linux-kernel - Re: [RFC][PATCH 1/3] use new pm

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Message-Id: <200804031648.59630.jbarnes@virtuousgeek.org>
Date:	Thu, 3 Apr 2008 16:48:59 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	benh@...nel.crashing.org
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg KH <greg@...ah.com>, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexey Starikovskiy <astarikovskiy@...e.de>,
	David Brownell <david-b@...bell.net>,
	Pavel Machek <pavel@....cz>, Oliver Neukum <oliver@...kum.org>,
	Nigel Cunningham <ncunningham@...a.org.au>,
	Dave Airlie <airlied@...ux.ie>
Subject: Re: [RFC][PATCH 1/3] use new pm_ops in DRM drivers

On Thursday, April 03, 2008 2:47 pm Benjamin Herrenschmidt wrote:
> On Thu, 2008-04-03 at 11:50 -0700, Jesse Barnes wrote:
> > +static struct pm_ops i915_pm_ops = {
> > +       .prepare = NULL, /* DRM core should prevent any new ioctls? */
> > +       .complete = NULL, /* required to re-enable DRM client requests
> > */
>
> The DRM core could definitely provide generic prepare & complete that
> sync'up with user space, making sure the command streams stop etc...

Yeah, that's what I had in mind.  I'll have to think a little harder about it 
though, I think there may be some driver specific stuff required here as 
well, which would mean a driver routine that calls into a core routine (both 
of which still need to be written :).

Jesse
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