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| author | Matthias Schwarzott <zzam@gentoo.org> | 2017-11-05 09:25:10 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-12-12 05:52:59 -0500 |
| commit | e9c7d19a3894554c4ebb14513e4da6eb89b91a6a (patch) | |
| tree | aba49cb6e309ab8a4cdab35d30035d33888bd0be /drivers/media/dvb-frontends/si2165.c | |
| parent | 2e687a6d3da813dea908e55bef325526ce644fea (diff) | |
| download | linux-e9c7d19a3894554c4ebb14513e4da6eb89b91a6a.tar.bz2 | |
media: si2165: Add DVBv3 wrapper for ber statistics
Add read_ber function that reads from property cache to support DVBv3.
The implementation is inspired by the cx24120 driver.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends/si2165.c')
| -rw-r--r-- | drivers/media/dvb-frontends/si2165.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c index ceb5a2bb0dea..2ad6409dd6b1 100644 --- a/drivers/media/dvb-frontends/si2165.c +++ b/drivers/media/dvb-frontends/si2165.c @@ -57,6 +57,9 @@ struct si2165_state { u32 sys_clk; u32 adc_clk; + /* DVBv3 stats */ + u64 ber_prev; + bool has_dvbc; bool has_dvbt; bool firmware_loaded; @@ -757,6 +760,12 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status) c->post_bit_error.stat[0].uvalue = 0; c->post_bit_count.stat[0].uvalue = 0; + /* + * reset DVBv3 value to deliver a good result + * for the first call + */ + state->ber_prev = 0; + } else { ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp); if (ret < 0) @@ -805,6 +814,22 @@ static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr) return 0; } +static int si2165_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct si2165_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) { + *ber = 0; + return 0; + } + + *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev; + state->ber_prev = c->post_bit_error.stat[0].uvalue; + + return 0; +} + static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate) { u64 oversamp; @@ -1123,6 +1148,7 @@ static const struct dvb_frontend_ops si2165_ops = { .set_frontend = si2165_set_frontend, .read_status = si2165_read_status, .read_snr = si2165_read_snr, + .read_ber = si2165_read_ber, }; static int si2165_probe(struct i2c_client *client, |