2 * Copyright © 2007 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
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
18 * THE 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
24 * Eric Anholt <eric@anholt.net>
32 /** Open the first DRM device we can find, searching up to 16 device nodes */
33 int drm_open_any(void)
38 for (i = 0; i < 16; i++) {
39 sprintf(name, "/dev/dri/card%d", i);
40 fd = open(name, O_RDWR);
49 * Open the first DRM device we can find where we end up being the master.
51 int drm_open_any_master(void)
56 for (i = 0; i < 16; i++) {
60 sprintf(name, "/dev/dri/card%d", i);
61 fd = open(name, O_RDWR);
65 /* Check that we're the only opener and authed. */
67 ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
74 ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
75 if (ret != -1 || errno != EINVAL) {
81 fprintf(stderr, "Couldn't find an un-controlled DRM device\n");