#linux-sunxi on 2017-11-13 — 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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02:03 <wens> emac on h3/a83t has been delayed

02:03 <wens> the status matrix has not been updated to reflect this

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05:34 <montjoie> wens: will fix

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05:52 <Saurabh> how can we install wps office in armhf architecture based system?

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06:19 <icenowy[m]> ask kingsoft to build it for armhf

06:25 <Saurabh> so by default its only libre office there for now ?

06:25 <icenowy[m]> yes

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06:42 <kalpana> how do i install WPS softwares on arm??

06:53 <KotCzarny> dont you think its a bit offtopic?

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07:26 <lvrp16> lol

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12:38 <KotCzarny> linuxmaster1: yes, its in the todo

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12:42 <KotCzarny> to the deep orange hole?

12:42 <KotCzarny> whopps, wrong channel

12:42 <KotCzarny> sorry

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13:19 <wens> jernej: any duplication between your a83t csi stuff and the v3s stuff posted on the ML?

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13:45 <megi> wens: you're probably talking about my CSI A83T work

13:45 <wens> megi: uh, right

13:45 <wens> :)

13:46 <megi> wens: my work was based on v2 of patches posted by Mr. Yong

13:47 <megi> wens: he merged some of that back, but not all

13:49 <megi> wens: we'll probably figure some of that out during review, and I'll post some followup patches after/if this is merged

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13:52 <wens> cool

13:52 <megi> wens: BTW, I'm working on AC100 codec support, based on your MFD patches, BSP driver is quite a beast, so I hope to have something simpler

13:53 <megi> I thought of creating a tool for converting some easier to read DAPM graph description into C code

13:54 <megi> I didn't find anything like that on the internet :) Do you know of anything to ease writing DAPM code?

13:55 <megi> It's quite tedious

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13:59 <mripard> wens: isn't the AC100 codec exactly the same one than the one in the A33 ?

13:59 <mripard> but this time off-chip ?

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14:06 <wens> megi: nope

14:06 <wens> mripard: you might be right

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14:07 <wens> megi: you don't have to have everything in place at once you know? just start with playback from afi1 slot0 (the SoC)

14:07 <wens> megi: and skip any of the digital audio processing stuff

14:08 <mripard> wens: I think we had that discussion quite some time ago

14:08 <mripard> but they look really similar

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14:09 <mripard> I guess a good test would be to just use it and see how it goes

14:09 <mripard> you just have to make the driver an rsb driver and it should work

14:09 <mripard> megi: ^

14:09 <megi> wens: yes, I thought I'll start with simple stuff first, but eventually it may grow biger and unwindy and hard to keep together (in my brain :D)

14:11 <megi> mripard: I'll look at it if the register layout is similar and see what I can do

14:11 <mripard> megi: I just did, and it's really similar, and least for the ~20 first registers

14:12 <wens> you have to deal with the register offset step being different somehow

14:12 <mripard> the registers offset are just by increments of 1 instead of 4

14:12 <wens> the regmap stuff might not be able to help you there

14:12 <megi> mripard: also registers are 16 vs 32bits, I think

14:12 <wens> or it could, but you'd have to rewrite the existing offsets >> 2

14:13 <megi> yes

14:13 <wens> both are 16 bits

14:13 <wens> look at the registers starting at 0x200 on the a33, that's the codec

14:13 <wens> everything before that is the soc i2s interface

14:14 <wens> megi: my advice is look at the whole hardware design, i.e. the diagram, to know how to do the dapm stuff, and where you need to leave entry points

14:14 <wens> megi: but otherwise start the driver simple

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14:15 <mripard> megi: the width are, but the significants bits are in both case in the 16 lower bits

14:16 <mripard> so it shouldn't change anything there

14:16 <wens> and this codec is somewhat complicated... we might end up needing scu-card instead of simple-card

14:17 <megi> ok, I'll try it. I'll be doing it on A83T, I don't have anything else with AC100.... I've already patched sun4i-i2s to hopefully support A83T driver https://github.com/megous/linux/commit/8084907b773e590f1b0657de1acace0ee4379498

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14:17 <megi> Allwinner decided it's good idea to swap just two register addresses, and hopefully nothing else

14:17 <megi> :D

14:18 <mripard> classic.

14:18 <wens> it's nothing new... they moved the tx fifo register

14:18 <mripard> it doesn't beat the A31 I2C though

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14:18 <mripard> in the pointless change they ever pulled :)

14:18 <wens> so you get really fast playback (because dma is constantly sending stuff) but no audio

14:19 <megi> heh

14:19 <mripard> (starting with the A31, you had to write 0 instead of 1 to clear an interrupt (or the other way around))

14:19 <mripard> it was the only change they did

14:20 <wens> megi: can I suggest following SPDIF driver, and have the offsets placed in the quirks structure directly?

14:20 <megi> perhaps someone thought writing 1 to clear something was somewhat counterintuitive

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14:20 <megi> wens: sure

14:21 <megi> I'll fix that

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14:23 <wens> looks like regmap only checks the register offset stride, but doesn't provide a way to seemlessly support different strides with the same code

14:26 <wens> might have to ask Mark for suggestions

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14:28 <megi> wens: I guess the question is if it would survive a runtime change of stride

14:29 <wens> one way I can think of working around this is to use custom read/write functions for the mmio (i.e. A33) version

14:29 <wens> these would fix the register offset (<< 2)

14:30 <wens> then change all the defined offsets (>> 2) so they work with RSB

14:31 <wens> does that make any sense?

14:34 <wens> megi: in any case, I'll mark AC100 codec as WiP by you, in case mripard or I forget and we get an itch to do it

14:34 <megi> sure, you can add https://github.com/megous/linux/tree/linux-tbs as a ref where the action is happening

14:35 <wens> I'll look into the SDM clock stuff for A83T later

14:36 <megi> do you know off the top of your head if there's a data path diagram for A33 SoC based codec somewhere, like the on in AC100 datasheet?

14:36 <megi> one

14:37 <megi> nevermind :D

14:37 <megi> found it

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14:42 <megi> it looks similar, it's just missing some outputs - speaker l/r, aux, earpiece, and obviously I2S interface to the SoC... I'll try bolting it on the A33 driver and see where that will get me

14:42 <megi> thanks for the pointers

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14:52 <wens> a64 cpu stuck in tcp stack :/

14:53 <wens> hmm, stuck somewhere ...

14:55 <montjoie> yeah I hit some rcu/hungtask/other on a64 since some days

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15:07 <icenowy[m]> recently I also see strange stucks on A64/H5

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15:18 <montjoie> I hit also some strange internal compiler error

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15:28 <icenowy[m]> internal compiler error may be DRAM issue

15:28 <icenowy[m]> I fixed by downclock OPi Prime DRAM to 624MHz and PC2 to 576MHz

15:29 <montjoie> yes, got it only on pine64

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15:36 <montjoie> but strange it worked before, perhaps recent uboot made DRAM higher ?

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17:22 <smaeul> montjoie: icenowy[m]: do you have timer bug workaround applied on A64?

17:25 <smaeul> fwiw, I've also been having gcc ICE on PC2 for the last few months -- it wasn't a problem back in May/June, but I can't pinpoint exactly when it started

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19:19 <montjoie> smaeul: I have all A53 ERRATA enabled

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19:37 <smaeul> montjoie: this isn't an ARM errata, even though it's with the ARM architectural timer, since the timer is implemented outside the IP block provided by ARM

19:39 <smaeul> there are two different errata workarounds, one freescale/nxp and one hisilicon, in the tree -- both work effectively the same way, by reading the timer twice and making sure the second read is greater than the first

19:39 <smaeul> but not much greater

19:40 <smaeul> anyway, you should enable one and add the appropriate device tree property ala https://github.com/armbian/build/blob/master/patch/kernel/sunxi64-dev/enable-fsl-timer-errata.patch

19:41 <smaeul> otherwise the clock jumps both forward and backward several hundred times per second

19:43 <smaeul> and this causes RCU stalls and hangs, and if your uptime is large enough, the system clock jumping a few centuries ahead :)

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19:47 <montjoie> and why I get it only now, and not before ?

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19:52 <smaeul> I don't know, probably because it's not deterministic, and the jumps are only occasionally large

19:52 <smaeul> that is, the size of the jump is proportional to the most significant changed bit when the timer ticks

19:53 <smaeul> armbian has had a patch for it since March: https://github.com/armbian/build/commit/a08cd6fe7ae95fda5d4552d1c3c1f6794ae704a4#diff-164e89e286ab260a22f8ff3b7809575e

20:02 <montjoie> does it was sent for upstream ?

20:09 <smaeul> no, I was trying to figure out exactly when and how it happened so I could send a patch, but that work is on a hard drive in a box

20:09 <smaeul> because I needed it to work more than I needed to figure out why it was broken

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