Re: [PATCH] i915: send D1 opregion notification

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Tue, 14 Jan 2014 15:06:46 -0800
Kristen Carlson Accardi <kristen@linux.intel.com> wrote:

> On Tue, 14 Jan 2014 11:19:44 -0800
> Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> 
> > On Tue, 14 Jan 2014 10:26:02 +0100
> > Daniel Vetter <daniel@ffwll.ch> wrote:
> > 
> > > On Mon, Jan 13, 2014 at 01:32:45PM -0800, Kristen Carlson Accardi wrote:
> > > > The opregion notification for runtime suspend should be D1, not D3.
> > > > This is to maintain compatibility with firmware.
> > > > 
> > > > Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
> > > > ---
> > > >  drivers/gpu/drm/i915/i915_drv.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > 
> > > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > > > index 61fb9fc..a6c370a 100644
> > > > --- a/drivers/gpu/drm/i915/i915_drv.c
> > > > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > > > @@ -925,7 +925,7 @@ static int i915_runtime_suspend(struct device *device)
> > > >  
> > > >  	del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
> > > >  	dev_priv->pm.suspended = true;
> > > > -	intel_opregion_notify_adapter(dev, PCI_D3cold);
> > > > +	intel_opregion_notify_adapter(dev, PCI_D1);
> > > 
> > > This needs a bigger comment and some mention on which platforms we exactly
> > > need this ... Or do the bios people plan to stick to this for bdw/vlv and
> > > all the further stuff?
> > 
> > Doc # would help too, even if it's CDI or internal only... I don't know
> > where to find this info, or if I did I've forgotten.
> > 
> > Thanks,
> 
> hahhah, you crack me up with all this "doc" stuff.  There is no doc.

Can you file an HSD or something on that internally?  Seems like it
should at least be part of the OpRegion spec or something...

-- 
Jesse Barnes, Intel Open Source Technology Center