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