[PATCH v9 02/19] drm: Add new general DRM property "color format"

[Dmitry Baryshkov]

On Fri, Feb 27, 2026 at 08:20:07PM +0100, Nicolas Frattaroli wrote:
> From: Andri Yngvason <andri at yngvason.is>
> 
> Add a new general DRM property named "color format" which can be used by
> userspace to request the display driver to output a particular color
> format.
> 
> Possible options are:
>     - auto (setup by default, driver internally picks the color format)
>     - rgb
>     - ycbcr444
>     - ycbcr422
>     - ycbcr420
> 
> Drivers should advertise from this list which formats they support.
> Together with this list and EDID data from the sink we should be able
> to relay a list of usable color formats to users to pick from.
> 
> Signed-off-by: Werner Sembach <wse at tuxedocomputers.com>
> Signed-off-by: Andri Yngvason <andri at yngvason.is>
> Signed-off-by: Marius Vlad <marius.vlad at collabora.com>
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli at collabora.com>
> ---
>  drivers/gpu/drm/drm_atomic_helper.c |   5 ++
>  drivers/gpu/drm/drm_atomic_uapi.c   |  11 ++++
>  drivers/gpu/drm/drm_connector.c     | 124 ++++++++++++++++++++++++++++++++++++
>  include/drm/drm_connector.h         | 103 ++++++++++++++++++++++++++++++
>  4 files changed, 243 insertions(+)

It seems and feels that the common code to be used (almost?) everywhere
would be:

if (!drm_mode_create_color_format_property(connector, supported_formats))
	drm_connector_attach_color_format_property(connector);


Please mention somewhere the reason to split that into two functions.


-- 
With best wishes
Dmitry