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ASoC: OMAP: Use McBSP threshold to playback and capture

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This patch changes the way DMA is done in omap-pcm.c
in order to reduce power consumption. There is no need
to have so much SW control in order to have DMA in idle
state during audio streaming. Configuring McBSP threshold value
and DMA to FRAME_SYNC are sufficient.

Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Eduardo Valentin
2009-08-20 16:18:25 +03:00
committed by Mark Brown
parent ca6e2ce086
commit caebc0cb3b
3 changed files with 50 additions and 8 deletions
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2
sound/soc/omap/omap-pcm.h
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@ -29,6 +29,8 @@ struct omap_pcm_dma_data {
char *name; /* stream identifier */
int dma_req; /* DMA request line */
unsigned long port_addr; /* transmit/receive register */
int sync_mode; /* DMA sync mode */
void (*set_threshold)(struct snd_pcm_substream *substream);
};
extern struct snd_soc_platform omap_soc_platform;