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