[media] DocBook media: document the new 'which' field

The subdev enum ioctls now have a new 'which' field. Document this.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-interval.xml

@@ -67,9 +67,9 @@
 
     <para>To enumerate frame intervals applications initialize the
     <structfield>index</structfield>, <structfield>pad</structfield>,
-    <structfield>code</structfield>, <structfield>width</structfield> and
-    <structfield>height</structfield> fields of
-    &v4l2-subdev-frame-interval-enum; and call the
+    <structfield>which</structfield>, <structfield>code</structfield>,
+    <structfield>width</structfield> and <structfield>height</structfield>
+    fields of &v4l2-subdev-frame-interval-enum; and call the
     <constant>VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL</constant> ioctl with a pointer
     to this structure. Drivers fill the rest of the structure or return
     an &EINVAL; if one of the input fields is invalid. All frame intervals are
@@ -123,7 +123,12 @@
 	  </row>
 	  <row>
 	    <entry>__u32</entry>
-	    <entry><structfield>reserved</structfield>[9]</entry>
+	    <entry><structfield>which</structfield></entry>
+	    <entry>Frame intervals to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+	  </row>
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>reserved</structfield>[8]</entry>
 	    <entry>Reserved for future extensions. Applications and drivers must
 	    set the array to zero.</entry>
 	  </row>

Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml

@@ -61,9 +61,9 @@
     ioctl.</para>
 
     <para>To enumerate frame sizes applications initialize the
-    <structfield>pad</structfield>, <structfield>code</structfield> and
-    <structfield>index</structfield> fields of the
-    &v4l2-subdev-mbus-code-enum; and call the
+    <structfield>pad</structfield>, <structfield>which</structfield> ,
+    <structfield>code</structfield> and <structfield>index</structfield>
+    fields of the &v4l2-subdev-mbus-code-enum; and call the
     <constant>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</constant> ioctl with a pointer to
     the structure. Drivers fill the minimum and maximum frame sizes or return
     an &EINVAL; if one of the input parameters is invalid.</para>
@@ -127,7 +127,12 @@
 	  </row>
 	  <row>
 	    <entry>__u32</entry>
-	    <entry><structfield>reserved</structfield>[9]</entry>
+	    <entry><structfield>which</structfield></entry>
+	    <entry>Frame sizes to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+	  </row>
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>reserved</structfield>[8]</entry>
 	    <entry>Reserved for future extensions. Applications and drivers must
 	    set the array to zero.</entry>
 	  </row>

Documentation/DocBook/media/v4l/vidioc-subdev-enum-mbus-code.xml

@@ -56,8 +56,8 @@
     </note>
 
     <para>To enumerate media bus formats available at a given sub-device pad
-    applications initialize the <structfield>pad</structfield> and
-    <structfield>index</structfield> fields of &v4l2-subdev-mbus-code-enum; and
+    applications initialize the <structfield>pad</structfield>, <structfield>which</structfield>
+    and <structfield>index</structfield> fields of &v4l2-subdev-mbus-code-enum; and
     call the <constant>VIDIOC_SUBDEV_ENUM_MBUS_CODE</constant> ioctl with a
     pointer to this structure. Drivers fill the rest of the structure or return
     an &EINVAL; if either the <structfield>pad</structfield> or
@@ -93,7 +93,12 @@
 	  </row>
 	  <row>
 	    <entry>__u32</entry>
-	    <entry><structfield>reserved</structfield>[9]</entry>
+	    <entry><structfield>which</structfield></entry>
+	    <entry>Media bus format codes to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+	  </row>
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>reserved</structfield>[8]</entry>
 	    <entry>Reserved for future extensions. Applications and drivers must
 	    set the array to zero.</entry>
 	  </row>