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 // NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
18 #define LOG_TAG "hwc-drm-property"
19
20 #include "DrmProperty.h"
21
22 #include <xf86drmMode.h>
23
24 #include <cerrno>
25 #include <cstdint>
26 #include <string>
27
28 #include "DrmDevice.h"
29 #include "utils/log.h"
30
31 namespace android {
32
DrmPropertyEnum(drm_mode_property_enum * e)33 DrmProperty::DrmPropertyEnum::DrmPropertyEnum(drm_mode_property_enum *e)
34 : value(e->value), name(e->name) {
35 }
36
DrmProperty(uint32_t obj_id,drmModePropertyPtr p,uint64_t value)37 DrmProperty::DrmProperty(uint32_t obj_id, drmModePropertyPtr p,
38 uint64_t value) {
39 Init(obj_id, p, value);
40 }
41
Init(uint32_t obj_id,drmModePropertyPtr p,uint64_t value)42 void DrmProperty::Init(uint32_t obj_id, drmModePropertyPtr p, uint64_t value) {
43 obj_id_ = obj_id;
44 id_ = p->prop_id;
45 flags_ = p->flags;
46 name_ = p->name;
47 value_ = value;
48
49 for (int i = 0; i < p->count_values; ++i)
50 // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic):
51 values_.emplace_back(p->values[i]);
52
53 for (int i = 0; i < p->count_enums; ++i)
54 // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic):
55 enums_.emplace_back(&p->enums[i]);
56
57 for (int i = 0; i < p->count_blobs; ++i)
58 // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic):
59 blob_ids_.emplace_back(p->blob_ids[i]);
60 }
61
GetValue() const62 std::optional<uint64_t> DrmProperty::GetValue() const {
63 if ((flags_ & DRM_MODE_PROP_BLOB) != 0)
64 return value_;
65
66 if (values_.empty())
67 return {};
68
69 if ((flags_ & DRM_MODE_PROP_RANGE) != 0)
70 return value_;
71
72 if ((flags_ & DRM_MODE_PROP_ENUM) != 0) {
73 if (value_ >= enums_.size())
74 return {};
75
76 return enums_[value_].value;
77 }
78
79 if ((flags_ & DRM_MODE_PROP_OBJECT) != 0)
80 return value_;
81
82 return {};
83 }
84
RangeMin() const85 std::tuple<int, uint64_t> DrmProperty::RangeMin() const {
86 if (!IsRange())
87 return std::make_tuple(-EINVAL, 0);
88 if (values_.empty())
89 return std::make_tuple(-ENOENT, 0);
90
91 return std::make_tuple(0, values_[0]);
92 }
93
RangeMax() const94 std::tuple<int, uint64_t> DrmProperty::RangeMax() const {
95 if (!IsRange())
96 return std::make_tuple(-EINVAL, 0);
97 if (values_.size() < 2)
98 return std::make_tuple(-ENOENT, 0);
99
100 return std::make_tuple(0, values_[1]);
101 }
102
GetEnumValueWithName(const std::string & name) const103 std::tuple<uint64_t, int> DrmProperty::GetEnumValueWithName(
104 const std::string &name) const {
105 for (const auto &it : enums_) {
106 if (it.name == name) {
107 return std::make_tuple(it.value, 0);
108 }
109 }
110
111 return std::make_tuple(UINT64_MAX, -EINVAL);
112 }
113
AtomicSet(drmModeAtomicReq & pset,uint64_t value) const114 auto DrmProperty::AtomicSet(drmModeAtomicReq &pset, uint64_t value) const
115 -> bool {
116 if (id_ == 0) {
117 ALOGE("AtomicSet() is called on non-initialized property!");
118 return false;
119 }
120 if (drmModeAtomicAddProperty(&pset, obj_id_, id_, value) < 0) {
121 ALOGE("Failed to add obj_id: %u, prop_id: %u (%s) to pset", obj_id_, id_,
122 name_.c_str());
123 return false;
124 }
125 return true;
126 }
127
128 } // namespace android
129