[igt-dev] [PATCH] RFC: Make igts for cross-driver stuff mandatory?

[Alex Deucher]

On Fri, Oct 19, 2018 at 4:51 AM Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
>
> Hi all,
>
> This is just to collect feedback on this idea, and see whether the
> overall dri-devel community stands on all this. I think the past few
> cross-vendor uapi extensions all came with igts attached, and
> personally I think there's lots of value in having them: A
> cross-vendor interface isn't useful if every driver implements it
> slightly differently.
>
> I think there's 2 questions here:
>
> - Do we want to make such testcases mandatory?
>
> - If yes, are we there yet, or is there something crucially missing
>   still?
>
> And of course there's a bunch of details to figure out. Like we
> probably want to also recommend the selftests/unit-tests in
> drivers/gpu/drm/selftest, since fairly often that's a much more
> effective approach to checking the details than from userspace.
>
> Feedback and thoughts very much appreciated.

As long as we can fix up any cross platform issues, this seems reasonable to me.

Alex

>
> Cheers, Daniel
> ---
>  Documentation/gpu/drm-uapi.rst | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
> index 4b4bf2c5eac5..91cf6e4b6303 100644
> --- a/Documentation/gpu/drm-uapi.rst
> +++ b/Documentation/gpu/drm-uapi.rst
> @@ -238,6 +238,13 @@ DRM specific patterns. Note that ENOTTY has the slightly unintuitive meaning of
>  Testing and validation
>  ======================
>
> +Testing Requirements for userspace API
> +--------------------------------------
> +
> +New cross-driver userspace interface extensions, like new IOCTL, new KMS
> +properties, new files in sysfs or anything else that constitutes an API change
> +need to have driver-agnostic testcases in IGT for that feature.
> +
>  Validating changes with IGT
>  ---------------------------
>
> --
> 2.19.1
>
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