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gbm: Implement dmabuf import using dumb buffers only

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Split from https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38646

The dmabuf import code will never get called for now,
since the dri backend will not be initialized
if only dumb buffers can be created.

Signed-off-by: stefan11111 <stefan11111@shitposting.expert>
This commit is contained in:
stefan11111 2025-12-17 02:52:56 +02:00
parent dbe71918aa
commit b3f3a097bc
1 changed files with 45 additions and 0 deletions
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45
src/gbm/backends/dri/gbm_dri.c
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@ -676,6 +676,43 @@ gbm_dri_bo_destroy(struct gbm_bo *_bo)
free(bo);
}
static struct gbm_bo *
dumb_bo_from_fd(struct gbm_device *gbm,
struct gbm_import_fd_data *fd_data)
{
#ifdef HAVE_LIBDRM
struct gbm_dri_bo *bo;
int ret;
uint32_t handle;
bo = calloc(1, sizeof *bo);
if (bo == NULL) {
errno = ENOMEM;
return NULL;
}
ret = drmPrimeFDToHandle(gbm->v0.fd, fd_data->fd, &handle);
if (ret) {
free(bo);
return NULL;
}
bo->base.gbm = gbm;
bo->base.v0.width = fd_data->width;
bo->base.v0.height = fd_data->height;
bo->base.v0.stride = fd_data->stride;
bo->base.v0.format = fd_data->format;
bo->base.v0.handle.u32 = handle;
bo->handle = handle;
bo->size = fd_data->stride * fd_data->height;
return &bo->base;
#else
errno = ENOSYS;
return NULL;
#endif
}
static struct gbm_bo *
gbm_dri_bo_import(struct gbm_device *gbm,
uint32_t type, void *buffer, uint32_t usage)
@ -750,6 +787,9 @@ gbm_dri_bo_import(struct gbm_device *gbm,
* the sARGB format. */
fourcc = core->v0.format_canonicalize(fd_data->format);
if (!dri->screen)
return dumb_bo_from_fd(gbm, fd_data);
image = dri2_from_dma_bufs(dri->screen,
fd_data->width,
fd_data->height,
@ -778,6 +818,11 @@ gbm_dri_bo_import(struct gbm_device *gbm,
* the sARGB format. */
fourcc = core->v0.format_canonicalize(fd_data->format);
if (!dri->screen) {
errno = EINVAL;
return NULL;
}
image = dri2_from_dma_bufs(dri->screen, fd_data->width,
fd_data->height, fourcc,
fd_data->modifier,