On 2023-08-31, Christopher Obbard wrote:
>   Package name    : rkbin
>   Version         : 0.0.0~git20230726.b4558da
>   Upstream Contact: Kever Yang <kever.y...@rock-chips.com>
>   URL             : https://github.com/rockchip-linux/rkbin
>   License         : Copyright © 2017-2023,Rockchip Electronics Co.,
>   Ltd. All rights reserved.
>   Programming Lang: n/a; prebuilt firmware binaries
>   Description     : Pre-built Rockchip bootloader firmware binaries (for 
> embedded targets)
>
> This package contains the Rockchip bootloader firmware binaries, primarily
> used for targets where no open-source versions is yet released.
> The pre-built firmware consists of builds of Arm Trusted Firmware, OP-TEE
> and U-Boot. There are also some closed-source tools in this repo, build for
> amd64. These will be stripped from the upstream source package as I do
> not (yet) see a need for these.

> This package is required to build U-Boot for some embedded targets such as
> rk3588, rk3566, rk3568. All of these will eventually have open-source
> firmware, but it is still useful for new processors in the future where
> U-Boot support will be merged long before the initial DRAM bringup and
> trusted firmware.

Arm Trusted Firmware for some of these rk35xx variants is now supported
in the Debian packaging and upstream. I think the only thing left for
rk3588 is the DDR training binaries from rkbin:

  
https://www.collabora.com/news-and-blog/blog/2024/02/21/almost-a-fully-open-source-boot-chain-for-rockchips-rk3588/

Not sure about the other rk35xx variants.


> I expect this package will go into non-free-firmware.

I *think* this license looks plausible for non-free-firmware:

https://github.com/rockchip-linux/rkbin/blob/master/LICENSE

  Rockchip hereby grants to you a non-exclusive license (a) to use, copy,
  distribute the Software; (b) to modify any source code as part of Software(if
  any) and sublicense, distribute such modifications.
  Except as expressively authorized by Rockchip in writing, you may NOT:
  (a) decompile, reverse-engineer, dissemble, or attempt to derive any source
  code from the Software;
  (b) remove or obscure any copyright, patent, or trademark statement or notices
  contained in the Software.

Those exclusions might make it hard for folks to come up with free
implementations, though. :(


live well,
  vagrant

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