Add DT overlay to bind RPi Display 2, both 5" and 7" variant, on
Retronix R-Car V4H Sparrow Hawk board. All of display output, the
touch controller, and backlight control have been tested.
Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
---
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
Cc: Magnus Damm <magnus.damm@xxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
---
arch/arm64/boot/dts/renesas/Makefile | 4 +
...a779g3-sparrow-hawk-rpi-display-2-5in.dtso | 13 +++
...a779g3-sparrow-hawk-rpi-display-2-7in.dtso | 13 +++
.../r8a779g3-sparrow-hawk-rpi-display-2.dtsi | 90 +++++++++++++++++++
4 files changed, 120 insertions(+)
create mode 100644 arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtso
create mode 100644 arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso
create mode 100644 arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2.dtsi
diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index d8c9237624664..b14e593208758 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -99,6 +99,10 @@ dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk.dtb
dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-fan-pwm.dtbo
r8a779g3-sparrow-hawk-fan-pwm-dtbs := r8a779g3-sparrow-hawk.dtb r8a779g3-sparrow-hawk-fan-pwm.dtbo
dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-fan-pwm.dtb
+r8a779g3-sparrow-hawk-rpi-display-2-5in-dtbs := r8a779g3-sparrow-hawk.dtb r8a779g3-sparrow-hawk-rpi-display-2-5in.dtbo
+dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb
+r8a779g3-sparrow-hawk-rpi-display-2-7in-dtbs := r8a779g3-sparrow-hawk.dtb r8a779g3-sparrow-hawk-rpi-display-2-7in.dtbo
+dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-rpi-display-2-7in.dtb
dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-white-hawk-single.dtb
r8a779g3-white-hawk-single-ard-audio-da7212-dtbs := r8a779g3-white-hawk-single.dtb white-hawk-ard-audio-da7212.dtbo
diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtso b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtso
new file mode 100644
index 0000000000000..bf7b531ae9d9b
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtso
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Overlay for the RPi Display 2 5" MIPI DSI panel connected
+ * to J4:DSI on R-Car V4H ES3.0 Sparrow Hawk board
+ *
+ * Copyright (C) 2025 Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
+ */
+
+#include "r8a779g3-sparrow-hawk-rpi-display-2.dtsi"
+
+&panel {
+ compatible = "raspberrypi,dsi-5inch", "ilitek,ili9881c";
+};
diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso
new file mode 100644
index 0000000000000..6ec47f213c0ff
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Overlay for the RPi Display 2 7" MIPI DSI panel connected
+ * to J4:DSI on R-Car V4H ES3.0 Sparrow Hawk board
+ *
+ * Copyright (C) 2025 Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
+ */
+
+#include "r8a779g3-sparrow-hawk-rpi-display-2.dtsi"
+
+&panel {
+ compatible = "raspberrypi,dsi-7inch", "ilitek,ili9881c";
+};
diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2.dtsi b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2.dtsi
new file mode 100644
index 0000000000000..733333b85a9d2
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2.dtsi
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Overlay for the RPi Display 2 MIPI DSI panel connected
+ * to J4:DSI on R-Car V4H ES3.0 Sparrow Hawk board
+ *
+ * Copyright (C) 2025 Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
+ */
+
+/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;
+ };
+};
+
+&i2c0_mux3 {
+ #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 = <®_dsi_touch>;
+ touchscreen-size-x = <720>;
+ touchscreen-size-y = <1280>;
+ };
+};
+
+&dsi0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@1 {
+ reg = <1>;
+
+ dsi0_out: endpoint {
+ remote-endpoint = <&panel_in>;
+ data-lanes = <1 2>;
+ };
+ };
+ };
+
+ panel: panel@0 {
+ reg = <0>;
+ backlight = <&display_bl>;
+ power-supply = <®_display>;
+ reset-gpios = <&mcu 0 GPIO_ACTIVE_LOW>;
+
+ port {
+ panel_in: endpoint {
+ remote-endpoint = <&dsi0_out>;
+ };
+ };
+ };
+};
--
2.50.1
