On Mon, Dec 05, 2016 at 09:26:27AM +0200, Ran Shalit wrote:
Hello,
I am trying to turn off screen using sysfs entries, but I'm having some difficulties with it:
1. command: echo 0 > /sys/devices/platform/s5p-dsim.0/ea8061/backlight/panel/brightness result: screen is dimmed - BUT not turned off
2. command: cat /sys/devices/platform/s5p-dsim.0/ea8061/backlight/panel/actual_brightness 20
This strengthen the fast that we didn't turned off brightness completely
3. In this point I though that maybe I can turn off the whole brightness device
ls /sys/devices/platform/s5p-dsim.0/ea8061/backlight/panel/ actual_brightness auto_brightness bl_power brightness device dimming max_brightness power subsystem type uevent
I made some trials , but didn't made it turned off yet. Is there any idea if it's possible to turn it off completely ?
If the driver supports power management, then you can control the power state with the power/runtime_status sysfs entry. Some of the sysfs entries in the power/ directory are documented in Documentation/ABI/testing/sysfs-devices-power. Brian