V831没有RGB也没有MIPI，正好手上有几片i80 MCU屏幕可以用（320*480 3.5寸的，15块钱一片）
电路部分
屏幕部分：
主控部分：
没啥好说的，照着Sipeed的抄就行了
配置设备树
lcd0: lcd0@01c0c000 {
lcd_used = <1>;
lcd_driver_name = "ili9481";
lcd_x = <320>;
lcd_y = <480>;
lcd_width = <108>;
lcd_height = <64>;
lcd_dclk_freq = <5>;
lcd_pwm_used = <0>;
lcd_hbp = <20>;
lcd_ht = <382>;
lcd_hspw = <2>;
lcd_vbp = <2>; // 320
lcd_vt = <486>; // 320
lcd_vspw = <2>;
lcd_if = <1>;
lcd_frm = <2>;
lcd_cpu_mode = <1>;
lcd_cpu_te = <0>;
lcd_cpu_if = <14>;
lcd_io_phase = <0x0000>;
lcdgamma4iep = <22>;
lcd_gamma_en = <0>;
lcd_cmap_en = <0>;
lcd_bright_curve_en = <0>;
lcd_rb_swap = <0>;
lcd_gpio_0 = <&pio PH 5 1 0 3 0>; /* rst */
lcd_gpio_1 = <&pio PD 21 1 0 3 0>; /* cs */
lcd_bl_en = <&pio PH 6 1 0 3 1>;
pinctrl-0 = <&rgb8_pins_a>;
pinctrl-1 = <&rgb8_pins_b>;
};
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因为这里用的是Kernel刷屏，所以就不配uboot的了
驱动
然后找大佬鼠嫖驱动，放到 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/文件夹下。
编辑 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.c，找一个顺眼的地方加一下配置。
#ifdef CONFIG_LCD_SUPPORT_ILI9481
&ili9481_panel,
#endif
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编辑lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.h，找一个顺眼的地方加一下配置。
#ifdef CONFIG_LCD_SUPPORT_ILI9481
extern struct __lcd_panel ili9481_panel;
#endif
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编辑lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/Kconfig，找一个顺眼的地方加一下配置。
config LCD_SUPPORT_ILI9481
bool "LCD support ili9481 panel"
default n
---help---
If you want to support ili9481 panel for display driver, select it.
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编辑 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/Makefile，找一个顺眼的地方加一下配置。
disp-$(CONFIG_LCD_SUPPORT_ILI9481) += lcd/ili9481.o
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再打开 m kernel_menuconfig
Device Drivers --->
Graphics support --->
Frame buffer Devices --->
Video support for sunxi --->
LCD panels select --->
[*] LCD support ili9481 panel
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保存，编译kernel打包就好了。
启动系统
刷卡，启动系统，可以看到屏幕背光已经亮了。
测试一下
echo 1 > sys/class/disp/disp/attr/colorbar
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驱动和配置已经上传Github，自取
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