V4L/DVB (13337): Change str snr scale for stv0900/903 and Netup Dual DVB-S2 card.
Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/stv0900_core.c b/drivers/media/dvb/frontends/stv0900_core.c
index c8c72f5..11dbe94 100644
--- a/drivers/media/dvb/frontends/stv0900_core.c
+++ b/drivers/media/dvb/frontends/stv0900_core.c
@@ -599,6 +599,8 @@
break;
}
+ dprintk("%s: AGC Gain = 0x%x\n", __func__, agc_gain);
+
imin = 0;
imax = lookup->size - 1;
if (INRANGE(lookup->table[imin].regval, agc_gain, lookup->table[imax].regval)) {
@@ -634,7 +636,14 @@
s32 rflevel = stv0900_get_rf_level(internal, &stv0900_rf,
state->demod);
- *strength = (rflevel + 100) * (16383 / 105);
+ rflevel = (rflevel + 100) * (65535 / 70);
+ if (rflevel < 0)
+ rflevel = 0;
+
+ if (rflevel > 65535)
+ rflevel = 65535;
+
+ *strength = rflevel;
return 0;
}
@@ -709,6 +718,8 @@
}
}
+ dprintk("%s: Quality = %d\n", __func__, c_n);
+
return c_n;
}
@@ -752,10 +763,16 @@
static int stv0900_read_snr(struct dvb_frontend *fe, u16 *snr)
{
- *snr = stv0900_carr_get_quality(fe,
+ s32 snrlcl = stv0900_carr_get_quality(fe,
(const struct stv0900_table *)&stv0900_s2_cn);
- *snr += 30;
- *snr *= (16383 / 1030);
+ snrlcl = (snrlcl + 30) * 384;
+ if (snrlcl < 0)
+ snrlcl = 0;
+
+ if (snrlcl > 65535)
+ snrlcl = 65535;
+
+ *snr = snrlcl;
return 0;
}