#linux-sunxi on 2019-09-11 — irc logs at freenode.irclog.whitequark.org

2018-08-03 10:18 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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10:15 <wens> slapin: we (Hans and I) already asked Silead. They are fine with people hosting and sharing it, but they will not give a formal statement or license saying it is ok

10:18 <wens> we already have a little bit of information about silead and GSL1680 on the wiki

10:18 <wens> http://linux-sunxi.org/Touchscreen#Silead

10:18 <wens> and http://linux-sunxi.org/GSL1680

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11:02 <libv> wens: cool, seems like you and slapin should expand what you have, let me know what you need from the github project

11:12 <wens> the gsl-firmware project should probably stay where it is. It also has a bunch of firmware from Intel-based tablets that we probably don't care about

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11:13 <wens> we could maybe fork and mirror it though

11:13 <libv> sounds good

11:14 <libv> "load this firmware from this git repo" for either the gsl or the device page, is what we should have

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12:49 <tdebrouw> good afternoon

12:49 <tdebrouw> (at least for me :P)

12:50 <tdebrouw> I was sniffing through the code of the i2s interface

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12:50 <tdebrouw> sound/soc/sun4i-i2s.c

12:51 <tdebrouw> and I'm looking at the sun8t_a83t_i2s_quirks

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12:52 <tdebrouw> (mainline)

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12:52 <tdebrouw> In the quirks, there is a description of specific fields

12:52 <tdebrouw> example:

12:52 <tdebrouw> .field_fmt_wss= REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),

12:52 <tdebrouw> .field_fmt_sr= REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),

12:53 <tdebrouw> more specific:

12:53 <tdebrouw> static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {

12:53 <tdebrouw> ......

12:54 <tdebrouw> .field_fmt_wss= REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),

12:54 <tdebrouw> .field_fmt_sr= REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),

12:54 <tdebrouw> ....

12:54 <tdebrouw> }

12:54 <tdebrouw> so, the a83t registers

12:54 <tdebrouw> If I compare these with the datasheet / user manual

12:54 <tdebrouw> there seems to be a mismatch?

12:55 <mru> allwinner datasheets are frequently wrong

12:55 <tdebrouw> crap

12:55 <mru> don't know if this is one of those instances

12:55 <libv> tdebrouw: what problem are you trying to solve?

12:56 <mru> if the code works, I'd say it's more likely correct

12:56 <tdebrouw> I'm actually trying to get I2s working on the V40 (not yet present)

12:56 <tdebrouw> and I was comparing code with datasheets

12:56 <libv> tdebrouw: what does the git history state about those register bits?

12:57 <tdebrouw> the a83t code shows wss in bytes 2->3, the datasheet claims it's 0->2

12:57 <libv> if there are no hints about it possibly being off in git history, then send an email to the mailing list.

12:57 <libv> not code.

12:57 <libv> history.

12:58 <libv> irc is not the place for such a request

12:58 <libv> and CC the guy who committed that code

12:58 <tdebrouw> I have no intention to request something

12:58 <libv> ?

12:58 <tdebrouw> I was wondering where I'm wrong

12:59 <libv> pffff.

12:59 <tdebrouw> I assume I might not see something

12:59 <libv> then go and look at git blame for those lines and figure out how those came into existence

12:59 <libv> then, if the specific commit that introduced it does not describe the difference

13:00 <libv> send an email with the author of the commit in CC to our mailing list

13:00 <libv> to me, this seems like the standard way of dealing with such an issue

13:00 <tdebrouw> I'm new to this

13:00 <libv> and i doubt that i am speaking a different language than you are atm.

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13:20 <mru> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=21faaea1343f2f8dc6539302c92231afc6d999a5

13:25 <libv> wens: ^

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13:44 <codekipper> tdebrouw: The block on the V40 looks the same as what is in the H3 and A64 so you can use the "allwinner,sun8i-h3-i2s" compatible

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14:16 <tdebrouw> it seems my suspicion has already been fixed in linux-next

14:16 <tdebrouw> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=2e04fc4dbf50195262aa5a2ae6d35baa5b598cae

14:16 <tdebrouw> I'm sorry to have bothered you

14:18 <libv> tdebrouw: did codekipper solve your issue?

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16:18 <tdebrouw> codekipper: thanks for the pointer

16:19 <tdebrouw> allwinner,sun8i-h3-i2s is indeed compatible with the V/R40

16:20 <tdebrouw> I was lacking "simple-audio-card,mclk-fs = <512>;"

16:20 <tdebrouw> but it's working now, so thanks

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16:44 <jernej> that sounds like you're trying to make HDMI audio work :)

16:50 <tdebrouw> well, i was trying to connect a max 98357A to i2s0 - to hear some audio

16:51 <tdebrouw> i added a simple-audio-card

16:52 <tdebrouw> not sure if that is the correct way though :)

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17:18 <wens> tdebrouw: the a83t manual only describes the TDM block. the other I2S blocks which the driver does support is not described

17:19 <wens> tdebrouw: it is

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17:52 <tdebrouw> wens: thx

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21:14 <jernej> wens: is it assumed by RTC driver that all boards have external 32.768 kHz crystal? AFAICS, only about half H3 boards have it.

21:15 <jernej> this may be masked by LOSC_AUTO_SWT_EN bit, which is by default set to 1

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23:40 <wens> jernej: :/