rellla 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 - *only registered users can talk*
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<parco> hi all, after following the manual build guide, I'm seeing "EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem" during boot up
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<parco> then fails to boot since it can't write to /etc/machine-id
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<parco> any ideas?
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<kilobyte> parco: the first message is normal -- it just meant that ext4 partially ignored the mount option
<kilobyte> for real read-only you'd need ro,norecovery; otherwise it will still write to the $DISK while processing journal, and only then become read-only
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<kilobyte> the userland (be in initrd or an init script) is then supposed to remount / rw
<parco> I see, i had assumed something was wrong since a bunch of stuff fails to start, including the journal
<kilobyte> "including the journal"? It's a part of ext4...
<parco> i end up being presented with a "LXC_NAME login:" prompt
<kilobyte> are you mounting it as ext2?
<parco> I'm not sure, i'm using the boot.cmd from this page: http://linux-sunxi.org/Mainline_Kernel_Howto#SD-Card_Boot_partition
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<kilobyte> boot.cmd is for u-boot, at that time you already have the kernel loaded, and the root= line doesn't include filesystem type
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<kilobyte> /etc/machine-id is supposed to be written once, so I guess it's lacking on your system
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<kilobyte> then some tool notices it missing, tries to create it, despite / not having been remounted rw yet
<parco> the output log says something about that, i'm just having a hard time copying the log :/
<kilobyte> not sure if there's something wrong other than missing /etc/machine-id; you can try creating it manually to see if that'd help
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<parco> going to try a brand spankin new SD card, then i'll try to manually populate /etc
<parco> same login prompt, is there a username and password i could punch in here?
<parco> LXC_NAME login:
<parco> Here is the complete log: https://pastebin.com/raw/M5YjiYsk
<kilobyte> that's unrelated to booting, you have the userland up, it's regular Linux administration at this point
<parco> that's good news, i think :)
<parco> I'm just trying to get past this login prompt so I can try to load some kernel modules
<kilobyte> it's quite clearly written, look around the "Welcome to Ubuntu 18.04.1 LTS!" line
<parco> "Set hostname to <LXC_NAME>" being near the /etc errors led me to think the reason i'm seeing this login prompt is because of the readonly issue
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<kilobyte> Ubuntu insists on systemd which is one big fat regression; you'd need to make it happy somehow
<kilobyte> you can create /etc/machine-id from another machine
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<kilobyte> mount the SD card in a card reader, write the file
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<parco> just stick any old number in there?
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<kilobyte> I think anything should work, yeah -- if it's 16 bytes (32 hex digits)
<kilobyte> or, alternatively, if you can conveniently append to kernel boot line (like, interactively in u-boot), you can make / rw
<kilobyte> either via rootflags, or via init=/bin/bash
<kilobyte> with bash you can remount /, do whatever setup you want, and only then "exec /sbin/init"
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<parco> that did the trick!
<parco> Dang, still can't get passed this login primpt
<kilobyte> did you use a card reader, or appended to kernel boot args?
<parco> the card reader technique
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<parco> ahh i think this prompt is a result of me using a rootfs from LinuxContainers
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<parco> LXC == LinuxContainer ..?
<kilobyte> if the former, you can chroot to what you mounted. If your big machine has a different arch (amd64 I guess), you'd need to install qemu-user-static first.
<kilobyte> I mean, chroot then change the password
<kilobyte> copying a known value to /etc/shadow would also work
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<kilobyte> (I'm assuming you don't know the password)
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<parco> no idea, i simply downloaded the tarball from https://images.linuxcontainers.org/images/ and copied it to the ext4
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<parco> i wonder if i have the ability to make changes to the wiki at linux-sunxi.org... it's overall awesome, just a couple things could be sorted
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<wens> parco: register an account, come back to IRC to have your account "enabled", then you can edit
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<silviop> does exist modern allwinnet tablet full supported by U-boot/linux sunxi ? (like A64 tablet onda V80 SE)
<silviop> I want change my A31s tablet (that work like charm with linux-sunxi/uboot and xubuntu)
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<Nemo_bis> ciao silviop
<paulk-leonov> silviop, I have a V80 SE and I'm looking to port mainline to it
<paulk-leonov> The DSI panel might be a bit tricky
<paulk-leonov> help to the support is welcome :)
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<silviop> Mripard says me that you need panel initialization commands in mpidsi
<silviop> so i suppose there is a way to extract from android and to put in dtb or firmware folder
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<silviop> u-boot does not support MPI-DSI(not support dual channel lvds too!!!) or is back-ported from kernel ?
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<vicpt> Hello all
<vicpt> I have built u-boot from source (according to wiki instructions) for an a33 tablet board, installed it to a sdcard to then boot a linux image from sdcard.
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<vicpt> Tried and it boot as expected. The problem is when I try to boot the OS with a keyboard (or any other usb device) attached via usb otg cable, it refuses to boot and reset the cpu over and over again.
<vicpt> I have almost no info since it immediately resets, any ideas about what can be causing this?
<paulk-leonov> silviop, yeah I'm confident about extracting the commands
<paulk-leonov> silviop, and it goes directly in a driver, it's neither hardware description nor a firmware but an init sequence
<paulk-leonov> silviop, no native DSI support in u-boot as far as I know
<silviop> vicpt what version of uboot ?
<vicpt> I have built it few days ago
<vicpt> let me check
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<silviop> I have a three A33 q8 tablet , but you reboot in kernel stage or in uboot stage ?
<silviop> mripard do you fell you will backport MPIDSI support to uboot ?
<mripard> I don't plan to work on it, no
<vicpt> <silviop> 2018.09-rc2
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<silviop> vicpt do you see any output or only reboot ?
<vicpt> silbio I'm not exactly sure about what you are asking but I think I'm boot in uboot
<vicpt> silviop*
<vicpt> I can see output, in fact I can even stop the boot process
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<vicpt> and use the keyboard
<silviop> ok so you can edit uboot command line , so is kernel that reboot ?
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<vicpt> I think yes
<vicpt> its very quick
<vicpt> I'm not sure if it is uboot yes doing something
<vicpt> or if it is in kernel stage
<vicpt> I'm having output via lcd screen
<silviop> you read output from serial port or display ?
<vicpt> because I have no idea about serial pinout on this board
<silviop> do you know board model ?
<vicpt> It was a tablet one day
<vicpt> now it is just a board and the lcd
<vicpt> let me check the board for some references
<vicpt> Its not much but is what I get: M86_MB V2.0
<vicpt> printed on board...
<DonkeyHotei> i have such a tablet atm
<DonkeyHotei> oh, yours says v2.0
<vicpt> <DonkeyHotei> Its the same board model?
<vicpt> yes its 2.0
<vicpt> not the 1.0 version
<mripard> vicpt: there's a bug currently in the USB code, the PR has been sent today
<silviop> mripard: uboot or kernel code ?
<vicpt> <mripard> Ohh that explains it
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<DonkeyHotei> mripard: kernel, or u-boot?
<vicpt> btw without any usb device connected I can boot normally without any problems
<vicpt> but since I have no idea about the serial pinout on this board I can't do nothing
<silviop> tablet share serial with sd card you cannot do anything
<vicpt> oh
<DonkeyHotei> you could use an sd breakout, but you'd need to change fex/dtb
<vicpt> any info on wiki about it?
<silviop> if uboot work and support lcd is better to start from uboot to debug
<mripard> silviop: DonkeyHotei: hu?
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<silviop> mripard bug is in uboot or in kernel ? Is not clear
<DonkeyHotei> mripard: the PR -- for u-boot, or the kernel?
<mripard> well, vicpt was talking about U-Boot
<vicpt> I was...
<vicpt> still I'm not sure about what is going on since it is to fast read
<vicpt> need to try get a picture or something
<silviop> vicpt make a video and play slow , sometimes help me
<DonkeyHotei> do you have a link to the PR directly?
<vicpt> Still if I press some key to stop the boot process I can enter in uboot shell
<vicpt> and run commands with the keyboard
<silviop> ok so uboot work!! Great
<vicpt> will try to get some pictures to try understand the output during the reset
<pgreco> do you prefer a r40-v40-common ?
<vicpt> brb
<silviop> you can use older kernel , 4.14 should be fine i use on my a33 tablets
<silviop> and in kernel you can add delay in boot process
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<mripard> pgreco: I don't really see the point to merge both actually
<pgreco> mripard, mainly sync
<pgreco> it could just be a patch to update m2berry to m2ultra level
<wens> just updating them would be fine
<wens> *separately
<pgreco> ack, thanks
<vicpt> I have some output captured in pictures
<vicpt> If anyone want to take a look
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<vicpt> The pictures are not perfect but it was what I could get
<vicpt> its very tricky to get pictures in that exact moment since it resets very quickly
<silviop> can you show boot.cmd
<wens> vicpt: use the latest master from u-boot-sunxi (u-boot custodian repo), and use older toolchains
<wens> vicpt: gcc 6 / binutils 2.30
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<vicpt> <silviop> I have a already compiled boot.scr and it is in the sdcard
<vicpt> If I'm not wrong it was built according to wiki instructions
<vicpt> for mainline kernel
<vicpt> <wens> I was using the mainline u-boot
<vicpt> <wens> will try the u-boot-sunxi
<silviop> do you have put all debug features in kernel (CONFIG_EARLY_PRINTK) ?
<vicpt> I don't have the my configs here anymore
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<vicpt> and I don't remember
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<vicpt> I will try to build it again
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<vicpt> but if its not a standard debug config, I probably did not
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<vicpt> <wens> do you know any older toolchain already compiled for x86_64 ?
<silviop> May be power supply related ? We analize software but he say that only change is a USB keyboard that i suppose is powered from battery
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<vicpt> <silviop> Exactly, it was first thing I thought
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<vicpt> <silviop> And yes its been powered by battery
<vicpt> but if I boot it in android mode, it boot correctly without any problems with the keyboard attached
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<vicpt> Will try build u-boot-sunxi and sunxi-3.4 kernel and see what I can get...
<wens> vicpt: you can get prebuilt toolchains from linaro: https://releases.linaro.org/components/toolchain/binaries/
<vicpt> <wens> Thank you
<vicpt> <wens> What version do you recommend?
<wens> 6.x for now
<vicpt> ok
<wens> 7.x might or might not work
<vicpt> will try 6.4 from 2018.05
<vicpt> or is it so much new?
<vicpt> nevermind I will se by myself ;)
<silviop> A33 tablet with 1Gb of RAM ?
<silviop> Quite unusual
<vicpt> <silviop> yes
<silviop> can you post a photo of pcb
<vicpt> its not a tablet anymore
<vicpt> I just have board plus the lcd
<silviop> PCB means board
<vicpt> in fact it means printed circuit board
<vicpt> I know what you mean
<vicpt> ;)
<vicpt> give me few minutes and I will
<vicpt> I'm just preparing things to build uboot and kernel again
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<vicpt> <silviop> Just a correction, when you asked me about u-boot version I told you I have compiled from linux-sunxi sources in fact it wasn't from there it was from official u-boot repo http://git.denx.de/
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<vicpt> I was using both u-boot and kernel both from mainline not sunxi legacy
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<vicpt> now I will try build from linux-sunxi repos
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<wens> there is no reason to try legacy
<wens> all u-boot progress is in upstream u-boot
<wens> vicpt: the custodian tree is here: https://git.denx.de/?p=u-boot/u-boot-sunxi.git;a=summary
<vicpt> <wens> Thanks
<vicpt> <wens> Will clone from there then
<vicpt> this time with gcc 6.4
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<vagrantc> "all u-boot progress is in upstream u-boot" ... such a beautiful thing to hear
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<vicpt> Done
<vicpt> Now it boots with usb devices attached
<vicpt> although the keyboard is not recognized by the OS but this is another story...
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<vicpt> gonna try new kernel and see if it boots
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<vicpt> now seems after booting the kernel I stop to have power in otg usb
<vicpt> During u-boot stage usb device keyboard is detected, and I can use it normally in u-boot shell
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<vicpt> but if it proceeds to kernel booting, seems usb stop working (apparently it stops powering the usb)
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<vicpt> the board is being powered by battery, since it has only a usb port I can't charge it while using the otg cable
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<vicpt> no idea what can be causing this issue, need to try powering the usb externally or something...
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<vicpt> wens: I have noticed that sunxi-3.4 (stable) kernel hasn't a default config for A33 (sun8i)
<vicpt> wens: Do you know any branch of sunxi-3.4 kernel with A33 support?
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<vicpt> apparently sunxi-next branch has, but it is basically a fork of mainline
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<vicpt> will try build sunxi-3.4 stable for sun7i and see if it boots
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<DonkeyHotei> 3.4 on A33 does not really work
<vicpt> DonkeyHotei: Thanks to save my time
<vicpt> :)
<vicpt> Well I have no idea what can be causing such issue so for now I will give up
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<vicpt> ohh while checking sunxi default config for mainline kernel I have noticed that usb otg support is not enabled by default
<vicpt> I'm gonna generate new config with otg support enabled and build new kernel
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<silviop> you must put in dtb only host option on usb , i never found how to work OTG in linux-sunxi
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<silviop> in mainline kernel
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<vicpt> silviop: Hi and welcome back
<vicpt> silviop: but what about mainline kernel, can you use otg in your a33 tablets?
<silviop> Never used OTG, only usb HOST mode
<vicpt> oh
<vicpt> I think I have read something about it in wiki
<vicpt> but it was for linux-sunxi kernel
<vicpt> do you know how to configure it in mainline kernel?
<silviop> there is some incompatibilities in tablet wiring
<vicpt> I see...
<silviop> you have to add in usb node in sun8i-a33-q8-tablet.dts and specify usb host only
<vicpt> in fact on wiki in a page related to usb otg and charging here: https://linux-sunxi.org/USB_OTG_Charging_Hub
<vicpt> says something about configuring kernel to do host only
<vicpt> but it is for sunxi-3.4 kernel
<vicpt> oh thank you
<vicpt> I will do it in my next build (I'm building a different one right now)
<vicpt> btw silviop I did upload the board pictures you requested...
<silviop> i don't remeber if usb port is usb0 or usb1
<silviop> node in dts
<vicpt> I have removed the pictures meanwhile, but if you are interested I can reupload again
<vicpt> about the dts I will give it a look
<silviop> &usb_otg { dr_mode = "host";status = "okay";
<silviop> };
<silviop> something like this
<vicpt> silviop: thanks
<silviop> i dont' remeber if is usb0 usb1 or usb_otg
<vicpt> will edit it
<silviop> you can add it in yout tablet dts , not edit dtsi!!
<vicpt> do I need any extra reference to port number?
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<silviop> usb0 usb1 usb_otg are only labels , they are difined in dtsi files
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<silviop> they are nodes with properties that are passed to MUSB driver
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<silviop> the property dr_mode say to MUSB to not use the port as otg but only as master
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<silviop> or host
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<vicpt> exactly, now I see, its defined in sun8i-a33.dtsi
<vicpt> ok
<vicpt> gonna edit my .dts and try build it again
<vicpt> brb going to a new round :P
<silviop> i suppose you only need to add two lines at the end of your dts
<vicpt> well according to my own indentation 4
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<silviop> let we know
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