[linux-dvb] dib0700 problems (nova-T usb stick)

Patrick Boettcher patrick.boettcher at desy.de
Mon Jun 11 15:19:49 CEST 2007


On Mon, 11 Jun 2007, Soeren Moch wrote:

> Patrick Boettcher wrote:
> > Hi,
> > 
> > The biggest problem is, that we have no time to investigate the issue 
> and 
> > it is no problem on the Windows-platform (because of a different call 
> > sequence).
> > 
> > It has nothing to with the I2C-gating used. It is a basic problem of 
> doing 
> > I2C while streaming is enabled. Not 100% what is exactly the problem.
> > 
> > I filed the problem to the correct guys at DiBcom - they will see 
> (sooner 
> > or later).
> 
> Hi Patrick,
> 
> maybe the DiBcom guys can also have a look on the disconnect problem,
> which also seems to be related to the REQUEST_ENABLE_VIDEO firmware call.
> The first urb received after switching video streaming on has in almost
> all cases a error return state, sometimes a disconnect occurs (only
> directly after a REQUEST_ENABLE_VIDEO call, Version 02-rc2 firmware used).
> The firmware seems to deliver corrupt data after stream-on.
> 
> Since the i2c gating problem can be solved with the driver patch, the
> disconnect problem is the last real problem with this stick.
> As the 0700 bridge seems to be part of the shiny new 7770 device, fixing
> this firmware shouldn't be wasted time for DiBcom.

We don't see the i2c-problem with 7770. And the disconnects are (for 
me) just another symptom (like the I2C-failures) for the real problem 
(which we have not yet understood).

Patrick.



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