diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/standard.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/standard.rst | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/media/uapi/v4l/standard.rst b/Documentation/media/uapi/v4l/standard.rst index 529891cf3af2..9c390c2a128a 100644 --- a/Documentation/media/uapi/v4l/standard.rst +++ b/Documentation/media/uapi/v4l/standard.rst @@ -39,11 +39,12 @@ To query and select the standard used by the current video input or output applications call the :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` ioctl, respectively. The *received* standard can be sensed with the -:ref:`VIDIOC_QUERYSTD` ioctl. Note that the -parameter of all these ioctls is a pointer to a -:ref:`v4l2_std_id <v4l2-std-id>` type (a standard set), *not* an -index into the standard enumeration. Drivers must implement all video -standard ioctls when the device has one or more video inputs or outputs. +:ref:`VIDIOC_QUERYSTD` ioctl. + +..note:: The parameter of all these ioctls is a pointer to a + :ref:`v4l2_std_id <v4l2-std-id>` type (a standard set), *not* an + index into the standard enumeration. Drivers must implement all video + standard ioctls when the device has one or more video inputs or outputs. Special rules apply to devices such as USB cameras where the notion of video standards makes little sense. More generally for any capture or |