The downstrem device of my project is very sensitive to the field order when the input source is interlaced video from SDP core of ADV7842.
But the field order of ADV7842 output is ranging within the same video input. If the field order does not match to the downstrem device,the output video of downstream device will be "interlacing artifact".
If the field order can be known form ADV7842, he field order of downstream device can be set to match the ADV7842 in running and the output video will not be "interlacing artifact" unmanually!
How to get the field order of ADV7842 ?