The Dino-Lite cameras are equipped with LED lights that can be switched
on and off by setting a proprietary control. For this control, the
camera reports a length of 1 byte, but actually the value set by the
original Windows driver is 3 byte long. This makes it impossible to
toggle the camera lights from uvcvideo, as the length from GET_LEN is
trusted as being the right one.
This patch makes GET_LEN indicate a length of 3 instead of 1 for this
specific device and control cs/unit.
This patch is a follow-up of a previous patch [1] sent in June, that
went unnoticed but addresses the same issue. It uses a table of local
fixups instead of a module quirk. If you prefer this approach, please
tell me, so I can rework it a bit and submit it in place of this one.
[1] https://patchwork.kernel.org/patch/9764937/
Alexandre Macabies (1):
media: uvcvideo: Add quirk to support light switch on Dino-Lite
cameras
drivers/media/usb/uvc/uvc_driver.c | 9 +++++++++
drivers/media/usb/uvc/uvc_video.c | 10 ++++++++++
drivers/media/usb/uvc/uvcvideo.h | 1 +
3 files changed, 20 insertions(+)
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2.15.1
