HDSPM_SyncRef2
case HDSPM_SyncRef2: return 4; /* AES 4 */
case HDSPM_SyncRef2+HDSPM_SyncRef0: return 5; /* AES 5 */
case HDSPM_SyncRef2+HDSPM_SyncRef1: return 6; /* AES 6 */
case HDSPM_SyncRef2+HDSPM_SyncRef1+HDSPM_SyncRef0:
hdspm->control_register |= HDSPM_SyncRef2;
HDSPM_SyncRef2+HDSPM_SyncRef0;
HDSPM_SyncRef2+HDSPM_SyncRef1;
HDSPM_SyncRef2+HDSPM_SyncRef1+HDSPM_SyncRef0;
HDSPM_SyncRef2|HDSPM_SyncRef3)