Rockchip

toolchain

partial (NPU SDK on GitHub but proprietary RKNN license + prebuilt blobs, rknpu kernel driver open)

datasheets

public (full TRM + datasheet public, no NDA)

blobs

required (proprietary GPU/NPU firmware)

Documentation is unusually open (full TRM and datasheet public) and the RKNN toolkit is openly distributed, but the SDK ships as prebuilt binaries under a proprietary license with closed firmware. The brief datasheet downloads straight from rock-chips.com with no registration or NDA, the RKNN SDK licence in airockchip/rknn-toolkit2 is the proprietary "RKNN SDK License" (no reverse engineering, use restricted to Rockchip products), and rkbin distributes the DDR/BL31/OPTEE firmware as prebuilt binaries.

• https://www.rock-chips.com/uploads/pdf/2022.8.26/192/RK3588%20Brief%20Datasheet.pdf recorded 2026-08-13

  Rockchip's own RK3588 brief datasheet, downloadable from rock-chips.com with no registration or NDA - block diagram, quad Cortex-A76 + quad Cortex-A55, Mali-G610 MP4, High Performance NPU, LPDDR4/LPDDR4X/LPDDR5 quad-channel

• https://github.com/airockchip/rknn-toolkit2/blob/master/LICENSE recorded 2026-08-13

  "RKNN SDK License" - a Rockchip proprietary agreement granting use only for applications compatible with Rockchip products and forbidding decompiling or reverse-engineering the Software

• https://github.com/rockchip-linux/rkbin recorded 2026-08-13

  Rockchip's own "Firmware and Tool Binarys" repository - prebuilt SPL/DDR/UsbPlug/BL31/BL32/OPTEE boot binaries distributed as binaries rather than source

• https://www.rock-chips.com/a/en/products/RK35_Series/2022/0926/1660.html recorded 2026-08-13

  "6TOPS NPU, triple core, support int4/int8/int16/FP16/BF16/TF32 acceleration"; 8nm process, quad-core Cortex-A76 + quad-core Cortex-A55; ARM Mali-G610 MC4