Raspberry Pi EEPROM updates and Boot2Qt Yocto boot file compatibility issues

[Dean_Wittmann]

I hope someone else has had the same issue, and being Pi day (3/14/2022), I thought I'd ask this question for anyone that may have a solution:

I have Boot2Qt 5.15.4 on a microSD booting on an older (2019 - 2021) Raspberry Pi 4B, no problems.

I have recently purchased a new Raspberry Pi 4B that has an updated EEPROM (1/25/2022) and now the same microSD image will not boot with this new EEPROM code.

Is there a way to make the boot files for Boot2Qt 5.15.4 compatible with newer Raspberry Pi 4B EEPROM updates?

[Dean_Wittmann]

I'm replying to my own post with an answer that worked for me:
Because I'm booting from microSD on the Raspberry Pi 4B, and from articles read elsewhere on the web, I found out that all I needed to do was to replace 2 files in the boot partition: start4x.elf and fixup4x.dat, both files can be found at github.com/raspberrypi/firmware/tree/master/boot.
This worked for my Boot2Qt 5.15.4 Yocto bootup issue with a newer Raspberry Pi 4B with an updated boot EEPROM (dated 01/25/2022).
Thanks, I hope this helps others.