AnsweredAssumed Answered

Fail to open /dev/video1

Question asked by shawnx on Jul 7, 2018
Latest reply on Jul 13, 2018 by aardelean

Our processor is DRA74X, with 3.02.00.03 SDK version.

At our custom board, there is video converter(ADV7611), and it's 8-bit BT656 output directly connect to Vin-3a port of DRA74X. And DRA74X use i2c-1 to control this converter.

I already modify dts file to make a connection between vin3a & ADV7611. I can see /dev/video1 by " ls /dev/video* ", but after i use " v4l2-ctl --list-device ", there is no /dev/video1.

After i use "strace" for application, the attached file is the log.     

It seems the open function fail to open /dev/video1. But i can see it through "ls /dev/video1"

What's the reason could cause this situation? And what can i do for further debug?

 

Regards,

Shawn

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