Re: [PATCH 1/3] drm/i915: Don't set mode_config's cursor size

[Damien Lespiau <damien.lespiau@intel.com>]

On Tue, Mar 25, 2014 at 04:38:24PM +0000, Chris Wilson wrote:
> For the record,
> 
> 16:30 < agd5f> ickle, our GPUs don't have selectable cursor sizes
> 16:31 < agd5f> so on the newer ones, xf86-video-modesetting, etc. would
> allocate a 64x64 cursor and it would look squashed and funky since the
> hw expects 128x128
> 
> Which means I was confused when I thought part of the reasoning was
> indeed HiDPI support. (I'm still seem to remember that was part of the
> argument for large cursors anyway.)
> 
> > Are you saying the Intel DDX currently derives a different meaning to
> > the intented behaviour? in which case it can still be changed to not do
> > that?
> 
> I still disagree though. This provides all the information I need to
> support variable sized cursors and we can use large cursors today.

I'd love the game to be about defining clear semantics more than "by
interpreting that value this way, I got what I always wanted" :)

We can resolve that today with MAX_CURSOR_WIDTH, MAX_CURSOR_HEIGHT caps
as well (if you're alluding at the fact that drm_planes may still be a
few decades away).

We'll still need to expose the full list of supported cursor sizes for
compositors at some point or another, my preferred way would be with a
property in the exposed cursor drm_plane.

-- 
Damien