Re: [ANNv4] Media Summit on May 26th in Nice, France

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

On Mon, Apr 13, 2026 at 04:25:54PM -0400, Nicolas Dufresne wrote:
> Le lundi 13 avril 2026 à 23:19 +0300, Laurent Pinchart a écrit :
> > On Mon, Apr 13, 2026 at 10:03:52PM +0200, Loic Poulain wrote:
> > > Hi Hans,
> > > 
> > > I would be happy to discuss this if a slot is available:
> > > 
> > > Title: Generic V4L2 ISP M2M framework
> > > Presenter: Loic Poulain
> > > Time estimate: ~20min
> > > Description: During early development of a Qualcomm Offline Image
> > > Processing Engine (OPE), we relied on the V4L2 memory‑to‑memory
> > > (v4l2‑m2m) framework, which is widely used and provides solid support
> > > for buffer management and scheduling. However, applying it to an ISP
> > > use case exposes limitations: ISP engines often require a richer media
> > > graph, with multiple pads and metadata flows, similar to inline ISP
> > > pipelines (params, stats, outputs). This talk proposes discussing the
> > > need for and design of a common V4L2 ISP M2M framework to factor out
> > > shared functionality across drivers, particularly around buffer/queue
> > > management and job scheduling.
> > 
> > That's well aligned with the v4l2-isp framework that Jacopo started, and
> > to the multi-context and media-jobs APIs that we have proposed. I
> > wonder, however, if a short session at the media summit will be enough,
> > or if we should try to organize a half day brainstorming workshop at
> > some point. Depending on when the people interested in this topic plan
> > to arrive, Monday could be an option.
> 
> I'm also/still interested in the multi-context for m2m decoders that have inline
> post-processing capabilities (current model forces us to waste a lot of RAM). We
> just restarted some design discussion with the team, with an increased
> confidence that multi-context is the way. The scheduler could come handy in the
> future if we get to deal with more multi-stage codecs in the future. I'll be in
> Nice all day Monday.

I will unfortunately be available only until 15:00 on Monday, but Jacopo
should be available through the day. Let's see who would be interested
and available, and try to organize something.

> > > On Sun, Apr 12, 2026 at 12:25 PM Hans Verkuil wrote:
> > > > 
> > > > (Please pass this on to anyone you think might be interested in this!)
> > > > 
> > > > Hi all,
> > > > 
> > > > This is the fourth version of this announcement, updating the list of
> > > > attendees
> > > > and the tentative agenda at the end: please let me know if you see
> > > > mistakes.
> > > > Note that there is still time for one or two other topics. Also please
> > > > check
> > > > the agenda if you need more (or perhaps less) time for your topic.
> > > > 
> > > > This year's Media Summit will be held on Tuesday May 26th the day before
> > > > the
> > > > Embedded Recipes Conference in Nice, France:
> > > > 
> > > > https://embedded-recipes.org/2026/
> > > > 
> > > > The Media Summit will be held at Hotel Campanile and in the same meeting
> > > > room
> > > > as last year (Nikaia):
> > > > 
> > > > https://nice-aeroport.campanile.com/en-us/
> > > > 
> > > > It is close to the Airport and to the Embedded Recipes venue.
> > > > 
> > > > The meeting room can hold up to 30 people and I will provide video
> > > > conferencing support,
> > > > just like last year. The location and the meeting room was quite nice last
> > > > year, so
> > > > I saw no need to change it.
> > > > 
> > > > That said, in-person participation is very much preferred. This yearly
> > > > summit is meant
> > > > for active media developers to meet face-to-face and to discuss media
> > > > subsystem issues.
> > > > 
> > > > And it is also a good opportunity to talk to each other during the
> > > > Embedded Recipes
> > > > conference to discuss topics in a smaller group. But if you are an active
> > > > media developer
> > > > and are really not able to attend in person, then remote participation is
> > > > an option.
> > > > 
> > > > If you want to attend the meeting (either in person or remote), then send
> > > > an email to me
> > > > directly. The deadline for in-person attendance is May 14 as the hotel
> > > > needs to know the
> > > > final number of attendees by then.
> > > > 
> > > > There is no registration fee, the meeting room is sponsored by Cisco and
> > > > Collabora, and
> > > > the lunch is sponsored by Ideas on Board! Many thanks to our sponsors,
> > > > it's very much
> > > > appreciated.
> > > > 
> > > > If you have a topic that you want to discuss, just 'Reply All' to this
> > > > announcement
> > > > and give the topic title, a short description and a guesstimate of the
> > > > time you need
> > > > for your topic.
> > > > 
> > > > See last year's Media Summit Report as an example of what to expect:
> > > > 
> > > > https://lore.kernel.org/linux-media/21769183-ca57-4f8f-818a-6a1ad089298d@jjverkuil.nl/
> > > > 
> > > > Regards,
> > > > 
> > > >         Hans
> > > > 
> > > > PS: Be aware that May 24 and 25 are public holidays in France. So many
> > > > shops may be
> > > > closed those days.
> > > > 
> > > > In-person attendees:
> > > > Sakari Ailus <sakari.ailus@linux.intel.com>
> > > > Kieran Bingham <kieran.bingham@ideasonboard.com>
> > > > Brandon Brnich <b-brnich@ti.com>
> > > > Rouven Czerwinski <rouven.czerwinski@linaro.org>
> > > > Mehdi Djait <mehdi.djait@linux.intel.com>
> > > > Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> > > > Nicolas Dufresne <nicolas.dufresne@collabora.com>
> > > > Marco Felsch <m.felsch@pengutronix.de>
> > > > Paul Kocialkowski <paulk@sys-base.io>
> > > > Jai Luthra <jai.luthra@ideasonboard.com>
> > > > Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> > > > Benjamin Mugnier <benjamin.mugnier@foss.st.com>
> > > > Beleswar Padhi <b-padhi@ti.com>
> > > > Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > > Loic Poulain <loic.poulain@oss.qualcomm.com>
> > > > Sven Püschel <s.pueschel@pengutronix.de>
> > > > Ricardo Ribalda <ribalda@chromium.org>
> > > > Michael Riesch <michael.riesch@collabora.com>
> > > > Devarsh Thakkar <devarsht@ti.com>
> > > > Michael Tretter <m.tretter@pengutronix.de>
> > > > Hans Verkuil <hverkuil@kernel.org>
> > > > 
> > > > Remote attendees:
> > > > Yemike Abhilash Chandra <y-abhilashchandra@ti.com>
> > > > Rishikesh Donadkar <r-donadkar@ti.com>
> > > > Jackson Lee <jackson.lee@chipsnmedia.com>
> > > > Dave Stevenson <dave.stevenson@raspberrypi.com> (tentative)
> > > > 
> > > > 
> > > > Agenda (tentative):
> > > > 
> > > > 8:45-9:20: Arrive, settle in
> > > > 
> > > > 9:20-9:30: Short intro (Hans Verkuil)
> > > > 
> > > > 9:30-9:45: Status of ISP support in V4L2
> > > >         Presenter: Laurent Pinchart
> > > >         Description: Summary of ISP-related development in V4L2 since the
> > > > last
> > > >         Linux Media Summit. This includes a brief overview of technical
> > > >         developments, and a summary of the efforts to engage with vendors.
> > > > 
> > > > 9:45-10:45: V4L2 Stateless Video Encoding uAPI Progress Update
> > > >         Presenter: Paul Kocialkowski
> > > >         Description: An update on the ongonig work to support stateless
> > > > codecs in V4L2.
> > > >         Some of the remaining open topics will be presented and discussed.
> > > > 
> > > > 10:45-11:00: break
> > > > 
> > > > 11:00-11:30: Vulkan Video Codecs
> > > >         Presenter: Nicolas Dufresne
> > > >         Description: Vulkan video codecs: what are the viable options for
> > > > Linux Media
> > > >         and what is in preparation outside of our subsystem. The second
> > > > aspect is
> > > >         informative as these discussions don't seem to lean toward our
> > > > subsystem as the
> > > >         foundation. But I think it's rather useful for everyone to
> > > > understand why and
> > > >         what is included.
> > > > 
> > > > 11:30-12:00: Protected Video playback on i.MX8MQ
> > > >         Presenter: Rouven Czerwinski
> > > >         Description: Introduction to protected video playback
> > > >         on i.MX8MQ and missing bits for linux-media & protected heap
> > > > interoperability.
> > > > 
> > > > 12:00-13:30: Lunch
> > > > 
> > > > 13:30-14:00: HDCP support for HDMI receivers
> > > >         Presenter: Hans Verkuil
> > > >         Description: I have been working on adding HDCP support for HDMI
> > > > receivers.
> > > >         Specifically the HDCP negotiation between sources and sinks.
> > > > 
> > > > 14:00-14:30: AI patches
> > > >         Presenter: Sakari Ailus
> > > >         Description: What is our policy w.r.t. AI generated patches?
> > > > 
> > > > 14:30-15:00 Overview of Media CI: where do pipelines run?
> > > >         Presenter: Ricardo Ribalda
> > > >         Description: How are jobs in pipelines assigned? How does the
> > > > infrastructure
> > > >         for Media CI work? Are there things that can be tweaked to make it
> > > > more
> > > >         reliable?
> > > > 
> > > > 15:00-15:15: Break
> > > > 
> > > > 15:15-16:15: Discussion of the media subsystem development process
> > > >         Presenter: Hans Verkuil
> > > >         Description: Review of the multi-committer model: current status
> > > > and next steps.
> > > >         Are there any bottlenecks, any ideas for improvements, w.r.t. the
> > > > development process?
> > > > 
> > > > As you can see, there is still some available time for other topics.

-- 
Regards,

Laurent Pinchart