On Tue, Mar 18, 2014 at 05:41:54PM -0700, Ben Widawsky wrote: > On Tue, Mar 18, 2014 at 04:31:03PM +0100, Daniel Vetter wrote: > > This is a regression introduced in > > > > commit 0294ae7b44bba7ab0d4cef9a8736287f38bdb4fd > > Author: Chris Wilson <ch...@chris-wilson.co.uk> > > Date: Thu Mar 13 12:00:29 2014 +0000 > > > > drm/i915: Consolidate forcewake resetting to a single function > > > > The reordered setup sequence ended up calling del_timer_sync before > > the timer was set up correctly, resulting in endless hilarity when > > loading the driver. > > > > Compared to Ben's patch (which moved around the setup_timer call to > > sanitize_early) this moves the sanitize_early call around in the > > driver load call. This way we avoid calling setup_timer again in the > > resume code (where we also call sanitize_early). > > > > Cc: Chris Wilson <ch...@chris-wilson.co.uk> > > Cc: Mika Kuoppala <mika.kuopp...@intel.com> > > Cc: Ben Widawsky <benjamin.widaw...@intel.com> > > Tested-by: Rodrigo Vivi <rodrigo.v...@gmail.com> > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76242 > > Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch> > > --- > > drivers/gpu/drm/i915/i915_dma.c | 2 -- > > drivers/gpu/drm/i915/intel_uncore.c | 2 ++ > > 2 files changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/i915_dma.c > > b/drivers/gpu/drm/i915/i915_dma.c > > index e4d2b9f15ae2..9faee49f210d 100644 > > --- a/drivers/gpu/drm/i915/i915_dma.c > > +++ b/drivers/gpu/drm/i915/i915_dma.c > > @@ -1608,8 +1608,6 @@ int i915_driver_load(struct drm_device *dev, unsigned > > long flags) > > goto put_bridge; > > } > > > > - intel_uncore_early_sanitize(dev); > > - > > /* This must be called before any calls to HAS_PCH_* */ > > intel_detect_pch(dev); > > > > diff --git a/drivers/gpu/drm/i915/intel_uncore.c > > b/drivers/gpu/drm/i915/intel_uncore.c > > index e2e328d86aff..c3832d9270a6 100644 > > --- a/drivers/gpu/drm/i915/intel_uncore.c > > +++ b/drivers/gpu/drm/i915/intel_uncore.c > > @@ -736,6 +736,8 @@ void intel_uncore_init(struct drm_device *dev) > > setup_timer(&dev_priv->uncore.force_wake_timer, > > gen6_force_wake_timer, (unsigned long)dev_priv); > > > > + intel_uncore_early_sanitize(dev); > > + > > if (IS_VALLEYVIEW(dev)) { > > dev_priv->uncore.funcs.force_wake_get = __vlv_force_wake_get; > > dev_priv->uncore.funcs.force_wake_put = __vlv_force_wake_put; > > If you only want to setup_timer once, the setup_timer call should be in > intel_uncore_init() which is the only one called only at load time. And > of course, this is where the bug is. Otherwise, thaw calls > uncore_early_sanitize, which will setup_timer again (which I thought was > your complaint with my original patch).
I don't think we want to stop checking for garbage in the forcewake registers upon resume though? -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
