ozone: Allocate scanout buffer according to KMS modifiers

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

Index: ui/ozone/platform/drm/gpu/hardware_display_controller.cc
diff --git a/ui/ozone/platform/drm/gpu/hardware_display_controller.cc b/ui/ozone/platform/drm/gpu/hardware_display_controller.cc
index c45ed81146759ef83c64fe507846e9ef399d2ea8..f53c45c23bb3f4da40ce43ee11a04930db03164f 100644
--- a/ui/ozone/platform/drm/gpu/hardware_display_controller.cc
+++ b/ui/ozone/platform/drm/gpu/hardware_display_controller.cc
@@ -143,6 +143,29 @@ bool HardwareDisplayController::IsFormatSupported(uint32_t fourcc_format,
   return true;
 }
 
+std::vector<uint64_t> HardwareDisplayController::GetFormatModifiers(
+    uint32_t format) {
+  std::vector<uint64_t> modifiers;
+
+  if (crtc_controllers_.empty())
+    return modifiers;
+
+  modifiers = crtc_controllers_[0]->GetFormatModifiers(format);
+
+  for (size_t i = 1; i < crtc_controllers_.size(); ++i) {
+    std::vector<uint64_t> other =
+      crtc_controllers_[i]->GetFormatModifiers(format);
+    std::vector<uint64_t> intersection;
+
+    std::set_intersection(modifiers.begin(), modifiers.end(),
+                          other.begin(), other.end(),
+                          std::back_inserter(intersection));
+    modifiers = std::move(intersection);
+  }
+
+  return modifiers;
+}
+
 bool HardwareDisplayController::SetCursor(
     const scoped_refptr<ScanoutBuffer>& buffer) {
   bool status = true;