[mutter] renderer/native: Add API to get primary GPU

[Jonas Ådahl <jadahl src gnome org>]

commit 3dd8861fbf51183fd69106f55095d444cd37cc34
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Sep 12 11:50:34 2019 +0200

    renderer/native: Add API to get primary GPU
    
    Will be used when acquiring scanouts from Wayland buffers.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/798

 src/backends/native/meta-renderer-native.c | 6 ++++++
 src/backends/native/meta-renderer-native.h | 2 ++
 2 files changed, 8 insertions(+)
---
diff --git a/src/backends/native/meta-renderer-native.c b/src/backends/native/meta-renderer-native.c
index c86965b41..e4fd7c15c 100644
--- a/src/backends/native/meta-renderer-native.c
+++ b/src/backends/native/meta-renderer-native.c
@@ -313,6 +313,12 @@ meta_gbm_device_from_gpu (MetaGpuKms *gpu_kms)
   return renderer_gpu_data->gbm.device;
 }
 
+MetaGpuKms *
+meta_renderer_native_get_primary_gpu (MetaRendererNative *renderer_native)
+{
+  return renderer_native->primary_gpu_kms;
+}
+
 static MetaRendererNativeGpuData *
 meta_create_renderer_native_gpu_data (MetaGpuKms *gpu_kms)
 {
diff --git a/src/backends/native/meta-renderer-native.h b/src/backends/native/meta-renderer-native.h
index 7abe7c152..840ae1a40 100644
--- a/src/backends/native/meta-renderer-native.h
+++ b/src/backends/native/meta-renderer-native.h
@@ -51,6 +51,8 @@ MetaRendererNative * meta_renderer_native_new (MetaBackendNative  *backend_nativ
 
 struct gbm_device * meta_gbm_device_from_gpu (MetaGpuKms *gpu_kms);
 
+MetaGpuKms * meta_renderer_native_get_primary_gpu (MetaRendererNative *renderer_native);
+
 void meta_renderer_native_finish_frame (MetaRendererNative *renderer_native);
 
 int64_t meta_renderer_native_get_frame_counter (MetaRendererNative *renderer_native);