Dell acpi_video patch

[Juergen Lock]

On Fri, Oct 19, 2012 at 11:14:10AM -0400, John Baldwin wrote:
> On Thursday, October 18, 2012 3:57:23 pm Juergen Lock wrote:
> > On Thu, Oct 18, 2012 at 08:59:14AM -0400, John Baldwin wrote:
> > > On Friday, October 12, 2012 12:33:49 pm Juergen Lock wrote:
> > > > On Fri, Oct 12, 2012 at 10:06:17AM -0400, John Baldwin wrote:
> > > > > On Friday, October 05, 2012 5:53:16 pm Juergen Lock wrote:
> > > > > > Hi!
> > > > > > 
> > > > > >  I finally took a closer look why acpi_video found nothing on my
> > > > > > Dell laptop (Precision M4500), and came up with this patch:
> > > > > > 
> > > > > > --- sys/dev/acpica/acpi_video.c.orig
> > > > > > +++ sys/dev/acpica/acpi_video.c
> > > > > > @@ -906,7 +906,7 @@ vid_enum_outputs_subr(ACPI_HANDLE handle
> > > > > >  
> > > > > >  	for (i = 0; i < argset->dod_pkg->Package.Count; i++) {
> > > > > >  		if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 &&
> > > > > > -		    (val & DOD_DEVID_MASK_FULL) == adr) {
> > > > > > +		    (val & (DOD_DEVID_MASK_FULL | 0x80000000)) == adr) {
> > > > > >  			argset->callback(handle, val, argset->context);
> > > > > >  			argset->count++;
> > > > > >  		}
> > > > > > 
> > > > > > which gives me:
> > > > > 
> > > > > I think this is correct, but in we need to do more to properly handle that 
> > > > > flag (DOD_DEVID_SCHEME_STD).  Specifically, we shouldn't trust any bits in the 
> > > > > device ID unless that bit is set (except for the special case of 
> > > > > DOD_DEVID_LCD) as per my reading of the _DOD description in the ACPI 3.0b 
> > > > > spec.  I think this larger patch will do that while also fixing your case:
> > > >
> > > > Thank you, yes that still works for me the same as my original patch:
> > > 
> > > Can you please test this updated patch as well: 
> 
> Sorry, one more request.  I think I want to commit just your fix separately,
> but I have a slightly different version of it.  Can you just double check
> this version:
> 
> Index: acpi_video.c
> ===================================================================
> --- acpi_video.c	(revision 241688)
> +++ acpi_video.c	(working copy)
> @@ -906,7 +906,8 @@ vid_enum_outputs_subr(ACPI_HANDLE handle, UINT32 l
>  
>  	for (i = 0; i < argset->dod_pkg->Package.Count; i++) {
>  		if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 &&
> -		    (val & DOD_DEVID_MASK_FULL) == adr) {
> +		    (val & DOD_DEVID_MASK_FULL) ==
> +		    (adr & DOD_DEVID_MASK_FULL)) {
>  			argset->callback(handle, val, argset->context);
>  			argset->count++;
>  		}
> 
> -- 
> John Baldwin

Yup that still works the same:

% sysctl hw.acpi.video
hw.acpi.video.crt0.active: 0
hw.acpi.video.lcd0.active: 0
hw.acpi.video.lcd0.brightness: 100
hw.acpi.video.lcd0.fullpower: 100
hw.acpi.video.lcd0.economy: 46
hw.acpi.video.lcd0.levels: 100 46 0 6 13 20 26 33 40 46 53 60 66 73 80 86 93 100
hw.acpi.video.ext0.active: 0
hw.acpi.video.ext1.active: 0
hw.acpi.video.ext2.active: 0
hw.acpi.video.ext3.active: 0
% 

 Thanx, :)
	Juergen