Re: [PATCH v3] dmaengine: imx-sdma: Add FIFO stride support for multi FIFO script
From: Vinod Koul
Date: Wed Jul 06 2022 - 02:00:58 EST
On 21-06-22, 11:36, Shengjiu Wang wrote:
> The peripheral may have several FIFOs, but some case just select
> some FIFOs from them for data transfer, which means FIFO0 and FIFO2
> may be selected. So add FIFO address stride support, 0 means all FIFOs
> are continuous, 1 means 1 word stride between FIFOs. All stride between
> FIFOs should be same.
>
> Another option words_per_fifo means how many audio channel data copied
> to one FIFO one time, 1 means one channel per FIFO, 2 means 2 channels
> per FIFO.
>
> If 'n_fifos_src = 4' and 'words_per_fifo = 2', it means the first two
> words(channels) fetch from FIFO0 and then jump to FIFO1 for next two words,
> and so on after the last FIFO3 fetched, roll back to FIFO0.
this fails to apply for me, pls rebase on dmaengine/next and revise
--
~Vinod