linux-kernel - Re: [PATCH v2 3/4] media: staging: tegra-vde: Turn ON power domain on shutdown

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Message-ID: <20200626074333.GB3109062@ulmo>
Date:   Fri, 26 Jun 2020 09:43:33 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
        linux-tegra@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] media: staging: tegra-vde: Turn ON power domain
 on shutdown

On Wed, Jun 24, 2020 at 06:08:46PM +0300, Dmitry Osipenko wrote:
> On some devices bootloader isn't ready to a clamped VDE power, and thus,
> machine hangs on a warm reboot (CPU reset). The VDE power partition is
> turned ON by default on a cold boot, hence VDE driver should keep power
> partition enabled on system's reboot too. This fixes hang on a warm reboot
> on a Tegra20 Acer A500 device, which is handy if Embedded Controller
> driver is unavailable, i.e. cold reboot can't be performed.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/staging/media/tegra-vde/vde.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)

Unfortunate that we have to do this, but looks fine:

Acked-by: Thierry Reding <treding@...dia.com>

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