1 /*
2  * Copyright (C) 2014-2017 ARM Limited. All rights reserved.
3  *
4  * Copyright (C) 2008 The Android Open Source Project
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * You may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  *      http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 #include <sys/ioctl.h>
20 #include <errno.h>
21 
22 #include <hardware/hardware.h>
23 #include <hardware/fb.h>
24 
25 #if GRALLOC_USE_GRALLOC1_API == 1
26 #include <hardware/gralloc1.h>
27 #else
28 #include <hardware/gralloc.h>
29 #endif
30 
31 #include "mali_gralloc_module.h"
32 #include "mali_gralloc_private_interface_types.h"
33 #include "mali_gralloc_buffer.h"
34 #include "gralloc_vsync.h"
35 #include "gralloc_vsync_report.h"
36 
37 #define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
38 
gralloc_vsync_enable(framebuffer_device_t * dev)39 int gralloc_vsync_enable(framebuffer_device_t *dev)
40 {
41 	GRALLOC_UNUSED(dev);
42 	return 0;
43 }
44 
gralloc_vsync_disable(framebuffer_device_t * dev)45 int gralloc_vsync_disable(framebuffer_device_t *dev)
46 {
47 	GRALLOC_UNUSED(dev);
48 	return 0;
49 }
50 
gralloc_wait_for_vsync(framebuffer_device_t * dev)51 int gralloc_wait_for_vsync(framebuffer_device_t *dev)
52 {
53 	private_module_t *m = reinterpret_cast<private_module_t *>(dev->common.module);
54 
55 	if (MALI_DPY_TYPE_CLCD == m->dpy_type || MALI_DPY_TYPE_HDLCD == m->dpy_type)
56 	{
57 		/* Silently ignore wait for vsync as neither PL111 nor HDLCD implement this IOCTL. */
58 		return 0;
59 	}
60 
61 	if (m->swapInterval)
62 	{
63 		int crtc = 0;
64 		gralloc_mali_vsync_report(MALI_VSYNC_EVENT_BEGIN_WAIT);
65 
66 		if (ioctl(m->framebuffer->fd, FBIO_WAITFORVSYNC, &crtc) < 0)
67 		{
68 			gralloc_mali_vsync_report(MALI_VSYNC_EVENT_END_WAIT);
69 			return -errno;
70 		}
71 
72 		gralloc_mali_vsync_report(MALI_VSYNC_EVENT_END_WAIT);
73 	}
74 
75 	return 0;
76 }
77