From 5634f777a6a94db316f9b26c00525320c3b582c2 Mon Sep 17 00:00:00 2001
From: Icenowy Zheng <uwu@icenowy.me>
Date: Thu, 29 Jan 2026 10:39:20 +0800
Subject: [PATCH 1/2] riscv: dts: thead: add DPU and HDMI device tree nodes

T-Head TH1520 SoC contains a Verisilicon DC8200 display controller
(called DPU in manual) and a Synopsys DesignWare HDMI TX controller.

Add device tree nodes to them.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Tested-by: Han Gao <gaohan@iscas.ac.cn>
Tested-by: Michal Wilczynski <m.wilczynski@samsung.com>
Reviewed-by: Drew Fustini <fustini@kernel.org>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Drew Fustini <fustini@kernel.org>
---
 arch/riscv/boot/dts/thead/th1520.dtsi | 66 +++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index bd5d33840884..b66307742894 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -585,6 +585,72 @@ clk_vo: clock-controller@ffef528050 {
 			#clock-cells = <1>;
 		};
 
+		hdmi: hdmi@ffef540000 {
+			compatible = "thead,th1520-dw-hdmi";
+			reg = <0xff 0xef540000 0x0 0x40000>;
+			reg-io-width = <4>;
+			interrupts = <111 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk_vo CLK_HDMI_PCLK>,
+				 <&clk_vo CLK_HDMI_SFR>,
+				 <&clk_vo CLK_HDMI_CEC>,
+				 <&clk_vo CLK_HDMI_PIXCLK>;
+			clock-names = "iahb", "isfr", "cec", "pix";
+			resets = <&rst TH1520_RESET_ID_HDMI>,
+				 <&rst TH1520_RESET_ID_HDMI_APB>;
+			reset-names = "main", "apb";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					hdmi_in: endpoint {
+						remote-endpoint = <&dpu_out_dp1>;
+					};
+				};
+
+				hdmi_out_port: port@1 {
+					reg = <1>;
+				};
+			};
+		};
+
+		dpu: display@ffef600000 {
+			compatible = "thead,th1520-dc8200", "verisilicon,dc";
+			reg = <0xff 0xef600000 0x0 0x100000>;
+			interrupts = <93 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk_vo CLK_DPU_CCLK>,
+				 <&clk_vo CLK_DPU_ACLK>,
+				 <&clk_vo CLK_DPU_HCLK>,
+				 <&clk_vo CLK_DPU_PIXELCLK0>,
+				 <&clk_vo CLK_DPU_PIXELCLK1>;
+			clock-names = "core", "axi", "ahb", "pix0", "pix1";
+			resets = <&rst TH1520_RESET_ID_DPU_CORE>,
+				 <&rst TH1520_RESET_ID_DPU_AXI>,
+				 <&rst TH1520_RESET_ID_DPU_AHB>;
+			reset-names = "core", "axi", "ahb";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				dpu_port1: port@1 {
+					reg = <1>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					dpu_out_dp1: endpoint@1 {
+						reg = <1>;
+						remote-endpoint = <&hdmi_in>;
+					};
+				};
+			};
+		};
+
 		dmac0: dma-controller@ffefc00000 {
 			compatible = "snps,axi-dma-1.01a";
 			reg = <0xff 0xefc00000 0x0 0x1000>;

From 9c99a784d9117a192ebf779d4f72ebec435ada97 Mon Sep 17 00:00:00 2001
From: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Date: Thu, 29 Jan 2026 10:39:21 +0800
Subject: [PATCH 2/2] riscv: dts: thead: lichee-pi-4a: enable HDMI

Lichee Pi 4A board features a HDMI Type-A connector connected to the
HDMI TX controller of TH1520 SoC.

Add a device tree node describing the connector, connect it to the HDMI
controller, and enable everything on this display pipeline.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Tested-by: Han Gao <gaohan@iscas.ac.cn>
Tested-by: Michal Wilczynski <m.wilczynski@samsung.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Drew Fustini <fustini@kernel.org>
Signed-off-by: Drew Fustini <fustini@kernel.org>
---
 .../boot/dts/thead/th1520-lichee-pi-4a.dts    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
index c58c2085ca92..7cb7d28683bc 100644
--- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
+++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
@@ -29,6 +29,17 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con_in: endpoint {
+				remote-endpoint = <&hdmi_out_con>;
+			};
+		};
+	};
+
 	thermal-zones {
 		cpu-thermal {
 			polling-delay = <1000>;
@@ -121,6 +132,20 @@ rx-pins {
 	};
 };
 
+&dpu {
+	status = "okay";
+};
+
+&hdmi {
+	status = "okay";
+};
+
+&hdmi_out_port {
+	hdmi_out_con: endpoint {
+		remote-endpoint = <&hdmi_con_in>;
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;