linux-kernel - Re: [PATCH v3] pmdomain: imx: gpcv2: Add delay after power up handshake

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Date: Tue, 21 May 2024 11:54:02 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Shengjiu Wang <shengjiu.wang@....com>, regressions@...ts.linux.dev,
	Stephen Boyd <sboyd@...nel.org>, ulf.hansson@...aro.org
Cc: ulf.hansson@...aro.org, heiko@...ech.de, u.kleine-koenig@...gutronix.de,
	geert+renesas@...der.be, rafael@...nel.org,
	linux-pm@...r.kernel.org, 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,
	imx@...ts.linux.dev, shengjiu.wang@...il.com, frank.li@....com,
	mkl@...gutronix.de, linus.walleij@...aro.org,
	linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] pmdomain: imx: gpcv2: Add delay after power up
 handshake

Hello Stephen and Ulf, 

On Sat, May 11, 2024 at 10:55:25AM +0800, Shengjiu Wang wrote:
> AudioMix BLK-CTRL on i.MX8MP encountered an accessing register issue
> after power up.
> 
> [    2.181035] Kernel panic - not syncing: Asynchronous SError Interrupt
..

> Fixes: 1496dd413b2e ("clk: imx: imx8mp: Add pm_runtime support for power saving")
> Reported-by: Francesco Dolcini <francesco@...cini.it>

Any chances to get this into mainline with some priority?

If in your opinion the fix is not correct I can just send a revert of
the buggy commit.

I reported the bug 4 weeks ago, the same day the broken commit was
merged into -next [1], now we have a regression in mainline that is
preventing booting with a kernel panic and because of that our whole CI
is not able to test anything and therefore preventing us to look into
any other regression.

Thanks,
Francesco

[1] https://lore.kernel.org/all/20240424164725.GA18760@francesco-nb/