drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c

   1 /*
   2  * Copyright 2019 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: AMD
  23  *
  24  */
  25
  26 #include "hdcp.h"
  27
  28 static void push_error_status(struct mod_hdcp *hdcp,
  29                 enum mod_hdcp_status status)
  30 {
  31         struct mod_hdcp_trace *trace = &hdcp->connection.trace;
  32
  33         if (trace->error_count < MAX_NUM_OF_ERROR_TRACE) {
  34                 trace->errors[trace->error_count].status = status;
  35                 trace->errors[trace->error_count].state_id = hdcp->state.id;
  36                 trace->error_count++;
  37                 HDCP_ERROR_TRACE(hdcp, status);
  38         }
  39
  40         if (is_hdcp1(hdcp)) {
  41                 hdcp->connection.hdcp1_retry_count++;
  42                 if (hdcp->connection.hdcp1_retry_count == MAX_NUM_OF_ATTEMPTS)
  43                         hdcp->connection.link.adjust.hdcp1.disable = 1;
  44         } else if (is_hdcp2(hdcp)) {
  45                 hdcp->connection.hdcp2_retry_count++;
  46                 if (hdcp->connection.hdcp2_retry_count == MAX_NUM_OF_ATTEMPTS)
  47                         hdcp->connection.link.adjust.hdcp2.disable = 1;
  48         }
  49 }
  50
  51 static uint8_t is_cp_desired_hdcp1(struct mod_hdcp *hdcp)
  52 {
  53         int i, is_auth_needed = 0;
  54
  55         /* if all displays on the link don't need authentication,
  56          * hdcp is not desired
  57          */
  58         for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
  59                 if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
  60                                 hdcp->displays[i].adjust.disable != MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION) {
  61                         is_auth_needed = 1;
  62                         break;
  63                 }
  64         }
  65
  66         return is_auth_needed &&
  67                         !hdcp->connection.link.adjust.hdcp1.disable &&
  68                         !hdcp->connection.is_hdcp1_revoked;
  69 }
  70
  71 static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp)
  72 {
  73         int i, is_auth_needed = 0;
  74
  75         /* if all displays on the link don't need authentication,
  76          * hdcp is not desired
  77          */
  78         for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
  79                 if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
  80                                 hdcp->displays[i].adjust.disable != MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION) {
  81                         is_auth_needed = 1;
  82                         break;
  83                 }
  84         }
  85
  86         return is_auth_needed &&
  87                         !hdcp->connection.link.adjust.hdcp2.disable &&
  88                         !hdcp->connection.is_hdcp2_revoked;
  89 }
  90
  91 static enum mod_hdcp_status execution(struct mod_hdcp *hdcp,
  92                 struct mod_hdcp_event_context *event_ctx,
  93                 union mod_hdcp_transition_input *input)
  94 {
  95         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
  96
  97         if (is_in_initialized_state(hdcp)) {
  98                 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
  99                         event_ctx->unexpected_event = 1;
 100                         goto out;
 101                 }
 102                 /* initialize transition input */
 103                 memset(input, 0, sizeof(union mod_hdcp_transition_input));
 104         } else if (is_in_cp_not_desired_state(hdcp)) {
 105                 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
 106                         event_ctx->unexpected_event = 1;
 107                         goto out;
 108                 }
 109         } else if (is_in_hdcp1_states(hdcp)) {
 110                 status = mod_hdcp_hdcp1_execution(hdcp, event_ctx, &input->hdcp1);
 111         } else if (is_in_hdcp1_dp_states(hdcp)) {
 112                 status = mod_hdcp_hdcp1_dp_execution(hdcp,
 113                                 event_ctx, &input->hdcp1);
 114         } else if (is_in_hdcp2_states(hdcp)) {
 115                 status = mod_hdcp_hdcp2_execution(hdcp, event_ctx, &input->hdcp2);
 116         } else if (is_in_hdcp2_dp_states(hdcp)) {
 117                 status = mod_hdcp_hdcp2_dp_execution(hdcp,
 118                                 event_ctx, &input->hdcp2);
 119         } else {
 120                 event_ctx->unexpected_event = 1;
 121                 goto out;
 122         }
 123 out:
 124         return status;
 125 }
 126
 127 static enum mod_hdcp_status transition(struct mod_hdcp *hdcp,
 128                 struct mod_hdcp_event_context *event_ctx,
 129                 union mod_hdcp_transition_input *input,
 130                 struct mod_hdcp_output *output)
 131 {
 132         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 133
 134         if (event_ctx->unexpected_event)
 135                 goto out;
 136
 137         if (is_in_initialized_state(hdcp)) {
 138                 if (is_dp_hdcp(hdcp))
 139                         if (is_cp_desired_hdcp2(hdcp)) {
 140                                 callback_in_ms(0, output);
 141                                 set_state_id(hdcp, output, D2_A0_DETERMINE_RX_HDCP_CAPABLE);
 142                         } else if (is_cp_desired_hdcp1(hdcp)) {
 143                                 callback_in_ms(0, output);
 144                                 set_state_id(hdcp, output, D1_A0_DETERMINE_RX_HDCP_CAPABLE);
 145                         } else {
 146                                 callback_in_ms(0, output);
 147                                 set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
 148                                 set_auth_complete(hdcp, output);
 149                         }
 150                 else if (is_hdmi_dvi_sl_hdcp(hdcp))
 151                         if (is_cp_desired_hdcp2(hdcp)) {
 152                                 callback_in_ms(0, output);
 153                                 set_state_id(hdcp, output, H2_A0_KNOWN_HDCP2_CAPABLE_RX);
 154                         } else if (is_cp_desired_hdcp1(hdcp)) {
 155                                 callback_in_ms(0, output);
 156                                 set_state_id(hdcp, output, H1_A0_WAIT_FOR_ACTIVE_RX);
 157                         } else {
 158                                 callback_in_ms(0, output);
 159                                 set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
 160                                 set_auth_complete(hdcp, output);
 161                         }
 162                 else {
 163                         callback_in_ms(0, output);
 164                         set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
 165                         set_auth_complete(hdcp, output);
 166                 }
 167         } else if (is_in_cp_not_desired_state(hdcp)) {
 168                 increment_stay_counter(hdcp);
 169         } else if (is_in_hdcp1_states(hdcp)) {
 170                 status = mod_hdcp_hdcp1_transition(hdcp,
 171                                 event_ctx, &input->hdcp1, output);
 172         } else if (is_in_hdcp1_dp_states(hdcp)) {
 173                 status = mod_hdcp_hdcp1_dp_transition(hdcp,
 174                                 event_ctx, &input->hdcp1, output);
 175         } else if (is_in_hdcp2_states(hdcp)) {
 176                 status = mod_hdcp_hdcp2_transition(hdcp,
 177                                 event_ctx, &input->hdcp2, output);
 178         } else if (is_in_hdcp2_dp_states(hdcp)) {
 179                 status = mod_hdcp_hdcp2_dp_transition(hdcp,
 180                                 event_ctx, &input->hdcp2, output);
 181         } else {
 182                 status = MOD_HDCP_STATUS_INVALID_STATE;
 183         }
 184 out:
 185         return status;
 186 }
 187
 188 static enum mod_hdcp_status reset_authentication(struct mod_hdcp *hdcp,
 189                 struct mod_hdcp_output *output)
 190 {
 191         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 192
 193         if (is_hdcp1(hdcp)) {
 194                 if (hdcp->auth.trans_input.hdcp1.create_session != UNKNOWN) {
 195                         /* TODO - update psp to unify create session failure
 196                          * recovery between hdcp1 and 2.
 197                          */
 198                         mod_hdcp_hdcp1_destroy_session(hdcp);
 199
 200                 }
 201
 202                 HDCP_TOP_RESET_AUTH_TRACE(hdcp);
 203                 memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
 204                 memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
 205                 set_state_id(hdcp, output, HDCP_INITIALIZED);
 206         } else if (is_hdcp2(hdcp)) {
 207                 if (hdcp->auth.trans_input.hdcp2.create_session == PASS) {
 208                         status = mod_hdcp_hdcp2_destroy_session(hdcp);
 209                         if (status != MOD_HDCP_STATUS_SUCCESS) {
 210                                 output->callback_needed = 0;
 211                                 output->watchdog_timer_needed = 0;
 212                                 goto out;
 213                         }
 214                 }
 215
 216                 HDCP_TOP_RESET_AUTH_TRACE(hdcp);
 217                 memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
 218                 memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
 219                 set_state_id(hdcp, output, HDCP_INITIALIZED);
 220         } else if (is_in_cp_not_desired_state(hdcp)) {
 221                 HDCP_TOP_RESET_AUTH_TRACE(hdcp);
 222                 memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
 223                 memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
 224                 set_state_id(hdcp, output, HDCP_INITIALIZED);
 225         }
 226
 227 out:
 228         /* stop callback and watchdog requests from previous authentication*/
 229         output->watchdog_timer_stop = 1;
 230         output->callback_stop = 1;
 231         return status;
 232 }
 233
 234 static enum mod_hdcp_status reset_connection(struct mod_hdcp *hdcp,
 235                 struct mod_hdcp_output *output)
 236 {
 237         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 238
 239         memset(output, 0, sizeof(struct mod_hdcp_output));
 240
 241         status = reset_authentication(hdcp, output);
 242         if (status != MOD_HDCP_STATUS_SUCCESS)
 243                 goto out;
 244
 245         if (current_state(hdcp) != HDCP_UNINITIALIZED) {
 246                 HDCP_TOP_RESET_CONN_TRACE(hdcp);
 247                 set_state_id(hdcp, output, HDCP_UNINITIALIZED);
 248         }
 249         memset(&hdcp->connection, 0, sizeof(hdcp->connection));
 250 out:
 251         return status;
 252 }
 253
 254 /*
 255  * Implementation of functions in mod_hdcp.h
 256  */
 257 size_t mod_hdcp_get_memory_size(void)
 258 {
 259         return sizeof(struct mod_hdcp);
 260 }
 261
 262 enum mod_hdcp_status mod_hdcp_setup(struct mod_hdcp *hdcp,
 263                 struct mod_hdcp_config *config)
 264 {
 265         struct mod_hdcp_output output;
 266         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 267
 268         memset(&output, 0, sizeof(output));
 269         hdcp->config = *config;
 270         HDCP_TOP_INTERFACE_TRACE(hdcp);
 271         status = reset_connection(hdcp, &output);
 272         if (status != MOD_HDCP_STATUS_SUCCESS)
 273                 push_error_status(hdcp, status);
 274         return status;
 275 }
 276
 277 enum mod_hdcp_status mod_hdcp_teardown(struct mod_hdcp *hdcp)
 278 {
 279         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 280         struct mod_hdcp_output output;
 281
 282         HDCP_TOP_INTERFACE_TRACE(hdcp);
 283         memset(&output, 0,  sizeof(output));
 284         status = reset_connection(hdcp, &output);
 285         if (status == MOD_HDCP_STATUS_SUCCESS)
 286                 memset(hdcp, 0, sizeof(struct mod_hdcp));
 287         else
 288                 push_error_status(hdcp, status);
 289         return status;
 290 }
 291
 292 enum mod_hdcp_status mod_hdcp_add_display(struct mod_hdcp *hdcp,
 293                 struct mod_hdcp_link *link, struct mod_hdcp_display *display,
 294                 struct mod_hdcp_output *output)
 295 {
 296         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 297         struct mod_hdcp_display *display_container = NULL;
 298
 299         HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, display->index);
 300         memset(output, 0, sizeof(struct mod_hdcp_output));
 301
 302         /* skip inactive display */
 303         if (display->state != MOD_HDCP_DISPLAY_ACTIVE) {
 304                 status = MOD_HDCP_STATUS_SUCCESS;
 305                 goto out;
 306         }
 307
 308         /* check existing display container */
 309         if (get_active_display_at_index(hdcp, display->index)) {
 310                 status = MOD_HDCP_STATUS_SUCCESS;
 311                 goto out;
 312         }
 313
 314         /* find an empty display container */
 315         display_container = get_empty_display_container(hdcp);
 316         if (!display_container) {
 317                 status = MOD_HDCP_STATUS_DISPLAY_OUT_OF_BOUND;
 318                 goto out;
 319         }
 320
 321         /* reset existing authentication status */
 322         status = reset_authentication(hdcp, output);
 323         if (status != MOD_HDCP_STATUS_SUCCESS)
 324                 goto out;
 325
 326         /* reset retry counters */
 327         reset_retry_counts(hdcp);
 328
 329         /* reset error trace */
 330         memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace));
 331
 332         /* add display to connection */
 333         hdcp->connection.link = *link;
 334         *display_container = *display;
 335         status = mod_hdcp_add_display_to_topology(hdcp, display_container);
 336
 337         if (status != MOD_HDCP_STATUS_SUCCESS)
 338                 goto out;
 339
 340         /* request authentication */
 341         if (current_state(hdcp) != HDCP_INITIALIZED)
 342                 set_state_id(hdcp, output, HDCP_INITIALIZED);
 343         callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000, output);
 344 out:
 345         if (status != MOD_HDCP_STATUS_SUCCESS)
 346                 push_error_status(hdcp, status);
 347
 348         return status;
 349 }
 350
 351 enum mod_hdcp_status mod_hdcp_remove_display(struct mod_hdcp *hdcp,
 352                 uint8_t index, struct mod_hdcp_output *output)
 353 {
 354         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 355         struct mod_hdcp_display *display = NULL;
 356
 357         HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, index);
 358         memset(output, 0, sizeof(struct mod_hdcp_output));
 359
 360         /* find display in connection */
 361         display = get_active_display_at_index(hdcp, index);
 362         if (!display) {
 363                 status = MOD_HDCP_STATUS_SUCCESS;
 364                 goto out;
 365         }
 366
 367         /* stop current authentication */
 368         status = reset_authentication(hdcp, output);
 369         if (status != MOD_HDCP_STATUS_SUCCESS)
 370                 goto out;
 371
 372         /* clear retry counters */
 373         reset_retry_counts(hdcp);
 374
 375         /* reset error trace */
 376         memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace));
 377
 378         /* remove display */
 379         status = mod_hdcp_remove_display_from_topology(hdcp, index);
 380         if (status != MOD_HDCP_STATUS_SUCCESS)
 381                 goto out;
 382         memset(display, 0, sizeof(struct mod_hdcp_display));
 383
 384         /* request authentication when connection is not reset */
 385         if (current_state(hdcp) != HDCP_UNINITIALIZED)
 386                 callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000,
 387                                 output);
 388 out:
 389         if (status != MOD_HDCP_STATUS_SUCCESS)
 390                 push_error_status(hdcp, status);
 391         return status;
 392 }
 393
 394 enum mod_hdcp_status mod_hdcp_update_authentication(struct mod_hdcp *hdcp,
 395                 uint8_t index,
 396                 struct mod_hdcp_link_adjustment *link_adjust,
 397                 struct mod_hdcp_display_adjustment *display_adjust,
 398                 struct mod_hdcp_output *output)
 399 {
 400         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 401         struct mod_hdcp_display *display = NULL;
 402
 403         HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, index);
 404         memset(output, 0, sizeof(struct mod_hdcp_output));
 405
 406         /* find display in connection */
 407         display = get_active_display_at_index(hdcp, index);
 408         if (!display) {
 409                 status = MOD_HDCP_STATUS_DISPLAY_NOT_FOUND;
 410                 goto out;
 411         }
 412
 413         /* skip if no changes */
 414         if (memcmp(link_adjust, &hdcp->connection.link.adjust,
 415                         sizeof(struct mod_hdcp_link_adjustment)) == 0 &&
 416                         memcmp(display_adjust, &display->adjust,
 417                                         sizeof(struct mod_hdcp_display_adjustment)) == 0) {
 418                 status = MOD_HDCP_STATUS_SUCCESS;
 419                 goto out;
 420         }
 421
 422         /* stop current authentication */
 423         status = reset_authentication(hdcp, output);
 424         if (status != MOD_HDCP_STATUS_SUCCESS)
 425                 goto out;
 426
 427         /* clear retry counters */
 428         reset_retry_counts(hdcp);
 429
 430         /* reset error trace */
 431         memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace));
 432
 433         /* set new adjustment */
 434         hdcp->connection.link.adjust = *link_adjust;
 435         display->adjust = *display_adjust;
 436
 437         /* request authentication when connection is not reset */
 438         if (current_state(hdcp) != HDCP_UNINITIALIZED)
 439                 /* wait 100ms to debounce simultaneous updates for different indices */
 440                 callback_in_ms(100, output);
 441
 442 out:
 443         if (status != MOD_HDCP_STATUS_SUCCESS)
 444                 push_error_status(hdcp, status);
 445         return status;
 446 }
 447
 448 enum mod_hdcp_status mod_hdcp_query_display(struct mod_hdcp *hdcp,
 449                 uint8_t index, struct mod_hdcp_display_query *query)
 450 {
 451         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 452         struct mod_hdcp_display *display = NULL;
 453
 454         /* find display in connection */
 455         display = get_active_display_at_index(hdcp, index);
 456         if (!display) {
 457                 status = MOD_HDCP_STATUS_DISPLAY_NOT_FOUND;
 458                 goto out;
 459         }
 460
 461         /* populate query */
 462         query->link = &hdcp->connection.link;
 463         query->display = display;
 464         query->trace = &hdcp->connection.trace;
 465         query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
 466
 467         if (is_display_encryption_enabled(display)) {
 468                 if (is_hdcp1(hdcp)) {
 469                         query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP1_ON;
 470                 } else if (is_hdcp2(hdcp)) {
 471                         if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_0)
 472                                 query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON;
 473                         else if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_1)
 474                                 query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON;
 475                         else
 476                                 query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_ON;
 477                 }
 478         } else {
 479                 query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
 480         }
 481
 482 out:
 483         return status;
 484 }
 485
 486 enum mod_hdcp_status mod_hdcp_reset_connection(struct mod_hdcp *hdcp,
 487                 struct mod_hdcp_output *output)
 488 {
 489         enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 490
 491         HDCP_TOP_INTERFACE_TRACE(hdcp);
 492         status = reset_connection(hdcp, output);
 493         if (status != MOD_HDCP_STATUS_SUCCESS)
 494                 push_error_status(hdcp, status);
 495
 496         return status;
 497 }
 498
 499 enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp,
 500                 enum mod_hdcp_event event, struct mod_hdcp_output *output)
 501 {
 502         enum mod_hdcp_status exec_status, trans_status, reset_status, status;
 503         struct mod_hdcp_event_context event_ctx;
 504
 505         HDCP_EVENT_TRACE(hdcp, event);
 506         memset(output, 0, sizeof(struct mod_hdcp_output));
 507         memset(&event_ctx, 0, sizeof(struct mod_hdcp_event_context));
 508         event_ctx.event = event;
 509
 510         /* execute and transition */
 511         exec_status = execution(hdcp, &event_ctx, &hdcp->auth.trans_input);
 512         trans_status = transition(
 513                         hdcp, &event_ctx, &hdcp->auth.trans_input, output);
 514         if (trans_status == MOD_HDCP_STATUS_SUCCESS) {
 515                 status = MOD_HDCP_STATUS_SUCCESS;
 516         } else if (exec_status == MOD_HDCP_STATUS_SUCCESS) {
 517                 status = MOD_HDCP_STATUS_INTERNAL_POLICY_FAILURE;
 518                 push_error_status(hdcp, status);
 519         } else {
 520                 status = exec_status;
 521                 push_error_status(hdcp, status);
 522         }
 523
 524         /* reset authentication if needed */
 525         if (trans_status == MOD_HDCP_STATUS_RESET_NEEDED) {
 526                 mod_hdcp_log_ddc_trace(hdcp);
 527                 reset_status = reset_authentication(hdcp, output);
 528                 if (reset_status != MOD_HDCP_STATUS_SUCCESS)
 529                         push_error_status(hdcp, reset_status);
 530         }
 531
 532         /* Clear CP_IRQ status if needed */
 533         if (event_ctx.event == MOD_HDCP_EVENT_CPIRQ) {
 534                 status = mod_hdcp_clear_cp_irq_status(hdcp);
 535                 if (status != MOD_HDCP_STATUS_SUCCESS)
 536                         push_error_status(hdcp, status);
 537         }
 538
 539         return status;
 540 }
 541
 542 enum mod_hdcp_operation_mode mod_hdcp_signal_type_to_operation_mode(
 543                 enum signal_type signal)
 544 {
 545         enum mod_hdcp_operation_mode mode = MOD_HDCP_MODE_OFF;
 546
 547         switch (signal) {
 548         case SIGNAL_TYPE_DVI_SINGLE_LINK:
 549         case SIGNAL_TYPE_HDMI_TYPE_A:
 550                 mode = MOD_HDCP_MODE_DEFAULT;
 551                 break;
 552         case SIGNAL_TYPE_EDP:
 553         case SIGNAL_TYPE_DISPLAY_PORT:
 554         case SIGNAL_TYPE_DISPLAY_PORT_MST:
 555                 mode = MOD_HDCP_MODE_DP;
 556                 break;
 557         default:
 558                 break;
 559         }
 560
 561         return mode;
 562 }