BT848_RISC_VIDEO
#define BT848_INT_RISCS_VIDEO (BT848_RISC_VIDEO << 28)
btv->loop_irq = BT848_RISC_VIDEO;
set->frame_irq = BT848_RISC_VIDEO;
btv->loop_irq &= ~BT848_RISC_VIDEO;
btv->loop_irq |= BT848_RISC_VIDEO;