wiki: Porting wiki: Porting Chat Log

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

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+Multimedia-chat-meeting-2019-01-24
+
+10:06 < pinchartl> welcome to the multimedia meeting !
+10:07 < pinchartl> Topic 1. Status Check for the Multimedia Tasks
+10:07 < pinchartl> * Jacopo
+10:07 < pinchartl> Since last meeting:
+10:07 < pinchartl> - adv748x dynamic routing v4 merged
+10:07 < pinchartl> - soc_camera removal - small help to finalize removal
+10:07 < pinchartl> Until next meeting:
+10:07 < pinchartl> - Update vin-tests for the CSVB->TXA use case on E3
+10:07 < pinchartl> - Propose a V4L2 API to dynamically negotiate the number of CSI-2 data lanes
+10:07 < pinchartl> This should be discussed with Sakari first.
+10:07 < pinchartl> - FOSDEM and meetings
+10:07 < pinchartl> Issues and blockers: None
+10:07 < pinchartl> jmondi: any comment ?
+10:07 < jmondi> not really
+10:08 < pinchartl> thank you
+10:08 < pinchartl> * Kieran
+10:08 < pinchartl> Since last meeting:
+10:08 < pinchartl> - ADV748x upstreaming/ refactor reset routine, and remote PAGE_WAIT
+10:08 < pinchartl> - GMSL v5 review updates, rebase, and fixes for renesas-drivers
+10:08 < pinchartl> Until next meeting:
+10:08 < pinchartl> - Post GMSL v5
+10:08 < pinchartl> - DU D3/E3 support review
+10:08 < pinchartl> - Attend PeriPeri Meetings in Brussels and FOSDEM
+10:08 < pinchartl> - Continue on Upporting
+10:08 < pinchartl> Issues and blockers:
+10:08 < pinchartl> - Development laptop failure resulted in a re-install of Ubuntu OS :(
+10:08 < pinchartl> kbingham: any comment ?
+10:08 < kbingham> none here.
+10:09 < pinchartl> thank you
+10:09 < pinchartl> * Laurent
+10:09 < pinchartl> Since last meeting:
+10:09 < pinchartl> - Updated ATF & U-Boot on Salvator-XS M3-N and Draak (was quite painful)
+10:09 < pinchartl> - D3/E3 RGB output (complete, pending review)
+10:09 < pinchartl> - Reviewed multiplexed streams series
+10:09 < pinchartl> Until next meeting:
+10:09 < pinchartl> - Skiing holidays
+10:09 < pinchartl> - FOSDEM & multimedia meeting
+10:09 < pinchartl> Issues and blockers:
+10:09 < pinchartl> - Updating ATF and U-Boot was painful
+10:09 < pinchartl> Locating the right version of Minimon and the right memory locations is not
+10:09 < pinchartl> straightforward. While it is nice to have firmware packages in the wiki for
+10:09 < pinchartl> some of the boards, centralizing the information on how to obtain Minimon for
+10:09 < pinchartl> each board and where to flash the various components would be useful.
+10:09 < pinchartl> any question ?
+10:09 < morimoto> Skiing holidays
+10:09 < morimoto> where ?
+10:10 < pinchartl> very good question :)-
+10:10 < pinchartl> https://www.valdisere.com/
+10:10 < kbingham> morimoto, We still need a snowboarding holiday! :)
+10:10 < pinchartl> in the French Alps
+10:11 < morimoto> kbingham: Yeah, I think so
+10:11 < morimoto> PeriPeriSki meeting
+10:11 < kbingham> :)
+10:11 < morimoto> pinchartl: looks nice. Enjoy
+10:12 < pinchartl> thank you, I will try to
+10:12 < pinchartl> * Morimoto-san
+10:12 < pinchartl> Since last meeting:
+10:12 < pinchartl> - Investigated ALSA SoC cleanup
+10:12 < pinchartl> It is time to final cleanup for ALSA SoC. Initial investigations are done and
+10:12 < pinchartl> discussed with the maintainer.
+10:12 < pinchartl> Until next meeting:
+10:12 < pinchartl> - Continue ALSA SoC work
+10:12 < pinchartl> Issues and Blockers: None
+10:12 < pinchartl> morimoto: any comment ?
+10:12 < morimoto> no comment, thanks
+10:12 < pinchartl> thank you
+10:12 < pinchartl> * Niklas
+10:12 < pinchartl> Since last meeting:
+10:12 < pinchartl> - Investigated new LOCKDEP warnings in rcar-vin
+10:12 < pinchartl> Had a brief look of new fun LOCKDEP warnings due to the v4l2-async core
+10:12 < pinchartl> rework, rcar-vin async callback changes fallout. No clear conclusion so far.
+10:12 < pinchartl> Until next meeting:
+10:12 < pinchartl> - Try to solve the LOCKDEP warning in rcar-vin
+10:12 < pinchartl> - Try to clean up VIN crop and compose code
+10:12 < pinchartl> This is needed to to make it easier to merge UDS and PM support.
+10:12 < pinchartl> - Attend periperi meetings and FOSDEM.
+10:12 < pinchartl> Issues and blockers:
+10:12 < pinchartl> - I will be in Brussels from the Jan 29th -- Feb 10th, I expect this
+10:12 < pinchartl>   will effect my output.
+10:12 < pinchartl> neg: any comment ?
+10:13 < neg> No additional comment
+10:13 < pinchartl> thank you
+10:13 < pinchartl> any other comment or question from anyone regarding the status updates ?
+10:15 < pinchartl> Topic 2. Questions from the BSP team
+10:15 < pinchartl> - DRM render node support
+10:15 < pinchartl> The BSP team was informed by Igalia that R-Car doesn't have DRM render node [1][2]
+10:15 < pinchartl> support. Igalia is working on Chromium support, and Chromium uses render nodes to
+10:15 < pinchartl> separates the UI process and the GPU rendering for speed-up.
+10:15 < pinchartl> [1] https://en.wikipedia.org/wiki/Direct_Rendering_Manager#Render_nodes
+10:15 < pinchartl> [2] https://01.org/linuxgraphics/gfx-docs/drm/drmExternals.html
+10:15 < pinchartl> Tomohito Esaki from Igel has created a "quick hack" solution and provided a test
+10:15 < pinchartl> application. The BSP team would like to know our opinion.
+10:15 < pinchartl> morimoto: this may be a stupid question, but
+10:15 < pinchartl> the DU doesn't have rendering support, as we have a separate GPU for that
+10:16 < pinchartl> why would the DU driver need to create a render node when it can't do rendering ? :-)
+10:16 < pinchartl> the GPU node should create the buffers, and they should be imported by the DU driver normally
+10:16 < pinchartl> the render node API shouldn't be needed for that
+10:16 < morimoto> "DU doesn't have rendering support" = "HW" or "SW " ? I think "SW"
+10:17 < pinchartl> neither
+10:17 < pinchartl> the DU can compose multiple planes
+10:17 < pinchartl> but the DU hardware can't do rendering, it's not a GPU
+10:18 < pinchartl> so there's no rendering support in the driver because there's no rendering support in the hardware :-)
+10:18 < damm> Can IMR do rendering?
+10:18 < morimoto> Ahh, OK, thanks. I was misunderstanding
+10:18 < pinchartl> damm: IMR does some kind of rendering
+10:19 < pinchartl> as such it would be nice to support it with a DRM driver (and that would create a render node)
+10:19 < pinchartl> but it seems that the direction that was chosen was to use V4L2 instead
+10:19 < pinchartl> for the GPU I certainly hope V4L2 won't be used :-)
+10:19 < damm> i think the input from the m/m group leader is highly regarded
+10:19 < pinchartl> but DRM may not either, and that's out of our control
+10:20 < pinchartl> I commented on that in the past I believe
+10:20 < pinchartl> I think that was when Cogent posted IMR patches
+10:20 < pinchartl> (I'd have to check though, it was a long time ago)
+10:20 < morimoto> [PATCH v5] media: platform: Renesas IMR driver
+10:20 < morimoto> > https://lore.kernel.org/linux-renesas-soc/20170309200818.786255823@cogentembedded.com/
+10:20 < morimoto> ?
+10:20 < damm> gotcha. thanks
+10:22  * kbingham likes that lore is getting good use :)
+10:22 < pinchartl> morimoto: that driver, yes. I think I commented on a previous version
+10:22 < geertu> Sergei plans to work on v6 soon
+10:23 < morimoto> soon. OK thanks. Nice to know
+10:23 < morimoto> pinchartl: Thanks. I will feedback this info to BSP team
+10:23 < kbingham> https://lore.kernel.org/linux-renesas-soc/1770632.4GFlW6r2cg@avalon/
+10:23 < morimoto> s/this/these/
+10:25 < morimoto> kbingham: thanks
+10:25 < kbingham> pinchartl, https://lore.kernel.org/linux-renesas-soc/15d3888d-e15c-db23-27b4-51d5e2840618@cogentembedded.com/ Konstantin replied saying the name "image renderer is misguiding"
+10:25 < pinchartl> it's a bit of a borderline case, depending on whether you think it performs texture rendering, or lens distortion correction
+10:26 < geertu> The former is more generic than the latter
+10:27 < geertu> Can the latter be implemented on top of the former?
+10:27 < pinchartl> possibly, depending on lots of details
+10:28 < pinchartl> the use case here, if I understand correctly, is to create the bird-eye-view from four fish-eye cameras
+10:28 < pinchartl> so it doesn't just do lens distortion correction
+10:28 < pinchartl> it actually creates distortion, just the other way around :-)
+10:29 < kbingham> sounds like texture rendering onto a sphere :)
+10:30 < wsa_> oh, we do this on c64, too
+10:31 < pinchartl> LOL
+10:31 < pinchartl> in any case, render nodes shouldn't be needed for the DU as far as I can tell
+10:31 < geertu> wsa_: On Amiga, I used the copper for that (only in one dimension, or helix scrolls)
+10:31 < geertu> s/or/for/
+10:31 < pinchartl> Topic 3. peripericon @FOSDEM 2019
+10:32 < pinchartl> the multimedia meeting will be on Tuesday 2019-02-05 from 09:00 to 12:00
+10:32 < wsa_> geertu: so, the copper needs render-nodes then? :)
+10:33 < geertu> wsa_: No, it doesn't render, it's just a step in the display output pipeline
+10:35 < pinchartl> the current agenda is
+10:35 < pinchartl> - Up-port status and planning
+10:35 < pinchartl> - Planning for the next quarters
+10:35 < pinchartl> if you have any other topic to propose, you can submit them here, or reply to the group chat report e-mail later
+10:35 < pinchartl> any other topic to discuss for today ?
+10:35 < neg> Not from me
+10:37 < wsa_> jmondi: please send the preparational material for IO discussion soon
+10:37 < jmondi> wsa_: sure, it's on my list for next week
+10:37 < jmondi> would you like it before, like tomorrow?
+10:37 < wsa_> actually, yes
+10:38 < wsa_> I would like at least some days to really prepare
+10:38 < jmondi> I actually would then
+10:38 < jmondi> s/would/will
+10:38 < wsa_> and give other people also time to prepare
+10:38 < pinchartl> if there's no other question or topic, I proposed adjourning this meeting. does anyone second ?
+10:38 < jmondi> I see... will do
+10:38 < jmondi> seconded
+10:39 < damm> thanks guys, see ya later
+10:39 < wsa_> jmondi: thanks
+10:39 < jmondi> wsa_: long overdue
+10:40 < pinchartl> meeting adjourned
+10:40 < pinchartl> thank you all for attending, and have a great day