Eric Anholt | d7cf298 | 2007-07-19 04:59:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2007 Intel Corporation |
| 3 | * |
| 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: |
| 10 | * |
| 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 |
| 13 | * 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 |
| 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 |
| 21 | * IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Eric Anholt <eric@anholt.net> |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <fcntl.h> |
Eric Anholt | 8c741ed | 2008-04-23 13:06:58 -0700 | [diff] [blame] | 29 | #include <sys/stat.h> |
Eric Anholt | d7cf298 | 2007-07-19 04:59:59 -0700 | [diff] [blame] | 30 | #include "drmtest.h" |
| 31 | |
| 32 | /** Open the first DRM device we can find, searching up to 16 device nodes */ |
| 33 | int drm_open_any(void) |
| 34 | { |
| 35 | char name[20]; |
| 36 | int i, fd; |
| 37 | |
| 38 | for (i = 0; i < 16; i++) { |
| 39 | sprintf(name, "/dev/dri/card%d", i); |
| 40 | fd = open(name, O_RDWR); |
| 41 | if (fd != -1) |
| 42 | return fd; |
| 43 | } |
| 44 | abort(); |
| 45 | } |
| 46 | |
Eric Anholt | ecf3fbe | 2007-07-19 06:17:04 -0700 | [diff] [blame] | 47 | |
| 48 | /** |
| 49 | * Open the first DRM device we can find where we end up being the master. |
| 50 | */ |
| 51 | int drm_open_any_master(void) |
| 52 | { |
| 53 | char name[20]; |
| 54 | int i, fd; |
| 55 | |
| 56 | for (i = 0; i < 16; i++) { |
| 57 | drm_client_t client; |
| 58 | int ret; |
| 59 | |
| 60 | sprintf(name, "/dev/dri/card%d", i); |
| 61 | fd = open(name, O_RDWR); |
| 62 | if (fd == -1) |
| 63 | continue; |
| 64 | |
| 65 | /* Check that we're the only opener and authed. */ |
| 66 | client.idx = 0; |
| 67 | ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client); |
| 68 | assert (ret == 0); |
| 69 | if (!client.auth) { |
| 70 | close(fd); |
| 71 | continue; |
| 72 | } |
| 73 | client.idx = 1; |
| 74 | ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client); |
| 75 | if (ret != -1 || errno != EINVAL) { |
| 76 | close(fd); |
| 77 | continue; |
| 78 | } |
| 79 | return fd; |
| 80 | } |
| 81 | fprintf(stderr, "Couldn't find an un-controlled DRM device\n"); |
| 82 | abort(); |
| 83 | } |