Re: mb86a20s and cx23885

["Alfredo Jesús Delaiti" <alfredodelaiti@netscape.net>]

Hi

El 17/07/13 16:23, Mauro Carvalho Chehab escribió:
>
> No. You'll need to clone the entire kernel tree (either Linus one or
> mine).
>
> The build system at the Kernel will rebuild an entire Kernel image.
> You'll then need to boot that new image.
>
> That takes some machine time, but, after the first compilation, the
> subsequent compilations are faster.
>
> I recommend you to use a minimal .config file for the compilation,
> as this speeds up a lot the time to compile the Kernel.
> Here, I use this small script to produce such mini-kernel:
> 	http://ftp.suse.com/pub/people/tiwai/misc/diet-kconfig
>
> After running it (and using the default for whatever question it
> asks me), I do a make menuconfig, to be sure that the media
> drivers and options I want are there.
>
> In summary, what I suggest is:
>
> 	$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> 	$ git checkout v3.2
> 	$ git bisect good
> 	$ diet-kconfig
> 	$ make menuconfig
>
> 	select what is missed at media stuff
>
> 	$ make && make modules install && make install & reboot
>
> 	after reboot check if everything is ok
>
> 	$ git bisect bad v3.4
>
> repeat:
> 	$ make && make modules install && make install & reboot
> 	
> 	it will likely ask you about some new drivers =  it is generally safe
> 	to just let the default - just be more careful with the media
> 	menuconfig items
>
> 	test the kernel:
> 	if OK:
> 		$ git bisect good
> 	if BAD:
> 		$ git bisect bad
> 	if git bisect answers that there are xxx bisects left, then goto repeat
>
> After running the above, git bisect will put its fingers on the broken patch.
>
>
> Cheers, Mauro --

I found the patch that affects the X8507 board is: commit 
a7d44baaed0a8c7d4c4fb47938455cb3fc2bb1eb

--------
alfredo@linux-puon:/usr/src/git/linux> git stash
Saved working directory and index state WIP on (no branch): c6f56e7 
[media] dvb: don't use DVBv3 bandwidth macros
HEAD is now at c6f56e7 [media] dvb: don't use DVBv3 bandwidth macros
alfredo@linux-puon:/usr/src/git/linux> git bisect good
a7d44baaed0a8c7d4c4fb47938455cb3fc2bb1eb is the first bad commit
commit a7d44baaed0a8c7d4c4fb47938455cb3fc2bb1eb
Author: Mauro Carvalho Chehab <mchehab@redhat.com>
Date:   Mon Dec 26 20:48:54 2011 -0300

     [media] cx23885-dvb: Remove a dirty hack that would require DVBv3

     The cx23885-dvb driver has a dirty hack:
         1) it hooks the DVBv3 legacy call to FE_SET_FRONTEND;
         2) it uses internally the DVBv3 struct to decide some
            configs.

     Replace it by a change during the gate control. This will
     likely work, but requires testing. Anyway, the current way
     will break, as soon as we stop copying data for DVBv3 for
     pure DVBv5 calls.

     Compile-tested only.

     Cc: Michael Krufky <mkrufky@linuxtv.org>
     Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

:040000 040000 6d0695eb9e59b837425ed64d4e2be6625864b609 
89700b867069ec0ad2713367e607763e91798e98 M      drivers
--------


I manually removed the patch, then the TV card works.


Unfortunately my lack of knowledge prevents me fix it.

I test new code with pleasure :) !

Thanks,

Alfredo