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 | 16 ++++++++++++++++ sound/soc/intel/sst-mfld-platform.h | 1 + 2 files changed, 17 insertions(+)
diff --git a/sound/soc/intel/sst-mfld-platform-pcm.c b/sound/soc/intel/sst-mfld-platform-pcm.c index 9906b7c..6f5edd6 100644 --- a/sound/soc/intel/sst-mfld-platform-pcm.c +++ b/sound/soc/intel/sst-mfld-platform-pcm.c @@ -322,6 +322,16 @@ static int sst_platform_init_stream(struct snd_pcm_substream *substream)
}
+static int power_up_sst(struct sst_runtime_stream *stream) +{ + return stream->ops->power(sst->dev, true); +} + +static void power_down_sst(struct sst_runtime_stream *stream) +{ + stream->ops->power(sst->dev, false); +} + static int sst_media_open(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -351,6 +361,10 @@ static int sst_media_open(struct snd_pcm_substream *substream, /* allocate memory for SST API set */ runtime->private_data = stream;
+ ret_val = power_up_sst(stream); + if (ret_val < 0) + return ret_val; + /* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2); @@ -370,6 +384,8 @@ 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(sst->dev, str_id); diff --git a/sound/soc/intel/sst-mfld-platform.h b/sound/soc/intel/sst-mfld-platform.h index 7092ee3..bf2b6d4 100644 --- a/sound/soc/intel/sst-mfld-platform.h +++ b/sound/soc/intel/sst-mfld-platform.h @@ -129,6 +129,7 @@ struct sst_ops { int (*stream_read_tstamp) (struct device *dev, struct pcm_stream_info *str_info); int (*send_byte_stream)(struct device *dev, struct snd_sst_bytes_v2 *bytes); int (*close) (struct device *dev, unsigned int str_id); + int (*power)(struct device *dev, bool state); };
struct sst_runtime_stream {