From: evan@gnarbox.com
To: linux-usb@vger.kernel.org
Subject: DJI CINESSD USB Adapter Failures
Date: Wed, 20 Nov 2019 11:17:16 -0800 [thread overview]
Message-ID: <20191120191716.DVZ3qorXy%evan@gnarbox.com> (raw)
We're trying to connect a DJI CINESSD USB adapter to our custom
hardware running kernel 4.9. It enumerates, communciation fails, then
it disconnects. This cycle seems to continue indefinitely. I've supplied
links to the dmesg output[0] and the USB protocol analyzer capture[1] of
this situtation. Please see the Data Center tool[2] to view the capture.
The device also does not enumerate properly on a desktop and laptop we
have running 4.15. There is a patch[3] that disables LPM for this device.
After applying that patch the desktop and laptop work. We already have
LPM disabled wholesale on our board so this patch did not help.
Does anything in the dmesg or capture jump out? What information can
I gather or next steps would you recommend?
-Evan
[0] https://drive.google.com/open?id=1eDtuSFfCmC7uX0pEdw8L0UPWMPLXzW4B
[1] https://drive.google.com/open?id=1ew160mTiC5joeJPo0wQvagTr8o1tL3kt
[2] https://www.totalphase.com/products/data-center/
[3] https://lore.kernel.org/patchwork/patch/990417/
next reply other threads:[~2019-11-20 19:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-20 19:17 evan [this message]
2019-11-20 21:31 ` DJI CINESSD USB Adapter Failures Alan Stern
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