Subject: [PATCH v1 1/7] arm64: dts: ti: k3-am69-aquila: Add Toradex DSI to HDMI Adapter

From: Vitor Soares <[email-masked]>
Date: Fri, 29 May 2026 13:08:53 +0100

From: Vitor Soares <[email-masked]>

Add a device tree overlay for the Toradex DSI to HDMI Adapter on the
Aquila AM69 DSI_1 interface. Used on Aquila Development Board (J44),
where DSI_1 is exposed via a Samtec LSS-130 connector.

The adapter is based on the Lontium LT8912B DSI-to-HDMI bridge.

Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
Signed-off-by: Vitor Soares <[email-masked]>
---
 arch/arm64/boot/dts/ti/Makefile               |   4 +
 .../dts/ti/k3-am69-aquila-dsi-to-hdmi.dtso    | 115 ++++++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-hdmi.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 21db60cd19de..c1aa5c1df927 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -172,8 +172,12 @@ dtb-$(CONFIG_ARCH_K3) += k3-j722s-evm-csi2-quad-rpi-cam-imx219.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j722s-evm-csi2-quad-tevi-ov5640.dtbo
 
 # Boards with J784s4 SoC
+k3-am69-aquila-dev-dsi-to-hdmi-dtbs := k3-am69-aquila-dev.dtb \
+	k3-am69-aquila-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-clover.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dev.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dev-dsi-to-hdmi.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am69-sk-pcie0-ep.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
diff --git a/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-hdmi.dtso b/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-hdmi.dtso
new file mode 100644
index 000000000000..d8e4dd69599e
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-hdmi.dtso
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex DSI to HDMI Adapter on Aquila AM69 DSI_1.
+ * Used on Development Board (J44), DSI_1 is exposed via a Samtec LSS-130 connector.
+ *
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pwm3_dsi_gpio>;
+		ddc-i2c-bus = <&i2c_dsi_1>;
+		/* Aquila PWM_3_DSI (AQUILA B46) */
+		hpd-gpios = <&main_gpio0 33 GPIO_ACTIVE_HIGH>;
+		type = "a";
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&dsi_hdmi_bridge_out>;
+			};
+		};
+	};
+};
+
+&dphy_tx0 {
+	status = "okay";
+};
+
+&dsi0 {
+	status = "okay";
+};
+
+&dsi0_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@0 {
+		reg = <0>;
+
+		dsi0_out: endpoint {
+			remote-endpoint = <&dsi_hdmi_bridge_in>;
+		};
+	};
+
+	port@1 {
+		reg = <1>;
+
+		dsi0_in: endpoint {
+			remote-endpoint = <&dpi2_out>;
+		};
+	};
+};
+
+&dss_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@2 {
+		reg = <2>;
+
+		dpi2_out: endpoint {
+			remote-endpoint = <&dsi0_in>;
+		};
+	};
+};
+
+/* Aquila PWM_3_DSI (AQUILA B46) repurposed as HDMI HPD GPIO */
+&main_ehrpwm5 {
+	status = "disabled";
+};
+
+&i2c_dsi_0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	hdmi@48 {
+		compatible = "lontium,lt8912b";
+		reg = <0x48>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_20_dsi_1>;
+		/* Aquila GPIO_20_DSI_1 (AQUILA B45) */
+		reset-gpios = <&main_gpio0 18 GPIO_ACTIVE_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				dsi_hdmi_bridge_in: endpoint {
+					remote-endpoint = <&dsi0_out>;
+					data-lanes = <1 2 3 4>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				dsi_hdmi_bridge_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
+};
-- 
2.54.0