Kconfig defaults per chipset, or mainboard?

[Peter Stuge]

In src/Kconfig there is this:

config FALLBACK_VGA_BIOS_ID
        string "VGA BIOS ID"
        depends on VGA_BIOS
        default "1106,3230"
        help
          The ID that would associate your VGA BIOS to your video card.
          (PCI VendorID, PCI Device ID)

How does a component (nb, sb, sio) or mainboard provide an override
for this default?

//Peter

[Peter Stuge]

Peter Stuge wrote:
> How does a component (nb, sb, sio) or mainboard provide an override
> for this default?

Another thing I ran into. Can we deal with something like
CONFIG_VIDEO_MB in a smarter way than letting it be int? Different
boards will have different permitted options.

One thought is to have a single list with all possible options and
have each option depend on the list of components/boards that applies
- but that will get REALLY verbose, no?

//Peter

[Patrick Georgi]

Am Donnerstag, den 17.09.2009, 19:01 +0200 schrieb Peter Stuge:
> In src/Kconfig there is this:
>
> config FALLBACK_VGA_BIOS_ID
>         string "VGA BIOS ID"
>         depends on VGA_BIOS
>         default "1106,3230"
>         help
>           The ID that would associate your VGA BIOS to your video card.
>           (PCI VendorID, PCI Device ID)
>
> How does a component (nb, sb, sio) or mainboard provide an override
> for this default?

config FALLBACK_VGA_BIOS_ID
    string
    default "1234,5678"
    depends on NB_OR_SB_OR_SIO_OR_BOARD_ID

should work

[Peter Stuge]

Patrick Georgi wrote:
> > In src/Kconfig there is this:
> >
> > config FALLBACK_VGA_BIOS_ID
> >         string "VGA BIOS ID"
> >         depends on VGA_BIOS
> >         default "1106,3230"
> >
> > How does a component (nb, sb, sio) or mainboard provide an override
> > for this default?
>
> config FALLBACK_VGA_BIOS_ID
>    string
>    default "1234,5678"
>    depends on NB_OR_SB_OR_SIO_OR_BOARD_ID
>
> should work

Cool. How does the precedence work?

//Peter

[Patrick Georgi]

Am Donnerstag, den 17.09.2009, 19:19 +0200 schrieb Peter Stuge:
> Patrick Georgi wrote:
> > > In src/Kconfig there is this:
> > >
> > > config FALLBACK_VGA_BIOS_ID
> > >         string "VGA BIOS ID"
> > >         depends on VGA_BIOS
> > >         default "1106,3230"
> > >
> > > How does a component (nb, sb, sio) or mainboard provide an override
> > > for this default?
> >
> > config FALLBACK_VGA_BIOS_ID
> >    string
> >    default "1234,5678"
> >    depends on NB_OR_SB_OR_SIO_OR_BOARD_ID
> >
> > should work
>
> Cool. How does the precedence work?

No idea. Either it's "last one wins" in reading order, or - that's what
I hope, it's "most specific wins".

And for that, there should always be only the global default and one
that applies for each configuration (eg. by making sure that these
values are defined by the same class of devices, ie. SBs, NBs, SIOs or
boards)

Patrick