KWorld ATSC 110 and NTSC [was: 2.6.25+ and KWorld ATSC 110 inputs]
Hi Bill,
Quoted 6 lines · Bill Pringlemeir
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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Re: KWorld ATSC 110 and NTSC
Quoted 9 lines · On 30 Nov 2008, [email protected] wrote:
Quoted 5 lines · Bill Pringlemeir
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.
http://marc.info/?l=linux-video&m=121210186625441&w=2
[... blah blah blah ...]
I did investigate some of the difference between 2.6.24 and more recent kernels. The code is far better; user should expect some pain. I was just hoping I was helping with a new issue; but I guess the kernel lags behind mecurial.
Quoted 9 lines
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).
Quoted 5 lines
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.
Google was not helpful at showing me this thread. I patch and used 'rmmod tuner; modprobe tuner'. This allow NTSC reception.
Quoted 7 lines
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
No, having an i2c driver muck with a tuner is not nice (it is what was in the 2.6.24 kernel).
Couldn't the nxt200x driver be placing outputs in OC state via a 'hw_init' and 'hw_fini' type callback (or maybe hw_quiescent). Switching between analog and digital demodulators would need something like this? When tuner-simple switches A/D, it needs to make a call up to the main saa7134 driver to ask for the demodulators (nxt200x) to be put in the right state (or is the saa7134 already aware of this switch?). At least, that is what somebody who knows nothing about this code would expect.
Thanks,
Bill Pringlemeir.
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