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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 "drmdevice.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() const73 std::tuple<int, uint64_t> DrmProperty::value() const {
74   if (type_ == DRM_PROPERTY_TYPE_BLOB)
75     return std::make_tuple(0, value_);
76 
77   if (values_.size() == 0)
78     return std::make_tuple(-ENOENT, 0);
79 
80   switch (type_) {
81     case DRM_PROPERTY_TYPE_INT:
82       return std::make_tuple(0, value_);
83 
84     case DRM_PROPERTY_TYPE_ENUM:
85       if (value_ >= enums_.size())
86         return std::make_tuple(-ENOENT, 0);
87 
88       return std::make_tuple(0, enums_[value_].value_);
89 
90     case DRM_PROPERTY_TYPE_OBJECT:
91       return std::make_tuple(0, value_);
92 
93     default:
94       return std::make_tuple(-EINVAL, 0);
95   }
96 }
97 
is_immutable() const98 bool DrmProperty::is_immutable() const {
99   return id_ && (flags_ & DRM_MODE_PROP_IMMUTABLE);
100 }
101 
is_range() const102 bool DrmProperty::is_range() const {
103   return id_ && (flags_ & DRM_MODE_PROP_RANGE);
104 }
105 
range_min() const106 std::tuple<int, uint64_t> DrmProperty::range_min() const {
107   if (!is_range())
108     return std::make_tuple(-EINVAL, 0);
109   if (values_.size() < 1)
110     return std::make_tuple(-ENOENT, 0);
111 
112   return std::make_tuple(0, values_[0]);
113 }
114 
range_max() const115 std::tuple<int, uint64_t> DrmProperty::range_max() const {
116   if (!is_range())
117     return std::make_tuple(-EINVAL, 0);
118   if (values_.size() < 2)
119     return std::make_tuple(-ENOENT, 0);
120 
121   return std::make_tuple(0, values_[1]);
122 }
123 
GetEnumValueWithName(std::string name) const124 std::tuple<uint64_t, int> DrmProperty::GetEnumValueWithName(
125     std::string name) const {
126   for (auto it : enums_) {
127     if (it.name_.compare(name) == 0) {
128       return std::make_tuple(it.value_, 0);
129     }
130   }
131 
132   return std::make_tuple(UINT64_MAX, -EINVAL);
133 }
134 }  // namespace android
135