ARM: dts: qcom: msm8974-hammerhead: add support for display

Add initial support for the display found on the LG Nexus 5 (hammerhead)
phone. This is based on work from Jonathan Marek.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts

@@ -345,6 +345,16 @@
 				bias-pull-up;
 			};
 		};
+
+		panel_pin: panel {
+			te {
+				pins = "gpio12";
+				function = "mdp_vsync";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
 	};
 
 	sdhci@f9824900 {
@@ -564,6 +574,54 @@
 			};
 		};
 	};
+
+	mdss@fd900000 {
+		status = "ok";
+
+		mdp@fd900000 {
+			status = "ok";
+		};
+
+		dsi@fd922800 {
+			status = "ok";
+
+			vdda-supply = <&pm8941_l2>;
+			vdd-supply = <&pm8941_lvs3>;
+			vddio-supply = <&pm8941_l12>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			ports {
+				port@1 {
+					endpoint {
+						remote-endpoint = <&panel_in>;
+						data-lanes = <0 1 2 3>;
+					};
+				};
+			};
+
+			panel: panel@0 {
+				reg = <0>;
+				compatible = "lg,acx467akm-7";
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&panel_pin>;
+
+				port {
+					panel_in: endpoint {
+						remote-endpoint = <&dsi0_out>;
+					};
+				};
+			};
+		};
+
+		dsi-phy@fd922a00 {
+			status = "ok";
+
+			vddio-supply = <&pm8941_l12>;
+		};
+	};
 };
 
 &spmi_bus {