src/tdm_hwc.c

   1 /**************************************************************************
   2  *
   3  * libtdm
   4  *
   5  * Copyright 2018 Samsung Electronics co., Ltd. All Rights Reserved.
   6  *
   7  * Contact: SooChan Lim <sc1.lim@samsung.com>,
   8  *          Boram Park <boram1288.park@samsung.com>,
   9  *          Changyeon Lee <cyeon.lee@samsung.com>,
  10  *          Sangjin Lee <lsj119@samsung.com>
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the
  14  * "Software"), to deal in the Software without restriction, including
  15  * without limitation the rights to use, copy, modify, merge, publish,
  16  * distribute, sub license, and/or sell copies of the Software, and to
  17  * permit persons to whom the Software is furnished to do so, subject to
  18  * the following conditions:
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  27  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  28  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  29  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  30  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31  *
  32 **************************************************************************/
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #include "tdm_private.h"
  39
  40 #define HWC_FUNC_ENTRY() \
  41         tdm_private_display *private_display; \
  42         tdm_private_output *private_output; \
  43         tdm_private_hwc *private_hwc; \
  44         tdm_error ret = TDM_ERROR_NONE; /* default TDM_ERROR_NONE */\
  45         TDM_RETURN_VAL_IF_FAIL(hwc != NULL, TDM_ERROR_INVALID_PARAMETER); \
  46         private_hwc = (tdm_private_hwc*)hwc; \
  47         private_output = private_hwc->private_output; \
  48         TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_INVALID_PARAMETER); \
  49         private_display = private_output->private_display
  50
  51 #define HWC_FUNC_ENTRY_ERROR() \
  52         tdm_private_display *private_display; \
  53         tdm_private_output *private_output; \
  54         tdm_private_hwc *private_hwc; \
  55         tdm_error ret = TDM_ERROR_NONE; /* default TDM_ERROR_NONE */\
  56         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(hwc != NULL, TDM_ERROR_INVALID_PARAMETER, NULL); \
  57         private_hwc = (tdm_private_hwc*)hwc; \
  58         private_output = private_hwc->private_output; \
  59         TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(private_output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL); \
  60         private_display = private_output->private_display
  61
  62 #define HWC_FUNC_ENTRY_VOID_RETURN() \
  63         tdm_private_display *private_display; \
  64         tdm_private_output *private_output; \
  65         tdm_private_hwc *private_hwc; \
  66         tdm_error ret = TDM_ERROR_NONE; /* default TDM_ERROR_NONE */\
  67         TDM_RETURN_IF_FAIL(hwc != NULL); \
  68         private_hwc = (tdm_private_hwc*)hwc; \
  69         private_output = private_hwc->private_output; \
  70         TDM_RETURN_IF_FAIL(private_output != NULL); \
  71         private_display = private_output->private_display
  72
  73
  74 static tdm_private_hwc_window *
  75 _tdm_hwc_find_private_hwc_window(tdm_private_hwc *private_hwc, tdm_hwc_window *hwc_window_backend)
  76 {
  77         tdm_private_hwc_window *private_hwc_window = NULL;
  78
  79         LIST_FOR_EACH_ENTRY(private_hwc_window, &private_hwc->hwc_window_list, link) {
  80                 if (private_hwc_window->hwc_window_backend == hwc_window_backend)
  81                         return private_hwc_window;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 static void
  88 _tdm_hwc_thread_cb_commit(tdm_private_display *private_display, void *object,
  89                                 tdm_thread_cb_base *cb_base, void *user_data)
  90 {
  91         tdm_thread_cb_hwc_commit *hwc_commit = (tdm_thread_cb_hwc_commit *)cb_base;
  92         tdm_private_hwc_commit_handler *hwc_commit_handler = hwc_commit->base.data;
  93         tdm_private_hwc *private_hwc = object;
  94
  95         TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
  96
  97         if (!hwc_commit_handler)
  98                 return;
  99
 100         assert(hwc_commit_handler->owner_tid == syscall(SYS_gettid));
 101
 102         tdm_thread_cb_remove(private_hwc, TDM_THREAD_CB_HWC_COMMIT, hwc_commit_handler,
 103                                         _tdm_hwc_thread_cb_commit, NULL);
 104
 105         LIST_DEL(&hwc_commit_handler->link);
 106
 107         if (tdm_debug_module & TDM_DEBUG_COMMIT) {
 108                 TDM_INFO("----------------------------------------- hwc(%d) committed", private_hwc->index);
 109                 TDM_INFO("handler(%p)", hwc_commit_handler);
 110         }
 111
 112         if (hwc_commit_handler->func) {
 113                 _pthread_mutex_unlock(&private_display->lock);
 114                 hwc_commit_handler->func(private_hwc,
 115                                                                         hwc_commit->sequence,
 116                                                                         hwc_commit->tv_sec,
 117                                                                         hwc_commit->tv_usec,
 118                                                                         hwc_commit_handler->user_data);
 119                 _pthread_mutex_lock(&private_display->lock);
 120         }
 121
 122         free(hwc_commit_handler);
 123
 124         if (tdm_debug_module & TDM_DEBUG_COMMIT)
 125                 TDM_INFO("-----------------------------------------...");
 126 }
 127
 128 static void
 129 _tdm_hwc_cb_commit(tdm_hwc *hwc_backend, unsigned int sequence,
 130                                           unsigned int tv_sec, unsigned int tv_usec, void *user_data)
 131 {
 132         tdm_private_hwc_commit_handler *hwc_commit_handler = user_data;
 133         tdm_private_hwc *private_hwc;
 134         tdm_thread_cb_hwc_commit hwc_commit;
 135         tdm_error ret;
 136
 137         if (hwc_commit_handler)
 138                 private_hwc = hwc_commit_handler->private_hwc;
 139         else
 140                 private_hwc = tdm_display_find_private_hwc(tdm_display_get(), hwc_backend);
 141
 142         memset(&hwc_commit, 0, sizeof hwc_commit);
 143         hwc_commit.base.type = TDM_THREAD_CB_HWC_COMMIT;
 144         hwc_commit.base.length = sizeof hwc_commit;
 145         hwc_commit.base.object_stamp = private_hwc->stamp;
 146         hwc_commit.base.data = hwc_commit_handler;
 147         hwc_commit.base.sync = 0;
 148         hwc_commit.sequence = sequence;
 149         hwc_commit.tv_sec = tv_sec;
 150         hwc_commit.tv_usec = tv_usec;
 151
 152         ret = tdm_thread_cb_call(private_hwc, &hwc_commit.base, 1);
 153         TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 154 }
 155
 156 INTERN tdm_error
 157 tdm_hwc_init(tdm_private_display *private_display)
 158 {
 159         tdm_thread_cb_set_find_func(TDM_THREAD_CB_HWC_COMMIT, tdm_display_find_hwc_stamp);
 160
 161         return TDM_ERROR_NONE;
 162 }
 163
 164 EXTERN tdm_hwc_window *
 165 tdm_hwc_create_window(tdm_hwc *hwc, tdm_error *error)
 166 {
 167         tdm_hwc_window *hwc_window = NULL;
 168
 169         HWC_FUNC_ENTRY_ERROR();
 170
 171         _pthread_mutex_lock(&private_display->lock);
 172
 173         hwc_window = (tdm_hwc_window *)tdm_hwc_window_create_internal(private_hwc, error);
 174
 175         _pthread_mutex_unlock(&private_display->lock);
 176
 177         return hwc_window;
 178 }
 179
 180 EXTERN tdm_error
 181 tdm_hwc_get_video_supported_formats(tdm_hwc *hwc, const tbm_format **formats, int *count)
 182 {
 183         tdm_private_module *private_module;
 184         tdm_func_hwc *func_hwc;
 185
 186         HWC_FUNC_ENTRY();
 187
 188         TDM_RETURN_VAL_IF_FAIL(formats != NULL, TDM_ERROR_INVALID_PARAMETER);
 189         TDM_RETURN_VAL_IF_FAIL(count != NULL, TDM_ERROR_INVALID_PARAMETER);
 190
 191         _pthread_mutex_lock(&private_display->lock);
 192
 193         private_module = private_output->private_module;
 194         func_hwc = &private_module->func_hwc;
 195
 196         if (!func_hwc->hwc_get_video_supported_formats) {
 197                 /* LCOV_EXCL_START */
 198                 _pthread_mutex_unlock(&private_display->lock);
 199                 TDM_WRN("not implemented!!");
 200                 return TDM_ERROR_NOT_IMPLEMENTED;
 201                 /* LCOV_EXCL_STOP */
 202         }
 203
 204         ret = func_hwc->hwc_get_video_supported_formats(private_hwc->hwc_backend, formats, count);
 205
 206         _pthread_mutex_unlock(&private_display->lock);
 207
 208         return ret;
 209 }
 210
 211 EXTERN tdm_error
 212 tdm_hwc_get_video_capability(tdm_hwc *hwc,
 213                                                         tdm_hwc_video_capability *video_capability)
 214 {
 215         tdm_private_module *private_module;
 216         tdm_func_hwc *func_hwc;
 217
 218         HWC_FUNC_ENTRY();
 219
 220         _pthread_mutex_lock(&private_display->lock);
 221
 222         private_module = private_output->private_module;
 223         func_hwc = &private_module->func_hwc;
 224
 225         if (!func_hwc->hwc_get_video_capability) {
 226                 _pthread_mutex_unlock(&private_display->lock);
 227                 TDM_WRN("not implemented!!");
 228                 return TDM_ERROR_NOT_IMPLEMENTED;
 229         }
 230
 231         ret = func_hwc->hwc_get_video_capability(private_hwc->hwc_backend,
 232                                                                                         video_capability);
 233
 234         _pthread_mutex_unlock(&private_display->lock);
 235
 236         return ret;
 237 }
 238
 239 EXTERN tdm_error
 240 tdm_hwc_get_available_properties(tdm_hwc *hwc, const tdm_prop **props, int *count)
 241 {
 242         tdm_private_module *private_module;
 243         tdm_func_hwc *func_hwc = NULL;
 244
 245         HWC_FUNC_ENTRY();
 246
 247         TDM_RETURN_VAL_IF_FAIL(props != NULL, TDM_ERROR_INVALID_PARAMETER);
 248         TDM_RETURN_VAL_IF_FAIL(count != NULL, TDM_ERROR_INVALID_PARAMETER);
 249
 250         _pthread_mutex_lock(&private_display->lock);
 251
 252         private_module = private_output->private_module;
 253         func_hwc = &private_module->func_hwc;
 254
 255         if (!func_hwc->hwc_get_available_properties) {
 256                 /* LCOV_EXCL_START */
 257                 _pthread_mutex_unlock(&private_display->lock);
 258                 TDM_WRN("not implemented!!");
 259                 return TDM_ERROR_NOT_IMPLEMENTED;
 260                 /* LCOV_EXCL_STOP */
 261         }
 262
 263         ret = func_hwc->hwc_get_available_properties(private_hwc->hwc_backend, props, count);
 264
 265         _pthread_mutex_unlock(&private_display->lock);
 266
 267         return ret;
 268 }
 269
 270 EXTERN tbm_surface_queue_h
 271 tdm_hwc_get_client_target_buffer_queue(tdm_hwc *hwc, tdm_error *error)
 272 {
 273         tdm_private_module *private_module;
 274         tdm_func_hwc *func_hwc = NULL;
 275         tbm_surface_queue_h queue = NULL;
 276
 277         HWC_FUNC_ENTRY_ERROR();
 278
 279         _pthread_mutex_lock(&private_display->lock);
 280
 281         private_module = private_hwc->private_module;
 282         func_hwc = &private_module->func_hwc;
 283
 284         if (!func_hwc->hwc_get_client_target_buffer_queue) {
 285                 /* LCOV_EXCL_START */
 286                 _pthread_mutex_unlock(&private_display->lock);
 287                 TDM_WRN("not implemented!!");
 288                 return NULL;
 289                 /* LCOV_EXCL_STOP */
 290         }
 291
 292         queue = func_hwc->hwc_get_client_target_buffer_queue(private_hwc->hwc_backend, error);
 293
 294         _pthread_mutex_unlock(&private_display->lock);
 295
 296         return queue;
 297 }
 298
 299 EXTERN tdm_error
 300 tdm_hwc_set_client_target_buffer(tdm_hwc *hwc, tbm_surface_h target_buffer, tdm_region damage)
 301 {
 302         tdm_private_module *private_module;
 303         tdm_func_hwc *func_hwc = NULL;
 304
 305         HWC_FUNC_ENTRY();
 306
 307         _pthread_mutex_lock(&private_display->lock);
 308
 309         if (tdm_debug_dump & TDM_DUMP_FLAG_WINDOW) {
 310                 /* LCOV_EXCL_START */
 311                 char str[TDM_PATH_LEN];
 312                 static int i;
 313                 snprintf(str, TDM_PATH_LEN, "target_window_%03d", i++);
 314                 tdm_helper_dump_buffer_str(target_buffer, tdm_debug_dump_dir, str);
 315                 /* LCOV_EXCL_STOP */
 316         }
 317
 318         private_module = private_hwc->private_module;
 319         func_hwc = &private_module->func_hwc;
 320
 321         if (!func_hwc->hwc_set_client_target_buffer) {
 322                 /* LCOV_EXCL_START */
 323                 _pthread_mutex_unlock(&private_display->lock);
 324                 TDM_WRN("not implemented!!");
 325                 return TDM_ERROR_NOT_IMPLEMENTED;
 326                 /* LCOV_EXCL_STOP */
 327         }
 328
 329         ret = func_hwc->hwc_set_client_target_buffer(private_hwc->hwc_backend, target_buffer, damage);
 330
 331         _pthread_mutex_unlock(&private_display->lock);
 332
 333         return ret;
 334 }
 335
 336
 337 EXTERN tdm_error
 338 tdm_hwc_validate(tdm_hwc *hwc, tdm_hwc_window **composited_wnds, uint32_t num_wnds, uint32_t *num_types)
 339 {
 340         tdm_private_module *private_module;
 341         tdm_func_hwc *func_hwc = NULL;
 342         tdm_private_hwc_window **composited_wnds_frontend = NULL;
 343         tdm_hwc_window **composited_wnds_backend = NULL;
 344         int i;
 345
 346         HWC_FUNC_ENTRY();
 347
 348         TDM_RETURN_VAL_IF_FAIL(num_types != NULL, TDM_ERROR_INVALID_PARAMETER);
 349
 350         _pthread_mutex_lock(&private_display->lock);
 351
 352         private_module = private_hwc->private_module;
 353         func_hwc = &private_module->func_hwc;
 354
 355         if (!func_hwc->hwc_validate) {
 356                 /* LCOV_EXCL_START */
 357                 _pthread_mutex_unlock(&private_display->lock);
 358                 TDM_WRN("not implemented!!");
 359                 return TDM_ERROR_NOT_IMPLEMENTED;
 360                 /* LCOV_EXCL_STOP */
 361         }
 362
 363         if (num_wnds == 0) {
 364                 ret = func_hwc->hwc_validate(private_hwc->hwc_backend, NULL, 0, num_types);
 365
 366                 _pthread_mutex_unlock(&private_display->lock);
 367                 return ret;
 368         }
 369
 370         composited_wnds_backend = calloc(num_wnds, sizeof(tdm_hwc_window *));
 371         if (!composited_wnds_backend) {
 372                 /* LCOV_EXCL_START */
 373                 _pthread_mutex_unlock(&private_display->lock);
 374                 return TDM_ERROR_OUT_OF_MEMORY;
 375                 /* LCOV_EXCL_STOP */
 376         }
 377
 378         composited_wnds_frontend = (tdm_private_hwc_window **)composited_wnds;
 379
 380         for (i = 0; i < num_wnds; i++)
 381                 composited_wnds_backend[i] = composited_wnds_frontend[i]->hwc_window_backend;
 382
 383         ret = func_hwc->hwc_validate(private_hwc->hwc_backend, composited_wnds_backend,
 384                                                                 num_wnds, num_types);
 385
 386         free(composited_wnds_backend);
 387
 388         _pthread_mutex_unlock(&private_display->lock);
 389
 390         return ret;
 391 }
 392
 393 EXTERN tdm_error
 394 tdm_hwc_get_changed_composition_types(tdm_hwc *hwc, uint32_t *num_elements,
 395                                                                 tdm_hwc_window **hwc_window,
 396                                                                 tdm_hwc_window_composition *composition_types)
 397 {
 398         tdm_private_module *private_module;
 399         tdm_func_hwc *func_hwc = NULL;
 400         tdm_private_hwc_window * private_hwc_window = NULL;
 401         int i = 0;
 402
 403         HWC_FUNC_ENTRY();
 404
 405         TDM_RETURN_VAL_IF_FAIL(num_elements != NULL, TDM_ERROR_INVALID_PARAMETER);
 406
 407         _pthread_mutex_lock(&private_display->lock);
 408
 409         private_module = private_hwc->private_module;
 410         func_hwc = &private_module->func_hwc;
 411
 412         if (!func_hwc->hwc_get_changed_composition_types) {
 413                 /* LCOV_EXCL_START */
 414                 _pthread_mutex_unlock(&private_display->lock);
 415                 TDM_WRN("not implemented!!");
 416                 return TDM_ERROR_NOT_IMPLEMENTED;
 417                 /* LCOV_EXCL_STOP */
 418         }
 419
 420         ret = func_hwc->hwc_get_changed_composition_types(private_hwc->hwc_backend,
 421                                                         num_elements, hwc_window, composition_types);
 422         if (ret != TDM_ERROR_NONE) {
 423                 /* LCOV_EXCL_START */
 424                 _pthread_mutex_unlock(&private_display->lock);
 425                 return ret;
 426                 /* LCOV_EXCL_STOP */
 427         }
 428
 429         if (hwc_window == NULL || composition_types == NULL) {
 430                 _pthread_mutex_unlock(&private_display->lock);
 431                 return TDM_ERROR_NONE;
 432         }
 433
 434         for (i = 0; i < *num_elements; i++) {
 435                 private_hwc_window = _tdm_hwc_find_private_hwc_window(private_hwc, hwc_window[i]);
 436                 if (private_hwc_window == NULL) {
 437                         /* LCOV_EXCL_START */
 438                         TDM_ERR("failed! This should never happen!");
 439                         tdm_hwc_window_destroy_internal(private_hwc_window);
 440                         *num_elements = 0;
 441                         _pthread_mutex_unlock(&private_display->lock);
 442                         return TDM_ERROR_OPERATION_FAILED;
 443                         /* LCOV_EXCL_STOP */
 444                 }
 445
 446                 hwc_window[i] = (tdm_hwc_window*)private_hwc_window;
 447         }
 448
 449         _pthread_mutex_unlock(&private_display->lock);
 450
 451         return ret;
 452 }
 453
 454 EXTERN tdm_error
 455 tdm_hwc_accept_validation(tdm_hwc *hwc)
 456 {
 457         tdm_private_module *private_module;
 458         tdm_func_hwc *func_hwc = NULL;
 459
 460         HWC_FUNC_ENTRY();
 461
 462         _pthread_mutex_lock(&private_display->lock);
 463
 464         private_module = private_hwc->private_module;
 465         func_hwc = &private_module->func_hwc;
 466
 467         if (!func_hwc->hwc_validate) {
 468                 /* LCOV_EXCL_START */
 469                 _pthread_mutex_unlock(&private_display->lock);
 470                 TDM_WRN("not implemented!!");
 471                 return TDM_ERROR_NOT_IMPLEMENTED;
 472                 /* LCOV_EXCL_STOP */
 473         }
 474
 475         ret = func_hwc->hwc_accept_validation(private_hwc->hwc_backend);
 476
 477         _pthread_mutex_unlock(&private_display->lock);
 478
 479         return ret;
 480 }
 481
 482 /* temporary prototype to avoid build break */
 483 tdm_error
 484 tdm_hwc_accept_changes(tdm_hwc *hwc)
 485 {
 486    return tdm_hwc_accept_validation(hwc);
 487 }
 488
 489 EXTERN tdm_error
 490 tdm_hwc_commit(tdm_hwc *hwc, int sync, tdm_hwc_commit_handler func, void *user_data)
 491 {
 492         tdm_private_module *private_module;
 493         tdm_func_hwc *func_hwc = NULL;
 494         tdm_private_hwc_commit_handler *hwc_commit_handler = NULL;
 495
 496         HWC_FUNC_ENTRY();
 497
 498         _pthread_mutex_lock(&private_display->lock);
 499
 500         private_module = private_hwc->private_module;
 501         func_hwc = &private_module->func_hwc;
 502
 503         if (!func_hwc->hwc_commit) {
 504                 /* LCOV_EXCL_START */
 505                 TDM_WRN("not implemented!!");
 506                 _pthread_mutex_unlock(&private_display->lock);
 507                 return TDM_ERROR_NOT_IMPLEMENTED;
 508                 /* LCOV_EXCL_STOP */
 509         }
 510
 511 //TODO: I am not sure yet whether we have to check the dpms at hwc_commit.
 512 #if 0
 513         /* check if the dpms is off */
 514         if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(private_output->current_dpms_value)) {
 515                 TDM_ERR("hwc(%d) dpms: %s", private_hwc->index,
 516                                 tdm_dpms_str(private_output->current_dpms_value));
 517                 _pthread_mutex_unlock(&private_display->lock);
 518                 return TDM_ERROR_DPMS_OFF;
 519         }
 520 #endif
 521
 522         if (tdm_debug_module & TDM_DEBUG_COMMIT)
 523                 TDM_INFO("hwc(%d) commit", private_hwc->index);
 524
 525         if (!private_hwc->regist_commit_cb) {
 526                 private_hwc->regist_commit_cb = 1;
 527                 ret = func_hwc->hwc_set_commit_handler(private_hwc->hwc_backend, _tdm_hwc_cb_commit);
 528                 /* LCOV_EXCL_START */
 529                 if (ret != TDM_ERROR_NONE) {
 530                         private_hwc->regist_commit_cb = 0;
 531                         TDM_ERR("hwc(%d) fail to set hwc_set_commit_handler", private_hwc->index);
 532                         _pthread_mutex_unlock(&private_display->lock);
 533                         return ret;
 534                 /* LCOV_EXCL_STOP */
 535                 }
 536         }
 537
 538         hwc_commit_handler = calloc(1, sizeof(tdm_private_hwc_commit_handler));
 539         if (!hwc_commit_handler) {
 540                 /* LCOV_EXCL_START */
 541                 TDM_ERR("failed: alloc memory");
 542                 _pthread_mutex_unlock(&private_display->lock);
 543                 return TDM_ERROR_OUT_OF_MEMORY;
 544                 /* LCOV_EXCL_STOP */
 545         }
 546
 547         ret = tdm_thread_cb_add(private_hwc, TDM_THREAD_CB_HWC_COMMIT, hwc_commit_handler,
 548                                         _tdm_hwc_thread_cb_commit, NULL);
 549         if (ret != TDM_ERROR_NONE) {
 550                 TDM_ERR("tdm_thread_cb_add failed");
 551                 free(hwc_commit_handler);
 552                 _pthread_mutex_unlock(&private_display->lock);
 553                 return ret;
 554         }
 555
 556         LIST_ADDTAIL(&hwc_commit_handler->link, &private_hwc->hwc_commit_handler_list);
 557         hwc_commit_handler->private_hwc = private_hwc;
 558         hwc_commit_handler->func = func;
 559         hwc_commit_handler->user_data = user_data;
 560         hwc_commit_handler->owner_tid = syscall(SYS_gettid);
 561
 562         ret = func_hwc->hwc_commit(private_hwc->hwc_backend, sync, hwc_commit_handler);
 563         TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, commit_failed);
 564
 565         if (tdm_debug_module & TDM_DEBUG_COMMIT)
 566                 TDM_INFO("hwc(%d) backend commit: handle(%p) func(%p) user_data(%p)",
 567                                 private_hwc->index, hwc_commit_handler, func, user_data);
 568
 569         _pthread_mutex_unlock(&private_display->lock);
 570
 571         return ret;
 572
 573 commit_failed:
 574         /* LCOV_EXCL_START */
 575         if (hwc_commit_handler) {
 576                 tdm_thread_cb_remove(private_hwc, TDM_THREAD_CB_HWC_COMMIT, hwc_commit_handler,
 577                                                 _tdm_hwc_thread_cb_commit, NULL);
 578                 LIST_DEL(&hwc_commit_handler->link);
 579                 free(hwc_commit_handler);
 580         }
 581
 582         _pthread_mutex_unlock(&private_display->lock);
 583
 584         return ret;
 585         /* LCOV_EXCL_STOP */
 586 }