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drm: Add GEM backed framebuffer library

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This library provides helpers for drivers that don't subclass
drm_framebuffer and are backed by drm_gem_object. The code is
taken from drm_fb_cma_helper.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/1502631125-13557-2-git-send-email-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes
2017-08-13 15:31:44 +02:00
parent d956e1293b
commit 4c3dbb2c31
5 changed files with 337 additions and 1 deletions
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7
include/drm/drm_framebuffer.h
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@@ -190,6 +190,13 @@ struct drm_framebuffer {
* @filp_head: Placed on &drm_file.fbs, protected by &drm_file.fbs_lock.
*/
struct list_head filp_head;
/**
* @obj: GEM objects backing the framebuffer, one per plane (optional).
*
* This is used by the GEM framebuffer helpers, see e.g.
* drm_gem_fb_create().
*/
struct drm_gem_object *obj[4];
};
#define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)