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 #ifndef ANDROID_DRM_PROPERTY_H_
18 #define ANDROID_DRM_PROPERTY_H_
19 
20 #include <stdint.h>
21 #include <xf86drmMode.h>
22 #include <string>
23 #include <unordered_map>
24 #include <vector>
25 
26 namespace android {
27 
28 enum DrmPropertyType {
29   DRM_PROPERTY_TYPE_INT,
30   DRM_PROPERTY_TYPE_ENUM,
31   DRM_PROPERTY_TYPE_OBJECT,
32   DRM_PROPERTY_TYPE_BLOB,
33   DRM_PROPERTY_TYPE_BITMASK,
34   DRM_PROPERTY_TYPE_INVALID,
35 };
36 
37 class DrmProperty {
38  public:
39   DrmProperty() = default;
40   DrmProperty(drmModePropertyPtr p, uint64_t value);
41   DrmProperty(const DrmProperty &) = delete;
42   DrmProperty &operator=(const DrmProperty &) = delete;
43 
44   void init(drmModePropertyPtr p, uint64_t value);
setName(std::string name)45   void setName(std::string name) { name_ = name; };
46   std::tuple<uint64_t, int> getEnumValueWithName(std::string name) const;
47 
48   uint32_t id() const;
49   std::string name() const;
50 
51   std::tuple<int, uint64_t> value() const;
52   bool isImmutable() const;
53   bool isRange() const;
54   bool isSignedRange() const;
55   bool isBitmask() const;
56 
57   std::tuple<int, uint64_t> rangeMin() const;
58   std::tuple<int, uint64_t> rangeMax() const;
59 
60   bool validateChange(uint64_t value) const;
61   void updateValue(const uint64_t value);
62   void printProperty() const;
63 
64  private:
65   class DrmPropertyEnum {
66    public:
67     DrmPropertyEnum(drm_mode_property_enum *e);
68     ~DrmPropertyEnum();
69 
70     uint64_t value_;
71     std::string name_;
72   };
73 
74   uint32_t id_ = 0;
75 
76   DrmPropertyType type_ = DRM_PROPERTY_TYPE_INVALID;
77   uint32_t flags_ = 0;
78   std::string name_;
79   uint64_t value_ = 0;
80 
81   std::vector<uint64_t> values_;
82   std::vector<DrmPropertyEnum> enums_;
83   std::vector<uint32_t> blob_ids_;
84 };
85 
86 class DrmEnumParser {
87 public:
88     using MapHal2DrmEnum = std::unordered_map<uint32_t, uint64_t>;
89 
90     static std::tuple<uint64_t, int> halToDrmEnum(const uint32_t halData,
91                                                   const MapHal2DrmEnum& drmEnums);
92 
93     static void parseEnums(const DrmProperty &property,
94                            const std::vector<std::pair<uint32_t, const char *>> &enums,
95                            MapHal2DrmEnum& out_enums);
96 };
97 
98 }  // namespace android
99 
100 #endif  // ANDROID_DRM_PROPERTY_H_
101