Re: [RESEND PATCH] dmaengine: bcm2835: Fix cyclic DMA period splitting
From: Vinod Koul
Date: Tue Feb 21 2017 - 21:41:05 EST
On Mon, Feb 20, 2017 at 08:01:16PM +0100, Matthias Reichl wrote:
> The code responsible for splitting periods into chunks that
> can be handled by the DMA controller missed to update total_len,
> the number of bytes processed in the current period, when there
> are more chunks to follow.
> Therefore total_len was stuck at 0 and the code didn't work at all.
> This resulted in a wrong control block layout and audio issues because
> the cyclic DMA callback wasn't executing on period boundaries.
> Fix this by adding the missing total_len update.