[seaniko7]

I'm writing directly to epdc framebuffer, also I used imx xorg display driver instead of fbdev.

Scren updates are handled by screen_updater daemon, which constatnly refreshes screen at 1bpp (~300ms) or 4bpp (~900ms). Moreover, it can be configured to check which parts of screen changed and perform partial update.
I need to write gui control panel which will use domain sockets or dbus to change screen_updater preferences...