LCD_WINCTRL0_AEN
val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_AEN);
val |= ((pdata->alpha_mode << 1) & LCD_WINCTRL0_AEN);
pdata->alpha_mode = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_AEN) >> 1;
winctrl0 &= (LCD_WINCTRL0_A | LCD_WINCTRL0_AEN);