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

[Chen-Yu Tsai]

On Mon, Oct 13, 2025 at 3:23 AM Jernej Skrabec <jernej.skrabec at gmail.com> 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 at gmail.com>

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