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-rw-r--r--sound/soc/soc-pcm.c642
1 files changed, 642 insertions, 0 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
new file mode 100644
index 00000000000..2879c883eeb
--- /dev/null
+++ b/sound/soc/soc-pcm.c
@@ -0,0 +1,642 @@
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>
22#include <linux/slab.h>
23#include <linux/workqueue.h>
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/soc.h>
28#include <sound/initval.h>
29
30static DEFINE_MUTEX(pcm_mutex);
31
32static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
33{
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
36 struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 int ret;
38
39 if (!codec_dai->driver->symmetric_rates &&
40 !cpu_dai->driver->symmetric_rates &&
41 !rtd->dai_link->symmetric_rates)
42 return 0;
43
44 /* This can happen if multiple streams are starting simultaneously -
45 * the second can need to get its constraints before the first has
46 * picked a rate. Complain and allow the application to carry on.
47 */
48 if (!rtd->rate) {
49 dev_warn(&rtd->dev,
50 "Not enforcing symmetric_rates due to race\n");
51 return 0;
52 }
53
54 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
55
56 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
57 SNDRV_PCM_HW_PARAM_RATE,
58 rtd->rate, rtd->rate);
59 if (ret < 0) {
60 dev_err(&rtd->dev,
61 "Unable to apply rate symmetry constraint: %d\n", ret);
62 return ret;
63 }
64
65 return 0;
66}
67
68/*
69 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
70 * then initialized and any private data can be allocated. This also calls
71 * startup for the cpu DAI, platform, machine and codec DAI.
72 */
73static int soc_pcm_open(struct snd_pcm_substream *substream)
74{
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct snd_pcm_runtime *runtime = substream->runtime;
77 struct snd_soc_platform *platform = rtd->platform;
78 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
79 struct snd_soc_dai *codec_dai = rtd->codec_dai;
80 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
81 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
82 int ret = 0;
83
84 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
85
86 /* startup the audio subsystem */
87 if (cpu_dai->driver->ops->startup) {
88 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
89 if (ret < 0) {
90 printk(KERN_ERR "asoc: can't open interface %s\n",
91 cpu_dai->name);
92 goto out;
93 }
94 }
95
96 if (platform->driver->ops && platform->driver->ops->open) {
97 ret = platform->driver->ops->open(substream);
98 if (ret < 0) {
99 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
100 goto platform_err;
101 }
102 }
103
104 if (codec_dai->driver->ops->startup) {
105 ret = codec_dai->driver->ops->startup(substream, codec_dai);
106 if (ret < 0) {
107 printk(KERN_ERR "asoc: can't open codec %s\n",
108 codec_dai->name);
109 goto codec_dai_err;
110 }
111 }
112
113 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
114 ret = rtd->dai_link->ops->startup(substream);
115 if (ret < 0) {
116 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
117 goto machine_err;
118 }
119 }
120
121 /* Check that the codec and cpu DAIs are compatible */
122 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
123 runtime->hw.rate_min =
124 max(codec_dai_drv->playback.rate_min,
125 cpu_dai_drv->playback.rate_min);
126 runtime->hw.rate_max =
127 min(codec_dai_drv->playback.rate_max,
128 cpu_dai_drv->playback.rate_max);
129 runtime->hw.channels_min =
130 max(codec_dai_drv->playback.channels_min,
131 cpu_dai_drv->playback.channels_min);
132 runtime->hw.channels_max =
133 min(codec_dai_drv->playback.channels_max,
134 cpu_dai_drv->playback.channels_max);
135 runtime->hw.formats =
136 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
137 runtime->hw.rates =
138 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
139 if (codec_dai_drv->playback.rates
140 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
141 runtime->hw.rates |= cpu_dai_drv->playback.rates;
142 if (cpu_dai_drv->playback.rates
143 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
144 runtime->hw.rates |= codec_dai_drv->playback.rates;
145 } else {
146 runtime->hw.rate_min =
147 max(codec_dai_drv->capture.rate_min,
148 cpu_dai_drv->capture.rate_min);
149 runtime->hw.rate_max =
150 min(codec_dai_drv->capture.rate_max,
151 cpu_dai_drv->capture.rate_max);
152 runtime->hw.channels_min =
153 max(codec_dai_drv->capture.channels_min,
154 cpu_dai_drv->capture.channels_min);
155 runtime->hw.channels_max =
156 min(codec_dai_drv->capture.channels_max,
157 cpu_dai_drv->capture.channels_max);
158 runtime->hw.formats =
159 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
160 runtime->hw.rates =
161 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
162 if (codec_dai_drv->capture.rates
163 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
164 runtime->hw.rates |= cpu_dai_drv->capture.rates;
165 if (cpu_dai_drv->capture.rates
166 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
167 runtime->hw.rates |= codec_dai_drv->capture.rates;
168 }
169
170 ret = -EINVAL;
171 snd_pcm_limit_hw_rates(runtime);
172 if (!runtime->hw.rates) {
173 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
174 codec_dai->name, cpu_dai->name);
175 goto config_err;
176 }
177 if (!runtime->hw.formats) {
178 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
179 codec_dai->name, cpu_dai->name);
180 goto config_err;
181 }
182 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
183 runtime->hw.channels_min > runtime->hw.channels_max) {
184 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
185 codec_dai->name, cpu_dai->name);
186 goto config_err;
187 }
188
189 /* Symmetry only applies if we've already got an active stream. */
190 if (cpu_dai->active || codec_dai->active) {
191 ret = soc_pcm_apply_symmetry(substream);
192 if (ret != 0)
193 goto config_err;
194 }
195
196 pr_debug("asoc: %s <-> %s info:\n",
197 codec_dai->name, cpu_dai->name);
198 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
199 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
200 runtime->hw.channels_max);
201 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
202 runtime->hw.rate_max);
203
204 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
205 cpu_dai->playback_active++;
206 codec_dai->playback_active++;
207 } else {
208 cpu_dai->capture_active++;
209 codec_dai->capture_active++;
210 }
211 cpu_dai->active++;
212 codec_dai->active++;
213 rtd->codec->active++;
214 mutex_unlock(&rtd->pcm_mutex);
215 return 0;
216
217config_err:
218 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
219 rtd->dai_link->ops->shutdown(substream);
220
221machine_err:
222 if (codec_dai->driver->ops->shutdown)
223 codec_dai->driver->ops->shutdown(substream, codec_dai);
224
225codec_dai_err:
226 if (platform->driver->ops && platform->driver->ops->close)
227 platform->driver->ops->close(substream);
228
229platform_err:
230 if (cpu_dai->driver->ops->shutdown)
231 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
232out:
233 mutex_unlock(&rtd->pcm_mutex);
234 return ret;
235}
236
237/*
238 * Power down the audio subsystem pmdown_time msecs after close is called.
239 * This is to ensure there are no pops or clicks in between any music tracks
240 * due to DAPM power cycling.
241 */
242static void close_delayed_work(struct work_struct *work)
243{
244 struct snd_soc_pcm_runtime *rtd =
245 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
246 struct snd_soc_dai *codec_dai = rtd->codec_dai;
247
248 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
249
250 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
251 codec_dai->driver->playback.stream_name,
252 codec_dai->playback_active ? "active" : "inactive",
253 codec_dai->pop_wait ? "yes" : "no");
254
255 /* are we waiting on this codec DAI stream */
256 if (codec_dai->pop_wait == 1) {
257 codec_dai->pop_wait = 0;
258 snd_soc_dapm_stream_event(rtd,
259 codec_dai->driver->playback.stream_name,
260 SND_SOC_DAPM_STREAM_STOP);
261 }
262
263 mutex_unlock(&rtd->pcm_mutex);
264}
265
266/*
267 * Called by ALSA when a PCM substream is closed. Private data can be
268 * freed here. The cpu DAI, codec DAI, machine and platform are also
269 * shutdown.
270 */
271static int soc_pcm_close(struct snd_pcm_substream *substream)
272{
273 struct snd_soc_pcm_runtime *rtd = substream->private_data;
274 struct snd_soc_platform *platform = rtd->platform;
275 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
276 struct snd_soc_dai *codec_dai = rtd->codec_dai;
277 struct snd_soc_codec *codec = rtd->codec;
278
279 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
280
281 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
282 cpu_dai->playback_active--;
283 codec_dai->playback_active--;
284 } else {
285 cpu_dai->capture_active--;
286 codec_dai->capture_active--;
287 }
288
289 cpu_dai->active--;
290 codec_dai->active--;
291 codec->active--;
292
293 if (!cpu_dai->active && !codec_dai->active)
294 rtd->rate = 0;
295
296 /* Muting the DAC suppresses artifacts caused during digital
297 * shutdown, for example from stopping clocks.
298 */
299 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
300 snd_soc_dai_digital_mute(codec_dai, 1);
301
302 if (cpu_dai->driver->ops->shutdown)
303 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
304
305 if (codec_dai->driver->ops->shutdown)
306 codec_dai->driver->ops->shutdown(substream, codec_dai);
307
308 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
309 rtd->dai_link->ops->shutdown(substream);
310
311 if (platform->driver->ops && platform->driver->ops->close)
312 platform->driver->ops->close(substream);
313 cpu_dai->runtime = NULL;
314
315 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
316 /* start delayed pop wq here for playback streams */
317 codec_dai->pop_wait = 1;
318 schedule_delayed_work(&rtd->delayed_work,
319 msecs_to_jiffies(rtd->pmdown_time));
320 } else {
321 /* capture streams can be powered down now */
322 snd_soc_dapm_stream_event(rtd,
323 codec_dai->driver->capture.stream_name,
324 SND_SOC_DAPM_STREAM_STOP);
325 }
326
327 mutex_unlock(&rtd->pcm_mutex);
328 return 0;
329}
330
331/*
332 * Called by ALSA when the PCM substream is prepared, can set format, sample
333 * rate, etc. This function is non atomic and can be called multiple times,
334 * it can refer to the runtime info.
335 */
336static int soc_pcm_prepare(struct snd_pcm_substream *substream)
337{
338 struct snd_soc_pcm_runtime *rtd = substream->private_data;
339 struct snd_soc_platform *platform = rtd->platform;
340 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
341 struct snd_soc_dai *codec_dai = rtd->codec_dai;
342 int ret = 0;
343
344 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
345
346 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
347 ret = rtd->dai_link->ops->prepare(substream);
348 if (ret < 0) {
349 printk(KERN_ERR "asoc: machine prepare error\n");
350 goto out;
351 }
352 }
353
354 if (platform->driver->ops && platform->driver->ops->prepare) {
355 ret = platform->driver->ops->prepare(substream);
356 if (ret < 0) {
357 printk(KERN_ERR "asoc: platform prepare error\n");
358 goto out;
359 }
360 }
361
362 if (codec_dai->driver->ops->prepare) {
363 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
364 if (ret < 0) {
365 printk(KERN_ERR "asoc: codec DAI prepare error\n");
366 goto out;
367 }
368 }
369
370 if (cpu_dai->driver->ops->prepare) {
371 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
372 if (ret < 0) {
373 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
374 goto out;
375 }
376 }
377
378 /* cancel any delayed stream shutdown that is pending */
379 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
380 codec_dai->pop_wait) {
381 codec_dai->pop_wait = 0;
382 cancel_delayed_work(&rtd->delayed_work);
383 }
384
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 snd_soc_dapm_stream_event(rtd,
387 codec_dai->driver->playback.stream_name,
388 SND_SOC_DAPM_STREAM_START);
389 else
390 snd_soc_dapm_stream_event(rtd,
391 codec_dai->driver->capture.stream_name,
392 SND_SOC_DAPM_STREAM_START);
393
394 snd_soc_dai_digital_mute(codec_dai, 0);
395
396out:
397 mutex_unlock(&rtd->pcm_mutex);
398 return ret;
399}
400
401/*
402 * Called by ALSA when the hardware params are set by application. This
403 * function can also be called multiple times and can allocate buffers
404 * (using snd_pcm_lib_* ). It's non-atomic.
405 */
406static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
407 struct snd_pcm_hw_params *params)
408{
409 struct snd_soc_pcm_runtime *rtd = substream->private_data;
410 struct snd_soc_platform *platform = rtd->platform;
411 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
412 struct snd_soc_dai *codec_dai = rtd->codec_dai;
413 int ret = 0;
414
415 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
416
417 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
418 ret = rtd->dai_link->ops->hw_params(substream, params);
419 if (ret < 0) {
420 printk(KERN_ERR "asoc: machine hw_params failed\n");
421 goto out;
422 }
423 }
424
425 if (codec_dai->driver->ops->hw_params) {
426 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
427 if (ret < 0) {
428 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
429 codec_dai->name);
430 goto codec_err;
431 }
432 }
433
434 if (cpu_dai->driver->ops->hw_params) {
435 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
436 if (ret < 0) {
437 printk(KERN_ERR "asoc: interface %s hw params failed\n",
438 cpu_dai->name);
439 goto interface_err;
440 }
441 }
442
443 if (platform->driver->ops && platform->driver->ops->hw_params) {
444 ret = platform->driver->ops->hw_params(substream, params);
445 if (ret < 0) {
446 printk(KERN_ERR "asoc: platform %s hw params failed\n",
447 platform->name);
448 goto platform_err;
449 }
450 }
451
452 rtd->rate = params_rate(params);
453
454out:
455 mutex_unlock(&rtd->pcm_mutex);
456 return ret;
457
458platform_err:
459 if (cpu_dai->driver->ops->hw_free)
460 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
461
462interface_err:
463 if (codec_dai->driver->ops->hw_free)
464 codec_dai->driver->ops->hw_free(substream, codec_dai);
465
466codec_err:
467 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
468 rtd->dai_link->ops->hw_free(substream);
469
470 mutex_unlock(&rtd->pcm_mutex);
471 return ret;
472}
473
474/*
475 * Frees resources allocated by hw_params, can be called multiple times
476 */
477static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
478{
479 struct snd_soc_pcm_runtime *rtd = substream->private_data;
480 struct snd_soc_platform *platform = rtd->platform;
481 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
482 struct snd_soc_dai *codec_dai = rtd->codec_dai;
483 struct snd_soc_codec *codec = rtd->codec;
484
485 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
486
487 /* apply codec digital mute */
488 if (!codec->active)
489 snd_soc_dai_digital_mute(codec_dai, 1);
490
491 /* free any machine hw params */
492 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
493 rtd->dai_link->ops->hw_free(substream);
494
495 /* free any DMA resources */
496 if (platform->driver->ops && platform->driver->ops->hw_free)
497 platform->driver->ops->hw_free(substream);
498
499 /* now free hw params for the DAIs */
500 if (codec_dai->driver->ops->hw_free)
501 codec_dai->driver->ops->hw_free(substream, codec_dai);
502
503 if (cpu_dai->driver->ops->hw_free)
504 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
505
506 mutex_unlock(&rtd->pcm_mutex);
507 return 0;
508}
509
510static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
511{
512 struct snd_soc_pcm_runtime *rtd = substream->private_data;
513 struct snd_soc_platform *platform = rtd->platform;
514 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
515 struct snd_soc_dai *codec_dai = rtd->codec_dai;
516 int ret;
517
518 if (codec_dai->driver->ops->trigger) {
519 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
520 if (ret < 0)
521 return ret;
522 }
523
524 if (platform->driver->ops && platform->driver->ops->trigger) {
525 ret = platform->driver->ops->trigger(substream, cmd);
526 if (ret < 0)
527 return ret;
528 }
529
530 if (cpu_dai->driver->ops->trigger) {
531 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
532 if (ret < 0)
533 return ret;
534 }
535 return 0;
536}
537
538/*
539 * soc level wrapper for pointer callback
540 * If cpu_dai, codec_dai, platform driver has the delay callback, than
541 * the runtime->delay will be updated accordingly.
542 */
543static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
544{
545 struct snd_soc_pcm_runtime *rtd = substream->private_data;
546 struct snd_soc_platform *platform = rtd->platform;
547 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
548 struct snd_soc_dai *codec_dai = rtd->codec_dai;
549 struct snd_pcm_runtime *runtime = substream->runtime;
550 snd_pcm_uframes_t offset = 0;
551 snd_pcm_sframes_t delay = 0;
552
553 if (platform->driver->ops && platform->driver->ops->pointer)
554 offset = platform->driver->ops->pointer(substream);
555
556 if (cpu_dai->driver->ops->delay)
557 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
558
559 if (codec_dai->driver->ops->delay)
560 delay += codec_dai->driver->ops->delay(substream, codec_dai);
561
562 if (platform->driver->delay)
563 delay += platform->driver->delay(substream, codec_dai);
564
565 runtime->delay = delay;
566
567 return offset;
568}
569
570/* ASoC PCM operations */
571static struct snd_pcm_ops soc_pcm_ops = {
572 .open = soc_pcm_open,
573 .close = soc_pcm_close,
574 .hw_params = soc_pcm_hw_params,
575 .hw_free = soc_pcm_hw_free,
576 .prepare = soc_pcm_prepare,
577 .trigger = soc_pcm_trigger,
578 .pointer = soc_pcm_pointer,
579};
580
581/* create a new pcm */
582int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
583{
584 struct snd_soc_codec *codec = rtd->codec;
585 struct snd_soc_platform *platform = rtd->platform;
586 struct snd_soc_dai *codec_dai = rtd->codec_dai;
587 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
588 struct snd_pcm *pcm;
589 char new_name[64];
590 int ret = 0, playback = 0, capture = 0;
591
592 /* check client and interface hw capabilities */
593 snprintf(new_name, sizeof(new_name), "%s %s-%d",
594 rtd->dai_link->stream_name, codec_dai->name, num);
595
596 if (codec_dai->driver->playback.channels_min)
597 playback = 1;
598 if (codec_dai->driver->capture.channels_min)
599 capture = 1;
600
601 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
602 ret = snd_pcm_new(rtd->card->snd_card, new_name,
603 num, playback, capture, &pcm);
604 if (ret < 0) {
605 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
606 return ret;
607 }
608
609 /* DAPM dai link stream work */
610 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
611
612 rtd->pcm = pcm;
613 pcm->private_data = rtd;
614 if (platform->driver->ops) {
615 soc_pcm_ops.mmap = platform->driver->ops->mmap;
616 soc_pcm_ops.pointer = platform->driver->ops->pointer;
617 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
618 soc_pcm_ops.copy = platform->driver->ops->copy;
619 soc_pcm_ops.silence = platform->driver->ops->silence;
620 soc_pcm_ops.ack = platform->driver->ops->ack;
621 soc_pcm_ops.page = platform->driver->ops->page;
622 }
623
624 if (playback)
625 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
626
627 if (capture)
628 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
629
630 if (platform->driver->pcm_new) {
631 ret = platform->driver->pcm_new(rtd);
632 if (ret < 0) {
633 pr_err("asoc: platform pcm constructor failed\n");
634 return ret;
635 }
636 }
637
638 pcm->private_free = platform->driver->pcm_free;
639 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
640 cpu_dai->name);
641 return ret;
642}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 18:58:56 -0400