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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
30static 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
35static 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
48static 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
64static 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
80static 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
88static 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
106static 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 }
124out:
125 return status;
126}
127
128static 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 }
146out:
147 return status;
148}
149
150static 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
177static 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 }
192out:
193 return status;
194}
195
196static 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
202static 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
217static 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 }
248out:
249 return (*status == MOD_HDCP_STATUS_SUCCESS);
250}
251
252static 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;
271out:
272 return status;
273}
274
275static 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;
298out:
299 return status;
300}
301
302static 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;
328out:
329 return status;
330}
331
332static 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;
347out:
348 return status;
349}
350
351static 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;
373out:
374 return status;
375}
376
377static 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;
403out:
404 return status;
405}
406
407static 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;
422out:
423 return status;
424}
425
426static 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;
451out:
452 return status;
453}
454
455static 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;
489out:
490 return status;
491}
492
493static 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;
512out:
513 return status;
514}
515
516static 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 }
549out:
550 return status;
551}
552
553static 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);
566out:
567 return status;
568}
569
570static 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 }
589out:
590 return status;
591}
592
593static 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;
625out:
626 return status;
627}
628
629static 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;
660out:
661 return status;
662}
663
664static 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
701out:
702 return status;
703}
704
705static 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;
724out:
725 return status;
726}
727
728static 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;
746out:
747 return status;
748}
749
750enum 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
814enum 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}