Linux/AM3354: Application is not running with EGLS flag with platform.

Hello Ronak,

Could you please tell me which PSDK Linux you are using while running your application? Also, on my AM335x board, I was able to replicate your error by removing the pvrsrvkm module and running a Qt application. Please make sure the module is loaded before running your application.

Regards,
Krunal

Hello, 

Thank You for your support.

Before "sgx" support was disable from dts file. I have enable that support from dts.

So I can get below log in dmesg(kernel log)

=======================================================

root@am335x-evm:/# dmesg | grep pvr
[ 13.458033] Registering driver pvrsrvkm
[ 15.609634] [drm] Initialized pvr 1.14.3699939 20110701 on minor 1

========================================================

 

While running the application (Kernel version is 4.4.32)

========================================================

root@am335x-evm:/tmp# ./qt_application -platform eglfs
failed to load module: /usr/lib/gbm/gbm_dri.so: cannot open shared object file: No such file or directory
failed to load module: /usr/lib/gbm/gbm_gallium_drm.so: cannot open shared object file: No such file or directory
loaded module : gbm_pvr.so
found valid GBM backend : gbm_pvr.so
[ 197.873898] PVR_K:(Error): BridgedDispatchKM: Driver initialisation not completed yet.
PVR:(Error): PVRSRVBridgeCall: Failed to access device. Function ID:3223086849 (strerror returns no value.). [0, ]
PVR:(Error): PVRSRVEnumerateDevices: BridgeCall failed [0, ]
PVR:(Error): PVRSRVConnect: Unable to enumerate devices. [0, ]
PVR:(Error): Couldn't connect to services [0, ]
Could not initialize egl display
Aborted (core dumped)

========================================
root@am335x-evm:/tmp# lsmod | grep pvr
pvrsrvkm 406903 0

Please do the needful.

Regards,

Ronak

Hello Ronak,

Could you please share your steps for building and installing the sgx drivers?

Regards,
Krunal

Hi Krunal,

I have enable sgx support from the dts file. Please find below snippet for the same.

&sgx {
status = "okay";
};

And one more thing, I am running the qt application with out the "platform flag".

Do you know which platform will be selected by default?

Regards,

Ronak

Hello Ronak,

I believe you did not install the appropriate SGX drivers. For example, in PSDK Linux 5.01, using the top level Makefile please call the
following commands: "make ti-sgx-ddk-km" and "make ti-sgx-ddk-km_install". This will install the corresponding SGX kernel modules in your filesystem.

Also, if you run your application without the "-platform", wayland-egl is the default QPA.

Regards,
Krunal