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 enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp)
31{
32 uint8_t is_ready = 0;
33
34 if (is_dp_hdcp(hdcp))
35 is_ready = HDCP_2_2_DP_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 1 : 0;
36 else
37 is_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus[1]) &&
38 (HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
39 hdcp->auth.msg.hdcp2.rxstatus[0])) ? 1 : 0;
40 return is_ready ? MOD_HDCP_STATUS_SUCCESS :
41 MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
42}
43
44static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp)
45{
46 enum mod_hdcp_status status;
47
48 if (is_dp_hdcp(hdcp))
49 status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) &&
50 HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ?
51 MOD_HDCP_STATUS_SUCCESS :
52 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
53 else
54 status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & HDCP_2_2_HDMI_SUPPORT_MASK) ?
55 MOD_HDCP_STATUS_SUCCESS :
56 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
57 return status;
58}
59
60static inline enum mod_hdcp_status check_reauthentication_request(
61 struct mod_hdcp *hdcp)
62{
63 uint8_t ret = 0;
64
65 if (is_dp_hdcp(hdcp))
66 ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
67 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
68 MOD_HDCP_STATUS_SUCCESS;
69 else
70 ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[1]) ?
71 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
72 MOD_HDCP_STATUS_SUCCESS;
73 return ret;
74}
75
76static inline enum mod_hdcp_status check_link_integrity_failure_dp(
77 struct mod_hdcp *hdcp)
78{
79 return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
80 MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE :
81 MOD_HDCP_STATUS_SUCCESS;
82}
83
84static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp)
85{
86 enum mod_hdcp_status status;
87 uint16_t size;
88
89 if (is_dp_hdcp(hdcp)) {
90 status = MOD_HDCP_STATUS_SUCCESS;
91 } else {
92 status = mod_hdcp_read_rxstatus(hdcp);
93 if (status == MOD_HDCP_STATUS_SUCCESS) {
94 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
95 hdcp->auth.msg.hdcp2.rxstatus[0];
96 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ?
97 MOD_HDCP_STATUS_SUCCESS :
98 MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING;
99 }
100 }
101 return status;
102}
103
104static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp)
105{
106 enum mod_hdcp_status status;
107 uint8_t size;
108
109 status = mod_hdcp_read_rxstatus(hdcp);
110 if (status != MOD_HDCP_STATUS_SUCCESS)
111 goto out;
112
113 if (is_dp_hdcp(hdcp)) {
114 status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
115 MOD_HDCP_STATUS_SUCCESS :
116 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
117 } else {
118 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
119 hdcp->auth.msg.hdcp2.rxstatus[0];
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 uint8_t size;
132
133 status = mod_hdcp_read_rxstatus(hdcp);
134 if (status != MOD_HDCP_STATUS_SUCCESS)
135 goto out;
136
137 if (is_dp_hdcp(hdcp)) {
138 status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
139 MOD_HDCP_STATUS_SUCCESS :
140 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
141 } else {
142 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
143 hdcp->auth.msg.hdcp2.rxstatus[0];
144 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ?
145 MOD_HDCP_STATUS_SUCCESS :
146 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
147 }
148out:
149 return status;
150}
151
152static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp)
153{
154 enum mod_hdcp_status status;
155 uint8_t size;
156 uint16_t max_wait = 20; // units of ms
157 uint16_t num_polls = 5;
158 uint16_t wait_time = max_wait / num_polls;
159
160 if (is_dp_hdcp(hdcp))
161 status = MOD_HDCP_STATUS_INVALID_OPERATION;
162 else
163 for (; num_polls; num_polls--) {
164 msleep(msecs: wait_time);
165
166 status = mod_hdcp_read_rxstatus(hdcp);
167 if (status != MOD_HDCP_STATUS_SUCCESS)
168 break;
169
170 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
171 hdcp->auth.msg.hdcp2.rxstatus[0];
172 status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ?
173 MOD_HDCP_STATUS_SUCCESS :
174 MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING;
175 if (status == MOD_HDCP_STATUS_SUCCESS)
176 break;
177 }
178 return status;
179}
180
181static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp)
182{
183 enum mod_hdcp_status status;
184 uint8_t size;
185
186 if (is_dp_hdcp(hdcp)) {
187 status = MOD_HDCP_STATUS_INVALID_OPERATION;
188 } else {
189 status = mod_hdcp_read_rxstatus(hdcp);
190 if (status != MOD_HDCP_STATUS_SUCCESS)
191 goto out;
192 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
193 hdcp->auth.msg.hdcp2.rxstatus[0];
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 /* Avoid device count == 0 to do authentication */
211 if (get_device_count(hdcp) == 0)
212 return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE;
213
214 /* Some MST display may choose to report the internal panel as an HDCP RX. */
215 /* To update this condition with 1(because the immediate repeater's internal */
216 /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */
217 /* Device count must be greater than or equal to tracked hdcp displays. */
218 return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
219 MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
220 MOD_HDCP_STATUS_SUCCESS;
221}
222
223static uint8_t process_rxstatus(struct mod_hdcp *hdcp,
224 struct mod_hdcp_event_context *event_ctx,
225 struct mod_hdcp_transition_input_hdcp2 *input,
226 enum mod_hdcp_status *status)
227{
228 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rxstatus,
229 flag: &input->rxstatus_read, status,
230 hdcp, str: "rxstatus_read"))
231 goto out;
232 if (!mod_hdcp_execute_and_set(func: check_reauthentication_request,
233 flag: &input->reauth_request_check, status,
234 hdcp, str: "reauth_request_check"))
235 goto out;
236 if (is_dp_hdcp(hdcp)) {
237 if (!mod_hdcp_execute_and_set(func: check_link_integrity_failure_dp,
238 flag: &input->link_integrity_check_dp, status,
239 hdcp, str: "link_integrity_check_dp"))
240 goto out;
241 }
242 if (hdcp->connection.is_repeater)
243 if (check_receiver_id_list_ready(hdcp) ==
244 MOD_HDCP_STATUS_SUCCESS) {
245 HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready");
246 event_ctx->rx_id_list_ready = 1;
247 if (is_dp_hdcp(hdcp))
248 hdcp->auth.msg.hdcp2.rx_id_list_size =
249 sizeof(hdcp->auth.msg.hdcp2.rx_id_list);
250 else
251 hdcp->auth.msg.hdcp2.rx_id_list_size =
252 HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
253 hdcp->auth.msg.hdcp2.rxstatus[0];
254 }
255out:
256 return (*status == MOD_HDCP_STATUS_SUCCESS);
257}
258
259static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp,
260 struct mod_hdcp_event_context *event_ctx,
261 struct mod_hdcp_transition_input_hdcp2 *input)
262{
263 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
264
265 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
266 event_ctx->unexpected_event = 1;
267 goto out;
268 }
269
270 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_hdcp2version,
271 flag: &input->hdcp2version_read, status: &status,
272 hdcp, str: "hdcp2version_read"))
273 goto out;
274 if (!mod_hdcp_execute_and_set(func: check_hdcp2_capable,
275 flag: &input->hdcp2_capable_check, status: &status,
276 hdcp, str: "hdcp2_capable"))
277 goto out;
278out:
279 return status;
280}
281
282static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp,
283 struct mod_hdcp_event_context *event_ctx,
284 struct mod_hdcp_transition_input_hdcp2 *input)
285{
286 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
287
288 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
289 event_ctx->unexpected_event = 1;
290 goto out;
291 }
292
293 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_create_session,
294 flag: &input->create_session, status: &status,
295 hdcp, str: "create_session"))
296 goto out;
297 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_ake_init,
298 flag: &input->ake_init_prepare, status: &status,
299 hdcp, str: "ake_init_prepare"))
300 goto out;
301 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_ake_init,
302 flag: &input->ake_init_write, status: &status,
303 hdcp, str: "ake_init_write"))
304 goto out;
305out:
306 return status;
307}
308
309static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp,
310 struct mod_hdcp_event_context *event_ctx,
311 struct mod_hdcp_transition_input_hdcp2 *input)
312{
313 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
314
315
316 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
317 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
318 event_ctx->unexpected_event = 1;
319 goto out;
320 }
321
322 if (is_hdmi_dvi_sl_hdcp(hdcp))
323 if (!mod_hdcp_execute_and_set(func: check_ake_cert_available,
324 flag: &input->ake_cert_available, status: &status,
325 hdcp, str: "ake_cert_available"))
326 goto out;
327 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_ake_cert,
328 flag: &input->ake_cert_read, status: &status,
329 hdcp, str: "ake_cert_read"))
330 goto out;
331 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_ake_cert,
332 flag: &input->ake_cert_validation, status: &status,
333 hdcp, str: "ake_cert_validation"))
334 goto out;
335out:
336 return status;
337}
338
339static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp,
340 struct mod_hdcp_event_context *event_ctx,
341 struct mod_hdcp_transition_input_hdcp2 *input)
342{
343 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
344
345 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
346 event_ctx->unexpected_event = 1;
347 goto out;
348 }
349
350 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_no_stored_km,
351 flag: &input->no_stored_km_write, status: &status,
352 hdcp, str: "no_stored_km_write"))
353 goto out;
354out:
355 return status;
356}
357
358static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp,
359 struct mod_hdcp_event_context *event_ctx,
360 struct mod_hdcp_transition_input_hdcp2 *input)
361{
362 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
363
364 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
365 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
366 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
367 event_ctx->unexpected_event = 1;
368 goto out;
369 }
370
371 if (!mod_hdcp_execute_and_set(func: check_h_prime_available,
372 flag: &input->h_prime_available, status: &status,
373 hdcp, str: "h_prime_available"))
374 goto out;
375
376 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_h_prime,
377 flag: &input->h_prime_read, status: &status,
378 hdcp, str: "h_prime_read"))
379 goto out;
380out:
381 return status;
382}
383
384static enum mod_hdcp_status read_pairing_info_and_validate_h_prime(
385 struct mod_hdcp *hdcp,
386 struct mod_hdcp_event_context *event_ctx,
387 struct mod_hdcp_transition_input_hdcp2 *input)
388{
389 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
390
391 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
392 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
393 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
394 event_ctx->unexpected_event = 1;
395 goto out;
396 }
397
398 if (!mod_hdcp_execute_and_set(func: check_pairing_info_available,
399 flag: &input->pairing_available, status: &status,
400 hdcp, str: "pairing_available"))
401 goto out;
402 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_pairing_info,
403 flag: &input->pairing_info_read, status: &status,
404 hdcp, str: "pairing_info_read"))
405 goto out;
406 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_h_prime,
407 flag: &input->h_prime_validation, status: &status,
408 hdcp, str: "h_prime_validation"))
409 goto out;
410out:
411 return status;
412}
413
414static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp,
415 struct mod_hdcp_event_context *event_ctx,
416 struct mod_hdcp_transition_input_hdcp2 *input)
417{
418 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
419
420 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
421 event_ctx->unexpected_event = 1;
422 goto out;
423 }
424
425 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_stored_km,
426 flag: &input->stored_km_write, status: &status,
427 hdcp, str: "stored_km_write"))
428 goto out;
429out:
430 return status;
431}
432
433static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp,
434 struct mod_hdcp_event_context *event_ctx,
435 struct mod_hdcp_transition_input_hdcp2 *input)
436{
437 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
438
439 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
440 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
441 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
442 event_ctx->unexpected_event = 1;
443 goto out;
444 }
445
446 if (!mod_hdcp_execute_and_set(func: check_h_prime_available,
447 flag: &input->h_prime_available, status: &status,
448 hdcp, str: "h_prime_available"))
449 goto out;
450 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_h_prime,
451 flag: &input->h_prime_read, status: &status,
452 hdcp, str: "h_prime_read"))
453 goto out;
454 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_h_prime,
455 flag: &input->h_prime_validation, status: &status,
456 hdcp, str: "h_prime_validation"))
457 goto out;
458out:
459 return status;
460}
461
462static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp,
463 struct mod_hdcp_event_context *event_ctx,
464 struct mod_hdcp_transition_input_hdcp2 *input)
465{
466 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
467
468 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
469 event_ctx->unexpected_event = 1;
470 goto out;
471 }
472
473 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_lc_init,
474 flag: &input->lc_init_prepare, status: &status,
475 hdcp, str: "lc_init_prepare"))
476 goto out;
477 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_lc_init,
478 flag: &input->lc_init_write, status: &status,
479 hdcp, str: "lc_init_write"))
480 goto out;
481 if (is_dp_hdcp(hdcp))
482 msleep(msecs: 16);
483 else
484 if (!mod_hdcp_execute_and_set(func: poll_l_prime_available,
485 flag: &input->l_prime_available_poll, status: &status,
486 hdcp, str: "l_prime_available_poll"))
487 goto out;
488 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_l_prime,
489 flag: &input->l_prime_read, status: &status,
490 hdcp, str: "l_prime_read"))
491 goto out;
492 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_l_prime,
493 flag: &input->l_prime_validation, status: &status,
494 hdcp, str: "l_prime_validation"))
495 goto out;
496out:
497 return status;
498}
499
500static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp,
501 struct mod_hdcp_event_context *event_ctx,
502 struct mod_hdcp_transition_input_hdcp2 *input)
503{
504 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
505
506 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
507 event_ctx->unexpected_event = 1;
508 goto out;
509 }
510
511 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_eks,
512 flag: &input->eks_prepare, status: &status,
513 hdcp, str: "eks_prepare"))
514 goto out;
515 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_eks,
516 flag: &input->eks_write, status: &status,
517 hdcp, str: "eks_write"))
518 goto out;
519out:
520 return status;
521}
522
523static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp,
524 struct mod_hdcp_event_context *event_ctx,
525 struct mod_hdcp_transition_input_hdcp2 *input)
526{
527 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
528
529 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
530 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
531 event_ctx->unexpected_event = 1;
532 goto out;
533 }
534 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
535 process_rxstatus(hdcp, event_ctx, input, status: &status);
536 goto out;
537 }
538
539 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
540 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
541 goto out;
542 if (event_ctx->rx_id_list_ready)
543 goto out;
544 }
545 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_enable_encryption,
546 flag: &input->enable_encryption, status: &status,
547 hdcp, str: "enable_encryption"))
548 goto out;
549 if (is_dp_mst_hdcp(hdcp)) {
550 if (!mod_hdcp_execute_and_set(
551 func: mod_hdcp_hdcp2_enable_dp_stream_encryption,
552 flag: &input->stream_encryption_dp, status: &status,
553 hdcp, str: "stream_encryption_dp"))
554 goto out;
555 }
556out:
557 return status;
558}
559
560static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
561 struct mod_hdcp_event_context *event_ctx,
562 struct mod_hdcp_transition_input_hdcp2 *input)
563{
564 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
565
566 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
567 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
568 event_ctx->unexpected_event = 1;
569 goto out;
570 }
571
572 process_rxstatus(hdcp, event_ctx, input, status: &status);
573out:
574 return status;
575}
576
577static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp,
578 struct mod_hdcp_event_context *event_ctx,
579 struct mod_hdcp_transition_input_hdcp2 *input)
580{
581 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
582
583 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
584 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
585 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
586 event_ctx->unexpected_event = 1;
587 goto out;
588 }
589
590 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
591 goto out;
592 if (!event_ctx->rx_id_list_ready) {
593 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
594 goto out;
595 }
596out:
597 return status;
598}
599
600static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp,
601 struct mod_hdcp_event_context *event_ctx,
602 struct mod_hdcp_transition_input_hdcp2 *input)
603{
604 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
605
606 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
607 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
608 event_ctx->unexpected_event = 1;
609 goto out;
610 }
611 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
612 process_rxstatus(hdcp, event_ctx, input, status: &status);
613 goto out;
614 }
615
616 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rx_id_list,
617 flag: &input->rx_id_list_read,
618 status: &status, hdcp, str: "receiver_id_list_read"))
619 goto out;
620 if (!mod_hdcp_execute_and_set(func: check_device_count,
621 flag: &input->device_count_check,
622 status: &status, hdcp, str: "device_count_check"))
623 goto out;
624 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_rx_id_list,
625 flag: &input->rx_id_list_validation,
626 status: &status, hdcp, str: "rx_id_list_validation"))
627 goto out;
628 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_repeater_auth_ack,
629 flag: &input->repeater_auth_ack_write,
630 status: &status, hdcp, str: "repeater_auth_ack_write"))
631 goto out;
632out:
633 return status;
634}
635
636static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp,
637 struct mod_hdcp_event_context *event_ctx,
638 struct mod_hdcp_transition_input_hdcp2 *input)
639{
640 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
641
642 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
643 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
644 event_ctx->unexpected_event = 1;
645 goto out;
646 }
647 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
648 process_rxstatus(hdcp, event_ctx, input, status: &status);
649 goto out;
650 }
651
652 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
653 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
654 goto out;
655 if (event_ctx->rx_id_list_ready)
656 goto out;
657 }
658 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_prepare_stream_management,
659 flag: &input->prepare_stream_manage,
660 status: &status, hdcp, str: "prepare_stream_manage"))
661 goto out;
662
663 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_stream_manage,
664 flag: &input->stream_manage_write,
665 status: &status, hdcp, str: "stream_manage_write"))
666 goto out;
667out:
668 return status;
669}
670
671static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp,
672 struct mod_hdcp_event_context *event_ctx,
673 struct mod_hdcp_transition_input_hdcp2 *input)
674{
675 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
676
677 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
678 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
679 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
680 event_ctx->unexpected_event = 1;
681 goto out;
682 }
683 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
684 process_rxstatus(hdcp, event_ctx, input, status: &status);
685 goto out;
686 }
687
688 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
689 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
690 goto out;
691 if (event_ctx->rx_id_list_ready)
692 goto out;
693 }
694 if (is_hdmi_dvi_sl_hdcp(hdcp))
695 if (!mod_hdcp_execute_and_set(func: check_stream_ready_available,
696 flag: &input->stream_ready_available,
697 status: &status, hdcp, str: "stream_ready_available"))
698 goto out;
699 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_stream_ready,
700 flag: &input->stream_ready_read,
701 status: &status, hdcp, str: "stream_ready_read"))
702 goto out;
703 if (!mod_hdcp_execute_and_set(func: mod_hdcp_hdcp2_validate_stream_ready,
704 flag: &input->stream_ready_validation,
705 status: &status, hdcp, str: "stream_ready_validation"))
706 goto out;
707
708out:
709 return status;
710}
711
712static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
713 struct mod_hdcp_event_context *event_ctx,
714 struct mod_hdcp_transition_input_hdcp2 *input)
715{
716 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
717
718 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
719 event_ctx->unexpected_event = 1;
720 goto out;
721 }
722
723 if (!mod_hdcp_execute_and_set(func: mod_hdcp_read_rxcaps,
724 flag: &input->rx_caps_read_dp,
725 status: &status, hdcp, str: "rx_caps_read_dp"))
726 goto out;
727 if (!mod_hdcp_execute_and_set(func: check_hdcp2_capable,
728 flag: &input->hdcp2_capable_check, status: &status,
729 hdcp, str: "hdcp2_capable_check"))
730 goto out;
731out:
732 return status;
733}
734
735static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp,
736 struct mod_hdcp_event_context *event_ctx,
737 struct mod_hdcp_transition_input_hdcp2 *input)
738{
739 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
740
741 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
742 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
743 event_ctx->unexpected_event = 1;
744 goto out;
745 }
746
747 if (!process_rxstatus(hdcp, event_ctx, input, status: &status))
748 goto out;
749 if (!mod_hdcp_execute_and_set(func: mod_hdcp_write_content_type,
750 flag: &input->content_stream_type_write, status: &status,
751 hdcp, str: "content_stream_type_write"))
752 goto out;
753out:
754 return status;
755}
756
757enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
758 struct mod_hdcp_event_context *event_ctx,
759 struct mod_hdcp_transition_input_hdcp2 *input)
760{
761 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
762
763 switch (current_state(hdcp)) {
764 case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
765 status = known_hdcp2_capable_rx(hdcp, event_ctx, input);
766 break;
767 case H2_A1_SEND_AKE_INIT:
768 status = send_ake_init(hdcp, event_ctx, input);
769 break;
770 case H2_A1_VALIDATE_AKE_CERT:
771 status = validate_ake_cert(hdcp, event_ctx, input);
772 break;
773 case H2_A1_SEND_NO_STORED_KM:
774 status = send_no_stored_km(hdcp, event_ctx, input);
775 break;
776 case H2_A1_READ_H_PRIME:
777 status = read_h_prime(hdcp, event_ctx, input);
778 break;
779 case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
780 status = read_pairing_info_and_validate_h_prime(hdcp,
781 event_ctx, input);
782 break;
783 case H2_A1_SEND_STORED_KM:
784 status = send_stored_km(hdcp, event_ctx, input);
785 break;
786 case H2_A1_VALIDATE_H_PRIME:
787 status = validate_h_prime(hdcp, event_ctx, input);
788 break;
789 case H2_A2_LOCALITY_CHECK:
790 status = locality_check(hdcp, event_ctx, input);
791 break;
792 case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
793 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input);
794 break;
795 case H2_ENABLE_ENCRYPTION:
796 status = enable_encryption(hdcp, event_ctx, input);
797 break;
798 case H2_A5_AUTHENTICATED:
799 status = authenticated(hdcp, event_ctx, input);
800 break;
801 case H2_A6_WAIT_FOR_RX_ID_LIST:
802 status = wait_for_rx_id_list(hdcp, event_ctx, input);
803 break;
804 case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
805 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
806 break;
807 case H2_A9_SEND_STREAM_MANAGEMENT:
808 status = send_stream_management(hdcp, event_ctx, input);
809 break;
810 case H2_A9_VALIDATE_STREAM_READY:
811 status = validate_stream_ready(hdcp, event_ctx, input);
812 break;
813 default:
814 status = MOD_HDCP_STATUS_INVALID_STATE;
815 break;
816 }
817
818 return status;
819}
820
821enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
822 struct mod_hdcp_event_context *event_ctx,
823 struct mod_hdcp_transition_input_hdcp2 *input)
824{
825 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
826
827 switch (current_state(hdcp)) {
828 case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
829 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
830 break;
831 case D2_A1_SEND_AKE_INIT:
832 status = send_ake_init(hdcp, event_ctx, input);
833 break;
834 case D2_A1_VALIDATE_AKE_CERT:
835 status = validate_ake_cert(hdcp, event_ctx, input);
836 break;
837 case D2_A1_SEND_NO_STORED_KM:
838 status = send_no_stored_km(hdcp, event_ctx, input);
839 break;
840 case D2_A1_READ_H_PRIME:
841 status = read_h_prime(hdcp, event_ctx, input);
842 break;
843 case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
844 status = read_pairing_info_and_validate_h_prime(hdcp,
845 event_ctx, input);
846 break;
847 case D2_A1_SEND_STORED_KM:
848 status = send_stored_km(hdcp, event_ctx, input);
849 break;
850 case D2_A1_VALIDATE_H_PRIME:
851 status = validate_h_prime(hdcp, event_ctx, input);
852 break;
853 case D2_A2_LOCALITY_CHECK:
854 status = locality_check(hdcp, event_ctx, input);
855 break;
856 case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
857 status = exchange_ks_and_test_for_repeater(hdcp,
858 event_ctx, input);
859 break;
860 case D2_SEND_CONTENT_STREAM_TYPE:
861 status = send_content_stream_type_dp(hdcp, event_ctx, input);
862 break;
863 case D2_ENABLE_ENCRYPTION:
864 status = enable_encryption(hdcp, event_ctx, input);
865 break;
866 case D2_A5_AUTHENTICATED:
867 status = authenticated(hdcp, event_ctx, input);
868 break;
869 case D2_A6_WAIT_FOR_RX_ID_LIST:
870 status = wait_for_rx_id_list(hdcp, event_ctx, input);
871 break;
872 case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
873 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
874 break;
875 case D2_A9_SEND_STREAM_MANAGEMENT:
876 status = send_stream_management(hdcp, event_ctx, input);
877 break;
878 case D2_A9_VALIDATE_STREAM_READY:
879 status = validate_stream_ready(hdcp, event_ctx, input);
880 break;
881 default:
882 status = MOD_HDCP_STATUS_INVALID_STATE;
883 break;
884 }
885
886 return status;
887}
888

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