src/tdm_capture.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 #define CAPTURE_FUNC_ENTRY() \
  46         tdm_func_capture *func_capture; \
  47         tdm_private_display *private_display; \
  48         tdm_private_capture *private_capture; \
  49         tdm_error ret = TDM_ERROR_NONE; \
  50         TDM_RETURN_VAL_IF_FAIL(capture != NULL, TDM_ERROR_INVALID_PARAMETER); \
  51         private_capture = (tdm_private_capture*)capture; \
  52         private_display = private_capture->private_display; \
  53         func_capture = &private_display->func_capture
  54
  55 static void
  56 _tdm_capture_print_list(struct list_head *list)
  57 {
  58         tdm_capture_private_buffer *b = NULL;
  59         char str[512], *p;
  60         int len = sizeof(str);
  61
  62         TDM_RETURN_IF_FAIL(list != NULL);
  63
  64         p = str;
  65         LIST_FOR_EACH_ENTRY(b, list, link) {
  66                 if (len > 0) {
  67                         int l = snprintf(p, len, " (%p)", b->buffer);
  68                         p += l;
  69                         len -= l;
  70                 } else
  71                         break;
  72         }
  73
  74         TDM_INFO("\t %s", str);
  75 }
  76
  77 static tdm_capture_private_buffer *
  78 _tdm_capture_find_tbm_buffer(struct list_head *list, tbm_surface_h buffer)
  79 {
  80         tdm_capture_private_buffer *b = NULL, *bb = NULL;
  81
  82         LIST_FOR_EACH_ENTRY_SAFE(b, bb, list, link) {
  83                 if (b->buffer == buffer)
  84                         return b;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 static tdm_capture_private_buffer *
  91 _tdm_capture_find_buffer(struct list_head *list, tdm_capture_private_buffer *capture_buffer)
  92 {
  93         tdm_capture_private_buffer *b = NULL, *bb = NULL;
  94
  95         LIST_FOR_EACH_ENTRY_SAFE(b, bb, list, link) {
  96                 if (b == capture_buffer)
  97                         return b;
  98         }
  99
 100         return NULL;
 101 }
 102
 103 INTERN void
 104 tdm_capture_cb_done(tdm_capture *capture_backend, tbm_surface_h buffer,
 105                                         void *user_data)
 106 {
 107         tdm_private_capture *private_capture = user_data;
 108         tdm_private_display *private_display = private_capture->private_display;
 109         tdm_capture_private_buffer *capture_buffer = NULL, *first_entry = NULL;
 110
 111         TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 112
 113         if (private_capture->owner_tid != syscall(SYS_gettid)) {
 114                 tdm_thread_cb_capture_done capture_done;
 115                 tdm_error ret;
 116
 117                 capture_done.base.type = TDM_THREAD_CB_CAPTURE_DONE;
 118                 capture_done.base.length = sizeof capture_done;
 119                 capture_done.capture_stamp = private_capture->stamp;
 120                 capture_done.buffer = buffer;
 121                 capture_done.user_data = user_data;
 122
 123                 ret = tdm_thread_send_cb(private_display->private_loop, &capture_done.base);
 124                 TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 125
 126                 return;
 127         }
 128
 129         if (private_capture->owner_tid != syscall(SYS_gettid))
 130                 TDM_NEVER_GET_HERE();
 131
 132         if (tdm_debug_dump & TDM_DUMP_FLAG_CAPTURE) {
 133                 char str[TDM_PATH_LEN];
 134                 static int i;
 135                 snprintf(str, TDM_PATH_LEN, "capture_%03d", i++);
 136                 tdm_helper_dump_buffer_str(buffer, tdm_debug_dump_dir, str);
 137         }
 138
 139         if (tdm_debug_module & TDM_DEBUG_BUFFER)
 140                 TDM_INFO("capture(%p) done: %p", private_capture, buffer);
 141
 142         if (!LIST_IS_EMPTY(&private_capture->buffer_list)) {
 143                 first_entry = container_of((&private_capture->buffer_list)->next, capture_buffer, link);
 144                 if (first_entry->buffer != buffer)
 145                         TDM_ERR("buffer(%p) is skipped", first_entry->buffer);
 146         } else {
 147                 TDM_NEVER_GET_HERE();
 148         }
 149
 150         if ((capture_buffer = _tdm_capture_find_tbm_buffer(&private_capture->buffer_list, buffer))) {
 151                 LIST_DEL(&capture_buffer->link);
 152
 153                 _pthread_mutex_unlock(&private_display->lock);
 154                 if (private_capture->done_func)
 155                         private_capture->done_func(capture_buffer, buffer, private_capture->done_user_data);
 156                 tdm_buffer_unref_backend(buffer);
 157                 _pthread_mutex_lock(&private_display->lock);
 158
 159                 free(capture_buffer);
 160         }
 161 }
 162
 163 INTERN tdm_private_capture *
 164 tdm_capture_find_stamp(tdm_private_display *private_display, double stamp)
 165 {
 166         tdm_private_capture *private_capture = NULL;
 167
 168         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), NULL);
 169
 170         LIST_FOR_EACH_ENTRY(private_capture, &private_display->capture_list, display_link) {
 171                 if (private_capture->stamp == stamp)
 172                         return private_capture;
 173         }
 174
 175         return NULL;
 176 }
 177
 178 INTERN tdm_private_capture *
 179 tdm_capture_create_output_internal(tdm_private_output *private_output,
 180                                                                    tdm_error *error)
 181 {
 182         tdm_private_display *private_display = private_output->private_display;
 183         tdm_func_output *func_output = &private_display->func_output;
 184         tdm_func_capture *func_capture = &private_display->func_capture;
 185         tdm_private_capture *private_capture = NULL;
 186         tdm_capture *capture_backend = NULL;
 187         tdm_error ret = TDM_ERROR_NONE;
 188
 189         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), NULL);
 190
 191         if (!(private_display->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE)) {
 192                 TDM_ERR("no capture capability");
 193                 if (error)
 194                         *error = TDM_ERROR_NO_CAPABILITY;
 195                 return NULL;
 196         }
 197
 198         if (!(private_display->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_OUTPUT)) {
 199                 TDM_ERR("no output capture capability");
 200                 if (error)
 201                         *error = TDM_ERROR_NO_CAPABILITY;
 202                 return NULL;
 203         }
 204
 205         capture_backend = func_output->output_create_capture(
 206                                                   private_output->output_backend, &ret);
 207         if (ret != TDM_ERROR_NONE) {
 208                 if (error)
 209                         *error = ret;
 210                 return NULL;
 211         }
 212
 213         private_capture = calloc(1, sizeof(tdm_private_capture));
 214         if (!private_capture) {
 215                 TDM_ERR("failed: alloc memory");
 216                 func_capture->capture_destroy(capture_backend);
 217                 if (error)
 218                         *error = TDM_ERROR_OUT_OF_MEMORY;
 219                 return NULL;
 220         }
 221
 222         ret = func_capture->capture_set_done_handler(capture_backend,
 223                         tdm_capture_cb_done, private_capture);
 224         if (ret != TDM_ERROR_NONE) {
 225                 TDM_ERR("capture(%p) set capture_done_handler failed", private_capture);
 226                 func_capture->capture_destroy(capture_backend);
 227                 if (error)
 228                         *error = ret;
 229                 return NULL;
 230         }
 231
 232         private_capture->stamp = tdm_helper_get_time();
 233         while (tdm_capture_find_stamp(private_display, private_capture->stamp))
 234                 private_capture->stamp++;
 235
 236         LIST_ADD(&private_capture->link, &private_output->capture_list);
 237         LIST_ADD(&private_capture->display_link, &private_display->capture_list);
 238
 239         private_capture->target = TDM_CAPTURE_TARGET_OUTPUT;
 240         private_capture->private_display = private_display;
 241         private_capture->private_output = private_output;
 242         private_capture->private_layer = NULL;
 243         private_capture->capture_backend = capture_backend;
 244         private_capture->owner_tid = syscall(SYS_gettid);
 245
 246         LIST_INITHEAD(&private_capture->pending_buffer_list);
 247         LIST_INITHEAD(&private_capture->buffer_list);
 248
 249         TDM_DBG("capture(%p) create", private_capture);
 250
 251         if (error)
 252                 *error = TDM_ERROR_NONE;
 253
 254         return private_capture;
 255 }
 256
 257 INTERN tdm_private_capture *
 258 tdm_capture_create_layer_internal(tdm_private_layer *private_layer,
 259                                                                   tdm_error *error)
 260 {
 261         tdm_private_output *private_output = private_layer->private_output;
 262         tdm_private_display *private_display = private_output->private_display;
 263         tdm_func_layer *func_layer = &private_display->func_layer;
 264         tdm_func_capture *func_capture = &private_display->func_capture;
 265         tdm_private_capture *private_capture = NULL;
 266         tdm_capture *capture_backend = NULL;
 267         tdm_error ret = TDM_ERROR_NONE;
 268
 269         TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), NULL);
 270
 271         if (!(private_display->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE)) {
 272                 TDM_ERR("no capture capability");
 273                 if (error)
 274                         *error = TDM_ERROR_NO_CAPABILITY;
 275                 return NULL;
 276         }
 277
 278         if (!(private_display->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_LAYER)) {
 279                 TDM_ERR("no layer capture capability");
 280                 if (error)
 281                         *error = TDM_ERROR_NO_CAPABILITY;
 282                 return NULL;
 283         }
 284
 285         capture_backend = func_layer->layer_create_capture(private_layer->layer_backend,
 286                                           &ret);
 287         if (ret != TDM_ERROR_NONE)
 288                 return NULL;
 289
 290         private_capture = calloc(1, sizeof(tdm_private_capture));
 291         if (!private_capture) {
 292                 TDM_ERR("failed: alloc memory");
 293                 func_capture->capture_destroy(capture_backend);
 294                 if (error)
 295                         *error = TDM_ERROR_OUT_OF_MEMORY;
 296                 return NULL;
 297         }
 298
 299         private_capture->stamp = tdm_helper_get_time();
 300         while (tdm_capture_find_stamp(private_display, private_capture->stamp))
 301                 private_capture->stamp++;
 302
 303         LIST_ADD(&private_capture->link, &private_layer->capture_list);
 304         LIST_ADD(&private_capture->display_link, &private_display->capture_list);
 305
 306         private_capture->target = TDM_CAPTURE_TARGET_LAYER;
 307         private_capture->private_display = private_display;
 308         private_capture->private_output = private_output;
 309         private_capture->private_layer = private_layer;
 310         private_capture->capture_backend = capture_backend;
 311         private_capture->owner_tid = syscall(SYS_gettid);
 312
 313         LIST_INITHEAD(&private_capture->pending_buffer_list);
 314         LIST_INITHEAD(&private_capture->buffer_list);
 315
 316         TDM_DBG("capture(%p) create", private_capture);
 317
 318         if (error)
 319                 *error = TDM_ERROR_NONE;
 320
 321         return private_capture;
 322 }
 323
 324 INTERN void
 325 tdm_capture_destroy_internal(tdm_private_capture *private_capture)
 326 {
 327         tdm_private_display *private_display;
 328         tdm_func_capture *func_capture;
 329         tdm_capture_private_buffer *b = NULL, *bb = NULL;
 330         struct list_head clone_list;
 331
 332         TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 333
 334         if (!private_capture)
 335                 return;
 336
 337         private_display = private_capture->private_display;
 338
 339         LIST_DEL(&private_capture->link);
 340         LIST_DEL(&private_capture->display_link);
 341
 342         func_capture = &private_capture->private_display->func_capture;
 343         func_capture->capture_destroy(private_capture->capture_backend);
 344
 345         if (!LIST_IS_EMPTY(&private_capture->pending_buffer_list)) {
 346                 TDM_WRN("capture(%p) not finished:", private_capture);
 347                 _tdm_capture_print_list(&private_capture->pending_buffer_list);
 348
 349                 LIST_INITHEAD(&clone_list);
 350                 LIST_FOR_EACH_ENTRY_SAFE(b, bb, &private_capture->pending_buffer_list, link) {
 351                         LIST_DEL(&b->link);
 352                         LIST_ADDTAIL(&b->link, &clone_list);
 353                 }
 354
 355                 _pthread_mutex_unlock(&private_display->lock);
 356                 LIST_FOR_EACH_ENTRY_SAFE(b, bb, &clone_list, link) {
 357                         LIST_DEL(&b->link);
 358                         tdm_buffer_unref_backend(b->buffer);
 359                         free(b);
 360                 }
 361                 _pthread_mutex_lock(&private_display->lock);
 362         }
 363
 364         if (!LIST_IS_EMPTY(&private_capture->buffer_list)) {
 365                 TDM_WRN("capture(%p) not finished:", private_capture);
 366                 _tdm_capture_print_list(&private_capture->buffer_list);
 367
 368                 LIST_INITHEAD(&clone_list);
 369                 LIST_FOR_EACH_ENTRY_SAFE(b, bb, &private_capture->buffer_list, link) {
 370                         LIST_DEL(&b->link);
 371                         LIST_ADDTAIL(&b->link, &clone_list);
 372                 }
 373
 374                 _pthread_mutex_unlock(&private_display->lock);
 375                 LIST_FOR_EACH_ENTRY_SAFE(b, bb, &clone_list, link) {
 376                         LIST_DEL(&b->link);
 377                         tdm_buffer_unref_backend(b->buffer);
 378                         free(b);
 379                 }
 380                 _pthread_mutex_lock(&private_display->lock);
 381         }
 382
 383         private_capture->stamp = 0;
 384         free(private_capture);
 385 }
 386
 387 EXTERN void
 388 tdm_capture_destroy(tdm_capture *capture)
 389 {
 390         tdm_private_capture *private_capture = capture;
 391         tdm_private_display *private_display;
 392
 393         if (!private_capture)
 394                 return;
 395
 396         TDM_DBG("capture(%p) destroy", private_capture);
 397
 398         private_display = private_capture->private_display;
 399
 400         _pthread_mutex_lock(&private_display->lock);
 401         tdm_capture_destroy_internal(private_capture);
 402         _pthread_mutex_unlock(&private_display->lock);
 403 }
 404
 405 EXTERN tdm_error
 406 tdm_capture_set_info(tdm_capture *capture, tdm_info_capture *info)
 407 {
 408         CAPTURE_FUNC_ENTRY();
 409
 410         TDM_RETURN_VAL_IF_FAIL(info != NULL, TDM_ERROR_INVALID_PARAMETER);
 411         TDM_RETURN_VAL_IF_FAIL(info->type != 0, TDM_ERROR_INVALID_PARAMETER);
 412
 413         _pthread_mutex_lock(&private_display->lock);
 414
 415         if (!func_capture->capture_set_info) {
 416                 _pthread_mutex_unlock(&private_display->lock);
 417                 TDM_DBG("failed: not implemented!!");
 418                 return TDM_ERROR_NOT_IMPLEMENTED;
 419         }
 420
 421         if (info->type == TDM_CAPTURE_TYPE_STREAM && info->frequency == 0) {
 422                 tdm_private_output *private_output = private_capture->private_output;
 423                 info->frequency = private_output->current_mode->vrefresh;
 424         }
 425
 426         TDM_INFO("capture(%p) info: dst(%dx%d %d,%d %dx%d %c%c%c%c) trans(%d) type(%d) freq(%d) flags(%x)",
 427                          private_capture,
 428                          info->dst_config.size.h, info->dst_config.size.v,
 429                          info->dst_config.pos.x, info->dst_config.pos.y,
 430                          info->dst_config.pos.w, info->dst_config.pos.h,
 431                          FOURCC_STR(info->dst_config.format),
 432                          info->transform, info->type, info->frequency, info->flags);
 433
 434         ret = func_capture->capture_set_info(private_capture->capture_backend, info);
 435         TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 436
 437         private_capture->info = *info;
 438
 439         _pthread_mutex_unlock(&private_display->lock);
 440
 441         return ret;
 442 }
 443
 444 EXTERN tdm_error
 445 tdm_capture_set_done_handler(tdm_capture *capture, tdm_capture_done_handler func, void *user_data)
 446 {
 447         tdm_private_display *private_display;
 448         tdm_private_capture *private_capture;
 449         tdm_error ret = TDM_ERROR_NONE;
 450
 451         TDM_RETURN_VAL_IF_FAIL(capture != NULL, TDM_ERROR_INVALID_PARAMETER);
 452
 453         private_capture = (tdm_private_capture*)capture;
 454         private_display = private_capture->private_display;
 455
 456         TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
 457
 458         _pthread_mutex_lock(&private_display->lock);
 459
 460         private_capture->done_func = func;
 461         private_capture->done_user_data = user_data;
 462
 463         _pthread_mutex_unlock(&private_display->lock);
 464
 465         return ret;
 466 }
 467
 468 EXTERN tdm_error
 469 tdm_capture_attach(tdm_capture *capture, tbm_surface_h buffer)
 470 {
 471         tdm_capture_private_buffer *capture_buffer;
 472
 473         CAPTURE_FUNC_ENTRY();
 474
 475         TDM_RETURN_VAL_IF_FAIL(buffer != NULL, TDM_ERROR_INVALID_PARAMETER);
 476
 477         _pthread_mutex_lock(&private_display->lock);
 478
 479         if (!func_capture->capture_attach) {
 480                 _pthread_mutex_unlock(&private_display->lock);
 481                 TDM_DBG("failed: not implemented!!");
 482                 return TDM_ERROR_NOT_IMPLEMENTED;
 483         }
 484
 485         if (tdm_display_check_module_abi(private_display, 1, 2) &&
 486                 private_display->caps_capture.max_attach_count > 0) {
 487                 int length = LIST_LENGTH(&private_capture->pending_buffer_list) +
 488                                          LIST_LENGTH(&private_capture->buffer_list);
 489                 if (length >= private_display->caps_capture.max_attach_count) {
 490                         _pthread_mutex_unlock(&private_display->lock);
 491                         TDM_DBG("failed: too many attached!! max_attach_count(%d)",
 492                                         private_display->caps_capture.max_attach_count);
 493                         return TDM_ERROR_BAD_REQUEST;
 494                 }
 495         }
 496
 497         capture_buffer = calloc(1, sizeof * capture_buffer);
 498         if (!capture_buffer) {
 499                 _pthread_mutex_unlock(&private_display->lock);
 500                 TDM_ERR("alloc failed");
 501                 return TDM_ERROR_OUT_OF_MEMORY;
 502         }
 503
 504         ret = func_capture->capture_attach(private_capture->capture_backend, buffer);
 505         TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 506
 507         if (ret != TDM_ERROR_NONE) {
 508                 free(capture_buffer);
 509                 _pthread_mutex_unlock(&private_display->lock);
 510                 TDM_ERR("attach failed");
 511                 return ret;
 512         }
 513
 514         LIST_ADDTAIL(&capture_buffer->link, &private_capture->pending_buffer_list);
 515         capture_buffer->buffer = tdm_buffer_ref_backend(buffer);
 516
 517         if (tdm_debug_module & TDM_DEBUG_BUFFER) {
 518                 TDM_INFO("capture(%p) attached:", private_capture);
 519                 tdm_buffer_list_dump(&private_capture->buffer_list);
 520         }
 521
 522         _pthread_mutex_unlock(&private_display->lock);
 523
 524         return ret;
 525 }
 526
 527 EXTERN tdm_error
 528 tdm_capture_commit(tdm_capture *capture)
 529 {
 530         tdm_capture_private_buffer *b = NULL, *bb = NULL;
 531         tdm_private_output *private_output;
 532         struct list_head commit_buffer_list;
 533
 534         CAPTURE_FUNC_ENTRY();
 535
 536         _pthread_mutex_lock(&private_display->lock);
 537
 538         private_output = private_capture->private_output;
 539         if (private_output->current_dpms_value > TDM_OUTPUT_DPMS_ON) {
 540                 TDM_ERR("output(%d) dpms: %s", private_output->pipe,
 541                                 tdm_dpms_str(private_output->current_dpms_value));
 542                 _pthread_mutex_unlock(&private_display->lock);
 543                 return TDM_ERROR_BAD_REQUEST;
 544         }
 545
 546         if (!func_capture->capture_commit) {
 547                 _pthread_mutex_unlock(&private_display->lock);
 548                 TDM_DBG("failed: not implemented!!");
 549                 return TDM_ERROR_NOT_IMPLEMENTED;
 550         }
 551
 552         LIST_INITHEAD(&commit_buffer_list);
 553
 554         LIST_FOR_EACH_ENTRY_SAFE(b, bb, &private_capture->pending_buffer_list, link) {
 555                 LIST_DEL(&b->link);
 556                 LIST_ADDTAIL(&b->link, &private_capture->buffer_list);
 557                 LIST_ADDTAIL(&b->commit_link, &commit_buffer_list);
 558         }
 559
 560         ret = func_capture->capture_commit(private_capture->capture_backend);
 561         TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 562
 563         LIST_FOR_EACH_ENTRY_SAFE(b, bb, &commit_buffer_list, commit_link) {
 564                 LIST_DEL(&b->commit_link);
 565
 566                 if (!_tdm_capture_find_buffer(&private_capture->buffer_list, b))
 567                         continue;
 568
 569                 if (ret != TDM_ERROR_NONE) {
 570                         /* Not to call the user release handler when failed.
 571                          * Do we have to call this function here really?
 572                          * User better use set_done_handler to know when pp is done. Using
 573                          * buffer_release_handler is not good.
 574                          */
 575                         tdm_buffer_remove_release_handler_internal(b->buffer);
 576
 577                         _pthread_mutex_unlock(&private_display->lock);
 578                         tdm_buffer_unref_backend(b->buffer);
 579                         _pthread_mutex_lock(&private_display->lock);
 580                         LIST_DEL(&b->link);
 581                 }
 582         }
 583
 584         _pthread_mutex_unlock(&private_display->lock);
 585
 586         return ret;
 587 }