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

[Uwe Sauter]

Am 03.03.21 um 14:12 schrieb Ilia Mirkin:
> On Wed, Mar 3, 2021 at 7:41 AM Alex Riesen <alexander.riesen at cetitec.com> wrote:
>>
>> Ilia Mirkin, Sat, Feb 27, 2021 22:26:57 +0100:
>>> Can you try Alex's patch to modetest and confirm that you see issues
>>> with modetest? If so, can you (and maybe Alex as well) try an older
>>> kernel (I'm on 5.6) and see if modetest behaves well there. [The patch
>>> in question was to expose 256x256 as the 'preferred' size, but support
>>> for the larger cursors has been around for a while.] Alex - if you
>>> have time, same question to you.
>>
>> Sorry that it took so long. I retestet with the same kernel as Uwe did
>> (5.4.101) and my results are the same: modetest with 64 and 128 cursors looks
>> good, 256 broken. Didn't test with X this time (this being my main office
>> machine), but can do later if required.
> 
> Thanks for confirming! No need to test X - that will work fine, since
> we were reporting the smaller cursors on that kernel.
> 
> So I think we have definitive evidence that at least all Kepler
> doesn't do 256x256 (and it's not just some bug in the display macro
> rework that got introduced). And unless I'm blind and don't see the
> corruption, Pascal seems fine. Question remains for Maxwell1/2 GPUs.
> Unless someone has immediate plans to test on those, I'd recommend
> bumping the minimum for 256x256 being reported to Pascal, and doing
> 128x128 for Kepler / Maxwell.

The only older model I have access to would be a 6600GT (NV43). Don't know if this would have any
significance…

	Uwe


> Simon, Lyude -- thoughts?
> 
> Cheers,
> 
>   -ilia
>