From: Dmitry Osipenko <digetx@gmail.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "Ulf Hansson" <ulf.hansson@linaro.org>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Alan Stern" <stern@rowland.harvard.edu>,
"Peter Chen" <Peter.Chen@nxp.com>,
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"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Rob Herring" <robh+dt@kernel.org>,
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Subject: Re: [PATCH v1 00/30] Introduce core voltage scaling for NVIDIA Tegra20/30 SoCs
Date: Mon, 9 Nov 2020 08:10:16 +0300 [thread overview]
Message-ID: <aba1fcac-74b8-f370-ab45-312975da66e6@gmail.com> (raw)
In-Reply-To: <713b319e-bb7b-4743-59f0-b9892c3da92d@gmail.com>
09.11.2020 07:47, Dmitry Osipenko пишет:
> 09.11.2020 07:43, Viresh Kumar пишет:
>> On 08-11-20, 15:19, Dmitry Osipenko wrote:
>>> I took a detailed look at the GENPD and tried to implement it. Here is
>>> what was found:
>>>
>>> 1. GENPD framework doesn't aggregate performance requests from the
>>> attached devices. This means that if deviceA requests performance state
>>> 10 and then deviceB requests state 3, then framework will set domain's
>>> state to 3 instead of 10.
>>
>> It does. Look at _genpd_reeval_performance_state().
>>
>
> Thanks, I probably had a bug in the quick prototype and then overlooked
> that function.
>
If a non-hardware device-tree node is okay to have for the domain, then
I can try again.
What I also haven't mentioned is that GENPD adds some extra complexity
to some drivers (3d, video decoder) because we will need to handle both
new GENPD and legacy Tegra specific pre-genpd era domains.
I'm also not exactly sure how the topology of domains should look like
because Tegra has a power-controller (PMC) which manages power rail of a
few hardware units. Perhaps it should be
device -> PMC domain -> CORE domain
but not exactly sure for now.
next prev parent reply other threads:[~2020-11-09 5:10 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-04 23:43 [PATCH v1 00/30] Introduce core voltage scaling for NVIDIA Tegra20/30 SoCs Dmitry Osipenko
2020-11-04 23:43 ` [PATCH v1 01/30] dt-bindings: host1x: Document OPP and voltage regulator properties Dmitry Osipenko
2020-11-09 18:57 ` Rob Herring
2020-11-11 11:45 ` Ulf Hansson
2020-11-04 23:43 ` [PATCH v1 02/30] dt-bindings: mmc: tegra: " Dmitry Osipenko
2020-11-09 18:58 ` Rob Herring
2020-11-04 23:44 ` [PATCH v1 03/30] dt-bindings: pwm: " Dmitry Osipenko
2020-11-09 19:00 ` Rob Herring
2020-11-04 23:44 ` [PATCH v1 04/30] media: dt: bindings: tegra-vde: " Dmitry Osipenko
2020-11-09 19:01 ` Rob Herring
2020-11-04 23:44 ` [PATCH v1 05/30] dt-binding: usb: ci-hdrc-usb2: " Dmitry Osipenko
2020-11-09 19:01 ` Rob Herring
2020-11-04 23:44 ` [PATCH v1 06/30] dt-bindings: usb: tegra-ehci: " Dmitry Osipenko
2020-11-09 19:01 ` Rob Herring
2020-11-04 23:44 ` [PATCH v1 07/30] soc/tegra: Add sync state API Dmitry Osipenko
2020-11-10 20:47 ` Thierry Reding
2020-11-10 21:22 ` Dmitry Osipenko
2020-11-10 21:32 ` Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 08/30] soc/tegra: regulators: Support Tegra SoC device " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 09/30] soc/tegra: regulators: Fix lockup when voltage-spread is out of range Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 10/30] regulator: Allow skipping disabled regulators in regulator_check_consumers() Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 11/30] drm/tegra: dc: Support OPP and SoC core voltage scaling Dmitry Osipenko
2020-11-10 20:29 ` Thierry Reding
2020-11-10 20:32 ` Mark Brown
2020-11-10 21:23 ` Dmitry Osipenko
2020-11-11 11:55 ` Mark Brown
2020-11-12 16:59 ` Dmitry Osipenko
2020-11-12 17:16 ` Mark Brown
2020-11-12 19:16 ` Dmitry Osipenko
2020-11-12 20:01 ` Mark Brown
2020-11-12 22:37 ` Dmitry Osipenko
2020-11-13 14:29 ` Mark Brown
2020-11-13 15:55 ` Dmitry Osipenko
2020-11-13 16:15 ` Mark Brown
2020-11-13 17:13 ` Dmitry Osipenko
2020-11-13 17:28 ` Mark Brown
2020-11-15 17:42 ` Dmitry Osipenko
2020-11-16 13:33 ` Mark Brown
2020-11-19 14:22 ` Dmitry Osipenko
2020-11-19 15:19 ` Mark Brown
2020-11-13 17:30 ` Thierry Reding
2020-11-10 21:17 ` Dmitry Osipenko
2020-11-10 21:50 ` Dmitry Osipenko
2020-11-11 9:28 ` Dan Carpenter
2020-11-04 23:44 ` [PATCH v1 12/30] drm/tegra: gr2d: Correct swapped device-tree compatibles Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 13/30] drm/tegra: gr2d: Support OPP and SoC core voltage scaling Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 14/30] drm/tegra: gr3d: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 15/30] drm/tegra: hdmi: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 16/30] gpu: host1x: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 17/30] mmc: sdhci-tegra: Support OPP and " Dmitry Osipenko
2020-11-05 9:58 ` Viresh Kumar
2020-11-05 14:18 ` Dmitry Osipenko
2020-11-06 6:15 ` Viresh Kumar
2020-11-06 13:17 ` Dmitry Osipenko
2020-11-06 13:41 ` Frank Lee
2020-11-09 5:00 ` Viresh Kumar
2020-11-09 5:08 ` Dmitry Osipenko
2020-11-09 5:10 ` Viresh Kumar
2020-11-09 5:19 ` Dmitry Osipenko
2020-11-09 5:35 ` Viresh Kumar
2020-11-09 5:44 ` Dmitry Osipenko
2020-11-09 5:53 ` Viresh Kumar
2020-11-09 11:20 ` Frank Lee
2020-12-22 8:54 ` Viresh Kumar
2020-11-04 23:44 ` [PATCH v1 18/30] pwm: tegra: " Dmitry Osipenko
2020-11-10 20:50 ` Thierry Reding
2020-11-10 21:17 ` Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 19/30] media: staging: tegra-vde: Support OPP and SoC " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 20/30] usb: chipidea: tegra: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 21/30] usb: host: ehci-tegra: " Dmitry Osipenko
2020-11-05 16:07 ` Alan Stern
2020-11-05 17:54 ` Dmitry Osipenko
2020-11-05 18:02 ` Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 22/30] memory: tegra20-emc: Support Tegra SoC device state syncing Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 23/30] memory: tegra30-emc: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 24/30] ARM: tegra: Add OPP tables for Tegra20 peripheral devices Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 25/30] ARM: tegra: Add OPP tables for Tegra30 " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 26/30] ARM: tegra: ventana: Add voltage supplies to DVFS-capable devices Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 27/30] ARM: tegra: paz00: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 28/30] ARM: tegra: acer-a500: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 29/30] ARM: tegra: cardhu-a04: " Dmitry Osipenko
2020-11-04 23:44 ` [PATCH v1 30/30] ARM: tegra: nexus7: " Dmitry Osipenko
2020-11-05 1:45 ` [PATCH v1 00/30] Introduce core voltage scaling for NVIDIA Tegra20/30 SoCs Michał Mirosław
2020-11-05 13:57 ` Dmitry Osipenko
2020-11-05 9:45 ` Ulf Hansson
2020-11-05 10:06 ` Viresh Kumar
2020-11-05 10:34 ` Ulf Hansson
2020-11-05 10:40 ` Viresh Kumar
2020-11-05 10:56 ` Ulf Hansson
2020-11-05 11:13 ` Viresh Kumar
2020-11-05 12:52 ` Ulf Hansson
2020-11-05 15:22 ` Dmitry Osipenko
2020-11-08 12:19 ` Dmitry Osipenko
2020-11-09 4:43 ` Viresh Kumar
2020-11-09 4:47 ` Dmitry Osipenko
2020-11-09 5:10 ` Dmitry Osipenko [this message]
2020-11-09 5:12 ` Viresh Kumar
2020-11-11 11:38 ` Ulf Hansson
2020-11-12 19:57 ` Dmitry Osipenko
2020-11-12 20:43 ` Thierry Reding
2020-11-12 22:14 ` Dmitry Osipenko
2020-11-13 14:45 ` Ulf Hansson
2020-11-13 16:00 ` Dmitry Osipenko
2020-11-13 16:35 ` Thierry Reding
2020-11-15 16:29 ` Dmitry Osipenko
[not found] ` <160683107675.35139.13466076210885462180.b4-ty@kernel.org>
2020-12-01 14:17 ` Dmitry Osipenko
2020-12-01 14:34 ` Mark Brown
2020-12-01 14:44 ` Dmitry Osipenko
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