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 #ifndef HDCP_H_ 27 #define HDCP_H_ 28 29 #include "mod_hdcp.h" 30 #include "hdcp_log.h" 31 32 #include <drm/drm_hdcp.h> 33 #include <drm/dp/drm_dp_helper.h> 34 35 enum mod_hdcp_trans_input_result { 36 UNKNOWN = 0, 37 PASS, 38 FAIL 39 }; 40 41 struct mod_hdcp_transition_input_hdcp1 { 42 uint8_t bksv_read; 43 uint8_t bksv_validation; 44 uint8_t create_session; 45 uint8_t an_write; 46 uint8_t aksv_write; 47 uint8_t ainfo_write; 48 uint8_t bcaps_read; 49 uint8_t r0p_read; 50 uint8_t rx_validation; 51 uint8_t encryption; 52 uint8_t link_maintenance; 53 uint8_t ready_check; 54 uint8_t bstatus_read; 55 uint8_t max_cascade_check; 56 uint8_t max_devs_check; 57 uint8_t device_count_check; 58 uint8_t ksvlist_read; 59 uint8_t vp_read; 60 uint8_t ksvlist_vp_validation; 61 62 uint8_t hdcp_capable_dp; 63 uint8_t binfo_read_dp; 64 uint8_t r0p_available_dp; 65 uint8_t link_integrity_check; 66 uint8_t reauth_request_check; 67 uint8_t stream_encryption_dp; 68 }; 69 70 struct mod_hdcp_transition_input_hdcp2 { 71 uint8_t hdcp2version_read; 72 uint8_t hdcp2_capable_check; 73 uint8_t create_session; 74 uint8_t ake_init_prepare; 75 uint8_t ake_init_write; 76 uint8_t rxstatus_read; 77 uint8_t ake_cert_available; 78 uint8_t ake_cert_read; 79 uint8_t ake_cert_validation; 80 uint8_t stored_km_write; 81 uint8_t no_stored_km_write; 82 uint8_t h_prime_available; 83 uint8_t h_prime_read; 84 uint8_t pairing_available; 85 uint8_t pairing_info_read; 86 uint8_t h_prime_validation; 87 uint8_t lc_init_prepare; 88 uint8_t lc_init_write; 89 uint8_t l_prime_available_poll; 90 uint8_t l_prime_read; 91 uint8_t l_prime_validation; 92 uint8_t eks_prepare; 93 uint8_t eks_write; 94 uint8_t enable_encryption; 95 uint8_t reauth_request_check; 96 uint8_t rx_id_list_read; 97 uint8_t device_count_check; 98 uint8_t rx_id_list_validation; 99 uint8_t repeater_auth_ack_write; 100 uint8_t prepare_stream_manage; 101 uint8_t stream_manage_write; 102 uint8_t stream_ready_available; 103 uint8_t stream_ready_read; 104 uint8_t stream_ready_validation; 105 106 uint8_t rx_caps_read_dp; 107 uint8_t content_stream_type_write; 108 uint8_t link_integrity_check_dp; 109 uint8_t stream_encryption_dp; 110 }; 111 112 union mod_hdcp_transition_input { 113 struct mod_hdcp_transition_input_hdcp1 hdcp1; 114 struct mod_hdcp_transition_input_hdcp2 hdcp2; 115 }; 116 117 struct mod_hdcp_message_hdcp1 { 118 uint8_t an[8]; 119 uint8_t aksv[5]; 120 uint8_t ainfo; 121 uint8_t bksv[5]; 122 uint16_t r0p; 123 uint8_t bcaps; 124 uint16_t bstatus; 125 uint8_t ksvlist[635]; 126 uint16_t ksvlist_size; 127 uint8_t vp[20]; 128 129 uint16_t binfo_dp; 130 }; 131 132 struct mod_hdcp_message_hdcp2 { 133 uint8_t hdcp2version_hdmi; 134 uint8_t rxcaps_dp[3]; 135 uint8_t rxstatus[2]; 136 137 uint8_t ake_init[12]; 138 uint8_t ake_cert[534]; 139 uint8_t ake_no_stored_km[129]; 140 uint8_t ake_stored_km[33]; 141 uint8_t ake_h_prime[33]; 142 uint8_t ake_pairing_info[17]; 143 uint8_t lc_init[9]; 144 uint8_t lc_l_prime[33]; 145 uint8_t ske_eks[25]; 146 uint8_t rx_id_list[177]; // 22 + 5 * 31 147 uint16_t rx_id_list_size; 148 uint8_t repeater_auth_ack[17]; 149 uint8_t repeater_auth_stream_manage[68]; // 6 + 2 * 31 150 uint16_t stream_manage_size; 151 uint8_t repeater_auth_stream_ready[33]; 152 uint8_t rxstatus_dp; 153 uint8_t content_stream_type_dp[2]; 154 }; 155 156 union mod_hdcp_message { 157 struct mod_hdcp_message_hdcp1 hdcp1; 158 struct mod_hdcp_message_hdcp2 hdcp2; 159 }; 160 161 struct mod_hdcp_auth_counters { 162 uint8_t stream_management_retry_count; 163 }; 164 165 /* contains values per connection */ 166 struct mod_hdcp_connection { 167 struct mod_hdcp_link link; 168 uint8_t is_repeater; 169 uint8_t is_km_stored; 170 uint8_t is_hdcp1_revoked; 171 uint8_t is_hdcp2_revoked; 172 struct mod_hdcp_trace trace; 173 uint8_t hdcp1_retry_count; 174 uint8_t hdcp2_retry_count; 175 }; 176 177 /* contains values per authentication cycle */ 178 struct mod_hdcp_authentication { 179 uint32_t id; 180 union mod_hdcp_message msg; 181 union mod_hdcp_transition_input trans_input; 182 struct mod_hdcp_auth_counters count; 183 }; 184 185 /* contains values per state change */ 186 struct mod_hdcp_state { 187 uint8_t id; 188 uint32_t stay_count; 189 }; 190 191 /* per event in a state */ 192 struct mod_hdcp_event_context { 193 enum mod_hdcp_event event; 194 uint8_t rx_id_list_ready; 195 uint8_t unexpected_event; 196 }; 197 198 struct mod_hdcp { 199 /* per link */ 200 struct mod_hdcp_config config; 201 /* per connection */ 202 struct mod_hdcp_connection connection; 203 /* per displays */ 204 struct mod_hdcp_display displays[MAX_NUM_OF_DISPLAYS]; 205 /* per authentication attempt */ 206 struct mod_hdcp_authentication auth; 207 /* per state in an authentication */ 208 struct mod_hdcp_state state; 209 /* reserved memory buffer */ 210 uint8_t buf[2025]; 211 }; 212 213 enum mod_hdcp_initial_state_id { 214 HDCP_UNINITIALIZED = 0x0, 215 HDCP_INITIAL_STATE_START = HDCP_UNINITIALIZED, 216 HDCP_INITIALIZED, 217 HDCP_CP_NOT_DESIRED, 218 HDCP_INITIAL_STATE_END = HDCP_CP_NOT_DESIRED 219 }; 220 221 enum mod_hdcp_hdcp1_state_id { 222 HDCP1_STATE_START = HDCP_INITIAL_STATE_END, 223 H1_A0_WAIT_FOR_ACTIVE_RX, 224 H1_A1_EXCHANGE_KSVS, 225 H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER, 226 H1_A45_AUTHENTICATED, 227 H1_A8_WAIT_FOR_READY, 228 H1_A9_READ_KSV_LIST, 229 HDCP1_STATE_END = H1_A9_READ_KSV_LIST 230 }; 231 232 enum mod_hdcp_hdcp1_dp_state_id { 233 HDCP1_DP_STATE_START = HDCP1_STATE_END, 234 D1_A0_DETERMINE_RX_HDCP_CAPABLE, 235 D1_A1_EXCHANGE_KSVS, 236 D1_A23_WAIT_FOR_R0_PRIME, 237 D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER, 238 D1_A4_AUTHENTICATED, 239 D1_A6_WAIT_FOR_READY, 240 D1_A7_READ_KSV_LIST, 241 HDCP1_DP_STATE_END = D1_A7_READ_KSV_LIST, 242 }; 243 244 enum mod_hdcp_hdcp2_state_id { 245 HDCP2_STATE_START = HDCP1_DP_STATE_END, 246 H2_A0_KNOWN_HDCP2_CAPABLE_RX, 247 H2_A1_SEND_AKE_INIT, 248 H2_A1_VALIDATE_AKE_CERT, 249 H2_A1_SEND_NO_STORED_KM, 250 H2_A1_READ_H_PRIME, 251 H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME, 252 H2_A1_SEND_STORED_KM, 253 H2_A1_VALIDATE_H_PRIME, 254 H2_A2_LOCALITY_CHECK, 255 H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER, 256 H2_ENABLE_ENCRYPTION, 257 H2_A5_AUTHENTICATED, 258 H2_A6_WAIT_FOR_RX_ID_LIST, 259 H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK, 260 H2_A9_SEND_STREAM_MANAGEMENT, 261 H2_A9_VALIDATE_STREAM_READY, 262 HDCP2_STATE_END = H2_A9_VALIDATE_STREAM_READY, 263 }; 264 265 enum mod_hdcp_hdcp2_dp_state_id { 266 HDCP2_DP_STATE_START = HDCP2_STATE_END, 267 D2_A0_DETERMINE_RX_HDCP_CAPABLE, 268 D2_A1_SEND_AKE_INIT, 269 D2_A1_VALIDATE_AKE_CERT, 270 D2_A1_SEND_NO_STORED_KM, 271 D2_A1_READ_H_PRIME, 272 D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME, 273 D2_A1_SEND_STORED_KM, 274 D2_A1_VALIDATE_H_PRIME, 275 D2_A2_LOCALITY_CHECK, 276 D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER, 277 D2_SEND_CONTENT_STREAM_TYPE, 278 D2_ENABLE_ENCRYPTION, 279 D2_A5_AUTHENTICATED, 280 D2_A6_WAIT_FOR_RX_ID_LIST, 281 D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK, 282 D2_A9_SEND_STREAM_MANAGEMENT, 283 D2_A9_VALIDATE_STREAM_READY, 284 HDCP2_DP_STATE_END = D2_A9_VALIDATE_STREAM_READY, 285 HDCP_STATE_END = HDCP2_DP_STATE_END, 286 }; 287 288 /* hdcp1 executions and transitions */ 289 typedef enum mod_hdcp_status (*mod_hdcp_action)(struct mod_hdcp *hdcp); 290 uint8_t mod_hdcp_execute_and_set( 291 mod_hdcp_action func, uint8_t *flag, 292 enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str); 293 enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp, 294 struct mod_hdcp_event_context *event_ctx, 295 struct mod_hdcp_transition_input_hdcp1 *input); 296 enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp, 297 struct mod_hdcp_event_context *event_ctx, 298 struct mod_hdcp_transition_input_hdcp1 *input); 299 enum mod_hdcp_status mod_hdcp_hdcp1_transition(struct mod_hdcp *hdcp, 300 struct mod_hdcp_event_context *event_ctx, 301 struct mod_hdcp_transition_input_hdcp1 *input, 302 struct mod_hdcp_output *output); 303 enum mod_hdcp_status mod_hdcp_hdcp1_dp_transition(struct mod_hdcp *hdcp, 304 struct mod_hdcp_event_context *event_ctx, 305 struct mod_hdcp_transition_input_hdcp1 *input, 306 struct mod_hdcp_output *output); 307 308 /* hdcp2 executions and transitions */ 309 enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, 310 struct mod_hdcp_event_context *event_ctx, 311 struct mod_hdcp_transition_input_hdcp2 *input); 312 enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, 313 struct mod_hdcp_event_context *event_ctx, 314 struct mod_hdcp_transition_input_hdcp2 *input); 315 enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct mod_hdcp *hdcp, 316 struct mod_hdcp_event_context *event_ctx, 317 struct mod_hdcp_transition_input_hdcp2 *input, 318 struct mod_hdcp_output *output); 319 enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp, 320 struct mod_hdcp_event_context *event_ctx, 321 struct mod_hdcp_transition_input_hdcp2 *input, 322 struct mod_hdcp_output *output); 323 324 /* log functions */ 325 void mod_hdcp_dump_binary_message(uint8_t *msg, uint32_t msg_size, 326 uint8_t *buf, uint32_t buf_size); 327 void mod_hdcp_log_ddc_trace(struct mod_hdcp *hdcp); 328 /* TODO: add adjustment log */ 329 330 /* psp functions */ 331 enum mod_hdcp_status mod_hdcp_add_display_to_topology( 332 struct mod_hdcp *hdcp, struct mod_hdcp_display *display); 333 enum mod_hdcp_status mod_hdcp_remove_display_from_topology( 334 struct mod_hdcp *hdcp, uint8_t index); 335 enum mod_hdcp_status mod_hdcp_hdcp1_create_session(struct mod_hdcp *hdcp); 336 enum mod_hdcp_status mod_hdcp_hdcp1_destroy_session(struct mod_hdcp *hdcp); 337 enum mod_hdcp_status mod_hdcp_hdcp1_validate_rx(struct mod_hdcp *hdcp); 338 enum mod_hdcp_status mod_hdcp_hdcp1_enable_encryption(struct mod_hdcp *hdcp); 339 enum mod_hdcp_status mod_hdcp_hdcp1_validate_ksvlist_vp(struct mod_hdcp *hdcp); 340 enum mod_hdcp_status mod_hdcp_hdcp1_enable_dp_stream_encryption( 341 struct mod_hdcp *hdcp); 342 enum mod_hdcp_status mod_hdcp_hdcp1_link_maintenance(struct mod_hdcp *hdcp); 343 enum mod_hdcp_status mod_hdcp_hdcp2_create_session(struct mod_hdcp *hdcp); 344 enum mod_hdcp_status mod_hdcp_hdcp2_destroy_session(struct mod_hdcp *hdcp); 345 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_ake_init(struct mod_hdcp *hdcp); 346 enum mod_hdcp_status mod_hdcp_hdcp2_validate_ake_cert(struct mod_hdcp *hdcp); 347 enum mod_hdcp_status mod_hdcp_hdcp2_validate_h_prime(struct mod_hdcp *hdcp); 348 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_lc_init(struct mod_hdcp *hdcp); 349 enum mod_hdcp_status mod_hdcp_hdcp2_validate_l_prime(struct mod_hdcp *hdcp); 350 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_eks(struct mod_hdcp *hdcp); 351 enum mod_hdcp_status mod_hdcp_hdcp2_enable_encryption(struct mod_hdcp *hdcp); 352 enum mod_hdcp_status mod_hdcp_hdcp2_validate_rx_id_list(struct mod_hdcp *hdcp); 353 enum mod_hdcp_status mod_hdcp_hdcp2_enable_dp_stream_encryption( 354 struct mod_hdcp *hdcp); 355 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_stream_management( 356 struct mod_hdcp *hdcp); 357 enum mod_hdcp_status mod_hdcp_hdcp2_validate_stream_ready( 358 struct mod_hdcp *hdcp); 359 360 /* ddc functions */ 361 enum mod_hdcp_status mod_hdcp_read_bksv(struct mod_hdcp *hdcp); 362 enum mod_hdcp_status mod_hdcp_read_bcaps(struct mod_hdcp *hdcp); 363 enum mod_hdcp_status mod_hdcp_read_bstatus(struct mod_hdcp *hdcp); 364 enum mod_hdcp_status mod_hdcp_read_r0p(struct mod_hdcp *hdcp); 365 enum mod_hdcp_status mod_hdcp_read_ksvlist(struct mod_hdcp *hdcp); 366 enum mod_hdcp_status mod_hdcp_read_vp(struct mod_hdcp *hdcp); 367 enum mod_hdcp_status mod_hdcp_read_binfo(struct mod_hdcp *hdcp); 368 enum mod_hdcp_status mod_hdcp_write_aksv(struct mod_hdcp *hdcp); 369 enum mod_hdcp_status mod_hdcp_write_ainfo(struct mod_hdcp *hdcp); 370 enum mod_hdcp_status mod_hdcp_write_an(struct mod_hdcp *hdcp); 371 enum mod_hdcp_status mod_hdcp_read_hdcp2version(struct mod_hdcp *hdcp); 372 enum mod_hdcp_status mod_hdcp_read_rxcaps(struct mod_hdcp *hdcp); 373 enum mod_hdcp_status mod_hdcp_read_rxstatus(struct mod_hdcp *hdcp); 374 enum mod_hdcp_status mod_hdcp_read_ake_cert(struct mod_hdcp *hdcp); 375 enum mod_hdcp_status mod_hdcp_read_h_prime(struct mod_hdcp *hdcp); 376 enum mod_hdcp_status mod_hdcp_read_pairing_info(struct mod_hdcp *hdcp); 377 enum mod_hdcp_status mod_hdcp_read_l_prime(struct mod_hdcp *hdcp); 378 enum mod_hdcp_status mod_hdcp_read_rx_id_list(struct mod_hdcp *hdcp); 379 enum mod_hdcp_status mod_hdcp_read_stream_ready(struct mod_hdcp *hdcp); 380 enum mod_hdcp_status mod_hdcp_write_ake_init(struct mod_hdcp *hdcp); 381 enum mod_hdcp_status mod_hdcp_write_no_stored_km(struct mod_hdcp *hdcp); 382 enum mod_hdcp_status mod_hdcp_write_stored_km(struct mod_hdcp *hdcp); 383 enum mod_hdcp_status mod_hdcp_write_lc_init(struct mod_hdcp *hdcp); 384 enum mod_hdcp_status mod_hdcp_write_eks(struct mod_hdcp *hdcp); 385 enum mod_hdcp_status mod_hdcp_write_repeater_auth_ack(struct mod_hdcp *hdcp); 386 enum mod_hdcp_status mod_hdcp_write_stream_manage(struct mod_hdcp *hdcp); 387 enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp); 388 enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp); 389 390 /* hdcp version helpers */ 391 static inline uint8_t is_dp_hdcp(struct mod_hdcp *hdcp) 392 { 393 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP); 394 } 395 396 static inline uint8_t is_dp_mst_hdcp(struct mod_hdcp *hdcp) 397 { 398 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP && 399 hdcp->connection.link.dp.mst_enabled); 400 } 401 402 static inline uint8_t is_hdmi_dvi_sl_hdcp(struct mod_hdcp *hdcp) 403 { 404 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DEFAULT); 405 } 406 407 /* hdcp state helpers */ 408 static inline uint8_t current_state(struct mod_hdcp *hdcp) 409 { 410 return hdcp->state.id; 411 } 412 413 static inline void set_state_id(struct mod_hdcp *hdcp, 414 struct mod_hdcp_output *output, uint8_t id) 415 { 416 memset(&hdcp->state, 0, sizeof(hdcp->state)); 417 hdcp->state.id = id; 418 /* callback timer should be reset per state */ 419 output->callback_stop = 1; 420 output->watchdog_timer_stop = 1; 421 HDCP_NEXT_STATE_TRACE(hdcp, id, output); 422 } 423 424 static inline uint8_t is_in_hdcp1_states(struct mod_hdcp *hdcp) 425 { 426 return (current_state(hdcp) > HDCP1_STATE_START && 427 current_state(hdcp) <= HDCP1_STATE_END); 428 } 429 430 static inline uint8_t is_in_hdcp1_dp_states(struct mod_hdcp *hdcp) 431 { 432 return (current_state(hdcp) > HDCP1_DP_STATE_START && 433 current_state(hdcp) <= HDCP1_DP_STATE_END); 434 } 435 436 static inline uint8_t is_in_hdcp2_states(struct mod_hdcp *hdcp) 437 { 438 return (current_state(hdcp) > HDCP2_STATE_START && 439 current_state(hdcp) <= HDCP2_STATE_END); 440 } 441 442 static inline uint8_t is_in_hdcp2_dp_states(struct mod_hdcp *hdcp) 443 { 444 return (current_state(hdcp) > HDCP2_DP_STATE_START && 445 current_state(hdcp) <= HDCP2_DP_STATE_END); 446 } 447 448 static inline uint8_t is_hdcp1(struct mod_hdcp *hdcp) 449 { 450 return (is_in_hdcp1_states(hdcp) || is_in_hdcp1_dp_states(hdcp)); 451 } 452 453 static inline uint8_t is_hdcp2(struct mod_hdcp *hdcp) 454 { 455 return (is_in_hdcp2_states(hdcp) || is_in_hdcp2_dp_states(hdcp)); 456 } 457 458 static inline uint8_t is_in_cp_not_desired_state(struct mod_hdcp *hdcp) 459 { 460 return current_state(hdcp) == HDCP_CP_NOT_DESIRED; 461 } 462 463 static inline uint8_t is_in_initialized_state(struct mod_hdcp *hdcp) 464 { 465 return current_state(hdcp) == HDCP_INITIALIZED; 466 } 467 468 /* transition operation helpers */ 469 static inline void increment_stay_counter(struct mod_hdcp *hdcp) 470 { 471 hdcp->state.stay_count++; 472 } 473 474 static inline void fail_and_restart_in_ms(uint16_t time, 475 enum mod_hdcp_status *status, 476 struct mod_hdcp_output *output) 477 { 478 output->callback_needed = 1; 479 output->callback_delay = time; 480 output->watchdog_timer_needed = 0; 481 output->watchdog_timer_delay = 0; 482 *status = MOD_HDCP_STATUS_RESET_NEEDED; 483 } 484 485 static inline void callback_in_ms(uint16_t time, struct mod_hdcp_output *output) 486 { 487 output->callback_needed = 1; 488 output->callback_delay = time; 489 } 490 491 static inline void set_watchdog_in_ms(struct mod_hdcp *hdcp, uint16_t time, 492 struct mod_hdcp_output *output) 493 { 494 output->watchdog_timer_needed = 1; 495 output->watchdog_timer_delay = time; 496 } 497 498 static inline void set_auth_complete(struct mod_hdcp *hdcp, 499 struct mod_hdcp_output *output) 500 { 501 output->auth_complete = 1; 502 mod_hdcp_log_ddc_trace(hdcp); 503 } 504 505 /* connection topology helpers */ 506 static inline uint8_t is_display_active(struct mod_hdcp_display *display) 507 { 508 return display->state >= MOD_HDCP_DISPLAY_ACTIVE; 509 } 510 511 static inline uint8_t is_display_encryption_enabled(struct mod_hdcp_display *display) 512 { 513 return display->state >= MOD_HDCP_DISPLAY_ENCRYPTION_ENABLED; 514 } 515 516 static inline uint8_t get_active_display_count(struct mod_hdcp *hdcp) 517 { 518 uint8_t active_count = 0; 519 uint8_t i; 520 521 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 522 if (is_display_active(&hdcp->displays[i])) 523 active_count++; 524 return active_count; 525 } 526 527 static inline struct mod_hdcp_display *get_first_active_display( 528 struct mod_hdcp *hdcp) 529 { 530 uint8_t i; 531 struct mod_hdcp_display *display = NULL; 532 533 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 534 if (is_display_active(&hdcp->displays[i])) { 535 display = &hdcp->displays[i]; 536 break; 537 } 538 return display; 539 } 540 541 static inline struct mod_hdcp_display *get_active_display_at_index( 542 struct mod_hdcp *hdcp, uint8_t index) 543 { 544 uint8_t i; 545 struct mod_hdcp_display *display = NULL; 546 547 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 548 if (hdcp->displays[i].index == index && 549 is_display_active(&hdcp->displays[i])) { 550 display = &hdcp->displays[i]; 551 break; 552 } 553 return display; 554 } 555 556 static inline struct mod_hdcp_display *get_empty_display_container( 557 struct mod_hdcp *hdcp) 558 { 559 uint8_t i; 560 struct mod_hdcp_display *display = NULL; 561 562 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 563 if (!is_display_active(&hdcp->displays[i])) { 564 display = &hdcp->displays[i]; 565 break; 566 } 567 return display; 568 } 569 570 static inline void reset_retry_counts(struct mod_hdcp *hdcp) 571 { 572 hdcp->connection.hdcp1_retry_count = 0; 573 hdcp->connection.hdcp2_retry_count = 0; 574 } 575 576 #endif /* HDCP_H_ */ 577