Prime export function for gem drivers
int drm_gem_prime_handle_to_fd(struct drm_device * dev, struct drm_file * file_priv, uint32_t handle, uint32_t flags, int * prime_fd);
dev
dev to export the buffer from
file_priv
drm file-private structure
handle
buffer handle to export
flags
flags like DRM_CLOEXEC
prime_fd
pointer to storage for the fd id of the create dma-buf
This is the PRIME export function which must be used mandatorily by GEM drivers to ensure correct lifetime management of the underlying GEM object. The actual exporting from GEM object to a dma-buf is done through the gem_prime_export driver callback.
Jesse Barnes <[email protected]>
Intel Corporation,
Initial version
Laurent Pinchart <[email protected]>
Ideas on board SPRL,
Driver internals
Daniel Vetter <[email protected]>
Intel Corporation,
Contributions all over the place