drm/i915: consolidate ->num_shared_dplls assignement

In the future this won't be just for pch plls, so move it into the
shared dpll init code.

v2: Bikeshed the uncessary {} away while applying to appease
checkpatch.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.c

@@ -433,7 +433,6 @@ void intel_detect_pch(struct drm_device *dev)
 	 */
 	if (INTEL_INFO(dev)->num_pipes == 0) {
 		dev_priv->pch_type = PCH_NOP;
-		dev_priv->num_shared_dpll = 0;
 		return;
 	}
 
@@ -452,34 +451,28 @@ void intel_detect_pch(struct drm_device *dev)
 
 			if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_IBX;
-				dev_priv->num_shared_dpll = 2;
 				DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 				WARN_ON(!IS_GEN5(dev));
 			} else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_CPT;
-				dev_priv->num_shared_dpll = 2;
 				DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 			} else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 				/* PantherPoint is CPT compatible */
 				dev_priv->pch_type = PCH_CPT;
-				dev_priv->num_shared_dpll = 2;
 				DRM_DEBUG_KMS("Found PatherPoint PCH\n");
 				WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 			} else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_LPT;
-				dev_priv->num_shared_dpll = 0;
 				DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 				WARN_ON(!IS_HASWELL(dev));
 				WARN_ON(IS_ULT(dev));
 			} else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_LPT;
-				dev_priv->num_shared_dpll = 0;
 				DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 				WARN_ON(!IS_HASWELL(dev));
 				WARN_ON(!IS_ULT(dev));
 			}
-			BUG_ON(dev_priv->num_shared_dpll > I915_NUM_PLLS);
 		}
 		pci_dev_put(pch);
 	}

drivers/gpu/drm/i915/intel_display.c

@@ -8728,15 +8728,12 @@ static void intel_cpu_pll_init(struct drm_device *dev)
 		intel_ddi_pll_init(dev);
 }
 
-static void intel_shared_dpll_init(struct drm_device *dev)
+static void ibx_pch_dpll_init(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	int i;
 
-	if (dev_priv->num_shared_dpll == 0) {
-		DRM_DEBUG_KMS("No PCH PLLs on this hardware, skipping initialisation\n");
-		return;
-	}
+	dev_priv->num_shared_dpll = 2;
 
 	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
 		dev_priv->shared_dplls[i].pll_reg = _PCH_DPLL(i);
@@ -8745,6 +8742,20 @@ static void intel_shared_dpll_init(struct drm_device *dev)
 	}
 }
 
+static void intel_shared_dpll_init(struct drm_device *dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
+		ibx_pch_dpll_init(dev);
+	else
+		dev_priv->num_shared_dpll = 0;
+
+	BUG_ON(dev_priv->num_shared_dpll > I915_NUM_PLLS);
+	DRM_DEBUG_KMS("%i shared PLLs initialized\n",
+		      dev_priv->num_shared_dpll);
+}
+
 static void intel_crtc_init(struct drm_device *dev, int pipe)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;