monitor-config-manager: Consider leased CRTCs assigned

With leasing, we will give another client control over connectors but
they also need a CRTC to drive them. Those CRTCs won't be available to
the desktop/monitor-manager.

Co-authored-by: Sebastian Wick <sebastian.wick@redhat.com>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3746>

src/backends/meta-crtc.c

@@ -470,3 +470,14 @@ meta_crtc_config_new (graphene_rect_t      *layout,
 
   return config;
 }
+
+gboolean
+meta_crtc_is_leased (MetaCrtc *crtc)
+{
+  MetaCrtcClass *klass = META_CRTC_GET_CLASS (crtc);
+
+  if (klass->is_leased)
+    return klass->is_leased (crtc);
+  else
+    return FALSE;
+}

src/backends/meta-crtc.h

@@ -55,6 +55,8 @@ struct _MetaCrtcClass
   void (* set_config) (MetaCrtc             *crtc,
                        const MetaCrtcConfig *config,
                        gpointer              backend_private);
+
+  gboolean (* is_leased) (MetaCrtc *crtc);
 };
 
 META_EXPORT_TEST
@@ -132,4 +134,6 @@ MetaCrtcConfig * meta_crtc_config_new (graphene_rect_t      *layout,
                                        MetaCrtcMode         *mode,
                                        MetaMonitorTransform  transform);
 
+gboolean meta_crtc_is_leased (MetaCrtc *crtc);
+
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (MetaGammaLut, meta_gamma_lut_free)

src/backends/meta-monitor-config-manager.c

@@ -99,6 +99,9 @@ is_crtc_assigned (MetaCrtc  *crtc,
 {
   unsigned int i;
 
+  if (meta_crtc_is_leased (crtc))
+    return TRUE;
+
   for (i = 0; i < crtc_assignments->len; i++)
     {
       MetaCrtcAssignment *assigned_crtc_assignment =

src/backends/native/meta-crtc-kms.c

@@ -326,6 +326,15 @@ meta_crtc_kms_set_config (MetaCrtc             *crtc,
   crtc_kms->assigned_cursor_plane = kms_assignment->cursor_plane;
 }
 
+static gboolean
+meta_crtc_kms_is_leased (MetaCrtc *crtc)
+{
+  MetaCrtcKms *crtc_kms = META_CRTC_KMS (crtc);
+  MetaKmsCrtc *kms_crtc = meta_crtc_kms_get_kms_crtc (crtc_kms);
+
+  return meta_kms_crtc_is_leased (kms_crtc);
+}
+
 static gboolean
 meta_crtc_kms_is_transform_handled (MetaCrtcNative       *crtc_native,
                                     MetaMonitorTransform  transform)
@@ -476,6 +485,7 @@ meta_crtc_kms_class_init (MetaCrtcKmsClass *klass)
   crtc_class->set_gamma_lut = meta_crtc_kms_set_gamma_lut;
   crtc_class->assign_extra = meta_crtc_kms_assign_extra;
   crtc_class->set_config = meta_crtc_kms_set_config;
+  crtc_class->is_leased = meta_crtc_kms_is_leased;
 
   crtc_native_class->is_transform_handled = meta_crtc_kms_is_transform_handled;
   crtc_native_class->is_hw_cursor_supported = meta_crtc_kms_is_hw_cursor_supported;

src/backends/native/meta-kms-crtc.c

@@ -50,6 +50,8 @@ struct _MetaKmsCrtc
   MetaKmsCrtcState current_state;
 
   MetaKmsCrtcPropTable prop_table;
+
+  gboolean is_leased;
 };
 
 G_DEFINE_TYPE (MetaKmsCrtc, meta_kms_crtc, G_TYPE_OBJECT)
@@ -107,6 +109,12 @@ meta_kms_crtc_is_active (MetaKmsCrtc *crtc)
   return crtc->current_state.is_active;
 }
 
+gboolean
+meta_kms_crtc_is_leased (MetaKmsCrtc *crtc)
+{
+  return crtc->is_leased;
+}
+
 static void
 read_crtc_gamma (MetaKmsCrtc       *crtc,
                  MetaKmsCrtcState  *crtc_state,

src/backends/native/meta-kms-crtc.h

@@ -65,3 +65,5 @@ int meta_kms_crtc_get_idx (MetaKmsCrtc *crtc);
 
 META_EXPORT_TEST
 gboolean meta_kms_crtc_is_active (MetaKmsCrtc *crtc);
+
+gboolean meta_kms_crtc_is_leased (MetaKmsCrtc *crtc);