[PATCH] Documentation: dmaengine: Add a documentation for the dma controller API

[Vinod Koul]

On Wed, Jul 30, 2014 at 06:03:13PM +0200, Maxime Ripard wrote:
> The dmaengine is neither trivial nor properly documented at the moment, which
> means a lot of trial and error development, which is not that good for such a
> central piece of the system.
> 
> Attempt at making such a documentation.

Did you miss Documentation/dmaengine.txt, lots of this is already covered
there. But yes i would be really glad to know what isnt, so that we can fix
that.

> +  * device_slave_caps
> +    - Isn't that redundant with the cap_mask already?
> +    - Only a few drivers seem to implement it
For audio to know what your channel can do rather than hardcoding it

> +
> +  * dma cookies?
cookie is dma transaction representation which is monotonically incrementing
number.

-- 
~Vinod