V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF
vbuf->flags &= ~V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF)
out_vb->flags &= ~V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
dst_buf->is_held = src_buf->flags & V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;