From: Vaibhav Hiremath <hvaib...@ti.com>

Signed-off-by: Vaibhav Hiremath <hvaib...@ti.com>
---
 linux/Documentation/DocBook/v4l/videodev2.h.xml   |    2 ++
 linux/Documentation/DocBook/v4l/vidioc-g-fbuf.xml |   17 +++++++++++++++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/linux/Documentation/DocBook/v4l/videodev2.h.xml 
b/linux/Documentation/DocBook/v4l/videodev2.h.xml
index 9700206..eef7ba4 100644
--- a/linux/Documentation/DocBook/v4l/videodev2.h.xml
+++ b/linux/Documentation/DocBook/v4l/videodev2.h.xml
@@ -565,6 +565,7 @@ struct <link 
linkend="v4l2-framebuffer">v4l2_framebuffer</link> {
 #define V4L2_FBUF_CAP_LOCAL_ALPHA       0x0010
 #define V4L2_FBUF_CAP_GLOBAL_ALPHA      0x0020
 #define V4L2_FBUF_CAP_LOCAL_INV_ALPHA   0x0040
+#define V4L2_FBUF_CAP_SRC_CHROMAKEY     0x0080
 /*  Flags for the 'flags' field. */
 #define V4L2_FBUF_FLAG_PRIMARY          0x0001
 #define V4L2_FBUF_FLAG_OVERLAY          0x0002
@@ -572,6 +573,7 @@ struct <link 
linkend="v4l2-framebuffer">v4l2_framebuffer</link> {
 #define V4L2_FBUF_FLAG_LOCAL_ALPHA      0x0008
 #define V4L2_FBUF_FLAG_GLOBAL_ALPHA     0x0010
 #define V4L2_FBUF_FLAG_LOCAL_INV_ALPHA  0x0020
+#define V4L2_FBUF_FLAG_SRC_CHROMAKEY    0x0040
 
 struct <link linkend="v4l2-clip">v4l2_clip</link> {
         struct <link linkend="v4l2-rect">v4l2_rect</link>        c;
diff --git a/linux/Documentation/DocBook/v4l/vidioc-g-fbuf.xml 
b/linux/Documentation/DocBook/v4l/vidioc-g-fbuf.xml
index f701706..e7dda48 100644
--- a/linux/Documentation/DocBook/v4l/vidioc-g-fbuf.xml
+++ b/linux/Documentation/DocBook/v4l/vidioc-g-fbuf.xml
@@ -336,6 +336,13 @@ alpha value. Alpha blending makes no sense for destructive 
overlays.</entry>
 inverted alpha channel of the framebuffer or VGA signal. Alpha
 blending makes no sense for destructive overlays.</entry>
          </row>
+         <row>
+           <entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry>
+           <entry>0x0080</entry>
+           <entry>The device supports Source Chroma-keying. Framebuffer pixels
+with the chroma-key colors are replaced by video pixels, which is exactly 
opposite of
+<constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
+         </row>
        </tbody>
       </tgroup>
     </table>
@@ -411,6 +418,16 @@ images, but with an inverted alpha value. The blend 
function is:
 output = framebuffer pixel * (1 - alpha) + video pixel * alpha. The
 actual alpha depth depends on the framebuffer pixel format.</entry>
          </row>
+         <row>
+           <entry><constant>V4L2_FBUF_FLAG_SRC_CHROMAKEY</constant></entry>
+           <entry>0x0040</entry>
+           <entry>Use source chroma-keying. The source chroma-key color is
+determined by the <structfield>chromakey</structfield> field of
+&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+linkend="overlay" /> and <xref linkend="osd" />.
+Both chroma-keying are mutual exclusive to each other, so same
+<structfield>chromakey</structfield> field of &v4l2-window; is being 
used.</entry>
+         </row>
        </tbody>
       </tgroup>
     </table>
-- 
1.6.2.4

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