Em Mon, 24 Sep 2018 16:42:13 +0200 Hans Verkuil <hverkuil@xxxxxxxxx> escreveu: > Hi all, > > We are organizing a media mini-summit on Thursday October 25th in > Edinburgh, Edinburgh International Conference Centre. > > If you plan to attend, please let Mauro know. It is open for all, but > we have a limited number of seats. No need to let me explicitly know in advance, but be sure to register for it at the ELCE/OSS register site. I'll use their tracking system to know who will be there. We have a limited number of seats there, and I'm relying on their system to control the number of attendees for us. > > Name of the room for the summit: TBD I'll get the room name with the event organizers and post it later on this thread. > > Currently known attendees (please add/remove names as needed): > > Sakari Ailus <sakari.ailus@xxxxxx> > Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> > Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx> > Michael Ira Krufky <mkrufky@xxxxxxxxxxx> > Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx> > Hans Verkuil <hverkuil@xxxxxxxxx> > Sean Young <sean@xxxxxxxx> > > Agenda (First draft!) > ===================== > > General remarks: the given start/end times for the various topics are > approximate since it is always hard to predict how long a discussion will take. > If people are attending other summits and those conflict with specific media > topics they want to be part of, then let me know and we can rearrange the > schedule to (hopefully) accommodate that. > > 9:00-9:15: Introduction (Hans Verkuil) > > 9:15-9:30: Status of the HDMI CEC kernel support (Hans Verkuil) > Give a quick overview of the status: what has been merged, what is > still pending, what is under development. > > 9:30-9:45: Save/restore controls from MTD (Ricardo Ribalda Delgado) > Industrial/Scientific sensors usually come with very extensive > calibration information such as: per column gain, list of dead > pixels, temperature sensor offset... etc > > We are saving that information on an flash device that is located > by the sensor. > > Show how we are integrating that calibration flash with v4l2-ctrl. > And if this feature is useful for someone else and upstream it. > > 9:45-11:00: Complex Cameras (Mauro Carvalho Chehab) > I expect that we could have something to discuss there about complex > cameras. So, I'd reserve a 50 mins slot for it. > > The idea is to discuss about the undergoing work with complex camera > development is happening. > > As we're working to merge request API, another topic for discussion > is how to add support for requests on it (or on a separate but related > library). > > 11:00-11:15: Break > > 11:15-12:00: Automated Testing (Ezequiel Garcia) > There is a lot of discussion going on around testing, > so it's a good opportunity for us to talk about our > current testing infrastructure. > > We are already doing a good job with v4l2-compliance. > Can we do more? > > Lunch > > 13:30-14:30: Stateless Codec userspace (Hans Verkuil) > Support for stateless codecs and Request API should be merged for > 4.20, and the next step is to discuss how to organize the userspace > support. > > Hopefully by the time the media summit starts we'll have some better > ideas of what we want in this area. > > 14:30-15:15: Which ioctls should be replaced with better versions? (Hans Verkuil) > Some parts of the V4L2 API are awkward to use and I think it would be > a good idea to look at possible candidates for that. > > Examples are the ioctls that use struct v4l2_buffer: the multiplanar support is > really horrible, and writing code to support both single and multiplanar is hard. > We are also running out of fields and the timeval isn't y2038 compliant. > > A proof-of-concept is here: > > https://git.linuxtv.org/hverkuil/media_tree.git/commit/?h=v4l2-buffer&id=a95549df06d9900f3559afdbb9da06bd4b22d1f3 > > It's a bit old, but it gives a good impression of what I have in mind. > > Another candidate is VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL/VIDIOC_ENUM_FRAMEINTERVALS: > expressing frame intervals as a fraction is really awkward and so is the fact > that the subdev and 'normal' ioctls are not the same. > > Discuss what possible other ioctls are candidates for a refresh. > > 15:15-15:30: Break > > 15:30-16:00: Discuss the media development process > Since we are all here, discuss any issues there may be with the media > subsystem development process. Anything to improve? > > 16:00-16:15: Wrap up > Create action items (and who will take care of them) if needed. > Summarize and conclude the day. > > End of the day: Key Signing Party > > Regards, > > Hans Thanks, Mauro
