Hi Robert, I tested your patches on exynos5420 peach-pit with audio playback and got some underrun error. I posted a similar patch in the below link. https://patchwork.kernel.org/patch/5384551/ Please do review the same. Thanks Padma > On 25.11.2014 13:25, Robert Baldyga wrote: >> This patch adds possibility to read residue of DMA transfer. It's useful >> when we want to know how many bytes have been transfered before we >> terminate channel. It can take place, for example, on timeout interrupt. >> >> Signed-off-by: Lukasz Czerwinski <l.czerwinski@xxxxxxxxxxx> >> Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx> >> --- >> drivers/dma/pl330.c | 61 >> ++++++++++++++++++++++++++++++++++++++++++++++++++++- >> 1 file changed, 60 insertions(+), 1 deletion(-) >> -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html