Is this display different that the 800x480 one in mainline kernel? My backlight comes on and garbage is written to the display. Looks like a driver issue.
Edit: I don’t think the kernel stuff matters, the display is controlled by u-boot. This line in u-boot config must not be correct for the YFX09 display.
Kernel has this:
compatible = “urt,umsh-8596md-t”, “simple-panel”;
urt,umsh-8596md-t is a 7in display, this YFX09 one is 5in.
I bought it here: