drm/rockchip: rk618: Add support for hdmi

Change-Id: I009e39d4d81e3e0c3f3937ea830f170f08272e21
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>

Documentation/devicetree/bindings/display/rockchip/rockchip,rk618.txt

@@ -210,3 +210,50 @@ Example:
 		};
 	};
 };
+
+HDMI Connector
+------------
+
+Required properties:
+- compatible: value should be one of the following:
+   "rockchip,rk618-hdmi"
+- clocks: must include clock specifiers corresponding to entries in the
+	  clock-names property.
+	  See ../clocks/clock-bindings.txt for details.
+- clock-names: list of clock names sorted in the same order as the clocks
+	       property. Must contain "hdmi".
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+
+Required nodes:
+
+The connections to the video ports are modeled using the OF graph
+bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+Example:
+
+&rk618 {
+	status = "okay";
+
+	hdmi {
+		compatible = "rockchip,rk618-hdmi";
+		clocks = <&CRU HDMI_CLK>;
+		clock-names = "hdmi";
+		interrupt-parent = <&gpio3>;
+		interrupts = <23 IRQ_TYPE_LEVEL_HIGH>;
+		status = "okay";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				bridge_input_rgb: endpoint {
+					remote-endpoint = <&rgb_out_bridge>;
+				};
+			};
+		};
+	};
+};

drivers/gpu/drm/rockchip/rk618/Makefile

@@ -7,4 +7,5 @@ obj-$(CONFIG_DRM_ROCKCHIP_RK618) += rk618_scaler.o \
 				    rk618_vif.o \
 				    rk618_dither.o \
 				    rk618_lvds.o \
-				    rk618_rgb.o
+				    rk618_rgb.o \
+				    rk618_hdmi.o