ASoC: OMAP: Set minimum buffer size constraint for McBSP2 in OMAP3

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McBSP2 in OMAP3 has 1 ksample (1k x 32 bit) internal FIFO. During
initial playback startup, this FIFO is keeping the DMA request active
until the FIFO is full.

So now if ALSA buffer size is smaller, DMA is looping around it while
filling up the HW FIFO, generating burst of interrupts as well and SW
doesn't have any change to fill enough data.

Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

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Jarkko Nikula 2009-03-27 15:32:01 +02:00 • committed by Mark Brown

parent 7220b9f4bd

commit 6984992bf0

1 changed files with 11 additions and 0 deletions

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sound/soc/omap/omap-mcbsp.c

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