DCU_INT_MASK
regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);