[PATCH 03/11] ASoC: omap-pcm: Select sDMA synchronization based on packet_size

Peter Ujfalusi
2012-09-12T11:46:54Z

Since we only have element or packet synchronization we can use the
dma_data->packet_size to select the desired mode:
if packet_size is 0 we use ELEMENT mode
if packet_size is not 0 we use PACKET mode for sDMA synchronization.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
sound/soc/omap/omap-pcm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
index f0feb06..02eeb2e 100644
--- a/sound/soc/omap/omap-pcm.c
+++ b/sound/soc/omap/omap-pcm.c
@@ -165,7 +165,12 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
memset(&dma_params, 0, sizeof(dma_params));
dma_params.data_type = dma_data->data_type;
dma_params.trigger = dma_data->dma_req;
- dma_params.sync_mode = dma_data->sync_mode;
+
+ if (dma_data->packet_size)
+ dma_params.sync_mode = OMAP_DMA_SYNC_PACKET;
+ else
+ dma_params.sync_mode = OMAP_DMA_SYNC_ELEMENT;
+
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dma_params.src_amode = OMAP_DMA_AMODE_POST_INC;
dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT;
--
1.7.12