meta-agl-profile-graphical/recipes-graphics/wayland/weston/0019-compositor-drm-introduce-drm_get_dmafd_from_view.patch

   1 From 3dbffb783f44752ec221a2ee7a94a21934d681a2 Mon Sep 17 00:00:00 2001
   2 From: Wataru Mizuno <wmizuno@jp.adit-jv.com>
   3 Date: Tue, 10 Apr 2018 12:22:07 +0900
   4 Subject: [PATCH 5/5] compositor-drm: introduce drm_get_dmafd_from_view
   5
   6 This API enables to get dmafd from weston_view
   7
   8 Signed-off-by: Wataru Mizuno <wmizuno@jp.adit-jv.com>
   9 ---
  10  libweston/compositor-drm.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++
  11  libweston/compositor-drm.h |  7 ++++
  12  2 files changed, 87 insertions(+)
  13
  14 diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
  15 index 0b5b4c4..77f2ece 100644
  16 --- a/libweston/compositor-drm.c
  17 +++ b/libweston/compositor-drm.c
  18 @@ -2430,6 +2430,85 @@ drm_output_set_seat(struct weston_output *base,
  19  }
  20
  21  static int
  22 +drm_get_dma_fd_from_view(struct weston_output *base,
  23 +                          struct weston_view *ev)
  24 +{
  25 +       struct drm_backend *b = to_drm_backend(base->compositor);
  26 +       struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
  27 +       struct gbm_bo *bo;
  28 +       struct drm_fb *current;
  29 +       struct linux_dmabuf_buffer *dmabuf;
  30 +       uint32_t format;
  31 +       int fd, ret;
  32 +
  33 +       if(!buffer) {
  34 +               weston_log("buffer is NULL\n");
  35 +               return -1;
  36 +       }
  37 +
  38 +       if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) {
  39 +               struct gbm_import_fd_data gbm_dmabuf = {
  40 +                       .fd     = dmabuf->attributes.fd[0],
  41 +                       .width  = dmabuf->attributes.width,
  42 +                       .height = dmabuf->attributes.height,
  43 +                       .stride = dmabuf->attributes.stride[0],
  44 +                       .format = dmabuf->attributes.format
  45 +               };
  46 +
  47 +               bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_FD,
  48 +                                  &gbm_dmabuf, GBM_BO_USE_SCANOUT);
  49 +               if (!bo) {
  50 +                       weston_log("failed to get gbm_bo\n");
  51 +                       return -1;
  52 +               }
  53 +
  54 +               current = zalloc(sizeof *current);
  55 +               current->handle = gbm_bo_get_handle(bo).s32;
  56 +               if (!current->handle) {
  57 +                       fprintf(stderr, "failed to get drm_handle\n");
  58 +                       return -1;
  59 +               }
  60 +       }
  61 +       else if(ev->surface->buffer_ref.buffer->legacy_buffer) {
  62 +               bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
  63 +                                  buffer->resource, GBM_BO_USE_SCANOUT);
  64 +
  65 +               if (!bo) {
  66 +                       weston_log("failed to get gbm_bo\n");
  67 +                       return -1;
  68 +               }
  69 +
  70 +               format = gbm_bo_get_format(bo);
  71 +               if (!format) {
  72 +                       weston_log("failed to get format\n");
  73 +                       gbm_bo_destroy(bo);
  74 +                       return -1;
  75 +               }
  76 +
  77 +               current = drm_fb_get_from_bo(bo, b, format);
  78 +               if (!current) {
  79 +                       weston_log("failed to get drm_fb\n");
  80 +                       gbm_bo_destroy(bo);
  81 +                       return -1;
  82 +               }
  83 +       }
  84 +       else {
  85 +               weston_log("Buffer is not supported\n");
  86 +               return -1;
  87 +       }
  88 +
  89 +       ret = drmPrimeHandleToFD(b->drm.fd, current->handle,
  90 +                                DRM_CLOEXEC, &fd);
  91 +       free(current);
  92 +       if (ret) {
  93 +               weston_log("failed to create prime fd for front buffer\n");
  94 +               return -1;
  95 +       }
  96 +
  97 +       return fd;
  98 +}
  99 +
 100 +static int
 101  drm_output_enable(struct weston_output *base)
 102  {
 103         struct drm_output *output = to_drm_output(base);
 104 @@ -3199,6 +3278,7 @@ static const struct weston_drm_output_api api = {
 105         drm_output_set_mode,
 106         drm_output_set_gbm_format,
 107         drm_output_set_seat,
 108 +       drm_get_dma_fd_from_view,
 109  };
 110
 111  static struct drm_backend *
 112 diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h
 113 index 2e2995a..fe00bd5 100644
 114 --- a/libweston/compositor-drm.h
 115 +++ b/libweston/compositor-drm.h
 116 @@ -78,6 +78,13 @@ struct weston_drm_output_api {
 117          */
 118         void (*set_seat)(struct weston_output *output,
 119                          const char *seat);
 120 +
 121 +       /** Get the dma fd from drm view.
 122 +        *
 123 +         *  The dma fd is got from weston_view.
 124 +        *  Returns fd on success, -1 on failure.
 125 +        */
 126 +       int (*get_dma_fd_from_view)(struct weston_output *output, struct weston_view *view);
 127  };
 128
 129  static inline const struct weston_drm_output_api *
 130 --
 131 2.7.4
 132