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authorSylwester Nawrocki <sylvester.nawrocki@gmail.com>2013-01-19 15:51:55 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-02-05 15:04:06 -0200
commit2ccbe779bcdee130ea7f1525670dc9d60318a981 (patch)
treef667acca6ab42a0565b062616b3a6f176508e874 /Documentation/DocBook/media/v4l/v4l2.xml
parentaf9bb33aa33d4beb5d0ac505d48530a56856f66c (diff)
downloadop-kernel-dev-2ccbe779bcdee130ea7f1525670dc9d60318a981.zip
op-kernel-dev-2ccbe779bcdee130ea7f1525670dc9d60318a981.tar.gz
[media] v4l2-ctrl: Add helper function for the controls range update
This patch adds a helper function that allows to modify range, i.e. minimum, maximum, step and default value of a v4l2 control, after the control has been created and initialized. This is helpful in situations when range of a control depends on user configurable parameters, e.g. camera sensor absolute exposure time depending on an output image resolution and frame rate. v4l2_ctrl_modify_range() function allows to modify range of an INTEGER, BOOL, MENU, INTEGER_MENU and BITMASK type controls. Based on a patch from Hans Verkuil http://patchwork.linuxtv.org/patch/8654. Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/v4l2.xml')
-rw-r--r--Documentation/DocBook/media/v4l/v4l2.xml4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml
index 8fe2942..c3851a2 100644
--- a/Documentation/DocBook/media/v4l/v4l2.xml
+++ b/Documentation/DocBook/media/v4l/v4l2.xml
@@ -142,10 +142,12 @@ applications. -->
<revision>
<revnumber>3.9</revnumber>
<date>2012-12-03</date>
- <authorinitials>sa</authorinitials>
+ <authorinitials>sa, sn</authorinitials>
<revremark>Added timestamp types to
<structname>v4l2_buffer</structname>, see <xref
linkend="buffer-flags" />.
+ Added <constant>V4L2_EVENT_CTRL_CH_RANGE</constant> control
+ event changes flag, see <xref linkend="changes-flags"/>.
</revremark>
</revision>
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