diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 89685bdce6b..0fef76f7370 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -2,13 +2,22 @@
 
 ### dev-v2 (not yet released) ###
 
+* DRM:
+  * Inject `DrmSessionManager` into the `MediaSources` instead of `Renderers`
+    ([#5619](https://github.com/google/ExoPlayer/issues/5619)).
+  * Add a `DefaultDrmSessionManager.Builder`.
+  * Add support for the use of secure decoders in clear sections of content
+    ([#4867](https://github.com/google/ExoPlayer/issues/4867)).
+  * Add basic DRM support to the Cast demo app.
+  * Add support for custom `LoadErrorHandlingPolicies` in key and provisioning
+    requests ([#6334](https://github.com/google/ExoPlayer/issues/6334)).
+  * Remove `DefaultDrmSessionManager` factory methods that leak `ExoMediaDrm`
+    instances ([#4721](https://github.com/google/ExoPlayer/issues/4721)).
 * Remove the `DataSpec.FLAG_ALLOW_ICY_METADATA` flag. Instead, set the header
   `IcyHeaders.REQUEST_HEADER_ENABLE_METADATA_NAME` in the `DataSpec`
   `httpRequestHeaders`.
 * DASH: Support negative @r values in segment timelines
   ([#1787](https://github.com/google/ExoPlayer/issues/1787)).
-* Remove `DefaultDrmSessionManager` factory methods that leak `ExoMediaDrm`
-  instances ([#4721](https://github.com/google/ExoPlayer/issues/4721)).
 * Add `allowedCapturePolicy` field to `AudioAttributes` wrapper to allow to
   opt-out of audio recording.
 * Add `DataSpec.httpRequestHeaders` to set HTTP request headers when connecting
@@ -24,7 +33,6 @@
   display by default.
 * Add `PlaybackStatsListener` to collect `PlaybackStats` for playbacks analysis
   and analytics reporting (TODO: link to developer guide page/blog post).
-* Add basic DRM support to the Cast demo app.
 * Assume that encrypted content requires secure decoders in renderer support
   checks ([#5568](https://github.com/google/ExoPlayer/issues/5568)).
 * Decoders: Prefer decoders that advertise format support over ones that do not,
@@ -50,8 +58,6 @@
   the `Player` set later using `AnalyticsCollector.setPlayer`.
 * Replace `ExoPlayerFactory` by `SimpleExoPlayer.Builder` and
   `ExoPlayer.Builder`.
-* Inject `DrmSessionManager` into the `MediaSources` instead of `Renderers`
-  ([#5619](https://github.com/google/ExoPlayer/issues/5619)).
 * Fix issue where player errors are thrown too early at playlist transitions
   ([#5407](https://github.com/google/ExoPlayer/issues/5407)).
 * Deprecate `setTag` parameter of `Timeline.getWindow`. Tags will always be set.
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
index 92cb5d7b8bd..e8a6fe65723 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
@@ -39,6 +39,7 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
 /** A {@link DrmSessionManager} that supports playbacks using {@link ExoMediaDrm}. */
@@ -46,6 +47,148 @@
 public class DefaultDrmSessionManager<T extends ExoMediaCrypto>
     implements DrmSessionManager<T>, ProvisioningManager<T> {
 
+  /**
+   * Builder for {@link DefaultDrmSessionManager} instances.
+   *
+   * <p>See {@link #Builder} for the list of default values.
+   */
+  public static final class Builder {
+
+    private final HashMap<String, String> keyRequestParameters;
+    private UUID uuid;
+    private ExoMediaDrm.Provider<ExoMediaCrypto> exoMediaDrmProvider;
+    private boolean multiSession;
+    private boolean allowPlaceholderSessions;
+    @Flags private int flags;
+    private LoadErrorHandlingPolicy loadErrorHandlingPolicy;
+
+    /**
+     * Creates a builder with default values.
+     *
+     * <ul>
+     *   <li>{@link #setKeyRequestParameters keyRequestParameters}: An empty map.
+     *   <li>{@link #setUuidAndExoMediaDrmProvider UUID}: {@link C#WIDEVINE_UUID}.
+     *   <li>{@link #setUuidAndExoMediaDrmProvider ExoMediaDrm.Provider}: {@link
+     *       FrameworkMediaDrm#DEFAULT_PROVIDER}.
+     *   <li>{@link #setMultiSession multiSession}: Not allowed by default.
+     *   <li>{@link #setAllowPlaceholderSessions allowPlaceholderSession}: Not allowed by default.
+     *   <li>{@link #setPlayClearSamplesWithoutKeys playClearSamplesWithoutKeys}: Not allowed by
+     *       default.
+     *   <li>{@link #setLoadErrorHandlingPolicy LoadErrorHandlingPolicy}: {@link
+     *       DefaultLoadErrorHandlingPolicy}.
+     * </ul>
+     */
+    @SuppressWarnings("unchecked")
+    public Builder() {
+      keyRequestParameters = new HashMap<>();
+      uuid = C.WIDEVINE_UUID;
+      exoMediaDrmProvider = (ExoMediaDrm.Provider) FrameworkMediaDrm.DEFAULT_PROVIDER;
+      multiSession = false;
+      allowPlaceholderSessions = false;
+      flags = 0;
+      loadErrorHandlingPolicy = new DefaultLoadErrorHandlingPolicy();
+    }
+
+    /**
+     * Sets the parameters to pass to {@link ExoMediaDrm#getKeyRequest(byte[], List, int, HashMap)}.
+     *
+     * @param keyRequestParameters A map with parameters.
+     * @return This builder.
+     */
+    public Builder setKeyRequestParameters(Map<String, String> keyRequestParameters) {
+      this.keyRequestParameters.clear();
+      this.keyRequestParameters.putAll(Assertions.checkNotNull(keyRequestParameters));
+      return this;
+    }
+
+    /**
+     * Sets the UUID of the DRM scheme and the {@link ExoMediaDrm.Provider} to use.
+     *
+     * @param uuid The UUID of the DRM scheme.
+     * @param exoMediaDrmProvider The {@link ExoMediaDrm.Provider}.
+     * @return This builder.
+     */
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    public Builder setUuidAndExoMediaDrmProvider(
+        UUID uuid, ExoMediaDrm.Provider exoMediaDrmProvider) {
+      this.uuid = Assertions.checkNotNull(uuid);
+      this.exoMediaDrmProvider = Assertions.checkNotNull(exoMediaDrmProvider);
+      return this;
+    }
+
+    /**
+     * Sets whether this session manager is allowed to acquire multiple simultaneous sessions.
+     *
+     * <p>Users should pass false when a single key request will obtain all keys required to decrypt
+     * the associated content. {@code multiSession} is required when content uses key rotation.
+     *
+     * @param multiSession Whether this session manager is allowed to acquire multiple simultaneous
+     *     sessions.
+     * @return This builder.
+     */
+    public Builder setMultiSession(boolean multiSession) {
+      this.multiSession = multiSession;
+      return this;
+    }
+
+    /**
+     * Sets whether this session manager is allowed to acquire placeholder sessions.
+     *
+     * <p>Placeholder sessions allow the use of secure renderers to play clear content.
+     *
+     * @param allowPlaceholderSessions Whether this session manager is allowed to acquire
+     *     placeholder sessions.
+     * @return This builder.
+     */
+    public Builder setAllowPlaceholderSessions(boolean allowPlaceholderSessions) {
+      this.allowPlaceholderSessions = allowPlaceholderSessions;
+      return this;
+    }
+
+    /**
+     * Sets whether clear samples should be played when keys are not available. Keys are considered
+     * unavailable when the load request is taking place, or when the key request has failed.
+     *
+     * <p>This option does not affect placeholder sessions.
+     *
+     * @param playClearSamplesWithoutKeys Whether clear samples should be played when keys are not
+     *     available.
+     * @return This builder.
+     */
+    public Builder setPlayClearSamplesWithoutKeys(boolean playClearSamplesWithoutKeys) {
+      if (playClearSamplesWithoutKeys) {
+        this.flags |= FLAG_PLAY_CLEAR_SAMPLES_WITHOUT_KEYS;
+      } else {
+        this.flags &= ~FLAG_PLAY_CLEAR_SAMPLES_WITHOUT_KEYS;
+      }
+      return this;
+    }
+
+    /**
+     * Sets the {@link LoadErrorHandlingPolicy} for key and provisioning requests.
+     *
+     * @param loadErrorHandlingPolicy A {@link LoadErrorHandlingPolicy}.
+     * @return This builder.
+     */
+    public Builder setLoadErrorHandlingPolicy(LoadErrorHandlingPolicy loadErrorHandlingPolicy) {
+      this.loadErrorHandlingPolicy = Assertions.checkNotNull(loadErrorHandlingPolicy);
+      return this;
+    }
+
+    /** Builds a {@link DefaultDrmSessionManager} instance. */
+    public DefaultDrmSessionManager<ExoMediaCrypto> build(MediaDrmCallback mediaDrmCallback) {
+      return new DefaultDrmSessionManager<>(
+          uuid,
+          exoMediaDrmProvider,
+          mediaDrmCallback,
+          keyRequestParameters,
+          multiSession,
+          allowPlaceholderSessions,
+          flags,
+          loadErrorHandlingPolicy);
+    }
+  }
+
   /**
    * Signals that the {@link DrmInitData} passed to {@link #acquireSession} does not contain does
    * not contain scheme data for the required UUID.
@@ -200,7 +343,6 @@ private DefaultDrmSessionManager(
     this.optionalKeyRequestParameters = optionalKeyRequestParameters;
     this.eventDispatcher = new EventDispatcher<>();
     this.multiSession = multiSession;
-    // TODO: Allow customization once this class has a Builder.
     this.allowPlaceholderSessions = allowPlaceholderSessions;
     this.flags = flags;
     this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;