[ivtv-users] cx18: Possible causal realtionship for HVR-1600 I2C errors

[Andy Walls]

On Mon, 2008-08-04 at 14:58 -0400, Gerhard R. Wittreich wrote:
> Andy,
> 
> I added a few notes to my setups
> 
> --Gerhard
> 
> 

> >
> >
> > Here are my collected reports.
> >
> > Non-working (under linux) setups:
> >
> >
> > Reporter:    Gerhard Wittreich
> > PCI Chipset: Intel 82845 & 82801BA
> > PCI Version: V2.2 (82801)
> > AGP:         Yes
> > Video:       AGP ATI Technologies Inc Rage 128 Pro Ultra TF
> also
> Video:       PCI  nVidia Corporation NV44A [GeForce 6200]
> OS1:          Ubuntu 8.04 (Mythbuntu 8.04.1)
> OS2:          Fedora 9 Live HD Install
> > Symptoms:    cx18 driver fails to init due to apparent I2C bus errors,
> > but one set of CX23418 I2C control registers is acting normally while
> > the other set is returning bogus values when read (identical to the
> > values in Matt Loomis' reports).
> >
> >
> > Working setups:
> >
> > Reporter:    Gerhard Wittreich
> > PCI Chipset: nVidia MPC61
> > PCI Version: Unknown but it's a PCIe chipset, so assuming > v2.2
> > AGP:         no
> > Video:       PCIe nVidia Corporation G70 [GeForce 7600 GT]
> OS:        Fedora 9
> > Symptoms:    No problems; card works.
> >
> >
> > Reporter:    Gerhard Wittreich
> > PCI Chipset: Intel 82915G* & 82801F*
> > PCI Version: v2.3 (82801F*)
> > AGP:         no
> Video:       PCIe nVidia Corporation GeForce 8600 GT
> OS:          Ubuntu 8.04 (Mythbuntu 8.04.1)
> > Symptoms:    No problems; card works.
> >

> > I'd be interested in additional reports of:
> >
> > 1. Errors I made in the above collected data.
> >
> > 2. A CX23418 based card working properly or not under Linux (or Windows)
> > in a machine with a PCI v2.2 or earlier chipset.
> 
> I have a 00:1e.0 PCI bridge: Intel Corporation 82801AA PCI Bridge (rev  
> 02) running Fedora Core 5.  Just need to find some time to test the  
> card in that machine.

I just pulled a junker out of the closet with an 82801AA southbridge as
well.  It only accepted low profile PCI cards, so I had to perform a
*ahem* case modification with a pair of metal cutters. :D

I just installed Fedora 9 on it, so now I need to get the kernel
development headers on it and build v4l-dvb.  I'll also report on how
that goes.




> > 3. The differences between PCI v2.2 and v2.3 that would cause PC v2.2
> > host writes to a PCI v2.3 device to fail or for reads to return bogus
> > values (i.e. reading back 0x7 after a value of 0x21c0b was just
> > written.)?

I've read about some of the differences between PCI versions 2.2 and
2.3.  The only thing that looks like it could cause a problem is new
rules about the IDSEL signal, which is used when making configuration
access, I think.

I need to see if lspci presents what the kernel thinks the configuration
is or what the pci devices' hardware is actually set at.

Regards,
Andy

> > 4. If anyone knows what magical tweak Windows or the Hauppauge HVR-1600
> > Windows driver is making to get the HVR-1600 working with (at least) the
> > VIA VT8363 & VT82C686.
> >
> > Regards,
> > Andy