[linux-dvb] Re : Re : [Patch] saa7146: 'wait_for_debi_done' fixes

Oliver Endriss o.endriss at gmx.de
Fri Oct 12 00:41:14 CEST 2007


manu wrote:
> On 10/10/2007 01:02:46 PM, Oliver Endriss wrote:
> > manu wrote:
> > > On 10/09/2007 06:15:14 PM, Oliver Endriss wrote:
> > > > @all users of saa7146-based cards
> > > >
> > > > (drivers: dvb-ttpci, budget, budget-ci, budget-av)
> > > >
> > > > Please test whether the attached patch has any negative effects.
> > > >
> > > > Two fixes for the 'saa7146_wait_for_debi_done' code:
> > > > (a) Timeout did not work when the routine was called with
> > interrupts
> > > >     disabled.
> > > > (b) Reduce PCI I/O load caused by saa7146_wait_for_debi_done.
> > > >     Seems to be very important on fast machines!
> > > >
> > > > Based on a patch posted by e9hack at vdr-portal.
> > > >
> > > > If nobody complains I will commit this patch next week.
> > >
> > > Well sorry it seems to create an oops on my box. Just to make sure
> > > though: it is the first time I compile and load modules from
> > mercurial
> > > and so could it just be a compatibility problem with my 2.6.20-16
> > > Ubuntu Feisty kernel?
> > 
> > Please make sure that you do not mix v4l/dvb modules from the original
> > kernel and the HG driver, or you will see all kinds of crashes.
> > 
> > First try the HG driver without my patch. If it works, apply the patch
> > and try again.
> > 
> 
> OK now everything looks identical to the bug I described in a previous  
> post: this time CAM is OK looking at the logs (though gnutv -cammenu  
> seems unresponsive whereas it used to work before, did something  
> change, should I recompile it?), but dmesg says no driver found for the  
> frontend...

You do not have to recompile the application.

Just to be sure:
There is no difference whether you apply the patch or not.
Correct?

Are you referring to the thread 'TT S-1500 CI not finding frontend
driver'?

Did the card ever work reliably in this machine?
Type of machine? SMP system?

Did the problem appear after updating the driver?

I2C bus problems might be caused by a broken power supply or mainboard.
You might also try a different pci slot.

CU
Oliver

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