Messages in this thread | | | From | Baolin Wang <> | Date | Tue, 17 Apr 2018 14:06:54 +0800 | Subject | Re: [PATCH 4/5] dmaengine: sprd: Add Spreadtrum DMA configuration |
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On 16 April 2018 at 23:35, Vinod Koul <vinod.koul@intel.com> wrote: > On Mon, Apr 16, 2018 at 02:32:05PM +0800, Baolin Wang wrote: > >> >> Beside the general configuration, our audio driver will configure the >> >> fragment length, block length, maybe transaction length, and they must >> >> specify the request type and interrupt type, these are what we want to >> >> export for users. >> > >> > As I said before, you need to derive fragment, block or transaction from >> >> I am sorry I did not make things clear here. What I mean is not only >> link list mode(prep_cyclic), but also other modes (prep_slave, >> prep_interleaved ...), users still need to configure the fragment >> length, block length or transaction length according to their >> requirements. > > Other modes are similar, they also use the parameters programmed from > dma_slave_config. Pls see other driver examples. IIRC dw dma has > similar capabilities but not all are exposed to user and driver configures.
I'll check the dw dma. Really thanks for your help :)
-- Baolin.wang Best Regards
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