[Intel-gfx] [PATCH 05/10] drm/i915: add assert_rpm_wakelock_held helper

[Joonas Lahtinen]

On ke, 2015-12-16 at 13:02 +0000, Chris Wilson wrote:
> On Wed, Dec 16, 2015 at 02:54:43PM +0200, Imre Deak wrote:
> > On ke, 2015-12-16 at 12:11 +0000, Chris Wilson wrote:
> > > On Tue, Dec 15, 2015 at 08:10:33PM +0200, Imre Deak wrote:
> > > > +static inline void
> > > > +assert_rpm_device_not_suspended(struct drm_i915_private
> > > > *dev_priv)
> > > > +{
> > > > +	WARN_ONCE(dev_priv->pm.suspended,
> > > > +		  "Device suspended during HW access\n");
> > > > +}
> > > 
> > > On irc, Joonas expressed a wish to see all errors during an igt
> > > run,
> > > i.e. something like
> > > 
> > > static inline void
> > > assert_rpm_device_not_suspended(struct drm_i915_private
> > > *dev_priv)
> > > {
> > > 	WARN(dev_priv->pm.suspended &&
> > > 	     atomic_inc_return(&dev_priv->pm.errors) < 0,
> > > 		  "Device suspended during HW access\n");
> > > }
> [snip]
> 
> > Sounds good, we could use this also for other PM related error
> > reporting.
> > 
> > Are you ok to do this as a follow-up?
> 
> Definitely. We haven't changed any behaviour so far, so this is a new
> feature.

I'd prefer to currently add it as WARN instead of WARN_ONCE, and then
reduce the message amount with follow-up. This way we'll get more
useful CI results immediately.

Regards, Joonas

> -Chris
> 
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation