[PATCH v2 4/4] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_rgb565()

[Daniel Latypov]

On Sun, Jul 17, 2022 at 10:01 AM José Expósito
<jose.exposito89 at gmail.com> wrote:
>
> José Expósito <jose.exposito89 at gmail.com> wrote:
> > I already fixed the warning and added the reviewed by tags, however, I
> > noticed that rebasing the series on the latest drm-misc-next show this
> > error:
> > [...]
>
> Sorry for the extra email. I forgot to mention that the error is only
> present in UML. Running in other architectures works as expected.
> Tested on x86_64 and PowerPC.

Can you take a look at the raw output?

It would be .kunit/test.log (or replace .kunit with w/e --build_dir
you're using).
You could also run the test with --raw_output to have kunit.py print
that out instead.
We might want to compare the output on UML vs x86 and see what looks suspicious.

These errors
  [ERROR] Test: xrgb8888_to_rgb332_test: missing subtest result line!
means that kunit.py can't parse the KTAP output.

It could be that the output is mangled for some reason.
I recall running into a UML-specific issue with output mangling on an
old kernel fork. I doubt it's related to this one, but it shows that
it's possible there could be something going on.

-Daniel