[mutter] kms/update: Add helper to get primary plane assignment

[Jonas Ådahl <jadahl src gnome org>]

commit 3e41568074d594f80e1383517d4a5f98c0829671
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 4 11:48:46 2019 +0200

    kms/update: Add helper to get primary plane assignment
    
    Replaces a private static function, with no functional changes made to
    it.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/826

 src/backends/native/meta-kms-impl-simple.c    | 24 ++++--------------------
 src/backends/native/meta-kms-update-private.h |  3 +++
 src/backends/native/meta-kms-update.c         | 17 +++++++++++++++++
 3 files changed, 24 insertions(+), 20 deletions(-)
---
diff --git a/src/backends/native/meta-kms-impl-simple.c b/src/backends/native/meta-kms-impl-simple.c
index 929dd950a..19c4b2b33 100644
--- a/src/backends/native/meta-kms-impl-simple.c
+++ b/src/backends/native/meta-kms-impl-simple.c
@@ -134,24 +134,6 @@ process_plane_property (MetaKmsImpl      *impl,
   return TRUE;
 }
 
-static MetaKmsPlaneAssignment *
-get_primary_plane_assignment (MetaKmsImpl   *impl,
-                              MetaKmsUpdate *update,
-                              MetaKmsCrtc   *crtc)
-{
-  GList *l;
-
-  for (l = meta_kms_update_get_plane_assignments (update); l; l = l->next)
-    {
-      MetaKmsPlaneAssignment *plane_assignment = l->data;
-
-      if (plane_assignment->crtc == crtc)
-        return plane_assignment;
-    }
-
-  return NULL;
-}
-
 static CachedModeSet *
 cached_mode_set_new (GList                 *connectors,
                      const drmModeModeInfo *drm_mode)
@@ -222,7 +204,8 @@ process_mode_set (MetaKmsImpl     *impl,
                                 &connectors,
                                 &n_connectors);
 
-      plane_assignment = get_primary_plane_assignment (impl, update, crtc);
+      plane_assignment = meta_kms_update_get_primary_plane_assignment (update,
+                                                                       crtc);
       if (!plane_assignment)
         {
           g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
@@ -632,7 +615,8 @@ process_page_flip (MetaKmsImpl      *impl,
   int ret;
 
   crtc = page_flip->crtc;
-  plane_assignment = get_primary_plane_assignment (impl, update, crtc);
+  plane_assignment = meta_kms_update_get_primary_plane_assignment (update,
+                                                                   crtc);
 
   page_flip_data = meta_kms_page_flip_data_new (impl,
                                                 crtc,
diff --git a/src/backends/native/meta-kms-update-private.h b/src/backends/native/meta-kms-update-private.h
index fe320e9b3..88e2590af 100644
--- a/src/backends/native/meta-kms-update-private.h
+++ b/src/backends/native/meta-kms-update-private.h
@@ -97,6 +97,9 @@ void meta_kms_plane_assignment_set_plane_property (MetaKmsPlaneAssignment *plane
                                                    uint32_t                prop_id,
                                                    uint64_t                value);
 
+MetaKmsPlaneAssignment * meta_kms_update_get_primary_plane_assignment (MetaKmsUpdate *update,
+                                                                       MetaKmsCrtc   *crtc);
+
 GList * meta_kms_update_get_plane_assignments (MetaKmsUpdate *update);
 
 GList * meta_kms_update_get_mode_sets (MetaKmsUpdate *update);
diff --git a/src/backends/native/meta-kms-update.c b/src/backends/native/meta-kms-update.c
index b6658e7c8..2a4a05c3e 100644
--- a/src/backends/native/meta-kms-update.c
+++ b/src/backends/native/meta-kms-update.c
@@ -235,6 +235,23 @@ meta_kms_plane_assignment_set_plane_property (MetaKmsPlaneAssignment *plane_assi
     g_list_prepend (plane_assignment->plane_properties, plane_prop);
 }
 
+MetaKmsPlaneAssignment *
+meta_kms_update_get_primary_plane_assignment (MetaKmsUpdate *update,
+                                              MetaKmsCrtc   *crtc)
+{
+  GList *l;
+
+  for (l = meta_kms_update_get_plane_assignments (update); l; l = l->next)
+    {
+      MetaKmsPlaneAssignment *plane_assignment = l->data;
+
+      if (plane_assignment->crtc == crtc)
+        return plane_assignment;
+    }
+
+  return NULL;
+}
+
 GList *
 meta_kms_update_get_plane_assignments (MetaKmsUpdate *update)
 {