drm/i915: Move vlv/chv display irq code to a more logical place

Reshuffle the code a bit to move the vlv/chv display irq functions away
from the main irq hooks, next to the other sub (de,gt,etc.) hooks.

v2: Rebased due to changes in vlv_display_irq_reset()
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com> (v1)
Link: http://patchwork.freedesktop.org/patch/msgid/1460476604-2035-1-git-send-email-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/i915_irq.c

@@ -3285,23 +3285,6 @@ static void gen5_gt_irq_reset(struct drm_device *dev)
 		GEN5_IRQ_RESET(GEN6_PM);
 }
 
-/* drm_dma.h hooks
-*/
-static void ironlake_irq_reset(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-
-	I915_WRITE(HWSTAM, 0xffffffff);
-
-	GEN5_IRQ_RESET(DE);
-	if (IS_GEN7(dev))
-		I915_WRITE(GEN7_ERR_INT, 0xffffffff);
-
-	gen5_gt_irq_reset(dev);
-
-	ibx_irq_reset(dev);
-}
-
 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
 {
 	enum pipe pipe;
@@ -3320,6 +3303,57 @@ static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
 	dev_priv->irq_mask = ~0;
 }
 
+static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
+{
+	u32 pipestat_mask;
+	u32 iir_mask;
+	enum pipe pipe;
+
+	pipestat_mask = PIPESTAT_INT_STATUS_MASK |
+			PIPE_FIFO_UNDERRUN_STATUS;
+
+	for_each_pipe(dev_priv, pipe)
+		I915_WRITE(PIPESTAT(pipe), pipestat_mask);
+	POSTING_READ(PIPESTAT(PIPE_A));
+
+	pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
+			PIPE_CRC_DONE_INTERRUPT_STATUS;
+
+	i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
+	for_each_pipe(dev_priv, pipe)
+		i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
+
+	iir_mask = I915_DISPLAY_PORT_INTERRUPT |
+		   I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+		   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
+	if (IS_CHERRYVIEW(dev_priv))
+		iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
+	dev_priv->irq_mask &= ~iir_mask;
+
+	I915_WRITE(VLV_IIR, iir_mask);
+	I915_WRITE(VLV_IIR, iir_mask);
+	I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
+	I915_WRITE(VLV_IMR, dev_priv->irq_mask);
+	POSTING_READ(VLV_IMR);
+}
+
+/* drm_dma.h hooks
+*/
+static void ironlake_irq_reset(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	I915_WRITE(HWSTAM, 0xffffffff);
+
+	GEN5_IRQ_RESET(DE);
+	if (IS_GEN7(dev))
+		I915_WRITE(GEN7_ERR_INT, 0xffffffff);
+
+	gen5_gt_irq_reset(dev);
+
+	ibx_irq_reset(dev);
+}
+
 static void valleyview_irq_preinstall(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -3656,40 +3690,6 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
 	return 0;
 }
 
-static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
-{
-	u32 pipestat_mask;
-	u32 iir_mask;
-	enum pipe pipe;
-
-	pipestat_mask = PIPESTAT_INT_STATUS_MASK |
-			PIPE_FIFO_UNDERRUN_STATUS;
-
-	for_each_pipe(dev_priv, pipe)
-		I915_WRITE(PIPESTAT(pipe), pipestat_mask);
-	POSTING_READ(PIPESTAT(PIPE_A));
-
-	pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
-			PIPE_CRC_DONE_INTERRUPT_STATUS;
-
-	i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
-	for_each_pipe(dev_priv, pipe)
-		      i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
-
-	iir_mask = I915_DISPLAY_PORT_INTERRUPT |
-		   I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
-		   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
-	if (IS_CHERRYVIEW(dev_priv))
-		iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
-	dev_priv->irq_mask &= ~iir_mask;
-
-	I915_WRITE(VLV_IIR, iir_mask);
-	I915_WRITE(VLV_IIR, iir_mask);
-	I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
-	I915_WRITE(VLV_IMR, dev_priv->irq_mask);
-	POSTING_READ(VLV_IMR);
-}
-
 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
 {
 	assert_spin_locked(&dev_priv->irq_lock);