[PATCH v2] arm64: dts: qcom: talos: Add RPi Touch Display 2 5-inch overlay

[Abhishek Thomas Varghese <tessolveupstream@gmail.com>]

Add a DT overlay to connect the Raspberry Pi Touch Display 2 5-inch
panel to DSI0 on the Qualcomm IQ615/QCS615 EVK.

The overlay describes the display controller, panel, touch
controller, power supplies, and backlight. Disable the ADV7511
bridge to avoid a conflicting device on DSI virtual channel 0.

Display output, touch input, backlight control, and concurrent
DisplayPort operation have been tested.

Signed-off-by: Abhishek Thomas Varghese <tessolveupstream@gmail.com>
---
Changes in v2:
- Reference the existing hdmi_bridge node by label.
- Add blank lines before status properties consistently.
- Link to v1: https://lore.kernel.org/r/20260827-talos-rpi-touch-display-v1-1-911705fe6d6d@gmail.com
---
 arch/arm64/boot/dts/qcom/Makefile                  |  3 +
 .../boot/dts/qcom/talos-evk-rpi-display-2-5in.dtso | 88 ++++++++++++++++++++++
 2 files changed, 91 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1c86e7e98f55d539f5292816ce06c9a46bd4904c..7fbf79f65ecb8283e572554838c044d24298d360 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -421,6 +421,9 @@ dtb-$(CONFIG_ARCH_QCOM)	+= talos-evk-camera-imx577.dtb
 talos-evk-lvds-auo,g133han01-dtbs	:= \
 	talos-evk.dtb talos-evk-lvds-auo,g133han01.dtbo
 dtb-$(CONFIG_ARCH_QCOM)	+= talos-evk-lvds-auo,g133han01.dtb
+talos-evk-rpi-display-2-5in-dtbs	:= \
+	talos-evk.dtb talos-evk-rpi-display-2-5in.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= talos-evk-rpi-display-2-5in.dtb
 x1e001de-devkit-el2-dtbs	:= x1e001de-devkit.dtb x1-el2.dtbo
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e001de-devkit.dtb x1e001de-devkit-el2.dtb
 x1e78100-lenovo-thinkpad-t14s-el2-dtbs	:= x1e78100-lenovo-thinkpad-t14s.dtb x1-el2.dtbo
diff --git a/arch/arm64/boot/dts/qcom/talos-evk-rpi-display-2-5in.dtso b/arch/arm64/boot/dts/qcom/talos-evk-rpi-display-2-5in.dtso
new file mode 100644
index 0000000000000000000000000000000000000000..e49da096d9e38476373f8b10f0fb5bec994949a5
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/talos-evk-rpi-display-2-5in.dtso
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	display_bl: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&mcu 0 255 0>;
+	};
+
+	reg_display: regulator-display {
+		compatible = "regulator-fixed";
+		regulator-name = "rpi-display";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
+
+	reg_dsi_touch: regulator-dsi-touch {
+		compatible = "regulator-fixed";
+		gpio = <&mcu 1 GPIO_ACTIVE_HIGH>;
+		regulator-name = "rpi-touch";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		startup-delay-us = <50000>;
+		enable-active-high;
+	};
+};
+
+&hdmi_bridge {
+	status = "disabled";
+};
+
+&i2c1 {
+	clock-frequency = <400000>;
+
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	mcu: gpio@45 {
+		compatible = "raspberrypi,touchscreen-panel-regulator-v2";
+		reg = <0x45>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		#pwm-cells = <3>;
+	};
+
+	touchscreen@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		AVDD28-supply = <&reg_dsi_touch>;
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
+	};
+};
+
+&mdss_dsi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	status = "okay";
+
+	panel: panel@0 {
+		compatible = "raspberrypi,dsi-5inch", "ilitek,ili9881c";
+		reg = <0>;
+
+		backlight = <&display_bl>;
+		power-supply = <&reg_display>;
+		reset-gpios = <&mcu 0 GPIO_ACTIVE_LOW>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&mdss_dsi0_out>;
+			};
+		};
+	};
+};
+
+&mdss_dsi0_out {
+	remote-endpoint = <&panel_in>;
+	data-lanes = <0 1>;
+};

---
base-commit: 6a746cd265aed59107ebdaa9ce039bb832922969
change-id: 20260826-talos-rpi-touch-display-f2f8c580200d

Best regards,
-- 
Abhishek Thomas Varghese <tessolveupstream@gmail.com>