diff options
| author |   Antti Palosaari <crope@iki.fi> | 2014-12-14 11:00:50 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-02-03 16:07:43 -0200 |
| commit | 25ef9f554713bc329523b615861db7cbc443106a (patch) | |
| tree | 12170d3ab23423c6fe172fe730403a7053c24df8 /drivers/media/dvb-frontends | |
| parent | [media] rtl2832: wrap DVBv5 BER to DVBv3 (diff) | |
| download | linux-dev-25ef9f554713bc329523b615861db7cbc443106a.tar.xz linux-dev-25ef9f554713bc329523b615861db7cbc443106a.zip | |
[media] rtl2832: implement DVBv5 signal strength statistics
Estimate signal strength from IF digital AGC.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/dvb-frontends')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index 90d4f45d9958..6aaaec2a40c2 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -474,6 +474,8 @@ static int rtl2832_init(struct dvb_frontend *fe) goto err; #endif /* init stats here in order signal app which stats are supported */ + c->strength.len = 1; + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; c->cnr.len = 1; c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; c->post_bit_error.len = 1; @@ -823,6 +825,24 @@ static void rtl2832_stat_work(struct work_struct *work) dev_dbg(&client->dev, "\n"); + /* signal strength */ + if (dev->fe_status & FE_HAS_SIGNAL) { + /* read digital AGC */ + ret = rtl2832_bulk_read(client, 0x305, &u8tmp, 1); + if (ret) + goto err; + + dev_dbg(&client->dev, "digital agc=%02x", u8tmp); + + u8tmp = ~u8tmp; + u16tmp = u8tmp << 8 | u8tmp << 0; + + c->strength.stat[0].scale = FE_SCALE_RELATIVE; + c->strength.stat[0].uvalue = u16tmp; + } else { + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + /* CNR */ if (dev->fe_status & FE_HAS_VITERBI) { unsigned hierarchy, constellation; |