diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst b/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst index 39e24ad..c91039b 100644 --- a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst +++ b/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst @@ -127,7 +127,9 @@ still cause this situation. to a value large enough to store the payload result and ``ENOSPC`` is returned. - .. note:: For string controls, this ``size`` field should + .. note:: + + For string controls, this ``size`` field should not be confused with the length of the string. This field refers to the size of the memory that contains the string. The actual *length* of the string may well be much smaller. @@ -265,7 +267,9 @@ still cause this situation. control and ``V4L2_CTRL_WHICH_DEF_VAL`` will return the default value of the control. - .. note:: You can only get the default value of the control, + .. note:: + + You can only get the default value of the control, you cannot set or try it. For backwards compatibility you can also use a control class here |