arm64: dts: qcom: sm8150-hdk: enable HDMI output

Add DSI outputs and link them to the onboard Lontium LT9611 DSI-to-HDMI
bridge, enabling HDMI output on this board. While adding the display
resources, also drop the headless ("amd,imageon") compat string from the
GPU node, since the board now has output.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20231215174152.315403-3-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sm8150-hdk.dts

@@ -54,6 +54,17 @@ key-vol-up {
 			gpios = <&pm8150_gpios 6 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	hdmi-out {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con: endpoint {
+				remote-endpoint = <&lt9611_out>;
+			};
+		};
+	};
 };
 
 &apps_rsc {
@@ -359,12 +370,112 @@ &gmu {
 	status = "okay";
 };
 
+&gpi_dma1 {
+	status = "okay";
+};
+
 &gpu {
-	/*
-	 * NOTE: "amd,imageon" makes Adreno start in headless mode, remove it
-	 * after display support is added on this board.
-	 */
-	compatible = "qcom,adreno-640.1", "qcom,adreno", "amd,imageon";
+	status = "okay";
+};
+
+&i2c9 {
+	status = "okay";
+	clock-frequency = <400000>;
+
+	lt9611_codec: hdmi-bridge@3b {
+		compatible = "lontium,lt9611";
+		reg = <0x3b>;
+		#sound-dai-cells = <1>;
+
+		interrupts-extended = <&tlmm 9 IRQ_TYPE_EDGE_FALLING>;
+
+		reset-gpios = <&tlmm 7 GPIO_ACTIVE_HIGH>;
+
+		vdd-supply = <&vreg_s4a_1p8>;
+		vcc-supply = <&vreg_bob>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&lt9611_irq_pin>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				lt9611_a: endpoint {
+					remote-endpoint = <&mdss_dsi0_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				lt9611_b: endpoint {
+					remote-endpoint = <&mdss_dsi1_out>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+
+				lt9611_out: endpoint {
+					remote-endpoint = <&hdmi_con>;
+				};
+			};
+		};
+	};
+};
+
+&mdss {
+	status = "okay";
+};
+
+&mdss_dsi0 {
+	status = "okay";
+	vdda-supply = <&vreg_l3c_1p2>;
+
+	qcom,dual-dsi-mode;
+	qcom,master-dsi;
+
+	ports {
+		port@1 {
+			endpoint {
+				remote-endpoint = <&lt9611_a>;
+				data-lanes = <0 1 2 3>;
+			};
+		};
+	};
+};
+
+&mdss_dsi0_phy {
+	status = "okay";
+	vdds-supply = <&vreg_l5a_0p875>;
+};
+
+&mdss_dsi1 {
+	vdda-supply = <&vreg_l3c_1p2>;
+
+	qcom,dual-dsi-mode;
+
+	/* DSI1 is slave, so use DSI0 clocks */
+	assigned-clock-parents = <&mdss_dsi0_phy 0>, <&mdss_dsi0_phy 1>;
+
+	status = "okay";
+
+	ports {
+		port@1 {
+			endpoint {
+				remote-endpoint = <&lt9611_b>;
+				data-lanes = <0 1 2 3>;
+			};
+		};
+	};
+};
+
+&mdss_dsi1_phy {
+	vdds-supply = <&vreg_l5a_0p875>;
 	status = "okay";
 };
 
@@ -402,6 +513,13 @@ &remoteproc_slpi {
 
 &tlmm {
 	gpio-reserved-ranges = <0 4>, <126 4>;
+
+	lt9611_irq_pin: lt9611-irq-state {
+		pins = "gpio9";
+		function = "gpio";
+		bias-disable;
+	};
+
 };
 
 &uart2 {