On Tue, Mar 03, 2015 at 09:16:08AM +0800, Qiao Zhou wrote: > Below are the refinements. > 1. Set DMA abort bit when disabling dma channel. This will clear > the remaining data in dma FIFO, to fix channel-swap issue. > 2. Read DMA HW pointer when updating DMA status. Previously dma > position is calculated by adding one period size in dma interrupt. > This is inaccurate/insufficient for some high-quality audio APP. > Since interrupt bottom half handler has variable schedule delay, > it causes big error when calculating sample delay. Read the actual > HW pointer and feedback can improve the accuracy. > 3. Do some minor code clean. Applied, thanks -- ~Vinod -- 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
