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7520a277 DV |
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_MODESET_H__ | |
24 | #define __DRM_MODESET_H__ | |
25 | ||
26 | #include <linux/kref.h> | |
27 | struct drm_object_properties; | |
52217195 | 28 | struct drm_property; |
199e4e96 | 29 | struct drm_device; |
7520a277 | 30 | |
a2511a55 DV |
31 | /** |
32 | * struct drm_mode_object - base structure for modeset objects | |
33 | * @id: userspace visible identifier | |
34 | * @type: type of the object, one of DRM_MODE_OBJECT\_\* | |
35 | * @properties: properties attached to this object, including values | |
36 | * @refcount: reference count for objects which with dynamic lifetime | |
37 | * @free_cb: free function callback, only set for objects with dynamic lifetime | |
38 | * | |
39 | * Base structure for modeset objects visible to userspace. Objects can be | |
40 | * looked up using drm_mode_object_find(). Besides basic uapi interface | |
41 | * properties like @id and @type it provides two services: | |
42 | * | |
43 | * - It tracks attached properties and their values. This is used by &drm_crtc, | |
44 | * &drm_plane and &drm_connector. Properties are attached by calling | |
45 | * drm_object_attach_property() before the object is visible to userspace. | |
46 | * | |
47 | * - For objects with dynamic lifetimes (as indicated by a non-NULL @free_cb) it | |
48 | * provides reference counting through drm_mode_object_reference() and | |
49 | * drm_mode_object_unreference(). This is used by &drm_framebuffer, | |
50 | * &drm_connector and &drm_property_blob. These objects provide specialized | |
51 | * reference counting wrappers. | |
52 | */ | |
7520a277 DV |
53 | struct drm_mode_object { |
54 | uint32_t id; | |
55 | uint32_t type; | |
56 | struct drm_object_properties *properties; | |
57 | struct kref refcount; | |
58 | void (*free_cb)(struct kref *kref); | |
59 | }; | |
60 | ||
52217195 | 61 | #define DRM_OBJECT_MAX_PROPERTY 24 |
a2511a55 DV |
62 | /** |
63 | * struct drm_object_properties - property tracking for &drm_mode_object | |
64 | */ | |
52217195 | 65 | struct drm_object_properties { |
a2511a55 DV |
66 | /** |
67 | * @count: number of valid properties, must be less than or equal to | |
68 | * DRM_OBJECT_MAX_PROPERTY. | |
69 | */ | |
70 | ||
f094d881 | 71 | int count; |
a2511a55 DV |
72 | /** |
73 | * @properties: Array of pointers to &drm_property. | |
74 | * | |
75 | * NOTE: if we ever start dynamically destroying properties (ie. | |
52217195 DV |
76 | * not at drm_mode_config_cleanup() time), then we'd have to do |
77 | * a better job of detaching property from mode objects to avoid | |
78 | * dangling property pointers: | |
79 | */ | |
80 | struct drm_property *properties[DRM_OBJECT_MAX_PROPERTY]; | |
a2511a55 DV |
81 | |
82 | /** | |
83 | * @values: Array to store the property values, matching @properties. Do | |
84 | * not read/write values directly, but use | |
85 | * drm_object_property_get_value() and drm_object_property_set_value(). | |
86 | * | |
87 | * Note that atomic drivers do not store mutable properties in this | |
88 | * array, but only the decoded values in the corresponding state | |
89 | * structure. The decoding is done using the ->atomic_get_property and | |
90 | * ->atomic_set_property hooks of the corresponding object. Hence atomic | |
91 | * drivers should not use drm_object_property_set_value() and | |
92 | * drm_object_property_get_value() on mutable objects, i.e. those | |
93 | * without the DRM_MODE_PROP_IMMUTABLE flag set. | |
52217195 DV |
94 | */ |
95 | uint64_t values[DRM_OBJECT_MAX_PROPERTY]; | |
96 | }; | |
97 | ||
98 | /* Avoid boilerplate. I'm tired of typing. */ | |
99 | #define DRM_ENUM_NAME_FN(fnname, list) \ | |
100 | const char *fnname(int val) \ | |
101 | { \ | |
102 | int i; \ | |
103 | for (i = 0; i < ARRAY_SIZE(list); i++) { \ | |
104 | if (list[i].type == val) \ | |
105 | return list[i].name; \ | |
106 | } \ | |
107 | return "(unknown)"; \ | |
108 | } | |
109 | ||
7520a277 DV |
110 | struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, |
111 | uint32_t id, uint32_t type); | |
112 | void drm_mode_object_reference(struct drm_mode_object *obj); | |
113 | void drm_mode_object_unreference(struct drm_mode_object *obj); | |
114 | ||
949619f3 DV |
115 | int drm_object_property_set_value(struct drm_mode_object *obj, |
116 | struct drm_property *property, | |
117 | uint64_t val); | |
118 | int drm_object_property_get_value(struct drm_mode_object *obj, | |
119 | struct drm_property *property, | |
120 | uint64_t *value); | |
121 | ||
122 | void drm_object_attach_property(struct drm_mode_object *obj, | |
123 | struct drm_property *property, | |
124 | uint64_t init_val); | |
7520a277 | 125 | #endif |