diff options
Diffstat (limited to 'wiki/2018-02-periperi.wiki')
| -rw-r--r-- | wiki/2018-02-periperi.wiki | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/wiki/2018-02-periperi.wiki b/wiki/2018-02-periperi.wiki new file mode 100644 index 0000000..22314d8 --- /dev/null +++ b/wiki/2018-02-periperi.wiki @@ -0,0 +1,227 @@ +h1. PeriPeri-2018-02 + +http://muistio.tieke.fi/p/periperi-20180202 + +| Dates | 2018/02/01 - 2018/02/02 | +| Place | see 'Activities' below | +|/12. Member | Geert | 02/02 - 04/02 (night @Home) | +| Jacopo | 28/01 - 05/02 | +| Kieran | 28/01 - 05/02 | +| Laurent | 28/01 - 05/02 | +| -Magnus- | +| Marek | +| -Morimoto- | +| -Ito- | +| Niklas | 28/01 - 05/02 | +| Simon | 02/02 - 04/02 | +| Ulrich | 01/02 - 05/02 | +| Wolfram | 01/02 - 05/02 | + +h2. Activities in Brussels + +| Date | Time | Activity | Location | +| Monday 2018-01-29 | 09:00 - 18:00 | GMSL Code Camp | Antoine Dansaert 24, 1000 Brussels | +| Tuesday 2018-01-30 | 09:00 - 18:00 | GMSL Code Camp | Antoine Dansaert 24, 1000 Brussels | +| | 19:00 - 21:00 | San Sablon | | +| Wednesday 2018-01-31 | 09:00 - 13:00 | GMSL Code Camp | Antoine Dansaert 24, 1000 Brussels | +| Thursday 2018-02-01 | 14:30 - 18:00 | Multimedia Meeting | Antoine Dansaert 24, 1000 Brussels | +| Thursday 2018-02-01 | 19:00 | Dinner | https://www.bonsoirclara.com/en/ | +| Friday 2018-02-02 | 09:00 - 19:00 | Core, I/O Group, Virtualization BOF? | http://www.hotelbloom.com/ | +| Friday 2018-02-02 | 19:30 | Dinner | http://www.kokob.be/ | +| Saturday 2018-02-03 | 09:30 - 19:00 | FOSDEM | https://fosdem.org/2018/ | +| Sunday 2018-02-04 | 09:00 - 18:00 | FOSDEM | https://fosdem.org/2018/ | + +h2. List of material for Multimedia code camp + +|Who | What | +|/4. Jacopo | Scope (with probes) | +| Multimeter | +| Network switch | +| Power strip | +|/3. Kieran | Salvator-X H3 + Expansion board | +| 8x RDACM20 | +| 8x RDACM21 | +|/3. Laurent | Kingfisher (including H3SK and MAX9286 add-on boards) | +| Multimeter | +| Power strip | +|/3. Niklas | V3M + Expansion board | +| 8x RDACM20 | +| 8x RDACM21 | + +h2. Agenda for Friday Meeting + +| 09:00 - 09:30 | Welcome Coffee | +|/2. 09:30 - 10:30 | I/O Group Meeting (incl. future tasks) | +| - i2c mux | +| 10:30 - 11:00 | Coffee Break | +|/3. 11:00 - 12:30 | Core Group Meeting (incl. future tasks) (60') | +| - R-Car Gen2 Watchdog Timer | +| Improving renesas-drivers (30') | +| 12:30 - 13:30 | Lunch | +|/4. 13:30 - 15:30 | Virtualization BoF (120') | +| - Status reports | +| - Issues | +| - Next steps | +| 15:30 - 16:00 | Coffee Break | +|/2. 16:00 - 19:00 | Board Farm, Test automation, Remote access (60') | +| Hacking (Eagle, Draak, ...)? (120') | + +h2. Meeting minutes (thanks Kieran!) + +h1. I/O Group meeting + +h2. RAVB : 2K Header limits + +* Niklas has an idea to increase this limit. +* Difference between transmitting and receiving. + + +h2. SPECTRE + +* Wolfram raised that he is Interested in SPECTRE +* 3 Variants of SPECTRE, v2 is the worst - and it's unknown if we can fix it. +* Needs updated kernel (not available for ARM yet) and userspace rebuild. +* Userspace rebuilds (retpoline) may have a performance penalty. +* RMK has reportedly got PoC's which are even more effective at utilising the vulnerabilities. +* Meltdown (PTI) should be an easier fix. + + +h2. Handling Security Issues in a broad context: + +* Laurent raised that a bug in linux-media to read and write kernel memory. + +h2. SDHI + +* Rasied by Simon in absence +* Next steps for HS400 +* Driver and H3/M3-W enablement patches are pending review +* Second upport attempt seemed much easier than first as BSP seems closer to upstream now +* Would like to review other SDHI patches in BSP v3.6.0 with Wolfram, possibly on IRC some time in February +** Yes. WSA, SH to review. + +h2. I2C demux + +* Raised by Simon in absence +* Understands that consensus from San Sebastian meeting was to accept changes despite OOpses in some subsystems when switching cores. Not entirely happy but willing to accept that consensus. +* Would appreciate a rebast/repost of the dts patches +** Wolfram will repost patches. Ack, thanks! +* Any other issues + +h2. MAX9286 GPIO Controller Regulator Loop + +* Circular dependency on GPIO regulator for cameras on Eagle-V3M +* MFD is a lot of over head - but it the only 'correct' solution. + +h2. IO Group: General Status + +* Short meeting style is good for all. (and taken on by other groups) +* Wolfram reprhases summary to make sure he understands it in his own words. +* Wolfram likes Quarterly scheduling of tasks. +* IO tasks agreed by mid-january +** raised externally that this agreement is at least 1 month late however +** high confidence by end of December + +h2. I2C Mux + +* Can we leave mux channels open to improve performance (reduce 'deselect' calls) +* We can have multiple devices with the same 'default' address, and there must be a negotiation stage to re-configure each address on the child bus +** Currently handled by the device driver +* Should core be more involved in this? +* WSA to think about mux topic :-D + +h1. Core Group Meeting + +* Status updates round the table +* We're expecting a new Salvator-XS M3-N board potentially sometime in February ? +* Stout board (H2) getting improved support ... +* Can we add elinux-wiki links to cover letters when we send relevant patch sets for additional tasks. + +h2. RCar Gen2 Watchdog Timer + +* We have a patchset (with 25 patches) from Fabrizio Casteu, and we need to test them. +* Geert to try on Goelsch +* WSA to try on Lager +* Marek to try on Stout. + +h2. Future Tasks + +* With the upcoming complex Virtualised use cases, adding support for JTAG debuggers would assist in debugging complex issues of the virtualised environments at the core level. +* Function enablement on boards as we get them. +* New platforms share lots of support, and with the shared dtsi infrastructure board bringup should be rapid. +* Expand IPMMU IO Vspace to more than 32 bits (neg) +* Blocked on work from Magnus + +h3. Renesas Drivers + +* Improving Integration for multimedia +* Magnus would like a central place for latest multimedia work. +* it easier to use especially from a developer's point of view + +h3. Goals + +* "Renesas-next" but with WIP +* Testing -> Continuous testing +* Shouldn't be a development base +* Doing development on renesas-drivers, means you have to rebase on main before submission. +* Consumption by the BSP +** Releasing a custom kernel -> But we are not a distribution with the resources to test each release. +* Can we have a 'latest topic' branch to continue automatic integration into renesas-drivers +* standardise the feature branches and tag naming scheme +* Dependency handling +* mainline +* subsystem.next +* topic branch +* If you have complex / stale dependencies - then it's fine to leave them out of Renesas-Drivers + +h3. Topic naming scheme bikeshedding: + +* topic/name-version +* subsystem/next/drivers/feature/ +* subsystem/next/core/feature/ +* topic/subsystems/?/feature/ +* subsystem/topic/? + +h3. Preference: + +* Still to be considered ... + +h3. Update for magnus: + +* Standardize on a naming scheme, to define the topic prefix. From there Geert will integrate the latest version based on that prefix. + +h1. Virtualisation + +h2. QEMU running on an arm64 guest + +* Plain QEMU if host is amd64 or arm64 +* KVM if host is arm64 (R-CAR H3 or M3-W) +* KVM needs ARM trusted firmware with HYP support +** https://elinux.org/R-Car/Virtualization + +h2. Libvirt + +* virsh (on amd64, or arm64) +* virt-manager (on amd64) +** https://elinux.org/R-Car/Virtualization/Libvirt +* Provides an abstracted interface common description for multiple virtualisation options. + +h3. Virtualisation Status + +* Walk trhough of GPIO pass through from Geert +* Configuration of host to enable GPIO passthrough + +h3. Guest side (QEMU) + +* vfio-platform support not yet supported but patches were posted + +h2. Next Steps + +* Reset driver, using CPG/MSSR +* Interrupts +* IOMMU groups + +h1. Board Farms + +* BayLibre ACME is sold out. Can we make or obtain alternatives? +* Prototyping with a Teensy 3.2 (freescale cortex-M4) +* Kit: (Search aliexpress for 'travel router usb') |