On Fri, Mar 26, 2021 at 04:37:52PM -0400, Lyude Paul wrote:
> This is something that we've wanted for a while now: the ability to
> actually look up the respective drm_device for a given drm_dp_aux struct.
> This will also allow us to transition over to using the drm_dbg_*() helpers
> for debug message printing, as we'll finally have a drm_device to reference
> for doing so.
> 
> Note that there is one limitation with this - because some DP AUX adapters
> exist as platform devices which are initialized independently of their
> respective DRM devices, one cannot rely on drm_dp_aux->drm_dev to always be
> non-NULL until drm_dp_aux_register() has been called. We make sure to point
> this out in the documentation for struct drm_dp_aux.
> 
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
[...]
>  drivers/gpu/drm/tegra/dpaux.c                            | 1 +
[...]

Acked-by: Thierry Reding <treding@nvidia.com>