[linux-dvb] Lifeview DVB-T from v4l-dvb and Pinnacle Hybrid USb from v4l-dvb-kernel......help

Markus Rechberger mrechberger at gmail.com
Tue Apr 1 00:59:56 CEST 2008

On 3/31/08, Aidan Thornton <makosoft at googlemail.com> wrote:
> On Mon, Mar 31, 2008 at 12:40 AM, Another Sillyname
> <anothersname at googlemail.com> wrote:
> > I have a machine that has an internal card that's a Lifeview DVB and
> > works fine using the v4l-dvb mercurial sources.
> >
> > I want to add a Pinnacle USB Hybrid stick (em28xx) that does not work
> > using the v4l-dvb sources but does work using the v4l-dvb-kernel
> > version.
> >
> > 1. Will the number of em28xx cards supported by v4l-dvb be increased
> > shortly? (My card id was 94 IIRC ).
> If it's supported by v4l-dvb-kernel, it's entirely possible, yes.
> > 2. Can I mix and match from the sources...i.e. can I graft the em28xx
> > stuff from v4l-dvb-kernel into the v4l-dvb source and compile
> > successfully or has the underlying code changed at a more strategic
> > level?
> Not trivially, since v4l-dvb-kernel contains changes to the core code
> that the em28xx driver relies on and that are incompatible with
> changes in the main v4l-dvb repository since. You can try
> http://www.makomk.com/hg/v4l-dvb-makomk - it's the em28xx and xc3028
> drivers grafted onto a version of v4l-dvb that's about 5 months old at
> this point - though it's really not a great starting point for porting
> them onto newer versions, since you'd want to drop the xc3028 driver
> in favour of the newer one

spreading around your even more broken tree won't help anyone.

This device already had some issues with the v4l-dvb-kernel tree, this
is what I'll do in April.

> > 3. Why did the sources branch? Was there a good technical reason for
> this?
> Supporting the xc3028 silicon tuner needed some changes to support
> hybrid analog/digital tuners better. Unfortunately, Markus couldn't
> come to an agreement with the rest of the developers on how to do it.
> (I think the main concern were that the changes he were proposing were
> rather more invasive than they needed to be and risked breaking
> existing drivers). In the end, someone else coded the equivalent
> functionality in a more backwards-compatible way and merged it in
> stages.
> (It's actually relatively easy to port code from Markus' hybrid tuner
> framework to the v4l-dvb one, though he will never admit so.)

The reason is my trust is gone I asked in September if it's possible
to get those devices work with what's available and I got the answer
it's not.
This stupid fight lasts for more than 2 years already, but I'm the one
who spent weeks on writing code for getting those things supported and
even rewrote code although there was no serious participation in the
discussions I tried to trigger...

If I tell a company that I will add support for something till a given
date I'll do so to keep up the good contacts. Unfortunately this is
not how some people at linuxtv behave and it slows down everything
even for other manufacturers where I'm not involved.

It's me who mostly spent his time on writing any code on mcentral.de,
the code didn't write itself especially Aidan has no respect about
that, neither do some other people. Maybe it's really better to
provide binary only blobs to remember especially such people that it
requires alot work to get those things work.

> > 4. If I can't use the v4l-dvb sources to get my em28xx working what's
> > the chances of getting the v4l-dvb-kernel stuff working for the
> > lifeview flydvb card?
> Not good. Its support for other hardware is, if anything, going to be
> slowly getting worse over time as other drivers have to be modified or
> disabled to make it compile on newer kernels.

that for the other repository (em28xx-userspace2/userspace-drivers on
mcentral.de/hg) is available, although it needs some work with that


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