[RFC] Plane color pipeline KMS uAPI

[Simon Ser]

On Thursday, May 11th, 2023 at 18:56, Joshua Ashton <joshua at froggi.es> wrote:

> When we are talking about being 'prescriptive' in the API, are we
> outright saying we don't want to support arbitrary 3D LUTs, or are we
> just offering certain algorithms to be 'executed' for a plane/crtc/etc
> in the atomic API? I am confused...

>From a kernel PoV:

- Prescriptive = here are the available hardware blocks, feel free to
  configure each as you like
- Descriptive = give me the source and destination color-spaces and I
  take care of everything

This proposal is a prescriptive API. We haven't explored _that_ much
how a descriptive API would look like, probably it can include some way
to do Night Light and similar features but not sure how high-level
they'd look like. A descriptive API is inherently more restrictive than
a prescriptive API.