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