V4L/DVB (5402): Add vsync_field to the union in video_event for VIDEO_EVENT_VSYNC

VIDEO_EVENT_VSYNC needs to tell the application which field it was that
received a VSYNC (odd/even/progressive). The vsync_field was added to the
union in video_event for this purpose.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/dvb/video.h b/include/linux/dvb/video.h
index a96da40c50f5..0c2a1c7c50a6 100644
--- a/include/linux/dvb/video.h
+++ b/include/linux/dvb/video.h
@@ -120,6 +120,13 @@ struct video_command {
         };
 };
 
+/* FIELD_UNKNOWN can be used if the hardware does not know whether
+   the Vsync is for an odd, even or progressive (i.e. non-interlaced)
+   field. */
+#define VIDEO_VSYNC_FIELD_UNKNOWN       (0)
+#define VIDEO_VSYNC_FIELD_ODD           (1)
+#define VIDEO_VSYNC_FIELD_EVEN          (2)
+#define VIDEO_VSYNC_FIELD_PROGRESSIVE   (3)
 
 struct video_event {
         int32_t type;
@@ -131,6 +138,7 @@ struct video_event {
         union {
                 video_size_t size;
                 unsigned int frame_rate;        /* in frames per 1000sec */
+                unsigned char vsync_field;      /* unknown/odd/even/progressive */
         } u;
 };