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

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Message-ID: <f0a38df8-9197-452d-a46f-2bc2697c1186@sirena.org.uk>
Date: Mon, 27 May 2024 13:24:37 +0100
From: Mark Brown <broonie@...nel.org>
To: Francesco Dolcini <francesco@...cini.it>
Cc: 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, shengjiu.wang@...il.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 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?

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