livedisplay: Add IAdaptiveBacklight support

Change-Id: Id11b96f58efb494b05e089d9954139d0c01366be

README.md

@@ -4,6 +4,7 @@
 
 | Namespace | Variable | Description | Default |
 | --------- | -------- | ----------- | ------- |
+| OPLUS_LINEAGE_LIVEDISPLAY_HAL | ENABLE_AB | Enable AdaptiveBacklight feature | false |
 | OPLUS_LINEAGE_LIVEDISPLAY_HAL | ENABLE_AF | Enable AntiFlicker feature | false |
 | OPLUS_LINEAGE_LIVEDISPLAY_HAL | ENABLE_DM | Enable DisplayModes feature | false |
 | OPLUS_LINEAGE_LIVEDISPLAY_HAL | ENABLE_PA | Enable PictureAdjustment feature | true |

aidl/livedisplay/AdaptiveBacklight.cpp

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define LOG_TAG "AdaptiveBacklightService"
+
+#include <android-base/logging.h>
+#include <fcntl.h>
+#include <livedisplay/oplus/AdaptiveBacklight.h>
+#include <oplus/oplus_display_panel.h>
+
+namespace aidl {
+namespace vendor {
+namespace lineage {
+namespace livedisplay {
+
+AdaptiveBacklight::AdaptiveBacklight() : mOplusDisplayFd(open("/dev/oplus_display", O_RDWR)) {}
+
+ndk::ScopedAStatus AdaptiveBacklight::getEnabled(bool* _aidl_return) {
+    unsigned int value;
+    if (ioctl(mOplusDisplayFd, PANEL_IOCTL_GET_CABC_STATUS, &value) != 0) {
+        LOG(ERROR) << "Failed to read current AdaptiveBacklight state";
+        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    }
+    *_aidl_return = value > 0;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AdaptiveBacklight::setEnabled(bool enabled) {
+    bool isEnabled;
+    if (auto status = getEnabled(&isEnabled); !status.isOk()) {
+        return status;
+    }
+    unsigned int value = enabled;
+    if (isEnabled != enabled && ioctl(mOplusDisplayFd, PANEL_IOCTL_SET_CABC_STATUS, &value) != 0) {
+        LOG(ERROR) << "Failed to set AdaptiveBacklight state";
+        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    }
+    return ndk::ScopedAStatus::ok();
+}
+
+}  // namespace livedisplay
+}  // namespace lineage
+}  // namespace vendor
+}  // namespace aidl

aidl/livedisplay/Android.bp

@@ -3,6 +3,11 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
+filegroup {
+    name: "vendor.lineage.livedisplay-oplus-ab",
+    srcs: ["AdaptiveBacklight.cpp"],
+}
+
 filegroup {
     name: "vendor.lineage.livedisplay-oplus-af",
     srcs: ["AntiFlicker.cpp"],
@@ -27,7 +32,10 @@ cc_library_headers {
 cc_binary {
     name: "vendor.lineage.livedisplay-service.oplus",
     init_rc: ["vendor.lineage.livedisplay-service.oplus.rc"],
-    vintf_fragments: select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AF"), {
+    vintf_fragments: select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AB"), {
+        "true": ["vendor.lineage.livedisplay-service.oplus-ab.xml"],
+        default: [],
+    }) + select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AF"), {
         "true": ["vendor.lineage.livedisplay-service.oplus-af.xml"],
         default: [],
     }) + select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_DM"), {
@@ -44,6 +52,7 @@ cc_binary {
     srcs: [
         ":vendor.lineage.livedisplay-sdm-pa",
         ":vendor.lineage.livedisplay-sdm-utils",
+        ":vendor.lineage.livedisplay-oplus-ab",
         ":vendor.lineage.livedisplay-oplus-af",
         ":vendor.lineage.livedisplay-oplus-dm",
         ":vendor.lineage.livedisplay-oplus-se",
@@ -61,7 +70,10 @@ cc_binary {
         "vendor.lineage.livedisplay-sdm-headers",
         "vendor.lineage.livedisplay-oplus-headers",
     ],
-    cflags: select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AF"), {
+    cflags: select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AB"), {
+        "true": ["-DENABLE_AB=true"],
+        default: ["-DENABLE_AB=false"],
+    }) + select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_AF"), {
         "true": ["-DENABLE_AF=true"],
         default: ["-DENABLE_AF=false"],
     }) + select(soong_config_variable("OPLUS_LINEAGE_LIVEDISPLAY_HAL", "ENABLE_DM"), {

aidl/livedisplay/include/livedisplay/oplus/AdaptiveBacklight.h

@@ -0,0 +1,30 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <aidl/vendor/lineage/livedisplay/BnAdaptiveBacklight.h>
+
+namespace aidl {
+namespace vendor {
+namespace lineage {
+namespace livedisplay {
+
+class AdaptiveBacklight : public BnAdaptiveBacklight {
+  public:
+    AdaptiveBacklight();
+
+    // Methods from ::aidl::vendor::lineage::livedisplay::BnAdaptiveBacklight follow.
+    ndk::ScopedAStatus getEnabled(bool* _aidl_return) override;
+    ndk::ScopedAStatus setEnabled(bool enabled) override;
+
+  private:
+    int mOplusDisplayFd;
+};
+
+}  // namespace livedisplay
+}  // namespace lineage
+}  // namespace vendor
+}  // namespace aidl

aidl/livedisplay/service.cpp

@@ -9,11 +9,13 @@
 #include <android/binder_manager.h>
 #include <android/binder_process.h>
 #include <binder/ProcessState.h>
+#include <livedisplay/oplus/AdaptiveBacklight.h>
 #include <livedisplay/oplus/AntiFlicker.h>
 #include <livedisplay/oplus/DisplayModes.h>
 #include <livedisplay/oplus/SunlightEnhancement.h>
 #include <livedisplay/sdm/PictureAdjustment.h>
 
+using ::aidl::vendor::lineage::livedisplay::AdaptiveBacklight;
 using ::aidl::vendor::lineage::livedisplay::AntiFlicker;
 using ::aidl::vendor::lineage::livedisplay::DisplayModes;
 using ::aidl::vendor::lineage::livedisplay::SunlightEnhancement;
@@ -29,6 +31,8 @@ int main() {
     std::shared_ptr<SDMController> controller =
             ENABLE_DM || ENABLE_PA ? std::make_shared<SDMController>() : nullptr;
 
+    std::shared_ptr<AdaptiveBacklight> ab =
+            ENABLE_AB ? ndk::SharedRefBase::make<AdaptiveBacklight>() : nullptr;
     std::shared_ptr<AntiFlicker> af = ENABLE_AF ? ndk::SharedRefBase::make<AntiFlicker>() : nullptr;
     std::shared_ptr<DisplayModes> dm =
             ENABLE_DM ? ndk::SharedRefBase::make<DisplayModes>(controller) : nullptr;
@@ -37,6 +41,12 @@ int main() {
     std::shared_ptr<SunlightEnhancement> se =
             ENABLE_SE ? ndk::SharedRefBase::make<SunlightEnhancement>() : nullptr;
 
+    if (ab) {
+        std::string instance = std::string() + AdaptiveBacklight::descriptor + "/default";
+        binder_status_t status = AServiceManager_addService(ab->asBinder().get(), instance.c_str());
+        CHECK_EQ(status, STATUS_OK);
+    }
+
     if (af) {
         std::string instance = std::string() + AntiFlicker::descriptor + "/default";
         binder_status_t status = AServiceManager_addService(af->asBinder().get(), instance.c_str());

aidl/livedisplay/vendor.lineage.livedisplay-service.oplus-ab.xml

@@ -0,0 +1,10 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>vendor.lineage.livedisplay</name>
+        <version>1</version>
+        <interface>
+            <name>IAdaptiveBacklight</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+</manifest>