src/gallium/winsys/kmsro/drm/kmsro_drm_winsys.c

   1 /*
   2  * Copyright (C) 2016 Christian Gmeiner <christian.gmeiner@gmail.com>
   3  * Copyright (C) 2017 Broadcom
   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 (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27
  28 #include "kmsro_drm_public.h"
  29 #include "vc4/drm/vc4_drm_public.h"
  30 #include "xf86drm.h"
  31
  32 #include "pipe/p_screen.h"
  33 #include "renderonly/renderonly.h"
  34
  35 struct pipe_screen *kmsro_drm_screen_create(int fd)
  36 {
  37    struct renderonly ro = {
  38       /* Passes the vc4-allocated BO through to the KMS-only DRM device using
  39        * PRIME buffer sharing.  The VC4 BO must be linear, which the SCANOUT
  40        * flag on allocation will have ensured.
  41        */
  42       .create_for_resource = renderonly_create_gpu_import_for_resource,
  43       .kms_fd = fd,
  44       .gpu_fd = drmOpenWithType("vc4", NULL, DRM_NODE_RENDER),
  45    };
  46
  47    if (ro.gpu_fd < 0)
  48       return NULL;
  49
  50    struct pipe_screen *screen = vc4_drm_screen_create_renderonly(&ro);
  51    if (!screen)
  52       close(ro.gpu_fd);
  53
  54    return screen;
  55 }