V4L2_FBUF_FLAG_GLOBAL_ALPHA
fb->flags |= V4L2_FBUF_FLAG_GLOBAL_ALPHA;
itv->osd_global_alpha_state = (fb->flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) != 0;
vout->fbuf.flags |= V4L2_FBUF_FLAG_GLOBAL_ALPHA;
if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) &&
const unsigned alpha_flags = V4L2_FBUF_FLAG_GLOBAL_ALPHA |
case V4L2_FBUF_FLAG_GLOBAL_ALPHA: