ASoC: Intel: Skylake: Add MCLK configuration

The SoC has MCLK output which is typically required by codecs.
The MCLK is controlled by DSP FW, so driver can configure that by
sending DMA_CONTROL IPC. The configuration for MCLK is present
in the endpoint blob.

So if block has this configuration, send IPC to DSP for MCLK
configuration. This is done by new function skl_dsp_set_dma_control()
which is invoked by BE prepare.

Signed-off-by: Dharageswari R <dharageswari.r@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index cc9a5599ab9d..092450ac1c78 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -206,6 +206,23 @@ static int skl_get_format(struct snd_pcm_substream *substream,
 	return format_val;
 }
 
+static int skl_be_prepare(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct skl *skl = get_skl_ctx(dai->dev);
+	struct skl_sst *ctx = skl->skl_sst;
+	struct skl_module_cfg *mconfig;
+
+	if ((dai->playback_active > 1) || (dai->capture_active > 1))
+		return 0;
+
+	mconfig = skl_tplg_be_get_cpr_module(dai, substream->stream);
+	if (mconfig == NULL)
+		return -EINVAL;
+
+	return skl_dsp_set_dma_control(ctx, mconfig);
+}
+
 static int skl_pcm_prepare(struct snd_pcm_substream *substream,
 		struct snd_soc_dai *dai)
 {
@@ -588,6 +605,7 @@ static struct snd_soc_dai_ops skl_dmic_dai_ops = {
 
 static struct snd_soc_dai_ops skl_be_ssp_dai_ops = {
 	.hw_params = skl_be_hw_params,
+	.prepare = skl_be_prepare,
 };
 
 static struct snd_soc_dai_ops skl_link_dai_ops = {