diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2012-09-24 10:58:04 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-09-24 18:35:29 +0200 |
| commit | e7736cdea223f3a5b867c359fb35cf08250dd771 (patch) | |
| tree | 9ec9873c35e67cd5389202cddc3157ca06e631f3 | |
| parent | 9d069dc00b02b886abe3cab5e369140f7cd78965 (diff) | |
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>
| -rw-r--r-- | include/linux/dmaengine.h | 3 | ||||
| -rw-r--r-- | sound/soc/soc-dmaengine-pcm.c | 6 |
2 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 09da4e56529..d3201e438d1 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -653,7 +653,8 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_rio_sg( static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic( struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, - size_t period_len, enum dma_transfer_direction dir) + size_t period_len, enum dma_transfer_direction dir, + unsigned long flags) { return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len, period_len, dir, flags, NULL); diff --git a/sound/soc/soc-dmaengine-pcm.c b/sound/soc/soc-dmaengine-pcm.c index 5df529eda25..bbc125748a3 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; |