[igt-dev] [PATCH v2 2/2] add DROP_SUSPEND.

[Chris Wilson]

Quoting Caz Yokoyama (2019-03-12 15:52:09)
> On Tue, 2019-03-12 at 15:30 +0000, Chris Wilson wrote:
> > Quoting Caz Yokoyama (2019-03-12 03:31:32)
> > > +       if (val & DROP_SUSPEND) {
> > > +               struct device *dev = i915->drm.dev;
> > > +
> > > +               dev_info(dev, "%s() %d: runtime_status: %d\n",
> > > __func__, __LINE__,
> > > +                        dev->power.runtime_status);
> > 
> > 
> > > +               pm_runtime_disable(dev);
> > > +               if (!pm_runtime_status_suspended(dev)) {
> > > +                       dev_warn(dev, "%s() %d: runtime_status:
> > > %d\n", __func__, __LINE__,
> > > +                                dev->power.runtime_status);
> > > +               }
> > > +               pm_runtime_enable(dev);
> > 
> > ret = pm_runtime_force_suspend(i915->drm.dev);
> > 
> Yes, this works. However, pm_runtime_force_suspend() always exits on 
>         if (pm_runtime_status_suspended(dev))
>                 return 0;
> Therefore, this patch is meaningless after suspended state.

Which would be fine for DROP_SUSPEND. Ah, so your intent is to do a
DROP_WAKE as well :)
-Chris