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soundwire: intel: add prepare support in sdw dai driver

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The existing code does not expose a prepare operation, which is very
much needed to deal with underflow and resume operations.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Rander Wang <rander.wang@linux.intel.com>
Acked-by: Sanyog Kale <sanyog.r.kale@intel.com>
Link: https://lore.kernel.org/r/20200215014740.27580-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Rander Wang 2020-02-14 19:47:37 -06:00 committed by Vinod Koul
parent 2523486b98
commit 27b198f409
1 changed files with 17 additions and 0 deletions
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17
drivers/soundwire/intel.c
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@ -699,6 +699,21 @@ error:
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)
{
@ -745,6 +760,7 @@ 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,
@ -752,6 +768,7 @@ 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,