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 5f87095686efcd183a973db0edf420ecdfa05264..1b2ca332d579cfc7830c320f32ce588b2f24670c 100644
--- a/ui/ozone/platform/drm/gpu/drm_device.cc
+++ b/ui/ozone/platform/drm/gpu/drm_device.cc
@@ -19,6 +19,9 @@
 #include "base/trace_event/trace_event.h"
 #include "third_party/skia/include/core/SkImageInfo.h"
 #include "ui/ozone/platform/drm/gpu/drm_util.h"
+#if defined(OZONE_USE_ATOMIC)
+#include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_atomic.h"
+#endif
 #include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.h"
 
 namespace ui {
@@ -199,7 +202,11 @@ bool DrmDevice::Initialize() {
     return false;
   }
 
+#if defined(OZONE_USE_ATOMIC)
+  plane_manager_.reset(new HardwareDisplayPlaneManagerAtomic());
+#else
   plane_manager_.reset(new HardwareDisplayPlaneManagerLegacy());
+#endif
   if (!plane_manager_->Initialize(this)) {
     LOG(ERROR) << "Failed to initialize the plane manager for "
                << device_path_.value();
@@ -439,6 +446,17 @@ void DrmDevice::DestroyDumbBuffer(const SkImageInfo& info,
   DrmDestroyDumbBuffer(file_.GetPlatformFile(), handle);
 }
 
+bool DrmDevice::CommitProperties(drmModePropertySet* properties,
+                                 uint32_t flags,
+                                 void* user_ptr) {
+#if defined(OZONE_USE_ATOMIC)
+  return drmModePropertySetCommit(file_.GetPlatformFile(), flags, user_ptr,
+                                  properties) == 0;
+#else
+  return false;
+#endif
+}
+
 bool DrmDevice::SetMaster() {
   DCHECK(file_.IsValid());
   return (drmSetMaster(file_.GetPlatformFile()) == 0);