From 020508b35b2bf6c89d62961eb95e2f81d6381ab5 Mon Sep 17 00:00:00 2001 From: Veeresh Kadasani Date: Mon, 29 Jul 2019 17:07:00 +0900 Subject: [PATCH 2/3] compositor-drm: introduce drm_get_dmafd_from_view This API enables to get dmafd from weston_view Signed-off-by: Veeresh Kadasani --- libweston/compositor-drm.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ libweston/compositor-drm.h | 7 ++++++ 2 files changed, 64 insertions(+) diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c index 26a480c..2b99db5 100644 --- a/libweston/compositor-drm.c +++ b/libweston/compositor-drm.c @@ -5420,6 +5420,62 @@ drm_output_set_seat(struct weston_output *base, } static int +drm_get_dma_fd_from_view(struct weston_output *base, + struct weston_view *ev) +{ + struct drm_backend *b = to_drm_backend(base->compositor); + struct weston_buffer *buffer = ev->surface->buffer_ref.buffer; + struct gbm_bo *bo; + struct drm_fb *current; + struct linux_dmabuf_buffer *dmabuf; + bool is_opaque = drm_view_is_opaque(ev); + uint32_t format; + int fd, ret; + + if(!buffer) { + weston_log("buffer is NULL\n"); + return -1; + } + + if(dmabuf = linux_dmabuf_buffer_get(buffer->resource)) { + current = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque); + if (!current) + { + fprintf(stderr, "failed to get drm_fb from dmabuf\n"); + return -1; + } + } + else if(ev->surface->buffer_ref.buffer->legacy_buffer) { + bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER, + buffer->resource, GBM_BO_USE_SCANOUT); + if (!bo) { + weston_log("failed to get gbm_bo\n"); + return -1; + } + current = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT); + + if (!current) { + weston_log("failed to get drm_fb from bo\n"); + return -1; + } + + } + else { + weston_log("Buffer is not supported\n"); + return -1; + } + + ret = drmPrimeHandleToFD(b->drm.fd, current->handles[0], + DRM_CLOEXEC, &fd); + free(current); + if (ret) { + weston_log("failed to create prime fd for front buffer\n"); + return -1; + } + + return fd; +} +static int drm_output_init_gamma_size(struct drm_output *output) { struct drm_backend *backend = to_drm_backend(output->base.compositor); @@ -6696,6 +6752,7 @@ static const struct weston_drm_output_api api = { drm_output_set_mode, drm_output_set_gbm_format, drm_output_set_seat, + drm_get_dma_fd_from_view, }; static struct drm_backend * diff --git a/libweston/compositor-drm.h b/libweston/compositor-drm.h index 9c37c15..a82a2a9 100644 --- a/libweston/compositor-drm.h +++ b/libweston/compositor-drm.h @@ -78,6 +78,13 @@ struct weston_drm_output_api { */ void (*set_seat)(struct weston_output *output, const char *seat); + + /** Get the dma fd from drm view. + * + * The dma fd is got from weston_view. + * Returns fd on success, -1 on failure. + */ + int (*get_dma_fd_from_view)(struct weston_output *output, struct weston_view *view); }; static inline const struct weston_drm_output_api * -- 2.7.4