Re: [PATCH 4/5] add cursor hotspot to drm_framebuffer

[Ville Syrjälä]

On Tue, May 31, 2016 at 03:09:13PM +0200, Gerd Hoffmann wrote:
> On Di, 2016-05-31 at 15:36 +0300, Ville Syrjälä wrote:
> 
> > Why store it in the fb and not eg. the plane state?
> 
> Well, drm_plane_state is allocated by drm_atomic_helper_update_plane.
> 
> When sticking the hotspot into the the plane state we have to add hot_x
> and hot_y parameters to drm_plane_funcs->update_plane() and cause quite
> some churn all over the drm tree.
> 
> Or create a separate code path for cursor updates which uses a special
> drm_atomic_helper_update_plane version, which doesn't look very
> attractive too due to code duplication.
> 
> Sticking it into the drm_framebuffer instead looks like a reasonable
> alternative.
> 
> I'm open to better suggestions.

Hmm. Too many layers. I guess this is the easiest solution then. I was
hoping to avoid fattening the fb for something so rarely used, but I
guess there's no sane way to achieve that.

-- 
Ville Syrjälä
Intel OTC