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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  * Copyright (C) 2012, The Linux Foundation. All rights reserved.
      4  *
      5  * Not a Contribution, Apache license notifications and license are
      6  * retained for attribution purposes only.
      7 
      8  * Licensed under the Apache License, Version 2.0 (the "License");
      9  * you may not use this file except in compliance with the License.
     10  * You may obtain a copy of the License at
     11  *
     12  *      http://www.apache.org/licenses/LICENSE-2.0
     13  *
     14  * Unless required by applicable law or agreed to in writing, software
     15  * distributed under the License is distributed on an "AS IS" BASIS,
     16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     17  * See the License for the specific language governing permissions and
     18  * limitations under the License.
     19  */
     20 
     21 #ifndef HWC_EXTERNAL_DISPLAY_H
     22 #define HWC_EXTERNAL_DISPLAY_H
     23 
     24 #include <utils/threads.h>
     25 #include <linux/fb.h>
     26 
     27 struct hwc_context_t;
     28 
     29 namespace qhwc {
     30 
     31 //Type of scanning of EDID(Video Capability Data Block)
     32 enum external_scansupport_type {
     33     EXT_SCAN_NOT_SUPPORTED      = 0,
     34     EXT_SCAN_ALWAYS_OVERSCANED  = 1,
     35     EXT_SCAN_ALWAYS_UNDERSCANED = 2,
     36     EXT_SCAN_BOTH_SUPPORTED     = 3
     37 };
     38 
     39 class ExternalDisplay
     40 {
     41 public:
     42     ExternalDisplay(hwc_context_t* ctx);
     43     ~ExternalDisplay();
     44     int getModeCount() const;
     45     void getEDIDModes(int *out) const;
     46     bool isCEUnderscanSupported() { return mUnderscanSupported; }
     47     void setExternalDisplay(bool connected, int extFbNum = 0);
     48     bool isExternalConnected() { return mConnected;};
     49     void  setExtDpyNum(int extDpyNum) { mExtDpyNum = extDpyNum;};
     50     void setHPD(uint32_t startEnd);
     51     void setEDIDMode(int resMode);
     52     void setActionSafeDimension(int w, int h);
     53     void processUEventOnline(const char *str);
     54     void processUEventOffline(const char *str);
     55 
     56 private:
     57     void readCEUnderscanInfo();
     58     bool readResolution();
     59     int  parseResolution(char* edidStr, int* edidModes);
     60     void setResolution(int ID);
     61     bool openFrameBuffer(int fbNum);
     62     bool closeFrameBuffer();
     63     bool writeHPDOption(int userOption) const;
     64     bool isValidMode(int ID);
     65     void handleUEvent(char* str, int len);
     66     int  getModeOrder(int mode);
     67     int  getUserMode();
     68     int  getBestMode();
     69     bool isInterlacedMode(int mode);
     70     void resetInfo();
     71     void setDpyHdmiAttr();
     72     void setDpyWfdAttr();
     73     void getAttrForMode(int& width, int& height, int& fps);
     74     void updateExtDispDevFbIndex();
     75     int  configureHDMIDisplay();
     76     int  configureWFDDisplay();
     77     int  teardownHDMIDisplay();
     78     int  teardownWFDDisplay();
     79     int  getExtFbNum(int &fbNum);
     80 
     81     mutable android::Mutex mExtDispLock;
     82     int mFd;
     83     int mCurrentMode;
     84     int mConnected;
     85     int mConnectedFbNum;
     86     int mResolutionMode;
     87     char mEDIDs[128];
     88     int mEDIDModes[64];
     89     int mModeCount;
     90     bool mUnderscanSupported;
     91     hwc_context_t *mHwcContext;
     92     fb_var_screeninfo mVInfo;
     93     int mHdmiFbNum;
     94     int mWfdFbNum;
     95     int mExtDpyNum;
     96 };
     97 
     98 }; //qhwc
     99 // ---------------------------------------------------------------------------
    100 #endif //HWC_EXTERNAL_DISPLAY_H
    101