【imx6】/dev中fb和video的对应关系

imx6q关于fb和video的设备信息

设备节点

root@myzr:/unit_tests# ls /dev/fb* -l
lrwxrwxrwx 1 root root      3 Jan  1  1970 /dev/fb -> fb0
crw-rw---- 1 root video 29, 0 Jan  1  1970 /dev/fb0
crw-rw---- 1 root video 29, 1 Jan  1  1970 /dev/fb1
crw-rw---- 1 root video 29, 2 Jan  1  1970 /dev/fb2
crw-rw---- 1 root video 29, 3 Jan  1  1970 /dev/fb3
crw-rw---- 1 root video 29, 4 Jan  1  1970 /dev/fb4
root@myzr:/unit_tests# ls /dev/video* -l
crw-rw---- 1 root video 81, 5 Jan  1  1970 /dev/video0
crw-rw---- 1 root video 81, 6 Jan  1  1970 /dev/video1
crw-rw---- 1 root video 81, 0 Jan  1  1970 /dev/video16
crw-rw---- 1 root video 81, 1 Jan  1  1970 /dev/video17
crw-rw---- 1 root video 81, 2 Jan  1  1970 /dev/video18
crw-rw---- 1 root video 81, 3 Jan  1  1970 /dev/video19
crw-rw---- 1 root video 81, 4 Jan  1  1970 /dev/video20
root@myzr:/unit_tests#

####设备名字

root@myzr:~# cat /sys/class/g