From: Vinod Koul vinod.koul@intel.com
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@intel.com Signed-off-by: Subhransu S. Prusty subhransu.s.prusty@intel.com --- sound/soc/intel/sst-mfld-platform-pcm.c | 14 ++++++++++++++ sound/soc/intel/sst-mfld-platform.h | 1 + 2 files changed, 15 insertions(+)
diff --git a/sound/soc/intel/sst-mfld-platform-pcm.c b/sound/soc/intel/sst-mfld-platform-pcm.c index eed4d2f080f6..2fb079c6a931 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 7526ac1b5cd7..6f476d586b66 100644 --- a/sound/soc/intel/sst-mfld-platform.h +++ b/sound/soc/intel/sst-mfld-platform.h @@ -133,6 +133,7 @@ struct sst_ops { int (*device_control) (int cmd, void *arg); int (*send_byte_stream)(void *arg); int (*close) (unsigned int str_id); + int (*power)(bool state); };
struct sst_runtime_stream {