W5_COMBINED_BACKBONE_BUS_CTRL
wave5_fio_writel(vpu_dev, W5_COMBINED_BACKBONE_BUS_CTRL, 0x7);
wave5_fio_writel(vpu_dev, W5_COMBINED_BACKBONE_BUS_CTRL, 0x00);
wave5_fio_writel(vpu_dev, W5_COMBINED_BACKBONE_BUS_CTRL, 0x00);