linux-kernel - Re: [RFC PATCH 2/2] iommu: rockchip: Handle system-wide and runtime PM

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Date:	Mon, 15 Dec 2014 10:06:51 -0800
From:	Kevin Hilman <khilman@...nel.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Tomasz Figa <tfiga@...omium.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	"open list\:ARM\/Rockchip SoC..." 
	<linux-rockchip@...ts.infradead.org>,
	"linux-pm\@vger.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-arm-kernel\@lists.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	iommu@...ts.linux-foundation.org, Len Brown <len.brown@...el.com>,
	Pavel Machek <pavel@....cz>, Heiko Stuebner <heiko@...ech.de>,
	Joerg Roedel <joro@...tes.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [RFC PATCH 2/2] iommu: rockchip: Handle system-wide and runtime PM

Geert Uytterhoeven <geert@...ux-m68k.org> writes:

> On Fri, Dec 12, 2014 at 9:04 PM, Kevin Hilman <khilman@...nel.org> wrote:
>> An even more exciting problem exists when a CPU is in the same domain as
>> other peripherals, those peripherals are all idle and the power domain
>> is gated. :)
>
> We do have pm_genpd_attach_cpuidle() and pm_genpd_name_attach_cpuidle()?

Exactly.  

And I think to solve this problem, we need to generalize the attaching
of dependent devices to a PM domain.

Kevin
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