drm/bridge: dw-hdmi: add max bpc connector property

Add the max_bpc property to the dw-hdmi connector to prepare support for 10, 12 & 16bit output support. Signed-off-by: Jonas Karlman <[email protected]> Signed-off-by: Neil Armstrong <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Reviewed-by: Jernej Škrabec <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
vieko · Mar 10, 2020 · b8e810e · b8e810e
1 parent c6cae70
commit b8e810e
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2414,6 +2414,14 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge,
 				    DRM_MODE_CONNECTOR_HDMIA,
 				    hdmi->ddc);
 
+	/*
+	 * drm_connector_attach_max_bpc_property() requires the
+	 * connector to have a state.
+	 */
+	drm_atomic_helper_connector_reset(connector);
+
+	drm_connector_attach_max_bpc_property(connector, 8, 16);
+
 	if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe)
 		drm_object_attach_property(&connector->base,
 			connector->dev->mode_config.hdr_output_metadata_property, 0);