tools/tdm_test_client.c

   1 /**************************************************************************
   2  *
   3  * libtdm
   4  *
   5  * Copyright 2015 Samsung Electronics co., Ltd. All Rights Reserved.
   6  *
   7  * Contact: Eunchul Kim <chulspro.kim@samsung.com>,
   8  *          JinYoung Jeon <jy0.jeon@samsung.com>,
   9  *          Taeheon Kim <th908.kim@samsung.com>,
  10  *          YoungJun Cho <yj44.cho@samsung.com>,
  11  *          SooChan Lim <sc1.lim@samsung.com>,
  12  *          Boram Park <sc1.lim@samsung.com>
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the
  16  * "Software"), to deal in the Software without restriction, including
  17  * without limitation the rights to use, copy, modify, merge, publish,
  18  * distribute, sub license, and/or sell copies of the Software, and to
  19  * permit persons to whom the Software is furnished to do so, subject to
  20  * the following conditions:
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  27  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  29  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  30  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  31  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  32  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33  *
  34 **************************************************************************/
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <poll.h>
  39 #include <errno.h>
  40 #include <time.h>
  41 #include <stdint.h>
  42
  43 #include <tdm_client.h>
  44 #include <tdm_helper.h>
  45
  46 static int
  47 get_time_in_micros(void)
  48 {
  49         struct timespec tp;
  50
  51         if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
  52                 return (int)(tp.tv_sec * 1000000) + (tp.tv_nsec / 1000L);
  53
  54         return 0;
  55 }
  56
  57 static void
  58 _client_vblank_handler(unsigned int sequence, unsigned int tv_sec,
  59                                            unsigned int tv_usec, void *user_data)
  60 {
  61         int client, vblank;
  62         static int prev = 0;
  63
  64         client = get_time_in_micros();
  65         vblank = tv_sec * 1000000 + tv_usec;
  66
  67         if (vblank - prev > 16966 || vblank - prev < 16366) /* +0.3 ~ -0.3 ms */
  68                 printf("vblank              : %d us\n", vblank - prev);
  69
  70         if (client - vblank > 2000) /* 2ms */
  71                 printf("kernel -> tdm-client: %d us\n", client - vblank);
  72
  73         prev = vblank;
  74 }
  75
  76
  77 int
  78 main(int argc, char *argv[])
  79 {
  80         tdm_client *client;
  81         tdm_client_error error;
  82         int fd = -1;
  83         struct pollfd fds;
  84         int sync;
  85
  86         if (argc < 2) {
  87                 printf("Usage: %s\n", argv[0]);
  88                 printf("\t%s 0 : non-sync\n", argv[0]);
  89                 printf("\t%s 1 : sync\n", argv[0]);
  90                 exit(1);
  91         }
  92
  93         sync = atoi(argv[1]);
  94
  95         client = tdm_client_create(&error);
  96         if (error != TDM_CLIENT_ERROR_NONE) {
  97                 printf("tdm_client_create failed\n");
  98                 exit(1);
  99         }
 100
 101         error = tdm_client_get_fd(client, &fd);
 102         if (error != TDM_CLIENT_ERROR_NONE || fd < 0) {
 103                 printf("tdm_client_get_fd failed\n");
 104                 goto done;
 105         }
 106
 107         fds.events = POLLIN;
 108         fds.fd = fd;
 109         fds.revents = 0;
 110
 111         while (1) {
 112                 int ret;
 113
 114                 error = tdm_client_wait_vblank(client, "unknown-0", 1, 1, sync,
 115                                                                            _client_vblank_handler, NULL);
 116                 if (error != TDM_CLIENT_ERROR_NONE) {
 117                         printf("tdm_client_wait_vblank failed\n");
 118                         goto done;
 119                 }
 120
 121                 if (!sync) {
 122                         ret = poll(&fds, 1, -1);
 123                         if (ret < 0) {
 124                                 if (errno == EBUSY)  /* normal case */
 125                                         continue;
 126                                 else {
 127                                         printf("poll failed: %m\n");
 128                                         goto done;
 129                                 }
 130                         }
 131
 132                         error = tdm_client_handle_events(client);
 133                         if (error != TDM_CLIENT_ERROR_NONE)
 134                                 printf("tdm_client_handle_events failed\n");
 135                 }
 136         }
 137
 138 done:
 139         tdm_client_destroy(client);
 140         return 0;
 141 }