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diff --git a/power-8998.c b/power-8998.c
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+/*
+ * 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>
+
+#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"
+#include "powerhintparser.h"
+
+#define CHECK_HANDLE(x) ((x)>0)
+#define NUM_PERF_MODES 3
+
+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 pthread_mutex_t perf_mode_switch_lock = PTHREAD_MUTEX_INITIALIZER;
+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) {
+
+ pthread_mutex_lock(&perf_mode_switch_lock);
+
+ // enable
+ if (data){
+ ALOGI("Enable request for mode: 0x%x", mode);
+ // check if mode is current mode
+ if ( current_mode & mode ) {
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ ALOGD("Mode 0x%x already enabled", mode);
+ return HINT_HANDLED;
+ }
+ // enable requested mode
+ if ( 0 != switch_mode(current_mode | mode)) {
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ 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) ) {
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ ALOGD("Mode 0x%x already disabled", mode);
+ return HINT_HANDLED;
+ }
+ //disable requested mode
+ if ( 0 != switch_mode(current_mode & ~mode)) {
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ ALOGE("Couldn't disable mode 0x%x", mode);
+ return HINT_NONE;
+ }
+ current_mode &= ~mode;
+ ALOGI("Current mode is 0x%x", current_mode);
+ }
+
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ 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(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;
+ 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:
+ pthread_mutex_lock(&perf_mode_switch_lock);
+ if (current_mode != NORMAL_MODE) {
+ ret_val = HINT_HANDLED;
+ }
+ pthread_mutex_unlock(&perf_mode_switch_lock);
+ 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 */
+}
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