On Fri, Jun 12, 2020 at 03:37:51PM +0800, Shengjiu Wang wrote: > With EDMA, there is two dma channels can be used for dev_to_dev, > one is from ASRC, one is from another peripheral (ESAI or SAI). > > If we select the dma channel of ASRC, there is an issue for ideal > ratio case, the speed of copy data is faster than sample > frequency, because ASRC output data is very fast in ideal ratio > mode. > > So it is reasonable to use the dma channel of Back-End peripheral. > then copying speed of DMA is controlled by data consumption > speed in the peripheral FIFO, > > Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx> Reviewed-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx>
