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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2012-09-24 10:58:04 +0300
committerTakashi Iwai <tiwai@suse.de>2012-09-24 18:35:29 +0200
commite7736cdea223f3a5b867c359fb35cf08250dd771 (patch)
tree9ec9873c35e67cd5389202cddc3157ca06e631f3 /sound
parent9d069dc00b02b886abe3cab5e369140f7cd78965 (diff)
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dmaengine: Add flags parameter to dmaengine_prep_dma_cyclic()
With this parameter added to dmaengine_prep_dma_cyclic() the API will be in sync with other dmaengine_prep_*() functions. The dmaengine_prep_dma_cyclic() function primarily used by audio for cyclic transfer required by ALSA, we use the from audio to ask dma drivers to suppress interrupts (if DMA_PREP_INTERRUPT is cleared) when it is supported on the platform. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> CC: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-dmaengine-pcm.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/soc/soc-dmaengine-pcm.c b/sound/soc/soc-dmaengine-pcm.c
index 5df529eda251..bbc125748a38 100644
--- a/sound/soc/soc-dmaengine-pcm.c
+++ b/sound/soc/soc-dmaengine-pcm.c
@@ -140,14 +140,18 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
struct dma_chan *chan = prtd->dma_chan;
struct dma_async_tx_descriptor *desc;
enum dma_transfer_direction direction;
+ unsigned long flags = DMA_CTRL_ACK;
direction = snd_pcm_substream_to_dma_direction(substream);
+ if (!substream->runtime->no_period_wakeup)
+ flags |= DMA_PREP_INTERRUPT;
+
prtd->pos = 0;
desc = dmaengine_prep_dma_cyclic(chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
- snd_pcm_lib_period_bytes(substream), direction);
+ snd_pcm_lib_period_bytes(substream), direction, flags);
if (!desc)
return -ENOMEM;