openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ASoC: omap-pcm: Fix the no period wakeup implementation 

After omap_request_dma the BLOCK_IRQ is enabled as default
configuration for the channel.
If we are requested for no period wakeup, we need to disable
the BLOCK_IRQ in order to not receive any interrupts.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2011-10-04 11:09:52 +03:00 committed by Mark Brown
parent 9cd113261b
commit b1b6cffeb7
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sound/soc/omap/omap-pcm.c
View File

@ -198,6 +198,14 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
OMAP_DMA_LAST_IRQ | OMAP_DMA_BLOCK_IRQ);
else if (!substream->runtime->no_period_wakeup)
omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ);
else {
/*
* No period wakeup:
* we need to disable BLOCK_IRQ, which is enabled by the omap
* dma core at request dma time.
*/
omap_disable_dma_irq(prtd->dma_ch, OMAP_DMA_BLOCK_IRQ);
}
if (!(cpu_class_is_omap1())) {
omap_set_dma_src_burst_mode(prtd->dma_ch,