[alsa-devel] snd-hda-intel and MSI
tiwai at suse.de
Wed Sep 23 17:43:55 CEST 2009
At Wed, 23 Sep 2009 16:33:06 +0200,
Elimar Riesebieter wrote:
> Hi folks,
> are there any contradictions to enable-msi=1 by default?
MSI is broken on some platforms. IIRC, almost all non-Intel platforms
didn't work until the recent ones. So, it can't be enabled blindly as
> There are
> users with chips like an
> 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
> Subsystem: Hewlett-Packard Company Device 30f7
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin B routed to IRQ 33
> Region 0: Memory at dc500000 (64-bit, non-prefetchable) [size=16K]
> Capabilities: <access denied>
> Kernel driver in use: HDA Intel
> which only works with MSI. And it is somewhat hard to find the appropriate
> Documantation in HD-Audio.txt.
A patch is always welcome.
> 2nd it will be very hard for Distributers to
> maintain modul options by chip ID's.
It's not a question for distributors but the upstream maintainers
to maintain the quirk table :)
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