Linux/AM3354: Qt5 camera demo fails

Hello,

Please check this e2e thread Manisha's answer:
e2e.ti.com/.../605939

However, I tried on my side
./video-graphics-test -platform eglfs
I see the captured video on display.

The steps to try this demo on host machine:
cd ti-psdk
make video-graphics-test
cd example-applications/
ls
You should see video-graphics-test-1.0 dir cp to the board.
On the board you should stop weston and execute ./video-graphics-test -platform eglfs

Hope this helps.

BR
Margarita

Hi Margarita

     my sdk is processor sdk 03.02.00.05

     but i searched for video-graphics-test. and can not find it inside my own sdk.

     here's what my sdk looks like:

yandong@yandong-VirtualBox:~/tisdk$ ll
total 116
drwxr-xr-x  8 yandong yandong  4096  6月 21  2017 ./
drwxr-xr-x 22 yandong yandong  4096  2月 26 15:24 ../
drwxr-xr-x  6 yandong yandong  4096  6月 23  2017 build/
drwxr-xr-x  7 yandong yandong  4096  6月 12  2017 configs/
drwxr-xr-x  4 yandong yandong 57344  1月 10 12:58 downloads/
drwxr-xr-x  8 yandong yandong  4096  6月 23  2017 .git/
-rw-r--r--  1 yandong yandong    59  6月 12  2017 .gitignore
-rwxr-xr-x  1 yandong yandong 24682  6月 12  2017 oe-layertool-setup.sh*
drwxr-xr-x  3 yandong yandong  4096  6月 12  2017 sample-files/
drwxr-xr-x 10 yandong yandong  4096  6月 12  2017 sources/

  
  normally i need to call bitbake in order to make something.like:

  MACHINE=am335x-evm bitbake arago-core-tisdk-image

  but i can't just "make" things directly.cause there's no makefile in the root directory of the tisdk.

  i have no clue here.maybe processor sdk 03.02.00.05 is not equipped with video-graphics-test?

  Another clue is:

  because i run the camera demo application.Here's what i did:

 systemctl disable matrix-gui-2.0.service
 systemctl disable weston.service
 source /setqt5-env.sh
 /usr/share/qt5/examples/multimediawidgets/camera/camera

  so i was suspecting that is it because i disabled weston?

  so i changed the steps to:

 systemctl disable matrix-gui-2.0.service
 source /setqt5-env.sh
 /usr/share/qt5/examples/multimediawidgets/camera/camera

 And now i have some new logs coming out:

root@am335x-evm:/# /usr/share/qt5/examples/multimediawidgets/camera/camera
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
Could not set DRM CRTC mode! (Permission denied)
procPageFlipReq(): failed to add crtc atomically (Permission denied)
Failed to start video surface due to main thread blocked.
Failed to start video surface due to main thread blocked.

the logs in red are new logs i have never seen before.

if i stopped weston. but without disabling it.

like:

/etc/init.d/weston stop

and re-run the demo.

it's still not working.

the only change is that the following log has gone:

Could not set DRM CRTC mode! (Permission denied)
procPageFlipReq(): failed to add crtc atomically (Permission denied)
Failed to start video surface due to main thread blocked.
Failed to start video surface due to main thread blocked.

Hello,

semiyd said:

Could not set DRM (4) CRTC (24) mode! (Permission denied)

This depends on QPA.

The QT5 in PSDK is prebuilt with Wayland enabled and therefore wayland-egl is the default QPA. In this case weston should running.

If you want QT application without Weston(weston stop), you can use  “- platform” option to specify the desired QPA  for exmaple eglfs.

Please when I have the other answers I will get back to you.

BR
Margarita

Hi

    i think my environment setting included this line :

   export QT_QPA_PLATFORM=eglfs:/dev/fb0

   which is not compliant with the wayland/weston thing....

   so i did another test.

   without running my own environment setting script.

  just run the demo after the weston is started.

root@am335x-evm:/# /usr/share/qt5/examples/multimediawidgets/camera/camera

Using Wayland-EGL
wlpvr: PVR Services Initialised

  this time the camera demo can run with the weston running.

  the screen look like this:

but still no preview.

but at least this prooves that the reason is not because of the demo not being able to run while weston is running.

thanks