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media: si2165: add DVBv3 wrapper for C/N statistics

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Add read_snr function that reads from property cache to support DVBv3.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Matthias Schwarzott 2017-11-05 09:25:09 -05:00 committed by Mauro Carvalho Chehab
parent 964b372740
commit 2e687a6d3d
1 changed files with 12 additions and 0 deletions
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12
drivers/media/dvb-frontends/si2165.c
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@ -794,6 +794,17 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status)
return 0;
}
static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
*snr = div_s64(c->cnr.stat[0].svalue, 100);
else
*snr = 0;
return 0;
}
static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
{
u64 oversamp;
@ -1111,6 +1122,7 @@ static const struct dvb_frontend_ops si2165_ops = {
.set_frontend = si2165_set_frontend,
.read_status = si2165_read_status,
.read_snr = si2165_read_snr,
};
static int si2165_probe(struct i2c_client *client,