drm/i915: add single combo phy init/unit functions

Work on the principle that files should prefer not to expose platform
specific functions.

v2, v3: Rebase

Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190502145234.7002-1-jani.nikula@intel.com

drivers/gpu/drm/i915/intel_combo_phy.c

@@ -148,7 +148,7 @@ static bool cnl_combo_phy_verify_state(struct drm_i915_private *dev_priv)
 	return ret;
 }
 
-void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
+static void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
 {
 	u32 val;
 
@@ -168,7 +168,7 @@ void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
 	I915_WRITE(CNL_PORT_CL1CM_DW5, val);
 }
 
-void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv)
+static void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv)
 {
 	u32 val;
 
@@ -256,7 +256,7 @@ void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
 	I915_WRITE(ICL_PORT_CL_DW10(port), val);
 }
 
-void icl_combo_phys_init(struct drm_i915_private *dev_priv)
+static void icl_combo_phys_init(struct drm_i915_private *dev_priv)
 {
 	enum port port;
 
@@ -285,7 +285,7 @@ void icl_combo_phys_init(struct drm_i915_private *dev_priv)
 	}
 }
 
-void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
+static void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
 {
 	enum port port;
 
@@ -306,3 +306,19 @@ void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
 		I915_WRITE(ICL_PORT_COMP_DW0(port), val);
 	}
 }
+
+void intel_combo_phy_init(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_combo_phys_init(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_combo_phys_init(i915);
+}
+
+void intel_combo_phy_uninit(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_combo_phys_uninit(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_combo_phys_uninit(i915);
+}

drivers/gpu/drm/i915/intel_combo_phy.h

@@ -11,10 +11,8 @@
 
 struct drm_i915_private;
 
-void icl_combo_phys_init(struct drm_i915_private *dev_priv);
-void icl_combo_phys_uninit(struct drm_i915_private *dev_priv);
-void cnl_combo_phys_init(struct drm_i915_private *dev_priv);
-void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv);
+void intel_combo_phy_init(struct drm_i915_private *dev_priv);
+void intel_combo_phy_uninit(struct drm_i915_private *dev_priv);
 void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
 				    enum port port, bool is_dsi,
 				    int lane_count, bool lane_reversal);

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -1140,7 +1140,7 @@ static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
 		 * PHY's HW context for port B is lost after DC transitions,
 		 * so we need to restore it manually.
 		 */
-		icl_combo_phys_init(dev_priv);
+		intel_combo_phy_init(dev_priv);
 }
 
 static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
@@ -3779,7 +3779,7 @@ static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume
 	intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
 
 	/* 2-3. */
-	cnl_combo_phys_init(dev_priv);
+	intel_combo_phy_init(dev_priv);
 
 	/*
 	 * 4. Enable Power Well 1 (PG1).
@@ -3828,7 +3828,7 @@ static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
 	usleep_range(10, 30);		/* 10 us delay per Bspec */
 
 	/* 5. */
-	cnl_combo_phys_uninit(dev_priv);
+	intel_combo_phy_uninit(dev_priv);
 }
 
 void icl_display_core_init(struct drm_i915_private *dev_priv,
@@ -3843,7 +3843,7 @@ void icl_display_core_init(struct drm_i915_private *dev_priv,
 	intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
 
 	/* 2. Initialize all combo phys */
-	icl_combo_phys_init(dev_priv);
+	intel_combo_phy_init(dev_priv);
 
 	/*
 	 * 3. Enable Power Well 1 (PG1).
@@ -3893,7 +3893,7 @@ void icl_display_core_uninit(struct drm_i915_private *dev_priv)
 	mutex_unlock(&power_domains->lock);
 
 	/* 5. */
-	icl_combo_phys_uninit(dev_priv);
+	intel_combo_phy_uninit(dev_priv);
 }
 
 static void chv_phy_control_init(struct drm_i915_private *dev_priv)