[PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Marek Vasut]

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@mailbox.org>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
---
V2: Build also the plain DTBO for each DTO. Each new DTO entry in the
    Makefile has three lines, the DTBO, combined and DTB targets. This
    is easy to miss, so note this down for myself.
---
 arch/arm64/boot/dts/renesas/Makefile          |  6 ++
 ...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, 122 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..bef624636d58b 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -99,6 +99,12 @@ 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-$(CONFIG_ARCH_R8A779G0) += r8a779g3-sparrow-hawk-fan-pwm.dtb
+dtb-$(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
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@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
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@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
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@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>;
+			};
+		};
+	};
+};
-- 
2.50.1

Re: [PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Geert Uytterhoeven]

Hi Marek,

On Thu, 4 Sept 2025 at 22:28, Marek Vasut
<marek.vasut+renesas@mailbox.org> wrote:
> 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@mailbox.org>
> ---
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Magnus Damm <magnus.damm@gmail.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: linux-renesas-soc@vger.kernel.org
> ---
> V2: Build also the plain DTBO for each DTO. Each new DTO entry in the
>     Makefile has three lines, the DTBO, combined and DTB targets. This
>     is easy to miss, so note this down for myself.

Thanks for the update!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso

> +&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>;

make dtbs_check:

    arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb:
gpio@45 (raspberrypi,touchscreen-panel-regulator-v2): '#gpio-cells',
'#pwm-cells', 'gpio-controller' do not match any of the regexes:
'^pinctrl-[0-9]+$'
            from schema $id:
http://devicetree.org/schemas/regulator/raspberrypi,7inch-touchscreen-panel-regulator.yaml#

I noticed you posted patches to fix all other issues in DT bindings
triggered by this series, so I assume you just forgot to post the
fixes for this one (which you authored ;-)?

> +       };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Marek Vasut]

On 9/5/25 11:25 AM, Geert Uytterhoeven wrote:

Hello Geert,

>> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso
> 
>> +&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>;
> 
> make dtbs_check:
> 
>      arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb:
> gpio@45 (raspberrypi,touchscreen-panel-regulator-v2): '#gpio-cells',
> '#pwm-cells', 'gpio-controller' do not match any of the regexes:
> '^pinctrl-[0-9]+$'
>              from schema $id:
> http://devicetree.org/schemas/regulator/raspberrypi,7inch-touchscreen-panel-regulator.yaml#
> 
> I noticed you posted patches to fix all other issues in DT bindings
> triggered by this series, so I assume you just forgot to post the
> fixes for this one (which you authored ;-)?
I think the following patch handles this:

[PATCH] regulator: dt-bindings: rpi-panel: Split 7" Raspberry Pi 
720x1280 v2 binding

Re: [PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Geert Uytterhoeven]

On Fri, 5 Sept 2025 at 13:50, Marek Vasut <marek.vasut@mailbox.org> wrote:
>
> On 9/5/25 11:25 AM, Geert Uytterhoeven wrote:
>
> Hello Geert,
>
> >> +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-7in.dtso
> >
> >> +&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>;
> >
> > make dtbs_check:
> >
> >      arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk-rpi-display-2-5in.dtb:
> > gpio@45 (raspberrypi,touchscreen-panel-regulator-v2): '#gpio-cells',
> > '#pwm-cells', 'gpio-controller' do not match any of the regexes:
> > '^pinctrl-[0-9]+$'
> >              from schema $id:
> > http://devicetree.org/schemas/regulator/raspberrypi,7inch-touchscreen-panel-regulator.yaml#
> >
> > I noticed you posted patches to fix all other issues in DT bindings
> > triggered by this series, so I assume you just forgot to post the
> > fixes for this one (which you authored ;-)?
> I think the following patch handles this:
>
> [PATCH] regulator: dt-bindings: rpi-panel: Split 7" Raspberry Pi
> 720x1280 v2 binding

Thanks, "[PATCH v2] regulator: dt-bindings: rpi-panel: Split 7"
Raspberry Pi 720x1280 v2 binding"[1] does.

[1] https://lore.kernel.org/all/20250905191637.147141-1-marek.vasut+renesas@mailbox.org/

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2] arm64: dts: renesas: r8a779g3: Add RPi Display 2 DTO to Retronix R-Car V4H Sparrow Hawk

[Geert Uytterhoeven]

On Thu, 4 Sept 2025 at 22:28, Marek Vasut
<marek.vasut+renesas@mailbox.org> wrote:
> 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@mailbox.org>

> V2: Build also the plain DTBO for each DTO. Each new DTO entry in the
>     Makefile has three lines, the DTBO, combined and DTB targets. This
>     is easy to miss, so note this down for myself.

LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v6.19.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds