"LVGL 8.2 DRM screen inversion failed"

Main Chip: RK3566
Screen Chip: ILI9881C (does not support 90-degree rotation)
Screen Resolution: 720x1280
The screen chip does not support switching between landscape and portrait modes.

In LVGL, I am trying to achieve landscape mode via software, using drm_flush. I modified drm_flush, but the rendering results are always incorrect.