[alsa-devel] [PATCH] sound/isa: kill pnp_resource_change.
tiwai at suse.de
Fri Nov 30 17:27:01 CET 2007
At Fri, 30 Nov 2007 18:07:27 +0100,
Rene Herman wrote:
> On 30-11-07 10:07, Takashi Iwai wrote:
> > At Fri, 30 Nov 2007 01:49:00 +0100,
> > Rene Herman wrote:
> >> Actually, the ALSA drivers with PnPBIOS support (snd-cs4232, snd-es18xx and
> >> snd-opl3sa2) do not in fact loose any parameters and the few known trouble
> >> spots there are using
> >> modprobe snd-foo isapnp=0 port=...
> >> as their workaround, bypassing all of PnP, and this still works completely
> >> the same as before.
> >> I do not expect any trouble. A few users might have _mistakingly_ added
> >> parameters to an ISAPnP only (as in, not also PnPBIOS) driver due to
> >> googling up your generic bad-advice webforum that said that worked for
> >> someone with a heavy sounding nickname, but we can deal with that.
> >> Moreover, as I've been experiencing on the ALSA list for a while now (where
> >> I've been somewhat responsive to ISA related issues) basically anything but
> >> PnPBIOS/ACPI ISA is mostly dead and as said, with an isapnp=0 in the drivers
> >> there which known issues are using, there's no difference.
> >> Advice is always good, but I'd not put in the ALSA documentation (wrong
> >> place) and even in the changelog it sounds a bit overly alarming in my own
> >> opinion. The expected fall-out is... <crickets>...
> > Hm, but still some notes are needed for ALSA-Configuration.txt
> > mentioning that the resource parameters like port, io, etc can be used
> > only when isapnp=no on some drivers. The parameters are still there,
> > so people may wonder if it has no use.
> Okay, something like this? Incremental...
> By the way, eventually I'd in fact probably like to move some of the drivers
> that now still support legacy ISA over to PnP only. After all, chips such as
> the CMI8330, CS4232+, ES1869+ and OPL3SA2 _are_ PnP only chips.
> Certainly for CS4232+ and ES1869+ that can't be done currently as we know
> people are in fact using isapnp=0 to work around PnPBIOS issues but from the
> previous report there it seemed that might actually just consist of the BIOS
> claiming no resource change is possible, which pnp_activate_dev (through
> pnp_autoconfig_dev) insist on anyway. This would be something to fix inside
> PnP instead...
Well, I'm not sure about that. Certainly there are some users that
use isapnp=no with explicit parameters.
> Anyways, here's just a further Documentation update. You once told me to
> start new threads for patches, but that seems clumsy now... :-|
Thanks. It seems that people do care more on explanations about the
removal of options. Could you add that, too?
Just mention about sysfs as alternative way to change the
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