Rock/display

2014-03-26T12:39:49Z

Mpps: /* Set HDMI console font */

{{Languages|rock/display}}

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:# cat /sys/devices/platform/rk-fb/graphics/fb0/scale
xscale=95 yscale=95
root@radxa:# echo xscale=100 > /sys/devices/platform/rk-fb/graphics/fb0/scale
root@radxa:# echo yscale=100 > /sys/devices/platform/rk-fb/graphics/fb0/scale
root@radxa:# cat /sys/devices/platform/rk-fb/graphics/fb0/scale
xscale=100 yscale=100

=== set HDMI output mode ===
you can see supported output modes by the following commands:
root@radxa:# cat /sys/class/display/display0.HDMI/modes
1920x1080p-60
1920x1080p-50
1280x720p-60
1280x720p-50
720x576p-50
720x480p-60
check out the current display mode
root@radxa:# cat /sys/class/display/display0.HDMI/mode
1280x720p-60
It's 720p@60hz

change the mode to 1080p@60hz
root@radxa:# echo 1920x1080p-60 > /sys/class/display/display0.HDMI/mode

=== Set font size of X and console ===
Change DPI to increase the font size in X
rock@radxa:~$ sudo nano ~/.Xresources

add the following lines:
! Xft settings
Xft.dpi: 120
Xft.antialias: true
Xft.rgba: rgb
Xft.hinting: true
Xft.hintstyle: hintslight

Change the console settings:
rock@radxa:~$ sudo dpkg-reconfigure console-setup
Go through the setup: hit enter, hit enter, choose the font and hit enter, hit enter, choose size and hit enter

Switch to console via ctrl+alt+f1 and verify your settings:
root@radxa:~# setupcon
Find the best solution by repeating the console-setup...

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Rock/display