Switch presentation and built-in display

[Вукашин Ристић]

Hi everybody,

I have an issue and I need to switch functions between HDMI and LCD display. 

Android applications always use secondary display for presentations. 

However, in my use case I must to use HDMI as primary display. This is because android doesn't scale image well form lower to bigger framebuffer.

So I need to underlay HDMI display for presentation view and use LCD as default, built-in display, but from Android system. In kernel parameters I need to have HDMI as primary and LCD as secondary display. 

Because I need to have better overscan from higher to lower resolution. 

Dose somebody play with this before? 

Thanks in advance. 

Best regards, Vukasin