linux-kernel - Re: [PATCH v8 00/19] Consolidate and improve NVIDIA Tegra CPUIDLE driver(s)

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Message-ID: <20191209160420.GA24097@qmqm.qmqm.pl>
Date:   Mon, 9 Dec 2019 17:04:20 +0100
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 00/19] Consolidate and improve NVIDIA Tegra CPUIDLE
 driver(s)

On Sun, Dec 08, 2019 at 01:56:14AM +0300, Dmitry Osipenko wrote:
> 08.12.2019 00:52, Michał Mirosław пишет:
> > On Tue, Dec 03, 2019 at 03:40:57AM +0300, Dmitry Osipenko wrote:
> >> Hello,
> >>
> >> This series does the following:
> >>
> >>   1. Unifies Tegra20/30/114 drivers into a single driver and moves it out
> >>      into common drivers/cpuidle/ directory.
> >>
> >>   2. Enables CPU cluster power-down idling state on Tegra30.
> >>
> >> In the end there is a quite nice clean up of the Tegra CPUIDLE drivers
> >> and of the Tegra's arch code in general. Please review, thanks!
> > 
> > I did a quick smoke test for this series on top of Linus' master:
> >  - rebuilding with the patches applied, CONFIG_ARM_TEGRA_CPUIDLE=n - works
> >  - building with CONFIG_ARM_TEGRA_CPUIDLE=y - doesn't boot
> > 
> > The hang is somewhere early in the boot process, before simplefb can
> > take the console and show any logs. If I get BOOTFB to work again I might
> > be able to get some more info.
> 
> Thank you very much for trying these patches!
> 
> Could you please try to make ARM_TEGRA_CPUIDLE "tristate" in the Kconfig
> and compile it as a loadable module? That way you'll get framebuffer
> shown before the hang happens.
> 
> Does LP2 suspend/resume work for you? There should be
> "nvidia,suspend-mode = <2>" in the PMC's node of device-tree.

Not at the moment. I also tried suspend-mode = <1> and <0>, but it
made no difference.

Best Regards,
Michał Mirosław