xref: /openbmc/linux/include/drm/drm_blend.h (revision a5ec8332)
1 /*
2  * Copyright (c) 2016 Intel Corporation
3  *
4  * Permission to use, copy, modify, distribute, and sell this software and its
5  * documentation for any purpose is hereby granted without fee, provided that
6  * the above copyright notice appear in all copies and that both that copyright
7  * notice and this permission notice appear in supporting documentation, and
8  * that the name of the copyright holders not be used in advertising or
9  * publicity pertaining to distribution of the software without specific,
10  * written prior permission.  The copyright holders make no representations
11  * about the suitability of this software for any purpose.  It is provided "as
12  * is" without express or implied warranty.
13  *
14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20  * OF THIS SOFTWARE.
21  */
22 
23 #ifndef __DRM_BLEND_H__
24 #define __DRM_BLEND_H__
25 
26 #include <linux/list.h>
27 #include <linux/ctype.h>
28 #include <drm/drm_mode.h>
29 
30 #define DRM_MODE_BLEND_PREMULTI		0
31 #define DRM_MODE_BLEND_COVERAGE		1
32 #define DRM_MODE_BLEND_PIXEL_NONE	2
33 
34 struct drm_device;
35 struct drm_atomic_state;
36 struct drm_plane;
37 
drm_rotation_90_or_270(unsigned int rotation)38 static inline bool drm_rotation_90_or_270(unsigned int rotation)
39 {
40 	return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
41 }
42 
43 #define DRM_BLEND_ALPHA_OPAQUE		0xffff
44 
45 int drm_plane_create_alpha_property(struct drm_plane *plane);
46 int drm_plane_create_rotation_property(struct drm_plane *plane,
47 				       unsigned int rotation,
48 				       unsigned int supported_rotations);
49 unsigned int drm_rotation_simplify(unsigned int rotation,
50 				   unsigned int supported_rotations);
51 
52 int drm_plane_create_zpos_property(struct drm_plane *plane,
53 				   unsigned int zpos,
54 				   unsigned int min, unsigned int max);
55 int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
56 					     unsigned int zpos);
57 int drm_atomic_normalize_zpos(struct drm_device *dev,
58 			      struct drm_atomic_state *state);
59 int drm_plane_create_blend_mode_property(struct drm_plane *plane,
60 					 unsigned int supported_modes);
61 #endif
62