media: dvb-frontends/stv0367: DVB-C signal strength statistics
Provide QAM/DVB-C signal strength in decibel scale. Values returned from stv0367cab_get_rf_lvl() are good but need to be multiplied as they're in 1dBm precision. Signed-off-by: Daniel Scheller <d.scheller@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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87b4671074
Коммит
006fe8ee88
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@ -2998,6 +2998,25 @@ static int stv0367ddb_set_frontend(struct dvb_frontend *fe)
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return -EINVAL;
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}
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static void stv0367ddb_read_signal_strength(struct dvb_frontend *fe)
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{
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struct stv0367_state *state = fe->demodulator_priv;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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s32 signalstrength;
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switch (state->activedemod) {
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case demod_cab:
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signalstrength = stv0367cab_get_rf_lvl(state) * 1000;
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break;
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default:
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p->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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return;
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}
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p->strength.stat[0].scale = FE_SCALE_DECIBEL;
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p->strength.stat[0].uvalue = signalstrength;
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}
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static void stv0367ddb_read_snr(struct dvb_frontend *fe)
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{
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struct stv0367_state *state = fe->demodulator_priv;
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@ -3075,6 +3094,8 @@ static int stv0367ddb_read_status(struct dvb_frontend *fe,
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if (ret)
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return ret;
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stv0367ddb_read_signal_strength(fe);
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/* read carrier/noise when a carrier is detected */
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if (*status & FE_HAS_CARRIER)
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stv0367ddb_read_snr(fe);
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