Linux/PROCESSOR-SDK-AM437X: Dual camera demo failure

Ken Li43

Part Number: PROCESSOR-SDK-AM437X
Other Parts Discussed in Thread: AM4378

Tool/software: Linux

Hello,

I am runing SDK 04.03.00.05 on AM437x EVM. I got failure with black screen. when toucking the Dual Camera demo in Matrix. So I run /usr/bin/dual_camera.sh I got the error message: (I installed the camera board)

root@am437x-evm:/usr/bin# ./dual_camera.sh
Stopping Matrix GUI application.
USAGE: -platform linuxfb <use_cmem flag>

Set the use_cmem flag to 1 to allocate memory from CMEM driver. By default it is set to 0

CRTCs size: 800x480

Capture 0: Opened Channel

Capture 0: Capable of streaming

Capture 0: Init done successfully

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 47

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 48

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 49

Capture 1: Opened Channel

Capture 1: Capable of streaming

Capture 1: Init done successfully

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 50

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 51

Allocating memory from OMAP DRM pool
fourcc:1448695129, fb_id 52
Running the demo on am437x processor
w=800, h=600
w=800, h=600
ERROR:drm_init_dss:831: ret from drmModeAtomicCommit = -13

Using Wayland-EGL
ERROR:drm_restore_props:712: ret from drmModeAtomicCommit = -13

wlpvr: PVR Services Initialised

Please help!

Thanks,

-Ken L

over 7 years ago

0 Manisha Agrawal over 7 years ago

TI__Mastermind 22946 points

Hi Ken,

Please stop weston before running dual camera demo. Dual camera demo needs ownership of DRM resource. When weston is running it owns the DRM resource and doesn't let dual camera demo set DSS kernel mode settings.

#/etc/init.d/weston stop

0 Ken Li43 over 7 years ago in reply to Manisha Agrawal

Intellectual 895 points

Thank you for replying. I use a serial port connection to the AM4378 GP EVM. then:

boot EVM with Matrix GUI on LCD.

run the command /etc/init.d/weston stop.

run dual camera demo on Matrix, it still displays black(still can see PIP frame).

I also try stop weston and then stop Matrix (/etc/init.d/matrix-gui-2.0 stop) and restart Matrix (/etc/init.d/matrix-gui-2.0 start) still no luck.

I also try to refresh Matrix cache from the Matrix app Settings, no luck too.

Please help.

Thanks,

-Ken

0 Ken Li43 over 7 years ago in reply to Ken Li43

Intellectual 895 points

I am sorry please discard my previous reply. I didn't run weston stop command correctly.

As matter of fact after I run the weston stop command correctly on the serial port terminal the Matrix GUI on the LCD just disappeared and LCD displays "Plaesae Wait..." forever. I have to run /etc/init.d/weston start to recover the DVM to wayland desktop.

Thanks,

-Ken Li

0 Manisha Agrawal over 7 years ago in reply to Ken Li43

TI__Mastermind 22946 points

Hi Ken,

Is dual camera demo running now?

Regards,
Manisha

0 Ken Li43 over 7 years ago in reply to Manisha Agrawal

Intellectual 895 points

Hello Manisha,
I just remove the Matrix start up script in rc2.d and run dual camera demo stand alone when the EVM is up. It works now. But I still can't run it within Matrix because Matrix wouldn't run if weston is stopped.

If you know the way to run it within Matrix Please help. Otherwise I will close it ticket with "resolved".

Thank you.

Thanks,

-Ken Li

0 Manisha Agrawal over 7 years ago in reply to Ken Li43

TI__Mastermind 22946 points

Hi Ken,

You don't need to stop weston when running dual camera demo through Matrix. Weston is needed to be stopped only when running the demo outside Matrix. When launched through the Matrix, the script that launches the dual camera demo application takes care of stopping the weston, running the application and then restarting the weston after application quits.

Regards,
Manisha

0 Ken Li43 over 7 years ago in reply to Manisha Agrawal

Intellectual 895 points

Thank you very much.

0 Ken Li43 over 7 years ago in reply to Ken Li43

Intellectual 895 points

thank you.

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Linux/PROCESSOR-SDK-AM437X: Dual camera demo failure