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<ron__>
Hi everyone.. I want to build NAND image for Cubieboard2 from source. Can someone recommend which kernel and uboot source should I use? And what configurations?
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<plaes>
ron__: what have you tried?
<ron__>
I tried https://github.com/linux-sunxi/linux-sunxi. I installed the armbian ubuntu image and replaced uImage. It doesn't reach the login prompt. I dont necessarily need to use the armbian image but I just thought it could be a good head start.
* ron__
slaps lynxis around a bit with a large fishbot
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<miasma>
howdy. are there some known issues with allwinner a20 and kernel 4.3+. i have a banana pi board and mainline 4.2 boots fine, but 4.3+ gets stuck right after uboot starts booting it. i've tried to enable all verbose boot messages but it doesn't show anything (via uart). just hangs
<miasma>
the same kernel config boots 4.2
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<wens>
did you update the dt blob with 4.3?
<wens>
there are incompatible changes between 4.2 and 4.3
<wens>
you should always use the same version dt as the kernel
<wens>
you should use the one that came with the kernel
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<wens>
linux and u-boot dts are not always in sync
<miasma>
there was an option in menuconfig to bundle the file with the kernel. is that ok way to use it? would it then discard the one compiled with u-boot?
<miasma>
yea, that's probably it
<wens>
i suppose you are loading the .dtb separately in u-boot? just replace that file
<miasma>
right
<miasma>
i was just curious, how that option from kernel's config works
<miasma>
apparently it appends the stuff after zImage?
<wens>
you have to append it yourself
<wens>
that option tells the kernel to look for a possible dtb after zImage
<wens>
it is better to use a separate .dtb, and let u-boot load it, and patch it
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<wens>
u-boot patches stuff like ethernet mac address, dram size, simplefb
<wens>
things that u-boot sets up
<miasma>
alrighty
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<plaes>
ssvb: my Orange Pi PC 1.2 fails with 672 in ~15m
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<GeneralStupid>
plaes: hi, memtest?
<GeneralStupid>
plaes: do you run it on 1.6Ghz without cooling?
<GeneralStupid>
plaes: i read that the H3 should max. run at 1.2 with 1,3V
<GeneralStupid>
plaes: oh ok :) Isee!
<GeneralStupid>
plaes: i just want to add, 1.6 is useless for most things... for my little homeserver it is more limited by disk io; for my settop box 1.6Ghz does not work (with cooling) but with VPU it runs fine between 480 and 900 Mhz
<plaes>
these tests are about figuring out the correct settings for DRAM controller
<GeneralStupid>
plaes: i see... nice work but looks hard to reengineer everything
<plaes>
it's not re-engineering, it's about having proper u-boot support for H3
<GeneralStupid>
oh, see... I forget to upload my mpv.dev wich works fine with libvdpau
<GeneralStupid>
I just managed to use that for everything (dvb, iptv, ...)
<GeneralStupid>
plaes: maybe its just that i have a different understanding of reengeniering
<GeneralStupid>
but isnt there a datasheet which tells the dram configuration?
<IgorPec>
ok, i'll check around. now i know what to look for
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<GeneralStupid>
ok i have one problem left.
<GeneralStupid>
my dvb stick does sometimes not work... you have to unplug und plug it in again... But if i finish my case i would not be able to do this...
<GeneralStupid>
Is there a possibility to disable and enable the USB per commandline?
<plaes>
you can send reset to usb device
<GeneralStupid>
how :)
<plaes>
google
<plaes>
sysfs usb reset
<plaes>
I don't remember details
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<GeneralStupid>
plaes: ahh its easy, nice :)
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<plaes>
IgorPec: wens just pushed cubieboard4 dtb too
<GeneralStupid>
great... irw does not echo anything
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<GeneralStupid>
but my remote key strokes are recognized :)
<wens>
plaes: what's up?
<IgorPec>
plaes: wens: ah, i am trying to boot into CB4
<IgorPec>
with mainline u-boot but looking around how to
<jemk>
ssvb: yep, and it is necessary for power management, because there is no pmic
<jemk>
if we ever want to poweroff (and be able to power on again) we need it
<arnd>
so no big surprises in the leaked A64 data sheet and user manual, looks a lot like A33
<arnd>
now supports 3GB of RAM, yay for 64 bit processing
<ssvb>
jemk: I think I heard that somebody was saying that openrisc had been replaced by cortex-m3 in newer allwinner chips, but the the blob in the h3 sdk looks like it contains openrisc code
<jemk>
ssvb: a80 has m3 (or 4)
<ssvb>
ok, nice, so the true open source cpu is still in use :)
<ssvb>
I was afraid that allwinner had discovered some fatal bugs in it and decided to drop it
<jemk>
i don't know openrisc very well, always getting confused by the delayed jumps
<arnd>
ssvb: does the or1k core have access to the same address space as the Cortex-A7 cores? It would be nice to get Linux to run on it
<jemk>
arnd: i think it has, but I don't know for sure
<arnd>
if it does, we should basically be able to run all the same drivers that we already have, and use the same dtb, maybe with small modifications
<arnd>
no D-Cache would just make it slow, but probably still a nicer platform than the software simulation that is the only thing that upstream Linux/openrisc runs on
<arnd>
A Linux port to NOMMU openrisc is of course possible, but right now it assumes there is an MMU
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