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media: mxl58x, si2183, si2168: Limit CNR legacy value.

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This commit is contained in:
CrazyCat
2024-10-23 20:14:31 +03:00
parent 48d0098707
commit dd0e720e52
3 changed files with 15 additions and 5 deletions
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2
drivers/media/dvb-frontends/mxl58x.c
View File

@@ -532,6 +532,8 @@ static int read_status(struct dvb_frontend *fe, enum fe_status *status)
p->cnr.stat[0].svalue = (s16)reg[0] * 10;
p->cnr.stat[1].scale = FE_SCALE_RELATIVE;
p->cnr.stat[1].uvalue = reg[0] * 33;
if (p->cnr.stat[1].uvalue > 0xffff)
p->cnr.stat[1].uvalue = 0xffff;
/* Read BER */
mutex_lock(&state->base->status_lock);

2
drivers/media/dvb-frontends/si2168.c
View File

@@ -169,6 +169,8 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
c->cnr.stat[0].svalue = (s64)cmd.args[3] * 250;
c->cnr.stat[1].scale = FE_SCALE_RELATIVE;
c->cnr.stat[1].uvalue = (s64)cmd.args[3] * 328;
if (c->cnr.stat[1].uvalue > 0xffff)
c->cnr.stat[1].uvalue = 0xffff;
} else {
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

16
drivers/media/dvb-frontends/si2183.c
View File

@@ -315,7 +315,10 @@ static int si2183_read_status(struct dvb_frontend *fe, enum fe_status *status)
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = (s64) cmd.args[3] * 250;
c->cnr.stat[1].scale = FE_SCALE_RELATIVE;
c->cnr.stat[1].svalue = dev->snr;
c->cnr.stat[1].uvalue = dev->snr;
if (c->cnr.stat[1].uvalue > 0xffff)
c->cnr.stat[1].uvalue = 0xffff;
// writing missing properties
// CONSTELLATION or modulation
@@ -555,10 +558,13 @@ err:
static int si2183_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct i2c_client *client = fe->demodulator_priv;
struct si2183_dev *dev = i2c_get_clientdata(client);
*snr = (dev->fe_status & FE_HAS_LOCK) ? dev->snr : 0;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int i;
*snr = 0;
for (i=0; i < c->cnr.len; i++)
if (c->cnr.stat[i].scale == FE_SCALE_RELATIVE)
*snr = (u16)c->cnr.stat[i].uvalue;
return 0;
}