[D18][DTBO] Add overlay for 15.6-inch display

arch/arm64/boot/dts/seco/overlays/Makefile

@@ -43,6 +43,7 @@ dtbo-$(CONFIG_ARCH_MXC) += \
 	seco-imx8mp-d18-hdmi.dtbo\
 	seco-imx8mp-d18-edp.dtbo\
 	seco-imx8mp-d18-lvds-fhd.dtbo\
+	seco-imx8mp-d18-lvds-fhd-g156han02-overlay.dtbo\
 	seco-imx8mp-d18-lvds-wsvga-fn0700d101a.dtbo\
 	seco-imx8mp-d18-lvds-wsvga-qx_070wsvgamml01d.dtbo\
 	seco-imx8mp-d18-lvds-wvga-ne070nb04f.dtbo\

arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-lvds-fhd-g156han02-overlay.dts

+/*
+ * Copyright 2024 SECO
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include "../include/imx8mp-pinfunc.h"
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "fsl,imx8mp-evk", "seco,imx8mp-d18", "fsl,imx8mp";
+
+/*  __________________________________________________________________________
+ * |                                                                          |
+ * |                          AUO G156HAN02 for D18                           |
+ * |__________________________________________________________________________|
+ */
+
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			panel_lvds: lvds_panel {
+				status = "okay";
+				compatible = "panel-lvds";
+				data-mapping = "vesa-24";
+				width-mm = <344>;
+				height-mm = <194>;
+				/* See hogging group in base DT for display_enable_pinctrl */
+				enable-gpios = <&gpio4 21 GPIO_ACTIVE_HIGH>;
+				backlight = <&pwm_backlight>;
+
+				panel-timing {
+					clock-frequency = <141000000>;
+					hactive = <1920>;
+					vactive = <1080>;
+					hfront-porch = <80>;
+					hsync-len = <24>;
+					hback-porch = <80>;
+					vfront-porch = <26>;
+					vsync-len = <20>;
+					vback-porch = <26>;
+				};
+
+				port {
+					panel_lvds1_in: endpoint {
+						remote-endpoint = <&lvds1_out>;
+					};
+				};
+			};
+
+			pwm_backlight: pwm_backlight {
+				compatible = "pwm-backlight";
+				status = "okay";
+				/* See hogging group in base DT for backlight_enable_pinctrl */
+				enable-gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
+				pwms = <&pwm1 0 100000 0>;
+				brightness-levels = < 0  1  2  3  4  5  6  7  8  9
+						     10 11 12 13 14 15 16 17 18 19
+						     20 21 22 23 24 25 26 27 28 29
+						     30 31 32 33 34 35 36 37 38 39
+						     40 41 42 43 44 45 46 47 48 49
+						     50 51 52 53 54 55 56 57 58 59
+						     60 61 62 63 64 65 66 67 68 69
+						     70 71 72 73 74 75 76 77 78 79
+						     80 81 82 83 84 85 86 87 88 89
+						     90 91 92 93 94 95 96 97 98 99
+						    100>;
+				default-brightness-level = <75>;
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&ldb>;
+		__overlay__ {
+			status = "okay";
+
+			lvds-channel@0 {
+				status = "okay";
+				fsl,data-mapping = "spwg";
+				fsl,data-width = <24>;
+
+				port@1 {
+					reg = <1>;
+					lvds1_out: endpoint {
+						remote-endpoint = <&panel_lvds1_in>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&lcdif2>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@3 {
+		target = <&ldb_phy>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	/*
+	 * The display_enable_pinctrl and backlight_enable_pinctrl are configured
+	 * in the hogging group of the base DT. Our preferred values are:
+	 * 
+	 * MX8MP_IOMUXC_SAI2_RXFS__GPIO4_IO21      0x16 (display_enable)
+	 * MX8MP_IOMUXC_GPIO1_IO06__GPIO1_IO06     0x16 (backlight_enable)
+	 */
+};