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    Subject[PATCH 2/3] drm/prime: Wire up mmap_info support
    Date
    From: Rob Clark <robdclark@chromium.org>

    Just plumbing the thing thru an extra layer.

    Signed-off-by: Rob Clark <robdclark@chromium.org>
    ---
    drivers/gpu/drm/drm_prime.c | 12 ++++++++++++
    include/drm/drm_drv.h | 7 +++++++
    2 files changed, 19 insertions(+)

    diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
    index e3f09f18110c..f58586e131c5 100644
    --- a/drivers/gpu/drm/drm_prime.c
    +++ b/drivers/gpu/drm/drm_prime.c
    @@ -784,6 +784,17 @@ int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
    }
    EXPORT_SYMBOL(drm_gem_dmabuf_mmap);

    +static int drm_gem_dmabuf_mmap_info(struct dma_buf *dma_buf)
    +{
    + struct drm_gem_object *obj = dma_buf->priv;
    + struct drm_device *dev = obj->dev;
    +
    + if (!dev->driver->gem_prime_mmap_info)
    + return -ENOSYS;
    +
    + return dev->driver->gem_prime_mmap_info(obj);
    +}
    +
    static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
    .cache_sgt_mapping = true,
    .attach = drm_gem_map_attach,
    @@ -792,6 +803,7 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
    .unmap_dma_buf = drm_gem_unmap_dma_buf,
    .release = drm_gem_dmabuf_release,
    .mmap = drm_gem_dmabuf_mmap,
    + .mmap_info = drm_gem_dmabuf_mmap_info,
    .vmap = drm_gem_dmabuf_vmap,
    .vunmap = drm_gem_dmabuf_vunmap,
    };
    diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
    index f6159acb8856..797c0f8c2dd0 100644
    --- a/include/drm/drm_drv.h
    +++ b/include/drm/drm_drv.h
    @@ -355,6 +355,13 @@ struct drm_driver {
    */
    int (*gem_prime_mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);

    + /**
    + * @gem_prim_mmap_info:
    + *
    + * Get info about mmap setup by gem_prime_mmap. See dma_buf_ops:mmap_info.
    + */
    + int (*gem_prime_mmap_info)(struct drm_gem_object *obj);
    +
    /**
    * @dumb_create:
    *
    --
    2.36.1
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