[PATCH v2 4/8] drm: Add drm_connector_mode_valid()

Add a new helper to call connector->mode_valid callback. Suggested-by: Ville Syrjälä Signed-off-by: Jose Abreu Cc: Carlos Palminha Cc: Alexey Brodkin Cc: Ville Syrjälä

[PATCH v2 4/8] drm: Add drm_connector_mode_valid()

Add a new helper to call connector->mode_valid callback. Suggested-by: Ville Syrjälä Signed-off-by: Jose Abreu Cc: Carlos Palminha Cc: Alexey Brodkin Cc: Ville Syrjälä Cc: Daniel Vetter Cc: Dave Airlie Cc: Andrzej Hajda Cc: Archit Taneja --- TODO: function prototype should receive a