media: uvcvideo: Implement dual stream quirk to fix loss of usb packets

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[ Upstream commit c2eda35e67 ]

Some cameras, such as the Sonix Technology Co. 292A, exhibit issues when
running two parallel streams, causing USB packets to be dropped when an
H.264 stream posts a keyframe while an MJPEG stream is running
simultaneously. This occasionally causes the driver to erroneously
output two consecutive JPEG images as a single frame.

To fix this, we inspect the buffer, and trigger a new frame when we
find an SOI.

Signed-off-by: Isaac Scott <isaac.scott@ideasonboard.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20241128145144.61475-2-isaac.scott@ideasonboard.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Isaac Scott 2024-11-28 14:51:43 +00:00 • committed by Greg Kroah-Hartman

parent eef0ce8d8d

commit 1b259a5df5

2 changed files with 27 additions and 1 deletions

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27

drivers/media/usb/uvc/uvc_video.c

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1

drivers/media/usb/uvc/uvcvideo.h

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