Boot Order in Pinebook Pro

[DrYak]

I would avoid the SPI flash.

Nowadays (2025), there's the solution of flashing RK2AW on the SPI alongside U-boot

Megi made pre-bootloader/menu that will check if there are bootloaders on the SD card or on the eMMC and those will take precedence, other wise it has 2 backup copies of U-Boot next to it.

So you can flash that on the SPI, and if something goes wrong in the U-Boot you flashed, or if you merely need a different U-Boot for a different OS, you can simply pop a SD card with it and it will boot.

See here for a package containing rk2aw, opensource U-boot, and U-boot with Rockchip's binary memory initialisation:
https://xff.cz/kernels/bootloaders/ (new item: https://xnux.eu/log/091.html )