power-8916.c

/*
 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * *    * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * Neither the name of The Linux Foundation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define LOG_NIDEBUG 0

#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>

#define LOG_TAG "QTI PowerHAL"
#include <hardware/hardware.h>
#include <hardware/power.h>
#include <log/log.h>

#include "hint-data.h"
#include "metadata-defs.h"
#include "performance.h"
#include "power-common.h"
#include "utils.h"

/**
 * Returns true if the target is MSM8916.
 */
static bool is_target_8916(void) {
    static int is_8916 = -1;
    int soc_id;

    if (is_8916 >= 0) return is_8916;

    soc_id = get_soc_id();
    is_8916 = soc_id == 206 || (soc_id >= 247 && soc_id <= 250);

    return is_8916;
}

// clang-format off
static int resources_interaction_fling_boost[] = {
    ALL_CPUS_PWR_CLPS_DIS,
    SCHED_BOOST_ON,
    SCHED_PREFER_IDLE_DIS,
    0x20D
};

static int resources_interaction_boost[] = {
    ALL_CPUS_PWR_CLPS_DIS,
    SCHED_PREFER_IDLE_DIS,
    0x20D
};

static int resources_launch[] = {
    ALL_CPUS_PWR_CLPS_DIS,
    SCHED_BOOST_ON,
    SCHED_PREFER_IDLE_DIS,
    0x20F,
    0x1C00,
    0x4001,
    0x4101,
    0x4201
};
// clang-format on

const int kDefaultInteractiveDuration = 500; /* ms */
const int kMinFlingDuration = 1500;          /* ms */
const int kMaxInteractiveDuration = 5000;    /* ms */
const int kMaxLaunchDuration = 5000;         /* ms */

static void process_interaction_hint(void* data) {
    static struct timespec s_previous_boost_timespec;
    static int s_previous_duration = 0;

    struct timespec cur_boost_timespec;
    long long elapsed_time;
    int duration = kDefaultInteractiveDuration;

    if (data) {
        int input_duration = *((int*)data);
        if (input_duration > duration) {
            duration = (input_duration > kMaxInteractiveDuration) ? kMaxInteractiveDuration
                                                                  : input_duration;
        }
    }

    clock_gettime(CLOCK_MONOTONIC, &cur_boost_timespec);

    elapsed_time = calc_timespan_us(s_previous_boost_timespec, cur_boost_timespec);
    // don't hint if it's been less than 250ms since last boost
    // also detect if we're doing anything resembling a fling
    // support additional boosting in case of flings
    if (elapsed_time < 250000 && duration <= 750) {
        return;
    }
    s_previous_boost_timespec = cur_boost_timespec;
    s_previous_duration = duration;

    if (duration >= kMinFlingDuration) {
        interaction(duration, ARRAY_SIZE(resources_interaction_fling_boost),
                    resources_interaction_fling_boost);
    } else {
        interaction(duration, ARRAY_SIZE(resources_interaction_boost), resources_interaction_boost);
    }
}

static int process_activity_launch_hint(void* data) {
    static int launch_handle = -1;
    static int launch_mode = 0;

    // release lock early if launch has finished
    if (!data) {
        if (CHECK_HANDLE(launch_handle)) {
            release_request(launch_handle);
            launch_handle = -1;
        }
        launch_mode = 0;
        return HINT_HANDLED;
    }

    if (!launch_mode) {
        launch_handle = interaction_with_handle(launch_handle, kMaxLaunchDuration,
                                                ARRAY_SIZE(resources_launch), resources_launch);
        if (!CHECK_HANDLE(launch_handle)) {
            ALOGE("Failed to perform launch boost");
            return HINT_NONE;
        }
        launch_mode = 1;
    }
    return HINT_HANDLED;
}

int power_hint_override(power_hint_t hint, void* data) {
    int ret_val = HINT_NONE;
    switch (hint) {
        case POWER_HINT_VIDEO_ENCODE: /* Do nothing for encode case */
            ret_val = HINT_HANDLED;
            break;
        case POWER_HINT_INTERACTION:
            process_interaction_hint(data);
            ret_val = HINT_HANDLED;
            break;
        case POWER_HINT_LAUNCH:
            ret_val = process_activity_launch_hint(data);
            break;
        default:
            break;
    }
    return ret_val;
}

int set_interactive_override(int on) {
    char governor[80];

    if (get_scaling_governor(governor, sizeof(governor)) == -1) {
        ALOGE("Can't obtain scaling governor.");
        return HINT_NONE;
    }

    if (!on) {
        /* Display off */
        if (is_target_8916()) {
            if (is_interactive_governor(governor)) {
                int resource_values[] = {TR_MS_50, THREAD_MIGRATION_SYNC_OFF};
                perform_hint_action(DISPLAY_STATE_HINT_ID, resource_values,
                                    ARRAY_SIZE(resource_values));
            }
        } else {
            if (is_interactive_governor(governor)) {
                int resource_values[] = {TR_MS_CPU0_50, TR_MS_CPU4_50, THREAD_MIGRATION_SYNC_OFF};
                perform_hint_action(DISPLAY_STATE_HINT_ID, resource_values,
                                    ARRAY_SIZE(resource_values));
            }
        }
    } else {
        /* Display on */
        if (is_interactive_governor(governor)) {
            undo_hint_action(DISPLAY_STATE_HINT_ID);
        }
    }
    return HINT_HANDLED;
}