Am Freitag, den 22.04.2016, 15:21 +0300 schrieb Ivan Nikolaenko:
Hi, Phillip!
Thank you for the fast responce. Ifollowed your adviceandrealized thatIincorrectlyformulatedthought. I need a 180 degree rotation, not the flip. I got the vertical flip (screen reflected by Y axis), butmy attempt to reflect it by X axis (xrandr --output DISP3\ BG --reflect x) failed (nothing happened).
That is because the IDMAC controller considers the VF bit when calculating the line start addresses (so reflect Y works) but completely ignores the HF bit. The IC has a line buffer that is sampled backwards if the HF bit is set.
Is there a way to do 180deg rotation somehow?
If your display is < 1024 pixels in both width and height, it should be possible to get reflect x functionality by hooking up the IC -> DMFC direct flow.
regards Philipp