QNN EP with DSP backend is giving permission issues on Android

[kunalmohan]

I’m trying to run mobilenetv2 model using QNN DSP backend on android device with Snapdragon 855 SM8150 chipset. It has DSP backend support with hexagon architecture V66. QNN initialization is failing the following error:

vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1441:Warning 0xffffffff: remote_get_info failed to get attribute 1 for domain 3 (errno Permission denied)
type=1400 audit(0.0:12311): avc: denied { read } for name="adsprpc-smd-secure" dev="tmpfs" ino=14576 scontext=u:r:untrusted_app:s0:c72,c257,c512,c768 tcontext=u:object_r:vendor_xdsp_device:s0 tclass=chr_file permissive=0 app=ai.nimbleedge.android.sampleapp.debug
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1614: Error 0xffffffff: remote_handle_control_domain failed for request ID 2 on domain 3 (errno Permission denied)
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1441:Warning 0xe: remote_get_info failed to get attribute 257 for domain 3 (errno Success)
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1625: Error 0xffffffff: remote_handle_control failed for request ID 2 (errno Success)
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1441:Warning 0xffffffff: remote_get_info failed to get attribute 1 for domain 3 (errno Permission denied)
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1614: Error 0xffffffff: remote_handle_control_domain failed for request ID 2 on domain 3 (errno Permission denied)
vendor/qcom/proprietary/commonsys-intf/adsprpc/src/fastrpc_apps_user.c:1625: Error 0xffffffff: remote_handle_control failed for request ID 2 (errno Permission denied)
 [W:onnxruntime:ONNX  Inference Environment, qnn_backend_manager.cc:879 SetupBackend] Failed to setup so cleaning up
 [E:onnxruntime:, qnn_execution_provider.cc:691 GetCapability] QNN SetupBackend failed qnn_backend_manager.cc:356 InitializeBackend Failed to initialize backend. Error: Unknown error. QNN error handle: 4

On digging into it I came across solutions which require device to be rooted to get permissions for "tmpfs". I don’t think that’s a good idea and I’m hoping that there are better solutions to tackle this.
The references I found online:
tensorflow/tensorflow#55934 (comment)
#22288 (comment)

Any help would be appreciated!