[linux-dvb] Re: Some progress on Siemens DVB-C analog TV module

[Michael Hunold <hunold@convergence.de>]

Hello Dominik,

> with your latest changes, xawtv recognizes the tuner.
Ok.

> The picture is only black (but I expected this as your latest checkin 
> commment talks about non working behavior), 
You should see the usual "snow" when changing to the analog input.

> overlay doesn't work .
> xawtv prints:
> ioctl: VIDIOC_OVERLAY(int=1): Resource temporarily unavailable
Hmm, you're right. I must have broken something.

> Unfortunately there is still something wrong with the device settings in
> av7110_vv_data_c. For my card (FSC 1.3), the OSD looks much better if 
> the flags field contains SAA7146_EXT_SWAP_ODD_EVEN.
Apparently the DVB part and the analog part put out the fields in a 
different order.

That's not a big problem, there are several ways to fix this. You can 
manually swap the fields (the flag SAA7146_EXT_SWAP_ODD_EVEN toggles 
this), invert the field detection order in the saa7146 (doesn't work 
reliably, but without using a logic analyzer I cannot really tell why) 
or you can change the programming of the saa7113 (which currently uses 
the Windows settings).

I guess changing the programming of the saa7113 is the best thing to do, 
I'll need to have a deeper look into this anyway in order to get vbi 
capture for the analog input going...

Feel free to have a look at the saa7113 specs for yourself, they are 
freely available from Philips:
http://www.semiconductors.philips.com/acrobat/datasheets/SAA7113H_1.pdf

> If you want, I can send you 2 screnshots which illustrate the behavior.
I know what you mean: the picture looks very unsharp, after setting the 
flag, the effect is gone.

> Regards
> Dominik
CU
Michael.



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