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media: v4l: ctrls: Add debug messages

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Currently, the v4l2 control code is a bit silent on errors.
Add debug messages on (hopefully) most of the error paths.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia
2019-07-20 07:47:07 -04:00
committed by Mauro Carvalho Chehab
parent d4a6a9537b
commit 173f6eacc8
7 changed files with 127 additions and 39 deletions
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Documentation/media/kapi/v4l2-dev.rst
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@@ -288,6 +288,7 @@ Mask Description
0x08 Log the read and write file operations and the VIDIOC_QBUF and
VIDIOC_DQBUF ioctls.
0x10 Log the poll file operation.
0x20 Log error and messages in the control operations.
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Video device cleanup