Subject: Re: [linux-audio-user] audiophile 2496 - spdif in
From: Rick Taylor (ricktaylor_AT_speakeasy.net)
Date: Sun Oct 12 2003 - 04:46:50 EEST
"wes schreiner" <wes_AT_infosink.com> wrote:
>Clemens Ladisch wrote:
>>>wes schreiner wrote:
>>>The support for using lspci/setpci is in all 2.4.x kernels I think, but
>>>it doesn't always do what you want. I have a Zoran 36057 video capture
>>>device sitting on IRQ 10, same as my sound card. IRQ 9 is unused (no
>>>ACPI), so I just tried "setpci -v -s 03:09.0 INTERRUPT_LINE=09" to
>>>change its IRQ. lspci -v still says it is at IRQ 10, but lspci -b -v
>>>says it is at IRQ 9. Which is it? OK, I modprobe zr36067 and the module
>>>loads, and now both lspci -v and lspci -v -b agree that the Zoran chip
>>>is at IRQ 10, so nothing changed.
>>
>>The interrupt_line register doesn't affect the card in any way, it's
>>there for information purposes only. The BIOS sets this register so
>>that drivers know which interrupt to use.
>>
>>To change the interrupt routing, you have to reprogram some registers
>>of the PCI controller (starting at 60h in Intel's ICHx southbridges
>>IIRC, but read Intel's datasheet first). And I don't know if the
>>kernel is able to realize that the interrupt has changed.
>>
>>HTH
>>Clemens
>
>Well there we go, so it's back to juggling cards in PCI slots and
>switching motherboards. I can report that irqtune does indeed change the
>interrupt priority though, using kernel 2.4.21. That might help someone.
>
>wes
http://www.rt.com/man/setserial.8.html
http://www.scyld.com/diag/
http://www.opsycon.com/PMON2000/OnlineManual/CmdRef/cmd_pcfg.htm
etc
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