Re: [PATCH 0/6] dmaengine: Add common dma_slave_config and split it into src and dst parts

[Vinod Koul]

On 14-01-26, 12:12, Frank Li wrote:
> Many DMA engine drivers store a dma_slave_config per channel. Propagate
> this configuration into struct dma_chan to avoid duplicating the same
> code in each driver.
> 
> Much of dma_slave_config is identical for source and destination. Split
> the configuration into src and dst groups and use a union to preserve
> backward compatibility. This reduces the need for drivers to repeatedly
> check the DMA transfer direction.

The reason why we had both the src/dstn sides was intended method to
allow upport ofr device to device dma. Some interest was shown for that
at that time.
I dont think we have such a user even now...


-- 
~Vinod