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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  * Copyright (C) 2012-2013, 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 <linux/fb.h>
     25 
     26 struct hwc_context_t;
     27 struct msm_hdmi_mode_timing_info;
     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     void setHPD(uint32_t startEnd);
     45     void setActionSafeDimension(int w, int h);
     46     bool isCEUnderscanSupported() { return mUnderscanSupported; }
     47     int configure();
     48     void getAttributes(int& width, int& height);
     49     int teardown();
     50     bool isConnected() {
     51         return  mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].connected;
     52     }
     53 
     54 private:
     55     int getModeCount() const;
     56     void getEDIDModes(int *out) const;
     57     void setEDIDMode(int resMode);
     58     void setSPDInfo(const char* node, const char* property);
     59     void readCEUnderscanInfo();
     60     bool readResolution();
     61     int  parseResolution(char* edidStr, int* edidModes);
     62     void setResolution(int ID);
     63     bool openFrameBuffer();
     64     bool closeFrameBuffer();
     65     bool writeHPDOption(int userOption) const;
     66     bool isValidMode(int ID);
     67     int  getModeOrder(int mode);
     68     int  getUserMode();
     69     int  getBestMode();
     70     bool isInterlacedMode(int mode);
     71     void resetInfo();
     72     void setAttributes();
     73     void getAttrForMode(int& width, int& height, int& fps);
     74 
     75     int mFd;
     76     int mFbNum;
     77     int mCurrentMode;
     78     int mEDIDModes[64];
     79     int mModeCount;
     80     bool mUnderscanSupported;
     81     hwc_context_t *mHwcContext;
     82     fb_var_screeninfo mVInfo;
     83     // Holds all the HDMI modes and timing info supported by driver
     84     msm_hdmi_mode_timing_info* supported_video_mode_lut;
     85 };
     86 
     87 }; //qhwc
     88 // ---------------------------------------------------------------------------
     89 #endif //HWC_EXTERNAL_DISPLAY_H
     90