gralloc960/gralloc_vsync_s3cfb.cpp

/*
 * Copyright (C) 2014 ARM Limited. All rights reserved.
 *
 * Copyright (C) 2008 The Android Open Source Project
 *
 * 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 "gralloc_priv.h"
#include "gralloc_vsync.h"
#include "gralloc_vsync_report.h"
#include <sys/ioctl.h>
#include <errno.h>

#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
#define S3CFB_SET_VSYNC_INT _IOW('F', 206, unsigned int)

int gralloc_vsync_enable(framebuffer_device_t *dev)
{
	private_module_t *m = reinterpret_cast<private_module_t *>(dev->common.module);
	int interrupt = 1;

	if (ioctl(m->framebuffer->fd, S3CFB_SET_VSYNC_INT, &interrupt) < 0)
	{
		return -errno;
	}

	return 0;
}

int gralloc_vsync_disable(framebuffer_device_t *dev)
{
	private_module_t *m = reinterpret_cast<private_module_t *>(dev->common.module);
	int interrupt = 0;

	if (ioctl(m->framebuffer->fd, S3CFB_SET_VSYNC_INT, &interrupt) < 0)
	{
		return -errno;
	}

	return 0;
}

int gralloc_wait_for_vsync(framebuffer_device_t *dev)
{
	private_module_t *m = reinterpret_cast<private_module_t *>(dev->common.module);

	if (m->swapInterval)
	{
		int crtc = 0;
		gralloc_mali_vsync_report(MALI_VSYNC_EVENT_BEGIN_WAIT);

		if (ioctl(m->framebuffer->fd, FBIO_WAITFORVSYNC, &crtc) < 0)
		{
			gralloc_mali_vsync_report(MALI_VSYNC_EVENT_END_WAIT);
			return -errno;
		}

		gralloc_mali_vsync_report(MALI_VSYNC_EVENT_END_WAIT);
	}

	return 0;
}