Official RPI Touchscreen, control screen blanking without disabling it

[mmmmh]

The official Raspberry Pi touchscreen activates a screensaver without documented settings. The screen wakes up when touched. Generally, I would like to keep it that way but I also want to be able to wake up the screen programmatically. If possible, I would also like to tweak the activation time.

I know how to turn the backlight on and off and how to dim the screen but does anyone know how to manage this screensaver?