From: Viresh Kumar <viresh.kumar-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
vireshk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
nm-l0cyMroinI0@public.gmane.org,
sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
rnayak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
sboyd-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH 2/2] arm64: dts: sdm845: Support GPU/GMU
Date: Wed, 7 Mar 2018 10:36:24 +0530 [thread overview]
Message-ID: <20180307050624.GR23018@vireshk-i7> (raw)
In-Reply-To: <20180306153757.GD15200-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
On 06-03-18, 08:37, Jordan Crouse wrote:
> I'll try to explain but I might need Stephen or some of the other folks to jump
> in and save me.
Maybe you should start using his kernel.org address then ? :)
> On sdm845 there are shared power resources controlled by the RPMh which is
> programed by a series of commands from the regulator driver; but in the case
> of the GPU the votes are passed to the GMU (graphics management unit) which
> communicates with the RPMh on behalf of the GPU.
>
> In order to construct the RPMh vote we need first need a voltage level that we
> can look up in a database. qcom,arc-level is the voltage level associated with
> a specific OPP.
>
> I had previously been abusing this with opp-microvolt but that was wrong for
> obvious reasons and then Stephen pointed out that this would be a better way.
Glad that you shared that :)
A solution is already in progress for that and is partially merged as
well.
Look for "performance_state" in genpd and OPP cores (already merged),
followed by this series here:
https://lkml.kernel.org/r/cover.1513926033.git.viresh.kumar@linaro.org
--
viresh
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next prev parent reply other threads:[~2018-03-07 5:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 21:56 [PATCH 0/2] arm64: dts: Add sdm845 GPU/GMU and SMMU Jordan Crouse
[not found] ` <20180302215638.6145-1-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-02 21:56 ` [PATCH 1/2] dt-bindings: Document qcom,adreno-gmu Jordan Crouse
[not found] ` <20180302215638.6145-2-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-05 19:38 ` Rob Herring
2018-03-16 18:27 ` Jordan Crouse
2018-03-02 21:56 ` [PATCH 2/2] arm64: dts: sdm845: Support GPU/GMU Jordan Crouse
[not found] ` <20180302215638.6145-3-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-05 4:42 ` Viresh Kumar
2018-03-05 15:28 ` Jordan Crouse
[not found] ` <20180305152818.GC15200-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-03-06 4:26 ` Viresh Kumar
2018-03-06 15:37 ` [Freedreno] " Jordan Crouse
[not found] ` <20180306153757.GD15200-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-03-07 5:06 ` Viresh Kumar [this message]
2018-03-08 20:14 ` Jordan Crouse
[not found] ` <20180308201438.GA10589-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-03-09 3:43 ` Viresh Kumar
2018-03-09 10:19 ` [Freedreno] " Rajendra Nayak
[not found] ` <4fd61bd2-757b-ef30-a07f-ed74af031ff5-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-09 15:47 ` Jordan Crouse
2018-03-09 16:03 ` Jordan Crouse
2018-03-09 17:18 ` [Freedreno] " Stephen Boyd
[not found] ` <152061592175.13890.6455929815877326231-n1Xw8LXHxjTHt/MElyovVYaSKrA+ACpX0E9HWUfgJXw@public.gmane.org>
2018-03-09 17:42 ` Jordan Crouse
[not found] ` <20180309174246.GD10589-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-03-12 5:54 ` Viresh Kumar
[not found] ` <20180309160355.GC10589-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-03-12 5:52 ` Viresh Kumar
2018-03-13 18:23 ` [Freedreno] " Stephen Boyd
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