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  * - tdm vblank doesn't care about thread things.
  46  * - DO NOT use the TDM internal functions here.
  47  *     However, the internal function which does lock/unlock the mutex of
  48  *     private_display in itself can be called.
  49  * - DO NOT use the tdm_private_display structure here.
  50  */
  51
  52 /* TDM vblank
  53  * - aligned by HW vblank
  54  * - use a tdm_event_loop_source object only.
  55  */
  56
  57 #define VER(fmt,arg...)   TDM_ERR("[%p] "fmt, private_vblank, ##arg)
  58 #define VWR(fmt,arg...)   TDM_WRN("[%p] "fmt, private_vblank, ##arg)
  59 #define VIN(fmt,arg...)   TDM_INFO("[%p] "fmt, private_vblank, ##arg)
  60 #define VDB(fmt,arg...)   TDM_DBG("[%p] "fmt, private_vblank, ##arg)
  61
  62 typedef struct _tdm_vblank_wait_info tdm_vblank_wait_info;
  63
  64 typedef struct _tdm_private_vblank {
  65         struct list_head link;
  66
  67         tdm_display *dpy;
  68         tdm_output *output;
  69         tdm_output_dpms dpms;
  70         unsigned int vrefresh;
  71
  72         unsigned int check_HW_or_SW;
  73         unsigned int fps;
  74         int offset;
  75         unsigned int enable_fake;
  76
  77         double vblank_gap;
  78         unsigned int last_seq;
  79         unsigned int last_tv_sec;
  80         unsigned int last_tv_usec;
  81
  82         /* for HW */
  83         double HW_vblank_gap;
  84         unsigned int HW_enable;
  85         unsigned int HW_quotient;
  86         struct list_head HW_wait_list;
  87
  88         /* for SW */
  89         tdm_event_loop_source *SW_timer;
  90         struct list_head SW_pending_wait_list;
  91         struct list_head SW_wait_list;
  92 #if 0
  93         tdm_vblank_wait_info *SW_align_wait;
  94         double SW_align_offset;
  95         unsigned int SW_align_sec;
  96         unsigned int SW_align_usec;
  97 #endif
  98 } tdm_private_vblank;
  99
 100 struct _tdm_vblank_wait_info {
 101         struct list_head link;
 102         struct list_head valid_link;
 103
 104         unsigned int stamp;
 105
 106         unsigned int req_sec;
 107         unsigned int req_usec;
 108         unsigned int interval;
 109
 110         tdm_vblank_handler func;
 111         void *user_data;
 112         tdm_private_vblank *private_vblank;
 113
 114         /* target_sec can be 0 when last_tv_sec is 0 because we can't calculate
 115          * target_sec without last_tv_sec. So we have to call tdm_output_wait_vblank
 116          * to fill last_tv_sec at the first time.
 117          */
 118         unsigned int target_sec;
 119         unsigned int target_usec;
 120         unsigned int target_seq;
 121         int target_hw_interval;
 122 };
 123
 124 static struct list_head vblank_list;
 125 static struct list_head valid_wait_list;
 126 static unsigned int vblank_list_inited;
 127 static unsigned int stamp = 0;
 128
 129 static tdm_error _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info);
 130 #if 0
 131 static void _tdm_vblank_sw_timer_align(tdm_private_vblank *private_vblank);
 132 #endif
 133
 134 #if 0
 135 static void
 136 _print_list(struct list_head *list)
 137 {
 138         tdm_vblank_wait_info *w = NULL;
 139
 140         LIST_FOR_EACH_ENTRY(w, list, link) {
 141                 printf(" %d", w->interval);
 142         }
 143         printf("\n");
 144 }
 145 #endif
 146
 147 static inline unsigned int
 148 _tdm_vblank_check_valid(tdm_vblank_wait_info *wait_info)
 149 {
 150         tdm_vblank_wait_info *w = NULL;
 151
 152         if (!wait_info)
 153                 return 0;
 154
 155         LIST_FOR_EACH_ENTRY(w, &valid_wait_list, valid_link) {
 156                 if (w->stamp == wait_info->stamp)
 157                         return 1;
 158         }
 159
 160         return 0;
 161 }
 162
 163 static inline unsigned int
 164 _tdm_vblank_find_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
 165 {
 166         tdm_vblank_wait_info *w = NULL;
 167
 168         if (!wait_info)
 169                 return 0;
 170
 171         LIST_FOR_EACH_ENTRY(w, list, link) {
 172                 if (w->stamp == wait_info->stamp)
 173                         return 1;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static inline void
 180 _tdm_vblank_insert_wait(tdm_vblank_wait_info *wait_info, struct list_head *list)
 181 {
 182         tdm_vblank_wait_info *w = NULL;
 183
 184         LIST_FOR_EACH_ENTRY_REV(w, list, link) {
 185                 /* If last_tv_sec == 0, we can't calculate target_sec. */
 186                 if (wait_info->target_sec == 0) {
 187                         if (w->interval > wait_info->interval)
 188                                 continue;
 189                         list = &w->link;
 190                         break;
 191                 } else {
 192                         if (w->target_sec > wait_info->target_sec)
 193                                 continue;
 194                         if (w->target_usec > wait_info->target_usec)
 195                                 continue;
 196                         list = &w->link;
 197                 }
 198                 break;
 199         }
 200
 201         LIST_ADDTAIL(&wait_info->link, list->next);
 202 }
 203
 204 static void
 205 _tdm_vblank_change_to_SW(tdm_private_vblank *private_vblank)
 206 {
 207         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 208
 209         VIN("Change to SW");
 210
 211         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
 212                 LIST_DEL(&w->link);
 213                 _tdm_vblank_wait_SW(w);
 214         }
 215 }
 216
 217 static void
 218 _tdm_vblank_free_HW_wait(tdm_private_vblank *private_vblank, tdm_error error, unsigned int call_cb)
 219 {
 220         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 221
 222         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->HW_wait_list, link) {
 223                 LIST_DEL(&w->link);
 224                 LIST_DEL(&w->valid_link);
 225
 226                 if (call_cb && w->func)
 227                         w->func(private_vblank, error, 0, 0, 0, w->user_data);
 228
 229                 free(w);
 230         }
 231 }
 232
 233 static void
 234 _tdm_vblank_cb_output_change(tdm_output *output, tdm_output_change_type type,
 235                                                          tdm_value value, void *user_data)
 236 {
 237         tdm_private_vblank *private_vblank = user_data;
 238
 239         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 240
 241         switch (type) {
 242         case TDM_OUTPUT_CHANGE_DPMS:
 243                 if (private_vblank->dpms == value.u32)
 244                         break;
 245                 VIN("dpms %s", tdm_dpms_str(value.u32));
 246                 private_vblank->dpms = value.u32;
 247                 private_vblank->check_HW_or_SW = 1;
 248                 if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON) {
 249 #if 0
 250                         if (private_vblank->SW_align_wait) {
 251                                 LIST_DEL(&private_vblank->SW_align_wait->valid_link);
 252                                 free(private_vblank->SW_align_wait);
 253                                 private_vblank->SW_align_wait = NULL;
 254                         }
 255 #endif
 256
 257                         if (private_vblank->enable_fake)
 258                                 _tdm_vblank_change_to_SW(private_vblank);
 259                         else
 260                                 _tdm_vblank_free_HW_wait(private_vblank, TDM_ERROR_DPMS_OFF, 1);
 261                 }
 262                 break;
 263         case TDM_OUTPUT_CHANGE_CONNECTION:
 264                 VIN("output %s", tdm_status_str(value.u32));
 265                 if (value.u32 == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)
 266                         _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
 267                 break;
 268         default:
 269                 break;
 270         }
 271 }
 272
 273 tdm_vblank*
 274 tdm_vblank_create(tdm_display *dpy, tdm_output *output, tdm_error *error)
 275 {
 276         tdm_private_vblank *private_vblank;
 277         const tdm_output_mode *mode = NULL;
 278         tdm_output_dpms dpms = TDM_OUTPUT_DPMS_ON;
 279         tdm_error ret;
 280
 281         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
 282         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
 283
 284         if (error)
 285                 *error = TDM_ERROR_NONE;
 286
 287         if (!vblank_list_inited) {
 288                 LIST_INITHEAD(&vblank_list);
 289                 LIST_INITHEAD(&valid_wait_list);
 290                 vblank_list_inited = 1;
 291         }
 292
 293         tdm_output_get_mode(output, &mode);
 294         if (!mode) {
 295                 if (error)
 296                         *error = TDM_ERROR_OPERATION_FAILED;
 297                 TDM_ERR("no mode");
 298                 return NULL;
 299         }
 300
 301         tdm_output_get_dpms(output, &dpms);
 302
 303         private_vblank = calloc(1, sizeof *private_vblank);
 304         if (!private_vblank) {
 305                 if (error)
 306                         *error = TDM_ERROR_OUT_OF_MEMORY;
 307                 VER("alloc failed");
 308                 return NULL;
 309         }
 310
 311         tdm_output_add_change_handler(output, _tdm_vblank_cb_output_change, private_vblank);
 312
 313         private_vblank->dpy = dpy;
 314         private_vblank->output = output;
 315         private_vblank->dpms = dpms;
 316         private_vblank->vrefresh = mode->vrefresh;
 317         private_vblank->HW_vblank_gap = (double)1000000 / private_vblank->vrefresh;
 318
 319         private_vblank->check_HW_or_SW = 1;
 320         private_vblank->fps = mode->vrefresh;
 321
 322         LIST_INITHEAD(&private_vblank->HW_wait_list);
 323
 324         LIST_INITHEAD(&private_vblank->SW_pending_wait_list);
 325         LIST_INITHEAD(&private_vblank->SW_wait_list);
 326
 327         LIST_ADD(&private_vblank->link, &vblank_list);
 328
 329         VDB("created. vrefresh(%d) dpms(%d)",
 330                 private_vblank->vrefresh, private_vblank->dpms);
 331
 332         return (tdm_vblank*)private_vblank;
 333 }
 334
 335 void
 336 tdm_vblank_destroy(tdm_vblank *vblank)
 337 {
 338         tdm_private_vblank *private_vblank = vblank;
 339         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 340
 341         if (!private_vblank)
 342                 return;
 343
 344         LIST_DEL(&private_vblank->link);
 345
 346 #if 0
 347         if (private_vblank->SW_align_wait) {
 348                 LIST_DEL(&private_vblank->SW_align_wait->valid_link);
 349                 free(private_vblank->SW_align_wait);
 350         }
 351 #endif
 352
 353         if (private_vblank->SW_timer) {
 354                 if (tdm_display_lock(private_vblank->dpy) == TDM_ERROR_NONE) {
 355                         tdm_event_loop_source_remove(private_vblank->SW_timer);
 356                         tdm_display_unlock(private_vblank->dpy);
 357                 }
 358         }
 359
 360         tdm_output_remove_change_handler(private_vblank->output,
 361                                                                          _tdm_vblank_cb_output_change, private_vblank);
 362
 363         _tdm_vblank_free_HW_wait(private_vblank, 0, 0);
 364
 365         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_pending_wait_list, link) {
 366                 LIST_DEL(&w->link);
 367                 LIST_DEL(&w->valid_link);
 368                 free(w);
 369         }
 370
 371         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 372                 LIST_DEL(&w->link);
 373                 LIST_DEL(&w->valid_link);
 374                 free(w);
 375         }
 376
 377         VIN("destroyed");
 378
 379         free(private_vblank);
 380 }
 381
 382 tdm_error
 383 tdm_vblank_set_fps(tdm_vblank *vblank, unsigned int fps)
 384 {
 385         tdm_private_vblank *private_vblank = vblank;
 386
 387         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 388         TDM_RETURN_VAL_IF_FAIL(fps > 0, TDM_ERROR_INVALID_PARAMETER);
 389
 390         if (private_vblank->fps == fps)
 391                 return TDM_ERROR_NONE;
 392
 393         private_vblank->fps = fps;
 394         private_vblank->check_HW_or_SW = 1;
 395
 396         VDB("fps(%d)", private_vblank->fps);
 397
 398         return TDM_ERROR_NONE;
 399 }
 400
 401 tdm_error
 402 tdm_vblank_set_offset(tdm_vblank *vblank, int offset)
 403 {
 404         tdm_private_vblank *private_vblank = vblank;
 405
 406         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 407
 408         if (private_vblank->offset == offset)
 409                 return TDM_ERROR_NONE;
 410
 411         private_vblank->offset = offset;
 412         private_vblank->check_HW_or_SW = 1;
 413
 414         VDB("offset(%d)", private_vblank->offset);
 415
 416         return TDM_ERROR_NONE;
 417 }
 418
 419 tdm_error
 420 tdm_vblank_set_enable_fake(tdm_vblank *vblank, unsigned int enable_fake)
 421 {
 422         tdm_private_vblank *private_vblank = vblank;
 423
 424         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 425
 426         if (private_vblank->enable_fake == enable_fake)
 427                 return TDM_ERROR_NONE;
 428
 429         private_vblank->enable_fake = enable_fake;
 430
 431         VDB("enable_fake(%d)", private_vblank->enable_fake);
 432
 433         return TDM_ERROR_NONE;
 434 }
 435
 436 static void
 437 _tdm_vblank_cb_vblank_HW(tdm_output *output, unsigned int sequence,
 438                                                  unsigned int tv_sec, unsigned int tv_usec,
 439                                                  void *user_data)
 440 {
 441         tdm_vblank_wait_info *wait_info = user_data;
 442         tdm_private_vblank *private_vblank;
 443
 444         if (!_tdm_vblank_check_valid(wait_info)) {
 445                 TDM_DBG("can't find wait(%p) from valid_wait_list", wait_info);
 446                 return;
 447         }
 448
 449         private_vblank = wait_info->private_vblank;
 450         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 451
 452         if (!_tdm_vblank_find_wait(wait_info, &private_vblank->HW_wait_list)) {
 453                 VDB("can't find wait(%p)", wait_info);
 454                 return;
 455         }
 456
 457         LIST_DEL(&wait_info->link);
 458         LIST_DEL(&wait_info->valid_link);
 459
 460         private_vblank->last_seq = wait_info->target_seq;
 461         private_vblank->last_tv_sec = tv_sec;
 462         private_vblank->last_tv_usec = tv_usec;
 463
 464         if (wait_info->func)
 465                 wait_info->func(private_vblank, TDM_ERROR_NONE, private_vblank->last_seq,
 466                                                 tv_sec, tv_usec, wait_info->user_data);
 467
 468         VDB("wait(%p) done", wait_info);
 469
 470         free(wait_info);
 471 }
 472
 473 static tdm_error
 474 _tdm_vblank_wait_HW(tdm_vblank_wait_info *wait_info)
 475 {
 476         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 477         tdm_error ret;
 478
 479         TDM_RETURN_VAL_IF_FAIL(wait_info->target_hw_interval > 0, TDM_ERROR_OPERATION_FAILED);
 480
 481         _tdm_vblank_insert_wait(wait_info, &private_vblank->HW_wait_list);
 482
 483         ret = tdm_output_wait_vblank(private_vblank->output, wait_info->target_hw_interval, 0,
 484                                                                  _tdm_vblank_cb_vblank_HW, wait_info);
 485
 486         if (ret != TDM_ERROR_NONE) {
 487                 VER("wait(%p) failed", wait_info);
 488                 LIST_DEL(&wait_info->link);
 489                 return ret;
 490         }
 491
 492         VDB("wait(%p) waiting", wait_info);
 493
 494         return TDM_ERROR_NONE;
 495 }
 496
 497 static tdm_error
 498 _tdm_vblank_cb_vblank_SW(void *user_data)
 499 {
 500         tdm_private_vblank *private_vblank = user_data;
 501         tdm_vblank_wait_info *first_wait_info = NULL, *w = NULL, *ww = NULL;
 502
 503         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_OPERATION_FAILED);
 504
 505         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 506         TDM_RETURN_VAL_IF_FAIL(first_wait_info != NULL, TDM_ERROR_OPERATION_FAILED);
 507
 508         VDB("wait(%p) done", first_wait_info);
 509
 510         private_vblank->last_seq = first_wait_info->target_seq;
 511         private_vblank->last_tv_sec = first_wait_info->target_sec;
 512         private_vblank->last_tv_usec = first_wait_info->target_usec;
 513
 514         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_wait_list, link) {
 515                 if (w->target_sec != first_wait_info->target_sec ||
 516                         w->target_usec != first_wait_info->target_usec)
 517                         break;
 518
 519                 LIST_DEL(&w->link);
 520                 LIST_DEL(&w->valid_link);
 521
 522                 if (w->func)
 523                         w->func(private_vblank, TDM_ERROR_NONE, w->target_seq,
 524                                         w->target_sec, w->target_usec,
 525                                         w->user_data);
 526
 527                 free(w);
 528         }
 529
 530         return TDM_ERROR_NONE;
 531 }
 532
 533 static void
 534 _tdm_vblank_cb_vblank_SW_first(tdm_output *output, unsigned int sequence,
 535                                                            unsigned int tv_sec, unsigned int tv_usec,
 536                                                            void *user_data)
 537 {
 538         tdm_vblank_wait_info *wait_info = user_data;
 539         tdm_private_vblank *private_vblank;
 540         tdm_vblank_wait_info *w = NULL, *ww = NULL;
 541         unsigned int min_interval = 0;
 542         unsigned long last;
 543
 544         if (!_tdm_vblank_check_valid(wait_info))
 545                 return;
 546
 547         private_vblank = wait_info->private_vblank;
 548         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 549
 550         w = container_of((&private_vblank->SW_pending_wait_list)->next, w, link);
 551         TDM_RETURN_IF_FAIL(w != NULL);
 552
 553         VDB("wait(%p) done", w);
 554
 555         min_interval = w->interval;
 556
 557         last = (unsigned long)tv_sec * 1000000 + tv_usec;
 558         last -= private_vblank->offset * 1000;
 559
 560         private_vblank->last_seq = min_interval;
 561         private_vblank->last_tv_sec = last / 1000000;
 562         private_vblank->last_tv_usec = last % 1000000;
 563
 564         LIST_FOR_EACH_ENTRY_SAFE(w, ww, &private_vblank->SW_pending_wait_list, link) {
 565                 if (w->interval == min_interval) {
 566                         LIST_DEL(&w->link);
 567                         LIST_DEL(&w->valid_link);
 568
 569                         if (w->func)
 570                                 w->func(private_vblank, TDM_ERROR_NONE, private_vblank->last_seq,
 571                                                 tv_sec, tv_usec, w->user_data);
 572                         free(w);
 573                 } else {
 574                         LIST_DEL(&w->link);
 575                         w->interval -= min_interval;
 576                         _tdm_vblank_wait_SW(w);
 577                 }
 578         }
 579 }
 580
 581 static tdm_error
 582 _tdm_vblank_sw_timer_update(tdm_private_vblank *private_vblank)
 583 {
 584         tdm_vblank_wait_info *first_wait_info = NULL;
 585         unsigned long curr, target;
 586         int ms_delay;
 587         tdm_error ret;
 588
 589         first_wait_info = container_of(private_vblank->SW_wait_list.next, first_wait_info, link);
 590         curr = tdm_helper_get_time_in_micros();
 591         target = first_wait_info->target_sec * 1000000 + first_wait_info->target_usec;
 592
 593         if (target < curr)
 594                 ms_delay = 1;
 595         else
 596                 ms_delay = ceil((double)(target - curr) / 1000);
 597
 598         if (ms_delay < 1)
 599                 ms_delay = 1;
 600
 601         VDB("wait(%p) curr(%4lu) target(%4lu) ms_delay(%d)",
 602                 first_wait_info, curr, target, ms_delay);
 603
 604         ret = tdm_display_lock(private_vblank->dpy);
 605         TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
 606
 607         if (!private_vblank->SW_timer) {
 608                 private_vblank->SW_timer =
 609                         tdm_event_loop_add_timer_handler(private_vblank->dpy,
 610                                                                                          _tdm_vblank_cb_vblank_SW,
 611                                                                                          private_vblank,
 612                                                                                          &ret);
 613                 if (!private_vblank->SW_timer) {
 614                         tdm_display_unlock(private_vblank->dpy);
 615                         VER("couldn't add timer");
 616                         return ret;
 617                 }
 618                 VIN("Use SW vblank");
 619         }
 620
 621         ret = tdm_event_loop_source_timer_update(private_vblank->SW_timer, ms_delay);
 622         if (ret != TDM_ERROR_NONE) {
 623                 tdm_display_unlock(private_vblank->dpy);
 624                 VER("couldn't update timer");
 625                 return ret;
 626         }
 627
 628         tdm_display_unlock(private_vblank->dpy);
 629
 630         return TDM_ERROR_NONE;
 631 }
 632
 633 #if 0
 634 static void
 635 _tdm_vblank_cb_vblank_align(tdm_output *output, unsigned int sequence,
 636                                                         unsigned int tv_sec, unsigned int tv_usec,
 637                                                         void *user_data)
 638 {
 639         tdm_vblank_wait_info *align_info = user_data;
 640         tdm_private_vblank *private_vblank;
 641         unsigned int diff_sec, diff_usec;
 642
 643         if (!_tdm_vblank_check_valid(align_info))
 644                 return;
 645
 646         private_vblank = align_info->private_vblank;
 647         TDM_RETURN_IF_FAIL(private_vblank != NULL);
 648
 649         private_vblank->SW_align_wait = NULL;
 650         private_vblank->SW_align_sec = tv_sec;
 651         private_vblank->SW_align_usec = tv_usec;
 652
 653         LIST_DEL(&align_info->valid_link);
 654
 655         if (tv_usec > align_info->req_usec) {
 656                 diff_usec = tv_usec - align_info->req_usec;
 657                 diff_sec = tv_sec - align_info->req_sec;
 658         } else {
 659                 diff_usec = 1000000 + tv_usec - align_info->req_usec;
 660                 diff_sec = tv_sec - align_info->req_sec - 1;
 661         }
 662
 663         private_vblank->SW_align_offset = (double)(1000000 - diff_sec * 1000000 - diff_usec) / private_vblank->vrefresh;
 664
 665         free(align_info);
 666
 667         /* align vblank continously only if non HW and DPMS on */
 668         if (!private_vblank->HW_enable && private_vblank->dpms == TDM_OUTPUT_DPMS_ON)
 669                 _tdm_vblank_sw_timer_align(private_vblank);
 670 }
 671
 672 static void
 673 _tdm_vblank_sw_timer_align(tdm_private_vblank *private_vblank)
 674 {
 675         tdm_vblank_wait_info *align_info;
 676         unsigned long curr;
 677         tdm_error ret;
 678
 679         if (private_vblank->SW_align_wait)
 680                 return;
 681
 682         TDM_RETURN_IF_FAIL(private_vblank->dpms == TDM_OUTPUT_DPMS_ON);
 683
 684         align_info = calloc(1, sizeof *align_info);
 685         if (!align_info) {
 686                 VER("alloc failed");
 687                 return;
 688         }
 689
 690         LIST_ADDTAIL(&align_info->valid_link, &valid_wait_list);
 691         align_info->stamp = ++stamp;
 692         align_info->private_vblank = private_vblank;
 693
 694         curr = tdm_helper_get_time_in_micros();
 695         align_info->req_sec = curr / 1000000;
 696         align_info->req_usec = curr % 1000000;
 697
 698         ret = tdm_output_wait_vblank(private_vblank->output, private_vblank->vrefresh, 0,
 699                                                                  _tdm_vblank_cb_vblank_align, align_info);
 700         if (ret != TDM_ERROR_NONE) {
 701                 LIST_DEL(&align_info->valid_link);
 702                 free(align_info);
 703                 return;
 704         }
 705
 706         private_vblank->SW_align_wait = align_info;
 707 }
 708 #endif
 709
 710 static tdm_error
 711 _tdm_vblank_wait_SW(tdm_vblank_wait_info *wait_info)
 712 {
 713         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 714         tdm_error ret;
 715
 716         if (private_vblank->last_tv_sec == 0 && private_vblank->dpms == TDM_OUTPUT_DPMS_ON) {
 717                 unsigned int do_wait = LIST_IS_EMPTY(&private_vblank->SW_pending_wait_list);
 718                 _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_pending_wait_list);
 719                 if (do_wait) {
 720                         ret = tdm_output_wait_vblank(private_vblank->output, 1, 0,
 721                                                                                  _tdm_vblank_cb_vblank_SW_first, wait_info);
 722                         if (ret != TDM_ERROR_NONE) {
 723                                 LIST_DEL(&wait_info->link);
 724                                 return ret;
 725                         }
 726                         VDB("wait(%p) waiting", wait_info);
 727                 }
 728                 return TDM_ERROR_NONE;
 729         }
 730
 731         TDM_RETURN_VAL_IF_FAIL(wait_info->target_sec > 0, TDM_ERROR_OPERATION_FAILED);
 732
 733         _tdm_vblank_insert_wait(wait_info, &private_vblank->SW_wait_list);
 734
 735         ret = _tdm_vblank_sw_timer_update(private_vblank);
 736         if (ret != TDM_ERROR_NONE) {
 737                 VER("couldn't update sw timer");
 738                 return ret;
 739         }
 740
 741         return TDM_ERROR_NONE;
 742 }
 743
 744 static void
 745 _tdm_vblank_calculate_target(tdm_vblank_wait_info *wait_info)
 746 {
 747         tdm_private_vblank *private_vblank = wait_info->private_vblank;
 748         unsigned long last, prev, req, curr, target;
 749         unsigned int skip = 0;
 750
 751         curr = tdm_helper_get_time_in_micros();
 752
 753         if (!private_vblank->HW_enable) {
 754                 if (private_vblank->last_tv_sec == 0) {
 755                         /* If last == 0 and DPMS == on, we will use HW vblank to sync with HW vblank. */
 756                         if (private_vblank->dpms == TDM_OUTPUT_DPMS_ON) {
 757                                 return;
 758                         } else {
 759                                 private_vblank->last_tv_sec = curr / 1000000;
 760                                 private_vblank->last_tv_usec = curr % 1000000;
 761                         }
 762                 }
 763         }
 764
 765         /* last can be 0 when HW enable. But it doesn't matter if HW enable. */
 766         if (!private_vblank->HW_enable)
 767                 TDM_RETURN_IF_FAIL(private_vblank->last_tv_sec != 0);
 768
 769         last = (unsigned long)private_vblank->last_tv_sec * 1000000 + private_vblank->last_tv_usec;
 770         req = (unsigned long)wait_info->req_sec * 1000000 + wait_info->req_usec;
 771         skip = (unsigned int)((req - last) / private_vblank->vblank_gap);
 772         prev = last + skip * private_vblank->vblank_gap;
 773
 774         if (private_vblank->last_seq == 0)
 775                 skip = 0;
 776
 777         skip += wait_info->interval;
 778
 779         if (private_vblank->HW_enable) {
 780                 unsigned int hw_skip = (unsigned int)((curr - prev) / private_vblank->HW_vblank_gap);
 781
 782                 wait_info->target_hw_interval = wait_info->interval * private_vblank->HW_quotient;
 783                 wait_info->target_hw_interval -= hw_skip;
 784
 785                 if (wait_info->target_hw_interval < 1)
 786                         wait_info->target_hw_interval = 1;
 787
 788                 target = prev + wait_info->target_hw_interval * private_vblank->HW_vblank_gap;
 789         } else {
 790                 target = prev + (unsigned long)(private_vblank->vblank_gap * wait_info->interval);
 791
 792                 while (target < curr) {
 793                         target += (unsigned long)private_vblank->vblank_gap;
 794                         skip++;
 795                 }
 796         }
 797
 798         VDB("target_seq(%d) last_seq(%d) skip(%d)",
 799                 wait_info->target_seq, private_vblank->last_seq, skip);
 800
 801 #if 0
 802         target -= (private_vblank->SW_align_offset * skip * private_vblank->HW_quotient);
 803 #endif
 804
 805         wait_info->target_seq = private_vblank->last_seq + skip;
 806         wait_info->target_sec = target / 1000000;
 807         wait_info->target_usec = target % 1000000;
 808
 809         VDB("wait(%p) last(%4lu) req(%4lu) prev(%4lu) curr(%4lu) skip(%d) hw_interval(%d) target(%4lu,%4lu)",
 810                 wait_info, last, req - last, prev - last, curr - last,
 811                 skip, wait_info->target_hw_interval, target, target - last);
 812 }
 813
 814 tdm_error
 815 tdm_vblank_wait(tdm_vblank *vblank, unsigned int req_sec, unsigned int req_usec,
 816                                 unsigned int interval, tdm_vblank_handler func, void *user_data)
 817 {
 818         tdm_private_vblank *private_vblank = vblank;
 819         tdm_vblank_wait_info *wait_info;
 820         tdm_error ret;
 821
 822         TDM_RETURN_VAL_IF_FAIL(private_vblank != NULL, TDM_ERROR_INVALID_PARAMETER);
 823         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
 824
 825         if (private_vblank->dpms != TDM_OUTPUT_DPMS_ON && !private_vblank->enable_fake) {
 826                 VIN("can't wait a vblank because of DPMS off");
 827                 return TDM_ERROR_DPMS_OFF;
 828         }
 829
 830 #if 0
 831         if (!private_vblank->SW_align_wait && private_vblank->dpms == TDM_OUTPUT_DPMS_ON)
 832                 _tdm_vblank_sw_timer_align(private_vblank);
 833 #endif
 834
 835         if (private_vblank->check_HW_or_SW) {
 836                 private_vblank->check_HW_or_SW = 0;
 837                 private_vblank->vblank_gap = (double)1000000 / private_vblank->fps;
 838                 private_vblank->HW_quotient = private_vblank->vrefresh / private_vblank->fps;
 839
 840                 if (private_vblank->dpms == TDM_OUTPUT_DPMS_ON &&
 841                         !(private_vblank->vrefresh % private_vblank->fps)) {
 842                         private_vblank->HW_enable = 1;
 843                         VIN("Use HW vblank");
 844                 } else {
 845                         private_vblank->HW_enable = 0;
 846                         VIN("Use SW vblank");
 847                 }
 848         }
 849
 850         wait_info = calloc(1, sizeof *wait_info);
 851         if (!wait_info) {
 852                 VER("alloc failed");
 853                 return TDM_ERROR_OUT_OF_MEMORY;
 854         }
 855
 856         LIST_ADDTAIL(&wait_info->valid_link, &valid_wait_list);
 857         wait_info->stamp = ++stamp;
 858         wait_info->req_sec = req_sec;
 859         wait_info->req_usec = req_usec;
 860         wait_info->interval = interval;
 861         wait_info->func = func;
 862         wait_info->user_data = user_data;
 863         wait_info->private_vblank = private_vblank;
 864
 865         _tdm_vblank_calculate_target(wait_info);
 866
 867         if (private_vblank->HW_enable)
 868                 ret = _tdm_vblank_wait_HW(wait_info);
 869         else
 870                 ret = _tdm_vblank_wait_SW(wait_info);
 871
 872         if (ret != TDM_ERROR_NONE) {
 873                 LIST_DEL(&wait_info->valid_link);
 874                 free(wait_info);
 875                 return ret;
 876         }
 877
 878         return TDM_ERROR_NONE;
 879 }