DP_PSR_EN_CFG
DP_PSR_EN_CFG,
ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en);
ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0);
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, val);
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, val);
drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &cfg, 1);