From: Rander Wang rander.wang@linux.intel.com
The existing code does not expose a prepare operation, which is very much needed to deal with underflow and resume operations.
Signed-off-by: Rander Wang rander.wang@linux.intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- drivers/soundwire/intel.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index adf06833af74..510b7f51826b 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -698,6 +698,21 @@ static int intel_hw_params(struct snd_pcm_substream *substream, return ret; }
+static int intel_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct sdw_cdns_dma_data *dma; + + dma = snd_soc_dai_get_dma_data(dai, substream); + if (!dma) { + dev_err(dai->dev, "failed to get dma data in %s", + __func__); + return -EIO; + } + + return sdw_prepare_stream(dma->stream); +} + static int intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -744,6 +759,7 @@ static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai,
static const struct snd_soc_dai_ops intel_pcm_dai_ops = { .hw_params = intel_hw_params, + .prepare = intel_prepare, .hw_free = intel_hw_free, .shutdown = intel_shutdown, .set_sdw_stream = intel_pcm_set_sdw_stream, @@ -751,6 +767,7 @@ static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
static const struct snd_soc_dai_ops intel_pdm_dai_ops = { .hw_params = intel_hw_params, + .prepare = intel_prepare, .hw_free = intel_hw_free, .shutdown = intel_shutdown, .set_sdw_stream = intel_pdm_set_sdw_stream,