/*
 * Copyright (c) 2015-2016, 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 <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <stdlib.h>

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

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

pthread_mutex_t camera_hint_mutex = PTHREAD_MUTEX_INITIALIZER;
static int display_hint_sent;
static int camera_hint_ref_count;

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

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

    if (video_encode_metadata.state == 1) {
        if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
            /* 1. cpufreq params
             *    -above_hispeed_delay for LVT - 40ms
             *    -go hispeed load for LVT - 95
             *    -hispeed freq for LVT - 556 MHz
             *    -target load for LVT - 90
             *    -above hispeed delay for sLVT - 40ms
             *    -go hispeed load for sLVT - 95
             *    -hispeed freq for sLVT - 806 MHz
             *    -target load for sLVT - 90
             * 2. bus DCVS set to V2 config:
             *    -low power ceil mpbs - 2500
             *    -low power io percent - 50
             * 3. hysteresis optimization
             *    -bus dcvs hysteresis tuning
             *    -sample_ms of 10 ms
             *    -sLVT hispeed freq to 806MHz
             */
            int resource_values[] = {0x41400000, 0x4, 0x41410000, 0x5F, 0x41414000, 0x326,
                0x41420000, 0x5A, 0x41400100, 0x4, 0x41410100, 0x5F, 0x41414100, 0x22C, 0x41420100, 0x5A,
                0x41810000, 0x9C4, 0x41814000, 0x32, 0x4180C000, 0x0, 0x41820000, 0xA};

            pthread_mutex_lock(&camera_hint_mutex);
            camera_hint_ref_count++;
            if (camera_hint_ref_count == 1) {
                perform_hint_action(video_encode_metadata.hint_id,
                        resource_values, sizeof(resource_values)/sizeof(resource_values[0]));
            }
            pthread_mutex_unlock(&camera_hint_mutex);
            ALOGI("Video Encode hint start");
            return HINT_HANDLED;
        }
    } else if (video_encode_metadata.state == 0) {
        if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
                (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
            pthread_mutex_lock(&camera_hint_mutex);
            camera_hint_ref_count--;
            if (!camera_hint_ref_count) {
                undo_hint_action(video_encode_metadata.hint_id);
            }
            pthread_mutex_unlock(&camera_hint_mutex);

            ALOGI("Video Encode hint stop");
            return HINT_HANDLED;
        }
    }
    return HINT_NONE;
}

int power_hint_override(struct power_module *module, 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(struct power_module *module, int on)
{
    return HINT_HANDLED; /* Don't excecute this code path, not in use */
    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 ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
            (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
            int resource_values[] = {}; /* dummy node */
            if (!display_hint_sent) {
                perform_hint_action(DISPLAY_STATE_HINT_ID,
                resource_values, sizeof(resource_values)/sizeof(resource_values[0]));
                display_hint_sent = 1;
                ALOGI("Display Off hint start");
                return HINT_HANDLED;
            }
        }
    } else {
        /* Display on */
        if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
            (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
            undo_hint_action(DISPLAY_STATE_HINT_ID);
            display_hint_sent = 0;
            ALOGI("Display Off hint stop");
            return HINT_HANDLED;
        }
    }
    return HINT_NONE;
}