On 02/06/2023 15:47, Chen-Yu Tsai wrote: > Hi Hans, > > On Fri, Jun 2, 2023 at 9:44 PM Hans Verkuil <hverkuil@xxxxxxxxx> 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 :-) > > If there are still seats available, I would like to attend in person. > I am very interested in the "extended fmt and buffer" work. > > Please note that I will not be representing my employer. There are still two seats available, so I've added you to the list. Regards, Hans > > ChenYu > > >> 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 >>> >>
