Messages in this thread | | | Date | Fri, 12 Jun 2020 01:10:00 -0700 | From | Nicolin Chen <> | Subject | Re: [RFC PATCH v3 4/4] ASoC: fsl_asrc_dma: Fix data copying speed issue with EDMA |
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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>
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