[media] DocBook/media/v4l: il_* fields always 0 for progressive formats
Clarify that the il_vfrontporch, il_vsync and il_vbackporch fields must always be 0 for progressive formats. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -156,19 +156,19 @@ bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_H
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<entry>__u32</entry>
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<entry><structfield>il_vfrontporch</structfield></entry>
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<entry>Vertical front porch in lines for the even field (aka field 2) of
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interlaced field formats.</entry>
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interlaced field formats. Must be 0 for progressive formats.</entry>
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</row>
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<row>
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<entry>__u32</entry>
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<entry><structfield>il_vsync</structfield></entry>
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<entry>Vertical sync length in lines for the even field (aka field 2) of
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interlaced field formats.</entry>
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interlaced field formats. Must be 0 for progressive formats.</entry>
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</row>
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<row>
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<entry>__u32</entry>
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<entry><structfield>il_vbackporch</structfield></entry>
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<entry>Vertical back porch in lines for the even field (aka field 2) of
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interlaced field formats.</entry>
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interlaced field formats. Must be 0 for progressive formats.</entry>
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</row>
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<row>
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<entry>__u32</entry>
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