[linux-dvb] [PATCH] Multi protocol support (stage #1)

Johannes Stezenbach js at linuxtv.org
Mon Jun 12 10:57:13 CEST 2006

On Sun, Jun 11, 2006, Alan Nisota wrote:
> Well, as it didn't seem that S2 was going anywhere, I had lost track
> of this conversation a month or so ago, but now that I had to do some
> mythtv work, I am trying to catch up.  I've looked over Manu's patch,
> and associated sample app, and I don't think I really understand how
> this method is supposed to work.

Since you're replying to an old thread, you probably looked at
an out-of-date patch. Manu's latest was posted on June 5.

> Those of us using the genpix cards (subset of DVB-S2) have had to live
> in our own little world in order to watch HD for 3 months now, and I'd
> love to see a path leading to get the S2 capabilities into the kernel
> sooner rather than later.

My understanding is that dish network and thus the genpix
card have nothing to do with DVB-S2, but are just a
proprietary extension which adds 8PSK modulation to DVB-S.

> If there is any way I can be useful to getting a consensus and moving
> forward, please let me know.  I'll be happy to fill in the necessary
> code to make the current implementation usable by apps (specifically
> VDR and MythTV), but there isn't much point if there isn't a growing
> consensus that the current path is the right one.

The main dispute was about how DVB-S2 works, and thus how the
DVB-S2 API should look like. I think  most of this is solved,
except for some bits which can only be determined by experiment
(or if someone can get in contact with the authors of
the DVB-S2 standard).

But then there is also a proposal for extended capabilities
mixed into it. Plus the partial FE_GET_PARAMS with the IGNORE
values (dropped in latest patch). Plus some stylistic issues
(naming, comments). Most of this is OK now from my POV.

Anyway, it needs to be implemented first and proven to
work (especially wrt backwards compat) before it can be merged
into mainline. Maybe this work already happens in private,
or maybe people got tired of the discussions and lost interest...


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