Re-introduce of POWER HAL API 1.1 impl for Wahoo

Power HAL 1.1 support for wahoo based devices was initially introduced in CL
ag/2098359
However, this caused a regression in application startup times due
to a bug in passing parameters for power hints on application launch
Hence, that CL was reverted in CL ag/2270791

This commit brings back the support of the Power Hal 1.1
to wahoo based devices. This includes the changes of the original CL
as will as a fix for the app startup time regression

The fix is similar to that in ag/1767023 (done for power HAL 1.0 default
implementation)
where a NULL is passed to the powerHint function when the passed data is
Zero
(instead of passing a pointer to the data). This enable the App Launch
power hints to work properly

The commit has been tested not to cause that regression

Bug: 62040325
Test: Performance Tests along with other tests

Change-Id: I29ce38b2de92c2b9ad878b0076288b689695b8a0
Signed-off-by: Ahmed ElArabawy <arabawy@google.com>

power/Power.cpp

@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2017 The Android Open Source 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.power@1.1-service.wahoo"
+
+#include <android/log.h>
+#include <utils/Log.h>
+#include "Power.h"
+#include "power-common.h"
+#include "power-helper.h"
+
+/* RPM runs at 19.2Mhz. Divide by 19200 for msec */
+#define RPM_CLK 19200
+
+extern struct stat_pair rpm_stat_map[];
+
+namespace android {
+namespace hardware {
+namespace power {
+namespace V1_1 {
+namespace implementation {
+
+using ::android::hardware::power::V1_0::Feature;
+using ::android::hardware::power::V1_0::PowerHint;
+using ::android::hardware::power::V1_0::PowerStatePlatformSleepState;
+using ::android::hardware::power::V1_0::Status;
+using ::android::hardware::power::V1_1::PowerStateSubsystem;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+Power::Power() {
+    power_init();
+}
+
+// Methods from ::android::hardware::power::V1_0::IPower follow.
+Return<void> Power::setInteractive(bool interactive)  {
+    power_set_interactive(interactive ? 1 : 0);
+    return Void();
+}
+
+Return<void> Power::powerHint(PowerHint hint, int32_t data) {
+
+    power_hint(static_cast<power_hint_t>(hint), data ? (&data) : NULL);
+
+    return Void();
+}
+
+Return<void> Power::setFeature(Feature /*feature*/, bool /*activate*/)  {
+    //Nothing to do
+    return Void();
+}
+
+Return<void> Power::getPlatformLowPowerStats(getPlatformLowPowerStats_cb _hidl_cb) {
+
+    hidl_vec<PowerStatePlatformSleepState> states;
+    uint64_t stats[MAX_PLATFORM_STATS * MAX_RPM_PARAMS] = {0};
+    uint64_t *values;
+    struct PowerStatePlatformSleepState *state;
+    int ret;
+
+    states.resize(PLATFORM_SLEEP_MODES_COUNT);
+
+    ret = extract_platform_stats(stats);
+    if (ret != 0) {
+        states.resize(0);
+        goto done;
+    }
+
+    /* Update statistics for XO_shutdown */
+    state = &states[RPM_MODE_XO];
+    state->name = "XO_shutdown";
+    values = stats + (RPM_MODE_XO * MAX_RPM_PARAMS);
+
+    state->residencyInMsecSinceBoot = values[1];
+    state->totalTransitions = values[0];
+    state->supportedOnlyInSuspend = false;
+    state->voters.resize(XO_VOTERS);
+    for(size_t i = 0; i < XO_VOTERS; i++) {
+        int voter = i + XO_VOTERS_START;
+        state->voters[i].name = rpm_stat_map[voter].label;
+        values = stats + (voter * MAX_RPM_PARAMS);
+        state->voters[i].totalTimeInMsecVotedForSinceBoot = values[0] / RPM_CLK;
+        state->voters[i].totalNumberOfTimesVotedSinceBoot = values[1];
+    }
+
+    /* Update statistics for VMIN state */
+    state = &states[RPM_MODE_VMIN];
+    state->name = "VMIN";
+    values = stats + (RPM_MODE_VMIN * MAX_RPM_PARAMS);
+
+    state->residencyInMsecSinceBoot = values[1];
+    state->totalTransitions = values[0];
+    state->supportedOnlyInSuspend = false;
+    state->voters.resize(VMIN_VOTERS);
+    //Note: No filling of state voters since VMIN_VOTERS = 0
+
+done:
+    _hidl_cb(states, Status::SUCCESS);
+    return Void();
+}
+
+static int get_wlan_low_power_stats(struct PowerStateSubsystem &subsystem) {
+
+    uint64_t stats[WLAN_POWER_PARAMS_COUNT] = {0};
+    struct PowerStateSubsystemSleepState *state;
+    int ret;
+
+    ret = extract_wlan_stats(stats);
+    if (ret)
+        return ret;
+
+    subsystem.name = "wlan";
+    subsystem.states.resize(WLAN_STATES_COUNT);
+
+    /* Update statistics for Active State */
+    state = &subsystem.states[WLAN_STATE_ACTIVE];
+    state->name = "Active";
+    state->residencyInMsecSinceBoot = stats[CUMULATIVE_TOTAL_ON_TIME_MS];
+    state->totalTransitions = stats[DEEP_SLEEP_ENTER_COUNTER];
+    state->lastEntryTimestampMs = 0; //FIXME need a new value from Qcom
+    state->supportedOnlyInSuspend = false;
+
+    /* Update statistics for Deep-Sleep state */
+    state = &subsystem.states[WLAN_STATE_DEEP_SLEEP];
+    state->name = "Deep-Sleep";
+    state->residencyInMsecSinceBoot = stats[CUMULATIVE_SLEEP_TIME_MS];
+    state->totalTransitions = stats[DEEP_SLEEP_ENTER_COUNTER];
+    state->lastEntryTimestampMs = stats[LAST_DEEP_SLEEP_ENTER_TSTAMP_MS];
+    state->supportedOnlyInSuspend = false;
+
+    return 0;
+}
+
+// Methods from ::android::hardware::power::V1_1::IPower follow.
+Return<void> Power::getSubsystemLowPowerStats(getSubsystemLowPowerStats_cb _hidl_cb) {
+
+    hidl_vec<PowerStateSubsystem> subsystems;
+    int ret;
+
+    subsystems.resize(SUBSYSTEM_COUNT);
+
+    //We currently have only one Subsystem for WLAN
+    ret = get_wlan_low_power_stats(subsystems[SUBSYSTEM_WLAN]);
+    if (ret != 0)
+        goto done;
+
+    //Add query for other subsystems here
+
+done:
+    _hidl_cb(subsystems, Status::SUCCESS);
+    return Void();
+}
+
+}  // namespace implementation
+}  // namespace V1_1
+}  // namespace power
+}  // namespace hardware
+}  // namespace android