Turl changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi
<swiftgeek> looking for other tablet-like devices
<swiftgeek> there is CONFIG_USB0_VBUS_PIN , CONFIG_USB0_VBUS_DET . Is there one for USB ID pin?
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<swiftgeek> oh inet98v_rev2_defconfig has it
<swiftgeek> is there something like fastboot available from uboot ?
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<swiftgeek> oh it was added recently
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<swiftgeek> so the only weird thing remaing is usb_drv_vbus_gpio = port:power203<1><0><default><0>
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<swiftgeek> ugh that was hard to find
<swiftgeek> AXP0-* or something else
<swiftgeek> but i can't quite see it in device tree
<swiftgeek> is it the strange pmic@number ?
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<swiftgeek> or reg_ldoN / reg_dcdcN
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<swiftgeek> but no idea how to figure them out safely
<swiftgeek> oh none of axp can do usb
<swiftgeek> it's only buck/ldo so regulator for otg has to be completely separate
<swiftgeek> that's so much easier to test :3
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<voxadam> Wow. There are more people here than I expected to find in a channel dedicated to a single inexpensive line of ARM based SoCs.
<NiteHawk> world domination plan comes along fine... :D
<voxadam> Now if only Allwinner would comply with the GPL. I just learned that they're not very good at complying with their legal obligations via the wiki.
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<voxadam> Is it possible for person to buy Allwinner processors in small quantities for small run custom designs?
<voxadam> Olimex has a few SoM options but sometimes a person want's to go all the way with a custom design.
<Inode> voxadam: you'll see them for sale on aliexpress
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<voxadam> Inode: I did see some there. I buy from Aliexpress from time to time but with processors I worry about the quality of the parts I'm paying for. Buying B-grade (or worse) processors is a good way to end up pulling one's hair out during debug.
<voxadam> But I'll keep Ali in mind.
<voxadam> How's the video decode performace on Allwinner chips?
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<Inode> i'm not sure anyone other than small time chinese electronic component vendors are going to entertain low order quantities, but you never know
<voxadam> Fair point.
<voxadam> I'm mostly interested in h264 decode performace.
<voxadam> 1080p at the most (for now)
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<Inode> it looks like you can actually purchase the SoCs from Olimex, if that makes you feel more confident about potential quality
<voxadam> Inode: Interesting. I missed that. Thanks for the tip.
<voxadam> Their prices aren't too bad either, not too much more than on Ali.
<voxadam> I'll keep both in mind for when I get to that point.
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<eagles0513875_> hey all
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<voxadam> G'day!
<eagles0513875_> hey voxadam
<voxadam> well... morning, a rather early morning where I'm at.
<eagles0513875_> afternoon here
<voxadam> Must be nice. Its 0354 here.
<voxadam> Sleep is for the weak.
<eagles0513875_> lol
<eagles0513875_> you state side
<eagles0513875_> west cost USA im guessing
<voxadam> Exactly.
<orly_owl> why so early
<voxadam> I'm still up.
<orly_owl> ok, why so late
<voxadam> Working on a few projects.
<voxadam> I've been reading up on Allwinner SoCs as well as working on the designs for a couple more constrained microcontroller based devices.
<orly_owl> any end goal?
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<voxadam> Also learning a bit more about the Banana Pi & Pro boards.
<orly_owl> yay
<voxadam> I'm working on something resembling a television set top box likely based on etiher an A20 or a Freescale i.MX 6.
<voxadam> The micro based stuff is more IoT focused.
<orly_owl> a nice meaningless term
<orly_owl> like Y2K ready
<eagles0513875_> god im losing my mind
<eagles0513875_> i dont even know where to begin i have a cubieboard 2 and i want to create my own highly customized distro
<eagles0513875_> for it as this will be used by me
<orly_owl> voxadam: there are a few A20 based set top boxes already, how will yours differ?
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<voxadam> The STB type device that I'm thinking about will be used as a hub for the IoT, maybe. Not sure if I'll go with A20, i.MX6, or even Atom.
<voxadam> The A20 is cost effective, but Freescale is a bit more open with the documentation on their i.MX 6.
<voxadam> Plus, bunnie and xobs done a ton of work based around the i.MX 6 with their Novena open hardware laptop.
<voxadam> It's hard to pass up the A20; it's so inexpensive.
<orly_owl> allwinner are just lazy or dont understand
<voxadam> That's entirely likely but doesn't do me/us any good.
<voxadam> I'm seriously leaning toward the A20 as Banana Pi boards make decent dev boards and they're not only cheap but easy to come by.
<voxadam> I wonder what the OpenCL or other GPGPU support is like for the Mali 400 on the A20.
<Inode> eagles0513875_: buildroot or linux-for-scratch are worth looking at for that
<voxadam> Just checked. No OpenCL support for the A20.
<eagles0513875_> let me ask you this
<Inode> s/linux-for-scratch/linux-from-scratch/g
<eagles0513875_> can i just grab an image of debian
<eagles0513875_> put it on the microSD and boot
<eagles0513875_> or its not as simple as that
<eagles0513875_> as my cubieboard2 has uboot already
<Inode> you can grab a debian rootfs and use a kernel that suits your hardware
<eagles0513875_> Inode: so basically i can build my os from scratch on debian so to speak and custoomize it accordingly
<Inode> you could customize an existing debian rootfs, sure
<eagles0513875_> voxadam: those images do i just put one on a microsd card
<voxadam> I assume you just write them to an SD and boot.
<eagles0513875_> Inode: can you confirm that
<Inode> i've never used those images, so i don't know
<Inode> but i have used armbian on a cubox, and it was pretty much plug and play once you wrote the image to an sd card - i assume the experience should be similar for the cubieboard
<eagles0513875_> ok Inode how about customizations?
<Inode> if i wanted something custom, i would most likely go with buildroot
<Inode> what are you hoping to achieve anyway?
<voxadam> OpenEmbedded or Yocto should also be possible but it's a fairly involved process from what I know.
<eagles0513875_> Inode: was hoping to just get my hands dirty so to speak with a bit of distro development and customization
<eagles0513875_> was contemplating using a command line only version of debian
<eagles0513875_> and then building enlightenment and all the necessary x servers etc to et it working as a desktop
<Inode> if you're hoping to learn about how distributions are generally put together, linux from scratch is a good experience to go through
<eagles0513875_> Inode: might go through that as well im very interested in learning how embedded systems work as well.
<voxadam> ttps://github.com/cubieboard2/manifests
<eagles0513875_> thanks voxadam
<eagles0513875_> im off to lunch ill be back later on
<voxadam> It all depends how deep in you want to get.
<eagles0513875_> ya i am aware of OE
<eagles0513875_> just so many way to reach the same end point its mind boggling.
<voxadam> Welcome to embedded systems.
<voxadam> eagles0513875_: You might also look at https://wiki.debian.org/DebianCustomCD for creating a custom Debian image.
<voxadam> Yocto is based on OpenEmbedded but from what I understand it's a bit more polished and has decent docs.
<voxadam> Buildroot is another really powerful option.
<voxadam> If you're interested in creating a truly custom image for an embedded Linux board I'd check out Yocto. It's a superset of OpenEmbedded and is backed by Intel.
* voxadam just noticed that the person he was talking to left for lunch. :)
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<libv> voxadam could've bought small numbers of chips from olimex directly
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<libv> ah, Inode pointed him to that
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<plaes> libv: Hans just pushed commit "mali400-stub"
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<libv> plaes: his manager and his colleagues will be happy about that
<plaes> we'll see
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<swiftgeek> is there some simple linux rootfs that will work with mainline u-boot?
<swiftgeek> i tried archlinux and i get 0 output over console sadly
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<faisal_> hi
<jelle> swiftgeek: I've been using fedora's images with a mainline u-boot
<jelle> well mainline'ish
<swiftgeek> well i meant something minimal
<jelle> what kind of hardware btw>
<swiftgeek> Q8 tablet motherboard alone
<swiftgeek> fun stuff for learning :D
<jelle> oh so a23?
<swiftgeek> a13
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<swiftgeek> http://dpaste.com/38Z4HE4 this is my device tree
<swiftgeek> kinda wip, but i wasn't expecting broken uart
<jelle> hmm
<swiftgeek> i have hard time thinking today so if i get uart that would be awesome xD
<swiftgeek> even if it panics
<jelle> so u-boot doesnt show anything?
<swiftgeek> u-boot does
<jelle> ok
<jelle> I think I've edited the kernel's config to display backlight with my tablet
<swiftgeek> well i only have uart ^^'
<jelle> ah ok
<jelle> so it just doesnt boot?
<swiftgeek> no idea
<swiftgeek> i only have uart
<jelle> so what does it display..
<swiftgeek> and if it doesn't shoves data thought it i have no way of telling without jtag
<swiftgeek> *through
<jelle> hmm no clue sorry
<NiteHawk> have you checked http://linux-sunxi.org/Mainline_U-Boot#Troubleshooting - there's a variety of reasons where linux might get stuck at "Starting kernel" with current U-Boot
<swiftgeek> nothing matches there
<swiftgeek> archlinux is running on something far more recent than 3.4, dtb is in place (/boot/)
<swiftgeek> i have used ~those instructions to create sdcard http://archlinuxarm.org/platforms/armv7/allwinner/cubieboard
<swiftgeek> with ofc my u-boot
<swiftgeek> i don't see other definition that pinctrl-0 = <&uart1_pins_b>
<swiftgeek> *than
<swiftgeek> so i guesss this should make /dev/ttyS0 the same uart as the one in uboot
<Inode> swiftgeek: does the kernel command line have the correct tty specified for the "console" parameter?
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<mripard> swiftgeek: enable earlyprintk in the kernel
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