From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F3A02C234A for ; Fri, 22 May 2026 20:10:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779480621; cv=none; b=VB50O7KPtToCR6XSyCrLgpmotwyV4R+Xx/Es2zA8zEmNQqdzOHIB3jy5bR1CrZstGqECrIKDVu+lXyNOKWvXoMtLtdt7GYKwyhw+XaTncXxDt56xx11IxqYZxNLwGbe6clzGsvIsafnbDZbfb6+OwLIg/CAevwDu3UiBPpc+ipk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779480621; c=relaxed/simple; bh=EhQmK/BYecWV1E8b4V+9qxaLSle7KWLO915+SCVzZuY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=s4fieXjCvyLCz5f77qS/ozdXBieLCLKewpSYpqq6wgrhbll0s6g3gTVaVnVCvEzfE22g5M7XZvxTt5P8mQB9bJEzVaep+mLz3Jvfh7+9SUcCq8PL71HO73IAqolIyZtNF3iWbbdL9223V2r8UnG3Ehqsb2tNVTj5whybuEQQw10= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=iBwfqPHQ; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="iBwfqPHQ" Received: from ideasonboard.com (unknown [IPv6:2a01:cb1d:8f2:800:5c65:b7b4:ebe:1e71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id EA5CC447; Fri, 22 May 2026 22:09:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1779480592; bh=EhQmK/BYecWV1E8b4V+9qxaLSle7KWLO915+SCVzZuY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=iBwfqPHQgEWGewZ13qt8fbCpE3IU8c4ttTR2pE1vJg4xgE3HsEtKENQccVyi84cDQ 5vzC83xAHRA5ge9QxA1/OGznWIlrMHbWzwoGfgmo93D5xzOaVtVs1bJkNdmyVIn4Az FlFsLIwQPtNlKpfTMRcUiQZBbTRAZ4RNzb4aWrjI= Date: Fri, 22 May 2026 22:10:03 +0200 From: Jacopo Mondi To: Loic Poulain Cc: Nicolas Dufresne , Hans Verkuil , Jacopo Mondi , Laurent Pinchart , Michael Riesch , Ricardo Ribalda , Linux Media Mailing List , Mauro Carvalho Chehab , Sean Young , Sakari Ailus , Niklas =?utf-8?Q?S=C3=B6derlund?= , Tomi Valkeinen , Alain Volmat , Bryan O'Donoghue , Dave Stevenson , Daniel Almeida , Michael Tretter , Tomasz Figa , Steve Cho , Kieran Bingham , Kevin Hilman , Paul Kocialkowski , Benjamin Mugnier , Hans de Goede , Maxime Ripard , Brandon Brnich , Marco Felsch , Sven =?utf-8?Q?P=C3=BCschel?= , Devarsh Thakkar , Yemike Abhilash Chandra , Jackson Lee , Jai Luthra , Mehdi Djait , "Padhi, Beleswar" , "Donadkar, Rishikesh" , Rouven Czerwinski , Nayden Kanchev , Konstantin Babin , Anthony McGivern Subject: Re: [ANNv4] Media Summit on May 26th in Nice, France Message-ID: References: <420e20b3-4264-4ab0-bb50-1ae60f6c837a@collabora.com> <20260414074230.GB4061@killaraus.ideasonboard.com> <20260414084259.GC4061@killaraus.ideasonboard.com> <77ea77b9-5503-40b2-882b-e96e30028c43@kernel.org> <1182ce00f1c55cf28e13e6eb4f2e018b52a8f6a8.camel@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Hi Loic On Fri, May 22, 2026 at 09:49:34PM +0200, Loic Poulain wrote: > Hi Folks, > > On Tue, Apr 28, 2026 at 7:55 PM Nicolas Dufresne > wrote: > > > > Le mardi 28 avril 2026 à 15:00 +0200, Hans Verkuil a écrit : > > > On 4/28/26 14:30, Jacopo Mondi wrote: > > > > Hello > > > > > > > > On Tue, Apr 14, 2026 at 11:42:59AM +0300, Laurent Pinchart wrote: > > > > > On Tue, Apr 14, 2026 at 10:34:13AM +0200, Loic Poulain wrote: > > > > > > On Tue, Apr 14, 2026 at 9:42 AM Laurent Pinchart wrote: > > > > > > > On Tue, Apr 14, 2026 at 09:20:56AM +0200, Michael Riesch wrote: > > > > > > > > On 4/14/26 08:55, Ricardo Ribalda wrote: > > > > > > > > > On Tue, 14 Apr 2026 at 08:47, Hans Verkuil wrote: > > > > > > > > > > On 13/04/2026 23:16, Laurent Pinchart wrote: > > > > > > > > > > > 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. > > > > > > > > > > > > > > > > It seems that we share some pain points.. :-) :-/ > > > > > > > > > > > > > > > > Over the last year, some ideas have been brewing in my mind. Not > > > > > > > > necessarily *my* ideas, mind you, rather ideas that have been around in > > > > > > > > linux-media for quite a while, actually. What I would like to prepare > > > > > > > > for the Media Summit goes along the same lines. > > > > > > > > > > > > > > > > > > > > > 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. > > > > > > > > > > > > > > > > > > > > I'm available on Monday as well. I think this is a topic that is well suited > > > > > > > > > > to a brainstorm session. > > > > > > > > > > > > > > > > > > I am also available on Monday and would like to attend the session. > > > > > > > > > > > > > > > > I'd be interested too. Right now the plan is to arrive on Monday > > > > > > > > afternoon. Depending on what time you agree on it may work out anyway. > > > > > > > > It would be great to know the exact time this session will start (as I > > > > > > > > might need to adjust my travel arrangements). > > > > > > > > > > > > I can arrive on Monday, with a preference for the afternoon. > > > > > > > > > > > > > We need a volunteer to organize this, as in finding and booking a > > > > > > > meeting space. Note that Monday is a public holiday in France (Monday > > > > > > > the 25th of May in particular, not all Mondays). > > > > > > > > > > > > > > If the number of attendees was small I was thinking of hosting the event > > > > > > > in the place where the Ideas on Board team will be staying, but it looks > > > > > > > like we're already reaching a fair number of people. > > > > > > > > > > > > > > > Are we still considering this BoF session ? > > > > > > > > We would someone to volunteer organizing this, at @IoB we're quite > > > > full for the week and we might have an hard time organizing this one > > > > on top of the libcamera workshop. > > > > > > > > As Laurent said, that Monday is a public holiday in France, and > > > > getting a room somewhere might be complicated. > > > > > > > > We can host some people in the location where we're having the yearly IoB > > > > get-together, but you should arrange your travel there (35 minutes > > > > from Nice by car). > > > > > > > > If we get a volunteer we can should maybe a dedicated mail thread as this one > > > > was about the Media Summit ? > > > > > > If the number of people can be kept low (say <= 6), then it shouldn't be a > > > problem to just find a hotel restaurant or similar, close to the place of > > > the media summit, and just sit together. > > > > > > Who would be the key people for this? And who are 'nice to have'? :-) > > > I think I probably fit more in the latter category than the first. > > > > I was hoping a small number of people and a simple café/lobby too. The mass of > > people interested in the reply arrive much later, but I'm there all day, and > > would be more then happy to be able to brainstorm the subject a bit, which is > > easier in small group. > > Is this BoF side session still planned? If there’s still interest, > perhaps the easiest option would simply be to meet at the hotel lobby > on Monday morning. > I'm around Nice like many others on Monday, but I'm not sure how this would feel for people that didn't arrange their travels accordingly because this event was never officially announced. > Regards, > Loic >