diff --git a/services/tuner/TunerService.cpp b/services/tuner/TunerService.cpp
index 335578d..4833aaf 100644
--- a/services/tuner/TunerService.cpp
+++ b/services/tuner/TunerService.cpp
@@ -270,6 +270,28 @@
     return mTuner->setLna(bEnable);
 }
 
+::ndk::ScopedAStatus TunerService::setMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                           int32_t in_maxNumber) {
+    if (!hasITuner()) {
+        ALOGD("get ITuner failed");
+        return ::ndk::ScopedAStatus::fromServiceSpecificError(
+                static_cast<int32_t>(Result::UNAVAILABLE));
+    }
+
+    return mTuner->setMaxNumberOfFrontends(in_frontendType, in_maxNumber);
+}
+
+::ndk::ScopedAStatus TunerService::getMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                           int32_t* _aidl_return) {
+    if (!hasITuner()) {
+        ALOGD("get ITuner failed");
+        return ::ndk::ScopedAStatus::fromServiceSpecificError(
+                static_cast<int32_t>(Result::UNAVAILABLE));
+    }
+
+    return mTuner->getMaxNumberOfFrontends(in_frontendType, _aidl_return);
+}
+
 string TunerService::addFilterToShared(const shared_ptr<TunerFilter>& sharedFilter) {
     Mutex::Autolock _l(mSharedFiltersLock);
 
diff --git a/services/tuner/TunerService.h b/services/tuner/TunerService.h
index f144744..7fc2aa4 100644
--- a/services/tuner/TunerService.h
+++ b/services/tuner/TunerService.h
@@ -33,6 +33,7 @@
 using ::aidl::android::hardware::tv::tuner::DemuxFilterEvent;
 using ::aidl::android::hardware::tv::tuner::DemuxFilterStatus;
 using ::aidl::android::hardware::tv::tuner::FrontendInfo;
+using ::aidl::android::hardware::tv::tuner::FrontendType;
 using ::aidl::android::hardware::tv::tuner::ITuner;
 using ::aidl::android::media::tv::tuner::BnTunerService;
 using ::aidl::android::media::tv::tuner::ITunerDemux;
@@ -77,6 +78,10 @@
                                           const shared_ptr<ITunerFilterCallback>& in_cb,
                                           shared_ptr<ITunerFilter>* _aidl_return) override;
     ::ndk::ScopedAStatus setLna(bool in_bEnable) override;
+    ::ndk::ScopedAStatus setMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                 int32_t in_maxNumber) override;
+    ::ndk::ScopedAStatus getMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                 int32_t* _aidl_return) override;
 
     string addFilterToShared(const shared_ptr<TunerFilter>& sharedFilter);
     void removeSharedFilter(const shared_ptr<TunerFilter>& sharedFilter);
diff --git a/services/tuner/aidl/android/media/tv/tuner/ITunerService.aidl b/services/tuner/aidl/android/media/tv/tuner/ITunerService.aidl
index 248077b..b8084ab 100644
--- a/services/tuner/aidl/android/media/tv/tuner/ITunerService.aidl
+++ b/services/tuner/aidl/android/media/tv/tuner/ITunerService.aidl
@@ -18,6 +18,7 @@
 
 import android.hardware.tv.tuner.DemuxCapabilities;
 import android.hardware.tv.tuner.FrontendInfo;
+import android.hardware.tv.tuner.FrontendType;
 import android.media.tv.tuner.ITunerDemux;
 import android.media.tv.tuner.ITunerDescrambler;
 import android.media.tv.tuner.ITunerFilter;
@@ -111,4 +112,22 @@
      * @param bEnable enable Lna or not.
      */
     void setLna(in boolean bEnable);
+
+    /**
+     * Set the maximum usable frontends number of a given frontend type. It's used by client
+     * to enable or disable frontends when cable connection status is changed by user.
+     *
+     * @param frontendType the frontend type which the maximum usable number will be set.
+     * @param maxNumber the new maximum usable number.
+     */
+    void setMaxNumberOfFrontends(in FrontendType frontendType, in int maxNumber);
+
+    /**
+     * Get the maximum usable frontends number of a given frontend type.
+     *
+     * @param frontendType the frontend type which the maximum usable number will be queried.
+     *
+     * @return the maximum usable number of the queried frontend type.
+     */
+    int getMaxNumberOfFrontends(in FrontendType frontendType);
 }
diff --git a/services/tuner/hidl/TunerHidlService.cpp b/services/tuner/hidl/TunerHidlService.cpp
index f4aa61a..6f55f1e 100644
--- a/services/tuner/hidl/TunerHidlService.cpp
+++ b/services/tuner/hidl/TunerHidlService.cpp
@@ -387,6 +387,19 @@
     return ::ndk::ScopedAStatus::ok();
 }
 
+::ndk::ScopedAStatus TunerHidlService::setMaxNumberOfFrontends(FrontendType /* in_frontendType */,
+                                                               int32_t /* in_maxNumber */) {
+    return ::ndk::ScopedAStatus::fromServiceSpecificError(
+            static_cast<int32_t>(Result::UNAVAILABLE));
+}
+
+::ndk::ScopedAStatus TunerHidlService::getMaxNumberOfFrontends(FrontendType /* in_frontendType */,
+                                                               int32_t* _aidl_return) {
+    *_aidl_return = -1;
+    return ::ndk::ScopedAStatus::fromServiceSpecificError(
+            static_cast<int32_t>(Result::UNAVAILABLE));
+}
+
 string TunerHidlService::addFilterToShared(const shared_ptr<TunerHidlFilter>& sharedFilter) {
     Mutex::Autolock _l(mSharedFiltersLock);
 
diff --git a/services/tuner/hidl/TunerHidlService.h b/services/tuner/hidl/TunerHidlService.h
index 4cff7cf..2252d35 100644
--- a/services/tuner/hidl/TunerHidlService.h
+++ b/services/tuner/hidl/TunerHidlService.h
@@ -34,6 +34,7 @@
 using ::aidl::android::hardware::tv::tuner::DemuxFilterEvent;
 using ::aidl::android::hardware::tv::tuner::DemuxFilterStatus;
 using ::aidl::android::hardware::tv::tuner::FrontendInfo;
+using ::aidl::android::hardware::tv::tuner::FrontendType;
 using ::aidl::android::media::tv::tuner::ITunerDemux;
 using ::aidl::android::media::tv::tuner::ITunerDescrambler;
 using ::aidl::android::media::tv::tuner::ITunerFrontend;
@@ -89,6 +90,10 @@
                                           const shared_ptr<ITunerFilterCallback>& in_cb,
                                           shared_ptr<ITunerFilter>* _aidl_return) override;
     ::ndk::ScopedAStatus setLna(bool in_bEnable) override;
+    ::ndk::ScopedAStatus setMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                 int32_t in_maxNumber) override;
+    ::ndk::ScopedAStatus getMaxNumberOfFrontends(FrontendType in_frontendType,
+                                                 int32_t* _aidl_return) override;
 
     string addFilterToShared(const shared_ptr<TunerHidlFilter>& sharedFilter);
     void removeSharedFilter(const shared_ptr<TunerHidlFilter>& sharedFilter);