[linux-dvb] Re: Network: a new hope

["Robert Schlabbach" <robert_s@gmx.net>]

From: "Emard" <emard@softhome.net>
> > > Some issues seem more like a bug than "graceful recovery",
> > > particularly the fact that the SAA7146A will sometimes not _finish_
> > > DMA transfers. With burst and FIFO threshold set to 4 Dwords, the
> > > chip _randomly_ does not DMA the last 2-8 Dwords. I'd say the
> > > SAA7146A's PCI logic is simply bugged.
>
> not bugged, it's even worse: it has too small FIFO compared to other
> conccurrent PCI devices

That, too, but if that was the issue I am seeing, it would occur _anywhere_
during the DMA transfer. But the fact that I regularly only get missing
Dwords at the _end_ of a transfer means that the SAA7146A tends to stop
transferring too early, and that is not a question of FIFO length...

Out of curiousity: Does anyone here know a better suited PCI bridge chip?
Maybe one that is dedicated to MPEG2TS-to-PCI DMA and has none of that
obsolete analog video stuff in it?

Regards,
--
Robert Schlabbach
e-mail: robert_s@gmx.net
Berlin, Germany



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