sm6150-common: livedisplay: Add anti flicker support

Change-Id: Ieb91a3efe0fc124e120f95f5ec197aa3c5cecb14

livedisplay/Android.bp

@@ -20,6 +20,7 @@ cc_binary {
     init_rc: ["vendor.lineage.livedisplay@2.0-service.xiaomi_sm6150.rc"],
     relative_install_path: "hw",
     srcs: [
+        "AntiFlicker.cpp",
         "SunlightEnhancement.cpp",
         "service.cpp",
     ],

livedisplay/AntiFlicker.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "AntiFlickerService"
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+
+#include "AntiFlicker.h"
+
+namespace vendor {
+namespace lineage {
+namespace livedisplay {
+namespace V2_0 {
+namespace implementation {
+
+static constexpr const char* kAntiFlickerStatusPath =
+        "/sys/devices/platform/soc/soc:qcom,dsi-display/msm_fb_ea_enable";
+
+Return<bool> AntiFlicker::isEnabled() {
+    std::string buf;
+    if (!android::base::ReadFileToString(kAntiFlickerStatusPath, &buf)) {
+        LOG(ERROR) << "Failed to read " << kAntiFlickerStatusPath;
+        return false;
+    }
+    return std::stoi(android::base::Trim(buf)) == 1;
+}
+
+Return<bool> AntiFlicker::setEnabled(bool enabled) {
+    if (!android::base::WriteStringToFile((enabled ? "1" : "0"), kAntiFlickerStatusPath)) {
+        LOG(ERROR) << "Failed to write " << kAntiFlickerStatusPath;
+        return false;
+    }
+    return true;
+}
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace livedisplay
+}  // namespace lineage
+}  // namespace vendor

livedisplay/AntiFlicker.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef VENDOR_LINEAGE_LIVEDISPLAY_V2_0_ANTIFLICKER_H
+#define VENDOR_LINEAGE_LIVEDISPLAY_V2_0_ANTIFLICKER_H
+
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <vendor/lineage/livedisplay/2.0/IAntiFlicker.h>
+
+namespace vendor {
+namespace lineage {
+namespace livedisplay {
+namespace V2_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+class AntiFlicker : public IAntiFlicker {
+  public:
+    // Methods from ::vendor::lineage::livedisplay::V2_0::IAntiFlicker follow.
+    Return<bool> isEnabled() override;
+    Return<bool> setEnabled(bool enabled) override;
+};
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace livedisplay
+}  // namespace lineage
+}  // namespace vendor
+
+#endif  // VENDOR_LINEAGE_LIVEDISPLAY_V2_0_ANTIFLICKER_H

livedisplay/service.cpp

@@ -20,16 +20,24 @@
 #include <binder/ProcessState.h>
 #include <hidl/HidlTransportSupport.h>
 
+#include "AntiFlicker.h"
 #include "SunlightEnhancement.h"
 
+using ::vendor::lineage::livedisplay::V2_0::IAntiFlicker;
 using ::vendor::lineage::livedisplay::V2_0::ISunlightEnhancement;
+using ::vendor::lineage::livedisplay::V2_0::implementation::AntiFlicker;
 using ::vendor::lineage::livedisplay::V2_0::implementation::SunlightEnhancement;
 
 int main() {
+    android::sp<IAntiFlicker> antiFlicker = new AntiFlicker();
     android::sp<ISunlightEnhancement> sunlightEnhancement = new SunlightEnhancement();
 
     android::hardware::configureRpcThreadpool(1, true /*callerWillJoin*/);
 
+    if (antiFlicker->registerAsService() != android::OK) {
+        LOG(ERROR) << "Cannot register anti flicker HAL service.";
+        return 1;
+    }
     if (sunlightEnhancement->registerAsService() != android::OK) {
         LOG(ERROR) << "Cannot register sunlight enhancement HAL service.";
         return 1;

livedisplay/vendor.lineage.livedisplay@2.0-service.xiaomi_sm6150.rc

@@ -1,6 +1,9 @@
 on boot
     chown system system /sys/devices/platform/soc/soc:qcom,dsi-display/hbm
+    chown system system /sys/devices/platform/soc/soc:qcom,dsi-display/msm_fb_ea_enable
+
     chmod 0660 /sys/devices/platform/soc/soc:qcom,dsi-display/hbm
+    chmod 0660 /sys/devices/platform/soc/soc:qcom,dsi-display/msm_fb_ea_enable
 
 service vendor.livedisplay-hal-2-0 /vendor/bin/hw/vendor.lineage.livedisplay@2.0-service.xiaomi_sm6150
     class hal

livedisplay/vendor.lineage.livedisplay@2.0-service.xiaomi_sm6150.xml

@@ -3,6 +3,10 @@
         <name>vendor.lineage.livedisplay</name>
         <transport>hwbinder</transport>
         <version>2.0</version>
+        <interface>
+            <name>IAntiFlicker</name>
+            <instance>default</instance>
+        </interface>
         <interface>
             <name>IPictureAdjustment</name>
             <instance>default</instance>

sepolicy/vendor/file_contexts

@@ -4,6 +4,7 @@
 # Display
 /sys/devices/platform/soc/[a-f0-9]+.qcom,mdss_mdp/drm/card([0-3])+/card([0-3])+-DSI-1/panel_info u:object_r:vendor_sysfs_graphics:s0
 /sys/devices/platform/soc/soc:qcom,dsi-display/hbm                   u:object_r:sysfs_hbm:s0
+/sys/devices/platform/soc/soc:qcom,dsi-display/msm_fb_ea_enable      u:object_r:sysfs_anti_flicker:s0
 
 # Fingerprint
 /dev/goodix_fp                                                       u:object_r:fingerprint_device:s0

sepolicy/vendor/hal_lineage_livedisplay_qti.te

@@ -1,3 +1,5 @@
+type sysfs_anti_flicker, sysfs_type, fs_type;
 type sysfs_hbm, sysfs_type, fs_type;
 
+allow hal_lineage_livedisplay_qti sysfs_anti_flicker:file rw_file_perms;
 allow hal_lineage_livedisplay_qti sysfs_hbm:file rw_file_perms;