backends/native: Convert MetaOutputColorspace to DRM Colorspace

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2890>

src/backends/native/meta-kms-connector-private.h

@@ -142,6 +142,8 @@ MetaKmsConnector * meta_kms_connector_new (MetaKmsImplDevice *impl_device,
 gboolean meta_kms_connector_is_same_as (MetaKmsConnector *connector,
                                         drmModeConnector *drm_connector);
 
+uint64_t meta_output_color_space_to_drm_color_space (MetaOutputColorspace color_space);
+
 META_EXPORT_TEST
 void meta_set_drm_hdr_metadata (MetaOutputHdrMetadata      *metadata,
                                 struct hdr_output_metadata *drm_metadata);

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

@@ -343,6 +343,20 @@ supported_drm_color_spaces_to_output_color_spaces (uint64_t drm_support)
   return supported;
 }
 
+uint64_t
+meta_output_color_space_to_drm_color_space (MetaOutputColorspace color_space)
+{
+  switch (color_space)
+    {
+    case META_OUTPUT_COLORSPACE_BT2020:
+      return META_KMS_CONNECTOR_COLORSPACE_BT2020_RGB;
+    case META_OUTPUT_COLORSPACE_UNKNOWN:
+    case META_OUTPUT_COLORSPACE_DEFAULT:
+    default:
+      return META_KMS_CONNECTOR_COLORSPACE_DEFAULT;
+    }
+}
+
 static void
 state_set_properties (MetaKmsConnectorState *state,
                       MetaKmsImplDevice     *impl_device,

src/backends/native/meta-kms-impl-device-atomic.c

@@ -245,7 +245,8 @@ process_connector_update (MetaKmsImplDevice  *impl_device,
       if (!add_connector_property (impl_device,
                                    connector, req,
                                    META_KMS_CONNECTOR_PROP_COLORSPACE,
-                                   connector_update->colorspace.value,
+                                   meta_output_color_space_to_drm_color_space (
+                                     connector_update->colorspace.value),
                                    error))
         return FALSE;
     }