Separate X11 screens for LVDS and HDMI (ZaphodHeads)

[Richard Leitner]

Hi,
I hope I'm on the correct list for such a question here.
If not, I'd be happy if someone could give me a pointer where to post 
this question.

I'm running a NXP i.MX6DL platform with the latest Linux Kernel (v5.3.y)
and X11 (xf86-video-armada). Using the default configuration from [1]
I'm able to use the HDMI and LVDS parallel on Screen 0:

root at imx6:~# xrandr
Screen 0: minimum 1 x 1, current 1600 x 480, maximum 4096 x 4096
HDMI1 connected primary 800x480+0+0 (normal left inverted right x axis y 
axis) 152mm x 91mm
    800x480       59.97*+
LVDS1 connected 800x480+800+0 (normal left inverted right x axis y axis) 
0mm x 0mm
    800x480       59.97*+

Nonetheless I want to have a separate screen for both of the interfaces,
so LVDS1 should be available on ":0.0" and HDMI1 should be available on
":0.1".

This feature is called "ZaphodHeads" for "nouveau".

Is something similar available for the i.MX6 devices using 
etnaviv/xf86-video-armada?

Any help is greatly appreciated! Thank you!

regards;Richard.L

[1] 
http://git.arm.linux.org.uk/cgit/xf86-video-armada.git/tree/conf/xorg-sample.conf?h=unstable-devel