power-8998.c

/*
 * Copyright (c) 2016-2017, 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 <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <pthread.h>

#define LOG_TAG "QCOM PowerHAL"
#include <log/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"
#include "powerhintparser.h"

#define CHECK_HANDLE(x) ((x)>0)
#define NUM_PERF_MODES  3

static int current_power_profile = PROFILE_BALANCED;

#ifdef INTERACTION_BOOST
int get_number_of_profiles() {
    return 5;
}
#endif

static int profile_high_performance[] = {
    SCHED_BOOST_ON_V3, 0x1,
    MIN_FREQ_BIG_CORE_0, 0xFFF,
    MIN_FREQ_LITTLE_CORE_0, 0xFFF,
    ALL_CPUS_PWR_CLPS_DIS_V3, 0x1,
};

static int profile_power_save[] = {
    MAX_FREQ_BIG_CORE_0, 0x3E8,
    MAX_FREQ_LITTLE_CORE_0, 0x3E8,
};

static int profile_bias_power[] = {
    MAX_FREQ_BIG_CORE_0, 0x514,
    MAX_FREQ_LITTLE_CORE_0, 0x3E8,
};

static int profile_bias_performance[] = {
    MIN_FREQ_BIG_CORE_0, 0x578,
};

static void set_power_profile(int profile) {

    if (profile == current_power_profile)
        return;

    ALOGV("%s: Profile=%d", __func__, profile);

    if (current_power_profile != PROFILE_BALANCED) {
        undo_hint_action(DEFAULT_PROFILE_HINT_ID);
        ALOGV("%s: Hint undone", __func__);
    }

    if (profile == PROFILE_POWER_SAVE) {
        perform_hint_action(DEFAULT_PROFILE_HINT_ID, profile_power_save,
            ARRAY_SIZE(profile_power_save));
        ALOGD("%s: Set powersave mode", __func__);

    } else if (profile == PROFILE_HIGH_PERFORMANCE) {
        perform_hint_action(DEFAULT_PROFILE_HINT_ID, profile_high_performance,
                ARRAY_SIZE(profile_high_performance));
        ALOGD("%s: Set performance mode", __func__);

    } else if (profile == PROFILE_BIAS_POWER) {
        perform_hint_action(DEFAULT_PROFILE_HINT_ID, profile_bias_power,
            ARRAY_SIZE(profile_bias_power));
        ALOGD("%s: Set bias power mode", __func__);

    } else if (profile == PROFILE_BIAS_PERFORMANCE) {
        perform_hint_action(DEFAULT_PROFILE_HINT_ID, profile_bias_performance,
                ARRAY_SIZE(profile_bias_performance));
        ALOGD("%s: Set bias perf mode", __func__);

    }

    current_power_profile = profile;
}

typedef enum {
    NORMAL_MODE       = 0,
    SUSTAINED_MODE    = 1,
    VR_MODE           = 2,
    VR_SUSTAINED_MODE = (SUSTAINED_MODE|VR_MODE),
    INVALID_MODE      = 0xFF
}perf_mode_type_t;

typedef struct perf_mode {
    perf_mode_type_t type;
    int perf_hint_id;
}perf_mode_t;

perf_mode_t perf_modes[NUM_PERF_MODES] = { { SUSTAINED_MODE, SUSTAINED_PERF_HINT },
                                           { VR_MODE, VR_MODE_HINT },
                                           { VR_SUSTAINED_MODE, VR_MODE_SUSTAINED_PERF_HINT } };

static int current_mode = NORMAL_MODE;

static inline  int get_perfd_hint_id(perf_mode_type_t type) {
    int i;
    for(i=0; i<NUM_PERF_MODES; i++) {
        if (perf_modes[i].type == type) {
            ALOGD("Hint id is 0x%x for mode 0x%x", perf_modes[i].perf_hint_id, type);
            return perf_modes[i].perf_hint_id;
        }
    }
    ALOGD("Couldn't find the hint for mode 0x%x", type);
    return 0;
}

static int switch_mode(perf_mode_type_t mode) {

    int hint_id = 0;
    static int perfd_mode_handle = -1;

    // release existing mode if any
    if (CHECK_HANDLE(perfd_mode_handle)) {
        ALOGD("Releasing handle 0x%x", perfd_mode_handle);
        release_request(perfd_mode_handle);
        perfd_mode_handle = -1;
    }
    // switch to a perf mode
    hint_id = get_perfd_hint_id(mode);
    if(hint_id != 0) {
        perfd_mode_handle = perf_hint_enable(hint_id, 0);
        if (!CHECK_HANDLE(perfd_mode_handle)) {
            ALOGE("Failed perf_hint_interaction for mode: 0x%x", mode);
            return -1;
        }
        ALOGD("Acquired handle 0x%x", perfd_mode_handle);
    }
    return 0;
}

static int process_perf_hint(void *data, perf_mode_type_t mode) {

    // enable
    if (*(int32_t *)data){
        ALOGI("Enable request for mode: 0x%x", mode);
        // check if mode is current mode
        if ( current_mode & mode ) {
            ALOGD("Mode 0x%x already enabled", mode);
            return HINT_HANDLED;
        }
        // enable requested mode
        if ( 0 != switch_mode(current_mode | mode)) {
            ALOGE("Couldn't enable mode 0x%x", mode);
            return HINT_NONE;
        }
        current_mode |= mode;
        ALOGI("Current mode is 0x%x", current_mode);
    // disable
    } else {
        ALOGI("Disable request for mode: 0x%x", mode);
        // check if mode is enabled
        if ( !(current_mode & mode) ) {
            ALOGD("Mode 0x%x already disabled", mode);
            return HINT_HANDLED;
        }
        //disable requested mode
        if ( 0 != switch_mode(current_mode & ~mode)) {
            ALOGE("Couldn't disable mode 0x%x", mode);
            return HINT_NONE;
        }
        current_mode &= ~mode;
        ALOGI("Current mode is 0x%x", current_mode);
    }

    return HINT_HANDLED;
}

static int process_video_encode_hint(void *metadata)
{
    char governor[80];
    struct video_encode_metadata_t video_encode_metadata;
    static int video_encode_handle = 0;

    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;

    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)) {
              video_encode_handle = perf_hint_enable(
                       VIDEO_ENCODE_HINT, 0);
              return HINT_HANDLED;
        }
    } else if (video_encode_metadata.state == 0) {
          if (is_interactive_governor(governor)) {
            release_request(video_encode_handle);
            ALOGI("Video Encode hint stop");
            return HINT_HANDLED;
        }
    }
    return HINT_NONE;
}

int power_hint_override(power_hint_t hint, void *data)
{
    int ret_val = HINT_NONE;

    if (hint == POWER_HINT_SET_PROFILE) {
        set_power_profile(*(int32_t *)data);
        return HINT_HANDLED;
    }

    /* Skip other hints in power save mode */
    if (current_power_profile == PROFILE_POWER_SAVE)
        return HINT_HANDLED;

    switch(hint) {
        case POWER_HINT_VIDEO_ENCODE:
            ret_val = process_video_encode_hint(data);
            break;
        case POWER_HINT_SUSTAINED_PERFORMANCE:
            ret_val = process_perf_hint(data, SUSTAINED_MODE);
            break;
        case POWER_HINT_VR_MODE:
            ret_val = process_perf_hint(data, VR_MODE);
            break;
        case POWER_HINT_INTERACTION:
            if (current_mode != NORMAL_MODE) {
                ret_val = HINT_HANDLED;
            }
            break;
        default:
            break;
    }
    return ret_val;
}

int set_interactive_override(int UNUSED(on))
{
    return HINT_HANDLED; /* Don't excecute this code path, not in use */
}