src/tdm_vblank.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 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include "tdm.h"
  41 #include "tdm_private.h"
  42 #include "tdm_list.h"
  43
  44 /* CAUTION:
  45  * Basically tdm vblank doesn't care about thread things.
  46  * However, to use tdm_event_loop_xxx functions, have to use the internal function.
  47  * So need to lock/unlock the mutex of private_display. And valid_vblank_list and
  48  * valid_wait_list should be protected by valid_list_lock because tdm_vblank can
  49  * be used in multi-thread.
  50  */
  51
  52 /* TDM vblank
  53  * - aligned by HW vblank
  54  * - use a tdm_event_loop_source object only.
  55  */
  56
  57 #define TDM_VBLANK_DEFAULT_VREFRESH    30
  58
  59 /* We expact "(unsigned int)(0.0016667 / 0.0016667) = 1". But it becomes 0. */
  60 #define TDM_TIME_MARGIN     0.0000001
  61
  62 #define TDM_VBLANK_UINT_MAX 4294967295U
  63 #define TDM_VBLANK_UINT_1Q  1073741823U     /* UINT_MAX / 4 */
  64 #define TDM_VBLANK_UINT_3Q  3221225471U     /* UINT_MAX / 4 * 3 */
  65
  66 /* (seq < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < last_seq) means
  67  * that the sequence value has reached the max value and started from 0 again.
  68  */
  69 #define TDM_VBLANK_SEQ_REACHED_MAX(seq, last_seq) \
  70         ((seq) < TDM_VBLANK_UINT_1Q && TDM_VBLANK_UINT_3Q < (last_seq))
  71
  72 #define VER(fmt, arg...)   TDM_ERR("[%p] "fmt, private_vblank, ##arg)
  73 #define VWR(fmt, arg...)   TDM_WRN("[%p] "fmt, private_vblank, ##arg)
  74 #define VIN(fmt, arg...)   do { if (tdm_debug_module & TDM_DEBUG_VBLANK) TDM_INFO("[%p] "fmt, private_vblank, ##arg); } while (0)
  75 #define VDB(fmt, arg...)   do { if (tdm_debug_module & TDM_DEBUG_VBLANK) TDM_DBG("[%p] "fmt, private_vblank, ##arg); } while (0)
  76
  77 typedef enum {
  78         VBLANK_TYPE_SW,
  79         VBLANK_TYPE_SW_FAKE,
  80         VBLANK_TYPE_HW,
  81         VBLANK_TYPE_HW_SW,
  82 } tdm_vblank_wait_type;
  83
  84 typedef enum {
  85         VBLANK_EVENT_TYPE_NONE,
  86         VBLANK_EVENT_TYPE_SW,
  87         VBLANK_EVENT_TYPE_HW,
  88 } tdm_vblank_event_type;
  89
  90 typedef struct _tdm_vblank_wait_info tdm_vblank_wait_info;
  91
  92 typedef struct _tdm_private_vblank {
  93         struct list_head valid_link;
  94
  95         double stamp;
  96         pid_t owner_tid;
  97
  98         tdm_display *dpy;
  99         tdm_output *output;
 100         tdm_output_conn_status connection;
 101         unsigned int vrefresh;
 102
 103         tdm_vblank_event_type last_type;
 104         unsigned int check_HW_or_SW;
 105         char name[TDM_NAME_LEN];
 106         unsigned int fps;
 107         unsigned int fps_changeable;
 108         int offset;
 109         unsigned int enable_fake;
 110         unsigned int ignore_global_fps;
 111
 112         double vblank_gap;
 113         unsigned int quotient;
 114
 115         unsigned int last_seq;
 116         double last_time;
 117
 118         unsigned int add_front;
 119         struct wl_resource *resource;
 120
 121         /* for HW */
 122         double HW_vblank_gap;
 123         struct list_head HW_wait_list;
 124
 125         /* for SW */
 126         tdm_event_loop_source *SW_timer;
 127         struct list_head SW_wait_list;
 128 } tdm_private_vblank;
 129
 130 struct _tdm_vblank_wait_info {
 131         struct list_head link;
 132         struct list_head valid_link;
 133
 134         double stamp;
 135
 136         double req_time;
 137         unsigned int interval;
 138
 139         tdm_vblank_handler func;
 140         void *user_data;
 141         tdm_private_vblank *private_vblank;
 142
 143         tdm_vblank_wait_type type;
 144
 145         double target_time;
 146         unsigned int target_seq;
 147 };
 148
 149 /* valid_vblank_list and valid_wait_list should be protected by valid_list_lock because
 150  * tdm_vblank can be used in multi-thread.
 151  */
 152 static pthread_mutex_t valid_list_lock;
 153 static struct list_head valid_vblank_list;
 154 static struct list_head valid_wait_list;
 155 static unsigned int vblank_list_inited;
 156 static unsigned int vblank_global_fps;
 157 static double stamp = 0;
 158
 159 static tdm_error _tdm_vblank_cb_vblank_SW(void *user_data);
 160 static tdm_error _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info);
 161 static void _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
 162                                                                          unsigned int tv_sec, unsigned int tv_usec,
 163                                                                          void *user_data);
 164
 165 #if 0
 166 static void
 167 _print_list(struct list_head *list)
 168 {
 169         tdm_vblank_wait_info *w = NULL;
 170
 171         LIST_FOR_EACH_ENTRY(w, list, link) {
 172                 printf(" %d", w->interval);
 173         }
 174         printf("\n");
 175 }
 176 #endif
 177
 178 static void
 179 _tdm_vblank_valid_list_add(struct list_head *valid_link, struct list_head *valid_list)
 180 {
 181         pthread_mutex_lock(&valid_list_lock);
 182         LIST_ADDTAIL(valid_link, valid_list);
 183         pthread_mutex_unlock(&valid_list_lock);
 184 }
 185
 186 static void
 187 _tdm_vblank_valid_list_del(struct list_head *valid_link)
 188 {
 189         pthread_mutex_lock(&valid_list_lock);
 190         LIST_DEL(valid_link);
 191         pthread_mutex_unlock(&valid_list_lock);
 192 }
 193
 194 static inline tdm_private_vblank*
 195 _tdm_vblank_find(double vblank_stamp)
 196 {
 197         tdm_private_vblank *v = NULL;
 198
 199         if (!vblank_stamp)
 200                 return 0;
 201
 202         pthread_mutex_lock(&valid_list_lock);
 203         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
 204                 if (v->stamp == vblank_stamp) {
 205                         pthread_mutex_unlock(&valid_list_lock);
 206                         return v;
 207                 }
 208         }
 209         pthread_mutex_unlock(&valid_list_lock);
 210
 211         return 0;
 212 }
 213
 214 static inline unsigned int
 215 _tdm_vblank_check_valid_wait(tdm_vblank_wait_info *wait_info)
 216 {
 217         tdm_vblank_wait_info *w = NULL;
 218
 219         if (!wait_info)
 220                 return 0;
 221
 222         pthread_mutex_lock(&valid_list_lock);
 223         LIST_FOR_EACH_ENTRY(w, &valid_wait_list, valid_link) {
 224                 if (w == wait_info) {
 225                         pthread_mutex_unlock(&valid_list_lock);
 226                         return 1;
 227                 }
 228         }
 229         pthread_mutex_unlock(&valid_list_lock);
 230
 231         return 0;
 232 }
 233
 234 static inline unsigned int
 235 _tdm_vblank_find_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
 236 {
 237         tdm_vblank_wait_info *w = NULL;
 238
 239         if (!wait_info)
 240                 return 0;
 241
 242         LIST_FOR_EACH_ENTRY(w, list, link) {
 243                 if (w->stamp == wait_info->stamp)
 244                         return 1;
 245         }
 246
 247         return 0;
 248 }
 249
 250 static inline void
 251 _tdm_vblank_insert_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
 252 {
 253         tdm_vblank_wait_info *w = NULL;
 254         tdm_vblank_wait_info *found = NULL;
 255
 256         if (LIST_IS_EMPTY(list)) {
 257                 LIST_ADDTAIL(&wait_info->link, list);
 258                 return;
 259         }
 260
 261         LIST_FOR_EACH_ENTRY(w, list, link) {
 262                 if (wait_info->type == VBLANK_TYPE_SW) {
 263                         if (wait_info->target_time == 0)
 264                                 TDM_NEVER_GET_HERE();
 265                         if (w->target_time <= wait_info->target_time) {
 266                                 found = w;
 267                                 continue;
 268                         }
 269                 } else {
 270                         if (w->interval <= wait_info->interval) {
 271                                 found = w;
 272                                 continue;
 273                         }
 274                 }
 275         }
 276
 277         if (found)
 278                 LIST_ADD(&wait_info->link, &found->link);
 279         else
 280                 LIST_ADDTAIL(&wait_info->link, list->next);
 281 }
 282
 283 static void
 284 _tdm_vblank_change_to_SW(tdm_private_vblank *private_vblank)
 285 {
 286         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 287
 288         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
 289                 LIST_DEL(&w->link);
 290
 291                 tdm_display_lock(private_vblank->dpy);
 292                 tdm_output_remove_vblank_handler_internal(private_vblank->output, _tdm_vblank_cb_vblank_HW, w);
 293                 tdm_display_unlock(private_vblank->dpy);
 294
 295                 w->type = VBLANK_TYPE_SW_FAKE;
 296                 _tdm_vblank_wait_SW(w);
 297         }
 298 }
 299
 300 static void
 301 _tdm_vblank_free_HW_wait(tdm_private_vblank *private_vblank, tdm_error error, unsigned int call_cb)
 302 {
 303         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 304
 305         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
 306                 LIST_DEL(&w->link);
 307                 _tdm_vblank_valid_list_del(&w->valid_link);
 308
 309                 tdm_display_lock(private_vblank->dpy);
 310                 tdm_output_remove_vblank_handler_internal(private_vblank->output, _tdm_vblank_cb_vblank_HW, w);
 311                 tdm_display_unlock(private_vblank->dpy);
 312
 313                 if (call_cb && w->func)
 314                         w->func(private_vblank, error, 0, 0, 0, w->user_data);
 315
 316                 free(w);
 317         }
 318 }
 319
 320 static void
 321 _tdm_vblank_update_output_info(tdm_private_vblank *private_vblank)
 322 {
 323         tdm_output *output = private_vblank->output;
 324         tdm_output_conn_status connection = TDM_OUTPUT_CONN_STATUS_DISCONNECTED;
 325         unsigned int vrefresh = 0;
 326
 327         tdm_output_get_conn_status(output, &connection);
 328
 329         if (connection != TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
 330                 const tdm_output_mode *mode = NULL;
 331                 tdm_output_get_mode(output, &mode);
 332                 if (mode)
 333                         vrefresh = mode->vrefresh;
 334                 else
 335                         VWR("mode not setted!!!");
 336         }
 337
 338         if (vrefresh == 0) {
 339                 VWR("vrefresh can't be zero !!!");
 340                 vrefresh = TDM_VBLANK_DEFAULT_VREFRESH;
 341         }
 342
 343         private_vblank->connection = connection;
 344         private_vblank->vrefresh = vrefresh;
 345         private_vblank->HW_vblank_gap = 1.0 / private_vblank->vrefresh;
 346
 347         if (private_vblank->fps_changeable)
 348                 private_vblank->fps = vrefresh;
 349
 350         VIN("connection(%d) vrefresh(%d) fps(%d) fps_changeable(%d)",
 351                 private_vblank->connection,
 352                 private_vblank->vrefresh, private_vblank->fps, private_vblank->fps_changeable);
 353 }
 354
 355 /* LCOV_EXCL_START */
 356 static void
 357 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
 358                                                          tdm_value value, void *user_data)
 359 {
 360         tdm_private_vblank *private_vblank = user_data;
 361
 362         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 363
 364         switch (type) {
 365         case TDM_OUTPUT_CHANGE_DPMS:
 366                 VIN("dpms %s", tdm_dpms_str(value.u32));
 367                 private_vblank->check_HW_or_SW = 1;
 368                 if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(value.u32)) {
 369                         if (private_vblank->enable_fake)
 370                                 _tdm_vblank_change_to_SW(private_vblank);
 371                         else
 372                                 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
 373                 }
 374                 break;
 375         case TDM_OUTPUT_CHANGE_CONNECTION:
 376                 if (private_vblank->connection == value.u32)
 377                         break;
 378                 VIN("output %s", tdm_status_str(value.u32));
 379                 _tdm_vblank_update_output_info(private_vblank);
 380                 private_vblank->check_HW_or_SW = 1;
 381                 if (private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
 382                         if (private_vblank->enable_fake)
 383                                 _tdm_vblank_change_to_SW(private_vblank);
 384                         else
 385                                 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_OUTPUT_DISCONNECTED, 1);
 386                 }
 387                 break;
 388         default:
 389                 break;
 390         }
 391 }
 392 /* LCOV_EXCL_STOP */
 393
 394 EXTERN tdm_error
 395 tdm_vblank_set_client_vblank_fps(unsigned int pid, const char *name, unsigned int fps)
 396 {
 397         tdm_private_vblank *v = NULL;
 398
 399         TDM_RETURN_VAL_IF_FAIL(pid > 0, TDM_ERROR_INVALID_PARAMETER);
 400         TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 401
 402         TDM_INFO("pid: %u, name: %s, fps: %d", pid, name, fps);
 403
 404         pthread_mutex_lock(&valid_list_lock);
 405         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
 406                 struct wl_client *client;
 407                 pid_t client_pid = 0;
 408
 409                 if (!v->resource)
 410                         continue;
 411
 412                 client = wl_resource_get_client(v->resource);
 413                 if (!client)
 414                         continue;
 415
 416                 wl_client_get_credentials(client, &client_pid, NULL, NULL);
 417
 418                 if (client_pid != pid)
 419                         continue;
 420
 421                 if (name && strncmp(name, TDM_VBLANK_DEFAULT_NAME, TDM_NAME_LEN)) {
 422                         if (strncmp(v->name, name, TDM_NAME_LEN))
 423                                 continue;
 424                 }
 425
 426                 tdm_vblank_set_fps(v, fps);
 427
 428                 TDM_INFO("(pid:%u) '%s' fps changed: %d", pid, v->name, fps);
 429         }
 430         pthread_mutex_unlock(&valid_list_lock);
 431
 432         return TDM_ERROR_NONE;
 433 }
 434
 435 EXTERN tdm_error
 436 tdm_vblank_enable_global_fps(unsigned int enable, unsigned int fps)
 437 {
 438         tdm_private_vblank *v = NULL;
 439
 440         if (enable)
 441                 TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 442
 443         TDM_INFO("global fps: %s fps(%d)", (enable) ? "enabled" : "disabled", fps);
 444
 445         pthread_mutex_lock(&valid_list_lock);
 446
 447         vblank_global_fps = (enable) ? fps : 0;
 448
 449         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
 450                 /* skip if vblank is created in server side */
 451                 if (!v->resource)
 452                         continue;
 453
 454                 v->check_HW_or_SW = 1;
 455         }
 456         pthread_mutex_unlock(&valid_list_lock);
 457
 458         return TDM_ERROR_NONE;
 459 }
 460
 461 EXTERN tdm_vblank *
 462 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
 463 {
 464         tdm_private_vblank *private_vblank;
 465         tdm_error ret;
 466
 467         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
 468         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
 469
 470         if (error)
 471                 *error = TDM_ERROR_NONE;
 472
 473         if (!vblank_list_inited) {
 474                 if (pthread_mutex_init(&valid_list_lock, NULL)) {
 475                         /* LCOV_EXCL_START */
 476                         TDM_ERR("mutex init failed: %m");
 477                         if (error)
 478                                 *error = TDM_ERROR_OPERATION_FAILED;
 479                         return NULL;
 480                         /* LCOV_EXCL_STOP */
 481                 }
 482                 LIST_INITHEAD(&valid_vblank_list);
 483                 LIST_INITHEAD(&valid_wait_list);
 484                 vblank_list_inited = 1;
 485         }
 486
 487         private_vblank = calloc(1, sizeof * private_vblank);
 488         if (!private_vblank) {
 489                 /* LCOV_EXCL_START */
 490                 if (error)
 491                         *error = TDM_ERROR_OUT_OF_MEMORY;
 492                 VER("alloc failed");
 493                 return NULL;
 494                 /* LCOV_EXCL_STOP */
 495         }
 496
 497         tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
 498
 499         private_vblank->stamp = ++stamp;
 500         private_vblank->owner_tid = syscall(SYS_gettid);
 501         private_vblank->dpy = dpy;
 502         private_vblank->output = output;
 503         private_vblank->check_HW_or_SW = 1;
 504         private_vblank->fps_changeable = 1;
 505
 506         _tdm_vblank_update_output_info(private_vblank);
 507
 508         strncpy(private_vblank->name, TDM_VBLANK_DEFAULT_NAME, TDM_NAME_LEN - 1);
 509         private_vblank->name[TDM_NAME_LEN - 1] = '\0';
 510
 511         LIST_INITHEAD(&private_vblank->HW_wait_list);
 512         LIST_INITHEAD(&private_vblank->SW_wait_list);
 513
 514         _tdm_vblank_valid_list_add(&private_vblank->valid_link, &valid_vblank_list);
 515
 516         VIN("created. vrefresh(%d) connection(%d)",
 517                 private_vblank->vrefresh, private_vblank->connection);
 518
 519         return (tdm_vblank *)private_vblank;
 520 }
 521
 522 EXTERN void
 523 tdm_vblank_destroy(tdm_vblank *vblank)
 524 {
 525         tdm_private_vblank *private_vblank = vblank;
 526         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 527
 528         if (!private_vblank)
 529                 return;
 530
 531         _tdm_vblank_valid_list_del(&private_vblank->valid_link);
 532
 533         if (private_vblank->SW_timer) {
 534                 tdm_display_lock(private_vblank->dpy);
 535                 tdm_event_loop_source_remove(private_vblank->SW_timer);
 536                 tdm_display_unlock(private_vblank->dpy);
 537         }
 538
 539         tdm_output_remove_change_handler(private_vblank->output,
 540                                                                          _tdm_vblank_cb_output_change, private_vblank);
 541
 542         _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
 543
 544         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 545                 LIST_DEL(&w->link);
 546                 _tdm_vblank_valid_list_del(&w->valid_link);
 547                 free(w);
 548         }
 549
 550         VIN("destroyed");
 551
 552         free(private_vblank);
 553 }
 554
 555 EXTERN tdm_error
 556 tdm_vblank_set_name(tdm_vblank *vblank, const char *name)
 557 {
 558         tdm_private_vblank *private_vblank = vblank;
 559
 560         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 561
 562         if (!name)
 563                 name = TDM_VBLANK_DEFAULT_NAME;
 564
 565         strncpy(private_vblank->name, name, TDM_NAME_LEN - 1);
 566         private_vblank->name[TDM_NAME_LEN - 1] = '\0';
 567
 568         VIN("name(%s)", name);
 569
 570         return TDM_ERROR_NONE;
 571 }
 572
 573 EXTERN tdm_error
 574 tdm_vblank_get_name(tdm_vblank *vblank, const char **name)
 575 {
 576         tdm_private_vblank *private_vblank = vblank;
 577
 578         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 579         TDM_RETURN_VAL_IF_FAIL(name != NULL, TDM_ERROR_INVALID_PARAMETER);
 580
 581         *name = (const char*)private_vblank->name;
 582
 583         return TDM_ERROR_NONE;
 584 }
 585
 586 EXTERN tdm_error
 587 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
 588 {
 589         tdm_private_vblank *private_vblank = vblank;
 590
 591         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 592         TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 593
 594         if (private_vblank->fps != fps || private_vblank->fps_changeable)
 595                 VIN("fps(%d) fps_changeable(0)", fps);
 596
 597         private_vblank->fps_changeable = 0;
 598
 599         if (private_vblank->fps == fps)
 600                 return TDM_ERROR_NONE;
 601
 602         private_vblank->fps = fps;
 603         private_vblank->check_HW_or_SW = 1;
 604
 605         return TDM_ERROR_NONE;
 606 }
 607
 608 EXTERN tdm_error
 609 tdm_vblank_get_fps(tdm_vblank *vblank, unsigned int *fps)
 610 {
 611         tdm_private_vblank *private_vblank = vblank;
 612
 613         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 614         TDM_RETURN_VAL_IF_FAIL(fps != NULL, TDM_ERROR_INVALID_PARAMETER);
 615
 616         *fps = private_vblank->fps;
 617
 618         return TDM_ERROR_NONE;
 619 }
 620
 621 EXTERN tdm_error
 622 tdm_vblank_ignore_global_fps(tdm_vblank *vblank, unsigned int ignore)
 623 {
 624         tdm_private_vblank *private_vblank = vblank;
 625
 626         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 627
 628         if (private_vblank->ignore_global_fps == ignore)
 629                 return TDM_ERROR_NONE;
 630
 631         private_vblank->ignore_global_fps = ignore;
 632         private_vblank->check_HW_or_SW = 1;
 633
 634         VIN("ignore_global_fps(%d)", private_vblank->ignore_global_fps);
 635
 636         return TDM_ERROR_NONE;
 637 }
 638
 639 EXTERN tdm_error
 640 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
 641 {
 642         tdm_private_vblank *private_vblank = vblank;
 643
 644         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 645
 646         if (private_vblank->offset == offset)
 647                 return TDM_ERROR_NONE;
 648
 649         private_vblank->offset = offset;
 650         private_vblank->check_HW_or_SW = 1;
 651
 652         VIN("offset(%d)", private_vblank->offset);
 653
 654         return TDM_ERROR_NONE;
 655 }
 656
 657 EXTERN tdm_error
 658 tdm_vblank_get_offset(tdm_vblank *vblank, int *offset)
 659 {
 660         tdm_private_vblank *private_vblank = vblank;
 661
 662         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 663         TDM_RETURN_VAL_IF_FAIL(offset != NULL, TDM_ERROR_INVALID_PARAMETER);
 664
 665         *offset = private_vblank->offset;
 666
 667         return TDM_ERROR_NONE;
 668 }
 669
 670 EXTERN tdm_error
 671 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
 672 {
 673         tdm_private_vblank *private_vblank = vblank;
 674
 675         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 676
 677         if (private_vblank->enable_fake == enable_fake)
 678                 return TDM_ERROR_NONE;
 679
 680         private_vblank->enable_fake = enable_fake;
 681
 682         VIN("enable_fake(%d)", private_vblank->enable_fake);
 683
 684         return TDM_ERROR_NONE;
 685 }
 686
 687 EXTERN tdm_error
 688 tdm_vblank_get_enable_fake(tdm_vblank *vblank, unsigned int *enable_fake)
 689 {
 690         tdm_private_vblank *private_vblank = vblank;
 691
 692         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 693         TDM_RETURN_VAL_IF_FAIL(enable_fake != NULL, TDM_ERROR_INVALID_PARAMETER);
 694
 695         *enable_fake = private_vblank->enable_fake;
 696
 697         return TDM_ERROR_NONE;
 698 }
 699
 700 static tdm_error
 701 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
 702 {
 703         tdm_vblank_wait_info *first_wait_info = NULL;
 704         double curr, target;
 705         int ms_delay;
 706         tdm_error ret;
 707
 708         if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
 709                 VER("no wait_info");
 710                 return TDM_ERROR_OPERATION_FAILED;
 711         }
 712
 713         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 714         curr = tdm_helper_get_time();
 715         target = first_wait_info->target_time;
 716
 717         /* ms_delay should be more that 1 */
 718         if (target < curr)
 719                 ms_delay = 1;
 720         else
 721                 ms_delay = ceil((target - curr) * 1000.0);
 722
 723         if (ms_delay < 1)
 724                 ms_delay = 1;
 725
 726         if (ms_delay > 5000)
 727                 VER("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
 728         else
 729                 VDB("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
 730
 731         tdm_display_lock(private_vblank->dpy);
 732
 733         if (!private_vblank->SW_timer) {
 734                 private_vblank->SW_timer =
 735                         tdm_event_loop_add_timer_handler(private_vblank->dpy,
 736                                                                                          _tdm_vblank_cb_vblank_SW,
 737                                                                                          private_vblank,
 738                                                                                          &ret);
 739                 if (!private_vblank->SW_timer) {
 740                         tdm_display_unlock(private_vblank->dpy);
 741                         VER("couldn't add timer");
 742                         return ret;
 743                 }
 744                 VIN("Create SW timer");
 745         }
 746
 747         ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
 748         if (ret != TDM_ERROR_NONE) {
 749                 /* LCOV_EXCL_START */
 750                 tdm_display_unlock(private_vblank->dpy);
 751                 VER("couldn't update timer");
 752                 return ret;
 753                 /* LCOV_EXCL_STOP */
 754         }
 755
 756         tdm_display_unlock(private_vblank->dpy);
 757
 758         return TDM_ERROR_NONE;
 759 }
 760
 761 static void
 762 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
 763                                                  unsigned int tv_sec, unsigned int tv_usec,
 764                                                  void *user_data)
 765 {
 766         tdm_vblank_wait_info *wait_info = user_data;
 767         tdm_private_vblank *private_vblank;
 768
 769         if (!_tdm_vblank_check_valid_wait(wait_info)) {
 770                 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
 771                 return;
 772         }
 773
 774         private_vblank = wait_info->private_vblank;
 775         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 776
 777         if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
 778                 VDB("can't find wait(%p)", wait_info);
 779                 return;
 780         }
 781
 782         if (wait_info->type == VBLANK_TYPE_HW_SW) {
 783                 tdm_error ret;
 784
 785                 LIST_DEL(&wait_info->link);
 786
 787                 /* kernel sends the wrong time of first vblank event. and the time of
 788                  * second vblank is correct.
 789                  */
 790                 wait_info->target_time = TDM_TIME(tv_sec, tv_usec);
 791                 wait_info->target_time += (((double)private_vblank->offset) / 1000.0);
 792
 793                 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
 794
 795                 ret = _tdm_vblank_sw_timer_update(private_vblank);
 796
 797                 /* wait_info will be freed in _tdm_vblank_cb_vblank_SW() */
 798                 if (ret == TDM_ERROR_NONE) {
 799                         VDB("wait(%p) SW timer", wait_info);
 800                         return;
 801                 }
 802
 803                 VWR("couldn't update sw timer");
 804         }
 805
 806         LIST_DEL(&wait_info->link);
 807         _tdm_vblank_valid_list_del(&wait_info->valid_link);
 808
 809         /* tv_sec & tv_usec shouldn't be zero. But sometimes they are zero in some hardware.
 810          * We need to prohibit that last_time becomes zero because "last_time == 0" means
 811          * that a tdm_vblank object is just created and doesn't have the first vblank event.
 812          * If last_time becomes 0, it would make issue.
 813          */
 814         if (tv_sec == 0 && tv_usec == 0) {
 815                 double curr = tdm_helper_get_time();
 816                 tv_sec = TDM_TIME_SEC(curr);
 817                 tv_usec = TDM_TIME_USEC(curr);
 818         }
 819
 820         private_vblank->last_seq = wait_info->target_seq;
 821         private_vblank->last_time = TDM_TIME(tv_sec, tv_usec);
 822
 823         VDB("wait(%p) last(%.6f) sequence(%u) done", wait_info, private_vblank->last_time, wait_info->target_seq);
 824
 825         if (wait_info->func)
 826                 wait_info->func(private_vblank, TDM_ERROR_NONE, wait_info->target_seq,
 827                                                 tv_sec, tv_usec, wait_info->user_data);
 828
 829         free(wait_info);
 830 }
 831
 832 static tdm_error
 833 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
 834 {
 835         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 836         int hw_interval;
 837         tdm_error ret;
 838
 839         if (private_vblank->last_type != VBLANK_EVENT_TYPE_HW) {
 840                 VIN("Use HW vblank");
 841                 private_vblank->last_type = VBLANK_EVENT_TYPE_HW;
 842         }
 843
 844         _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
 845
 846         hw_interval = wait_info->interval * private_vblank->quotient;
 847
 848         if (private_vblank->last_time == 0) {
 849                 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
 850                 private_vblank->last_seq = 0;
 851                 private_vblank->last_time = tdm_helper_get_time();
 852
 853                 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
 854                 wait_info->target_seq = 1;
 855
 856                 VDB("wait(%p) last(%.6f) hw_itvl(%d) targ_seq(%u)",
 857                         wait_info, private_vblank->last_time, hw_interval, wait_info->target_seq);
 858         } else {
 859                 double last, prev, req, curr, target;
 860                 unsigned int skip;
 861
 862                 last = private_vblank->last_time;
 863                 req = wait_info->req_time;
 864
 865                 /* make sure that req time is bigger than last. */
 866                 if (req < last)
 867                         req = last;
 868
 869                 skip = (unsigned int)((req - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
 870                 prev = last + private_vblank->vblank_gap * skip;
 871
 872                 curr = tdm_helper_get_time();
 873                 target = last;
 874                 while (target < curr)
 875                         target += (private_vblank->vblank_gap * wait_info->interval);
 876
 877                 hw_interval = (unsigned int)((target - curr) / private_vblank->HW_vblank_gap + TDM_TIME_MARGIN) + 1;
 878
 879                 wait_info->target_seq = private_vblank->last_seq;
 880                 wait_info->target_seq += (unsigned int)((target - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
 881
 882                 if (hw_interval > 300)
 883                         VER("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
 884                                 wait_info, last, req - last, prev - last, curr - last, target, target - last,
 885                                 skip, hw_interval, wait_info->target_seq);
 886                 else
 887                         VDB("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
 888                                 wait_info, last, req - last, prev - last, curr - last, target, target - last,
 889                                 skip, hw_interval, wait_info->target_seq);
 890         }
 891
 892         if (private_vblank->add_front)
 893                 ret = tdm_output_wait_vblank_add_front(private_vblank->output, hw_interval, 0,
 894                                                                                            _tdm_vblank_cb_vblank_HW, wait_info);
 895         else
 896                 ret = tdm_output_wait_vblank(private_vblank->output, hw_interval, 0,
 897                                                                          _tdm_vblank_cb_vblank_HW, wait_info);
 898
 899         if (ret != TDM_ERROR_NONE) {
 900                 LIST_DEL(&wait_info->link);
 901                 return ret;
 902         }
 903
 904         VDB("wait(%p) waiting", wait_info);
 905
 906         return TDM_ERROR_NONE;
 907 }
 908
 909 static tdm_error
 910 _tdm_vblank_cb_vblank_SW(void *user_data)
 911 {
 912         tdm_private_vblank *private_vblank = user_data;
 913
 914         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
 915
 916         return tdm_vblank_cb_vblank_SW(private_vblank, 0);
 917 }
 918
 919 INTERN tdm_error
 920 tdm_vblank_cb_vblank_SW(tdm_vblank *vblank, double vblank_stamp)
 921 {
 922         tdm_private_vblank *private_vblank;
 923         tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
 924
 925         TDM_RETURN_VAL_IF_FAIL(vblank || vblank_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
 926
 927         if (vblank)
 928                 private_vblank = vblank;
 929         else {
 930                 private_vblank = _tdm_vblank_find(vblank_stamp);
 931                 if (!private_vblank) {
 932                         TDM_DBG("can't find vblank(%.0f) from valid_list", vblank_stamp);
 933                         return TDM_ERROR_NONE;
 934                 }
 935         }
 936
 937         if (private_vblank->owner_tid != syscall(SYS_gettid)) {
 938                 tdm_thread_cb_vblank_sw vblank_sw;
 939                 tdm_private_display *private_display = private_vblank->dpy;
 940                 tdm_error ret;
 941
 942                 vblank_sw.base.type = TDM_THREAD_CB_VBLANK_SW;
 943                 vblank_sw.base.length = sizeof vblank_sw;
 944                 vblank_sw.vblank_stamp = private_vblank->stamp;
 945
 946                 ret = tdm_thread_send_cb(private_display->private_loop, &vblank_sw.base);
 947                 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 948
 949                 return TDM_ERROR_NONE;
 950         }
 951
 952         if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
 953                 VER("no wait_info");
 954                 return TDM_ERROR_OPERATION_FAILED;
 955         }
 956
 957         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 958         TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
 959
 960         if (private_vblank->last_seq >= first_wait_info->target_seq)
 961                 TDM_ERR("last_seq(%u) target_seq(%u)", private_vblank->last_seq, first_wait_info->target_seq);
 962
 963         private_vblank->last_seq = first_wait_info->target_seq;
 964         private_vblank->last_time = first_wait_info->target_time;
 965
 966         VDB("wait(%p) last(%.6f) sequence(%u) done", first_wait_info, private_vblank->last_time, first_wait_info->target_seq);
 967
 968         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 969                 if (w->target_time != first_wait_info->target_time)
 970                         break;
 971
 972                 TDM_TRACE_ASYNC_END((int)w->req_time, "TDM_SW_Vblank:%u", (unsigned int)private_vblank->stamp);
 973
 974                 LIST_DEL(&w->link);
 975                 _tdm_vblank_valid_list_del(&w->valid_link);
 976
 977                 if (w->func) {
 978                         tdm_display_unlock(private_vblank->dpy);
 979                         w->func(private_vblank, TDM_ERROR_NONE, w->target_seq,
 980                                         TDM_TIME_SEC(w->target_time), TDM_TIME_USEC(w->target_time),
 981                                         w->user_data);
 982                         tdm_display_lock(private_vblank->dpy);
 983                 }
 984
 985                 free(w);
 986         }
 987
 988         return TDM_ERROR_NONE;
 989 }
 990
 991 static tdm_error
 992 _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info)
 993 {
 994         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 995         tdm_error ret;
 996
 997         if (private_vblank->last_type != VBLANK_EVENT_TYPE_SW) {
 998                 VIN("Use SW vblank");
 999                 private_vblank->last_type = VBLANK_EVENT_TYPE_SW;
1000         }
1001
1002         if (private_vblank->last_time == 0) {
1003                 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
1004                 private_vblank->last_seq = 0;
1005                 private_vblank->last_time = tdm_helper_get_time();
1006
1007                 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
1008                 wait_info->target_seq = 1;
1009                 wait_info->target_time = private_vblank->last_time + 0.001;
1010
1011                 VDB("wait(%p) last(%.6f) target(%.6f) target sequence(%u)",
1012                         wait_info, private_vblank->last_time, wait_info->target_time, wait_info->target_seq);
1013         } else {
1014                 double last, prev, req, curr, target;
1015                 unsigned int skip;
1016
1017                 last = private_vblank->last_time;
1018                 req = wait_info->req_time;
1019
1020                 /* make sure that req time is bigger than last. */
1021                 if (req < last)
1022                         req = last;
1023
1024                 skip = (unsigned int)((req - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
1025                 prev = last + private_vblank->vblank_gap * skip;
1026
1027                 curr = tdm_helper_get_time();
1028                 target = prev + private_vblank->vblank_gap * wait_info->interval;
1029
1030                 while (target < curr)
1031                         target += private_vblank->vblank_gap;
1032
1033                 wait_info->target_seq = private_vblank->last_seq;
1034                 wait_info->target_seq += (unsigned int)((target - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
1035
1036                 wait_info->target_time = target;
1037
1038                 VDB("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) targ_seq(%u)",
1039                         wait_info, last, req - last, prev - last, curr - last,
1040                         target, target - last, skip, wait_info->target_seq);
1041         }
1042
1043         _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
1044
1045         TDM_TRACE_ASYNC_BEGIN((int)wait_info->req_time, "TDM_SW_Vblank:%u", (unsigned int)private_vblank->stamp);
1046
1047         ret = _tdm_vblank_sw_timer_update(private_vblank);
1048         if (ret != TDM_ERROR_NONE) {
1049                 /* LCOV_EXCL_START */
1050                 LIST_DEL(&wait_info->link);
1051                 VER("couldn't update sw timer");
1052                 return ret;
1053                 /* LCOV_EXCL_STOP */
1054         }
1055
1056         return TDM_ERROR_NONE;
1057 }
1058
1059 EXTERN tdm_error
1060 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
1061                                 unsigned int interval, tdm_vblank_handler func, void *user_data)
1062 {
1063         tdm_private_vblank *private_vblank = vblank;
1064         tdm_vblank_wait_info *wait_info;
1065         tdm_output_dpms dpms = TDM_OUTPUT_DPMS_OFF;
1066         unsigned int fps;
1067         tdm_error ret;
1068
1069         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1070         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
1071
1072         if (private_vblank->owner_tid != syscall(SYS_gettid)) {
1073                 TDM_ERR("SHOULD be called in the owner thread(%d)", (int)private_vblank->owner_tid);
1074                 return TDM_ERROR_BAD_REQUEST;
1075         }
1076
1077         tdm_output_get_dpms(private_vblank->output, &dpms);
1078
1079         if (!private_vblank->enable_fake) {
1080                 if (private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
1081                         VER("can't wait a vblank: output disconnected");
1082                         return TDM_ERROR_OUTPUT_DISCONNECTED;
1083                 }
1084                 if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms)) {
1085                         VER("can't wait a vblank: DPMS %s", tdm_dpms_str(dpms));
1086                         return TDM_ERROR_DPMS_OFF;
1087                 }
1088         }
1089
1090         wait_info = calloc(1, sizeof * wait_info);
1091         if (!wait_info) {
1092                 /* LCOV_EXCL_START */
1093                 VER("alloc failed");
1094                 return TDM_ERROR_OUT_OF_MEMORY;
1095                 /* LCOV_EXCL_STOP */
1096         }
1097
1098         /* set request time to current time if 0. This function seems to be called in server side. */
1099         if (req_sec == 0 && req_usec == 0) {
1100                 double curr = tdm_helper_get_time();
1101                 req_sec = TDM_TIME_SEC(curr);
1102                 req_usec = TDM_TIME_USEC(curr);
1103         }
1104
1105         LIST_INITHEAD(&wait_info->link);
1106
1107         _tdm_vblank_valid_list_add(&wait_info->valid_link, &valid_wait_list);
1108
1109         wait_info->stamp = ++stamp;
1110         wait_info->req_time = TDM_TIME(req_sec, req_usec);
1111         wait_info->interval = interval;
1112         wait_info->func = func;
1113         wait_info->user_data = user_data;
1114         wait_info->private_vblank = private_vblank;
1115
1116         if (private_vblank->ignore_global_fps ||
1117                 vblank_global_fps == 0 ||
1118                 private_vblank->fps < vblank_global_fps)
1119                 fps = private_vblank->fps;
1120         else
1121                 fps = vblank_global_fps;
1122
1123         if (private_vblank->check_HW_or_SW) {
1124                 private_vblank->check_HW_or_SW = 0;
1125                 private_vblank->vblank_gap = 1.0 / fps;
1126                 private_vblank->quotient = private_vblank->vrefresh / fps;
1127         }
1128
1129         /* 1) if fps != factor of vrefresh, SW timer
1130          * 2) if fps == factor of vrefresh && dpms == off, SW timer (Fake HW vblank)
1131          * 2) if fps == factor of vrefresh && dpms == on && offset == 0, HW vblank
1132          * 3) if fps == factor of vrefresh && dpms == on && offset != 0, HW vblank + SW timer
1133          * In case of 1), we really don't need to align with HW vblank.
1134          */
1135         if (private_vblank->vrefresh % fps)
1136                 wait_info->type = VBLANK_TYPE_SW;
1137         else if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms) ||
1138                          private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
1139                 wait_info->type = VBLANK_TYPE_SW_FAKE;
1140         else if (private_vblank->offset == 0)
1141                 wait_info->type = VBLANK_TYPE_HW;
1142         else
1143                 wait_info->type = VBLANK_TYPE_HW_SW;
1144
1145         if (wait_info->type == VBLANK_TYPE_SW || wait_info->type == VBLANK_TYPE_SW_FAKE) {
1146                 ret = _tdm_vblank_wait_SW(wait_info);
1147                 if (ret != TDM_ERROR_NONE)
1148                         TDM_ERR("_tdm_vblank_wait_SW failed: ret(%d)", ret);
1149         } else {
1150                 ret = _tdm_vblank_wait_HW(wait_info);
1151                 if (ret != TDM_ERROR_NONE)
1152                         TDM_ERR("_tdm_vblank_wait_HW failed: ret(%d)", ret);
1153
1154                 if (ret == TDM_ERROR_OUTPUT_DISCONNECTED || ret == TDM_ERROR_DPMS_OFF) {
1155                         ret = _tdm_vblank_wait_SW(wait_info);
1156                         if (ret != TDM_ERROR_NONE)
1157                                 TDM_ERR("_tdm_vblank_wait_SW failed: ret(%d)", ret);
1158                 }
1159         }
1160
1161         if (ret != TDM_ERROR_NONE) {
1162                 /* LCOV_EXCL_START */
1163                 LIST_DEL(&wait_info->link);
1164                 _tdm_vblank_valid_list_del(&wait_info->valid_link);
1165
1166                 tdm_display_lock(private_vblank->dpy);
1167                 tdm_output_remove_vblank_handler_internal(private_vblank->output, _tdm_vblank_cb_vblank_HW, wait_info);
1168                 tdm_display_unlock(private_vblank->dpy);
1169
1170                 free(wait_info);
1171                 return ret;
1172                 /* LCOV_EXCL_STOP */
1173         }
1174
1175         return TDM_ERROR_NONE;
1176 }
1177
1178 EXTERN tdm_error
1179 tdm_vblank_wait_seq(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
1180                                         unsigned int sequence, tdm_vblank_handler func, void *user_data)
1181 {
1182         tdm_private_vblank *private_vblank = vblank;
1183         unsigned int interval;
1184
1185         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1186         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
1187
1188         /* if the sequence of vblank reaches the max value, sequence can be 0. */
1189
1190         if (private_vblank->last_seq == 0) {
1191                 TDM_WRN("can't calculate interval with sequence(%u)", sequence);
1192                 interval = 1;
1193         } else if (sequence > private_vblank->last_seq ||
1194                            TDM_VBLANK_SEQ_REACHED_MAX(sequence, private_vblank->last_seq)) {
1195                 double last, curr, seq_target;
1196
1197                 last = private_vblank->last_time;
1198                 curr = tdm_helper_get_time();
1199                 seq_target = last + private_vblank->vblank_gap * (sequence - private_vblank->last_seq);
1200
1201                 /* If target is old or too close(1ms) to current, we call the handler immediately.
1202                  * 2ms? it seems too much.
1203                  */
1204                 if (seq_target < curr) {
1205                         func(vblank, TDM_ERROR_NONE, sequence,
1206                                  TDM_TIME_SEC(seq_target), TDM_TIME_USEC(seq_target),
1207                                  user_data);
1208                         return TDM_ERROR_NONE;
1209                 } else if ((seq_target - curr) < 0.001) {  /* 1ms */
1210                         func(vblank, TDM_ERROR_NONE, sequence,
1211                                  TDM_TIME_SEC(curr), TDM_TIME_USEC(curr),
1212                                  user_data);
1213                         return TDM_ERROR_NONE;
1214                 }
1215
1216                 interval = (unsigned int)((seq_target - curr) / private_vblank->vblank_gap + TDM_TIME_MARGIN) + 1;
1217         } else {
1218                 /* this seems error. But we handle this like normal to avoid the unexpected error in cliend side */
1219                 TDM_WRN("sequence(%u) should be over the last sequence(%u)", sequence, private_vblank->last_seq);
1220                 func(vblank, TDM_ERROR_NONE, private_vblank->last_seq,
1221                          TDM_TIME_SEC(private_vblank->last_time), TDM_TIME_USEC(private_vblank->last_time),
1222                          user_data);
1223                 return TDM_ERROR_NONE;
1224         }
1225
1226         return tdm_vblank_wait(vblank, req_sec, req_usec, interval, func, user_data);
1227 }
1228
1229 /* LCOV_EXCL_START */
1230 INTERN tdm_error
1231 tdm_vblank_set_add_front(tdm_vblank *vblank, unsigned int add_front)
1232 {
1233         tdm_private_vblank *private_vblank = vblank;
1234
1235         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1236
1237         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
1238
1239         if (private_vblank->add_front == add_front)
1240                 return TDM_ERROR_NONE;
1241
1242         private_vblank->add_front = add_front;
1243
1244         return TDM_ERROR_NONE;
1245 }
1246 /* LCOV_EXCL_STOP */
1247
1248 INTERN tdm_error
1249 tdm_vblank_set_resource(tdm_vblank *vblank, struct wl_resource *resource)
1250 {
1251         tdm_private_vblank *private_vblank = vblank;
1252
1253         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1254         TDM_RETURN_VAL_IF_FAIL(private_vblank->resource == NULL, TDM_ERROR_OPERATION_FAILED);
1255
1256         private_vblank->resource = resource;
1257
1258         return TDM_ERROR_NONE;
1259 }
1260
1261 INTERN double
1262 tdm_vblank_get_stamp(tdm_vblank *vblank)
1263 {
1264         tdm_private_vblank *private_vblank = vblank;
1265
1266         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1267
1268         return private_vblank->stamp;
1269 }
1270
1271 /* LCOV_EXCL_START */
1272 INTERN void
1273 tdm_vblank_get_vblank_list_information(tdm_display *dpy, char *reply, int *len)
1274 {
1275         tdm_private_vblank *v = NULL;
1276
1277         TDM_SNPRINTF(reply, len, "[Client Vblank List]\n");
1278         TDM_SNPRINTF(reply, len, "* global fps: %u\n", vblank_global_fps);
1279         TDM_SNPRINTF(reply, len, "---------------------------------------------------------------\n");
1280         TDM_SNPRINTF(reply, len, "name         fps ignore offset fake process\n");
1281         TDM_SNPRINTF(reply, len, "---------------------------------------------------------------\n");
1282
1283         pthread_mutex_lock(&valid_list_lock);
1284         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
1285                 const char *proc_name = NULL;
1286                 pid_t pid = 0;
1287
1288                 if (v->resource) {
1289                         struct wl_client *client = wl_resource_get_client(v->resource);
1290                         if (client) {
1291                                 wl_client_get_credentials(client, &pid, NULL, NULL);
1292                                 proc_name = tdm_server_get_client_name(pid);
1293                         }
1294                 }
1295
1296                 TDM_SNPRINTF(reply, len, "%-12s %u  %u     %d      %u    %s (pid: %u)\n",
1297                                          v->name, v->fps, v->ignore_global_fps, v->offset, v->enable_fake,
1298                                          (proc_name) ? proc_name : "Unknown", pid);
1299         }
1300         pthread_mutex_unlock(&valid_list_lock);
1301
1302         TDM_SNPRINTF(reply, len, "\n");
1303 }
1304 /* LCOV_EXCL_STOP */
1305