EXT_VERT_STRETCH
crtc->ext_vert_stretch = aty_ld_lcd(EXT_VERT_STRETCH, par) &
if (i == EXT_VERT_STRETCH)
crtc->ext_vert_stretch = aty_ld_lcd(EXT_VERT_STRETCH, par);
aty_st_lcd(EXT_VERT_STRETCH, crtc->ext_vert_stretch, par);