Commit 226143f9 authored by Reinhard Nissl's avatar Reinhard Nissl Committed by Mauro Carvalho Chehab

[media] stb0899: return internally tuned frequency via get_frontend.

Am 14.08.2012 14:05, schrieb Manu Abraham:
>> My other device, a STB0899, always reports the set frequency. So it seems
>> driver dependent whether it reports the actually locked frequency found by
>> the zig-zag-algorithm or just the set frequency to tune to.
>
> The STV0299 blindly sets the value based on a software zigzag (due to simpler
> hardware), but this might not be accurate enough. On the other hand, the
> STB0899 internally does zig-zag in hardware for DVB-S2, and partly in
> software for DVB-S.
>
> In any event, the get_frontend callback should return the value that is read
> from the demodulator registers, rather than the cached original value that
> which was requested to be tuned.
>
> The stb0899 returns only the cached value IIRC. Maybe I will fix this soon,
> or maybe you can send a patch.
This is what I get after the patch:

Sat.    Pol.    Band    Freq (MHz) Set    Freq (MHz) Get    Delta (MHz)
S19,2E    H     L       10744             10748,474         4,474
S19,2E    H     L       10773             10777,944         4,944
S19,2E    H     L       10832             10836,953         4,953
S19,2E    H     L       10861             10868,774         7,774
...
Signed-off-by: default avatarReinhard Nißl <rnissl@gmx.de>
Cc: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 3c813947
......@@ -1563,6 +1563,7 @@ static int stb0899_get_frontend(struct dvb_frontend *fe)
dprintk(state->verbose, FE_DEBUG, 1, "Get params");
p->symbol_rate = internal->srate;
p->frequency = internal->freq;
return 0;
}
......
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