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| author | Rander Wang <rander.wang@linux.intel.com> | 2020-02-14 19:47:37 -0600 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-02-18 14:09:51 +0530 |
| commit | 27b198f409d876c3445d7c811609801939a04b0b (patch) | |
| tree | d25bd60416baa75940d7aae69645ef1d89589c9d /drivers/soundwire | |
| parent | 2523486b9860ba6bda6b0ae277d288ef94c0d374 (diff) | |
| download | linux-27b198f409d876c3445d7c811609801939a04b0b.tar.bz2 | |
soundwire: intel: add prepare support in sdw dai driver
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>
Diffstat (limited to 'drivers/soundwire')
| -rw-r--r-- | drivers/soundwire/intel.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 78b2ebf0119c..bad7c30f1e01 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -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, |