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drm/i915: Re-register PMIC bus access notifier on runtime resume

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intel_uncore_suspend() unregisters the uncore code's PMIC bus access
notifier and gets called on both normal and runtime suspend.

intel_uncore_resume_early() re-registers the notifier, but only on
normal resume. Add a new intel_uncore_runtime_resume() function which
only re-registers the notifier and call that on runtime resume.

Cc: stable@vger.kernel.org
Reported-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171114135518.15981-2-hdegoede@redhat.com
(cherry picked from commit bedf4d79c3)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Hans de Goede 2017-11-14 14:55:17 +01:00 committed by Jani Nikula
parent f4359cedfb
commit 294cf1af8c
3 changed files with 9 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_drv.c
View file

@ -2618,6 +2618,8 @@ static int intel_runtime_resume(struct device *kdev)
ret = vlv_resume_prepare(dev_priv, true);
}
intel_uncore_runtime_resume(dev_priv);
/*
* No point of rolling back things in case of an error, as the best
* we can do is to hope that things will still work (and disable RPM).

6
drivers/gpu/drm/i915/intel_uncore.c
View file

@ -434,6 +434,12 @@ void intel_uncore_resume_early(struct drm_i915_private *dev_priv)
i915_check_and_clear_faults(dev_priv);
}
void intel_uncore_runtime_resume(struct drm_i915_private *dev_priv)
{
iosf_mbi_register_pmic_bus_access_notifier(
&dev_priv->uncore.pmic_bus_access_nb);
}
void intel_uncore_sanitize(struct drm_i915_private *dev_priv)
{
i915_modparams.enable_rc6 =

1
drivers/gpu/drm/i915/intel_uncore.h
View file

@ -134,6 +134,7 @@ bool intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv
void intel_uncore_fini(struct drm_i915_private *dev_priv);
void intel_uncore_suspend(struct drm_i915_private *dev_priv);
void intel_uncore_resume_early(struct drm_i915_private *dev_priv);
void intel_uncore_runtime_resume(struct drm_i915_private *dev_priv);
u64 intel_uncore_edram_size(struct drm_i915_private *dev_priv);
void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);