[PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace

[Alex Riesen]

Ilia Mirkin, Wed, Feb 24, 2021 17:57:41 +0100:
> On Wed, Feb 24, 2021 at 11:53 AM Alex Riesen <alexander.riesen at cetitec.com> wrote:
> > Ilia Mirkin, Wed, Feb 24, 2021 17:48:39 +0100:
> > > Just to be crystal clear -- are you saying that 128x128 works or does
> > > not work? (You said "yes", which would imply it works OK, but then you
> > > said both cases, which would imply doesn't work since 256x256 doesn't
> > > work?)
> >
> > Modetest with 128x128 cursor works. Without damage to the cursor: modetest
> > shows normal cursor in vanilla v5.11. Modetest also shows normal cursor in
> > vanilla v5.11 with the commit reverted.
> 
> But modetest with 256x256 doesn't work (correctly) right? Or did I
> misunderstand?

Right. That's why I was asking if I did everything right: it was just corrupted
in both kernels.

> All the patch does is allow those large cursors to be used, which gets
> reported via drm APIs and modesetting picks the largest cursor
> available. (And actually I think it's even not required to use the
> large cursors, it just controls what's reported in the defaults to
> userspace.)

Maybe something in X code is not prepared to handle the kernel reporting
large cursor support? Even though 128x128 is pretty large, and I don't think
I even use that large cursors in X configuration. How can I check?