[PATCH v14 13/28] drm/connector: hdmi: Add custom hook to filter TMDS character rate

[Dmitry Baryshkov]

On Tue, May 21, 2024 at 12:13:46PM +0200, Maxime Ripard wrote:
> Most of the HDMI controllers have an upper TMDS character rate limit
> they can't exceed. On "embedded"-grade display controllers, it will
> typically be lower than what high-grade monitors can provide these days,
> so drivers will filter the TMDS character rate based on the controller
> capabilities.
> 
> To make that easier to handle for drivers, let's provide an optional
> hook to be implemented by drivers so they can tell the HDMI controller
> helpers if a given TMDS character rate is reachable for them or not.
> 
> This will then be useful to figure out the best format and bpc count for
> a given mode.
> 
> Reviewed-by: Dave Stevenson <dave.stevenson at raspberrypi.com>
> Signed-off-by: Maxime Ripard <mripard at kernel.org>
> ---
>  drivers/gpu/drm/display/drm_hdmi_state_helper.c    |  9 +++++++
>  drivers/gpu/drm/drm_connector.c                    |  4 +++
>  drivers/gpu/drm/tests/drm_connector_test.c         | 14 ++++++++++
>  drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c |  4 +++
>  include/drm/drm_connector.h                        | 31 ++++++++++++++++++++++
>  5 files changed, 62 insertions(+)
> 


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

-- 
With best wishes
Dmitry