[linux-dvb] Re: [PATCH] Improve behaviour of scan app when settingfrontend params

[Holger Waechtler <holger@convergence.de>]

Jon Burgess wrote:
> I have attached two small patches to the scan application, the first 
> (scan-check-fe.diff) adds a check to report an error if there was a 
> problem setting the frontend parameters.
>
> The second patch (scan-fallback.diff) queries the frontend capabilities 
> before trying to use "INVERSION_AUTO". I agree that this might not be 
> the best place to do this, but it works for me.
thanks, applied. Basically you have to retry with INVERSION_ON if tuning 
failed...

> It looks like a good place to add the software auto-inversion might be 
> in the generic dvb-frontend code, thereby allowing it to be used by any 
> tuner which doesn't have the hardware suport feature. I'll take a look 
> when I get some more time.
I'm not sure about this. For the inversion setting this approach works 
well, but would basically we need something similiar for all _AUTO 
parameters if we want to provide a consistent API...

And probing all parameters can get pretty expensive.

Holger




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