#linux-sunxi on 2015-10-22 — irc logs at freenode.irclog.whitequark.org

2015-02-18 19:37 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

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07:34 <rellla> libv: ack.

07:34 <rellla> maybe we should change Upstream/Mainline to Mainline/Upstream oder simply mainline?

07:36 <NiteHawk> i second that. "upstream" can be more or less anything that your repo 'follows'. "mainline" IMHO makes it clearer that we're referring to the 'official' sources

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08:01 <libv> rellla: mainline is a misnomer

08:02 <libv> it means the top of the linux kernel, while this is definitely not true. some devices are mostly supported for quite some time already

08:04 <libv> "upstream" of something is just as defining as "mainline" of something

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08:04 <libv> but everyone talks about upstreaming when talking about bringing stuff back to the linux kernel or uboot

08:04 <rellla> "official"

08:05 <wens> Allwinner's "official" kernel... :p

08:05 <libv> :)

08:05 <libv> i personally hear upstream more than i hear mainline

08:07 <rellla> for me as a noob (two years ago), mainline is the head of torvalds kernel https://www.kernel.org/

08:07 <rellla> upstream is some code i refer as upstream in my git repo, because it's something that is relatively upon sth. :p

08:07 <mripard> maniline is linus branch

08:08 <mripard> it doesn't carry any information regarding exactly where in the branch though

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08:16 <rellla> "mainline" is the more used one in our wiki http://linux-sunxi.org/index.php?title=Special%3ASearch&profile=default&search=mainline&fulltext=Search

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08:20 <mripard> it's also the one used on kernel.org, distros, etc.

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08:32 <libv> ok.

08:32 <libv> wiki will be adjusted.

08:32 <mripard> jemk: thanks for sending that new version btw

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08:56 <wens> mripard: should we add mmc aliases for boards that have emmc?

08:58 <mripard> wens: are they taken into account ?

09:00 <mripard> it doesn't look like they are

09:06 <vpeter> My point exactly.

09:09 <wens> hmm, nope :(

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09:14 <mripard> did I miss some part of a discussion ?

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09:18 <wens> mripard: none that i can tell

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09:30 <mripard> ok, so I was thinking vpeter was commenting about some discussion I wasn't aware of

09:30 <mripard> my bad :)

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09:34 <vpeter> Sorry, seems I accidently post my last response again. My bad.

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10:18 <wens> mripard: come to think of it, it won't solve the case of mmcblock ordering :(

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12:03 <wens> jemk: do you have any orange pi schematics?

12:04 <jemk> wens: yes, opi 2 and opi plus

12:04 <jemk> wens: i think they are on their website in the meantime too

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12:28 <wens> yeah, but need to register

12:31 <plaes> hrm.. funny how there are various SDKs with newer SoC support (H3), but nothing in allwinner-zh github :S

12:38 <wens> it's not the first time that happened

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12:44 <plaes> yeah

12:44 <plaes> like, when it hasn't happened? :)

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12:47 <libv> allwinner only released stuff when under extreme pressure

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13:00 <asmir> Hi; Does anyone know what could cause this error with mainline u-boot and custom board on A20

13:00 <asmir> Could not determine boot source

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13:10 <NiteHawk> asmir: could it be you're mixing u-boot and Allwinners boot0/boot1? rilasta reported something similar - http://irclog.whitequark.org/linux-sunxi/2015-09-16#14024192

13:12 <NiteHawk> or any chance you're also mixing up u-boot.bin and u-boot-dtb.bin? (see http://linux-sunxi.org/Mainline_U-Boot#Troubleshooting)

13:12 <asmir> well I cloned the repo mentioned on the sunxi wiki and than with dd I wrote "u-boot-sunxi-with-spl.bin"

13:12 <asmir> did I do anything wrong here?

13:14 <NiteHawk> no, that should be okay (assuming you're using a correct seek= offset into the storage device)

13:14 <asmir> I used bs=1024 seek=8

13:14 <NiteHawk> which is fine for A20

13:14 <asmir> :\

13:15 <NiteHawk> what u-boot version and which particular device is that?

13:15 <asmir> it's a custom board based on olinuxino lime2 and uboot is "U-Boot SPL 2015.10-rc5-00005-g297facc (Oct 22 2015 - 14:38:27)"

13:16 <NiteHawk> hmm... the error seems a bit unusual. u-boot fails to detect the boot source in spl_boot_device() - https://github.com/u-boot/u-boot/blob/master/arch/arm/cpu/armv7/sunxi/board.c#L187

13:17 <NiteHawk> what's your boot device?

13:17 <asmir> SD card

13:17 <asmir> and yes it's that line

13:17 <asmir> in souce code

13:18 <NiteHawk> is that the default "mmc0" in your case, too - or something unusual?

13:18 <asmir> yes it's mmc0

13:18 <mripard> asmir: do you have CONFIG_MMC enabled ?

13:19 <mripard> either in your .config, or in sunxi-common.h

13:19 <asmir> I'll check, wait a sec

13:20 <asmir> http://pastebin.com/ZBGM1K2j

13:20 <asmir> this are the only options with CONFIG_MMC

13:22 <NiteHawk> check the source - without CONFIG_MMC your u-boot will fail miserably there

13:23 <asmir> hmm, I wonder how did that happen, I used defconfig from lime2

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13:24 <asmir> I'll try to add CONFIG_MMC=y to .config and recompile

13:26 <NiteHawk> it should normally get defined from include/configs/sunxi-common.h

13:27 <asmir> :\ nope, stil doesn't

13:28 <asmir> there is an option to write 2 parts of u-boot with different offset

13:28 <asmir> I'll try that

13:28 <ssvb> asmir: try to insert #error directive in the source code under #ifdef CONFIG_MMC

13:29 <NiteHawk> asmir: i guess that won't help. you need to fix your u-boot

13:29 <ssvb> asmir: this way you will know for sure if these parts of code are compiled in or not

13:29 <asmir> I see; @ssvb I'll try that too

13:29 <ssvb> asmir: if the MMC code is there, then it is either buggy or misconfigured

13:30 <asmir> btw u-boot-sunxi works

13:30 <ssvb> asmir: the BROM is able to load the SPL, so at least the hardware is OK

13:31 <asmir> yep, I know for hardware it boots normaly with sunxi* sources

13:32 <ssvb> asmir: is CONFIG_MMC0_CD_PIN="PH1" a correct choice for your hardware?

13:32 <ssvb> asmir: what happens if you change it to CONFIG_MMC0_CD_PIN="" ?

13:32 <asmir> I did not check that, but I guess it is because it's config for lime2 and my board has same pin layout

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13:32 <asmir> I'll check that too

13:36 <asmir> yep, the pin MMC0_CD_PIN is correct

13:37 <asmir> but why arent MMC1..3 pins set in .config?

13:39 <ssvb> asmir: how many SD card slots do you have?

13:39 <asmir> wait I'm wrong, the pin is not correct

13:39 <asmir> and I have one slot

13:40 <asmir> http://pastebin.com/raw.php?i=hY483ALU

13:40 <asmir> this is fex config for mmc

13:41 <ssvb> asmir: try either "PC22" or ""

13:42 <asmir> k

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13:43 <ssvb> btw, how do you know that your board "has same pin layout" as lime2?

13:43 <asmir> the guy who designed it told me so

13:44 <asmir> I use the sam fex file and with old u-boot most things work normaly

13:44 <asmir> I even booted to graphical environment

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13:44 <asmir> reason because I'm trying with mainline u-boot is network - which doesn't work

13:45 <asmir> and I've read somewhere that it neds some delay with PHY communication to compensate diffrent lengths of RX and TX

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13:46 <asmir> and this delay is presend in mainline u-boot

13:46 <ssvb> or it probably means that your board differs from lime2 in more ways than just mmc pins

13:47 <asmir> according to schematics only pins that differ are led pins

13:48 <asmir> asside from that it also differs in memory routing and some peripherals (which are irrelevant now)

13:49 <asmir> it's better with changed pin !!!

13:50 <asmir> now it halts in kernel I'll fix that

13:50 <asmir> thank you guys

13:50 <asmir> I get:

13:50 <asmir> Error: unrecognized/unsupported machine ID (r1 = 0x100010bb).

13:51 <asmir> oh, I see, I'mm missing a workaround for older kernels in my .config

13:51 <plaes> yea

13:51 <plaes> possibly even patches

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13:54 <asmir> It worked, good that I didn't need to patch it

13:58 <atsampson> could we use a MediaWiki template for the "trivial" kinds of "Sunxi support" section? most of them don't need anything beyond the "it's called X in U-Boot" text...

13:59 <libv> atsampson: people should be encouraged to add caveats

14:00 <libv> atsampson: it is trivial enough as it is

14:02 <atsampson> how about having the U-Boot/Linux device names in the infobox, and making the "Support" section just be the caveats, then?

14:03 <atsampson> then the maintainer's goal is to make it fully supported and as a result get rid of the caveats ;-)

14:03 <ssvb> asmir: what kind of kernel are you using?

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14:03 <asmir> sunxi 3.4

14:04 <ssvb> asmir: from which repository exactly?

14:04 <ssvb> asmir: it has been a bit of a mess lately

14:04 <asmir> I know, it's : https://github.com/linux-sunxi/linux-sunxi.git

14:04 <ssvb> ok

14:04 <asmir> with sunxi-3.4 branch

14:05 <NiteHawk> ssvb: the linux-sunxi one? hey, it's only 33 branches :D

14:05 <ssvb> we should just promote stage/sunxi-3.4 to sunxi-3.4

14:09 <ssvb> afaik, there was only one sloppy bugreport, which lacks credibility - http://comments.gmane.org/gmane.comp.hardware.netbook.arm.sunxi/15458

14:11 <libv> atsampson: infobox are overloaded already, and are just there to describe the hw

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14:14 <asmir> it didn't fix the ethernet, I'll try tomorrow

14:14 <asmir> thank you guys again

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14:47 <rellla> ssvb: as it seems that you want to do some kind of maintaining of sunxi-3.4, may i ask to get some patches merged?

14:50 <ssvb> rellla: well, I don't want to spend much time on it, it's basically in a bugfixes only mode

14:50 <rellla> for example this one https://groups.google.com/forum/#!searchin/linux-sunxi/csc/linux-sunxi/EJ1R66zGoDw/wgwpNTYGbMAJ

14:50 <rellla> bugfix only

14:50 <rellla> :)

14:51 <ssvb> rellla: we have already discussed this before :) basically you need to find at least one person to review your patch

14:52 <rellla> ok. so time will tell :p

14:53 <ssvb> rellla: how can we see the real world impact of this bug and confirm the fix?

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14:54 <ssvb> rellla: the "find at least one person" task should not be very difficult if the bug is really causing troubles for the users

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14:54 <rellla> using an application with enabled csc-handling (bright, constrast ...) via libvdpau-sunxi for example results in faulty colors

14:55 <rellla> i will go for the quest ...

14:56 <ssvb> rellla: just describe how to test your fix (provide step by step instructions), and I believe that it will be tested/reviewed in no time

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14:58 <rellla> ok. but imo it's clear, that the existing code is wrong...

14:59 <rellla> see https://github.com/linux-sunxi/linux-sunxi/blob/sunxi-3.4/drivers/video/sunxi/disp/de_be.c#L961 and https://github.com/linux-sunxi/linux-sunxi/blob/sunxi-3.4/drivers/video/sunxi/disp/de_fe.c#L1385

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15:00 <libv> rellla: feel free to add my Reviewed-by:

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15:01 <ssvb> rellla: it's clear that *tons* of sunxi-3.4 code are wrong in one way or another, but doing shotgun bugfixing is (1) not a productive use of anyone's time and (2) introduces risk of unintended regressions

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15:01 <ssvb> libv: thanks!

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15:01 <rellla> thanks, too

15:02 <libv> finding the email to reply to, would be more work than actually reading through that email thread on google ;p

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15:11 <rellla> ssvb: btw, i like that word "shotgun bugfixing" ;)

15:12 <libv> it does kind of imply that someone else is forcing the bugfixer

15:12 <libv> because he did something less than acceptable

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