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ASoC: tlv320dac33: Manage a pointer for snd_pcm_substream in private structure 

As a preparation for supporting codec to be turned off,
when we are in BIAS_STANDBY.

The substream must be easily available in other places than
pcm_* callbacks.

Manage a pointer in _startup, and _shutdown for this.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Peter Ujfalusi 2010-04-30 14:59:35 +03:00 committed by Liam Girdwood
parent 239fe55c7f
commit 0b61d2b9f2
1 changed files with 28 additions and 0 deletions
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28
sound/soc/codecs/tlv320dac33.c
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@ -91,6 +91,7 @@ struct tlv320dac33_priv {
struct work_struct work;
struct snd_soc_codec codec;
struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
struct snd_pcm_substream *substream;
int power_gpio;
int chip_power;
int irq;
@ -720,6 +721,31 @@ static void dac33_oscwait(struct snd_soc_codec *codec)
"internal oscillator calibration failed\n");
}
static int dac33_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
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 tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
/* Stream started, save the substream pointer */
dac33->substream = substream;
return 0;
}
static void dac33_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
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 tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
dac33->substream = NULL;
}
static int dac33_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@ -1367,6 +1393,8 @@ EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
#define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE
static struct snd_soc_dai_ops dac33_dai_ops = {
.startup = dac33_startup,
.shutdown = dac33_shutdown,
.hw_params = dac33_hw_params,
.prepare = dac33_pcm_prepare,
.trigger = dac33_pcm_trigger,