#linux-sunxi on 2016-10-31 — 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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10:47 <tkaiser> apritzel: No idea regarding Theobroma

10:47 <apritzel> tkaiser: OK, thanks, will try to ask them ...

10:48 <apritzel> tkaiser: I was just curious, but I am afraid they use a newer Allwinner drop, Pine64 also hinted at 4.x based AW kernels a while ago

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10:53 <tkaiser> apritzel: Did you look into this tinalinux thing already?

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10:54 <apritzel> tkaiser: only very briefly, but that was 3.4 and 3.10 kernels only anyway, right?

10:55 <tkaiser> apritzel: Yes, and u-boot and Android and OpenWRT also outdated like hell. Hard to believe there's someone working on 4.x

10:56 <apritzel> tbh to me that seems like an approach to repaint the BSP kernel

10:57 <apritzel> and to avoid people complaining, because they only advertise TinaLinux compatibility

10:59 <apritzel> because that is what we need: yet another SoC specific Linux distro !!1!!1!

10:59 <jelle> :P

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11:03 <tkaiser> apritzel: Well, for their A80 based SoM they also claim 'Linux 4.x' and advertise the module for 'Visualization and Kiosk'. And list SATA for the module...

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11:04 <apritzel> tkaiser: yes, but I was thinking that they could base on the upstream bits for A80 and A31

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11:05 <apritzel> so the A64 claim could just be a copy&paste bug

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11:48 <agraf> apritzel: theobroma has a good chunk of linux knowledge in house, so there’s a good chance they use some 4.x non-bsp kernel

11:49 <apritzel> agraf: well, I was hoping so

11:49 <agraf> apritzel: but really, just ask them: philipp.tomsich@theobroma-systems.com

11:49 <agraf> apritzel: tell him i sent you ;9

11:49 <agraf> ;)

11:49 <apritzel> agraf: ah, cheers, I only found sales@ ;-)

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11:53 <wens> apritzel: theobroma has a git repo in case you're worried :p

11:53 <wens> apritzel: https://git.theobroma-systems.com/armadillo-linux.git/

12:03 <apritzel> wens: thanks for that pointer, though this seems to have only A80 bits in

12:03 <apritzel> wens: including many patches from you

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12:09 <wens> yes it seems they took a version of mainline and added more stuff

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14:55 <oliv3r> ssvb: all boards survived the weekend @456 MHz

14:55 <oliv3r> 2 buts, the ones that i had a monitor connected to, where with very choppy spinning cubes

14:56 <oliv3r> i'm guessing some float that overran? restarting the test fixed the render speed

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14:56 <oliv3r> the other but is, every once in a while, i see some kind of checkerd 'wash' over the screen

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14:56 <oliv3r> kinda like some blur shader or something

14:56 <oliv3r> it sits there for only a few frames, so hard to document

14:56 <KotCzarny> setup a camera?

14:57 <KotCzarny> ;)

14:57 <oliv3r> i'm too lazy for that!

14:57 <KotCzarny> i wonder what might be it, maybe some emi?

14:57 <oliv3r> it happens very very rarely

14:57 <oliv3r> once every few minutes maybe

14:57 <KotCzarny> ie. external interference on hdmi cable

14:57 <oliv3r> my initial guess was, unstable memory bus, but stable enough to not cause any stalls?

14:58 <oliv3r> also that is possible btw

14:58 <oliv3r> i have 2 monitors running atm

14:58 <oliv3r> so i should double check the other one too

14:58 <KotCzarny> try switching the monitors or boards

14:59 <oliv3r> well first see if it happens on both, not just the one :)

14:59 <KotCzarny> though hdmi should be digital, so it might be something in monitor itself

15:00 <oliv3r> it's not a perfect pattern

15:00 <oliv3r> it's like washing out each macro block

15:00 <oliv3r> kinda looksl ike jpeg artifact

15:00 <KotCzarny> auto monitor calibration?

15:00 <KotCzarny> when signal reconnects after some spike?

15:01 <oliv3r> that's vga

15:01 <oliv3r> i think

15:01 <oliv3r> i'll try to video it :p

15:01 <oliv3r> to please oyu

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15:10 <oliv3r> and i can't see it anymore now

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15:47 <oliv3r> 45 C ambient temperature in my heated chamber

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15:47 <KotCzarny> burn baby, burn

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15:58 <oliv3r> i took pics of my ghetto setup :D

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15:59 <oliv3r> temp1_input however of the hwmon is stuck at 504000 so i doubt that's properly working

16:00 <oliv3r> (3.4 kernel)

16:01 <KotCzarny> you can try running sunxi-temp

16:02 <KotCzarny> sunxi_tp_temp

16:02 <oliv3r> 63.6

16:02 <oliv3r> that's more accurate :D

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16:57 <ssvb> oliv3r: the jpeg-alike artifacts are perfectly normal, the point is that this test does not try to synchronize to screen refresh, that's why you get tearing

16:57 <ssvb> and tearing defects look like square blocks because mali is a tiled architecture

16:58 <ssvb> the choppy animation which gets fixed by restarting the test is somewhat unexpected though

16:59 <ssvb> you could probably record some video just to show how it looks

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17:00 <ssvb> in any case, even though the boards do not seem to fail the test at 456MHz DRAM clock speed, it is unreasonable to use anything higher than 432MHz in production

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17:02 <ssvb> unless you try to enable odt, then tweak zq, emr1, tpr3 and do other adjustments as described in https://linux-sunxi.org/A10_DRAM_Controller_Calibration

17:04 <ssvb> but that would be the optional 'tuning' stage, while you probably only have enough time to just do basic 'validation' and stop at this point

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19:16 <vagrantc> is anyone working on cubieboard4 support for mainline u-boot? looks like several A80 bits just landed in mainline u-boot, but for the merii-a80-optimus board

19:17 <vagrantc> seems like SPL and SMP for A80 are there, though ...

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