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drm: Update documentation and TODO of gem_prime_mmap hook

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The hook gem_prime_mmap in struct drm_driver is deprecated. Document
the new requirements.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20211108102846.309-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-11-08 11:28:46 +01:00
parent 3153c64860
commit 396d9b9a48
2 changed files with 7 additions and 15 deletions
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11
Documentation/gpu/todo.rst
View File

@ -268,17 +268,6 @@ Contact: Daniel Vetter
Level: Intermediate
Clean up mmap forwarding
------------------------
A lot of drivers forward gem mmap calls to dma-buf mmap for imported buffers.
And also a lot of them forward dma-buf mmap to the gem mmap implementations.
There's drm_gem_prime_mmap() for this now, but still needs to be rolled out.
Contact: Daniel Vetter
Level: Intermediate
Generic fbdev defio support
---------------------------

11
include/drm/drm_drv.h
View File

@ -345,11 +345,14 @@ struct drm_driver {
* mmap hook for GEM drivers, used to implement dma-buf mmap in the
* PRIME helpers.
*
* FIXME: There's way too much duplication going on here, and also moved
* to &drm_gem_object_funcs.
* This hook only exists for historical reasons. Drivers must use
* drm_gem_prime_mmap() to implement it.
*
* FIXME: Convert all drivers to implement mmap in struct
* &drm_gem_object_funcs and inline drm_gem_prime_mmap() into
* its callers. This hook should be removed afterwards.
*/
int (*gem_prime_mmap)(struct drm_gem_object *obj,
struct vm_area_struct *vma);
int (*gem_prime_mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);
/**
* @dumb_create: