drm/i915: fold the hpd_irq_setup call into intel_hpd_irq_handler

We already have a vfunc for this (and other parts of the hpd storm
handling code already use it).

v2: Rebase on top of the i965g/gm sdvo hpd fix.

Cc: Egbert Eich <eich@suse.de>
Reviewed-by: Egbert Eich <eich@suse.de>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_irq.c

@@ -79,9 +79,6 @@ static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
 	[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
 };
 
-static void ibx_hpd_irq_setup(struct drm_device *dev);
-static void i915_hpd_irq_setup(struct drm_device *dev);
-
 /* For display hotplug interrupt */
 static void
 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
@@ -875,14 +872,14 @@ static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
 #define HPD_STORM_DETECT_PERIOD 1000
 #define HPD_STORM_THRESHOLD 5
 
-static inline bool intel_hpd_irq_handler(struct drm_device *dev,
+static inline void intel_hpd_irq_handler(struct drm_device *dev,
 					 u32 hotplug_trigger,
 					 const u32 *hpd)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	unsigned long irqflags;
 	int i;
-	bool ret = false;
+	bool storm_detected = false;
 
 	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
 
@@ -902,7 +899,7 @@ static inline bool intel_hpd_irq_handler(struct drm_device *dev,
 			dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
 			dev_priv->hpd_event_bits &= ~(1 << i);
 			DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
-			ret = true;
+			storm_detected = true;
 		} else {
 			dev_priv->hpd_stats[i].hpd_cnt++;
 		}
@@ -910,7 +907,8 @@ static inline bool intel_hpd_irq_handler(struct drm_device *dev,
 
 	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 
-	return ret;
+	if (storm_detected)
+		dev_priv->display.hpd_irq_setup(dev);
 }
 
 static void gmbus_irq_handler(struct drm_device *dev)
@@ -1018,8 +1016,7 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
 			DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
 					 hotplug_status);
 			if (hotplug_trigger) {
-				if (intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915))
-					i915_hpd_irq_setup(dev);
+				intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
 				queue_work(dev_priv->wq,
 					   &dev_priv->hotplug_work);
 			}
@@ -1049,8 +1046,7 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
 	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
 
 	if (hotplug_trigger) {
-		if (intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx))
-			ibx_hpd_irq_setup(dev);
+		intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
 		queue_work(dev_priv->wq, &dev_priv->hotplug_work);
 	}
 	if (pch_iir & SDE_AUDIO_POWER_MASK) {
@@ -1154,8 +1150,7 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
 	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
 
 	if (hotplug_trigger) {
-		if (intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt))
-			ibx_hpd_irq_setup(dev);
+		intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
 		queue_work(dev_priv->wq, &dev_priv->hotplug_work);
 	}
 	if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
@@ -3232,8 +3227,7 @@ static irqreturn_t i915_irq_handler(int irq, void *arg)
 			DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
 				  hotplug_status);
 			if (hotplug_trigger) {
-				if (intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915))
-					i915_hpd_irq_setup(dev);
+				intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
 				queue_work(dev_priv->wq,
 					   &dev_priv->hotplug_work);
 			}
@@ -3473,9 +3467,8 @@ static irqreturn_t i965_irq_handler(int irq, void *arg)
 			DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
 				  hotplug_status);
 			if (hotplug_trigger) {
-				if (intel_hpd_irq_handler(dev, hotplug_trigger,
-							    IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915))
-					i915_hpd_irq_setup(dev);
+				intel_hpd_irq_handler(dev, hotplug_trigger,
+						      IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915);
 				queue_work(dev_priv->wq,
 					   &dev_priv->hotplug_work);
 			}