TUSB8043A: TUSB8043A

Xiaobo Ma

Part Number: TUSB8043A

Hi TI Teams:

Our device usb TUSB8043A hub to connect USB camera,

But sometimes, getting a video stream from the usb camera fails.
We analyzed the kernel log, the usb driver reported -71 (protocol error), and finally we located that the xHCI controller reported COMP_USB_TRANSACTION_ERROR.

We have encountered this error before. Your analysis in the case is that there is a problem with the lpm of hub. We disable the hub's lpm at the time, and the problem is no longer repeated.
But now we encounter similar problems again, can you help to analyze whether it is still the same reason?

I uploaded the kernel log and lecroy analyzer log. Here are two failed analyzer logs:

20230601104114_104652_stream unavailable_1_A10305
(started from June-1st, 2023 10:41am JST)
20230601113458_113549_stream unavailable_2_A10305
(started from June-1st, 2023 11:13am JST)

20230601104114_104652_stream unavailable_1_A10305.zip

20230601113458_113549_stream unavailable_2_A10305.zip

kern.zip

Thanks,

Best Regards

over 2 years ago

0 Brian Zhou over 2 years ago

TI__Guru*** 144765 points

Xiaobo:

Is the same product as before? I will review the log.

Best

Brian

0 Xiaobo Ma over 2 years ago in reply to Brian Zhou

Prodigy 70 points

Hi Brian,

Thanks for your review. Yes, it's the same product as before.

Best Regards

0 Brian Zhou over 2 years ago in reply to Xiaobo Ma

TI__Guru*** 144765 points

is this happened with new material?

Best

Brian

0 Xiaobo Ma over 2 years ago in reply to Brian Zhou

Prodigy 70 points

Hi Brian,

No, it has nothing to do with the material, we have this problem with all of our devices, but only with one particular camera, so we haven't seen it before. However, we confirm that this camera is normal, using ubuntu PC to do the same operation, the camera can work normally.

The phenomenon of this problem is very similar to the previous one, so please analyze whether the root cause is the same? Is it also related to u1u2?

Best Regards