call_bufop
ret = call_bufop(vb->vb2_queue, fill_vb2_buffer,
ret = call_bufop(vb->vb2_queue, fill_vb2_buffer,
ret = call_bufop(vb->vb2_queue, fill_vb2_buffer,
ret = call_bufop(q, verify_planes_array, *vb, pb);