Thank you for your support of Luckfox products, and for creating the accompanying tutorial video.

I don't suppose there's any sort of TRM available for the RK3506G2? I couldn't find one at the usual spots for Rock Chip info.

Rockchip just providing a Linux port without TRM register-level reference documentation to understand the full implications of what their code is doing isn't really all that "open source friendly", unfortunately. Worse, it also blocks any hope of independent security review of their port.

As you mentioned, Rockchip's chips are indeed not open-source friendly. The TRM manuals are not publicly available to everyone, and even for critical system boot, they do not use an open-source SPL but instead rely on a closed-source miniloader. This creates certain obstacles when adapting the chips for projects like OpenWrt and Armbian.
Therefore, we position Rockchip mainly for its cost-effectiveness and rich features, with primary use in application development and basic driver development. When it comes to register-level operations or more in-depth low-level development, we lack the capability to address these issues ourselves and can only seek assistance from Rockchip.

Crocodile wrote: ↑2025-04-28 1:22 Therefore, we position Rockchip mainly for its cost-effectiveness and rich features, with primary use in application development and basic driver development. When it comes to register-level operations or more in-depth low-level development, we lack the capability to address these issues ourselves and can only seek assistance from Rockchip.

Yes, it's unfortunate, they could be quite the powerhouse were it not for their reticence about providing basic docs like TRMs and register-level reference docs. Oh well, got 2x of the 3506G2/G3 and 1x of the 1106 (for which there is a TRM available), so guess I'll focus on 1106 for now, and see whether 3506 situ improves over time.