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113-i调屏方法整理

2024-1-29 11:53| 发布者: shuishui| 查看: 151| 评论: 0

类目： T113i系列产品 > linux 文档编号: 1288

开发平台：飞凌113i-S开发板

113i屏幕修改需要分别修改内核以及uboot，下面我们以lvds1024*600的屏幕为例

1.进入如下路径

forlinx@ubuntu:~/work/OK113i-linux-sdk$ cd kernel/linux-5.4/arch/arm/boot/dts/

2.打开 OK113I-C-Linux.dts

forlinx@ubuntu:~/work/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/boot/dts$ vi OK113I-C-Linux.dts

3.修改分辨率参数如下面所示（具体参数请参考您使用的屏幕的屏体手册）：

elif (DISP_TYPE == 5)

// lvds 1280x800

&lcd0 { lcd_used = <1>; status = "okay";

lcd_driver_name = "default_lcd";

lcd_backlight = <150>;

lcd_if = <3>;

lcd_x = <1024>;

lcd_y = <600>;

lcd_width = <210>;

lcd_height = <135>;

lcd_dclk_freq = <71>;

lcd_pwm_used = <1>;

lcd_pwm_ch = <3>;

lcd_pwm_freq = <20000>;

lcd_pwm_pol = <1>;

lcd_pwm_max_limit = <255>;

4.修改完成后保存并退出，然后开始修改uboot，进入如下路径

forlinx@ubuntu:~/work/OK113i-linux-sdk$ cd brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/bootGUI/

5.打开display-menu.c

forlinx@ubuntu:~/work/OK113i-linux-sdk/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/bootGUI$ vi display_menu.c

6.修改分辨率参数如下方所示：

void bootup_menu_setprop_by_lcd_lvds_1280_800(int kernel)

{

int offset_node = 0;

unsigned int phandle0 = 0;

unsigned int phandle1 = 0;

bootup_hal_save_lcd_to_kernel("lcd_used", FDT_UINT_VALUE, 1, NULL);

bootup_hal_save_lcd_to_kernel("lcd_if", FDT_UINT_VALUE, 3, NULL);

bootup_hal_save_lcd_to_kernel("lcd_driver_name", FDT_STRING_VALUE, 0, "default_lcd");

bootup_hal_save_lcd_to_kernel("lcd_x", FDT_UINT_VALUE, 1024, NULL);

bootup_hal_save_lcd_to_kernel("lcd_y", FDT_UINT_VALUE, 600, NULL);

bootup_hal_save_lcd_to_kernel("lcd_width", FDT_UINT_VALUE, 210, NULL);

bootup_hal_save_lcd_to_kernel("lcd_height", FDT_UINT_VALUE, 135, NULL);

bootup_hal_save_lcd_to_kernel("lcd_dclk_freq", FDT_UINT_VALUE, 71, NULL);

7.修改完成后，在源码初始路径下编译uboot

forlinx@ubuntu:~/work/OK113i-linux-sdk$ ./build.sh brandy

8. 编译成功后进行全编译./build.sh

forlinx@ubuntu:~/work/OK113i-linux-sdk$ ./build.sh

9.执行成功后./build.sh pack打包镜像烧录到板子上观察现象。

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