IMX519 Anti-Flicker Settings?

This quad cam system is working fine, display OK focus ok.

Simply looking to fix the classic 50hz/60hz flicker issue.

There’s probably a sensor register setting that needs changing, possibly via i2c does anyone have any details.

This is a fresh install on a rPi4 2GB, took several attempts to get running, trick was to not let the Pi do the updates at the start and also to put the 3 /boot/config.txt extra lines under [ALL] at the end should anyone have problems getting started.

Just left with the flicker.

Any suggestions much appreciated.

If you want to change i2c, then you need to change the kernel source code. The register changes need to be made inside the source code. I have attached the link for your reference.