[linux-dvb] HowTo for new tuner

MikeW mw_phil at yahoo.co.uk
Tue Aug 7 11:41:26 CEST 2007


Michael Krufky <mkrufky <at> linuxtv.org> writes:

> Mike,
> 
> I have already written a completely functional driver for the
 TDA18271 silicon.
>  DVB-T has not yet been tested on it, but I doubt it will be any problem.
 I
> understand that you are working with the TDA18211 -- do you know
 how similar it
> is to the 18271?  I haven't google'd the 18211 yet, but I'll take a look.
> 
> I am currently working to refactor the tuning api between the dvb and v4l
> subsystems -- this is my reasoning for not having released my tda18271 code
> publicly, as of yet.  It does work, however, and I have only tested it so far
> using analog broadcasts.  The difference for tuning DVB-T is only some small
> changes to certain registers.
> 
> Based on what I see in the pdf that you linked above, I
 wouldn't be surprised if
> the tda18211 featureset is merely a small subset of the tda18271, meant
> specifically for DVB-T.
> 
> How much progress have you already made with your driver?
> 
> I'd be happy to help you if you have any further questions... If the 18211 is
> indeed program compatible with the 18271, except for the limited featureset,
> then I'd hate to see somebody do double-work.
> 
> Regards,
> 
> Michael Krufky
> 

You are right - the devices are compatible except for the featureset
restriction; I believe the IF_notch bit is also omitted.

I look forward to giving your 18271 driver a spin when it becomes
available.

Regards,
MikeW





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