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ASoC: TWL4030: Add constrains for second stream

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In case of duplex mode (capture and playback at the same time), the second
stream has to have the same parameters (rate, sample size) as the already
running stream.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2009-03-27 10:39:08 +02:00 committed by Mark Brown
parent 31ad0f31c3
commit 7220b9f4bd
1 changed files with 54 additions and 0 deletions
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54
sound/soc/codecs/twl4030.c
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@ -122,6 +122,9 @@ struct twl4030_priv {
unsigned int bypass_state;
unsigned int codec_powered;
unsigned int codec_muted;
struct snd_pcm_substream *master_substream;
struct snd_pcm_substream *slave_substream;
};
/*
@ -1217,6 +1220,50 @@ static int twl4030_set_bias_level(struct snd_soc_codec *codec,
return 0;
}
static int twl4030_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->codec;
struct twl4030_priv *twl4030 = codec->private_data;
/* If we already have a playback or capture going then constrain
* this substream to match it.
*/
if (twl4030->master_substream) {
struct snd_pcm_runtime *master_runtime;
master_runtime = twl4030->master_substream->runtime;
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE,
master_runtime->rate,
master_runtime->rate);
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
master_runtime->sample_bits,
master_runtime->sample_bits);
twl4030->slave_substream = substream;
} else
twl4030->master_substream = substream;
return 0;
}
static void twl4030_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->codec;
struct twl4030_priv *twl4030 = codec->private_data;
if (twl4030->master_substream == substream)
twl4030->master_substream = twl4030->slave_substream;
twl4030->slave_substream = NULL;
}
static int twl4030_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@ -1224,8 +1271,13 @@ static int twl4030_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct twl4030_priv *twl4030 = codec->private_data;
u8 mode, old_mode, format, old_format;
if (substream == twl4030->slave_substream)
/* Ignoring hw_params for slave substream */
return 0;
/* bit rate */
old_mode = twl4030_read_reg_cache(codec,
TWL4030_REG_CODEC_MODE) & ~TWL4030_CODECPDZ;
@ -1384,6 +1436,8 @@ static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai,
#define TWL4030_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE)
static struct snd_soc_dai_ops twl4030_dai_ops = {
.startup = twl4030_startup,
.shutdown = twl4030_shutdown,
.hw_params = twl4030_hw_params,
.set_sysclk = twl4030_set_dai_sysclk,
.set_fmt = twl4030_set_dai_fmt,