diff --git a/aosp_diff/preliminary/external/drm_hwcomposer/0006-Fix-regression.patch b/aosp_diff/preliminary/external/drm_hwcomposer/0006-Fix-regression.patch
new file mode 100644
index 0000000000..2137cfe64b
--- /dev/null
+++ b/aosp_diff/preliminary/external/drm_hwcomposer/0006-Fix-regression.patch
@@ -0,0 +1,56 @@
+From 05d04dffb4c1aa0b96491a6ecf30c3a5a8546373 Mon Sep 17 00:00:00 2001
+From: "Li, HaihongX" <haihongx.li@intel.com>
+Date: Fri, 29 Oct 2021 10:27:18 +0800
+Subject: [PATCH] Fix regression
+
+Set 3rd parameter of vsync2.4 callback with vsync period value.
+Visit https://www.testufo.com/ for testing.
+
+Tracked-On: OAM-99923
+Signed-off-by: Li, HaihongX <haihongx.li@intel.com>
+---
+ DrmHwcTwo.cpp       |  2 +-
+ drm/VSyncWorker.cpp | 13 ++++++++++++-
+ 2 files changed, 13 insertions(+), 2 deletions(-)
+
+diff --git a/DrmHwcTwo.cpp b/DrmHwcTwo.cpp
+index 194b11e..b3b5503 100644
+--- a/DrmHwcTwo.cpp
++++ b/DrmHwcTwo.cpp
+@@ -924,7 +924,7 @@ HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayVsyncPeriod(
+   if (mode.id() == 0)
+     return HWC2::Error::BadConfig;
+ 
+-  *outVsyncPeriod = 1E9 / mode.v_refresh();
++  *outVsyncPeriod = 1000.0 * 1000.0 * 1000.0 / mode.v_refresh();
+   return HWC2::Error::None;
+ }
+ 
+diff --git a/drm/VSyncWorker.cpp b/drm/VSyncWorker.cpp
+index b7ceb4c..acf4988 100644
+--- a/drm/VSyncWorker.cpp
++++ b/drm/VSyncWorker.cpp
+@@ -181,8 +181,19 @@ void VSyncWorker::Routine() {
+   if (enabled_ && vsync_callback_hook_ && vsync_callback_data_)
+     vsync_callback_hook_(vsync_callback_data_, display, timestamp);
+   
++  uint32_t vsyncPeriodNanos = 1000.0 * 1000.0 * 1000.0 / 60.0F;  // Default to 60Hz refresh rate
++  if (last_timestamp_ == -1) {
++    DrmConnector *  connector = drm_->GetConnectorForDisplay(display_);
++    if (connector != nullptr) {
++      DrmMode const &mode = connector ->active_mode();
++      if (mode.id() != 0)
++        vsyncPeriodNanos = 1000.0 * 1000.0 * 1000.0 / mode.v_refresh();
++    }
++  } else {
++    vsyncPeriodNanos = timestamp - last_timestamp_;
++  }
+   if (enabled_ && vsync_2_4_callback_hook_ && vsync_2_4_callback_data_)
+-    vsync_2_4_callback_hook_(vsync_2_4_callback_data_, display, timestamp, 0);
++    vsync_2_4_callback_hook_(vsync_2_4_callback_data_, display, timestamp, vsyncPeriodNanos);
+   Unlock();
+ 
+   last_timestamp_ = timestamp;
+-- 
+2.32.0
+