The capture of tx2 is abnormal when video source pluged again after unpluged

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hello,

The capture of tx2 is normal.But it’s abnormal when video source pluged again after unpluged.
How to solve it?

Thank you very much!

2

Please share clear steps.

3

Hello DaneLLL,

Thank you very much for your reply.

In tx2,there is no video after the restart of camera during the video capture.
I restart the application and then get video. But this problem doesn’t happen on the tx1.

I think the kernel source of tx2 might have a bug.I think that the vi tegra channel don’t reset normally.
The function tegra_channel_error_worker() I trace by checking the code only have vi4_power_off() and don’t have vi4_power_on(). I think it’s the reson of my problem.

I will be grateful for any of your suggestions.

4

hello 2284810331,

suppose you’re working with hot-plug device, something like hdmi-in.
since tx1 and tx2 were using different VI kernel architecture, the behavior should be inconsistent.
please share your detail steps, and also kernel messages during the issue reproduced.
thanks

5

hi JerryChang,

Thank you very much for your reply.

I’m working with hot-plug.
The version of my kernel source is R28.1.
The print information is shown in the figure below.

IMG20180321112334.jpg
IMG20180321112334.jpg4160×3120 6.66 MB

IMG20180321112334.jpg
IMG20180321112334.jpg2080×1560 1.74 MB

6
7

hi JerryChang,

Do you have the demo of capture application of tx2?

8

hello 2284810331,

unfortunately, we did not have hot-plug support with TX2’s VI driver.
that crash is expected if you un-plug the video source.

we’re under investigation, still don’t have ETA about this feature.
thanks