From 006fe8ee884a70f8014034fe67a8ea70c4bdbcac Mon Sep 17 00:00:00 2001 From: Daniel Scheller Date: Sun, 25 Jun 2017 08:26:45 -0300 Subject: [PATCH] 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/stv0367.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/media/dvb-frontends/stv0367.c b/drivers/media/dvb-frontends/stv0367.c index 1983c87..fab9434 100644 --- a/drivers/media/dvb-frontends/stv0367.c +++ b/drivers/media/dvb-frontends/stv0367.c @@ -2998,6 +2998,25 @@ static int stv0367ddb_set_frontend(struct dvb_frontend *fe) return -EINVAL; } +static void stv0367ddb_read_signal_strength(struct dvb_frontend *fe) +{ + struct stv0367_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + s32 signalstrength; + + switch (state->activedemod) { + case demod_cab: + signalstrength = stv0367cab_get_rf_lvl(state) * 1000; + break; + default: + p->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + return; + } + + p->strength.stat[0].scale = FE_SCALE_DECIBEL; + p->strength.stat[0].uvalue = signalstrength; +} + static void stv0367ddb_read_snr(struct dvb_frontend *fe) { struct stv0367_state *state = fe->demodulator_priv; @@ -3075,6 +3094,8 @@ static int stv0367ddb_read_status(struct dvb_frontend *fe, if (ret) return ret; + stv0367ddb_read_signal_strength(fe); + /* read carrier/noise when a carrier is detected */ if (*status & FE_HAS_CARRIER) stv0367ddb_read_snr(fe); -- 2.7.4