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linux/sound/soc/soc-pcm.c
Hans de Goede 0632fa0425
ASoC: core: Fix pcm code debugfs error 
We can have 2 dcpm-s with the same backend and frontend name
(capture + playback pair), this causes the following debugfs error
on Intel Bay Trail systems:

[  298.969049] debugfs: Directory 'SSP2-Codec' with parent 'Baytrail Audio Port' already present!

This commit adds a ":playback" or ":capture" postfix to the debugfs dir
name fixing this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191005212202.5206-1-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-10-07 13:51:09 +01:00

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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
/**
* 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)
{
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++;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->playback_active++;
} else {
cpu_dai->capture_active++;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->capture_active++;
}
cpu_dai->active++;
cpu_dai->component->active++;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
codec_dai->active++;
codec_dai->component->active++;
}
}
/**
* 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)
{
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--;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->playback_active--;
} else {
cpu_dai->capture_active--;
for_each_rtd_codec_dai(rtd, i, codec_dai)
codec_dai->capture_active--;
}
cpu_dai->active--;
cpu_dai->component->active--;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
codec_dai->component->active--;
codec_dai->active--;
}
}
/**
* 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_rtdcom_list *rtdcom;
struct snd_soc_component *component;
bool ignore = true;
if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
return true;
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->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_component **last)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_component *component;
int ret = 0;
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
*last = 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;
}
}
*last = NULL;
return 0;
}
static int soc_pcm_components_close(struct snd_pcm_substream *substream,
struct snd_soc_component *last)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_component *component;
int ret = 0;
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
if (component == last)
break;
ret |= snd_soc_component_close(component, substream);
snd_soc_component_module_put_when_close(component);
}
return ret;
}
/*
* 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_rtdcom_list *rtdcom;
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;
pinctrl_pm_select_default_state(cpu_dai->dev);
for_each_rtd_codec_dai(rtd, i, codec_dai)
pinctrl_pm_select_default_state(codec_dai->dev);
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
pm_runtime_get_sync(component->dev);
}
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
/* 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 out;
}
ret = soc_pcm_components_open(substream, &component);
if (ret < 0)
goto component_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 codec_dai_err;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_dai->tx_mask = 0;
else
codec_dai->rx_mask = 0;
}
if (rtd->dai_link->ops->startup) {
ret = rtd->dai_link->ops->startup(substream);
if (ret < 0) {
pr_err("ASoC: %s startup failed: %d\n",
rtd->dai_link->name, ret);
goto machine_err;
}
}
/* 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:
if (rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
machine_err:
i = rtd->num_codecs;
codec_dai_err:
for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
snd_soc_dai_shutdown(codec_dai, substream);
component_err:
soc_pcm_components_close(substream, component);
snd_soc_dai_shutdown(cpu_dai, substream);
out:
mutex_unlock(&rtd->card->pcm_mutex);
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (!codec_dai->active)
pinctrl_pm_select_sleep_state(codec_dai->dev);
}
if (!cpu_dai->active)
pinctrl_pm_select_sleep_state(cpu_dai->dev);
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_dais[0];
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
codec_dai->driver->playback.stream_name,
codec_dai->playback_active ? "active" : "inactive",
rtd->pop_wait ? "yes" : "no");
/* are we waiting on this codec DAI stream */
if (rtd->pop_wait == 1) {
rtd->pop_wait = 0;
snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->card->pcm_mutex);
}
static void codec2codec_close_delayed_work(struct work_struct *work)
{
/*
* 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 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_rtdcom_list *rtdcom;
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);
/* clear the corresponding DAIs rate when inactive */
if (!cpu_dai->active)
cpu_dai->rate = 0;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (!codec_dai->active)
codec_dai->rate = 0;
}
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);
if (rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
soc_pcm_components_close(substream, NULL);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
/* powered down playback stream now */
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
} else {
/* start delayed pop wq here for playback streams */
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->card->pcm_mutex);
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (!codec_dai->active)
pinctrl_pm_select_sleep_state(codec_dai->dev);
}
if (!cpu_dai->active)
pinctrl_pm_select_sleep_state(cpu_dai->dev);
return 0;
}
/*
* 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_rtdcom_list *rtdcom;
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);
if (rtd->dai_link->ops->prepare) {
ret = rtd->dai_link->ops->prepare(substream);
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: machine prepare error:"
" %d\n", ret);
goto out;
}
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->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_rtdcom_list *rtdcom;
struct snd_soc_component *component;
int ret = 0;
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->component;
if (component == last)
break;
ret |= snd_soc_component_hw_free(component, substream);
}
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_rtdcom_list *rtdcom;
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);
if (rtd->dai_link->ops->hw_params) {
ret = rtd->dai_link->ops->hw_params(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_rtdcom(rtd, rtdcom) {
component = rtdcom->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;
ret = soc_pcm_params_symmetry(substream, params);
if (ret)
goto component_err;
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;
}
if (rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(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 */
if (rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(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(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
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;
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;
}
for_each_rtdcom(rtd, rtdcom) {
component = rtdcom->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;
if (rtd->dai_link->ops->trigger) {
ret = rtd->dai_link->ops->trigger(substream, cmd);
if (ret < 0)
return ret;
}
return 0;
}
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;
char *name;
/* 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_dai *dai;
int i;
dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
for_each_card_rtds(card, be) {
if (!be->dai_link->no_pcm)
continue;
dev_dbg(card->dev, "ASoC: try BE : %s\n",
be->cpu_dai->playback_widget ?
be->cpu_dai->playback_widget->name : "(not set)");
if (be->cpu_dai->playback_widget == widget)
return be;
for_each_rtd_codec_dai(be, i, dai) {
if (dai->playback_widget == widget)
return be;
}
}
} else {
for_each_card_rtds(card, be) {
if (!be->dai_link->no_pcm)
continue;
dev_dbg(card->dev, "ASoC: try BE %s\n",
be->cpu_dai->capture_widget ?
be->cpu_dai->capture_widget->name : "(not set)");
if (be->cpu_dai->capture_widget == widget)
return be;
for_each_rtd_codec_dai(be, i, dai) {
if (dai->capture_widget == 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 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 int widget_in_list(struct snd_soc_dapm_widget_list *list,
struct snd_soc_dapm_widget *widget)
{
int i;
for (i = 0; i < list->num_widgets; i++) {
if (widget == list->widgets[i])
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;
struct snd_soc_dai *dai;
int i;
if (dir == SND_SOC_DAPM_DIR_OUT) {
for_each_card_rtds(card, rtd) {
if (!rtd->dai_link->no_pcm)
continue;
if (rtd->cpu_dai->playback_widget == widget)
return true;
for_each_rtd_codec_dai(rtd, i, dai) {
if (dai->playback_widget == widget)
return true;
}
}
} else { /* SND_SOC_DAPM_DIR_IN */
for_each_card_rtds(card, rtd) {
if (!rtd->dai_link->no_pcm)
continue;
if (rtd->cpu_dai->capture_widget == widget)
return true;
for_each_rtd_codec_dai(rtd, i, dai) {
if (dai->capture_widget == widget)
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;
/* 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 */
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))
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;
int i, new = 0, err;
/* Create any new FE <--> BE connections */
for (i = 0; i < list->num_widgets; i++) {
switch (list->widgets[i]->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, list->widgets[i], stream);
if (!be) {
dev_err(fe->dev, "ASoC: no BE found for %s\n",
list->widgets[i]->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",
list->widgets[i]->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 */
dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
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_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
int stream = substream->stream, ret;
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:
/* call trigger on the frontend before the backend. */
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) {
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
goto out;
}
ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
break;
case SND_SOC_DPCM_TRIGGER_POST:
/* call trigger on the frontend after the backend. */
ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
if (ret < 0) {
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
goto out;
}
dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
fe->dai_link->name, cmd);
ret = soc_pcm_trigger(substream, cmd);
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);
if (ret < 0) {
dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
goto out;
}
break;
default:
dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
fe->dai_link->name);
ret = -EINVAL;
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;
}
int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
{
struct snd_soc_dpcm *dpcm;
struct snd_soc_dai *dai;
for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
int i;
if (be->dai_link->ignore_suspend)
continue;
for_each_rtd_codec_dai(be, i, dai) {
struct snd_soc_dai_driver *drv = dai->driver;
dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
be->dai_link->name);
if (drv->ops && drv->ops->digital_mute &&
dai->playback_active)
drv->ops->digital_mute(dai, mute);
}
}
return 0;
}
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;
}
static void soc_pcm_private_free(struct snd_pcm *pcm)
{
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
/* need to sync the delayed work before releasing resources */
flush_delayed_work(&rtd->delayed_work);
snd_soc_pcm_component_free(pcm);
}
/* 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_rtdcom_list *rtdcom;
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 */
struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
&cpu_dai->driver->playback : &cpu_dai->driver->capture;
struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
&cpu_dai->driver->capture : &cpu_dai->driver->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, SNDRV_PCM_STREAM_PLAYBACK))
playback = 1;
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
capture = 1;
}
capture = capture && cpu_capture->channels_min;
playback = playback && cpu_playback->channels_min;
}
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)
INIT_DELAYED_WORK(&rtd->delayed_work,
codec2codec_close_delayed_work);
else
INIT_DELAYED_WORK(&rtd->delayed_work, 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;
rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
} 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;
rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
}
for_each_rtdcom(rtd, rtdcom) {
const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
if (!ops)
continue;
if (ops->copy_user)
rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
if (ops->page)
rtd->ops.page = snd_soc_pcm_component_page;
if (ops->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(pcm);
if (ret < 0) {
dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
return ret;
}
pcm->private_free = soc_pcm_private_free;
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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