1 /*
2 * Copyright (C) 2019 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 <android-base/logging.h>
20 #include <android-base/stringprintf.h>
21 #include <ui/DisplayMode.h>
22 #include <ui/DisplayState.h>
23
24 #include <inttypes.h>
25
26 using ::android::base::StringAppendF;
27 using ::android::hardware::Return;
28 using ::android::hardware::Void;
29 using ::android::hardware::automotive::evs::V1_0::EvsResult;
30 using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
31 using EvsDisplayState = ::android::hardware::automotive::evs::V1_0::DisplayState;
32 using IEvsDisplay_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsDisplay;
33 using IEvsDisplay_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsDisplay;
34
35 namespace android::automotive::evs::V1_1::implementation {
36
HalDisplay(sp<IEvsDisplay_1_0> display,int32_t id)37 HalDisplay::HalDisplay(sp<IEvsDisplay_1_0> display, int32_t id) : mHwDisplay(display), mId(id) {}
38
~HalDisplay()39 HalDisplay::~HalDisplay() {
40 shutdown();
41 }
42
shutdown()43 void HalDisplay::shutdown() {
44 // simply release a strong pointer to remote display object.
45 mHwDisplay = nullptr;
46 }
47
48 /**
49 * Returns a strong pointer to remote display object.
50 */
getHwDisplay()51 sp<IEvsDisplay_1_0> HalDisplay::getHwDisplay() {
52 return mHwDisplay;
53 }
54
55 /**
56 * Gets basic display information from a hardware display object
57 * and returns.
58 */
getDisplayInfo(getDisplayInfo_cb _hidl_cb)59 Return<void> HalDisplay::getDisplayInfo(getDisplayInfo_cb _hidl_cb) {
60 if (mHwDisplay) {
61 mHwDisplay->getDisplayInfo(_hidl_cb);
62 }
63
64 return Void();
65 }
66
67 /**
68 * Sets the display state as what the clients wants.
69 */
setDisplayState(EvsDisplayState state)70 Return<EvsResult> HalDisplay::setDisplayState(EvsDisplayState state) {
71 if (mHwDisplay) {
72 return mHwDisplay->setDisplayState(state);
73 } else {
74 return EvsResult::UNDERLYING_SERVICE_ERROR;
75 }
76 }
77
78 /**
79 * Gets current display state from a hardware display object and return.
80 */
getDisplayState()81 Return<EvsDisplayState> HalDisplay::getDisplayState() {
82 if (mHwDisplay) {
83 return mHwDisplay->getDisplayState();
84 } else {
85 return EvsDisplayState::DEAD;
86 }
87 }
88
89 /**
90 * Returns a handle to a frame buffer associated with the display.
91 */
getTargetBuffer(getTargetBuffer_cb _hidl_cb)92 Return<void> HalDisplay::getTargetBuffer(getTargetBuffer_cb _hidl_cb) {
93 if (mHwDisplay) {
94 mHwDisplay->getTargetBuffer(_hidl_cb);
95 }
96
97 return Void();
98 }
99
100 /**
101 * Notifies the display that the buffer is ready to be used.
102 */
returnTargetBufferForDisplay(const BufferDesc_1_0 & buffer)103 Return<EvsResult> HalDisplay::returnTargetBufferForDisplay(const BufferDesc_1_0& buffer) {
104 if (mHwDisplay) {
105 return mHwDisplay->returnTargetBufferForDisplay(buffer);
106 } else {
107 return EvsResult::OWNERSHIP_LOST;
108 }
109 }
110
111 /**
112 * Gets basic display information from a hardware display object
113 * and returns.
114 */
getDisplayInfo_1_1(getDisplayInfo_1_1_cb _info_cb)115 Return<void> HalDisplay::getDisplayInfo_1_1(getDisplayInfo_1_1_cb _info_cb) {
116 sp<IEvsDisplay_1_1> display = IEvsDisplay_1_1::castFrom(mHwDisplay).withDefault(nullptr);
117 if (display != nullptr) {
118 display->getDisplayInfo_1_1(_info_cb);
119 }
120
121 return Void();
122 }
123
toString(const char * indent)124 std::string HalDisplay::toString(const char* indent) {
125 std::string buffer;
126 android::ui::DisplayMode displayMode;
127 android::ui::DisplayState displayState;
128
129 if (mId == std::numeric_limits<int32_t>::min()) {
130 // Display identifier has not set
131 StringAppendF(&buffer, "HalDisplay: Display port is unknown.\n");
132 } else {
133 StringAppendF(&buffer, "HalDisplay: Display port %" PRId32 "\n", mId);
134 }
135
136 getDisplayInfo_1_1([&](auto& config, auto& state) {
137 displayMode = *(reinterpret_cast<const android::ui::DisplayMode*>(config.data()));
138 displayState = *(reinterpret_cast<const android::ui::DisplayState*>(state.data()));
139 });
140
141 StringAppendF(&buffer, "%sWidth: %" PRId32 "\n", indent, displayMode.resolution.getWidth());
142 StringAppendF(&buffer, "%sHeight: %" PRId32 "\n", indent, displayMode.resolution.getHeight());
143 StringAppendF(&buffer, "%sRefresh rate: %f\n", indent, displayMode.refreshRate);
144 StringAppendF(&buffer, "%sRotation: %" PRId32 "\n", indent,
145 static_cast<int32_t>(displayState.orientation));
146
147 return buffer;
148 }
149
150 } // namespace android::automotive::evs::V1_1::implementation
151