CNFG_PANEL
crtc->lcd_config_panel = aty_ld_lcd(CNFG_PANEL, par);
aty_st_lcd(CNFG_PANEL, crtc->lcd_config_panel, par);
crtc->lcd_config_panel = aty_ld_lcd(CNFG_PANEL, par) | 0x4000;