#linux-sunxi on 2013-04-14 — irc logs at freenode.irclog.whitequark.org

2013-02-22 09:54 ChanServ changed the topic of #linux-sunxi to: Allwinner/sunxi development discussion - Don't ask to ask. Just ask! - See http://linux-sunxi.org | https://github.com/linux-sunxi/ | Logs at http://irclog.whitequark.org/linux-sunxi

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01:07 <vinifm> someone has compiled the kernel lately?

01:10 <vinifm> http://pastebin.com/DUkbbKFz

01:14 <Turl> vinifm: 3 or 3.4?

01:15 <vinifm> stage/sunxi-3.0

01:15 <vinifm> sunxi-3.0 as well

01:16 <vinifm> sunxi-3.0 too

01:22 <Turl> vinifm: do you have CONFIG_GPIOLIB enabled on .config?

01:23 <vinifm> let me see

01:24 <vinifm> # CONFIG_GPIOLIB is not set

01:24 <vinifm> no

01:27 <Turl> the spi driver uses it for eint

01:27 <Turl> so it should be enabled

01:28 <vinifm> ok

01:29 <Turl> this commit https://github.com/linux-sunxi/linux-sunxi/commit/bfecd6d2258990c76893865170d03b20eaefbf13

01:30 <Turl> please mail a bug report to the ML with that info

01:33 <vinifm> Turl, the bug is related to the patch?

01:34 <Turl> yes

01:34 <Turl> you have gpiolib off

01:34 <Turl> and that patch uses it

01:34 <Turl> the spi driver should force gpiolib on or something of sorts

01:34 <Turl> I don't know what's the best solution

01:35 <Turl> vinifm: for now, as a workaround, you can enable gpiolib manually and choose the sunxi one on the submenu and it should work

01:36 <vinifm> ah, it's ok

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14:06 <hipboi> hi guys

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14:14 <WarheadsSE> herro

14:14 <WarheadsSE> Btw, cubie workin well for Arch

14:17 <WarheadsSE> hipboi: what is this I hear about an a20 variant?

14:18 <hipboi> yes

14:18 <hipboi> we will made some engineer samples and send to developer here

14:25 <WarheadsSE> Oh, nifty. IIRC, they are 98% pin compatible

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15:28 <wingrime> ssvb:ping

15:28 <wingrime> hramtach:ping

15:31 <wingrime> questions: 1) PLL6 - used for that? what freq it have by default?

15:32 <wingrime> 2) we can use AVS as clocksource but it have 24 Mhz timing only

15:32 <wingrime> and can be devided

15:32 <wingrime> *divided

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16:44 <Turl> wingrime: let me check, I think it was sata

16:51 <wingrime> Turl: we can use some other timer as clocksource ?

16:51 <wingrime> we have 5 general timer avs and 64bit

16:52 <Turl> it looks like sata and maybe some usb use pll6

16:52 <Turl> wingrime: you should ask the guys who worked with xenomai

16:52 <Turl> they worked with that quite a bit for real time :)

16:52 <wingrime> xenomai?

16:52 <Turl> real time patches for linux

16:53 <wingrime> may be interesing

16:53 <wingrime> I don't know what to do with my dma patchset

16:53 <Turl> I don't recall who they were though :( they're probably on #olimex if you want to ask

16:53 <Turl> wingrime: why?

16:54 <wingrime> Turl: I can't clearly say that it have "speed up"

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16:55 <wingrime> inconsistent information

16:55 <wingrime> expecly from hramrach

16:55 <wingrime> but it not first time he test all wrong whay

16:56 <wingrime> *way

16:56 <wingrime> I can say it have "some" speedup

16:56 <wingrime> for me

16:56 <wingrime> oli3vr have simular info

16:57 <wingrime> I need more people for majority

16:58 <wingrime> https://github.com/wingrime/linux-sunxi/commits/dma-rework

16:58 <Turl> wingrime: is anything broken by it?

16:58 <wingrime> realy not noticed

16:59 <wingrime> I moved cache invalidation to "end of transaction" from drivers

16:59 <Turl> https://github.com/wingrime/linux-sunxi/commit/fdd8d97b4bf0404d5bc0db07aac0d5c7dbdba8ae

17:00 <Turl> timeout becomes way longer when you do that

17:00 <wingrime> not always

17:01 <wingrime> schedule() not always do schedule

17:01 <wingrime> it simply say kernel do schedule when need

17:01 <wingrime> as I understand

17:01 <wingrime> I may be wrong

17:02 <wingrime> but wait_event_timeout macro use it in cycle

17:02 <Turl> yeah but if you have a lot of schedulable tasks and run schedule 0xffff times you'll wait a lot more I think

17:03 <wingrime> If I right it must rise UI respone

17:03 <Turl> (assuming the command went wrong though, which kind of is a corner case)

17:03 <wingrime> it simply lower direct preformance and make kernel more responcible (we have may simular problems)

17:03 <wingrime> *responcible

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17:04 <Turl> wingrime: I have tuesday morning free, I'll see if I can give it a try and report back

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17:05 <wingrime> http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/include/linux/wait.h#L208

17:05 <wingrime> see

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17:05 <wingrime> may be better use wait_event

17:06 <wingrime> but

17:07 <wingrime> we need do wake_up somewhere

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17:09 <wingrime> Turl: I looking for better solution with busy wait

17:10 <wingrime> Turl: you need sunxi:wemac: remove unused dma irq poll code sunxi:dma: optimize irq handling code sunxi:dma: do d-cache invalidation on transaction end

17:10 <wingrime> 3 patches for fist testcase

17:10 <wingrime> and sunxi:nand: remove busy-waits form sunxi nand driver sunxi:mmc try avoid busy-wait

17:11 <wingrime> for second testcase

17:12 <wingrime> Turl: can you see better solution for busy wait fix?

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17:19 <Turl> wingrime: have you measured how many loops of busy wait you get?

17:20 <Turl> printk("busywaited %d loops", 0xffff-timeout) or sth like that after it

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17:24 <wingrime> nop but may be use jiffers for it?

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20:23 <wingrime> wtf Horsecock

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