[mutter] gpu-kms: Pass GPU on page flip callbacks

[Jonas Ådahl <jadahl src gnome org>]

commit 376dcd3b92931635306c357e0d7e2cb3f3073495
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Jul 24 17:29:22 2017 +0800

    gpu-kms: Pass GPU on page flip callbacks
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785381

 src/backends/native/meta-gpu-kms.c         |   43 ++++++++++++++++++++++------
 src/backends/native/meta-renderer-native.c |    3 +-
 2 files changed, 36 insertions(+), 10 deletions(-)
---
diff --git a/src/backends/native/meta-gpu-kms.c b/src/backends/native/meta-gpu-kms.c
index 0b70c38..38c2e9b 100644
--- a/src/backends/native/meta-gpu-kms.c
+++ b/src/backends/native/meta-gpu-kms.c
@@ -150,13 +150,19 @@ meta_gpu_kms_apply_crtc_mode (MetaGpuKms *gpu_kms,
 }
 
 static void
-invoke_flip_closure (GClosure *flip_closure)
-{
-  GValue param = G_VALUE_INIT;
-
-  g_value_init (&param, G_TYPE_POINTER);
-  g_value_set_pointer (&param, flip_closure);
-  g_closure_invoke (flip_closure, NULL, 1, &param, NULL);
+invoke_flip_closure (GClosure   *flip_closure,
+                     MetaGpuKms *gpu_kms)
+{
+  GValue params[] = {
+    G_VALUE_INIT,
+    G_VALUE_INIT
+  };
+
+  g_value_init (&params[0], G_TYPE_POINTER);
+  g_value_set_pointer (&params[0], flip_closure);
+  g_value_init (&params[1], G_TYPE_OBJECT);
+  g_value_set_object (&params[1], gpu_kms);
+  g_closure_invoke (flip_closure, NULL, 2, params, NULL);
   g_closure_unref (flip_closure);
 }
 
@@ -169,6 +175,8 @@ meta_gpu_kms_is_crtc_active (MetaGpuKms *gpu_kms,
   GList *l;
   gboolean connected_crtc_found;
 
+  g_assert (meta_crtc_get_gpu (crtc) == META_GPU (gpu_kms));
+
   if (monitor_manager->power_save_mode != META_POWER_SAVE_ON)
     return FALSE;
 
@@ -190,6 +198,12 @@ meta_gpu_kms_is_crtc_active (MetaGpuKms *gpu_kms,
   return TRUE;
 }
 
+typedef struct _GpuClosureContainer
+{
+  GClosure *flip_closure;
+  MetaGpuKms *gpu_kms;
+} GpuClosureContainer;
+
 gboolean
 meta_gpu_kms_flip_crtc (MetaGpuKms *gpu_kms,
                         MetaCrtc   *crtc,
@@ -213,15 +227,23 @@ meta_gpu_kms_flip_crtc (MetaGpuKms *gpu_kms,
 
   if (!gpu_kms->page_flips_not_supported)
     {
+      GpuClosureContainer *closure_container;
       int kms_fd = meta_gpu_kms_get_fd (gpu_kms);
 
+      closure_container = g_new0 (GpuClosureContainer, 1);
+      *closure_container = (GpuClosureContainer) {
+        .flip_closure = flip_closure,
+        .gpu_kms = gpu_kms
+      };
+
       ret = drmModePageFlip (kms_fd,
                              crtc->crtc_id,
                              fb_id,
                              DRM_MODE_PAGE_FLIP_EVENT,
-                             flip_closure);
+                             closure_container);
       if (ret != 0 && ret != -EACCES)
         {
+          g_free (closure_container);
           g_warning ("Failed to flip: %s", strerror (-ret));
           gpu_kms->page_flips_not_supported = TRUE;
         }
@@ -252,9 +274,12 @@ page_flip_handler (int           fd,
                    unsigned int  usec,
                    void         *user_data)
 {
-  GClosure *flip_closure = user_data;
+  GpuClosureContainer *closure_container = user_data;
+  GClosure *flip_closure = closure_container->flip_closure;
+  MetaGpuKms *gpu_kms = closure_container->gpu_kms;
 
-  invoke_flip_closure (flip_closure);
+  invoke_flip_closure (flip_closure, gpu_kms);
+  g_free (closure_container);
 }
 
 gboolean
diff --git a/src/backends/native/meta-renderer-native.c b/src/backends/native/meta-renderer-native.c
index ede5ac3..c986bd7 100644
--- a/src/backends/native/meta-renderer-native.c
+++ b/src/backends/native/meta-renderer-native.c
@@ -548,6 +548,7 @@ meta_onscreen_native_swap_drm_fb (CoglOnscreen *onscreen)
 
 static void
 on_crtc_flipped (GClosure         *closure,
+                 MetaGpuKms       *gpu_kms,
                  MetaRendererView *view)
 {
   ClutterStageView *stage_view = CLUTTER_STAGE_VIEW (view);
@@ -852,7 +853,7 @@ meta_onscreen_native_flip_crtcs (CoglOnscreen *onscreen)
   flip_closure = g_cclosure_new (G_CALLBACK (on_crtc_flipped),
                                  g_object_ref (view),
                                  (GClosureNotify) flip_closure_destroyed);
-  g_closure_set_marshal (flip_closure, g_cclosure_marshal_VOID__VOID);
+  g_closure_set_marshal (flip_closure, g_cclosure_marshal_VOID__OBJECT);
 
   /* Either flip the CRTC's of the monitor info, if we are drawing just part
    * of the stage, or all of the CRTC's if we are drawing the whole stage.