- 根目录:
- sound
- soc
- soc-compress.c
/*
* soc-compress.c -- ALSA SoC Compress
*
* Copyright (C) 2012 Intel Corp.
*
* Authors: Namarta Kohli <namartax.kohli@intel.com>
* Ramesh Babu K V <ramesh.babu@linux.intel.com>
* Vinod Koul <vinod.koul@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <sound/core.h>
#include <sound/compress_params.h>
#include <sound/compress_driver.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/soc-dpcm.h>
static int soc_compr_open(struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
ret = platform->driver->compr_ops->open(cstream);
if (ret < 0) {
pr_err("compress asoc: can't open platform %s\n",
platform->component.name);
goto out;
}
}
if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
ret = rtd->dai_link->compr_ops->startup(cstream);
if (ret < 0) {
pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
goto machine_err;
}
}
snd_soc_runtime_activate(rtd, cstream->direction);
mutex_unlock(&rtd->pcm_mutex);
return 0;
machine_err:
if (platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
out:
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_open_fe(struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *fe = cstream->private_data;
struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
struct snd_soc_platform *platform = fe->platform;
struct snd_soc_dpcm *dpcm;
struct snd_soc_dapm_widget_list *list;
int stream;
int ret = 0;
if (cstream->direction == SND_COMPRESS_PLAYBACK)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
ret = platform->driver->compr_ops->open(cstream);
if (ret < 0) {
pr_err("compress asoc: can't open platform %s\n",
platform->component.name);
goto out;
}
}
if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
ret = fe->dai_link->compr_ops->startup(cstream);
if (ret < 0) {
pr_err("compress asoc: %s startup failed\n", fe->dai_link->name);
goto machine_err;
}
}
fe->dpcm[stream].runtime = fe_substream->runtime;
ret = dpcm_path_get(fe, stream, &list);
if (ret < 0)
goto fe_err;
else if (ret == 0)
dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
fe->dai_link->name, stream ? "capture" : "playback");
/* calculate valid and active FE <-> BE dpcms */
dpcm_process_paths(fe, stream, &list, 1);
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
ret = dpcm_be_dai_startup(fe, stream);
if (ret < 0) {
/* clean up all links */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
goto fe_err;
}
dpcm_clear_pending_state(fe, stream);
dpcm_path_put(&list);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
snd_soc_runtime_activate(fe, stream);
mutex_unlock(&fe->card->mutex);
return 0;
fe_err:
if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
fe->dai_link->compr_ops->shutdown(cstream);
machine_err:
if (platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
out:
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
mutex_unlock(&fe->card->mutex);
return ret;
}
/*
* Power down the audio subsystem pmdown_time msecs after close is called.
* This is to ensure there are no pops or clicks in between any music tracks
* due to DAPM power cycling.
*/
static void close_delayed_work(struct work_struct *work)
{
struct snd_soc_pcm_runtime *rtd =
container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
codec_dai->driver->playback.stream_name,
codec_dai->playback_active ? "active" : "inactive",
rtd->pop_wait ? "yes" : "no");
/* are we waiting on this codec DAI stream */
if (rtd->pop_wait == 1) {
rtd->pop_wait = 0;
snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->pcm_mutex);
}
static int soc_compr_free(struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int stream;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (cstream->direction == SND_COMPRESS_PLAYBACK)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
snd_soc_runtime_deactivate(rtd, stream);
snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
if (!cpu_dai->active)
cpu_dai->rate = 0;
if (!codec_dai->active)
codec_dai->rate = 0;
if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
rtd->dai_link->compr_ops->shutdown(cstream);
if (platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
if (cstream->direction == SND_COMPRESS_PLAYBACK) {
if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
} else {
rtd->pop_wait = 1;
queue_delayed_work(system_power_efficient_wq,
&rtd->delayed_work,
msecs_to_jiffies(rtd->pmdown_time));
}
} else {
/* capture streams can be powered down now */
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_CAPTURE,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->pcm_mutex);
return 0;
}
static int soc_compr_free_fe(struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *fe = cstream->private_data;
struct snd_soc_platform *platform = fe->platform;
struct snd_soc_dpcm *dpcm;
int stream, ret;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
if (cstream->direction == SND_COMPRESS_PLAYBACK)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
snd_soc_runtime_deactivate(fe, stream);
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
ret = dpcm_be_dai_hw_free(fe, stream);
if (ret < 0)
dev_err(fe->dev, "compressed hw_free failed %d\n", ret);
ret = dpcm_be_dai_shutdown(fe, stream);
/* mark FE's links ready to prune */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
else
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
fe->dai_link->compr_ops->shutdown(cstream);
if (platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
mutex_unlock(&fe->card->mutex);
return 0;
}
static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
ret = platform->driver->compr_ops->trigger(cstream, cmd);
if (ret < 0)
goto out;
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
break;
case SNDRV_PCM_TRIGGER_STOP:
snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
break;
}
out:
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
{
struct snd_soc_pcm_runtime *fe = cstream->private_data;
struct snd_soc_platform *platform = fe->platform;
int ret = 0, stream;
if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
cmd == SND_COMPR_TRIGGER_DRAIN) {
if (platform->driver->compr_ops &&
platform->driver->compr_ops->trigger)
return platform->driver->compr_ops->trigger(cstream,
cmd);
}
if (cstream->direction == SND_COMPRESS_PLAYBACK)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
ret = platform->driver->compr_ops->trigger(cstream, cmd);
if (ret < 0)
goto out;
}
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
ret = dpcm_be_dai_trigger(fe, stream, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
break;
}
out:
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
mutex_unlock(&fe->card->mutex);
return ret;
}
static int soc_compr_set_params(struct snd_compr_stream *cstream,
struct snd_compr_params *params)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
/* first we call set_params for the platform driver
* this should configure the soc side
* if the machine has compressed ops then we call that as well
* expectation is that platform and machine will configure everything
* for this compress path, like configuring pcm port for codec
*/
if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
ret = platform->driver->compr_ops->set_params(cstream, params);
if (ret < 0)
goto err;
}
if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
ret = rtd->dai_link->compr_ops->set_params(cstream);
if (ret < 0)
goto err;
}
if (cstream->direction == SND_COMPRESS_PLAYBACK)
snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_START);
else
snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
SND_SOC_DAPM_STREAM_START);
/* cancel any delayed stream shutdown that is pending */
rtd->pop_wait = 0;
mutex_unlock(&rtd->pcm_mutex);
cancel_delayed_work_sync(&rtd->delayed_work);
return ret;
err:
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
struct snd_compr_params *params)
{
struct snd_soc_pcm_runtime *fe = cstream->private_data;
struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
struct snd_soc_platform *platform = fe->platform;
int ret = 0, stream;
if (cstream->direction == SND_COMPRESS_PLAYBACK)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
ret = platform->driver->compr_ops->set_params(cstream, params);
if (ret < 0)
goto out;
}
if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
ret = fe->dai_link->compr_ops->set_params(cstream);
if (ret < 0)
goto out;
}
/*
* Create an empty hw_params for the BE as the machine driver must
* fix this up to match DSP decoder and ASRC configuration.
* I.e. machine driver fixup for compressed BE is mandatory.
*/
memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
sizeof(struct snd_pcm_hw_params));
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
ret = dpcm_be_dai_hw_params(fe, stream);
if (ret < 0)
goto out;
ret = dpcm_be_dai_prepare(fe, stream);
if (ret < 0)
goto out;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
else
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
out:
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
mutex_unlock(&fe->card->mutex);
return ret;
}
static int soc_compr_get_params(struct snd_compr_stream *cstream,
struct snd_codec *params)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
ret = platform->driver->compr_ops->get_params(cstream, params);
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_get_caps(struct snd_compr_stream *cstream,
struct snd_compr_caps *caps)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
ret = platform->driver->compr_ops->get_caps(cstream, caps);
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
struct snd_compr_codec_caps *codec)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
ret = platform->driver->compr_ops->ack(cstream, bytes);
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_pointer(struct snd_compr_stream *cstream,
struct snd_compr_tstamp *tstamp)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
platform->driver->compr_ops->pointer(cstream, tstamp);
mutex_unlock(&rtd->pcm_mutex);
return 0;
}
static int soc_compr_copy(struct snd_compr_stream *cstream,
char __user *buf, size_t count)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
ret = platform->driver->compr_ops->copy(cstream, buf, count);
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
struct snd_compr_metadata *metadata)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata)
ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
return ret;
}
static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
struct snd_compr_metadata *metadata)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
int ret = 0;
if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata)
ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
return ret;
}
/* ASoC Compress operations */
static struct snd_compr_ops soc_compr_ops = {
.open = soc_compr_open,
.free = soc_compr_free,
.set_params = soc_compr_set_params,
.set_metadata = soc_compr_set_metadata,
.get_metadata = soc_compr_get_metadata,
.get_params = soc_compr_get_params,
.trigger = soc_compr_trigger,
.pointer = soc_compr_pointer,
.ack = soc_compr_ack,
.get_caps = soc_compr_get_caps,
.get_codec_caps = soc_compr_get_codec_caps
};
/* ASoC Dynamic Compress operations */
static struct snd_compr_ops soc_compr_dyn_ops = {
.open = soc_compr_open_fe,
.free = soc_compr_free_fe,
.set_params = soc_compr_set_params_fe,
.get_params = soc_compr_get_params,
.set_metadata = soc_compr_set_metadata,
.get_metadata = soc_compr_get_metadata,
.trigger = soc_compr_trigger_fe,
.pointer = soc_compr_pointer,
.ack = soc_compr_ack,
.get_caps = soc_compr_get_caps,
.get_codec_caps = soc_compr_get_codec_caps
};
/* create a new compress */
int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_compr *compr;
struct snd_pcm *be_pcm;
char new_name[64];
int ret = 0, direction = 0;
if (rtd->num_codecs > 1) {
dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n");
return -EINVAL;
}
/* check client and interface hw capabilities */
snprintf(new_name, sizeof(new_name), "%s %s-%d",
rtd->dai_link->stream_name, codec_dai->name, num);
if (codec_dai->driver->playback.channels_min)
direction = SND_COMPRESS_PLAYBACK;
else if (codec_dai->driver->capture.channels_min)
direction = SND_COMPRESS_CAPTURE;
else
return -EINVAL;
compr = kzalloc(sizeof(*compr), GFP_KERNEL);
if (compr == NULL) {
snd_printk(KERN_ERR "Cannot allocate compr\n");
return -ENOMEM;
}
compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
GFP_KERNEL);
if (compr->ops == NULL) {
dev_err(rtd->card->dev, "Cannot allocate compressed ops\n");
ret = -ENOMEM;
goto compr_err;
}
if (rtd->dai_link->dynamic) {
snprintf(new_name, sizeof(new_name), "(%s)",
rtd->dai_link->stream_name);
ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
1, 0, &be_pcm);
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n",
rtd->dai_link->name);
goto compr_err;
}
rtd->pcm = be_pcm;
rtd->fe_compr = 1;
be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
} else
memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
/* Add copy callback for not memory mapped DSPs */
if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
compr->ops->copy = soc_compr_copy;
mutex_init(&compr->lock);
ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
if (ret < 0) {
pr_err("compress asoc: can't create compress for codec %s\n",
codec->component.name);
goto compr_err;
}
/* DAPM dai link stream work */
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
rtd->compr = compr;
compr->private_data = rtd;
printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,
cpu_dai->name);
return ret;
compr_err:
kfree(compr);
return ret;
}