With Mygica S870, there's a difference of ~10dB to ~13dB when
compared with the current scale.
I suspect that this is because dib8096gp uses a different set of
AGC adjust parameters.
Anyway, better to adjust it, in order to have a more precise measure.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
---
drivers/media/dvb-frontends/dib8000.c | 2 ++
drivers/media/dvb-frontends/dibx000_common.h | 2 ++
drivers/media/usb/dvb-usb/dib0700_devices.c | 2 ++
3 files changed, 6 insertions(+)
diff --git a/drivers/media/dvb-frontends/dib8000.c b/drivers/media/dvb-frontends/dib8000.c
index 3de8934a5b3d..4ecf1a6181cc 100644
--- a/drivers/media/dvb-frontends/dib8000.c
+++ b/drivers/media/dvb-frontends/dib8000.c
@@ -4064,6 +4064,8 @@ static int dib8000_get_stats(struct dvb_frontend *fe, fe_status_t stat)
db = interpolate_value(val,
strength_to_db_table,
ARRAY_SIZE(strength_to_db_table)) - 131000;
+ if (state->current_agc)
+ db += state->current_agc->dbm_adjust;
c->strength.stat[0].svalue = db;
/* UCB/BER/CNR measures require lock */
diff --git a/drivers/media/dvb-frontends/dibx000_common.h b/drivers/media/dvb-frontends/dibx000_common.h
index b538e0555c95..76c9b8e9ed44 100644
--- a/drivers/media/dvb-frontends/dibx000_common.h
+++ b/drivers/media/dvb-frontends/dibx000_common.h
@@ -111,6 +111,8 @@ struct dibx000_agc_config {
u16 min_thres;
u16 max_thres;
} split;
+
+ int dbm_adjust;
};
struct dibx000_bandwidth_config {
diff --git a/drivers/media/usb/dvb-usb/dib0700_devices.c b/drivers/media/usb/dvb-usb/dib0700_devices.c
index 501947eaacfe..baffa8fe09ef 100644
--- a/drivers/media/usb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/usb/dvb-usb/dib0700_devices.c
@@ -1452,6 +1452,8 @@ static struct dibx000_agc_config dib8090_agc_config[2] = {
.beta_exp = 51,
.perform_agc_softsplit = 0,
+
+ .dbm_adjust = 13000, /* Empirical adjust the Signal strength scale */
},
{
.band_caps = BAND_CBAND,
--
1.9.3
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