diff options
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml | 8 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml | 10 |
2 files changed, 13 insertions, 5 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml index 12b1d0503e2..ee2820d6ca6 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml @@ -64,7 +64,9 @@ return an &EINVAL;. When the <structfield>value</structfield> is out of bounds drivers can choose to take the closest valid value or return an &ERANGE;, whatever seems more appropriate. However, <constant>VIDIOC_S_CTRL</constant> is a write-only ioctl, it does not -return the actual new value.</para> +return the actual new value. If the <structfield>value</structfield> +is inappropriate for the control (e.g. if it refers to an unsupported +menu index of a menu control), then &EINVAL; is returned as well.</para> <para>These ioctls work only with user controls. For other control classes the &VIDIOC-G-EXT-CTRLS;, &VIDIOC-S-EXT-CTRLS; or @@ -99,7 +101,9 @@ application.</entry> <term><errorcode>EINVAL</errorcode></term> <listitem> <para>The &v4l2-control; <structfield>id</structfield> is -invalid.</para> +invalid or the <structfield>value</structfield> is inappropriate for +the given control (i.e. if a menu item is selected that is not supported +by the driver according to &VIDIOC-QUERYMENU;).</para> </listitem> </varlistentry> <varlistentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml index 42ffbff6d37..4e16112df99 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml @@ -106,7 +106,9 @@ value or if an error is returned.</para> &EINVAL;. When the value is out of bounds drivers can choose to take the closest valid value or return an &ERANGE;, whatever seems more appropriate. In the first case the new value is set in -&v4l2-ext-control;.</para> +&v4l2-ext-control;. If the new control value is inappropriate (e.g. the +given menu index is not supported by the menu control), then this will +also result in an &EINVAL; error.</para> <para>The driver will only set/get these controls if all control values are correct. This prevents the situation where only some of the @@ -331,8 +333,10 @@ These controls are described in <xref <term><errorcode>EINVAL</errorcode></term> <listitem> <para>The &v4l2-ext-control; <structfield>id</structfield> -is invalid or the &v4l2-ext-controls; -<structfield>ctrl_class</structfield> is invalid. This error code is +is invalid, the &v4l2-ext-controls; +<structfield>ctrl_class</structfield> is invalid, or the &v4l2-ext-control; +<structfield>value</structfield> was inappropriate (e.g. the given menu +index is not supported by the driver). This error code is also returned by the <constant>VIDIOC_S_EXT_CTRLS</constant> and <constant>VIDIOC_TRY_EXT_CTRLS</constant> ioctls if two or more control values are in conflict.</para> |