From: Dmitry Osipenko <digetx@gmail.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Viresh Kumar" <vireshk@kernel.org>,
"Stephen Boyd" <sboyd@kernel.org>,
"Peter De Schrijver" <pdeschrijver@nvidia.com>,
"Mikko Perttunen" <mperttunen@nvidia.com>,
"Peter Chen" <peter.chen@kernel.org>,
"Lee Jones" <lee.jones@linaro.org>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Nishanth Menon" <nm@ti.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Michael Turquette" <mturquette@baylibre.com>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
linux-tegra <linux-tegra@vger.kernel.org>,
"Linux PM" <linux-pm@vger.kernel.org>,
"Linux USB List" <linux-usb@vger.kernel.org>,
linux-staging@lists.linux.dev, linux-pwm@vger.kernel.org,
linux-mmc <linux-mmc@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
DTML <devicetree@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
"Mark Brown" <broonie@kernel.org>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Richard Weinberger" <richard@nod.at>,
"Miquel Raynal" <miquel.raynal@bootlin.com>,
"Lucas Stach" <dev@lynxeye.de>, "Stefan Agner" <stefan@agner.ch>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"David Heidelberg" <david@ixit.cz>
Subject: Re: [PATCH v13 06/35] clk: tegra: Support runtime PM and power domain
Date: Thu, 7 Oct 2021 00:25:05 +0300 [thread overview]
Message-ID: <35714b9d-d855-1ad3-241b-f97859f8c97b@gmail.com> (raw)
In-Reply-To: <CAPDyKFq_-HGPRNiNDmnEbuah0mUYoRUWVs1SvbQ6VNMMwEcXjA@mail.gmail.com>
06.10.2021 15:38, Ulf Hansson пишет:
>> I'm also wondering if we could add some 'was_enabled' flag to GENPDs,
>> setting it by genpd_suspend_noirq() for the enabled domains, and then
>> powering-on GENPDs from genpd_resume_noirq() only if they were in the
>> enabled state during genpd_suspend_noirq() time. It actually puzzled me
>> for a quite long time why GENPD core enables domains unconditionally
>> during early resume. This should solve a part of the problem and it
>> makes suspend/resume a bit safer because there is a smaller chance to
>> crash hardware during suspend, at least it's easier to debug.
> Just because the PM domain was already off at genpd_suspend_noirq(),
> doesn't mean that it can stay powered off at genpd_resume_noirq(). At
> least as is today.
>
> The main reason why genpd_resume_noirq() powers on the PM domain, is
> because it's not possible for the consumer drivers to rely on runtime
> PM to do it (because runtime PM has been disabled by the PM core).
At least Tegra doesn't need to have domains force-resumed. This should
be a platform-specific behaviour. We may add a new flag for that, I
suppose. I'll try to keep this in mind for a future improvement. Thank
you for the clarification.
next prev parent reply other threads:[~2021-10-06 21:25 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 22:40 [PATCH v13 00/35] NVIDIA Tegra power management patches for 5.16 Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 01/35] opp: Change type of dev_pm_opp_attach_genpd(names) argument Dmitry Osipenko
2021-10-04 9:11 ` Viresh Kumar
2021-09-26 22:40 ` [PATCH v13 02/35] soc/tegra: Add devm_tegra_core_dev_init_opp_table_common() Dmitry Osipenko
2021-10-01 12:50 ` Ulf Hansson
2021-10-01 19:15 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 03/35] soc/tegra: pmc: Disable PMC state syncing Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 04/35] soc/tegra: Don't print error message when OPPs not available Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 05/35] dt-bindings: clock: tegra-car: Document new clock sub-nodes Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 06/35] clk: tegra: Support runtime PM and power domain Dmitry Osipenko
2021-10-01 12:32 ` Ulf Hansson
2021-10-01 19:50 ` Dmitry Osipenko
2021-10-02 20:44 ` Dmitry Osipenko
2021-10-05 13:10 ` Ulf Hansson
2021-10-05 22:19 ` Dmitry Osipenko
2021-10-05 22:43 ` Dmitry Osipenko
2021-10-06 2:40 ` Dmitry Osipenko
2021-10-06 12:43 ` Ulf Hansson
2021-10-06 21:14 ` Dmitry Osipenko
2021-10-06 22:01 ` Dmitry Osipenko
2021-10-06 23:21 ` Dmitry Osipenko
2021-10-07 9:18 ` Ulf Hansson
2021-10-07 10:36 ` Dmitry Osipenko
2021-10-06 12:38 ` Ulf Hansson
2021-10-06 21:20 ` Dmitry Osipenko
2021-10-06 21:25 ` Dmitry Osipenko [this message]
2021-10-06 22:03 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 07/35] dt-bindings: host1x: Document OPP and power domain properties Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 08/35] dt-bindings: host1x: Document Memory Client resets of Host1x, GR2D and GR3D Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 09/35] gpu: host1x: Add runtime PM and OPP support Dmitry Osipenko
2021-10-01 13:24 ` Ulf Hansson
2021-09-26 22:40 ` [PATCH v13 10/35] gpu: host1x: Add host1x_channel_stop() Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 11/35] drm/tegra: dc: Support OPP and SoC core voltage scaling Dmitry Osipenko
2021-10-01 13:27 ` Ulf Hansson
2021-10-16 15:36 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 12/35] drm/tegra: hdmi: Add OPP support Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 13/35] drm/tegra: gr2d: Support generic power domain and runtime PM Dmitry Osipenko
2021-10-01 13:39 ` Ulf Hansson
2021-10-01 14:29 ` Dmitry Osipenko
2021-10-01 14:55 ` Ulf Hansson
2021-10-01 19:00 ` Dmitry Osipenko
2021-10-04 11:01 ` Ulf Hansson
2021-10-04 15:57 ` Dmitry Osipenko
2021-10-05 8:45 ` Ulf Hansson
2021-10-05 17:16 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 14/35] drm/tegra: gr3d: " Dmitry Osipenko
2021-10-01 14:06 ` Ulf Hansson
2021-10-01 21:25 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 15/35] drm/tegra: vic: Support system suspend Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 16/35] usb: chipidea: tegra: Add runtime PM and OPP support Dmitry Osipenko
2021-09-30 0:40 ` Dmitry Osipenko
2021-09-30 14:06 ` Peter Chen
2021-09-30 14:08 ` Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 17/35] bus: tegra-gmi: " Dmitry Osipenko
2021-10-01 14:18 ` Ulf Hansson
2021-09-26 22:40 ` [PATCH v13 18/35] pwm: tegra: " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 19/35] mmc: sdhci-tegra: " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 20/35] mtd: rawnand: tegra: " Dmitry Osipenko
2021-10-01 14:24 ` Ulf Hansson
2021-10-01 14:35 ` Dmitry Osipenko
2021-10-01 15:01 ` Ulf Hansson
2021-10-17 8:38 ` Dmitry Osipenko
2021-10-19 11:40 ` Ulf Hansson
2021-09-26 22:40 ` [PATCH v13 21/35] spi: tegra20-slink: Add " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 22/35] media: dt: bindings: tegra-vde: Convert to schema Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 23/35] media: dt: bindings: tegra-vde: Document OPP and power domain Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 24/35] media: staging: tegra-vde: Support generic " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 25/35] soc/tegra: fuse: Reset hardware Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 26/35] soc/tegra: fuse: Use resource-managed helpers Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 27/35] soc/tegra: regulators: Prepare for suspend Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 28/35] soc/tegra: pmc: Rename 3d power domains Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 29/35] soc/tegra: pmc: Rename core power domain Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 30/35] soc/tegra: pmc: Enable core domain support for Tegra20 and Tegra30 Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 31/35] ARM: tegra: Add OPP tables and power domains to Tegra20 device-trees Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 32/35] ARM: tegra: Add OPP tables and power domains to Tegra30 device-trees Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 33/35] ARM: tegra: Add Memory Client resets to Tegra20 GR2D, GR3D and Host1x Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 34/35] ARM: tegra: Add Memory Client resets to Tegra30 " Dmitry Osipenko
2021-09-26 22:40 ` [PATCH v13 35/35] ARM: tegra20/30: Disable unused host1x hardware Dmitry Osipenko
2021-10-01 14:36 ` [PATCH v13 00/35] NVIDIA Tegra power management patches for 5.16 Ulf Hansson
2021-10-01 14:40 ` Dmitry Osipenko
2021-10-01 15:02 ` Ulf Hansson
2021-10-04 9:11 ` Viresh Kumar
2021-10-04 14:52 ` Dmitry Osipenko
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