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

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Message-ID: <4399344e-712b-c54f-492d-2cbdaad509d6@linux.intel.com>
Date:   Tue, 30 Oct 2018 10:25:00 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Hans de Goede <hdegoede@...hat.com>
Cc:     duffydack73@...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>,
        mogens-jensen@...tonmail.com
Subject: Re: Regression found (Stop-marking-clocks-as-CLK_IS_CRITICAL)


On 10/30/18 10:03 AM, Andy Shevchenko wrote:
> On Tue, Oct 30, 2018 at 4:48 PM Hans de Goede <hdegoede@...hat.com> wrote:
>> On 30-10-18 15:38, Dean Wallace wrote:
>>> Excellent work Hans.  Compiled 4.19 with
>>> 0001-ASoC-intel-cht_bsw_max98090_ti-Use-pmc_plt_clk_0-ins.patch, sound
>>> works as before.
>>>
>>> for i in /sys/kernel/debug/clk/pmc_plt_clk_?; do echo -n "$i: "; cat $i/clk_flags; echo; done
>>> /sys/kernel/debug/clk/pmc_plt_clk_0:
>>> /sys/kernel/debug/clk/pmc_plt_clk_1:
>>> /sys/kernel/debug/clk/pmc_plt_clk_2:
>>> /sys/kernel/debug/clk/pmc_plt_clk_3:
>>> /sys/kernel/debug/clk/pmc_plt_clk_4:
>>> /sys/kernel/debug/clk/pmc_plt_clk_5:
>> Ok, so as I expected the Swanky is using pmc_plt_clk_0
>> as mclk instead of pmc_plt_clk_3. Now the question
>> becomes is this true for all the designs using the
>> max98090 codec?
>> 1) Unconditionally use pmc_plt_clk_0 as mclk (as my test patch does)
>> in the cht_bsw_max98090_ti.c machine driver
> I don't know the details, but the main question here indeed do we ever
> had a working example of that machine with CLK #3 in use?
yes, Rambi/Orco (Baytrail based).
>
> P.S. I would go your first proposal until the opposite will be proved.
>