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

[Jurgen Kramer <gtmkramer@xs4all.nl>]

On Tue, 2016-02-16 at 22:20 +0200, 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.
Great! Thanks for looking into this.

Jurgen

> 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.co
> > > m>
> > > 
> > > 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@xs4al
> > > > > l.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?
> > > > > > > 
> > > > > > > 
> > > > > > 
> > > > > > 
> > > > > > --
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> >