#asahi-dev on 2025-03-27 — irc logs at oftc.irclog.whitequark.org

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01:43 <nicolas17> hm maybe the old wiki pages should be edited to link to the new docs

01:45 <nicolas17> https://asahilinux.org/docs/platform/feature-support/m1/#m1-devices should be updated to reflect touchbar is now upstream

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01:46 <nicolas17> but I guess it's not released yet? so would it be "linux-next"?

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02:37 <nickchan> nicolas17: linux-asahi (6.15)

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03:06 <chadmed_> nickchan: nicolas17: ive got a local branch with all the feature support pages cleaned up, just havent had time to do a final check and push

03:06 <nicolas17> oh cool

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06:08 <nickchan> >This can never be upstreamed, however the hope is that this hacked together driver becomes unnecessary at some point in the near future.

06:08 <nickchan> probably not near future

06:09 <nickchan> [cpuidle situtation]

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06:12 <nickchan> or I can take that up myself given a10 and a11 only have el0 and el1

06:13 <nickchan> in any case id rather for the cursed a10 cpufreq to be fully released into mainline first

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10:44 <chadmed> nickchan: yeah... when i wrote that we were eager to get some sort of psci thing working

10:44 <chadmed> that sorta never happened :p

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21:25 <jannau> chaos_princess: have you seen a probe order issue between aop_audio and aop_admac? Not sure if I were just lucky to hit that in 6.14 or if it's a 6.14 driver-core/platform probe change

21:26 <chaos_princess> no, never seen that one before, does aop handle EPROBE_DEFER incorrectly?

21:26 <jannau> issue is likely that nothing enforces the order from the "dmas" for the manual platformdevice creation

21:27 <chaos_princess> should it not do that automatically?

21:28 <chaos_princess> and, like, does it matter? if platform device is created before admac comes up, should it not just probe later?

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21:29 <jannau> not sure how the error is propagated. it ended up with returning -EIO

21:32 <chaos_princess> anything else in dmesg?

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21:34 <jannau> the platform/of probe code uses some properties like iommus, dmas, ... for probe ordering. I've worked with https://paste.centos.org/view/8db1f78f around for now

21:35 <chaos_princess> can you still look in dmesg, and how exactly is it failing?

21:35 <jannau> fasiled to get dma channel, than aop syslog pdm errors. let me see if I can reproduce it

21:36 <chaos_princess> "Unable to get dma channel", something something?

21:36 <chaos_princess> if so, that is enough

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21:37 <jannau> yes, unable to get dma channel. failed to attach devicem and than probe failed with -5

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21:42 <chaos_princess> ok, yep, thats a case of someone (me) not handling eprobe_defer correctly. would be annoying to fix though unfortunatelty

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21:51 <jannau> reproduced without pdm syslog messages: https://paste.centos.org/view/1ac5e5a1

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21:57 <chaos_princess> jannau: mind adding a debug print to https://github.com/AsahiLinux/linux/blob/asahi/sound/soc/apple/aop_audio.rs#L517, and telling me how many times that gets called?

21:58 <chaos_princess> (without your fixes, ofc)

22:00 <jannau> do you expect it to be called more than once? I'd be surprised if it did

22:01 <chaos_princess> i wouldn't be

22:02 <jannau> it's only called once

22:02 <chaos_princess> interesting

22:02 <chaos_princess> only once and fails?

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22:10 <jannau> yes

22:15 <chaos_princess> i just do not understand how you got the output above then. "Unable to get dma channel" is printed from https://github.com/AsahiLinux/linux/blob/asahi/sound/soc/apple/aop_audio.rs#L377 , which is called here https://github.com/AsahiLinux/linux/blob/asahi/sound/soc/apple/aop_audio.rs#L595 and since it got an error, it should exit both SndSocAopData::new and SndSocAopDriver::probe.

22:15 <chaos_princess> but "Unable to attach device 1885629744..." is an error from line https://github.com/AsahiLinux/linux/blob/asahi/sound/soc/apple/aop_audio.rs#L673

22:16 <chaos_princess> like, i do not see the way to get the output above w/o calling probe() twice?

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22:24 <jannau> from_err_ptr(ERR_PTR(-PROBE_DEFER)).is_err() is false?

22:25 <jannau> no

22:26 <chaos_princess> cant be, otherwise https://github.com/AsahiLinux/linux/blob/asahi/sound/soc/apple/aop_audio.rs#L377 wouldnt get hit

22:31 <jannau> the audio device is created before SndSocAopDriver::new(). that's the last call in probe. not to confuse with SndSocAopData::new() which is called earlier

22:32 <chaos_princess> oh

22:32 <chaos_princess> aaaa

22:32 <chaos_princess> ok, how many times is probe called

22:34 <jannau> I'm still confused. probe() is only called once but `let dma_chan = data.request_dma_channel()?;` doesn't return. a print on the next line is seen in the log

22:38 <chaos_princess> i am so confused too

22:38 <chaos_princess> like, ok, i got that wrong at first and dma channels are probed after aop devices are attached

22:38 <chaos_princess> but, like, why is there a dma attach fail first, and then a aop attach fail?

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