_max);
197 runtime->hw.channels_min =
198 max(codec_dai_drv->playback.channels_min,
199 cpu_dai_drv->playback.channels_min);
200 runtime->hw.channels_max =
201 min(codec_dai_drv->playback.channels_max,
202 cpu_dai_drv->playback.channels_max);
203 runtime->hw.formats =
204 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
205 runtime->hw.rates =
206 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
207 if (codec_dai_drv->playback.rates
208 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
209 runtime->hw.rates |= cpu_dai_drv->playback.rates;
210 if (cpu_dai_drv->playback.rates
211 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
212 runtime->hw.rates |= codec_dai_drv->playback.rates;
213 } else {
214 runtime->hw.rate_min =
215 max(codec_dai_drv->capture.rate_min,
216 cpu_dai_drv->capture.rate_min);
217 runtime->hw.rate_max =
218 min(codec_dai_drv->capture.rate_max,
219 cpu_dai_drv->capture.rate_max);
220 runtime->hw.channels_min =
221 max(codec_dai_drv->capture.channels_min,
222 cpu_dai_drv->capture.channels_min);
223 runtime->hw.channels_max =
224 min(codec_dai_drv->capture.channels_max,
225 cpu_dai_drv->capture.channels_max);
226 runtime->hw.formats =
227 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
228 runtime->hw.rates =
229 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
230 if (codec_dai_drv->capture.rates
231 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
232 runtime->hw.rates |= cpu_dai_drv->capture.rates;
233 if (cpu_dai_drv->capture.rates
234 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
235 runtime->hw.rates |= codec_dai_drv->capture.rates;
236 }
237
238 ret = -EINVAL;
239 snd_pcm_limit_hw_rates(runtime);
240 if (!runtime->hw.rates) {
241 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
242 codec_dai->name, cpu_dai->name);
243 goto config_err;
244 }
245 if (!runtime->hw.formats) {
246 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
247 codec_dai->name, cpu_dai->name);
248 goto config_err;
249 }
250 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
251 runtime->hw.channels_min > runtime->hw.channels_max) {
252 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
253 codec_dai->name, cpu_dai->name);
254 goto config_err;
255 }
256
58ba9b25
MB		 257 soc_pcm_apply_msb(substream, codec_dai);
258 soc_pcm_apply_msb(substream, cpu_dai);
259
ddee627c 260 /* Symmetry only applies if we've already got an active stream. */
17841020
DA		 261 if (cpu_dai->active) {
262 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
263 if (ret != 0)
264 goto config_err;
265 }
266
267 if (codec_dai->active) {
268 ret = soc_pcm_apply_symmetry(substream, codec_dai);
ddee627c
LG		 269 if (ret != 0)
270 goto config_err;
271 }
272
273 pr_debug("asoc: %s <-> %s info:\n",
274 codec_dai->name, cpu_dai->name);
275 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
276 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
277 runtime->hw.channels_max);
278 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
279 runtime->hw.rate_max);
280
01d7584c 281dynamic:
ddee627c
LG		 282 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
283 cpu_dai->playback_active++;
284 codec_dai->playback_active++;
285 } else {
286 cpu_dai->capture_active++;
287 codec_dai->capture_active++;
288 }
289 cpu_dai->active++;
290 codec_dai->active++;
291 rtd->codec->active++;
b8c0dab9 292 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 293 return 0;
294
295config_err:
296 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
297 rtd->dai_link->ops->shutdown(substream);
298
299machine_err:
300 if (codec_dai->driver->ops->shutdown)
301 codec_dai->driver->ops->shutdown(substream, codec_dai);
302
303codec_dai_err:
304 if (platform->driver->ops && platform->driver->ops->close)
305 platform->driver->ops->close(substream);
306
307platform_err:
308 if (cpu_dai->driver->ops->shutdown)
309 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
310out:
b8c0dab9 311 mutex_unlock(&rtd->pcm_mutex);
d6652ef8
MB		 312
313 pm_runtime_put(platform->dev);
314 pm_runtime_put(codec_dai->dev);
315 pm_runtime_put(cpu_dai->dev);
316
ddee627c
LG		 317 return ret;
318}
319
320/*
321 * Power down the audio subsystem pmdown_time msecs after close is called.
322 * This is to ensure there are no pops or clicks in between any music tracks
323 * due to DAPM power cycling.
324 */
325static void close_delayed_work(struct work_struct *work)
326{
327 struct snd_soc_pcm_runtime *rtd =
328 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
329 struct snd_soc_dai *codec_dai = rtd->codec_dai;
330
b8c0dab9 331 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 332
333 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
334 codec_dai->driver->playback.stream_name,
335 codec_dai->playback_active ? "active" : "inactive",
336 codec_dai->pop_wait ? "yes" : "no");
337
338 /* are we waiting on this codec DAI stream */
339 if (codec_dai->pop_wait == 1) {
340 codec_dai->pop_wait = 0;
7bd3a6f3 341 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
d9b0951b 342 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 343 }
344
b8c0dab9 345 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 346}
347
348/*
349 * Called by ALSA when a PCM substream is closed. Private data can be
350 * freed here. The cpu DAI, codec DAI, machine and platform are also
351 * shutdown.
352 */
91d5e6b4 353static int soc_pcm_close(struct snd_pcm_substream *substream)
ddee627c
LG		 354{
355 struct snd_soc_pcm_runtime *rtd = substream->private_data;
356 struct snd_soc_platform *platform = rtd->platform;
357 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
358 struct snd_soc_dai *codec_dai = rtd->codec_dai;
359 struct snd_soc_codec *codec = rtd->codec;
360
b8c0dab9 361 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 362
363 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
364 cpu_dai->playback_active--;
365 codec_dai->playback_active--;
366 } else {
367 cpu_dai->capture_active--;
368 codec_dai->capture_active--;
369 }
370
371 cpu_dai->active--;
372 codec_dai->active--;
373 codec->active--;
374
17841020
DA		 375 /* clear the corresponding DAIs rate when inactive */
376 if (!cpu_dai->active)
377 cpu_dai->rate = 0;
378
379 if (!codec_dai->active)
380 codec_dai->rate = 0;
25b76791 381
ddee627c
LG		 382 /* Muting the DAC suppresses artifacts caused during digital
383 * shutdown, for example from stopping clocks.
384 */
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 snd_soc_dai_digital_mute(codec_dai, 1);
387
388 if (cpu_dai->driver->ops->shutdown)
389 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
390
391 if (codec_dai->driver->ops->shutdown)
392 codec_dai->driver->ops->shutdown(substream, codec_dai);
393
394 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
395 rtd->dai_link->ops->shutdown(substream);
396
397 if (platform->driver->ops && platform->driver->ops->close)
398 platform->driver->ops->close(substream);
399 cpu_dai->runtime = NULL;
400
401 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
b5d1d036 402 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
5b6247ab 403 rtd->dai_link->ignore_pmdown_time) {
1d69c5c5
PU		 404 /* powered down playback stream now */
405 snd_soc_dapm_stream_event(rtd,
7bd3a6f3 406 SNDRV_PCM_STREAM_PLAYBACK,
7bd3a6f3 407 SND_SOC_DAPM_STREAM_STOP);
1d69c5c5
PU		 408 } else {
409 /* start delayed pop wq here for playback streams */
410 codec_dai->pop_wait = 1;
411 schedule_delayed_work(&rtd->delayed_work,
412 msecs_to_jiffies(rtd->pmdown_time));
413 }
ddee627c
LG		 414 } else {
415 /* capture streams can be powered down now */
7bd3a6f3 416 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
d9b0951b 417 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 418 }
419
b8c0dab9 420 mutex_unlock(&rtd->pcm_mutex);
d6652ef8
MB		 421
422 pm_runtime_put(platform->dev);
423 pm_runtime_put(codec_dai->dev);
424 pm_runtime_put(cpu_dai->dev);
425
ddee627c
LG		 426 return 0;
427}
428
429/*
430 * Called by ALSA when the PCM substream is prepared, can set format, sample
431 * rate, etc. This function is non atomic and can be called multiple times,
432 * it can refer to the runtime info.
433 */
434static int soc_pcm_prepare(struct snd_pcm_substream *substream)
435{
436 struct snd_soc_pcm_runtime *rtd = substream->private_data;
437 struct snd_soc_platform *platform = rtd->platform;
438 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
439 struct snd_soc_dai *codec_dai = rtd->codec_dai;
440 int ret = 0;
441
b8c0dab9 442 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 443
444 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
445 ret = rtd->dai_link->ops->prepare(substream);
446 if (ret < 0) {
25bfe662 447 pr_err("asoc: machine prepare error: %d\n", ret);
ddee627c
LG		 448 goto out;
449 }
450 }
451
452 if (platform->driver->ops && platform->driver->ops->prepare) {
453 ret = platform->driver->ops->prepare(substream);
454 if (ret < 0) {
25bfe662
MB		 455 dev_err(platform->dev, "platform prepare error: %d\n",
456 ret);
ddee627c
LG		 457 goto out;
458 }
459 }
460
461 if (codec_dai->driver->ops->prepare) {
462 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
463 if (ret < 0) {
25bfe662
MB		 464 dev_err(codec_dai->dev, "DAI prepare error: %d\n",
465 ret);
ddee627c
LG		 466 goto out;
467 }
468 }
469
470 if (cpu_dai->driver->ops->prepare) {
471 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
472 if (ret < 0) {
25bfe662
MB		 473 dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
474 ret);
ddee627c
LG		 475 goto out;
476 }
477 }
478
479 /* cancel any delayed stream shutdown that is pending */
480 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
481 codec_dai->pop_wait) {
482 codec_dai->pop_wait = 0;
483 cancel_delayed_work(&rtd->delayed_work);
484 }
485
d9b0951b
LG		 486 snd_soc_dapm_stream_event(rtd, substream->stream,
487 SND_SOC_DAPM_STREAM_START);
ddee627c
LG		 488
489 snd_soc_dai_digital_mute(codec_dai, 0);
490
491out:
b8c0dab9 492 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 493 return ret;
494}
495
496/*
497 * Called by ALSA when the hardware params are set by application. This
498 * function can also be called multiple times and can allocate buffers
499 * (using snd_pcm_lib_* ). It's non-atomic.
500 */
501static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
502 struct snd_pcm_hw_params *params)
503{
504 struct snd_soc_pcm_runtime *rtd = substream->private_data;
505 struct snd_soc_platform *platform = rtd->platform;
506 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
507 struct snd_soc_dai *codec_dai = rtd->codec_dai;
508 int ret = 0;
509
b8c0dab9 510 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 511
512 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
513 ret = rtd->dai_link->ops->hw_params(substream, params);
514 if (ret < 0) {
25bfe662 515 pr_err("asoc: machine hw_params failed: %d\n", ret);
ddee627c
LG		 516 goto out;
517 }
518 }
519
520 if (codec_dai->driver->ops->hw_params) {
521 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
522 if (ret < 0) {
25bfe662
MB		 523 dev_err(codec_dai->dev, "can't set %s hw params: %d\n",
524 codec_dai->name, ret);
ddee627c
LG		 525 goto codec_err;
526 }
527 }
528
529 if (cpu_dai->driver->ops->hw_params) {
530 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
531 if (ret < 0) {
25bfe662
MB		 532 dev_err(cpu_dai->dev, "%s hw params failed: %d\n",
533 cpu_dai->name, ret);
ddee627c
LG		 534 goto interface_err;
535 }
536 }
537
538 if (platform->driver->ops && platform->driver->ops->hw_params) {
539 ret = platform->driver->ops->hw_params(substream, params);
540 if (ret < 0) {
25bfe662
MB		 541 dev_err(platform->dev, "%s hw params failed: %d\n",
542 platform->name, ret);
ddee627c
LG		 543 goto platform_err;
544 }
545 }
546
17841020
DA		 547 /* store the rate for each DAIs */
548 cpu_dai->rate = params_rate(params);
549 codec_dai->rate = params_rate(params);
ddee627c
LG		 550
551out:
b8c0dab9 552 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 553 return ret;
554
555platform_err:
556 if (cpu_dai->driver->ops->hw_free)
557 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
558
559interface_err:
560 if (codec_dai->driver->ops->hw_free)
561 codec_dai->driver->ops->hw_free(substream, codec_dai);
562
563codec_err:
564 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
565 rtd->dai_link->ops->hw_free(substream);
566
b8c0dab9 567 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 568 return ret;
569}
570
571/*
572 * Frees resources allocated by hw_params, can be called multiple times
573 */
574static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
575{
576 struct snd_soc_pcm_runtime *rtd = substream->private_data;
577 struct snd_soc_platform *platform = rtd->platform;
578 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
579 struct snd_soc_dai *codec_dai = rtd->codec_dai;
580 struct snd_soc_codec *codec = rtd->codec;
581
b8c0dab9 582 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 583
584 /* apply codec digital mute */
585 if (!codec->active)
586 snd_soc_dai_digital_mute(codec_dai, 1);
587
588 /* free any machine hw params */
589 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
590 rtd->dai_link->ops->hw_free(substream);
591
592 /* free any DMA resources */
593 if (platform->driver->ops && platform->driver->ops->hw_free)
594 platform->driver->ops->hw_free(substream);
595
596 /* now free hw params for the DAIs */
597 if (codec_dai->driver->ops->hw_free)
598 codec_dai->driver->ops->hw_free(substream, codec_dai);
599
600 if (cpu_dai->driver->ops->hw_free)
601 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
602
b8c0dab9 603 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 604 return 0;
605}
606
607static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
608{
609 struct snd_soc_pcm_runtime *rtd = substream->private_data;
610 struct snd_soc_platform *platform = rtd->platform;
611 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
612 struct snd_soc_dai *codec_dai = rtd->codec_dai;
613 int ret;
614
615 if (codec_dai->driver->ops->trigger) {
616 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
617 if (ret < 0)
618 return ret;
619 }
620
621 if (platform->driver->ops && platform->driver->ops->trigger) {
622 ret = platform->driver->ops->trigger(substream, cmd);
623 if (ret < 0)
624 return ret;
625 }
626
627 if (cpu_dai->driver->ops->trigger) {
628 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
629 if (ret < 0)
630 return ret;
631 }
632 return 0;
633}
634
45c0a188
MB		 635static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
636 int cmd)
07bf84aa
LG		 637{
638 struct snd_soc_pcm_runtime *rtd = substream->private_data;
639 struct snd_soc_platform *platform = rtd->platform;
640 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
641 struct snd_soc_dai *codec_dai = rtd->codec_dai;
642 int ret;
643
644 if (codec_dai->driver->ops->bespoke_trigger) {
645 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
646 if (ret < 0)
647 return ret;
648 }
649
650 if (platform->driver->bespoke_trigger) {
651 ret = platform->driver->bespoke_trigger(substream, cmd);
652 if (ret < 0)
653 return ret;
654 }
655
656 if (cpu_dai->driver->ops->bespoke_trigger) {
657 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
658 if (ret < 0)
659 return ret;
660 }
661 return 0;
662}
ddee627c
LG		 663/*
664 * soc level wrapper for pointer callback
665 * If cpu_dai, codec_dai, platform driver has the delay callback, than
666 * the runtime->delay will be updated accordingly.
667 */
668static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
669{
670 struct snd_soc_pcm_runtime *rtd = substream->private_data;
671 struct snd_soc_platform *platform = rtd->platform;
672 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
673 struct snd_soc_dai *codec_dai = rtd->codec_dai;
674 struct snd_pcm_runtime *runtime = substream->runtime;
675 snd_pcm_uframes_t offset = 0;
676 snd_pcm_sframes_t delay = 0;
677
678 if (platform->driver->ops && platform->driver->ops->pointer)
679 offset = platform->driver->ops->pointer(substream);
680
681 if (cpu_dai->driver->ops->delay)
682 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
683
684 if (codec_dai->driver->ops->delay)
685 delay += codec_dai->driver->ops->delay(substream, codec_dai);
686
687 if (platform->driver->delay)
688 delay += platform->driver->delay(substream, codec_dai);
689
690 runtime->delay = delay;
691
692 return offset;
693}
694
01d7584c
LG		 695/* connect a FE and BE */
696static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
697 struct snd_soc_pcm_runtime *be, int stream)
698{
699 struct snd_soc_dpcm *dpcm;
700
701 /* only add new dpcms */
702 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
703 if (dpcm->be == be && dpcm->fe == fe)
704 return 0;
705 }
706
707 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
708 if (!dpcm)
709 return -ENOMEM;
710
711 dpcm->be = be;
712 dpcm->fe = fe;
713 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
714 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
715 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
716 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
717
718 dev_dbg(fe->dev, " connected new DPCM %s path %s %s %s\n",
719 stream ? "capture" : "playback", fe->dai_link->name,
720 stream ? "<-" : "->", be->dai_link->name);
721
f86dcef8
LG		 722#ifdef CONFIG_DEBUG_FS
723 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
724 fe->debugfs_dpcm_root, &dpcm->state);
725#endif
01d7584c
LG		 726 return 1;
727}
728
729/* reparent a BE onto another FE */
730static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
731 struct snd_soc_pcm_runtime *be, int stream)
732{
733 struct snd_soc_dpcm *dpcm;
734 struct snd_pcm_substream *fe_substream, *be_substream;
735
736 /* reparent if BE is connected to other FEs */
737 if (!be->dpcm[stream].users)
738 return;
739
740 be_substream = snd_soc_dpcm_get_substream(be, stream);
741
742 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
743 if (dpcm->fe == fe)
744 continue;
745
746 dev_dbg(fe->dev, " reparent %s path %s %s %s\n",
747 stream ? "capture" : "playback",
748 dpcm->fe->dai_link->name,
749 stream ? "<-" : "->", dpcm->be->dai_link->name);
750
751 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
752 be_substream->runtime = fe_substream->runtime;
753 break;
754 }
755}
756
757/* disconnect a BE and FE */
758static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
759{
760 struct snd_soc_dpcm *dpcm, *d;
761
762 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
763 dev_dbg(fe->dev, "BE %s disconnect check for %s\n",
764 stream ? "capture" : "playback",
765 dpcm->be->dai_link->name);
766
767 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
768 continue;
769
770 dev_dbg(fe->dev, " freed DSP %s path %s %s %s\n",
771 stream ? "capture" : "playback", fe->dai_link->name,
772 stream ? "<-" : "->", dpcm->be->dai_link->name);
773
774 /* BEs still alive need new FE */
775 dpcm_be_reparent(fe, dpcm->be, stream);
776
f86dcef8
LG		 777#ifdef CONFIG_DEBUG_FS
778 debugfs_remove(dpcm->debugfs_state);
779#endif
01d7584c
LG		 780 list_del(&dpcm->list_be);
781 list_del(&dpcm->list_fe);
782 kfree(dpcm);
783 }
784}
785
786/* get BE for DAI widget and stream */
787static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
788 struct snd_soc_dapm_widget *widget, int stream)
789{
790 struct snd_soc_pcm_runtime *be;
791 int i;
792
793 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
794 for (i = 0; i < card->num_links; i++) {
795 be = &card->rtd[i];
796
797 if (be->cpu_dai->playback_widget == widget ||
798 be->codec_dai->playback_widget == widget)
799 return be;
800 }
801 } else {
802
803 for (i = 0; i < card->num_links; i++) {
804 be = &card->rtd[i];
805
806 if (be->cpu_dai->capture_widget == widget ||
807 be->codec_dai->capture_widget == widget)
808 return be;
809 }
810 }
811
812 dev_err(card->dev, "can't get %s BE for %s\n",
813 stream ? "capture" : "playback", widget->name);
814 return NULL;
815}
816
817static inline struct snd_soc_dapm_widget *
818 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
819{
820 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
821 return rtd->cpu_dai->playback_widget;
822 else
823 return rtd->cpu_dai->capture_widget;
824}
825
826static inline struct snd_soc_dapm_widget *
827 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
828{
829 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
830 return rtd->codec_dai->playback_widget;
831 else
832 return rtd->codec_dai->capture_widget;
833}
834
835static int widget_in_list(struct snd_soc_dapm_widget_list *list,
836 struct snd_soc_dapm_widget *widget)
837{
838 int i;
839
840 for (i = 0; i < list->num_widgets; i++) {
841 if (widget == list->widgets[i])
842 return 1;
843 }
844
845 return 0;
846}
847
848static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
849 int stream, struct snd_soc_dapm_widget_list **list_)
850{
851 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
852 struct snd_soc_dapm_widget_list *list;
853 int paths;
854
855 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
856 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
857 if (list == NULL)
858 return -ENOMEM;
859
860 /* get number of valid DAI paths and their widgets */
861 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
862
863 dev_dbg(fe->dev, "found %d audio %s paths\n", paths,
864 stream ? "capture" : "playback");
865
866 *list_ = list;
867 return paths;
868}
869
870static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
871{
872 kfree(*list);
873}
874
875static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
876 struct snd_soc_dapm_widget_list **list_)
877{
878 struct snd_soc_dpcm *dpcm;
879 struct snd_soc_dapm_widget_list *list = *list_;
880 struct snd_soc_dapm_widget *widget;
881 int prune = 0;
882
883 /* Destroy any old FE <--> BE connections */
884 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
885
886 /* is there a valid CPU DAI widget for this BE */
887 widget = rtd_get_cpu_widget(dpcm->be, stream);
888
889 /* prune the BE if it's no longer in our active list */
890 if (widget && widget_in_list(list, widget))
891 continue;
892
893 /* is there a valid CODEC DAI widget for this BE */
894 widget = rtd_get_codec_widget(dpcm->be, stream);
895
896 /* prune the BE if it's no longer in our active list */
897 if (widget && widget_in_list(list, widget))
898 continue;
899
900 dev_dbg(fe->dev, "pruning %s BE %s for %s\n",
901 stream ? "capture" : "playback",
902 dpcm->be->dai_link->name, fe->dai_link->name);
903 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
904 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
905 prune++;
906 }
907
908 dev_dbg(fe->dev, "found %d old BE paths for pruning\n", prune);
909 return prune;
910}
911
912static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
913 struct snd_soc_dapm_widget_list **list_)
914{
915 struct snd_soc_card *card = fe->card;
916 struct snd_soc_dapm_widget_list *list = *list_;
917 struct snd_soc_pcm_runtime *be;
918 int i, new = 0, err;
919
920 /* Create any new FE <--> BE connections */
921 for (i = 0; i < list->num_widgets; i++) {
922
923 if (list->widgets[i]->id != snd_soc_dapm_dai)
924 continue;
925
926 /* is there a valid BE rtd for this widget */
927 be = dpcm_get_be(card, list->widgets[i], stream);
928 if (!be) {
929 dev_err(fe->dev, "no BE found for %s\n",
930 list->widgets[i]->name);
931 continue;
932 }
933
934 /* make sure BE is a real BE */
935 if (!be->dai_link->no_pcm)
936 continue;
937
938 /* don't connect if FE is not running */
939 if (!fe->dpcm[stream].runtime)
940 continue;
941
942 /* newly connected FE and BE */
943 err = dpcm_be_connect(fe, be, stream);
944 if (err < 0) {
945 dev_err(fe->dev, "can't connect %s\n",
946 list->widgets[i]->name);
947 break;
948 } else if (err == 0) /* already connected */
949 continue;
950
951 /* new */
952 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
953 new++;
954 }
955
956 dev_dbg(fe->dev, "found %d new BE paths\n", new);
957 return new;
958}
959
960/*
961 * Find the corresponding BE DAIs that source or sink audio to this
962 * FE substream.
963 */
964static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
965 int stream, struct snd_soc_dapm_widget_list **list, int new)
966{
967 if (new)
968 return dpcm_add_paths(fe, stream, list);
969 else
970 return dpcm_prune_paths(fe, stream, list);
971}
972
973static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
974{
975 struct snd_soc_dpcm *dpcm;
976
977 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
978 dpcm->be->dpcm[stream].runtime_update =
979 SND_SOC_DPCM_UPDATE_NO;
980}
981
982static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
983 int stream)
984{
985 struct snd_soc_dpcm *dpcm;
986
987 /* disable any enabled and non active backends */
988 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
989
990 struct snd_soc_pcm_runtime *be = dpcm->be;
991 struct snd_pcm_substream *be_substream =
992 snd_soc_dpcm_get_substream(be, stream);
993
994 if (be->dpcm[stream].users == 0)
995 dev_err(be->dev, "no users %s at close - state %d\n",
996 stream ? "capture" : "playback",
997 be->dpcm[stream].state);
998
999 if (--be->dpcm[stream].users != 0)
1000 continue;
1001
1002 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1003 continue;
1004
1005 soc_pcm_close(be_substream);
1006 be_substream->runtime = NULL;
1007 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1008 }
1009}
1010
1011static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1012{
1013 struct snd_soc_dpcm *dpcm;
1014 int err, count = 0;
1015
1016 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1017 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1018
1019 struct snd_soc_pcm_runtime *be = dpcm->be;
1020 struct snd_pcm_substream *be_substream =
1021 snd_soc_dpcm_get_substream(be, stream);
1022
1023 /* is this op for this BE ? */
1024 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1025 continue;
1026
1027 /* first time the dpcm is open ? */
1028 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1029 dev_err(be->dev, "too many users %s at open %d\n",
1030 stream ? "capture" : "playback",
1031 be->dpcm[stream].state);
1032
1033 if (be->dpcm[stream].users++ != 0)
1034 continue;
1035
1036 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1037 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1038 continue;
1039
1040 dev_dbg(be->dev, "dpcm: open BE %s\n", be->dai_link->name);
1041
1042 be_substream->runtime = be->dpcm[stream].runtime;
1043 err = soc_pcm_open(be_substream);
1044 if (err < 0) {
1045 dev_err(be->dev, "BE open failed %d\n", err);
1046 be->dpcm[stream].users--;
1047 if (be->dpcm[stream].users < 0)
1048 dev_err(be->dev, "no users %s at unwind %d\n",
1049 stream ? "capture" : "playback",
1050 be->dpcm[stream].state);
1051
1052 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1053 goto unwind;
1054 }
1055
1056 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1057 count++;
1058 }
1059
1060 return count;
1061
1062unwind:
1063 /* disable any enabled and non active backends */
1064 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1065 struct snd_soc_pcm_runtime *be = dpcm->be;
1066 struct snd_pcm_substream *be_substream =
1067 snd_soc_dpcm_get_substream(be, stream);
1068
1069 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1070 continue;
1071
1072 if (be->dpcm[stream].users == 0)
1073 dev_err(be->dev, "no users %s at close %d\n",
1074 stream ? "capture" : "playback",
1075 be->dpcm[stream].state);
1076
1077 if (--be->dpcm[stream].users != 0)
1078 continue;
1079
1080 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1081 continue;
1082
1083 soc_pcm_close(be_substream);
1084 be_substream->runtime = NULL;
1085 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1086 }
1087
1088 return err;
1089}
1090
45c0a188 1091static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
01d7584c
LG		 1092{
1093 struct snd_pcm_runtime *runtime = substream->runtime;
1094 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1095 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1096 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1097
1098 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1099 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
1100 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
1101 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
1102 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
1103 runtime->hw.formats &= cpu_dai_drv->playback.formats;
1104 runtime->hw.rates = cpu_dai_drv->playback.rates;
1105 } else {
1106 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
1107 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
1108 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
1109 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
1110 runtime->hw.formats &= cpu_dai_drv->capture.formats;
1111 runtime->hw.rates = cpu_dai_drv->capture.rates;
1112 }
1113}
1114
1115static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1116{
1117 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1118 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1119 int stream = fe_substream->stream, ret = 0;
1120
1121 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1122
1123 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1124 if (ret < 0) {
1125 dev_err(fe->dev,"dpcm: failed to start some BEs %d\n", ret);
1126 goto be_err;
1127 }
1128
1129 dev_dbg(fe->dev, "dpcm: open FE %s\n", fe->dai_link->name);
1130
1131 /* start the DAI frontend */
1132 ret = soc_pcm_open(fe_substream);
1133 if (ret < 0) {
1134 dev_err(fe->dev,"dpcm: failed to start FE %d\n", ret);
1135 goto unwind;
1136 }
1137
1138 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1139
1140 dpcm_set_fe_runtime(fe_substream);
1141 snd_pcm_limit_hw_rates(runtime);
1142
1143 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1144 return 0;
1145
1146unwind:
1147 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1148be_err:
1149 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1150 return ret;
1151}
1152
1153static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1154{
1155 struct snd_soc_dpcm *dpcm;
1156
1157 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1158 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1159
1160 struct snd_soc_pcm_runtime *be = dpcm->be;
1161 struct snd_pcm_substream *be_substream =
1162 snd_soc_dpcm_get_substream(be, stream);
1163
1164 /* is this op for this BE ? */
1165 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1166 continue;
1167
1168 if (be->dpcm[stream].users == 0)
1169 dev_err(be->dev, "no users %s at close - state %d\n",
1170 stream ? "capture" : "playback",
1171 be->dpcm[stream].state);
1172
1173 if (--be->dpcm[stream].users != 0)
1174 continue;
1175
1176 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1177 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1178 continue;
1179
1180 dev_dbg(be->dev, "dpcm: close BE %s\n",
1181 dpcm->fe->dai_link->name);
1182
1183 soc_pcm_close(be_substream);
1184 be_substream->runtime = NULL;
1185
1186 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1187 }
1188 return 0;
1189}
1190
1191static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1192{
1193 struct snd_soc_pcm_runtime *fe = substream->private_data;
1194 int stream = substream->stream;
1195
1196 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1197
1198 /* shutdown the BEs */
1199 dpcm_be_dai_shutdown(fe, substream->stream);
1200
1201 dev_dbg(fe->dev, "dpcm: close FE %s\n", fe->dai_link->name);
1202
1203 /* now shutdown the frontend */
1204 soc_pcm_close(substream);
1205
1206 /* run the stream event for each BE */
1207 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1208
1209 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1210 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1211 return 0;
1212}
1213
1214static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1215{
1216 struct snd_soc_dpcm *dpcm;
1217
1218 /* only hw_params backends that are either sinks or sources
1219 * to this frontend DAI */
1220 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1221
1222 struct snd_soc_pcm_runtime *be = dpcm->be;
1223 struct snd_pcm_substream *be_substream =
1224 snd_soc_dpcm_get_substream(be, stream);
1225
1226 /* is this op for this BE ? */
1227 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1228 continue;
1229
1230 /* only free hw when no longer used - check all FEs */
1231 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1232 continue;
1233
1234 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1235 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1236 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1237 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1238 continue;
1239
1240 dev_dbg(be->dev, "dpcm: hw_free BE %s\n",
1241 dpcm->fe->dai_link->name);
1242
1243 soc_pcm_hw_free(be_substream);
1244
1245 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1246 }
1247
1248 return 0;
1249}
1250
45c0a188 1251static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c
LG		 1252{
1253 struct snd_soc_pcm_runtime *fe = substream->private_data;
1254 int err, stream = substream->stream;
1255
1256 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1257 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1258
1259 dev_dbg(fe->dev, "dpcm: hw_free FE %s\n", fe->dai_link->name);
1260
1261 /* call hw_free on the frontend */
1262 err = soc_pcm_hw_free(substream);
1263 if (err < 0)
1264 dev_err(fe->dev,"dpcm: hw_free FE %s failed\n",
1265 fe->dai_link->name);
1266
1267 /* only hw_params backends that are either sinks or sources
1268 * to this frontend DAI */
1269 err = dpcm_be_dai_hw_free(fe, stream);
1270
1271 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1272 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1273
1274 mutex_unlock(&fe->card->mutex);
1275 return 0;
1276}
1277
1278static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1279{
1280 struct snd_soc_dpcm *dpcm;
1281 int ret;
1282
1283 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1284
1285 struct snd_soc_pcm_runtime *be = dpcm->be;
1286 struct snd_pcm_substream *be_substream =
1287 snd_soc_dpcm_get_substream(be, stream);
1288
1289 /* is this op for this BE ? */
1290 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1291 continue;
1292
1293 /* only allow hw_params() if no connected FEs are running */
1294 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1295 continue;
1296
1297 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1298 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1299 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1300 continue;
1301
1302 dev_dbg(be->dev, "dpcm: hw_params BE %s\n",
1303 dpcm->fe->dai_link->name);
1304
1305 /* copy params for each dpcm */
1306 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1307 sizeof(struct snd_pcm_hw_params));
1308
1309 /* perform any hw_params fixups */
1310 if (be->dai_link->be_hw_params_fixup) {
1311 ret = be->dai_link->be_hw_params_fixup(be,
1312 &dpcm->hw_params);
1313 if (ret < 0) {
1314 dev_err(be->dev,
1315 "dpcm: hw_params BE fixup failed %d\n",
1316 ret);
1317 goto unwind;
1318 }
1319 }
1320
1321 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1322 if (ret < 0) {
1323 dev_err(dpcm->be->dev,
1324 "dpcm: hw_params BE failed %d\n", ret);
1325 goto unwind;
1326 }
1327
1328 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1329 }
1330 return 0;
1331
1332unwind:
1333 /* disable any enabled and non active backends */
1334 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1335 struct snd_soc_pcm_runtime *be = dpcm->be;
1336 struct snd_pcm_substream *be_substream =
1337 snd_soc_dpcm_get_substream(be, stream);
1338
1339 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1340 continue;
1341
1342 /* only allow hw_free() if no connected FEs are running */
1343 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1344 continue;
1345
1346 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1347 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1348 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1349 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1350 continue;
1351
1352 soc_pcm_hw_free(be_substream);
1353 }
1354
1355 return ret;
1356}
1357
45c0a188
MB		 1358static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1359 struct snd_pcm_hw_params *params)
01d7584c
LG		 1360{
1361 struct snd_soc_pcm_runtime *fe = substream->private_data;
1362 int ret, stream = substream->stream;
1363
1364 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1365 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1366
1367 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1368 sizeof(struct snd_pcm_hw_params));
1369 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1370 if (ret < 0) {
1371 dev_err(fe->dev,"dpcm: hw_params BE failed %d\n", ret);
1372 goto out;
1373 }
1374
1375 dev_dbg(fe->dev, "dpcm: hw_params FE %s rate %d chan %x fmt %d\n",
1376 fe->dai_link->name, params_rate(params),
1377 params_channels(params), params_format(params));
1378
1379 /* call hw_params on the frontend */
1380 ret = soc_pcm_hw_params(substream, params);
1381 if (ret < 0) {
1382 dev_err(fe->dev,"dpcm: hw_params FE failed %d\n", ret);
1383 dpcm_be_dai_hw_free(fe, stream);
1384 } else
1385 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1386
1387out:
1388 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1389 mutex_unlock(&fe->card->mutex);
1390 return ret;
1391}
1392
1393static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1394 struct snd_pcm_substream *substream, int cmd)
1395{
1396 int ret;
1397
1398 dev_dbg(dpcm->be->dev, "dpcm: trigger BE %s cmd %d\n",
1399 dpcm->fe->dai_link->name, cmd);
1400
1401 ret = soc_pcm_trigger(substream, cmd);
1402 if (ret < 0)
1403 dev_err(dpcm->be->dev,"dpcm: trigger BE failed %d\n", ret);
1404
1405 return ret;
1406}
1407
45c0a188
MB		 1408static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1409 int cmd)
01d7584c
LG		 1410{
1411 struct snd_soc_dpcm *dpcm;
1412 int ret = 0;
1413
1414 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1415
1416 struct snd_soc_pcm_runtime *be = dpcm->be;
1417 struct snd_pcm_substream *be_substream =
1418 snd_soc_dpcm_get_substream(be, stream);
1419
1420 /* is this op for this BE ? */
1421 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1422 continue;
1423
1424 switch (cmd) {
1425 case SNDRV_PCM_TRIGGER_START:
1426 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1427 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1428 continue;
1429
1430 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1431 if (ret)
1432 return ret;
1433
1434 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1435 break;
1436 case SNDRV_PCM_TRIGGER_RESUME:
1437 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1438 continue;
1439
1440 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1441 if (ret)
1442 return ret;
1443
1444 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1445 break;
1446 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1447 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1448 continue;
1449
1450 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1451 if (ret)
1452 return ret;
1453
1454 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1455 break;
1456 case SNDRV_PCM_TRIGGER_STOP:
1457 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1458 continue;
1459
1460 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1461 continue;
1462
1463 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1464 if (ret)
1465 return ret;
1466
1467 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1468 break;
1469 case SNDRV_PCM_TRIGGER_SUSPEND:
1470 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1471 continue;
1472
1473 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1474 continue;
1475
1476 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1477 if (ret)
1478 return ret;
1479
1480 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1481 break;
1482 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1483 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1484 continue;
1485
1486 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1487 continue;
1488
1489 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1490 if (ret)
1491 return ret;
1492
1493 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1494 break;
1495 }
1496 }
1497
1498 return ret;
1499}
1500EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1501
45c0a188 1502static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c
LG		 1503{
1504 struct snd_soc_pcm_runtime *fe = substream->private_data;
1505 int stream = substream->stream, ret;
1506 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1507
1508 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1509
1510 switch (trigger) {
1511 case SND_SOC_DPCM_TRIGGER_PRE:
1512 /* call trigger on the frontend before the backend. */
1513
1514 dev_dbg(fe->dev, "dpcm: pre trigger FE %s cmd %d\n",
1515 fe->dai_link->name, cmd);
1516
1517 ret = soc_pcm_trigger(substream, cmd);
1518 if (ret < 0) {
1519 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1520 goto out;
1521 }
1522
1523 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1524 break;
1525 case SND_SOC_DPCM_TRIGGER_POST:
1526 /* call trigger on the frontend after the backend. */
1527
1528 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1529 if (ret < 0) {
1530 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1531 goto out;
1532 }
1533
1534 dev_dbg(fe->dev, "dpcm: post trigger FE %s cmd %d\n",
1535 fe->dai_link->name, cmd);
1536
1537 ret = soc_pcm_trigger(substream, cmd);
1538 break;
07bf84aa
LG		 1539 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1540 /* bespoke trigger() - handles both FE and BEs */
1541
1542 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd %d\n",
1543 fe->dai_link->name, cmd);
1544
1545 ret = soc_pcm_bespoke_trigger(substream, cmd);
1546 if (ret < 0) {
1547 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1548 goto out;
1549 }
1550 break;
01d7584c
LG		 1551 default:
1552 dev_err(fe->dev, "dpcm: invalid trigger cmd %d for %s\n", cmd,
1553 fe->dai_link->name);
1554 ret = -EINVAL;
1555 goto out;
1556 }
1557
1558 switch (cmd) {
1559 case SNDRV_PCM_TRIGGER_START:
1560 case SNDRV_PCM_TRIGGER_RESUME:
1561 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1562 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1563 break;
1564 case SNDRV_PCM_TRIGGER_STOP:
1565 case SNDRV_PCM_TRIGGER_SUSPEND:
1566 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1567 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1568 break;
1569 }
1570
1571out:
1572 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1573 return ret;
1574}
1575
1576static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1577{
1578 struct snd_soc_dpcm *dpcm;
1579 int ret = 0;
1580
1581 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1582
1583 struct snd_soc_pcm_runtime *be = dpcm->be;
1584 struct snd_pcm_substream *be_substream =
1585 snd_soc_dpcm_get_substream(be, stream);
1586
1587 /* is this op for this BE ? */
1588 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1589 continue;
1590
1591 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1592 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1593 continue;
1594
1595 dev_dbg(be->dev, "dpcm: prepare BE %s\n",
1596 dpcm->fe->dai_link->name);
1597
1598 ret = soc_pcm_prepare(be_substream);
1599 if (ret < 0) {
1600 dev_err(be->dev, "dpcm: backend prepare failed %d\n",
1601 ret);
1602 break;
1603 }
1604
1605 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1606 }
1607 return ret;
1608}
1609
45c0a188 1610static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c
LG		 1611{
1612 struct snd_soc_pcm_runtime *fe = substream->private_data;
1613 int stream = substream->stream, ret = 0;
1614
1615 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1616
1617 dev_dbg(fe->dev, "dpcm: prepare FE %s\n", fe->dai_link->name);
1618
1619 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1620
1621 /* there is no point preparing this FE if there are no BEs */
1622 if (list_empty(&fe->dpcm[stream].be_clients)) {
1623 dev_err(fe->dev, "dpcm: no backend DAIs enabled for %s\n",
1624 fe->dai_link->name);
1625 ret = -EINVAL;
1626 goto out;
1627 }
1628
1629 ret = dpcm_be_dai_prepare(fe, substream->stream);
1630 if (ret < 0)
1631 goto out;
1632
1633 /* call prepare on the frontend */
1634 ret = soc_pcm_prepare(substream);
1635 if (ret < 0) {
1636 dev_err(fe->dev,"dpcm: prepare FE %s failed\n",
1637 fe->dai_link->name);
1638 goto out;
1639 }
1640
1641 /* run the stream event for each BE */
1642 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1643 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1644
1645out:
1646 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1647 mutex_unlock(&fe->card->mutex);
1648
1649 return ret;
1650}
1651
be3f3f2c
LG		 1652static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1653 unsigned int cmd, void *arg)
1654{
1655 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1656 struct snd_soc_platform *platform = rtd->platform;
1657
1658 if (platform->driver->ops->ioctl)
1659 return platform->driver->ops->ioctl(substream, cmd, arg);
1660 return snd_pcm_lib_ioctl(substream, cmd, arg);
1661}
1662
618dae11
LG		 1663static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1664{
07bf84aa
LG		 1665 struct snd_pcm_substream *substream =
1666 snd_soc_dpcm_get_substream(fe, stream);
1667 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 1668 int err;
1669
1670 dev_dbg(fe->dev, "runtime %s close on FE %s\n",
1671 stream ? "capture" : "playback", fe->dai_link->name);
1672
07bf84aa
LG		 1673 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1674 /* call bespoke trigger - FE takes care of all BE triggers */
1675 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd stop\n",
1676 fe->dai_link->name);
1677
1678 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1679 if (err < 0)
1680 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", err);
1681 } else {
1682 dev_dbg(fe->dev, "dpcm: trigger FE %s cmd stop\n",
1683 fe->dai_link->name);
1684
1685 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1686 if (err < 0)
1687 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", err);
1688 }
618dae11
LG		 1689
1690 err = dpcm_be_dai_hw_free(fe, stream);
1691 if (err < 0)
1692 dev_err(fe->dev,"dpcm: hw_free FE failed %d\n", err);
1693
1694 err = dpcm_be_dai_shutdown(fe, stream);
1695 if (err < 0)
1696 dev_err(fe->dev,"dpcm: shutdown FE failed %d\n", err);
1697
1698 /* run the stream event for each BE */
1699 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1700
1701 return 0;
1702}
1703
1704static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1705{
07bf84aa
LG		 1706 struct snd_pcm_substream *substream =
1707 snd_soc_dpcm_get_substream(fe, stream);
618dae11 1708 struct snd_soc_dpcm *dpcm;
07bf84aa 1709 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 1710 int ret;
1711
1712 dev_dbg(fe->dev, "runtime %s open on FE %s\n",
1713 stream ? "capture" : "playback", fe->dai_link->name);
1714
1715 /* Only start the BE if the FE is ready */
1716 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1717 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1718 return -EINVAL;
1719
1720 /* startup must always be called for new BEs */
1721 ret = dpcm_be_dai_startup(fe, stream);
1722 if (ret < 0) {
1723 goto disconnect;
1724 return ret;
1725 }
1726
1727 /* keep going if FE state is > open */
1728 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1729 return 0;
01d7584c 1730
618dae11
LG		 1731 ret = dpcm_be_dai_hw_params(fe, stream);
1732 if (ret < 0) {
1733 goto close;
1734 return ret;
1735 }
1736
1737 /* keep going if FE state is > hw_params */
1738 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1739 return 0;
1740
1741
1742 ret = dpcm_be_dai_prepare(fe, stream);
1743 if (ret < 0) {
1744 goto hw_free;
1745 return ret;
1746 }
1747
1748 /* run the stream event for each BE */
1749 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1750
1751 /* keep going if FE state is > prepare */
1752 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1753 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1754 return 0;
1755
07bf84aa
LG		 1756 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1757 /* call trigger on the frontend - FE takes care of all BE triggers */
1758 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd start\n",
1759 fe->dai_link->name);
618dae11 1760
07bf84aa
LG		 1761 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1762 if (ret < 0) {
1763 dev_err(fe->dev,"dpcm: bespoke trigger FE failed %d\n", ret);
1764 goto hw_free;
1765 }
1766 } else {
1767 dev_dbg(fe->dev, "dpcm: trigger FE %s cmd start\n",
1768 fe->dai_link->name);
1769
1770 ret = dpcm_be_dai_trigger(fe, stream,
1771 SNDRV_PCM_TRIGGER_START);
1772 if (ret < 0) {
1773 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1774 goto hw_free;
1775 }
618dae11
LG		 1776 }
1777
1778 return 0;
1779
1780hw_free:
1781 dpcm_be_dai_hw_free(fe, stream);
1782close:
1783 dpcm_be_dai_shutdown(fe, stream);
1784disconnect:
1785 /* disconnect any non started BEs */
1786 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1787 struct snd_soc_pcm_runtime *be = dpcm->be;
1788 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1789 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1790 }
1791
1792 return ret;
1793}
1794
1795static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1796{
1797 int ret;
1798
1799 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1800 ret = dpcm_run_update_startup(fe, stream);
1801 if (ret < 0)
1802 dev_err(fe->dev, "failed to startup some BEs\n");
1803 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1804
1805 return ret;
1806}
1807
1808static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
1809{
1810 int ret;
1811
1812 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1813 ret = dpcm_run_update_shutdown(fe, stream);
1814 if (ret < 0)
1815 dev_err(fe->dev, "failed to shutdown some BEs\n");
1816 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1817
1818 return ret;
1819}
1820
1821/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
1822 * any DAI links.
1823 */
1824int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *widget)
1825{
1826 struct snd_soc_card *card;
1827 int i, old, new, paths;
1828
1829 if (widget->codec)
1830 card = widget->codec->card;
1831 else if (widget->platform)
1832 card = widget->platform->card;
1833 else
1834 return -EINVAL;
1835
1836 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1837 for (i = 0; i < card->num_rtd; i++) {
1838 struct snd_soc_dapm_widget_list *list;
1839 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
1840
1841 /* make sure link is FE */
1842 if (!fe->dai_link->dynamic)
1843 continue;
1844
1845 /* only check active links */
1846 if (!fe->cpu_dai->active)
1847 continue;
1848
1849 /* DAPM sync will call this to update DSP paths */
1850 dev_dbg(fe->dev, "DPCM runtime update for FE %s\n",
1851 fe->dai_link->name);
1852
1853 /* skip if FE doesn't have playback capability */
1854 if (!fe->cpu_dai->driver->playback.channels_min)
1855 goto capture;
1856
1857 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
1858 if (paths < 0) {
1859 dev_warn(fe->dev, "%s no valid %s path\n",
1860 fe->dai_link->name, "playback");
1861 mutex_unlock(&card->mutex);
1862 return paths;
1863 }
1864
1865 /* update any new playback paths */
1866 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
1867 if (new) {
1868 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1869 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1870 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1871 }
1872
1873 /* update any old playback paths */
1874 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
1875 if (old) {
1876 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1877 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1878 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1879 }
1880
1881capture:
1882 /* skip if FE doesn't have capture capability */
1883 if (!fe->cpu_dai->driver->capture.channels_min)
1884 continue;
1885
1886 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
1887 if (paths < 0) {
1888 dev_warn(fe->dev, "%s no valid %s path\n",
1889 fe->dai_link->name, "capture");
1890 mutex_unlock(&card->mutex);
1891 return paths;
1892 }
1893
1894 /* update any new capture paths */
1895 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
1896 if (new) {
1897 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1898 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1899 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1900 }
1901
1902 /* update any old capture paths */
1903 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
1904 if (old) {
1905 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1906 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1907 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1908 }
1909
1910 dpcm_path_put(&list);
1911 }
1912
1913 mutex_unlock(&card->mutex);
1914 return 0;
1915}
01d7584c
LG		 1916int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
1917{
1918 struct snd_soc_dpcm *dpcm;
1919 struct list_head *clients =
1920 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
1921
1922 list_for_each_entry(dpcm, clients, list_be) {
1923
1924 struct snd_soc_pcm_runtime *be = dpcm->be;
1925 struct snd_soc_dai *dai = be->codec_dai;
1926 struct snd_soc_dai_driver *drv = dai->driver;
1927
1928 if (be->dai_link->ignore_suspend)
1929 continue;
1930
1931 dev_dbg(be->dev, "BE digital mute %s\n", be->dai_link->name);
1932
1933 if (drv->ops->digital_mute && dai->playback_active)
1934 drv->ops->digital_mute(dai, mute);
1935 }
1936
1937 return 0;
1938}
1939
45c0a188 1940static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 1941{
1942 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1943 struct snd_soc_dpcm *dpcm;
1944 struct snd_soc_dapm_widget_list *list;
1945 int ret;
1946 int stream = fe_substream->stream;
1947
1948 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1949 fe->dpcm[stream].runtime = fe_substream->runtime;
1950
1951 if (dpcm_path_get(fe, stream, &list) <= 0) {
1952 dev_warn(fe->dev, "asoc: %s no valid %s route\n",
1953 fe->dai_link->name, stream ? "capture" : "playback");
1954 mutex_unlock(&fe->card->mutex);
1955 return -EINVAL;
1956 }
1957
1958 /* calculate valid and active FE <-> BE dpcms */
1959 dpcm_process_paths(fe, stream, &list, 1);
1960
1961 ret = dpcm_fe_dai_startup(fe_substream);
1962 if (ret < 0) {
1963 /* clean up all links */
1964 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1965 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1966
1967 dpcm_be_disconnect(fe, stream);
1968 fe->dpcm[stream].runtime = NULL;
1969 }
1970
1971 dpcm_clear_pending_state(fe, stream);
1972 dpcm_path_put(&list);
1973 mutex_unlock(&fe->card->mutex);
1974 return ret;
1975}
1976
45c0a188 1977static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 1978{
1979 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1980 struct snd_soc_dpcm *dpcm;
1981 int stream = fe_substream->stream, ret;
1982
1983 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1984 ret = dpcm_fe_dai_shutdown(fe_substream);
1985
1986 /* mark FE's links ready to prune */
1987 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1988 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1989
1990 dpcm_be_disconnect(fe, stream);
1991
1992 fe->dpcm[stream].runtime = NULL;
1993 mutex_unlock(&fe->card->mutex);
1994 return ret;
1995}
1996
ddee627c
LG		 1997/* create a new pcm */
1998int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1999{
2000 struct snd_soc_codec *codec = rtd->codec;
2001 struct snd_soc_platform *platform = rtd->platform;
2002 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2003 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2004 struct snd_pcm *pcm;
2005 char new_name[64];
2006 int ret = 0, playback = 0, capture = 0;
2007
01d7584c
LG		 2008 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2009 if (cpu_dai->driver->playback.channels_min)
2010 playback = 1;
2011 if (cpu_dai->driver->capture.channels_min)
2012 capture = 1;
2013 } else {
2014 if (codec_dai->driver->playback.channels_min)
2015 playback = 1;
2016 if (codec_dai->driver->capture.channels_min)
2017 capture = 1;
2018 }
2019
2020 /* create the PCM */
2021 if (rtd->dai_link->no_pcm) {
2022 snprintf(new_name, sizeof(new_name), "(%s)",
2023 rtd->dai_link->stream_name);
2024
2025 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2026 playback, capture, &pcm);
2027 } else {
2028 if (rtd->dai_link->dynamic)
2029 snprintf(new_name, sizeof(new_name), "%s (*)",
2030 rtd->dai_link->stream_name);
2031 else
2032 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2033 rtd->dai_link->stream_name, codec_dai->name, num);
2034
2035 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2036 capture, &pcm);
2037 }
ddee627c
LG		 2038 if (ret < 0) {
2039 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2040 return ret;
2041 }
01d7584c 2042 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num, new_name);
ddee627c
LG		 2043
2044 /* DAPM dai link stream work */
2045 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2046
2047 rtd->pcm = pcm;
2048 pcm->private_data = rtd;
01d7584c
LG		 2049
2050 if (rtd->dai_link->no_pcm) {
2051 if (playback)
2052 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2053 if (capture)
2054 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2055 goto out;
2056 }
2057
2058 /* ASoC PCM operations */
2059 if (rtd->dai_link->dynamic) {
2060 rtd->ops.open = dpcm_fe_dai_open;
2061 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2062 rtd->ops.prepare = dpcm_fe_dai_prepare;
2063 rtd->ops.trigger = dpcm_fe_dai_trigger;
2064 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2065 rtd->ops.close = dpcm_fe_dai_close;
2066 rtd->ops.pointer = soc_pcm_pointer;
be3f3f2c 2067 rtd->ops.ioctl = soc_pcm_ioctl;
01d7584c
LG		 2068 } else {
2069 rtd->ops.open = soc_pcm_open;
2070 rtd->ops.hw_params = soc_pcm_hw_params;
2071 rtd->ops.prepare = soc_pcm_prepare;
2072 rtd->ops.trigger = soc_pcm_trigger;
2073 rtd->ops.hw_free = soc_pcm_hw_free;
2074 rtd->ops.close = soc_pcm_close;
2075 rtd->ops.pointer = soc_pcm_pointer;
be3f3f2c 2076 rtd->ops.ioctl = soc_pcm_ioctl;
01d7584c
LG		 2077 }
2078
ddee627c 2079 if (platform->driver->ops) {
01d7584c
LG		 2080 rtd->ops.ack = platform->driver->ops->ack;
2081 rtd->ops.copy = platform->driver->ops->copy;
2082 rtd->ops.silence = platform->driver->ops->silence;
2083 rtd->ops.page = platform->driver->ops->page;
2084 rtd->ops.mmap = platform->driver->ops->mmap;
ddee627c
LG		 2085 }
2086
2087 if (playback)
01d7584c 2088 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 2089
2090 if (capture)
01d7584c 2091 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c
LG		 2092
2093 if (platform->driver->pcm_new) {
2094 ret = platform->driver->pcm_new(rtd);
2095 if (ret < 0) {
2096 pr_err("asoc: platform pcm constructor failed\n");
2097 return ret;
2098 }
2099 }
2100
2101 pcm->private_free = platform->driver->pcm_free;
01d7584c 2102out:
ddee627c
LG		 2103 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2104 cpu_dai->name);
2105 return ret;
2106}
01d7584c
LG		 2107
2108/* is the current PCM operation for this FE ? */
2109int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2110{
2111 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2112 return 1;
2113 return 0;
2114}
2115EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2116
2117/* is the current PCM operation for this BE ? */
2118int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2119 struct snd_soc_pcm_runtime *be, int stream)
2120{
2121 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2122 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2123 be->dpcm[stream].runtime_update))
2124 return 1;
2125 return 0;
2126}
2127EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2128
2129/* get the substream for this BE */
2130struct snd_pcm_substream *
2131 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2132{
2133 return be->pcm->streams[stream].substream;
2134}
2135EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2136
2137/* get the BE runtime state */
2138enum snd_soc_dpcm_state
2139 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2140{
2141 return be->dpcm[stream].state;
2142}
2143EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2144
2145/* set the BE runtime state */
2146void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2147 int stream, enum snd_soc_dpcm_state state)
2148{
2149 be->dpcm[stream].state = state;
2150}
2151EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2152
2153/*
2154 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2155 * are not running, paused or suspended for the specified stream direction.
2156 */
2157int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2158 struct snd_soc_pcm_runtime *be, int stream)
2159{
2160 struct snd_soc_dpcm *dpcm;
2161 int state;
2162
2163 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2164
2165 if (dpcm->fe == fe)
2166 continue;
2167
2168 state = dpcm->fe->dpcm[stream].state;
2169 if (state == SND_SOC_DPCM_STATE_START ||
2170 state == SND_SOC_DPCM_STATE_PAUSED ||
2171 state == SND_SOC_DPCM_STATE_SUSPEND)
2172 return 0;
2173 }
2174
2175 /* it's safe to free/stop this BE DAI */
2176 return 1;
2177}
2178EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2179
2180/*
2181 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2182 * running, paused or suspended for the specified stream direction.
2183 */
2184int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2185 struct snd_soc_pcm_runtime *be, int stream)
2186{
2187 struct snd_soc_dpcm *dpcm;
2188 int state;
2189
2190 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2191
2192 if (dpcm->fe == fe)
2193 continue;
2194
2195 state = dpcm->fe->dpcm[stream].state;
2196 if (state == SND_SOC_DPCM_STATE_START ||
2197 state == SND_SOC_DPCM_STATE_PAUSED ||
2198 state == SND_SOC_DPCM_STATE_SUSPEND ||
2199 state == SND_SOC_DPCM_STATE_PREPARE)
2200 return 0;
2201 }
2202
2203 /* it's safe to change hw_params */
2204 return 1;
2205}
2206EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
f86dcef8 2207
07bf84aa
LG		 2208int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2209 int cmd, struct snd_soc_platform *platform)
2210{
2211 if (platform->driver->ops->trigger)
2212 return platform->driver->ops->trigger(substream, cmd);
2213 return 0;
2214}
2215EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2216
f86dcef8
LG		 2217#ifdef CONFIG_DEBUG_FS
2218static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2219{
2220 switch (state) {
2221 case SND_SOC_DPCM_STATE_NEW:
2222 return "new";
2223 case SND_SOC_DPCM_STATE_OPEN:
2224 return "open";
2225 case SND_SOC_DPCM_STATE_HW_PARAMS:
2226 return "hw_params";
2227 case SND_SOC_DPCM_STATE_PREPARE:
2228 return "prepare";
2229 case SND_SOC_DPCM_STATE_START:
2230 return "start";
2231 case SND_SOC_DPCM_STATE_STOP:
2232 return "stop";
2233 case SND_SOC_DPCM_STATE_SUSPEND:
2234 return "suspend";
2235 case SND_SOC_DPCM_STATE_PAUSED:
2236 return "paused";
2237 case SND_SOC_DPCM_STATE_HW_FREE:
2238 return "hw_free";
2239 case SND_SOC_DPCM_STATE_CLOSE:
2240 return "close";
2241 }
2242
2243 return "unknown";
2244}
2245
f86dcef8
LG		 2246static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2247 int stream, char *buf, size_t size)
2248{
2249 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2250 struct snd_soc_dpcm *dpcm;
2251 ssize_t offset = 0;
2252
2253 /* FE state */
2254 offset += snprintf(buf + offset, size - offset,
2255 "[%s - %s]\n", fe->dai_link->name,
2256 stream ? "Capture" : "Playback");
2257
2258 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2259 dpcm_state_string(fe->dpcm[stream].state));
2260
2261 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2262 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2263 offset += snprintf(buf + offset, size - offset,
2264 "Hardware Params: "
2265 "Format = %s, Channels = %d, Rate = %d\n",
2266 snd_pcm_format_name(params_format(params)),
2267 params_channels(params),
2268 params_rate(params));
2269
2270 /* BEs state */
2271 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2272
2273 if (list_empty(&fe->dpcm[stream].be_clients)) {
2274 offset += snprintf(buf + offset, size - offset,
2275 " No active DSP links\n");
2276 goto out;
2277 }
2278
2279 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2280 struct snd_soc_pcm_runtime *be = dpcm->be;
2281 params = &dpcm->hw_params;
2282
2283 offset += snprintf(buf + offset, size - offset,
2284 "- %s\n", be->dai_link->name);
2285
2286 offset += snprintf(buf + offset, size - offset,
2287 " State: %s\n",
2288 dpcm_state_string(be->dpcm[stream].state));
2289
2290 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2291 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2292 offset += snprintf(buf + offset, size - offset,
2293 " Hardware Params: "
2294 "Format = %s, Channels = %d, Rate = %d\n",
2295 snd_pcm_format_name(params_format(params)),
2296 params_channels(params),
2297 params_rate(params));
2298 }
2299
2300out:
2301 return offset;
2302}
2303
2304static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2305 size_t count, loff_t *ppos)
2306{
2307 struct snd_soc_pcm_runtime *fe = file->private_data;
2308 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2309 char *buf;
2310
2311 buf = kmalloc(out_count, GFP_KERNEL);
2312 if (!buf)
2313 return -ENOMEM;
2314
2315 if (fe->cpu_dai->driver->playback.channels_min)
2316 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2317 buf + offset, out_count - offset);
2318
2319 if (fe->cpu_dai->driver->capture.channels_min)
2320 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2321 buf + offset, out_count - offset);
2322
f57b8488 2323 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
f86dcef8 2324
f57b8488
LG		 2325 kfree(buf);
2326 return ret;
f86dcef8
LG		 2327}
2328
2329static const struct file_operations dpcm_state_fops = {
f57b8488 2330 .open = simple_open,
f86dcef8
LG		 2331 .read = dpcm_state_read_file,
2332 .llseek = default_llseek,
2333};
2334
2335int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2336{
b3bba9a1
MB		 2337 if (!rtd->dai_link)
2338 return 0;
2339
f86dcef8
LG		 2340 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2341 rtd->card->debugfs_card_root);
2342 if (!rtd->debugfs_dpcm_root) {
2343 dev_dbg(rtd->dev,
2344 "ASoC: Failed to create dpcm debugfs directory %s\n",
2345 rtd->dai_link->name);
2346 return -EINVAL;
2347 }
2348
f57b8488 2349 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
f86dcef8
LG		 2350 rtd->debugfs_dpcm_root,
2351 rtd, &dpcm_state_fops);
2352
2353 return 0;
2354}
2355#endif
Linux kernel - Deliverables
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