ARM: dts: imx7d-pico: Add LCD support

Add support for the VXT VL050-8048NT-C01 panel connected through
the 24 bit parallel LCDIF interface.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Joris Offouga <offougajoris@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-pico.dtsi

@@ -7,12 +7,42 @@
 #include "imx7d.dtsi"
 
 / {
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm4 0 50000 0>;
+		brightness-levels = <0 36 72 108 144 180 216 255>;
+		default-brightness-level = <6>;
+	};
+
 	/* Will be filled by the bootloader */
 	memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0>;
 	};
 
+	panel {
+		compatible = "vxt,vl050-8048nt-c01";
+		backlight = <&backlight>;
+		power-supply = <&reg_lcd_3v3>;
+
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&display_out>;
+			};
+		};
+	};
+
+	reg_lcd_3v3: regulator-lcd-3v3 {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_reg_lcdreg_on>;
+		regulator-name = "lcd-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio1 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+        };
+
 	reg_wlreg_on: regulator-wlreg_on {
 		compatible = "regulator-fixed";
 		pinctrl-names = "default";
@@ -230,6 +260,18 @@ vgen6_reg: vldo4 {
 	};
 };
 
+&lcdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lcdif>;
+	status = "okay";
+
+	port {
+		display_out: endpoint {
+			remote-endpoint = <&panel_in>;
+		};
+	};
+};
+
 &sai1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai1>;
@@ -260,6 +302,8 @@ &pwm3 {
 };
 
 &pwm4 { /* Backlight */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm4>;
 	status = "okay";
 };
 
@@ -413,6 +457,40 @@ MX7D_PAD_SAI1_RX_SYNC__I2C4_SCL		0x4000007f
 		>;
 	};
 
+	pinctrl_lcdif: lcdifgrp {
+		fsl,pins = <
+			MX7D_PAD_LCD_DATA00__LCD_DATA0		0x79
+			MX7D_PAD_LCD_DATA01__LCD_DATA1		0x79
+			MX7D_PAD_LCD_DATA02__LCD_DATA2		0x79
+			MX7D_PAD_LCD_DATA03__LCD_DATA3		0x79
+			MX7D_PAD_LCD_DATA04__LCD_DATA4		0x79
+			MX7D_PAD_LCD_DATA05__LCD_DATA5		0x79
+			MX7D_PAD_LCD_DATA06__LCD_DATA6		0x79
+			MX7D_PAD_LCD_DATA07__LCD_DATA7		0x79
+			MX7D_PAD_LCD_DATA08__LCD_DATA8		0x79
+			MX7D_PAD_LCD_DATA09__LCD_DATA9		0x79
+			MX7D_PAD_LCD_DATA10__LCD_DATA10		0x79
+			MX7D_PAD_LCD_DATA11__LCD_DATA11		0x79
+			MX7D_PAD_LCD_DATA12__LCD_DATA12		0x79
+			MX7D_PAD_LCD_DATA13__LCD_DATA13		0x79
+			MX7D_PAD_LCD_DATA14__LCD_DATA14		0x79
+			MX7D_PAD_LCD_DATA15__LCD_DATA15		0x79
+			MX7D_PAD_LCD_DATA16__LCD_DATA16		0x79
+			MX7D_PAD_LCD_DATA17__LCD_DATA17		0x79
+			MX7D_PAD_LCD_DATA18__LCD_DATA18		0x79
+			MX7D_PAD_LCD_DATA19__LCD_DATA19		0x79
+			MX7D_PAD_LCD_DATA20__LCD_DATA20		0x79
+			MX7D_PAD_LCD_DATA21__LCD_DATA21		0x79
+			MX7D_PAD_LCD_DATA22__LCD_DATA22		0x79
+			MX7D_PAD_LCD_DATA23__LCD_DATA23		0x79
+			MX7D_PAD_LCD_CLK__LCD_CLK		0x79
+			MX7D_PAD_LCD_ENABLE__LCD_ENABLE		0x78
+			MX7D_PAD_LCD_VSYNC__LCD_VSYNC		0x78
+			MX7D_PAD_LCD_HSYNC__LCD_HSYNC		0x78
+			MX7D_PAD_LCD_RESET__GPIO3_IO4		0x14
+		>;
+	};
+
 	pinctrl_pwm1: pwm1 {
 		fsl,pins = <
 			MX7D_PAD_GPIO1_IO08__PWM1_OUT   0x7f
@@ -431,6 +509,12 @@ MX7D_PAD_GPIO1_IO10__PWM3_OUT   0x7f
 		>;
 	};
 
+	pinctrl_pwm4: pwm4grp{
+		fsl,pins = <
+			MX7D_PAD_GPIO1_IO11__PWM4_OUT	0x7f
+		>;
+	};
+
 	pinctrl_reg_wlreg_on: regregongrp {
 		fsl,pins = <
 			MX7D_PAD_ECSPI1_SCLK__GPIO4_IO16	0x59
@@ -577,6 +661,12 @@ MX7D_PAD_LPSR_GPIO1_IO03__CCM_CLKO2	0x7d
 		>;
 	};
 
+	pinctrl_reg_lcdreg_on: reglcdongrp {
+	fsl,pins = <
+			MX7D_PAD_LPSR_GPIO1_IO06__GPIO1_IO6	0x59
+		>;
+	};
+
 	pinctrl_wdog: wdoggrp {
 		fsl,pins = <
 			MX7D_PAD_LPSR_GPIO1_IO00__WDOG1_WDOG_B	0x74