diff options
| author | Antti Palosaari <crope@iki.fi> | 2017-06-21 11:02:42 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-21 14:03:57 -0400 |
| commit | 7903fbe3a636dbee04e5623931013feb80aab817 (patch) | |
| tree | 836d09d0f1133b144ee2f6063e2be208cf28d686 /drivers/media/dvb-frontends/af9013.c | |
| parent | 35ecf2b4d24adf944b1cdce4941b3e82d0713111 (diff) | |
| download | linux-7903fbe3a636dbee04e5623931013feb80aab817.tar.bz2 | |
media: af9013: change lock detection slightly
Whilst rewritten largely, the basic logic remains same with one
exception: do not return immediately on success case. We are going to
add statistics that function and cannot return too early.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends/af9013.c')
| -rw-r--r-- | drivers/media/dvb-frontends/af9013.c | 55 |
1 files changed, 27 insertions, 28 deletions
diff --git a/drivers/media/dvb-frontends/af9013.c b/drivers/media/dvb-frontends/af9013.c index b8f3ebfc3e27..30cf837058da 100644 --- a/drivers/media/dvb-frontends/af9013.c +++ b/drivers/media/dvb-frontends/af9013.c @@ -752,45 +752,44 @@ static int af9013_read_status(struct dvb_frontend *fe, enum fe_status *status) struct af9013_state *state = fe->demodulator_priv; struct i2c_client *client = state->client; int ret; - unsigned int utmp; + unsigned int utmp, utmp1; /* * Return status from the cache if it is younger than 2000ms with the * exception of last tune is done during 4000ms. */ - if (time_is_after_jiffies( - state->read_status_jiffies + msecs_to_jiffies(2000)) && - time_is_before_jiffies( - state->set_frontend_jiffies + msecs_to_jiffies(4000)) - ) { - *status = state->fe_status; - return 0; + if (time_is_after_jiffies(state->read_status_jiffies + msecs_to_jiffies(2000)) && + time_is_before_jiffies(state->set_frontend_jiffies + msecs_to_jiffies(4000))) { + *status = state->fe_status; } else { - *status = 0; - } + /* MPEG2 lock */ + ret = regmap_read(state->regmap, 0xd507, &utmp); + if (ret) + goto err; - /* MPEG2 lock */ - ret = regmap_read(state->regmap, 0xd507, &utmp); - if (ret) - goto err; + if ((utmp >> 6) & 0x01) { + utmp1 = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; + } else { + /* TPS lock */ + ret = regmap_read(state->regmap, 0xd330, &utmp); + if (ret) + goto err; - if ((utmp >> 6) & 0x01) - *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | - FE_HAS_SYNC | FE_HAS_LOCK; + if ((utmp >> 3) & 0x01) + utmp1 = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI; + else + utmp1 = 0; + } - if (!*status) { - /* TPS lock */ - ret = regmap_read(state->regmap, 0xd330, &utmp); - if (ret) - goto err; + dev_dbg(&client->dev, "fe_status %02x\n", utmp1); - if ((utmp >> 3) & 0x01) - *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI; - } + state->read_status_jiffies = jiffies; - state->fe_status = *status; - state->read_status_jiffies = jiffies; + state->fe_status = utmp1; + *status = utmp1; + } return 0; err: |