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[46.59.93.159]) by smtp.gmail.com with ESMTPSA id z72sm665015ljb.98.2019.09.03.02.15.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Sep 2019 02:15:46 -0700 (PDT) Date: Tue, 3 Sep 2019 11:15:45 +0200 From: Niklas =?iso-8859-1?Q?S=F6derlund?= To: Hans Verkuil Cc: Linux Media Mailing List , Alexandre Courbot , Laurent Pinchart , Jacopo Mondi , Tomasz Figa , Ezequiel Garcia , Eugen Hristev , Paul Kocialkowski , Maxime Ripard , Stanimir Varbanov , Philipp Zabel , Dafna Hirschfeld , Jernej =?utf-8?Q?=C5=A0krabec?= , Jonas Karlman Subject: Re: [ANN] Topics for a media summit in Lyon in October Message-ID: <20190903091545.GF8086@bigcity.dyn.berto.se> References: <010ba9ce-bac9-6f0c-f128-4f163a7d8ea7@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Hans, Thanks for organizing this. On 2019-09-03 09:21:43 +0200, Hans Verkuil wrote: > Hi all, > > I've decided to hold the meeting during the ELCE and not on Thursday. > Two key people can't be there on Thursday and some travel back Thursday > evening and so would have to leave early. > > Looking at the schedule I propose instead to have one meeting on > Tuesday morning concentrating on finalizing the codec support. > > On Wednesday we have a second meeting for libcamera (morning) and looking > at future V4L2 developments such as v4l2_ext_buffer/format, Request API and > complex camera pipelines (afternoon). > > Laurent, it would make sense if you or one of the other libcamera devs is > 'chairing' the libcamera meeting. Do you agree? If so, can you prepare an > agenda for that meeting? > > I plan on leaving Thursday afternoon, so we have the option to continue the > talks around that last topic on Thursday morning. > > I have no idea where we will hold these meetings since I've no idea > what the conference center looks like and if they have suitable places > for doing something like this. So I'll look around on the Monday and > mail the details of where to meet then. > > Confirmed attendees: > > Boris Brezillon > Alexandre Courbot > Nicolas Dufresne > Tomasz Figa > Ezequiel Garcia > Eugen Hristev > Paul Kocialkowski > Helen Koike > Jacopo Mondi > Laurent Pinchart > Hans Verkuil > > If you are not on this list, but want to join, please let me know. I will be there. > > Since this is really three half-day meetings, each with a different > topic, please let me know which of those half-day meetings you want > to attend. > > Regards, > > Hans > > On 8/28/19 12:55 PM, Hans Verkuil wrote: > > On 8/16/19 10:06 AM, Hans Verkuil wrote: > >> Rather then discussing topics for a meeting under the subject 'Lisbon' > >> let's start a new thread referring to the right place :-) > >> > >> I will try to organize a room, either during the ELCE or (if that doesn't > >> work) perhaps on the Thursday afterwards. If that's going to be a problem > >> for someone, please let me know. > > > > I can only get a room for Thursday afternoon (2pm-6pm). I'm inclined to take > > that room, but if a lot of people who want to come, will already have left > > on the Thursday, then there is no point in me reserving this room. > > > > So if you are unable to attend on Thursday, then please let me know asap! > > > > If Thursday is no problem, then I wanted to have more informal meetings > > somewhere in the conference center during the morning, and after lunch > > use the room. > > > > If Thursday is a no-go, then we will just have to find a place inside > > the conference center during the ELCE. > > > > Regards, > > > > Hans > > > >> > >> I do need to know how many people I can expect. I have the following > >> confirmed attendees (and please reply if you are not listed!): > >> > >> Alexandre Courbot > >> Tomasz Figa > >> Jacopo Mondi > >> Laurent Pinchart > >> Hans Verkuil > >> > >> I know there were more who mentioned on irc that they would attend, > >> but it is easier to keep track if I have it in an email. > >> > >> Topics posted under the previous thread: > >> > >> Tomasz: > >> > >> I would want to discuss various v4l2_buffer improvements, e.g. > >> - DMA-buf import with plane offsets, > >> - unifying the buffer structs for M and non-M formats, > >> - ability to import different FDs with offsets for non-M formats if the > >> layout matches driver expectations, etc. > >> > >> Besides that, I would be interested in the general idea on handling > >> complex cameras in the Linux kernel in spite of the remaining V4L2 > >> limitations, e.g. > >> - combinatorial explosion of /dev/video nodes, > >> - significant ioctl overhead, > >> - huge amount of historical legacy making the driver and userspace > >> implementations overly difficult and prone to repetitive mistakes, > >> - the above also limiting the flexibility of the API - formats, frame > >> rates, etc. set using distinct APIs, not covered by Request API, with > >> non-failure "negotiation hell", etc. > >> - lack of fences, etc. > >> > >> Jacopo: > >> > >> Apart from discussing libcamera and hope we could kickstart a review of > >> its API, I would like to re-start discussing multiplexed stream support, > >> but that would require Sakari to be there, something I'm not certain > >> about. Sakari? > >> > >> Alexandre: > >> > >> If Collabora/Bootlin is there, I'd certainly want to discuss stateless > >> codecs, in particular m2m codec helpers and finalize the specification > >> in general. > >> > >> Regards, > >> > >> Hans > >> > > > -- Regards, Niklas Söderlund