Copy your BMP logo image to the linux root direcory and replace logo.bmp and logo_kernel.bmp . And build the logo image.
make ARCH=arm64 CROSS_COMPILE=aarch64=linux-gnu- rk3399-khadas-captain-linux.img -j12
You will get resouse.img
in root directory, and rename it to logo.img
and put it in fenix directory.