src/tdm.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_backend.h"
  42 #include "tdm_private.h"
  43 #include "tdm_helper.h"
  44
  45 pthread_mutex_t tdm_mutex_check_lock = PTHREAD_MUTEX_INITIALIZER;
  46 int tdm_mutex_locked;
  47
  48 static tdm_private_layer *
  49 _tdm_display_find_private_layer(tdm_private_output *private_output,
  50                                                                 tdm_layer *layer_backend)
  51 {
  52         tdm_private_layer *private_layer = NULL;
  53
  54         LIST_FOR_EACH_ENTRY(private_layer, &private_output->layer_list, link) {
  55                 if (private_layer->layer_backend == layer_backend)
  56                         return private_layer;
  57         }
  58
  59         return NULL;
  60 }
  61
  62 static tdm_private_output *
  63 _tdm_display_find_private_output(tdm_private_display *private_display,
  64                                                                  tdm_output *output_backend)
  65 {
  66         tdm_private_output *private_output = NULL;
  67
  68         LIST_FOR_EACH_ENTRY(private_output, &private_display->output_list, link) {
  69                 if (private_output->output_backend == output_backend)
  70                         return private_output;
  71         }
  72
  73         return NULL;
  74 }
  75
  76 INTERN tdm_private_output *
  77 tdm_display_find_output_stamp(tdm_private_display *private_display, double stamp)
  78 {
  79         tdm_private_output *private_output = NULL;
  80
  81         LIST_FOR_EACH_ENTRY(private_output, &private_display->output_list, link) {
  82                 if (private_output->stamp == stamp)
  83                         return private_output;
  84         }
  85
  86         return NULL;
  87 }
  88
  89 static void
  90 _tdm_display_destroy_caps_pp(tdm_caps_pp *caps_pp)
  91 {
  92         if (caps_pp->formats)
  93                 free(caps_pp->formats);
  94
  95         memset(caps_pp, 0, sizeof(tdm_caps_pp));
  96 }
  97
  98 static void
  99 _tdm_display_destroy_caps_capture(tdm_caps_capture *caps_capture)
 100 {
 101         if (caps_capture->formats)
 102                 free(caps_capture->formats);
 103
 104         memset(caps_capture, 0, sizeof(tdm_caps_capture));
 105 }
 106
 107 static void
 108 _tdm_display_destroy_caps_layer(tdm_caps_layer *caps_layer)
 109 {
 110         if (caps_layer->formats)
 111                 free(caps_layer->formats);
 112
 113         if (caps_layer->props)
 114                 free(caps_layer->props);
 115
 116         memset(caps_layer, 0, sizeof(tdm_caps_layer));
 117 }
 118
 119 static void
 120 _tdm_display_destroy_caps_output(tdm_caps_output *caps_output)
 121 {
 122         if (caps_output->modes)
 123                 free(caps_output->modes);
 124
 125         if (caps_output->props)
 126                 free(caps_output->props);
 127
 128         memset(caps_output, 0, sizeof(tdm_caps_output));
 129 }
 130
 131 static void
 132 _tdm_display_destroy_private_layer(tdm_private_layer *private_layer)
 133 {
 134         tdm_private_capture *c = NULL, *cc = NULL;
 135
 136         LIST_DEL(&private_layer->link);
 137
 138         LIST_FOR_EACH_ENTRY_SAFE(c, cc, &private_layer->capture_list, link)
 139         tdm_capture_destroy_internal(c);
 140
 141         _tdm_display_destroy_caps_layer(&private_layer->caps);
 142
 143         free(private_layer);
 144 }
 145
 146 static void
 147 _tdm_display_destroy_private_output(tdm_private_output *private_output)
 148 {
 149         tdm_private_layer *l = NULL, *ll = NULL;
 150         tdm_private_capture *c = NULL, *cc = NULL;
 151         tdm_private_vblank_handler *v = NULL, *vv = NULL;
 152         tdm_private_commit_handler *m = NULL, *mm = NULL;
 153         tdm_private_change_handler *h = NULL, *hh = NULL;
 154
 155         LIST_DEL(&private_output->link);
 156
 157         free(private_output->layers_ptr);
 158
 159         LIST_FOR_EACH_ENTRY_SAFE(v, vv, &private_output->vblank_handler_list, link) {
 160                 LIST_DEL(&v->link);
 161                 free(v);
 162         }
 163
 164         LIST_FOR_EACH_ENTRY_SAFE(m, mm, &private_output->commit_handler_list, link) {
 165                 LIST_DEL(&m->link);
 166                 free(m);
 167         }
 168
 169         LIST_FOR_EACH_ENTRY_SAFE(h, hh, &private_output->change_handler_list_main, link) {
 170                 LIST_DEL(&h->link);
 171                 free(h);
 172         }
 173
 174         LIST_FOR_EACH_ENTRY_SAFE(h, hh, &private_output->change_handler_list_sub, link) {
 175                 LIST_DEL(&h->link);
 176                 free(h);
 177         }
 178
 179         LIST_FOR_EACH_ENTRY_SAFE(c, cc, &private_output->capture_list, link)
 180         tdm_capture_destroy_internal(c);
 181
 182         LIST_FOR_EACH_ENTRY_SAFE(l, ll, &private_output->layer_list, link)
 183         _tdm_display_destroy_private_layer(l);
 184
 185         _tdm_display_destroy_caps_output(&private_output->caps);
 186
 187         if (private_output->dpms_changed_timer)
 188                 tdm_event_loop_source_remove(private_output->dpms_changed_timer);
 189
 190         private_output->stamp = 0;
 191         free(private_output);
 192 }
 193
 194 static void
 195 _tdm_display_destroy_private_display(tdm_private_display *private_display)
 196 {
 197         tdm_private_output *o = NULL, *oo = NULL;
 198         tdm_private_pp *p = NULL, *pp = NULL;
 199
 200         free(private_display->outputs_ptr);
 201         if (private_display->outputs) {
 202                 free(private_display->outputs);
 203                 private_display->outputs = NULL;
 204         }
 205
 206         LIST_FOR_EACH_ENTRY_SAFE(p, pp, &private_display->pp_list, link)
 207         tdm_pp_destroy_internal(p);
 208
 209         LIST_FOR_EACH_ENTRY_SAFE(o, oo, &private_display->output_list, link)
 210         _tdm_display_destroy_private_output(o);
 211
 212         _tdm_display_destroy_caps_pp(&private_display->caps_pp);
 213         _tdm_display_destroy_caps_capture(&private_display->caps_capture);
 214
 215         private_display->capabilities = 0;
 216         private_display->caps_display.max_layer_count = 0;
 217 }
 218
 219 static tdm_error
 220 _tdm_display_update_caps_pp(tdm_private_display *private_display,
 221                                                         tdm_caps_pp *caps)
 222 {
 223         tdm_func_display *func_display = &private_display->func_display;
 224         tdm_error ret;
 225
 226         if (!(private_display->capabilities & TDM_DISPLAY_CAPABILITY_PP))
 227                 return TDM_ERROR_NONE;
 228
 229         if (!func_display->display_get_pp_capability) {
 230                 TDM_ERR("no display_get_pp_capability()");
 231                 return TDM_ERROR_BAD_MODULE;
 232         }
 233
 234         ret = func_display->display_get_pp_capability(private_display->bdata, caps);
 235         if (ret != TDM_ERROR_NONE) {
 236                 TDM_ERR("display_get_pp_capability() failed");
 237                 return TDM_ERROR_BAD_MODULE;
 238         }
 239
 240         return TDM_ERROR_NONE;
 241 }
 242
 243 static tdm_error
 244 _tdm_display_update_caps_capture(tdm_private_display *private_display,
 245                                                                  tdm_caps_capture *caps)
 246 {
 247         tdm_func_display *func_display = &private_display->func_display;
 248         tdm_error ret;
 249
 250         if (!(private_display->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE))
 251                 return TDM_ERROR_NONE;
 252
 253         if (!func_display->display_get_capture_capability) {
 254                 TDM_ERR("no display_get_capture_capability()");
 255                 return TDM_ERROR_BAD_MODULE;
 256         }
 257
 258         ret = func_display->display_get_capture_capability(private_display->bdata, caps);
 259         if (ret != TDM_ERROR_NONE) {
 260                 TDM_ERR("display_get_capture_capability() failed");
 261                 return TDM_ERROR_BAD_MODULE;
 262         }
 263
 264         return TDM_ERROR_NONE;
 265 }
 266
 267 static tdm_error
 268 _tdm_display_update_caps_layer(tdm_private_display *private_display,
 269                                                            tdm_layer *layer_backend, tdm_caps_layer *caps)
 270 {
 271         tdm_func_layer *func_layer = &private_display->func_layer;
 272         tdm_error ret;
 273
 274         if (!func_layer->layer_get_capability) {
 275                 TDM_ERR("no layer_get_capability()");
 276                 return TDM_ERROR_BAD_MODULE;
 277         }
 278
 279         ret = func_layer->layer_get_capability(layer_backend, caps);
 280         if (ret != TDM_ERROR_NONE) {
 281                 TDM_ERR("layer_get_capability() failed");
 282                 return TDM_ERROR_BAD_MODULE;
 283         }
 284
 285         return TDM_ERROR_NONE;
 286 }
 287
 288 static tdm_error
 289 _tdm_display_update_caps_output(tdm_private_display *private_display, int pipe,
 290                                                                 tdm_output *output_backend, tdm_caps_output *caps)
 291 {
 292         tdm_func_output *func_output = &private_display->func_output;
 293         char temp[TDM_NAME_LEN];
 294         tdm_error ret;
 295         double stamp;
 296
 297         if (!func_output->output_get_capability) {
 298                 TDM_ERR("no output_get_capability()");
 299                 return TDM_ERROR_BAD_MODULE;
 300         }
 301
 302         stamp = tdm_helper_get_time();
 303         ret = func_output->output_get_capability(output_backend, caps);
 304         TDM_DBG("backend output_get_capability() time: %.3f ms", (tdm_helper_get_time() - stamp) * 1000.0);
 305
 306         if (ret != TDM_ERROR_NONE) {
 307                 TDM_ERR("output_get_capability() failed");
 308                 return TDM_ERROR_BAD_MODULE;
 309         }
 310
 311         /* FIXME: Use model for tdm client to distinguish amoung outputs */
 312         snprintf(temp, TDM_NAME_LEN, "%s-%d", caps->model, pipe);
 313         snprintf(caps->model, TDM_NAME_LEN, "%s", temp);
 314
 315         return TDM_ERROR_NONE;
 316 }
 317
 318 static tdm_error
 319 _tdm_display_update_layer(tdm_private_display *private_display,
 320                                                   tdm_private_output *private_output,
 321                                                   tdm_layer *layer_backend, int index)
 322 {
 323         tdm_private_layer *private_layer;
 324         tdm_error ret;
 325
 326         private_layer = _tdm_display_find_private_layer(private_output, layer_backend);
 327         if (!private_layer) {
 328                 private_layer = calloc(1, sizeof(tdm_private_layer));
 329                 TDM_RETURN_VAL_IF_FAIL(private_layer != NULL, TDM_ERROR_OUT_OF_MEMORY);
 330
 331                 LIST_ADDTAIL(&private_layer->link, &private_output->layer_list);
 332                 private_layer->index = index;
 333                 private_layer->private_display = private_display;
 334                 private_layer->private_output = private_output;
 335                 private_layer->layer_backend = layer_backend;
 336
 337                 LIST_INITHEAD(&private_layer->capture_list);
 338
 339                 private_layer->usable = 1;
 340         } else
 341                 _tdm_display_destroy_caps_layer(&private_layer->caps);
 342
 343         ret = _tdm_display_update_caps_layer(private_display, layer_backend,
 344                                                                                  &private_layer->caps);
 345         if (ret != TDM_ERROR_NONE)
 346                 goto failed_update;
 347
 348         return TDM_ERROR_NONE;
 349 failed_update:
 350         _tdm_display_destroy_private_layer(private_layer);
 351         return ret;
 352 }
 353
 354 INTERN tdm_error
 355 tdm_display_update_output(tdm_private_display *private_display,
 356                                                   tdm_output *output_backend, int pipe)
 357 {
 358         tdm_func_output *func_output = &private_display->func_output;
 359         tdm_private_output *private_output = NULL;
 360         tdm_layer **layers = NULL;
 361         int layer_count = 0, i;
 362         tdm_error ret;
 363
 364         private_output = _tdm_display_find_private_output(private_display, output_backend);
 365         if (!private_output) {
 366                 private_output = calloc(1, sizeof(tdm_private_output));
 367                 TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_OUT_OF_MEMORY);
 368
 369                 private_output->stamp = tdm_helper_get_time();
 370                 while (tdm_display_find_output_stamp(private_display, private_output->stamp))
 371                         private_output->stamp++;
 372
 373                 LIST_ADDTAIL(&private_output->link, &private_display->output_list);
 374
 375                 private_output->private_display = private_display;
 376                 private_output->current_dpms_value = TDM_OUTPUT_DPMS_OFF;
 377                 private_output->output_backend = output_backend;
 378                 private_output->pipe = pipe;
 379                 private_output->index = pipe;
 380
 381                 LIST_INITHEAD(&private_output->layer_list);
 382                 LIST_INITHEAD(&private_output->capture_list);
 383                 LIST_INITHEAD(&private_output->vblank_handler_list);
 384                 LIST_INITHEAD(&private_output->commit_handler_list);
 385                 LIST_INITHEAD(&private_output->change_handler_list_main);
 386                 LIST_INITHEAD(&private_output->change_handler_list_sub);
 387
 388                 if (func_output->output_set_status_handler) {
 389                         func_output->output_set_status_handler(private_output->output_backend,
 390                                                                                                    tdm_output_cb_status,
 391                                                                                                    private_output);
 392                         private_output->regist_change_cb = 1;
 393                 }
 394
 395                 ret = _tdm_display_update_caps_output(private_display, pipe, output_backend,
 396                                                                                           &private_output->caps);
 397                 if (ret != TDM_ERROR_NONE)
 398                         return ret;
 399         } else {
 400                 tdm_caps_output new_caps;
 401
 402                 ret = _tdm_display_update_caps_output(private_display, pipe, output_backend,
 403                                                                                           &new_caps);
 404                 if (ret != TDM_ERROR_NONE)
 405                         return ret;
 406
 407                 /* FIXME: This is very ugly. need to fix after the TDM ABI is changed. */
 408                 if (private_output->caps.status != new_caps.status) {
 409                         _tdm_display_destroy_caps_output(&private_output->caps);
 410                         private_output->caps = new_caps;
 411                         private_output->current_mode = NULL;
 412                 } else {
 413                         tdm_output_mode *old_modes = private_output->caps.modes;
 414                         unsigned int old_mode_count = private_output->caps.mode_count;
 415                         if (new_caps.modes)
 416                                 free(new_caps.modes);
 417                         new_caps.modes = old_modes;
 418                         new_caps.mode_count = old_mode_count;
 419                         if (private_output->caps.props)
 420                                 free(private_output->caps.props);
 421                         private_output->caps = new_caps;
 422                 }
 423         }
 424
 425         layers = func_output->output_get_layers(output_backend, &layer_count, &ret);
 426         if (ret != TDM_ERROR_NONE)
 427                 goto failed_update;
 428
 429         for (i = 0; i < layer_count; i++) {
 430                 ret = _tdm_display_update_layer(private_display, private_output, layers[i], i);
 431                 if (ret != TDM_ERROR_NONE)
 432                         goto failed_update;
 433         }
 434
 435         free(layers);
 436
 437         return TDM_ERROR_NONE;
 438 failed_update:
 439         _tdm_display_destroy_private_output(private_output);
 440         free(layers);
 441         return ret;
 442 }
 443
 444 static tdm_output **
 445 _tdm_display_set_main_first(tdm_output **outputs, int index)
 446 {
 447         tdm_output *output_tmp = NULL;
 448
 449         if (index == 0)
 450                 return outputs;
 451
 452         output_tmp = outputs[0];
 453         outputs[0] = outputs[index];
 454         outputs[index] = output_tmp;
 455
 456         return outputs;
 457 }
 458
 459 static tdm_output **
 460 _tdm_display_get_ordered_outputs(tdm_private_display *private_display, int *count)
 461 {
 462         tdm_func_display *func_display = &private_display->func_display;
 463         tdm_output **outputs = NULL;
 464         tdm_output **new_outputs = NULL;
 465         tdm_output *output_dsi = NULL;
 466         tdm_output *output_lvds = NULL;
 467         tdm_output *output_hdmia = NULL;
 468         tdm_output *output_hdmib = NULL;
 469         int i, output_count = 0, output_connected_count = 0;
 470         int index_dsi = 0, index_lvds = 0, index_hdmia = 0, index_hdmib = 0;
 471         tdm_error ret;
 472
 473         /* don't change list order if not init time */
 474         if (private_display->outputs)
 475                 return private_display->outputs;
 476
 477         outputs = func_display->display_get_outputs(private_display->bdata, &output_count, &ret);
 478         if (ret != TDM_ERROR_NONE)
 479                 goto failed_get_outputs;
 480
 481         *count = output_count;
 482
 483         if (output_count == 0)
 484                 goto failed_get_outputs;
 485         else if (output_count == 1) {
 486                 private_display->outputs = outputs;
 487                 return outputs;
 488         }
 489
 490         /* count connected outputs */
 491         for (i = 0; i < output_count; i++) {
 492                 tdm_func_output *func_output = &private_display->func_output;
 493                 tdm_caps_output caps;
 494                 memset(&caps, 0, sizeof(tdm_caps_output));
 495
 496                 if (!func_output->output_get_capability) {
 497                         TDM_ERR("no output_get_capability()");
 498                         goto failed_get_outputs;
 499                 }
 500
 501                 ret = func_output->output_get_capability(outputs[i], &caps);
 502                 if (ret != TDM_ERROR_NONE) {
 503                         TDM_ERR("output_get_capability() failed");
 504                         goto failed_get_outputs;
 505                 }
 506
 507                 if (caps.status == TDM_OUTPUT_CONN_STATUS_CONNECTED) {
 508                         output_connected_count++;
 509
 510                         switch (caps.type) {
 511                         case TDM_OUTPUT_TYPE_DSI:
 512                                 output_dsi = outputs[i];
 513                                 index_dsi = i;
 514                                 break;
 515                         case TDM_OUTPUT_TYPE_LVDS:
 516                                 output_lvds = outputs[i];
 517                                 index_lvds = i;
 518                                 break;
 519                         case TDM_OUTPUT_TYPE_HDMIA:
 520                                 output_hdmia = outputs[i];
 521                                 index_hdmia = i;
 522                                 break;
 523                         case TDM_OUTPUT_TYPE_HDMIB:
 524                                 output_hdmib = outputs[i];
 525                                 index_hdmib = i;
 526                                 break;
 527                         default:
 528                                 break;
 529                         }
 530                 }
 531
 532                 _tdm_display_destroy_caps_output(&caps);
 533         }
 534
 535         /* ordering : main output is first */
 536         /* If there is no connected output, lvds or dsi cannot be main display. (cannot connect after booting)
 537           * But hdmi is possible, so set hdmi to main display.
 538           * If connected only one output, it is main output.
 539           * If connected outputs over 2, has priority like below.
 540           * (dsi > lvds > hdmi > else)
 541           */
 542         if (output_connected_count == 0) {
 543                 /* hdmi > dsi > lvds > else */
 544                 if (output_hdmia != NULL)
 545                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmia);
 546                 else if (output_hdmib != NULL)
 547                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmib);
 548                 else if (output_dsi != NULL)
 549                         new_outputs = _tdm_display_set_main_first(outputs, index_dsi);
 550                 else if (output_lvds != NULL)
 551                         new_outputs = _tdm_display_set_main_first(outputs, index_lvds);
 552                 else
 553                         new_outputs = outputs;
 554         } else { /* (output_connected_count > 1) */
 555                 /* dsi > lvds > hdmi > else */
 556                 if (output_dsi != NULL)
 557                         new_outputs = _tdm_display_set_main_first(outputs, index_dsi);
 558                 else if (output_lvds != NULL)
 559                         new_outputs = _tdm_display_set_main_first(outputs, index_lvds);
 560                 else if (output_hdmia != NULL)
 561                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmia);
 562                 else if (output_hdmib != NULL)
 563                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmib);
 564                 else
 565                         new_outputs = outputs;
 566         }
 567
 568         private_display->outputs = new_outputs;
 569
 570         return new_outputs;
 571
 572 failed_get_outputs:
 573         free(outputs);
 574         *count = 0;
 575         return NULL;
 576 }
 577
 578 static tdm_error
 579 _tdm_display_update_internal(tdm_private_display *private_display,
 580                                                          int only_display)
 581 {
 582         tdm_output **outputs = NULL;
 583         int output_count = 0, i;
 584         tdm_error ret = TDM_ERROR_NONE;
 585
 586         LIST_INITHEAD(&private_display->output_list);
 587         LIST_INITHEAD(&private_display->pp_list);
 588         LIST_INITHEAD(&private_display->capture_list);
 589
 590         if (!only_display) {
 591                 ret = _tdm_display_update_caps_pp(private_display, &private_display->caps_pp);
 592                 if (ret != TDM_ERROR_NONE)
 593                         goto failed_update;
 594
 595                 ret = _tdm_display_update_caps_capture(private_display,
 596                                                                                            &private_display->caps_capture);
 597                 if (ret != TDM_ERROR_NONE)
 598                         goto failed_update;
 599         }
 600
 601         outputs = _tdm_display_get_ordered_outputs(private_display, &output_count);
 602         if (!outputs)
 603                 goto failed_update;
 604
 605         for (i = 0; i < output_count; i++) {
 606                 ret = tdm_display_update_output(private_display, outputs[i], i);
 607                 if (ret != TDM_ERROR_NONE)
 608                         goto failed_update;
 609         }
 610
 611         return TDM_ERROR_NONE;
 612
 613 failed_update:
 614         _tdm_display_destroy_private_display(private_display);
 615         return ret;
 616 }
 617
 618 EXTERN tdm_error
 619 tdm_display_update(tdm_display *dpy)
 620 {
 621         tdm_private_display *private_display;
 622         tdm_error ret;
 623
 624         TDM_RETURN_VAL_IF_FAIL(dpy != NULL, TDM_ERROR_INVALID_PARAMETER);
 625
 626         private_display = dpy;
 627         _pthread_mutex_lock(&private_display->lock);
 628
 629         ret = _tdm_display_update_internal(private_display, 1);
 630
 631         _pthread_mutex_unlock(&private_display->lock);
 632
 633         return ret;
 634 }
 635
 636 #define SUFFIX_MODULE    ".so"
 637 #define DEFAULT_MODULE   "libtdm-default"SUFFIX_MODULE
 638
 639 int tdm_debug_module;
 640 int tdm_debug_dump;
 641
 642 static tdm_private_display *g_private_display;
 643 static pthread_mutex_t gLock = PTHREAD_MUTEX_INITIALIZER;
 644
 645 static tdm_error
 646 _tdm_display_check_module(tdm_backend_module *module)
 647 {
 648         int major, minor;
 649
 650         TDM_INFO("TDM ABI version : %d.%d",
 651                          TDM_MAJOR_VERSION, TDM_MINOR_VERSION);
 652
 653         if (!module->name) {
 654                 TDM_ERR("TDM backend doesn't have name");
 655                 return TDM_ERROR_BAD_MODULE;
 656         }
 657
 658         if (!module->vendor) {
 659                 TDM_ERR("TDM backend doesn't have vendor");
 660                 return TDM_ERROR_BAD_MODULE;
 661         }
 662
 663         major = TDM_BACKEND_GET_ABI_MAJOR(module->abi_version);
 664         minor = TDM_BACKEND_GET_ABI_MINOR(module->abi_version);
 665
 666         TDM_INFO("TDM module name: %s", module->name);
 667         TDM_INFO("'%s' vendor: %s", module->name, module->vendor);
 668         TDM_INFO("'%s' version: %d.%d", module->name, major, minor);
 669
 670         if (major != TDM_MAJOR_VERSION) {
 671                 TDM_ERR("'%s' major version mismatch, %d != %d",
 672                                 module->name, major, TDM_MAJOR_VERSION);
 673                 return TDM_ERROR_BAD_MODULE;
 674         }
 675
 676         if (minor > TDM_MINOR_VERSION) {
 677                 TDM_ERR("'%s' minor version(%d) is newer than %d",
 678                                 module->name, minor, TDM_MINOR_VERSION);
 679                 return TDM_ERROR_BAD_MODULE;
 680         }
 681
 682         if (!module->init) {
 683                 TDM_ERR("'%s' doesn't have init function", module->name);
 684                 return TDM_ERROR_BAD_MODULE;
 685         }
 686
 687         if (!module->deinit) {
 688                 TDM_ERR("'%s' doesn't have deinit function", module->name);
 689                 return TDM_ERROR_BAD_MODULE;
 690         }
 691
 692         return TDM_ERROR_NONE;
 693 }
 694
 695 static tdm_error
 696 _tdm_display_check_backend_functions(tdm_private_display *private_display)
 697 {
 698         tdm_func_display *func_display = &private_display->func_display;
 699         tdm_func_output *func_output = &private_display->func_output;
 700         tdm_func_layer *func_layer = &private_display->func_layer;
 701         tdm_error ret;
 702
 703         /* below functions should be implemented in backend side */
 704
 705         TDM_RETURN_VAL_IF_FAIL(func_display != NULL, TDM_ERROR_BAD_MODULE);
 706         TDM_RETURN_VAL_IF_FAIL(func_display->display_get_outputs, TDM_ERROR_BAD_MODULE);
 707         TDM_RETURN_VAL_IF_FAIL(func_output->output_get_capability, TDM_ERROR_BAD_MODULE);
 708         TDM_RETURN_VAL_IF_FAIL(func_output->output_get_layers, TDM_ERROR_BAD_MODULE);
 709         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_get_capability, TDM_ERROR_BAD_MODULE);
 710
 711         ret = func_display->display_get_capability(private_display->bdata, &private_display->caps_display);
 712         if (ret != TDM_ERROR_NONE) {
 713                 TDM_ERR("display_get_capability() failed");
 714                 return TDM_ERROR_BAD_MODULE;
 715         }
 716
 717         if (private_display->capabilities & TDM_DISPLAY_CAPABILITY_PP) {
 718                 tdm_func_pp *func_pp = &private_display->func_pp;
 719                 TDM_RETURN_VAL_IF_FAIL(func_display->display_get_pp_capability, TDM_ERROR_BAD_MODULE);
 720                 TDM_RETURN_VAL_IF_FAIL(func_display->display_create_pp, TDM_ERROR_BAD_MODULE);
 721                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_destroy, TDM_ERROR_BAD_MODULE);
 722                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_commit, TDM_ERROR_BAD_MODULE);
 723                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_set_done_handler, TDM_ERROR_BAD_MODULE);
 724         }
 725
 726         if (private_display->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE) {
 727                 tdm_func_capture *func_capture = &private_display->func_capture;
 728                 TDM_RETURN_VAL_IF_FAIL(func_display->display_get_capture_capability, TDM_ERROR_BAD_MODULE);
 729                 if (private_display->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_OUTPUT)
 730                         TDM_RETURN_VAL_IF_FAIL(func_output->output_create_capture, TDM_ERROR_BAD_MODULE);
 731                 if (private_display->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_LAYER)
 732                         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_create_capture, TDM_ERROR_BAD_MODULE);
 733                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_destroy, TDM_ERROR_BAD_MODULE);
 734                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_commit, TDM_ERROR_BAD_MODULE);
 735                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_set_done_handler, TDM_ERROR_BAD_MODULE);
 736         }
 737
 738         return TDM_ERROR_NONE;
 739 }
 740
 741 static tdm_error
 742 _tdm_display_load_module_with_file(tdm_private_display *private_display,
 743                                                                    const char *file)
 744 {
 745         char path[PATH_MAX] = {0,};
 746         tdm_backend_module *module_data;
 747         void *module;
 748         tdm_error ret;
 749         double stamp;
 750
 751         snprintf(path, sizeof(path), TDM_MODULE_PATH "/%s", file);
 752
 753         stamp = tdm_helper_get_time();
 754         TDM_TRACE_BEGIN(Load_Backend);
 755
 756         module = dlopen(path, RTLD_LAZY);
 757         if (!module) {
 758                 TDM_ERR("failed to load module: %s(%s)", dlerror(), file);
 759                 TDM_TRACE_END();
 760                 return TDM_ERROR_BAD_MODULE;
 761         }
 762
 763         module_data = dlsym(module, "tdm_backend_module_data");
 764         if (!module_data) {
 765                 TDM_ERR("'%s' doesn't have data object", file);
 766                 ret = TDM_ERROR_BAD_MODULE;
 767                 TDM_TRACE_END();
 768                 goto failed_load;
 769         }
 770
 771         TDM_DBG("dlopen, dlsym time: %.3f ms", (tdm_helper_get_time() - stamp) * 1000.0);
 772
 773         private_display->module_data = module_data;
 774         private_display->module = module;
 775
 776         /* check if version, init() and deinit() are valid or not */
 777         ret = _tdm_display_check_module(module_data);
 778         if (ret != TDM_ERROR_NONE)
 779                 goto failed_load;
 780
 781         TDM_TRACE_END();
 782
 783         /* We don't care if backend_data is NULL or not. It's up to backend. */
 784         TDM_TRACE_BEGIN(Init_Backend);
 785         stamp = tdm_helper_get_time();
 786         private_display->bdata = module_data->init((tdm_display *)private_display, &ret);
 787         TDM_DBG("backend init() time: %.3f ms", (tdm_helper_get_time() - stamp) * 1000.0);
 788         TDM_TRACE_END();
 789
 790         if (ret != TDM_ERROR_NONE) {
 791                 TDM_ERR("failed to init '%s' module", module_data->name);
 792                 goto failed_load;
 793         }
 794
 795         ret = _tdm_display_check_backend_functions(private_display);
 796         if (ret != TDM_ERROR_NONE) {
 797                 module_data->deinit(private_display->bdata);
 798                 private_display->bdata = NULL;
 799                 goto failed_load;
 800         }
 801
 802         TDM_INFO("Success to load '%s' module", module_data->name);
 803
 804         return TDM_ERROR_NONE;
 805 failed_load:
 806         dlclose(module);
 807         private_display->module_data = NULL;
 808         private_display->module = NULL;
 809         return ret;
 810 }
 811
 812 static tdm_error
 813 _tdm_display_load_module(tdm_private_display *private_display)
 814 {
 815         const char *module_name;
 816         struct dirent **namelist;
 817         int n;
 818         tdm_error ret = 0;
 819
 820         module_name = getenv("TDM_MODULE");
 821         if (!module_name)
 822                 module_name = DEFAULT_MODULE;
 823
 824         /* load bufmgr priv from default lib */
 825         ret = _tdm_display_load_module_with_file(private_display, module_name);
 826         if (ret == TDM_ERROR_NONE)
 827                 return TDM_ERROR_NONE;
 828
 829         /* load bufmgr priv from configured path */
 830         n = scandir(TDM_MODULE_PATH, &namelist, 0, alphasort);
 831         if (n < 0) {
 832                 TDM_ERR("no module in '%s'\n", TDM_MODULE_PATH);
 833                 return TDM_ERROR_BAD_MODULE;
 834         }
 835
 836         ret = TDM_ERROR_BAD_MODULE;
 837         while (n--) {
 838                 if (ret < 0 && strstr(namelist[n]->d_name, SUFFIX_MODULE))
 839                         ret = _tdm_display_load_module_with_file(private_display, namelist[n]->d_name);
 840
 841                 free(namelist[n]);
 842         }
 843         free(namelist);
 844
 845         return ret;
 846 }
 847
 848 static void
 849 _tdm_display_unload_module(tdm_private_display *private_display)
 850 {
 851         if (private_display->module_data)
 852                 private_display->module_data->deinit(private_display->bdata);
 853         if (private_display->module)
 854                 dlclose(private_display->module);
 855
 856         private_display->bdata = NULL;
 857         private_display->module_data = NULL;
 858         private_display->module = NULL;
 859 }
 860
 861 EXTERN tdm_display *
 862 tdm_display_init(tdm_error *error)
 863 {
 864         tdm_private_display *private_display = NULL;
 865         const char *debug;
 866         tdm_error ret;
 867         double stamp1, stamp2, start;
 868
 869         _pthread_mutex_lock(&gLock);
 870
 871         if (g_private_display) {
 872                 g_private_display->init_count++;
 873                 _pthread_mutex_unlock(&gLock);
 874                 if (error)
 875                         *error = TDM_ERROR_NONE;
 876                 return g_private_display;
 877         }
 878
 879         start = stamp1 = tdm_helper_get_time();
 880
 881         private_display = calloc(1, sizeof(tdm_private_display));
 882         if (!private_display) {
 883                 ret = TDM_ERROR_OUT_OF_MEMORY;
 884                 TDM_ERR("'private_display != NULL' failed");
 885                 goto failed_alloc;
 886         }
 887
 888         debug = getenv("TDM_DEBUG_MODULE");
 889         if (debug)
 890                 tdm_display_enable_debug_module(debug);
 891
 892         debug = getenv("TDM_DEBUG_DUMP");
 893         if (debug)
 894                 tdm_display_enable_dump(private_display, debug, NULL, NULL);
 895
 896         debug = getenv("TDM_DEBUG_PATH");
 897         if (debug)
 898                 tdm_display_enable_path(debug);
 899
 900         if (pthread_mutex_init(&private_display->lock, NULL)) {
 901                 ret = TDM_ERROR_OPERATION_FAILED;
 902                 TDM_ERR("mutex init failed: %m");
 903                 goto failed_mutex_init;
 904         }
 905
 906         _pthread_mutex_lock(&private_display->lock);
 907
 908         stamp2 = tdm_helper_get_time();
 909         TDM_DBG("prepare init time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 910         stamp1 = stamp2;
 911
 912         ret = tdm_event_loop_init(private_display);
 913         if (ret != TDM_ERROR_NONE)
 914                 goto failed_event;
 915
 916         stamp2 = tdm_helper_get_time();
 917         TDM_DBG("creating event loop time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 918         stamp1 = stamp2;
 919
 920         ret = _tdm_display_load_module(private_display);
 921         if (ret != TDM_ERROR_NONE)
 922                 goto failed_load;
 923
 924         stamp2 = tdm_helper_get_time();
 925         TDM_DBG("loading backend time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 926         stamp1 = stamp2;
 927
 928 #ifdef INIT_BUFMGR
 929         int tdm_drm_fd = tdm_helper_get_fd("TDM_DRM_MASTER_FD");
 930         if (tdm_drm_fd >= 0) {
 931                 private_display->bufmgr = tbm_bufmgr_init(tdm_drm_fd);
 932                 close(tdm_drm_fd);
 933                 if (!private_display->bufmgr) {
 934                         TDM_ERR("tbm_bufmgr_init failed");
 935                         goto failed_update;
 936                 } else {
 937                         TDM_INFO("tbm_bufmgr_init successed");
 938                 }
 939
 940                 stamp2 = tdm_helper_get_time();
 941                 TDM_DBG("initializing bufmgr time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 942                 stamp1 = stamp2;
 943         }
 944 #endif
 945
 946         TDM_TRACE_BEGIN(Update_Display);
 947         ret = _tdm_display_update_internal(private_display, 0);
 948         TDM_TRACE_END();
 949         if (ret != TDM_ERROR_NONE)
 950                 goto failed_update;
 951
 952         stamp2 = tdm_helper_get_time();
 953         TDM_DBG("updating display time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 954         stamp1 = stamp2;
 955
 956         tdm_event_loop_create_backend_source(private_display);
 957
 958         private_display->init_count = 1;
 959
 960         g_private_display = private_display;
 961
 962         if (error)
 963                 *error = TDM_ERROR_NONE;
 964
 965         _pthread_mutex_unlock(&private_display->lock);
 966         _pthread_mutex_unlock(&gLock);
 967
 968         TDM_INFO("init time: %.3f ms", (tdm_helper_get_time() - start) * 1000.0);
 969
 970         return (tdm_display *)private_display;
 971
 972 failed_update:
 973         _tdm_display_unload_module(private_display);
 974 failed_load:
 975         tdm_event_loop_deinit(private_display);
 976 failed_event:
 977         _pthread_mutex_unlock(&private_display->lock);
 978         pthread_mutex_destroy(&private_display->lock);
 979 failed_mutex_init:
 980         free(private_display);
 981 failed_alloc:
 982         if (error)
 983                 *error = ret;
 984         _pthread_mutex_unlock(&gLock);
 985         return NULL;
 986 }
 987
 988 EXTERN void
 989 tdm_display_deinit(tdm_display *dpy)
 990 {
 991         tdm_private_display *private_display = dpy;
 992
 993         if (!private_display)
 994                 return;
 995
 996         _pthread_mutex_lock(&gLock);
 997
 998         private_display->init_count--;
 999         if (private_display->init_count > 0) {
1000                 _pthread_mutex_unlock(&gLock);
1001                 return;
1002         }
1003
1004         /* dont move the position of lock/unlock. all resource should be protected
1005          * during destroying. after tdm_event_loop_deinit, we don't worry about thread
1006          * things because it's finalized.
1007          */
1008         _pthread_mutex_lock(&private_display->lock);
1009         tdm_event_loop_deinit(private_display);
1010         _pthread_mutex_unlock(&private_display->lock);
1011
1012         _tdm_display_destroy_private_display(private_display);
1013         _tdm_display_unload_module(private_display);
1014
1015 #ifdef INIT_BUFMGR
1016         if (private_display->bufmgr)
1017                 tbm_bufmgr_deinit(private_display->bufmgr);
1018 #endif
1019
1020         tdm_helper_set_fd("TDM_DRM_MASTER_FD", -1);
1021
1022         pthread_mutex_destroy(&private_display->lock);
1023         free(private_display);
1024         g_private_display = NULL;
1025
1026         if (tdm_debug_dump_dir) {
1027                 free(tdm_debug_dump_dir);
1028                 tdm_debug_dump_dir = NULL;
1029         }
1030
1031         _pthread_mutex_unlock(&gLock);
1032
1033         TDM_INFO("done");
1034 }
1035
1036 INTERN int
1037 tdm_display_check_module_abi(tdm_private_display *private_display, int abimaj, int abimin)
1038 {
1039         tdm_backend_module *module = private_display->module_data;
1040
1041         if (TDM_BACKEND_GET_ABI_MAJOR(module->abi_version) < abimaj)
1042                 return 0;
1043
1044         if (TDM_BACKEND_GET_ABI_MINOR(module->abi_version) < abimin)
1045                 return 0;
1046
1047         return 1;
1048 }
1049
1050 INTERN tdm_error
1051 tdm_display_enable_debug_module(const char*modules)
1052 {
1053         char temp[TDM_PATH_LEN];
1054         char *arg;
1055         char *end;
1056
1057         snprintf(temp, TDM_PATH_LEN, "%s", modules);
1058
1059         tdm_debug_module = 0;
1060
1061         arg = strtok_r(temp, TDM_DELIM, &end);
1062         while (arg) {
1063                 if (!strncmp(arg, "none", 4)) {
1064                         tdm_debug_module = 0;
1065                         return TDM_ERROR_NONE;
1066                 }
1067                 if (!strncmp(arg, "all", 3)) {
1068                         tdm_debug_module = 0xFFFFFFFF;
1069                         return TDM_ERROR_NONE;
1070                 }
1071                 if (!strncmp(arg, "buffer", 6))
1072                         tdm_debug_module |= TDM_DEBUG_BUFFER;
1073                 else if (!strncmp(arg, "thread", 6))
1074                         tdm_debug_module |= TDM_DEBUG_THREAD;
1075                 else if (!strncmp(arg, "mutex", 5))
1076                         tdm_debug_module |= TDM_DEBUG_MUTEX;
1077                 else if (!strncmp(arg, "vblank", 6))
1078                         tdm_debug_module |= TDM_DEBUG_VBLANK;
1079                 else
1080                         return TDM_ERROR_BAD_REQUEST;
1081
1082                 arg = strtok_r(NULL, TDM_DELIM, &end);
1083         }
1084
1085         TDM_INFO("module debugging... '%s'", modules);
1086
1087         return TDM_ERROR_NONE;
1088 }
1089
1090 INTERN tdm_error
1091 tdm_display_enable_dump(tdm_private_display *private_display, const char *dump_str, char *reply, int *len)
1092 {
1093         char temp[TDM_PATH_LEN] = {0,}, temp2[TDM_PATH_LEN] = {0,};
1094         char *path = NULL, *path2;
1095         char *arg;
1096         char *end;
1097
1098         snprintf(temp2, TDM_PATH_LEN, "%s", dump_str);
1099         path2 = strtostr(temp, TDM_PATH_LEN, temp2, "@");
1100         if (!path2 || path2[0] == '\0')
1101                 path2 = TDM_DUMP_DIR;
1102         else
1103                 path2++;
1104
1105         tdm_debug_dump = 0;
1106
1107         snprintf(temp, sizeof(temp), "%s", dump_str);
1108         arg = strtok_r(temp, ",", &end);
1109         TDM_GOTO_IF_FAIL(arg != NULL, done);
1110
1111         if (!strncmp(arg, "none", 4)) {
1112                 tdm_debug_dump = 0;
1113                 TDM_SNPRINTF(reply, len, "path: %s\n", (tdm_debug_dump_dir) ? : "unknown");
1114                 if (tdm_debug_dump_dir) {
1115                         free(tdm_debug_dump_dir);
1116                         tdm_debug_dump_dir = NULL;
1117                 }
1118                 goto done;
1119         }
1120
1121         path = tdm_helper_dump_make_directory(path2, reply, len);
1122         TDM_GOTO_IF_FAIL(path != NULL, done);
1123
1124         if (!strncmp(arg, "current", 7)) {
1125                 tdm_private_output *o = NULL;
1126                 if (!private_display) {
1127                         TDM_WRN("no private_display");
1128                         goto done;
1129                 }
1130
1131                 LIST_FOR_EACH_ENTRY(o, &private_display->output_list, link) {
1132                         tdm_private_layer *l = NULL;
1133                         LIST_FOR_EACH_ENTRY(l, &o->layer_list, link) {
1134                                 char str[TDM_PATH_LEN];
1135                                 if (l->usable || l->caps.capabilities & TDM_LAYER_CAPABILITY_VIDEO)
1136                                         continue;
1137                                 snprintf(str, TDM_PATH_LEN, "layer_%d_%d", o->index, l->index);
1138                                 tdm_helper_dump_buffer_str(l->showing_buffer, path, str);
1139                         }
1140                 }
1141
1142                 TDM_SNPRINTF(reply, len, "path: %s\n", path);
1143                 goto done;
1144         }
1145
1146         TDM_SNPRINTF(reply, len, "dump: %s\n", arg);
1147
1148         while (arg) {
1149                 if (!strncmp(arg, "all", 3)) {
1150                         tdm_debug_dump = 0xFFFFFFFF;
1151                         goto done;
1152                 } else if (!strncmp(arg, "layer", 5)) {
1153                         tdm_debug_dump |= TDM_DUMP_FLAG_LAYER;
1154                 } else if (!strncmp(arg, "pp", 2)) {
1155                         tdm_debug_dump |= TDM_DUMP_FLAG_PP;
1156                 } else if (!strncmp(arg, "capture", 7)) {
1157                         tdm_debug_dump |= TDM_DUMP_FLAG_CAPTURE;
1158                 } else
1159                         goto done;
1160
1161                 arg = strtok_r(NULL, ",", &end);
1162         }
1163
1164         if (tdm_debug_dump_dir)
1165                 free(tdm_debug_dump_dir);
1166
1167         tdm_debug_dump_dir = strndup(path, TDM_PATH_LEN);
1168
1169         TDM_INFO("dump... '%s'", dump_str);
1170
1171 done:
1172         if (path)
1173                 free(path);
1174
1175         return TDM_ERROR_NONE;
1176 }
1177
1178 INTERN tdm_error
1179 tdm_display_enable_path(const char *path)
1180 {
1181         static int old_stdout = -1;
1182         char fd_name[TDM_PATH_LEN];
1183         int  log_fd = -1;
1184         FILE *log_fl;
1185
1186         if (old_stdout == -1)
1187                 old_stdout = dup(STDOUT_FILENO);
1188
1189         tdm_log_enable_dlog(0);
1190
1191         snprintf(fd_name, TDM_PATH_LEN, "%s", path);
1192
1193         log_fl = fopen(fd_name, "a");
1194         if (!log_fl) {
1195                 TDM_ERR("failed: open file(%s)\n", fd_name);
1196                 return TDM_ERROR_OPERATION_FAILED;
1197         }
1198
1199         fflush(stderr);
1200         close(STDOUT_FILENO);
1201
1202         setvbuf(log_fl, NULL, _IOLBF, 512);
1203         log_fd = fileno(log_fl);
1204
1205         dup2(log_fd, STDOUT_FILENO);
1206         fclose(log_fl);
1207
1208         return TDM_ERROR_NONE;
1209 }
1210
1211
1212 static void
1213 _tdm_display_ttrace_vblank_cb(tdm_vblank *vblank, tdm_error error, unsigned int sequence,
1214                                                           unsigned int tv_sec, unsigned int tv_usec, void *user_data)
1215 {
1216         tdm_error ret = TDM_ERROR_NONE;
1217
1218         TDM_TRACE_MARK(VBlank);
1219
1220         ret = tdm_vblank_wait(vblank, 0, 0, 1, _tdm_display_ttrace_vblank_cb, NULL);
1221         TDM_RETURN_IF_FAIL(ret == TDM_ERROR_NONE);
1222 }
1223
1224 INTERN tdm_error
1225 tdm_display_enable_ttrace_vblank(tdm_display *dpy, tdm_output *output, int enable)
1226 {
1227         static tdm_vblank *vblank = NULL;
1228         tdm_error ret = TDM_ERROR_NONE;
1229
1230         if (!enable) {
1231                 if (vblank)
1232                         tdm_vblank_destroy(vblank);
1233                 vblank = NULL;
1234                 return TDM_ERROR_NONE;
1235         } else {
1236                 const tdm_output_mode *mode = NULL;
1237
1238                 if (vblank)
1239                         return TDM_ERROR_NONE;
1240
1241                 vblank = tdm_vblank_create(dpy, output, &ret);
1242                 TDM_RETURN_VAL_IF_FAIL(vblank != NULL, ret);
1243
1244                 ret = tdm_output_get_mode(output, &mode);
1245                 TDM_GOTO_IF_FAIL(mode != NULL, enable_fail);
1246
1247                 ret = tdm_vblank_set_fps(vblank, mode->vrefresh);
1248                 TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, enable_fail);
1249
1250                 ret = tdm_vblank_set_enable_fake(vblank, 1);
1251                 TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, enable_fail);
1252
1253                 ret = tdm_vblank_wait(vblank, 0, 0, 1, _tdm_display_ttrace_vblank_cb, NULL);
1254                 TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, enable_fail);
1255         }
1256
1257         return TDM_ERROR_NONE;
1258
1259 enable_fail:
1260         if (vblank)
1261                 tdm_vblank_destroy(vblank);
1262         vblank = NULL;
1263         return ret;
1264 }
1265