Commit 27b198f4 authored by Rander Wang's avatar Rander Wang Committed by Vinod Koul
Browse files

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: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: default avatarRander Wang <rander.wang@linux.intel.com>
Acked-by: default avatarSanyog Kale <sanyog.r.kale@intel.com>
Link: https://lore.kernel.org/r/20200215014740.27580-3-pierre-louis.bossart@linux.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 2523486b

drivers/soundwire/intel.c

+17 −0
Original line number Diff line number Diff line
@@ -699,6 +699,21 @@ 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)

{
@@ -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,