drm/bridge: display-connector: allow YCbCr 420 for HDMI and DP

Allow YCbCr 420 output for HDMI and DisplayPort connectors. Other
bridges in the chain still might limit YCbCr 420 support on the
corresponding connector.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241019-bridge-yuv420-v1-3-d74efac9e4e6@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/bridge/display-connector.c

@@ -270,6 +270,10 @@ static int display_connector_probe(struct platform_device *pdev)
 	/* All the supported connector types support interlaced modes. */
 	conn->bridge.interlace_allowed = true;
 
+	if (type == DRM_MODE_CONNECTOR_HDMIA ||
+	    type == DRM_MODE_CONNECTOR_DisplayPort)
+		conn->bridge.ycbcr_420_allowed = true;
+
 	/* Get the optional connector label. */
 	of_property_read_string(pdev->dev.of_node, "label", &label);