[Bug 210767] New: uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

[Bug 210767] New: uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210767

            Bug ID: 210767
           Summary: uvcvideo: Webcam (1f3a:100e) stopped working after
                    8a652a17e3c005dcdae31b6c8fdf14382a29cbbe
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.10.1-2.g8f3d468
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: doerges@pre-sense.de
                CC: tiwai@suse.de
        Regression: Yes

The device in question is

  Renkforce RF AC4K 300 Action Cam 4K

https://www.conrad.de/de/p/action-cam-renkforce-rf-ac-4k-webcam-4k-wlan-wasserfest-staubgeschuetzt-1577043.html


When connected via USB to a PC, it offers two modes:
 - mass storage
 - camera


When set to webcam mode it identifies as:
  [34367.545510] uvcvideo: Found UVC 1.00 device Android (1f3a:100e)


I tested against 5.10.1-2.g8f3d468.


With 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe
(https://raw.githubusercontent.com/SUSE/kernel-source/openSUSE-15.2/patches.suse/media-uvcvideo-Ensure-all-probed-info-is-returned-to.patch)
the device stopped working in camera mode, i.e. no more video capture.


When reversing the above patch, the device is working as expected.


Downstream bug report is at
https://bugzilla.opensuse.org/show_bug.cgi?id=1180117

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210767

--- Comment #1 from Laurent Pinchart (laurent.pinchart+bugzilla-kernel@ideasonboard.com) ---
Could you please provide the output of

lsusb -v -d 1f3a:100e

(if possible running as root) ?

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210767

--- Comment #2 from Till Dörges (doerges@pre-sense.de) ---
Created attachment 294237
  --> https://bugzilla.kernel.org/attachment.cgi?id=294237&action=edit
Output from lsusb as root

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

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--- Comment #3 from Till Dörges (doerges@pre-sense.de) ---
The device also seems to have issues with USB suspend
(https://sourceforge.net/p/linux-uvc/mailman/message/37178728/)

Is this in any way related?

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

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https://bugzilla.kernel.org/show_bug.cgi?id=210767

--- Comment #4 from Laurent Pinchart (laurent.pinchart+bugzilla-kernel@ideasonboard.com) ---
Thank you for the lsusb output.

The problem is caused by a bug in the device firmware, so we'll need to work
around it. I'll propose a patch.

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

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--- Comment #5 from Laurent Pinchart (laurent.pinchart+bugzilla-kernel@ideasonboard.com) ---
Created attachment 294241
  --> https://bugzilla.kernel.org/attachment.cgi?id=294241&action=edit
Tentative patch

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

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--- Comment #6 from Laurent Pinchart (laurent.pinchart+bugzilla-kernel@ideasonboard.com) ---
Assuming the patch fixes the issue, I'll submit it to the linux-media mailing
list. Till, are you OK to have your name included in the commit messages as the
reporter ?

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

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--- Comment #7 from Till Dörges (doerges@pre-sense.de) ---
(In reply to Laurent Pinchart from comment #6)

> Assuming the patch fixes the issue, I'll submit it to the linux-media
> mailing list.

Will try to give the patch a shot asap.


> Till, are you OK to have your name included in the commit
> messages as the reporter ?

Yes, including my name is okay.

Thanks for the quick turnaround!

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[Bug 210767] uvcvideo: Webcam (1f3a:100e) stopped working after 8a652a17e3c005dcdae31b6c8fdf14382a29cbbe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210767

--- Comment #8 from Till Dörges (doerges@pre-sense.de) ---
Tests were against 5.10.1-2.g8f3d468.

I applied the patch from comment 5
(0001-media-uvcvideo-Accept-invalid-bFormatIndex-and-bFram.patch).

The device is working as expected with that patch.

Thanks!

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