linux-kernel - [PATCH v3] arm64: dts: rockchip: Fix the PinePhone Pro DTS' panel description

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Message-Id: <20250619-dtb_fixes-v3-1-9cb02ddd8ce4@bootlin.com>
Date: Thu, 19 Jun 2025 15:41:24 +0200
From: Olivier Benjamin <olivier.benjamin@...tlin.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Olivier Benjamin <olivier.benjamin@...tlin.com>
Subject: [PATCH v3] arm64: dts: rockchip: Fix the PinePhone Pro DTS' panel
 description

Fix a few issues in the panel section of the PinePhone Pro DTS:
  - add the second part of the Himax HX8394 LCD panel controller
    compatible
  - as proposed by Diederik de Haas, reuse the mipi_out and ports
    definitions from rk3399-base.dtsi instead of redefining them
  - add a pinctrl for the LCD_RST signal for LCD1, derived from
    LCD1_RST, which is on GPIO4_D1, as documented on pages 11
    and 16 of the PinePhone Pro schematic

Signed-off-by: Olivier Benjamin <olivier.benjamin@...tlin.com>
---
Small fixes to the PinePhone Pro DTS to fit bindings and
suppress warnings at build.
---
Changes in v3:
- Amended the LCD pinctrl name to match the pin's name in the Datasheet
- Link to v2: https://lore.kernel.org/r/20250619-dtb_fixes-v2-1-abd711d11b67@bootlin.com

Changes in v2:
- Added the pinctrl definition for GPIO4_D1/LCD1_RST
- Removed redefinition of the lcd panel ports from rk3399-base.dtsi and
  added only the mipi_out definition
- Squashed multiple patches into one
- Link to v1: https://lore.kernel.org/r/20250618-dtb_fixes-v1-0-e54797ad2eba@bootlin.com
---
 .../boot/dts/rockchip/rk3399-pinephone-pro.dts     | 33 +++++++++++-----------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
index 04ba4c4565d0a205e2e46d7535c6a3190993621d..909ed14035f783fd14362f4e3a9a3fe3b50d5937 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -463,29 +463,18 @@ &io_domains {
 };
 
 &mipi_dsi {
-	status = "okay";
 	clock-master;
-
-	ports {
-		mipi_out: port@1 {
-			#address-cells = <0>;
-			#size-cells = <0>;
-			reg = <1>;
-
-			mipi_out_panel: endpoint {
-				remote-endpoint = <&mipi_in_panel>;
-			};
-		};
-	};
+	status = "okay";
 
 	panel@0 {
-		compatible = "hannstar,hsd060bhw4";
+		compatible = "hannstar,hsd060bhw4", "himax,hx8394";
 		reg = <0>;
 		backlight = <&backlight>;
-		reset-gpios = <&gpio4 RK_PD1 GPIO_ACTIVE_LOW>;
-		vcc-supply = <&vcc2v8_lcd>;
 		iovcc-supply = <&vcc1v8_lcd>;
 		pinctrl-names = "default";
+		pinctrl-0 = <&lcd1_rst_pin>;
+		reset-gpios = <&gpio4 RK_PD1 GPIO_ACTIVE_LOW>;
+		vcc-supply = <&vcc2v8_lcd>;
 
 		port {
 			mipi_in_panel: endpoint {
@@ -495,6 +484,12 @@ mipi_in_panel: endpoint {
 	};
 };
 
+&mipi_out {
+	mipi_out_panel: endpoint {
+		remote-endpoint = <&mipi_in_panel>;
+	};
+};
+
 &pmu_io_domains {
 	pmu1830-supply = <&vcc_1v8>;
 	status = "okay";
@@ -507,6 +502,12 @@ pwrbtn_pin: pwrbtn-pin {
 		};
 	};
 
+	lcd {
+		lcd1_rst_pin: lcd1-rst-pin {
+			rockchip,pins = <4 RK_PD1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	leds {
 		red_led_pin: red-led-pin {
 			rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
-- 
Olivier Benjamin <olivier.benjamin@...tlin.com>