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<pulser>
mmind00, soldering my breakout board for micro USB soon as I get to my office - by fluke I bought female micro breakout a few years ago, and didn't need it!
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<pulser>
interesting - it just freezes at the usual "Suspending console(s) (use no_console_suspend to debug) - then the system wakes/remains awake but without any message... so I shall do no_console_suspend now and have a look there
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<pulser>
even more interesting, mmind00 - setting no_console_suspend appears to remove the issue; I just did a series of wake/sleep cycles and had no issue while watching dmesg
<mmind00>
pulser: oh fun ... out of curiosity, as this is 4.4-rc(not-even)1 ... did you observe this in the past as well? Trying to determine if it may be something introduced during this merge window
<pulser>
yes this was there in the past
<pulser>
OK, I managed to make it crash now! it's the mmc/emmc freezing
<pulser>
which then led into a kernel panic (which I need to try to properly capture
<pulser>
and thanks to screen, I have it captured :)
<pulser>
so it seems like the mmc_host mmc2 timeouts are the first issue, which then leads to NMI watchdog biting on CPU0 being jammed (most probably due to the mmc2)
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<mmind00>
pulser: hmm, I would interpret that a tad differently :-) ... with the mmc timeout only being a symptom
<mmind00>
mmc2 is the wifi ... so my story would be around a bug in the wifi driver getting stuck ... the mmc-timeout is a symptom, because the wifi module does not respond anymore
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<pulser>
Mmind00, interesting - I need to take a look at the power domains there as perhaps turning it off in sleep would help (if not already), as it would get a power cycle
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<pulser>
mmind00, so had a look - vcc18_wl is on in sleep, and that seems to be only used for wlan (name backs what I understood from the dts), so I'm going to try putting that off in sleep to give the card a power cycle
<mmind00>
pulser: not sure if the card+driver will handle that well
<pulser>
Ah - good point
<pulser>
Let's see what chrome OS does
<pulser>
Yeah they're leaving it on all the time, and it seems they support waking from a Bluetooth device like a keyboard
<pulser>
So they're obviously not turning the power off
<mmind00>
pulser: I'm not sure how similar the drivers actually are ... wifi mainline support is still something no chip vendor wants to do
<pulser>
Ah interesting - that's a shame
<mmind00>
the brcmfmac in mainline at least allows me to use a wifi
<pulser>
I mean it's Broadcom, and I don't suppose they're going to be the most encouraging either!
<pulser>
Yeah indeed - it actually works which is a positive compared to many boards
<mmind00>
yep ... from what I've gathered so far, broadcom in mainline is mostly a volunteer effort
<pulser>
Yup - they are fairly closed as I understand
<pulser>
They seem to have little interest in Linux support at all (if any)
<mmind00>
other rockchip chromebooks use chips that uses mwifiex ... it can connect to network, but when you transmit it kills the cros_ec on my jerry
<mmind00>
cros_ec only comes back after disabling the wifi again
<pulser>
I replaced the WiFi module from a colleague's laptop recently as he was stuck with Broadcom on a Dell ultrabook
<pulser>
Ouch
<pulser>
That's rather strange
<pulser>
Unfortunately embedded systems are fairly non-standard, even with so much progress in recent years and months
<pulser>
Oh well, I have a long term dream that one day, embedded devices will use nice standardised interfaces to communicate with all the external components on the board; one which is well designed, documented, and suitably generic new devices can be added
<mmind00>
greybus?
<pulser>
Oh very interesting
<pulser>
Hasn't seen it before, but it sounds rather nice
<mmind00>
not? ... that are the internals of project ara ;-)
<pulser>
USB was a big improvement upon the mishmash we had before - I remember manually configuring IRQs
<pulser>
This sounds almost the embedded parallel of this
<pulser>
No I hadn't seen this before - I'm a little hesitant we will really see adoption of modular phones, but I'd love to be wrong!
<pulser>
Fairphone has a modular one coming out, but I think some of the big names won't be keen on the idea of losing regular sales, especially if you can have your phone upgraded at the local technology shop
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<xcasex>
yeah.. modular phones arent going anywhere unless someone figures out how to make them "trendy"
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<amstan>
mmind00: why would it kill cros_ec?
<mmind00>
amstan: I don't know ... connecting to the wifi still works, getting the first webpage too ... but then keyboard becomes unresponsive
<mmind00>
only once I drop the network connection do keys work again
<amstan>
does reading the firmware via flashrom still work in those cases?
<amstan>
it's weird because the wifi and ec are on 2 separate busses(mmc vs spi)