1 /*
2 * Copyright (C) 2022 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 "HalDisplay.h"
18
19 #include "utils/include/Utils.h"
20
21 #include <aidl/android/hardware/automotive/evs/BufferDesc.h>
22 #include <aidl/android/hardware/automotive/evs/DisplayState.h>
23 #include <aidl/android/hardware/automotive/evs/EvsResult.h>
24 #include <android-base/logging.h>
25 #include <android-base/stringprintf.h>
26
27 #include <cinttypes>
28
29 namespace aidl::android::automotive::evs::implementation {
30
31 using ::aidl::android::hardware::automotive::evs::BufferDesc;
32 using ::aidl::android::hardware::automotive::evs::DisplayDesc;
33 using ::aidl::android::hardware::automotive::evs::DisplayState;
34 using ::aidl::android::hardware::automotive::evs::EvsResult;
35 using ::aidl::android::hardware::automotive::evs::IEvsDisplay;
36 using ::android::base::StringAppendF;
37 using ::ndk::ScopedAStatus;
38
HalDisplay(std::shared_ptr<IEvsDisplay> display,int32_t id)39 HalDisplay::HalDisplay(std::shared_ptr<IEvsDisplay> display, int32_t id) :
40 mHwDisplay(display), mId(id) {
41 // nothing to do.
42 }
43
~HalDisplay()44 HalDisplay::~HalDisplay() {
45 shutdown();
46 }
47
shutdown()48 void HalDisplay::shutdown() {
49 // simply release a shared pointer to remote display object.
50 mHwDisplay.reset();
51 }
52
53 /**
54 * Returns a shared pointer to remote display object.
55 */
getHwDisplay()56 std::shared_ptr<IEvsDisplay> HalDisplay::getHwDisplay() {
57 return mHwDisplay;
58 }
59
60 /**
61 * Gets basic display information from a hardware display object
62 * and returns.
63 */
getDisplayInfo(DisplayDesc * _aidl_return)64 ScopedAStatus HalDisplay::getDisplayInfo(DisplayDesc* _aidl_return) {
65 if (!mHwDisplay) {
66 return Utils::buildScopedAStatusFromEvsResult(EvsResult::RESOURCE_NOT_AVAILABLE);
67 }
68
69 return mHwDisplay->getDisplayInfo(_aidl_return);
70 }
71
72 /**
73 * Gets current display state from a hardware display object and return.
74 */
getDisplayState(DisplayState * _aidl_return)75 ScopedAStatus HalDisplay::getDisplayState(DisplayState* _aidl_return) {
76 if (!mHwDisplay) {
77 return Utils::buildScopedAStatusFromEvsResult(EvsResult::RESOURCE_NOT_AVAILABLE);
78 }
79
80 return mHwDisplay->getDisplayState(_aidl_return);
81 }
82
83 /**
84 * Returns a handle to a frame buffer associated with the display.
85 */
getTargetBuffer(BufferDesc * _aidl_return)86 ScopedAStatus HalDisplay::getTargetBuffer(BufferDesc* _aidl_return) {
87 if (!mHwDisplay) {
88 return Utils::buildScopedAStatusFromEvsResult(EvsResult::RESOURCE_NOT_AVAILABLE);
89 }
90
91 return mHwDisplay->getTargetBuffer(_aidl_return);
92 }
93
94 /**
95 * Notifies the display that the buffer is ready to be used.
96 */
returnTargetBufferForDisplay(const BufferDesc & buffer)97 ScopedAStatus HalDisplay::returnTargetBufferForDisplay(const BufferDesc& buffer) {
98 if (!mHwDisplay) {
99 return Utils::buildScopedAStatusFromEvsResult(EvsResult::RESOURCE_NOT_AVAILABLE);
100 }
101
102 return mHwDisplay->returnTargetBufferForDisplay(buffer);
103 }
104
105 /**
106 * Sets the display state as what the clients wants.
107 */
setDisplayState(DisplayState state)108 ScopedAStatus HalDisplay::setDisplayState(DisplayState state) {
109 if (!mHwDisplay) {
110 return Utils::buildScopedAStatusFromEvsResult(EvsResult::RESOURCE_NOT_AVAILABLE);
111 }
112
113 return mHwDisplay->setDisplayState(state);
114 }
115
toString(const char * indent)116 std::string HalDisplay::toString(const char* indent) {
117 std::string buffer;
118 if (mId == kDisplayIdUnavailable) {
119 // Display identifier has not set
120 StringAppendF(&buffer, "HalDisplay: Display port is unknown.\n");
121 } else {
122 StringAppendF(&buffer, "HalDisplay: Display port %" PRId32 "\n", mId);
123 }
124
125 DisplayDesc displayDesc;
126 auto status = getDisplayInfo(&displayDesc);
127 if (status.isOk()) {
128 StringAppendF(&buffer, "%sWidth: %" PRId32 "\n", indent, displayDesc.width);
129 StringAppendF(&buffer, "%sHeight: %" PRId32 "\n", indent, displayDesc.height);
130 StringAppendF(&buffer, "%sRotation: %" PRId32 "\n", indent,
131 static_cast<int32_t>(displayDesc.orientation));
132 }
133
134 return buffer;
135 }
136
137 } // namespace aidl::android::automotive::evs::implementation
138