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ASoC: Intel: Fix allow hw_params to be called more than once.

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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>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Liam Girdwood 2014-05-02 16:56:32 +01:00 committed by Mark Brown
parent 10df350977
commit 916152c488
1 changed files with 28 additions and 0 deletions
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28
sound/soc/intel/sst-haswell-pcm.c
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@ -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: