power-8974.c

/*
 * Copyright (c) 2013, 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"

static int display_hint_sent;
static int display_hint2_sent;
static int first_display_off_hint;

/**
 * If target is 8974pro:
 *     return true
 * else:
 *     return false
 */
static bool is_target_8974pro(void)
{
    int fd;
    bool is_target_8974pro = false;
    char buf[10] = {0};

    fd = open("/sys/devices/soc0/soc_id", O_RDONLY);
    if (fd >= 0) {
        if (read(fd, buf, sizeof(buf) - 1) == -1) {
            ALOGW("Unable to read soc_id");
            is_target_8974pro = false;
        } else {
            int soc_id = atoi(buf);
            if (soc_id == 194 || (soc_id >= 208 && soc_id <= 218)) {
                is_target_8974pro = true;
            }
        }
    }
    close(fd);
    return is_target_8974pro;
}

int set_interactive_override(struct power_module *module, 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. */
        /*
         * We need to be able to identify the first display off hint
         * and release the current lock holder
         */
        if (is_target_8974pro()) {
            if (!first_display_off_hint) {
                undo_initial_hint_action();
                first_display_off_hint = 1;
            }
            /* used for all subsequent toggles to the display */
            if (!display_hint2_sent) {
                undo_hint_action(DISPLAY_STATE_HINT_ID_2);
                display_hint2_sent = 1;
            }
        }

        if ((strncmp(governor, ONDEMAND_GOVERNOR, strlen(ONDEMAND_GOVERNOR)) == 0) &&
                (strlen(governor) == strlen(ONDEMAND_GOVERNOR))) {
            int resource_values[] = {MS_500, SYNC_FREQ_600, OPTIMAL_FREQ_600, THREAD_MIGRATION_SYNC_OFF};

            if (!display_hint_sent) {
                perform_hint_action(DISPLAY_STATE_HINT_ID,
                        resource_values, sizeof(resource_values)/sizeof(resource_values[0]));
                display_hint_sent = 1;
            }

            return HINT_HANDLED;
        }
    } else {
        /* Display on */
        if (is_target_8974pro() && display_hint2_sent) {
            int resource_values2[] = {CPUS_ONLINE_MIN_2};
            perform_hint_action(DISPLAY_STATE_HINT_ID_2,
                    resource_values2, sizeof(resource_values2)/sizeof(resource_values2[0]));
            display_hint2_sent = 0;
        }

        if ((strncmp(governor, ONDEMAND_GOVERNOR, strlen(ONDEMAND_GOVERNOR)) == 0) &&
                (strlen(governor) == strlen(ONDEMAND_GOVERNOR))) {
            undo_hint_action(DISPLAY_STATE_HINT_ID);
            display_hint_sent = 0;

            return HINT_HANDLED;
        }
    }

    return HINT_NONE;
}