Rknpu kernel module doesn't run correctly

hi,

I runs E25 using radxa ubuntu server image. After apt updating, I try to run nputest, but it fails.
cf. https://wiki.radxa.com/Rock3/dev/npu-run-test

It seems that rknpu module has problem…?

rock@radxa-e25:~/rknn_ssd_demo_Linux$ ./rknn_ssd_demo model/RK356X/ssd_inception_v2.rknn model/bus.jpg
resize 640 640 to 300 300
Loading model ...
rknn_init ...
E RKNN: [13:20:51.589] failed to open rknpu module, need to insmod rknpu dirver!
E RKNN: [13:20:51.590] failed to open rknn device!
rknn_init fail! ret=-1
rock@radxa-e25:~/rknn_ssd_demo_Linux$ sudo modprobe rknpu
rock@radxa-e25:~/rknn_ssd_demo_Linux$ ./rknn_ssd_demo model/RK356X/ssd_inception_v2.rknn model/bus.jpg
resize 640 640 to 300 300
Loading model ...
rknn_init ...
E RKNN: [13:22:41.561] failed to open rknpu module, need to insmod rknpu dirver!
E RKNN: [13:22:41.561] failed to open rknn device!
rknn_init fail! ret=-1
rock@radxa-e25:~/rknn_ssd_demo_Linux$
rock@radxa-e25:~/rknn_ssd_demo_Linux$ lsmod | grep rknpu

You can use the latest built image here, and remove the overlay “rk3568-disable-npu”