From 294cf1af8cf2eb0d1eced377fdfb9a2d3f0e8b42 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 14 Nov 2017 14:55:17 +0100 Subject: [PATCH] drm/i915: Re-register PMIC bus access notifier on runtime resume Git-commit: 294cf1af8cf2eb0d1eced377fdfb9a2d3f0e8b42 Patch-mainline: v4.15-rc2 References: FATE#322643 bsc#1055900 No-fix: bedf4d79c3654921839b62246b0965ddb308b201 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 Reviewed-by: Imre Deak Signed-off-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20171114135518.15981-2-hdegoede@redhat.com (cherry picked from commit bedf4d79c3654921839b62246b0965ddb308b201) Signed-off-by: Jani Nikula Acked-by: Takashi Iwai --- drivers/gpu/drm/i915/i915_drv.c | 2 ++ drivers/gpu/drm/i915/intel_uncore.c | 6 ++++++ drivers/gpu/drm/i915/intel_uncore.h | 1 + 3 files changed, 9 insertions(+) --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -2618,6 +2618,8 @@ static int intel_runtime_resume(struct d 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). --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -434,6 +434,12 @@ void intel_uncore_resume_early(struct dr 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 = --- a/drivers/gpu/drm/i915/intel_uncore.h +++ b/drivers/gpu/drm/i915/intel_uncore.h @@ -134,6 +134,7 @@ bool intel_uncore_arm_unclaimed_mmio_det 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);