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authorDaniel Scheller <d.scheller@gmx.net>2017-06-25 08:26:45 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-06-25 09:10:44 -0300
commit006fe8ee884a70f8014034fe67a8ea70c4bdbcac (patch)
tree158b56e12c656fe4e56acddc3f6a5b4064721918 /drivers/media
parent87b467107438423b4dcbcece7ec1bced57992b25 (diff)
downloadop-kernel-dev-006fe8ee884a70f8014034fe67a8ea70c4bdbcac.zip
op-kernel-dev-006fe8ee884a70f8014034fe67a8ea70c4bdbcac.tar.gz
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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/dvb-frontends/stv0367.c21
1 files changed, 21 insertions, 0 deletions
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);
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