There is currently no setting to rotate the whole framebuffer.

Reference port can be modified to do the rotation on the framebuffer using PxP but ideally, the display should have a native orientation matching the natural orientation of the device. However, there are some use cases where rotation would be needed. Rotating the entire framebuffer is possible, but it comes with performance penalty, even when using PxP for acceleration.

It would be great to have compile time support in Qt for MCUs for rotating all screen assets during compilation without runtime performance hits.