Z50 Brightness & Contrast

The IOCTLs exist in  sys/arch/hpcmips/dev/ite8181.c, but do
they work?

djb

int
ite8181_ioctl(v, cmd, data, flag, l)
...
case WSDISPLAYIO_PARAM_BRIGHTNESS:
			VPRINTF(("ite8181_ioctl:
SET:BRIGHTNESS\n"));
			ite8181_init_brightness(sc, 0);
			if (dispparam->curval < 0 ||
			    sc->sc_max_brightness < dispparam->curval)
				return (EINVAL);
			if (sc->sc_max_brightness > 0) {
				int org = sc->sc_brightness;
				ite8181_set_brightness(sc, dispparam->curval);
				VPRINTF(("ite8181_ioctl: SET:BRIGHTNESS"
				    " org=%d, current=%d\n", org,
				    sc->sc_brightness));
				return 0;

On Monday 20 March 2006 06:43 am, djb_netbsdcharter.net wrote:
> The IOCTLs exist in  sys/arch/hpcmips/dev/ite8181.c,
but do they work?
>
> djb
>
> int
> ite8181_ioctl(v, cmd, data, flag, l)
> ...
> case WSDISPLAYIO_PARAM_BRIGHTNESS:
>    VPRINTF(("ite8181_ioctl:
SET:BRIGHTNESS\n"));
>    ite8181_init_brightness(sc, 0);
>    if (dispparam->curval < 0 ||
>        sc->sc_max_brightness <
dispparam->curval)
>     return (EINVAL);
>    if (sc->sc_max_brightness > 0) {
>     int org = sc->sc_brightness;
>     ite8181_set_brightness(sc, dispparam->curval);
>     VPRINTF(("ite8181_ioctl:
SET:BRIGHTNESS"
>         " org=%d, current=%d\n", org,
>         sc->sc_brightness));
>     return 0;

Hi there,
               Looking at the code in ite8181.c (this ia
R3.0 code) you can 
see that the "brightness" calls
(ite8181_init_brightness et al) end up 
calling:-

   config_hook_call(CONFIG_HOOK_GET,
CONFIG_HOOK_BRIGHTNESS,&val)

and the like. 

Scanning the source from /usr/src/sys on down, there is no
call that registers 
this config hook for hpcmips machines except for the Sharp
Telios machines.

If we can find out what the hardware mechanism is which
WINCE uses to tweek 
the brightness, we can easily write the necessary hook and
then we are in 
business.   Similar things apply to the contrast.

So now we need a kind soul who will share the knowledge
..... 

cheers
pete

-- 
pete hilton
sarumanruvolo-hilton.org
  
IsaBella --- ICE Explorer #1070