From: Hans Verkuil <hans.verk...@cisco.com>

Clarify that the il_vfrontporch, il_vsync and il_vbackporch fields must
always be 0 for progressive formats.

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
 Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml 
b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml
index 7236970..c433657 100644
--- a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml
@@ -156,19 +156,19 @@ bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync 
polarity and bit 1 (V4L2_DV_H
            <entry>__u32</entry>
            <entry><structfield>il_vfrontporch</structfield></entry>
            <entry>Vertical front porch in lines for the even field (aka field 
2) of
-           interlaced field formats.</entry>
+           interlaced field formats. Must be 0 for progressive formats.</entry>
          </row>
          <row>
            <entry>__u32</entry>
            <entry><structfield>il_vsync</structfield></entry>
            <entry>Vertical sync length in lines for the even field (aka field 
2) of
-           interlaced field formats.</entry>
+           interlaced field formats. Must be 0 for progressive formats.</entry>
          </row>
          <row>
            <entry>__u32</entry>
            <entry><structfield>il_vbackporch</structfield></entry>
            <entry>Vertical back porch in lines for the even field (aka field 
2) of
-           interlaced field formats.</entry>
+           interlaced field formats. Must be 0 for progressive formats.</entry>
          </row>
          <row>
            <entry>__u32</entry>
-- 
1.8.3.2

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