[PATCH v4 2/8] drm/atomic: Add support for mouse hotspots

[Zack Rusin]

On Wed, 2023-06-28 at 14:15 +0000, Simon Ser wrote:
> I think we should drop the CRTC_X/CRTC_Y properties for hotspot-aware cursor
> planes.
> The drivers aren't going to do anything with these, and exposing them to user-
> space
> makes it sound like user-space controls the position of the plane, but it really
> doesn't.

I think we talked about this before. The CRTC_X/CRTC_Y properties are absolutely
being used and they're respected when the rendering is done guest-side - the system
will be pretty broken if the client sets the crtc x/y properties to somewhere where
the mouse isn't though.

An argument could be made that crtc x/y properties should be removed on the cursor
plane in drivers for para-virtualized hardware and instead replaced with
mouse_position x/y properties that do exactly what crtc x/y properties do but make
it explicit what they really are on a cursor plane.

z