BXT_CDCLK_CD2X_DIV_SEL_MASK
divider = intel_de_read(display, CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK;
#define BXT_CDCLK_CD2X_DIV_SEL_1 REG_FIELD_PREP(BXT_CDCLK_CD2X_DIV_SEL_MASK, 0)
#define BXT_CDCLK_CD2X_DIV_SEL_1_5 REG_FIELD_PREP(BXT_CDCLK_CD2X_DIV_SEL_MASK, 1)
#define BXT_CDCLK_CD2X_DIV_SEL_2 REG_FIELD_PREP(BXT_CDCLK_CD2X_DIV_SEL_MASK, 2)
#define BXT_CDCLK_CD2X_DIV_SEL_4 REG_FIELD_PREP(BXT_CDCLK_CD2X_DIV_SEL_MASK, 3)