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      1 /*
      2 * Copyright (c) 2015 - 2016, The Linux Foundation. All rights reserved.
      3 *
      4 * Redistribution and use in source and binary forms, with or without modification, are permitted
      5 * provided that the following conditions are met:
      6 *    * Redistributions of source code must retain the above copyright notice, this list of
      7 *      conditions and the following disclaimer.
      8 *    * Redistributions in binary form must reproduce the above copyright notice, this list of
      9 *      conditions and the following disclaimer in the documentation and/or other materials provided
     10 *      with the distribution.
     11 *    * Neither the name of The Linux Foundation nor the names of its contributors may be used to
     12 *      endorse or promote products derived from this software without specific prior written
     13 *      permission.
     14 *
     15 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     17 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
     18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     21 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     22 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23 */
     24 
     25 #ifndef __HW_EVENTS_H__
     26 #define __HW_EVENTS_H__
     27 
     28 #include <sys/poll.h>
     29 #include <string>
     30 #include <vector>
     31 #include <map>
     32 #include <utility>
     33 
     34 #include "hw_interface.h"
     35 #include "hw_events_interface.h"
     36 
     37 namespace sdm {
     38 
     39 using std::vector;
     40 
     41 class HWEvents : public HWEventsInterface {
     42  public:
     43   DisplayError Init(int fb_num, HWEventHandler *event_handler,
     44                     vector<const char *> *event_list);
     45   DisplayError Deinit();
     46 
     47  private:
     48   static const int kMaxStringLength = 1024;
     49 
     50   typedef void (HWEvents::*EventParser)(char *);
     51 
     52   struct HWEventData {
     53     const char* event_name = NULL;
     54     EventParser event_parser = NULL;
     55   };
     56 
     57   static void* DisplayEventThread(void *context);
     58   void* DisplayEventHandler();
     59   void HandleVSync(char *data);
     60   void HandleBlank(char *data) { }
     61   void HandleIdleTimeout(char *data);
     62   void HandleThermal(char *data);
     63   void HandleCECMessage(char *data);
     64   void HandleThreadExit(char *data) { }
     65   void PopulateHWEventData();
     66   DisplayError SetEventParser(const char *event_name, HWEventData *event_data);
     67   pollfd InitializePollFd(HWEventData *event_data);
     68 
     69   HWEventHandler *event_handler_ = NULL;
     70   vector<const char *> *event_list_ = NULL;
     71   vector<HWEventData> event_data_list_ = {};
     72   vector<pollfd> poll_fds_;
     73   pthread_t event_thread_;
     74   std::string event_thread_name_ = "SDM_EventThread";
     75   bool exit_threads_ = false;
     76   const char* fb_path_ = "/sys/devices/virtual/graphics/fb";
     77   int fb_num_ = -1;
     78   int exit_fd_ = -1;
     79 };
     80 
     81 }  // namespace sdm
     82 
     83 #endif  // __HW_EVENTS_H__
     84 
     85