sm7125: Switch to aidl light service

aidl/light/Android.bp

@@ -0,0 +1,23 @@
+//
+// Copyright (C) 2021 The LineageOS Project
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+cc_binary {
+    name: "android.hardware.light-service.exynos9810",
+    relative_install_path: "hw",
+    init_rc: ["android.hardware.light-service.exynos9810.rc"],
+    vintf_fragments: ["android.hardware.light-service.exynos9810.xml"],
+    local_include_dirs: ["include"],
+    srcs: [
+        "Lights.cpp",
+        "service.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder_ndk",
+        "android.hardware.light-V1-ndk",
+    ],
+    vendor: true,
+}

aidl/light/Lights.cpp

@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define LOG_TAG "android.hardware.lights-service.exynos9810"
+
+#include <android-base/stringprintf.h>
+#include <fstream>
+
+#include "Lights.h"
+
+#define COLOR_MASK 0x00ffffff
+#define MAX_INPUT_BRIGHTNESS 255
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace light {
+
+/*
+ * Write value to path and close file.
+ */
+template <typename T>
+static void set(const std::string& path, const T& value) {
+    std::ofstream file(path);
+    file << value << std::endl;
+}
+
+template <typename T>
+static T get(const std::string& path, const T& def) {
+    std::ifstream file(path);
+    T result;
+
+    file >> result;
+    return file.fail() ? def : result;
+}
+
+Lights::Lights() {
+    mLights.emplace(LightType::BACKLIGHT,
+                    std::bind(&Lights::handleBacklight, this, std::placeholders::_1));
+#ifdef BUTTON_BRIGHTNESS_NODE
+    mLights.emplace(LightType::BUTTONS, std::bind(&Lights::handleButtons, this, std::placeholders::_1));
+#endif /* BUTTON_BRIGHTNESS_NODE */
+#ifdef LED_BLINK_NODE
+    mLights.emplace(LightType::BATTERY, std::bind(&Lights::handleBattery, this, std::placeholders::_1));
+    mLights.emplace(LightType::NOTIFICATIONS,
+                    std::bind(&Lights::handleNotifications, this, std::placeholders::_1));
+    mLights.emplace(LightType::ATTENTION,
+                    std::bind(&Lights::handleAttention, this, std::placeholders::_1));
+#endif /* LED_BLINK_NODE */
+}
+
+ndk::ScopedAStatus Lights::setLightState(int32_t id, const HwLightState& state) {
+    LightType type = static_cast<LightType>(id);
+    auto it = mLights.find(type);
+
+    if (it == mLights.end()) {
+        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    }
+
+    /*
+     * Lock global mutex until light state is updated.
+     */
+    std::lock_guard<std::mutex> lock(mLock);
+
+    it->second(state);
+
+    return ndk::ScopedAStatus::ok();
+}
+
+void Lights::handleBacklight(const HwLightState& state) {
+    uint32_t max_brightness = get(PANEL_MAX_BRIGHTNESS_NODE, MAX_INPUT_BRIGHTNESS);
+    uint32_t brightness = rgbToBrightness(state);
+
+    if (max_brightness != MAX_INPUT_BRIGHTNESS) {
+        brightness = brightness * max_brightness / MAX_INPUT_BRIGHTNESS;
+    }
+
+    set(PANEL_BRIGHTNESS_NODE, brightness);
+}
+
+#ifdef BUTTON_BRIGHTNESS_NODE
+void Lights::handleButtons(const HwLightState& state) {
+#ifdef VAR_BUTTON_BRIGHTNESS
+    uint32_t brightness = rgbToBrightness(state);
+#else
+    uint32_t brightness = (state.color & COLOR_MASK) ? 1 : 0;
+#endif
+
+    set(BUTTON_BRIGHTNESS_NODE, brightness);
+}
+#endif
+
+#ifdef LED_BLINK_NODE
+void Lights::handleBattery(const HwLightState& state) {
+    mBatteryState = state;
+    setNotificationLED();
+}
+
+void Lights::handleNotifications(const HwLightState& state) {
+    mNotificationState = state;
+    setNotificationLED();
+}
+
+void Lights::handleAttention(const HwLightState& state) {
+    mAttentionState = state;
+    setNotificationLED();
+}
+
+void Lights::setNotificationLED() {
+    int32_t adjusted_brightness = MAX_INPUT_BRIGHTNESS;
+    HwLightState state;
+#ifdef LED_BLN_NODE
+    bool bln = false;
+#endif /* LED_BLN_NODE */
+
+    if (mNotificationState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_NOTIFICATION;
+        state = mNotificationState;
+#ifdef LED_BLN_NODE
+        bln = true;
+#endif /* LED_BLN_NODE */
+    } else if (mAttentionState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_ATTENTION;
+        state = mAttentionState;
+        if (state.flashMode == FlashMode::HARDWARE) {
+            if (state.flashOnMs > 0 && state.flashOffMs == 0) state.flashMode = FlashMode::NONE;
+            state.color = 0x000000ff;
+        }
+        if (state.flashMode == FlashMode::NONE) {
+            state.color = 0;
+        }
+    } else if (mBatteryState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_BATTERY;
+        state = mBatteryState;
+    } else {
+        set(LED_BLINK_NODE, "0x00000000 0 0");
+        return;
+    }
+
+    if (state.flashMode == FlashMode::NONE) {
+        state.flashOnMs = 0;
+        state.flashOffMs = 0;
+    }
+
+    state.color = calibrateColor(state.color & COLOR_MASK, adjusted_brightness);
+    set(LED_BLINK_NODE, ::android::base::StringPrintf("0x%08x %d %d", state.color, state.flashOnMs,
+                                                    state.flashOffMs));
+
+#ifdef LED_BLN_NODE
+    if (bln) {
+        set(LED_BLN_NODE, (state.color & COLOR_MASK) ? 1 : 0);
+    }
+#endif /* LED_BLN_NODE */
+}
+
+uint32_t Lights::calibrateColor(uint32_t color, int32_t brightness) {
+    uint32_t red = ((color >> 16) & 0xFF) * LED_ADJUSTMENT_R;
+    uint32_t green = ((color >> 8) & 0xFF) * LED_ADJUSTMENT_G;
+    uint32_t blue = (color & 0xFF) * LED_ADJUSTMENT_B;
+
+    return (((red * brightness) / 255) << 16) + (((green * brightness) / 255) << 8) +
+           ((blue * brightness) / 255);
+}
+#endif /* LED_BLINK_NODE */
+
+#define AutoHwLight(light) {.id = (int32_t)light, .type = light, .ordinal = 0}
+
+ndk::ScopedAStatus Lights::getLights(std::vector<HwLight> *_aidl_return) {
+    for (auto const& light : mLights) {
+        _aidl_return->push_back(AutoHwLight(light.first));
+    }
+
+    return ndk::ScopedAStatus::ok();
+}
+
+uint32_t Lights::rgbToBrightness(const HwLightState& state) {
+    uint32_t color = state.color & COLOR_MASK;
+
+    return ((77 * ((color >> 16) & 0xff)) + (150 * ((color >> 8) & 0xff)) + (29 * (color & 0xff))) >>
+           8;
+}
+
+} // namespace light
+} // namespace hardware
+} // namespace android
+} // namespace aidl

aidl/light/Lights.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/light/BnLights.h>
+#include <unordered_map>
+#include "samsung_lights.h"
+
+using ::aidl::android::hardware::light::HwLightState;
+using ::aidl::android::hardware::light::HwLight;
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace light {
+
+class Lights : public BnLights {
+public:
+    Lights();
+
+    ndk::ScopedAStatus setLightState(int32_t id, const HwLightState& state) override;
+    ndk::ScopedAStatus getLights(std::vector<HwLight> *_aidl_return) override;
+
+private:
+    void handleBacklight(const HwLightState& state);
+#ifdef BUTTON_BRIGHTNESS_NODE
+    void handleButtons(const HwLightState& state);
+#endif /* BUTTON_BRIGHTNESS_NODE */
+#ifdef LED_BLINK_NODE
+    void handleBattery(const HwLightState& state);
+    void handleNotifications(const HwLightState& state);
+    void handleAttention(const HwLightState& state);
+    void setNotificationLED();
+    uint32_t calibrateColor(uint32_t color, int32_t brightness);
+
+    HwLightState mAttentionState;
+    HwLightState mBatteryState;
+    HwLightState mNotificationState;
+#endif /* LED_BLINK_NODE */
+
+    uint32_t rgbToBrightness(const HwLightState& state);
+
+    std::mutex mLock;
+    std::unordered_map<LightType, std::function<void(const HwLightState&)>> mLights;
+};
+
+} // namespace light
+} // namespace hardware
+} // namespace android
+} // namespace aidl

aidl/light/android.hardware.light-service.exynos9810.rc

@@ -0,0 +1,5 @@
+service vendor.light-default /vendor/bin/hw/android.hardware.light-service.exynos9810
+    class hal
+    user system
+    group system
+    shutdown critical

aidl/light/android.hardware.light-service.exynos9810.xml

@@ -0,0 +1,6 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>android.hardware.light</name>
+        <fqname>ILights/default</fqname>
+    </hal>
+</manifest>

aidl/light/include/samsung_lights.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *               2017-2022 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.
+ */
+
+#pragma once
+
+/*
+ * Board specific nodes
+ *
+ * If your kernel exposes these controls in another place, you can either
+ * symlink to the locations given here, or override this header in your
+ * device tree.
+ */
+#define PANEL_BRIGHTNESS_NODE "/sys/class/backlight/panel/brightness"
+#define PANEL_MAX_BRIGHTNESS_NODE "/sys/class/backlight/panel/max_brightness"
+#define BUTTON_BRIGHTNESS_NODE "/sys/class/sec/sec_touchkey/brightness"
+#define LED_BLINK_NODE "/sys/class/sec/led/led_blink"
+#define LED_BLN_NODE "/sys/class/misc/backlightnotification/notification_led"
+
+// Uncomment to enable variable button brightness
+//#define VAR_BUTTON_BRIGHTNESS 1
+
+/*
+ * Brightness adjustment factors
+ *
+ * If one of your device's LEDs is more powerful than the others, use these
+ * values to equalise them. This value is in the range 0.0-1.0.
+ */
+#define LED_ADJUSTMENT_R 1.0
+#define LED_ADJUSTMENT_G 1.0
+#define LED_ADJUSTMENT_B 1.0
+
+/*
+ * Light brightness factors
+ *
+ * It might make sense for all colours to be scaled down (for example, if your
+ * LED is too bright). Use these values to adjust the brightness of each
+ * light. This value is within the range 0-255.
+ */
+#define LED_BRIGHTNESS_BATTERY 255
+#define LED_BRIGHTNESS_NOTIFICATION 255
+#define LED_BRIGHTNESS_ATTENTION 255

aidl/light/service.cpp

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define LOG_TAG "android.hardware.light-service.exynos9810"
+
+#include "Lights.h"
+
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+#include <android-base/logging.h>
+
+using ::aidl::android::hardware::light::Lights;
+
+int main() {
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+    std::shared_ptr<Lights> lights = ndk::SharedRefBase::make<Lights>();
+
+    const std::string instance = std::string() + Lights::descriptor + "/default";
+    binder_status_t status = AServiceManager_addService(lights->asBinder().get(), instance.c_str());
+    CHECK(status == STATUS_OK);
+
+    ABinderProcess_joinThreadPool();
+    return EXIT_FAILURE; // should not reach
+}

common.mk

@@ -396,6 +396,10 @@ PRODUCT_PACKAGES += \
 PRODUCT_PACKAGES += \
     android.hardware.vibrator-service.sm7125
 
+# Light
+PRODUCT_PACKAGES += \
+    android.hardware.light-service.exynos9810
+
 # Tether
 PRODUCT_PACKAGES += \
     ipacm \

sepolicy/vendor/file_contexts

@@ -63,6 +63,10 @@
 /(vendor|system/vendor)/bin/hw/android.hardware.biometrics.fingerprint@2.3-service-samsung.sm7125           u:object_r:hal_fingerprint_default_exec:s0
 /(vendor|system/vendor)/bin/hw/vendor.samsung.hardware.thermal@1.0-service                                  u:object_r:hal_thermal_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android.hardware.sensors@[0-9].[0-9]-service.samsung-multihal                u:object_r:hal_sensors_default_exec:s0
+
+# WIP
+/(vendor|system/vendor)/bin/hw/android\.hardware\.light(@[0-9].[0-9])?-service\.exynos9810                 u:object_r:hal_light_default_exec:s0
+/(vendor|system/vendor)/bin/hw/android\.hardware\.vibrator(@[0-9].[0-9])?-service\.exynos9810              u:object_r:hal_vibrator_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.sensors-service(\.exynos9810-multihal)?                   u:object_r:hal_sensors_default_exec:s0
 
 /(vendor|system/vendor)/bin/hw/android.hardware.vibrator-service.sm7125                                     u:object_r:hal_vibrator_default_exec:s0