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berlna: Clean up lights HAL

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Change-Id: Iaa5f7b62261730d12ddbbdc0c87ef3c2fbf8b395
This commit is contained in:
dianlujitao 2022-02-15 23:43:11 +08:00 committed by Andrew Hexen
parent f9e7851d2b
commit f364528ccf
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GPG key ID: 8A690B4B0CD461A2
3 changed files with 72 additions and 104 deletions
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140
lights/Lights.cpp
View file

@ -1,6 +1,6 @@
/*
* Copyright (C) 2019 The Android Open Source Project
* Copyright (C) 2020-2021 The LineageOS 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.
@ -21,27 +21,26 @@
#include <android-base/file.h>
#include <android-base/logging.h>
namespace {
/* 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 LEDS(x) PPCAT(/sys/class/leds, x)
#define WHITE_ATTR(x) STRINGIFY(PPCAT(LEDS(charging), x))
#define CHARGING_ATTR(x) STRINGIFY(PPCAT(/sys/class/leds/charging, x))
/* clang-format on */
using ::android::base::ReadFileToString;
using ::android::base::WriteStringToFile;
namespace aidl {
namespace android {
namespace hardware {
namespace light {
// Default max brightness
constexpr auto kDefaultMaxLedBrightness = 255;
namespace {
// Write value to path and close file.
bool WriteToFile(const std::string& path, uint32_t content) {
return WriteStringToFile(std::to_string(content), path);
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) {
@ -63,97 +62,72 @@ uint32_t RgbaToBrightness(uint32_t color) {
return (77 * red + 150 * green + 29 * blue) >> 8;
}
inline uint32_t RgbaToBrightness(uint32_t color, uint32_t max_brightness) {
return RgbaToBrightness(color) * max_brightness / 0xFF;
}
inline bool IsLit(uint32_t color) {
return color & 0x00ffffff;
}
void ApplyNotificationState(const HwLightState& state) {
auto brightness = RgbaToBrightness(state.color);
// Turn off the leds (initially)
WriteToFile(CHARGING_ATTR(breath), 0);
if (state.flashMode == FlashMode::TIMED && state.flashOnMs > 0 && state.flashOffMs > 0) {
WriteToFile(CHARGING_ATTR(delay_on), state.flashOnMs);
WriteToFile(CHARGING_ATTR(delay_off), state.flashOffMs);
WriteToFile(CHARGING_ATTR(breath), 1);
} else {
WriteToFile(CHARGING_ATTR(brightness), brightness);
}
}
} // anonymous namespace
namespace aidl {
namespace android {
namespace hardware {
namespace light {
Lights::Lights() {
std::map<int, std::function<void(int id, const HwLightState&)>> lights_{
{(int)LightType::NOTIFICATIONS,
[this](auto&&... args) { setLightNotification(args...); }},
{(int)LightType::BATTERY, [this](auto&&... args) { setLightNotification(args...); }},
{(int)LightType::BACKLIGHT, {}}};
std::vector<HwLight> availableLights;
for (auto const& pair : lights_) {
int id = pair.first;
HwLight hwLight{};
hwLight.id = id;
availableLights.emplace_back(hwLight);
}
mAvailableLights = availableLights;
mLights = lights_;
std::string buf;
if (ReadFileToString(WHITE_ATTR(max_brightness), &buf)) {
max_led_brightness_ = std::stoi(buf);
} else {
max_led_brightness_ = kDefaultMaxLedBrightness;
LOG(ERROR) << "Failed to read max LED brightness, fallback to " << kDefaultMaxLedBrightness;
}
}
ndk::ScopedAStatus Lights::setLightState(int id, const HwLightState& state) {
auto it = mLights.find(id);
if (it == mLights.end()) {
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);
}
it->second(id, state);
// 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) {
for (auto i = mAvailableLights.begin(); i != mAvailableLights.end(); i++) {
lights->push_back(*i);
}
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();
}
void Lights::setLightNotification(int id, const HwLightState& state) {
bool found = false;
for (auto&& [cur_id, cur_state] : notif_states_) {
if (cur_id == id) {
cur_state = state;
}
// Fallback to battery light
if (!found && (cur_id == (int)LightType::BATTERY || IsLit(cur_state.color))) {
found = true;
LOG(DEBUG) << __func__ << ": id=" << id;
applyNotificationState(cur_state);
}
}
}
void Lights::applyNotificationState(const HwLightState& state) {
int brightness = RgbaToBrightness(state.color, max_led_brightness_);
// Turn off the leds (initially)
WriteToFile(WHITE_ATTR(breath), 0);
if (state.flashMode == FlashMode::TIMED && state.flashOnMs > 0 && state.flashOffMs > 0) {
WriteToFile(WHITE_ATTR(delay_on), static_cast<uint32_t>(state.flashOnMs));
WriteToFile(WHITE_ATTR(delay_off), static_cast<uint32_t>(state.flashOffMs));
WriteToFile(WHITE_ATTR(breath), 1);
} else {
WriteToFile(WHITE_ATTR(brightness), brightness);
}
}
} // namespace light
} // namespace hardware
} // namespace android

29
lights/Lights.h
View file

@ -1,6 +1,6 @@
/*
* Copyright (C) 2020 The Android Open Source Project
* Copyright (C) 2020-2021 The LineageOS 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.
@ -18,36 +18,27 @@
#pragma once
#include <aidl/android/hardware/light/BnLights.h>
#include <hardware/hardware.h>
#include <hardware/lights.h>
#include <map>
#include <sstream>
#include <array>
namespace aidl {
namespace android {
namespace hardware {
namespace light {
// Keep sorted in the order of priority.
constexpr std::array kAvailableLights = {
// id, ordinal, type
HwLight{static_cast<int32_t>(LightType::NOTIFICATIONS), 0, LightType::NOTIFICATIONS},
HwLight{static_cast<int32_t>(LightType::BATTERY), 0, LightType::BATTERY},
};
class Lights : public BnLights {
public:
Lights();
ndk::ScopedAStatus setLightState(int id, const HwLightState& state) override;
ndk::ScopedAStatus getLights(std::vector<HwLight>* types) override;
private:
void setLightNotification(int id, const HwLightState& state);
void applyNotificationState(const HwLightState& state);
uint32_t max_led_brightness_;
std::map<int, std::function<void(int id, const HwLightState&)>> mLights;
std::vector<HwLight> mAvailableLights;
// Keep sorted in the order of importance.
std::array<std::pair<int, HwLightState>, 2> notif_states_ = {{
{(int)LightType::NOTIFICATIONS, {}},
{(int)LightType::BATTERY, {}},
}};
std::array<HwLightState, kAvailableLights.size()> notif_states_;
};
} // namespace light

13
lights/android.hardware.lights.berlna.rc
View file

@ -6,12 +6,15 @@ service vendor.light /vendor/bin/hw/android.hardware.lights-service.berlna
on boot
# Change ownership and permission for leds backlight
chmod 0664 /sys/class/leds/lcd-backlight/brightness
chown system system /sys/class/leds/charging/breath
chmod 0664 /sys/class/leds/charging/breath
chown system system /sys/class/leds/charging/brightness
chmod 0664 /sys/class/leds/charging/brightness
chown system system /sys/class/leds/charging/breath
chmod 660 /sys/class/leds/charging/breath
chown system system /sys/class/leds/charging/delay_off
chmod 660 /sys/class/leds/charging/delay_off
chmod 0664 /sys/class/leds/charging/delay_off
chown system system /sys/class/leds/charging/delay_on
chmod 660 /sys/class/leds/charging/delay_on
chmod 0664 /sys/class/leds/charging/delay_on
# change permission of red leds
chown system system /sys/class/leds/red/brightness
chmod 0664 /sys/class/leds/red/brightness