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

   1 From 2cb25adac6b968104bbfb276c684506607dfbff4 Mon Sep 17 00:00:00 2001
   2 From: Veeresh Kadasani <external.vkadasani@jp.adit-jv.com>
   3 Date: Wed, 7 Aug 2019 21:05:11 +0900
   4 Subject: [PATCH 1/1] 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 | 59 ++++++++++++++++++++++++++++++++++++++++++++++
  11  libweston/compositor-drm.h |  7 ++++++
  12  2 files changed, 66 insertions(+)
  13
  14 diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
  15 index b83459a..98ad85c 100644
  16 --- a/libweston/compositor-drm.c
  17 +++ b/libweston/compositor-drm.c
  18 @@ -5848,6 +5848,64 @@ drm_output_set_seat(struct weston_output *base,
  19                                      seat ? seat : "");
  20  }
  21
  22 + static int
  23 +drm_get_dma_fd_from_view(struct weston_output *base,
  24 +                          struct weston_view *ev, int *buf_stride)
  25 +{
  26 +       struct drm_backend *b = to_drm_backend(base->compositor);
  27 +       struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
  28 +       struct gbm_bo *bo;
  29 +       struct drm_fb *current;
  30 +       struct linux_dmabuf_buffer *dmabuf;
  31 +       bool is_opaque = weston_view_is_opaque(ev,&ev->transform.boundingbox);
  32 +       uint32_t format;
  33 +       int fd, ret;
  34 +
  35 +       if(!buffer) {
  36 +               weston_log("buffer is NULL\n");
  37 +               return -1;
  38 +       }
  39 +
  40 +       if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) {
  41 +               current = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
  42 +               if (!current)
  43 +               {
  44 +                       fprintf(stderr, "failed to get drm_fb from dmabuf\n");
  45 +                       return -1;
  46 +               }
  47 +               *buf_stride=current->strides[0];
  48 +       }
  49 +       else if(ev->surface->buffer_ref.buffer->legacy_buffer) {
  50 +               bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
  51 +                                  buffer->resource, GBM_BO_USE_SCANOUT);
  52 +               if (!bo) {
  53 +                       weston_log("failed to get gbm_bo\n");
  54 +                       return -1;
  55 +               }
  56 +               current = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
  57 +
  58 +               if (!current) {
  59 +                       weston_log("failed to get drm_fb from bo\n");
  60 +                       return -1;
  61 +               }
  62 +                *buf_stride=current->strides[0];
  63 +       }
  64 +       else {
  65 +               weston_log("Buffer is not supported\n");
  66 +               return -1;
  67 +       }
  68 +
  69 +       ret = drmPrimeHandleToFD(b->drm.fd, current->handles[0],
  70 +                                DRM_CLOEXEC, &fd);
  71 +       free(current);
  72 +       if (ret) {
  73 +               weston_log("failed to create prime fd for front buffer\n");
  74 +               return -1;
  75 +       }
  76 +
  77 +       return fd;
  78 +}
  79 +
  80  static int
  81  drm_output_init_gamma_size(struct drm_output *output)
  82  {
  83 @@ -7396,6 +7454,7 @@ static const struct weston_drm_output_api api = {
  84         drm_output_set_mode,
  85         drm_output_set_gbm_format,
  86         drm_output_set_seat,
  87 +       drm_get_dma_fd_from_view
  88  };
  89
  90  static const struct weston_drm_virtual_output_api virt_api = {
  91 diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h
  92 index 71a306f..a9379e4 100644
  93 --- a/libweston/compositor-drm.h
  94 +++ b/libweston/compositor-drm.h
  95 @@ -78,6 +78,13 @@ struct weston_drm_output_api {
  96          */
  97         void (*set_seat)(struct weston_output *output,
  98                          const char *seat);
  99 +
 100 +       /** Get the dma fd from drm view.
 101 +        *
 102 +        *  The dma fd is got from weston_view.
 103 +        *  Returns fd on success, -1 on failure.
 104 +        */
 105 +       int (*get_dma_fd_from_view)(struct weston_output *output, struct weston_view *view, int *buf_stride);
 106  };
 107
 108  static inline const struct weston_drm_output_api *
 109 --
 110 2.7.4
 111