[mythtv-users] i2c errors (revisited)

Warpme warpme at o2.pl
Mon Jan 9 17:45:44 UTC 2012


On 1/8/12 7:57 PM, Devin Heitmueller wrote:
> On Sun, Jan 8, 2012 at 8:25 AM, Michael T. Dean<mtdean at thirdcontact.com>  wrote:
>> On 01/08/2012 06:24 AM, Keith Edmunds wrote:
>>>    - Tuners: 2 x Hauppauge Nova-T Stick (USB) and 1 x PCTV Nanostick 290e
>>>      (also USB)
>>>
>> Just a wild guess, but do you have EIT enabled on more than one of the
>> cards? I've heard there are problems with some cards where if EIT is
>> used on multiple cards, it causes the driver/device to "break".  (Don't
>> know any details, though.)
> Hi Mike,
>
> Wow, that's pretty disturbing if it's true (I'm saying this with my
> "linux-media driver developer" hat).  I guess devices such as the
> Nova-T 500 could be more susceptible to this sort of bug given a
> single i2c master is shared across two tuners, but you definitely
> shouldn't see this sort of issue between two different cards (with
> different i2c masters).
>
> Any links/background you can point me to on this issue would be helpful.
>
> Regards,
>
> Devin
>
Devin, Keith
Sorry for maybe little off-topic/hijacking thread.
I have dual DVB-T card (Kworld 310PE, saa7162).
I merged
http://powarman.dyndns.org/hgwebdir.cgi/v4l-dvb-saa716x/summary
with current 3.0.x kernel tree.
Card works, but after touching 2nd tuner & short usage I started to have 
I2C errors between saa7162 & tda10046.
Some of them I was able to resolve as it was simple initialization race 
issue.
Unfortunately others I can't resolve due lack of experience in I2C 
implementation in Linux.
Andreas Regel seem to be unavailable (i contacted him 3 times without 
replay).
Is is possible that You will look on 716x driver code ?
I can provide all details via PM.

Thx in advance !

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