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| author | Daniel Scheller <d.scheller@gmx.net> | 2018-06-23 18:36:06 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-07-30 23:23:12 +0300 |
| commit | 3c7d591121c3f5cb97abb9c5dd2a9c2bd8532674 (patch) | |
| tree | bf1530e171ae15b8d75443fecaf665b7ec1cf67d /drivers/media/pci | |
| parent | 3addf0fa820b3da34e0c0e532167afcee8089a3b (diff) | |
| download | linux-3c7d591121c3f5cb97abb9c5dd2a9c2bd8532674.tar.xz | |
media: ddbridge/mci: read and report signal strength and SNR
Implement querying signal statistics from the MCI and report this data
in read_status() as DVBv5 statistics.
Picked up from the upstream dddvb GIT.
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/pci')
| -rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-mci.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-mci.c b/drivers/media/pci/ddbridge/ddbridge-mci.c index 46b20b06e2a6..7d402861fa9e 100644 --- a/drivers/media/pci/ddbridge/ddbridge-mci.c +++ b/drivers/media/pci/ddbridge/ddbridge-mci.c @@ -155,6 +155,47 @@ static void release(struct dvb_frontend *fe) kfree(state); } +static int get_info(struct dvb_frontend *fe) +{ + int stat; + struct mci *state = fe->demodulator_priv; + struct mci_command cmd; + + memset(&cmd, 0, sizeof(cmd)); + cmd.command = MCI_CMD_GETSIGNALINFO; + cmd.demod = state->demod; + stat = mci_cmd(state, &cmd, &state->signal_info); + return stat; +} + +static int get_snr(struct dvb_frontend *fe) +{ + struct mci *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + + p->cnr.len = 1; + p->cnr.stat[0].scale = FE_SCALE_DECIBEL; + p->cnr.stat[0].svalue = + (s64)state->signal_info.dvbs2_signal_info.signal_to_noise + * 10; + return 0; +} + +static int get_strength(struct dvb_frontend *fe) +{ + struct mci *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + s32 str; + + str = 100000 - + (state->signal_info.dvbs2_signal_info.channel_power + * 10 + 108750); + p->strength.len = 1; + p->strength.stat[0].scale = FE_SCALE_DECIBEL; + p->strength.stat[0].svalue = str; + return 0; +} + static int read_status(struct dvb_frontend *fe, enum fe_status *status) { int stat; @@ -168,10 +209,14 @@ static int read_status(struct dvb_frontend *fe, enum fe_status *status) if (stat) return stat; *status = 0x00; + get_info(fe); + get_strength(fe); if (res.status == SX8_DEMOD_WAIT_MATYPE) *status = 0x0f; - if (res.status == SX8_DEMOD_LOCKED) + if (res.status == SX8_DEMOD_LOCKED) { *status = 0x1f; + get_snr(fe); + } return stat; } |