Re: [PATCH] dma: sun4i: expose block size and wait cycle configuration to DMA users

Boris Brezillon
2016-03-09T11:23:51Z

On Tue, 8 Mar 2016 08:25:47 +0530
Vinod Koul <vinod.koul@intel.com> wrote:
>
> Why does dmaengine need to wait? Can you explain that

I don't have an answer for that one, but when I set WAIT_CYCLES to 1
for the NAND use case it does not work. So I guess it is somehow
related to how the DRQ line is controlled on the device side...

--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering