1 /* 2 * Copyright 2018 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 <linux/delay.h> 27 28 #include "hdcp.h" 29 30 static inline uint16_t get_hdmi_rxstatus_msg_size(const uint8_t rxstatus[2]) 31 { 32 return HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(rxstatus[1]) << 8 | rxstatus[0]; 33 } 34 35 static inline enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp) 36 { 37 uint8_t is_ready = 0; 38 39 if (is_dp_hdcp(hdcp)) 40 is_ready = HDCP_2_2_DP_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 1 : 0; 41 else 42 is_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus[1]) && 43 get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus) != 0) ? 1 : 0; 44 return is_ready ? MOD_HDCP_STATUS_SUCCESS : 45 MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; 46 } 47 48 static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp) 49 { 50 enum mod_hdcp_status status; 51 52 if (is_dp_hdcp(hdcp)) 53 status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) && 54 HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ? 55 MOD_HDCP_STATUS_SUCCESS : 56 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE; 57 else 58 status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & HDCP_2_2_HDMI_SUPPORT_MASK) ? 59 MOD_HDCP_STATUS_SUCCESS : 60 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE; 61 return status; 62 } 63 64 static inline enum mod_hdcp_status check_reauthentication_request( 65 struct mod_hdcp *hdcp) 66 { 67 uint8_t ret = 0; 68 69 if (is_dp_hdcp(hdcp)) 70 ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 71 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST : 72 MOD_HDCP_STATUS_SUCCESS; 73 else 74 ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[1]) ? 75 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST : 76 MOD_HDCP_STATUS_SUCCESS; 77 return ret; 78 } 79 80 static inline enum mod_hdcp_status check_link_integrity_failure_dp( 81 struct mod_hdcp *hdcp) 82 { 83 return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 84 MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE : 85 MOD_HDCP_STATUS_SUCCESS; 86 } 87 88 static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp) 89 { 90 enum mod_hdcp_status status; 91 92 if (is_dp_hdcp(hdcp)) { 93 status = MOD_HDCP_STATUS_SUCCESS; 94 } else { 95 status = mod_hdcp_read_rxstatus(hdcp); 96 if (status == MOD_HDCP_STATUS_SUCCESS) { 97 const uint16_t size = get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 98 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ? 99 MOD_HDCP_STATUS_SUCCESS : 100 MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING; 101 } 102 } 103 return status; 104 } 105 106 static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp) 107 { 108 enum mod_hdcp_status status; 109 110 status = mod_hdcp_read_rxstatus(hdcp); 111 if (status != MOD_HDCP_STATUS_SUCCESS) 112 goto out; 113 114 if (is_dp_hdcp(hdcp)) { 115 status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 116 MOD_HDCP_STATUS_SUCCESS : 117 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING; 118 } else { 119 const uint16_t size = get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 120 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ? 121 MOD_HDCP_STATUS_SUCCESS : 122 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING; 123 } 124 out: 125 return status; 126 } 127 128 static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp) 129 { 130 enum mod_hdcp_status status; 131 132 status = mod_hdcp_read_rxstatus(hdcp); 133 if (status != MOD_HDCP_STATUS_SUCCESS) 134 goto out; 135 136 if (is_dp_hdcp(hdcp)) { 137 status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 138 MOD_HDCP_STATUS_SUCCESS : 139 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING; 140 } else { 141 const uint16_t size = get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 142 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ? 143 MOD_HDCP_STATUS_SUCCESS : 144 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING; 145 } 146 out: 147 return status; 148 } 149 150 static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp) 151 { 152 enum mod_hdcp_status status = MOD_HDCP_STATUS_FAILURE; 153 uint16_t max_wait = 20; // units of ms 154 uint16_t num_polls = 5; 155 uint16_t wait_time = max_wait / num_polls; 156 157 if (is_dp_hdcp(hdcp)) 158 status = MOD_HDCP_STATUS_INVALID_OPERATION; 159 else 160 for (; num_polls; num_polls--) { 161 msleep(wait_time); 162 163 status = mod_hdcp_read_rxstatus(hdcp); 164 if (status != MOD_HDCP_STATUS_SUCCESS) 165 break; 166 167 const uint16_t size = get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 168 status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ? 169 MOD_HDCP_STATUS_SUCCESS : 170 MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING; 171 if (status == MOD_HDCP_STATUS_SUCCESS) 172 break; 173 } 174 return status; 175 } 176 177 static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp) 178 { 179 enum mod_hdcp_status status; 180 181 if (is_dp_hdcp(hdcp)) { 182 status = MOD_HDCP_STATUS_INVALID_OPERATION; 183 } else { 184 status = mod_hdcp_read_rxstatus(hdcp); 185 if (status != MOD_HDCP_STATUS_SUCCESS) 186 goto out; 187 const uint16_t size = get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 188 status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ? 189 MOD_HDCP_STATUS_SUCCESS : 190 MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING; 191 } 192 out: 193 return status; 194 } 195 196 static inline uint8_t get_device_count(struct mod_hdcp *hdcp) 197 { 198 return HDCP_2_2_DEV_COUNT_LO(hdcp->auth.msg.hdcp2.rx_id_list[2]) + 199 (HDCP_2_2_DEV_COUNT_HI(hdcp->auth.msg.hdcp2.rx_id_list[1]) << 4); 200 } 201 202 static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp) 203 { 204 /* Avoid device count == 0 to do authentication */ 205 if (get_device_count(hdcp) == 0) 206 return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE; 207 208 /* Some MST display may choose to report the internal panel as an HDCP RX. */ 209 /* To update this condition with 1(because the immediate repeater's internal */ 210 /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */ 211 /* Device count must be greater than or equal to tracked hdcp displays. */ 212 return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ? 213 MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE : 214 MOD_HDCP_STATUS_SUCCESS; 215 } 216 217 static uint8_t process_rxstatus(struct mod_hdcp *hdcp, 218 struct mod_hdcp_event_context *event_ctx, 219 struct mod_hdcp_transition_input_hdcp2 *input, 220 enum mod_hdcp_status *status) 221 { 222 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus, 223 &input->rxstatus_read, status, 224 hdcp, "rxstatus_read")) 225 goto out; 226 if (!mod_hdcp_execute_and_set(check_reauthentication_request, 227 &input->reauth_request_check, status, 228 hdcp, "reauth_request_check")) 229 goto out; 230 if (is_dp_hdcp(hdcp)) { 231 if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp, 232 &input->link_integrity_check_dp, status, 233 hdcp, "link_integrity_check_dp")) 234 goto out; 235 } 236 if (hdcp->connection.is_repeater) 237 if (check_receiver_id_list_ready(hdcp) == 238 MOD_HDCP_STATUS_SUCCESS) { 239 HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready"); 240 event_ctx->rx_id_list_ready = 1; 241 if (is_dp_hdcp(hdcp)) 242 hdcp->auth.msg.hdcp2.rx_id_list_size = 243 sizeof(hdcp->auth.msg.hdcp2.rx_id_list); 244 else 245 hdcp->auth.msg.hdcp2.rx_id_list_size = 246 get_hdmi_rxstatus_msg_size(hdcp->auth.msg.hdcp2.rxstatus); 247 } 248 out: 249 return (*status == MOD_HDCP_STATUS_SUCCESS); 250 } 251 252 static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp, 253 struct mod_hdcp_event_context *event_ctx, 254 struct mod_hdcp_transition_input_hdcp2 *input) 255 { 256 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 257 258 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 259 event_ctx->unexpected_event = 1; 260 goto out; 261 } 262 263 if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version, 264 &input->hdcp2version_read, &status, 265 hdcp, "hdcp2version_read")) 266 goto out; 267 if (!mod_hdcp_execute_and_set(check_hdcp2_capable, 268 &input->hdcp2_capable_check, &status, 269 hdcp, "hdcp2_capable")) 270 goto out; 271 out: 272 return status; 273 } 274 275 static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp, 276 struct mod_hdcp_event_context *event_ctx, 277 struct mod_hdcp_transition_input_hdcp2 *input) 278 { 279 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 280 281 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 282 event_ctx->unexpected_event = 1; 283 goto out; 284 } 285 286 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session, 287 &input->create_session, &status, 288 hdcp, "create_session")) 289 goto out; 290 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init, 291 &input->ake_init_prepare, &status, 292 hdcp, "ake_init_prepare")) 293 goto out; 294 if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init, 295 &input->ake_init_write, &status, 296 hdcp, "ake_init_write")) 297 goto out; 298 out: 299 return status; 300 } 301 302 static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp, 303 struct mod_hdcp_event_context *event_ctx, 304 struct mod_hdcp_transition_input_hdcp2 *input) 305 { 306 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 307 308 309 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 310 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 311 event_ctx->unexpected_event = 1; 312 goto out; 313 } 314 315 if (is_hdmi_dvi_sl_hdcp(hdcp)) 316 if (!mod_hdcp_execute_and_set(check_ake_cert_available, 317 &input->ake_cert_available, &status, 318 hdcp, "ake_cert_available")) 319 goto out; 320 if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert, 321 &input->ake_cert_read, &status, 322 hdcp, "ake_cert_read")) 323 goto out; 324 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert, 325 &input->ake_cert_validation, &status, 326 hdcp, "ake_cert_validation")) 327 goto out; 328 out: 329 return status; 330 } 331 332 static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp, 333 struct mod_hdcp_event_context *event_ctx, 334 struct mod_hdcp_transition_input_hdcp2 *input) 335 { 336 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 337 338 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 339 event_ctx->unexpected_event = 1; 340 goto out; 341 } 342 343 if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km, 344 &input->no_stored_km_write, &status, 345 hdcp, "no_stored_km_write")) 346 goto out; 347 out: 348 return status; 349 } 350 351 static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp, 352 struct mod_hdcp_event_context *event_ctx, 353 struct mod_hdcp_transition_input_hdcp2 *input) 354 { 355 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 356 357 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 358 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 359 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 360 event_ctx->unexpected_event = 1; 361 goto out; 362 } 363 364 if (!mod_hdcp_execute_and_set(check_h_prime_available, 365 &input->h_prime_available, &status, 366 hdcp, "h_prime_available")) 367 goto out; 368 369 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, 370 &input->h_prime_read, &status, 371 hdcp, "h_prime_read")) 372 goto out; 373 out: 374 return status; 375 } 376 377 static enum mod_hdcp_status read_pairing_info_and_validate_h_prime( 378 struct mod_hdcp *hdcp, 379 struct mod_hdcp_event_context *event_ctx, 380 struct mod_hdcp_transition_input_hdcp2 *input) 381 { 382 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 383 384 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 385 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 386 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 387 event_ctx->unexpected_event = 1; 388 goto out; 389 } 390 391 if (!mod_hdcp_execute_and_set(check_pairing_info_available, 392 &input->pairing_available, &status, 393 hdcp, "pairing_available")) 394 goto out; 395 if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info, 396 &input->pairing_info_read, &status, 397 hdcp, "pairing_info_read")) 398 goto out; 399 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, 400 &input->h_prime_validation, &status, 401 hdcp, "h_prime_validation")) 402 goto out; 403 out: 404 return status; 405 } 406 407 static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp, 408 struct mod_hdcp_event_context *event_ctx, 409 struct mod_hdcp_transition_input_hdcp2 *input) 410 { 411 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 412 413 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 414 event_ctx->unexpected_event = 1; 415 goto out; 416 } 417 418 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km, 419 &input->stored_km_write, &status, 420 hdcp, "stored_km_write")) 421 goto out; 422 out: 423 return status; 424 } 425 426 static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp, 427 struct mod_hdcp_event_context *event_ctx, 428 struct mod_hdcp_transition_input_hdcp2 *input) 429 { 430 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 431 432 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 433 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 434 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 435 event_ctx->unexpected_event = 1; 436 goto out; 437 } 438 439 if (!mod_hdcp_execute_and_set(check_h_prime_available, 440 &input->h_prime_available, &status, 441 hdcp, "h_prime_available")) 442 goto out; 443 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, 444 &input->h_prime_read, &status, 445 hdcp, "h_prime_read")) 446 goto out; 447 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, 448 &input->h_prime_validation, &status, 449 hdcp, "h_prime_validation")) 450 goto out; 451 out: 452 return status; 453 } 454 455 static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp, 456 struct mod_hdcp_event_context *event_ctx, 457 struct mod_hdcp_transition_input_hdcp2 *input) 458 { 459 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 460 461 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 462 event_ctx->unexpected_event = 1; 463 goto out; 464 } 465 466 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init, 467 &input->lc_init_prepare, &status, 468 hdcp, "lc_init_prepare")) 469 goto out; 470 if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init, 471 &input->lc_init_write, &status, 472 hdcp, "lc_init_write")) 473 goto out; 474 if (is_dp_hdcp(hdcp)) 475 msleep(16); 476 else 477 if (!mod_hdcp_execute_and_set(poll_l_prime_available, 478 &input->l_prime_available_poll, &status, 479 hdcp, "l_prime_available_poll")) 480 goto out; 481 if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime, 482 &input->l_prime_read, &status, 483 hdcp, "l_prime_read")) 484 goto out; 485 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime, 486 &input->l_prime_validation, &status, 487 hdcp, "l_prime_validation")) 488 goto out; 489 out: 490 return status; 491 } 492 493 static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp, 494 struct mod_hdcp_event_context *event_ctx, 495 struct mod_hdcp_transition_input_hdcp2 *input) 496 { 497 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 498 499 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 500 event_ctx->unexpected_event = 1; 501 goto out; 502 } 503 504 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks, 505 &input->eks_prepare, &status, 506 hdcp, "eks_prepare")) 507 goto out; 508 if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks, 509 &input->eks_write, &status, 510 hdcp, "eks_write")) 511 goto out; 512 out: 513 return status; 514 } 515 516 static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp, 517 struct mod_hdcp_event_context *event_ctx, 518 struct mod_hdcp_transition_input_hdcp2 *input) 519 { 520 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 521 522 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 523 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 524 event_ctx->unexpected_event = 1; 525 goto out; 526 } 527 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 528 process_rxstatus(hdcp, event_ctx, input, &status); 529 goto out; 530 } 531 532 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 533 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 534 goto out; 535 if (event_ctx->rx_id_list_ready) 536 goto out; 537 } 538 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption, 539 &input->enable_encryption, &status, 540 hdcp, "enable_encryption")) 541 goto out; 542 if (is_dp_mst_hdcp(hdcp)) { 543 if (!mod_hdcp_execute_and_set( 544 mod_hdcp_hdcp2_enable_dp_stream_encryption, 545 &input->stream_encryption_dp, &status, 546 hdcp, "stream_encryption_dp")) 547 goto out; 548 } 549 out: 550 return status; 551 } 552 553 static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp, 554 struct mod_hdcp_event_context *event_ctx, 555 struct mod_hdcp_transition_input_hdcp2 *input) 556 { 557 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 558 559 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 560 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 561 event_ctx->unexpected_event = 1; 562 goto out; 563 } 564 565 process_rxstatus(hdcp, event_ctx, input, &status); 566 out: 567 return status; 568 } 569 570 static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp, 571 struct mod_hdcp_event_context *event_ctx, 572 struct mod_hdcp_transition_input_hdcp2 *input) 573 { 574 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 575 576 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 577 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 578 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 579 event_ctx->unexpected_event = 1; 580 goto out; 581 } 582 583 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 584 goto out; 585 if (!event_ctx->rx_id_list_ready) { 586 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; 587 goto out; 588 } 589 out: 590 return status; 591 } 592 593 static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp, 594 struct mod_hdcp_event_context *event_ctx, 595 struct mod_hdcp_transition_input_hdcp2 *input) 596 { 597 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 598 599 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 600 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 601 event_ctx->unexpected_event = 1; 602 goto out; 603 } 604 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 605 process_rxstatus(hdcp, event_ctx, input, &status); 606 goto out; 607 } 608 609 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list, 610 &input->rx_id_list_read, 611 &status, hdcp, "receiver_id_list_read")) 612 goto out; 613 if (!mod_hdcp_execute_and_set(check_device_count, 614 &input->device_count_check, 615 &status, hdcp, "device_count_check")) 616 goto out; 617 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list, 618 &input->rx_id_list_validation, 619 &status, hdcp, "rx_id_list_validation")) 620 goto out; 621 if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack, 622 &input->repeater_auth_ack_write, 623 &status, hdcp, "repeater_auth_ack_write")) 624 goto out; 625 out: 626 return status; 627 } 628 629 static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp, 630 struct mod_hdcp_event_context *event_ctx, 631 struct mod_hdcp_transition_input_hdcp2 *input) 632 { 633 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 634 635 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 636 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 637 event_ctx->unexpected_event = 1; 638 goto out; 639 } 640 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 641 process_rxstatus(hdcp, event_ctx, input, &status); 642 goto out; 643 } 644 645 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 646 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 647 goto out; 648 if (event_ctx->rx_id_list_ready) 649 goto out; 650 } 651 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management, 652 &input->prepare_stream_manage, 653 &status, hdcp, "prepare_stream_manage")) 654 goto out; 655 656 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage, 657 &input->stream_manage_write, 658 &status, hdcp, "stream_manage_write")) 659 goto out; 660 out: 661 return status; 662 } 663 664 static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp, 665 struct mod_hdcp_event_context *event_ctx, 666 struct mod_hdcp_transition_input_hdcp2 *input) 667 { 668 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 669 670 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 671 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 672 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 673 event_ctx->unexpected_event = 1; 674 goto out; 675 } 676 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 677 process_rxstatus(hdcp, event_ctx, input, &status); 678 goto out; 679 } 680 681 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 682 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 683 goto out; 684 if (event_ctx->rx_id_list_ready) 685 goto out; 686 } 687 if (is_hdmi_dvi_sl_hdcp(hdcp)) 688 if (!mod_hdcp_execute_and_set(check_stream_ready_available, 689 &input->stream_ready_available, 690 &status, hdcp, "stream_ready_available")) 691 goto out; 692 if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready, 693 &input->stream_ready_read, 694 &status, hdcp, "stream_ready_read")) 695 goto out; 696 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready, 697 &input->stream_ready_validation, 698 &status, hdcp, "stream_ready_validation")) 699 goto out; 700 701 out: 702 return status; 703 } 704 705 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp, 706 struct mod_hdcp_event_context *event_ctx, 707 struct mod_hdcp_transition_input_hdcp2 *input) 708 { 709 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 710 711 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 712 event_ctx->unexpected_event = 1; 713 goto out; 714 } 715 716 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps, 717 &input->rx_caps_read_dp, 718 &status, hdcp, "rx_caps_read_dp")) 719 goto out; 720 if (!mod_hdcp_execute_and_set(check_hdcp2_capable, 721 &input->hdcp2_capable_check, &status, 722 hdcp, "hdcp2_capable_check")) 723 goto out; 724 out: 725 return status; 726 } 727 728 static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp, 729 struct mod_hdcp_event_context *event_ctx, 730 struct mod_hdcp_transition_input_hdcp2 *input) 731 { 732 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 733 734 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 735 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 736 event_ctx->unexpected_event = 1; 737 goto out; 738 } 739 740 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 741 goto out; 742 if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type, 743 &input->content_stream_type_write, &status, 744 hdcp, "content_stream_type_write")) 745 goto out; 746 out: 747 return status; 748 } 749 750 enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, 751 struct mod_hdcp_event_context *event_ctx, 752 struct mod_hdcp_transition_input_hdcp2 *input) 753 { 754 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 755 756 switch (current_state(hdcp)) { 757 case H2_A0_KNOWN_HDCP2_CAPABLE_RX: 758 status = known_hdcp2_capable_rx(hdcp, event_ctx, input); 759 break; 760 case H2_A1_SEND_AKE_INIT: 761 status = send_ake_init(hdcp, event_ctx, input); 762 break; 763 case H2_A1_VALIDATE_AKE_CERT: 764 status = validate_ake_cert(hdcp, event_ctx, input); 765 break; 766 case H2_A1_SEND_NO_STORED_KM: 767 status = send_no_stored_km(hdcp, event_ctx, input); 768 break; 769 case H2_A1_READ_H_PRIME: 770 status = read_h_prime(hdcp, event_ctx, input); 771 break; 772 case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: 773 status = read_pairing_info_and_validate_h_prime(hdcp, 774 event_ctx, input); 775 break; 776 case H2_A1_SEND_STORED_KM: 777 status = send_stored_km(hdcp, event_ctx, input); 778 break; 779 case H2_A1_VALIDATE_H_PRIME: 780 status = validate_h_prime(hdcp, event_ctx, input); 781 break; 782 case H2_A2_LOCALITY_CHECK: 783 status = locality_check(hdcp, event_ctx, input); 784 break; 785 case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER: 786 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input); 787 break; 788 case H2_ENABLE_ENCRYPTION: 789 status = enable_encryption(hdcp, event_ctx, input); 790 break; 791 case H2_A5_AUTHENTICATED: 792 status = authenticated(hdcp, event_ctx, input); 793 break; 794 case H2_A6_WAIT_FOR_RX_ID_LIST: 795 status = wait_for_rx_id_list(hdcp, event_ctx, input); 796 break; 797 case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: 798 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); 799 break; 800 case H2_A9_SEND_STREAM_MANAGEMENT: 801 status = send_stream_management(hdcp, event_ctx, input); 802 break; 803 case H2_A9_VALIDATE_STREAM_READY: 804 status = validate_stream_ready(hdcp, event_ctx, input); 805 break; 806 default: 807 status = MOD_HDCP_STATUS_INVALID_STATE; 808 break; 809 } 810 811 return status; 812 } 813 814 enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, 815 struct mod_hdcp_event_context *event_ctx, 816 struct mod_hdcp_transition_input_hdcp2 *input) 817 { 818 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 819 820 switch (current_state(hdcp)) { 821 case D2_A0_DETERMINE_RX_HDCP_CAPABLE: 822 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input); 823 break; 824 case D2_A1_SEND_AKE_INIT: 825 status = send_ake_init(hdcp, event_ctx, input); 826 break; 827 case D2_A1_VALIDATE_AKE_CERT: 828 status = validate_ake_cert(hdcp, event_ctx, input); 829 break; 830 case D2_A1_SEND_NO_STORED_KM: 831 status = send_no_stored_km(hdcp, event_ctx, input); 832 break; 833 case D2_A1_READ_H_PRIME: 834 status = read_h_prime(hdcp, event_ctx, input); 835 break; 836 case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: 837 status = read_pairing_info_and_validate_h_prime(hdcp, 838 event_ctx, input); 839 break; 840 case D2_A1_SEND_STORED_KM: 841 status = send_stored_km(hdcp, event_ctx, input); 842 break; 843 case D2_A1_VALIDATE_H_PRIME: 844 status = validate_h_prime(hdcp, event_ctx, input); 845 break; 846 case D2_A2_LOCALITY_CHECK: 847 status = locality_check(hdcp, event_ctx, input); 848 break; 849 case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER: 850 status = exchange_ks_and_test_for_repeater(hdcp, 851 event_ctx, input); 852 break; 853 case D2_SEND_CONTENT_STREAM_TYPE: 854 status = send_content_stream_type_dp(hdcp, event_ctx, input); 855 break; 856 case D2_ENABLE_ENCRYPTION: 857 status = enable_encryption(hdcp, event_ctx, input); 858 break; 859 case D2_A5_AUTHENTICATED: 860 status = authenticated(hdcp, event_ctx, input); 861 break; 862 case D2_A6_WAIT_FOR_RX_ID_LIST: 863 status = wait_for_rx_id_list(hdcp, event_ctx, input); 864 break; 865 case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: 866 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); 867 break; 868 case D2_A9_SEND_STREAM_MANAGEMENT: 869 status = send_stream_management(hdcp, event_ctx, input); 870 break; 871 case D2_A9_VALIDATE_STREAM_READY: 872 status = validate_stream_ready(hdcp, event_ctx, input); 873 break; 874 default: 875 status = MOD_HDCP_STATUS_INVALID_STATE; 876 break; 877 } 878 879 return status; 880 } 881