[linux-dvb] Switching tuner to analogue mode on Compro VideoMate DVB-T300

Hartmut Hackmann hartmut.hackmann at t-online.de
Wed Oct 4 22:14:26 CEST 2006


Hi,

Tomislav Bodor wrote:
> Tomislav Bodor wrote:
> 
>>Tomislav Bodor wrote:
>>  
>>
>>>Oops. I sent an empty message by mistake. Here's the real thing (at the
>>>bottom).
>>>
>>>
>>>Hartmut Hackmann wrote:
>>>  
>>>    
>>>
>>>>Hi,
>>>>
>>>>Tomislav Bodor wrote:
>>>>    
>>>>      
>>>>
>>>>>Hartmut Hackmann wrote:
>>>>>
>>>>>      
>>>>>        
>>>>>
>>>>>>Hi,
>>>>>>
>>>>>>Tomislav Bodor wrote:
>>>>>>
>>>>>>        
>>>>>>          
>>>>>>
>>>>>>>Hi,
>>>>>>>
>>>>>>>I am having problems getting the DVB-T300 to switch to analogue mode
>>>>>>>once the digital part of the tuner has been accessed. The only way I
>>>>>>>found seems to be to unload the saa7134-dvb module and reload saa7134.
>>>>>>>I'm using the drivers from vanilla 2.6.18 kernel, but I checked the
>>>>>>>relevant sections (see below) against mercurial and they seem to be
>>>>>>>the
>>>>>>>same.
>>>>>>>
>>>>>>>Now, I have had a look at how this is supposed to be switched back to
>>>>>>>analogue and have found the sleep function (the one used for
>>>>>>>DVB-T300 is
>>>>>>>philips_europa_tuner_sleep) and the way it's called from
>>>>>>>dvb_frontent.c
>>>>>>>after dvb_shutdown_timeout expires. This all seems to work (and the
>>>>>>>sleep function is called correctly), but the tuner stays in digital
>>>>>>>mode.
>>>>>>>
>>>>>>>Does anyone have an idea why this might not work? Maybe the i2c
>>>>>>>messages
>>>>>>>are wrong for this card? Unfortunately this is all completely new
>>>>>>>to me,
>>>>>>>but I'm happy to test any patches :)
>>>>>>>
>>>>>>>
>>>>>>>          
>>>>>>>            
>>>>>>
>>>>>>There have been 2 big changes since i added support for this card.
>>>>>>I worried about the tda9887 merge in the tuner module, but the
>>>>>>effect i worried about is a bit different from what you describe.
>>>>>>- are there any error messages in the kernel log?
>>>>>>- does analog tv work immedeately after module load?
>>>>>>Any additional information will help.
>>>>>>        
>>>>>>          
>>>>>
>>>>>Sure. Unfortunately, I don't know what's useful information and what's
>>>>>not, so I may overload you :)
>>>>>
>>>>>I'll tackle the latter first: analog works just fine after saa7134
>>>>>module is loaded (this for me happens automatically during boot). It
>>>>>continues working even after saa7134-dvb is loaded, all the way until I
>>>>>run any dvb application (e.g. scan or mythbackend with a DVB card
>>>>>configured). Once a dvb device is accessed the card is switched to
>>>>>digital mode (and I can watch digital TV just fine).
>>>>>
>>>>>Now for the first question: from that point onwards digital works fine,
>>>>>but accessing the card in analogue mode (say using tvtime or mythtv via
>>>>>the analogue tuner) produces the following errors in the kernel log:
>>>>>
>>>>>Oct  2 16:04:38 localhost kernel: [  540.007478] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>Oct  2 16:04:38 localhost kernel: [  540.015462] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>Oct  2 16:04:38 localhost kernel: [  540.023452] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>Oct  2 16:04:38 localhost kernel: [  540.131306] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>Oct  2 16:04:38 localhost kernel: [  540.139289] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>Oct  2 16:04:38 localhost kernel: [  540.215214] tuner 1-0061: i2c i/o
>>>>>error: rc == -5 (should be 4)
>>>>>
>>>>>      
>>>>>        
>>>>
>>>>This is the information i was looking for. There is something going wrong
>>>>with the I2c bridge.
>>>>
>>>>    
>>>>      
>>>>
>>>>>They come in batches of six at a time every time I start tvtime and then
>>>>>one at a time every time I change channels.
>>>>>
>>>>>      
>>>>>        
>>>>
>>>><snip>
>>>>    
>>>>      
>>>>
>>>>>And this reminds me: I never downloaded any firmware for tda10046 - it
>>>>>just worked this way, though various documentation says that I should
>>>>>use the get_dvb_firmware script from linux/Documentation/dvb. Why is it
>>>>>working without firmware (out of curiosity)?
>>>>>
>>>>>      
>>>>>        
>>>>
>>>>Some cards have an eeprom with the Firmware. Yours too. In this case,
>>>>the channel decoder boots from this.
>>>>
>>>>This is a quick shot: can you please try to force the card type to69?
>>>>So:
>>>>modprobe saa7134 card=69
>>>>modprobe saa7134-dvb
>>>>(after you unloaded these modules)
>>>>
>>>>Hartmut
>>>>
>>>>
>>>>    
>>>>      
>>>
>>>That did it - it now works as expected: after a delay of about 5
>>>seconds, the tuner switches back to analogue mode. I have had a look at
>>>the way the reference Philips Europa card is set up in saa7134-dvb.c and
>>>I see that DVB-T300 is missing one of the sleep functions - tuner has
>>>one, but the front end doesn't. Maybe there's more, but I don't know.
>>>Not sure what went wrong and when. I presume you know what needs to be
>>>done from this point onwards?
>>>
>>>Anyway, this workaround seems perfectly fine for now. Do you think there
>>>is any functionality I will be missing compared to using card=70?
>>>  
>>>    
>>
>>Ah. I see something missing: the remote input device is not initialised
>>when I use card=69. With card=70 it's initialised correctly. This is a
>>problem - I need the remote. If I try tweaking the code for DVB-T300 in
>>saa7134-dvb to make it more similar to what's going on for Philips
>>Europa reference, will that take me anywhere? Or is it more complicated
>>than that?
>>  
> 
> 
> I have tweaked the Philips Europa reference card (69) to appear to have
> a IR input for the remote (by making minor changes to saa7134-input.c
> and saa7134-card.c (I was talking nonsense when I wanted to edit
> saa7134-dvb.c). Now, obviously this is an ugly hack, but seems to work
> for me at the moment (until card=70 has support for reverting to
> analogue tuner again).
> 
I will provide some Compro related patches soon anyway. May i ask you to
test these then?

Hartmut



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