Re: [ANN] Draft Agenda for the media summit on Thursday Oct 25th in Edinburgh

[Helen Koike <helen.koike@collabora.com>]

Hi Hans and Mauro,


On 9/24/18 11:42 AM, Hans Verkuil wrote:
> 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.

I believe I also I selected attendance when registering for the
conference. Please add my name too.

> 
> Name of the room for the summit: TBD
> 
> Currently known attendees (please add/remove names as needed):
> 
> Sakari Ailus <sakari.ailus@iki.fi>
> Mauro Carvalho Chehab <mchehab@s-opensource.com>
> Ezequiel Garcia <ezequiel@collabora.com>
> Michael Ira Krufky <mkrufky@linuxtv.org>
> Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> Hans Verkuil <hverkuil@xs4all.nl>
> Sean Young <sean@mess.org>
> 
> 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
Helen