linux1394 and f8

[Fernando Lopez-Lezcano]

On Wed, 2007-10-31 at 15:45 +0100, Hans de Goede wrote:
> Will Woods wrote:
> > On Wed, 2007-10-31 at 13:46 +0000, Peter Robinson wrote:
> >>> I am running 7.92, and I see that the new firewire stack is in place.
> >>> There is a page at the linux1394 wiki that suggests that kernel
> >>> packagers build the old stack into the kernel for the time being:
> >>>
> >>> http://wiki.linux1394.org/JujuMigration
> >>>
> >>> Any chance of this happenign for Fedora 8?
> > 
> > Short answer: No. We've been using the Juju stack since F7 and we're not
> > moving back, 'cuz Cutting Edge is what we're all about. But see below. 
> > 
> >> Right below where it says the best advise is to use the old drivers it
> >> also says :
> >>
> >> Building the new drivers is only for advanced users (who for example
> >> want the better speed of firewire-sbp2 relative to sbp2, on the
> >> hardware on which the new drivers already work) - and for distributors
> >> who know what is required in userspace to make use of the new drivers
> >> (i.e. a patched libraw1394, a libdc1394 prerelease, adapted scripts
> >> and config files etc.).
> >>
> >> I suspect "distributors who know what is required in userspace" covers
> >> Fedora and hence the required patches are probably all there.
> > 
> > Right. Kristian Høgsberg is the primary author of the Juju stack - he's
> > a Red Hat employee and Fedora contributor. He got all the Juju bits into
> > F7 - the "new firewire stack" has been in place since then.
> > 
> > So nothing's really new for firewire in F8. The only noticeable changes
> > since F7 are some bugfixes, and some changes relating to dvgrab,
> > libraw1394 and isochronous devices (basically cameras and other
> > audio/video devices). 
> > 
> > Iso devices should work everywhere *except* machines with OHCI 1.0
> > controllers. Otherwise you get this message in dmesg:
> > 
> > firewire_ohci: Added fw-ohci device 0000:03:03.0, OHCI version 1.0
> > firewire_ohci:     Isochronous I/O is not yet implemented for OHCI 1.0
> > chips.
> > firewire_ohci:     Cameras, audio devices etc. won't work on this
> > controller with this driver version.
> > 
> > Unfortunately, these turn out to be more common than previously thought.
> > But people are actively working on this problem - see this bug:
> > https://bugzilla.redhat.com/show_bug.cgi?id=Juju_OHCI_1.0
> > 
> > It's possible this will be fixed in an F8 update. It's quite likely to
> > be fixed for Fedora 9. If that's not soon enough, I'm told there's some
> > third-party repositories out there that package up the older stack.
> 
> Correct, most notably planet ccrma (AFAIK)

Yup. The Planet CCRMA realtime kernels had to revert to the old stack
(and as a result I have to track and supercede libraw1394 releases from
Fedora - not good). Non functioning firewire audio interfaces are a bit
of a problem if you do audio. 

-- Fernando