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         tdm_error ret;
 327
 328         ret = tdm_output_get_conn_status(output, &connection);
 329         TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 330
 331         if (connection != TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
 332                 const tdm_output_mode *mode = NULL;
 333                 tdm_output_get_mode(output, &mode);
 334                 if (mode)
 335                         vrefresh = mode->vrefresh;
 336                 else
 337                         VWR("mode not setted!!!");
 338         }
 339
 340         if (vrefresh == 0) {
 341                 VWR("vrefresh can't be zero !!!");
 342                 vrefresh = TDM_VBLANK_DEFAULT_VREFRESH;
 343         }
 344
 345         private_vblank->connection = connection;
 346         private_vblank->vrefresh = vrefresh;
 347         private_vblank->HW_vblank_gap = 1.0 / private_vblank->vrefresh;
 348
 349         if (private_vblank->fps_changeable)
 350                 private_vblank->fps = vrefresh;
 351
 352         VIN("connection(%d) vrefresh(%d) fps(%d) fps_changeable(%d)",
 353                 private_vblank->connection,
 354                 private_vblank->vrefresh, private_vblank->fps, private_vblank->fps_changeable);
 355 }
 356
 357 /* LCOV_EXCL_START */
 358 static void
 359 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
 360                                                          tdm_value value, void *user_data)
 361 {
 362         tdm_private_vblank *private_vblank = user_data;
 363
 364         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 365
 366         switch (type) {
 367         case TDM_OUTPUT_CHANGE_DPMS:
 368                 VIN("dpms %s", tdm_dpms_str(value.u32));
 369                 private_vblank->check_HW_or_SW = 1;
 370                 if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(value.u32)) {
 371                         if (private_vblank->enable_fake)
 372                                 _tdm_vblank_change_to_SW(private_vblank);
 373                         else
 374                                 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
 375                 }
 376                 break;
 377         case TDM_OUTPUT_CHANGE_CONNECTION:
 378                 if (private_vblank->connection == value.u32)
 379                         break;
 380                 VIN("output %s", tdm_status_str(value.u32));
 381                 _tdm_vblank_update_output_info(private_vblank);
 382                 private_vblank->check_HW_or_SW = 1;
 383                 if (private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
 384                         if (private_vblank->enable_fake)
 385                                 _tdm_vblank_change_to_SW(private_vblank);
 386                         else
 387                                 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_OUTPUT_DISCONNECTED, 1);
 388                 }
 389                 break;
 390         default:
 391                 break;
 392         }
 393 }
 394 /* LCOV_EXCL_STOP */
 395
 396 EXTERN tdm_error
 397 tdm_vblank_set_client_vblank_fps(unsigned int pid, const char *name, unsigned int fps)
 398 {
 399         tdm_private_vblank *v = NULL;
 400
 401         TDM_RETURN_VAL_IF_FAIL(pid > 0, TDM_ERROR_INVALID_PARAMETER);
 402         TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 403
 404         TDM_INFO("pid: %u, name: %s, fps: %d", pid, name, fps);
 405
 406         pthread_mutex_lock(&valid_list_lock);
 407         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
 408                 struct wl_client *client;
 409                 pid_t client_pid = 0;
 410
 411                 if (!v->resource)
 412                         continue;
 413
 414                 client = wl_resource_get_client(v->resource);
 415                 if (!client)
 416                         continue;
 417
 418                 wl_client_get_credentials(client, &client_pid, NULL, NULL);
 419
 420                 if (client_pid != pid)
 421                         continue;
 422
 423                 if (name && strncmp(name, TDM_VBLANK_DEFAULT_NAME, TDM_NAME_LEN)) {
 424                         if (strncmp(v->name, name, TDM_NAME_LEN))
 425                                 continue;
 426                 }
 427
 428                 tdm_vblank_set_fps(v, fps);
 429
 430                 TDM_INFO("(pid:%u) '%s' fps changed: %d", pid, v->name, fps);
 431         }
 432         pthread_mutex_unlock(&valid_list_lock);
 433
 434         return TDM_ERROR_NONE;
 435 }
 436
 437 EXTERN tdm_error
 438 tdm_vblank_enable_global_fps(unsigned int enable, unsigned int fps)
 439 {
 440         tdm_private_vblank *v = NULL;
 441
 442         if (enable)
 443                 TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 444
 445         TDM_INFO("global fps: %s fps(%d)", (enable) ? "enabled" : "disabled", fps);
 446
 447         pthread_mutex_lock(&valid_list_lock);
 448
 449         vblank_global_fps = (enable) ? fps : 0;
 450
 451         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
 452                 /* skip if vblank is created in server side */
 453                 if (!v->resource)
 454                         continue;
 455
 456                 v->check_HW_or_SW = 1;
 457         }
 458         pthread_mutex_unlock(&valid_list_lock);
 459
 460         return TDM_ERROR_NONE;
 461 }
 462
 463 EXTERN tdm_vblank *
 464 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
 465 {
 466         tdm_private_vblank *private_vblank;
 467         tdm_error ret;
 468
 469         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(tdm_display_is_valide(dpy), TDM_ERROR_INVALID_PARAMETER, NULL);
 470         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(tdm_output_is_valide(output), TDM_ERROR_INVALID_PARAMETER, NULL);
 471
 472         if (error)
 473                 *error = TDM_ERROR_NONE;
 474
 475         if (!vblank_list_inited) {
 476                 if (pthread_mutex_init(&valid_list_lock, NULL)) {
 477                         /* LCOV_EXCL_START */
 478                         TDM_ERR("mutex init failed: %m");
 479                         if (error)
 480                                 *error = TDM_ERROR_OPERATION_FAILED;
 481                         return NULL;
 482                         /* LCOV_EXCL_STOP */
 483                 }
 484                 LIST_INITHEAD(&valid_vblank_list);
 485                 LIST_INITHEAD(&valid_wait_list);
 486                 vblank_list_inited = 1;
 487         }
 488
 489         private_vblank = calloc(1, sizeof * private_vblank);
 490         if (!private_vblank) {
 491                 /* LCOV_EXCL_START */
 492                 if (error)
 493                         *error = TDM_ERROR_OUT_OF_MEMORY;
 494                 VER("alloc failed");
 495                 return NULL;
 496                 /* LCOV_EXCL_STOP */
 497         }
 498
 499         tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
 500
 501         private_vblank->stamp = ++stamp;
 502         private_vblank->owner_tid = syscall(SYS_gettid);
 503         private_vblank->dpy = dpy;
 504         private_vblank->output = output;
 505         private_vblank->check_HW_or_SW = 1;
 506         private_vblank->fps_changeable = 1;
 507
 508         _tdm_vblank_update_output_info(private_vblank);
 509
 510         strncpy(private_vblank->name, TDM_VBLANK_DEFAULT_NAME, TDM_NAME_LEN - 1);
 511         private_vblank->name[TDM_NAME_LEN - 1] = '\0';
 512
 513         LIST_INITHEAD(&private_vblank->HW_wait_list);
 514         LIST_INITHEAD(&private_vblank->SW_wait_list);
 515
 516         _tdm_vblank_valid_list_add(&private_vblank->valid_link, &valid_vblank_list);
 517
 518         VIN("created. vrefresh(%d) connection(%d)",
 519                 private_vblank->vrefresh, private_vblank->connection);
 520
 521         return (tdm_vblank *)private_vblank;
 522 }
 523
 524 EXTERN void
 525 tdm_vblank_destroy(tdm_vblank *vblank)
 526 {
 527         tdm_private_vblank *private_vblank = vblank;
 528         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 529
 530         if (!private_vblank)
 531                 return;
 532
 533         _tdm_vblank_valid_list_del(&private_vblank->valid_link);
 534
 535         if (private_vblank->SW_timer) {
 536                 tdm_display_lock(private_vblank->dpy);
 537                 tdm_event_loop_source_remove(private_vblank->SW_timer);
 538                 tdm_display_unlock(private_vblank->dpy);
 539         }
 540
 541         tdm_output_remove_change_handler(private_vblank->output,
 542                                                                          _tdm_vblank_cb_output_change, private_vblank);
 543
 544         _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
 545
 546         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 547                 LIST_DEL(&w->link);
 548                 _tdm_vblank_valid_list_del(&w->valid_link);
 549                 free(w);
 550         }
 551
 552         VIN("destroyed");
 553
 554         free(private_vblank);
 555 }
 556
 557 EXTERN tdm_error
 558 tdm_vblank_set_name(tdm_vblank *vblank, const char *name)
 559 {
 560         tdm_private_vblank *private_vblank = vblank;
 561
 562         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 563
 564         if (!name)
 565                 name = TDM_VBLANK_DEFAULT_NAME;
 566
 567         strncpy(private_vblank->name, name, TDM_NAME_LEN - 1);
 568         private_vblank->name[TDM_NAME_LEN - 1] = '\0';
 569
 570         VIN("name(%s)", name);
 571
 572         return TDM_ERROR_NONE;
 573 }
 574
 575 EXTERN tdm_error
 576 tdm_vblank_get_name(tdm_vblank *vblank, const char **name)
 577 {
 578         tdm_private_vblank *private_vblank = vblank;
 579
 580         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 581         TDM_RETURN_VAL_IF_FAIL(name != NULL, TDM_ERROR_INVALID_PARAMETER);
 582
 583         *name = (const char*)private_vblank->name;
 584
 585         return TDM_ERROR_NONE;
 586 }
 587
 588 EXTERN tdm_error
 589 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
 590 {
 591         tdm_private_vblank *private_vblank = vblank;
 592
 593         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 594         TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 595
 596         if (private_vblank->fps != fps || private_vblank->fps_changeable)
 597                 VIN("fps(%d) fps_changeable(0)", fps);
 598
 599         private_vblank->fps_changeable = 0;
 600
 601         if (private_vblank->fps == fps)
 602                 return TDM_ERROR_NONE;
 603
 604         private_vblank->fps = fps;
 605         private_vblank->check_HW_or_SW = 1;
 606
 607         return TDM_ERROR_NONE;
 608 }
 609
 610 EXTERN tdm_error
 611 tdm_vblank_get_fps(tdm_vblank *vblank, unsigned int *fps)
 612 {
 613         tdm_private_vblank *private_vblank = vblank;
 614
 615         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 616         TDM_RETURN_VAL_IF_FAIL(fps != NULL, TDM_ERROR_INVALID_PARAMETER);
 617
 618         *fps = private_vblank->fps;
 619
 620         return TDM_ERROR_NONE;
 621 }
 622
 623 EXTERN tdm_error
 624 tdm_vblank_ignore_global_fps(tdm_vblank *vblank, unsigned int ignore)
 625 {
 626         tdm_private_vblank *private_vblank = vblank;
 627
 628         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 629
 630         if (private_vblank->ignore_global_fps == ignore)
 631                 return TDM_ERROR_NONE;
 632
 633         private_vblank->ignore_global_fps = ignore;
 634         private_vblank->check_HW_or_SW = 1;
 635
 636         VIN("ignore_global_fps(%d)", private_vblank->ignore_global_fps);
 637
 638         return TDM_ERROR_NONE;
 639 }
 640
 641 EXTERN tdm_error
 642 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
 643 {
 644         tdm_private_vblank *private_vblank = vblank;
 645
 646         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 647
 648         if (private_vblank->offset == offset)
 649                 return TDM_ERROR_NONE;
 650
 651         private_vblank->offset = offset;
 652         private_vblank->check_HW_or_SW = 1;
 653
 654         VIN("offset(%d)", private_vblank->offset);
 655
 656         return TDM_ERROR_NONE;
 657 }
 658
 659 EXTERN tdm_error
 660 tdm_vblank_get_offset(tdm_vblank *vblank, int *offset)
 661 {
 662         tdm_private_vblank *private_vblank = vblank;
 663
 664         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 665         TDM_RETURN_VAL_IF_FAIL(offset != NULL, TDM_ERROR_INVALID_PARAMETER);
 666
 667         *offset = private_vblank->offset;
 668
 669         return TDM_ERROR_NONE;
 670 }
 671
 672 EXTERN tdm_error
 673 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
 674 {
 675         tdm_private_vblank *private_vblank = vblank;
 676
 677         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 678
 679         if (private_vblank->enable_fake == enable_fake)
 680                 return TDM_ERROR_NONE;
 681
 682         private_vblank->enable_fake = enable_fake;
 683
 684         VIN("enable_fake(%d)", private_vblank->enable_fake);
 685
 686         return TDM_ERROR_NONE;
 687 }
 688
 689 EXTERN tdm_error
 690 tdm_vblank_get_enable_fake(tdm_vblank *vblank, unsigned int *enable_fake)
 691 {
 692         tdm_private_vblank *private_vblank = vblank;
 693
 694         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 695         TDM_RETURN_VAL_IF_FAIL(enable_fake != NULL, TDM_ERROR_INVALID_PARAMETER);
 696
 697         *enable_fake = private_vblank->enable_fake;
 698
 699         return TDM_ERROR_NONE;
 700 }
 701
 702 static tdm_error
 703 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
 704 {
 705         tdm_vblank_wait_info *first_wait_info = NULL;
 706         double curr, target;
 707         int ms_delay;
 708         tdm_error ret;
 709
 710         if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
 711                 VER("no wait_info");
 712                 return TDM_ERROR_OPERATION_FAILED;
 713         }
 714
 715         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 716         curr = tdm_helper_get_time();
 717         target = first_wait_info->target_time;
 718
 719         /* ms_delay should be more that 1 */
 720         if (target < curr)
 721                 ms_delay = 1;
 722         else
 723                 ms_delay = ceil((target - curr) * 1000.0);
 724
 725         if (ms_delay < 1)
 726                 ms_delay = 1;
 727
 728         if (ms_delay > 5000)
 729                 VER("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
 730         else
 731                 VDB("wait(%p) curr(%.6f) target(%.6f) ms_delay(%d)", first_wait_info, curr, target, ms_delay);
 732
 733         tdm_display_lock(private_vblank->dpy);
 734
 735         if (!private_vblank->SW_timer) {
 736                 private_vblank->SW_timer =
 737                         tdm_event_loop_add_timer_handler(private_vblank->dpy,
 738                                                                                          _tdm_vblank_cb_vblank_SW,
 739                                                                                          private_vblank,
 740                                                                                          &ret);
 741                 if (!private_vblank->SW_timer) {
 742                         tdm_display_unlock(private_vblank->dpy);
 743                         VER("couldn't add timer");
 744                         return ret;
 745                 }
 746                 VIN("Create SW timer");
 747         }
 748
 749         ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
 750         if (ret != TDM_ERROR_NONE) {
 751                 /* LCOV_EXCL_START */
 752                 tdm_display_unlock(private_vblank->dpy);
 753                 VER("couldn't update timer");
 754                 return ret;
 755                 /* LCOV_EXCL_STOP */
 756         }
 757
 758         tdm_display_unlock(private_vblank->dpy);
 759
 760         return TDM_ERROR_NONE;
 761 }
 762
 763 static void
 764 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
 765                                                  unsigned int tv_sec, unsigned int tv_usec,
 766                                                  void *user_data)
 767 {
 768         tdm_vblank_wait_info *wait_info = user_data;
 769         tdm_private_vblank *private_vblank;
 770
 771         if (!_tdm_vblank_check_valid_wait(wait_info)) {
 772                 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
 773                 return;
 774         }
 775
 776         private_vblank = wait_info->private_vblank;
 777         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 778
 779         if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
 780                 VDB("can't find wait(%p)", wait_info);
 781                 return;
 782         }
 783
 784         if (wait_info->type == VBLANK_TYPE_HW_SW) {
 785                 tdm_error ret;
 786
 787                 LIST_DEL(&wait_info->link);
 788
 789                 /* kernel sends the wrong time of first vblank event. and the time of
 790                  * second vblank is correct.
 791                  */
 792                 wait_info->target_time = TDM_TIME(tv_sec, tv_usec);
 793                 wait_info->target_time += (((double)private_vblank->offset) / 1000.0);
 794
 795                 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
 796
 797                 ret = _tdm_vblank_sw_timer_update(private_vblank);
 798
 799                 /* wait_info will be freed in _tdm_vblank_cb_vblank_SW() */
 800                 if (ret == TDM_ERROR_NONE) {
 801                         VDB("wait(%p) SW timer", wait_info);
 802                         return;
 803                 }
 804
 805                 VWR("couldn't update sw timer");
 806         }
 807
 808         LIST_DEL(&wait_info->link);
 809         _tdm_vblank_valid_list_del(&wait_info->valid_link);
 810
 811         /* tv_sec & tv_usec shouldn't be zero. But sometimes they are zero in some hardware.
 812          * We need to prohibit that last_time becomes zero because "last_time == 0" means
 813          * that a tdm_vblank object is just created and doesn't have the first vblank event.
 814          * If last_time becomes 0, it would make issue.
 815          */
 816         if (tv_sec == 0 && tv_usec == 0) {
 817                 double curr = tdm_helper_get_time();
 818                 tv_sec = TDM_TIME_SEC(curr);
 819                 tv_usec = TDM_TIME_USEC(curr);
 820         }
 821
 822         private_vblank->last_seq = wait_info->target_seq;
 823         private_vblank->last_time = TDM_TIME(tv_sec, tv_usec);
 824
 825         VDB("wait(%p) last(%.6f) sequence(%u) done", wait_info, private_vblank->last_time, wait_info->target_seq);
 826
 827         if (wait_info->func)
 828                 wait_info->func(private_vblank, TDM_ERROR_NONE, wait_info->target_seq,
 829                                                 tv_sec, tv_usec, wait_info->user_data);
 830
 831         free(wait_info);
 832 }
 833
 834 static tdm_error
 835 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
 836 {
 837         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 838         int hw_interval;
 839         tdm_error ret;
 840
 841         if (private_vblank->last_type != VBLANK_EVENT_TYPE_HW) {
 842                 VIN("Use HW vblank");
 843                 private_vblank->last_type = VBLANK_EVENT_TYPE_HW;
 844         }
 845
 846         _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
 847
 848         hw_interval = wait_info->interval * private_vblank->quotient;
 849
 850         if (private_vblank->last_time == 0) {
 851                 /* SW vblank starts from now. SW vblank doesn't need to be aligned with HW vblank. */
 852                 private_vblank->last_seq = 0;
 853                 private_vblank->last_time = tdm_helper_get_time();
 854
 855                 /* +1 ms to call the handler ASAP at the first. no matter for SW timer. */
 856                 wait_info->target_seq = 1;
 857
 858                 VDB("wait(%p) last(%.6f) hw_itvl(%d) targ_seq(%u)",
 859                         wait_info, private_vblank->last_time, hw_interval, wait_info->target_seq);
 860         } else {
 861                 double last, prev, req, curr, target;
 862                 unsigned int skip;
 863
 864                 last = private_vblank->last_time;
 865                 req = wait_info->req_time;
 866
 867                 /* make sure that req time is bigger than last. */
 868                 if (req < last)
 869                         req = last;
 870
 871                 skip = (unsigned int)((req - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
 872                 prev = last + private_vblank->vblank_gap * skip;
 873
 874                 curr = tdm_helper_get_time();
 875                 target = last;
 876                 while (target < curr)
 877                         target += (private_vblank->vblank_gap * wait_info->interval);
 878
 879                 hw_interval = (unsigned int)((target - curr) / private_vblank->HW_vblank_gap + TDM_TIME_MARGIN) + 1;
 880
 881                 wait_info->target_seq = private_vblank->last_seq;
 882                 wait_info->target_seq += (unsigned int)((target - last) / private_vblank->vblank_gap + TDM_TIME_MARGIN);
 883
 884                 if (hw_interval > 300)
 885                         VER("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
 886                                 wait_info, last, req - last, prev - last, curr - last, target, target - last,
 887                                 skip, hw_interval, wait_info->target_seq);
 888                 else
 889                         VDB("wait(%p) last(%.6f) req(%.6f) prev(%.6f) curr(%.6f) targ(%.6f,%.6f) skip(%u) hw_itvl(%d) targ_seq(%u)",
 890                                 wait_info, last, req - last, prev - last, curr - last, target, target - last,
 891                                 skip, hw_interval, wait_info->target_seq);
 892         }
 893
 894         if (private_vblank->add_front)
 895                 ret = tdm_output_wait_vblank_add_front(private_vblank->output, hw_interval, 0,
 896                                                                                            _tdm_vblank_cb_vblank_HW, wait_info);
 897         else
 898                 ret = tdm_output_wait_vblank(private_vblank->output, hw_interval, 0,
 899                                                                          _tdm_vblank_cb_vblank_HW, wait_info);
 900
 901         if (ret != TDM_ERROR_NONE) {
 902                 LIST_DEL(&wait_info->link);
 903                 return ret;
 904         }
 905
 906         VDB("wait(%p) waiting", wait_info);
 907
 908         return TDM_ERROR_NONE;
 909 }
 910
 911 static tdm_error
 912 _tdm_vblank_cb_vblank_SW(void *user_data)
 913 {
 914         tdm_private_vblank *private_vblank = user_data;
 915
 916         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
 917
 918         return tdm_vblank_cb_vblank_SW(private_vblank, 0);
 919 }
 920
 921 INTERN tdm_error
 922 tdm_vblank_cb_vblank_SW(tdm_vblank *vblank, double vblank_stamp)
 923 {
 924         tdm_private_vblank *private_vblank;
 925         tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
 926
 927         TDM_RETURN_VAL_IF_FAIL(vblank || vblank_stamp > 0, TDM_ERROR_INVALID_PARAMETER);
 928
 929         if (vblank)
 930                 private_vblank = vblank;
 931         else {
 932                 private_vblank = _tdm_vblank_find(vblank_stamp);
 933                 if (!private_vblank) {
 934                         TDM_DBG("can't find vblank(%.0f) from valid_list", vblank_stamp);
 935                         return TDM_ERROR_NONE;
 936                 }
 937         }
 938
 939         if (private_vblank->owner_tid != syscall(SYS_gettid)) {
 940                 tdm_thread_cb_vblank_sw vblank_sw;
 941                 tdm_private_display *private_display = private_vblank->dpy;
 942                 tdm_error ret;
 943
 944                 vblank_sw.base.type = TDM_THREAD_CB_VBLANK_SW;
 945                 vblank_sw.base.length = sizeof vblank_sw;
 946                 vblank_sw.vblank_stamp = private_vblank->stamp;
 947
 948                 ret = tdm_thread_send_cb(private_display->private_loop, &vblank_sw.base);
 949                 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 950
 951                 return TDM_ERROR_NONE;
 952         }
 953
 954         if (LIST_IS_EMPTY(&private_vblank->SW_wait_list)) {
 955                 VER("no wait_info");
 956                 return TDM_ERROR_OPERATION_FAILED;
 957         }
 958
 959         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 960         TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
 961
 962         if (private_vblank->last_seq >= first_wait_info->target_seq)
 963                 TDM_ERR("last_seq(%u) target_seq(%u)", private_vblank->last_seq, first_wait_info->target_seq);
 964
 965         private_vblank->last_seq = first_wait_info->target_seq;
 966         private_vblank->last_time = first_wait_info->target_time;
 967
 968         VDB("wait(%p) last(%.6f) sequence(%u) done", first_wait_info, private_vblank->last_time, first_wait_info->target_seq);
 969
 970         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 971                 if (w->target_time != first_wait_info->target_time)
 972                         break;
 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         ret = _tdm_vblank_sw_timer_update(private_vblank);
1046         if (ret != TDM_ERROR_NONE) {
1047                 /* LCOV_EXCL_START */
1048                 LIST_DEL(&wait_info->link);
1049                 VER("couldn't update sw timer");
1050                 return ret;
1051                 /* LCOV_EXCL_STOP */
1052         }
1053
1054         return TDM_ERROR_NONE;
1055 }
1056
1057 EXTERN tdm_error
1058 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
1059                                 unsigned int interval, tdm_vblank_handler func, void *user_data)
1060 {
1061         tdm_private_vblank *private_vblank = vblank;
1062         tdm_vblank_wait_info *wait_info;
1063         tdm_output_dpms dpms = TDM_OUTPUT_DPMS_OFF;
1064         unsigned int fps;
1065         tdm_error ret;
1066
1067         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1068         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
1069
1070         if (private_vblank->owner_tid != syscall(SYS_gettid)) {
1071                 TDM_ERR("SHOULD be called in the owner thread(%d)", (int)private_vblank->owner_tid);
1072                 return TDM_ERROR_BAD_REQUEST;
1073         }
1074
1075         tdm_output_get_dpms(private_vblank->output, &dpms);
1076
1077         if (!private_vblank->enable_fake) {
1078                 if (private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED) {
1079                         VER("can't wait a vblank: output disconnected");
1080                         return TDM_ERROR_OUTPUT_DISCONNECTED;
1081                 }
1082                 if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms)) {
1083                         VER("can't wait a vblank: DPMS %s", tdm_dpms_str(dpms));
1084                         return TDM_ERROR_DPMS_OFF;
1085                 }
1086         }
1087
1088         wait_info = calloc(1, sizeof * wait_info);
1089         if (!wait_info) {
1090                 /* LCOV_EXCL_START */
1091                 VER("alloc failed");
1092                 return TDM_ERROR_OUT_OF_MEMORY;
1093                 /* LCOV_EXCL_STOP */
1094         }
1095
1096         /* set request time to current time if 0. This function seems to be called in server side. */
1097         if (req_sec == 0 && req_usec == 0) {
1098                 double curr = tdm_helper_get_time();
1099                 req_sec = TDM_TIME_SEC(curr);
1100                 req_usec = TDM_TIME_USEC(curr);
1101         }
1102
1103         LIST_INITHEAD(&wait_info->link);
1104
1105         _tdm_vblank_valid_list_add(&wait_info->valid_link, &valid_wait_list);
1106
1107         wait_info->stamp = ++stamp;
1108         wait_info->req_time = TDM_TIME(req_sec, req_usec);
1109         wait_info->interval = interval;
1110         wait_info->func = func;
1111         wait_info->user_data = user_data;
1112         wait_info->private_vblank = private_vblank;
1113
1114         if (private_vblank->ignore_global_fps ||
1115                 vblank_global_fps == 0 ||
1116                 private_vblank->fps < vblank_global_fps)
1117                 fps = private_vblank->fps;
1118         else
1119                 fps = vblank_global_fps;
1120
1121         if (private_vblank->check_HW_or_SW) {
1122                 private_vblank->check_HW_or_SW = 0;
1123                 private_vblank->vblank_gap = 1.0 / fps;
1124                 private_vblank->quotient = private_vblank->vrefresh / fps;
1125         }
1126
1127         /* 1) if fps != factor of vrefresh, SW timer
1128          * 2) if fps == factor of vrefresh && dpms == off, SW timer (Fake HW vblank)
1129          * 2) if fps == factor of vrefresh && dpms == on && offset == 0, HW vblank
1130          * 3) if fps == factor of vrefresh && dpms == on && offset != 0, HW vblank + SW timer
1131          * In case of 1), we really don't need to align with HW vblank.
1132          */
1133         if (private_vblank->vrefresh % fps)
1134                 wait_info->type = VBLANK_TYPE_SW;
1135         else if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms) ||
1136                          private_vblank->connection == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
1137                 wait_info->type = VBLANK_TYPE_SW_FAKE;
1138         else if (private_vblank->offset == 0)
1139                 wait_info->type = VBLANK_TYPE_HW;
1140         else
1141                 wait_info->type = VBLANK_TYPE_HW_SW;
1142
1143         if (wait_info->type == VBLANK_TYPE_SW || wait_info->type == VBLANK_TYPE_SW_FAKE) {
1144                 ret = _tdm_vblank_wait_SW(wait_info);
1145                 if (ret != TDM_ERROR_NONE)
1146                         TDM_ERR("_tdm_vblank_wait_SW failed: ret(%d)", ret);
1147         } else {
1148                 ret = _tdm_vblank_wait_HW(wait_info);
1149                 if (ret != TDM_ERROR_NONE)
1150                         TDM_ERR("_tdm_vblank_wait_HW failed: ret(%d)", ret);
1151
1152                 if (ret == TDM_ERROR_OUTPUT_DISCONNECTED || ret == TDM_ERROR_DPMS_OFF) {
1153                         ret = _tdm_vblank_wait_SW(wait_info);
1154                         if (ret != TDM_ERROR_NONE)
1155                                 TDM_ERR("_tdm_vblank_wait_SW failed: ret(%d)", ret);
1156                 }
1157         }
1158
1159         if (ret != TDM_ERROR_NONE) {
1160                 /* LCOV_EXCL_START */
1161                 LIST_DEL(&wait_info->link);
1162                 _tdm_vblank_valid_list_del(&wait_info->valid_link);
1163
1164                 tdm_display_lock(private_vblank->dpy);
1165                 tdm_output_remove_vblank_handler_internal(private_vblank->output, _tdm_vblank_cb_vblank_HW, wait_info);
1166                 tdm_display_unlock(private_vblank->dpy);
1167
1168                 free(wait_info);
1169                 return ret;
1170                 /* LCOV_EXCL_STOP */
1171         }
1172
1173         return TDM_ERROR_NONE;
1174 }
1175
1176 EXTERN tdm_error
1177 tdm_vblank_wait_seq(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
1178                                         unsigned int sequence, tdm_vblank_handler func, void *user_data)
1179 {
1180         tdm_private_vblank *private_vblank = vblank;
1181         unsigned int interval;
1182
1183         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1184         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
1185
1186         /* if the sequence of vblank reaches the max value, sequence can be 0. */
1187
1188         if (private_vblank->last_seq == 0) {
1189                 TDM_WRN("can't calculate interval with sequence(%u)", sequence);
1190                 interval = 1;
1191         } else if (sequence > private_vblank->last_seq ||
1192                            TDM_VBLANK_SEQ_REACHED_MAX(sequence, private_vblank->last_seq)) {
1193                 double last, curr, seq_target;
1194
1195                 last = private_vblank->last_time;
1196                 curr = tdm_helper_get_time();
1197                 seq_target = last + private_vblank->vblank_gap * (sequence - private_vblank->last_seq);
1198
1199                 /* If target is old or too close(1ms) to current, we call the handler immediately.
1200                  * 2ms? it seems too much.
1201                  */
1202                 if (seq_target < curr) {
1203                         func(vblank, TDM_ERROR_NONE, sequence,
1204                                  TDM_TIME_SEC(seq_target), TDM_TIME_USEC(seq_target),
1205                                  user_data);
1206                         return TDM_ERROR_NONE;
1207                 } else if ((seq_target - curr) < 0.001) {  /* 1ms */
1208                         func(vblank, TDM_ERROR_NONE, sequence,
1209                                  TDM_TIME_SEC(curr), TDM_TIME_USEC(curr),
1210                                  user_data);
1211                         return TDM_ERROR_NONE;
1212                 }
1213
1214                 interval = (unsigned int)((seq_target - curr) / private_vblank->vblank_gap + TDM_TIME_MARGIN) + 1;
1215         } else {
1216                 /* this seems error. But we handle this like normal to avoid the unexpected error in cliend side */
1217                 TDM_WRN("sequence(%u) should be over the last sequence(%u)", sequence, private_vblank->last_seq);
1218                 func(vblank, TDM_ERROR_NONE, private_vblank->last_seq,
1219                          TDM_TIME_SEC(private_vblank->last_time), TDM_TIME_USEC(private_vblank->last_time),
1220                          user_data);
1221                 return TDM_ERROR_NONE;
1222         }
1223
1224         return tdm_vblank_wait(vblank, req_sec, req_usec, interval, func, user_data);
1225 }
1226
1227 /* LCOV_EXCL_START */
1228 INTERN tdm_error
1229 tdm_vblank_set_add_front(tdm_vblank *vblank, unsigned int add_front)
1230 {
1231         tdm_private_vblank *private_vblank = vblank;
1232
1233         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1234
1235         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
1236
1237         if (private_vblank->add_front == add_front)
1238                 return TDM_ERROR_NONE;
1239
1240         private_vblank->add_front = add_front;
1241
1242         return TDM_ERROR_NONE;
1243 }
1244 /* LCOV_EXCL_STOP */
1245
1246 INTERN tdm_error
1247 tdm_vblank_set_resource(tdm_vblank *vblank, struct wl_resource *resource)
1248 {
1249         tdm_private_vblank *private_vblank = vblank;
1250
1251         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1252         TDM_RETURN_VAL_IF_FAIL(private_vblank->resource == NULL, TDM_ERROR_OPERATION_FAILED);
1253
1254         private_vblank->resource = resource;
1255
1256         return TDM_ERROR_NONE;
1257 }
1258
1259 INTERN double
1260 tdm_vblank_get_stamp(tdm_vblank *vblank)
1261 {
1262         tdm_private_vblank *private_vblank = vblank;
1263
1264         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
1265
1266         return private_vblank->stamp;
1267 }
1268
1269 /* LCOV_EXCL_START */
1270 INTERN void
1271 tdm_vblank_get_vblank_list_information(tdm_display *dpy, char *reply, int *len)
1272 {
1273         tdm_private_vblank *v = NULL;
1274
1275         TDM_SNPRINTF(reply, len, "[Client Vblank List]\n");
1276         TDM_SNPRINTF(reply, len, "* global fps: %u\n", vblank_global_fps);
1277         TDM_SNPRINTF(reply, len, "---------------------------------------------------------------\n");
1278         TDM_SNPRINTF(reply, len, "name         fps ignore offset fake process\n");
1279         TDM_SNPRINTF(reply, len, "---------------------------------------------------------------\n");
1280
1281         pthread_mutex_lock(&valid_list_lock);
1282         LIST_FOR_EACH_ENTRY(v, &valid_vblank_list, valid_link) {
1283                 const char *proc_name = NULL;
1284                 pid_t pid = 0;
1285
1286                 if (v->resource) {
1287                         struct wl_client *client = wl_resource_get_client(v->resource);
1288                         if (client) {
1289                                 wl_client_get_credentials(client, &pid, NULL, NULL);
1290                                 proc_name = tdm_server_get_client_name(pid);
1291                         }
1292                 }
1293
1294                 TDM_SNPRINTF(reply, len, "%-12s %u  %u     %d      %u    %s (pid: %u)\n",
1295                                          v->name, v->fps, v->ignore_global_fps, v->offset, v->enable_fake,
1296                                          (proc_name) ? proc_name : "Unknown", pid);
1297         }
1298         pthread_mutex_unlock(&valid_list_lock);
1299
1300         TDM_SNPRINTF(reply, len, "\n");
1301 }
1302 /* LCOV_EXCL_STOP */
1303