linux-kernel - Re: [PATCH v1 2/3] firmware: trusted_foundations: Different way of L2 cache enabling after LP2 suspend

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Message-ID: <20200506163447.GC2723057@ulmo>
Date:   Wed, 6 May 2020 18:34:47 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Jasper Korten <jja2000@...il.com>,
        David Heidelberg <david@...t.cz>,
        Peter Geis <pgwipeout@...il.com>, linux-pm@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] firmware: trusted_foundations: Different way of
 L2 cache enabling after LP2 suspend

On Wed, Mar 25, 2020 at 01:43:34AM +0300, Dmitry Osipenko wrote:
> ASUS TF300T device may not work properly if firmware is asked to fully
> re-initialize L2 cache after resume from LP2 suspend. The downstream
> kernel of TF300T uses different opcode to enable cache after resuming
> from LP2, this opcode also works fine on Nexus 7 and Ouya devices.
> Supposedly, this may be needed by an older firmware versions.
> 
> Reported-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> Tested-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> Tested-by: Jasper Korten <jja2000@...il.com>
> Tested-by: David Heidelberg <david@...t.cz>
> Tested-by: Peter Geis <pgwipeout@...il.com>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  arch/arm/mach-tegra/pm.c                     |  4 ++++
>  drivers/firmware/trusted_foundations.c       | 21 ++++++++++++++++++--
>  include/linux/firmware/trusted_foundations.h |  1 +
>  3 files changed, 24 insertions(+), 2 deletions(-)

I split this up and applied it to for-5.8/firmware and for-5.8/arm/core,
respectively.

Thanks,
Thierry

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