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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 /include/uapi
parentaf9bb33aa33d4beb5d0ac505d48530a56856f66c (diff)
downloadblackbird-op-linux-2ccbe779bcdee130ea7f1525670dc9d60318a981.tar.gz
blackbird-op-linux-2ccbe779bcdee130ea7f1525670dc9d60318a981.zip
[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 'include/uapi')
-rw-r--r--include/uapi/linux/videodev2.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 94cbe26e9f00..928799c2e2d9 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1822,6 +1822,7 @@ struct v4l2_event_vsync {
/* Payload for V4L2_EVENT_CTRL */
#define V4L2_EVENT_CTRL_CH_VALUE (1 << 0)
#define V4L2_EVENT_CTRL_CH_FLAGS (1 << 1)
+#define V4L2_EVENT_CTRL_CH_RANGE (1 << 2)
struct v4l2_event_ctrl {
__u32 changes;
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