How to adjust eDP display backlight control on Genio 1200 EVK?

Yocto
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1

Hi everyone,

I am using the Genio 1200 EVK and would like to adjust the backlight brightness of the eDP display from the command line.
How to control the backlight brightness, check the maximum supported brightness, and view the current brightness level?

3

Hi Ivan,

You can control the eDP display backlight brightness on Genio 1200 EVK from the command line by accessing the backlight device under /sys/class/backlight/.

Here’s how you can do it:

1. Check available backlight devices:

ls /sys/class/backlight/

You should see a device like backlight-lcd.

2. Check current brightness level:

cat /sys/class/backlight/<device_name>/actual_brightness

3. Check maximum supported brightness:

cat /sys/class/backlight/<device_name>/max_brightness

4. Set brightness (replace <value> with a number between 0 and max_brightness):

echo <value> /sys/class/backlight/<device_name>/brightness
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