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/debugfs.h>
27
28 #include "dc.h"
29 #include "amdgpu.h"
30 #include "amdgpu_dm.h"
31 #include "amdgpu_dm_debugfs.h"
32
33 /* function description
34 * get/ set DP configuration: lane_count, link_rate, spread_spectrum
35 *
36 * valid lane count value: 1, 2, 4
37 * valid link rate value:
38 * 06h = 1.62Gbps per lane
39 * 0Ah = 2.7Gbps per lane
40 * 0Ch = 3.24Gbps per lane
41 * 14h = 5.4Gbps per lane
42 * 1Eh = 8.1Gbps per lane
43 *
44 * debugfs is located at /sys/kernel/debug/dri/0/DP-x/link_settings
45 *
46 * --- to get dp configuration
47 *
48 * cat link_settings
49 *
50 * It will list current, verified, reported, preferred dp configuration.
51 * current -- for current video mode
52 * verified --- maximum configuration which pass link training
53 * reported --- DP rx report caps (DPCD register offset 0, 1 2)
54 * preferred --- user force settings
55 *
56 * --- set (or force) dp configuration
57 *
58 * echo <lane_count> <link_rate> > link_settings
59 *
60 * for example, to force to 2 lane, 2.7GHz,
61 * echo 4 0xa > link_settings
62 *
63 * spread_spectrum could not be changed dynamically.
64 *
65 * in case invalid lane count, link rate are force, no hw programming will be
66 * done. please check link settings after force operation to see if HW get
67 * programming.
68 *
69 * cat link_settings
70 *
71 * check current and preferred settings.
72 *
73 */
dp_link_settings_read(struct file * f,char __user * buf,size_t size,loff_t * pos)74 static ssize_t dp_link_settings_read(struct file *f, char __user *buf,
75 size_t size, loff_t *pos)
76 {
77 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
78 struct dc_link *link = connector->dc_link;
79 char *rd_buf = NULL;
80 char *rd_buf_ptr = NULL;
81 const uint32_t rd_buf_size = 100;
82 uint32_t result = 0;
83 uint8_t str_len = 0;
84 int r;
85
86 if (*pos & 3 || size & 3)
87 return -EINVAL;
88
89 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
90 if (!rd_buf)
91 return 0;
92
93 rd_buf_ptr = rd_buf;
94
95 str_len = strlen("Current: %d 0x%x %d ");
96 snprintf(rd_buf_ptr, str_len, "Current: %d 0x%x %d ",
97 link->cur_link_settings.lane_count,
98 link->cur_link_settings.link_rate,
99 link->cur_link_settings.link_spread);
100 rd_buf_ptr += str_len;
101
102 str_len = strlen("Verified: %d 0x%x %d ");
103 snprintf(rd_buf_ptr, str_len, "Verified: %d 0x%x %d ",
104 link->verified_link_cap.lane_count,
105 link->verified_link_cap.link_rate,
106 link->verified_link_cap.link_spread);
107 rd_buf_ptr += str_len;
108
109 str_len = strlen("Reported: %d 0x%x %d ");
110 snprintf(rd_buf_ptr, str_len, "Reported: %d 0x%x %d ",
111 link->reported_link_cap.lane_count,
112 link->reported_link_cap.link_rate,
113 link->reported_link_cap.link_spread);
114 rd_buf_ptr += str_len;
115
116 str_len = strlen("Preferred: %d 0x%x %d ");
117 snprintf(rd_buf_ptr, str_len, "Preferred: %d 0x%x %d\n",
118 link->preferred_link_setting.lane_count,
119 link->preferred_link_setting.link_rate,
120 link->preferred_link_setting.link_spread);
121
122 while (size) {
123 if (*pos >= rd_buf_size)
124 break;
125
126 r = put_user(*(rd_buf + result), buf);
127 if (r)
128 return r; /* r = -EFAULT */
129
130 buf += 1;
131 size -= 1;
132 *pos += 1;
133 result += 1;
134 }
135
136 kfree(rd_buf);
137 return result;
138 }
139
dp_link_settings_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)140 static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
141 size_t size, loff_t *pos)
142 {
143 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
144 struct dc_link *link = connector->dc_link;
145 struct dc *dc = (struct dc *)link->dc;
146 struct dc_link_settings prefer_link_settings;
147 char *wr_buf = NULL;
148 char *wr_buf_ptr = NULL;
149 const uint32_t wr_buf_size = 40;
150 int r;
151 int bytes_from_user;
152 char *sub_str;
153 /* 0: lane_count; 1: link_rate */
154 uint8_t param_index = 0;
155 long param[2];
156 const char delimiter[3] = {' ', '\n', '\0'};
157 bool valid_input = false;
158
159 if (size == 0)
160 return -EINVAL;
161
162 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
163 if (!wr_buf)
164 return -EINVAL;
165 wr_buf_ptr = wr_buf;
166
167 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size);
168
169 /* r is bytes not be copied */
170 if (r >= wr_buf_size) {
171 kfree(wr_buf);
172 DRM_DEBUG_DRIVER("user data not read\n");
173 return -EINVAL;
174 }
175
176 bytes_from_user = wr_buf_size - r;
177
178 while (isspace(*wr_buf_ptr))
179 wr_buf_ptr++;
180
181 while ((*wr_buf_ptr != '\0') && (param_index < 2)) {
182
183 sub_str = strsep(&wr_buf_ptr, delimiter);
184
185 r = kstrtol(sub_str, 16, ¶m[param_index]);
186
187 if (r)
188 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r);
189
190 param_index++;
191 while (isspace(*wr_buf_ptr))
192 wr_buf_ptr++;
193 }
194
195 switch (param[0]) {
196 case LANE_COUNT_ONE:
197 case LANE_COUNT_TWO:
198 case LANE_COUNT_FOUR:
199 valid_input = true;
200 break;
201 default:
202 break;
203 }
204
205 switch (param[1]) {
206 case LINK_RATE_LOW:
207 case LINK_RATE_HIGH:
208 case LINK_RATE_RBR2:
209 case LINK_RATE_HIGH2:
210 case LINK_RATE_HIGH3:
211 valid_input = true;
212 break;
213 default:
214 break;
215 }
216
217 if (!valid_input) {
218 kfree(wr_buf);
219 DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n");
220 return bytes_from_user;
221 }
222
223 /* save user force lane_count, link_rate to preferred settings
224 * spread spectrum will not be changed
225 */
226 prefer_link_settings.link_spread = link->cur_link_settings.link_spread;
227 prefer_link_settings.lane_count = param[0];
228 prefer_link_settings.link_rate = param[1];
229
230 dc_link_set_preferred_link_settings(dc, &prefer_link_settings, link);
231
232 kfree(wr_buf);
233 return bytes_from_user;
234 }
235
236 /* function: get current DP PHY settings: voltage swing, pre-emphasis,
237 * post-cursor2 (defined by VESA DP specification)
238 *
239 * valid values
240 * voltage swing: 0,1,2,3
241 * pre-emphasis : 0,1,2,3
242 * post cursor2 : 0,1,2,3
243 *
244 *
245 * how to use this debugfs
246 *
247 * debugfs is located at /sys/kernel/debug/dri/0/DP-x
248 *
249 * there will be directories, like DP-1, DP-2,DP-3, etc. for DP display
250 *
251 * To figure out which DP-x is the display for DP to be check,
252 * cd DP-x
253 * ls -ll
254 * There should be debugfs file, like link_settings, phy_settings.
255 * cat link_settings
256 * from lane_count, link_rate to figure which DP-x is for display to be worked
257 * on
258 *
259 * To get current DP PHY settings,
260 * cat phy_settings
261 *
262 * To change DP PHY settings,
263 * echo <voltage_swing> <pre-emphasis> <post_cursor2> > phy_settings
264 * for examle, to change voltage swing to 2, pre-emphasis to 3, post_cursor2 to
265 * 0,
266 * echo 2 3 0 > phy_settings
267 *
268 * To check if change be applied, get current phy settings by
269 * cat phy_settings
270 *
271 * In case invalid values are set by user, like
272 * echo 1 4 0 > phy_settings
273 *
274 * HW will NOT be programmed by these settings.
275 * cat phy_settings will show the previous valid settings.
276 */
dp_phy_settings_read(struct file * f,char __user * buf,size_t size,loff_t * pos)277 static ssize_t dp_phy_settings_read(struct file *f, char __user *buf,
278 size_t size, loff_t *pos)
279 {
280 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
281 struct dc_link *link = connector->dc_link;
282 char *rd_buf = NULL;
283 const uint32_t rd_buf_size = 20;
284 uint32_t result = 0;
285 int r;
286
287 if (*pos & 3 || size & 3)
288 return -EINVAL;
289
290 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
291 if (!rd_buf)
292 return -EINVAL;
293
294 snprintf(rd_buf, rd_buf_size, " %d %d %d ",
295 link->cur_lane_setting.VOLTAGE_SWING,
296 link->cur_lane_setting.PRE_EMPHASIS,
297 link->cur_lane_setting.POST_CURSOR2);
298
299 while (size) {
300 if (*pos >= rd_buf_size)
301 break;
302
303 r = put_user((*(rd_buf + result)), buf);
304 if (r)
305 return r; /* r = -EFAULT */
306
307 buf += 1;
308 size -= 1;
309 *pos += 1;
310 result += 1;
311 }
312
313 kfree(rd_buf);
314 return result;
315 }
316
dp_phy_settings_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)317 static ssize_t dp_phy_settings_write(struct file *f, const char __user *buf,
318 size_t size, loff_t *pos)
319 {
320 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
321 struct dc_link *link = connector->dc_link;
322 struct dc *dc = (struct dc *)link->dc;
323 char *wr_buf = NULL;
324 char *wr_buf_ptr = NULL;
325 uint32_t wr_buf_size = 40;
326 int r;
327 int bytes_from_user;
328 char *sub_str;
329 uint8_t param_index = 0;
330 long param[3];
331 const char delimiter[3] = {' ', '\n', '\0'};
332 bool use_prefer_link_setting;
333 struct link_training_settings link_lane_settings;
334
335 if (size == 0)
336 return 0;
337
338 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
339 if (!wr_buf)
340 return 0;
341 wr_buf_ptr = wr_buf;
342
343 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size);
344
345 /* r is bytes not be copied */
346 if (r >= wr_buf_size) {
347 kfree(wr_buf);
348 DRM_DEBUG_DRIVER("user data not be read\n");
349 return 0;
350 }
351
352 bytes_from_user = wr_buf_size - r;
353
354 while (isspace(*wr_buf_ptr))
355 wr_buf_ptr++;
356
357 while ((*wr_buf_ptr != '\0') && (param_index < 3)) {
358
359 sub_str = strsep(&wr_buf_ptr, delimiter);
360
361 r = kstrtol(sub_str, 16, ¶m[param_index]);
362
363 if (r)
364 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r);
365
366 param_index++;
367 while (isspace(*wr_buf_ptr))
368 wr_buf_ptr++;
369 }
370
371 if ((param[0] > VOLTAGE_SWING_MAX_LEVEL) ||
372 (param[1] > PRE_EMPHASIS_MAX_LEVEL) ||
373 (param[2] > POST_CURSOR2_MAX_LEVEL)) {
374 kfree(wr_buf);
375 DRM_DEBUG_DRIVER("Invalid Input No HW will be programmed\n");
376 return bytes_from_user;
377 }
378
379 /* get link settings: lane count, link rate */
380 use_prefer_link_setting =
381 ((link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) &&
382 (link->test_pattern_enabled));
383
384 memset(&link_lane_settings, 0, sizeof(link_lane_settings));
385
386 if (use_prefer_link_setting) {
387 link_lane_settings.link_settings.lane_count =
388 link->preferred_link_setting.lane_count;
389 link_lane_settings.link_settings.link_rate =
390 link->preferred_link_setting.link_rate;
391 link_lane_settings.link_settings.link_spread =
392 link->preferred_link_setting.link_spread;
393 } else {
394 link_lane_settings.link_settings.lane_count =
395 link->cur_link_settings.lane_count;
396 link_lane_settings.link_settings.link_rate =
397 link->cur_link_settings.link_rate;
398 link_lane_settings.link_settings.link_spread =
399 link->cur_link_settings.link_spread;
400 }
401
402 /* apply phy settings from user */
403 for (r = 0; r < link_lane_settings.link_settings.lane_count; r++) {
404 link_lane_settings.lane_settings[r].VOLTAGE_SWING =
405 (enum dc_voltage_swing) (param[0]);
406 link_lane_settings.lane_settings[r].PRE_EMPHASIS =
407 (enum dc_pre_emphasis) (param[1]);
408 link_lane_settings.lane_settings[r].POST_CURSOR2 =
409 (enum dc_post_cursor2) (param[2]);
410 }
411
412 /* program ASIC registers and DPCD registers */
413 dc_link_set_drive_settings(dc, &link_lane_settings, link);
414
415 kfree(wr_buf);
416 return bytes_from_user;
417 }
418
419 /* function description
420 *
421 * set PHY layer or Link layer test pattern
422 * PHY test pattern is used for PHY SI check.
423 * Link layer test will not affect PHY SI.
424 *
425 * Reset Test Pattern:
426 * 0 = DP_TEST_PATTERN_VIDEO_MODE
427 *
428 * PHY test pattern supported:
429 * 1 = DP_TEST_PATTERN_D102
430 * 2 = DP_TEST_PATTERN_SYMBOL_ERROR
431 * 3 = DP_TEST_PATTERN_PRBS7
432 * 4 = DP_TEST_PATTERN_80BIT_CUSTOM
433 * 5 = DP_TEST_PATTERN_CP2520_1
434 * 6 = DP_TEST_PATTERN_CP2520_2 = DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE
435 * 7 = DP_TEST_PATTERN_CP2520_3
436 *
437 * DP PHY Link Training Patterns
438 * 8 = DP_TEST_PATTERN_TRAINING_PATTERN1
439 * 9 = DP_TEST_PATTERN_TRAINING_PATTERN2
440 * a = DP_TEST_PATTERN_TRAINING_PATTERN3
441 * b = DP_TEST_PATTERN_TRAINING_PATTERN4
442 *
443 * DP Link Layer Test pattern
444 * c = DP_TEST_PATTERN_COLOR_SQUARES
445 * d = DP_TEST_PATTERN_COLOR_SQUARES_CEA
446 * e = DP_TEST_PATTERN_VERTICAL_BARS
447 * f = DP_TEST_PATTERN_HORIZONTAL_BARS
448 * 10= DP_TEST_PATTERN_COLOR_RAMP
449 *
450 * debugfs phy_test_pattern is located at /syskernel/debug/dri/0/DP-x
451 *
452 * --- set test pattern
453 * echo <test pattern #> > test_pattern
454 *
455 * If test pattern # is not supported, NO HW programming will be done.
456 * for DP_TEST_PATTERN_80BIT_CUSTOM, it needs extra 10 bytes of data
457 * for the user pattern. input 10 bytes data are separated by space
458 *
459 * echo 0x4 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 0x99 0xaa > test_pattern
460 *
461 * --- reset test pattern
462 * echo 0 > test_pattern
463 *
464 * --- HPD detection is disabled when set PHY test pattern
465 *
466 * when PHY test pattern (pattern # within [1,7]) is set, HPD pin of HW ASIC
467 * is disable. User could unplug DP display from DP connected and plug scope to
468 * check test pattern PHY SI.
469 * If there is need unplug scope and plug DP display back, do steps below:
470 * echo 0 > phy_test_pattern
471 * unplug scope
472 * plug DP display.
473 *
474 * "echo 0 > phy_test_pattern" will re-enable HPD pin again so that video sw
475 * driver could detect "unplug scope" and "plug DP display"
476 */
dp_phy_test_pattern_debugfs_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)477 static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __user *buf,
478 size_t size, loff_t *pos)
479 {
480 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
481 struct dc_link *link = connector->dc_link;
482 char *wr_buf = NULL;
483 char *wr_buf_ptr = NULL;
484 uint32_t wr_buf_size = 100;
485 uint32_t wr_buf_count = 0;
486 int r;
487 int bytes_from_user;
488 char *sub_str = NULL;
489 uint8_t param_index = 0;
490 uint8_t param_nums = 0;
491 long param[11] = {0x0};
492 const char delimiter[3] = {' ', '\n', '\0'};
493 enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
494 bool disable_hpd = false;
495 bool valid_test_pattern = false;
496 /* init with defalut 80bit custom pattern */
497 uint8_t custom_pattern[10] = {
498 0x1f, 0x7c, 0xf0, 0xc1, 0x07,
499 0x1f, 0x7c, 0xf0, 0xc1, 0x07
500 };
501 struct dc_link_settings prefer_link_settings = {LANE_COUNT_UNKNOWN,
502 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED};
503 struct dc_link_settings cur_link_settings = {LANE_COUNT_UNKNOWN,
504 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED};
505 struct link_training_settings link_training_settings;
506 int i;
507
508 if (size == 0)
509 return 0;
510
511 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
512 if (!wr_buf)
513 return 0;
514 wr_buf_ptr = wr_buf;
515
516 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size);
517
518 /* r is bytes not be copied */
519 if (r >= wr_buf_size) {
520 kfree(wr_buf);
521 DRM_DEBUG_DRIVER("user data not be read\n");
522 return 0;
523 }
524
525 bytes_from_user = wr_buf_size - r;
526
527 /* check number of parameters. isspace could not differ space and \n */
528 while ((*wr_buf_ptr != 0xa) && (wr_buf_count < wr_buf_size)) {
529 /* skip space*/
530 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) {
531 wr_buf_ptr++;
532 wr_buf_count++;
533 }
534
535 if (wr_buf_count == wr_buf_size)
536 break;
537
538 /* skip non-space*/
539 while ((!isspace(*wr_buf_ptr)) && (wr_buf_count < wr_buf_size)) {
540 wr_buf_ptr++;
541 wr_buf_count++;
542 }
543
544 param_nums++;
545
546 if (wr_buf_count == wr_buf_size)
547 break;
548 }
549
550 /* max 11 parameters */
551 if (param_nums > 11)
552 param_nums = 11;
553
554 wr_buf_ptr = wr_buf; /* reset buf pinter */
555 wr_buf_count = 0; /* number of char already checked */
556
557 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) {
558 wr_buf_ptr++;
559 wr_buf_count++;
560 }
561
562 while (param_index < param_nums) {
563 /* after strsep, wr_buf_ptr will be moved to after space */
564 sub_str = strsep(&wr_buf_ptr, delimiter);
565
566 r = kstrtol(sub_str, 16, ¶m[param_index]);
567
568 if (r)
569 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r);
570
571 param_index++;
572 }
573
574 test_pattern = param[0];
575
576 switch (test_pattern) {
577 case DP_TEST_PATTERN_VIDEO_MODE:
578 case DP_TEST_PATTERN_COLOR_SQUARES:
579 case DP_TEST_PATTERN_COLOR_SQUARES_CEA:
580 case DP_TEST_PATTERN_VERTICAL_BARS:
581 case DP_TEST_PATTERN_HORIZONTAL_BARS:
582 case DP_TEST_PATTERN_COLOR_RAMP:
583 valid_test_pattern = true;
584 break;
585
586 case DP_TEST_PATTERN_D102:
587 case DP_TEST_PATTERN_SYMBOL_ERROR:
588 case DP_TEST_PATTERN_PRBS7:
589 case DP_TEST_PATTERN_80BIT_CUSTOM:
590 case DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE:
591 case DP_TEST_PATTERN_TRAINING_PATTERN4:
592 disable_hpd = true;
593 valid_test_pattern = true;
594 break;
595
596 default:
597 valid_test_pattern = false;
598 test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
599 break;
600 }
601
602 if (!valid_test_pattern) {
603 kfree(wr_buf);
604 DRM_DEBUG_DRIVER("Invalid Test Pattern Parameters\n");
605 return bytes_from_user;
606 }
607
608 if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) {
609 for (i = 0; i < 10; i++) {
610 if ((uint8_t) param[i + 1] != 0x0)
611 break;
612 }
613
614 if (i < 10) {
615 /* not use default value */
616 for (i = 0; i < 10; i++)
617 custom_pattern[i] = (uint8_t) param[i + 1];
618 }
619 }
620
621 /* Usage: set DP physical test pattern using debugfs with normal DP
622 * panel. Then plug out DP panel and connect a scope to measure
623 * For normal video mode and test pattern generated from CRCT,
624 * they are visibile to user. So do not disable HPD.
625 * Video Mode is also set to clear the test pattern, so enable HPD
626 * because it might have been disabled after a test pattern was set.
627 * AUX depends on HPD * sequence dependent, do not move!
628 */
629 if (!disable_hpd)
630 dc_link_enable_hpd(link);
631
632 prefer_link_settings.lane_count = link->verified_link_cap.lane_count;
633 prefer_link_settings.link_rate = link->verified_link_cap.link_rate;
634 prefer_link_settings.link_spread = link->verified_link_cap.link_spread;
635
636 cur_link_settings.lane_count = link->cur_link_settings.lane_count;
637 cur_link_settings.link_rate = link->cur_link_settings.link_rate;
638 cur_link_settings.link_spread = link->cur_link_settings.link_spread;
639
640 link_training_settings.link_settings = cur_link_settings;
641
642
643 if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) {
644 if (prefer_link_settings.lane_count != LANE_COUNT_UNKNOWN &&
645 prefer_link_settings.link_rate != LINK_RATE_UNKNOWN &&
646 (prefer_link_settings.lane_count != cur_link_settings.lane_count ||
647 prefer_link_settings.link_rate != cur_link_settings.link_rate))
648 link_training_settings.link_settings = prefer_link_settings;
649 }
650
651 for (i = 0; i < (unsigned int)(link_training_settings.link_settings.lane_count); i++)
652 link_training_settings.lane_settings[i] = link->cur_lane_setting;
653
654 dc_link_set_test_pattern(
655 link,
656 test_pattern,
657 &link_training_settings,
658 custom_pattern,
659 10);
660
661 /* Usage: Set DP physical test pattern using AMDDP with normal DP panel
662 * Then plug out DP panel and connect a scope to measure DP PHY signal.
663 * Need disable interrupt to avoid SW driver disable DP output. This is
664 * done after the test pattern is set.
665 */
666 if (valid_test_pattern && disable_hpd)
667 dc_link_disable_hpd(link);
668
669 kfree(wr_buf);
670
671 return bytes_from_user;
672 }
673
674 static const struct file_operations dp_link_settings_debugfs_fops = {
675 .owner = THIS_MODULE,
676 .read = dp_link_settings_read,
677 .write = dp_link_settings_write,
678 .llseek = default_llseek
679 };
680
681 static const struct file_operations dp_phy_settings_debugfs_fop = {
682 .owner = THIS_MODULE,
683 .read = dp_phy_settings_read,
684 .write = dp_phy_settings_write,
685 .llseek = default_llseek
686 };
687
688 static const struct file_operations dp_phy_test_pattern_fops = {
689 .owner = THIS_MODULE,
690 .write = dp_phy_test_pattern_debugfs_write,
691 .llseek = default_llseek
692 };
693
694 static const struct {
695 char *name;
696 const struct file_operations *fops;
697 } dp_debugfs_entries[] = {
698 {"link_settings", &dp_link_settings_debugfs_fops},
699 {"phy_settings", &dp_phy_settings_debugfs_fop},
700 {"test_pattern", &dp_phy_test_pattern_fops}
701 };
702
connector_debugfs_init(struct amdgpu_dm_connector * connector)703 int connector_debugfs_init(struct amdgpu_dm_connector *connector)
704 {
705 int i;
706 struct dentry *ent, *dir = connector->base.debugfs_entry;
707
708 if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
709 for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
710 ent = debugfs_create_file(dp_debugfs_entries[i].name,
711 0644,
712 dir,
713 connector,
714 dp_debugfs_entries[i].fops);
715 if (IS_ERR(ent))
716 return PTR_ERR(ent);
717 }
718 }
719
720 return 0;
721 }
722
723