ASoC: DaVinci: pcm, fix underrun by using sram

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Fix underruns by using dma to copy 1st to sram
in a ping/pong buffer style and then copying from
the sram to the ASP. This also has the advantage
of tolerating very long interrupt latency on dma
completion.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

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Troy Kisky 2009-11-18 17:49:53 -07:00 • committed by Mark Brown

parent 1587ea3157

commit 1e224f322b

4 changed files with 481 additions and 44 deletions

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2

arch/arm/mach-davinci/include/mach/asp.h

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7

sound/soc/davinci/davinci-i2s.c

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515

sound/soc/davinci/davinci-pcm.c

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1

sound/soc/davinci/davinci-pcm.h

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