[RFC 0/8] rmk's Dove DRM/TDA19988 Cubox driver

[Alex Deucher]

On Mon, May 20, 2013 at 4:15 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Mon, May 20, 2013 at 09:36:02AM -0400, Alex Deucher wrote:
>> You can tell the xserver what size cursor you support when you call
>> xf86_cursors_init() in the ddx.  Just expose a 32x64 or 64x32 ARGB
>> cursor.  Most apps don't use a 64x64 cursor anyway.  I've used
>> hardware with non-64x64 cursors and haven't run into any problems yet.
>
> I guess the xf86 backend will fall back to software cursors if it gets
> a cursor larger than the hardware supports, so maybe 64x32 will be
> fine.
>
> However, my comments concerning the less-than-64x64 size come from
> David Airlie who said "X and userside programs expect 64x64 to work.
> so its possibly pointless supporting anything less, as in you'd write
> code but nobody would end up using it".
>
> Note also that the generic DRM KMS code assumes cursor support at
> 64x64, and there's no generic way for a driver at present (that I know
> of) to inform it of anything different.

It shouldn't be too hard to add a new cap for querying the cursor size
to the drm cap interface.

Alex