On 09/24/2018 07:12 PM, Mauro Carvalho Chehab wrote:
> Em Mon, 24 Sep 2018 16:42:13 +0200
> Hans Verkuil <[email protected]> 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.
Do you have a link of where to register? How many registrations do we have now?
Regards,
Hans
>
>>
>> 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 <[email protected]>
>> Mauro Carvalho Chehab <[email protected]>
>> Ezequiel Garcia <[email protected]>
>> Michael Ira Krufky <[email protected]>
>> Laurent Pinchart <[email protected]>
>> Ricardo Ribalda Delgado <[email protected]>
>> Hans Verkuil <[email protected]>
>> Sean Young <[email protected]>
>>
>> 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
>
