Is it possible to invert the Pi's display?

1

New at HA here…I see xrandr is not available…

2

I’m assuming you are talking about Home Assistant OS.

xrandr is not available because there’s no X server.
You’ll need to rotate the framebuffers.

echo 1 > /sys/class/graphics/fbcon/rotate_all
  • 0 - normal orientation (0 degree)
  • 1 - clockwise orientation (90 degrees)
  • 2 - upside down orientation (180 degrees)
  • 3 - counterclockwise orientation (270 degrees)

To make this permanent, you should be able to configure uboot by adding fbcon=rotate:1 to bootargs.

Please note that I have NOT tested this.