[linux-dvb] cx23885 driver and DMA timeouts
stoth at linuxtv.org
Mon Jun 23 14:51:10 CEST 2008
stev391 at email.com wrote:
> The card works perfectly using Chris Pascoe's branch, I can use both
> tuners at the same time. It only stuffs up when I try and merge the
> relevant sections into tip, as per the patch I attached in the previous
> email. So this eliminates bios/hardware faults. I can also try in
> windows for you, but I'm sure this is not the fault.
> I would like to run a more modern version of the hg code as I have other
> cards sitting around that could go in the same system and also I fear
> that if somebody doesn't do the work to get it into tip, support will
> disappear for newer kernels.
> Thanks for help, any further advice?
> (Also you lost me a bit with sram and risc, is this for the
> microprocessor on the tv card or is it on my motherboard/cpu? And do you
> have any documentation about them so I can learn more about it?)
> ----- Original Message -----
> From: "Steven Toth"
> To: stev391 at email.com
> Subject: Re: [linux-dvb] cx23885 driver and DMA timeouts
> Date: Sat, 21 Jun 2008 08:54:39 -0400
> > As soon as I try to access both cards at the same time it breaks
> > and only a full computer restart will fix it, i have tried
> > unloading all the modules that I can find that this card uses and
> > loading them again. I get the syslog attached below (cx23885 with
> > debug =1). It doesn't matter what progam i use to access them
> > (tried gxine, totem, mythtv) it all works the same, only one at a
> > time or it breaks.
> If the vidb and vidc (ts1 / ts2) bridge streams each single channel
> correctly, but not both together then this is either a sram
> configuration issue (the risc engine's workspace is being corrupted
> by another risc channel), or your system has a pcie compatibility
> I've seen both of these issues in the past.
> I don't have a hardware product with demodulators on vidb and c, so
> that's not something I can repro.
> Can you dual boot the same system under windows and remove any pcie
> compatibility doubts?
> - Steve
No need to try windows, if you have the driver already running (pascoe's
patches) then your chipset and hardware are fine.
Sounds like you have a simple merge issue.
Try to figure out which parts of the merge actually create the problem
then bring that issue back to this list for discussion.
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