linux-kernel - Re: clk_imx8mp_audiomix_runtime_resume Kernel panic regression on v6.12

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Message-ID: <CAA+D8AO3a5WsZ4=V-9CDifDZYjJjwQmQQDDQM7ZKgZ6_-CNDPA@mail.gmail.com>
Date: Fri, 15 Nov 2024 11:13:58 +0800
From: Shengjiu Wang <shengjiu.wang@...il.com>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Shengjiu Wang <shengjiu.wang@....com>, Frank Li <frank.li@....com>, abelvesa@...nel.org, 
	peng.fan@....com, mturquette@...libre.com, sboyd@...nel.org, 
	shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de, 
	festevam@...il.com, linux-imx@....com, linux-clk@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	regressions@...ts.linux.dev, Adam Ford <aford173@...il.com>, 
	Alexander Stein <alexander.stein@...tq-group.com>, Mark Brown <broonie@...nel.org>, 
	ulf.hansson@...aro.org
Subject: Re: clk_imx8mp_audiomix_runtime_resume Kernel panic regression on v6.12

On Tue, Nov 12, 2024 at 5:20 PM Francesco Dolcini <francesco@...cini.it> wrote:
>
> On Tue, Nov 12, 2024 at 08:59:58AM +0100, Francesco Dolcini wrote:
> > On Mon, Oct 07, 2024 at 03:25:55PM +0200, Francesco Dolcini wrote:
> > > it seems that an old regression is back on v6.12, reproduced on -rc2
> > > (not sure about rc1).
> > >
> > > The original report is from https://lore.kernel.org/all/20240424164725.GA18760@francesco-nb/
> > > and it was fixed with https://lore.kernel.org/all/1715396125-3724-1-git-send-email-shengjiu.wang@nxp.com/.
> > >
> > > Is it now back?
> >
> > I was able to reproduce this issue once more, this time with 6.11.7.
> > As I wrote in another email the issue is not systematic as it used to
> > be.
> >
> > Any idea?
>
> Frank, Shengjiu, could it be that the udelay(5) in imx_pgc_power_up() is
> too short and therefore we have such non-systematic failures?
>

Francesco,  it seems hard to reproduce it on my i.MX8MP-EVK board.

If it is easy to reproduce on your side, you can try to enlarge the delay
time to see if there is any improvement.

Thanks.

Best regards
Shengjiu Wang