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From: Hans Verkuil <>
To: Linux Media Mailing List <>
Cc: Alexandre Courbot <>,
	Laurent Pinchart <>,
	Jacopo Mondi <>,
	Tomasz Figa <>
Subject: [ANN] Topics for a media summit in Lyon in October
Date: Fri, 16 Aug 2019 10:06:30 +0200
Message-ID: <> (raw)

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 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:


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.


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?


If Collabora/Bootlin is there, I'd certainly want to discuss stateless
codecs, in particular m2m codec helpers and finalize the specification
in general.



             reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16  8:06 Hans Verkuil [this message]
2019-08-16  8:10 ` Hans Verkuil
2019-08-16  8:22   ` Tomasz Figa
2019-08-16  8:31     ` Hans Verkuil
2019-08-16  9:37 ` Mauro Carvalho Chehab
2019-08-19  7:44 ` Hans Verkuil
2019-08-19 14:43   ` Ezequiel Garcia
2019-08-19 15:04     ` Laurent Pinchart
2019-08-19 15:24       ` Eugen.Hristev
2019-08-19 15:51         ` Laurent Pinchart
2019-08-28 10:55 ` Hans Verkuil
2019-08-29  0:56   ` Nicolas Dufresne
2019-08-30  7:53   ` Tomasz Figa
2019-09-03  7:21   ` Hans Verkuil
2019-09-03  7:46     ` Alexandre Courbot
2019-09-03  8:02     ` Tomasz Figa
2019-09-03  9:15     ` Niklas Söderlund
2019-09-03  9:35     ` Laurent Pinchart
2019-09-03 10:03       ` Hans Verkuil
2019-09-12  7:28     ` Michael Tretter
2019-09-13 11:27     ` Hans Verkuil
2019-09-13 12:24       ` Daniel Gomez
2019-09-16  8:40 ` Jose Abreu
2019-09-16  8:48   ` Hans Verkuil
2019-09-16  9:54     ` Laurent Pinchart
2019-09-16 10:39       ` Angelo Ribeiro
2019-09-16 10:51         ` Laurent Pinchart
2019-09-16 12:51           ` Angelo Ribeiro

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