STV0299 has bogus CAN_INVERSION_AUTO flag

from gdb dump:
[...]

info = {
      name = "ST STV0299 DVB-S", '\000' <repeats 111 times>, type = FE_QPSK, 
      frequency_min = 950000, frequency_max = 2150000, 
      frequency_stepsize = 125, frequency_tolerance = 0, 
      symbol_rate_min = 1000000, symbol_rate_max = 45000000, 
      symbol_rate_tolerance = 500, notifier_delay = 0, 
      caps = (FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | FE_CAN_QPSK)}, 

[...]

when tuning:
[...]

[331012.238617] stv0299 does not support auto-inversion
[331012.538760] stv0299 does not support auto-inversion
[331012.838898] stv0299 does not support auto-inversion
[331014.192121] stv0299 does not support auto-inversion
[331014.492257] stv0299 does not support auto-inversion
[331014.792391] stv0299 does not support auto-inversion
[331015.092571] stv0299 does not support auto-inversion
[331015.392692] stv0299 does not support auto-inversion
[331015.692825] stv0299 does not support auto-inversion
[331015.992964] stv0299 does not support auto-inversion
[331016.293106] stv0299 does not support auto-inversion
[331019.306883] stv0299 does not support auto-inversion
[331019.607024] stv0299 does not support auto-inversion
[331019.907166] stv0299 does not support auto-inversion
[331020.207352] stv0299 does not support auto-inversion
[331020.507480] stv0299 does not support auto-inversion
[331020.807610] stv0299 does not support auto-inversion
[331021.107747] stv0299 does not support auto-inversion

[...]
(but how the heck should I know?)

kernel:
[...]
uname -a
Linux tivi 4.1.0-1-586 #1 Debian 4.1.3-1 (2015-08-03) i686 GNU/Linux [...]

hardware[boot msg]:
[...]

[   12.785499] saa7146: register extension 'budget_av'
[   12.786359] saa7146: found saa7146 @ mem cf83e000 (revision 1, irq 10) (0x153b,0x1154)
[   12.786472] saa7146 (0): dma buffer size 192512
[   12.786533] DVB: registering new adapter (TerraTec Cinergy 1200 DVB-S)
[   12.828641] adapter failed MAC signature check
[   12.828721] encoded MAC from EEPROM was ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff
[   13.096516] budget_av: KNC1-0: MAC addr = 00:0a:ac:01:8d:a1
[   13.604381] budget_av 0000:00:14.0: DVB: registering adapter 0 frontend 0 (ST STV0299 DVB-S)...
[   13.621283] budget_av: ci interface initialised

[...]

Pls fix this!!!

Either by fixing.
<https://github.com/torvalds/linux/blob/master/drivers/media/dvb-frontends/stv0299.c> around line 583.

or
<https://github.com/torvalds/linux/blob/master/drivers/media/dvb-core/dvb_frontend.c> line 2319

but there it's problematic coz they tried to be `smart' with this in the tuning functions...

And don't start nagging around that I'm supposed to use the `unlimited' capabilities API, coz IT IS NOT IMPLEMENTED AND I AM NOT GONNA WRITE IT.

<https://github.com/torvalds/linux/search?utf8=%E2%9C%93&q=DTV_FE_CAPABILITY>

peace

It breaks tuning, you know.
IT BREAKS TUNING.

Hi
..

I am using the stv0299 with no problems at all, the code hasn't changed much in years. I am using linux 4.2-rc6

You shouldn't be getting that message as dvb core does the auto inversion for the driver.

I looked through the code and can't find any fault.

Regards

Malcolm

Something must have changed. I updated kernel and got those messages. I did not get then before. The vmlinuz.old
points to: boot/vmlinuz-3.14.15
vmlinuz points to: boot/vmlinuz-4.1.0-1-586
(debian testing binary .deb)

It may have been exposed by trying oneshot tuning mode... not sure...
I had to try that 'coz I only got about 50% success on any tuning attempt on this card (has always been like that).
got rid of that, it tunes reliably now if I set INVERSION to 0.
and retry a few times instead of uning once, then polling for LOCK (which often won't happen).
It's entirely possible the bug was in there for a while.

They explicitly set the CAN_INVERSION_AUTO flag in the FE_GET_INFO ioctl, then fail -EINVAL when you try to tune with INVERSION_AUTO. At least that's where the error message comes from.

Yes, it is with setting oneshot.

Looks like the FE_CAN_INVERSION_AUTO flag is only bogus in FE_TUNE_MODE_ONESHOT mode.

Obversely don't set INVERSION_AUTO bearing in mind when you do it manually you have to tune first with it off and if that fails again with it on.

Regards

Malcolm