On Mon, 10 Aug 2009 10:50:04 +0200 Janusz Krzysztofik <jkrzyszt@xxxxxxxxxxxx> wrote: > Use newly implemented DMA channel self linking on OMAP1510 like on other OMAP > models. Remove unnecessary DMA transfer restart from interrupt handler > routine. > > The interrupt routine used to maintain a period index, originally needed for > counting up periods up to a full buffer in order to restart the DMA transfer. > For some time, this counter is also used as a replacement for hardware DMA > progress counter that has been found unusable on OMAP1510 in case of playback. > Thus, the period index calculation cannot be omitted completely. However, the > accuracy of this counter can still suffer from missing DMA interrupts. > > In order to work correctly, it requires patch 1 from this series also applied: > [RFC][PATCH 1/3] ARM: OMAP: DMA: Add support for DMA channel self linking on OMAP1510 > > Created against linux-2.6.31-rc5. > > Tested on Amstrad Delta. > > Signed-off-by: Janusz Krzysztofik <jkrzyszt@xxxxxxxxxxxx> > Nice to see code to be more uniform across the OMAP's. Note this depends on patch 1 which touches the arch/arm/plat-omap/dma.c. Acked-by: Jarkko Nikula <jhnikula@xxxxxxxxx> _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
