Mainline u-boot

#1

fyi
work on mainline u-boot
https://lists.denx.de/pipermail/u-boot/2023-January/506784.html

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#2

Noob question: Does U-boot means being able to boot an image via USB instead of Micro SD, Emmc?

#3

You can for example have uboot on sd card
that will boot kernel from USB :slight_smile:

And I think that you can boot from USB
https://wiki.radxa.com/Rock5/install/spi

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#4

I havent tried via usb only emmc and micro sd

#5

Awesome to see this is being worked on! Any idea if this work will include fixes for the usb power delivery negotiation issues? As I understand, the PD is handled on a separate chip, so you could have full support for RK3588 without solving Rock 5b power delivery issues. I could be wrong though.

#6

Looking at the commits, I don’t see any reference to fusb302, so I don’t think there will be much difference in terms of PD negotiation

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#7

I added builds for the Collabora mainline fork to my Rock 5 Docker build repo

Run the following (no need to clone anything, just need Docker installed):

docker buildx bake \
   'https://github.com/milas/rock5-toolchain.git' \
   u-boot-collabora

You’ll get an out/ directory created on your machine (i.e NOT an image, the bake target will output the files locally):

out
└── u-boot
    └── collabora
        ├── idbloader.img
        ├── rk3588_spl_loader_v1.08.111.bin
        ├── spi
        │   └── spi_image.img
        └── u-boot.itb

(More details in the readme, bake u-boot will build both Radxa & Collabora, bake u-boot-radxa will just build Radxa U-Boot.)

I’m hoping to do some testing with it today, but at this point I just got everything set up for building :upside_down_face:

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#8

The rock5b was added 28 February to mainline u-boot.

Does anyone already have any experience to share?

sdhci enabled, but sdmmc seems disabled?