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
|
/*
* Copyright © 2007 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include "drmtest.h"
#include "i915_drm.h"
#include "intel_chipset.h"
static int
is_intel(int fd)
{
struct drm_i915_getparam gp;
int devid;
gp.param = I915_PARAM_CHIPSET_ID;
gp.value = &devid;
if (ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)))
return 0;
return IS_INTEL(devid);
}
/** Open the first DRM device we can find, searching up to 16 device nodes */
int drm_open_any(void)
{
char name[20];
int i, fd;
for (i = 0; i < 16; i++) {
sprintf(name, "/dev/dri/card%d", i);
fd = open(name, O_RDWR);
if (fd == -1)
continue;
if (is_intel(fd))
return fd;
close(fd);
}
abort();
}
/**
* Open the first DRM device we can find where we end up being the master.
*/
int drm_open_any_master(void)
{
char name[20];
int i, fd;
for (i = 0; i < 16; i++) {
drm_client_t client;
int ret;
sprintf(name, "/dev/dri/card%d", i);
fd = open(name, O_RDWR);
if (fd == -1)
continue;
if (!is_intel(fd)) {
close(fd);
continue;
}
/* Check that we're the only opener and authed. */
client.idx = 0;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
assert (ret == 0);
if (!client.auth) {
close(fd);
continue;
}
client.idx = 1;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
if (ret != -1 || errno != EINVAL) {
close(fd);
continue;
}
return fd;
}
fprintf(stderr, "Couldn't find an un-controlled DRM device\n");
abort();
}
|
