[vdr] VDR and Hybrid DVB Cards ( was "HVR 4000 drivers broken - adapter0/frontend1 busy" in linux-media list )

Steffen Barszus steffenbpunkt at googlemail.com
Tue Nov 15 11:52:18 CET 2011


2011/11/15 Hawes, Mark <MARK.HAWES at au.fujitsu.com>:
>>What i got from previous discussions on linux-media is, that if the
>> device nodes are created within one adapter, an application needs to
>> assume that
>> the devices can not be used concurrently and needs to close
>> one "device node group" before opening the other one.
>>
> This suggests a constraint in the current design of the way VDR handles
> the detection and use of DVB devices in that it cannot handle so called
> 'hybrid' cards where two (or more!) frontends are attached via a single
> adaptor without restarting VDR and identifying which frontend to use.
>
> As already mentioned I wish to use both cards on my system and I'd be
> interested and happy to help in developing a patch to overcome this
> constraint. However I would need some VDR architectural guidance to
> suggest how this might be done with minimal disruption to the current
> DVB device handling. Any direction would be much appreciated.

What i said above is AFAIK more or less undocumented up to now. But it
seems to be a consensus between most driver developers now.

Yes vdr needs to change to handle this devices properly based on the
previous assumptions, i think soneone else can be more helpful than me
;).



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