2 * soc-compress.c -- ALSA SoC Compress
4 * Copyright (C) 2012 Intel Corp.
6 * Authors: Namarta Kohli <namartax.kohli@intel.com>
7 * Ramesh Babu K V <ramesh.babu@linux.intel.com>
8 * Vinod Koul <vinod.koul@linux.intel.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/slab.h>
21 #include <linux/workqueue.h>
22 #include <sound/core.h>
23 #include <sound/compress_params.h>
24 #include <sound/compress_driver.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/soc-dpcm.h>
29 static int soc_compr_open(struct snd_compr_stream *cstream)
31 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
32 struct snd_soc_platform *platform = rtd->platform;
33 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
36 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
38 if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
39 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
41 dev_err(cpu_dai->dev, "Compress ASoC: can't open interface %s: %d\n",
47 if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
48 ret = platform->driver->compr_ops->open(cstream);
50 pr_err("compress asoc: can't open platform %s\n",
51 platform->component.name);
56 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
57 ret = rtd->dai_link->compr_ops->startup(cstream);
59 pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
64 snd_soc_runtime_activate(rtd, cstream->direction);
66 mutex_unlock(&rtd->pcm_mutex);
71 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
72 platform->driver->compr_ops->free(cstream);
74 if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
75 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
77 mutex_unlock(&rtd->pcm_mutex);
81 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
83 struct snd_soc_pcm_runtime *fe = cstream->private_data;
84 struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
85 struct snd_soc_platform *platform = fe->platform;
86 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
87 struct snd_soc_dpcm *dpcm;
88 struct snd_soc_dapm_widget_list *list;
92 if (cstream->direction == SND_COMPRESS_PLAYBACK)
93 stream = SNDRV_PCM_STREAM_PLAYBACK;
95 stream = SNDRV_PCM_STREAM_CAPTURE;
97 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
99 if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
100 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
102 dev_err(cpu_dai->dev, "Compress ASoC: can't open interface %s: %d\n",
109 if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
110 ret = platform->driver->compr_ops->open(cstream);
112 pr_err("compress asoc: can't open platform %s\n",
113 platform->component.name);
118 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
119 ret = fe->dai_link->compr_ops->startup(cstream);
121 pr_err("compress asoc: %s startup failed\n", fe->dai_link->name);
126 fe->dpcm[stream].runtime = fe_substream->runtime;
128 ret = dpcm_path_get(fe, stream, &list);
132 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
133 fe->dai_link->name, stream ? "capture" : "playback");
135 /* calculate valid and active FE <-> BE dpcms */
136 dpcm_process_paths(fe, stream, &list, 1);
138 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
140 ret = dpcm_be_dai_startup(fe, stream);
142 /* clean up all links */
143 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
144 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
146 dpcm_be_disconnect(fe, stream);
147 fe->dpcm[stream].runtime = NULL;
151 dpcm_clear_pending_state(fe, stream);
152 dpcm_path_put(&list);
154 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
155 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
157 snd_soc_runtime_activate(fe, stream);
159 mutex_unlock(&fe->card->mutex);
164 dpcm_path_put(&list);
166 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
167 fe->dai_link->compr_ops->shutdown(cstream);
169 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
170 platform->driver->compr_ops->free(cstream);
172 if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
173 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
175 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
176 mutex_unlock(&fe->card->mutex);
181 * Power down the audio subsystem pmdown_time msecs after close is called.
182 * This is to ensure there are no pops or clicks in between any music tracks
183 * due to DAPM power cycling.
185 static void close_delayed_work(struct work_struct *work)
187 struct snd_soc_pcm_runtime *rtd =
188 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
189 struct snd_soc_dai *codec_dai = rtd->codec_dai;
191 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
193 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
194 codec_dai->driver->playback.stream_name,
195 codec_dai->playback_active ? "active" : "inactive",
196 rtd->pop_wait ? "yes" : "no");
198 /* are we waiting on this codec DAI stream */
199 if (rtd->pop_wait == 1) {
201 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
202 SND_SOC_DAPM_STREAM_STOP);
205 mutex_unlock(&rtd->pcm_mutex);
208 static int soc_compr_free(struct snd_compr_stream *cstream)
210 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
211 struct snd_soc_platform *platform = rtd->platform;
212 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
213 struct snd_soc_dai *codec_dai = rtd->codec_dai;
216 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
218 if (cstream->direction == SND_COMPRESS_PLAYBACK)
219 stream = SNDRV_PCM_STREAM_PLAYBACK;
221 stream = SNDRV_PCM_STREAM_CAPTURE;
223 snd_soc_runtime_deactivate(rtd, stream);
225 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
227 if (!cpu_dai->active)
230 if (!codec_dai->active)
234 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
235 rtd->dai_link->compr_ops->shutdown(cstream);
237 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
238 platform->driver->compr_ops->free(cstream);
240 if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
241 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
243 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
244 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
245 snd_soc_dapm_stream_event(rtd,
246 SNDRV_PCM_STREAM_PLAYBACK,
247 SND_SOC_DAPM_STREAM_STOP);
250 queue_delayed_work(system_power_efficient_wq,
252 msecs_to_jiffies(rtd->pmdown_time));
255 /* capture streams can be powered down now */
256 snd_soc_dapm_stream_event(rtd,
257 SNDRV_PCM_STREAM_CAPTURE,
258 SND_SOC_DAPM_STREAM_STOP);
261 mutex_unlock(&rtd->pcm_mutex);
265 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
267 struct snd_soc_pcm_runtime *fe = cstream->private_data;
268 struct snd_soc_platform *platform = fe->platform;
269 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
270 struct snd_soc_dpcm *dpcm;
273 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
275 if (cstream->direction == SND_COMPRESS_PLAYBACK)
276 stream = SNDRV_PCM_STREAM_PLAYBACK;
278 stream = SNDRV_PCM_STREAM_CAPTURE;
280 snd_soc_runtime_deactivate(fe, stream);
282 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
284 ret = dpcm_be_dai_hw_free(fe, stream);
286 dev_err(fe->dev, "compressed hw_free failed %d\n", ret);
288 ret = dpcm_be_dai_shutdown(fe, stream);
290 /* mark FE's links ready to prune */
291 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
292 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
294 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
296 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
297 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
299 dpcm_be_disconnect(fe, stream);
301 fe->dpcm[stream].runtime = NULL;
303 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
304 fe->dai_link->compr_ops->shutdown(cstream);
306 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
307 platform->driver->compr_ops->free(cstream);
309 if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
310 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
312 mutex_unlock(&fe->card->mutex);
316 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
319 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
320 struct snd_soc_platform *platform = rtd->platform;
321 struct snd_soc_dai *codec_dai = rtd->codec_dai;
322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
325 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
327 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
328 ret = platform->driver->compr_ops->trigger(cstream, cmd);
333 if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
334 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
338 case SNDRV_PCM_TRIGGER_START:
339 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
341 case SNDRV_PCM_TRIGGER_STOP:
342 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
347 mutex_unlock(&rtd->pcm_mutex);
351 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
353 struct snd_soc_pcm_runtime *fe = cstream->private_data;
354 struct snd_soc_platform *platform = fe->platform;
355 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
358 if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
359 cmd == SND_COMPR_TRIGGER_DRAIN) {
361 if (platform->driver->compr_ops &&
362 platform->driver->compr_ops->trigger)
363 return platform->driver->compr_ops->trigger(cstream,
367 if (cstream->direction == SND_COMPRESS_PLAYBACK)
368 stream = SNDRV_PCM_STREAM_PLAYBACK;
370 stream = SNDRV_PCM_STREAM_CAPTURE;
373 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
375 if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
376 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
381 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
382 ret = platform->driver->compr_ops->trigger(cstream, cmd);
387 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
389 ret = dpcm_be_dai_trigger(fe, stream, cmd);
392 case SNDRV_PCM_TRIGGER_START:
393 case SNDRV_PCM_TRIGGER_RESUME:
394 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
395 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
397 case SNDRV_PCM_TRIGGER_STOP:
398 case SNDRV_PCM_TRIGGER_SUSPEND:
399 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
401 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
402 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
407 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
408 mutex_unlock(&fe->card->mutex);
412 static int soc_compr_set_params(struct snd_compr_stream *cstream,
413 struct snd_compr_params *params)
415 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
416 struct snd_soc_platform *platform = rtd->platform;
417 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
420 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
422 /* first we call set_params for the platform driver
423 * this should configure the soc side
424 * if the machine has compressed ops then we call that as well
425 * expectation is that platform and machine will configure everything
426 * for this compress path, like configuring pcm port for codec
428 if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
429 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
434 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
435 ret = platform->driver->compr_ops->set_params(cstream, params);
440 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
441 ret = rtd->dai_link->compr_ops->set_params(cstream);
446 if (cstream->direction == SND_COMPRESS_PLAYBACK)
447 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
448 SND_SOC_DAPM_STREAM_START);
450 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
451 SND_SOC_DAPM_STREAM_START);
453 /* cancel any delayed stream shutdown that is pending */
455 mutex_unlock(&rtd->pcm_mutex);
457 cancel_delayed_work_sync(&rtd->delayed_work);
462 mutex_unlock(&rtd->pcm_mutex);
466 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
467 struct snd_compr_params *params)
469 struct snd_soc_pcm_runtime *fe = cstream->private_data;
470 struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
471 struct snd_soc_platform *platform = fe->platform;
472 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
475 if (cstream->direction == SND_COMPRESS_PLAYBACK)
476 stream = SNDRV_PCM_STREAM_PLAYBACK;
478 stream = SNDRV_PCM_STREAM_CAPTURE;
480 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
482 if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
483 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
488 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
489 ret = platform->driver->compr_ops->set_params(cstream, params);
494 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
495 ret = fe->dai_link->compr_ops->set_params(cstream);
501 * Create an empty hw_params for the BE as the machine driver must
502 * fix this up to match DSP decoder and ASRC configuration.
503 * I.e. machine driver fixup for compressed BE is mandatory.
505 memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
506 sizeof(struct snd_pcm_hw_params));
508 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
510 ret = dpcm_be_dai_hw_params(fe, stream);
514 ret = dpcm_be_dai_prepare(fe, stream);
518 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
519 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
522 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
523 mutex_unlock(&fe->card->mutex);
527 static int soc_compr_get_params(struct snd_compr_stream *cstream,
528 struct snd_codec *params)
530 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
531 struct snd_soc_platform *platform = rtd->platform;
532 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
535 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
537 if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
538 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
543 if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
544 ret = platform->driver->compr_ops->get_params(cstream, params);
547 mutex_unlock(&rtd->pcm_mutex);
551 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
552 struct snd_compr_caps *caps)
554 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
555 struct snd_soc_platform *platform = rtd->platform;
558 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
560 if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
561 ret = platform->driver->compr_ops->get_caps(cstream, caps);
563 mutex_unlock(&rtd->pcm_mutex);
567 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
568 struct snd_compr_codec_caps *codec)
570 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
571 struct snd_soc_platform *platform = rtd->platform;
574 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
576 if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
577 ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
579 mutex_unlock(&rtd->pcm_mutex);
583 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
585 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
586 struct snd_soc_platform *platform = rtd->platform;
587 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
590 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
592 if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
593 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
598 if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
599 ret = platform->driver->compr_ops->ack(cstream, bytes);
602 mutex_unlock(&rtd->pcm_mutex);
606 static int soc_compr_pointer(struct snd_compr_stream *cstream,
607 struct snd_compr_tstamp *tstamp)
609 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
610 struct snd_soc_platform *platform = rtd->platform;
612 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
614 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
616 if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
617 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
619 if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
620 ret = platform->driver->compr_ops->pointer(cstream, tstamp);
622 mutex_unlock(&rtd->pcm_mutex);
626 static int soc_compr_copy(struct snd_compr_stream *cstream,
627 char __user *buf, size_t count)
629 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
630 struct snd_soc_platform *platform = rtd->platform;
633 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
635 if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
636 ret = platform->driver->compr_ops->copy(cstream, buf, count);
638 mutex_unlock(&rtd->pcm_mutex);
642 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
643 struct snd_compr_metadata *metadata)
645 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
646 struct snd_soc_platform *platform = rtd->platform;
647 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
650 if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
651 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
656 if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata)
657 ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
662 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
663 struct snd_compr_metadata *metadata)
665 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
666 struct snd_soc_platform *platform = rtd->platform;
667 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
670 if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
671 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
676 if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata)
677 ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
682 /* ASoC Compress operations */
683 static struct snd_compr_ops soc_compr_ops = {
684 .open = soc_compr_open,
685 .free = soc_compr_free,
686 .set_params = soc_compr_set_params,
687 .set_metadata = soc_compr_set_metadata,
688 .get_metadata = soc_compr_get_metadata,
689 .get_params = soc_compr_get_params,
690 .trigger = soc_compr_trigger,
691 .pointer = soc_compr_pointer,
692 .ack = soc_compr_ack,
693 .get_caps = soc_compr_get_caps,
694 .get_codec_caps = soc_compr_get_codec_caps
697 /* ASoC Dynamic Compress operations */
698 static struct snd_compr_ops soc_compr_dyn_ops = {
699 .open = soc_compr_open_fe,
700 .free = soc_compr_free_fe,
701 .set_params = soc_compr_set_params_fe,
702 .get_params = soc_compr_get_params,
703 .set_metadata = soc_compr_set_metadata,
704 .get_metadata = soc_compr_get_metadata,
705 .trigger = soc_compr_trigger_fe,
706 .pointer = soc_compr_pointer,
707 .ack = soc_compr_ack,
708 .get_caps = soc_compr_get_caps,
709 .get_codec_caps = soc_compr_get_codec_caps
713 * snd_soc_new_compress - create a new compress.
715 * @rtd: The runtime for which we will create compress
716 * @num: the device index number (zero based - shared with normal PCMs)
718 * Return: 0 for success, else error.
720 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
722 struct snd_soc_codec *codec = rtd->codec;
723 struct snd_soc_platform *platform = rtd->platform;
724 struct snd_soc_dai *codec_dai = rtd->codec_dai;
725 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
726 struct snd_compr *compr;
727 struct snd_pcm *be_pcm;
729 int ret = 0, direction = 0;
730 int playback = 0, capture = 0;
732 if (rtd->num_codecs > 1) {
733 dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n");
737 /* check client and interface hw capabilities */
738 snprintf(new_name, sizeof(new_name), "%s %s-%d",
739 rtd->dai_link->stream_name, codec_dai->name, num);
741 if (codec_dai->driver->playback.channels_min)
743 if (codec_dai->driver->capture.channels_min)
746 capture = capture && cpu_dai->driver->capture.channels_min;
747 playback = playback && cpu_dai->driver->playback.channels_min;
750 * Compress devices are unidirectional so only one of the directions
751 * should be set, check for that (xor)
753 if (playback + capture != 1) {
754 dev_err(rtd->card->dev, "Invalid direction for compress P %d, C %d\n",
760 direction = SND_COMPRESS_PLAYBACK;
762 direction = SND_COMPRESS_CAPTURE;
764 compr = kzalloc(sizeof(*compr), GFP_KERNEL);
766 snd_printk(KERN_ERR "Cannot allocate compr\n");
770 compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
772 if (compr->ops == NULL) {
773 dev_err(rtd->card->dev, "Cannot allocate compressed ops\n");
778 if (rtd->dai_link->dynamic) {
779 snprintf(new_name, sizeof(new_name), "(%s)",
780 rtd->dai_link->stream_name);
782 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
783 rtd->dai_link->dpcm_playback,
784 rtd->dai_link->dpcm_capture, &be_pcm);
786 dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n",
787 rtd->dai_link->name);
793 if (rtd->dai_link->dpcm_playback)
794 be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
795 else if (rtd->dai_link->dpcm_capture)
796 be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
797 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
799 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
801 /* Add copy callback for not memory mapped DSPs */
802 if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
803 compr->ops->copy = soc_compr_copy;
805 mutex_init(&compr->lock);
807 snprintf(new_name, sizeof(new_name), "%s %s-%d",
808 rtd->dai_link->stream_name,
809 rtd->codec_dai->name, num);
811 ret = snd_compress_new(rtd->card->snd_card, num, direction,
814 pr_err("compress asoc: can't create compress for codec %s\n",
815 codec->component.name);
819 /* DAPM dai link stream work */
820 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
823 compr->private_data = rtd;
825 printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,
833 EXPORT_SYMBOL_GPL(snd_soc_new_compress);