@@ -99,6 +99,7 @@ struct hsw_pcm_data {
struct snd_compr_stream *cstream;
unsigned int wpos;
struct mutex mutex;
+ bool allocated;
};
/* private data for the driver */
@@ -113,6 +114,8 @@ struct hsw_priv_data {
struct hsw_pcm_data pcm[HSW_PCM_COUNT];
};
+static u32 hsw_notify_pointer(struct sst_hsw_stream *stream, void *data);
+
static inline u32 hsw_mixer_to_ipc(unsigned int value)
{
if (value >= ARRAY_SIZE(volume_map))
@@ -322,6 +325,29 @@ static int hsw_pcm_hw_params(struct snd_pcm_substream *substream,
u8 channels;
int ret;
+ /* check if we are being called a subsequent time */
+ if (pcm_data->allocated) {
+ ret = sst_hsw_stream_reset(hsw, pcm_data->stream);
+ if (ret < 0)
+ dev_dbg(rtd->dev, "error: reset stream failed %d\n",
+ ret);
+
+ ret = sst_hsw_stream_free(hsw, pcm_data->stream);
+ if (ret < 0) {
+ dev_dbg(rtd->dev, "error: free stream failed %d\n",
+ ret);
+ return ret;
+ }
+ pcm_data->allocated = false;
+
+ pcm_data->stream = sst_hsw_stream_new(hsw, rtd->cpu_dai->id,
+ hsw_notify_pointer, pcm_data);
+ if (pcm_data->stream == NULL) {
+ dev_err(rtd->dev, "error: failed to create stream\n");
+ return -EINVAL;
+ }
+ }
+
/* stream direction */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
path_id = SST_HSW_STREAM_PATH_SSP0_OUT;
@@ -475,6 +501,7 @@ static int hsw_pcm_hw_params(struct snd_pcm_substream *substream,
dev_err(rtd->dev, "error: failed to commit stream %d\n", ret);
return ret;
}
+ pcm_data->allocated = true;
ret = sst_hsw_stream_pause(hsw, pcm_data->stream, 1);
if (ret < 0)
@@ -607,6 +634,7 @@ static int hsw_pcm_close(struct snd_pcm_substream *substream)
dev_dbg(rtd->dev, "error: free stream failed %d\n", ret);
goto out;
}
+ pcm_data->allocated = 0;
pcm_data->stream = NULL;
out:
hw_params() can be called multiple times. Make sure we release the DSP stream that was allocated on previous hw_params() calls before allocating a new DSP stream. Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com> --- sound/soc/intel/sst-haswell-pcm.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)