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@xxxxxxxxx>
---
sound/soc/codecs/tlv320dac33.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 7d01759..6edad36 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -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;
@@ -725,6 +726,31 @@ 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)
@@ -1372,6 +1398,8 @@ 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,
--
1.7.0.4
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