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(rxstatus: 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 struct mod_hdcp_trace *trace = &hdcp->connection.trace;
52
53 if (is_dp_hdcp(hdcp))
54 status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) &&
55 HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ?
56 MOD_HDCP_STATUS_SUCCESS :
57 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
58 else
59 status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi
60 & HDCP_2_2_HDMI_SUPPORT_MASK)
61 ? MOD_HDCP_STATUS_SUCCESS
62 : MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
63
64 if (status == MOD_HDCP_STATUS_SUCCESS)
65 trace->hdcp2.attempt_count++;
66
67 return status;
68}
69
70static inline enum mod_hdcp_status check_reauthentication_request(
71 struct mod_hdcp *hdcp)
72{
73 uint8_t ret = 0;
74
75 if (is_dp_hdcp(hdcp))
76 ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
77 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
78 MOD_HDCP_STATUS_SUCCESS;
79 else
80 ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[1]) ?
81 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
82 MOD_HDCP_STATUS_SUCCESS;
83 return ret;
84}
85
86static inline enum mod_hdcp_status check_link_integrity_failure_dp(
87 struct mod_hdcp *hdcp)
88{
89 return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
90 MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE :
91 MOD_HDCP_STATUS_SUCCESS;
92}
93
94static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp)
95{
96 enum mod_hdcp_status status;
97
98 if (is_dp_hdcp(hdcp)) {
99 status = MOD_HDCP_STATUS_SUCCESS;
100 } else {
101 status = mod_hdcp_read_rxstatus(hdcp);
102 if (status == MOD_HDCP_STATUS_SUCCESS) {
103 const uint16_t size = get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
104 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ?
105 MOD_HDCP_STATUS_SUCCESS :
106 MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING;
107 }
108 }
109 return status;
110}
111
112static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp)
113{
114 enum mod_hdcp_status status;
115
116 status = mod_hdcp_read_rxstatus(hdcp);
117 if (status != MOD_HDCP_STATUS_SUCCESS)
118 goto out;
119
120 if (is_dp_hdcp(hdcp)) {
121 status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
122 MOD_HDCP_STATUS_SUCCESS :
123 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
124 } else {
125 const uint16_t size = get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
126 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ?
127 MOD_HDCP_STATUS_SUCCESS :
128 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
129 }
130out:
131 return status;
132}
133
134static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp)
135{
136 enum mod_hdcp_status status;
137
138 status = mod_hdcp_read_rxstatus(hdcp);
139 if (status != MOD_HDCP_STATUS_SUCCESS)
140 goto out;
141
142 if (is_dp_hdcp(hdcp)) {
143 status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
144 MOD_HDCP_STATUS_SUCCESS :
145 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
146 } else {
147 const uint16_t size = get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
148 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ?
149 MOD_HDCP_STATUS_SUCCESS :
150 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
151 }
152out:
153 return status;
154}
155
156static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp)
157{
158 enum mod_hdcp_status status = MOD_HDCP_STATUS_FAILURE;
159 uint16_t max_wait = 20; // units of ms
160 uint16_t num_polls = 5;
161 uint16_t wait_time = max_wait / num_polls;
162
163 if (is_dp_hdcp(hdcp))
164 status = MOD_HDCP_STATUS_INVALID_OPERATION;
165 else
166 for (; num_polls; num_polls--) {
167 msleep(msecs: wait_time);
168
169 status = mod_hdcp_read_rxstatus(hdcp);
170 if (status != MOD_HDCP_STATUS_SUCCESS)
171 break;
172
173 const uint16_t size = get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
174 status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ?
175 MOD_HDCP_STATUS_SUCCESS :
176 MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING;
177 if (status == MOD_HDCP_STATUS_SUCCESS)
178 break;
179 }
180 return status;
181}
182
183static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp)
184{
185 enum mod_hdcp_status status;
186
187 if (is_dp_hdcp(hdcp)) {
188 status = MOD_HDCP_STATUS_INVALID_OPERATION;
189 } else {
190 status = mod_hdcp_read_rxstatus(hdcp);
191 if (status != MOD_HDCP_STATUS_SUCCESS)
192 goto out;
193 const uint16_t size = get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
194 status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ?
195 MOD_HDCP_STATUS_SUCCESS :
196 MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING;
197 }
198out:
199 return status;
200}
201
202static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
203{
204 return HDCP_2_2_DEV_COUNT_LO(hdcp->auth.msg.hdcp2.rx_id_list[2]) +
205 (HDCP_2_2_DEV_COUNT_HI(hdcp->auth.msg.hdcp2.rx_id_list[1]) << 4);
206}
207
208static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
209{
210 struct mod_hdcp_trace *trace = &hdcp->connection.trace;
211
212 /* Avoid device count == 0 to do authentication */
213 if (get_device_count(hdcp) == 0)
214 return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE;
215
216 trace->hdcp2.downstream_device_count = get_device_count(hdcp);
217 trace->hdcp2.hdcp1_device_downstream =
218 HDCP_2_2_HDCP1_DEVICE_CONNECTED(hdcp->auth.msg.hdcp2.rx_id_list[2]);
219 trace->hdcp2.hdcp2_legacy_device_downstream =
220 HDCP_2_2_HDCP_2_0_REP_CONNECTED(hdcp->auth.msg.hdcp2.rx_id_list[2]);
221 /* Some MST display may choose to report the internal panel as an HDCP RX. */
222 /* To update this condition with 1(because the immediate repeater's internal */
223 /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */
224 /* Device count must be greater than or equal to tracked hdcp displays. */
225 return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
226 MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
227 MOD_HDCP_STATUS_SUCCESS;
228}
229
230static uint8_t process_rxstatus(struct mod_hdcp *hdcp,
231 struct mod_hdcp_event_context *event_ctx,
232 struct mod_hdcp_transition_input_hdcp2 *input,
233 enum mod_hdcp_status *status)
234{
235 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rxstatus,
236 flag: &input->rxstatus_read, status,
237 hdcp, str: "rxstatus_read"))
238 goto out;
239 if (!mod_hdcp_execute_and_set(func: check_reauthentication_request,
240 flag: &input->reauth_request_check, status,
241 hdcp, str: "reauth_request_check"))
242 goto out;
243 if (is_dp_hdcp(hdcp)) {
244 if (!mod_hdcp_execute_and_set(func: check_link_integrity_failure_dp,
245 flag: &input->link_integrity_check_dp, status,
246 hdcp, str: "link_integrity_check_dp"))
247 goto out;
248 }
249 if (hdcp->connection.is_repeater)
250 if (check_receiver_id_list_ready(hdcp) ==
251 MOD_HDCP_STATUS_SUCCESS) {
252 HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready");
253 event_ctx->rx_id_list_ready = 1;
254 if (is_dp_hdcp(hdcp))
255 hdcp->auth.msg.hdcp2.rx_id_list_size =
256 sizeof(hdcp->auth.msg.hdcp2.rx_id_list);
257 else
258 hdcp->auth.msg.hdcp2.rx_id_list_size =
259 get_hdmi_rxstatus_msg_size(rxstatus: hdcp->auth.msg.hdcp2.rxstatus);
260 }
261out:
262 return (*status == MOD_HDCP_STATUS_SUCCESS);
263}
264
265static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp,
266 struct mod_hdcp_event_context *event_ctx,
267 struct mod_hdcp_transition_input_hdcp2 *input)
268{
269 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
270
271 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
272 event_ctx->unexpected_event = 1;
273 goto out;
274 }
275
276 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_hdcp2version,
277 flag: &input->hdcp2version_read, status: &status,
278 hdcp, str: "hdcp2version_read"))
279 goto out;
280 if (!mod_hdcp_execute_and_set(func: check_hdcp2_capable,
281 flag: &input->hdcp2_capable_check, status: &status,
282 hdcp, str: "hdcp2_capable"))
283 goto out;
284out:
285 return status;
286}
287
288static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp,
289 struct mod_hdcp_event_context *event_ctx,
290 struct mod_hdcp_transition_input_hdcp2 *input)
291{
292 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
293
294 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
295 event_ctx->unexpected_event = 1;
296 goto out;
297 }
298
299 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_create_session,
300 flag: &input->create_session, status: &status,
301 hdcp, str: "create_session"))
302 goto out;
303 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_ake_init,
304 flag: &input->ake_init_prepare, status: &status,
305 hdcp, str: "ake_init_prepare"))
306 goto out;
307 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_ake_init,
308 flag: &input->ake_init_write, status: &status,
309 hdcp, str: "ake_init_write"))
310 goto out;
311out:
312 return status;
313}
314
315static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp,
316 struct mod_hdcp_event_context *event_ctx,
317 struct mod_hdcp_transition_input_hdcp2 *input)
318{
319 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
320
321
322 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
323 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
324 event_ctx->unexpected_event = 1;
325 goto out;
326 }
327
328 if (is_hdmi_dvi_sl_hdcp(hdcp))
329 if (!mod_hdcp_execute_and_set(func: check_ake_cert_available,
330 flag: &input->ake_cert_available, status: &status,
331 hdcp, str: "ake_cert_available"))
332 goto out;
333 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_ake_cert,
334 flag: &input->ake_cert_read, status: &status,
335 hdcp, str: "ake_cert_read"))
336 goto out;
337 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_ake_cert,
338 flag: &input->ake_cert_validation, status: &status,
339 hdcp, str: "ake_cert_validation"))
340 goto out;
341out:
342 return status;
343}
344
345static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp,
346 struct mod_hdcp_event_context *event_ctx,
347 struct mod_hdcp_transition_input_hdcp2 *input)
348{
349 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
350
351 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
352 event_ctx->unexpected_event = 1;
353 goto out;
354 }
355
356 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_no_stored_km,
357 flag: &input->no_stored_km_write, status: &status,
358 hdcp, str: "no_stored_km_write"))
359 goto out;
360out:
361 return status;
362}
363
364static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp,
365 struct mod_hdcp_event_context *event_ctx,
366 struct mod_hdcp_transition_input_hdcp2 *input)
367{
368 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
369
370 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
371 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
372 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
373 event_ctx->unexpected_event = 1;
374 goto out;
375 }
376
377 if (!mod_hdcp_execute_and_set(func: check_h_prime_available,
378 flag: &input->h_prime_available, status: &status,
379 hdcp, str: "h_prime_available"))
380 goto out;
381
382 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_h_prime,
383 flag: &input->h_prime_read, status: &status,
384 hdcp, str: "h_prime_read"))
385 goto out;
386out:
387 return status;
388}
389
390static enum mod_hdcp_status read_pairing_info_and_validate_h_prime(
391 struct mod_hdcp *hdcp,
392 struct mod_hdcp_event_context *event_ctx,
393 struct mod_hdcp_transition_input_hdcp2 *input)
394{
395 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
396
397 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
398 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
399 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
400 event_ctx->unexpected_event = 1;
401 goto out;
402 }
403
404 if (!mod_hdcp_execute_and_set(func: check_pairing_info_available,
405 flag: &input->pairing_available, status: &status,
406 hdcp, str: "pairing_available"))
407 goto out;
408 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_pairing_info,
409 flag: &input->pairing_info_read, status: &status,
410 hdcp, str: "pairing_info_read"))
411 goto out;
412 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_h_prime,
413 flag: &input->h_prime_validation, status: &status,
414 hdcp, str: "h_prime_validation"))
415 goto out;
416out:
417 return status;
418}
419
420static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp,
421 struct mod_hdcp_event_context *event_ctx,
422 struct mod_hdcp_transition_input_hdcp2 *input)
423{
424 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
425
426 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
427 event_ctx->unexpected_event = 1;
428 goto out;
429 }
430
431 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_stored_km,
432 flag: &input->stored_km_write, status: &status,
433 hdcp, str: "stored_km_write"))
434 goto out;
435out:
436 return status;
437}
438
439static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp,
440 struct mod_hdcp_event_context *event_ctx,
441 struct mod_hdcp_transition_input_hdcp2 *input)
442{
443 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
444
445 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
446 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
447 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
448 event_ctx->unexpected_event = 1;
449 goto out;
450 }
451
452 if (!mod_hdcp_execute_and_set(func: check_h_prime_available,
453 flag: &input->h_prime_available, status: &status,
454 hdcp, str: "h_prime_available"))
455 goto out;
456 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_h_prime,
457 flag: &input->h_prime_read, status: &status,
458 hdcp, str: "h_prime_read"))
459 goto out;
460 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_h_prime,
461 flag: &input->h_prime_validation, status: &status,
462 hdcp, str: "h_prime_validation"))
463 goto out;
464out:
465 return status;
466}
467
468static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp,
469 struct mod_hdcp_event_context *event_ctx,
470 struct mod_hdcp_transition_input_hdcp2 *input)
471{
472 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
473
474 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
475 event_ctx->unexpected_event = 1;
476 goto out;
477 }
478
479 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_lc_init,
480 flag: &input->lc_init_prepare, status: &status,
481 hdcp, str: "lc_init_prepare"))
482 goto out;
483
484 if (hdcp->connection.link.adjust.hdcp2.use_fw_locality_check) {
485 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_poll_read_lc_fw,
486 flag: &input->l_prime_combo_read, status: &status,
487 hdcp, str: "l_prime_combo_read"))
488 goto out;
489 } else {
490 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_lc_init,
491 flag: &input->lc_init_write, status: &status,
492 hdcp, str: "lc_init_write"))
493 goto out;
494 if (is_dp_hdcp(hdcp))
495 msleep(msecs: 16);
496 else
497 if (!mod_hdcp_execute_and_set(func: poll_l_prime_available,
498 flag: &input->l_prime_available_poll, status: &status,
499 hdcp, str: "l_prime_available_poll"))
500 goto out;
501 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_l_prime,
502 flag: &input->l_prime_read, status: &status,
503 hdcp, str: "l_prime_read"))
504 goto out;
505 }
506
507 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_l_prime,
508 flag: &input->l_prime_validation, status: &status,
509 hdcp, str: "l_prime_validation"))
510 goto out;
511out:
512 return status;
513}
514
515static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp,
516 struct mod_hdcp_event_context *event_ctx,
517 struct mod_hdcp_transition_input_hdcp2 *input)
518{
519 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
520
521 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
522 event_ctx->unexpected_event = 1;
523 goto out;
524 }
525
526 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_eks,
527 flag: &input->eks_prepare, status: &status,
528 hdcp, str: "eks_prepare"))
529 goto out;
530 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_eks,
531 flag: &input->eks_write, status: &status,
532 hdcp, str: "eks_write"))
533 goto out;
534out:
535 return status;
536}
537
538static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp,
539 struct mod_hdcp_event_context *event_ctx,
540 struct mod_hdcp_transition_input_hdcp2 *input)
541{
542 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
543
544 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
545 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
546 event_ctx->unexpected_event = 1;
547 goto out;
548 }
549 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
550 process_rxstatus(hdcp, event_ctx, input, status: &status);
551 goto out;
552 }
553
554 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
555 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
556 goto out;
557 if (event_ctx->rx_id_list_ready)
558 goto out;
559 }
560 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_enable_encryption,
561 flag: &input->enable_encryption, status: &status,
562 hdcp, str: "enable_encryption"))
563 goto out;
564 if (is_dp_mst_hdcp(hdcp)) {
565 if (!mod_hdcp_execute_and_set(
566 func: mod_hdcp_hdcp2_enable_dp_stream_encryption,
567 flag: &input->stream_encryption_dp, status: &status,
568 hdcp, str: "stream_encryption_dp"))
569 goto out;
570 }
571out:
572 return status;
573}
574
575static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
576 struct mod_hdcp_event_context *event_ctx,
577 struct mod_hdcp_transition_input_hdcp2 *input)
578{
579 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
580
581 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
582 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
583 event_ctx->unexpected_event = 1;
584 goto out;
585 }
586
587 process_rxstatus(hdcp, event_ctx, input, status: &status);
588out:
589 return status;
590}
591
592static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp,
593 struct mod_hdcp_event_context *event_ctx,
594 struct mod_hdcp_transition_input_hdcp2 *input)
595{
596 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
597
598 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
599 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
600 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
601 event_ctx->unexpected_event = 1;
602 goto out;
603 }
604
605 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
606 goto out;
607 if (!event_ctx->rx_id_list_ready) {
608 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
609 goto out;
610 }
611out:
612 return status;
613}
614
615static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp,
616 struct mod_hdcp_event_context *event_ctx,
617 struct mod_hdcp_transition_input_hdcp2 *input)
618{
619 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
620
621 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
622 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
623 event_ctx->unexpected_event = 1;
624 goto out;
625 }
626 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
627 process_rxstatus(hdcp, event_ctx, input, status: &status);
628 goto out;
629 }
630
631 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rx_id_list,
632 flag: &input->rx_id_list_read,
633 status: &status, hdcp, str: "receiver_id_list_read"))
634 goto out;
635 if (!mod_hdcp_execute_and_set(func: check_device_count,
636 flag: &input->device_count_check,
637 status: &status, hdcp, str: "device_count_check"))
638 goto out;
639 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_rx_id_list,
640 flag: &input->rx_id_list_validation,
641 status: &status, hdcp, str: "rx_id_list_validation"))
642 goto out;
643 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_repeater_auth_ack,
644 flag: &input->repeater_auth_ack_write,
645 status: &status, hdcp, str: "repeater_auth_ack_write"))
646 goto out;
647out:
648 return status;
649}
650
651static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp,
652 struct mod_hdcp_event_context *event_ctx,
653 struct mod_hdcp_transition_input_hdcp2 *input)
654{
655 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
656
657 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
658 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
659 event_ctx->unexpected_event = 1;
660 goto out;
661 }
662 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
663 process_rxstatus(hdcp, event_ctx, input, status: &status);
664 goto out;
665 }
666
667 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
668 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
669 goto out;
670 if (event_ctx->rx_id_list_ready)
671 goto out;
672 }
673 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_stream_management,
674 flag: &input->prepare_stream_manage,
675 status: &status, hdcp, str: "prepare_stream_manage"))
676 goto out;
677
678 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_stream_manage,
679 flag: &input->stream_manage_write,
680 status: &status, hdcp, str: "stream_manage_write"))
681 goto out;
682out:
683 return status;
684}
685
686static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp,
687 struct mod_hdcp_event_context *event_ctx,
688 struct mod_hdcp_transition_input_hdcp2 *input)
689{
690 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
691
692 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
693 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
694 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
695 event_ctx->unexpected_event = 1;
696 goto out;
697 }
698 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
699 process_rxstatus(hdcp, event_ctx, input, status: &status);
700 goto out;
701 }
702
703 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
704 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
705 goto out;
706 if (event_ctx->rx_id_list_ready)
707 goto out;
708 }
709 if (is_hdmi_dvi_sl_hdcp(hdcp))
710 if (!mod_hdcp_execute_and_set(func: check_stream_ready_available,
711 flag: &input->stream_ready_available,
712 status: &status, hdcp, str: "stream_ready_available"))
713 goto out;
714 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_stream_ready,
715 flag: &input->stream_ready_read,
716 status: &status, hdcp, str: "stream_ready_read"))
717 goto out;
718 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_stream_ready,
719 flag: &input->stream_ready_validation,
720 status: &status, hdcp, str: "stream_ready_validation"))
721 goto out;
722
723out:
724 return status;
725}
726
727static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
728 struct mod_hdcp_event_context *event_ctx,
729 struct mod_hdcp_transition_input_hdcp2 *input)
730{
731 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
732
733 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
734 event_ctx->unexpected_event = 1;
735 goto out;
736 }
737
738 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rxcaps,
739 flag: &input->rx_caps_read_dp,
740 status: &status, hdcp, str: "rx_caps_read_dp"))
741 goto out;
742 if (!mod_hdcp_execute_and_set(func: check_hdcp2_capable,
743 flag: &input->hdcp2_capable_check, status: &status,
744 hdcp, str: "hdcp2_capable_check"))
745 goto out;
746out:
747 return status;
748}
749
750static enum mod_hdcp_status send_content_stream_type_dp(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 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
757 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
758 event_ctx->unexpected_event = 1;
759 goto out;
760 }
761
762 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
763 goto out;
764 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_content_type,
765 flag: &input->content_stream_type_write, status: &status,
766 hdcp, str: "content_stream_type_write"))
767 goto out;
768out:
769 return status;
770}
771
772enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
773 struct mod_hdcp_event_context *event_ctx,
774 struct mod_hdcp_transition_input_hdcp2 *input)
775{
776 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
777
778 switch (current_state(hdcp)) {
779 case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
780 status = known_hdcp2_capable_rx(hdcp, event_ctx, input);
781 break;
782 case H2_A1_SEND_AKE_INIT:
783 status = send_ake_init(hdcp, event_ctx, input);
784 break;
785 case H2_A1_VALIDATE_AKE_CERT:
786 status = validate_ake_cert(hdcp, event_ctx, input);
787 break;
788 case H2_A1_SEND_NO_STORED_KM:
789 status = send_no_stored_km(hdcp, event_ctx, input);
790 break;
791 case H2_A1_READ_H_PRIME:
792 status = read_h_prime(hdcp, event_ctx, input);
793 break;
794 case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
795 status = read_pairing_info_and_validate_h_prime(hdcp,
796 event_ctx, input);
797 break;
798 case H2_A1_SEND_STORED_KM:
799 status = send_stored_km(hdcp, event_ctx, input);
800 break;
801 case H2_A1_VALIDATE_H_PRIME:
802 status = validate_h_prime(hdcp, event_ctx, input);
803 break;
804 case H2_A2_LOCALITY_CHECK:
805 status = locality_check(hdcp, event_ctx, input);
806 break;
807 case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
808 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input);
809 break;
810 case H2_ENABLE_ENCRYPTION:
811 status = enable_encryption(hdcp, event_ctx, input);
812 break;
813 case H2_A5_AUTHENTICATED:
814 status = authenticated(hdcp, event_ctx, input);
815 break;
816 case H2_A6_WAIT_FOR_RX_ID_LIST:
817 status = wait_for_rx_id_list(hdcp, event_ctx, input);
818 break;
819 case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
820 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
821 break;
822 case H2_A9_SEND_STREAM_MANAGEMENT:
823 status = send_stream_management(hdcp, event_ctx, input);
824 break;
825 case H2_A9_VALIDATE_STREAM_READY:
826 status = validate_stream_ready(hdcp, event_ctx, input);
827 break;
828 default:
829 status = MOD_HDCP_STATUS_INVALID_STATE;
830 break;
831 }
832
833 return status;
834}
835
836enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
837 struct mod_hdcp_event_context *event_ctx,
838 struct mod_hdcp_transition_input_hdcp2 *input)
839{
840 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
841
842 switch (current_state(hdcp)) {
843 case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
844 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
845 break;
846 case D2_A1_SEND_AKE_INIT:
847 status = send_ake_init(hdcp, event_ctx, input);
848 break;
849 case D2_A1_VALIDATE_AKE_CERT:
850 status = validate_ake_cert(hdcp, event_ctx, input);
851 break;
852 case D2_A1_SEND_NO_STORED_KM:
853 status = send_no_stored_km(hdcp, event_ctx, input);
854 break;
855 case D2_A1_READ_H_PRIME:
856 status = read_h_prime(hdcp, event_ctx, input);
857 break;
858 case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
859 status = read_pairing_info_and_validate_h_prime(hdcp,
860 event_ctx, input);
861 break;
862 case D2_A1_SEND_STORED_KM:
863 status = send_stored_km(hdcp, event_ctx, input);
864 break;
865 case D2_A1_VALIDATE_H_PRIME:
866 status = validate_h_prime(hdcp, event_ctx, input);
867 break;
868 case D2_A2_LOCALITY_CHECK:
869 status = locality_check(hdcp, event_ctx, input);
870 break;
871 case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
872 status = exchange_ks_and_test_for_repeater(hdcp,
873 event_ctx, input);
874 break;
875 case D2_SEND_CONTENT_STREAM_TYPE:
876 status = send_content_stream_type_dp(hdcp, event_ctx, input);
877 break;
878 case D2_ENABLE_ENCRYPTION:
879 status = enable_encryption(hdcp, event_ctx, input);
880 break;
881 case D2_A5_AUTHENTICATED:
882 status = authenticated(hdcp, event_ctx, input);
883 break;
884 case D2_A6_WAIT_FOR_RX_ID_LIST:
885 status = wait_for_rx_id_list(hdcp, event_ctx, input);
886 break;
887 case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
888 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
889 break;
890 case D2_A9_SEND_STREAM_MANAGEMENT:
891 status = send_stream_management(hdcp, event_ctx, input);
892 break;
893 case D2_A9_VALIDATE_STREAM_READY:
894 status = validate_stream_ready(hdcp, event_ctx, input);
895 break;
896 default:
897 status = MOD_HDCP_STATUS_INVALID_STATE;
898 break;
899 }
900
901 return status;
902}
903

source code of linux/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c