[Ozone-DRM] Move vsync logic into DrmWindow

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

Index: ui/ozone/platform/drm/gpu/drm_window.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_window.cc b/ui/ozone/platform/drm/gpu/drm_window.cc
index 1b33a1e6419b7bf166900546fdb4e67e59cdd327..caf179ea70786cec666df23fc9de7adcc8417d87 100644
--- a/ui/ozone/platform/drm/gpu/drm_window.cc
+++ b/ui/ozone/platform/drm/gpu/drm_window.cc
@@ -4,11 +4,13 @@
 
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
 
+#include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "third_party/skia/include/core/SkSurface.h"
 #include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+#include "ui/ozone/platform/drm/gpu/crtc_controller.h"
 #include "ui/ozone/platform/drm/gpu/drm_buffer.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
@@ -182,6 +184,28 @@ const OverlayPlane* DrmWindow::GetLastModesetBuffer() {
   return OverlayPlane::GetPrimaryPlane(last_submitted_planes_);
 }
 
+void DrmWindow::GetVSyncParameters(
+    const gfx::VSyncProvider::UpdateVSyncCallback& callback) const {
+  if (!controller_)
+    return;
+
+  // If we're in mirror mode the 2 CRTCs should have similar modes with the same
+  // refresh rates.
+  CrtcController* crtc = controller_->crtc_controllers()[0];
+  // The value is invalid, so we can't update the parameters.
+  if (controller_->GetTimeOfLastFlip() == 0 || crtc->mode().vrefresh == 0)
+    return;
+
+  // Stores the time of the last refresh.
+  base::TimeTicks timebase =
+      base::TimeTicks::FromInternalValue(controller_->GetTimeOfLastFlip());
+  // Stores the refresh rate.
+  base::TimeDelta interval =
+      base::TimeDelta::FromSeconds(1) / crtc->mode().vrefresh;
+
+  callback.Run(timebase, interval);
+}
+
 void DrmWindow::ResetCursor(bool bitmap_only) {
   if (!controller_)
     return;