/*
 * Copyright (c) 2017, 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 <unistd.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"

static int video_encode_hint_sent;

/**
 * Returns true if the target is SDM630/SDM455.
 */
static bool is_target_SDM630(void) {
    static int is_SDM630 = -1;
    int soc_id;

    if (is_SDM630 >= 0) return is_SDM630;

    soc_id = get_soc_id();
    is_SDM630 = soc_id == 318 || soc_id == 327 || soc_id == 385;

    return is_SDM630;
}

static int process_video_encode_hint(void* metadata) {
    char governor[80];
    struct video_encode_metadata_t video_encode_metadata;

    if (!metadata) return HINT_NONE;

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

    /* Initialize encode metadata struct fields */
    memset(&video_encode_metadata, 0, sizeof(struct video_encode_metadata_t));
    video_encode_metadata.state = -1;
    video_encode_metadata.hint_id = DEFAULT_VIDEO_ENCODE_HINT_ID;

    if (parse_video_encode_metadata((char*)metadata, &video_encode_metadata) == -1) {
        ALOGE("Error occurred while parsing metadata.");
        return HINT_NONE;
    }

    if (video_encode_metadata.state == 1) {
        if (is_interactive_governor(governor)) {
            if (is_target_SDM630()) {
                /*
                    1. CPUfreq params
                        - hispeed freq for big - 1113Mhz
                        - go hispeed load for big - 95
                        - above_hispeed_delay for big - 40ms
                        - target loads - 95
                        - nr_run - 5
                    2. BusDCVS V2 params
                        - Sample_ms of 10ms
                 */
                int resource_values[] = {
                        HISPEED_FREQ_BIG,        0x459, GO_HISPEED_LOAD_BIG,   0x5F,
                        ABOVE_HISPEED_DELAY_BIG, 0x4,   TARGET_LOADS_BIG,      0x5F,
                        SCHED_SPILL_NR_RUN,      0X5,   CPUBW_HWMON_SAMPLE_MS, 0xA};
                if (!video_encode_hint_sent) {
                    perform_hint_action(video_encode_metadata.hint_id, resource_values,
                                        ARRAY_SIZE(resource_values));
                    video_encode_hint_sent = 1;
                    return HINT_HANDLED;
                }
            } else {
                /*
                    1. CPUfreq params
                        - hispeed freq for little - 902Mhz
                        - go hispeed load for little - 95
                        - above_hispeed_delay for little - 40ms
                    2. BusDCVS V2 params
                        - Sample_ms of 10ms
                 */
                int resource_values[] = {
                        HISPEED_FREQ_LITTLE,        0x386, GO_HISPEED_LOAD_LITTLE, 0x5F,
                        ABOVE_HISPEED_DELAY_LITTLE, 0x4,   CPUBW_HWMON_SAMPLE_MS,  0xA};
                if (!video_encode_hint_sent) {
                    perform_hint_action(video_encode_metadata.hint_id, resource_values,
                                        ARRAY_SIZE(resource_values));
                    video_encode_hint_sent = 1;
                    return HINT_HANDLED;
                }
            }
        }
    } else if (video_encode_metadata.state == 0) {
        if (is_interactive_governor(governor)) {
            undo_hint_action(video_encode_metadata.hint_id);
            video_encode_hint_sent = 0;
            return HINT_HANDLED;
        }
    }
    return HINT_NONE;
}

int power_hint_override(power_hint_t hint, void* data) {
    int ret_val = HINT_NONE;
    switch (hint) {
        case POWER_HINT_VIDEO_ENCODE:
            ret_val = process_video_encode_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_interactive_governor(governor)) {
            if (is_target_SDM630()) {
                /*
                    1. CPUfreq params
                        - hispeed freq for big - 1113Mhz
                        - go hispeed load for big - 95
                        - above_hispeed_delay for big - 40ms
                    2. BusDCVS V2 params
                       - Sample_ms of 10ms
                 */
                int resource_values[] = {
                        HISPEED_FREQ_BIG,        0x459, GO_HISPEED_LOAD_BIG,   0x5F,
                        ABOVE_HISPEED_DELAY_BIG, 0x4,   CPUBW_HWMON_SAMPLE_MS, 0xA};
                perform_hint_action(DISPLAY_STATE_HINT_ID, resource_values,
                                    ARRAY_SIZE(resource_values));
            } else {
                /*
                    1. CPUfreq params
                        - hispeed freq for little - 902Mhz
                        - go hispeed load for little - 95
                        - above_hispeed_delay for little - 40ms
                    2. BusDCVS V2 params
                        - Sample_ms of 10ms
                    3. Sched group upmigrate - 500
                 */
                int resource_values[] = {
                        HISPEED_FREQ_LITTLE,        0x386, GO_HISPEED_LOAD_LITTLE, 0x5F,
                        ABOVE_HISPEED_DELAY_LITTLE, 0x4,   CPUBW_HWMON_SAMPLE_MS,  0xA,
                        SCHED_GROUP_UP_MIGRATE,     0x1F4};
                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;
}