VPU_40XX_CPU_SS_DOORBELL_0
u32 reg_stride = VPU_40XX_CPU_SS_DOORBELL_1 - VPU_40XX_CPU_SS_DOORBELL_0;
u32 val = REG_FLD(VPU_40XX_CPU_SS_DOORBELL_0, SET);
REGV_WR32I(VPU_40XX_CPU_SS_DOORBELL_0, reg_stride, db_id, val);