[PATCH v2 4/4] arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS support

[Frieder Schrempf <frieder@fris.de>]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

The Kontron Electronics DL i.MX8MM consists of the BL i.MX8MM board
and a 7" LVDS panel. Provide an overlay that enables the panel.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
Note: This might throw the following warnings:

Warning (graph_port): /fragment@3: graph port node name should be 'port'
Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@7/__overlay__/ports/port@0/endpoint' is not bidirectional

The following fix is available in DTC and queued in linux-next:

84b056a89d ("checks: relax graph checks for overlays")

https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=84b056a89d3c5b6cf6c5eeeafd4c4b14d6333aa9

Changes for v2:
* Update copyright year
* Use exisitng MIPI DSI output port from imx8mm.dtsi
* Fix pinctrl for GPIO hogs
* Fix property order in i2c2 node
* Use generic node name for touchscreen
---
 arch/arm64/boot/dts/freescale/Makefile        |   4 +
 .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 189 ++++++++++++++++++
 2 files changed, 193 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index f04c22b7de72e..d8af069139920 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -244,6 +244,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-tqma9352-mba93xxla.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-var-som-symphony.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
 
+imx8mm-kontron-dl-dtbs			:= imx8mm-kontron-bl.dtb imx8mm-kontron-dl.dtbo
+
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-dl.dtb
+
 imx8mm-venice-gw72xx-0x-imx219-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-imx219.dtbo
 imx8mm-venice-gw72xx-0x-rpidsi-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rpidsi.dtbo
 imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
new file mode 100644
index 0000000000000..2e40cc3852743
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "imx8mm-pinfunc.h"
+
+&{/} {
+	compatible = "kontron,imx8mm-bl", "kontron,imx8mm-sl", "fsl,imx8mm";
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm1 0 50000 0>;
+		brightness-levels = <0 100>;
+		num-interpolated-steps = <100>;
+		default-brightness-level = <100>;
+	};
+
+	panel {
+		compatible = "jenson,bl-jt60050-01a", "panel-lvds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel>;
+		backlight = <&backlight>;
+		data-mapping = "vesa-24";
+		enable-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
+		height-mm = <86>;
+		width-mm = <154>;
+
+		panel-timing {
+			clock-frequency = <51200000>;
+			hactive = <1024>;
+			vactive = <600>;
+			hsync-len = <1>;
+			hfront-porch = <160>;
+			hback-porch = <160>;
+			vsync-len = <1>;
+			vfront-porch = <12>;
+			vback-porch = <23>;
+		};
+
+		port {
+			panel_out_bridge: endpoint {
+				remote-endpoint = <&bridge_out_panel>;
+			};
+		};
+	};
+};
+
+&dsi_mux_sel_hdmi {
+	status = "disabled";
+};
+
+&dsi_mux_sel_lvds {
+	status = "okay";
+};
+
+&mipi_dsi_out {
+	remote-endpoint = <&bridge_in_dsi_lvds>;
+};
+
+&gpio3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio3>;
+
+	panel-rst-hog {
+		gpio-hog;
+		gpios = <20 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-reset";
+	};
+
+	panel-stby-hog {
+		gpio-hog;
+		gpios = <21 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-standby";
+	};
+
+	panel-hinv-hog {
+		gpio-hog;
+		gpios = <24 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-horizontal-invert";
+	};
+
+	panel-vinv-hog {
+		gpio-hog;
+		gpios = <25 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "panel-vertical-invert";
+	};
+};
+
+&hdmi {
+	status = "disabled";
+};
+
+&i2c2 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c2>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	touchscreen@5d {
+		compatible = "goodix,gt928";
+		reg = <0x5d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_touch>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <22 8>;
+		reset-gpios = <&gpio3 23 0>;
+		irq-gpios = <&gpio3 22 0>;
+	};
+};
+
+&lvds {
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			bridge_in_dsi_lvds: endpoint {
+				remote-endpoint = <&dsi_out_bridge>;
+				data-lanes = <1 2>;
+			};
+		};
+
+		port@2 {
+			reg = <2>;
+
+			bridge_out_panel: endpoint {
+				remote-endpoint = <&panel_out_bridge>;
+			};
+		};
+	};
+};
+
+&pwm1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm1>;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_gpio3: gpio3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXD3_GPIO3_IO24		0x19
+			MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20		0x19
+			MX8MM_IOMUXC_SAI5_RXD0_GPIO3_IO21		0x19
+			MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25		0x19
+		>;
+	};
+
+	pinctrl_i2c2: i2c2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C2_SCL_I2C2_SCL			0x40000083
+			MX8MM_IOMUXC_I2C2_SDA_I2C2_SDA			0x40000083
+		>;
+	};
+
+	pinctrl_panel: panelgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXFS_GPIO3_IO19		0x19
+		>;
+	};
+
+	pinctrl_pwm1: pwm1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SPDIF_EXT_CLK_PWM1_OUT		0x6
+		>;
+	};
+
+	pinctrl_touch: touchgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXD1_GPIO3_IO22		0x19
+			MX8MM_IOMUXC_SAI5_RXD2_GPIO3_IO23		0x19
+		>;
+	};
+};
-- 
2.46.0