[PATCH v2 01/20] drm/atomic: Handle max bpc properties before connector state allocation

[Dmitry Baryshkov]

On Fri, Oct 09, 2026 at 11:15:53AM +0800, Xilin Wu wrote:
> Allow drivers to attach the max bpc property before allocating connector
> state, as needed by the upcoming non-HDMI bridge connector support.
> Only update the current state when one exists.
> 
> Initialize max_requested_bpc and max_bpc from the attached property default
> when creating connector state. Use drm_object_property_get_default_value()
> rather than the range maximum so that state creation and subsequent resets
> restore the value chosen when attaching the property.
> 
> Cover deferred allocation, existing state and restoration of a default
> that differs from the range maximum in the connector KUnit tests.
> 
> Assisted-by: LLM
> Signed-off-by: Xilin Wu <sophon at radxa.com>
> ---
>  drivers/gpu/drm/drm_atomic_state_helper.c  |  8 +++++
>  drivers/gpu/drm/drm_connector.c            |  6 ++--
>  drivers/gpu/drm/tests/drm_connector_test.c | 53 ++++++++++++++++++++++++++++++
>  3 files changed, 65 insertions(+), 2 deletions(-)
> 

I'd very much prefer if instead non-HDMI bridge chains followed the HDMI
approach, making the state available.

-- 
With best wishes
Dmitry