LCD_WINCTRL2_CKMODE
val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_CKMODE);
val |= ((pdata->colorkey_mode << 24) & LCD_WINCTRL2_CKMODE);
pdata->colorkey_mode = (lcd->window[plane].winctrl2 & LCD_WINCTRL2_CKMODE) >> 24;