backends/native: Let the monitor manager manage KMS modes

Let MetaMonitorManagerKms manage KMS modes. This lets us pass less
state to MetaRendererNative. Instead let MetaMonitorManager tell the
monitor manager when it should set the mode and with what framebuffer.

https://bugzilla.gnome.org/show_bug.cgi?id=768976

src/backends/native/meta-monitor-manager-kms.c

@@ -1008,7 +1008,6 @@ meta_monitor_manager_kms_set_power_save_mode (MetaMonitorManager *manager,
 static void
 crtc_free (CoglKmsCrtc *crtc)
 {
-  g_free (crtc->connectors);
   g_slice_free (CoglKmsCrtc, crtc);
 }
 
@@ -1087,12 +1086,6 @@ meta_monitor_manager_kms_apply_configuration (MetaMonitorManager *manager,
       if (crtc_info->mode == NULL)
         {
           cogl_crtc->id = crtc->crtc_id;
-          cogl_crtc->x = 0;
-          cogl_crtc->y = 0;
-          cogl_crtc->count = 0;
-          memset (&cogl_crtc->mode, 0, sizeof (drmModeModeInfo));
-          cogl_crtc->connectors = NULL;
-          cogl_crtc->count = 0;
 
           crtc->rect.x = 0;
           crtc->rect.y = 0;
@@ -1109,11 +1102,11 @@ meta_monitor_manager_kms_apply_configuration (MetaMonitorManager *manager,
 
           mode = crtc_info->mode;
 
+          n_connectors = crtc_info->outputs->len;
+          connectors = g_new (uint32_t, n_connectors);
+
           cogl_crtc->id = crtc->crtc_id;
-          cogl_crtc->x = crtc_info->x;
-          cogl_crtc->y = crtc_info->y;
-          cogl_crtc->count = n_connectors = crtc_info->outputs->len;
-          cogl_crtc->connectors = connectors = g_new (uint32_t, n_connectors);
+          cogl_crtc->connected = n_connectors > 0;
 
           for (j = 0; j < n_connectors; j++)
             {
@@ -1125,9 +1118,6 @@ meta_monitor_manager_kms_apply_configuration (MetaMonitorManager *manager,
               output->crtc = crtc;
             }
 
-          memcpy (&cogl_crtc->mode, crtc_info->mode->driver_private,
-                  sizeof (drmModeModeInfo));
-
           if (meta_monitor_transform_is_rotated (crtc_info->transform))
             {
               width = mode->height;
@@ -1177,12 +1167,6 @@ meta_monitor_manager_kms_apply_configuration (MetaMonitorManager *manager,
       g_ptr_array_add (cogl_crtcs, cogl_crtc);
 
       cogl_crtc->id = crtc->crtc_id;
-      cogl_crtc->x = 0;
-      cogl_crtc->y = 0;
-      cogl_crtc->count = 0;
-      memset (&cogl_crtc->mode, 0, sizeof (drmModeModeInfo));
-      cogl_crtc->connectors = NULL;
-      cogl_crtc->count = 0;
 
       crtc->rect.x = 0;
       crtc->rect.y = 0;
@@ -1314,6 +1298,72 @@ meta_monitor_manager_kms_init (MetaMonitorManagerKms *manager_kms)
   manager_kms->desktop_settings = g_settings_new ("org.gnome.desktop.interface");
 }
 
+static void
+get_crtc_connectors (MetaMonitorManager *manager,
+                     MetaCRTC           *crtc,
+                     uint32_t          **connectors,
+                     unsigned int       *n_connectors)
+{
+  GArray *connectors_array = NULL;
+  unsigned int i;
+
+  for (i = 0; i < manager->n_outputs; i++)
+    {
+      MetaOutput *output = &manager->outputs[i];
+
+      if (output->crtc == crtc)
+        {
+          if (!connectors_array)
+            connectors_array = g_array_new (FALSE, FALSE, sizeof (uint32_t));
+          g_array_append_val (connectors_array, output->winsys_id);
+        }
+    }
+
+  if (connectors_array)
+    {
+      *connectors = (uint32_t *) connectors_array->data;
+      *n_connectors = connectors_array->len;
+    }
+  else
+    {
+      *connectors = NULL;
+      *n_connectors = 0;
+    }
+}
+
+void
+meta_monitor_manager_kms_apply_crtc_modes (MetaMonitorManagerKms *manager_kms,
+                                           uint32_t               fb_id)
+{
+  MetaMonitorManager *manager = META_MONITOR_MANAGER (manager_kms);
+  unsigned int i;
+
+  for (i = 0; i < manager->n_crtcs; i++)
+    {
+      MetaCRTC *crtc = &manager->crtcs[i];
+      uint32_t *connectors;
+      unsigned int n_connectors;
+      drmModeModeInfo *mode;
+
+      get_crtc_connectors (manager, crtc, &connectors, &n_connectors);
+
+      if (connectors)
+        mode = crtc->current_mode->driver_private;
+      else
+        mode = NULL;
+
+      if (drmModeSetCrtc (manager_kms->fd,
+                          crtc->crtc_id,
+                          fb_id,
+                          crtc->rect.x, crtc->rect.y,
+                          connectors, n_connectors,
+                          mode) != 0)
+        g_warning ("Failed to set CRTC mode %s: %m", crtc->current_mode->name);
+
+      g_free (connectors);
+    }
+}
+
 static void
 meta_monitor_manager_kms_dispose (GObject *object)
 {

src/backends/native/meta-monitor-manager-kms.h

@@ -37,4 +37,7 @@ typedef struct _MetaMonitorManagerKms         MetaMonitorManagerKms;
 
 GType meta_monitor_manager_kms_get_type (void);
 
+void meta_monitor_manager_kms_apply_crtc_modes (MetaMonitorManagerKms *manager_kms,
+                                                uint32_t               fb_id);
+
 #endif /* META_MONITOR_MANAGER_KMS_H */

src/backends/native/meta-renderer-native.c

@@ -47,6 +47,7 @@
 #include <xf86drm.h>
 
 #include "backends/meta-backend-private.h"
+#include "backends/native/meta-monitor-manager-kms.h"
 #include "backends/native/meta-renderer-native.h"
 #include "cogl/cogl.h"
 
@@ -332,22 +333,13 @@ fail:
 static void
 setup_crtc_modes (CoglDisplay *display, int fb_id)
 {
-  CoglRendererEGL *egl_renderer = display->renderer->winsys;
-  MetaRendererNative *renderer_native = egl_renderer->platform;
-  GList *l;
+  MetaBackend *backend = meta_get_backend ();
+  MetaMonitorManager *monitor_manager =
+    meta_backend_get_monitor_manager (backend);
+  MetaMonitorManagerKms *monitor_manager_kms =
+    META_MONITOR_MANAGER_KMS (monitor_manager);
 
-  for (l = renderer_native->crtcs; l; l = l->next)
-    {
-      CoglKmsCrtc *crtc = l->data;
-
-      int ret = drmModeSetCrtc (renderer_native->kms_fd,
-                                crtc->id,
-                                fb_id, crtc->x, crtc->y,
-                                crtc->connectors, crtc->count,
-                                crtc->count ? &crtc->mode : NULL);
-      if (ret)
-        g_warning ("Failed to set crtc mode %s: %m", crtc->mode.name);
-    }
+  meta_monitor_manager_kms_apply_crtc_modes (monitor_manager_kms, fb_id);
 }
 
 static void
@@ -363,7 +355,7 @@ flip_all_crtcs (CoglDisplay *display, CoglFlipKMS *flip, int fb_id)
       CoglKmsCrtc *crtc = l->data;
       int ret = 0;
 
-      if (crtc->count == 0 || crtc->ignore)
+      if (!crtc->connected || crtc->ignore)
         continue;
 
       needs_flip = TRUE;
@@ -392,7 +384,6 @@ flip_all_crtcs (CoglDisplay *display, CoglFlipKMS *flip, int fb_id)
 static void
 crtc_free (CoglKmsCrtc *crtc)
 {
-  g_free (crtc->connectors);
   g_slice_free (CoglKmsCrtc, crtc);
 }
 
@@ -404,7 +395,6 @@ crtc_copy (CoglKmsCrtc *from)
   new = g_slice_new (CoglKmsCrtc);
 
   *new = *from;
-  new->connectors = g_memdup (from->connectors, from->count * sizeof(uint32_t));
 
   return new;
 }

src/backends/native/meta-renderer-native.h

@@ -32,11 +32,8 @@
 
 typedef struct {
   uint32_t id;
-  uint32_t x, y;
-  drmModeModeInfo mode;
 
-  uint32_t *connectors;
-  uint32_t  count;
+  gboolean connected;
 
   CoglBool  ignore;
 } CoglKmsCrtc;