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* KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs]
@ 2008-12-01  1:40 CityK
  2008-12-01  2:47 ` Vanessa Ezekowitz
  0 siblings, 1 reply; 6+ messages in thread
From: CityK @ 2008-12-01  1:40 UTC (permalink / raw)
  To: V4L

stuart wrote:
> V4L support for the KWorld ATSC120 is limited.  There a numerous threads 
> here which talk about the problems and some work arounds.  The 
> developers have talked about adding support but consider new features at 
> the cost of an overhaul of the current driver.
>
> Right now I believe you can not use both ATSC and NTSC tuners w/o power 
> cycling your computer and bringing it up with (only) the appropriate 
> driver.  Also, I don't believe the IR receiver works under V4L.  This 
> card replaced the Kworld 110 and Kworld 115 tuners.  If you can find 
> these older Kworld ATSC tuners, I would buy them instead as I believe 
> they are better supported under V4L (I also have a Kworld ATSC110 - but 
> only use it for ATSC tuning as well).
>
> Go here and read up on how people are setting this card up:
> > http://www.linuxtv.org/wiki/index.php/KWorld_ATSC_120
>
> I'm using the Kworld 120 as an ATSC tuner and nothing else in a Debian 
> mythtv slave back end system.

Stuart, while I don't know for sure, I believe that information about
the power cycling is now obsolete and the driver for the ATSC 120 is
working.

In any regard, such things are not related to the difficulties Bill is
experiencing with his 110 card.  I'll detail in the next message.

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^ permalink raw reply	[flat|nested] 6+ messages in thread
* KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs]
@ 2008-12-01  2:09 CityK
  0 siblings, 0 replies; 6+ messages in thread
From: CityK @ 2008-12-01  2:09 UTC (permalink / raw)
  To: V4L, bpringle, Mauro Carvalho Chehab, Michael Krufky

Hi Bill,

Bill Pringlemeir wrote:

> I have experimented with this a bit further.  Here are some of my
> observations,
>  
> I switch the antenna feed between top and bottom inputs with no effect
> on getting the NTSC signal.
>   

The NTSC issue is a known problem.

I tracked the error down to a commit Mauro had made (IIRC, back in
April) which ended up causing a regression on some boards  (e.g. KWorld
ATSC 110/115).  M.Krufky spun a quick patch (which works fine), but it
cannot be applied to the main Hg sources as it too would break other
things, and so some discussion would be needed to resolve the underlying
problem.  I was going to bug Mauro about the issue, but never got around
to it, and I don't know if Mike discussed this with Mauro at the recent
Plummers conference.  (I have cc'ed both in on the message).

Several posters on AVS forums were complaining of this and I posted a
link to Mike's patch and instructions (including a warning that it could
break support with other cards).  AFAIK, zero feedback was achieved from
that, as posters were either too scared by the warning or couldn't
follow the instructions, nor responded to further posts.  Whatever.

In any regard, Mike's patch, as I said, works fine, albeit is not a
perfect solution as it requires some manual intervention (or script) on
the part of the user to enable the analogue TV functionality.

Mauro -- the exact changeset in question is:   7753:67faa17a5bcb
Mike's patch is located at:
http://linuxtv.org/~mkrufky/fix-broken-atsc110-analog.patch




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^ permalink raw reply	[flat|nested] 6+ messages in thread
* 2.6.25+ and KWorld ATSC 110 inputs.
@ 2008-11-26  6:51 Bill Pringlemeir
  2008-11-30 20:15 ` KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs] Bill Pringlemeir
  0 siblings, 1 reply; 6+ messages in thread
From: Bill Pringlemeir @ 2008-11-26  6:51 UTC (permalink / raw)
  To: video4linux-list


I use tvtime and mplayer to view ATSC and NTSC content OTA.  I have
the same input for both and prefer not to split it due to loss.
Anyways, with 2.6.24 series and below the drivers seems to pick the
inputs 'properly' for my needs.  Now they don't.  I looked through the
source and it seems that things are being structured more sanely.

I have the following output when I set debug=1 for tuner_simple and
run 'mplayer dvb://',

tuner-simple 1-0061: using tuner params #1 (digital)
tuner-simple 1-0061: freq = 509.00 (8144), range = 2, config = 0xc6, cb = 0x44
tuner-simple 1-0061: Philips TUV1236D ATSC/NTSC dual in: div=8848 | buf=0x22,0x90,0xc6,0x44


I don't get any output when running either tvtime or 'mplayer tv://'.
Is there some userspace ioctl call that should be made to set the
antenna input for NTSC content?  I also tried setting the atv_input
and dtv_input values.  This didn't seem to change anything.

I started getting lost in the code.  Why does simple_std_setup() check
for V4L2_STD_ATSC and then unconditionally use atv_input?  Maybe that
simple_set_rf_input() is undone at a later time?

Thanks for any info.  Search engines are sparse with information on
tuner_simple parameter information.  Although I expect I need some
code that does ioctls to the tuner modules.

Regards,
Bill Pringlemeir.

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^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2008-12-01  3:18 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-12-01  1:40 KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs] CityK
2008-12-01  2:47 ` Vanessa Ezekowitz
2008-12-01  3:18   ` CityK
  -- strict thread matches above, loose matches on Subject: below --
2008-12-01  2:09 CityK
2008-11-26  6:51 2.6.25+ and KWorld ATSC 110 inputs Bill Pringlemeir
2008-11-30 20:15 ` KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs] Bill Pringlemeir
2008-11-30 19:55   ` stuart

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