sm8250-common: import lights aidl

from https://github.com/LineageOS/android_device_motorola_nio e3a36424d4a7de739661061c3bd6fc2c5102da50

lights/Lights.cpp

@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * Copyright (C) 2020-2022 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.
+ */
+
+#define LOG_TAG "android.hardware.lights-service.motokona"
+
+#include "Lights.h"
+#include <android-base/file.h>
+#include <android-base/logging.h>
+
+/* clang-format off */
+#define PPCAT_NX(A, B) A/B
+#define PPCAT(A, B) PPCAT_NX(A, B)
+#define STRINGIFY_INNER(x) #x
+#define STRINGIFY(x) STRINGIFY_INNER(x)
+
+#define CHARGING_ATTR(x) STRINGIFY(PPCAT(/sys/class/leds/charging, x))
+/* clang-format on */
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace light {
+
+namespace {
+
+// Write value to path and close file.
+template <typename T>
+inline bool WriteToFile(const std::string& path, T content) {
+    return ::android::base::WriteStringToFile(std::to_string(content), path);
+}
+
+uint32_t RgbaToBrightness(uint32_t color) {
+    // Extract brightness from AARRGGBB.
+    uint32_t alpha = (color >> 24) & 0xFF;
+
+    // Retrieve each of the RGB colors
+    uint32_t red = (color >> 16) & 0xFF;
+    uint32_t green = (color >> 8) & 0xFF;
+    uint32_t blue = color & 0xFF;
+
+    // Scale RGB colors if a brightness has been applied by the user
+    if (alpha != 0xFF && alpha != 0) {
+        red = red * alpha / 0xFF;
+        green = green * alpha / 0xFF;
+        blue = blue * alpha / 0xFF;
+    }
+
+    return (77 * red + 150 * green + 29 * blue) >> 8;
+}
+
+inline bool IsLit(uint32_t color) {
+    return color & 0x00ffffff;
+}
+
+void ApplyNotificationState(const HwLightState& state) {
+    bool blink = state.flashOnMs > 0 && state.flashOffMs > 0;
+    bool ok = false;
+
+    switch (state.flashMode) {
+        case FlashMode::HARDWARE:
+            ok = WriteToFile(CHARGING_ATTR(breath), blink);
+            // fallback to timed blinking if breath is not supported
+            if (ok) break;
+            FALLTHROUGH_INTENDED;
+        case FlashMode::TIMED:
+            ok = WriteToFile(CHARGING_ATTR(delay_off), state.flashOffMs);
+            ok &= WriteToFile(CHARGING_ATTR(delay_on), state.flashOnMs);
+            // fallback to constant on if timed blinking is not supported
+            if (ok) break;
+            FALLTHROUGH_INTENDED;
+        case FlashMode::NONE:
+        default:
+            ok = WriteToFile(CHARGING_ATTR(brightness), RgbaToBrightness(state.color));
+            break;
+    }
+
+    LOG(DEBUG) << __func__ << ": mode=" << toString(state.flashMode) << ", colorRGB=" << std::hex
+               << state.color << std::dec << ", onMS=" << state.flashOnMs
+               << ", offMS=" << state.flashOffMs << ", ok=" << ok;
+}
+
+}  // anonymous namespace
+
+ndk::ScopedAStatus Lights::setLightState(int id, const HwLightState& state) {
+    static_assert(kAvailableLights.size() == std::tuple_size_v<decltype(notif_states_)>);
+
+    if (id == static_cast<int32_t>(LightType::BACKLIGHT)) {
+        // Stub backlight handling
+        return ndk::ScopedAStatus::ok();
+    }
+
+    // Update saved state first
+    bool found = false;
+    for (size_t i = 0; i < notif_states_.size(); ++i) {
+        if (kAvailableLights[i].id == id) {
+            notif_states_[i] = state;
+            LOG(DEBUG) << __func__ << ": updating id=" << id
+                       << ", type=" << toString(kAvailableLights[i].type);
+            found = true;
+            break;
+        }
+    }
+    if (!found) {
+        LOG(ERROR) << "Light not supported";
+        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    }
+
+    // Lit up in order or fallback to battery light if others are dim
+    for (size_t i = 0; i < notif_states_.size(); ++i) {
+        auto&& cur_state = notif_states_[i];
+        auto&& cur_light = kAvailableLights[i];
+        if (IsLit(cur_state.color) || cur_light.type == LightType::BATTERY) {
+            LOG(DEBUG) << __func__ << ": applying id=" << cur_light.id
+                       << ", type=" << toString(cur_light.type);
+            ApplyNotificationState(cur_state);
+            break;
+        }
+    }
+
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Lights::getLights(std::vector<HwLight>* lights) {
+    lights->insert(lights->end(), kAvailableLights.begin(), kAvailableLights.end());
+    // We don't handle backlight but still need to report as supported.
+    lights->push_back({static_cast<int32_t>(LightType::BACKLIGHT), 0, LightType::BACKLIGHT});
+    return ndk::ScopedAStatus::ok();
+}
+
+}  // namespace light
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl