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. 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 > > >
