diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/AidlCasPluginDescriptor.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/AidlCasPluginDescriptor.aidl
index 7b8099f..89d8625 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/AidlCasPluginDescriptor.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/AidlCasPluginDescriptor.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 parcelable AidlCasPluginDescriptor {
   int caSystemId;
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/DestinationBuffer.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/DestinationBuffer.aidl
index dd355af..b69cc33 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/DestinationBuffer.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/DestinationBuffer.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 union DestinationBuffer {
   android.hardware.cas.SharedBuffer nonsecureMemory;
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICas.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICas.aidl
index e169beb..28c9eb0 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICas.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICas.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 interface ICas {
   void closeSession(in byte[] sessionId);
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICasListener.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICasListener.aidl
index ebc13ce..db75062 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICasListener.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ICasListener.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 interface ICasListener {
   void onEvent(in int event, in int arg, in byte[] data);
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IDescrambler.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IDescrambler.aidl
index 9bf7903..411891b 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IDescrambler.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IDescrambler.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 interface IDescrambler {
   int descramble(in android.hardware.cas.ScramblingControl scramblingControl, in android.hardware.cas.SubSample[] subSamples, in android.hardware.cas.SharedBuffer srcBuffer, in long srcOffset, in android.hardware.cas.DestinationBuffer dstBuffer, in long dstOffset);
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IMediaCasService.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IMediaCasService.aidl
index f5c8018..1f945a7 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IMediaCasService.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/IMediaCasService.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 interface IMediaCasService {
   android.hardware.cas.IDescrambler createDescrambler(in int CA_system_id);
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SharedBuffer.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SharedBuffer.aidl
index a18aa57..9200b1d 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SharedBuffer.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SharedBuffer.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 parcelable SharedBuffer {
   android.hardware.common.Ashmem heapBase;
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/Status.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/Status.aidl
index 3d3a8a0..343c810 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/Status.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/Status.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 parcelable Status {
   const int OK = 0;
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/StatusEvent.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/StatusEvent.aidl
index 178cabc..165c0d4 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/StatusEvent.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/StatusEvent.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @Backing(type="byte") @VintfStability
 enum StatusEvent {
   PLUGIN_PHYSICAL_MODULE_CHANGED = 0,
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SubSample.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SubSample.aidl
index d9ee3b4..5bd1a1e 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SubSample.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SubSample.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @VintfStability
 parcelable SubSample {
   int numBytesOfClearData;
diff --git a/cas/aidl/android/hardware/cas/AidlCasPluginDescriptor.aidl b/cas/aidl/android/hardware/cas/AidlCasPluginDescriptor.aidl
index 55b328a..1dc7ac6 100644
--- a/cas/aidl/android/hardware/cas/AidlCasPluginDescriptor.aidl
+++ b/cas/aidl/android/hardware/cas/AidlCasPluginDescriptor.aidl
@@ -18,6 +18,7 @@
 
 /**
  * Describes a CAS plugin with its system ID and name.
+ * @hide
  */
 @VintfStability
 parcelable AidlCasPluginDescriptor {
diff --git a/cas/aidl/android/hardware/cas/DestinationBuffer.aidl b/cas/aidl/android/hardware/cas/DestinationBuffer.aidl
index 068f29d..74336c2 100644
--- a/cas/aidl/android/hardware/cas/DestinationBuffer.aidl
+++ b/cas/aidl/android/hardware/cas/DestinationBuffer.aidl
@@ -19,6 +19,9 @@
 import android.hardware.cas.SharedBuffer;
 import android.hardware.common.NativeHandle;
 
+/**
+ * @hide
+ */
 @VintfStability
 union DestinationBuffer {
     /**
diff --git a/cas/aidl/android/hardware/cas/ICas.aidl b/cas/aidl/android/hardware/cas/ICas.aidl
index 4c938c7..e6494ae 100644
--- a/cas/aidl/android/hardware/cas/ICas.aidl
+++ b/cas/aidl/android/hardware/cas/ICas.aidl
@@ -23,6 +23,7 @@
  * ICas is the API to control the CAS. It is used to manage sessions, provision/refresh the cas
  * system, and process the EMM/ECM messages. It also allows bi-directional, scheme-specific
  * communications between the client and the cas system.
+ * @hide
  */
 @VintfStability
 interface ICas {
diff --git a/cas/aidl/android/hardware/cas/ICasListener.aidl b/cas/aidl/android/hardware/cas/ICasListener.aidl
index 32d843f..21cd257 100644
--- a/cas/aidl/android/hardware/cas/ICasListener.aidl
+++ b/cas/aidl/android/hardware/cas/ICasListener.aidl
@@ -18,6 +18,9 @@
 
 import android.hardware.cas.StatusEvent;
 
+/**
+ * @hide
+ */
 @VintfStability
 interface ICasListener {
     /**
diff --git a/cas/aidl/android/hardware/cas/IDescrambler.aidl b/cas/aidl/android/hardware/cas/IDescrambler.aidl
index 33fbe75..0ac995c 100644
--- a/cas/aidl/android/hardware/cas/IDescrambler.aidl
+++ b/cas/aidl/android/hardware/cas/IDescrambler.aidl
@@ -23,6 +23,7 @@
 
 /**
  * IDescrambler is the API to control the descrambling operations.
+ * @hide
  */
 @VintfStability
 interface IDescrambler {
diff --git a/cas/aidl/android/hardware/cas/IMediaCasService.aidl b/cas/aidl/android/hardware/cas/IMediaCasService.aidl
index 8bc31f6..641c4a9 100644
--- a/cas/aidl/android/hardware/cas/IMediaCasService.aidl
+++ b/cas/aidl/android/hardware/cas/IMediaCasService.aidl
@@ -26,6 +26,7 @@
  * cas HAL to create cas and descrambler plugin instances. A cas plugin instance
  * opens cas sessions which are used to obtain keys for a descrambler session,
  * which can in turn be used to descramble protected video content.
+ * @hide
  */
 @VintfStability
 interface IMediaCasService {
diff --git a/cas/aidl/android/hardware/cas/SharedBuffer.aidl b/cas/aidl/android/hardware/cas/SharedBuffer.aidl
index 8a94ff7..0c89cfe 100644
--- a/cas/aidl/android/hardware/cas/SharedBuffer.aidl
+++ b/cas/aidl/android/hardware/cas/SharedBuffer.aidl
@@ -22,6 +22,7 @@
  * SharedBuffer describes a shared buffer which is defined by a heapBase, an
  * offset and a size. The offset is relative to the shared memory base for the
  * memory region identified by heapBase.
+ * @hide
  */
 @VintfStability
 parcelable SharedBuffer {
diff --git a/cas/aidl/android/hardware/cas/Status.aidl b/cas/aidl/android/hardware/cas/Status.aidl
index b2be34b..e7ae8ff 100644
--- a/cas/aidl/android/hardware/cas/Status.aidl
+++ b/cas/aidl/android/hardware/cas/Status.aidl
@@ -16,6 +16,9 @@
 
 package android.hardware.cas;
 
+/**
+ * @hide
+ */
 @VintfStability
 parcelable Status {
     /**
diff --git a/cas/aidl/android/hardware/cas/StatusEvent.aidl b/cas/aidl/android/hardware/cas/StatusEvent.aidl
index 0f62634..1fe732e 100644
--- a/cas/aidl/android/hardware/cas/StatusEvent.aidl
+++ b/cas/aidl/android/hardware/cas/StatusEvent.aidl
@@ -18,6 +18,7 @@
 
 /**
  * The Event Type for status change.
+ * @hide
  */
 @VintfStability
 @Backing(type="byte")
diff --git a/cas/aidl/android/hardware/cas/SubSample.aidl b/cas/aidl/android/hardware/cas/SubSample.aidl
index c1353cb..8e1ff77 100644
--- a/cas/aidl/android/hardware/cas/SubSample.aidl
+++ b/cas/aidl/android/hardware/cas/SubSample.aidl
@@ -19,6 +19,7 @@
 /**
  * A subsample consists of some number of bytes of clear (unscrambled)
  * data followed by a number of bytes of scrambled data.
+ * @hide
  */
 @VintfStability
 parcelable SubSample {