V4L2_FIELD_INTERLACED
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
(field) == V4L2_FIELD_INTERLACED ||\
(field) == V4L2_FIELD_INTERLACED ||\
((field) == V4L2_FIELD_INTERLACED ||\
((field) == V4L2_FIELD_INTERLACED ||\