v4l2-compliance failures

[kenfrederickson]

Hello,

I'm trying to troubleshoot issues with capturing and displaying video on an i.MX6 Sabre board.  Video drivers are not my forte.

We're using Yocto to build our bsp and I have added the v4l2-utils packages and dependencies.  A result of adding this package is the v4l2-compliance tool.  When running that tool, there are several failures.  Please see attached.  I have read in other posts that claim success despite v4l2-compliance issues. 

I also performed an strace on an application that is attempting to access /dev/video0.  Please see attached.  It is obvious that the driver is not providing some of the necessary functionality, namely VIDIOC_TRY_FMT and VIDIOC_QUERYCTRL.

My question is, do I have a broken driver that needs to be patched or are these failures normal?  Has anyone experienced this issue?

Thanks.

Original Attachment has been moved to: AppStrace.zip

Original Attachment has been moved to: v4l2ComplianceOutput.zip

[daiane_angolini]

As I know, linux-imx kernel is not completly v4l2-compliance .

What do you need? What are you trying to do? Let´s focus on what you want instead of classify compliance the the kernel?

[kenfrederickson]

Hi Daiane,

Thanks for your response.  My apologies that I didn't see it in my inbox until now!

When I encountered this problem, I was attempting to run various VOIP stacks on the and IMX6 EVM.  One was using SDL, which failed when attempting to invoke v4l.

When I am able to get back to this, I will message you again with more details on the error.

Thanks again,

Ken