[alsa-devel] [PATCH 15/19] ASoC: Intel: mfld-pcm: add control for powering up/down dsp

[Vinod Koul]

When we have PCM (FE/BE) opened or DAPM widgets triggered we need power up/down
DSP accordingly. The DSP will do ref count of these requests i.e. link these
runtime_get/put calls of DSP

Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 sound/soc/intel/sst-mfld-platform-pcm.c |   14 ++++++++++++++
 sound/soc/intel/sst-mfld-platform.h     |    1 +
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/sound/soc/intel/sst-mfld-platform-pcm.c b/sound/soc/intel/sst-mfld-platform-pcm.c
index 0fbb688..346f972 100644
--- a/sound/soc/intel/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/sst-mfld-platform-pcm.c
@@ -292,6 +292,16 @@ static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 	return ret_val;
 
 }
+
+static inline int power_up_sst(struct sst_runtime_stream *sst)
+{
+	return sst->ops->power(true);
+}
+
+static inline int power_down_sst(struct sst_runtime_stream *sst)
+{
+	return sst->ops->power(false);
+}
 /* end -- helper functions */
 
 static int sst_media_open(struct snd_pcm_substream *substream,
@@ -323,6 +333,8 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 	/* allocate memory for SST API set */
 	runtime->private_data = stream;
 
+	power_up_sst(stream);
+
 	/* Make sure, that the period size is always even */
 	snd_pcm_hw_constraint_step(substream->runtime, 0,
 			   SNDRV_PCM_HW_PARAM_PERIODS, 2);
@@ -342,6 +354,8 @@ static void sst_media_close(struct snd_pcm_substream *substream,
 	int ret_val = 0, str_id;
 
 	stream = substream->runtime->private_data;
+	power_down_sst(stream);
+
 	str_id = stream->stream_info.str_id;
 	if (str_id)
 		ret_val = stream->ops->close(str_id);
diff --git a/sound/soc/intel/sst-mfld-platform.h b/sound/soc/intel/sst-mfld-platform.h
index 5cfe947..4acdd32 100644
--- a/sound/soc/intel/sst-mfld-platform.h
+++ b/sound/soc/intel/sst-mfld-platform.h
@@ -134,6 +134,7 @@ struct sst_ops {
 	int (*device_control) (int cmd, void *arg);
 	int (*set_generic_params) (enum sst_controls cmd, void *arg);
 	int (*close) (unsigned int str_id);
+	int (*power) (bool state);
 };
 
 struct sst_runtime_stream {
-- 
1.7.0.4