linux-kernel - iMX8M Mini suspend/resume hanging on imx8m_blk_ctrl_power

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Date: Thu, 04 Apr 2024 16:53:58 +0100
From: vitor <ivitro@...il.com>
To: linux-pm@...r.kernel.org, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: ivitro@...il.com, vitor.soares@...adex.com, ulf.hansson@...aro.org, 
 shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de, 
 festevam@...il.com, rafael@...nel.org, geert+renesas@...der.be,
 peng.fan@....com,  linus.walleij@...aro.org,
 u.kleine-koenig@...gutronix.de, marex@...x.de
Subject: iMX8M Mini suspend/resume hanging on imx8m_blk_ctrl_power_on()

Greetings,

I'm trying to suspend/resume our Verdin iMX8M Mini with VPU IP using
the latest 6.9.0-rc2 Kernel. While the system can suspend without
issues, it hangs on the resume routine. After some investigation, I can
see the Kernel hanging on imx8m_blk_ctrl_power_on()[1] while resuming
the hantro-vpu power domain.

Any hint about that?

[1]https://elixir.bootlin.com/linux/v6.9-rc2/source/drivers/pmdomain/imx/imx8m-blk-ctrl.c#L101