Messages in this thread | | | Date | Fri, 6 Feb 2015 13:19:17 +0800 | Subject | Re: [PATCH] dma: mmp-tdma: refine dma disable and dma-pos update | From | Zhangfei Gao <> |
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On 5 February 2015 at 20:54, Qiao Zhou <zhouqiao@marvell.com> 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. > > Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Thanks
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