ASoC: OMAP: Enhance OMAP1510 DMA progress software counter
Enhance period_index accuracy, particularly just before buffer rewind, by making use of DMA interrupt status flags in addition to simply counting up interrupts. Created against linux-2.6.31-rc5. Tested on Amstrad Delta. Signed-off-by: NJanusz Krzysztofik <jkrzyszt@tis.icnet.pl> Acked-by: NJarkko Nikula <jhnikula@gmail.com> Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
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