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<wens>
icenowy[m]: I'm getting "i2c bus locked" error on pine h64 for the pmic
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<icenowy[m]>
wens: with my current code?
<wens>
icenowy[m]: mostly, yeah, i did a few tweaks to rebase them on sunxi-next
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<icenowy[m]>
maybe this is an issue about master mode
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<wens>
the rtc chip is also blocked, i.e. the whole i2c bus
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<icenowy[m]>
wens: with current mv64xxx-i2c the bus can be fully blocked by a single device connected
<wens>
I guess we need to add support for resetting the bus :(
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<mripard>
wens: if a device start to misbehave on an i2c bus, then it's the device itself you need to reset
<mripard>
not the bus
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<Net147>
wens: mripard: I have found sometimes it's necessary to soft reset the i2c bus after powering an attached i2c device on/off
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<Net147>
wondering why there is no userspace API to do that...
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<willmore>
Depends on if your host controller has a way to escape from a slave doing a 'clock stretch'. Generally the way to do that is to reset the host controller.
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<lurchi_>
willmore: host controller reset will not help
<lurchi_>
you have to toggle the clock line 9 times
<lurchi_>
most host controller drivers do this if they see a busy timeout on the bus
<wens>
mripard: there are two devices, both on by default, so kind of hard to know which one
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<fredl_>
hey guys, I'm reading on the wiki that LiveSuit is for flashing the *NAND*
<fredl_>
but how about eMMC ?
<fredl_>
is there another method to push image to eMMC?
<BenG83_>
can you boot from sdcard?
<fredl_>
no
<BenG83_>
you can also use FEL to expose eMMC as mass storage via u-boot
<fredl_>
device has no sdcard slot
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<fredl_>
It will be delivered with empty eMMC chip and want to use FEL mode to send image to it
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<fredl_>
ah okay....
<BenG83_>
then I would load u-boot via FEL and switch to UMS mode
<kevans91>
I mean, it looks nice, but I didn't think it really looked $300 nice
<miasma>
let's hope the situation will improve. most schools I know won't even consider other boards than rpi3 or ipad for education
<fredl_>
Not for schools, low volume personalized training courses
<kevans91>
Bah, perfectly good allwinner boards for that
<miasma>
same thing with arduinos. they refuse to buy cheap chinese clones, only the official arduino uno (which is 5 times as expensive) or intel board will do
<kevans91>
That seems unreasonable
<kevans91>
Most of the clones are just as good as the real deal
<miasma>
they are provided via official supply channels and provide "support"
* kevans91
ponders what kind of "support" you need with an arduino
<fredl_>
well bottomline is that no support company can even come close to an enthusiastic opensource community
<miasma>
kevans91: for example, if you buy a clone 16x2 lcd, it might have a different i2c address. this would lead to a disaster in a class room when the teacher can't fix it
<fredl_>
'support' is a corporate word anyway, no child should be fouled so early by the meaning of that IMO
<miasma>
support also means that when you buy a 25 EUR arduino, you get a replacement for free if the board is DOA
<kevans91>
Ahh, yeah, that makes sense
<kevans91>
I don't tend to think of replacements as part of support, but I can see that
<miasma>
and the teacher doesn't need to know if it's broken. the official supply store can check it
<fredl_>
'support contract' is management-speak for 'my ass is covered'
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<fredl_>
but those pinebook's would be perfect to teach kids on, and at start of course give them their own pinebook, hmmm
<fredl_>
what company is behind those pinebooks?
<fredl_>
AllWinner?
<jonkerj>
pine
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<fredl_>
Just a California company that took it upon themselves to sell awesome little laptops for that little money?
<fredl_>
That's quite amazing tbh
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<ullbeking>
Bah, looks like OPi +2E is sold out again.
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<miasma>
ullbeking: will they produce more boards later
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<KotCzarny>
old times, good times
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<ullbeking>
[TheBug]: thank you x1000
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<willmore>
miasma, if you're worried about DOA, just order 4x the # of boards you'll need. You'll have enough good boards, plenty of spares, and still pay less than 'official' boards. ;)
<willmore>
BenG83_, sure, why not? Add a little LN2 and you're good to go.
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<ullbeking>
[TheBug]: what do you think about the price of that OPi +2E?
<ullbeking>
i never tried a zero plus before... how much better than regular opi zero is it?
<smaeul>
it's h5 and gigabit ethernet
<smaeul>
so the best board for tiny headless servers
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<smaeul>
and the cheapest 64-bit one you can get
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<DonkeyHotei>
is it still being sold?
<ullbeking>
what's the upstream support for opi 0+ like?
<DonkeyHotei>
hmm, apparently zero plus is newer than zero plus 2
<DonkeyHotei>
how intuitive
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<ullbeking>
is the wifi any better on the 0+ or 0+2 compared to regular zero?
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<DonkeyHotei>
anything is
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<KotCzarny>
if 0 uses xr819 then everything is better
<KotCzarny>
0+2 has h3 and h5 versions
<KotCzarny>
0+ has spi flash, 0+2 has emmc
<KotCzarny>
if you want fast storage for os, choose 0+2
<KotCzarny>
though 0+2 doesnt have ethernet at all
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<ullbeking>
19:07 <KotCzarny> if 0 uses xr819 then everything is better
<ullbeking>
is this something that got changed in the controversial v1.4 unannounced revision change?
<DonkeyHotei>
0+2 has ap6212 while 0+ has rtl8189
<DonkeyHotei>
but 0+ is h5-only
<ullbeking>
according to my rudimentary understanding of upstream support for opi device trees, h3-based boards tend to be better supported than h5... does that notion make sense?
<DonkeyHotei>
h5 is 64-bit
<KotCzarny>
yes, but h5 arent that far behind
<KotCzarny>
though yes, h3 makes quite nice mailine machine
<BenG83_>
I ordered a Yuntab B102 ;)
<DonkeyHotei>
BenG83_: what chip?
<KotCzarny>
and with ths patches from megous its super cool with si8106
<BenG83_>
it has two normal USB-A and extra HDMI output
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<BenG83_>
I was looking for something 10inch sized that can do 720p
<ullbeking>
i'm not concerned about 32-bit vs 64-bit at this point in time. ofc i will experiment with h5 boards, but i think h3 makes life a little bit easier.
<KotCzarny>
i've recently bought second hand a31 tablet with 2048x.. ips display. for ~15usd
<ullbeking>
19:18 <KotCzarny> yes, but h5 arent that far behind
<ullbeking>
thanks for the affirmation
<ullbeking>
19:19 <KotCzarny> though yes, h3 makes quite nice mailine machine
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<ullbeking>
quick poll: what cases do people here generally like for the opi +2e (and other opi's)? i often get the stock cases that come with the kits, but i find they're pretty rough and often they don't fit the board well and require filing holes, etc.
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<megi>
it's current mainline linux + sunxi related patches pulled from linux-next (that is what will be in the next mainline kernel in two to three months)
<ullbeking>
these features are interesting:
<ullbeking>
- CPU frequency and voltage scaling (cpufreq)
<ullbeking>
- Thermal regulation (if CPU heats above certain temperature, it will try to cool itself down by reducing CPU frequency)
<megi>
it's middle ground between having latest features and still having my data uncorrupted ;)
<ullbeking>
are those features related to the cpu throttling you referred to above?
<megi>
yes
<ullbeking>
and you are saying that the thermal regulation and cpu freq/voltage scaling are never engaged (but that they should be), or that they are engaged and you don't like that performance suffers?
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<megi>
I bought the biggest heatsinks that still fit the PC/PC2 boards on aliexpress, and that helps so that DVFS does not need to engage that much or at all.
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<megi>
So the boards can run at ~1.3GHz most of the time
<megi>
I like PC/PC2 boards because nothing is sticking out preventing the easy installation of bigger heatsinks.
<ullbeking>
i see
<ullbeking>
megi: where did you get the spacers that separate the boards?
<ullbeking>
i'll run the page through google translate, you've probably already written it in the post
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<KotCzarny>
megi: megous tree sets cpu to ~1.36ghz max
<KotCzarny>
which is a bit of a stretch ;)
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<megi>
I've been running it on my 10 boards for years with probably 1 panic so far
<megi>
and I'm not sure what that was about :)
<KotCzarny>
still, it heats them a bit under stress
<megi>
do you mean without heatsink?
<megi>
and what temperature did you reach?
<KotCzarny>
i wouldnt run them without heatsink at 1.2+ ghz
<KotCzarny>
last time i managed to get ~80C+
<megi>
that's quite a bit, I guess this all needs to be tuned to the particular use case and board/heatsink/fan setup
<KotCzarny>
yeah it was in closed case
<megi>
my settings are not all that conservative
<KotCzarny>
still, i'm grateful for ready to consume h3 tree
<KotCzarny>
my work on h3 based router/pi-hole box can continue
<megi>
i tried to make the thermal zone setup quite aggressive, but it can be made still more aggressive so you can keep high CPU frequeny if you have bursty CPU load
<KotCzarny>
yeah, i just cpufreq limited to 1.2 in /etc/rc.local
<megi>
pi-hole doesn't sound like it would be CPU bound
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<KotCzarny>
yes, but it will be also used as a distcc slave
<megi>
ah :)
<KotCzarny>
that's what i like in those boards
<KotCzarny>
multitasking little elves
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<TheSeven>
aaaand of course my DMA thing failed again after several hours
<TheSeven>
this time it looks like after ~71 million DMA operations, a single DMA completion IRQ just went missing for no apparent reason
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