linux-kernel - Re: [PATCH RFC] soc: amlogic: meson-ee-pwrc: Drop the .shutdown callback from the driver

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Date:   Mon, 03 May 2021 16:57:12 -0700
From:   Kevin Hilman <khilman@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        narmstrong@...libre.com, linux-amlogic@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Stefan Agner <stefan@...er.ch>
Subject: Re: [PATCH RFC] soc: amlogic: meson-ee-pwrc: Drop the .shutdown
 callback from the driver

Martin Blumenstingl <martin.blumenstingl@...glemail.com> writes:

> Stefan reports that rebooting his ODROID-N2+ (using a G12B SoC) results
> in the board hanging. His kernel config uses:
>   CONFIG_MESON_EE_PM_DOMAINS=y
>   CONFIG_DRM_MESON=m
>
> He reports that his kernel config results in the DRM driver's .shutdown
> callback to be executed after the power domain driver's .shutdown
> callback. That's problematic because meson_ee_pwrc_shutdown disables the
> clock which are used by the VPU IP. This causes the board to hang.

I didn't dig deeply on this yet because this smells very much like an
issue Art reported[1] and fixed.

What kernel version are you using, and does it contain
commit fa0c16caf3d7 (drm: meson_drv add shutdown function)

Kevin

[1] https://lore.kernel.org/dri-devel/20210302042202.3728113-1-art@khadas.com/