arm64: dts: renesas: sparrow-hawk: Add overlay for RPi Display 2

Add a DT overlay to bind the Raspberry Pi Display 2 (both 5" and 7"
variants), on the Retronix R-Car V4H Sparrow Hawk board.  All of display
output, touch controller, and backlight control have been tested.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250904202838.172579-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index ccdf7aaeca13ed15bc36059e19d15959159d3867..dd45927dbe691999b14eba0b44e35fcec85df366 100644 (file)
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -111,6 +111,12 @@ dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-camera-j2-imx462.dtb
 dtb-$(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-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-fan-pwm.dtb
+dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-rpi-display-2-5in.dtbo
+r8a779g3-sparrow-hawk-rpi-display-2-5in-dtbs := r8a779g3-sparrow-hawk.dtb r8a779g3-sparrow-hawk-rpi-display-2-5in.dtbo
+dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb
+dtb-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-rpi-display-2-7in.dtbo
+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 (file)
index 0000000..bf7b531
--- /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@mailbox.org>
+ */
+
+#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 (file)
index 0000000..6ec47f2
--- /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@mailbox.org>
+ */
+
+#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 (file)
index 0000000..733333b
--- /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@mailbox.org>
+ */
+
+/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 = <&reg_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 = <&reg_display>;
+               reset-gpios = <&mcu 0 GPIO_ACTIVE_LOW>;
+
+               port {
+                       panel_in: endpoint {
+                               remote-endpoint = <&dsi0_out>;
+                       };
+               };
+       };
+};