1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_gem.h>
#include <drm/drm_crtc_helper.h>
#include "vkms_drv.h"
#define DRIVER_NAME "vkms"
#define DRIVER_DESC "Virtual Kernel Mode Setting"
#define DRIVER_DATE "20180514"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
static struct vkms_device *vkms_device;
static const struct file_operations vkms_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = drm_gem_mmap,
.unlocked_ioctl = drm_ioctl,
.compat_ioctl = drm_compat_ioctl,
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.release = drm_release,
};
static void vkms_release(struct drm_device *dev)
{
struct vkms_device *vkms = container_of(dev, struct vkms_device, drm);
platform_device_unregister(vkms->platform);
drm_mode_config_cleanup(&vkms->drm);
drm_dev_fini(&vkms->drm);
}
static struct drm_driver vkms_driver = {
.driver_features = DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
.release = vkms_release,
.fops = &vkms_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
static const u32 vkms_formats[] = {
DRM_FORMAT_XRGB8888,
};
static void vkms_connector_destroy(struct drm_connector *connector)
{
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
static const struct drm_connector_funcs vkms_connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = vkms_connector_destroy,
};
static int __init vkms_init(void)
{
int ret;
vkms_device = kzalloc(sizeof(*vkms_device), GFP_KERNEL);
if (!vkms_device)
return -ENOMEM;
ret = drm_dev_init(&vkms_device->drm, &vkms_driver, NULL);
if (ret)
goto out_free;
vkms_device->platform =
platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
if (IS_ERR(vkms_device->platform)) {
ret = PTR_ERR(vkms_device->platform);
goto out_fini;
}
drm_mode_config_init(&vkms_device->drm);
ret = drm_connector_init(&vkms_device->drm, &vkms_device->connector,
&vkms_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret < 0) {
DRM_ERROR("Failed to init connector\n");
goto out_unregister;
}
ret = drm_simple_display_pipe_init(&vkms_device->drm,
&vkms_device->pipe,
NULL,
vkms_formats,
ARRAY_SIZE(vkms_formats),
NULL,
&vkms_device->connector);
if (ret < 0) {
DRM_ERROR("Cannot setup simple display pipe\n");
goto out_unregister;
}
ret = drm_dev_register(&vkms_device->drm, 0);
if (ret)
goto out_unregister;
drm_connector_register(&vkms_device->connector);
return 0;
out_unregister:
platform_device_unregister(vkms_device->platform);
out_fini:
drm_dev_fini(&vkms_device->drm);
out_free:
kfree(vkms_device);
return ret;
}
static void __exit vkms_exit(void)
{
if (!vkms_device) {
DRM_INFO("vkms_device is NULL.\n");
return;
}
drm_dev_unregister(&vkms_device->drm);
drm_dev_put(&vkms_device->drm);
kfree(vkms_device);
}
module_init(vkms_init);
module_exit(vkms_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
|
