linux-kernel - Re: [PATCH v4] clk: imx: imx8mp: Add pm

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Date: Mon, 27 May 2024 20:36:48 +0800
From: Shengjiu Wang <shengjiu.wang@...il.com>
To: Mark Brown <broonie@...nel.org>
Cc: Francesco Dolcini <francesco@...cini.it>, Shengjiu Wang <shengjiu.wang@....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
Subject: Re: [PATCH v4] clk: imx: imx8mp: Add pm_runtime support for power saving

On Mon, May 27, 2024 at 8:24 PM Mark Brown <broonie@...nel.org> wrote:
>
> On Wed, Apr 24, 2024 at 06:47:25PM +0200, Francesco Dolcini wrote:
> > On Thu, Mar 21, 2024 at 09:14:02PM +0800, Shengjiu Wang wrote:
> > > Add pm_runtime support for power saving. In pm runtime suspend
> > > state the registers will be reseted, so add registers save
> > > in pm runtime suspend and restore them in pm runtime resume.
> > >
> > > Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> > > Reviewed-by: Peng Fan <peng.fan@....com>
> >
> > Is this introducing a regression?
> >
> >   800 13:50:19.713052  <6>[   16.531134] clk: Disabling unused clocks
> >   801 13:50:19.727524  <2>[   16.535413] SError Interrupt on CPU2, code 0x00000000bf000002 -- SError
> >   802 13:50:19.731400  <4>[   16.535421] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc5-next-20240424 #1
> >   803 13:50:19.742514  <4>[   16.535428] Hardware name: Toradex Verdin iMX8M Plus on Dahlia Board (DT)
>
> I am now seeing this failure in mainline on both the above board and
> i.MX8MP-EVK.  There was a fix mentioned in the thread but it's not
> landed for -rc1, both boards crash as above.  What's the plan for
> getting this fixed, should the patch be reverted for now?

https://lore.kernel.org/all/CAPDyKFp4V8f0iyeRASSEu4YaCSz0m56=8ssBJ9ogSvqG1dzMZA@mail.gmail.com/

fixed is merged,  but may not in v6.10-rc1. Should anybody help to cherry-pick?

Best regards
Shengjiu Wang