[linux-dvb] Re: Not going to work with v4l + dvb? Tuner issues?

[Holger Waechtler <holger@convergence.de>]

Chris Pitchford wrote:
> Hi all!
> 
> I must admit I'm VERY new to this project but so far, its looking really
> exciting. I'm becoming more and more interested in PVR technologies for
> linux and now have a collection of capture/tv cards and I'm starting to
> look at developing drivers for some.
> 
> At the moment I have (or rather would like to use)
> 
> WinTV  Nova-T  (terrestrial digital card)
> WinTV  PVR     (AM TV receiver card with realtime mpeg2 encoder onboard)
> 
> I have, indivually, got both cards working.. (for those following search
> engines, I have not got the MPEG encoder on the PVR working yet, though it
> is something I am extremely interested in at the moment)
> 
> I have hit a snag. the BTTV drivers, as used by the WinTV PVR card feature
> a module called tuner.o    as does the dvb drivers. this poses a problem
> 
> Here's an extract from my modules.conf
> ----
> 
> # WinTV PVR options
> options		i2c-core	i2c_debug=0
> options		bttv		card=0x10 radio=1 pll=1 autoload=1 fieldnr=1
> options		tuner		type=5
> options		msp3400		debug=0
> pre-install	bttv		( /etc/kfir/install.sh );
> 
> 
> #WinTV Nova-t options:
> 
> options dvb     init_chan=2 pids_off=0
> 
> ----
> 
> The problem I face is the "type=5" option to the tuner module. I have
> removed the tuner.o that accompanies the BTTV driver and left the tuner.o
> that is in the latest CVS DVB (I also tried last release)
> 
> Specifying type=5 now means tuner.o is restricted to working with the
> WinTV/PVR card.. ommiting this value, means tuner.o will indeed work with
> the Nova-T driver.. but NOT with the PVR card.. it seems I cannot get them
> both to work at the same time.
> 
> What are the advantages to having a type parameter to the tuner.o module.
> It would be better if the instance of the tuner chipset itself specified
> the type. Specifying explictly the type implies all the "tuner" devices
> are of the same time.. Does anyone know a) what type the Nova-T is and b)
> if it is possible to specify multiple "types" in the options for the
> tuner.o
> 
> In actual fact I'm going to investigate this problem myself but I would
> really like to hear others view/experiences on mixing digital and BTTV
> hardware in the same box

Use the NEWSTRUCT branch from CVS and your problem is gone. check it out 
using

$ cvs -d :pserver:anonymous@linuxtv.org:/cvs/linuxtv login
[press enter]
$ cvs -d :pserver:anonymous@linuxtv.org:/cvs/linuxtv \
       -r NEWSTRUCT DVB

update it using

$ cvs -dPrNEWSTRUCT

this is compatible with the driver for analog TV cards.


> Asides from this hardware complication, and the difficulties installing an
> additional TV aerial, I managed to have the DVB support up and running,
> with two channels displayed concurrently (which was an extreme novelty!)
> within about an hour! Great work! I only wish the Nova-T had "tv-out"

For this feature you have to buy a full-featured card (no Budget or 
NOVA) with onboard MPEG-Decoder.

Holger



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