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c9645d2a95
linux/sound/soc/soc-pcm.c
Kuninori Morimoto c9645d2a95
ASoC: soc-pcm: remove soc_dpcm_be_digital_mute() 
No one is using soc_dpcm_be_digital_mute().
If it exists only by assumption that "it may be necessary someday",
let's remove it now. Otherwise code maintenance will be difficult.
We can revive it when we really needed it.
Let's remove it, so far.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/87blpxbouc.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-02-18 23:37:01 +00:00

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// SPDX-License-Identifier: GPL-2.0+
//
// soc-pcm.c -- ALSA SoC PCM
//
// Copyright 2005 Wolfson Microelectronics PLC.
// Copyright 2005 Openedhand Ltd.
// Copyright (C) 2010 Slimlogic Ltd.
// Copyright (C) 2010 Texas Instruments Inc.
//
// Authors: Liam Girdwood <lrg@ti.com>
// Mark Brown <broonie@opensource.wolfsonmicro.com>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/export.h>
#include <linux/debugfs.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dpcm.h>
#include <sound/initval.h>
#define DPCM_MAX_BE_USERS 8
static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->startup)
return rtd->dai_link->ops->startup(substream);
return 0;
}
static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
}
static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->prepare)
return rtd->dai_link->ops->prepare(substream);
return 0;
}
static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->hw_params)
return rtd->dai_link->ops->hw_params(substream, params);
return 0;
}
static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
}
static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream,
int cmd)
{
if (rtd->dai_link->ops &&
rtd->dai_link->ops->trigger)
return rtd->dai_link->ops->trigger(substream, cmd);
return 0;
}
static inline
struct snd_soc_dapm_widget *dai_get_widget(struct snd_soc_dai *dai, int stream)
{
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
return dai->playback_widget;
else
return dai->capture_widget;
}
static void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
int stream, int action)
{
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i;
lockdep_assert_held(&rtd->card->pcm_mutex);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
cpu_dai->playback_active += action;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->playback_active += action;
} else {
cpu_dai->capture_active += action;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->capture_active += action;
}
cpu_dai->active += action;
cpu_dai->component->active += action;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
codec_dai->active += action;
codec_dai->component->active += action;
}
}
/**
* snd_soc_runtime_activate() - Increment active count for PCM runtime components
* @rtd: ASoC PCM runtime that is activated
* @stream: Direction of the PCM stream
*
* Increments the active count for all the DAIs and components attached to a PCM
* runtime. Should typically be called when a stream is opened.
*
* Must be called with the rtd->card->pcm_mutex being held
*/
void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
{
snd_soc_runtime_action(rtd, stream, 1);
}
/**
* snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
* @rtd: ASoC PCM runtime that is deactivated
* @stream: Direction of the PCM stream
*
* Decrements the active count for all the DAIs and components attached to a PCM
* runtime. Should typically be called when a stream is closed.
*
* Must be called with the rtd->card->pcm_mutex being held
*/
void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
{
snd_soc_runtime_action(rtd, stream, -1);
}
/**
* snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
* @rtd: The ASoC PCM runtime that should be checked.
*
* This function checks whether the power down delay should be ignored for a
* specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
* been configured to ignore the delay, or if none of the components benefits
* from having the delay.
*/
bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_component *component;
bool ignore = true;
int i;
if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
return true;
for_each_rtd_components(rtd, i, component)
ignore &= !component->driver->use_pmdown_time;
return ignore;
}
/**
* snd_soc_set_runtime_hwparams - set the runtime hardware parameters
* @substream: the pcm substream
* @hw: the hardware parameters
*
* Sets the substream runtime hardware parameters.
*/
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
const struct snd_pcm_hardware *hw)
{
struct snd_pcm_runtime *runtime = substream->runtime;
runtime->hw.info = hw->info;
runtime->hw.formats = hw->formats;
runtime->hw.period_bytes_min = hw->period_bytes_min;
runtime->hw.period_bytes_max = hw->period_bytes_max;
runtime->hw.periods_min = hw->periods_min;
runtime->hw.periods_max = hw->periods_max;
runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
runtime->hw.fifo_size = hw->fifo_size;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
/* DPCM stream event, send event to FE and all active BEs. */
int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
int event)
{
struct snd_soc_dpcm *dpcm;
for_each_dpcm_be(fe, dir, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
be->dai_link->name, event, dir);
if ((event == SND_SOC_DAPM_STREAM_STOP) &&
(be->dpcm[dir].users >= 1))
continue;
snd_soc_dapm_stream_event(be, dir, event);
}
snd_soc_dapm_stream_event(fe, dir, event);
return 0;
}
static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
struct snd_soc_dai *soc_dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int ret;
if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
rtd->dai_link->symmetric_rates)) {
dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
soc_dai->rate);
ret = snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE,
soc_dai->rate);
if (ret < 0) {
dev_err(soc_dai->dev,
"ASoC: Unable to apply rate constraint: %d\n",
ret);
return ret;
}
}
if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
rtd->dai_link->symmetric_channels)) {
dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
soc_dai->channels);
ret = snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_CHANNELS,
soc_dai->channels);
if (ret < 0) {
dev_err(soc_dai->dev,
"ASoC: Unable to apply channel symmetry constraint: %d\n",
ret);
return ret;
}
}
if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
rtd->dai_link->symmetric_samplebits)) {
dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
soc_dai->sample_bits);
ret = snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
soc_dai->sample_bits);
if (ret < 0) {
dev_err(soc_dai->dev,
"ASoC: Unable to apply sample bits symmetry constraint: %d\n",
ret);
return ret;
}
}
return 0;
}
static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
unsigned int rate, channels, sample_bits, symmetry, i;
rate = params_rate(params);
channels = params_channels(params);
sample_bits = snd_pcm_format_physical_width(params_format(params));
/* reject unmatched parameters when applying symmetry */
symmetry = cpu_dai->driver->symmetric_rates ||
rtd->dai_link->symmetric_rates;
for_each_rtd_codec_dai(rtd, i, codec_dai)
symmetry |= codec_dai->driver->symmetric_rates;
if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
cpu_dai->rate, rate);
return -EINVAL;
}
symmetry = cpu_dai->driver->symmetric_channels ||
rtd->dai_link->symmetric_channels;
for_each_rtd_codec_dai(rtd, i, codec_dai)
symmetry |= codec_dai->driver->symmetric_channels;
if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
cpu_dai->channels, channels);
return -EINVAL;
}
symmetry = cpu_dai->driver->symmetric_samplebits ||
rtd->dai_link->symmetric_samplebits;
for_each_rtd_codec_dai(rtd, i, codec_dai)
symmetry |= codec_dai->driver->symmetric_samplebits;
if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
cpu_dai->sample_bits, sample_bits);
return -EINVAL;
}
return 0;
}
static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
struct snd_soc_dai_link *link = rtd->dai_link;
struct snd_soc_dai *codec_dai;
unsigned int symmetry, i;
symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
cpu_driver->symmetric_channels || link->symmetric_channels ||
cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
for_each_rtd_codec_dai(rtd, i, codec_dai)
symmetry = symmetry ||
codec_dai->driver->symmetric_rates ||
codec_dai->driver->symmetric_channels ||
codec_dai->driver->symmetric_samplebits;
return symmetry;
}
static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int ret;
if (!bits)
return;
ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
if (ret != 0)
dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
bits, ret);
}
static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i;
unsigned int bits = 0, cpu_bits;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->driver->playback.sig_bits == 0) {
bits = 0;
break;
}
bits = max(codec_dai->driver->playback.sig_bits, bits);
}
cpu_bits = cpu_dai->driver->playback.sig_bits;
} else {
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->driver->capture.sig_bits == 0) {
bits = 0;
break;
}
bits = max(codec_dai->driver->capture.sig_bits, bits);
}
cpu_bits = cpu_dai->driver->capture.sig_bits;
}
soc_pcm_set_msb(substream, bits);
soc_pcm_set_msb(substream, cpu_bits);
}
static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_pcm_hardware *hw = &runtime->hw;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai;
struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
unsigned int chan_min = 0, chan_max = UINT_MAX;
unsigned int rate_min = 0, rate_max = UINT_MAX;
unsigned int rates = UINT_MAX;
u64 formats = ULLONG_MAX;
int i;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
cpu_stream = &cpu_dai_drv->playback;
else
cpu_stream = &cpu_dai_drv->capture;
/* first calculate min/max only for CODECs in the DAI link */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
/*
* Skip CODECs which don't support the current stream type.
* Otherwise, since the rate, channel, and format values will
* zero in that case, we would have no usable settings left,
* causing the resulting setup to fail.
* At least one CODEC should match, otherwise we should have
* bailed out on a higher level, since there would be no
* CODEC to support the transfer direction in that case.
*/
if (!snd_soc_dai_stream_valid(codec_dai,
substream->stream))
continue;
codec_dai_drv = codec_dai->driver;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
else
codec_stream = &codec_dai_drv->capture;
chan_min = max(chan_min, codec_stream->channels_min);
chan_max = min(chan_max, codec_stream->channels_max);
rate_min = max(rate_min, codec_stream->rate_min);
rate_max = min_not_zero(rate_max, codec_stream->rate_max);
formats &= codec_stream->formats;
rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
}
/*
* chan min/max cannot be enforced if there are multiple CODEC DAIs
* connected to a single CPU DAI, use CPU DAI's directly and let
* channel allocation be fixed up later
*/
if (rtd->num_codecs > 1) {
chan_min = cpu_stream->channels_min;
chan_max = cpu_stream->channels_max;
}
hw->channels_min = max(chan_min, cpu_stream->channels_min);
hw->channels_max = min(chan_max, cpu_stream->channels_max);
if (hw->formats)
hw->formats &= formats & cpu_stream->formats;
else
hw->formats = formats & cpu_stream->formats;
hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
snd_pcm_limit_hw_rates(runtime);
hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
hw->rate_min = max(hw->rate_min, rate_min);
hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
hw->rate_max = min_not_zero(hw->rate_max, rate_max);
}
static int soc_pcm_components_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
int i, ret = 0;
for_each_rtd_components(rtd, i, component) {
ret = snd_soc_component_module_get_when_open(component);
if (ret < 0) {
dev_err(component->dev,
"ASoC: can't get module %s\n",
component->name);
return ret;
}
ret = snd_soc_component_open(component, substream);
if (ret < 0) {
dev_err(component->dev,
"ASoC: can't open component %s: %d\n",
component->name, ret);
return ret;
}
}
return 0;
}
static int soc_pcm_components_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
int i, r, ret = 0;
for_each_rtd_components(rtd, i, component) {
r = snd_soc_component_close(component, substream);
if (r < 0)
ret = r; /* use last ret */
snd_soc_component_module_put_when_close(component);
}
return ret;
}
/*
* Called by ALSA when a PCM substream is closed. Private data can be
* freed here. The cpu DAI, codec DAI, machine and components are also
* shutdown.
*/
static int soc_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i;
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
snd_soc_runtime_deactivate(rtd, substream->stream);
snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
snd_soc_dai_shutdown(cpu_dai, substream);
for_each_rtd_codec_dai(rtd, i, codec_dai)
snd_soc_dai_shutdown(codec_dai, substream);
soc_rtd_shutdown(rtd, substream);
soc_pcm_components_close(substream);
snd_soc_dapm_stream_stop(rtd, substream->stream);
mutex_unlock(&rtd->card->pcm_mutex);
for_each_rtd_components(rtd, i, component) {
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
}
for_each_rtd_components(rtd, i, component)
if (!component->active)
pinctrl_pm_select_sleep_state(component->dev);
return 0;
}
/*
* Called by ALSA when a PCM substream is opened, the runtime->hw record is
* then initialized and any private data can be allocated. This also calls
* startup for the cpu DAI, component, machine and codec DAI.
*/
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
const char *codec_dai_name = "multicodec";
int i, ret = 0;
for_each_rtd_components(rtd, i, component)
pinctrl_pm_select_default_state(component->dev);
for_each_rtd_components(rtd, i, component)
pm_runtime_get_sync(component->dev);
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ret = soc_pcm_components_open(substream);
if (ret < 0)
goto component_err;
ret = soc_rtd_startup(rtd, substream);
if (ret < 0) {
pr_err("ASoC: %s startup failed: %d\n",
rtd->dai_link->name, ret);
goto component_err;
}
/* startup the audio subsystem */
ret = snd_soc_dai_startup(cpu_dai, substream);
if (ret < 0) {
dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
cpu_dai->name, ret);
goto cpu_dai_err;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_startup(codec_dai, substream);
if (ret < 0) {
dev_err(codec_dai->dev,
"ASoC: can't open codec %s: %d\n",
codec_dai->name, ret);
goto config_err;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_dai->tx_mask = 0;
else
codec_dai->rx_mask = 0;
}
/* Dynamic PCM DAI links compat checks use dynamic capabilities */
if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
goto dynamic;
/* Check that the codec and cpu DAIs are compatible */
soc_pcm_init_runtime_hw(substream);
if (rtd->num_codecs == 1)
codec_dai_name = rtd->codec_dai->name;
if (soc_pcm_has_symmetry(substream))
runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
ret = -EINVAL;
if (!runtime->hw.rates) {
printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
codec_dai_name, cpu_dai->name);
goto config_err;
}
if (!runtime->hw.formats) {
printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
codec_dai_name, cpu_dai->name);
goto config_err;
}
if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
runtime->hw.channels_min > runtime->hw.channels_max) {
printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
codec_dai_name, cpu_dai->name);
goto config_err;
}
soc_pcm_apply_msb(substream);
/* Symmetry only applies if we've already got an active stream. */
if (cpu_dai->active) {
ret = soc_pcm_apply_symmetry(substream, cpu_dai);
if (ret != 0)
goto config_err;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->active) {
ret = soc_pcm_apply_symmetry(substream, codec_dai);
if (ret != 0)
goto config_err;
}
}
pr_debug("ASoC: %s <-> %s info:\n",
codec_dai_name, cpu_dai->name);
pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
runtime->hw.channels_max);
pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
runtime->hw.rate_max);
dynamic:
snd_soc_runtime_activate(rtd, substream->stream);
mutex_unlock(&rtd->card->pcm_mutex);
return 0;
config_err:
for_each_rtd_codec_dai(rtd, i, codec_dai)
snd_soc_dai_shutdown(codec_dai, substream);
cpu_dai_err:
snd_soc_dai_shutdown(cpu_dai, substream);
soc_rtd_shutdown(rtd, substream);
component_err:
soc_pcm_components_close(substream);
mutex_unlock(&rtd->card->pcm_mutex);
for_each_rtd_components(rtd, i, component) {
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
}
for_each_rtd_components(rtd, i, component)
if (!component->active)
pinctrl_pm_select_sleep_state(component->dev);
return ret;
}
static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
{
/*
* Currently nothing to do for c2c links
* Since c2c links are internal nodes in the DAPM graph and
* don't interface with the outside world or application layer
* we don't have to do any special handling on close.
*/
}
/*
* Called by ALSA when the PCM substream is prepared, can set format, sample
* rate, etc. This function is non atomic and can be called multiple times,
* it can refer to the runtime info.
*/
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret = 0;
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ret = soc_rtd_prepare(rtd, substream);
if (ret < 0) {
dev_err(rtd->card->dev,
"ASoC: machine prepare error: %d\n", ret);
goto out;
}
for_each_rtd_components(rtd, i, component) {
ret = snd_soc_component_prepare(component, substream);
if (ret < 0) {
dev_err(component->dev,
"ASoC: platform prepare error: %d\n", ret);
goto out;
}
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_prepare(codec_dai, substream);
if (ret < 0) {
dev_err(codec_dai->dev,
"ASoC: codec DAI prepare error: %d\n",
ret);
goto out;
}
}
ret = snd_soc_dai_prepare(cpu_dai, substream);
if (ret < 0) {
dev_err(cpu_dai->dev,
"ASoC: cpu DAI prepare error: %d\n", ret);
goto out;
}
/* cancel any delayed stream shutdown that is pending */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
rtd->pop_wait) {
rtd->pop_wait = 0;
cancel_delayed_work(&rtd->delayed_work);
}
snd_soc_dapm_stream_event(rtd, substream->stream,
SND_SOC_DAPM_STREAM_START);
for_each_rtd_codec_dai(rtd, i, codec_dai)
snd_soc_dai_digital_mute(codec_dai, 0,
substream->stream);
snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
out:
mutex_unlock(&rtd->card->pcm_mutex);
return ret;
}
static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
unsigned int mask)
{
struct snd_interval *interval;
int channels = hweight_long(mask);
interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
interval->min = channels;
interval->max = channels;
}
static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_component *last)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
int i, r, ret = 0;
for_each_rtd_components(rtd, i, component) {
if (component == last)
break;
r = snd_soc_component_hw_free(component, substream);
if (r < 0)
ret = r; /* use last ret */
}
return ret;
}
/*
* Called by ALSA when the hardware params are set by application. This
* function can also be called multiple times and can allocate buffers
* (using snd_pcm_lib_* ). It's non-atomic.
*/
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret = 0;
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ret = soc_pcm_params_symmetry(substream, params);
if (ret)
goto out;
ret = soc_rtd_hw_params(rtd, substream, params);
if (ret < 0) {
dev_err(rtd->card->dev,
"ASoC: machine hw_params failed: %d\n", ret);
goto out;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
struct snd_pcm_hw_params codec_params;
/*
* Skip CODECs which don't support the current stream type,
* the idea being that if a CODEC is not used for the currently
* set up transfer direction, it should not need to be
* configured, especially since the configuration used might
* not even be supported by that CODEC. There may be cases
* however where a CODEC needs to be set up although it is
* actually not being used for the transfer, e.g. if a
* capture-only CODEC is acting as an LRCLK and/or BCLK master
* for the DAI link including a playback-only CODEC.
* If this becomes necessary, we will have to augment the
* machine driver setup with information on how to act, so
* we can do the right thing here.
*/
if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
continue;
/* copy params for each codec */
codec_params = *params;
/* fixup params based on TDM slot masks */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
codec_dai->tx_mask)
soc_pcm_codec_params_fixup(&codec_params,
codec_dai->tx_mask);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
codec_dai->rx_mask)
soc_pcm_codec_params_fixup(&codec_params,
codec_dai->rx_mask);
ret = snd_soc_dai_hw_params(codec_dai, substream,
&codec_params);
if(ret < 0)
goto codec_err;
codec_dai->rate = params_rate(&codec_params);
codec_dai->channels = params_channels(&codec_params);
codec_dai->sample_bits = snd_pcm_format_physical_width(
params_format(&codec_params));
snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
}
ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
if (ret < 0)
goto interface_err;
/* store the parameters for each DAIs */
cpu_dai->rate = params_rate(params);
cpu_dai->channels = params_channels(params);
cpu_dai->sample_bits =
snd_pcm_format_physical_width(params_format(params));
snd_soc_dapm_update_dai(substream, params, cpu_dai);
for_each_rtd_components(rtd, i, component) {
ret = snd_soc_component_hw_params(component, substream, params);
if (ret < 0) {
dev_err(component->dev,
"ASoC: %s hw params failed: %d\n",
component->name, ret);
goto component_err;
}
}
component = NULL;
out:
mutex_unlock(&rtd->card->pcm_mutex);
return ret;
component_err:
soc_pcm_components_hw_free(substream, component);
snd_soc_dai_hw_free(cpu_dai, substream);
cpu_dai->rate = 0;
interface_err:
i = rtd->num_codecs;
codec_err:
for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
continue;
snd_soc_dai_hw_free(codec_dai, substream);
codec_dai->rate = 0;
}
soc_rtd_hw_free(rtd, substream);
mutex_unlock(&rtd->card->pcm_mutex);
return ret;
}
/*
* Frees resources allocated by hw_params, can be called multiple times
*/
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int i;
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
/* clear the corresponding DAIs parameters when going to be inactive */
if (cpu_dai->active == 1) {
cpu_dai->rate = 0;
cpu_dai->channels = 0;
cpu_dai->sample_bits = 0;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->active == 1) {
codec_dai->rate = 0;
codec_dai->channels = 0;
codec_dai->sample_bits = 0;
}
}
/* apply codec digital mute */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if ((playback && codec_dai->playback_active == 1) ||
(!playback && codec_dai->capture_active == 1))
snd_soc_dai_digital_mute(codec_dai, 1,
substream->stream);
}
/* free any machine hw params */
soc_rtd_hw_free(rtd, substream);
/* free any component resources */
soc_pcm_components_hw_free(substream, NULL);
/* now free hw params for the DAIs */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
continue;
snd_soc_dai_hw_free(codec_dai, substream);
}
snd_soc_dai_hw_free(cpu_dai, substream);
mutex_unlock(&rtd->card->pcm_mutex);
return 0;
}
static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret;
ret = soc_rtd_trigger(rtd, substream, cmd);
if (ret < 0)
return ret;
for_each_rtd_components(rtd, i, component) {
ret = snd_soc_component_trigger(component, substream, cmd);
if (ret < 0)
return ret;
}
ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
if (ret < 0)
return ret;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
if (ret < 0)
return ret;
}
return 0;
}
static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
if (ret < 0)
return ret;
}
ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
if (ret < 0)
return ret;
for_each_rtd_components(rtd, i, component) {
ret = snd_soc_component_trigger(component, substream, cmd);
if (ret < 0)
return ret;
}
ret = soc_rtd_trigger(rtd, substream, cmd);
if (ret < 0)
return ret;
return 0;
}
static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
int ret;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = soc_pcm_trigger_start(substream, cmd);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = soc_pcm_trigger_stop(substream, cmd);
break;
default:
return -EINVAL;
}
return ret;
}
static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
if (ret < 0)
return ret;
}
ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
if (ret < 0)
return ret;
return 0;
}
/*
* soc level wrapper for pointer callback
* If cpu_dai, codec_dai, component driver has the delay callback, then
* the runtime->delay will be updated accordingly.
*/
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t offset = 0;
snd_pcm_sframes_t delay = 0;
snd_pcm_sframes_t codec_delay = 0;
int i;
/* clearing the previous total delay */
runtime->delay = 0;
offset = snd_soc_pcm_component_pointer(substream);
/* base delay if assigned in pointer callback */
delay = runtime->delay;
delay += snd_soc_dai_delay(cpu_dai, substream);
for_each_rtd_codec_dai(rtd, i, codec_dai) {
codec_delay = max(codec_delay,
snd_soc_dai_delay(codec_dai, substream));
}
delay += codec_delay;
runtime->delay = delay;
return offset;
}
/* connect a FE and BE */
static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
struct snd_soc_dpcm *dpcm;
unsigned long flags;
#ifdef CONFIG_DEBUG_FS
char *name;
#endif
/* only add new dpcms */
for_each_dpcm_be(fe, stream, dpcm) {
if (dpcm->be == be && dpcm->fe == fe)
return 0;
}
dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
if (!dpcm)
return -ENOMEM;
dpcm->be = be;
dpcm->fe = fe;
be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
stream ? "capture" : "playback", fe->dai_link->name,
stream ? "<-" : "->", be->dai_link->name);
#ifdef CONFIG_DEBUG_FS
name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
stream ? "capture" : "playback");
if (name) {
dpcm->debugfs_state = debugfs_create_dir(name,
fe->debugfs_dpcm_root);
debugfs_create_u32("state", 0644, dpcm->debugfs_state,
&dpcm->state);
kfree(name);
}
#endif
return 1;
}
/* reparent a BE onto another FE */
static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
struct snd_soc_dpcm *dpcm;
struct snd_pcm_substream *fe_substream, *be_substream;
/* reparent if BE is connected to other FEs */
if (!be->dpcm[stream].users)
return;
be_substream = snd_soc_dpcm_get_substream(be, stream);
for_each_dpcm_fe(be, stream, dpcm) {
if (dpcm->fe == fe)
continue;
dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
stream ? "capture" : "playback",
dpcm->fe->dai_link->name,
stream ? "<-" : "->", dpcm->be->dai_link->name);
fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
be_substream->runtime = fe_substream->runtime;
break;
}
}
/* disconnect a BE and FE */
void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm, *d;
unsigned long flags;
for_each_dpcm_be_safe(fe, stream, dpcm, d) {
dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
stream ? "capture" : "playback",
dpcm->be->dai_link->name);
if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
continue;
dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
stream ? "capture" : "playback", fe->dai_link->name,
stream ? "<-" : "->", dpcm->be->dai_link->name);
/* BEs still alive need new FE */
dpcm_be_reparent(fe, dpcm->be, stream);
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(dpcm->debugfs_state);
#endif
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
list_del(&dpcm->list_be);
list_del(&dpcm->list_fe);
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
kfree(dpcm);
}
}
/* get BE for DAI widget and stream */
static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
struct snd_soc_dapm_widget *widget, int stream)
{
struct snd_soc_pcm_runtime *be;
struct snd_soc_dapm_widget *w;
struct snd_soc_dai *dai;
int i;
dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
for_each_card_rtds(card, be) {
if (!be->dai_link->no_pcm)
continue;
w = dai_get_widget(be->cpu_dai, stream);
dev_dbg(card->dev, "ASoC: try BE : %s\n",
w ? w->name : "(not set)");
if (w == widget)
return be;
for_each_rtd_codec_dai(be, i, dai) {
w = dai_get_widget(dai, stream);
if (w == widget)
return be;
}
}
/* dai link name and stream name set correctly ? */
dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
stream ? "capture" : "playback", widget->name);
return NULL;
}
static int widget_in_list(struct snd_soc_dapm_widget_list *list,
struct snd_soc_dapm_widget *widget)
{
struct snd_soc_dapm_widget *w;
int i;
for_each_dapm_widgets(list, i, w)
if (widget == w)
return 1;
return 0;
}
static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
enum snd_soc_dapm_direction dir)
{
struct snd_soc_card *card = widget->dapm->card;
struct snd_soc_pcm_runtime *rtd;
int stream;
/* adjust dir to stream */
if (dir == SND_SOC_DAPM_DIR_OUT)
stream = SNDRV_PCM_STREAM_PLAYBACK;
else
stream = SNDRV_PCM_STREAM_CAPTURE;
rtd = dpcm_get_be(card, widget, stream);
if (rtd)
return true;
return false;
}
int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
int stream, struct snd_soc_dapm_widget_list **list)
{
struct snd_soc_dai *cpu_dai = fe->cpu_dai;
int paths;
/* get number of valid DAI paths and their widgets */
paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
dpcm_end_walk_at_be);
dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
stream ? "capture" : "playback");
return paths;
}
static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
struct snd_soc_dapm_widget_list **list_)
{
struct snd_soc_dpcm *dpcm;
struct snd_soc_dapm_widget_list *list = *list_;
struct snd_soc_dapm_widget *widget;
struct snd_soc_dai *dai;
int prune = 0;
int do_prune;
/* Destroy any old FE <--> BE connections */
for_each_dpcm_be(fe, stream, dpcm) {
unsigned int i;
/* is there a valid CPU DAI widget for this BE */
widget = dai_get_widget(dpcm->be->cpu_dai, stream);
/* prune the BE if it's no longer in our active list */
if (widget && widget_in_list(list, widget))
continue;
/* is there a valid CODEC DAI widget for this BE */
do_prune = 1;
for_each_rtd_codec_dai(dpcm->be, i, dai) {
widget = dai_get_widget(dai, stream);
/* prune the BE if it's no longer in our active list */
if (widget && widget_in_list(list, widget))
do_prune = 0;
}
if (!do_prune)
continue;
dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
stream ? "capture" : "playback",
dpcm->be->dai_link->name, fe->dai_link->name);
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
prune++;
}
dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
return prune;
}
static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
struct snd_soc_dapm_widget_list **list_)
{
struct snd_soc_card *card = fe->card;
struct snd_soc_dapm_widget_list *list = *list_;
struct snd_soc_pcm_runtime *be;
struct snd_soc_dapm_widget *widget;
int i, new = 0, err;
/* Create any new FE <--> BE connections */
for_each_dapm_widgets(list, i, widget) {
switch (widget->id) {
case snd_soc_dapm_dai_in:
if (stream != SNDRV_PCM_STREAM_PLAYBACK)
continue;
break;
case snd_soc_dapm_dai_out:
if (stream != SNDRV_PCM_STREAM_CAPTURE)
continue;
break;
default:
continue;
}
/* is there a valid BE rtd for this widget */
be = dpcm_get_be(card, widget, stream);
if (!be) {
dev_err(fe->dev, "ASoC: no BE found for %s\n",
widget->name);
continue;
}
/* make sure BE is a real BE */
if (!be->dai_link->no_pcm)
continue;
/* don't connect if FE is not running */
if (!fe->dpcm[stream].runtime && !fe->fe_compr)
continue;
/* newly connected FE and BE */
err = dpcm_be_connect(fe, be, stream);
if (err < 0) {
dev_err(fe->dev, "ASoC: can't connect %s\n",
widget->name);
break;
} else if (err == 0) /* already connected */
continue;
/* new */
be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
new++;
}
dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
return new;
}
/*
* Find the corresponding BE DAIs that source or sink audio to this
* FE substream.
*/
int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
int stream, struct snd_soc_dapm_widget_list **list, int new)
{
if (new)
return dpcm_add_paths(fe, stream, list);
else
return dpcm_prune_paths(fe, stream, list);
}
void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
unsigned long flags;
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_be(fe, stream, dpcm)
dpcm->be->dpcm[stream].runtime_update =
SND_SOC_DPCM_UPDATE_NO;
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
}
static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
int stream)
{
struct snd_soc_dpcm *dpcm;
/* disable any enabled and non active backends */
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
if (be->dpcm[stream].users == 0)
dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
stream ? "capture" : "playback",
be->dpcm[stream].state);
if (--be->dpcm[stream].users != 0)
continue;
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
continue;
soc_pcm_close(be_substream);
be_substream->runtime = NULL;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
}
}
int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
int err, count = 0;
/* only startup BE DAIs that are either sinks or sources to this FE DAI */
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
if (!be_substream) {
dev_err(be->dev, "ASoC: no backend %s stream\n",
stream ? "capture" : "playback");
continue;
}
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
/* first time the dpcm is open ? */
if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
dev_err(be->dev, "ASoC: too many users %s at open %d\n",
stream ? "capture" : "playback",
be->dpcm[stream].state);
if (be->dpcm[stream].users++ != 0)
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
continue;
dev_dbg(be->dev, "ASoC: open %s BE %s\n",
stream ? "capture" : "playback", be->dai_link->name);
be_substream->runtime = be->dpcm[stream].runtime;
err = soc_pcm_open(be_substream);
if (err < 0) {
dev_err(be->dev, "ASoC: BE open failed %d\n", err);
be->dpcm[stream].users--;
if (be->dpcm[stream].users < 0)
dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
stream ? "capture" : "playback",
be->dpcm[stream].state);
be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
goto unwind;
}
be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
count++;
}
return count;
unwind:
/* disable any enabled and non active backends */
for_each_dpcm_be_rollback(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
if (be->dpcm[stream].users == 0)
dev_err(be->dev, "ASoC: no users %s at close %d\n",
stream ? "capture" : "playback",
be->dpcm[stream].state);
if (--be->dpcm[stream].users != 0)
continue;
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
continue;
soc_pcm_close(be_substream);
be_substream->runtime = NULL;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
}
return err;
}
static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
struct snd_soc_pcm_stream *stream)
{
runtime->hw.rate_min = stream->rate_min;
runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
runtime->hw.channels_min = stream->channels_min;
runtime->hw.channels_max = stream->channels_max;
if (runtime->hw.formats)
runtime->hw.formats &= stream->formats;
else
runtime->hw.formats = stream->formats;
runtime->hw.rates = stream->rates;
}
static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
u64 *formats)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
struct snd_soc_dpcm *dpcm;
struct snd_soc_dai *dai;
int stream = substream->stream;
if (!fe->dai_link->dpcm_merged_format)
return;
/*
* It returns merged BE codec format
* if FE want to use it (= dpcm_merged_format)
*/
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
int i;
for_each_rtd_codec_dai(be, i, dai) {
/*
* Skip CODECs which don't support the current stream
* type. See soc_pcm_init_runtime_hw() for more details
*/
if (!snd_soc_dai_stream_valid(dai, stream))
continue;
codec_dai_drv = dai->driver;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
else
codec_stream = &codec_dai_drv->capture;
*formats &= codec_stream->formats;
}
}
}
static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
unsigned int *channels_min,
unsigned int *channels_max)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
struct snd_soc_dpcm *dpcm;
int stream = substream->stream;
if (!fe->dai_link->dpcm_merged_chan)
return;
/*
* It returns merged BE codec channel;
* if FE want to use it (= dpcm_merged_chan)
*/
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
cpu_stream = &cpu_dai_drv->playback;
else
cpu_stream = &cpu_dai_drv->capture;
*channels_min = max(*channels_min, cpu_stream->channels_min);
*channels_max = min(*channels_max, cpu_stream->channels_max);
/*
* chan min/max cannot be enforced if there are multiple CODEC
* DAIs connected to a single CPU DAI, use CPU DAI's directly
*/
if (be->num_codecs == 1) {
codec_dai_drv = be->codec_dais[0]->driver;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
else
codec_stream = &codec_dai_drv->capture;
*channels_min = max(*channels_min,
codec_stream->channels_min);
*channels_max = min(*channels_max,
codec_stream->channels_max);
}
}
}
static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
unsigned int *rates,
unsigned int *rate_min,
unsigned int *rate_max)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
struct snd_soc_dpcm *dpcm;
int stream = substream->stream;
if (!fe->dai_link->dpcm_merged_rate)
return;
/*
* It returns merged BE codec channel;
* if FE want to use it (= dpcm_merged_chan)
*/
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
struct snd_soc_dai *dai;
int i;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
cpu_stream = &cpu_dai_drv->playback;
else
cpu_stream = &cpu_dai_drv->capture;
*rate_min = max(*rate_min, cpu_stream->rate_min);
*rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
*rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
for_each_rtd_codec_dai(be, i, dai) {
/*
* Skip CODECs which don't support the current stream
* type. See soc_pcm_init_runtime_hw() for more details
*/
if (!snd_soc_dai_stream_valid(dai, stream))
continue;
codec_dai_drv = dai->driver;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
else
codec_stream = &codec_dai_drv->capture;
*rate_min = max(*rate_min, codec_stream->rate_min);
*rate_max = min_not_zero(*rate_max,
codec_stream->rate_max);
*rates = snd_pcm_rate_mask_intersect(*rates,
codec_stream->rates);
}
}
}
static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
else
dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
dpcm_runtime_merge_format(substream, &runtime->hw.formats);
dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
&runtime->hw.channels_max);
dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
&runtime->hw.rate_min, &runtime->hw.rate_max);
}
static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
/* Set FE's runtime_update state; the state is protected via PCM stream lock
* for avoiding the race with trigger callback.
* If the state is unset and a trigger is pending while the previous operation,
* process the pending trigger action here.
*/
static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
int stream, enum snd_soc_dpcm_update state)
{
struct snd_pcm_substream *substream =
snd_soc_dpcm_get_substream(fe, stream);
snd_pcm_stream_lock_irq(substream);
if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
dpcm_fe_dai_do_trigger(substream,
fe->dpcm[stream].trigger_pending - 1);
fe->dpcm[stream].trigger_pending = 0;
}
fe->dpcm[stream].runtime_update = state;
snd_pcm_stream_unlock_irq(substream);
}
static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
int stream)
{
struct snd_soc_dpcm *dpcm;
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
int err;
/* apply symmetry for FE */
if (soc_pcm_has_symmetry(fe_substream))
fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
/* Symmetry only applies if we've got an active stream. */
if (fe_cpu_dai->active) {
err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
if (err < 0)
return err;
}
/* apply symmetry for BE */
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai *codec_dai;
int i;
/* A backend may not have the requested substream */
if (!be_substream)
continue;
rtd = be_substream->private_data;
if (rtd->dai_link->be_hw_params_fixup)
continue;
if (soc_pcm_has_symmetry(be_substream))
be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
/* Symmetry only applies if we've got an active stream. */
if (rtd->cpu_dai->active) {
err = soc_pcm_apply_symmetry(fe_substream,
rtd->cpu_dai);
if (err < 0)
return err;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->active) {
err = soc_pcm_apply_symmetry(fe_substream,
codec_dai);
if (err < 0)
return err;
}
}
}
return 0;
}
static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
{
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
struct snd_pcm_runtime *runtime = fe_substream->runtime;
int stream = fe_substream->stream, ret = 0;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
ret = dpcm_be_dai_startup(fe, fe_substream->stream);
if (ret < 0) {
dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
goto be_err;
}
dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
/* start the DAI frontend */
ret = soc_pcm_open(fe_substream);
if (ret < 0) {
dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
goto unwind;
}
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
dpcm_set_fe_runtime(fe_substream);
snd_pcm_limit_hw_rates(runtime);
ret = dpcm_apply_symmetry(fe_substream, stream);
if (ret < 0) {
dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
ret);
goto unwind;
}
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return 0;
unwind:
dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
be_err:
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return ret;
}
int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
/* only shutdown BEs that are either sinks or sources to this FE DAI */
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
if (be->dpcm[stream].users == 0)
dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
stream ? "capture" : "playback",
be->dpcm[stream].state);
if (--be->dpcm[stream].users != 0)
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
soc_pcm_hw_free(be_substream);
be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
}
dev_dbg(be->dev, "ASoC: close BE %s\n",
be->dai_link->name);
soc_pcm_close(be_substream);
be_substream->runtime = NULL;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
}
return 0;
}
static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int stream = substream->stream;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
/* shutdown the BEs */
dpcm_be_dai_shutdown(fe, substream->stream);
dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
/* now shutdown the frontend */
soc_pcm_close(substream);
/* run the stream event for each BE */
snd_soc_dapm_stream_stop(fe, stream);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return 0;
}
int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
/* only hw_params backends that are either sinks or sources
* to this frontend DAI */
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
/* only free hw when no longer used - check all FEs */
if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
continue;
/* do not free hw if this BE is used by other FE */
if (be->dpcm[stream].users > 1)
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
continue;
dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
be->dai_link->name);
soc_pcm_hw_free(be_substream);
be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
}
return 0;
}
static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int err, stream = substream->stream;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
/* call hw_free on the frontend */
err = soc_pcm_hw_free(substream);
if (err < 0)
dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
fe->dai_link->name);
/* only hw_params backends that are either sinks or sources
* to this frontend DAI */
err = dpcm_be_dai_hw_free(fe, stream);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
mutex_unlock(&fe->card->mutex);
return 0;
}
int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
int ret;
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
/* copy params for each dpcm */
memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
sizeof(struct snd_pcm_hw_params));
/* perform any hw_params fixups */
if (be->dai_link->be_hw_params_fixup) {
ret = be->dai_link->be_hw_params_fixup(be,
&dpcm->hw_params);
if (ret < 0) {
dev_err(be->dev,
"ASoC: hw_params BE fixup failed %d\n",
ret);
goto unwind;
}
}
/* copy the fixed-up hw params for BE dai */
memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
sizeof(struct snd_pcm_hw_params));
/* only allow hw_params() if no connected FEs are running */
if (!snd_soc_dpcm_can_be_params(fe, be, stream))
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
continue;
dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
be->dai_link->name);
ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
if (ret < 0) {
dev_err(dpcm->be->dev,
"ASoC: hw_params BE failed %d\n", ret);
goto unwind;
}
be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
}
return 0;
unwind:
/* disable any enabled and non active backends */
for_each_dpcm_be_rollback(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
/* only allow hw_free() if no connected FEs are running */
if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
continue;
soc_pcm_hw_free(be_substream);
}
return ret;
}
static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int ret, stream = substream->stream;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
memcpy(&fe->dpcm[substream->stream].hw_params, params,
sizeof(struct snd_pcm_hw_params));
ret = dpcm_be_dai_hw_params(fe, substream->stream);
if (ret < 0) {
dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
goto out;
}
dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
fe->dai_link->name, params_rate(params),
params_channels(params), params_format(params));
/* call hw_params on the frontend */
ret = soc_pcm_hw_params(substream, params);
if (ret < 0) {
dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
dpcm_be_dai_hw_free(fe, stream);
} else
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
out:
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
mutex_unlock(&fe->card->mutex);
return ret;
}
static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
struct snd_pcm_substream *substream, int cmd)
{
int ret;
dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
dpcm->be->dai_link->name, cmd);
ret = soc_pcm_trigger(substream, cmd);
if (ret < 0)
dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
return ret;
}
int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
int cmd)
{
struct snd_soc_dpcm *dpcm;
int ret = 0;
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
break;
case SNDRV_PCM_TRIGGER_RESUME:
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
break;
case SNDRV_PCM_TRIGGER_STOP:
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
continue;
if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
continue;
if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
continue;
if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
continue;
ret = dpcm_do_trigger(dpcm, be_substream, cmd);
if (ret)
return ret;
be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
break;
}
}
return ret;
}
EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
int cmd, bool fe_first)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int ret;
/* call trigger on the frontend before the backend. */
if (fe_first) {
dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
fe->dai_link->name, cmd);
ret = soc_pcm_trigger(substream, cmd);
if (ret < 0)
return ret;
ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
return ret;
}
/* call trigger on the frontend after the backend. */
ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
if (ret < 0)
return ret;
dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
fe->dai_link->name, cmd);
ret = soc_pcm_trigger(substream, cmd);
return ret;
}
static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int stream = substream->stream;
int ret = 0;
enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
switch (trigger) {
case SND_SOC_DPCM_TRIGGER_PRE:
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
break;
default:
ret = -EINVAL;
break;
}
break;
case SND_SOC_DPCM_TRIGGER_POST:
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
break;
default:
ret = -EINVAL;
break;
}
break;
case SND_SOC_DPCM_TRIGGER_BESPOKE:
/* bespoke trigger() - handles both FE and BEs */
dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
fe->dai_link->name, cmd);
ret = soc_pcm_bespoke_trigger(substream, cmd);
break;
default:
dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
fe->dai_link->name);
ret = -EINVAL;
goto out;
}
if (ret < 0) {
dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
cmd, ret);
goto out;
}
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;
return ret;
}
static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int stream = substream->stream;
/* if FE's runtime_update is already set, we're in race;
* process this trigger later at exit
*/
if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
fe->dpcm[stream].trigger_pending = cmd + 1;
return 0; /* delayed, assuming it's successful */
}
/* we're alone, let's trigger */
return dpcm_fe_dai_do_trigger(substream, cmd);
}
int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm;
int ret = 0;
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))
continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
(be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
continue;
dev_dbg(be->dev, "ASoC: prepare BE %s\n",
be->dai_link->name);
ret = soc_pcm_prepare(be_substream);
if (ret < 0) {
dev_err(be->dev, "ASoC: backend prepare failed %d\n",
ret);
break;
}
be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
}
return ret;
}
static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int stream = substream->stream, ret = 0;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
/* there is no point preparing this FE if there are no BEs */
if (list_empty(&fe->dpcm[stream].be_clients)) {
dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
fe->dai_link->name);
ret = -EINVAL;
goto out;
}
ret = dpcm_be_dai_prepare(fe, substream->stream);
if (ret < 0)
goto out;
/* call prepare on the frontend */
ret = soc_pcm_prepare(substream);
if (ret < 0) {
dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
fe->dai_link->name);
goto out;
}
/* run the stream event for each BE */
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
out:
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
mutex_unlock(&fe->card->mutex);
return ret;
}
static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_pcm_substream *substream =
snd_soc_dpcm_get_substream(fe, stream);
enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
int err;
dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
stream ? "capture" : "playback", fe->dai_link->name);
if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
/* call bespoke trigger - FE takes care of all BE triggers */
dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
fe->dai_link->name);
err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
if (err < 0)
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
} else {
dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
fe->dai_link->name);
err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
if (err < 0)
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
}
err = dpcm_be_dai_hw_free(fe, stream);
if (err < 0)
dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
err = dpcm_be_dai_shutdown(fe, stream);
if (err < 0)
dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
/* run the stream event for each BE */
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
return 0;
}
static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_pcm_substream *substream =
snd_soc_dpcm_get_substream(fe, stream);
struct snd_soc_dpcm *dpcm;
enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
int ret;
unsigned long flags;
dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
stream ? "capture" : "playback", fe->dai_link->name);
/* Only start the BE if the FE is ready */
if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
return -EINVAL;
/* startup must always be called for new BEs */
ret = dpcm_be_dai_startup(fe, stream);
if (ret < 0)
goto disconnect;
/* keep going if FE state is > open */
if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
return 0;
ret = dpcm_be_dai_hw_params(fe, stream);
if (ret < 0)
goto close;
/* keep going if FE state is > hw_params */
if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
return 0;
ret = dpcm_be_dai_prepare(fe, stream);
if (ret < 0)
goto hw_free;
/* run the stream event for each BE */
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
/* keep going if FE state is > prepare */
if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
return 0;
if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
/* call trigger on the frontend - FE takes care of all BE triggers */
dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
fe->dai_link->name);
ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
if (ret < 0) {
dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
goto hw_free;
}
} else {
dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
fe->dai_link->name);
ret = dpcm_be_dai_trigger(fe, stream,
SNDRV_PCM_TRIGGER_START);
if (ret < 0) {
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
goto hw_free;
}
}
return 0;
hw_free:
dpcm_be_dai_hw_free(fe, stream);
close:
dpcm_be_dai_shutdown(fe, stream);
disconnect:
/* disconnect any non started BEs */
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
}
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
return ret;
}
static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
{
int ret;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
ret = dpcm_run_update_startup(fe, stream);
if (ret < 0)
dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return ret;
}
static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
{
int ret;
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
ret = dpcm_run_update_shutdown(fe, stream);
if (ret < 0)
dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
return ret;
}
static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
{
struct snd_soc_dapm_widget_list *list;
int count, paths;
if (!fe->dai_link->dynamic)
return 0;
/* only check active links */
if (!fe->cpu_dai->active)
return 0;
/* DAPM sync will call this to update DSP paths */
dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
new ? "new" : "old", fe->dai_link->name);
/* skip if FE doesn't have playback capability */
if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
!snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
goto capture;
/* skip if FE isn't currently playing */
if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
goto capture;
paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
if (paths < 0) {
dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
fe->dai_link->name, "playback");
return paths;
}
/* update any playback paths */
count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
if (count) {
if (new)
dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
else
dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
}
dpcm_path_put(&list);
capture:
/* skip if FE doesn't have capture capability */
if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
!snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
return 0;
/* skip if FE isn't currently capturing */
if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
return 0;
paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
if (paths < 0) {
dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
fe->dai_link->name, "capture");
return paths;
}
/* update any old capture paths */
count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
if (count) {
if (new)
dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
else
dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
}
dpcm_path_put(&list);
return 0;
}
/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
* any DAI links.
*/
int soc_dpcm_runtime_update(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *fe;
int ret = 0;
mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
/* shutdown all old paths first */
for_each_card_rtds(card, fe) {
ret = soc_dpcm_fe_runtime_update(fe, 0);
if (ret)
goto out;
}
/* bring new paths up */
for_each_card_rtds(card, fe) {
ret = soc_dpcm_fe_runtime_update(fe, 1);
if (ret)
goto out;
}
out:
mutex_unlock(&card->mutex);
return ret;
}
static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
{
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
struct snd_soc_dpcm *dpcm;
struct snd_soc_dapm_widget_list *list;
int ret;
int stream = fe_substream->stream;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
fe->dpcm[stream].runtime = fe_substream->runtime;
ret = dpcm_path_get(fe, stream, &list);
if (ret < 0) {
mutex_unlock(&fe->card->mutex);
return ret;
} 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);
ret = dpcm_fe_dai_startup(fe_substream);
if (ret < 0) {
/* clean up all links */
for_each_dpcm_be(fe, stream, dpcm)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
}
dpcm_clear_pending_state(fe, stream);
dpcm_path_put(&list);
mutex_unlock(&fe->card->mutex);
return ret;
}
static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
{
struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
struct snd_soc_dpcm *dpcm;
int stream = fe_substream->stream, ret;
mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ret = dpcm_fe_dai_shutdown(fe_substream);
/* mark FE's links ready to prune */
for_each_dpcm_be(fe, stream, dpcm)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
mutex_unlock(&fe->card->mutex);
return ret;
}
/* create a new pcm */
int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
struct snd_soc_dai *codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_component *component;
struct snd_pcm *pcm;
char new_name[64];
int ret = 0, playback = 0, capture = 0;
int i;
if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
playback = rtd->dai_link->dpcm_playback;
capture = rtd->dai_link->dpcm_capture;
} else {
/* Adapt stream for codec2codec links */
int cpu_capture = rtd->dai_link->params ?
SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
int cpu_playback = rtd->dai_link->params ?
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
playback = 1;
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
capture = 1;
}
}
if (rtd->dai_link->playback_only) {
playback = 1;
capture = 0;
}
if (rtd->dai_link->capture_only) {
playback = 0;
capture = 1;
}
/* create the PCM */
if (rtd->dai_link->params) {
snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
rtd->dai_link->stream_name);
ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
playback, capture, &pcm);
} else if (rtd->dai_link->no_pcm) {
snprintf(new_name, sizeof(new_name), "(%s)",
rtd->dai_link->stream_name);
ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
playback, capture, &pcm);
} else {
if (rtd->dai_link->dynamic)
snprintf(new_name, sizeof(new_name), "%s (*)",
rtd->dai_link->stream_name);
else
snprintf(new_name, sizeof(new_name), "%s %s-%d",
rtd->dai_link->stream_name,
(rtd->num_codecs > 1) ?
"multicodec" : rtd->codec_dai->name, num);
ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
capture, &pcm);
}
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
rtd->dai_link->name);
return ret;
}
dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
/* DAPM dai link stream work */
if (rtd->dai_link->params)
rtd->close_delayed_work_func = codec2codec_close_delayed_work;
else
rtd->close_delayed_work_func = snd_soc_close_delayed_work;
pcm->nonatomic = rtd->dai_link->nonatomic;
rtd->pcm = pcm;
pcm->private_data = rtd;
if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
if (playback)
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
if (capture)
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
goto out;
}
/* ASoC PCM operations */
if (rtd->dai_link->dynamic) {
rtd->ops.open = dpcm_fe_dai_open;
rtd->ops.hw_params = dpcm_fe_dai_hw_params;
rtd->ops.prepare = dpcm_fe_dai_prepare;
rtd->ops.trigger = dpcm_fe_dai_trigger;
rtd->ops.hw_free = dpcm_fe_dai_hw_free;
rtd->ops.close = dpcm_fe_dai_close;
rtd->ops.pointer = soc_pcm_pointer;
} else {
rtd->ops.open = soc_pcm_open;
rtd->ops.hw_params = soc_pcm_hw_params;
rtd->ops.prepare = soc_pcm_prepare;
rtd->ops.trigger = soc_pcm_trigger;
rtd->ops.hw_free = soc_pcm_hw_free;
rtd->ops.close = soc_pcm_close;
rtd->ops.pointer = soc_pcm_pointer;
}
for_each_rtd_components(rtd, i, component) {
const struct snd_soc_component_driver *drv = component->driver;
if (drv->ioctl)
rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
if (drv->sync_stop)
rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
if (drv->copy_user)
rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
if (drv->page)
rtd->ops.page = snd_soc_pcm_component_page;
if (drv->mmap)
rtd->ops.mmap = snd_soc_pcm_component_mmap;
}
if (playback)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
if (capture)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ret = snd_soc_pcm_component_new(rtd);
if (ret < 0) {
dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
return ret;
}
pcm->no_device_suspend = true;
out:
dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
(rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
cpu_dai->name);
return ret;
}
/* is the current PCM operation for this FE ? */
int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
{
if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
return 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
/* is the current PCM operation for this BE ? */
int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
be->dpcm[stream].runtime_update))
return 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
/* get the substream for this BE */
struct snd_pcm_substream *
snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
{
return be->pcm->streams[stream].substream;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
/* get the BE runtime state */
enum snd_soc_dpcm_state
snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
{
return be->dpcm[stream].state;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
/* set the BE runtime state */
void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
int stream, enum snd_soc_dpcm_state state)
{
be->dpcm[stream].state = state;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
/*
* We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
* are not running, paused or suspended for the specified stream direction.
*/
int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
struct snd_soc_dpcm *dpcm;
int state;
int ret = 1;
unsigned long flags;
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_fe(be, stream, dpcm) {
if (dpcm->fe == fe)
continue;
state = dpcm->fe->dpcm[stream].state;
if (state == SND_SOC_DPCM_STATE_START ||
state == SND_SOC_DPCM_STATE_PAUSED ||
state == SND_SOC_DPCM_STATE_SUSPEND) {
ret = 0;
break;
}
}
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
/* it's safe to free/stop this BE DAI */
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
/*
* We can only change hw params a BE DAI if any of it's FE are not prepared,
* running, paused or suspended for the specified stream direction.
*/
int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
struct snd_soc_dpcm *dpcm;
int state;
int ret = 1;
unsigned long flags;
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_fe(be, stream, dpcm) {
if (dpcm->fe == fe)
continue;
state = dpcm->fe->dpcm[stream].state;
if (state == SND_SOC_DPCM_STATE_START ||
state == SND_SOC_DPCM_STATE_PAUSED ||
state == SND_SOC_DPCM_STATE_SUSPEND ||
state == SND_SOC_DPCM_STATE_PREPARE) {
ret = 0;
break;
}
}
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
/* it's safe to change hw_params */
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
#ifdef CONFIG_DEBUG_FS
static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
{
switch (state) {
case SND_SOC_DPCM_STATE_NEW:
return "new";
case SND_SOC_DPCM_STATE_OPEN:
return "open";
case SND_SOC_DPCM_STATE_HW_PARAMS:
return "hw_params";
case SND_SOC_DPCM_STATE_PREPARE:
return "prepare";
case SND_SOC_DPCM_STATE_START:
return "start";
case SND_SOC_DPCM_STATE_STOP:
return "stop";
case SND_SOC_DPCM_STATE_SUSPEND:
return "suspend";
case SND_SOC_DPCM_STATE_PAUSED:
return "paused";
case SND_SOC_DPCM_STATE_HW_FREE:
return "hw_free";
case SND_SOC_DPCM_STATE_CLOSE:
return "close";
}
return "unknown";
}
static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
int stream, char *buf, size_t size)
{
struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
struct snd_soc_dpcm *dpcm;
ssize_t offset = 0;
unsigned long flags;
/* FE state */
offset += snprintf(buf + offset, size - offset,
"[%s - %s]\n", fe->dai_link->name,
stream ? "Capture" : "Playback");
offset += snprintf(buf + offset, size - offset, "State: %s\n",
dpcm_state_string(fe->dpcm[stream].state));
if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
(fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
offset += snprintf(buf + offset, size - offset,
"Hardware Params: "
"Format = %s, Channels = %d, Rate = %d\n",
snd_pcm_format_name(params_format(params)),
params_channels(params),
params_rate(params));
/* BEs state */
offset += snprintf(buf + offset, size - offset, "Backends:\n");
if (list_empty(&fe->dpcm[stream].be_clients)) {
offset += snprintf(buf + offset, size - offset,
" No active DSP links\n");
goto out;
}
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
params = &dpcm->hw_params;
offset += snprintf(buf + offset, size - offset,
"- %s\n", be->dai_link->name);
offset += snprintf(buf + offset, size - offset,
" State: %s\n",
dpcm_state_string(be->dpcm[stream].state));
if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
(be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
offset += snprintf(buf + offset, size - offset,
" Hardware Params: "
"Format = %s, Channels = %d, Rate = %d\n",
snd_pcm_format_name(params_format(params)),
params_channels(params),
params_rate(params));
}
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
out:
return offset;
}
static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct snd_soc_pcm_runtime *fe = file->private_data;
ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
char *buf;
buf = kmalloc(out_count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
buf + offset, out_count - offset);
if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
buf + offset, out_count - offset);
ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
kfree(buf);
return ret;
}
static const struct file_operations dpcm_state_fops = {
.open = simple_open,
.read = dpcm_state_read_file,
.llseek = default_llseek,
};
void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
{
if (!rtd->dai_link)
return;
if (!rtd->dai_link->dynamic)
return;
if (!rtd->card->debugfs_card_root)
return;
rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
rtd->card->debugfs_card_root);
debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
rtd, &dpcm_state_fops);
}
#endif
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