linux-kernel - [PATCH] arm64: dts: rockchip: Add DSI LCD display on rk3576-evb1

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Message-Id: <20250925-rk3576-evb1-dsi-v1-1-c76fc3740abc@gmail.com>
Date: Thu, 25 Sep 2025 00:38:13 +0400
From: Alexey Charkov <alchark@...il.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: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH] arm64: dts: rockchip: Add DSI LCD display on rk3576-evb1

Add support for the Rockchip W552793DBA-V10 LCD+touchscreen assembly which
comes physically attached to Rockchip RK3576 EVB1 boards.

The display part is driven by the on-chip MIPI DSI controller, and the
touchscreen is connected over I2C.

Signed-off-by: Alexey Charkov <alchark@...il.com>
---
Note that backlight support is left out for now, as it depends on PWM
support [0] which has not yet been merged.

A workaround is simply `gpioset -c 0 13=1` to set the respective GPIO
pin high and thus to light up the display unconditionally.

[0] https://lore.kernel.org/lkml/20250602-rk3576-pwm-v2-0-a6434b0ce60c@collabora.com/
---
 arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts | 89 ++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index db8fef7a4f1b9570cb517ccc9a857d1c93c9d2db..f20cd6f2c079e0a5bd79acc9ebcd56b499e0f72f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
@@ -125,6 +125,8 @@ vcc3v3_lcd_n: regulator-vcc3v3-lcd0-n {
 		regulator-boot-on;
 		enable-active-high;
 		gpio = <&gpio0 RK_PC6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc3v3_lcd_s0_en>;
 		vin-supply = <&vcc_3v3_s0>;
 	};
 
@@ -264,6 +266,43 @@ &combphy1_psu {
 	status = "okay";
 };
 
+&dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&mipim1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	panel@0 {
+		compatible = "wanchanglong,w552793baa", "raydium,rm67200";
+		reg = <0>;
+
+		iovcc-supply = <&vcc3v3_lcd_n>;
+		reset-gpios = <&gpio3 RK_PB5 GPIO_ACTIVE_LOW>;
+		vdd-supply = <&vcc3v3_lcd_n>;
+		vsn-supply = <&vcc5v0_device>;
+		vsp-supply = <&vcc5v0_device>;
+
+		port {
+			mipi_panel_in: endpoint {
+				remote-endpoint = <&dsi_out_panel>;
+			};
+		};
+	};
+};
+
+&dsi_in {
+	dsi_in_vp1: endpoint {
+		remote-endpoint = <&vp1_out_dsi>;
+	};
+};
+
+&dsi_out {
+	dsi_out_panel: endpoint {
+		remote-endpoint = <&mipi_panel_in>;
+	};
+};
+
 &gmac0 {
 	clock_in_out = "output";
 	phy-mode = "rgmii-rxid";
@@ -319,6 +358,28 @@ &hdptxphy {
 	status = "okay";
 };
 
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0m1_xfer>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	touchscreen@14 {
+		compatible = "goodix,gt1158";
+		reg = <0x14>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PC5 IRQ_TYPE_LEVEL_LOW>;
+		irq-gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&tp_int>, <&tp_rst>;
+		reset-gpios = <&gpio0 RK_PD0 GPIO_ACTIVE_HIGH>;
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
+		VDDIO-supply = <&vcc3v3_lcd_n>;
+	};
+};
+
 &i2c1 {
 	status = "okay";
 
@@ -738,6 +799,10 @@ rgmii_phy1: ethernet-phy@1 {
 	};
 };
 
+&mipidcphy {
+	status = "okay";
+};
+
 &pcie0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie0_rst>;
@@ -788,6 +853,20 @@ host_wake_bt: host-wake-bt {
 		};
 	};
 
+	display {
+		vcc3v3_lcd_s0_en: vcc3v3-lcd-s0-en {
+			rockchip,pins = <0 RK_PC6 0 &pcfg_pull_none>;
+		};
+
+		tp_int: tp-int {
+			rockchip,pins = <0 RK_PC5 0 &pcfg_pull_none>;
+		};
+
+		tp_rst: tp-rst {
+			rockchip,pins = <0 RK_PD0 0 &pcfg_pull_none>;
+		};
+	};
+
 	hym8563 {
 		rtc_int: rtc-int {
 			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
@@ -941,3 +1020,13 @@ vp0_out_hdmi: endpoint@...KCHIP_VOP2_EP_HDMI0 {
 		remote-endpoint = <&hdmi_in_vp0>;
 	};
 };
+
+&vp1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	vp1_out_dsi: endpoint@...KCHIP_VOP2_EP_MIPI0 {
+		reg = <ROCKCHIP_VOP2_EP_MIPI0>;
+		remote-endpoint = <&dsi_in_vp1>;
+	};
+};

---
base-commit: ce7f1a983b074f6cf8609068088ca3182c569ee4
change-id: 20250924-rk3576-evb1-dsi-e39f34833bf6

Best regards,
-- 
Alexey Charkov <alchark@...il.com>