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