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c5b8540dca
linux/sound/soc/soc-pcm.c
Koro Chen c5b8540dca ASoC: dpcm: Add checks of playback/capture before dpcm_get_be 
In dpcm_get_be(), it looks for a BE rtd that has the DAI widget
according to current stream type. Only playback_widgets are searched
in the case of playback stream and vice versa. However, the DAI widget
itself can be playback or capture.

If the DAI widget is capture, but current stream type is playback,
dpcm_get_be() will always fail to find a rtd, print error messages,
and continue to the next DAI widget in list. We can just skip this
DAI widget to further suppress error messages. This happens in a
special case when 2 codecs are inter-connected, and the 1st codec's
"capture" widget is used to send data to the 2nd codec during "playback":

mtk-rt5650-rt5676 sound: ASoC: can't get playback BE for Sub AIF2 Capture
rt5650_rt5676 Playback: ASoC: no BE found for Sub AIF2 Capture

Add checks to continue to next DAI widget if current DAI widget's
direction does not match the stream type.

Signed-off-by: Koro Chen <koro.chen@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-07-07 14:56:15 +01:00

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/*
* 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>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/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->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;
int i;
lockdep_assert_held(&rtd->pcm_mutex);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
cpu_dai->playback_active++;
for (i = 0; i < rtd->num_codecs; i++)
rtd->codec_dais[i]->playback_active++;
} else {
cpu_dai->capture_active++;
for (i = 0; i < rtd->num_codecs; i++)
rtd->codec_dais[i]->capture_active++;
}
cpu_dai->active++;
cpu_dai->component->active++;
for (i = 0; i < rtd->num_codecs; i++) {
rtd->codec_dais[i]->active++;
rtd->codec_dais[i]->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->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;
int i;
lockdep_assert_held(&rtd->pcm_mutex);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
cpu_dai->playback_active--;
for (i = 0; i < rtd->num_codecs; i++)
rtd->codec_dais[i]->playback_active--;
} else {
cpu_dai->capture_active--;
for (i = 0; i < rtd->num_codecs; i++)
rtd->codec_dais[i]->capture_active--;
}
cpu_dai->active--;
cpu_dai->component->active--;
for (i = 0; i < rtd->num_codecs; i++) {
rtd->codec_dais[i]->component->active--;
rtd->codec_dais[i]->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)
{
int i;
bool ignore = true;
if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
return true;
for (i = 0; i < rtd->num_codecs; i++)
ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
return rtd->cpu_dai->component->ignore_pmdown_time && 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;
list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
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);
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_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE,
soc_dai->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_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_CHANNELS,
soc_dai->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_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
soc_dai->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;
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 (i = 0; i < rtd->num_codecs; i++)
symmetry |= rtd->codec_dais[i]->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 (i = 0; i < rtd->num_codecs; i++)
symmetry |= rtd->codec_dais[i]->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 (i = 0; i < rtd->num_codecs; i++)
symmetry |= rtd->codec_dais[i]->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;
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 (i = 0; i < rtd->num_codecs; i++)
symmetry = symmetry ||
rtd->codec_dais[i]->driver->symmetric_rates ||
rtd->codec_dais[i]->driver->symmetric_channels ||
rtd->codec_dais[i]->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 (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
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 (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
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_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 (i = 0; i < rtd->num_codecs; i++) {
codec_dai_drv = rtd->codec_dais[i]->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);
}
/*
* 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, platform, 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_platform *platform = rtd->platform;
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 (i = 0; i < rtd->num_codecs; i++)
pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
pm_runtime_get_sync(cpu_dai->dev);
for (i = 0; i < rtd->num_codecs; i++)
pm_runtime_get_sync(rtd->codec_dais[i]->dev);
pm_runtime_get_sync(platform->dev);
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
/* startup the audio subsystem */
if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
if (ret < 0) {
dev_err(cpu_dai->dev, "ASoC: can't open interface"
" %s: %d\n", cpu_dai->name, ret);
goto out;
}
}
if (platform->driver->ops && platform->driver->ops->open) {
ret = platform->driver->ops->open(substream);
if (ret < 0) {
dev_err(platform->dev, "ASoC: can't open platform"
" %s: %d\n", platform->component.name, ret);
goto platform_err;
}
}
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
ret = codec_dai->driver->ops->startup(substream,
codec_dai);
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 && 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 (i = 0; i < rtd->num_codecs; i++) {
if (rtd->codec_dais[i]->active) {
ret = soc_pcm_apply_symmetry(substream,
rtd->codec_dais[i]);
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->pcm_mutex);
return 0;
config_err:
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
machine_err:
i = rtd->num_codecs;
codec_dai_err:
while (--i >= 0) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops->shutdown)
codec_dai->driver->ops->shutdown(substream, codec_dai);
}
if (platform->driver->ops && platform->driver->ops->close)
platform->driver->ops->close(substream);
platform_err:
if (cpu_dai->driver->ops->shutdown)
cpu_dai->driver->ops->shutdown(substream, cpu_dai);
out:
mutex_unlock(&rtd->pcm_mutex);
pm_runtime_put(platform->dev);
for (i = 0; i < rtd->num_codecs; i++)
pm_runtime_put(rtd->codec_dais[i]->dev);
pm_runtime_put(cpu_dai->dev);
for (i = 0; i < rtd->num_codecs; i++) {
if (!rtd->codec_dais[i]->active)
pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->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->pcm_mutex, rtd->pcm_subclass);
dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
codec_dai->driver->playback.stream_name,
codec_dai->playback_active ? "active" : "inactive",
rtd->pop_wait ? "yes" : "no");
/* are we waiting on this codec DAI stream */
if (rtd->pop_wait == 1) {
rtd->pop_wait = 0;
snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->pcm_mutex);
}
/*
* Called by ALSA when a PCM substream is closed. Private data can be
* freed here. The cpu DAI, codec DAI, machine and platform 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_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i;
mutex_lock_nested(&rtd->pcm_mutex, rtd->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 (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (!codec_dai->active)
codec_dai->rate = 0;
}
snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
if (cpu_dai->driver->ops->shutdown)
cpu_dai->driver->ops->shutdown(substream, cpu_dai);
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops->shutdown)
codec_dai->driver->ops->shutdown(substream, codec_dai);
}
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
if (platform->driver->ops && platform->driver->ops->close)
platform->driver->ops->close(substream);
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->pcm_mutex);
pm_runtime_put(platform->dev);
for (i = 0; i < rtd->num_codecs; i++)
pm_runtime_put(rtd->codec_dais[i]->dev);
pm_runtime_put(cpu_dai->dev);
for (i = 0; i < rtd->num_codecs; i++) {
if (!rtd->codec_dais[i]->active)
pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->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_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (rtd->dai_link->ops && 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;
}
}
if (platform->driver->ops && platform->driver->ops->prepare) {
ret = platform->driver->ops->prepare(substream);
if (ret < 0) {
dev_err(platform->dev, "ASoC: platform prepare error:"
" %d\n", ret);
goto out;
}
}
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
ret = codec_dai->driver->ops->prepare(substream,
codec_dai);
if (ret < 0) {
dev_err(codec_dai->dev,
"ASoC: codec DAI prepare error: %d\n",
ret);
goto out;
}
}
}
if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
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 (i = 0; i < rtd->num_codecs; i++)
snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
substream->stream);
snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
out:
mutex_unlock(&rtd->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;
}
int soc_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int ret;
if (dai->driver->ops && dai->driver->ops->hw_params) {
ret = dai->driver->ops->hw_params(substream, params, dai);
if (ret < 0) {
dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
dai->name, ret);
return ret;
}
}
return 0;
}
/*
* 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_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int i, ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ret = soc_pcm_params_symmetry(substream, params);
if (ret)
goto out;
if (rtd->dai_link->ops && 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 (i = 0; i < rtd->num_codecs; i++) {
struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
struct snd_pcm_hw_params codec_params;
/* copy params for each codec */
codec_params = *params;
/* fixup params based on TDM slot masks */
if (codec_dai->tx_mask)
soc_pcm_codec_params_fixup(&codec_params,
codec_dai->tx_mask);
if (codec_dai->rx_mask)
soc_pcm_codec_params_fixup(&codec_params,
codec_dai->rx_mask);
ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
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));
}
ret = soc_dai_hw_params(substream, params, cpu_dai);
if (ret < 0)
goto interface_err;
if (platform->driver->ops && platform->driver->ops->hw_params) {
ret = platform->driver->ops->hw_params(substream, params);
if (ret < 0) {
dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
platform->component.name, ret);
goto platform_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));
out:
mutex_unlock(&rtd->pcm_mutex);
return ret;
platform_err:
if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
interface_err:
i = rtd->num_codecs;
codec_err:
while (--i >= 0) {
struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
codec_dai->driver->ops->hw_free(substream, codec_dai);
codec_dai->rate = 0;
}
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
mutex_unlock(&rtd->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_platform *platform = rtd->platform;
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->pcm_mutex, rtd->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 (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->active == 1) {
codec_dai->rate = 0;
codec_dai->channels = 0;
codec_dai->sample_bits = 0;
}
}
/* apply codec digital mute */
for (i = 0; i < rtd->num_codecs; i++) {
if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
(!playback && rtd->codec_dais[i]->capture_active == 1))
snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
substream->stream);
}
/* free any machine hw params */
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
/* free any DMA resources */
if (platform->driver->ops && platform->driver->ops->hw_free)
platform->driver->ops->hw_free(substream);
/* now free hw params for the DAIs */
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
codec_dai->driver->ops->hw_free(substream, codec_dai);
}
if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
mutex_unlock(&rtd->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_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret;
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
ret = codec_dai->driver->ops->trigger(substream,
cmd, codec_dai);
if (ret < 0)
return ret;
}
}
if (platform->driver->ops && platform->driver->ops->trigger) {
ret = platform->driver->ops->trigger(substream, cmd);
if (ret < 0)
return ret;
}
if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
if (ret < 0)
return ret;
}
if (rtd->dai_link->ops && 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_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i, ret;
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops &&
codec_dai->driver->ops->bespoke_trigger) {
ret = codec_dai->driver->ops->bespoke_trigger(substream,
cmd, codec_dai);
if (ret < 0)
return ret;
}
}
if (platform->driver->bespoke_trigger) {
ret = platform->driver->bespoke_trigger(substream, cmd);
if (ret < 0)
return ret;
}
if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
if (ret < 0)
return ret;
}
return 0;
}
/*
* soc level wrapper for pointer callback
* If cpu_dai, codec_dai, platform driver has the delay callback, than
* 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_platform *platform = rtd->platform;
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;
if (platform->driver->ops && platform->driver->ops->pointer)
offset = platform->driver->ops->pointer(substream);
if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
codec_delay = max(codec_delay,
codec_dai->driver->ops->delay(substream,
codec_dai));
}
delay += codec_delay;
/*
* None of the existing platform drivers implement delay(), so
* for now the codec_dai of first multicodec entry is used
*/
if (platform->driver->delay)
delay += platform->driver->delay(substream, rtd->codec_dais[0]);
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;
/* only add new dpcms */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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;
list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
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
if (fe->debugfs_dpcm_root)
dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
fe->debugfs_dpcm_root, &dpcm->state);
#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);
list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
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;
list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
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(dpcm->debugfs_state);
#endif
list_del(&dpcm->list_be);
list_del(&dpcm->list_fe);
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;
int i, j;
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
for (i = 0; i < card->num_links; i++) {
be = &card->rtd[i];
if (!be->dai_link->no_pcm)
continue;
if (be->cpu_dai->playback_widget == widget)
return be;
for (j = 0; j < be->num_codecs; j++) {
struct snd_soc_dai *dai = be->codec_dais[j];
if (dai->playback_widget == widget)
return be;
}
}
} else {
for (i = 0; i < card->num_links; i++) {
be = &card->rtd[i];
if (!be->dai_link->no_pcm)
continue;
if (be->cpu_dai->capture_widget == widget)
return be;
for (j = 0; j < be->num_codecs; j++) {
struct snd_soc_dai *dai = be->codec_dais[j];
if (dai->capture_widget == widget)
return be;
}
}
}
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;
}
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;
struct snd_soc_dapm_widget_list *list;
int paths;
list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
if (list == NULL)
return -ENOMEM;
/* get number of valid DAI paths and their widgets */
paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
stream ? "capture" : "playback");
*list_ = list;
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;
int prune = 0;
/* Destroy any old FE <--> BE connections */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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 (i = 0; i < dpcm->be->num_codecs; i++) {
struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
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;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
dpcm->be->dpcm[stream].runtime_update =
SND_SOC_DPCM_UPDATE_NO;
}
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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 */
list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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,
u64 formats)
{
runtime->hw.rate_min = stream->rate_min;
runtime->hw.rate_max = stream->rate_max;
runtime->hw.channels_min = stream->channels_min;
runtime->hw.channels_max = stream->channels_max;
if (runtime->hw.formats)
runtime->hw.formats &= formats & stream->formats;
else
runtime->hw.formats = formats & stream->formats;
runtime->hw.rates = stream->rates;
}
static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *fe = substream->private_data;
struct snd_soc_dpcm *dpcm;
u64 formats = ULLONG_MAX;
int stream = substream->stream;
if (!fe->dai_link->dpcm_merged_format)
return formats;
/*
* It returns merged BE codec format
* if FE want to use it (= dpcm_merged_format)
*/
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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 (i = 0; i < be->num_codecs; i++) {
codec_dai_drv = be->codec_dais[i]->driver;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
else
codec_stream = &codec_dai_drv->capture;
formats &= codec_stream->formats;
}
}
return formats;
}
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;
u64 format = dpcm_runtime_base_format(substream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
else
dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
}
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_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);
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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))
continue;
dev_dbg(be->dev, "ASoC: close BE %s\n",
dpcm->fe->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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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))
continue;
dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
dpcm->fe->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;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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 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",
dpcm->fe->dai_link->name);
/* 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;
}
}
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 */
list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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->fe->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;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
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;
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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))
continue;
dev_dbg(be->dev, "ASoC: prepare BE %s\n",
dpcm->fe->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 soc_pcm_ioctl(struct snd_pcm_substream *substream,
unsigned int cmd, void *arg)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
if (platform->driver->ops && platform->driver->ops->ioctl)
return platform->driver->ops->ioctl(substream, cmd, arg);
return snd_pcm_lib_ioctl(substream, cmd, arg);
}
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;
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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;
}
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;
}
/* 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)
{
int i, old, new, paths;
mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_dapm_widget_list *list;
struct snd_soc_pcm_runtime *fe = &card->rtd[i];
/* make sure link is FE */
if (!fe->dai_link->dynamic)
continue;
/* only check active links */
if (!fe->cpu_dai->active)
continue;
/* DAPM sync will call this to update DSP paths */
dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
fe->dai_link->name);
/* skip if FE doesn't have playback capability */
if (!fe->cpu_dai->driver->playback.channels_min
|| !fe->codec_dai->driver->playback.channels_min)
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");
mutex_unlock(&card->mutex);
return paths;
}
/* update any new playback paths */
new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
if (new) {
dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
}
/* update any old playback paths */
old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
if (old) {
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 (!fe->cpu_dai->driver->capture.channels_min
|| !fe->codec_dai->driver->capture.channels_min)
continue;
/* skip if FE isn't currently capturing */
if (!fe->cpu_dai->capture_active
|| !fe->codec_dai->capture_active)
continue;
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");
mutex_unlock(&card->mutex);
return paths;
}
/* update any new capture paths */
new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
if (new) {
dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
}
/* update any old capture paths */
old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
if (old) {
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);
}
mutex_unlock(&card->mutex);
return 0;
}
int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
{
struct snd_soc_dpcm *dpcm;
struct list_head *clients =
&fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
list_for_each_entry(dpcm, clients, list_be) {
struct snd_soc_pcm_runtime *be = dpcm->be;
int i;
if (be->dai_link->ignore_suspend)
continue;
for (i = 0; i < be->num_codecs; i++) {
struct snd_soc_dai *dai = be->codec_dais[i];
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
}
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 */
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
dpcm_be_disconnect(fe, stream);
fe->dpcm[stream].runtime = NULL;
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_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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 {
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->playback.channels_min)
playback = 1;
if (codec_dai->driver->capture.channels_min)
capture = 1;
}
capture = capture && cpu_dai->driver->capture.channels_min;
playback = playback && cpu_dai->driver->playback.channels_min;
}
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->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 */
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) {
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 = soc_pcm_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 = soc_pcm_ioctl;
}
if (platform->driver->ops) {
rtd->ops.ack = platform->driver->ops->ack;
rtd->ops.copy = platform->driver->ops->copy;
rtd->ops.silence = platform->driver->ops->silence;
rtd->ops.page = platform->driver->ops->page;
rtd->ops.mmap = platform->driver->ops->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);
if (platform->driver->pcm_new) {
ret = platform->driver->pcm_new(rtd);
if (ret < 0) {
dev_err(platform->dev,
"ASoC: pcm constructor failed: %d\n",
ret);
return ret;
}
}
pcm->private_free = platform->driver->pcm_free;
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;
list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
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)
return 0;
}
/* it's safe to free/stop this BE DAI */
return 1;
}
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;
list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
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)
return 0;
}
/* it's safe to change hw_params */
return 1;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_platform *platform)
{
if (platform->driver->ops && platform->driver->ops->trigger)
return platform->driver->ops->trigger(substream, cmd);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
#ifdef CONFIG_DEBUG_FS
static 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;
/* 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;
}
list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
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));
}
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 (fe->cpu_dai->driver->playback.channels_min)
offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
buf + offset, out_count - offset);
if (fe->cpu_dai->driver->capture.channels_min)
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->card->debugfs_card_root)
return;
rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
rtd->card->debugfs_card_root);
if (!rtd->debugfs_dpcm_root) {
dev_dbg(rtd->dev,
"ASoC: Failed to create dpcm debugfs directory %s\n",
rtd->dai_link->name);
return;
}
rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
rtd->debugfs_dpcm_root,
rtd, &dpcm_state_fops);
}
#endif
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