linux-kernel - Re: Kunit drm_test_check_plane_state: EXPECTATION FAILED at drivers/gpu/drm/tests/drm_plane_helper

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Date:   Tue, 5 Dec 2023 12:46:12 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Dan Carpenter <dan.carpenter@...aro.org>
Cc:     Jessica Zhang <quic_jesszhan@...cinc.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, lkft-triage@...ts.linaro.org,
        regressions@...ts.linux.dev, davidgow@...gle.com,
        maarten.lankhorst@...ux.intel.com, tzimmermann@...e.de,
        airlied@...il.com, daniel@...ll.ch,
        Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: Kunit drm_test_check_plane_state: EXPECTATION FAILED at
 drivers/gpu/drm/tests/drm_plane_helper_test.c:123

On Tue, Dec 05, 2023 at 12:05:02PM +0300, Dan Carpenter wrote:
> On Tue, Dec 05, 2023 at 09:37:05AM +0100, Maxime Ripard wrote:
> > Hi Naresh,
> > 
> > Thanks for the report
> > 
> > On Mon, Dec 04, 2023 at 11:05:36PM +0530, Naresh Kamboju wrote:
> > > The Kunit drm_plane_helper failed on all devices running Linux next-20231204
> > > 
> > > ## Test Regressions (compared to next-20231201)
> > > * qemu-armv7, kunit and
> > > * x86, kunit
> > >   - drm_test_check_invalid_plane_state_downscaling_invalid
> > >   - drm_test_check_invalid_plane_state_drm_plane_helper
> > >   - drm_test_check_invalid_plane_state_drm_test_check_invalid_plane_state
> > >   - drm_test_check_invalid_plane_state_positioning_invalid
> > >   - drm_test_check_invalid_plane_state_upscaling_invalid
> > >   - drm_test_check_plane_state_clipping_rotate_reflect
> > >   - drm_test_check_plane_state_clipping_simple
> > >   - drm_test_check_plane_state_downscaling
> > >   - drm_test_check_plane_state_drm_test_check_plane_state
> > >   - drm_test_check_plane_state_positioning_simple
> > >   - drm_test_check_plane_state_rounding1
> > >   - drm_test_check_plane_state_rounding2
> > >   - drm_test_check_plane_state_rounding3
> > >   - drm_test_check_plane_state_rounding4
> > >   - drm_test_check_plane_state_upscaling
> > 
> > I found the source of failure to be f1e75da5364e ("drm/atomic: Loosen FB
> > atomic checks").
> > 
> > Fortunately for us, it's already been reverted yesterday for some
> > unrelated reason, so it should be fixed in next-20231205 onward.
> 
> Sorry, that's a bummer that these patches were reverted.  :(  The whole
> episode was a bit unfortunate...
> 
> Qualcom has been working on those patches for a year.  They must not be
> using kunit testing as part of their QC...  It's some kind of
> communication failure on our part.

That's definitely a communication failure, but that's mostly on us :)

The reason these patches were reverted was completely unrelated to the
kunit failures here: it failed the basic requirement we have on
intel-gpu-tools tests and open-source userspace examples for new uAPIs.

So whether or not kunit tests would have passed, these patches were
applied due to inattention and would have been reverted anyway

Maxime

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