linux-kernel - Re: Regression found (Stop-marking-clocks-as-CLK_IS

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Message-ID: <pozwYTgSVvWumpTgwwf_C-qvYFNnl7yl9gcq9M-LOUXQTvkSX5f8E_2d-HYNYV_ruL8kAURaIR3ItM_UmFJeV-e28eYy8b2MomlwHMbb-5U=@protonmail.com>
Date:   Thu, 17 Jan 2019 19:30:41 +0000
From:   Mogens Jensen <mogens-jensen@...tonmail.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Dean Wallace <duffydack73@...il.com>,
        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>,
        Carlo Caione <carlo@...lessm.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Regression found (Stop-marking-clocks-as-CLK_IS_CRITICAL)

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, January 17, 2019 12:05 PM, Hans de Goede <hdegoede@...hat.com> wrote:

> Hi,
>
> On 17-01-19 10:12, Dean Wallace wrote:
>
> > Hi Hans, Mogens,
> > On 17-01-19, Mogens Jensen wrote:
> >
> > > Kernel is compiled with SND_SOC_INTEL_CHT_BSW_MAX98090_TI_MACH and the quirk seems to have fixed the problem caused by commit 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL"), as sound is now working if running "speaker-test" on my system which is clean ALSA.
>
> Note being "clean ALSA" is really not a good thing now a days,
> for lots of things we depend on pulseaudio (like setting
> up UCM mixer profiles).
>
I'm using UCM mixer profile from:

https://github.com/plbossart/UCM/tree/master/chtmax98090

This is enabled with:

alsaucm -c chtmax98090 set _verb HiFi set _enadev Speakers

> > > Unfortunately, SND_SOC_INTEL_CHT_BSW_MAX98090_TI_MACH driver is unusable on Clapper Chromebooks as audio played from everything but "speaker-test" as video players or web browsers is extremly low and sounds like played at 10x speed. At the same time kernel log is spammed with messages like this:
> > > max98090 i2c-193C9890:00: PLL unlocked
> > > intel_sst_acpi 80860F28:00: FW Version 01.0c.00.01
> > > writing to lpe: 00000000: 01 01 01 01 00 00 08 00 ff ff ff ff 55 00 00 00 ............U...
> > > writing to lpe: 00000000: 01 01 01 01 00 00 1a 00 ff ff ff ff 75 00 12 00 ............u...
> > > This is probably not related to the problem discussed in this thread, but the result is that I have to use the legacy driver SND_SOC_INTEL_BYT_MAX98090_MACH and therefore still has to revert commit 648e921888ad for sound to work.
> > > Is it possible to create a fix for SND_SOC_INTEL_BYT_MAX98090_MACH on kernel 4.19? Kernel 4.19 is a long term release so it would be very nice to have fix for this version upstream.
> >
> > I have been reverting "clk: x86: Stop marking clocks as CLK_IS_CRITICAL"
> > and the patch that initially added the quirk for swanky because of sound
> > instability issues as you described. I'm compiling vanilla Archlinux
> > kernel with SND_SOC_INTEL_CHT_BSW_MAX98090_TI_MACH, using pulseaudio,
> > and have sound in all my apps.
> > Baytrail sound has always been a little touchy, especially using headset
> > with mic, but since the clk patch breaking sound and the quirk patch to
> > fix it, there is a lot more instability. Just running pavucontrol, or
> > plugging in headset sets it off. It's a head scratcher.
>
> Mogens, Dean, can you please try the SND_SOC_INTEL_CHT_BSW_MAX98090_TI_MACH
> driver, without reverting any patches, with the attached patch on top and
> see if that helps?
>
> Thanks & Regards,
>
> Hans

I have applied the patch to kernel 4.19.15 and unfortunately this has not solved the problems.

Audio generated from "speaker-test" is normal, but from everything else is very low and played at 10x speed. However, I'm not seeing the "max98090 i2c-193C9890:00: PLL unlocked" message in kernel log anymore, but it's still spammed with "writing to lpe: ...".

Regards,

Mogens