Re: [ANN] Media Summit June 26th: Draft Agenda v3

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On 05/06/2023 10:32, Benjamin Mugnier wrote:
> Hi everyone,
> 
> Hope I'm not too late. I had issues with my passport and won't be able
> to make it this year again :'(
> I'd like to attend in remote if still possible, and not too difficult to
> setup.
> 
> Thanks a ton !

I added you as a remote participant.

Regards,

	Hans

> 
> On 6/2/23 15:44, Hans Verkuil wrote:
>> On 02/06/2023 15:40, dwlsalmeida@xxxxxxxxx wrote:
>>> Hans, I am missing myself as an atendee?
>>>
>>> I thought that was implied since I'll be presenting.
>>
>> Oops, now adding you to the attendees list:
>>
>> Daniel Almeida <daniel.almeida@xxxxxxxxxxxxx> (Collabora)
>>
>> You did reply to the 'request for topics' email, but not to the 'please let
>> me know if you will attend' email, and I forgot that the first implied the
>> second :-)
>>
>> Thank you for pointing this out!
>>
>> 	Hans
>>
>>>
>>> -- Daniel
>>>
>>>
>>> On Fri, 2023-06-02 at 14:40 +0200, Hans Verkuil wrote:
>>>> Hi all,
>>>>
>>>> This is version 3 of the agenda for the media summit. As always, it
>>>> is subject to change and all times are guesstimates!
>>>>
>>>> The media summit will be held at the Holiday Inn which is close to
>>>> the
>>>> conference centre where the Embedded Open Source Summit is held:
>>>>
>>>> Holiday Inn Prague Congress Centre - Meeting room "E"
>>>> Na Pankráci 1684/ 15, 140 00 Praha 4-Nusle
>>>> https://www.ihg.com/holidayinn/hotels/us/en/prague/prgnp/hoteldetail
>>>>
>>>> Refreshments (tea/coffee/soda) are available during the day.
>>>>
>>>> The meeting room is sponsored by Collabora and Cisco Systems Norway.
>>>> And lunch is sponsored by Ideas On Board.
>>>>
>>>> Many thanks to the sponsors!
>>>>
>>>> In-Person Attendees:
>>>>
>>>> Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> (Intel)
>>>> Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx> (Ideas On Board)
>>>> Deborah Brouwer <deborahbrouwer3563@xxxxxxxxx>
>>>> Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> (Intel)
>>>> Ricardo Ribalda <ribalda@xxxxxxxxxxxx> (Google)
>>>> Marco Felsch <m.felsch@xxxxxxxxxxxxxx> (Pengutronix)
>>>> Sebastian Fricke <sebastian.fricke@xxxxxxxxxxxxx> (Collabora)
>>>> Martin Hecht <martin.hecht@xxxxxxxx> (Avnet)
>>>> Jai Luthra <j-luthra@xxxxxx> (TI)
>>>> Tommaso Merciai <tomm.merciai@xxxxxxxxx> (Avnet)
>>>> Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx> (Ideas On Board)
>>>> Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx> (Collabora)
>>>> Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> (Ideas On Board)
>>>> Michael Roeder <michael.roeder@xxxxxxxx> (Avnet)
>>>> Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx> (Ragnatech)
>>>> Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> (Raspberry Pi)
>>>> Martin Tůma <tumic@xxxxxxxxxx> (GPXSee)
>>>> Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx> (Linaro, tentative,
>>>> after 16:30 only)
>>>> Hans Verkuil <hverkuil-cisco@xxxxxxxxx> (Cisco Systems Norway)
>>>> Alain Volmat <alain.volmat@xxxxxxxxxxx> (ST Electronics)
>>>>
>>>> Remote Attendees:
>>>>
>>>> Nicolas Dufresne <nicolas@xxxxxxxxxxxx> (Collabora, tentative,
>>>> afternoon only)
>>>> Hsia-Jun Li <Randy.Li@xxxxxxxxxxxxx> (Synaptics)
>>>>
>>>> I will email details on how to join remotely a few days before the
>>>> media summit
>>>> starts.
>>>>
>>>> If you are listed as attendee (in person or remote) and you can't
>>>> attend
>>>> after all, please let me know.
>>>>
>>>> If you are listed as presenting a topic during the meeting, then
>>>> please
>>>> check if the details are correct. It would be really appreciated if
>>>> you
>>>> can post any slides you have before the meeting (just reply to this
>>>> message
>>>> with the presentation attached).
>>>>
>>>> Agenda:
>>>>
>>>> 8:45-9:15: get settled :-)
>>>>
>>>> 9:15-9:25: Hans: Quick introduction
>>>>
>>>> 9:25-10:15: Daniel Almeida: Rust V4L2 support
>>>>
>>>>     Discuss the potential blockers as well as the roadmap and
>>>> priorities for
>>>>     bindings. Present what is currently supported and what isn't in
>>>> the Rust
>>>>     code for V4L2. Identify potential candidates for new drivers that
>>>> can be
>>>>     written in Rust. Discuss about maintainership issues related to
>>>> Rust in V4L2.
>>>>
>>>> 10:15-10:30: Break
>>>>
>>>> 10:30-11:15 Hans & Hsia-Jun Li: "Add extended fmt and buffer" patch
>>>> series
>>>>
>>>>    
>>>> https://patchwork.linuxtv.org/project/linux-media/cover/20230206043308.28365-1-ayaka@xxxxxxxxxxx/
>>>>
>>>>     We've been postponing the work on this, but I think we need to
>>>> decide how to
>>>>     proceed since pixel formats and single vs multi planar is getting
>>>> to be a nightmare.
>>>>
>>>>     More details from Hsia-Jun Li:
>>>>
>>>>     1. v4l2 header would only maintain the codec format and pixel
>>>> format in bus.
>>>>     2. the pixel formats would be maintained by the DirectRender,
>>>> those M
>>>>        variant would not be supported in the new extend pixel format
>>>> API.
>>>>     3. The number of plane for a pixel format would also responds for
>>>> its data
>>>>        layout. Ex. NV12 = 2 planes(luma, chroma), I420 = 3 planes(Y,
>>>> U, V).
>>>>     4. Userspace that supports new extend API could access those
>>>> driver didn't
>>>>        adapt the new API, kernel would have a backward compatible
>>>> layer. While
>>>>        the opposite backward compatible is not offered (old API
>>>> userspace can't
>>>>        access the driver support the new API).
>>>>
>>>>     [optional part]
>>>>     5. An alloc flag would be introduced for allocating those M
>>>> variant buf.
>>>>       
>>>> https://lore.kernel.org/lkml/20230322105226.122467-1-randy.li@xxxxxxxxxxxxx/
>>>>     6. Stateless codec format would be a modifier to the stateful
>>>> codec format.
>>>>        We could support different packing mode here.
>>>>
>>>> 11:15-11:30: Break
>>>>
>>>> 11:30-12:15: Andrzej Pietrasiewicz: Stateless Encoders: VP8
>>>>
>>>>     - Introduction to stateless encoders and previous work in this
>>>> area
>>>>
>>>>     https://github.com/bootlin/linux/tree/hantro/h264-encoding-v5.11
>>>>
>>>>    
>>>> https://lore.kernel.org/linux-arm-kernel/20230309125651.23911-1-andrzej.p@xxxxxxxxxxxxx/T/
>>>>
>>>>     - High level decisions
>>>>     - Rate control
>>>>     - VP8 uAPI
>>>>     - Challenges
>>>>
>>>> 12:15-13:30: Lunch
>>>>
>>>> 13:30-14:00: Ricardo Ribalda Delgado: KCAM update
>>>>
>>>>     I would like to share the progress on KCAM from our end.
>>>>
>>>>     I am also trying to collect all the requirements that we are
>>>> getting
>>>>     from vendors regarding V4L2.
>>>>
>>>> 14:00-14:45: Sakari: generic line-based metadata formats:
>>>>
>>>>    
>>>> https://lore.kernel.org/linux-media/20230505215257.60704-1-sakari.ailus@xxxxxxxxxxxxxxx/T/#t
>>>>
>>>> 14:45-??:??: Mauro & sub-maintainers: Subsystem development process
>>>>
>>>>     How to improve it? How do we get more maintainers? It's not
>>>> working very
>>>>     well at the moment.
>>>>
>>>>     Mauro will present how the media CI works today.
>>>>     Hans will present how the daily build scripts work.
>>>>
>>>>     Can this be harmonized?
>>>>
>>>> Final short topic: Hans: Should we keep the media summit together
>>>> with the ELCE conference?
>>>>     Or organize it separately, and ask a company like Cisco, Intel or
>>>> Collabora
>>>>     to organize a room. What would work best? Anything to improve on
>>>> this?
>>>>
>>>> We have the room until 18:30, but (fingers crossed) I hope to finish
>>>> before that.
>>>>
>>>> The "Add extended fmt and buffer" and the "Subsystem development
>>>> process" are
>>>> *very* hard to predict. I want to limit the initial discussion of the
>>>> that first
>>>> topic to 45-60 minutes, and continue (if needed) in the afternoon
>>>> after the discussion
>>>> about the subsystem development process. We will have see how it
>>>> goes.
>>>>
>>>> Please reply with corrections, questions, etc. to this email. I'll
>>>> update the agenda
>>>> over time.
>>>>
>>>> Regards,
>>>>
>>>>         Hans
>>>
>>
> 




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