Preliminary atomic patch

ui/ozone/platform/drm/gpu/drm_device.cc

Index: ui/ozone/platform/drm/gpu/drm_device.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_device.cc b/ui/ozone/platform/drm/gpu/drm_device.cc
index 03ca9aa476946456ee29001b3f2bd571cbe8b13d..fe95a622ca04eb01255310bb612255d75a3a831e 100644
--- a/ui/ozone/platform/drm/gpu/drm_device.cc
+++ b/ui/ozone/platform/drm/gpu/drm_device.cc
@@ -21,6 +21,10 @@
 #include "ui/ozone/platform/drm/gpu/drm_util.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.h"
 
+#if defined(USE_DRM_ATOMIC)
+#include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.h"
+#endif
+
 namespace ui {
 
 namespace {
@@ -200,7 +204,11 @@ bool DrmDevice::Initialize() {
     return false;
   }
 
+#if defined(USE_DRM_ATOMIC)
+  plane_manager_.reset(new HardwareDisplayPlaneManagerAtomic());
+#else
   plane_manager_.reset(new HardwareDisplayPlaneManagerLegacy());
+#endif  // defined(USE_DRM_ATOMIC)
   if (!plane_manager_->Initialize(this)) {
     LOG(ERROR) << "Failed to initialize the plane manager for "
                << device_path_.value();
@@ -440,6 +448,24 @@ void DrmDevice::DestroyDumbBuffer(const SkImageInfo& info,
   DrmDestroyDumbBuffer(file_.GetPlatformFile(), handle);
 }
 
+bool DrmDevice::CommitProperties(drmModePropertySet* properties,
+                                 uint32_t flags,
+                                 const PageFlipCallback& callback) {
+#if defined(USE_DRM_ATOMIC)
+  scoped_ptr<PageFlipPayload> payload(
+      new PageFlipPayload(base::ThreadTaskRunnerHandle::Get(), callback));
+  if (!drmModePropertySetCommit(file_.GetPlatformFile(), flags, payload.get(),
+                                properties)) {
+    // If successful the payload will be removed by the event
+    ignore_result(payload.release());
+    return true;
+  }
+  return false;
+#else
+  return false;
+#endif  // defined(USE_DRM_ATOMIC)
+}
+
 bool DrmDevice::SetMaster() {
   DCHECK(file_.IsValid());
   return (drmSetMaster(file_.GetPlatformFile()) == 0);