v4l2_detect_gtf — detect if the given timings follow the GTF standard
|struct v4l2_fract aspect,|
|struct v4l2_dv_timings * fmt|
the total height of the frame (including blanking) in lines.
the horizontal frequency in Hz.
the height of the vertical sync in lines.
the horizontal and vertical polarities (same as struct v4l2_bt_timings polarities).
if this flag is true, it indicates interlaced format
preferred aspect ratio. GTF has no method of determining the aspect ratio in order to derive the image width from the image height, so it has to be passed explicitly. Usually the native screen aspect ratio is used for this. If it is not filled in correctly, then 16:9 will be assumed.
the resulting timings.