20-LCD功能调试
内核设备树
顶层设备树目录
$ vim longan/device/config/chips/a133/configs/c3/board.dts
// 放置于文件末尾
//#include "lcd-lvds-21-1920-1080.dtsi"
#include "lcd-lvds-7-1024-600.dtsi"
//#include "lcd-mipi-10-800-1280.dtsi"linux 路径
device/config/chips/a133/configs/c3/board.dts二级设备树目录
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/
sun50iw10p1-pinctrl.dtsi
lcd-mipi-10-800-1280.dtsi
lcd-lvds-7-1024-600.dtsi
lcd-lvds-21-1920-1080.dtsilinux 路径
kernel/linux-4.9/arch/arm64/boot/dts/sunxi/屏幕选择编译
7寸 1024 * 600 LVDS 屏 选择
#include "lcd-lvds-7-1024-600.dtsi"1920 * 1080 DUAL LVDS 屏 选择
#include "lcd-lvds-21-1920-1080.dtsi"
如：选择7寸屏软件
$ vim longan/device/config/chips/a133/configs/c3/board.dts
#include "lcd-lvds-7-1024-600.dtsi"
//#include "lcd-lvds-21-1920-1080.dtsi"
//#include "lcd-mipi-10-800-1280.dtsi"注意：lcd-*.dtsi ，同时只打开一个
LCD驱动
UBOOT
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/
mipi_800x1280.c // MIPI LCD驱动KERNEL
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/
mipi_800x1280.c // MIPI LCD驱动调试信息
查看当前显示输出的属性
cat /sys/class/disp/disp/attr/sys 示例：
# cat /sys/class/disp/disp/attr/sys
screen 0:
de_rate 300000000 hz, ref_fps:66
mgr0: 720x1280 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[1] force_sync[0] unblank direct_show[false] iommu[1]
dmabuf: cache[7] cache max[37] umap skip[0] overflow[4]
lcd output backlight(102) fps:66.5 720x1280
err:2 skip:99 irq:17699 vsync:12094 vsync_skip:0
BUF enable ch[3] lyr[0] z[0] prem[Y] a[globl 255] fmt[ 1] fb[ 736,1280; 368, 640; 368, 640] crop[ 0, 0, 720,1280] frame[ 0, 0, 720,1280] addr[fec00000,fecf0000,fed29800] flags[0x 0] trd[0,0]
depth[ 0] disp[0]all:685, sub:685, cur:685, free:682, skip:0Last updated