arm64: dts: qcom: sc8280xp-crd: Enable EDP

The SC8280XP CRD has a EDP display on MDSS0 DP3, enable relevant nodes
and link it together with the backlight control.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230111035906.2975494-3-quic_bjorande@quicinc.com

arch/arm64/boot/dts/qcom/sc8280xp-crd.dts

@@ -20,7 +20,7 @@ aliases {
 		serial0 = &qup2_uart17;
 	};
 
-	backlight {
+	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pmc8280c_lpg 3 1000000>;
 		enable-gpios = <&pmc8280_1_gpios 8 GPIO_ACTIVE_HIGH>;
@@ -34,6 +34,22 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	vreg_edp_3p3: regulator-edp-3p3 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_EDP_3P3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 25 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_reg_en>;
+
+		regulator-boot-on;
+	};
+
 	vreg_edp_bl: regulator-edp-bl {
 		compatible = "regulator-fixed";
 
@@ -228,6 +244,55 @@ vreg_l9d: ldo9 {
 	};
 };
 
+&dispcc0 {
+	status = "okay";
+};
+
+&mdss0 {
+	status = "okay";
+};
+
+&mdss0_dp3 {
+	compatible = "qcom,sc8280xp-edp";
+
+	data-lanes = <0 1 2 3>;
+
+	status = "okay";
+
+	aux-bus {
+		panel {
+			compatible = "edp-panel";
+			power-supply = <&vreg_edp_3p3>;
+
+			backlight = <&backlight>;
+
+			ports {
+				port {
+					edp_panel_in: endpoint {
+						remote-endpoint = <&mdss0_dp3_out>;
+					};
+				};
+			};
+		};
+	};
+
+	ports {
+		port@1 {
+			reg = <1>;
+			mdss0_dp3_out: endpoint {
+				remote-endpoint = <&edp_panel_in>;
+			};
+		};
+	};
+};
+
+&mdss0_dp3_phy {
+	vdda-phy-supply = <&vreg_l6b>;
+	vdda-pll-supply = <&vreg_l3b>;
+
+	status = "okay";
+};
+
 &pcie2a {
 	perst-gpios = <&tlmm 143 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 145 GPIO_ACTIVE_LOW>;
@@ -494,6 +559,13 @@ hastings_reg_en: hastings-reg-en-state {
 &tlmm {
 	gpio-reserved-ranges = <74 6>, <83 4>, <125 2>, <128 2>, <154 7>;
 
+	edp_reg_en: edp-reg-en-state {
+		pins = "gpio25";
+		function = "gpio";
+		drive-strength = <16>;
+		bias-disable;
+	};
+
 	kybd_default: kybd-default-state {
 		disable-pins {
 			pins = "gpio102";