Re: [git pull] drm for 5.8-rc1

[Karol Herbst <kherbst@redhat.com>]

On Wed, Aug 12, 2020 at 5:20 PM Karol Herbst <kherbst@redhat.com> wrote:
>
> On Wed, Aug 12, 2020 at 5:05 PM Thierry Reding <thierry.reding@gmail.com> wrote:
> >
> > On Wed, Aug 12, 2020 at 12:43:17PM +0200, Karol Herbst wrote:
> > > On Wed, Aug 12, 2020 at 12:27 PM Karol Herbst <kherbst@redhat.com> wrote:
> > > >
> > > > On Wed, Aug 12, 2020 at 2:19 AM James Jones <jajones@nvidia.com> wrote:
> > > > >
> > > > > Sorry for the slow reply here as well.  I've been in the process of
> > > > > rebasing and reworking the userspace patches.  I'm not clear my changes
> > > > > will address the Jetson Nano issue, but if you'd like to try them, the
> > > > > latest userspace changes are available here:
> > > > >
> > > > >    https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3724
> > > > >
> > > > > And the tegra-drm kernel patches are here:
> > > > >
> > > > >
> > > > > https://patchwork.ozlabs.org/project/linux-tegra/patch/20191217005205.2573-1-jajones@nvidia.com/
> > > > >
> > > > > Those + the kernel changes addressed in this thread are everything I had
> > > > > outstanding.
> > > > >
> > > >
> > > > I don't know if that's caused by your changes or not, but now the
> > > > assert I hit is a different one pointing out that
> > > > nvc0_miptree_select_best_modifier fails in a certain case and returns
> > > > MOD_INVALID... anyway, it seems like with your patches applied it's
> > > > now way easier to debug and figure out what's going wrong, so maybe I
> > > > can figure it out now :)
> > > >
> > >
> > > collected some information which might help to track it down.
> > >
> > > src/gallium/frontends/dri/dri2.c:648 is the assert hit: assert(*zsbuf)
> > >
> > > templ is {reference = {count = 0}, width0 = 300, height0 = 300, depth0
> > > = 1, array_size = 1, format = PIPE_FORMAT_Z24X8_UNORM, target =
> > > PIPE_TEXTURE_2D, last_level = 0, nr_samples = 0, nr_storage_samples =
> > > 0, usage = 0, bind = 1, flags = 0, next = 0x0, screen = 0x0}
> > >
> > > inside tegra_screen_resource_create modifier says
> > > DRM_FORMAT_MOD_INVALID as template->bind is 1
> > >
> > > and nvc0_miptree_select_best_modifier returns DRM_FORMAT_MOD_INVALID,
> > > so the call just returns NULL leading to the assert.
> > >
> > > Btw, this is on Xorg-1.20.8-1.fc32.aarch64 with glxgears.
> >
> > Hi Karol,
> >
> > I'm not sure if I'm doing something wrong, but I can't seem to reproduce
> > these assertions at all. I've got a debug Mesa build from today as well
> > as an X server build from today and if I run glxgears it works just fine
> > for me. This is on Jetson TX1, but I don't think there's any difference
> > to Jetson Nano in that regard. I'll try to give this a try on Jetson
> > Nano as well, just to make sure. I can also try to pull in James'
> > patches to see if they change anything for me.
> >
> > However, perhaps we can compare notes on what exactly your configuration
> > is so that perhaps I can reproduce and take a closer look at what's
> > going on.
> >
> > My Mesa build uses the following configuration:
> >
> >     $ meson --prefix /usr --libexecdir /usr/lib --buildtype debug -Dgles1=false \
> >         -Dgallium-drivers=nouveau,swrast,tegra -Dgallium-opencl=standalone \
> >         -Dvulkan-drivers='' -Dplatforms=wayland,x11,drm,surfaceless \
> >         -Dbuild-tests=true -Dtexture-float=true -Ddri-drivers='' \
> >         -Dgallium-omx=disabled -Dllvm=true
> >
> > And here's what I use for X:
> >
> >     $ meson --prefix /usr --libexecdir /usr/lib \
> >         --libexecdir /usr/lib/xorg-server -Dxdmcp=false
> >
> > I've stripped out some cross-compilation boilerplate there because that
> > shouldn't be relevant. Do you see anything in there that I'm missing and
> > which might be causing the issue not to happen for me?
> >
> > Also, what's the window manager that you use? I use TWM (for simplicity)
> > and I suspect that's not what you use, so perhaps this is relevant
> > somehow as well?
> >
>
> I don't use any at all, just plain X.
>
> Anyway, for software versions:
> kernel-5.8.0 + patch James refered to above
> Xorg-1.20.8-1.fc32.aarch64 (just the normal fc32 build)
>
> mesa fedora, master or james modifier branch (james' branch is hitting
> a different assert, so maybe that could behave differently for you as
> well)
> but my meson args are those: -Dplatforms=auto -Dllvm=false
> -Dgallium-drivers="nouveau, tegra" -Dbuildtype=debug
>
> But I am seeing a bunch of messages in dmesg in a release build as well:
> [  233.080649] nouveau 57000000.gpu: gr: DATA_ERROR 00000003
> [INVALID_OPERATION] ch 4 [0400323000 glxgears[412]] subc 0 class b197
> mthd 19d0 data 0000003d
> [  233.094237] nouveau 57000000.gpu: gr: DATA_ERROR 0000009c [] ch 4
> [0400323000 glxgears[412]] subc 0 class b197 mthd 0d78 data 00000052
> [  233.106327] nouveau 57000000.gpu: gr: DATA_ERROR 0000009c [] ch 4
> [0400323000 glxgears[412]] subc 0 class b197 mthd 0d78 data 00000050
>
> But at the moment I kind of expect Xorg to be the difference. I will
> try with Xorg from git and see if it goes away.

yeah... Xorg from git doesn't cause the errors/asserts.

So.. what do we want to do?

>
> > Thierry

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