Re: DVBSky T980C CI issues (kernel 4.0.x)

[Torbjorn Jansson <torbjorn.jansson@mbox200.swipnet.se>]

i was about to ask how to easiest see what firmware i was running 
without rebooting when i realized i already have it in this mail thread ;)

all of the firmware i'm running is the ones that came from dvbsky 
directly in this file:
http://www.dvbsky.net/download/linux/dvbsky-firmware.tar.gz

i suspect i should go thru all of the firmware files i use since if one 
is bad the other ones is probably also bad.

i assume i also should also check: dvb-tuner-si2158-a20-01.fw
what version is a good one? i have found 2 different files:

the one i current usefrom dvbsky, also same as OpenELEC fw repo uses 
with md5sum:
8e98d25d6219e235b519a3c47dbfa856  dvb-tuner-si2158-a20-01.fw

and then i found another one at 
http://palosaari.fi/linux/v4l-dvb/firmware/Si2158/Si2158-A20/
0cba7ce61c1411cbe7f22c0746e24e33  dvb-tuner-si2158-a20-01.fw
this file is a bit smaller.

i will retest with the new firmware you suggested and see what happens.


On 2016-03-03 12:02, Olli Salonen wrote:
> Hi Jurgen, Torbjörn,
>
> I've noticed that there is currently a small confusion about the
> firmware versions for the Si2168-A20 demodulator. This is used in the
> older versions of DVBSky T680C (TechnoTrend CT2-4650 CI) and DVBSky
> T980C (TechnoTrend CT2-4500 CI).
>
> The version 2.0.5 does not support PLP handling and seems to work very
> badly with the Linux driver - at least for me. Version 2.0.35 on the
> other hand seems to find all DVB-T/T2 channels for me just fine with
> both dvbv5-scan and w_scan (devices used for this test: TechnoTrend
> CT2-4650 CI and TechnoTrend CT2-4500 CI new version).
>
> Versions used:
> dvbv5-scan version 1.7.0
> w_scan version 20150111 (compiled for DVB API 5.10)
>
> So if you are running these Si2168-A20 based devices, make sure you've
> got the firmware 2.0.35 that can be downloaded for example here:
> http://palosaari.fi/linux/v4l-dvb/firmware/Si2168/Si2168-A20/32e06713b33915f674bfb2c209beaea5/
>
> Cheers,
> -olli
>
> On 20 February 2016 at 19:20, Jurgen Kramer <gtmkramer@xs4all.nl> wrote:
>> Hi,
>>
>> On Sat, 2016-02-20 at 16:57 +0100, Torbjorn Jansson wrote:
>>> i have tested your patch with my dvbsky dvb-t2 card.
>>> testing was done by compiling a custom kernel with your patch
>>> included.
>>> test was done against fedora 22 4.3.4-200 kernel
>>>
>>> with the patch included the CI slot is found.
>>> so there is some progress for sure
>>> -----
>>> [   10.189408] cx25840 11-0044: loaded v4l-cx23885-avcore-01.fw
>>> firmware
>>> (16382 bytes)
>>> [   10.206683] cx23885_dvb_register() allocating 1 frontend(s)
>>> [   10.207968] cx23885[0]: cx23885 based dvb card
>>> [   10.224306] i2c i2c-10: Added multiplexed i2c bus 12
>>> [   10.225633] si2168 10-0064: Silicon Labs Si2168 successfully
>>> attached
>>> [   10.243310] si2157 12-0060: Silicon Labs Si2147/2148/2157/2158
>>> successfully attached
>>> [   10.244560] DVB: registering new adapter (cx23885[0])
>>> [   10.245807] cx23885 0000:07:00.0: DVB: registering adapter 0
>>> frontend
>>> 0 (Silicon Labs Si2168)...
>>> [   10.417402] sp2 9-0040: CIMaX SP2 successfully attached
>>> [   10.447120] DVBSky T980C MAC address: 00:17:42:54:09:85
>>> [   10.448844] cx23885_dev_checkrevision() Hardware revision = 0xa5
>>> [   10.450550] cx23885[0]/0: found at 0000:07:00.0, rev: 4, irq: 19,
>>> latency: 0, mmio: 0xf6e00000
>>>
>>> later when tuning:
>>>
>>> [   67.728109] si2168 10-0064: found a 'Silicon Labs Si2168-A20'
>>> [   67.802203] si2168 10-0064: downloading firmware from file
>>> 'dvb-demod-si2168-a20-01.fw'
>>> [   68.968336] si2168 10-0064: firmware version: 2.0.5
>>> [   68.977071] si2157 12-0060: found a 'Silicon Labs Si2158-A20'
>>> [   69.961057] si2157 12-0060: downloading firmware from file
>>> 'dvb-tuner-si2158-a20-01.fw'
>>> [   70.969094] si2157 12-0060: firmware version: 2.1.9
>>> ----
>>>
>>> but using dvbv5-scan to scan it doesn't find any channel.
>>> all i get is this:
>>> ----
>>> Scanning frequency #1 770000000
>>>          (0x00) Signal= -114.00dBm
>>> Scanning frequency #2 754000000
>>>          (0x00) Signal= -27.00dBm C/N= 32.50dB
>>> Scanning frequency #3 546000000
>>>          (0x00) Signal= -25.00dBm C/N= 33.75dB
>>> Scanning frequency #4 650000000
>>>          (0x00) Signal= -18.00dBm C/N= 36.00dB
>>> Scanning frequency #5 522000000
>>>          (0x00) Signal= -28.00dBm C/N= 33.00dB
>>> ----
>>>
>>> so something else is broken too.
>>>
>> I have been using the patches for a few days. So far everything works
>> great (using MythTV). Scanning with dvbv5_scan does indeed not work
>> (never did for me). w_scan works though.
>>
>> Can these patches please be included in the stable kernels ?
>>
>> Jurgen
>>
>>
>>> On 2016-02-16 21:20, Olli Salonen wrote:
>>>> Hi all,
>>>>
>>>> Found the issue and submitted a patch.
>>>>
>>>> The I2C buses for T980C/T2-4500CI were crossed when CI registration
>>>> was moved to its own function.
>>>>
>>>> Cheers,
>>>> -olli
>>>>
>>>> On 31 January 2016 at 10:55, Torbjorn Jansson
>>>> <torbjorn.jansson@mbox200.swipnet.se> wrote:
>>>>> this ci problem is the reason i decided to buy the CT2-4650 usb
>>>>> based device
>>>>> instead.
>>>>> but the 4650 was a slightly newer revision needing a patch i
>>>>> submitted
>>>>> earlier.
>>>>> and also this 4650 device does not have auto switching between
>>>>> dvb-t and t2
>>>>> like the dvbsky card have, so i also need an updated version of
>>>>> mythtv.
>>>>>
>>>>> my long term wish is to not have to patch things or build custom
>>>>> kernels or
>>>>> modules.
>>>>> so anything done to improve the dvbsky card or the 4650 is much
>>>>> appreciated.
>>>>>
>>>>>
>>>>> On 2016-01-28 20:42, Olli Salonen wrote:
>>>>>>
>>>>>> Hi Jürgen & Mauro,
>>>>>>
>>>>>> I did bisect this and it seems this rather big patch broke it:
>>>>>>
>>>>>> 2b0aac3011bc7a9db27791bed4978554263ef079 is the first bad
>>>>>> commit
>>>>>> commit 2b0aac3011bc7a9db27791bed4978554263ef079
>>>>>> Author: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
>>>>>> Date:   Tue Dec 23 13:48:07 2014 -0200
>>>>>>
>>>>>>        [media] cx23885: move CI/MAC registration to a separate
>>>>>> function
>>>>>>
>>>>>>        As reported by smatch:
>>>>>>            drivers/media/pci/cx23885/cx23885-dvb.c:2080
>>>>>> dvb_register()
>>>>>> Function too hairy.  Giving up.
>>>>>>
>>>>>>        This is indeed a too complex function, with lots of stuff
>>>>>> inside.
>>>>>>        Breaking this into two functions makes it a little bit
>>>>>> less hairy.
>>>>>>
>>>>>>        Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung
>>>>>> .com>
>>>>>>
>>>>>> It's getting a bit late, so I'll call it a day now and have a
>>>>>> look at
>>>>>> the patch to see what goes wrong there.
>>>>>>
>>>>>> Cheers,
>>>>>> -olli
>>>>>>
>>>>>> On 28 January 2016 at 20:57, Jurgen Kramer <gtmkramer@xs4all.nl
>>>>>>> wrote:
>>>>>>>
>>>>>>> Hi Olli,
>>>>>>>
>>>>>>> On Thu, 2016-01-28 at 19:26 +0200, Olli Salonen wrote:
>>>>>>>>
>>>>>>>> Hi Jürgen,
>>>>>>>>
>>>>>>>> Did you get anywhere with this?
>>>>>>>>
>>>>>>>> I have a clone of your card and was just starting to look
>>>>>>>> at this
>>>>>>>> issue. Kernel 3.19 seems to work ok, but 4.3 not. Did you
>>>>>>>> have any
>>>>>>>> time to try to pinpoint this more?
>>>>>>>
>>>>>>> No, unfortunately not. I have spend a few hours adding
>>>>>>> printk's but it
>>>>>>> did not get me any closer what causes the issue. This really
>>>>>>> needs
>>>>>>> investigation from someone who is more familiar with linux
>>>>>>> media.
>>>>>>>
>>>>>>> Last thing I tried was the latest (semi open) drivers from
>>>>>>> dvbsky on a
>>>>>>> 4.3 kernel. Here the CI and CAM registered successfully.
>>>>>>>
>>>>>>> Greetings,
>>>>>>> Jurgen
>>>>>>>
>>>>>>>> Cheers,
>>>>>>>> -olli
>>>>>>>>
>>>>>>>> On 12 September 2015 at 10:02, Jurgen Kramer <gtmkramer@xs4
>>>>>>>> all.nl>
>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> On Fri, 2015-09-11 at 22:01 +0200, Torbjorn Jansson
>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>> On 2015-08-23 19:50, Jurgen Kramer wrote:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Sun, 2015-07-12 at 12:38 +0200, Jurgen Kramer
>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> I have been running a couple of DVBSky T980C's with
>>>>>>>>>>>> CIs with
>>>>>>>>>>>> success
>>>>>>>>>>>> using an older kernel (3.17.8) with media-build and
>>>>>>>>>>>> some
>>>>>>>>>>>> added patches
>>>>>>>>>>>> from the mailing list.
>>>>>>>>>>>>
>>>>>>>>>>>> I thought lets try a current 4.0 kernel to see if I
>>>>>>>>>>>> no longer
>>>>>>>>>>>> need to be
>>>>>>>>>>>> running a custom kernel. Everything works just fine
>>>>>>>>>>>> except
>>>>>>>>>>>> the CAM
>>>>>>>>>>>> module. I am seeing these:
>>>>>>>>>>>>
>>>>>>>>>>>> [  456.574969] dvb_ca adapter 0: Invalid PC card
>>>>>>>>>>>> inserted :(
>>>>>>>>>>>> [  456.626943] dvb_ca adapter 1: Invalid PC card
>>>>>>>>>>>> inserted :(
>>>>>>>>>>>> [  456.666932] dvb_ca adapter 2: Invalid PC card
>>>>>>>>>>>> inserted :(
>>>>>>>>>>>>
>>>>>>>>>>>> The normal 'CAM detected and initialised' messages
>>>>>>>>>>>> to do show
>>>>>>>>>>>> up with
>>>>>>>>>>>> 4.0.8
>>>>>>>>>>>>
>>>>>>>>>>>> I am not sure what changed in the recent kernels,
>>>>>>>>>>>> what is
>>>>>>>>>>>> needed to
>>>>>>>>>>>> debug this?
>>>>>>>>>>>>
>>>>>>>>>>>> Jurgen
>>>>>>>>>>>
>>>>>>>>>>> Retest. I've isolated one T980C on another PC with
>>>>>>>>>>> kernel
>>>>>>>>>>> 4.1.5, still the same 'Invalid PC card inserted :('
>>>>>>>>>>> message.
>>>>>>>>>>> Even after installed today's media_build from git no
>>>>>>>>>>> improvement.
>>>>>>>>>>>
>>>>>>>>>>> Any hints where to start looking would be
>>>>>>>>>>> appreciated!
>>>>>>>>>>>
>>>>>>>>>>> cimax2.c|h do not seem to have changed. There are
>>>>>>>>>>> changes to
>>>>>>>>>>> dvb_ca_en50221.c
>>>>>>>>>>>
>>>>>>>>>>> Jurgen
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> did you get it to work?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> No, it needs a thorough debug session. So far no one
>>>>>>>>> seems able to
>>>>>>>>> help...
>>>>>>>>>
>>>>>>>>>> i got a dvbsky T980C too for dvb-t2 reception and so
>>>>>>>>>> far the only
>>>>>>>>>> drivers that have worked at all is the ones from dvbsky
>>>>>>>>>> directly.
>>>>>>>>>>
>>>>>>>>>> i was very happy when i noticed that recent kernels
>>>>>>>>>> have support
>>>>>>>>>> for it
>>>>>>>>>> built in but unfortunately only the modules and
>>>>>>>>>> firmware loads
>>>>>>>>>> but then
>>>>>>>>>> nothing actually works.
>>>>>>>>>> i use mythtv and it complains a lot about the signal,
>>>>>>>>>> running
>>>>>>>>>> femon also
>>>>>>>>>> produces lots of errors.
>>>>>>>>>>
>>>>>>>>>> so i had to switch back to kernel 4.0.4 with mediabuild
>>>>>>>>>> from
>>>>>>>>>> dvbsky.
>>>>>>>>>>
>>>>>>>>>> if there were any other dvb-t2 card with ci support
>>>>>>>>>> that had
>>>>>>>>>> better
>>>>>>>>>> drivers i would change right away.
>>>>>>>>>>
>>>>>>>>>> one problem i have with the mediabuilt from dvbsky is
>>>>>>>>>> that at
>>>>>>>>>> boot the
>>>>>>>>>> cam never works and i have to first tune a channel,
>>>>>>>>>> then remove
>>>>>>>>>> and
>>>>>>>>>> reinstert the cam to get it to work.
>>>>>>>>>> without that nothing works.
>>>>>>>>>>
>>>>>>>>>> and finally a problem i ran into when i tried
>>>>>>>>>> mediabuilt from
>>>>>>>>>> linuxtv.org.
>>>>>>>>>> fedora uses kernel modules with .ko.xz extension so
>>>>>>>>>> when you
>>>>>>>>>> install the
>>>>>>>>>> mediabuilt modulels you get one modulename.ko and one
>>>>>>>>>> modulename.ko.xz
>>>>>>>>>>
>>>>>>>>>> before a make install from mediabuild overwrote the
>>>>>>>>>> needed
>>>>>>>>>> modules.
>>>>>>>>>> any advice on how to handle this now?
>>>>>>>>>>