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whyred: turn light hal into a hidl service

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* Dropped low persistence mode which is only used for VR,
  which we are not shipping

Change-Id: I4fa56abd38c04d8fa267dbab67e54fe4a617bfe1
This commit is contained in:
Demon Singur 2018-04-15 10:55:05 +00:00 • committed by Vasishath Kaushal
parent e42c7c1626
commit a7654d5325
5 changed files with 409 additions and 0 deletions
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//
// Copyright (C) 2018 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.
cc_binary {
relative_install_path: "hw",
defaults: ["hidl_defaults"],
name: "android.hardware.light@2.0-service.xiaomi_msm8998",
proprietary: true,
init_rc: ["android.hardware.light@2.0-service.xiaomi_msm8998.rc"],
srcs: ["service.cpp", "Light.cpp"],
shared_libs: [
"libhardware",
"libhidlbase",
"libhidltransport",
"liblog",
"libhwbinder",
"libutils",
"android.hardware.light@2.0",
],
}

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/*
* Copyright (C) 2018 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 "LightService"
#include <log/log.h>
#include "Light.h"
#include <fstream>
#define LEDS "/sys/class/leds/"
#define BUTTON1_LED LEDS "button-backlight1/"
#define BUTTON_LED LEDS "button-backlight/"
#define LCD_LED LEDS "lcd-backlight/"
#define WHITE_LED LEDS "white/"
#define BLINK "blink"
#define BRIGHTNESS "brightness"
#define DUTY_PCTS "duty_pcts"
#define PAUSE_HI "pause_hi"
#define PAUSE_LO "pause_lo"
#define RAMP_STEP_MS "ramp_step_ms"
#define START_IDX "start_idx"
#define MAX_LED_BRIGHTNESS 255
#define MAX_LCD_BRIGHTNESS 4095
/*
* 8 duty percent steps.
*/
#define RAMP_STEPS 8
/*
* Each step will stay on for 50ms by default.
*/
#define RAMP_STEP_DURATION 50
/*
* Each value represents a duty percent (0 - 100) for the led pwm.
*/
static int32_t BRIGHTNESS_RAMP[RAMP_STEPS] = {0, 12, 25, 37, 50, 72, 85, 100};
namespace {
/*
* Write value to path and close file.
*/
static void set(std::string path, std::string value) {
std::ofstream file(path);
if (!file.is_open()) {
ALOGW("failed to write %s to %s", value.c_str(), path.c_str());
return;
}
file << value;
}
static void set(std::string path, int value) {
set(path, std::to_string(value));
}
static uint32_t getBrightness(const LightState& state) {
uint32_t alpha, red, green, blue;
/*
* Extract brightness from AARRGGBB.
*/
alpha = (state.color >> 24) & 0xFF;
red = (state.color >> 16) & 0xFF;
green = (state.color >> 8) & 0xFF;
blue = state.color & 0xFF;
/*
* Scale RGB brightness if Alpha brightness is not 0xFF.
*/
if (alpha != 0xFF) {
red = red * alpha / 0xFF;
green = green * alpha / 0xFF;
blue = blue * alpha / 0xFF;
}
return (77 * red + 150 * green + 29 * blue) >> 8;
}
static inline uint32_t scaleBrightness(uint32_t brightness, uint32_t maxBrightness) {
return brightness * maxBrightness / 0xFF;
}
static inline uint32_t getScaledBrightness(const LightState& state, uint32_t maxBrightness) {
return scaleBrightness(getBrightness(state), maxBrightness);
}
static void handleBacklight(Type /* type */, const LightState& state) {
uint32_t brightness = getScaledBrightness(state, MAX_LCD_BRIGHTNESS);
set(LCD_LED BRIGHTNESS, brightness);
}
static void handleButtons(Type /* type */, const LightState& state) {
uint32_t brightness = getScaledBrightness(state, MAX_LED_BRIGHTNESS);
set(BUTTON_LED BRIGHTNESS, brightness);
set(BUTTON1_LED BRIGHTNESS, brightness);
}
/*
* Scale each value of the brightness ramp according to the
* brightness of the color.
*/
static std::string getScaledRamp(uint32_t brightness) {
std::string ramp, pad;
for (auto const& step : BRIGHTNESS_RAMP) {
ramp += pad + std::to_string(step * brightness / 0xFF);
pad = ",";
}
return ramp;
}
static void setNotification(const LightState& state) {
uint32_t whiteBrightness = getScaledBrightness(state, MAX_LED_BRIGHTNESS);
/* Disable blinking */
set(WHITE_LED BLINK, 0);
if (state.flashMode == Flash::TIMED) {
/*
* If the flashOnMs duration is not long enough to fit ramping up
* and down at the default step duration, step duration is modified
* to fit.
*/
int32_t stepDuration = RAMP_STEP_DURATION;
int32_t pauseHi = state.flashOnMs - (stepDuration * RAMP_STEPS * 2);
int32_t pauseLo = state.flashOffMs;
if (pauseHi < 0) {
stepDuration = state.flashOnMs / (RAMP_STEPS * 2);
pauseHi = 0;
}
/* White */
set(WHITE_LED START_IDX, 0 * RAMP_STEPS);
set(WHITE_LED DUTY_PCTS, getScaledRamp(whiteBrightness));
set(WHITE_LED PAUSE_LO, pauseLo);
set(WHITE_LED PAUSE_HI, pauseHi);
set(WHITE_LED RAMP_STEP_MS, stepDuration);
/* Enable blinking */
set(WHITE_LED BLINK, 1);
} else {
set(WHITE_LED BRIGHTNESS, whiteBrightness);
}
}
static inline bool isLit(const LightState& state) {
return state.color & 0x00ffffff;
}
/*
* Keep sorted in the order of importance.
*/
static const LightState offState = {};
static std::vector<std::pair<Type, LightState>> notificationStates = {
{ Type::ATTENTION, offState },
{ Type::NOTIFICATIONS, offState },
{ Type::BATTERY, offState },
};
static void handleNotification(Type type, const LightState& state) {
for(auto it = notificationStates.begin(); it != notificationStates.end(); it++) {
if (it->first == type) {
it->second = state;
}
if (isLit(it->second)) {
setNotification(it->second);
return;
}
}
setNotification(offState);
}
static std::map<Type, std::function<void(Type type, const LightState&)>> lights = {
{ Type::ATTENTION, handleNotification },
{ Type::NOTIFICATIONS, handleNotification },
{ Type::BATTERY, handleNotification },
{ Type::BACKLIGHT, handleBacklight },
{ Type::BUTTONS, handleButtons },
};
} // anonymous namespace
namespace android {
namespace hardware {
namespace light {
namespace V2_0 {
namespace implementation {
Return<Status> Light::setLight(Type type, const LightState& state) {
auto it = lights.find(type);
if (it == lights.end()) {
return Status::LIGHT_NOT_SUPPORTED;
}
/*
* Lock global mutex until light state is updated.
*/
std::lock_guard<std::mutex> lock(globalLock);
it->second(type, state);
return Status::SUCCESS;
}
Return<void> Light::getSupportedTypes(getSupportedTypes_cb _hidl_cb) {
std::vector<Type> types;
for (auto const& light : lights) {
types.push_back(light.first);
}
_hidl_cb(types);
return Void();
}
} // namespace implementation
} // namespace V2_0
} // namespace light
} // namespace hardware
} // namespace android

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/*
* Copyright (C) 2018 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 ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H
#define ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H
#include <android/hardware/light/2.0/ILight.h>
#include <hardware/lights.h>
#include <hidl/Status.h>
#include <map>
#include <vector>
#include <mutex>
using ::android::hardware::Return;
using ::android::hardware::Void;
using ::android::hardware::hidl_vec;
using ::android::hardware::light::V2_0::ILight;
using ::android::hardware::light::V2_0::Flash;
using ::android::hardware::light::V2_0::LightState;
using ::android::hardware::light::V2_0::Status;
using ::android::hardware::light::V2_0::Type;
namespace android {
namespace hardware {
namespace light {
namespace V2_0 {
namespace implementation {
class Light : public ILight {
public:
Return<Status> setLight(Type type, const LightState& state) override;
Return<void> getSupportedTypes(getSupportedTypes_cb _hidl_cb) override;
private:
std::mutex globalLock;
};
} // namespace implementation
} // namespace V2_0
} // namespace light
} // namespace hardware
} // namespace android
#endif // ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H

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on boot
# White light
chown system system /sys/class/leds/white/brightness
chown system system /sys/class/leds/white/blink
chown system system /sys/class/leds/white/duty_pcts
chown system system /sys/class/leds/white/pause_hi
chown system system /sys/class/leds/white/pause_lo
chown system system /sys/class/leds/white/ramp_step_ms
chown system system /sys/class/leds/white/start_idx
chmod 660 /sys/class/leds/white/blink
chmod 660 /sys/class/leds/white/duty_pcts
chmod 660 /sys/class/leds/white/pause_hi
chmod 660 /sys/class/leds/white/pause_lo
chmod 660 /sys/class/leds/white/ramp_step_ms
chmod 660 /sys/class/leds/white/start_idx
# Button backlight
chown system system /sys/class/leds/button-backlight1/brightness
service light-hal-2-0 /vendor/bin/hw/android.hardware.light@2.0-service.xiaomi_msm8998
class hal
user system
group system

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/*
* Copyright (C) 2018 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.light@2.0-service.xiaomi_msm8998"
#include <hidl/HidlTransportSupport.h>
#include "Light.h"
using android::hardware::configureRpcThreadpool;
using android::hardware::joinRpcThreadpool;
using android::hardware::light::V2_0::ILight;
using android::hardware::light::V2_0::implementation::Light;
using android::OK;
using android::sp;
using android::status_t;
int main() {
android::sp<ILight> service = new Light();
configureRpcThreadpool(1, true);
status_t status = service->registerAsService();
if (status != OK) {
ALOGE("Cannot register Light HAL service.");
return 1;
}
ALOGI("Light HAL service ready.");
joinRpcThreadpool();
ALOGI("Light HAL service failed to join thread pool.");
return 1;
}