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/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 add_topology; 45 uint8_t create_session; 46 uint8_t an_write; 47 uint8_t aksv_write; 48 uint8_t ainfo_write; 49 uint8_t bcaps_read; 50 uint8_t r0p_read; 51 uint8_t rx_validation; 52 uint8_t encryption; 53 uint8_t link_maintenance; 54 uint8_t ready_check; 55 uint8_t bstatus_read; 56 uint8_t max_cascade_check; 57 uint8_t max_devs_check; 58 uint8_t device_count_check; 59 uint8_t ksvlist_read; 60 uint8_t vp_read; 61 uint8_t ksvlist_vp_validation; 62 63 uint8_t hdcp_capable_dp; 64 uint8_t binfo_read_dp; 65 uint8_t r0p_available_dp; 66 uint8_t link_integrity_check; 67 uint8_t reauth_request_check; 68 uint8_t stream_encryption_dp; 69 }; 70 71 struct mod_hdcp_transition_input_hdcp2 { 72 uint8_t hdcp2version_read; 73 uint8_t hdcp2_capable_check; 74 uint8_t add_topology; 75 uint8_t create_session; 76 uint8_t ake_init_prepare; 77 uint8_t ake_init_write; 78 uint8_t rxstatus_read; 79 uint8_t ake_cert_available; 80 uint8_t ake_cert_read; 81 uint8_t ake_cert_validation; 82 uint8_t stored_km_write; 83 uint8_t no_stored_km_write; 84 uint8_t h_prime_available; 85 uint8_t h_prime_read; 86 uint8_t pairing_available; 87 uint8_t pairing_info_read; 88 uint8_t h_prime_validation; 89 uint8_t lc_init_prepare; 90 uint8_t lc_init_write; 91 uint8_t l_prime_available_poll; 92 uint8_t l_prime_read; 93 uint8_t l_prime_validation; 94 uint8_t eks_prepare; 95 uint8_t eks_write; 96 uint8_t enable_encryption; 97 uint8_t reauth_request_check; 98 uint8_t rx_id_list_read; 99 uint8_t device_count_check; 100 uint8_t rx_id_list_validation; 101 uint8_t repeater_auth_ack_write; 102 uint8_t prepare_stream_manage; 103 uint8_t stream_manage_write; 104 uint8_t stream_ready_available; 105 uint8_t stream_ready_read; 106 uint8_t stream_ready_validation; 107 108 uint8_t rx_caps_read_dp; 109 uint8_t content_stream_type_write; 110 uint8_t link_integrity_check_dp; 111 uint8_t stream_encryption_dp; 112 }; 113 114 union mod_hdcp_transition_input { 115 struct mod_hdcp_transition_input_hdcp1 hdcp1; 116 struct mod_hdcp_transition_input_hdcp2 hdcp2; 117 }; 118 119 struct mod_hdcp_message_hdcp1 { 120 uint8_t an[8]; 121 uint8_t aksv[5]; 122 uint8_t ainfo; 123 uint8_t bksv[5]; 124 uint16_t r0p; 125 uint8_t bcaps; 126 uint16_t bstatus; 127 uint8_t ksvlist[635]; 128 uint16_t ksvlist_size; 129 uint8_t vp[20]; 130 131 uint16_t binfo_dp; 132 }; 133 134 struct mod_hdcp_message_hdcp2 { 135 uint8_t hdcp2version_hdmi; 136 uint8_t rxcaps_dp[3]; 137 uint8_t rxstatus[2]; 138 139 uint8_t ake_init[12]; 140 uint8_t ake_cert[534]; 141 uint8_t ake_no_stored_km[129]; 142 uint8_t ake_stored_km[33]; 143 uint8_t ake_h_prime[33]; 144 uint8_t ake_pairing_info[17]; 145 uint8_t lc_init[9]; 146 uint8_t lc_l_prime[33]; 147 uint8_t ske_eks[25]; 148 uint8_t rx_id_list[177]; // 22 + 5 * 31 149 uint16_t rx_id_list_size; 150 uint8_t repeater_auth_ack[17]; 151 uint8_t repeater_auth_stream_manage[68]; // 6 + 2 * 31 152 uint16_t stream_manage_size; 153 uint8_t repeater_auth_stream_ready[33]; 154 uint8_t rxstatus_dp; 155 uint8_t content_stream_type_dp[2]; 156 }; 157 158 union mod_hdcp_message { 159 struct mod_hdcp_message_hdcp1 hdcp1; 160 struct mod_hdcp_message_hdcp2 hdcp2; 161 }; 162 163 struct mod_hdcp_auth_counters { 164 uint8_t stream_management_retry_count; 165 }; 166 167 /* contains values per connection */ 168 struct mod_hdcp_connection { 169 struct mod_hdcp_link link; 170 struct mod_hdcp_display displays[MAX_NUM_OF_DISPLAYS]; 171 uint8_t is_repeater; 172 uint8_t is_km_stored; 173 uint8_t is_hdcp2_revoked; 174 struct mod_hdcp_trace trace; 175 uint8_t hdcp1_retry_count; 176 uint8_t hdcp2_retry_count; 177 }; 178 179 /* contains values per authentication cycle */ 180 struct mod_hdcp_authentication { 181 uint32_t id; 182 union mod_hdcp_message msg; 183 union mod_hdcp_transition_input trans_input; 184 struct mod_hdcp_auth_counters count; 185 }; 186 187 /* contains values per state change */ 188 struct mod_hdcp_state { 189 uint8_t id; 190 uint32_t stay_count; 191 }; 192 193 /* per event in a state */ 194 struct mod_hdcp_event_context { 195 enum mod_hdcp_event event; 196 uint8_t rx_id_list_ready; 197 uint8_t unexpected_event; 198 }; 199 200 struct mod_hdcp { 201 /* per link */ 202 struct mod_hdcp_config config; 203 /* per connection */ 204 struct mod_hdcp_connection connection; 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 /* TODO: add adjustment log */ 328 329 /* psp functions */ 330 enum mod_hdcp_status mod_hdcp_add_display_topology( 331 struct mod_hdcp *hdcp); 332 enum mod_hdcp_status mod_hdcp_remove_display_topology( 333 struct mod_hdcp *hdcp); 334 enum mod_hdcp_status mod_hdcp_hdcp1_create_session(struct mod_hdcp *hdcp); 335 enum mod_hdcp_status mod_hdcp_hdcp1_destroy_session(struct mod_hdcp *hdcp); 336 enum mod_hdcp_status mod_hdcp_hdcp1_validate_rx(struct mod_hdcp *hdcp); 337 enum mod_hdcp_status mod_hdcp_hdcp1_enable_encryption(struct mod_hdcp *hdcp); 338 enum mod_hdcp_status mod_hdcp_hdcp1_validate_ksvlist_vp(struct mod_hdcp *hdcp); 339 enum mod_hdcp_status mod_hdcp_hdcp1_enable_dp_stream_encryption( 340 struct mod_hdcp *hdcp); 341 enum mod_hdcp_status mod_hdcp_hdcp1_link_maintenance(struct mod_hdcp *hdcp); 342 enum mod_hdcp_status mod_hdcp_hdcp1_get_link_encryption_status(struct mod_hdcp *hdcp, 343 enum mod_hdcp_encryption_status *encryption_status); 344 enum mod_hdcp_status mod_hdcp_hdcp2_create_session(struct mod_hdcp *hdcp); 345 enum mod_hdcp_status mod_hdcp_hdcp2_destroy_session(struct mod_hdcp *hdcp); 346 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_ake_init(struct mod_hdcp *hdcp); 347 enum mod_hdcp_status mod_hdcp_hdcp2_validate_ake_cert(struct mod_hdcp *hdcp); 348 enum mod_hdcp_status mod_hdcp_hdcp2_validate_h_prime(struct mod_hdcp *hdcp); 349 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_lc_init(struct mod_hdcp *hdcp); 350 enum mod_hdcp_status mod_hdcp_hdcp2_validate_l_prime(struct mod_hdcp *hdcp); 351 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_eks(struct mod_hdcp *hdcp); 352 enum mod_hdcp_status mod_hdcp_hdcp2_enable_encryption(struct mod_hdcp *hdcp); 353 enum mod_hdcp_status mod_hdcp_hdcp2_validate_rx_id_list(struct mod_hdcp *hdcp); 354 enum mod_hdcp_status mod_hdcp_hdcp2_enable_dp_stream_encryption( 355 struct mod_hdcp *hdcp); 356 enum mod_hdcp_status mod_hdcp_hdcp2_prepare_stream_management( 357 struct mod_hdcp *hdcp); 358 enum mod_hdcp_status mod_hdcp_hdcp2_validate_stream_ready( 359 struct mod_hdcp *hdcp); 360 enum mod_hdcp_status mod_hdcp_hdcp2_get_link_encryption_status(struct mod_hdcp *hdcp, 361 enum mod_hdcp_encryption_status *encryption_status); 362 363 /* ddc functions */ 364 enum mod_hdcp_status mod_hdcp_read_bksv(struct mod_hdcp *hdcp); 365 enum mod_hdcp_status mod_hdcp_read_bcaps(struct mod_hdcp *hdcp); 366 enum mod_hdcp_status mod_hdcp_read_bstatus(struct mod_hdcp *hdcp); 367 enum mod_hdcp_status mod_hdcp_read_r0p(struct mod_hdcp *hdcp); 368 enum mod_hdcp_status mod_hdcp_read_ksvlist(struct mod_hdcp *hdcp); 369 enum mod_hdcp_status mod_hdcp_read_vp(struct mod_hdcp *hdcp); 370 enum mod_hdcp_status mod_hdcp_read_binfo(struct mod_hdcp *hdcp); 371 enum mod_hdcp_status mod_hdcp_write_aksv(struct mod_hdcp *hdcp); 372 enum mod_hdcp_status mod_hdcp_write_ainfo(struct mod_hdcp *hdcp); 373 enum mod_hdcp_status mod_hdcp_write_an(struct mod_hdcp *hdcp); 374 enum mod_hdcp_status mod_hdcp_read_hdcp2version(struct mod_hdcp *hdcp); 375 enum mod_hdcp_status mod_hdcp_read_rxcaps(struct mod_hdcp *hdcp); 376 enum mod_hdcp_status mod_hdcp_read_rxstatus(struct mod_hdcp *hdcp); 377 enum mod_hdcp_status mod_hdcp_read_ake_cert(struct mod_hdcp *hdcp); 378 enum mod_hdcp_status mod_hdcp_read_h_prime(struct mod_hdcp *hdcp); 379 enum mod_hdcp_status mod_hdcp_read_pairing_info(struct mod_hdcp *hdcp); 380 enum mod_hdcp_status mod_hdcp_read_l_prime(struct mod_hdcp *hdcp); 381 enum mod_hdcp_status mod_hdcp_read_rx_id_list(struct mod_hdcp *hdcp); 382 enum mod_hdcp_status mod_hdcp_read_stream_ready(struct mod_hdcp *hdcp); 383 enum mod_hdcp_status mod_hdcp_write_ake_init(struct mod_hdcp *hdcp); 384 enum mod_hdcp_status mod_hdcp_write_no_stored_km(struct mod_hdcp *hdcp); 385 enum mod_hdcp_status mod_hdcp_write_stored_km(struct mod_hdcp *hdcp); 386 enum mod_hdcp_status mod_hdcp_write_lc_init(struct mod_hdcp *hdcp); 387 enum mod_hdcp_status mod_hdcp_write_eks(struct mod_hdcp *hdcp); 388 enum mod_hdcp_status mod_hdcp_write_repeater_auth_ack(struct mod_hdcp *hdcp); 389 enum mod_hdcp_status mod_hdcp_write_stream_manage(struct mod_hdcp *hdcp); 390 enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp); 391 392 /* hdcp version helpers */ 393 static inline uint8_t is_dp_hdcp(struct mod_hdcp *hdcp) 394 { 395 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP || 396 hdcp->connection.link.mode == MOD_HDCP_MODE_DP_MST); 397 } 398 399 static inline uint8_t is_dp_mst_hdcp(struct mod_hdcp *hdcp) 400 { 401 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DP_MST); 402 } 403 404 static inline uint8_t is_hdmi_dvi_sl_hdcp(struct mod_hdcp *hdcp) 405 { 406 return (hdcp->connection.link.mode == MOD_HDCP_MODE_DEFAULT); 407 } 408 409 /* hdcp state helpers */ 410 static inline uint8_t current_state(struct mod_hdcp *hdcp) 411 { 412 return hdcp->state.id; 413 } 414 415 static inline void set_state_id(struct mod_hdcp *hdcp, 416 struct mod_hdcp_output *output, uint8_t id) 417 { 418 memset(&hdcp->state, 0, sizeof(hdcp->state)); 419 hdcp->state.id = id; 420 /* callback timer should be reset per state */ 421 output->callback_stop = 1; 422 output->watchdog_timer_stop = 1; 423 HDCP_NEXT_STATE_TRACE(hdcp, id, output); 424 } 425 426 static inline uint8_t is_in_hdcp1_states(struct mod_hdcp *hdcp) 427 { 428 return (current_state(hdcp) > HDCP1_STATE_START && 429 current_state(hdcp) <= HDCP1_STATE_END); 430 } 431 432 static inline uint8_t is_in_hdcp1_dp_states(struct mod_hdcp *hdcp) 433 { 434 return (current_state(hdcp) > HDCP1_DP_STATE_START && 435 current_state(hdcp) <= HDCP1_DP_STATE_END); 436 } 437 438 static inline uint8_t is_in_hdcp2_states(struct mod_hdcp *hdcp) 439 { 440 return (current_state(hdcp) > HDCP2_STATE_START && 441 current_state(hdcp) <= HDCP2_STATE_END); 442 } 443 444 static inline uint8_t is_in_hdcp2_dp_states(struct mod_hdcp *hdcp) 445 { 446 return (current_state(hdcp) > HDCP2_DP_STATE_START && 447 current_state(hdcp) <= HDCP2_DP_STATE_END); 448 } 449 450 static inline uint8_t is_hdcp1(struct mod_hdcp *hdcp) 451 { 452 return (is_in_hdcp1_states(hdcp) || is_in_hdcp1_dp_states(hdcp)); 453 } 454 455 static inline uint8_t is_hdcp2(struct mod_hdcp *hdcp) 456 { 457 return (is_in_hdcp2_states(hdcp) || is_in_hdcp2_dp_states(hdcp)); 458 } 459 460 static inline uint8_t is_in_cp_not_desired_state(struct mod_hdcp *hdcp) 461 { 462 return current_state(hdcp) == HDCP_CP_NOT_DESIRED; 463 } 464 465 static inline uint8_t is_in_initialized_state(struct mod_hdcp *hdcp) 466 { 467 return current_state(hdcp) == HDCP_INITIALIZED; 468 } 469 470 /* transition operation helpers */ 471 static inline void increment_stay_counter(struct mod_hdcp *hdcp) 472 { 473 hdcp->state.stay_count++; 474 } 475 476 static inline void fail_and_restart_in_ms(uint16_t time, 477 enum mod_hdcp_status *status, 478 struct mod_hdcp_output *output) 479 { 480 output->callback_needed = 1; 481 output->callback_delay = time; 482 output->watchdog_timer_needed = 0; 483 output->watchdog_timer_delay = 0; 484 *status = MOD_HDCP_STATUS_RESET_NEEDED; 485 } 486 487 static inline void callback_in_ms(uint16_t time, struct mod_hdcp_output *output) 488 { 489 output->callback_needed = 1; 490 output->callback_delay = time; 491 } 492 493 static inline void set_watchdog_in_ms(struct mod_hdcp *hdcp, uint16_t time, 494 struct mod_hdcp_output *output) 495 { 496 output->watchdog_timer_needed = 1; 497 output->watchdog_timer_delay = time; 498 } 499 500 /* connection topology helpers */ 501 static inline uint8_t is_display_active(struct mod_hdcp_display *display) 502 { 503 return display->state >= MOD_HDCP_DISPLAY_ACTIVE; 504 } 505 506 static inline uint8_t is_display_added(struct mod_hdcp_display *display) 507 { 508 return display->state >= MOD_HDCP_DISPLAY_ACTIVE_AND_ADDED; 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 added_count = 0; 519 uint8_t i; 520 521 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 522 if (is_display_active(&hdcp->connection.displays[i])) 523 added_count++; 524 return added_count; 525 } 526 527 static inline uint8_t get_added_display_count(struct mod_hdcp *hdcp) 528 { 529 uint8_t added_count = 0; 530 uint8_t i; 531 532 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 533 if (is_display_added(&hdcp->connection.displays[i])) 534 added_count++; 535 return added_count; 536 } 537 538 static inline struct mod_hdcp_display *get_first_added_display( 539 struct mod_hdcp *hdcp) 540 { 541 uint8_t i; 542 struct mod_hdcp_display *display = NULL; 543 544 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 545 if (is_display_added(&hdcp->connection.displays[i])) { 546 display = &hdcp->connection.displays[i]; 547 break; 548 } 549 return display; 550 } 551 552 static inline struct mod_hdcp_display *get_active_display_at_index( 553 struct mod_hdcp *hdcp, uint8_t index) 554 { 555 uint8_t i; 556 struct mod_hdcp_display *display = NULL; 557 558 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 559 if (hdcp->connection.displays[i].index == index && 560 is_display_active(&hdcp->connection.displays[i])) { 561 display = &hdcp->connection.displays[i]; 562 break; 563 } 564 return display; 565 } 566 567 static inline struct mod_hdcp_display *get_empty_display_container( 568 struct mod_hdcp *hdcp) 569 { 570 uint8_t i; 571 struct mod_hdcp_display *display = NULL; 572 573 for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) 574 if (!is_display_active(&hdcp->connection.displays[i])) { 575 display = &hdcp->connection.displays[i]; 576 break; 577 } 578 return display; 579 } 580 581 static inline void reset_retry_counts(struct mod_hdcp *hdcp) 582 { 583 hdcp->connection.hdcp1_retry_count = 0; 584 hdcp->connection.hdcp2_retry_count = 0; 585 } 586 587 #endif /* HDCP_H_ */ 588