Re: [PATCH] dma: mmp-tdma: refine dma disable and dma-pos update
From: Vinod Koul
Date: Mon Feb 23 2015 - 06:25:57 EST
On Thu, Feb 05, 2015 at 08:54:19PM +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.
This fails to apply for me, care to rebase pls
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