1 /*
2  * Copyright (c) 2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef FBDEV_DRIVER_H
17 #define FBDEV_DRIVER_H
18 
19 #include "display_drv.h"
20 #include "nocopyable.h"
21 #include <cstdint>
22 #include <linux/fb.h>
23 #include <string>
24 
25 namespace OHOS {
26 namespace PowerMgr {
27 struct FbBufferObject {
28     uint32_t width {};
29     uint32_t height {};
30     uint32_t size {};
31     void* vaddr {};
32 };
33 
34 class FbdevDriver : public DisplayDrv {
35     DISALLOW_COPY_AND_MOVE(FbdevDriver);
36     using FbBlankHook = std::function<void(int, bool)>;
37 
38 public:
39     FbdevDriver() = default;
40     ~FbdevDriver() override;
41     bool Init() override;
42     void Flip(const uint8_t* buf) override;
43     void GetDisplayInfo(DisplayInfo& dsInfo) override;
44     void Blank(bool blank) override;
45     void Exit() override;
46     static void SetDevPath(const std::string& devPath);
47     static void RegisterBlankHook(FbBlankHook blankHook);
48 
49 private:
50     void ReleaseFb(const struct FbBufferObject* fbo);
51     struct FbBufferObject buff_ {};
52     struct fb_fix_screeninfo finfo_ {};
53     struct fb_var_screeninfo vinfo_ {};
54     bool FbPowerContrl(int fd, bool powerOn);
55     static inline std::string devPath_ = FB_DEV_PATH;
56     static inline FbBlankHook blankHook_ {};
57 };
58 } // namespace PowerMgr
59 } // namespace OHOS
60 #endif
61