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linux-brain/sound/soc/soc-compress.c
Charles Keepax 572e6c8dd1
ASoC: compress: Only call free for components which have been opened 
The core should only call free on a component if said component has
already had open called on it. This is not presently the case and most
compressed drivers in the kernel assume it will be. This causes null
pointer dereferences in the drivers as they attempt clean up for stuff
that was never put in place.

This is fixed by aborting calling open callbacks once a failure is
encountered and then during clean up only iterating through the
component list to that point.

This is a fairly quick fix to the issue, to allow backporting. There
is more refactoring to follow to tidy the code up a little.

Fixes: 9e7e3738ab ("ASoC: snd_soc_component_driver has snd_compr_ops")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-04-26 12:23:44 +01:00

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/*
* 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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
if (ret < 0) {
dev_err(cpu_dai->dev,
"Compress ASoC: can't open interface %s: %d\n",
cpu_dai->name, ret);
goto out;
}
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->open) {
ret = platform->driver->compr_ops->open(cstream);
if (ret < 0) {
dev_err(platform->dev,
"Compress ASoC: can't open platform %s: %d\n",
platform->component.name, ret);
goto plat_err;
}
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->open)
continue;
ret = component->driver->compr_ops->open(cstream);
if (ret < 0) {
dev_err(component->dev,
"Compress ASoC: can't open platform %s: %d\n",
component->name, ret);
goto machine_err;
}
}
component = NULL;
if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
ret = rtd->dai_link->compr_ops->startup(cstream);
if (ret < 0) {
dev_err(rtd->dev,
"Compress ASoC: %s startup failed: %d\n",
rtd->dai_link->name, ret);
goto machine_err;
}
}
snd_soc_runtime_activate(rtd, cstream->direction);
mutex_unlock(&rtd->pcm_mutex);
return 0;
machine_err:
for_each_rtdcom(rtd, rtdcom) {
struct snd_soc_component *err_comp = rtdcom->component;
if (err_comp == component)
break;
/* ignore duplication for now */
if (platform && (err_comp == &platform->component))
continue;
if (!err_comp->driver->compr_ops ||
!err_comp->driver->compr_ops->free)
continue;
err_comp->driver->compr_ops->free(cstream);
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
plat_err:
if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
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[cstream->direction].substream;
struct snd_soc_platform *platform = fe->platform;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = fe->cpu_dai;
struct snd_soc_dpcm *dpcm;
struct snd_soc_dapm_widget_list *list;
int stream;
int ret;
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 (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
if (ret < 0) {
dev_err(cpu_dai->dev,
"Compress ASoC: can't open interface %s: %d\n",
cpu_dai->name, ret);
goto out;
}
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->open) {
ret = platform->driver->compr_ops->open(cstream);
if (ret < 0) {
dev_err(platform->dev,
"Compress ASoC: can't open platform %s: %d\n",
platform->component.name, ret);
goto plat_err;
}
}
for_each_rtdcom(fe, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->open)
continue;
ret = component->driver->compr_ops->open(cstream);
if (ret < 0) {
dev_err(component->dev,
"Compress ASoC: can't open platform %s: %d\n",
component->name, ret);
goto machine_err;
}
}
component = NULL;
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: %d\n",
fe->dai_link->name, ret);
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, "Compress 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 path_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;
path_err:
dpcm_path_put(&list);
fe_err:
if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
fe->dai_link->compr_ops->shutdown(cstream);
machine_err:
for_each_rtdcom(fe, rtdcom) {
struct snd_soc_component *err_comp = rtdcom->component;
if (err_comp == component)
break;
/* ignore duplication for now */
if (platform && (err_comp == &platform->component))
continue;
if (!err_comp->driver->compr_ops ||
!err_comp->driver->compr_ops->free)
continue;
err_comp->driver->compr_ops->free(cstream);
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
plat_err:
if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
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,
"Compress 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_component *component;
struct snd_soc_rtdcom_list *rtdcom;
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);
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->free)
continue;
component->driver->compr_ops->free(cstream);
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
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_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = fe->cpu_dai;
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 ASoC: 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;
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 && platform->driver->compr_ops && platform->driver->compr_ops->free)
platform->driver->compr_ops->free(cstream);
for_each_rtdcom(fe, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->free)
continue;
component->driver->compr_ops->free(cstream);
}
if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
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_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
ret = platform->driver->compr_ops->trigger(cstream, cmd);
if (ret < 0)
goto out;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->trigger)
continue;
__ret = component->driver->compr_ops->trigger(cstream, cmd);
if (__ret < 0)
ret = __ret;
}
if (ret < 0)
goto out;
if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = fe->cpu_dai;
int ret = 0, __ret, stream;
if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
cmd == SND_COMPR_TRIGGER_DRAIN) {
if (platform &&
platform->driver->compr_ops &&
platform->driver->compr_ops->trigger)
return platform->driver->compr_ops->trigger(cstream,
cmd);
for_each_rtdcom(fe, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->trigger)
continue;
__ret = component->driver->compr_ops->trigger(cstream, cmd);
if (__ret < 0)
ret = __ret;
}
return ret;
}
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 (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
if (ret < 0)
goto out;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
ret = platform->driver->compr_ops->trigger(cstream, cmd);
if (ret < 0)
goto out;
}
for_each_rtdcom(fe, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->trigger)
continue;
__ret = component->driver->compr_ops->trigger(cstream, cmd);
if (__ret < 0)
ret = __ret;
}
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
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 (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
if (ret < 0)
goto err;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
ret = platform->driver->compr_ops->set_params(cstream, params);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->set_params)
continue;
__ret = component->driver->compr_ops->set_params(cstream, params);
if (__ret < 0)
ret = __ret;
}
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[cstream->direction].substream;
struct snd_soc_platform *platform = fe->platform;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = fe->cpu_dai;
int ret = 0, __ret, 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 (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
if (ret < 0)
goto out;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
ret = platform->driver->compr_ops->set_params(cstream, params);
if (ret < 0)
goto out;
}
for_each_rtdcom(fe, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->set_params)
continue;
__ret = component->driver->compr_ops->set_params(cstream, params);
if (__ret < 0)
ret = __ret;
}
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;
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
if (ret < 0)
goto err;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->get_params) {
ret = platform->driver->compr_ops->get_params(cstream, params);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->get_params)
continue;
__ret = component->driver->compr_ops->get_params(cstream, params);
if (__ret < 0)
ret = __ret;
}
err:
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
int ret = 0, __ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->get_caps) {
ret = platform->driver->compr_ops->get_caps(cstream, caps);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->get_caps)
continue;
__ret = component->driver->compr_ops->get_caps(cstream, caps);
if (__ret < 0)
ret = __ret;
}
err:
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
int ret = 0, __ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps) {
ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->get_codec_caps)
continue;
__ret = component->driver->compr_ops->get_codec_caps(cstream, codec);
if (__ret < 0)
ret = __ret;
}
err:
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
if (ret < 0)
goto err;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->ack) {
ret = platform->driver->compr_ops->ack(cstream, bytes);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->ack)
continue;
__ret = component->driver->compr_ops->ack(cstream, bytes);
if (__ret < 0)
ret = __ret;
}
err:
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
int ret = 0, __ret;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->pointer) {
ret = platform->driver->compr_ops->pointer(cstream, tstamp);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->pointer)
continue;
__ret = component->driver->compr_ops->pointer(cstream, tstamp);
if (__ret < 0)
ret = __ret;
}
err:
mutex_unlock(&rtd->pcm_mutex);
return ret;
}
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
int ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->copy) {
ret = platform->driver->compr_ops->copy(cstream, buf, count);
if (ret < 0)
goto err;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->copy)
continue;
ret = component->driver->compr_ops->copy(cstream, buf, count);
break;
}
err:
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
if (ret < 0)
return ret;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->set_metadata) {
ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
if (ret < 0)
return ret;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->set_metadata)
continue;
__ret = component->driver->compr_ops->set_metadata(cstream, metadata);
if (__ret < 0)
ret = __ret;
}
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;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0, __ret;
if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
if (ret < 0)
return ret;
}
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->get_metadata) {
ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
if (ret < 0)
return ret;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->get_metadata)
continue;
__ret = component->driver->compr_ops->get_metadata(cstream, metadata);
if (__ret < 0)
ret = __ret;
}
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
};
/**
* snd_soc_new_compress - create a new compress.
*
* @rtd: The runtime for which we will create compress
* @num: the device index number (zero based - shared with normal PCMs)
*
* Return: 0 for success, else error.
*/
int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
{
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_component *component;
struct snd_soc_rtdcom_list *rtdcom;
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;
int playback = 0, capture = 0;
if (rtd->num_codecs > 1) {
dev_err(rtd->card->dev,
"Compress ASoC: Multicodec not supported\n");
return -EINVAL;
}
/* check client and interface hw capabilities */
if (codec_dai->driver->playback.channels_min)
playback = 1;
if (codec_dai->driver->capture.channels_min)
capture = 1;
capture = capture && cpu_dai->driver->capture.channels_min;
playback = playback && cpu_dai->driver->playback.channels_min;
/*
* Compress devices are unidirectional so only one of the directions
* should be set, check for that (xor)
*/
if (playback + capture != 1) {
dev_err(rtd->card->dev,
"Compress ASoC: Invalid direction for P %d, C %d\n",
playback, capture);
return -EINVAL;
}
if (playback)
direction = SND_COMPRESS_PLAYBACK;
else
direction = SND_COMPRESS_CAPTURE;
compr = kzalloc(sizeof(*compr), GFP_KERNEL);
if (!compr)
return -ENOMEM;
compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
GFP_KERNEL);
if (!compr->ops) {
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,
rtd->dai_link->dpcm_playback,
rtd->dai_link->dpcm_capture, &be_pcm);
if (ret < 0) {
dev_err(rtd->card->dev,
"Compress ASoC: can't create compressed for %s: %d\n",
rtd->dai_link->name, ret);
goto compr_err;
}
rtd->pcm = be_pcm;
rtd->fe_compr = 1;
if (rtd->dai_link->dpcm_playback)
be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
else if (rtd->dai_link->dpcm_capture)
be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
} else {
snprintf(new_name, sizeof(new_name), "%s %s-%d",
rtd->dai_link->stream_name, codec_dai->name, num);
memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
}
/* Add copy callback for not memory mapped DSPs */
if (platform && platform->driver->compr_ops && platform->driver->compr_ops->copy)
compr->ops->copy = soc_compr_copy;
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
/* ignore duplication for now */
if (platform && (component == &platform->component))
continue;
if (!component->driver->compr_ops ||
!component->driver->compr_ops->copy)
continue;
compr->ops->copy = soc_compr_copy;
}
mutex_init(&compr->lock);
ret = snd_compress_new(rtd->card->snd_card, num, direction,
new_name, compr);
if (ret < 0) {
component = rtd->codec_dai->component;
dev_err(component->dev,
"Compress ASoC: can't create compress for codec %s: %d\n",
component->name, ret);
goto compr_err;
}
/* DAPM dai link stream work */
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
rtd->compr = compr;
compr->private_data = rtd;
dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
codec_dai->name, cpu_dai->name);
return ret;
compr_err:
kfree(compr);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_new_compress);
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