Message-ID: <20181102111558.lw67jfyhfneqzhl4@picard>
Date:   Fri, 2 Nov 2018 11:15:58 +0000
From:   Dean Wallace <duffydack73@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk <linux-clk@...r.kernel.org>,
        Stable <stable@...r.kernel.org>,
        Johannes Stezenbach <js@...21.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mogens Jensen <mogens-jensen@...tonmail.com>
Subject: Re: Regression found (Stop-marking-clocks-as-CLK_IS_CRITICAL)

On 02-11-18, Hans de Goede wrote:
> Hi,
> 
> On 01-11-18 16:50, Dean Wallace wrote:
> > On 01-11-18, Hans de Goede wrote:
> > > Hi,
> > > 
> > > On 01-11-18 15:28, Dean Wallace wrote:
> > > > On 01-11-18, Hans de Goede wrote:
> > > > > Hi,
> > > > > 
> > > > > On 01-11-18 11:37, Dean Wallace wrote:
> > > > > > On 31-10-18, Pierre-Louis Bossart wrote:
> > > > > > > 
> > > > > > > > Just thought it worth mentioning, this new patch that fixes sound
> > > > > > > > again, seems to have ressurected an old issue with PLL unlock.  I'm
> > > > > > > > seeing journal entries after fresh boot ......
> > > > > > > > 
> > > > > > > > ```
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard systemd[462]: Started Sound Service.
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > picard kernel: max98090_pll_work: 141 callbacks suppressed
> > > > > > > > picard kernel: max98090 i2c-193C9890:00: PLL unlocked
> > > > > > > > ```
> > > > > > > > 
> > > > > > > > sound is ok, but sometimes plugging in headphones spams journal with
> > > > > > > > those PLL messages, and sound turns into "daleks", and I have to
> > > > > > > > remove/insert headphones few times or stop/start audio to fix it.
> > > > > > > > It's a very old issue, maybe you'd know more about it.
> > > > > > > 
> > > > > > > I noticed this error on my Orco device used for tests many moons ago, but I
> > > > > > > could never find out what led to this error case, it wasn't deterministic
> > > > > > > and didn't impact the audio quality. All I could do is rate_limit it... If
> > > > > > > we have an A vs. B situation it'd be really helpful to diagnose further.
> > > > > > > 
> > > > > > > Is there really a causality between the changes from Hans and this PLL
> > > > > > > unlock error? Are you 100% sure this was not present in the previous install
> > > > > > > you used (4.18.14 as mentioned earlier in the thread)?
> > > > > > > 
> > > > > > > Thanks
> > > > > > > 
> > > > > > > -Pierre
> > > > > > > 
> > > > > > Well, numerous boots, kernels, headphone inserting - no PLL or
> > > > > > 'Daleks'.  My laptop must have been haunted that day (halloween).
> > > > > > I'll put it to bed.
> > > > > 
> > > > > So you can no longer reproduce. Bummer. Note this might be caused by
> > > > > the temperature of the laptop when you were running the tests...
> > > > > 
> > > > > Anyways if you hit this again and you can reproduce it, please
> > > > > give adding a msleep(10) after code mucking with the clk a try.
> > > > > 
> > > > > Regards,
> > > > > 
> > > > > Hans
> > > > > 
> > > > Right then, I can make it unlock and 'daleks' by going into
> > > > pavucontrol and switching the Profile back and forth from Stereo
> > > > Output to Stereo Output+Analog Mono Input, which is actually something
> > > > I've done to make it correct itself as well.  I don't use the mic or
> > > > anything so I've had it set to Stereo Ouput only which I 'think' has
> > > > somehow made it more stable for me.  With all my playing around, one
> > > > of the things I did was clean out my .config/pulse folder which meant
> > > > by default the 'Profile' in pavucontrol was set to Output+Input, which
> > > > seems to help trigger the PLL issue when inserting headphones.
> > > > 
> > > > So what would you like me to do, as I can trigger it on demand it
> > > > seems.
> > > 
> > > Please give the attached patch a try (on top of my patch for the clk quirk)
> > > and let us know if that fixes these errors.
> > > 
> > > Regards,
> > > 
> > > Hans
> > > 
> > Sorry, it's not being consistent with me  Now, fresh boot again, no errors
> > in journal, no errors while plugging/unplugging earphones.  I think it's
> > definitely more stable with the profile in pavucontrol set to Output
> > only (no + Input), but I can still trigger it by switching it, and it
> > never corrects itself until I switch a few more times.
> 
> Ok, so there are 2 issues here as I see it:
> 
> 1) It does not always reproduce
> 2) It does still reproduce sometimes with the patch, so the patch does not
> fix it.
> 
> So I think we just have to live with this for now.
> 
> Regards,
> 
> Hans
>
Yeah, I've never known it act any different so I'm used to it.  I do
know a few people in the past who have just bought a usb sound device
because they want to use a mic as well, and that just didn't work
quite right for them, even if sound output worked they had issues as
soon as they tried using mic.  I forget which, 4.1 or 4.4, 1 guy
mentioned still using it just because output/input worked flawlessly.
¯\_(ツ)_/¯

-Dean

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