DW_DP_HPD_STATUS
regmap_read_poll_timeout(dp->regmap, DW_DP_HPD_STATUS, val,
regmap_write(dp->regmap, DW_DP_HPD_STATUS, HPD_HOT_PLUG);
regmap_read(dp->regmap, DW_DP_HPD_STATUS, &value);
regmap_write(dp->regmap, DW_DP_HPD_STATUS, HPD_IRQ);
regmap_write(dp->regmap, DW_DP_HPD_STATUS, HPD_HOT_PLUG);
regmap_write(dp->regmap, DW_DP_HPD_STATUS, HPD_HOT_UNPLUG);
regmap_read(dp->regmap, DW_DP_HPD_STATUS, &value);