12 Jun
2020
12 Jun
'20
10:10 a.m.
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@nxp.com
Reviewed-by: Nicolin Chen nicoleotsuka@gmail.com