Re: [RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps

[Rahul Navale]

From: Rahul Navale <rahul.navale@xxxxxxx>

Hi Folker,

>Just to double check, and to make sure the regression you're seeing is
>not a combination of any additional, yet unknown side-effects, could you
>perform one more test?
>In dmaengine_pcm_pointer() (the function we just patched), could you
>replace the call to snd_dmaengine_pcm_pointer() with
>snd_dmaengine_pcm_pointer_no_residue() while keeping 7e01511443c3 active
>and test if this fixes your issue or not?

I have performed the test (replace the call in dmaengine_pcm_pointer()
function of provided patch) while keeping 7e01511443c3 active.
I see issue is fixed audio is working with this.

Hi Marek,

>I came to the same conclusion, that the residue handling is broken in
>the xilinx DMA driver for cyclic transfers, and the fix is below, with
>two extra fixes in top:

I have tested the provided patches the audio is not fixed with this.