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Merge remote-tracking branch 'asoc/topic/symmetry' into asoc-fsl

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This commit is contained in:
Mark Brown 2013-12-03 14:58:07 +00:00
parent 2924a99810 62e5f676f6
commit e73462f573
3 changed files with 138 additions and 28 deletions
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6
include/sound/soc-dai.h
View file

@ -220,6 +220,8 @@ struct snd_soc_dai_driver {
struct snd_soc_pcm_stream capture;
struct snd_soc_pcm_stream playback;
unsigned int symmetric_rates:1;
unsigned int symmetric_channels:1;
unsigned int symmetric_samplebits:1;
/* probe ordering - for components with runtime dependencies */
int probe_order;
@ -244,6 +246,8 @@ struct snd_soc_dai {
unsigned int capture_active:1; /* stream is in use */
unsigned int playback_active:1; /* stream is in use */
unsigned int symmetric_rates:1;
unsigned int symmetric_channels:1;
unsigned int symmetric_samplebits:1;
struct snd_pcm_runtime *runtime;
unsigned int active;
unsigned char probed:1;
@ -258,6 +262,8 @@ struct snd_soc_dai {
/* Symmetry data - only valid if symmetry is being enforced */
unsigned int rate;
unsigned int channels;
unsigned int sample_bits;
/* parent platform/codec */
struct snd_soc_platform *platform;

2
include/sound/soc.h
View file

@ -879,6 +879,8 @@ struct snd_soc_dai_link {
/* Symmetry requirements */
unsigned int symmetric_rates:1;
unsigned int symmetric_channels:1;
unsigned int symmetric_samplebits:1;
/* Do not create a PCM for this DAI link (Backend link) */
unsigned int no_pcm:1;

158
sound/soc/soc-pcm.c
View file

@ -84,35 +84,117 @@ static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int ret;
if (!soc_dai->driver->symmetric_rates &&
!rtd->dai_link->symmetric_rates)
return 0;
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);
/* This can happen if multiple streams are starting simultaneously -
* the second can need to get its constraints before the first has
* picked a rate. Complain and allow the application to carry on.
*/
if (!soc_dai->rate) {
dev_warn(soc_dai->dev,
"ASoC: Not enforcing symmetric_rates due to race\n");
return 0;
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;
}
}
dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", soc_dai->rate);
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_RATE,
soc_dai->rate, soc_dai->rate);
if (ret < 0) {
dev_err(soc_dai->dev,
"ASoC: Unable to apply rate symmetry constraint: %d\n",
ret);
return ret;
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;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
unsigned int rate, channels, sample_bits, symmetry;
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 ||
codec_dai->driver->symmetric_rates ||
rtd->dai_link->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 ||
codec_dai->driver->symmetric_channels ||
rtd->dai_link->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 ||
codec_dai->driver->symmetric_samplebits ||
rtd->dai_link->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_driver *codec_driver = rtd->codec_dai->driver;
struct snd_soc_dai_link *link = rtd->dai_link;
return cpu_driver->symmetric_rates || codec_driver->symmetric_rates ||
link->symmetric_rates || cpu_driver->symmetric_channels ||
codec_driver->symmetric_channels || link->symmetric_channels ||
cpu_driver->symmetric_samplebits ||
codec_driver->symmetric_samplebits ||
link->symmetric_samplebits;
}
/*
* List of sample sizes that might go over the bus for parameter
* application. There ought to be a wildcard sample size for things
@ -242,6 +324,9 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
&cpu_dai_drv->capture);
}
if (soc_pcm_has_symmetry(substream))
runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
ret = -EINVAL;
snd_pcm_limit_hw_rates(runtime);
if (!runtime->hw.rates) {
@ -383,13 +468,6 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
codec_dai->active--;
codec->active--;
/* clear the corresponding DAIs rate when inactive */
if (!cpu_dai->active)
cpu_dai->rate = 0;
if (!codec_dai->active)
codec_dai->rate = 0;
/* Muting the DAC suppresses artifacts caused during digital
* shutdown, for example from stopping clocks.
*/
@ -525,6 +603,10 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
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) {
@ -561,9 +643,16 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
}
}
/* store the rate for each DAIs */
/* 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));
codec_dai->rate = params_rate(params);
codec_dai->channels = params_channels(params);
codec_dai->sample_bits =
snd_pcm_format_physical_width(params_format(params));
out:
mutex_unlock(&rtd->pcm_mutex);
@ -598,6 +687,19 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
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;
}
if (codec_dai->active == 1) {
codec_dai->rate = 0;
codec_dai->channels = 0;
codec_dai->sample_bits = 0;
}
/* apply codec digital mute */
if (!codec->active)
snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);