From: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Date: Wed, 25 Mar 2026 14:41:49 +0000 (+0100)
Subject: arm64: dts: st: enable display support on stm32mp257f-dk board
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=897b9a36c22c4408240c398e395c4d97e2f1a2d7;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: st: enable display support on stm32mp257f-dk board

Enable the following IPs on stm32mp257f-dk in order to get display:
   * LTDC
   * LVDS
   * WSVGA LVDS panel (1024x600)
   * Panel LVDS backlight as GPIO backlight
   * ILI2511 i2c touchscreen

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Link: https://lore.kernel.org/r/20260210-display-v2-9-0592bd514958@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
---

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
index 3298cc578579..8daf3dfd5133 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
@@ -84,6 +84,42 @@
 		};
 	};
 
+	panel_lvds: display {
+		compatible = "edt,etml0700z9ndha", "panel-lvds";
+		enable-gpios = <&gpioi 4 GPIO_ACTIVE_HIGH>;
+		backlight = <&panel_lvds_backlight>;
+		power-supply = <&scmi_v3v3>;
+		width-mm = <156>;
+		height-mm = <92>;
+		data-mapping = "vesa-24";
+		status = "okay";
+
+		panel-timing {
+			clock-frequency = <54000000>;
+			hactive = <1024>;
+			vactive = <600>;
+			hfront-porch = <150>;
+			hback-porch = <150>;
+			hsync-len = <21>;
+			vfront-porch = <24>;
+			vback-porch = <24>;
+			vsync-len = <21>;
+		};
+
+		port {
+			lvds_panel_in: endpoint {
+				remote-endpoint = <&lvds_out0>;
+			};
+		};
+	};
+
+	panel_lvds_backlight: backlight {
+		compatible = "gpio-backlight";
+		gpios = <&gpioi 4 GPIO_ACTIVE_HIGH>;
+		default-on;
+		status = "okay";
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -135,6 +171,15 @@
 	/* spare dmas for other usage */
 	/delete-property/dmas;
 	/delete-property/dma-names;
+
+	ili2511: ili2511@41 {
+		compatible = "ilitek,ili251x";
+		reg = <0x41>;
+		interrupt-parent = <&gpioi>;
+		interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpioi 0 GPIO_ACTIVE_LOW>;
+		status = "okay";
+	};
 };
 
 &i2c8 {
@@ -150,6 +195,37 @@
 	/delete-property/dma-names;
 };
 
+&ltdc {
+	status = "okay";
+	port {
+		ltdc_ep0_out: endpoint {
+			remote-endpoint = <&lvds_in>;
+		};
+	};
+};
+
+&lvds {
+	status = "okay";
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			lvds_in: endpoint {
+				remote-endpoint = <&ltdc_ep0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			lvds_out0: endpoint {
+				remote-endpoint = <&lvds_panel_in>;
+			};
+		};
+	};
+};
+
 &scmi_regu {
 	scmi_vddio1: regulator@0 {
 		regulator-min-microvolt = <1800000>;