hd44780_ddram_redraw
hd44780_ddram_redraw(&sc->sc_lcd, 0, &io);
hd44780_ddram_redraw(&sc->sc_hlcd, sc->sc_hlcd.sc_curchip, &io);
hd44780_ddram_redraw(sc, en, hd44780_io());
void hd44780_ddram_redraw(struct hd44780_chip *, uint32_t, struct hd44780_io *);