[alsa-devel] [PATCH 2/2] ASoC: OMAP: reconfigure DMA to resume audio

[Jane Wang]

Reconfigure DMA transfer parameters to resume audio after system comming out of OFF state.

Signed-off-by: Jane Wang <jwang at ti.com>
---
 sound/soc/omap/omap-pcm.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
index 6a829ee..5e04390 100644
--- a/sound/soc/omap/omap-pcm.c
+++ b/sound/soc/omap/omap-pcm.c
@@ -215,8 +215,13 @@ static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 
 	spin_lock_irqsave(&prtd->lock, flags);
 	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
+		/* Reconfigure DMA transfer parameters
+		 * in order to come back from OFF mode
+		 */
+		omap_pcm_prepare(substream);
+		/* fall through */
+	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		prtd->period_index = 0;
 		/* Configure McBSP internal buffer usage */
-- 
1.5.4.3