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From:   Karol Herbst <kherbst@redhat.com>
Date:   Wed, 1 Jul 2020 13:24:00 +0200
Message-ID: <CACO55tvT0fOMai7k7oAP1TL42YAuMwJocxk2seNgjYibs+h5oA@mail.gmail.com>
Subject: Re: [git pull] drm for 5.8-rc1
To:     James Jones <jajones@nvidia.com>
Cc:     "Kirill A. Shutemov" <kirill@shutemov.name>,
        Ben Skeggs <bskeggs@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Daniel Vetter <daniel.vetter@ffwll.ch>
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On Wed, Jul 1, 2020 at 6:45 AM James Jones <jajones@nvidia.com> wrote:
>
> This implies something is trying to use one of the old
> DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK format modifiers with DRM-KMS without
> first checking whether it is supported by the kernel.  I had tried to
> force an Xorg+Mesa stack without my userspace patches to hit this error
> when testing, but must have missed some permutation.  If the stalled
> Mesa patches go in, this would stop happening of course, but those were
> held up for a long time in review, and are now waiting on me to make
> some modifications.
>

that's completely irrelevant. If a kernel change breaks userspace,
it's a kernel bug.

> Are you using the modesetting driver in X?  If so, with glamor I
> presume?  What version of Mesa?  Any distro patches?  Any non-default
> xorg.conf options that would affect modesetting, your X driver if it
> isn't modesetting, or glamour?
>
> Thanks,
> -James
>
> On 6/30/20 4:08 PM, Kirill A. Shutemov wrote:
> > On Tue, Jun 02, 2020 at 04:06:32PM +1000, Dave Airlie wrote:
> >> James Jones (4):
> > ...
> >>        drm/nouveau/kms: Support NVIDIA format modifiers
> >
> > This commit is the first one that breaks Xorg startup for my setup:
> > GTX 1080 + Dell UP2414Q (4K DP MST monitor).
> >
> > I believe this is the crucial part of dmesg (full dmesg is attached):
> >
> > [   29.997140] [drm:nouveau_framebuffer_new] Unsupported modifier: 0x300000000000014
> > [   29.997143] [drm:drm_internal_framebuffer_create] could not create framebuffer
> > [   29.997145] [drm:drm_ioctl] pid=3393, ret = -22
> >
> > Any suggestions?
> >
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