Re: [PATCH v2 1/1] dmaengine: dw: Program xBAR hardware for Elkhart Lake

On Thu, Jun 24, 2021 at 04:46:32PM +0530, Vinod Koul wrote:

On 14-06-21, 16:30, Andy Shevchenko wrote:

quoted

Intel Elkhart Lake PSE DMA implementation is integrated with crossbar IP
in order to serve more hardware than there are DMA request lines available.

Due to this, program xBAR hardware to make flexible support of PSE peripheral.

The Device-to-Device has not been tested and it's not supported by DMA Engine,
but it's left in the code for the sake of documenting hardware features.

Kernel does not like to keep dead code, please remove this. It can be
added back when we have users

I would rather keep it as documentation (converted to comment perhaps).
In any case, it seems the suitable point of time to contribute will be
already after v5.14-rc1.

-- 
With Best Regards,
Andy Shevchenko