src/gallium/winsys/vc4/drm/vc4_drm_winsys.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <sys/ioctl.h>
  27
  28 #include "util/os_file.h"
  29
  30 #include "renderonly/renderonly.h"
  31 #include "kmsro/drm/kmsro_drm_public.h"
  32 #include "vc4_drm_public.h"
  33 #include "vc4/vc4_screen.h"
  34 #include "drm-uapi/vc4_drm.h"
  35
  36 struct pipe_screen *
  37 vc4_drm_screen_create(int fd, const struct pipe_screen_config *config)
  38 {
  39    bool v3d_present = true;
  40
  41 #ifndef USE_VC4_SIMULATOR
  42    struct drm_vc4_get_param ident0 = {
  43       .param = DRM_VC4_PARAM_V3D_IDENT0,
  44    };
  45
  46    int ret = ioctl(fd, DRM_IOCTL_VC4_GET_PARAM, &ident0);
  47    v3d_present = ret == 0;
  48 #endif
  49
  50    if (v3d_present)
  51       return vc4_screen_create(os_dupfd_cloexec(fd), NULL);
  52
  53 #ifdef GALLIUM_KMSRO
  54    return kmsro_drm_screen_create(fd, config);
  55 #endif
  56
  57    return NULL;
  58 }
  59
  60 struct pipe_screen *
  61 vc4_drm_screen_create_renderonly(struct renderonly *ro,
  62                                  const struct pipe_screen_config *config)
  63 {
  64    return vc4_screen_create(ro->gpu_fd, ro);
  65 }