150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
/*
|
|
* Copyright (C) Texas Instruments - http://www.ti.com/
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <stdbool.h>
|
|
#include <sys/resource.h>
|
|
#include <pthread.h>
|
|
#include <time.h>
|
|
|
|
#include <cutils/properties.h>
|
|
#include <cutils/log.h>
|
|
#include <utils/Timers.h>
|
|
|
|
#include "hwc_dev.h"
|
|
|
|
static pthread_t vsync_thread;
|
|
static pthread_mutex_t vsync_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
static pthread_cond_t vsync_cond;
|
|
static bool vsync_loop_active = false;
|
|
|
|
nsecs_t vsync_rate;
|
|
|
|
static struct timespec diff(struct timespec start, struct timespec end)
|
|
{
|
|
struct timespec temp;
|
|
if ((end.tv_nsec - start.tv_nsec) < 0) {
|
|
temp.tv_sec = end.tv_sec-start.tv_sec - 1;
|
|
temp.tv_nsec = 1000000000 + end.tv_nsec-start.tv_nsec;
|
|
} else {
|
|
temp.tv_sec = end.tv_sec - start.tv_sec;
|
|
temp.tv_nsec = end.tv_nsec - start.tv_nsec;
|
|
}
|
|
return temp;
|
|
}
|
|
|
|
static void *vsync_loop(void *data)
|
|
{
|
|
struct timespec tp, tp_next, tp_sleep;
|
|
nsecs_t now = 0, period = vsync_rate, next_vsync = 0, next_fake_vsync = 0, sleep = 0;
|
|
omap_hwc_device_t *hwc_dev = (omap_hwc_device_t *)data;
|
|
tp_sleep.tv_sec = tp_sleep.tv_nsec = 0;
|
|
|
|
setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
|
|
|
|
for (;;) {
|
|
pthread_mutex_lock(&vsync_mutex);
|
|
while (!vsync_loop_active) {
|
|
pthread_cond_wait(&vsync_cond, &vsync_mutex);
|
|
}
|
|
/* the vsync_rate should be re-read after
|
|
* user sets the vsync_rate by calling start_sw_vsync
|
|
* explicitly. This is guaranteed by re-reading it
|
|
* after the vsync_cond is signalled.
|
|
*/
|
|
period = vsync_rate; /* re-read rate */
|
|
|
|
pthread_mutex_unlock(&vsync_mutex);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &tp);
|
|
now = (tp.tv_sec * 1000000000) + tp.tv_nsec;
|
|
next_vsync = next_fake_vsync;
|
|
sleep = next_vsync - now;
|
|
if (sleep < 0) {
|
|
/* we missed, find where the next vsync should be */
|
|
sleep = (period - ((now - next_vsync) % period));
|
|
next_vsync = now + sleep;
|
|
}
|
|
next_fake_vsync = next_vsync + period;
|
|
tp_next.tv_sec = (next_vsync / 1000000000);
|
|
tp_next.tv_nsec = (next_vsync % 1000000000);
|
|
tp_sleep = diff(tp, tp_next);
|
|
|
|
nanosleep(&tp_sleep, NULL);
|
|
if (hwc_dev->procs && hwc_dev->procs->vsync) {
|
|
hwc_dev->procs->vsync(hwc_dev->procs, 0, next_vsync);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
bool use_sw_vsync()
|
|
{
|
|
char board[PROPERTY_VALUE_MAX];
|
|
bool rv = false;
|
|
property_get("ro.product.board", board, "");
|
|
if ((strncmp("blaze", board, PROPERTY_VALUE_MAX) == 0) ||
|
|
(strncmp("panda5", board, PROPERTY_VALUE_MAX) == 0)) {
|
|
/* TODO: panda5 really should support h/w vsync */
|
|
rv = true;
|
|
} else {
|
|
char value[PROPERTY_VALUE_MAX];
|
|
property_get("persist.hwc.sw_vsync", value, "0");
|
|
int use_sw_vsync = atoi(value);
|
|
rv = use_sw_vsync > 0;
|
|
}
|
|
ALOGI("Expecting %s vsync for %s", rv ? "s/w" : "h/w", board);
|
|
return rv;
|
|
}
|
|
|
|
void init_sw_vsync(omap_hwc_device_t *hwc_dev)
|
|
{
|
|
pthread_cond_init(&vsync_cond, NULL);
|
|
pthread_create(&vsync_thread, NULL, vsync_loop, (void *)hwc_dev);
|
|
}
|
|
|
|
void start_sw_vsync()
|
|
{
|
|
char refresh_rate[PROPERTY_VALUE_MAX];
|
|
property_get("persist.hwc.sw_vsync_rate", refresh_rate, "60");
|
|
|
|
pthread_mutex_lock(&vsync_mutex);
|
|
int rate = atoi(refresh_rate);
|
|
if (rate <= 0)
|
|
rate = 60;
|
|
vsync_rate = 1000000000 / rate;
|
|
if (vsync_loop_active) {
|
|
pthread_mutex_unlock(&vsync_mutex);
|
|
return;
|
|
}
|
|
vsync_loop_active = true;
|
|
pthread_mutex_unlock(&vsync_mutex);
|
|
pthread_cond_signal(&vsync_cond);
|
|
}
|
|
|
|
void stop_sw_vsync()
|
|
{
|
|
pthread_mutex_lock(&vsync_mutex);
|
|
if (!vsync_loop_active) {
|
|
pthread_mutex_unlock(&vsync_mutex);
|
|
return;
|
|
}
|
|
vsync_loop_active = false;
|
|
pthread_mutex_unlock(&vsync_mutex);
|
|
pthread_cond_signal(&vsync_cond);
|
|
}
|