* Re: Fw: PATCH: creating devices for multiple sound cards
@ 2001-08-02 23:42 Chris Rankin
0 siblings, 0 replies; 6+ messages in thread
From: Chris Rankin @ 2001-08-02 23:42 UTC (permalink / raw)
To: nerijus; +Cc: linux-kernel
Hi,
I saw your email on linux-kernel; actually I'm glad
that patch *wasn't* applied because I think it was
flawed. I have recently posted a newer version to
linux-sound and sound-list@redhat.com in the hope that
the 2.4 soundcore maintainer would pick it up.
Who *is* the soundcore maintainer for 2.4? The
MAINTAINERS file says that Alan Cox is the 2.2
maintainer only.
I'll email the latest patch to linux-kernel as well,
since linux-sound appears to be dead these days.
Cheers,
Chris
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Fw: PATCH: creating devices for multiple sound cards
2001-08-03 17:11 ` Bill Pringlemeir
2001-08-03 17:22 ` Alan Cox
2001-08-03 17:40 ` Chris Rankin
@ 2001-08-03 20:25 ` Zach Brown
2 siblings, 0 replies; 6+ messages in thread
From: Zach Brown @ 2001-08-03 20:25 UTC (permalink / raw)
To: Bill Pringlemeir; +Cc: Chris Rankin, linux-kernel, nerijus
> If ALSA will replace OSS, then does it make it somewhat futile to add
> things to the current set of sound drivers?
Not at all. As Alan said, its going to be quite a while before people
are seriously using 2.[56]. Until then its OSS for the majority of
users.
- z
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Fw: PATCH: creating devices for multiple sound cards
2001-08-03 17:11 ` Bill Pringlemeir
2001-08-03 17:22 ` Alan Cox
@ 2001-08-03 17:40 ` Chris Rankin
2001-08-03 20:25 ` Zach Brown
2 siblings, 0 replies; 6+ messages in thread
From: Chris Rankin @ 2001-08-03 17:40 UTC (permalink / raw)
To: Bill Pringlemeir, Zach Brown; +Cc: Chris Rankin, linux-kernel, nerijus
ALSA won't replace OSS overnight, and so a small
amount of OSS-maintenance can't possibly hurt. For
example, I use the OSS version of the emu10k1 driver
for DVD sound because the OSS one is realtime-capable
(and so provides better synchronisation) but the ALSA
one isn't yet.
Besides, the API I've tried to fix is actually *used*
by ALSA to provide OSS-emulation devices, except that
it doesn't work on a devfs-based machine with multiple
sound cards because all the device names clash.
Cheers,
Chris
--- Bill Pringlemeir <bpringle@sympatico.ca> wrote:
> >>>>> "Zach" == Zach Brown <zab@zabbo.net> writes:
> [snip]
> Zach> doing many other things. Hopefully the
> kernel side of ALSA
> Zach> will be acceptable for inclusion in 2.5. At
> least it has an
> Zach> army of people actively maintaining it.
>
> If ALSA will replace OSS, then does it make it
> somewhat futile to add
> things to the current set of sound drivers? I was
> going to look at
> the SBLive driver. I have been side tracked by an
> xterm bug; it seems
> to have bad handling of utmp on Linux.
>
> regards,
> Bill Pringlemeir.
>
__________________________________________________
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Fw: PATCH: creating devices for multiple sound cards
2001-08-03 17:11 ` Bill Pringlemeir
@ 2001-08-03 17:22 ` Alan Cox
2001-08-03 17:40 ` Chris Rankin
2001-08-03 20:25 ` Zach Brown
2 siblings, 0 replies; 6+ messages in thread
From: Alan Cox @ 2001-08-03 17:22 UTC (permalink / raw)
To: Bill Pringlemeir; +Cc: Zach Brown, Chris Rankin, linux-kernel, nerijus
> If ALSA will replace OSS, then does it make it somewhat futile to add
> things to the current set of sound drivers? I was going to look at
> the SBLive driver. I have been side tracked by an xterm bug; it seems
> to have bad handling of utmp on Linux.
Most folks I know are using utmpter for that - it avoids xterm being setuid
setgid or anything else that you really dont want to make it.
As to the sblive - well its probably 2 years away from 2.6 and much of the
work is being shared - the same bugs turn up in both ALSA and OSS quite
often and several OSS drivers are based off ALSA ones
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Fw: PATCH: creating devices for multiple sound cards
[not found] ` <20010802201329.A3034@erasmus.off.net>
@ 2001-08-03 17:11 ` Bill Pringlemeir
2001-08-03 17:22 ` Alan Cox
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Bill Pringlemeir @ 2001-08-03 17:11 UTC (permalink / raw)
To: Zach Brown; +Cc: Chris Rankin, linux-kernel, nerijus
>>>>> "Zach" == Zach Brown <zab@zabbo.net> writes:
[snip]
Zach> doing many other things. Hopefully the kernel side of ALSA
Zach> will be acceptable for inclusion in 2.5. At least it has an
Zach> army of people actively maintaining it.
If ALSA will replace OSS, then does it make it somewhat futile to add
things to the current set of sound drivers? I was going to look at
the SBLive driver. I have been side tracked by an xterm bug; it seems
to have bad handling of utmp on Linux.
regards,
Bill Pringlemeir.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Fw: PATCH: creating devices for multiple sound cards
@ 2001-08-02 22:16 Nerijus Baliunas
0 siblings, 0 replies; 6+ messages in thread
From: Nerijus Baliunas @ 2001-08-02 22:16 UTC (permalink / raw)
To: linux-kernel, Chris Rankin, linux-sound
Hello,
Why this patch was not applied (I checked 2.4.7)?
------ Forwarded message ------
From: Chris Rankin <rankinc@pacbell.net>
Date: Sat, 14 Apr 2001 09:44:35 +0200
Subject: PATCH: creating devices for multiple sound cards
To: linux-sound@vger.kernel.org
Hi,
I have just installed a new sound card in my machine, and have left
the built-in sound chip enabled despite the motherboard manufacturer's
warning of Bad Things. The result is that I now have two sound devices
in my machine - an ICH (i810_audio) and a Soundblaster Live! The Live!
is device 0, of course. Anyway, I am using the ALSA drivers because
the native i810_audio module caused a kernel panic (NULL pointer
reference in an interrupt handler, I believe), and I have noticed that
the ALSA drivers have difficulty creating OSS device nodes for both
cards. I have traced the problem to the register_sound_special()
function within Linux's soundcore.o module. Basically, ALSA uses this
function to create OSS devices, but this function was never written
with more than one sound device in mind. Until now.
A few points about this patch:
1. I have renamed "sequencer2" to "music" because of a potential naming
conflict between devices 14,8 ("music" on card 0) and 14,33 ("sequencer"
on card 2).
2. I have renamed device "midi00" to "midi". "midi01" now becomes "midi1"
as well, although I would also point out that this is now consistent with
the behaviour of the register_sound_midi() function.
Having applied this patch, ALSA gives me two mixer devices in /dev/sound,
and I no longer get messages like these in my logs:
Apr 12 01:36:54 (none) kernel: devfs: devfs_register(): device already registered: "unknown"
Apr 12 01:40:04 (none) kernel: devfs: devfs_register(): device already registered: "mixer"
Apr 12 01:40:04 (none) kernel: devfs: devfs_register(): device already registered: "dsp"
Cheers,
Chris
--- linux-2.4.3/drivers/sound/sound_core.c.orig Fri Mar 16 23:00:44 2001
+++ linux-2.4.3/drivers/sound/sound_core.c Sat Apr 14 00:13:18 2001
@@ -227,9 +227,10 @@
int register_sound_special(struct file_operations *fops, int unit)
{
- char *name;
+ const char *name;
+ const int minor = (unit & 15);
- switch (unit) {
+ switch (minor) {
case 0:
name = "mixer";
break;
@@ -237,7 +238,7 @@
name = "sequencer";
break;
case 2:
- name = "midi00";
+ name = "midi";
break;
case 3:
name = "dsp";
@@ -255,7 +256,7 @@
name = "unknown7";
break;
case 8:
- name = "sequencer2";
+ name = "music";
break;
case 9:
name = "dmmidi";
@@ -279,7 +280,7 @@
name = "unknown";
break;
}
- return sound_insert_unit(&chains[unit&15], fops, -1, unit, unit+1,
+ return sound_insert_unit(&chains[minor], fops, -1, minor, minor+128,
name, S_IRUSR | S_IWUSR);
}
To unsubscribe from this list: send the line "unsubscribe linux-sound" in
the body of a message to majordomo@vger.kernel.org
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2001-08-02 23:42 Fw: PATCH: creating devices for multiple sound cards Chris Rankin
[not found] <E15SSDc-0001o9-00@the-village.bc.nu>
[not found] ` <20010803000239.91173.qmail@web13105.mail.yahoo.com>
[not found] ` <20010802201329.A3034@erasmus.off.net>
2001-08-03 17:11 ` Bill Pringlemeir
2001-08-03 17:22 ` Alan Cox
2001-08-03 17:40 ` Chris Rankin
2001-08-03 20:25 ` Zach Brown
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2001-08-02 22:16 Nerijus Baliunas
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