drm/i915: Add intel_uncore_suspend / resume functions

Rename intel_uncore_early_sanitize to intel_uncore_resume, dropping the
(always true) restore_forcewake argument and add a new intel_uncore_resume
function to replace the intel_uncore_forcewake_reset(dev_priv, false)
calls done from the suspend / runtime_suspend functions and make
intel_uncore_forcewake_reset private.

This is a preparation patch for adding PMIC bus access notifier support.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=155241
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: tagorereddy <tagore.chandan@gmail.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170210102802.20898-12-hdegoede@redhat.com

drivers/gpu/drm/i915/i915_drv.c

@@ -1456,7 +1456,7 @@ static int i915_drm_suspend(struct drm_device *dev)
 	opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
 	intel_opregion_notify_adapter(dev_priv, opregion_target_state);
 
-	intel_uncore_forcewake_reset(dev_priv, false);
+	intel_uncore_suspend(dev_priv);
 	intel_opregion_unregister(dev_priv);
 
 	intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
@@ -1701,7 +1701,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
 		DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
 			  ret);
 
-	intel_uncore_early_sanitize(dev_priv, true);
+	intel_uncore_resume_early(dev_priv);
 
 	if (IS_GEN9_LP(dev_priv)) {
 		if (!dev_priv->suspended_to_idle)
@@ -2343,7 +2343,7 @@ static int intel_runtime_suspend(struct device *kdev)
 		return ret;
 	}
 
-	intel_uncore_forcewake_reset(dev_priv, false);
+	intel_uncore_suspend(dev_priv);
 
 	enable_rpm_wakeref_asserts(dev_priv);
 	WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));

drivers/gpu/drm/i915/i915_drv.h

@@ -2984,14 +2984,12 @@ int intel_irq_install(struct drm_i915_private *dev_priv);
 void intel_irq_uninstall(struct drm_i915_private *dev_priv);
 
 extern void intel_uncore_sanitize(struct drm_i915_private *dev_priv);
-extern void intel_uncore_early_sanitize(struct drm_i915_private *dev_priv,
-					bool restore_forcewake);
 extern void intel_uncore_init(struct drm_i915_private *dev_priv);
 extern bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv);
 extern bool intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv);
 extern void intel_uncore_fini(struct drm_i915_private *dev_priv);
-extern void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
-					 bool restore);
+extern void intel_uncore_suspend(struct drm_i915_private *dev_priv);
+extern void intel_uncore_resume_early(struct drm_i915_private *dev_priv);
 const char *intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id);
 void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 				enum forcewake_domains domains);

drivers/gpu/drm/i915/intel_uncore.c

@@ -250,8 +250,8 @@ intel_uncore_fw_release_timer(struct hrtimer *timer)
 	return HRTIMER_NORESTART;
 }
 
-void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
-				  bool restore)
+static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
+					 bool restore)
 {
 	unsigned long irqflags;
 	struct intel_uncore_forcewake_domain *domain;
@@ -427,10 +427,14 @@ static void __intel_uncore_early_sanitize(struct drm_i915_private *dev_priv,
 	intel_uncore_forcewake_reset(dev_priv, restore_forcewake);
 }
 
-void intel_uncore_early_sanitize(struct drm_i915_private *dev_priv,
-				 bool restore_forcewake)
+void intel_uncore_suspend(struct drm_i915_private *dev_priv)
 {
-	__intel_uncore_early_sanitize(dev_priv, restore_forcewake);
+	intel_uncore_forcewake_reset(dev_priv, false);
+}
+
+void intel_uncore_resume_early(struct drm_i915_private *dev_priv)
+{
+	__intel_uncore_early_sanitize(dev_priv, true);
 	i915_check_and_clear_faults(dev_priv);
 }