Hi @Merlin,
just for curiosity - where exactly CONFIG_LOGO_LINUX_CLUT224=y is set? In the past, I was trying to patch arch/arm64/configs/toradex_defconfig to make CONFIG_LOGO_CUSTOM_CLUT224 active. I also tried to modify the defconfig file and replace the original .config file during kernel compilation with it. Without any success.
How to use defconfig file to apply your custom kernel configuration correctly is described in this thread. The solution was found. I personally prefer to use fragments to update kernel config. Please see my post related to kernel logo configuration.
Best regards,
John