Em Thu, 17 Dec 2015 14:52:21 +0100 Mason <slash.tmp@xxxxxxx> escreveu: > Hello Mauro, > > On 17/12/2015 13:55, Mauro Carvalho Chehab wrote: > > > Mason wrote: > > > >> I have a TechnoTrend TT-TVStick CT2-4400v2 USB tuner, as described here: > >> http://linuxtv.org/wiki/index.php/TechnoTrend_TT-TVStick_CT2-4400 > >> > >> According to the article, the device is supported since kernel 3.19 > >> and indeed, if I use a 4.1 kernel, I can pick CONFIG_DVB_USB_DVBSKY > >> and everything seems to work. > >> > >> Unfortunately (for me), I've been asked to make this driver work on > >> an ancient 3.4 kernel. > >> > >> The linuxtv article mentions: > >> > >> "Drivers are included in kernel 3.17 (for version 1) and 3.19 (for version 2). > >> They can be built with media_build for older kernels." > >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > >> > >> This seems to imply that I can use the media_build framework to > >> automatically (??) back-port a 3.19 driver to a 3.4 kernel? > > > > "automatically" is a complex word ;) > > If I get it working, I think you can even say "auto-magically" ;-) > > >> This sounds too good to be true... > >> How far back can I go? > > > > The goal is to allow compilation since 2.6.32, but please notice that > > not all drivers will go that far. Basically, when the backport seems too > > complex, we just remove the driver from the list of drivers that are > > compiled for a given legacy version. > > > > Se the file v4l/versions.txt to double-check if the drivers you need > > have such restrictions. I suspect that, in the specific case of > > DVB_USB_DVBSKY, it should compile. > > That is great news. > > > That doesn't mean that it was tested there. We don't test those > > backports to check against regressions. We only work, at best > > effort basis, to make them to build. So, use it with your own > > risk. If you find any problems, feel free to send us patches > > fixing it. > > My first problem is that compilation fails on the first file ;-) > See attached log. > > My steps are: > > cd media_build/linux > make tar DIR=/tmp/sandbox/media_tree > make untar > cd .. > make release DIR=/tmp/sandbox/custom-linux-3.4 > make > > I will investigate and report back. Then I guess you're not using vanilla 3.4 Kernel, but some heavily modified version. You're on your own here. Regards, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
