Signed-off-by: Xaver Hugl <xaver.hugl@xxxxxxx> --- drivers/gpu/drm/drm_connector.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index b0516505f7ae..01e13984629b 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2158,6 +2158,14 @@ EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); * one supported. Sink supported colorspaces should be retrieved by * userspace from EDID and driver will not explicitly expose them. * + * As userspace can't currently know whether or not the output is using + * RGB or YCC signalling, the driver must translate properties to their + * relevant RGB or YCC counterparts, depending on the actually used + * signalling. Property values that are only valid for either YCC or RGB + * and have no equivalent for the other signalling type must not be + * exposed as supported, unless the driver can guarantee it never uses + * the signalling that doesn't match the property. + * * Basically the expectation from userspace is: * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink * colorspace -- 2.43.0
