Messages in this thread | | | Date | Mon, 16 Apr 2018 21:05:01 +0530 | From | Vinod Koul <> | Subject | Re: [PATCH 4/5] dmaengine: sprd: Add Spreadtrum DMA configuration |
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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.
-- ~Vinod
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