diff options
author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-09-12 21:50:34 +0300 |
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committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-09-14 16:49:08 +0300 |
commit | f3ea9da24bc98cbeff84a3bf54ed4072a0f3774e (patch) | |
tree | b718c6823c0112952f53475711ad7f087727ee42 /drivers/media/test-drivers/vidtv/vidtv_tuner.c | |
parent | 870e350d4e3927d9425d27ba37a4344e99a105c2 (diff) | |
download | linux-f3ea9da24bc98cbeff84a3bf54ed4072a0f3774e.tar.xz |
media: vidtv: fix frequency tuning logic
Right now, there are some issues at the tuning logic:
1) the config struct is not copied at the tuner driver.
so, it won't use any frequency table at all;
2) the code that checks for frequency shifts is called
at set_params. So, lock_status will never be zeroed;
3) the signal strength will also report a strong
signal, even if not tuned;
4) the logic is not excluding non-set frequencies.
Fix those issues.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/test-drivers/vidtv/vidtv_tuner.c')
-rw-r--r-- | drivers/media/test-drivers/vidtv/vidtv_tuner.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/media/test-drivers/vidtv/vidtv_tuner.c b/drivers/media/test-drivers/vidtv/vidtv_tuner.c index 39e848ae5836..13ce0a3ef43c 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_tuner.c +++ b/drivers/media/test-drivers/vidtv/vidtv_tuner.c @@ -120,7 +120,7 @@ vidtv_tuner_get_dev(struct dvb_frontend *fe) return i2c_get_clientdata(fe->tuner_priv); } -static s32 vidtv_tuner_check_frequency_shift(struct dvb_frontend *fe) +static int vidtv_tuner_check_frequency_shift(struct dvb_frontend *fe) { struct vidtv_tuner_dev *tuner_dev = vidtv_tuner_get_dev(fe); struct dtv_frontend_properties *c = &fe->dtv_property_cache; @@ -156,6 +156,8 @@ static s32 vidtv_tuner_check_frequency_shift(struct dvb_frontend *fe) } for (i = 0; i < array_sz; i++) { + if (!valid_freqs[i]) + break; shift = abs(c->frequency - valid_freqs[i]); if (!shift) @@ -177,6 +179,7 @@ static int vidtv_tuner_get_signal_strength(struct dvb_frontend *fe, u16 *strength) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct vidtv_tuner_dev *tuner_dev = vidtv_tuner_get_dev(fe); const struct vidtv_tuner_cnr_to_qual_s *cnr2qual = NULL; struct device *dev = fe->dvb->device; u32 array_size = 0; @@ -184,6 +187,11 @@ vidtv_tuner_get_signal_strength(struct dvb_frontend *fe, u16 *strength) u32 i; shift = vidtv_tuner_check_frequency_shift(fe); + if (shift < 0) { + tuner_dev->hw_state.lock_status = 0; + *strength = 0; + return 0; + } switch (c->delivery_system) { case SYS_DVBT: @@ -224,10 +232,6 @@ vidtv_tuner_get_signal_strength(struct dvb_frontend *fe, u16 *strength) *strength = cnr2qual[i].cnr_good; return 0; } - if (shift < 0) { /* Channel not tuned */ - *strength = 0; - return 0; - } /* * Channel tuned at wrong frequency. Simulate that the * Carrier S/N ratio is not too good. @@ -288,6 +292,7 @@ static int vidtv_tuner_set_params(struct dvb_frontend *fe) struct vidtv_tuner_dev *tuner_dev = vidtv_tuner_get_dev(fe); struct vidtv_tuner_config config = tuner_dev->config; struct dtv_frontend_properties *c = &fe->dtv_property_cache; + s32 shift; u32 min_freq = fe->ops.tuner_ops.info.frequency_min_hz; u32 max_freq = fe->ops.tuner_ops.info.frequency_max_hz; @@ -305,6 +310,13 @@ static int vidtv_tuner_set_params(struct dvb_frontend *fe) tuner_dev->hw_state.lock_status = TUNER_STATUS_LOCKED; msleep_interruptible(config.mock_tune_delay_msec); + + shift = vidtv_tuner_check_frequency_shift(fe); + if (shift < 0) { + tuner_dev->hw_state.lock_status = 0; + return shift; + } + return 0; } @@ -395,6 +407,7 @@ static int vidtv_tuner_i2c_probe(struct i2c_client *client, &vidtv_tuner_ops, sizeof(struct dvb_tuner_ops)); + memcpy(&tuner_dev->config, config, sizeof(tuner_dev->config)); fe->tuner_priv = client; return 0; |