1 /*
2 * Copyright (C) 2021–2022 Beijing OSWare Technology Co., Ltd
3 * This file contains confidential and proprietary information of
4 * OSWare Technology Co., Ltd
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 #include "fb_device.h"
20 #include <cerrno>
21 #include <fcntl.h>
22 #include <memory>
23 #include <securec.h>
24 #include <string>
25 #include "display_common.h"
26 #include "fb_display.h"
27 #include "display_adapter.h"
28 namespace OHOS {
29 namespace HDI {
30 namespace DISPLAY {
Create()31 std::shared_ptr<HdiDeviceInterface> FbDevice::Create()
32 {
33 constexpr const char *FBDEV_PATH = "/dev/graphics/fb0";
34 std::unique_ptr<DisplayAdapter>& adapter = DisplayAdapter::GetInstance();
35 if (adapter == nullptr) {
36 DISPLAY_LOGE("can not get display adapter the fbdevice need it");
37 return nullptr;
38 }
39 int fd = adapter->OpenDevice(FBDEV_PATH, O_RDWR, 0);
40 if (fd < 0) {
41 DISPLAY_LOGE("failed to open fbdev %{public}s", FBDEV_PATH);
42 return nullptr;
43 }
44
45 auto device = std::make_shared<FbDevice>(fd);
46 return device;
47 }
48
FbDevice(int fd)49 FbDevice::FbDevice(int fd)
50 {
51 DISPLAY_LOGD();
52 deviceFd_ = fd;
53 }
54
~FbDevice()55 FbDevice::~FbDevice()
56 {
57 DISPLAY_LOGD();
58 if (deviceFd_ > 0) {
59 close(deviceFd_);
60 deviceFd_ = -1;
61 }
62 }
63
DiscoveryDisplay()64 std::unordered_map<uint32_t, std::shared_ptr<HdiDisplay>> FbDevice::DiscoveryDisplay()
65 {
66 DISPLAY_LOGD();
67 return displays_;
68 }
69
Init()70 int32_t FbDevice::Init()
71 {
72 DISPLAY_LOGD();
73 std::vector<int> fds = {deviceFd_};
74 std::shared_ptr<HdiDisplay> display = std::make_shared<FbDisplay>(fds);
75 int ret = display->Init();
76 DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("display init failed"));
77 displays_.emplace(display->GetId(), std::move(display));
78 return DISPLAY_SUCCESS;
79 }
80
DeInit()81 void FbDevice::DeInit()
82 {
83 DISPLAY_LOGD();
84 displays_.clear();
85 }
86 } // namespace DISPLAY
87 } // namespace HDI
88 } // namespace OHOS
89