From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alan Stern <stern@rowland.harvard.edu>,
Linux PM mailing list <linux-pm@lists.linux-foundation.org>,
linux-omap@vger.kernel.org, Jean Pihet <j-pihet@ti.com>,
markgross@thegnar.org
Subject: Re: [linux-pm] [PATCH 02/11] PM: extend PM QoS with per-device wake-up constraints
Date: Sun, 21 Aug 2011 20:05:53 +0200 [thread overview]
Message-ID: <201108212005.53898.rjw@sisk.pl> (raw)
In-Reply-To: <20110821082509.GA10380@opensource.wolfsonmicro.com>
On Sunday, August 21, 2011, Mark Brown wrote:
> On Sat, Aug 20, 2011 at 09:14:37PM +0200, Rafael J. Wysocki wrote:
>
> > I guess you mean the driver here and I'm not really sure it can.
> > For instance, the driver may not know what configuration it works in,
> > e.g. is there a power domain or a hierarchy of those and how much time
> > it takes to power them all down and up and what the power break even is.
>
> I don't understand why the driver would need to know what situation it's
> in. I'd been working on the basis that the idea was that the driver
> said what the constraints it has are and then some code with a more
> system wide view would make the actual decisions for things outside the
> driver domian.
That's correct, but in order to figure out a "sensible default"
the driver generally would need to know what the expectations with
respect to it are. Otherwise it can very well generate a random
number and use that.
Thanks,
Rafael
next prev parent reply other threads:[~2011-08-21 18:04 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 15:11 [PATCH v2 00/11] PM QoS: add a per-device wake-up latency constraint class jean.pihet
2011-06-30 15:11 ` [PATCH 01/11] PM: add a per-device wake-up latency constraints plist jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-07-02 19:39 ` Rafael J. Wysocki
2011-07-20 8:57 ` Jean Pihet
2011-07-20 8:57 ` Jean Pihet
2011-07-02 19:39 ` Rafael J. Wysocki
2011-06-30 15:11 ` [PATCH 02/11] PM: extend PM QoS with per-device wake-up constraints jean.pihet
2011-07-02 21:10 ` Rafael J. Wysocki
2011-07-02 21:10 ` Rafael J. Wysocki
2011-07-20 9:13 ` Jean Pihet
2011-07-20 9:13 ` Jean Pihet
2011-08-02 17:49 ` Kevin Hilman
2011-08-02 20:19 ` Rafael J. Wysocki
2011-08-02 20:19 ` Rafael J. Wysocki
2011-08-02 21:23 ` Kevin Hilman
2011-08-02 21:23 ` Kevin Hilman
2011-08-02 22:16 ` Rafael J. Wysocki
2011-08-04 13:24 ` Mark Brown
2011-08-04 13:24 ` [linux-pm] " Mark Brown
2011-08-04 19:15 ` Rafael J. Wysocki
2011-08-04 19:15 ` [linux-pm] " Rafael J. Wysocki
2011-08-05 15:29 ` mark gross
2011-08-05 15:29 ` [linux-pm] " mark gross
2011-08-05 16:11 ` Mark Brown
2011-08-05 19:37 ` Rafael J. Wysocki
2011-08-06 3:37 ` Mark Brown
2011-08-06 3:37 ` [linux-pm] " Mark Brown
2011-08-06 19:46 ` Rafael J. Wysocki
2011-08-07 2:47 ` [linux-pm] " Mark Brown
2011-08-08 21:31 ` Rafael J. Wysocki
2011-08-19 3:11 ` Mark Brown
2011-08-19 3:11 ` [linux-pm] " Mark Brown
2011-08-19 20:42 ` Rafael J. Wysocki
2011-08-19 20:42 ` [linux-pm] " Rafael J. Wysocki
2011-08-19 23:14 ` Mark Brown
2011-08-20 2:24 ` Alan Stern
2011-08-20 6:25 ` Mark Brown
2011-08-20 13:48 ` Alan Stern
2011-08-20 13:48 ` [linux-pm] " Alan Stern
2011-08-20 15:30 ` Mark Brown
2011-08-20 15:30 ` [linux-pm] " Mark Brown
2011-08-20 16:34 ` Rafael J. Wysocki
2011-08-20 16:34 ` [linux-pm] " Rafael J. Wysocki
2011-08-20 17:04 ` Mark Brown
2011-08-20 19:14 ` Rafael J. Wysocki
2011-08-20 19:14 ` [linux-pm] " Rafael J. Wysocki
2011-08-21 8:25 ` Mark Brown
2011-08-21 18:05 ` Rafael J. Wysocki
2011-08-21 18:05 ` Rafael J. Wysocki [this message]
2011-08-23 9:21 ` Mark Brown
2011-08-23 9:21 ` [linux-pm] " Mark Brown
2011-08-23 21:31 ` Rafael J. Wysocki
2011-08-25 10:38 ` Mark Brown
2011-08-25 14:17 ` Rafael J. Wysocki
2011-08-25 14:17 ` [linux-pm] " Rafael J. Wysocki
2011-08-25 14:41 ` Jean Pihet
2011-08-25 14:49 ` Rafael J. Wysocki
2011-08-25 14:49 ` Rafael J. Wysocki
2011-08-25 14:41 ` Jean Pihet
2011-08-26 16:40 ` [linux-pm] " mark gross
2011-08-26 16:40 ` mark gross
2011-08-25 10:38 ` Mark Brown
2011-08-23 21:31 ` Rafael J. Wysocki
2011-08-21 8:25 ` Mark Brown
2011-08-20 17:04 ` Mark Brown
2011-08-20 6:25 ` Mark Brown
2011-08-20 2:24 ` Alan Stern
2011-08-20 9:35 ` Rafael J. Wysocki
2011-08-20 9:35 ` [linux-pm] " Rafael J. Wysocki
2011-08-20 10:31 ` Mark Brown
2011-08-20 16:51 ` Rafael J. Wysocki
2011-08-20 17:22 ` Mark Brown
2011-08-20 17:22 ` [linux-pm] " Mark Brown
2011-08-20 19:18 ` Rafael J. Wysocki
2011-08-20 19:18 ` Rafael J. Wysocki
2011-08-20 16:51 ` Rafael J. Wysocki
2011-08-20 10:31 ` Mark Brown
2011-08-19 23:14 ` Mark Brown
2011-08-08 21:31 ` Rafael J. Wysocki
2011-08-07 2:47 ` Mark Brown
2011-08-05 19:37 ` Rafael J. Wysocki
2011-08-05 16:11 ` Mark Brown
2011-08-02 17:49 ` Kevin Hilman
2011-08-26 2:25 ` MyungJoo Ham
2011-08-26 2:25 ` [linux-pm] " MyungJoo Ham
2011-08-26 16:54 ` mark gross
2011-08-26 20:56 ` Rafael J. Wysocki
2011-08-26 20:56 ` [linux-pm] " Rafael J. Wysocki
2011-08-26 16:54 ` mark gross
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 03/11] PM QoS: support the dynamic devices insertion and removal jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-07-02 21:14 ` Rafael J. Wysocki
2011-07-02 21:14 ` Rafael J. Wysocki
2011-07-20 9:16 ` Jean Pihet
2011-07-20 9:16 ` Jean Pihet
2011-06-30 15:11 ` [PATCH 04/11] OMAP PM: create a PM layer plugin for per-device constraints jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 05/11] OMAP PM: early init of the pwrdms states jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 06/11] OMAP2+: powerdomain: control power domains next state jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 07/11] OMAP3: powerdomain data: add wake-up latency figures jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 08/11] OMAP4: " jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 09/11] OMAP2+: omap_hwmod: manage the wake-up latency constraints jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 10/11] OMAP: PM CONSTRAINTS: implement the devices " jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-06-30 15:11 ` [PATCH 11/11] OMAP2+: cpuidle only influences the MPU state jean.pihet
2011-06-30 15:11 ` jean.pihet
2011-07-02 19:20 ` [PATCH v2 00/11] PM QoS: add a per-device wake-up latency constraint class Rafael J. Wysocki
2011-07-04 7:16 ` Vishwanath Sripathy
2011-07-04 8:38 ` Rafael J. Wysocki
2011-07-04 8:38 ` Rafael J. Wysocki
2011-07-20 9:26 ` Jean Pihet
2011-07-20 9:26 ` Jean Pihet
2011-07-20 13:22 ` mark gross
2011-07-20 13:22 ` mark gross
2011-07-02 19:20 ` Rafael J. Wysocki
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