[PATCH 0/8] drm/sun4i: Support the Display Engine frontend

Maxime Ripard maxime.ripard at free-electrons.com
Thu Dec 14 08:35:39 UTC 2017

Hi Thomas,

On Wed, Dec 13, 2017 at 05:16:22PM +0100, Thomas van Kleef wrote:
> Hi,
> On 13-12-17 16:33, Maxime Ripard wrote:
> > Hi,
> > 
> > This is a first serie to enable the display engine frontend.
> > 
> > This hardware block is found in the first generation Display Engine from
> > Allwinner. Its role is to implement more advanced features that the
> > associated backend, even though the backend alone can be used (and was used
> > so far) for basic composition.
> > 
> > Among those features, we will find hardware scaling, that is supported in
> > this serie, colorspace conversions, or more exotic formats support such as
> > the one output by the VPU.
> So, if I have read the code correctly. The frontend will be used whenever the
> input size differs from the output size.

Yes :)

My current plan is to extend it as needed when we'll need to deal with
a format not supported by the backend (for the VPU), or anything the
backend cannot support.


Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
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