On Tue, 2018-11-06 at 09:37 +0100, Hans Verkuil wrote: > Hi all, > > After the media summit (heavy on test discussions) and the V4L2 event > regression > we just found it is clear we need to do a better job with testing. > > All the pieces are in place, so what is needed is to combine it and create a > script that anyone of us as core developers can run to check for regressions. > The same script can be run as part of the kernelci regression testing. > > We have four virtual drivers: vivid, vim2m, vimc and vicodec. The last one > is IMHO not quite good enough yet for testing: it is not fully compliant to > the > upcoming stateful codec spec. Work for that is planned as part of an Outreachy > project. > > My idea is to create a script that is maintained as part of v4l-utils that > loads the drivers and runs v4l2-compliance and possibly other tests against > the virtual drivers. > > It should be simple to use and require very little in the way of dependencies. > Ideally no dependencies other than what is in v4l-utils so it can easily be > run > on an embedded system as well. > > For a 64-bit kernel it should run the tests both with 32-bit and 64-bit > applications. > > It should also test with both single and multiplanar modes where available. > > Since vivid emulates CEC as well, it should run CEC tests too. > > As core developers we should have an environment where we can easily test > our patches with this script (I use a VM for that). >
It's quite trivial to setup a qemu environment for this, e.g. you can use virtme [1] and set it up so that it runs a script after booting. > I think maintaining the script (or perhaps scripts) in v4l-utils is best since > that keeps it in sync with the latest kernel and v4l-utils developments. > > Comments? Ideas? > Sounds great. I think it makes a lot of sense to have a script for CIs and developers to run. I guess we can start simple, with just a bash script? > Regards, > > Hans [1] https://www.collabora.com/news-and-blog/blog/2018/09/18/virtme-the-kernel-developers-best-friend/
