Re: [ANN] Topics for a media summit in Lyon in October

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

Hi Eugen,

On Mon, Aug 19, 2019 at 03:24:26PM +0000, Eugen.Hristev@microchip.com wrote:
> On 19.08.2019 18:04, Laurent Pinchart wrote:
> > On Mon, Aug 19, 2019 at 11:43:56AM -0300, Ezequiel Garcia wrote:
> >> On Mon, 2019-08-19 at 09:44 +0200, 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 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 <acourbot@chromium.org>
> >>>> Tomasz Figa <tfiga@chromium.org>
> >>>> Jacopo Mondi <jacopo@jmondi.org>
> >>>> Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> >>>> Hans Verkuil <hverkuil@xs4all.nl>
> >>>>
> >>>> 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.
> >>>
> >>> Hans:
> >>>
> >>> Finalize the stateful encoder API. There are still two TODOs there, see:
> >>> https://patchwork.kernel.org/cover/10972783/
> >>
> >> A few Collaborans, including me will be attending.
> >>
> >> On my side, I'd like to discuss the staging stateless codec drivers
> >> and the conditions and requirements for them to move out of staging.
> > 
> > If time (and interest) permits, we could also discuss the next steps for
> > libcamera and their implications on the kernel side.
> > 
> > Is there any news regarding the date of the meeting ? Thursday after the
> > conference would be best for me, but if it's during the conference, I
> > could still attend part of the discussions (depending on the conference
> > schedule).
> > 
> 
> Hello,
> 
> I will be in Lyon and would love to attend. I am pretty much new to 
> media subsystem and eager to learn more about it.
> My interest is related to platform drivers and support for small ISPs 
> inside hardware controllers.

I would be very interested in discussing that topic with you, at any
time that would fit your schedule.

> P.S. Not sure if will be still there on Thursday or only Mon-Wed

-- 
Regards,

Laurent Pinchart