环境：rk3568 Linux buildroot系统，接mipi屏幕。
执行/usr/bin/QLauncher报错如下：

root@rk3568-buildroot:/# /usr/bin/QLauncher
Failed to create wl_display (No such file or directory)
qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.Available platform plugins are: linuxfb, minimal, offscreen, vnc, wayland-egl, wayland.Aborted

解决方案：
vi /etc/xdg/weston/weston.ini
删除：
[output]
name=DSI-1
transform=90
重启即可。