Re: [PATCH 07/30] drm/sun4i: Move blender config from layers to mixer

On Mon, Oct 13, 2025 at 3:23 AM Jernej Skrabec [off-list ref] wrote:

With upcoming DE33 support, layer management must be decoupled from
other operations like blender configuration. There are two reasons:
- DE33 will have separate driver for planes and thus it will be harder
  to manage different register spaces

So if I understand correctly:

- the "layer" is from DMA up to CSC, which is the last stage before routing
- in DE30 and before, routing was limited to within one mixer
- in DE33 and onward, routing is global

- Architecturaly it's better to split access by modules. Blender is now
  exclusively managed by mixer.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Reviewed-by: Chen-Yu Tsai <wens@kernel.org>