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<larsc>
apelete: yes
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<apelete>
larsc: good morning
<apelete>
larsc: been doing some homework this week, reading about DMA & MMC/SD spec basics
<apelete>
larsc: looking at a few drivers code in drivers/mmc/host/, it appears dmaengine_prep_slave_sg(), dmaengine_submit() and dma_async_issue_pending() are indeed important parts of the dmaengine API, just like you said
<larsc>
good
<apelete>
larsc: but I can't figure out where to start, each driver I read is organized differently
<apelete>
larsc: any clue about what I should get started with ?
<larsc>
You can start with adding code to request and free the dma channel
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<larsc>
then for read_data() and write_data we need equivalents which use dma
<apelete>
larsc: ok, thanks. request and release dma channel should be done in driver's probe() and remove() I guess, will get started with that
<larsc>
I think davinci_mmc.c looks like what we need
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<apelete>
larsc: looked at davinci_mmc.c yesterday night but I wasn't sure if it was a good example or not. thanks
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<larsc>
among all of them it is probably the closest to what we'll need
<larsc>
Stage 2, Anger: "Lennart is literally Satan and Redhat is essentially the Microsoft of Linux"
<whitequark>
you mean he's not?
<larsc>
I'm just quoting the talk
<roh>
'getroffene hunde bellen'
<lekernel>
at least, systemd fixes the problem of your laptop suspending when you close it during shutdown
<roh>
he is just annoyed that lennart is fixing problems in a non-classic-unix-way
<roh>
and that it wasnt his idea
<lekernel>
(only to complete the shutdown when you open it again, if the battery wasn't drained already and awarded you a fsck)
<pcercuei>
lekernel: but then you can't configure your laptop to suspend when closing the lid only if on battery
<roh>
systemd is something i really look forward to, compared to the broken classic unix concepts. well. maybe when its avail on debian by default.
<larsc>
yep, modern init done right
<roh>
for the embedded world there is also a moden init/process management: procd and netifd
<roh>
its using ubus, instead of dbus.
<pcercuei>
init done right, heh
<pcercuei>
I'll stick to using busybox' init system for now
<larsc>
pcercuei: did you find a place to stay?
<pcercuei>
no
<larsc>
:/
<pcercuei>
I'm not searching :)
<larsc>
ok
<larsc>
did you change your mind?
<pcercuei>
about?
<larsc>
munich
<pcercuei>
no, I signed the contract
<pcercuei>
however, looking for a place from here is not something easy; first because most of the offers disappear after one week, and I prefer to be able to visit
<larsc>
ok
<larsc>
did they ask you what kind of laptop you want?
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<pcercuei>
huh
<pcercuei>
I get a laptop?
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<pcercuei>
I thought I'd have a regular desktop PC
<pcercuei>
I want it pink :D
<larsc>
nobody has a desktop pc, I think
<larsc>
it always takes forever to order stuff, would be a bit unfortunate if there was no computer when you start ;)
<pcercuei>
what do you mean by what "kind" of laptop I want?
<pcercuei>
I'll have to choose between models?
<larsc>
I think there is a netbook, a normal laptop, and a developer laptop
<larsc>
you want the developer laptop
<larsc>
more cpus, more ram, etc...
<larsc>
I'm just asking, because it happend in the past that people simply forgot to order stuff
<pcercuei>
and I believe I can't use my own laptop
<larsc>
not if you want to have access to the intranet
<larsc>
my vacation is over now, I'll ask tomorrow
<pcercuei>
okay
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<DocScrutinizer05>
whitequark: re Galden and excellent gas transporting properties: I just notices that it is easily explained by Joerg's 2nd physical law of aggregate states: the more a substance tends to transform into another aggregate state, the less of other substances of that aggregate state it can solve
<DocScrutinizer05>
hot water can solve less gas since it's closer to becoming a gas itself
<DocScrutinizer05>
Galden is pretty far from transition into gas phase
<whitequark>
that's a really strange observation
<whitequark>
otoh I never read up on the actual science behind gas solubility, maybe now's the time
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<DocScrutinizer05>
strange observation? really? think of sugar in cold tea vs hot tea. Cold tea is closer to the solid aggregate state of sugar
<whitequark>
strange is a poor word
<DocScrutinizer05>
and ice can't solve any other solids, as we all know
<whitequark>
what I meant is that it's not clear whether your observation reflects some underlying principle or it's just a lucky coincidence for several obvious cases
<whitequark>
well, as I understand, ice won't include anything except water because it's a crystal
<DocScrutinizer05>
I state it's a basic law, and invented/found by me
<whitequark>
"The variety of approaches which have been used to determine the solubility of gasses in liquids is an adequate testimonial to man's ingenuity." hehehe
<DocScrutinizer05>
whitequark: of course joerg's 2nd aggregate law is not sufficient to explain the special properties of Galden resp long-chain-alcohols