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

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

[Hans Verkuil]

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@linux.intel.com> (Intel)
Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
Deborah Brouwer <deborahbrouwer3563@gmail.com>
Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
Ricardo Ribalda <ribalda@chromium.org> (Google)
Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
Martin Hecht <martin.hecht@avnet.eu> (Avnet)
Jai Luthra <j-luthra@ti.com> (TI)
Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
Michael Roeder <michael.roeder@avnet.eu> (Avnet)
Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
Martin Tůma <tumic@gpxsee.org> (GPXSee)
Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative, after 16:30 only)
Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)

Remote Attendees:

Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative, afternoon only)
Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/

    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@synaptics.com/
    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@collabora.com/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@linux.intel.com/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

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

[Hans Verkuil]

I received a question regarding the face mask policy. We will follow the
same guidance that the Linux Foundation gives for the EOSS conference:

https://events.linuxfoundation.org/embedded-open-source-summit/attend/health-and-safety/

So: "Masks are recommended, but not required, to be worn at the event."

Regards,

	Hans

On 02/06/2023 14:40, 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@linux.intel.com> (Intel)
> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
> Deborah Brouwer <deborahbrouwer3563@gmail.com>
> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
> Ricardo Ribalda <ribalda@chromium.org> (Google)
> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
> Jai Luthra <j-luthra@ti.com> (TI)
> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
> Martin Tůma <tumic@gpxsee.org> (GPXSee)
> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative, after 16:30 only)
> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
> 
> Remote Attendees:
> 
> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative, afternoon only)
> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
> 
>     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@synaptics.com/
>     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@collabora.com/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@linux.intel.com/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

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

[dwlsalmeida]

Hans, I am missing myself as an atendee?

I thought that was implied since I'll be presenting.

-- 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@linux.intel.com> (Intel)
> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
> Deborah Brouwer <deborahbrouwer3563@gmail.com>
> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
> Ricardo Ribalda <ribalda@chromium.org> (Google)
> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
> Jai Luthra <j-luthra@ti.com> (TI)
> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
> Martin Tůma <tumic@gpxsee.org> (GPXSee)
> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
> after 16:30 only)
> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
> 
> Remote Attendees:
> 
> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
> afternoon only)
> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
> 
>     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@synaptics.com/
>     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@collabora.com/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@linux.intel.com/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

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

[Hans Verkuil]

On 02/06/2023 15:40, dwlsalmeida@gmail.com 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@collabora.com> (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@linux.intel.com> (Intel)
>> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
>> Deborah Brouwer <deborahbrouwer3563@gmail.com>
>> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
>> Ricardo Ribalda <ribalda@chromium.org> (Google)
>> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
>> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
>> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
>> Jai Luthra <j-luthra@ti.com> (TI)
>> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
>> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
>> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
>> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
>> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
>> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
>> Martin Tůma <tumic@gpxsee.org> (GPXSee)
>> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
>> after 16:30 only)
>> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
>> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>>
>> Remote Attendees:
>>
>> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
>> afternoon only)
>> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>>
>>     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@synaptics.com/
>>     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@collabora.com/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@linux.intel.com/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
> 

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

[Chen-Yu Tsai]

Hi Hans,

On Fri, Jun 2, 2023 at 9:44 PM Hans Verkuil <hverkuil@xs4all.nl> wrote:
>
> On 02/06/2023 15:40, dwlsalmeida@gmail.com 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@collabora.com> (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@linux.intel.com> (Intel)
> >> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
> >> Deborah Brouwer <deborahbrouwer3563@gmail.com>
> >> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
> >> Ricardo Ribalda <ribalda@chromium.org> (Google)
> >> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
> >> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
> >> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
> >> Jai Luthra <j-luthra@ti.com> (TI)
> >> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
> >> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
> >> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
> >> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
> >> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
> >> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
> >> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
> >> Martin Tůma <tumic@gpxsee.org> (GPXSee)
> >> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
> >> after 16:30 only)
> >> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
> >> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
> >>
> >> Remote Attendees:
> >>
> >> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
> >> afternoon only)
> >> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
> >>
> >>     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@synaptics.com/
> >>     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@collabora.com/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@linux.intel.com/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
> >
>

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

[Hans Verkuil]

On 02/06/2023 15:47, Chen-Yu Tsai wrote:
> Hi Hans,
> 
> On Fri, Jun 2, 2023 at 9:44 PM Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>
>> On 02/06/2023 15:40, dwlsalmeida@gmail.com 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@collabora.com> (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@linux.intel.com> (Intel)
>>>> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
>>>> Deborah Brouwer <deborahbrouwer3563@gmail.com>
>>>> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
>>>> Ricardo Ribalda <ribalda@chromium.org> (Google)
>>>> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
>>>> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
>>>> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
>>>> Jai Luthra <j-luthra@ti.com> (TI)
>>>> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
>>>> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
>>>> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
>>>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
>>>> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
>>>> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
>>>> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
>>>> Martin Tůma <tumic@gpxsee.org> (GPXSee)
>>>> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
>>>> after 16:30 only)
>>>> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
>>>> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>>>>
>>>> Remote Attendees:
>>>>
>>>> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
>>>> afternoon only)
>>>> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>>>>
>>>>     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@synaptics.com/
>>>>     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@collabora.com/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@linux.intel.com/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
>>>
>>

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

[Benjamin Mugnier]

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 !

On 6/2/23 15:44, Hans Verkuil wrote:
> On 02/06/2023 15:40, dwlsalmeida@gmail.com 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@collabora.com> (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@linux.intel.com> (Intel)
>>> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
>>> Deborah Brouwer <deborahbrouwer3563@gmail.com>
>>> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
>>> Ricardo Ribalda <ribalda@chromium.org> (Google)
>>> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
>>> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
>>> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
>>> Jai Luthra <j-luthra@ti.com> (TI)
>>> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
>>> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
>>> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
>>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
>>> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
>>> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
>>> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
>>> Martin Tůma <tumic@gpxsee.org> (GPXSee)
>>> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
>>> after 16:30 only)
>>> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
>>> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>>>
>>> Remote Attendees:
>>>
>>> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
>>> afternoon only)
>>> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>>>
>>>     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@synaptics.com/
>>>     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@collabora.com/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@linux.intel.com/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
>>
> 

-- 
Regards,

Benjamin

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

[Hans Verkuil]

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@gmail.com 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@collabora.com> (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@linux.intel.com> (Intel)
>>>> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
>>>> Deborah Brouwer <deborahbrouwer3563@gmail.com>
>>>> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
>>>> Ricardo Ribalda <ribalda@chromium.org> (Google)
>>>> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
>>>> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
>>>> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
>>>> Jai Luthra <j-luthra@ti.com> (TI)
>>>> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
>>>> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
>>>> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
>>>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
>>>> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
>>>> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
>>>> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
>>>> Martin Tůma <tumic@gpxsee.org> (GPXSee)
>>>> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative,
>>>> after 16:30 only)
>>>> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
>>>> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>>>>
>>>> Remote Attendees:
>>>>
>>>> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative,
>>>> afternoon only)
>>>> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>>>>
>>>>     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@synaptics.com/
>>>>     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@collabora.com/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@linux.intel.com/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
>>>
>>
> 

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

[Umang Jain]

Hi Hans,

I am Umang and has been a contributor to libcamera.

I would like to attend the media-summit remotely. I am not sure if I 
have to register anywhere or just ask you to add me to the remote 
attendees list.

Umang Jain <umang.jain@ideasonboard.com> (Ideas On Board)

Thanks!

On 6/2/23 6:10 PM, 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@linux.intel.com> (Intel)
> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
> Deborah Brouwer <deborahbrouwer3563@gmail.com>
> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
> Ricardo Ribalda <ribalda@chromium.org> (Google)
> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
> Jai Luthra <j-luthra@ti.com> (TI)
> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
> Martin Tůma <tumic@gpxsee.org> (GPXSee)
> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative, after 16:30 only)
> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>
> Remote Attendees:
>
> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative, afternoon only)
> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>
>      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@synaptics.com/
>      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@collabora.com/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@linux.intel.com/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

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

[Hans Verkuil]

On 06/06/2023 11:57, Umang Jain wrote:
> 
> Hi Hans,
> 
> I am Umang and has been a contributor to libcamera.
> 
> I would like to attend the media-summit remotely. I am not sure if I have to register anywhere or just ask you to add me to the remote attendees list.
> 
> Umang Jain <umang.jain@ideasonboard.com> (Ideas On Board)

That's all I need! I'll post instructions for the Webex meeting a few days before
the summit starts.

Regards,

	Hans

> 
> Thanks!
> 
> On 6/2/23 6:10 PM, 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@linux.intel.com> (Intel)
>> Kieran Bingham <kieran.bingham@ideasonboard.com> (Ideas On Board)
>> Deborah Brouwer <deborahbrouwer3563@gmail.com>
>> Mauro Carvalho Chehab <mchehab@kernel.org> (Intel)
>> Ricardo Ribalda <ribalda@chromium.org> (Google)
>> Marco Felsch <m.felsch@pengutronix.de> (Pengutronix)
>> Sebastian Fricke <sebastian.fricke@collabora.com> (Collabora)
>> Martin Hecht <martin.hecht@avnet.eu> (Avnet)
>> Jai Luthra <j-luthra@ti.com> (TI)
>> Tommaso Merciai <tomm.merciai@gmail.com> (Avnet)
>> Jacopo Mondi <jacopo.mondi@ideasonboard.com> (Ideas On Board)
>> Andrzej Pietrasiewicz <andrzej.p@collabora.com> (Collabora)
>> Laurent Pinchart <laurent.pinchart@ideasonboard.com> (Ideas On Board)
>> Michael Roeder <michael.roeder@avnet.eu> (Avnet)
>> Niklas Söderlund <niklas.soderlund@ragnatech.se> (Ragnatech)
>> Dave Stevenson <dave.stevenson@raspberrypi.com> (Raspberry Pi)
>> Martin Tůma <tumic@gpxsee.org> (GPXSee)
>> Stanimir Varbanov <stanimir.varbanov@linaro.org> (Linaro, tentative, after 16:30 only)
>> Hans Verkuil <hverkuil-cisco@xs4all.nl> (Cisco Systems Norway)
>> Alain Volmat <alain.volmat@foss.st.com> (ST Electronics)
>>
>> Remote Attendees:
>>
>> Nicolas Dufresne <nicolas@ndufresne.ca> (Collabora, tentative, afternoon only)
>> Hsia-Jun Li <Randy.Li@synaptics.com> (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@soulik.info/
>>
>>      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@synaptics.com/
>>      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@collabora.com/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@linux.intel.com/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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