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/* * 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 "drmtest.h" /** 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) return 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; /* 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(); } |