[linux-dvb] Some tests on Avermedia A700

Eduard Huguet eduardhc at gmail.com
Wed Feb 13 13:23:51 CET 2008


En/na Matthias Schwarzott ha escrit:
> On Monday 11 February 2008, you wrote:
>   
>> En/na Eduard Huguet ha escrit:
>>     
>>> En/na Matthias Schwarzott ha escrit:
>>>       
>>>> On Samstag, 9. Februar 2008, Eduard Huguet wrote:
>>>>         
>>>>> Hi, Matthias
>>>>>           
>>>> Hi Eduard!
>>>>
>>>>         
>>>>>     I've been performing some tests using your patch for this card.
>>>>> Right now neither dvbscan nor kaffeine are able to find any channel on
>>>>> Astra (the sat. my dish points to).
>>>>>
>>>>> However, Kaffeine has been giving me some interesting results: with
>>>>> your driver "as is" it's getting me a 13-14% signal level and ~52% SNR
>>>>> when scanning. Then, thinking that the problem is related to the low
>>>>> signal I have I've changed the gain levels used to program the tuner:
>>>>> you were using default values of 0 for all (in
>>>>> zl1003x_set_gain_params() function, variables "rfg", "ba" and "bg"),
>>>>> and I've changed them top the maximum (according to the documentation:
>>>>> rfg=1, ba=bg=3). With that, I'm getting a 18% signal level, which is
>>>>> higher but still too low apparently to get a lock.
>>>>>
>>>>> I've stopped here, because I really don't have the necessary background
>>>>> to keep tweaking the driver. I just wanted to share it with you, as
>>>>> maybe you have some idea on how to continue or what else could be done.
>>>>>           
>>>> So I can do only this guess:
>>>> I changed demod driver to invert the Polarization voltage for a700 card.
>>>> This is controlled by member-variable voltage_inverted.
>>>>
>>>> static struct mt312_config avertv_a700_mt312 = {
>>>>         .demod_address = 0x0e,
>>>>         .voltage_inverted = 1,
>>>> };
>>>>
>>>> Can you try to comment the voltage_inverted line here (saa7134-dvb.c:
>>>> line 865).
>>>>
>>>> BUT: If this helps we need to find out how to detect which card needs
>>>> this enabled/disabled.
>>>>
>>>> Regards
>>>> Matthias
>>>>         
>>> Hi,
>>>   Nothing :(. Removing (or setting it to 0) the voltage_inverted
>>> member doesn't seem to make any difference. I'm starting to suspect
>>> that there is something wrong with my antennae setup, so I'll test it
>>> later using an standalone STB or by plugging the card into a Windows
>>> computer and using the supplied drivers.
>>>
>>> Regards,
>>>   Eduard
>>>       
>> By the way (sorry if I'm being molest...): I will leave the card in this
>> PC for now, as it's easier fo me to test and develop. As I have also
>> Windows here ¿is there any way we could do any reverse enginnering from
>> Windows driver, etc...?
>>
>>     
>
> I already asked you to compare eeprom output in dmesg. But did you also 
> compare GPIO messages - like init-values read after startup (to detect 
> different wiring)?
> This is from my dmesg output: "saa7133[0]: board init: gpio is a600"
>
> Or just attach dmesg output after a cold boot and loading saa7134 driver (with 
> i2c_scan=1).
>
> Maybe I create a patch where you can select the other existing zl10313 driver.
> So we can compare the logs / functionality.
>
> Matthias
>
>   
Hi,
    Here you have the dmesg output of "modprobe saa7134 i2c_scan=1":

[  773.619247] saa7133[0]: found at 0000:00:09.0, rev: 209, irq: 23, 
latency: 64, mmio: 0xf7ffa800
[  773.619258] saa7133[0]: subsystem: 1461:a7a1, board: Avermedia A700 
[card=132,autodetected]
[  773.619273] saa7133[0]: board init: gpio is 2f200
[  773.865218] saa7133[0]: i2c eeprom 00: 61 14 a1 a7 ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865270] saa7133[0]: i2c eeprom 10: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865312] saa7133[0]: i2c eeprom 20: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865351] saa7133[0]: i2c eeprom 30: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865393] saa7133[0]: i2c eeprom 40: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865433] saa7133[0]: i2c eeprom 50: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865459] saa7133[0]: i2c eeprom 60: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865702] saa7133[0]: i2c eeprom 70: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865727] saa7133[0]: i2c eeprom 80: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865753] saa7133[0]: i2c eeprom 90: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865780] saa7133[0]: i2c eeprom a0: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865810] saa7133[0]: i2c eeprom b0: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865840] saa7133[0]: i2c eeprom c0: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865868] saa7133[0]: i2c eeprom d0: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.865897] saa7133[0]: i2c eeprom e0: 00 01 81 af ea b5 ff ff ff ff 
ff ff ff ff ff ff
[  773.865923] saa7133[0]: i2c eeprom f0: ff ff ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff
[  773.870157] saa7133[0]: i2c scan: found device @ 0x1c  [???]
[  773.883118] saa7133[0]: i2c scan: found device @ 0xa0  [eeprom]
[  773.891907] saa7133[0]: registered device video0 [v4l2]
[  773.892250] saa7133[0]: registered device vbi0
[  774.011780] zl1003x_attach: tuner initialization (Zarlink ZL10036 
addr=0x60) ok
[  774.011805] DVB: registering new adapter (saa7133[0])
[  774.011819] DVB: registering frontend 0 (Zarlink ZL10313 DVB-S)...


These are the results of "lspci -vvnn" (after loading the driver):

00:09.0 Multimedia controller [0480]: Philips Semiconductors 
SAA7133/SAA7135 Video Broadcast Decoder [1131:7133] (rev d1)
        Subsystem: Avermedia Technologies Inc Unknown device [1461:a7a1]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 64 (63750ns min, 63750ns max)
        Interrupt: pin A routed to IRQ 23
        Region 0: Memory at f7ffa800 (32-bit, non-prefetchable) [size=2K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=3 PME-
        Kernel driver in use: saa7134
        Kernel modules: saa7134

If you need anything else just let me know.
Regards,
  Eduard

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