Difference between revisions of "Rock/display"
< Rock
| Line 7: | Line 7: | ||
=== set display scale === | === set display scale === | ||
| − | root@radxa:~# cd /sys/devices/platform/rk-fb/graphics/fb0 | + | root@radxa:~# '''cd /sys/devices/platform/rk-fb/graphics/fb0''' |
| − | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# cat scale | + | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# '''cat scale''' |
xscale=95 yscale=95 | xscale=95 yscale=95 | ||
| − | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# echo xscale=100 > scale | + | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# '''echo xscale=100 > scale''' |
| − | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# echo yscale=100 > scale | + | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# '''echo yscale=100 > scale''' |
| − | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# cat scale | + | root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# '''cat scale''' |
xscale=100 yscale=100 | xscale=100 yscale=100 | ||
=== set HDMI output mode === | === set HDMI output mode === | ||
| − | root@radxa:~# cd /sys/class/display/display0.HDMI | + | root@radxa:~# '''cd /sys/class/display/display0.HDMI''' |
you can see supported output modes by the following commands: | you can see supported output modes by the following commands: | ||
| − | root@radxa:/sys/class/display/display0.HDMI# cat modes | + | root@radxa:/sys/class/display/display0.HDMI# '''cat modes''' |
1920x1080p-60 | 1920x1080p-60 | ||
1920x1080p-50 | 1920x1080p-50 | ||
| Line 26: | Line 26: | ||
720x480p-60 | 720x480p-60 | ||
check out the current display mode | check out the current display mode | ||
| − | root@radxa:/sys/class/display/display0.HDMI# cat mode | + | root@radxa:/sys/class/display/display0.HDMI# '''cat mode''' |
1280x720p-60 | 1280x720p-60 | ||
It's 720p@60hz | It's 720p@60hz | ||
change the mode to 1080p@60hz | change the mode to 1080p@60hz | ||
| − | root@radxa:/sys/class/display/display0.HDMI# echo 1920x1080p-60 > mode | + | root@radxa:/sys/class/display/display0.HDMI# '''echo 1920x1080p-60 > mode''' |
Revision as of 05:11, 8 March 2014
The cpu of Radxa Rock - RK3188 has two LCD controllers, LCD0 and LCD1. On RR, LCD1 is connected to HDMI and LCD0 is connect to AV out and the LCD0 signal are also exported on the extension header.
There is some sysfs interface exported to control the display related stuff. The following should work on both Android and Linux.
set display scale
root@radxa:~# cd /sys/devices/platform/rk-fb/graphics/fb0 root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# cat scale xscale=95 yscale=95 root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# echo xscale=100 > scale root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# echo yscale=100 > scale root@radxa:/sys/devices/platform/rk-fb/graphics/fb0# cat scale xscale=100 yscale=100
set HDMI output mode
root@radxa:~# cd /sys/class/display/display0.HDMI
you can see supported output modes by the following commands:
root@radxa:/sys/class/display/display0.HDMI# cat modes 1920x1080p-60 1920x1080p-50 1280x720p-60 1280x720p-50 720x576p-50 720x480p-60
check out the current display mode
root@radxa:/sys/class/display/display0.HDMI# cat mode 1280x720p-60
It's 720p@60hz
change the mode to 1080p@60hz
root@radxa:/sys/class/display/display0.HDMI# echo 1920x1080p-60 > mode