mircsicz

FWIW, on my rk3588 devices the NPUs are working with recent mainline releases:
[ 5.967316] [drm] Initialized rocket 0.0.0 for rknn on minor 0 [ 5.975499] rocket fdab0000.npu: Rockchip NPU core 0 version: 1179210309 [ 5.978652] rocket fdac0000.npu: Rockchip NPU core 1 version: 1179210309 [ 5.985602] rocket fdad0000.npu: Rockchip NPU core 2 version: 1179210309 This script runs the Mesa example with the latest available working versions:
And with this script, the Mesa example runs, with a small adjustment, also with the TFLite successor LiteRT:
A MediaPipe sample can also be set up easily:
But unfortunately, the MediaPipe framework does not support the extended delegate functionality of LiteRT (TFLite).
And therefore no NPU support.
classification-3.11-tflite.logclassification-3.13-litert.logobject_detection-3.12-litert.log

You can switch to beta to get faster updates, though they're untested autobuilds, so if something breaks, you have to unbrick yourself.
 

As you have mentioned in chat you tried this with mainline 6.10.y which I don't expect to even work. Support for rk3588 soc is still under heavy development and I don't think anything NPU related has been pushed upstream yet.
 
You should try with 6.1.y vendor kernel. Why? https://docs.armbian.com/User-Guide_FAQ/#why-does-hardware-feature-xy-work-in-old-kernel-but-not-in-more-recent-one