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1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "drmproperty.h"
18 #include "drmresources.h"
19 
20 #include <errno.h>
21 #include <stdint.h>
22 #include <string>
23 
24 #include <xf86drmMode.h>
25 
26 namespace android {
27 
DrmPropertyEnum(drm_mode_property_enum * e)28 DrmProperty::DrmPropertyEnum::DrmPropertyEnum(drm_mode_property_enum *e)
29     : value_(e->value), name_(e->name) {
30 }
31 
~DrmPropertyEnum()32 DrmProperty::DrmPropertyEnum::~DrmPropertyEnum() {
33 }
34 
DrmProperty(drmModePropertyPtr p,uint64_t value)35 DrmProperty::DrmProperty(drmModePropertyPtr p, uint64_t value)
36     : id_(0), type_(DRM_PROPERTY_TYPE_INVALID), flags_(0), name_("") {
37   Init(p, value);
38 }
39 
Init(drmModePropertyPtr p,uint64_t value)40 void DrmProperty::Init(drmModePropertyPtr p, uint64_t value) {
41   id_ = p->prop_id;
42   flags_ = p->flags;
43   name_ = p->name;
44   value_ = value;
45 
46   for (int i = 0; i < p->count_values; ++i)
47     values_.push_back(p->values[i]);
48 
49   for (int i = 0; i < p->count_enums; ++i)
50     enums_.push_back(DrmPropertyEnum(&p->enums[i]));
51 
52   for (int i = 0; i < p->count_blobs; ++i)
53     blob_ids_.push_back(p->blob_ids[i]);
54 
55   if (flags_ & DRM_MODE_PROP_RANGE)
56     type_ = DRM_PROPERTY_TYPE_INT;
57   else if (flags_ & DRM_MODE_PROP_ENUM)
58     type_ = DRM_PROPERTY_TYPE_ENUM;
59   else if (flags_ & DRM_MODE_PROP_OBJECT)
60     type_ = DRM_PROPERTY_TYPE_OBJECT;
61   else if (flags_ & DRM_MODE_PROP_BLOB)
62     type_ = DRM_PROPERTY_TYPE_BLOB;
63 }
64 
id() const65 uint32_t DrmProperty::id() const {
66   return id_;
67 }
68 
name() const69 std::string DrmProperty::name() const {
70   return name_;
71 }
72 
value(uint64_t * value) const73 int DrmProperty::value(uint64_t *value) const {
74   if (type_ == DRM_PROPERTY_TYPE_BLOB) {
75     *value = value_;
76     return 0;
77   }
78 
79   if (values_.size() == 0)
80     return -ENOENT;
81 
82   switch (type_) {
83     case DRM_PROPERTY_TYPE_INT:
84       *value = value_;
85       return 0;
86 
87     case DRM_PROPERTY_TYPE_ENUM:
88       if (value_ >= enums_.size())
89         return -ENOENT;
90 
91       *value = enums_[value_].value_;
92       return 0;
93 
94     case DRM_PROPERTY_TYPE_OBJECT:
95       *value = value_;
96       return 0;
97 
98     default:
99       return -EINVAL;
100   }
101 }
102 }
103