drm/i915: Relocate intel_crtc_for_plane()

Move intel_crtc_for_plane() next to its only user. No one
else should ever use this.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211203112029.1057-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_crtc.c

@@ -54,20 +54,6 @@ struct intel_crtc *intel_crtc_for_pipe(struct drm_i915_private *i915,
 	return NULL;
 }
 
-struct intel_crtc *intel_crtc_for_plane(struct drm_i915_private *i915,
-					enum i9xx_plane_id i9xx_plane)
-{
-	struct intel_plane *plane;
-
-	for_each_intel_plane(&i915->drm, plane) {
-		if (plane->id == PLANE_PRIMARY &&
-		    plane->i9xx_plane == i9xx_plane)
-			return intel_crtc_for_pipe(i915, plane->pipe);
-	}
-
-	return NULL;
-}
-
 void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc)
 {
 	drm_crtc_wait_one_vblank(&crtc->base);

drivers/gpu/drm/i915/display/intel_crtc.h

@@ -32,8 +32,6 @@ void intel_wait_for_vblank_workers(struct intel_atomic_state *state);
 struct intel_crtc *intel_get_first_crtc(struct drm_i915_private *i915);
 struct intel_crtc *intel_crtc_for_pipe(struct drm_i915_private *i915,
 				       enum pipe pipe);
-struct intel_crtc *intel_crtc_for_plane(struct drm_i915_private *i915,
-					enum i9xx_plane_id plane);
 void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
 				     enum pipe pipe);
 void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);

drivers/gpu/drm/i915/intel_pm.c

@@ -2336,6 +2336,20 @@ static void i965_update_wm(struct drm_i915_private *dev_priv)
 
 #undef FW_WM
 
+static struct intel_crtc *intel_crtc_for_plane(struct drm_i915_private *i915,
+					       enum i9xx_plane_id i9xx_plane)
+{
+	struct intel_plane *plane;
+
+	for_each_intel_plane(&i915->drm, plane) {
+		if (plane->id == PLANE_PRIMARY &&
+		    plane->i9xx_plane == i9xx_plane)
+			return intel_crtc_for_pipe(i915, plane->pipe);
+	}
+
+	return NULL;
+}
+
 static void i9xx_update_wm(struct drm_i915_private *dev_priv)
 {
 	const struct intel_watermark_params *wm_info;