linux-kernel - Re: [PATCH v16 08/40] gpu: host1x: Add initial runtime PM and OPP support

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Message-ID: <21212ddb-205f-71d6-0199-d75768eaf32c@nvidia.com>
Date:   Tue, 21 Dec 2021 18:55:49 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Nishanth Menon <nm@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-clk@...r.kernel.org, David Heidelberg <david@...t.cz>
Subject: Re: [PATCH v16 08/40] gpu: host1x: Add initial runtime PM and OPP
 support

Hi Dmitry, Thierry,

On 30/11/2021 23:23, Dmitry Osipenko wrote:
> Add runtime PM and OPP support to the Host1x driver. For the starter we
> will keep host1x always-on because dynamic power management require a major
> refactoring of the driver code since lot's of code paths are missing the
> RPM handling and we're going to remove some of these paths in the future.


Unfortunately, this change is breaking boot on Tegra186. Bisect points 
to this and reverting on top of -next gets the board booting again. 
Sadly, there is no panic or error reported, it is just a hard hang. I 
will not have time to look at this this week and so we may need to 
revert for the moment.

Jon

-- 
nvpublic