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 <boram1288.park@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_private.h"
  41
  42 pthread_mutex_t tdm_mutex_check_lock = PTHREAD_MUTEX_INITIALIZER;
  43 int tdm_mutex_locked;
  44 const char *tdm_mutex_lock_func;
  45 int tdm_mutex_lock_line;
  46 const char *tdm_mutex_unlock_func;
  47 int tdm_mutex_unlock_line;
  48
  49 pthread_mutex_t tdm_debug_mutex_check_lock = PTHREAD_MUTEX_INITIALIZER;
  50 const char *tdm_debug_mutex_lock_func;
  51 int tdm_debug_mutex_lock_line;
  52
  53 /* LCOV_EXCL_START */
  54 static tdm_private_layer *
  55 _tdm_display_find_private_layer(tdm_private_output *private_output,
  56                                                                 tdm_layer *layer_backend)
  57 {
  58         tdm_private_layer *private_layer = NULL;
  59
  60         LIST_FOR_EACH_ENTRY(private_layer, &private_output->layer_list, link) {
  61                 if (private_layer->layer_backend == layer_backend)
  62                         return private_layer;
  63         }
  64
  65         return NULL;
  66 }
  67
  68 INTERN tdm_private_output *
  69 tdm_display_find_private_output(tdm_private_display *private_display, tdm_output *output_backend)
  70 {
  71         tdm_private_module *private_module = NULL;
  72         tdm_private_output *private_output = NULL;
  73
  74         LIST_FOR_EACH_ENTRY(private_module, &private_display->module_list, link) {
  75                 LIST_FOR_EACH_ENTRY(private_output, &private_module->output_list, link) {
  76                         if (private_output->output_backend == output_backend)
  77                                 return private_output;
  78                 }
  79         }
  80
  81         return NULL;
  82 }
  83
  84 INTERN void *
  85 tdm_display_find_output_stamp(tdm_private_display *private_display, double stamp)
  86 {
  87         tdm_private_module *private_module = NULL;
  88         tdm_private_output *private_output = NULL;
  89
  90         LIST_FOR_EACH_ENTRY(private_module, &private_display->module_list, link) {
  91                 LIST_FOR_EACH_ENTRY(private_output, &private_module->output_list, link) {
  92                         if (private_output->stamp == stamp)
  93                                 return private_output;
  94                 }
  95         }
  96
  97         return NULL;
  98 }
  99
 100 static void
 101 _tdm_display_destroy_caps_pp(tdm_caps_pp *caps_pp)
 102 {
 103         if (caps_pp->formats)
 104                 free(caps_pp->formats);
 105
 106         memset(caps_pp, 0, sizeof(tdm_caps_pp));
 107 }
 108
 109 static void
 110 _tdm_display_destroy_caps_capture(tdm_caps_capture *caps_capture)
 111 {
 112         if (caps_capture->formats)
 113                 free(caps_capture->formats);
 114
 115         memset(caps_capture, 0, sizeof(tdm_caps_capture));
 116 }
 117
 118 static void
 119 _tdm_display_destroy_caps_layer(tdm_caps_layer *caps_layer)
 120 {
 121         if (caps_layer->formats)
 122                 free(caps_layer->formats);
 123
 124         if (caps_layer->props)
 125                 free(caps_layer->props);
 126
 127         memset(caps_layer, 0, sizeof(tdm_caps_layer));
 128 }
 129
 130 static void
 131 _tdm_display_destroy_caps_output(tdm_caps_output *caps_output)
 132 {
 133         if (caps_output->modes)
 134                 free(caps_output->modes);
 135
 136         if (caps_output->props)
 137                 free(caps_output->props);
 138
 139         memset(caps_output, 0, sizeof(tdm_caps_output));
 140 }
 141
 142 static void
 143 _tdm_display_destroy_private_layer(tdm_private_layer *private_layer)
 144 {
 145         tdm_private_capture *c = NULL, *cc = NULL;
 146
 147         tdm_layer_unset_buffer_internal(private_layer);
 148
 149         LIST_FOR_EACH_ENTRY_SAFE(c, cc, &private_layer->capture_list, link)
 150         tdm_capture_destroy_internal(c);
 151
 152         _tdm_display_destroy_caps_layer(&private_layer->caps);
 153
 154         /* when destroying layer, someone could check if layer is valid. So delete
 155          * the layer's link at last.
 156          */
 157         LIST_DEL(&private_layer->link);
 158
 159         free(private_layer);
 160 }
 161
 162 static void
 163 _tdm_display_destroy_private_output(tdm_private_output *private_output)
 164 {
 165         tdm_private_display *private_display = private_output->private_display;
 166         tdm_private_layer *l = NULL, *ll = NULL;
 167         tdm_private_hwc_window *hw = NULL, *hww = NULL;
 168         tdm_private_capture *c = NULL, *cc = NULL;
 169         tdm_private_output_vblank_handler *v = NULL, *vv = NULL;
 170         tdm_private_output_commit_handler *om = NULL, *omm = NULL;
 171         tdm_private_layer_commit_handler *lm = NULL, *lmm = NULL;
 172         tdm_private_output_change_handler *h = NULL, *hh = NULL;
 173
 174         free(private_output->layers_ptr);
 175
 176         if (private_output->vblank_timeout_timer)
 177                 tdm_event_loop_source_remove(private_output->vblank_timeout_timer);
 178
 179         LIST_FOR_EACH_ENTRY_SAFE(v, vv, &private_output->vblank_handler_list, link) {
 180                 LIST_DEL(&v->link);
 181                 free(v);
 182         }
 183
 184         LIST_FOR_EACH_ENTRY_SAFE(om, omm, &private_output->output_commit_handler_list, link) {
 185                 LIST_DEL(&om->link);
 186                 free(om);
 187         }
 188
 189         LIST_FOR_EACH_ENTRY_SAFE(lm, lmm, &private_output->layer_commit_handler_list, link) {
 190                 LIST_DEL(&lm->link);
 191                 free(lm);
 192         }
 193
 194         LIST_FOR_EACH_ENTRY_SAFE(lm, lmm, &private_output->pending_commit_handler_list, link) {
 195                 LIST_DEL(&lm->link);
 196                 free(lm);
 197         }
 198
 199         LIST_FOR_EACH_ENTRY_SAFE(h, hh, &private_output->change_handler_list, link) {
 200                 LIST_DEL(&h->link);
 201                 tdm_thread_cb_remove(h->private_output, TDM_THREAD_CB_OUTPUT_DPMS, NULL, tdm_output_thread_cb_change, h);
 202                 tdm_thread_cb_remove(h->private_output, TDM_THREAD_CB_OUTPUT_STATUS, NULL, tdm_output_thread_cb_change, h);
 203                 free(h);
 204         }
 205
 206         if (private_output->vblank) {
 207                 /* tdm_vblank APIs is for server. it should be called in unlock status*/
 208                 _pthread_mutex_unlock(&private_display->lock);
 209                 tdm_vblank_destroy(private_output->vblank);
 210                 _pthread_mutex_lock(&private_display->lock);
 211         }
 212
 213         if (private_output->ttrace_vblank) {
 214                 /* tdm_vblank APIs is for server. it should be called in unlock status*/
 215                 _pthread_mutex_unlock(&private_display->lock);
 216                 tdm_vblank_destroy(private_output->ttrace_vblank);
 217                 _pthread_mutex_lock(&private_display->lock);
 218         }
 219
 220         LIST_FOR_EACH_ENTRY_SAFE(c, cc, &private_output->capture_list, link)
 221         tdm_capture_destroy_internal(c);
 222
 223         LIST_FOR_EACH_ENTRY_SAFE(hw, hww, &private_output->hwc_window_list, link)
 224         tdm_hwc_window_destroy_internal(hw);
 225
 226         LIST_FOR_EACH_ENTRY_SAFE(l, ll, &private_output->layer_list, link)
 227         _tdm_display_destroy_private_layer(l);
 228
 229         _tdm_display_destroy_caps_output(&private_output->caps);
 230
 231         tdm_thread_cb_remove(private_output, TDM_THREAD_CB_NEED_VALIDATE, NULL,
 232                                                  tdm_output_need_validate_handler_thread, NULL);
 233         tdm_event_loop_source_remove(private_output->need_validate.event_source);
 234         close(private_output->need_validate.event_fd);
 235
 236         /* when destroying output, vblank objects are also destroyed. vblank checks
 237          * if output object is valid. So delete the output's link at last.
 238          */
 239         LIST_DEL(&private_output->link);
 240
 241         private_output->stamp = 0;
 242         free(private_output);
 243 }
 244
 245 static void
 246 _tdm_display_destroy_private_display(tdm_private_display *private_display)
 247 {
 248         tdm_private_module *private_module = NULL, *bb = NULL;
 249         tdm_private_output *o = NULL, *oo = NULL;
 250         tdm_private_pp *p = NULL, *pp = NULL;
 251
 252         LIST_FOR_EACH_ENTRY_SAFE(private_module, bb, &private_display->module_list, link) {
 253                 LIST_FOR_EACH_ENTRY_SAFE(p, pp, &private_module->pp_list, link) {
 254                         tdm_pp_destroy_internal(p);
 255                 }
 256
 257                 LIST_FOR_EACH_ENTRY_SAFE(o, oo, &private_module->output_list, link) {
 258                         _tdm_display_destroy_private_output(o);
 259                 }
 260
 261                 _tdm_display_destroy_caps_pp(&private_module->caps_pp);
 262                 _tdm_display_destroy_caps_capture(&private_module->caps_capture);
 263
 264                 private_module->capabilities = 0;
 265                 private_module->caps_display.max_layer_count = 0;
 266
 267                 if (private_module->outputs) {
 268                         free(private_module->outputs);
 269                         private_module->outputs = NULL;
 270                 }
 271         }
 272 }
 273
 274 static tdm_error
 275 _tdm_display_update_caps_pp(tdm_private_module *private_module, tdm_caps_pp *caps)
 276 {
 277         tdm_func_display *func_display;
 278         tdm_error ret;
 279
 280         func_display = &private_module->func_display;
 281
 282         if (!func_display->display_get_pp_capability) {
 283                 TDM_ERR("backend(%s) no display_get_pp_capability()", private_module->module_data->name);
 284                 return TDM_ERROR_BAD_MODULE;
 285         }
 286
 287         ret = func_display->display_get_pp_capability(private_module->bdata, caps);
 288         if (ret != TDM_ERROR_NONE) {
 289                 TDM_ERR("backend(%s) display_get_pp_capability() failed", private_module->module_data->name);
 290                 return TDM_ERROR_BAD_MODULE;
 291         }
 292
 293         return TDM_ERROR_NONE;
 294 }
 295
 296 static tdm_error
 297 _tdm_display_update_caps_capture(tdm_private_module *private_module, tdm_caps_capture *caps)
 298 {
 299         tdm_func_display *func_display;
 300         tdm_error ret;
 301
 302         func_display = &private_module->func_display;
 303
 304         if (!func_display->display_get_capture_capability) {
 305                 TDM_ERR("backend(%s) no display_get_capture_capability()", private_module->module_data->name);
 306                 return TDM_ERROR_BAD_MODULE;
 307         }
 308
 309         ret = func_display->display_get_capture_capability(private_module->bdata, caps);
 310         if (ret != TDM_ERROR_NONE) {
 311                 TDM_ERR("backend(%s) display_get_capture_capability() failed", private_module->module_data->name);
 312                 return TDM_ERROR_BAD_MODULE;
 313         }
 314
 315         return TDM_ERROR_NONE;
 316 }
 317
 318 static tdm_error
 319 _tdm_display_update_caps_layer(tdm_private_module *private_module,
 320                                                            tdm_layer *layer_backend, tdm_caps_layer *caps)
 321 {
 322         tdm_func_layer *func_layer = &private_module->func_layer;
 323         tdm_error ret;
 324
 325         if (!func_layer->layer_get_capability) {
 326                 TDM_ERR("backend(%s) no layer_get_capability()", private_module->module_data->name);
 327                 return TDM_ERROR_BAD_MODULE;
 328         }
 329
 330         ret = func_layer->layer_get_capability(layer_backend, caps);
 331         if (ret != TDM_ERROR_NONE) {
 332                 TDM_ERR("backend(%s) layer_get_capability() failed", private_module->module_data->name);
 333                 return TDM_ERROR_BAD_MODULE;
 334         }
 335
 336         return TDM_ERROR_NONE;
 337 }
 338
 339 static tdm_error
 340 _tdm_display_update_caps_output(tdm_private_module *private_module, int pipe,
 341                                                                 tdm_output *output_backend, tdm_caps_output *caps)
 342 {
 343         tdm_func_output *func_output = &private_module->func_output;
 344         char temp[TDM_NAME_LEN];
 345         tdm_error ret;
 346         double stamp;
 347
 348         if (!func_output->output_get_capability) {
 349                 TDM_ERR("backend(%s) no output_get_capability()", private_module->module_data->name);
 350                 return TDM_ERROR_BAD_MODULE;
 351         }
 352
 353         stamp = tdm_helper_get_time();
 354         ret = func_output->output_get_capability(output_backend, caps);
 355         TDM_DBG("backend(%s) backend output_get_capability() time: %.3f ms",
 356                         private_module->module_data->name, (tdm_helper_get_time() - stamp) * 1000.0);
 357
 358         if (ret != TDM_ERROR_NONE) {
 359                 TDM_ERR("backend(%s) output_get_capability() failed", private_module->module_data->name);
 360                 return TDM_ERROR_BAD_MODULE;
 361         }
 362
 363         /* FIXME: Use model for tdm client to distinguish amoung outputs */
 364         snprintf(temp, TDM_NAME_LEN, "%s-%d", caps->model, pipe);
 365         snprintf(caps->model, TDM_NAME_LEN, "%s", temp);
 366
 367         return TDM_ERROR_NONE;
 368 }
 369
 370 static tdm_error
 371 _tdm_display_update_layer(tdm_private_output *private_output,
 372                                                   tdm_layer *layer_backend, int index)
 373 {
 374         tdm_private_layer *private_layer;
 375         tdm_error ret;
 376
 377         private_layer = _tdm_display_find_private_layer(private_output, layer_backend);
 378         if (!private_layer) {
 379                 private_layer = calloc(1, sizeof(tdm_private_layer));
 380                 TDM_RETURN_VAL_IF_FAIL(private_layer != NULL, TDM_ERROR_OUT_OF_MEMORY);
 381
 382                 LIST_ADDTAIL(&private_layer->link, &private_output->layer_list);
 383                 LIST_INITHEAD(&private_layer->capture_list);
 384
 385                 private_layer->index = index;
 386                 private_layer->private_module = private_output->private_module;
 387                 private_layer->private_display = private_output->private_display;
 388                 private_layer->private_output = private_output;
 389                 private_layer->layer_backend = layer_backend;
 390                 private_layer->usable = 1;
 391         }
 392
 393         _tdm_display_destroy_caps_layer(&private_layer->caps);
 394
 395         ret = _tdm_display_update_caps_layer(private_output->private_module, layer_backend, &private_layer->caps);
 396         TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
 397
 398         return TDM_ERROR_NONE;
 399 }
 400
 401 INTERN tdm_error
 402 tdm_display_update_output(tdm_private_module *private_module,
 403                                                   tdm_output *output_backend, int pipe, unsigned int need_new_caps)
 404 {
 405         tdm_func_output *func_output = &private_module->func_output;
 406         tdm_private_output *private_output = NULL;
 407         tdm_layer **layers = NULL;
 408         int layer_count = 0, i;
 409         tdm_error ret;
 410
 411         private_output = tdm_display_find_private_output(private_module->private_display, output_backend);
 412         if (!private_output) {
 413                 private_output = calloc(1, sizeof(tdm_private_output));
 414                 TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_OUT_OF_MEMORY);
 415
 416                 private_output->stamp = tdm_helper_get_time();
 417                 while (tdm_display_find_output_stamp(private_module->private_display, private_output->stamp))
 418                         private_output->stamp++;
 419
 420                 LIST_ADDTAIL(&private_output->link, &private_module->output_list);
 421
 422                 private_output->private_module = private_module;
 423                 private_output->private_display = private_module->private_display;
 424                 private_output->current_dpms_value = TDM_OUTPUT_DPMS_OFF;
 425                 private_output->output_backend = output_backend;
 426                 private_output->pipe = pipe;
 427                 private_output->index = pipe;
 428
 429                 LIST_INITHEAD(&private_output->layer_list);
 430                 LIST_INITHEAD(&private_output->hwc_window_list);
 431                 LIST_INITHEAD(&private_output->capture_list);
 432                 LIST_INITHEAD(&private_output->vblank_handler_list);
 433                 LIST_INITHEAD(&private_output->output_commit_handler_list);
 434                 LIST_INITHEAD(&private_output->layer_commit_handler_list);
 435                 LIST_INITHEAD(&private_output->pending_commit_handler_list);
 436                 LIST_INITHEAD(&private_output->change_handler_list);
 437
 438                 private_output->need_validate.event_fd = -1;
 439
 440                 if (func_output->output_set_status_handler) {
 441                         func_output->output_set_status_handler(private_output->output_backend,
 442                                                                                                    tdm_output_cb_status,
 443                                                                                                    private_output);
 444                         private_output->regist_change_cb = 1;
 445                 }
 446         }
 447
 448         /* need_new_caps will be true only in case of "disconnected -> connected" and "connected -> disconnected"
 449          * because we have to get new modes.
 450          */
 451         if (need_new_caps) {
 452                 _tdm_display_destroy_caps_output(&private_output->caps);
 453
 454                 ret = _tdm_display_update_caps_output(private_module, pipe, output_backend, &private_output->caps);
 455                 TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
 456         }
 457
 458         layers = func_output->output_get_layers(output_backend, &layer_count, &ret);
 459         if (ret != TDM_ERROR_NONE) {
 460                 free(layers);
 461                 return ret;
 462         }
 463
 464         for (i = 0; i < layer_count; i++) {
 465                 ret = _tdm_display_update_layer(private_output, layers[i], i);
 466                 if (ret != TDM_ERROR_NONE) {
 467                         free(layers);
 468                         return ret;
 469                 }
 470         }
 471
 472         free(layers);
 473
 474         return TDM_ERROR_NONE;
 475 }
 476
 477 static tdm_output **
 478 _tdm_display_set_main_first(tdm_output **outputs, int index)
 479 {
 480         tdm_output *output_tmp = NULL;
 481
 482         if (index == 0)
 483                 return outputs;
 484
 485         output_tmp = outputs[0];
 486         outputs[0] = outputs[index];
 487         outputs[index] = output_tmp;
 488
 489         return outputs;
 490 }
 491
 492 static tdm_output **
 493 _tdm_display_get_ordered_outputs(tdm_private_module *private_module, int *count)
 494 {
 495         tdm_func_display *func_display = &private_module->func_display;
 496         tdm_output **outputs = NULL;
 497         tdm_output **new_outputs = NULL;
 498         tdm_output *output_dsi = NULL;
 499         tdm_output *output_lvds = NULL;
 500         tdm_output *output_hdmia = NULL;
 501         tdm_output *output_hdmib = NULL;
 502         int i, output_count = 0, output_connected_count = 0;
 503         int index_dsi = 0, index_lvds = 0, index_hdmia = 0, index_hdmib = 0;
 504         tdm_error ret;
 505
 506         /* don't change list order if not init time */
 507         if (private_module->outputs) {
 508                 TDM_ERR("can't change output order");
 509                 return private_module->outputs;
 510         }
 511
 512         outputs = func_display->display_get_outputs(private_module->bdata, &output_count, &ret);
 513         if (ret != TDM_ERROR_NONE)
 514                 goto failed_get_outputs;
 515
 516         *count = output_count;
 517
 518         if (output_count == 0)
 519                 goto failed_get_outputs;
 520         else if (output_count == 1) {
 521                 private_module->outputs = outputs;
 522                 return outputs;
 523         }
 524
 525         /* count connected outputs */
 526         for (i = 0; i < output_count; i++) {
 527                 tdm_func_output *func_output = &private_module->func_output;
 528                 tdm_caps_output caps;
 529                 memset(&caps, 0, sizeof(tdm_caps_output));
 530
 531                 if (!func_output->output_get_capability) {
 532                         TDM_ERR("no output_get_capability()");
 533                         goto failed_get_outputs;
 534                 }
 535
 536                 ret = func_output->output_get_capability(outputs[i], &caps);
 537                 if (ret != TDM_ERROR_NONE) {
 538                         TDM_ERR("output_get_capability() failed");
 539                         goto failed_get_outputs;
 540                 }
 541
 542                 if (caps.status == TDM_OUTPUT_CONN_STATUS_CONNECTED) {
 543                         output_connected_count++;
 544
 545                         switch (caps.type) {
 546                         case TDM_OUTPUT_TYPE_DSI:
 547                                 output_dsi = outputs[i];
 548                                 index_dsi = i;
 549                                 break;
 550                         case TDM_OUTPUT_TYPE_LVDS:
 551                                 output_lvds = outputs[i];
 552                                 index_lvds = i;
 553                                 break;
 554                         case TDM_OUTPUT_TYPE_HDMIA:
 555                                 output_hdmia = outputs[i];
 556                                 index_hdmia = i;
 557                                 break;
 558                         case TDM_OUTPUT_TYPE_HDMIB:
 559                                 output_hdmib = outputs[i];
 560                                 index_hdmib = i;
 561                                 break;
 562                         default:
 563                                 break;
 564                         }
 565                 }
 566
 567                 _tdm_display_destroy_caps_output(&caps);
 568         }
 569
 570         /* ordering : main output is first */
 571         /* If there is no connected output, lvds or dsi cannot be main display. (cannot connect after booting)
 572           * But hdmi is possible, so set hdmi to main display.
 573           * If connected only one output, it is main output.
 574           * If connected outputs over 2, has priority like below.
 575           * (dsi > lvds > hdmi > else)
 576           */
 577         if (output_connected_count == 0) {
 578                 /* hdmi > dsi > lvds > else */
 579                 if (output_hdmia != NULL)
 580                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmia);
 581                 else if (output_hdmib != NULL)
 582                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmib);
 583                 else if (output_dsi != NULL)
 584                         new_outputs = _tdm_display_set_main_first(outputs, index_dsi);
 585                 else if (output_lvds != NULL)
 586                         new_outputs = _tdm_display_set_main_first(outputs, index_lvds);
 587                 else
 588                         new_outputs = outputs;
 589         } else { /* (output_connected_count > 1) */
 590                 /* dsi > lvds > hdmi > else */
 591                 if (output_dsi != NULL)
 592                         new_outputs = _tdm_display_set_main_first(outputs, index_dsi);
 593                 else if (output_lvds != NULL)
 594                         new_outputs = _tdm_display_set_main_first(outputs, index_lvds);
 595                 else if (output_hdmia != NULL)
 596                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmia);
 597                 else if (output_hdmib != NULL)
 598                         new_outputs = _tdm_display_set_main_first(outputs, index_hdmib);
 599                 else
 600                         new_outputs = outputs;
 601         }
 602
 603         private_module->outputs = new_outputs;
 604
 605         return new_outputs;
 606
 607 failed_get_outputs:
 608         free(outputs);
 609         *count = 0;
 610         return NULL;
 611 }
 612
 613 static tdm_error
 614 _tdm_display_setup(tdm_private_display *private_display)
 615 {
 616         tdm_private_module *private_module = NULL;
 617         tdm_error ret = TDM_ERROR_NONE;
 618         int index = 0;
 619
 620         if (private_display->pp_module) {
 621                 ret = _tdm_display_update_caps_pp(private_display->pp_module,
 622                                                                                   &private_display->pp_module->caps_pp);
 623                 if (ret != TDM_ERROR_NONE)
 624                         goto failed_update;
 625         }
 626
 627         if (private_display->capture_module) {
 628                 ret = _tdm_display_update_caps_capture(private_display->capture_module,
 629                                                                                            &private_display->capture_module->caps_capture);
 630                 if (ret != TDM_ERROR_NONE)
 631                         goto failed_update;
 632         }
 633
 634         LIST_FOR_EACH_ENTRY(private_module, &private_display->module_list, link) {
 635                 tdm_output **outputs;
 636                 int output_count = 0, i;
 637
 638                 outputs = _tdm_display_get_ordered_outputs(private_module, &output_count);
 639                 if (!outputs)
 640                         goto failed_update;
 641
 642                 for (i = 0; i < output_count; i++) {
 643                         ret = tdm_display_update_output(private_module, outputs[i], index++, 1);
 644                         if (ret != TDM_ERROR_NONE)
 645                                 goto failed_update;
 646                 }
 647         }
 648
 649         return TDM_ERROR_NONE;
 650
 651 failed_update:
 652         _tdm_display_destroy_private_display(private_display);
 653         return ret;
 654 }
 655 /* LCOV_EXCL_STOP */
 656
 657 EXTERN tdm_error
 658 tdm_display_update(tdm_display *dpy)
 659 {
 660         TDM_RETURN_VAL_IF_FAIL(dpy != NULL, TDM_ERROR_INVALID_PARAMETER);
 661
 662         TDM_DEPRECATED(NULL);
 663
 664         return TDM_ERROR_NONE;
 665 }
 666
 667 int tdm_debug_module;
 668 int tdm_debug_dump;
 669 int tdm_ttrace_module;
 670 int tdm_ttrace_output;
 671
 672 static tdm_private_display *g_private_display;
 673 static pthread_mutex_t gLock = PTHREAD_MUTEX_INITIALIZER;
 674
 675 /* LCOV_EXCL_START */
 676 static tdm_error
 677 _tdm_display_check_module(tdm_backend_module *module)
 678 {
 679         int major, minor;
 680
 681         TDM_INFO("TDM ABI version : %d.%d",
 682                          TDM_MAJOR_VERSION, TDM_MINOR_VERSION);
 683
 684         if (!module->name) {
 685                 TDM_ERR("TDM backend doesn't have name");
 686                 return TDM_ERROR_BAD_MODULE;
 687         }
 688
 689         if (!module->vendor) {
 690                 TDM_ERR("TDM backend doesn't have vendor");
 691                 return TDM_ERROR_BAD_MODULE;
 692         }
 693
 694         major = TDM_BACKEND_GET_ABI_MAJOR(module->abi_version);
 695         minor = TDM_BACKEND_GET_ABI_MINOR(module->abi_version);
 696
 697         TDM_INFO("TDM module name: %s", module->name);
 698         TDM_INFO("'%s' vendor: %s", module->name, module->vendor);
 699         TDM_INFO("'%s' version: %d.%d", module->name, major, minor);
 700
 701         if (major != TDM_MAJOR_VERSION) {
 702                 TDM_ERR("'%s' major version mismatch, %d != %d",
 703                                 module->name, major, TDM_MAJOR_VERSION);
 704                 return TDM_ERROR_BAD_MODULE;
 705         }
 706
 707         if (minor > TDM_MINOR_VERSION) {
 708                 TDM_ERR("'%s' minor version(%d) is newer than %d",
 709                                 module->name, minor, TDM_MINOR_VERSION);
 710                 return TDM_ERROR_BAD_MODULE;
 711         }
 712
 713         if (!module->init) {
 714                 TDM_ERR("'%s' doesn't have init function", module->name);
 715                 return TDM_ERROR_BAD_MODULE;
 716         }
 717
 718         if (!module->deinit) {
 719                 TDM_ERR("'%s' doesn't have deinit function", module->name);
 720                 return TDM_ERROR_BAD_MODULE;
 721         }
 722
 723         return TDM_ERROR_NONE;
 724 }
 725
 726 static tdm_error
 727 _tdm_display_check_backend_functions(tdm_private_module *private_module)
 728 {
 729         tdm_func_display *func_display = &private_module->func_display;
 730         tdm_func_output *func_output = &private_module->func_output;
 731         tdm_func_layer *func_layer = &private_module->func_layer;
 732         tdm_error ret;
 733
 734         /* below functions should be implemented in backend side */
 735
 736         TDM_RETURN_VAL_IF_FAIL(func_display != NULL, TDM_ERROR_BAD_MODULE);
 737         TDM_RETURN_VAL_IF_FAIL(func_display->display_get_capability, TDM_ERROR_BAD_MODULE);
 738         TDM_RETURN_VAL_IF_FAIL(func_display->display_get_outputs, TDM_ERROR_BAD_MODULE);
 739         TDM_RETURN_VAL_IF_FAIL(func_output->output_get_capability, TDM_ERROR_BAD_MODULE);
 740         TDM_RETURN_VAL_IF_FAIL(func_output->output_get_layers, TDM_ERROR_BAD_MODULE);
 741         TDM_RETURN_VAL_IF_FAIL(func_output->output_wait_vblank, TDM_ERROR_BAD_MODULE);
 742         TDM_RETURN_VAL_IF_FAIL(func_output->output_set_vblank_handler, TDM_ERROR_BAD_MODULE);
 743         TDM_RETURN_VAL_IF_FAIL(func_output->output_commit, TDM_ERROR_BAD_MODULE);
 744         TDM_RETURN_VAL_IF_FAIL(func_output->output_set_commit_handler, TDM_ERROR_BAD_MODULE);
 745         TDM_RETURN_VAL_IF_FAIL(func_output->output_set_mode, TDM_ERROR_BAD_MODULE);
 746         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_get_capability, TDM_ERROR_BAD_MODULE);
 747         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_set_info, TDM_ERROR_BAD_MODULE);
 748         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_get_info, TDM_ERROR_BAD_MODULE);
 749         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_set_buffer, TDM_ERROR_BAD_MODULE);
 750         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_unset_buffer, TDM_ERROR_BAD_MODULE);
 751
 752         ret = func_display->display_get_capability(private_module->bdata, &private_module->caps_display);
 753         if (ret != TDM_ERROR_NONE) {
 754                 TDM_ERR("display_get_capability() failed");
 755                 return TDM_ERROR_BAD_MODULE;
 756         }
 757
 758         if (private_module->capabilities & TDM_DISPLAY_CAPABILITY_PP) {
 759                 tdm_func_pp *func_pp = &private_module->func_pp;
 760                 TDM_RETURN_VAL_IF_FAIL(func_display->display_get_pp_capability, TDM_ERROR_BAD_MODULE);
 761                 TDM_RETURN_VAL_IF_FAIL(func_display->display_create_pp, TDM_ERROR_BAD_MODULE);
 762                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_destroy, TDM_ERROR_BAD_MODULE);
 763                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_commit, TDM_ERROR_BAD_MODULE);
 764                 TDM_RETURN_VAL_IF_FAIL(func_pp->pp_set_done_handler, TDM_ERROR_BAD_MODULE);
 765         }
 766
 767         if (private_module->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE) {
 768                 tdm_func_capture *func_capture = &private_module->func_capture;
 769                 TDM_RETURN_VAL_IF_FAIL(func_display->display_get_capture_capability, TDM_ERROR_BAD_MODULE);
 770                 if (private_module->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_OUTPUT)
 771                         TDM_RETURN_VAL_IF_FAIL(func_output->output_create_capture, TDM_ERROR_BAD_MODULE);
 772                 if (private_module->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_LAYER)
 773                         TDM_RETURN_VAL_IF_FAIL(func_layer->layer_create_capture, TDM_ERROR_BAD_MODULE);
 774                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_destroy, TDM_ERROR_BAD_MODULE);
 775                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_commit, TDM_ERROR_BAD_MODULE);
 776                 TDM_RETURN_VAL_IF_FAIL(func_capture->capture_set_done_handler, TDM_ERROR_BAD_MODULE);
 777         }
 778
 779         return TDM_ERROR_NONE;
 780 }
 781
 782 static tdm_error
 783 _tdm_display_load_module_with_file(tdm_private_display *private_display,
 784                                                                    const char *file)
 785 {
 786         char path[TDM_PATH_LEN] = {0,};
 787         void *module = NULL;
 788         tdm_backend_module *module_data;
 789         tdm_backend_data *bdata = NULL;
 790         tdm_private_module *private_module = NULL;
 791         tdm_error ret;
 792         double stamp;
 793         int size;
 794
 795         size = snprintf(path, sizeof(path), TDM_MODULE_PATH "/%s", file);
 796         if (size >= (int)sizeof(path)) {
 797                 TDM_WRN("too long: %s/%s", TDM_MODULE_PATH, file);
 798                 return TDM_ERROR_BAD_MODULE;
 799         };
 800
 801         private_module = calloc(1, sizeof *private_module);
 802         if (!private_module) {
 803                 TDM_ERR("alloc failed: %m");
 804                 ret = TDM_ERROR_OUT_OF_MEMORY;
 805                 goto failed_load;
 806         }
 807
 808         private_module->private_display = private_display;
 809
 810         stamp = tdm_helper_get_time();
 811
 812         TDM_TRACE_BEGIN("TDM_Load_Backend");
 813         module = dlopen(path, RTLD_LAZY);
 814         if (!module) {
 815                 TDM_ERR("%s", dlerror());
 816                 TDM_TRACE_END();
 817                 ret = TDM_ERROR_BAD_MODULE;
 818                 goto failed_load;
 819         }
 820
 821         private_module->module = module;
 822
 823         module_data = dlsym(module, "tdm_backend_module_data");
 824         if (!module_data) {
 825                 TDM_ERR("'%s' doesn't have data object", file);
 826                 ret = TDM_ERROR_BAD_MODULE;
 827                 TDM_TRACE_END();
 828                 goto failed_load;
 829         }
 830         TDM_TRACE_END();
 831
 832         private_module->module_data = module_data;
 833
 834         TDM_DBG("dlopen, dlsym time: %.3f ms", (tdm_helper_get_time() - stamp) * 1000.0);
 835
 836         /* check if version, init() and deinit() are valid or not */
 837         ret = _tdm_display_check_module(module_data);
 838         if (ret != TDM_ERROR_NONE) {
 839                 TDM_ERR("backend(%s) load failed: check module error", module_data->name);
 840                 goto failed_load;
 841         }
 842
 843         private_display->current_module = private_module;
 844
 845         /* We don't care if backend_data is NULL or not. It's up to backend. */
 846         TDM_TRACE_BEGIN("TDM_Init_Backend");
 847         stamp = tdm_helper_get_time();
 848         bdata = module_data->init((tdm_display *)private_display, &ret);
 849         TDM_DBG("backend init() time: %.3f ms", (tdm_helper_get_time() - stamp) * 1000.0);
 850         TDM_TRACE_END();
 851
 852         private_display->current_module = NULL;
 853
 854         private_module->bdata = bdata;
 855
 856         if (ret != TDM_ERROR_NONE) {
 857                 TDM_ERR("backend(%s) load failed: init error", module_data->name);
 858                 goto failed_load;
 859         }
 860
 861         ret = _tdm_display_check_backend_functions(private_module);
 862         if (ret != TDM_ERROR_NONE) {
 863                 TDM_ERR("backend(%s) load failed: check functions error", module_data->name);
 864                 goto failed_load;
 865         }
 866
 867         LIST_INITHEAD(&private_module->output_list);
 868         LIST_INITHEAD(&private_module->pp_list);
 869         LIST_INITHEAD(&private_module->capture_list);
 870
 871         LIST_ADDTAIL(&private_module->link, &private_display->module_list);
 872
 873         TDM_INFO("Success to load '%s' module", module_data->name);
 874
 875         return TDM_ERROR_NONE;
 876 failed_load:
 877         if (bdata)
 878                 module_data->deinit(bdata);
 879         if (module)
 880                 dlclose(module);
 881         if (private_module)
 882                 free(private_module);
 883         return ret;
 884 }
 885
 886 static tdm_error
 887 _tdm_display_load_modules(tdm_private_display *private_display)
 888 {
 889         const char *module_names;
 890         tdm_error ret = 0;
 891         char temp[TDM_PATH_LEN];
 892         char *arg;
 893         char *end;
 894
 895         LIST_INITHEAD(&private_display->module_list);
 896
 897         module_names = tdm_config_get_string(TDM_CONFIG_KEY_GENERAL_BACKENDS, TDM_DEFAULT_MODULE);
 898
 899         snprintf(temp, TDM_PATH_LEN, "%s", module_names);
 900
 901         arg = strtok_r(temp, TDM_CONFIG_DELIM, &end);
 902         while (arg) {
 903                 TDM_INFO("loading a %s backend", arg);
 904                 ret = _tdm_display_load_module_with_file(private_display, arg);
 905                 if (ret == TDM_ERROR_NONE)
 906                         TDM_INFO("%s backend loading success", arg);
 907                 else
 908                         TDM_INFO("%s backend loading failed", arg);
 909                 arg = strtok_r(NULL, TDM_CONFIG_DELIM, &end);
 910         }
 911
 912         /* load bufmgr priv from dummy lib */
 913         if (LIST_IS_EMPTY(&private_display->module_list)) {
 914                 TDM_WRN("No backend. loading a %s backend", TDM_DUMMY_MODULE);
 915                 ret = _tdm_display_load_module_with_file(private_display, TDM_DUMMY_MODULE);
 916                 if (ret == TDM_ERROR_NONE)
 917                         TDM_INFO("%s backend loading success", TDM_DUMMY_MODULE);
 918                 else
 919                         TDM_INFO("%s backend loading failed", TDM_DUMMY_MODULE);
 920         }
 921
 922         return ret;
 923 }
 924
 925 static void
 926 _tdm_display_unload_modules(tdm_private_display *private_display)
 927 {
 928         tdm_private_module *private_module = NULL, *bb = NULL;
 929
 930         LIST_FOR_EACH_ENTRY_SAFE(private_module, bb, &private_display->module_list, link) {
 931                 LIST_DEL(&private_module->link);
 932
 933                 if (private_module->module_data)
 934                         private_module->module_data->deinit(private_module->bdata);
 935                 if (private_module->module)
 936                         dlclose(private_module->module);
 937
 938                 free(private_module);
 939         }
 940 }
 941 /* LCOV_EXCL_STOP */
 942
 943 EXTERN tdm_display *
 944 tdm_display_init(tdm_error *error)
 945 {
 946         tdm_private_display *private_display = NULL;
 947         const char *str;
 948         tdm_error ret;
 949         double stamp1, stamp2, start;
 950         int mode;
 951
 952         pthread_mutex_lock(&gLock);
 953
 954         if (g_private_display) {
 955                 g_private_display->init_count++;
 956                 pthread_mutex_unlock(&gLock);
 957                 if (error)
 958                         *error = TDM_ERROR_NONE;
 959                 return g_private_display;
 960         }
 961
 962         start = stamp1 = tdm_helper_get_time();
 963
 964         stamp2 = tdm_helper_get_time();
 965         TDM_INFO("config init time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 966         stamp1 = stamp2;
 967
 968         private_display = calloc(1, sizeof(tdm_private_display));
 969         if (!private_display) {
 970                 /* LCOV_EXCL_START */
 971                 ret = TDM_ERROR_OUT_OF_MEMORY;
 972                 TDM_ERR("'private_display != NULL' failed");
 973                 goto failed_alloc;
 974                 /* LCOV_EXCL_STOP */
 975         }
 976
 977         private_display->stamp = tdm_helper_get_time();
 978
 979         str = tdm_config_get_string(TDM_CONFIG_KEY_DEBUG_MODULE, NULL);
 980         if (str)
 981                 tdm_display_enable_debug_module(str);
 982
 983         str = tdm_config_get_string(TDM_CONFIG_KEY_DEBUG_DUMP, NULL);
 984         if (str)
 985                 tdm_display_enable_dump(private_display, str, NULL, NULL);
 986
 987         if (pthread_mutex_init(&private_display->lock, NULL)) {
 988                 /* LCOV_EXCL_START */
 989                 ret = TDM_ERROR_OPERATION_FAILED;
 990                 TDM_ERR("mutex init failed: %m");
 991                 goto failed_mutex_init;
 992                 /* LCOV_EXCL_STOP */
 993         }
 994
 995         _pthread_mutex_lock(&private_display->lock);
 996
 997         stamp2 = tdm_helper_get_time();
 998         TDM_DBG("prepare init time: %.3f ms", (stamp2 - stamp1) * 1000.0);
 999         stamp1 = stamp2;
1000
1001         ret = tdm_event_loop_init(private_display);
1002         if (ret != TDM_ERROR_NONE)
1003                 goto failed_event;
1004
1005         stamp2 = tdm_helper_get_time();
1006         TDM_INFO("event loop init time: %.3f ms", (stamp2 - stamp1) * 1000.0);
1007         stamp1 = stamp2;
1008
1009         ret = tdm_vblank_init(private_display);
1010         if (ret != TDM_ERROR_NONE)
1011                 goto failed_vblank;
1012
1013         ret = tdm_output_init(private_display);
1014         if (ret != TDM_ERROR_NONE)
1015                 goto failed_load;
1016
1017         ret = tdm_pp_init(private_display);
1018         if (ret != TDM_ERROR_NONE)
1019                 goto failed_load;
1020
1021         ret = tdm_capture_init(private_display);
1022         if (ret != TDM_ERROR_NONE)
1023                 goto failed_load;
1024
1025         ret = _tdm_display_load_modules(private_display);
1026         if (ret != TDM_ERROR_NONE)
1027                 goto failed_load;
1028
1029         stamp2 = tdm_helper_get_time();
1030         TDM_INFO("loading backend time: %.3f ms", (stamp2 - stamp1) * 1000.0);
1031         stamp1 = stamp2;
1032
1033 #ifdef INIT_BUFMGR
1034         int tdm_drm_fd = tdm_helper_get_fd("TDM_DRM_MASTER_FD");
1035         if (tdm_drm_fd >= 0) {
1036                 private_display->bufmgr = tbm_bufmgr_init(tdm_drm_fd);
1037                 close(tdm_drm_fd);
1038                 if (!private_display->bufmgr) {
1039                         TDM_ERR("tbm_bufmgr_init failed");
1040                         goto failed_update;
1041                 } else {
1042                         TDM_INFO("tbm_bufmgr_init successed");
1043                 }
1044
1045                 stamp2 = tdm_helper_get_time();
1046                 TDM_DBG("initializing bufmgr time: %.3f ms", (stamp2 - stamp1) * 1000.0);
1047                 stamp1 = stamp2;
1048         }
1049 #endif
1050
1051         TDM_TRACE_BEGIN("TDM_Update_Display");
1052         ret = _tdm_display_setup(private_display);
1053         TDM_TRACE_END();
1054         if (ret != TDM_ERROR_NONE)
1055                 goto failed_update;
1056
1057         stamp2 = tdm_helper_get_time();
1058         TDM_DBG("updating display time: %.3f ms", (stamp2 - stamp1) * 1000.0);
1059         stamp1 = stamp2;
1060
1061         tdm_event_loop_create_backend_source(private_display);
1062
1063         private_display->init_count = 1;
1064         g_private_display = private_display;
1065
1066         tdm_private_module *b = NULL;
1067         tdm_private_output *o = NULL;
1068         LIST_FOR_EACH_ENTRY(b, &private_display->module_list, link) {
1069                 LIST_FOR_EACH_ENTRY(o, &b->output_list, link) {
1070                         if (o->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)
1071                                 tdm_output_need_validate_event_init(o);
1072                 }
1073         }
1074
1075         /* the COMMIT_PER_VBLANK functionality is ability of an output to support
1076          * several operational modes (commit_per_vblank modes) related to tdm_commit;
1077          * this functionality can be turned off which means a default mode */
1078         mode = tdm_config_get_int(TDM_CONFIG_KEY_GENERAL_COMMIT_PER_VBLANK, 0);
1079         if (mode > 0) {
1080                 tdm_private_module *b = NULL;
1081                 tdm_private_output *o = NULL;
1082
1083                 /* outputs which support hwc capability can work only
1084                  * if commit_per_vblank mode is '0' (default mode) */
1085                 LIST_FOR_EACH_ENTRY(b, &private_display->module_list, link) {
1086                         LIST_FOR_EACH_ENTRY(o, &b->output_list, link) {
1087                                 if (!(o->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC))
1088                                         tdm_output_choose_commit_per_vblank_mode(o, mode);
1089                         }
1090                 }
1091         }
1092
1093         if (error)
1094                 *error = TDM_ERROR_NONE;
1095
1096         _pthread_mutex_unlock(&private_display->lock);
1097         pthread_mutex_unlock(&gLock);
1098
1099         TDM_INFO("init time: %.3f ms", (tdm_helper_get_time() - start) * 1000.0);
1100
1101         return (tdm_display *)private_display;
1102
1103 /* LCOV_EXCL_START */
1104 failed_update:
1105         _tdm_display_unload_modules(private_display);
1106 failed_load:
1107         tdm_vblank_deinit(private_display);
1108 failed_vblank:
1109         tdm_event_loop_stop(private_display);
1110         tdm_event_loop_deinit(private_display);
1111 failed_event:
1112         _pthread_mutex_unlock(&private_display->lock);
1113         pthread_mutex_destroy(&private_display->lock);
1114 failed_mutex_init:
1115         free(private_display);
1116 failed_alloc:
1117         if (error)
1118                 *error = ret;
1119         pthread_mutex_unlock(&gLock);
1120         return NULL;
1121 /* LCOV_EXCL_STOP */
1122 }
1123
1124 EXTERN void
1125 tdm_display_deinit(tdm_display *dpy)
1126 {
1127         tdm_private_display *private_display = dpy;
1128
1129         if (!private_display)
1130                 return;
1131
1132         pthread_mutex_lock(&gLock);
1133
1134         private_display->init_count--;
1135         if (private_display->init_count > 0) {
1136                 pthread_mutex_unlock(&gLock);
1137                 return;
1138         }
1139
1140         /* dont move the position of lock/unlock. all resource should be protected
1141          * during destroying. after tdm_event_loop_deinit, we don't worry about thread
1142          * things because it's finalized.
1143          */
1144         _pthread_mutex_lock(&private_display->lock);
1145         tdm_event_loop_stop(private_display);
1146         _pthread_mutex_unlock(&private_display->lock);
1147
1148         tdm_event_loop_deinit(private_display);
1149
1150         /* when private_output is destroyed, all vblank resources of client and server
1151          * are destroyed. Then we can call tdm_vblank_deinit. After destroying display,
1152          * we can unload backend modulues.
1153          */
1154         _tdm_display_destroy_private_display(private_display);
1155         _tdm_display_unload_modules(private_display);
1156
1157         tdm_vblank_deinit(private_display);
1158
1159 #ifdef INIT_BUFMGR
1160         if (private_display->bufmgr)
1161                 tbm_bufmgr_deinit(private_display->bufmgr);
1162 #endif
1163
1164         tbm_drm_helper_unset_tbm_master_fd();
1165
1166         pthread_mutex_destroy(&private_display->lock);
1167         free(private_display);
1168         g_private_display = NULL;
1169
1170         if (tdm_debug_dump_dir) {
1171                 free(tdm_debug_dump_dir);
1172                 tdm_debug_dump_dir = NULL;
1173         }
1174
1175         tdm_config_deinit();
1176
1177         pthread_mutex_unlock(&gLock);
1178
1179         TDM_INFO("done");
1180 }
1181
1182 INTERN tdm_private_display *
1183 tdm_display_get(void)
1184 {
1185         return g_private_display;
1186 }
1187