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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2010-03-07 15:04:59 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-03-22 04:53:12 -0300 |
| commit | 503c3d829eaf48837dd5bff5d97ad66369bb955a (patch) | |
| tree | 9c14ed9561c5ffca07909e53d5ae0e52cdf5f99e /Documentation/eisa.txt | |
| parent | a5ccc48a7c48610e7f92fa599406738d69195d51 (diff) | |
| download | linux-stable-503c3d829eaf48837dd5bff5d97ad66369bb955a.tar.gz linux-stable-503c3d829eaf48837dd5bff5d97ad66369bb955a.tar.bz2 linux-stable-503c3d829eaf48837dd5bff5d97ad66369bb955a.zip | |
[media] media: Entity use count
Due to the wide differences between drivers regarding power management
needs, the media controller does not implement power management.
However, the media_entity structure includes a use_count field that
media drivers can use to track the number of users of every entity for
power management needs.
The use_count field is owned by media drivers and must not be touched by
entity drivers. Access to the field must be protected by the media
device graph_mutex lock.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/eisa.txt')
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