[linux-dvb] [PATCH 6/6] DVB-PinnSat: Misc cleanup and robustness tweaks

Edgar Toernig froese at gmx.de
Wed Jan 11 15:46:23 CET 2006

Sigmund Augdal Helberg wrote:
> On Wed, 2006-01-11 at 15:07 +0100, Edgar Toernig wrote:
> >
> > Well it does improve that situation in so far as the card is unusable
> > in my system without these changes.  Without lowering the fifo trigger
> > level (but with the other changes) I got it working but occasionally,
> > especially when using the USB bus, I still got fifo overflows.  With
> > the lowered fifo trigger level that's gone.
> Is there some messages I can look for that appear when the fifo
> overflows? That I perhaps could count with and without the change?

You get something like this in the system log:

| Jul 16 21:07:24 smutje kernel: bt878(0): irq FDSR risc_pc=21720110

If you've never seen that then you don't need the patch (but won't
hurt neither).

> If you are saying that without these changes your card doesn't work at
> all, then that should be a strong argument for keeping card specific
> stuff, because I've got quite a few cards working well without these
> changes.

It's not the card but the interaction between the Bt878 and the mother-
board's PCI chipset.  Some motherboards are fine and never show the
problem, others only when using SATA DMA, others (like mine, ATI IXP)
all the time.

Ciao, ET.

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