VDC_DRING_BOUND
if ((vdc->initialized & VDC_DRING_BOUND) == 0) {
vdc->initialized |= VDC_DRING_BOUND;
if (vdc->initialized & VDC_DRING_BOUND) {
vdc->initialized &= ~VDC_DRING_BOUND;
#define VDC_DRING (VDC_DRING_INIT | VDC_DRING_BOUND | \