1 /*
2 * Copyright 2010 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include "igt.h"
25 #include <stdio.h>
26 #include <string.h>
27 #include <stdlib.h>
28
29 #include <sys/stat.h>
30
31 #include "testdisplay.h"
32 #include "config.h"
33
34
35 #include <libudev.h>
36 static struct udev_monitor *uevent_monitor;
37 static struct udev *udev;
38 static GIOChannel *udevchannel;
39
hotplug_event(GIOChannel * source,GIOCondition condition,gpointer data)40 static gboolean hotplug_event(GIOChannel *source, GIOCondition condition,
41 gpointer data)
42 {
43 struct udev_device *dev;
44 dev_t udev_devnum;
45 struct stat s;
46 const char *hotplug;
47
48 dev = udev_monitor_receive_device(uevent_monitor);
49 if (!dev)
50 goto out;
51
52 udev_devnum = udev_device_get_devnum(dev);
53 fstat(drm_fd, &s);
54
55 hotplug = udev_device_get_property_value(dev, "HOTPLUG");
56
57 if (memcmp(&s.st_rdev, &udev_devnum, sizeof(dev_t)) == 0 &&
58 hotplug && atoi(hotplug) == 1)
59 update_display(true);
60
61 udev_device_unref(dev);
62 out:
63 return TRUE;
64 }
65
66
testdisplay_setup_hotplug(void)67 gboolean testdisplay_setup_hotplug(void)
68 {
69 int ret;
70
71 udev = udev_new();
72 if (!udev) {
73 igt_warn("failed to create udev object\n");
74 goto out;
75 }
76
77 uevent_monitor = udev_monitor_new_from_netlink(udev, "udev");
78 if (!uevent_monitor) {
79 igt_warn("failed to create udev event monitor\n");
80 goto out;
81 }
82
83 ret = udev_monitor_filter_add_match_subsystem_devtype(uevent_monitor,
84 "drm",
85 "drm_minor");
86 if (ret < 0) {
87 igt_warn("failed to filter for drm events\n");
88 goto out;
89 }
90
91 ret = udev_monitor_enable_receiving(uevent_monitor);
92 if (ret < 0) {
93 igt_warn("failed to enable udev event reception\n");
94 goto out;
95 }
96
97 udevchannel =
98 g_io_channel_unix_new(udev_monitor_get_fd(uevent_monitor));
99 if (!udevchannel) {
100 igt_warn("failed to create udev GIO channel\n");
101 goto out;
102 }
103
104 ret = g_io_add_watch(udevchannel, G_IO_IN | G_IO_ERR, hotplug_event,
105 udev);
106 if (ret < 0) {
107 igt_warn("failed to add watch on udev GIO channel\n");
108 goto out;
109 }
110
111 return TRUE;
112
113 out:
114 testdisplay_cleanup_hotplug();
115 return FALSE;
116 }
117
testdisplay_cleanup_hotplug(void)118 void testdisplay_cleanup_hotplug(void)
119 {
120 if (udevchannel)
121 g_io_channel_shutdown(udevchannel, TRUE, NULL);
122 if (uevent_monitor)
123 udev_monitor_unref(uevent_monitor);
124 if (udev)
125 udev_unref(udev);
126 }
127