meta-agl-profile-graphical/recipes-graphics/wayland/weston/0003-compositor-drm-introduce-drm_get_dmafd_from_view.patch

   1 From 6bed527fe0a4101ef214abaf2cd82609b6c510e4 Mon Sep 17 00:00:00 2001
   2 From: Veeresh Kadasani <external.vkadasani@jp.adit-jv.com>
   3 Date: Tue, 30 Jul 2019 20:25:34 +0900
   4 Subject: [PATCH 2/2] compositor-drm: introduce drm_get_dmafd_from_view
   5
   6 This API enables to get dmafd from weston_view
   7
   8 Signed-off-by: Veeresh Kadasani <external.vkadasani@jp.adit-jv.com>
   9 ---
  10  libweston/compositor-drm.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++
  11  libweston/compositor-drm.h |  7 ++++++
  12  2 files changed, 65 insertions(+)
  13
  14 diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
  15 index b83459a..5cabfb5 100644
  16 --- a/libweston/compositor-drm.c
  17 +++ b/libweston/compositor-drm.c
  18 @@ -5849,6 +5849,64 @@ 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, int *buf_stride)
  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 +       bool is_opaque = drm_view_is_opaque(ev);
  31 +       uint32_t format;
  32 +       int fd, ret;
  33 +
  34 +       if(!buffer) {
  35 +               weston_log("buffer is NULL\n");
  36 +               return -1;
  37 +       }
  38 +
  39 +       if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) {
  40 +               current = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
  41 +               if (!current)
  42 +               {
  43 +                       fprintf(stderr, "failed to get drm_fb from dmabuf\n");
  44 +                       return -1;
  45 +               }
  46 +               *buf_stride=current->strides[0];
  47 +       }
  48 +       else if(ev->surface->buffer_ref.buffer->legacy_buffer) {
  49 +               bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
  50 +                                  buffer->resource, GBM_BO_USE_SCANOUT);
  51 +               if (!bo) {
  52 +                       weston_log("failed to get gbm_bo\n");
  53 +                       return -1;
  54 +               }
  55 +               current = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
  56 +
  57 +               if (!current) {
  58 +                       weston_log("failed to get drm_fb from bo\n");
  59 +                       return -1;
  60 +               }
  61 +                *buf_stride=current->strides[0];
  62 +       }
  63 +       else {
  64 +               weston_log("Buffer is not supported\n");
  65 +               return -1;
  66 +       }
  67 +
  68 +       ret = drmPrimeHandleToFD(b->drm.fd, current->handles[0],
  69 +                                DRM_CLOEXEC, &fd);
  70 +       free(current);
  71 +       if (ret) {
  72 +               weston_log("failed to create prime fd for front buffer\n");
  73 +               return -1;
  74 +       }
  75 +
  76 +       return fd;
  77 +}
  78 +
  79 +static int
  80  drm_output_init_gamma_size(struct drm_output *output)
  81  {
  82         struct drm_backend *backend = to_drm_backend(output->base.compositor);
  83 diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h
  84 index 71a306f..4f985d3 100644
  85 --- a/libweston/compositor-drm.h
  86 +++ b/libweston/compositor-drm.h
  87 @@ -78,6 +78,13 @@ struct weston_drm_output_api {
  88          */
  89         void (*set_seat)(struct weston_output *output,
  90                          const char *seat);
  91 +
  92 +        /** Get the dma fd from drm view.
  93 +        *
  94 +         *  The dma fd is got from weston_view.
  95 +        *  Returns fd on success, -1 on failure.
  96 +        */
  97 +       int (*get_dma_fd_from_view)(struct weston_output *output, struct weston_view *view, int *buf_stride);
  98  };
  99
 100  static inline const struct weston_drm_output_api *
 101 --
 102 2.7.4
 103