U-Boot with direct NVMe boot support for eMMC/SPI Flash

[Arglebargle]

While it's possible to place the boot partition on eMMC and use NVMe as rootfs, the lack of NVMe support in stock U-Boot kept bugging me, so I decided to do something about it.

So, by porting Rockchip PCIe patches from Radxa and backporting some NVMe patches from upstream U-boot, I was able to get NVMe support going on ayufan's fork and now can successfully boot from my NVMe drive:


Of course, since SPI flash is a no-go for now, U-Boot lives on eMMC: you still have to keep it connected. But that's a start.

You can find binary images and source code here.
As usual, I am not responsible for any damage or data loss caused by using these images. They work for me.
Don't flash it if you don't know how to recover from damaged bootloader and can't be bothered to search for recovery options.

What order is U-Boot configured to check devices for extlinux.conf/boot scripts? If you haven't already could you set it so that it looks for a boot script/config from SD > NVMe > eMMC ?

I'm writing install scripts for the Ubuntu images to make the process less error-prone and it'd be hugely helpful if we could get as many of the PBP U-Boot boot orders aligned so that they do roughly what most users expect when they pop an SD card in to boot.

Thanks for working on this, apologies for immediately piling on and asking for more.