AM625: Display mirrored with left half screen

HI,
This most likely is a software issue.

Tony Tang said:

There is one custom board display mirrored the left half screen on power up, and can't resume without power cycle, the abnormal rate is high.

I didn't fully understand what you mean by this. Does the display hang for the first time with screen split and resume to normal on reboot?

To isolate user-space vs driver issue, can you try running the following and share the console as well as display output:
kmstest --flip
kmscube

What is the output of:
devmem2 0x3020a160

Can you try disabling splash in UBoot using https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/latest/exports/docs/linux/Foundational_Components/U-Boot/UG-Splash-Screen.html#disabling-splash-screen and reboot to see if it helps?

Divyansh Mittal said:

I didn't fully understand what you mean by this. Does the display hang for the first time with screen split and resume to normal on reboot?

Yes, it hang on power up, not during working. and can resume to normal on reboot

Customer updated to me, they capture screen/buffer from QT, the display content is right.

I will let customer follow your steps next week and update here.