diff options
| author | Reinhard Nißl <rnissl@gmx.de> | 2013-06-02 19:59:00 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-06-09 01:14:17 +0200 |
| commit | 0c1d2b14d09b862ccd6300d774eb579161635710 (patch) | |
| tree | ca80497dfd440f79d65a9a5c45e5d744f82ee581 /drivers/media/dvb-frontends/stb0899_algo.c | |
| parent | [media] stb0899: allow minimum symbol rate of 2000000 (diff) | |
| download | linux-0c1d2b14d09b862ccd6300d774eb579161635710.tar.xz linux-0c1d2b14d09b862ccd6300d774eb579161635710.zip | |
[media] stb0899: store successful inversion for next run
Usually, inversion doesn't change in a system. Storing the last
successful inversion value speeds up tuning of DVB-S2 transponders.
Signed-off-by: Reinhard Nißl <rnissl@gmx.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb-frontends/stb0899_algo.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stb0899_algo.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/stb0899_algo.c b/drivers/media/dvb-frontends/stb0899_algo.c index e0d31a2ea578..4b49efb67931 100644 --- a/drivers/media/dvb-frontends/stb0899_algo.c +++ b/drivers/media/dvb-frontends/stb0899_algo.c @@ -1488,9 +1488,15 @@ enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state) offsetfreq = offsetfreq / ((1 << 30) / 1000); offsetfreq *= (internal->master_clk / 1000000); + + /* store current inversion for next run */ reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2); if (STB0899_GETFIELD(SPECTRUM_INVERT, reg)) - offsetfreq *= -1; + internal->inversion = IQ_SWAP_ON; + else + internal->inversion = IQ_SWAP_OFF; + + offsetfreq *= internal->inversion; internal->freq = internal->freq - offsetfreq; internal->srate = stb0899_dvbs2_get_srate(state); |