cdn_dp_reg_write_bit 777 drivers/gpu/drm/rockchip/cdn-dp-reg.c ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 2, 1, 0); cdn_dp_reg_write_bit 822 drivers/gpu/drm/rockchip/cdn-dp-reg.c ret = cdn_dp_reg_write_bit(dp, DP_VB_ID, 4, 1, enable);