Changeset 8f3741e0 accidentally broke the CNR estimation. It should
be calculated as "a + b - c". However, previously, the subtraction
by c only occurred if SNR would be positive, due to a bad binding
to DVBv3 API.

This also fixes the following warning:
	drivers/media/dvb-frontends/drxk_hard.c:2556:6: warning: variable 'c' set but not used [-Wunused-but-set-variable]
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Use register address auto increment to reduce I/O when large
register / values tables are written.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

That register is property of demodulator so move it correct place.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Those are demodulator init tables according to used tuner tuner
config. af9033 demod driver does those inits currently and due
to that these duplicate inits could be removed.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from the Windows driver version 12.07.06.1
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Dumped out from Windows driver version 12.07.06.1, 07/06/2012.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add support for tuners integrated to the IT9135 and IT9137.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The Kconfig entry for "TS2020 based tuners" defaults to modular if
DVB_FE_CUSTOMISE is set. But that Kconfig symbol was replaced with
MEDIA_SUBDRV_AUTOSELECT as of v3.7. So use the new symbol. And negate
the logic, so we are in line with all the similar entries in this file.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The DVBv3 signal strength indicator is bogus: it doesn't range
from 0 to 65535 as it would be expected. Also, 0 means the max
signal strength.
Now that a better way to estimate it was added, use the new
way.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The AZ6007 driver released by Terratec has a better way to
estimate the signal strength, at CtrlSigStrength(). Port it
to the driver.
It should be noticed that there are two parameters there that
are tuner-specific.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The original az6007 driver has the code to calculate such
stats. Add it to the driver, reporting them via DVBv5
stats API.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The BER code does nothing but filling it with zero. Remove it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

goto err and goto err_gateoff before mutex_lock(&state->internal->demod_lock)
lead to unlock of unheld mutex in stv090x_sleep().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that some devices initialize register 0x2a with different
values, add the calculus formula, instead of hardcoding it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Up to now, the driver was simply assuming TV mode, 13 segs.
Implement the logic to control the ISDB operational mode.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As the device got re-initialized, the stats should vanish
until the device gets lock again.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signal strength is always available. There's no reason to reset
it, as it has its own logic to reset it already.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Always init the frontend when set_frontend is called. The rationale
is: it was noticed that, on some devices, it fails to lock with a
different channel. It seems that some other registers need to be
restored to its initial state, when the channel changes.
As it is better to reset everything, even wasting a few more
miliseconds than to loose channel lock, let's change the logic
to always reset.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Use the AGC settings present on a newer device.
The initial settings were taken from one of the first devices with
mb86a20s, and there are several reports that this is not working
properly on some places.
So, instead of keeping using it, get the parameters taken from a
newer device. Tests are welcomed.
Tested also with cx231xx PixelView SBTVD Hybrid with no regressions
noticed so far.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Getting signal strength requires some loop poking with I2C.
Don't let it happen too fast.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A register typo made the calculation to not work. Fix it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

State 9 means TS started to be output, and it should be
associated with FE_HAS_SYNC.
The mb86a20scan get CNR statistics at state 7, when frame sync
is obtained.
As CNR may help to adjust the antenna, provide it earlier.
A latter patch could eventually start outputing MER measures
earlier, but that would require a bigger change, and probably
won't be better than the current way, as the time between
changing from state 8 to 9 is generally lower than the time
to get the stats collected.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Instead of hardcoding a fixed IF frequency of 3.3 MHz, use
the IF frequency provided by the tuner driver.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

There are a few debug tests that are shown with dev_err() or
dev_info(). Replace them by dev_dbg().
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The address of a variable is impossible to be null, so we remove the check.
Signed-off-by: NCong Ding <dinggnu@gmail.com>
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch introduces the use of IS_ENABLED() macro. For example,
replacing:
 #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
with:
 #if IS_ENABLED(CONFIG_I2C)
All changes made by this patch respect the same replacement pattern.
Reported-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Acked-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Sometimes there is a problem when trying to access the non-existing registers
of the second demodulator path on the STV0903.

This change removes the calls in case the driver is used on a STV0903.
Signed-off-by: NAndreas Regel <andreas.regel@gmx.de>
Acked-by: NManu Abraham <manu@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

If, for any reason, all per-layers counters stop, remove the
corresponding global counter.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The logic here is similar to the preBER.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The logic that resets the device is wrong. It should be resetting
just the layer that got read. Also, stop is needed before updating
the counters.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The logic that resets the device is wrong. It should be resetting
just the layer that got read. Also, stop is needed before updating
the counters.
While there, rename it, as we'll soon introduce a postBER logic
there.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add both per-layer and global block error count and block count,
for PER and UCB measurements.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add Signal/Noise ratio measurement. On this device, a global measure
is taken by the demod. It also provides per-layer CNR measurements,
based on Modulation Error measures (MER).
Reviewed-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>