dv: flash when start playing dv [1/1]

dv: flash when start playing dv [1/1]

PD#SWPL-14836

Problem:
1) video enable flag is not update correctly
2) source format not update correctly,
which cause wrong dv control path reset
3) when start play video off and repeat frame,
triggers wrong fake sdr frame

Solution:
1) change video enable flag to use both
video_global_output and video_enabled
2) use latest src format insdead of using cur format
3) add repeat frame and video on to off flag to
prevent wrong fake sdr frame

Verify:
Verified on AC213

Change-Id: Ia8ee7bea0b8bcb33e18275611287e0b563caf978
Signed-off-by: robin zhu <robin.zhu@amlogic.com>