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

From: Uwe Sauter <uwe.sauter.de@gmail.com>
To: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: Alex Riesen <alexander.riesen@cetitec.com>,
	nouveau <nouveau@lists.freedesktop.org>,
	Simon Ser <contact@emersion.fr>
Subject: Re: [Nouveau] [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace
Date: Wed, 3 Mar 2021 18:02:37 +0100	[thread overview]
Message-ID: <c0cb8898-e395-99a4-c93a-a3e2f1442305@gmail.com> (raw)
In-Reply-To: <CAKb7UviXJp30K5VBdNS_THru8Er-p4OHKad4Oxuxm8Pdck_yRQ@mail.gmail.com>

Am 03.03.21 um 14:33 schrieb Ilia Mirkin:
> On Wed, Mar 3, 2021 at 8:25 AM Uwe Sauter <uwe.sauter.de@gmail.com> wrote:
>>
>> Am 03.03.21 um 14:12 schrieb Ilia Mirkin:
>>> On Wed, Mar 3, 2021 at 7:41 AM Alex Riesen <alexander.riesen@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…
> 
> Nope, we want newer :) Maxwell came after Kepler. GTX 750 for Maxwell
> 1, and GTX 9xx for Maxwell 2. (GM10x and GM20x).

I managed to get access to two much newer cards, RTK 1070 and the like.

Should I test these or is it not necessary?

Regards,

	Uwe

> Cheers,
> 
>   -ilia
> 

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