wiki: Porting wiki: Porting Chat Log

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

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+2016-11-09 Multimedia group chat report
+
+We had a multimedia group meeting on 2016-11-09. Here's a summary of the 
+discussions. Please correct any mistake you would notice.
+
+Attendees:
+
+- Kieran
+- Laurent
+- Morimoto-san
+- Niklas
+
+Magnus and Ulrich were absent.
+
+
+Topic 1. Status check for the multimedia tasks
+----------------------------------------------
+
+* Kieran
+
+Since last meeting:
+
+- VSP1 writeback prototype submitted
+
+Frames can be successfully grabbed from the V4L2 video node. Awaiting reviews 
+on DRI/media lists.
+
+- Partition Algorithm improvements posted
+
+Still need to see if/how display list objects can be reused.
+
+For the next two weeks:
+
+- Start on Q4/2 tasks
+and/or
+- Try to reuse display lists for VSP partitions
+
+Issues and Blockers: None
+
+
+* Laurent
+
+Since last meeting:
+
+- Attended Kernel Summit and Linux Plumbers Conference
+
+Posted a few reports on the periperi mailing list on topics of interest for 
+the upstreaming team. No more report planned, but please feel free to ask 
+questions.
+
+For the next two weeks:
+
+- Follow up on the LVDS mode selection patches.
+- Post a proposal for the rotation and histogram APIs.
+- Post a few misc DU and VSP patches forward-ported from the BSP.
+
+Issues and Blockers:
+
+
+* Morimoto-san
+
+Since last meeting:
+
+- Posted HDMI+sound patch.
+- Posted ALSA SoC OF-graph base patch-set.
+- Posted ALSA SoC framework cleanup patch-set.
+
+All the above are under review.
+
+- Worked on BSP team sound issue
+- M3 board export paper work for new guys
+
+For the next two weeks:
+
+- Follow up on the posted patches
+
+Issues and Blockers:
+
+- American people seem to have selected Mr. Trump.
+
+
+* Niklas
+
+Since last meeting:
+
+- Posted new rewritten VIN Gen3 driver (uses media controller 
+framework) with M3-W support and a refreshed CSI2 driver.
+
+- Got a VIN->DU test-case working on Gen2 and Gen3
+
+A VIN tests repository has been created at https://git.ragnatech.se/vin-tests/. Jacopo is also working on a buffer sharing test application that will 
+support VIN, VSP and DU, we'll likely merge both.
+
+HDMI loopback should be used for more automated testing, but it's too early 
+for Gen3. We'll revisit the topic later.
+
+For the next two weeks:
+
+- Address the review comments on the VIN and CSI2 driver.
+
+Issues and Blockers: None
+
+
+Topic 2. Additional tasks for Q4/2 2016
+---------------------------------------
+
+SoWs haven't been finalized yet, but should hopefully be by the end of the 
+week. At this time it looks like we'll have the following tasks.
+
+- VSP1 race conditions fixes, VSP suspend/resume (Gen2 only, Gen3 requires 
+more work due to FCP dependency) and Gen3 HDMI output for Kieran
+
+- Gen3 HDMI output and V4L2 cache management API (upstream discussions only, 
+actual implementation likely in 2017/Q1) for Laurent
+
+- Nothing for Niklas as all his time will be consumed by other groups)
+
+- IPMMU multimedia development (including DU horizontal lines issue) for 
+Ulrich. Help from the hardware team might be needed, we don't know whether the 
+issue is caused by software or hardware.
+
+In parallel Jacopo is working as a trial task on a test application to measure 
+performances issues, and performance improvements when patches will be ready.
+
+Fences support isn't planned for Q4 at this time, but will be built on top of 
+V4L2 fences support that Collabora is working on, likely in 2017/Q1.
+
+
+Topic 3. Next meeting
+---------------------
+
+The next meeting will be held on 2016-11-23 at 08:00 GMT / 09:00 CET / 10:00 
+EET / 17:00 JST.
+
+h1. Multimedia-chat-meeting-2016-11-09
+
+<neg> morning  [16:59]
+<pinchartl> hello
+<horms> hi pinchartl, i will be lurking this morning if you don't mind  [17:00]
+<pinchartl> no worries  [17:01]
+<morimoto> hi
+<kbingham> Morning all.
+<pinchartl> Magnus told me 15 minutes ago he was going back home so I assume
+	    he won't join  [17:02]
+<pinchartl> let's wait a few minutes for Ulrich
+<pinchartl> neg: you thus have a few minutes to send your report by e-mail
+								        [17:03]
+<neg> :-)  [17:05]
+<pinchartl> let's get started  [17:06]
+<pinchartl> topics for today
+<pinchartl> - Status check for the multimedia tasks
+<pinchartl> - Additional tasks for Q4/2 2016
+<pinchartl> anything else ?  [17:07]
+<neg> not that I can think of
+<pinchartl> kbingham: you can start  [17:08]
+<pinchartl> kbingham: it was both a permission and a request :-)  [17:09]
+<kbingham> A) - I've posted a series for review to implement a prototype
+	   writeback extension to VSP1. Frames can successfully be grabbed
+	   using V4L2 interfaces from the established video node.
+<kbingham> hehe
+<kbingham> I've also posted a couple of changes to the partition-algorithm to
+	   move some of the calculations to stream on - rather than on every
+	   frame - and provide better restrictions to match the hw
+	   restrictions for the partition-algorithm  [17:10]
+<kbingham> I've also been playing with ways to try to re-use DL objects - but
+	   that's still a WIP set ...  [17:11]
+<kbingham> B) - whilst lacking in budget - I will either start on Q4/2 tasks -
+	   or carry on playing with DL's  - or continue working to convert my
+	   garage office :)  [17:12]
+<kbingham> C) No particular blockers currently.
+<pinchartl> I think starting with Q4/2 tasks makes sense, let's discuss that
+	    together after this meeting
+<kbingham> Ack :)  [17:13]
+<kbingham> That's me done then ! :-)
+<pinchartl> thank you
+<pinchartl> my turn
+<pinchartl> I've attended the kernel summit and the Linux Plumbers Conference
+								        [17:14]
+<pinchartl> I've posted a few reports on the periperi mailing list on topics
+	    of interest for us
+<horms> pinchartl: thanks for your report on s2ram
+<pinchartl> I don't plan to post any additional report, but if you have
+	    specific questions, please ask
+<pinchartl> horms: you're welcome
+*** neg_ (~neg@unaffiliated/neg) has joined channel #periperi  [17:15]
+*** neg (~neg@unaffiliated/neg) has quit: Quit: Reconnecting
+*** neg_ (~neg@unaffiliated/neg) is now known as neg
+<pinchartl> for the next two weeks I plan to follow up on LVDS mode selection
+	    (I've received a few replies)  [17:16]
+<pinchartl> post a proposal to the V4L2 mailing list to try and move forward
+	    on VSP rotation and histogram API
+<pinchartl> and post a few misc patches ported from the BSP for the VSP and DU
+	    drivers
+<pinchartl> no issue or blocker  [17:17]
+<pinchartl> morimoto: you're next
+<morimoto> I'm very glad to start, my lord !
+<morimoto> A) What have I done since last time  [17:18]
+<morimoto>   1) I posted HDMI+sound patch to ML.
+<morimoto>   2) I posted ALSA SoC OF-graph base patch-set.
+<morimoto>   3) I posted ALSA SoC framework cleanup patch-set. 
+<morimoto> these are all under review now
+<morimoto> 
+<morimoto>   a) I worked for BSP team sound issue
+<morimoto>   b) M3 board export paper work for new guys
+<morimoto> B) What I plan to do till next time
+<morimoto>  - continue to post patches
+<morimoto> C) Problems I have currently
+<morimoto>  - American people seems selected Mr.Trump.
+<morimoto> --end--
+* horms falls of chair
+<pinchartl> regarded the OF-graph implementation, I think you've replied to
+	    John Stulz about his ADV7511 HDMI sound patch series, right ?
+								        [17:19]
+<pinchartl> s/regarded/regarding/
+<morimoto> Yes, I think so (I forgot his name, though)
+<pinchartl> I briefly talked to him at LPC  [17:20]
+<pinchartl> you're the expert on OF graph for sound :-)
+<pinchartl> but please let me know if I should try to spend more time on those
+	    patches
+<morimoto> for DT review ?  [17:21]
+<pinchartl> yes
+<morimoto> If he can follow my OF-graph base HDMI sound DT, he should wait
+								        [17:22]
+<morimoto> because my patch-set is not yet accepted.
+<morimoto> there is no responce form OF maintainer (= Rob) 
+<morimoto> s/form/from/
+<pinchartl> do you think he should wait, or use non OF-graph DT bindings ?
+								        [17:23]
+<morimoto> I think HDMI should use OF-graph DT, and this is your opinion,
+	   right ?
+<pinchartl> yes  [17:24]
+<pinchartl> thanks for the confirmation
+<pinchartl> neg: your turn  [17:25]
+<neg> A)
+<neg>  - Posted new rewritten VIN Gen3 driver (uses the media controller
+      framework) with M3-W support and a refreshed CSI2 driver
+<neg>  - Got a VIN->DU test-case working on Gen2 and Gne3 \o/
+<morimoto> pinchartl: your welcome
+<neg> B) Address the review comments on the VIN and CSI2 driver
+<neg> C) None
+<pinchartl> nice work for VIN -> DU  [17:26]
+<pinchartl> it would make sense to add that to a test suite
+<pinchartl> I wonder which one though
+<pinchartl> maybe a new one ?
+<pinchartl> Jacopo is working on a test application for buffer sharing that
+	    will also support the VSP
+<pinchartl> so merging the two would make sense  [17:27]
+<neg> yes I have started on a vin-tests repo at
+      https://git.ragnatech.se/vin-tests/
+<pinchartl> what do you think ?
+<neg> but it's quiet inmature and could use a lot more work
+<neg> yes I spoken a bit with Jacopo and I hope it could be a good fit for
+      incorperating the VIN->DU test case  [17:28]
+<pinchartl> VSP tests were easier as they're self-contained
+<pinchartl> but VIN unit tests would definitely be useful
+<pinchartl> let's keep this in mind for now, it's a bit too early to decide
+	    what to do there  [17:29]
+<pinchartl> especially for Gen3
+<neg> yes, maybe down the road a HDMI loopback could be used for some
+      automated testing
+<neg> it would be usefull so yes lets keep that in mind  [17:30]
+<pinchartl> that's what I was thinking about
+<pinchartl> next topic, additional tasks for Q4/2  [17:31]
+<pinchartl> SoWs have still not been finalized, but we're getting close
+	    (hopefully by the end of this week)  [17:32]
+<pinchartl> in addition to what has already been proposed, Renesas requested
+	    Kieran to help with the HDMI output upstreaming for Gen3
+								        [17:33]
+<morimoto> for next additional ?
+<pinchartl> for second half of Q4
+<morimoto> OK
+<kbingham> pinchartl: OK.  [17:34]
+<pinchartl> does anyone have anything they would like to discuss ?
+<kbingham> pinchartl: Is there an existing branch/patchset somewhere?
+<pinchartl> kbingham: yes, let's sync up after the meeting  [17:35]
+<kbingham> Ok.
+<morimoto> pinchartl: can I confirm (?)
+<morimoto> this is not related to additional, but will be additional
+<pinchartl> I'm not sure to understand the difference :-)  [17:36]
+<morimoto> do you have plan for "cache less" task ?
+<pinchartl> yes, I'll start discussions on V4L2 API extensions for that
+								        [17:37]
+<pinchartl> in parallel Jacopo is working on a test application to measure
+	    performances issues
+<pinchartl> and performance improvements, when patches will be ready
+<pinchartl> that's all for Q4/2  [17:38]
+<pinchartl> note that only API discussions are planned for Q4/2, the actual
+	    implementation will likely be in 2017/Q1
+<morimoto> OK, nice to know. and how about "Fence" ?
+<pinchartl> fences support isn't planned yet, it will likely be for 2017/Q1
+<morimoto> OK  [17:39]
+<pinchartl> Collabora will likely post patches to add fence support in V4L2 in
+	    the next few months
+<pinchartl> so the plan is to do something else until they have posted those
+	    patches, and add fence support to the VSP driver on top of them
+<pinchartl> to avoid duplicating the work
+<morimoto> OK, nice plan  [17:40]
+<morimoto> How about "horizontal bug" ?
+<pinchartl> the IPMMU issue ?
+<morimoto> Maybe
+<pinchartl> Ulrich will look at that, again for Q4/2
+<morimoto> I wonder does he need Renesas HW guy's help ?  [17:41]
+<morimoto> is it HW issue ? or SW issue ?
+<pinchartl> that's a good question
+<pinchartl> I don't know at this point
+<morimoto> OK, I will talk with BSP team about it.  [17:42]
+<pinchartl> thanks
+<morimoto> and last question. do you have plan about suspend/resume bug fix ?
+<morimoto> vsp1_pm_suspend()
+<morimoto> Oops, it need normal suspend/resume base. maybe next year ?  [17:43]
+<horms> pinchartl: i have two questions if there is time at the end  [17:44]
+<pinchartl> Kieran will look at that for Q4/2 on Gen2. for Gen3 we neeed
+	    additional suspend/resume core work, that will be for 2017/Q1
+<kbingham> pinchartl: You know I don't have any G2 hardware right :D  [17:45]
+<pinchartl> kbingham: good point :-) it can be emulated on Gen3 though, with a
+	    small hack to make sure the FCP won't be suspended at the wrong
+	    time  [17:46]
+<pinchartl> the point isn't so much to work on Gen2 but to fix the issues
+	    internal to the VSP driver
+<kbingham> Ok!
+<pinchartl> the suspend/resume issues caused by the dependency on FCP are out
+	    of scope at this time  [17:47]
+<pinchartl> horms: go ahead  [17:48]
+<horms> 1. How does Jacopo fit into things? Is he working with us these days?
+<pinchartl> he's working on a trial task
+<horms> ok, thanks.  [17:49]
+<pinchartl> his task is to write a buffer sharing application
+<pinchartl> and we'll use it to measure performance issues and improvements
+	    related to cache management
+<horms> 2. I am wondering what the status of your upporting from BSP work
+	is. Mainly because as you know its reporting season and I'd like to be
+	sure I have any pending updates in my report.
+<pinchartl> I have to send a report about that by 11/M  [17:50]
+<horms> ok, I got a patch from him last week. I wasn't aware he was on our
+	team. Its good to know.
+<pinchartl> I'll submit the simple patches
+<pinchartl> and will list areas that need more work
+<pinchartl> based on the spreadsheet that you provided
+<horms> superb, thanks
+<horms> fwiw kaneko san will start analysing the 3.4.0.rc1 BSP  [17:51]
+<pinchartl> by the way, the spreadsheets hosted on google docs and attached in
+	    the osdr wiki are different
+<pinchartl> that's a bit confusing
+<horms> which iirc was released last week
+<horms> ok
+<horms> i'll look into that
+<horms> probably best to delete the copy in the wiki as the google one keeps
+	changing
+<pinchartl> sounds good to me  [17:52]
+<morimoto> According to Renesas guys, you can buy ULCB board by AMAZON (Now
+	   Gen2, Gen3 soon). I didn't check yet
+<horms> thanks, that is also good to know  [17:53]
+<morimoto> pinchartl: +1 question. Is HDMI out upstreaming for long-term ?
+								        [17:54]
+<morimoto> I mean it takes long-term ?
+<pinchartl> the idea is to post a patch series for upstreaming before the end
+	    of the year
+<pinchartl> it might not contain all features
+<pinchartl> but it should be an upstream candidate, with no known local hacks
+								        [17:55]
+<morimoto> what is the difference between Ulrich's prototype ?
+<horms> pinchartl: which link are you referring to on the wiki?
+<pinchartl> the prototype contains hacks
+<pinchartl> I'll clean that up to make it all upstreamable
+<morimoto> Ahh, OK. 
+<pinchartl> horms:
+	    https://osdr.renesas.com/projects/linux-kernel-development/wiki/Miniperi-2016-10
+								        [17:56]
+<pinchartl> there's a bsp_patch_list_20160930.xlsx file attached there
+<horms> ok, i see
+<horms> that is the list generated by the BSP team  [17:57]
+<pinchartl> ok  [17:58]
+<pinchartl> I've used that as a starting point  [17:59]
+<pinchartl> next topic: next meeting
+<pinchartl> I proposed two weeks from now
+<pinchartl> at the same time
+<pinchartl> 2016-11-23 at 08:00 GMT / 09:00 CET / 10:00  [18:00]
+<pinchartl> EET / 17:00 JST
+<neg> that works for me
+<kbingham> should be fine here.  [18:01]
+<pinchartl> approved :-)
+<pinchartl> I propose adjourning this meeting
+<pinchartl> does anyone second ?
+<neg> second  [18:02]
+<pinchartl> thank you everybody for attending
+<kbingham> Have a good day all!
+<neg> thanks all, bye
+<pinchartl> :q  [18:04]
+<pinchartl> oops :-)
+<morimoto> bye