diff --git a/hidl/livedisplay/Android.bp b/hidl/livedisplay/Android.bp
index 3fe7bd3..6cbba68 100644
--- a/hidl/livedisplay/Android.bp
+++ b/hidl/livedisplay/Android.bp
@@ -49,6 +49,7 @@ cc_binary {
         "vendor.lineage.livedisplay@2.1",
     ],
     header_libs: [
+        "kernel_headers.oplus",
         "vendor.lineage.livedisplay@2.0-sdm-headers",
         "vendor.lineage.livedisplay@2.1-oplus-headers",
     ],
diff --git a/hidl/livedisplay/AntiFlicker.cpp b/hidl/livedisplay/AntiFlicker.cpp
index 9a94f61..ed84413 100644
--- a/hidl/livedisplay/AntiFlicker.cpp
+++ b/hidl/livedisplay/AntiFlicker.cpp
@@ -14,21 +14,9 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "AntiFlickerService"
-
-#include <android-base/file.h>
-#include <android-base/strings.h>
+#include <fcntl.h>
 #include <livedisplay/oplus/AntiFlicker.h>
-
-using ::android::base::ReadFileToString;
-using ::android::base::Trim;
-using ::android::base::WriteStringToFile;
-
-namespace {
-
-constexpr const char* kDcDimmingPath = "/sys/kernel/oplus_display/dimlayer_bl_en";
-
-}  // anonymous namespace
+#include <oplus/oplus_display_panel.h>
 
 namespace vendor {
 namespace lineage {
@@ -36,19 +24,16 @@ namespace livedisplay {
 namespace V2_1 {
 namespace implementation {
 
+AntiFlicker::AntiFlicker() : mOplusDisplayFd(open("/dev/oplus_display", O_RDWR)) {}
+
 Return<bool> AntiFlicker::isEnabled() {
-    std::string tmp;
-    int32_t contents = 0;
-
-    if (ReadFileToString(kDcDimmingPath, &tmp)) {
-        contents = std::stoi(Trim(tmp));
-    }
-
-    return contents > 0;
+    unsigned int value;
+    return ioctl(mOplusDisplayFd, PANEL_IOCTL_GET_DIMLAYER_BL_EN, &value) == 0 && value > 0;
 }
 
 Return<bool> AntiFlicker::setEnabled(bool enabled) {
-    return WriteStringToFile(std::to_string(enabled), kDcDimmingPath, true);
+    unsigned int value = enabled;
+    return ioctl(mOplusDisplayFd, PANEL_IOCTL_SET_DIMLAYER_BL_EN, &value) == 0;
 }
 
 }  // namespace implementation
diff --git a/hidl/livedisplay/SunlightEnhancement.cpp b/hidl/livedisplay/SunlightEnhancement.cpp
index 36fa67e..d4c6942 100644
--- a/hidl/livedisplay/SunlightEnhancement.cpp
+++ b/hidl/livedisplay/SunlightEnhancement.cpp
@@ -14,19 +14,9 @@
  * limitations under the License.
  */
 
-#include <android-base/file.h>
-#include <android-base/strings.h>
+#include <fcntl.h>
 #include <livedisplay/oplus/SunlightEnhancement.h>
-
-using ::android::base::ReadFileToString;
-using ::android::base::Trim;
-using ::android::base::WriteStringToFile;
-
-namespace {
-
-constexpr const char* kHbmPath = "/sys/kernel/oplus_display/hbm";
-
-}  // anonymous namespace
+#include <oplus/oplus_display_panel.h>
 
 namespace vendor {
 namespace lineage {
@@ -34,19 +24,16 @@ namespace livedisplay {
 namespace V2_1 {
 namespace implementation {
 
+SunlightEnhancement::SunlightEnhancement() : mOplusDisplayFd(open("/dev/oplus_display", O_RDWR)) {}
+
 Return<bool> SunlightEnhancement::isEnabled() {
-    std::string tmp;
-    int32_t contents = 0;
-
-    if (ReadFileToString(kHbmPath, &tmp)) {
-        contents = std::stoi(Trim(tmp));
-    }
-
-    return contents > 0;
+    unsigned int value;
+    return ioctl(mOplusDisplayFd, PANEL_IOCTL_GET_HBM, &value) == 0 && value > 0;
 }
 
 Return<bool> SunlightEnhancement::setEnabled(bool enabled) {
-    return WriteStringToFile(std::to_string(enabled), kHbmPath, true);
+    unsigned int value = enabled;
+    return ioctl(mOplusDisplayFd, PANEL_IOCTL_SET_HBM, &value) == 0;
 }
 
 }  // namespace implementation
diff --git a/hidl/livedisplay/include/livedisplay/oplus/AntiFlicker.h b/hidl/livedisplay/include/livedisplay/oplus/AntiFlicker.h
index 1cc5e66..7ae910e 100644
--- a/hidl/livedisplay/include/livedisplay/oplus/AntiFlicker.h
+++ b/hidl/livedisplay/include/livedisplay/oplus/AntiFlicker.h
@@ -32,9 +32,14 @@ using ::android::hardware::Void;
 
 class AntiFlicker : public IAntiFlicker {
   public:
+    AntiFlicker();
+
     // Methods from ::vendor::lineage::livedisplay::V2_1::IAntiFlicker follow.
     Return<bool> isEnabled() override;
     Return<bool> setEnabled(bool enabled) override;
+
+  private:
+    int mOplusDisplayFd;
 };
 
 }  // namespace implementation
diff --git a/hidl/livedisplay/include/livedisplay/oplus/SunlightEnhancement.h b/hidl/livedisplay/include/livedisplay/oplus/SunlightEnhancement.h
index 5076b7b..6cbc0f8 100644
--- a/hidl/livedisplay/include/livedisplay/oplus/SunlightEnhancement.h
+++ b/hidl/livedisplay/include/livedisplay/oplus/SunlightEnhancement.h
@@ -32,9 +32,14 @@ using ::android::hardware::Void;
 
 class SunlightEnhancement : public ISunlightEnhancement {
   public:
+    SunlightEnhancement();
+
     // Methods from ::vendor::lineage::livedisplay::V2_0::ISunlightEnhancement follow.
     Return<bool> isEnabled() override;
     Return<bool> setEnabled(bool enabled) override;
+
+  private:
+    int mOplusDisplayFd;
 };
 
 }  // namespace implementation
diff --git a/kernel-headers/include/oplus/oplus_display_panel.h b/kernel-headers/include/oplus/oplus_display_panel.h
index 7e3b204..3f26f18 100644
--- a/kernel-headers/include/oplus/oplus_display_panel.h
+++ b/kernel-headers/include/oplus/oplus_display_panel.h
@@ -20,5 +20,9 @@
 
 #define OPLUS_PANEL_IOCTL_BASE 'o'
 
+#define PANEL_IOCTL_SET_HBM _IOW(OPLUS_PANEL_IOCTL_BASE, 0x0F, unsigned int)
+#define PANEL_IOCTL_GET_HBM _IOWR(OPLUS_PANEL_IOCTL_BASE, 0x10, unsigned int)
 #define PANEL_IOCTL_SET_DIMLAYER_HBM _IOW(OPLUS_PANEL_IOCTL_BASE, 0x1F, unsigned int)
+#define PANEL_IOCTL_SET_DIMLAYER_BL_EN _IOW(OPLUS_PANEL_IOCTL_BASE, 0x21, unsigned int)
+#define PANEL_IOCTL_GET_DIMLAYER_BL_EN _IOWR(OPLUS_PANEL_IOCTL_BASE, 0x22, unsigned int)
 #define PANEL_IOCTL_SET_FP_PRESS _IOW(OPLUS_PANEL_IOCTL_BASE, 0x29, unsigned int)
diff --git a/sepolicy/qti/vendor/hal_lineage_livedisplay_qti.te b/sepolicy/qti/vendor/hal_lineage_livedisplay_qti.te
index 25e83e8..9e5bebb 100644
--- a/sepolicy/qti/vendor/hal_lineage_livedisplay_qti.te
+++ b/sepolicy/qti/vendor/hal_lineage_livedisplay_qti.te
@@ -1 +1 @@
-rw_dir_file(hal_lineage_livedisplay_qti, vendor_sysfs_graphics)
+allow hal_lineage_livedisplay_qti graphics_device:chr_file rw_file_perms;