drm: bridge: dw_hdmi: Switch to of_graph_get_remote_node()

To reduce boilerplate, use of_graph_get_remote_node() helper instead of
the hand-rolling code.
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240316170513.1159724-1-sui.jingfeng@linux.devSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240316170513.1159724-1-sui.jingfeng@linux.dev

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

@@ -3291,40 +3291,17 @@ static void dw_hdmi_init_hw(struct dw_hdmi *hdmi)
 
 static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi)
 {
-	struct device_node *endpoint;
 	struct device_node *remote;
 
 	if (!hdmi->plat_data->output_port)
 		return 0;
 
-	endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node,
+
+	remote = of_graph_get_remote_node(hdmi->dev->of_node,
 					  hdmi->plat_data->output_port,
 					  -1);
-	if (!endpoint) {
-		/*
-		 * On platforms whose bindings don't make the output port
-		 * mandatory (such as Rockchip) the plat_data->output_port
-		 * field isn't set, so it's safe to make this a fatal error.
-		 */
-		dev_err(hdmi->dev, "Missing endpoint in port@%u\n",
-			hdmi->plat_data->output_port);
-		return -ENODEV;
-	}
-
-	remote = of_graph_get_remote_port_parent(endpoint);
-	of_node_put(endpoint);
-	if (!remote) {
-		dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n",
-			hdmi->plat_data->output_port);
+	if (!remote)
 		return -ENODEV;
-	}
-
-	if (!of_device_is_available(remote)) {
-		dev_err(hdmi->dev, "port@%u remote device is disabled\n",
-			hdmi->plat_data->output_port);
-		of_node_put(remote);
-		return -ENODEV;
-	}
 
 	hdmi->next_bridge = of_drm_find_bridge(remote);
 	of_node_put(remote);