[SOLVED] Waveshare 5.5 AMOLED HDMI Display - screen rotate

[dewen]

Hi :
I just installed Moode 9.2.6 on my Raspberry Pi 5 and encountered some issues, 
so I need help on the forum.

I’m using a Waveshare 5.5-inch AMOLED HDMI display.
Its native resolution is 1080x1920 in portrait mode.
   
I can adjust the screen orientation in the "Peripheral Setup" section,
but for HDMI display, it only offers "landscape" and "portrait" modes.

   
Currently, the display is in horizontal mode if I set the screen orientation to "portrait",
but it's upside down.
   

Is there a way to rotate it 180 degrees? ( e.g. command to rotate 90,180,270 degree )

Thank you !