1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (c) 2016 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef __DRM_MODESET_H__
#define __DRM_MODESET_H__
#include <linux/kref.h>
#include <drm/drm_lease.h>
struct drm_object_properties;
struct drm_property;
struct drm_device;
struct drm_file;
/**
* struct drm_mode_object - base structure for modeset objects
* @id: userspace visible identifier
* @type: type of the object, one of DRM_MODE_OBJECT\_\*
* @properties: properties attached to this object, including values
* @refcount: reference count for objects which with dynamic lifetime
* @free_cb: free function callback, only set for objects with dynamic lifetime
*
* Base structure for modeset objects visible to userspace. Objects can be
* looked up using drm_mode_object_find(). Besides basic uapi interface
* properties like @id and @type it provides two services:
*
* - It tracks attached properties and their values. This is used by &drm_crtc,
* &drm_plane and &drm_connector. Properties are attached by calling
* drm_object_attach_property() before the object is visible to userspace.
*
* - For objects with dynamic lifetimes (as indicated by a non-NULL @free_cb) it
* provides reference counting through drm_mode_object_get() and
* drm_mode_object_put(). This is used by &drm_framebuffer, &drm_connector
* and &drm_property_blob. These objects provide specialized reference
* counting wrappers.
*/
struct drm_mode_object {
uint32_t id;
uint32_t type;
struct drm_object_properties *properties;
struct kref refcount;
void (*free_cb)(struct kref *kref);
};
#define DRM_OBJECT_MAX_PROPERTY 24
/**
* struct drm_object_properties - property tracking for &drm_mode_object
*/
struct drm_object_properties {
/**
* @count: number of valid properties, must be less than or equal to
* DRM_OBJECT_MAX_PROPERTY.
*/
int count;
/**
* @properties: Array of pointers to &drm_property.
*
* NOTE: if we ever start dynamically destroying properties (ie.
* not at drm_mode_config_cleanup() time), then we'd have to do
* a better job of detaching property from mode objects to avoid
* dangling property pointers:
*/
struct drm_property *properties[DRM_OBJECT_MAX_PROPERTY];
/**
* @values: Array to store the property values, matching @properties. Do
* not read/write values directly, but use
* drm_object_property_get_value() and drm_object_property_set_value().
*
* Note that atomic drivers do not store mutable properties in this
* array, but only the decoded values in the corresponding state
* structure. The decoding is done using the &drm_crtc.atomic_get_property and
* &drm_crtc.atomic_set_property hooks for &struct drm_crtc. For
* &struct drm_plane the hooks are &drm_plane_funcs.atomic_get_property and
* &drm_plane_funcs.atomic_set_property. And for &struct drm_connector
* the hooks are &drm_connector_funcs.atomic_get_property and
* &drm_connector_funcs.atomic_set_property .
*
* Hence atomic drivers should not use drm_object_property_set_value()
* and drm_object_property_get_value() on mutable objects, i.e. those
* without the DRM_MODE_PROP_IMMUTABLE flag set.
*/
uint64_t values[DRM_OBJECT_MAX_PROPERTY];
};
/* Avoid boilerplate. I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list) \
const char *fnname(int val) \
{ \
int i; \
for (i = 0; i < ARRAY_SIZE(list); i++) { \
if (list[i].type == val) \
return list[i].name; \
} \
return "(unknown)"; \
}
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
struct drm_file *file_priv,
uint32_t id, uint32_t type);
void drm_mode_object_get(struct drm_mode_object *obj);
void drm_mode_object_put(struct drm_mode_object *obj);
/**
* drm_mode_object_reference - acquire a mode object reference
* @obj: DRM mode object
*
* This is a compatibility alias for drm_mode_object_get() and should not be
* used by new code.
*/
static inline void drm_mode_object_reference(struct drm_mode_object *obj)
{
drm_mode_object_get(obj);
}
/**
* drm_mode_object_unreference - release a mode object reference
* @obj: DRM mode object
*
* This is a compatibility alias for drm_mode_object_put() and should not be
* used by new code.
*/
static inline void drm_mode_object_unreference(struct drm_mode_object *obj)
{
drm_mode_object_put(obj);
}
int drm_object_property_set_value(struct drm_mode_object *obj,
struct drm_property *property,
uint64_t val);
int drm_object_property_get_value(struct drm_mode_object *obj,
struct drm_property *property,
uint64_t *value);
void drm_object_attach_property(struct drm_mode_object *obj,
struct drm_property *property,
uint64_t init_val);
bool drm_mode_object_lease_required(uint32_t type);
#endif
|
