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/string_helpers.h>
27 #include <linux/uaccess.h>
28
29 #include "dc.h"
30 #include "amdgpu.h"
31 #include "amdgpu_dm.h"
32 #include "amdgpu_dm_debugfs.h"
33 #include "dm_helpers.h"
34 #include "dmub/dmub_srv.h"
35 #include "resource.h"
36 #include "dsc.h"
37 #include "link_hwss.h"
38 #include "dc/dc_dmub_srv.h"
39 #include "link/protocols/link_dp_capability.h"
40 #include "inc/hw/dchubbub.h"
41
42 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
43 #include "amdgpu_dm_psr.h"
44 #endif
45
46 struct dmub_debugfs_trace_header {
47 uint32_t entry_count;
48 uint32_t reserved[3];
49 };
50
51 struct dmub_debugfs_trace_entry {
52 uint32_t trace_code;
53 uint32_t tick_count;
54 uint32_t param0;
55 uint32_t param1;
56 };
57
58 static const char *const mst_progress_status[] = {
59 "probe",
60 "remote_edid",
61 "allocate_new_payload",
62 "clear_allocated_payload",
63 };
64
65 /* parse_write_buffer_into_params - Helper function to parse debugfs write buffer into an array
66 *
67 * Function takes in attributes passed to debugfs write entry
68 * and writes into param array.
69 * The user passes max_param_num to identify maximum number of
70 * parameters that could be parsed.
71 *
72 */
parse_write_buffer_into_params(char * wr_buf,uint32_t wr_buf_size,long * param,const char __user * buf,int max_param_num,uint8_t * param_nums)73 static int parse_write_buffer_into_params(char *wr_buf, uint32_t wr_buf_size,
74 long *param, const char __user *buf,
75 int max_param_num,
76 uint8_t *param_nums)
77 {
78 char *wr_buf_ptr = NULL;
79 uint32_t wr_buf_count = 0;
80 int r;
81 char *sub_str = NULL;
82 const char delimiter[3] = {' ', '\n', '\0'};
83 uint8_t param_index = 0;
84
85 *param_nums = 0;
86
87 wr_buf_ptr = wr_buf;
88
89 /* r is bytes not be copied */
90 if (copy_from_user(wr_buf_ptr, buf, wr_buf_size)) {
91 DRM_DEBUG_DRIVER("user data could not be read successfully\n");
92 return -EFAULT;
93 }
94
95 /* check number of parameters. isspace could not differ space and \n */
96 while ((*wr_buf_ptr != 0xa) && (wr_buf_count < wr_buf_size)) {
97 /* skip space*/
98 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) {
99 wr_buf_ptr++;
100 wr_buf_count++;
101 }
102
103 if (wr_buf_count == wr_buf_size)
104 break;
105
106 /* skip non-space*/
107 while ((!isspace(*wr_buf_ptr)) && (wr_buf_count < wr_buf_size)) {
108 wr_buf_ptr++;
109 wr_buf_count++;
110 }
111
112 (*param_nums)++;
113
114 if (wr_buf_count == wr_buf_size)
115 break;
116 }
117
118 if (*param_nums > max_param_num)
119 *param_nums = max_param_num;
120
121 wr_buf_ptr = wr_buf; /* reset buf pointer */
122 wr_buf_count = 0; /* number of char already checked */
123
124 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) {
125 wr_buf_ptr++;
126 wr_buf_count++;
127 }
128
129 while (param_index < *param_nums) {
130 /* after strsep, wr_buf_ptr will be moved to after space */
131 sub_str = strsep(&wr_buf_ptr, delimiter);
132
133 r = kstrtol(sub_str, 16, &(param[param_index]));
134
135 if (r)
136 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r);
137
138 param_index++;
139 }
140
141 return 0;
142 }
143
144 /* function description
145 * get/ set DP configuration: lane_count, link_rate, spread_spectrum
146 *
147 * valid lane count value: 1, 2, 4
148 * valid link rate value:
149 * 06h = 1.62Gbps per lane
150 * 0Ah = 2.7Gbps per lane
151 * 0Ch = 3.24Gbps per lane
152 * 14h = 5.4Gbps per lane
153 * 1Eh = 8.1Gbps per lane
154 *
155 * debugfs is located at /sys/kernel/debug/dri/0/DP-x/link_settings
156 *
157 * --- to get dp configuration
158 *
159 * cat /sys/kernel/debug/dri/0/DP-x/link_settings
160 *
161 * It will list current, verified, reported, preferred dp configuration.
162 * current -- for current video mode
163 * verified --- maximum configuration which pass link training
164 * reported --- DP rx report caps (DPCD register offset 0, 1 2)
165 * preferred --- user force settings
166 *
167 * --- set (or force) dp configuration
168 *
169 * echo <lane_count> <link_rate> > link_settings
170 *
171 * for example, to force to 2 lane, 2.7GHz,
172 * echo 4 0xa > /sys/kernel/debug/dri/0/DP-x/link_settings
173 *
174 * spread_spectrum could not be changed dynamically.
175 *
176 * in case invalid lane count, link rate are force, no hw programming will be
177 * done. please check link settings after force operation to see if HW get
178 * programming.
179 *
180 * cat /sys/kernel/debug/dri/0/DP-x/link_settings
181 *
182 * check current and preferred settings.
183 *
184 */
dp_link_settings_read(struct file * f,char __user * buf,size_t size,loff_t * pos)185 static ssize_t dp_link_settings_read(struct file *f, char __user *buf,
186 size_t size, loff_t *pos)
187 {
188 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
189 struct dc_link *link = connector->dc_link;
190 char *rd_buf = NULL;
191 char *rd_buf_ptr = NULL;
192 const uint32_t rd_buf_size = 100;
193 uint32_t result = 0;
194 uint8_t str_len = 0;
195 int r;
196
197 if (*pos & 3 || size & 3)
198 return -EINVAL;
199
200 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
201 if (!rd_buf)
202 return 0;
203
204 rd_buf_ptr = rd_buf;
205
206 str_len = strlen("Current: %d 0x%x %d ");
207 snprintf(rd_buf_ptr, str_len, "Current: %d 0x%x %d ",
208 link->cur_link_settings.lane_count,
209 link->cur_link_settings.link_rate,
210 link->cur_link_settings.link_spread);
211 rd_buf_ptr += str_len;
212
213 str_len = strlen("Verified: %d 0x%x %d ");
214 snprintf(rd_buf_ptr, str_len, "Verified: %d 0x%x %d ",
215 link->verified_link_cap.lane_count,
216 link->verified_link_cap.link_rate,
217 link->verified_link_cap.link_spread);
218 rd_buf_ptr += str_len;
219
220 str_len = strlen("Reported: %d 0x%x %d ");
221 snprintf(rd_buf_ptr, str_len, "Reported: %d 0x%x %d ",
222 link->reported_link_cap.lane_count,
223 link->reported_link_cap.link_rate,
224 link->reported_link_cap.link_spread);
225 rd_buf_ptr += str_len;
226
227 str_len = strlen("Preferred: %d 0x%x %d ");
228 snprintf(rd_buf_ptr, str_len, "Preferred: %d 0x%x %d\n",
229 link->preferred_link_setting.lane_count,
230 link->preferred_link_setting.link_rate,
231 link->preferred_link_setting.link_spread);
232
233 while (size) {
234 if (*pos >= rd_buf_size)
235 break;
236
237 r = put_user(*(rd_buf + result), buf);
238 if (r) {
239 kfree(rd_buf);
240 return r; /* r = -EFAULT */
241 }
242
243 buf += 1;
244 size -= 1;
245 *pos += 1;
246 result += 1;
247 }
248
249 kfree(rd_buf);
250 return result;
251 }
252
dp_link_settings_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)253 static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
254 size_t size, loff_t *pos)
255 {
256 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
257 struct dc_link *link = connector->dc_link;
258 struct amdgpu_device *adev = drm_to_adev(connector->base.dev);
259 struct dc *dc = (struct dc *)link->dc;
260 struct dc_link_settings prefer_link_settings;
261 char *wr_buf = NULL;
262 const uint32_t wr_buf_size = 40;
263 /* 0: lane_count; 1: link_rate */
264 int max_param_num = 2;
265 uint8_t param_nums = 0;
266 long param[2];
267 bool valid_input = true;
268
269 if (size == 0)
270 return -EINVAL;
271
272 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
273 if (!wr_buf)
274 return -ENOSPC;
275
276 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
277 (long *)param, buf,
278 max_param_num,
279 ¶m_nums)) {
280 kfree(wr_buf);
281 return -EINVAL;
282 }
283
284 if (param_nums <= 0) {
285 kfree(wr_buf);
286 DRM_DEBUG_DRIVER("user data not be read\n");
287 return -EINVAL;
288 }
289
290 switch (param[0]) {
291 case LANE_COUNT_ONE:
292 case LANE_COUNT_TWO:
293 case LANE_COUNT_FOUR:
294 break;
295 default:
296 valid_input = false;
297 break;
298 }
299
300 switch (param[1]) {
301 case LINK_RATE_LOW:
302 case LINK_RATE_HIGH:
303 case LINK_RATE_RBR2:
304 case LINK_RATE_HIGH2:
305 case LINK_RATE_HIGH3:
306 case LINK_RATE_UHBR10:
307 case LINK_RATE_UHBR13_5:
308 case LINK_RATE_UHBR20:
309 break;
310 default:
311 valid_input = false;
312 break;
313 }
314
315 if (!valid_input) {
316 kfree(wr_buf);
317 DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n");
318 mutex_lock(&adev->dm.dc_lock);
319 dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false);
320 mutex_unlock(&adev->dm.dc_lock);
321 return size;
322 }
323
324 /* save user force lane_count, link_rate to preferred settings
325 * spread spectrum will not be changed
326 */
327 prefer_link_settings.link_spread = link->cur_link_settings.link_spread;
328 prefer_link_settings.use_link_rate_set = false;
329 prefer_link_settings.lane_count = param[0];
330 prefer_link_settings.link_rate = param[1];
331
332 mutex_lock(&adev->dm.dc_lock);
333 dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, false);
334 mutex_unlock(&adev->dm.dc_lock);
335
336 kfree(wr_buf);
337 return size;
338 }
339
dp_mst_is_end_device(struct amdgpu_dm_connector * aconnector)340 static bool dp_mst_is_end_device(struct amdgpu_dm_connector *aconnector)
341 {
342 bool is_end_device = false;
343 struct drm_dp_mst_topology_mgr *mgr = NULL;
344 struct drm_dp_mst_port *port = NULL;
345
346 if (aconnector->mst_root && aconnector->mst_root->mst_mgr.mst_state) {
347 mgr = &aconnector->mst_root->mst_mgr;
348 port = aconnector->mst_output_port;
349
350 drm_modeset_lock(&mgr->base.lock, NULL);
351 if (port->pdt == DP_PEER_DEVICE_SST_SINK ||
352 port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV)
353 is_end_device = true;
354 drm_modeset_unlock(&mgr->base.lock);
355 }
356
357 return is_end_device;
358 }
359
360 /* Change MST link setting
361 *
362 * valid lane count value: 1, 2, 4
363 * valid link rate value:
364 * 06h = 1.62Gbps per lane
365 * 0Ah = 2.7Gbps per lane
366 * 0Ch = 3.24Gbps per lane
367 * 14h = 5.4Gbps per lane
368 * 1Eh = 8.1Gbps per lane
369 * 3E8h = 10.0Gbps per lane
370 * 546h = 13.5Gbps per lane
371 * 7D0h = 20.0Gbps per lane
372 *
373 * debugfs is located at /sys/kernel/debug/dri/0/DP-x/mst_link_settings
374 *
375 * for example, to force to 2 lane, 10.0GHz,
376 * echo 2 0x3e8 > /sys/kernel/debug/dri/0/DP-x/mst_link_settings
377 *
378 * Valid input will trigger hotplug event to get new link setting applied
379 * Invalid input will trigger training setting reset
380 *
381 * The usage can be referred to link_settings entry
382 *
383 */
dp_mst_link_setting(struct file * f,const char __user * buf,size_t size,loff_t * pos)384 static ssize_t dp_mst_link_setting(struct file *f, const char __user *buf,
385 size_t size, loff_t *pos)
386 {
387 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
388 struct dc_link *link = aconnector->dc_link;
389 struct amdgpu_device *adev = drm_to_adev(aconnector->base.dev);
390 struct dc *dc = (struct dc *)link->dc;
391 struct dc_link_settings prefer_link_settings;
392 char *wr_buf = NULL;
393 const uint32_t wr_buf_size = 40;
394 /* 0: lane_count; 1: link_rate */
395 int max_param_num = 2;
396 uint8_t param_nums = 0;
397 long param[2];
398 bool valid_input = true;
399
400 if (!dp_mst_is_end_device(aconnector))
401 return -EINVAL;
402
403 if (size == 0)
404 return -EINVAL;
405
406 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
407 if (!wr_buf)
408 return -ENOSPC;
409
410 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
411 (long *)param, buf,
412 max_param_num,
413 ¶m_nums)) {
414 kfree(wr_buf);
415 return -EINVAL;
416 }
417
418 if (param_nums <= 0) {
419 kfree(wr_buf);
420 DRM_DEBUG_DRIVER("user data not be read\n");
421 return -EINVAL;
422 }
423
424 switch (param[0]) {
425 case LANE_COUNT_ONE:
426 case LANE_COUNT_TWO:
427 case LANE_COUNT_FOUR:
428 break;
429 default:
430 valid_input = false;
431 break;
432 }
433
434 switch (param[1]) {
435 case LINK_RATE_LOW:
436 case LINK_RATE_HIGH:
437 case LINK_RATE_RBR2:
438 case LINK_RATE_HIGH2:
439 case LINK_RATE_HIGH3:
440 case LINK_RATE_UHBR10:
441 case LINK_RATE_UHBR13_5:
442 case LINK_RATE_UHBR20:
443 break;
444 default:
445 valid_input = false;
446 break;
447 }
448
449 if (!valid_input) {
450 kfree(wr_buf);
451 DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n");
452 mutex_lock(&adev->dm.dc_lock);
453 dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false);
454 mutex_unlock(&adev->dm.dc_lock);
455 return -EINVAL;
456 }
457
458 /* save user force lane_count, link_rate to preferred settings
459 * spread spectrum will not be changed
460 */
461 prefer_link_settings.link_spread = link->cur_link_settings.link_spread;
462 prefer_link_settings.use_link_rate_set = false;
463 prefer_link_settings.lane_count = param[0];
464 prefer_link_settings.link_rate = param[1];
465
466 /* skip immediate retrain, and train to new link setting after hotplug event triggered */
467 mutex_lock(&adev->dm.dc_lock);
468 dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, true);
469 mutex_unlock(&adev->dm.dc_lock);
470
471 mutex_lock(&aconnector->base.dev->mode_config.mutex);
472 aconnector->base.force = DRM_FORCE_OFF;
473 mutex_unlock(&aconnector->base.dev->mode_config.mutex);
474 drm_kms_helper_hotplug_event(aconnector->base.dev);
475
476 msleep(100);
477
478 mutex_lock(&aconnector->base.dev->mode_config.mutex);
479 aconnector->base.force = DRM_FORCE_UNSPECIFIED;
480 mutex_unlock(&aconnector->base.dev->mode_config.mutex);
481 drm_kms_helper_hotplug_event(aconnector->base.dev);
482
483 kfree(wr_buf);
484 return size;
485 }
486
487 /* function: get current DP PHY settings: voltage swing, pre-emphasis,
488 * post-cursor2 (defined by VESA DP specification)
489 *
490 * valid values
491 * voltage swing: 0,1,2,3
492 * pre-emphasis : 0,1,2,3
493 * post cursor2 : 0,1,2,3
494 *
495 *
496 * how to use this debugfs
497 *
498 * debugfs is located at /sys/kernel/debug/dri/0/DP-x
499 *
500 * there will be directories, like DP-1, DP-2,DP-3, etc. for DP display
501 *
502 * To figure out which DP-x is the display for DP to be check,
503 * cd DP-x
504 * ls -ll
505 * There should be debugfs file, like link_settings, phy_settings.
506 * cat link_settings
507 * from lane_count, link_rate to figure which DP-x is for display to be worked
508 * on
509 *
510 * To get current DP PHY settings,
511 * cat phy_settings
512 *
513 * To change DP PHY settings,
514 * echo <voltage_swing> <pre-emphasis> <post_cursor2> > phy_settings
515 * for examle, to change voltage swing to 2, pre-emphasis to 3, post_cursor2 to
516 * 0,
517 * echo 2 3 0 > phy_settings
518 *
519 * To check if change be applied, get current phy settings by
520 * cat phy_settings
521 *
522 * In case invalid values are set by user, like
523 * echo 1 4 0 > phy_settings
524 *
525 * HW will NOT be programmed by these settings.
526 * cat phy_settings will show the previous valid settings.
527 */
dp_phy_settings_read(struct file * f,char __user * buf,size_t size,loff_t * pos)528 static ssize_t dp_phy_settings_read(struct file *f, char __user *buf,
529 size_t size, loff_t *pos)
530 {
531 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
532 struct dc_link *link = connector->dc_link;
533 char *rd_buf = NULL;
534 const uint32_t rd_buf_size = 20;
535 uint32_t result = 0;
536 int r;
537
538 if (*pos & 3 || size & 3)
539 return -EINVAL;
540
541 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
542 if (!rd_buf)
543 return -EINVAL;
544
545 snprintf(rd_buf, rd_buf_size, " %d %d %d\n",
546 link->cur_lane_setting[0].VOLTAGE_SWING,
547 link->cur_lane_setting[0].PRE_EMPHASIS,
548 link->cur_lane_setting[0].POST_CURSOR2);
549
550 while (size) {
551 if (*pos >= rd_buf_size)
552 break;
553
554 r = put_user((*(rd_buf + result)), buf);
555 if (r) {
556 kfree(rd_buf);
557 return r; /* r = -EFAULT */
558 }
559
560 buf += 1;
561 size -= 1;
562 *pos += 1;
563 result += 1;
564 }
565
566 kfree(rd_buf);
567 return result;
568 }
569
dp_lttpr_status_show(struct seq_file * m,void * unused)570 static int dp_lttpr_status_show(struct seq_file *m, void *unused)
571 {
572 struct drm_connector *connector = m->private;
573 struct amdgpu_dm_connector *aconnector =
574 to_amdgpu_dm_connector(connector);
575 struct dc_lttpr_caps caps = aconnector->dc_link->dpcd_caps.lttpr_caps;
576
577 if (connector->status != connector_status_connected)
578 return -ENODEV;
579
580 seq_printf(m, "phy repeater count: %u (raw: 0x%x)\n",
581 dp_parse_lttpr_repeater_count(caps.phy_repeater_cnt),
582 caps.phy_repeater_cnt);
583
584 seq_puts(m, "phy repeater mode: ");
585
586 switch (caps.mode) {
587 case DP_PHY_REPEATER_MODE_TRANSPARENT:
588 seq_puts(m, "transparent");
589 break;
590 case DP_PHY_REPEATER_MODE_NON_TRANSPARENT:
591 seq_puts(m, "non-transparent");
592 break;
593 case 0x00:
594 seq_puts(m, "non lttpr");
595 break;
596 default:
597 seq_printf(m, "read error (raw: 0x%x)", caps.mode);
598 break;
599 }
600
601 seq_puts(m, "\n");
602 return 0;
603 }
604
dp_phy_settings_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)605 static ssize_t dp_phy_settings_write(struct file *f, const char __user *buf,
606 size_t size, loff_t *pos)
607 {
608 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
609 struct dc_link *link = connector->dc_link;
610 struct dc *dc = (struct dc *)link->dc;
611 char *wr_buf = NULL;
612 uint32_t wr_buf_size = 40;
613 long param[3];
614 bool use_prefer_link_setting;
615 struct link_training_settings link_lane_settings;
616 int max_param_num = 3;
617 uint8_t param_nums = 0;
618 int r = 0;
619
620
621 if (size == 0)
622 return -EINVAL;
623
624 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
625 if (!wr_buf)
626 return -ENOSPC;
627
628 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
629 (long *)param, buf,
630 max_param_num,
631 ¶m_nums)) {
632 kfree(wr_buf);
633 return -EINVAL;
634 }
635
636 if (param_nums <= 0) {
637 kfree(wr_buf);
638 DRM_DEBUG_DRIVER("user data not be read\n");
639 return -EINVAL;
640 }
641
642 if ((param[0] > VOLTAGE_SWING_MAX_LEVEL) ||
643 (param[1] > PRE_EMPHASIS_MAX_LEVEL) ||
644 (param[2] > POST_CURSOR2_MAX_LEVEL)) {
645 kfree(wr_buf);
646 DRM_DEBUG_DRIVER("Invalid Input No HW will be programmed\n");
647 return size;
648 }
649
650 /* get link settings: lane count, link rate */
651 use_prefer_link_setting =
652 ((link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) &&
653 (link->test_pattern_enabled));
654
655 memset(&link_lane_settings, 0, sizeof(link_lane_settings));
656
657 if (use_prefer_link_setting) {
658 link_lane_settings.link_settings.lane_count =
659 link->preferred_link_setting.lane_count;
660 link_lane_settings.link_settings.link_rate =
661 link->preferred_link_setting.link_rate;
662 link_lane_settings.link_settings.link_spread =
663 link->preferred_link_setting.link_spread;
664 } else {
665 link_lane_settings.link_settings.lane_count =
666 link->cur_link_settings.lane_count;
667 link_lane_settings.link_settings.link_rate =
668 link->cur_link_settings.link_rate;
669 link_lane_settings.link_settings.link_spread =
670 link->cur_link_settings.link_spread;
671 }
672
673 /* apply phy settings from user */
674 for (r = 0; r < link_lane_settings.link_settings.lane_count; r++) {
675 link_lane_settings.hw_lane_settings[r].VOLTAGE_SWING =
676 (enum dc_voltage_swing) (param[0]);
677 link_lane_settings.hw_lane_settings[r].PRE_EMPHASIS =
678 (enum dc_pre_emphasis) (param[1]);
679 link_lane_settings.hw_lane_settings[r].POST_CURSOR2 =
680 (enum dc_post_cursor2) (param[2]);
681 }
682
683 /* program ASIC registers and DPCD registers */
684 dc_link_set_drive_settings(dc, &link_lane_settings, link);
685
686 kfree(wr_buf);
687 return size;
688 }
689
690 /* function description
691 *
692 * set PHY layer or Link layer test pattern
693 * PHY test pattern is used for PHY SI check.
694 * Link layer test will not affect PHY SI.
695 *
696 * Reset Test Pattern:
697 * 0 = DP_TEST_PATTERN_VIDEO_MODE
698 *
699 * PHY test pattern supported:
700 * 1 = DP_TEST_PATTERN_D102
701 * 2 = DP_TEST_PATTERN_SYMBOL_ERROR
702 * 3 = DP_TEST_PATTERN_PRBS7
703 * 4 = DP_TEST_PATTERN_80BIT_CUSTOM
704 * 5 = DP_TEST_PATTERN_CP2520_1
705 * 6 = DP_TEST_PATTERN_CP2520_2 = DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE
706 * 7 = DP_TEST_PATTERN_CP2520_3
707 *
708 * DP PHY Link Training Patterns
709 * 8 = DP_TEST_PATTERN_TRAINING_PATTERN1
710 * 9 = DP_TEST_PATTERN_TRAINING_PATTERN2
711 * a = DP_TEST_PATTERN_TRAINING_PATTERN3
712 * b = DP_TEST_PATTERN_TRAINING_PATTERN4
713 *
714 * DP Link Layer Test pattern
715 * c = DP_TEST_PATTERN_COLOR_SQUARES
716 * d = DP_TEST_PATTERN_COLOR_SQUARES_CEA
717 * e = DP_TEST_PATTERN_VERTICAL_BARS
718 * f = DP_TEST_PATTERN_HORIZONTAL_BARS
719 * 10= DP_TEST_PATTERN_COLOR_RAMP
720 *
721 * debugfs phy_test_pattern is located at /syskernel/debug/dri/0/DP-x
722 *
723 * --- set test pattern
724 * echo <test pattern #> > test_pattern
725 *
726 * If test pattern # is not supported, NO HW programming will be done.
727 * for DP_TEST_PATTERN_80BIT_CUSTOM, it needs extra 10 bytes of data
728 * for the user pattern. input 10 bytes data are separated by space
729 *
730 * echo 0x4 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 0x99 0xaa > test_pattern
731 *
732 * --- reset test pattern
733 * echo 0 > test_pattern
734 *
735 * --- HPD detection is disabled when set PHY test pattern
736 *
737 * when PHY test pattern (pattern # within [1,7]) is set, HPD pin of HW ASIC
738 * is disable. User could unplug DP display from DP connected and plug scope to
739 * check test pattern PHY SI.
740 * If there is need unplug scope and plug DP display back, do steps below:
741 * echo 0 > phy_test_pattern
742 * unplug scope
743 * plug DP display.
744 *
745 * "echo 0 > phy_test_pattern" will re-enable HPD pin again so that video sw
746 * driver could detect "unplug scope" and "plug DP display"
747 */
dp_phy_test_pattern_debugfs_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)748 static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __user *buf,
749 size_t size, loff_t *pos)
750 {
751 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
752 struct dc_link *link = connector->dc_link;
753 char *wr_buf = NULL;
754 uint32_t wr_buf_size = 100;
755 long param[11] = {0x0};
756 int max_param_num = 11;
757 enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
758 bool disable_hpd = false;
759 bool valid_test_pattern = false;
760 uint8_t param_nums = 0;
761 /* init with default 80bit custom pattern */
762 uint8_t custom_pattern[10] = {
763 0x1f, 0x7c, 0xf0, 0xc1, 0x07,
764 0x1f, 0x7c, 0xf0, 0xc1, 0x07
765 };
766 struct dc_link_settings prefer_link_settings = {LANE_COUNT_UNKNOWN,
767 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED};
768 struct dc_link_settings cur_link_settings = {LANE_COUNT_UNKNOWN,
769 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED};
770 struct link_training_settings link_training_settings;
771 int i;
772
773 if (size == 0)
774 return -EINVAL;
775
776 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
777 if (!wr_buf)
778 return -ENOSPC;
779
780 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
781 (long *)param, buf,
782 max_param_num,
783 ¶m_nums)) {
784 kfree(wr_buf);
785 return -EINVAL;
786 }
787
788 if (param_nums <= 0) {
789 kfree(wr_buf);
790 DRM_DEBUG_DRIVER("user data not be read\n");
791 return -EINVAL;
792 }
793
794
795 test_pattern = param[0];
796
797 switch (test_pattern) {
798 case DP_TEST_PATTERN_VIDEO_MODE:
799 case DP_TEST_PATTERN_COLOR_SQUARES:
800 case DP_TEST_PATTERN_COLOR_SQUARES_CEA:
801 case DP_TEST_PATTERN_VERTICAL_BARS:
802 case DP_TEST_PATTERN_HORIZONTAL_BARS:
803 case DP_TEST_PATTERN_COLOR_RAMP:
804 valid_test_pattern = true;
805 break;
806
807 case DP_TEST_PATTERN_D102:
808 case DP_TEST_PATTERN_SYMBOL_ERROR:
809 case DP_TEST_PATTERN_PRBS7:
810 case DP_TEST_PATTERN_80BIT_CUSTOM:
811 case DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE:
812 case DP_TEST_PATTERN_TRAINING_PATTERN4:
813 disable_hpd = true;
814 valid_test_pattern = true;
815 break;
816
817 default:
818 valid_test_pattern = false;
819 test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
820 break;
821 }
822
823 if (!valid_test_pattern) {
824 kfree(wr_buf);
825 DRM_DEBUG_DRIVER("Invalid Test Pattern Parameters\n");
826 return size;
827 }
828
829 if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) {
830 for (i = 0; i < 10; i++) {
831 if ((uint8_t) param[i + 1] != 0x0)
832 break;
833 }
834
835 if (i < 10) {
836 /* not use default value */
837 for (i = 0; i < 10; i++)
838 custom_pattern[i] = (uint8_t) param[i + 1];
839 }
840 }
841
842 /* Usage: set DP physical test pattern using debugfs with normal DP
843 * panel. Then plug out DP panel and connect a scope to measure
844 * For normal video mode and test pattern generated from CRCT,
845 * they are visibile to user. So do not disable HPD.
846 * Video Mode is also set to clear the test pattern, so enable HPD
847 * because it might have been disabled after a test pattern was set.
848 * AUX depends on HPD * sequence dependent, do not move!
849 */
850 if (!disable_hpd)
851 dc_link_enable_hpd(link);
852
853 prefer_link_settings.lane_count = link->verified_link_cap.lane_count;
854 prefer_link_settings.link_rate = link->verified_link_cap.link_rate;
855 prefer_link_settings.link_spread = link->verified_link_cap.link_spread;
856
857 cur_link_settings.lane_count = link->cur_link_settings.lane_count;
858 cur_link_settings.link_rate = link->cur_link_settings.link_rate;
859 cur_link_settings.link_spread = link->cur_link_settings.link_spread;
860
861 link_training_settings.link_settings = cur_link_settings;
862
863
864 if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) {
865 if (prefer_link_settings.lane_count != LANE_COUNT_UNKNOWN &&
866 prefer_link_settings.link_rate != LINK_RATE_UNKNOWN &&
867 (prefer_link_settings.lane_count != cur_link_settings.lane_count ||
868 prefer_link_settings.link_rate != cur_link_settings.link_rate))
869 link_training_settings.link_settings = prefer_link_settings;
870 }
871
872 for (i = 0; i < (unsigned int)(link_training_settings.link_settings.lane_count); i++)
873 link_training_settings.hw_lane_settings[i] = link->cur_lane_setting[i];
874
875 dc_link_dp_set_test_pattern(
876 link,
877 test_pattern,
878 DP_TEST_PATTERN_COLOR_SPACE_RGB,
879 &link_training_settings,
880 custom_pattern,
881 10);
882
883 /* Usage: Set DP physical test pattern using AMDDP with normal DP panel
884 * Then plug out DP panel and connect a scope to measure DP PHY signal.
885 * Need disable interrupt to avoid SW driver disable DP output. This is
886 * done after the test pattern is set.
887 */
888 if (valid_test_pattern && disable_hpd)
889 dc_link_disable_hpd(link);
890
891 kfree(wr_buf);
892
893 return size;
894 }
895
896 /*
897 * Returns the DMCUB tracebuffer contents.
898 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_tracebuffer
899 */
dmub_tracebuffer_show(struct seq_file * m,void * data)900 static int dmub_tracebuffer_show(struct seq_file *m, void *data)
901 {
902 struct amdgpu_device *adev = m->private;
903 struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info;
904 struct dmub_debugfs_trace_entry *entries;
905 uint8_t *tbuf_base;
906 uint32_t tbuf_size, max_entries, num_entries, i;
907
908 if (!fb_info)
909 return 0;
910
911 tbuf_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].cpu_addr;
912 if (!tbuf_base)
913 return 0;
914
915 tbuf_size = fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].size;
916 max_entries = (tbuf_size - sizeof(struct dmub_debugfs_trace_header)) /
917 sizeof(struct dmub_debugfs_trace_entry);
918
919 num_entries =
920 ((struct dmub_debugfs_trace_header *)tbuf_base)->entry_count;
921
922 num_entries = min(num_entries, max_entries);
923
924 entries = (struct dmub_debugfs_trace_entry
925 *)(tbuf_base +
926 sizeof(struct dmub_debugfs_trace_header));
927
928 for (i = 0; i < num_entries; ++i) {
929 struct dmub_debugfs_trace_entry *entry = &entries[i];
930
931 seq_printf(m,
932 "trace_code=%u tick_count=%u param0=%u param1=%u\n",
933 entry->trace_code, entry->tick_count, entry->param0,
934 entry->param1);
935 }
936
937 return 0;
938 }
939
940 /*
941 * Returns the DMCUB firmware state contents.
942 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_fw_state
943 */
dmub_fw_state_show(struct seq_file * m,void * data)944 static int dmub_fw_state_show(struct seq_file *m, void *data)
945 {
946 struct amdgpu_device *adev = m->private;
947 struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info;
948 uint8_t *state_base;
949 uint32_t state_size;
950
951 if (!fb_info)
952 return 0;
953
954 state_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr;
955 if (!state_base)
956 return 0;
957
958 state_size = fb_info->fb[DMUB_WINDOW_6_FW_STATE].size;
959
960 return seq_write(m, state_base, state_size);
961 }
962
963 /* psr_capability_show() - show eDP panel PSR capability
964 *
965 * The read function: sink_psr_capability_show
966 * Shows if sink has PSR capability or not.
967 * If yes - the PSR version is appended
968 *
969 * cat /sys/kernel/debug/dri/0/eDP-X/psr_capability
970 *
971 * Expected output:
972 * "Sink support: no\n" - if panel doesn't support PSR
973 * "Sink support: yes [0x01]\n" - if panel supports PSR1
974 * "Driver support: no\n" - if driver doesn't support PSR
975 * "Driver support: yes [0x01]\n" - if driver supports PSR1
976 */
psr_capability_show(struct seq_file * m,void * data)977 static int psr_capability_show(struct seq_file *m, void *data)
978 {
979 struct drm_connector *connector = m->private;
980 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
981 struct dc_link *link = aconnector->dc_link;
982
983 if (!link)
984 return -ENODEV;
985
986 if (link->type == dc_connection_none)
987 return -ENODEV;
988
989 if (!(link->connector_signal & SIGNAL_TYPE_EDP))
990 return -ENODEV;
991
992 seq_printf(m, "Sink support: %s", str_yes_no(link->dpcd_caps.psr_info.psr_version != 0));
993 if (link->dpcd_caps.psr_info.psr_version)
994 seq_printf(m, " [0x%02x]", link->dpcd_caps.psr_info.psr_version);
995 seq_puts(m, "\n");
996
997 seq_printf(m, "Driver support: %s", str_yes_no(link->psr_settings.psr_feature_enabled));
998 if (link->psr_settings.psr_version)
999 seq_printf(m, " [0x%02x]", link->psr_settings.psr_version);
1000 seq_puts(m, "\n");
1001
1002 return 0;
1003 }
1004
1005 /*
1006 * Returns the current bpc for the crtc.
1007 * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_bpc
1008 */
amdgpu_current_bpc_show(struct seq_file * m,void * data)1009 static int amdgpu_current_bpc_show(struct seq_file *m, void *data)
1010 {
1011 struct drm_crtc *crtc = m->private;
1012 struct drm_device *dev = crtc->dev;
1013 struct dm_crtc_state *dm_crtc_state = NULL;
1014 int res = -ENODEV;
1015 unsigned int bpc;
1016
1017 mutex_lock(&dev->mode_config.mutex);
1018 drm_modeset_lock(&crtc->mutex, NULL);
1019 if (crtc->state == NULL)
1020 goto unlock;
1021
1022 dm_crtc_state = to_dm_crtc_state(crtc->state);
1023 if (dm_crtc_state->stream == NULL)
1024 goto unlock;
1025
1026 switch (dm_crtc_state->stream->timing.display_color_depth) {
1027 case COLOR_DEPTH_666:
1028 bpc = 6;
1029 break;
1030 case COLOR_DEPTH_888:
1031 bpc = 8;
1032 break;
1033 case COLOR_DEPTH_101010:
1034 bpc = 10;
1035 break;
1036 case COLOR_DEPTH_121212:
1037 bpc = 12;
1038 break;
1039 case COLOR_DEPTH_161616:
1040 bpc = 16;
1041 break;
1042 default:
1043 goto unlock;
1044 }
1045
1046 seq_printf(m, "Current: %u\n", bpc);
1047 res = 0;
1048
1049 unlock:
1050 drm_modeset_unlock(&crtc->mutex);
1051 mutex_unlock(&dev->mode_config.mutex);
1052
1053 return res;
1054 }
1055 DEFINE_SHOW_ATTRIBUTE(amdgpu_current_bpc);
1056
1057 /*
1058 * Returns the current colorspace for the crtc.
1059 * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_colorspace
1060 */
amdgpu_current_colorspace_show(struct seq_file * m,void * data)1061 static int amdgpu_current_colorspace_show(struct seq_file *m, void *data)
1062 {
1063 struct drm_crtc *crtc = m->private;
1064 struct drm_device *dev = crtc->dev;
1065 struct dm_crtc_state *dm_crtc_state = NULL;
1066 int res = -ENODEV;
1067
1068 mutex_lock(&dev->mode_config.mutex);
1069 drm_modeset_lock(&crtc->mutex, NULL);
1070 if (crtc->state == NULL)
1071 goto unlock;
1072
1073 dm_crtc_state = to_dm_crtc_state(crtc->state);
1074 if (dm_crtc_state->stream == NULL)
1075 goto unlock;
1076
1077 switch (dm_crtc_state->stream->output_color_space) {
1078 case COLOR_SPACE_SRGB:
1079 seq_puts(m, "sRGB");
1080 break;
1081 case COLOR_SPACE_YCBCR601:
1082 case COLOR_SPACE_YCBCR601_LIMITED:
1083 seq_puts(m, "BT601_YCC");
1084 break;
1085 case COLOR_SPACE_YCBCR709:
1086 case COLOR_SPACE_YCBCR709_LIMITED:
1087 seq_puts(m, "BT709_YCC");
1088 break;
1089 case COLOR_SPACE_ADOBERGB:
1090 seq_puts(m, "opRGB");
1091 break;
1092 case COLOR_SPACE_2020_RGB_FULLRANGE:
1093 seq_puts(m, "BT2020_RGB");
1094 break;
1095 case COLOR_SPACE_2020_YCBCR:
1096 seq_puts(m, "BT2020_YCC");
1097 break;
1098 default:
1099 goto unlock;
1100 }
1101 res = 0;
1102
1103 unlock:
1104 drm_modeset_unlock(&crtc->mutex);
1105 mutex_unlock(&dev->mode_config.mutex);
1106
1107 return res;
1108 }
1109 DEFINE_SHOW_ATTRIBUTE(amdgpu_current_colorspace);
1110
1111
1112 /*
1113 * Example usage:
1114 * Disable dsc passthrough, i.e.,: have dsc decoding at converver, not external RX
1115 * echo 1 /sys/kernel/debug/dri/0/DP-1/dsc_disable_passthrough
1116 * Enable dsc passthrough, i.e.,: have dsc passthrough to external RX
1117 * echo 0 /sys/kernel/debug/dri/0/DP-1/dsc_disable_passthrough
1118 */
dp_dsc_passthrough_set(struct file * f,const char __user * buf,size_t size,loff_t * pos)1119 static ssize_t dp_dsc_passthrough_set(struct file *f, const char __user *buf,
1120 size_t size, loff_t *pos)
1121 {
1122 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1123 char *wr_buf = NULL;
1124 uint32_t wr_buf_size = 42;
1125 int max_param_num = 1;
1126 long param;
1127 uint8_t param_nums = 0;
1128
1129 if (size == 0)
1130 return -EINVAL;
1131
1132 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1133
1134 if (!wr_buf) {
1135 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1136 return -ENOSPC;
1137 }
1138
1139 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1140 ¶m, buf,
1141 max_param_num,
1142 ¶m_nums)) {
1143 kfree(wr_buf);
1144 return -EINVAL;
1145 }
1146
1147 aconnector->dsc_settings.dsc_force_disable_passthrough = param;
1148
1149 kfree(wr_buf);
1150 return 0;
1151 }
1152
1153 /*
1154 * Returns the HDCP capability of the Display (1.4 for now).
1155 *
1156 * NOTE* Not all HDMI displays report their HDCP caps even when they are capable.
1157 * Since its rare for a display to not be HDCP 1.4 capable, we set HDMI as always capable.
1158 *
1159 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/hdcp_sink_capability
1160 * or cat /sys/kernel/debug/dri/0/HDMI-A-1/hdcp_sink_capability
1161 */
hdcp_sink_capability_show(struct seq_file * m,void * data)1162 static int hdcp_sink_capability_show(struct seq_file *m, void *data)
1163 {
1164 struct drm_connector *connector = m->private;
1165 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
1166 bool hdcp_cap, hdcp2_cap;
1167
1168 if (connector->status != connector_status_connected)
1169 return -ENODEV;
1170
1171 seq_printf(m, "%s:%d HDCP version: ", connector->name, connector->base.id);
1172
1173 hdcp_cap = dc_link_is_hdcp14(aconnector->dc_link, aconnector->dc_sink->sink_signal);
1174 hdcp2_cap = dc_link_is_hdcp22(aconnector->dc_link, aconnector->dc_sink->sink_signal);
1175
1176
1177 if (hdcp_cap)
1178 seq_printf(m, "%s ", "HDCP1.4");
1179 if (hdcp2_cap)
1180 seq_printf(m, "%s ", "HDCP2.2");
1181
1182 if (!hdcp_cap && !hdcp2_cap)
1183 seq_printf(m, "%s ", "None");
1184
1185 seq_puts(m, "\n");
1186
1187 return 0;
1188 }
1189
1190 /*
1191 * Returns whether the connected display is internal and not hotpluggable.
1192 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/internal_display
1193 */
internal_display_show(struct seq_file * m,void * data)1194 static int internal_display_show(struct seq_file *m, void *data)
1195 {
1196 struct drm_connector *connector = m->private;
1197 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
1198 struct dc_link *link = aconnector->dc_link;
1199
1200 seq_printf(m, "Internal: %u\n", link->is_internal_display);
1201
1202 return 0;
1203 }
1204
1205 /*
1206 * Returns the number of segments used if ODM Combine mode is enabled.
1207 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/odm_combine_segments
1208 */
odm_combine_segments_show(struct seq_file * m,void * unused)1209 static int odm_combine_segments_show(struct seq_file *m, void *unused)
1210 {
1211 struct drm_connector *connector = m->private;
1212 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
1213 struct dc_link *link = aconnector->dc_link;
1214 struct pipe_ctx *pipe_ctx = NULL;
1215 int i, segments = -EOPNOTSUPP;
1216
1217 for (i = 0; i < MAX_PIPES; i++) {
1218 pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];
1219 if (pipe_ctx->stream &&
1220 pipe_ctx->stream->link == link)
1221 break;
1222 }
1223
1224 if (connector->status != connector_status_connected)
1225 return -ENODEV;
1226
1227 if (pipe_ctx != NULL && pipe_ctx->stream_res.tg->funcs->get_odm_combine_segments)
1228 pipe_ctx->stream_res.tg->funcs->get_odm_combine_segments(pipe_ctx->stream_res.tg, &segments);
1229
1230 seq_printf(m, "%d\n", segments);
1231 return 0;
1232 }
1233
1234 /* function description
1235 *
1236 * generic SDP message access for testing
1237 *
1238 * debugfs sdp_message is located at /syskernel/debug/dri/0/DP-x
1239 *
1240 * SDP header
1241 * Hb0 : Secondary-Data Packet ID
1242 * Hb1 : Secondary-Data Packet type
1243 * Hb2 : Secondary-Data-packet-specific header, Byte 0
1244 * Hb3 : Secondary-Data-packet-specific header, Byte 1
1245 *
1246 * for using custom sdp message: input 4 bytes SDP header and 32 bytes raw data
1247 */
dp_sdp_message_debugfs_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)1248 static ssize_t dp_sdp_message_debugfs_write(struct file *f, const char __user *buf,
1249 size_t size, loff_t *pos)
1250 {
1251 int r;
1252 uint8_t data[36];
1253 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
1254 struct dm_crtc_state *acrtc_state;
1255 uint32_t write_size = 36;
1256
1257 if (connector->base.status != connector_status_connected)
1258 return -ENODEV;
1259
1260 if (size == 0)
1261 return 0;
1262
1263 acrtc_state = to_dm_crtc_state(connector->base.state->crtc->state);
1264
1265 r = copy_from_user(data, buf, write_size);
1266
1267 write_size -= r;
1268
1269 dc_stream_send_dp_sdp(acrtc_state->stream, data, write_size);
1270
1271 return write_size;
1272 }
1273
1274 /* function: Read link's DSC & FEC capabilities
1275 *
1276 *
1277 * Access it with the following command (you need to specify
1278 * connector like DP-1):
1279 *
1280 * cat /sys/kernel/debug/dri/0/DP-X/dp_dsc_fec_support
1281 *
1282 */
dp_dsc_fec_support_show(struct seq_file * m,void * data)1283 static int dp_dsc_fec_support_show(struct seq_file *m, void *data)
1284 {
1285 struct drm_connector *connector = m->private;
1286 struct drm_modeset_acquire_ctx ctx;
1287 struct drm_device *dev = connector->dev;
1288 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
1289 int ret = 0;
1290 bool try_again = false;
1291 bool is_fec_supported = false;
1292 bool is_dsc_supported = false;
1293 struct dpcd_caps dpcd_caps;
1294
1295 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1296 do {
1297 try_again = false;
1298 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
1299 if (ret) {
1300 if (ret == -EDEADLK) {
1301 ret = drm_modeset_backoff(&ctx);
1302 if (!ret) {
1303 try_again = true;
1304 continue;
1305 }
1306 }
1307 break;
1308 }
1309 if (connector->status != connector_status_connected) {
1310 ret = -ENODEV;
1311 break;
1312 }
1313 dpcd_caps = aconnector->dc_link->dpcd_caps;
1314 if (aconnector->mst_output_port) {
1315 /* aconnector sets dsc_aux during get_modes call
1316 * if MST connector has it means it can either
1317 * enable DSC on the sink device or on MST branch
1318 * its connected to.
1319 */
1320 if (aconnector->dsc_aux) {
1321 is_fec_supported = true;
1322 is_dsc_supported = true;
1323 }
1324 } else {
1325 is_fec_supported = dpcd_caps.fec_cap.raw & 0x1;
1326 is_dsc_supported = dpcd_caps.dsc_caps.dsc_basic_caps.raw[0] & 0x1;
1327 }
1328 } while (try_again);
1329
1330 drm_modeset_drop_locks(&ctx);
1331 drm_modeset_acquire_fini(&ctx);
1332
1333 seq_printf(m, "FEC_Sink_Support: %s\n", str_yes_no(is_fec_supported));
1334 seq_printf(m, "DSC_Sink_Support: %s\n", str_yes_no(is_dsc_supported));
1335
1336 return ret;
1337 }
1338
1339 /* function: Trigger virtual HPD redetection on connector
1340 *
1341 * This function will perform link rediscovery, link disable
1342 * and enable, and dm connector state update.
1343 *
1344 * Retrigger HPD on an existing connector by echoing 1 into
1345 * its respectful "trigger_hotplug" debugfs entry:
1346 *
1347 * echo 1 > /sys/kernel/debug/dri/0/DP-X/trigger_hotplug
1348 *
1349 * This function can perform HPD unplug:
1350 *
1351 * echo 0 > /sys/kernel/debug/dri/0/DP-X/trigger_hotplug
1352 *
1353 */
trigger_hotplug(struct file * f,const char __user * buf,size_t size,loff_t * pos)1354 static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
1355 size_t size, loff_t *pos)
1356 {
1357 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1358 struct drm_connector *connector = &aconnector->base;
1359 struct dc_link *link = NULL;
1360 struct drm_device *dev = connector->dev;
1361 struct amdgpu_device *adev = drm_to_adev(dev);
1362 enum dc_connection_type new_connection_type = dc_connection_none;
1363 char *wr_buf = NULL;
1364 uint32_t wr_buf_size = 42;
1365 int max_param_num = 1;
1366 long param[1] = {0};
1367 uint8_t param_nums = 0;
1368 bool ret = false;
1369
1370 if (!aconnector || !aconnector->dc_link)
1371 return -EINVAL;
1372
1373 if (size == 0)
1374 return -EINVAL;
1375
1376 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1377
1378 if (!wr_buf) {
1379 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1380 return -ENOSPC;
1381 }
1382
1383 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1384 (long *)param, buf,
1385 max_param_num,
1386 ¶m_nums)) {
1387 kfree(wr_buf);
1388 return -EINVAL;
1389 }
1390
1391 kfree(wr_buf);
1392
1393 if (param_nums <= 0) {
1394 DRM_DEBUG_DRIVER("user data not be read\n");
1395 return -EINVAL;
1396 }
1397
1398 mutex_lock(&aconnector->hpd_lock);
1399
1400 /* Don't support for mst end device*/
1401 if (aconnector->mst_root) {
1402 mutex_unlock(&aconnector->hpd_lock);
1403 return -EINVAL;
1404 }
1405
1406 if (param[0] == 1) {
1407
1408 if (!dc_link_detect_connection_type(aconnector->dc_link, &new_connection_type) &&
1409 new_connection_type != dc_connection_none)
1410 goto unlock;
1411
1412 mutex_lock(&adev->dm.dc_lock);
1413 ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
1414 mutex_unlock(&adev->dm.dc_lock);
1415
1416 if (!ret)
1417 goto unlock;
1418
1419 amdgpu_dm_update_connector_after_detect(aconnector);
1420
1421 drm_modeset_lock_all(dev);
1422 dm_restore_drm_connector_state(dev, connector);
1423 drm_modeset_unlock_all(dev);
1424
1425 drm_kms_helper_connector_hotplug_event(connector);
1426 } else if (param[0] == 0) {
1427 if (!aconnector->dc_link)
1428 goto unlock;
1429
1430 link = aconnector->dc_link;
1431
1432 if (link->local_sink) {
1433 dc_sink_release(link->local_sink);
1434 link->local_sink = NULL;
1435 }
1436
1437 link->dpcd_sink_count = 0;
1438 link->type = dc_connection_none;
1439 link->dongle_max_pix_clk = 0;
1440
1441 amdgpu_dm_update_connector_after_detect(aconnector);
1442
1443 /* If the aconnector is the root node in mst topology */
1444 if (aconnector->mst_mgr.mst_state == true)
1445 dc_link_reset_cur_dp_mst_topology(link);
1446
1447 drm_modeset_lock_all(dev);
1448 dm_restore_drm_connector_state(dev, connector);
1449 drm_modeset_unlock_all(dev);
1450
1451 drm_kms_helper_connector_hotplug_event(connector);
1452 }
1453
1454 unlock:
1455 mutex_unlock(&aconnector->hpd_lock);
1456
1457 return size;
1458 }
1459
1460 /* function: read DSC status on the connector
1461 *
1462 * The read function: dp_dsc_clock_en_read
1463 * returns current status of DSC clock on the connector.
1464 * The return is a boolean flag: 1 or 0.
1465 *
1466 * Access it with the following command (you need to specify
1467 * connector like DP-1):
1468 *
1469 * cat /sys/kernel/debug/dri/0/DP-X/dsc_clock_en
1470 *
1471 * Expected output:
1472 * 1 - means that DSC is currently enabled
1473 * 0 - means that DSC is disabled
1474 */
dp_dsc_clock_en_read(struct file * f,char __user * buf,size_t size,loff_t * pos)1475 static ssize_t dp_dsc_clock_en_read(struct file *f, char __user *buf,
1476 size_t size, loff_t *pos)
1477 {
1478 char *rd_buf = NULL;
1479 char *rd_buf_ptr = NULL;
1480 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1481 struct display_stream_compressor *dsc;
1482 struct dcn_dsc_state dsc_state = {0};
1483 const uint32_t rd_buf_size = 10;
1484 struct pipe_ctx *pipe_ctx;
1485 ssize_t result = 0;
1486 int i, r, str_len = 30;
1487
1488 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
1489
1490 if (!rd_buf)
1491 return -ENOMEM;
1492
1493 rd_buf_ptr = rd_buf;
1494
1495 for (i = 0; i < MAX_PIPES; i++) {
1496 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1497 if (pipe_ctx->stream &&
1498 pipe_ctx->stream->link == aconnector->dc_link)
1499 break;
1500 }
1501
1502 dsc = pipe_ctx->stream_res.dsc;
1503 if (dsc)
1504 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1505
1506 snprintf(rd_buf_ptr, str_len,
1507 "%d\n",
1508 dsc_state.dsc_clock_en);
1509 rd_buf_ptr += str_len;
1510
1511 while (size) {
1512 if (*pos >= rd_buf_size)
1513 break;
1514
1515 r = put_user(*(rd_buf + result), buf);
1516 if (r) {
1517 kfree(rd_buf);
1518 return r; /* r = -EFAULT */
1519 }
1520
1521 buf += 1;
1522 size -= 1;
1523 *pos += 1;
1524 result += 1;
1525 }
1526
1527 kfree(rd_buf);
1528 return result;
1529 }
1530
1531 /* function: write force DSC on the connector
1532 *
1533 * The write function: dp_dsc_clock_en_write
1534 * enables to force DSC on the connector.
1535 * User can write to either force enable or force disable DSC
1536 * on the next modeset or set it to driver default
1537 *
1538 * Accepted inputs:
1539 * 0 - default DSC enablement policy
1540 * 1 - force enable DSC on the connector
1541 * 2 - force disable DSC on the connector (might cause fail in atomic_check)
1542 *
1543 * Writing DSC settings is done with the following command:
1544 * - To force enable DSC (you need to specify
1545 * connector like DP-1):
1546 *
1547 * echo 0x1 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en
1548 *
1549 * - To return to default state set the flag to zero and
1550 * let driver deal with DSC automatically
1551 * (you need to specify connector like DP-1):
1552 *
1553 * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en
1554 *
1555 */
dp_dsc_clock_en_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)1556 static ssize_t dp_dsc_clock_en_write(struct file *f, const char __user *buf,
1557 size_t size, loff_t *pos)
1558 {
1559 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1560 struct drm_connector *connector = &aconnector->base;
1561 struct drm_device *dev = connector->dev;
1562 struct drm_crtc *crtc = NULL;
1563 struct dm_crtc_state *dm_crtc_state = NULL;
1564 struct pipe_ctx *pipe_ctx;
1565 int i;
1566 char *wr_buf = NULL;
1567 uint32_t wr_buf_size = 42;
1568 int max_param_num = 1;
1569 long param[1] = {0};
1570 uint8_t param_nums = 0;
1571
1572 if (size == 0)
1573 return -EINVAL;
1574
1575 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1576
1577 if (!wr_buf) {
1578 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1579 return -ENOSPC;
1580 }
1581
1582 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1583 (long *)param, buf,
1584 max_param_num,
1585 ¶m_nums)) {
1586 kfree(wr_buf);
1587 return -EINVAL;
1588 }
1589
1590 if (param_nums <= 0) {
1591 DRM_DEBUG_DRIVER("user data not be read\n");
1592 kfree(wr_buf);
1593 return -EINVAL;
1594 }
1595
1596 for (i = 0; i < MAX_PIPES; i++) {
1597 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1598 if (pipe_ctx->stream &&
1599 pipe_ctx->stream->link == aconnector->dc_link)
1600 break;
1601 }
1602
1603 if (!pipe_ctx->stream)
1604 goto done;
1605
1606 // Get CRTC state
1607 mutex_lock(&dev->mode_config.mutex);
1608 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1609
1610 if (connector->state == NULL)
1611 goto unlock;
1612
1613 crtc = connector->state->crtc;
1614 if (crtc == NULL)
1615 goto unlock;
1616
1617 drm_modeset_lock(&crtc->mutex, NULL);
1618 if (crtc->state == NULL)
1619 goto unlock;
1620
1621 dm_crtc_state = to_dm_crtc_state(crtc->state);
1622 if (dm_crtc_state->stream == NULL)
1623 goto unlock;
1624
1625 if (param[0] == 1)
1626 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_ENABLE;
1627 else if (param[0] == 2)
1628 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DISABLE;
1629 else
1630 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DEFAULT;
1631
1632 dm_crtc_state->dsc_force_changed = true;
1633
1634 unlock:
1635 if (crtc)
1636 drm_modeset_unlock(&crtc->mutex);
1637 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1638 mutex_unlock(&dev->mode_config.mutex);
1639
1640 done:
1641 kfree(wr_buf);
1642 return size;
1643 }
1644
1645 /* function: read DSC slice width parameter on the connector
1646 *
1647 * The read function: dp_dsc_slice_width_read
1648 * returns dsc slice width used in the current configuration
1649 * The return is an integer: 0 or other positive number
1650 *
1651 * Access the status with the following command:
1652 *
1653 * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1654 *
1655 * 0 - means that DSC is disabled
1656 *
1657 * Any other number more than zero represents the
1658 * slice width currently used by DSC in pixels
1659 *
1660 */
dp_dsc_slice_width_read(struct file * f,char __user * buf,size_t size,loff_t * pos)1661 static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf,
1662 size_t size, loff_t *pos)
1663 {
1664 char *rd_buf = NULL;
1665 char *rd_buf_ptr = NULL;
1666 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1667 struct display_stream_compressor *dsc;
1668 struct dcn_dsc_state dsc_state = {0};
1669 const uint32_t rd_buf_size = 100;
1670 struct pipe_ctx *pipe_ctx;
1671 ssize_t result = 0;
1672 int i, r, str_len = 30;
1673
1674 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
1675
1676 if (!rd_buf)
1677 return -ENOMEM;
1678
1679 rd_buf_ptr = rd_buf;
1680
1681 for (i = 0; i < MAX_PIPES; i++) {
1682 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1683 if (pipe_ctx->stream &&
1684 pipe_ctx->stream->link == aconnector->dc_link)
1685 break;
1686 }
1687
1688 dsc = pipe_ctx->stream_res.dsc;
1689 if (dsc)
1690 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1691
1692 snprintf(rd_buf_ptr, str_len,
1693 "%d\n",
1694 dsc_state.dsc_slice_width);
1695 rd_buf_ptr += str_len;
1696
1697 while (size) {
1698 if (*pos >= rd_buf_size)
1699 break;
1700
1701 r = put_user(*(rd_buf + result), buf);
1702 if (r) {
1703 kfree(rd_buf);
1704 return r; /* r = -EFAULT */
1705 }
1706
1707 buf += 1;
1708 size -= 1;
1709 *pos += 1;
1710 result += 1;
1711 }
1712
1713 kfree(rd_buf);
1714 return result;
1715 }
1716
1717 /* function: write DSC slice width parameter
1718 *
1719 * The write function: dp_dsc_slice_width_write
1720 * overwrites automatically generated DSC configuration
1721 * of slice width.
1722 *
1723 * The user has to write the slice width divisible by the
1724 * picture width.
1725 *
1726 * Also the user has to write width in hexidecimal
1727 * rather than in decimal.
1728 *
1729 * Writing DSC settings is done with the following command:
1730 * - To force overwrite slice width: (example sets to 1920 pixels)
1731 *
1732 * echo 0x780 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1733 *
1734 * - To stop overwriting and let driver find the optimal size,
1735 * set the width to zero:
1736 *
1737 * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1738 *
1739 */
dp_dsc_slice_width_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)1740 static ssize_t dp_dsc_slice_width_write(struct file *f, const char __user *buf,
1741 size_t size, loff_t *pos)
1742 {
1743 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1744 struct pipe_ctx *pipe_ctx;
1745 struct drm_connector *connector = &aconnector->base;
1746 struct drm_device *dev = connector->dev;
1747 struct drm_crtc *crtc = NULL;
1748 struct dm_crtc_state *dm_crtc_state = NULL;
1749 int i;
1750 char *wr_buf = NULL;
1751 uint32_t wr_buf_size = 42;
1752 int max_param_num = 1;
1753 long param[1] = {0};
1754 uint8_t param_nums = 0;
1755
1756 if (size == 0)
1757 return -EINVAL;
1758
1759 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1760
1761 if (!wr_buf) {
1762 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1763 return -ENOSPC;
1764 }
1765
1766 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1767 (long *)param, buf,
1768 max_param_num,
1769 ¶m_nums)) {
1770 kfree(wr_buf);
1771 return -EINVAL;
1772 }
1773
1774 if (param_nums <= 0) {
1775 DRM_DEBUG_DRIVER("user data not be read\n");
1776 kfree(wr_buf);
1777 return -EINVAL;
1778 }
1779
1780 for (i = 0; i < MAX_PIPES; i++) {
1781 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1782 if (pipe_ctx->stream &&
1783 pipe_ctx->stream->link == aconnector->dc_link)
1784 break;
1785 }
1786
1787 if (!pipe_ctx->stream)
1788 goto done;
1789
1790 // Safely get CRTC state
1791 mutex_lock(&dev->mode_config.mutex);
1792 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1793
1794 if (connector->state == NULL)
1795 goto unlock;
1796
1797 crtc = connector->state->crtc;
1798 if (crtc == NULL)
1799 goto unlock;
1800
1801 drm_modeset_lock(&crtc->mutex, NULL);
1802 if (crtc->state == NULL)
1803 goto unlock;
1804
1805 dm_crtc_state = to_dm_crtc_state(crtc->state);
1806 if (dm_crtc_state->stream == NULL)
1807 goto unlock;
1808
1809 if (param[0] > 0)
1810 aconnector->dsc_settings.dsc_num_slices_h = DIV_ROUND_UP(
1811 pipe_ctx->stream->timing.h_addressable,
1812 param[0]);
1813 else
1814 aconnector->dsc_settings.dsc_num_slices_h = 0;
1815
1816 dm_crtc_state->dsc_force_changed = true;
1817
1818 unlock:
1819 if (crtc)
1820 drm_modeset_unlock(&crtc->mutex);
1821 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1822 mutex_unlock(&dev->mode_config.mutex);
1823
1824 done:
1825 kfree(wr_buf);
1826 return size;
1827 }
1828
1829 /* function: read DSC slice height parameter on the connector
1830 *
1831 * The read function: dp_dsc_slice_height_read
1832 * returns dsc slice height used in the current configuration
1833 * The return is an integer: 0 or other positive number
1834 *
1835 * Access the status with the following command:
1836 *
1837 * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1838 *
1839 * 0 - means that DSC is disabled
1840 *
1841 * Any other number more than zero represents the
1842 * slice height currently used by DSC in pixels
1843 *
1844 */
dp_dsc_slice_height_read(struct file * f,char __user * buf,size_t size,loff_t * pos)1845 static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf,
1846 size_t size, loff_t *pos)
1847 {
1848 char *rd_buf = NULL;
1849 char *rd_buf_ptr = NULL;
1850 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1851 struct display_stream_compressor *dsc;
1852 struct dcn_dsc_state dsc_state = {0};
1853 const uint32_t rd_buf_size = 100;
1854 struct pipe_ctx *pipe_ctx;
1855 ssize_t result = 0;
1856 int i, r, str_len = 30;
1857
1858 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
1859
1860 if (!rd_buf)
1861 return -ENOMEM;
1862
1863 rd_buf_ptr = rd_buf;
1864
1865 for (i = 0; i < MAX_PIPES; i++) {
1866 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1867 if (pipe_ctx->stream &&
1868 pipe_ctx->stream->link == aconnector->dc_link)
1869 break;
1870 }
1871
1872 dsc = pipe_ctx->stream_res.dsc;
1873 if (dsc)
1874 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1875
1876 snprintf(rd_buf_ptr, str_len,
1877 "%d\n",
1878 dsc_state.dsc_slice_height);
1879 rd_buf_ptr += str_len;
1880
1881 while (size) {
1882 if (*pos >= rd_buf_size)
1883 break;
1884
1885 r = put_user(*(rd_buf + result), buf);
1886 if (r) {
1887 kfree(rd_buf);
1888 return r; /* r = -EFAULT */
1889 }
1890
1891 buf += 1;
1892 size -= 1;
1893 *pos += 1;
1894 result += 1;
1895 }
1896
1897 kfree(rd_buf);
1898 return result;
1899 }
1900
1901 /* function: write DSC slice height parameter
1902 *
1903 * The write function: dp_dsc_slice_height_write
1904 * overwrites automatically generated DSC configuration
1905 * of slice height.
1906 *
1907 * The user has to write the slice height divisible by the
1908 * picture height.
1909 *
1910 * Also the user has to write height in hexidecimal
1911 * rather than in decimal.
1912 *
1913 * Writing DSC settings is done with the following command:
1914 * - To force overwrite slice height (example sets to 128 pixels):
1915 *
1916 * echo 0x80 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1917 *
1918 * - To stop overwriting and let driver find the optimal size,
1919 * set the height to zero:
1920 *
1921 * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1922 *
1923 */
dp_dsc_slice_height_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)1924 static ssize_t dp_dsc_slice_height_write(struct file *f, const char __user *buf,
1925 size_t size, loff_t *pos)
1926 {
1927 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1928 struct drm_connector *connector = &aconnector->base;
1929 struct drm_device *dev = connector->dev;
1930 struct drm_crtc *crtc = NULL;
1931 struct dm_crtc_state *dm_crtc_state = NULL;
1932 struct pipe_ctx *pipe_ctx;
1933 int i;
1934 char *wr_buf = NULL;
1935 uint32_t wr_buf_size = 42;
1936 int max_param_num = 1;
1937 uint8_t param_nums = 0;
1938 long param[1] = {0};
1939
1940 if (size == 0)
1941 return -EINVAL;
1942
1943 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1944
1945 if (!wr_buf) {
1946 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1947 return -ENOSPC;
1948 }
1949
1950 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1951 (long *)param, buf,
1952 max_param_num,
1953 ¶m_nums)) {
1954 kfree(wr_buf);
1955 return -EINVAL;
1956 }
1957
1958 if (param_nums <= 0) {
1959 DRM_DEBUG_DRIVER("user data not be read\n");
1960 kfree(wr_buf);
1961 return -EINVAL;
1962 }
1963
1964 for (i = 0; i < MAX_PIPES; i++) {
1965 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1966 if (pipe_ctx->stream &&
1967 pipe_ctx->stream->link == aconnector->dc_link)
1968 break;
1969 }
1970
1971 if (!pipe_ctx->stream)
1972 goto done;
1973
1974 // Get CRTC state
1975 mutex_lock(&dev->mode_config.mutex);
1976 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1977
1978 if (connector->state == NULL)
1979 goto unlock;
1980
1981 crtc = connector->state->crtc;
1982 if (crtc == NULL)
1983 goto unlock;
1984
1985 drm_modeset_lock(&crtc->mutex, NULL);
1986 if (crtc->state == NULL)
1987 goto unlock;
1988
1989 dm_crtc_state = to_dm_crtc_state(crtc->state);
1990 if (dm_crtc_state->stream == NULL)
1991 goto unlock;
1992
1993 if (param[0] > 0)
1994 aconnector->dsc_settings.dsc_num_slices_v = DIV_ROUND_UP(
1995 pipe_ctx->stream->timing.v_addressable,
1996 param[0]);
1997 else
1998 aconnector->dsc_settings.dsc_num_slices_v = 0;
1999
2000 dm_crtc_state->dsc_force_changed = true;
2001
2002 unlock:
2003 if (crtc)
2004 drm_modeset_unlock(&crtc->mutex);
2005 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2006 mutex_unlock(&dev->mode_config.mutex);
2007
2008 done:
2009 kfree(wr_buf);
2010 return size;
2011 }
2012
2013 /* function: read DSC target rate on the connector in bits per pixel
2014 *
2015 * The read function: dp_dsc_bits_per_pixel_read
2016 * returns target rate of compression in bits per pixel
2017 * The return is an integer: 0 or other positive integer
2018 *
2019 * Access it with the following command:
2020 *
2021 * cat /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2022 *
2023 * 0 - means that DSC is disabled
2024 */
dp_dsc_bits_per_pixel_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2025 static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf,
2026 size_t size, loff_t *pos)
2027 {
2028 char *rd_buf = NULL;
2029 char *rd_buf_ptr = NULL;
2030 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2031 struct display_stream_compressor *dsc;
2032 struct dcn_dsc_state dsc_state = {0};
2033 const uint32_t rd_buf_size = 100;
2034 struct pipe_ctx *pipe_ctx;
2035 ssize_t result = 0;
2036 int i, r, str_len = 30;
2037
2038 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2039
2040 if (!rd_buf)
2041 return -ENOMEM;
2042
2043 rd_buf_ptr = rd_buf;
2044
2045 for (i = 0; i < MAX_PIPES; i++) {
2046 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2047 if (pipe_ctx->stream &&
2048 pipe_ctx->stream->link == aconnector->dc_link)
2049 break;
2050 }
2051
2052 dsc = pipe_ctx->stream_res.dsc;
2053 if (dsc)
2054 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2055
2056 snprintf(rd_buf_ptr, str_len,
2057 "%d\n",
2058 dsc_state.dsc_bits_per_pixel);
2059 rd_buf_ptr += str_len;
2060
2061 while (size) {
2062 if (*pos >= rd_buf_size)
2063 break;
2064
2065 r = put_user(*(rd_buf + result), buf);
2066 if (r) {
2067 kfree(rd_buf);
2068 return r; /* r = -EFAULT */
2069 }
2070
2071 buf += 1;
2072 size -= 1;
2073 *pos += 1;
2074 result += 1;
2075 }
2076
2077 kfree(rd_buf);
2078 return result;
2079 }
2080
2081 /* function: write DSC target rate in bits per pixel
2082 *
2083 * The write function: dp_dsc_bits_per_pixel_write
2084 * overwrites automatically generated DSC configuration
2085 * of DSC target bit rate.
2086 *
2087 * Also the user has to write bpp in hexidecimal
2088 * rather than in decimal.
2089 *
2090 * Writing DSC settings is done with the following command:
2091 * - To force overwrite rate (example sets to 256 bpp x 1/16):
2092 *
2093 * echo 0x100 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2094 *
2095 * - To stop overwriting and let driver find the optimal rate,
2096 * set the rate to zero:
2097 *
2098 * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2099 *
2100 */
dp_dsc_bits_per_pixel_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)2101 static ssize_t dp_dsc_bits_per_pixel_write(struct file *f, const char __user *buf,
2102 size_t size, loff_t *pos)
2103 {
2104 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2105 struct drm_connector *connector = &aconnector->base;
2106 struct drm_device *dev = connector->dev;
2107 struct drm_crtc *crtc = NULL;
2108 struct dm_crtc_state *dm_crtc_state = NULL;
2109 struct pipe_ctx *pipe_ctx;
2110 int i;
2111 char *wr_buf = NULL;
2112 uint32_t wr_buf_size = 42;
2113 int max_param_num = 1;
2114 uint8_t param_nums = 0;
2115 long param[1] = {0};
2116
2117 if (size == 0)
2118 return -EINVAL;
2119
2120 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
2121
2122 if (!wr_buf) {
2123 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
2124 return -ENOSPC;
2125 }
2126
2127 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
2128 (long *)param, buf,
2129 max_param_num,
2130 ¶m_nums)) {
2131 kfree(wr_buf);
2132 return -EINVAL;
2133 }
2134
2135 if (param_nums <= 0) {
2136 DRM_DEBUG_DRIVER("user data not be read\n");
2137 kfree(wr_buf);
2138 return -EINVAL;
2139 }
2140
2141 for (i = 0; i < MAX_PIPES; i++) {
2142 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2143 if (pipe_ctx->stream &&
2144 pipe_ctx->stream->link == aconnector->dc_link)
2145 break;
2146 }
2147
2148 if (!pipe_ctx->stream)
2149 goto done;
2150
2151 // Get CRTC state
2152 mutex_lock(&dev->mode_config.mutex);
2153 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2154
2155 if (connector->state == NULL)
2156 goto unlock;
2157
2158 crtc = connector->state->crtc;
2159 if (crtc == NULL)
2160 goto unlock;
2161
2162 drm_modeset_lock(&crtc->mutex, NULL);
2163 if (crtc->state == NULL)
2164 goto unlock;
2165
2166 dm_crtc_state = to_dm_crtc_state(crtc->state);
2167 if (dm_crtc_state->stream == NULL)
2168 goto unlock;
2169
2170 aconnector->dsc_settings.dsc_bits_per_pixel = param[0];
2171
2172 dm_crtc_state->dsc_force_changed = true;
2173
2174 unlock:
2175 if (crtc)
2176 drm_modeset_unlock(&crtc->mutex);
2177 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2178 mutex_unlock(&dev->mode_config.mutex);
2179
2180 done:
2181 kfree(wr_buf);
2182 return size;
2183 }
2184
2185 /* function: read DSC picture width parameter on the connector
2186 *
2187 * The read function: dp_dsc_pic_width_read
2188 * returns dsc picture width used in the current configuration
2189 * It is the same as h_addressable of the current
2190 * display's timing
2191 * The return is an integer: 0 or other positive integer
2192 * If 0 then DSC is disabled.
2193 *
2194 * Access it with the following command:
2195 *
2196 * cat /sys/kernel/debug/dri/0/DP-X/dsc_pic_width
2197 *
2198 * 0 - means that DSC is disabled
2199 */
dp_dsc_pic_width_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2200 static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf,
2201 size_t size, loff_t *pos)
2202 {
2203 char *rd_buf = NULL;
2204 char *rd_buf_ptr = NULL;
2205 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2206 struct display_stream_compressor *dsc;
2207 struct dcn_dsc_state dsc_state = {0};
2208 const uint32_t rd_buf_size = 100;
2209 struct pipe_ctx *pipe_ctx;
2210 ssize_t result = 0;
2211 int i, r, str_len = 30;
2212
2213 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2214
2215 if (!rd_buf)
2216 return -ENOMEM;
2217
2218 rd_buf_ptr = rd_buf;
2219
2220 for (i = 0; i < MAX_PIPES; i++) {
2221 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2222 if (pipe_ctx->stream &&
2223 pipe_ctx->stream->link == aconnector->dc_link)
2224 break;
2225 }
2226
2227 dsc = pipe_ctx->stream_res.dsc;
2228 if (dsc)
2229 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2230
2231 snprintf(rd_buf_ptr, str_len,
2232 "%d\n",
2233 dsc_state.dsc_pic_width);
2234 rd_buf_ptr += str_len;
2235
2236 while (size) {
2237 if (*pos >= rd_buf_size)
2238 break;
2239
2240 r = put_user(*(rd_buf + result), buf);
2241 if (r) {
2242 kfree(rd_buf);
2243 return r; /* r = -EFAULT */
2244 }
2245
2246 buf += 1;
2247 size -= 1;
2248 *pos += 1;
2249 result += 1;
2250 }
2251
2252 kfree(rd_buf);
2253 return result;
2254 }
2255
dp_dsc_pic_height_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2256 static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf,
2257 size_t size, loff_t *pos)
2258 {
2259 char *rd_buf = NULL;
2260 char *rd_buf_ptr = NULL;
2261 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2262 struct display_stream_compressor *dsc;
2263 struct dcn_dsc_state dsc_state = {0};
2264 const uint32_t rd_buf_size = 100;
2265 struct pipe_ctx *pipe_ctx;
2266 ssize_t result = 0;
2267 int i, r, str_len = 30;
2268
2269 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2270
2271 if (!rd_buf)
2272 return -ENOMEM;
2273
2274 rd_buf_ptr = rd_buf;
2275
2276 for (i = 0; i < MAX_PIPES; i++) {
2277 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2278 if (pipe_ctx->stream &&
2279 pipe_ctx->stream->link == aconnector->dc_link)
2280 break;
2281 }
2282
2283 dsc = pipe_ctx->stream_res.dsc;
2284 if (dsc)
2285 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2286
2287 snprintf(rd_buf_ptr, str_len,
2288 "%d\n",
2289 dsc_state.dsc_pic_height);
2290 rd_buf_ptr += str_len;
2291
2292 while (size) {
2293 if (*pos >= rd_buf_size)
2294 break;
2295
2296 r = put_user(*(rd_buf + result), buf);
2297 if (r) {
2298 kfree(rd_buf);
2299 return r; /* r = -EFAULT */
2300 }
2301
2302 buf += 1;
2303 size -= 1;
2304 *pos += 1;
2305 result += 1;
2306 }
2307
2308 kfree(rd_buf);
2309 return result;
2310 }
2311
2312 /* function: read DSC chunk size parameter on the connector
2313 *
2314 * The read function: dp_dsc_chunk_size_read
2315 * returns dsc chunk size set in the current configuration
2316 * The value is calculated automatically by DSC code
2317 * and depends on slice parameters and bpp target rate
2318 * The return is an integer: 0 or other positive integer
2319 * If 0 then DSC is disabled.
2320 *
2321 * Access it with the following command:
2322 *
2323 * cat /sys/kernel/debug/dri/0/DP-X/dsc_chunk_size
2324 *
2325 * 0 - means that DSC is disabled
2326 */
dp_dsc_chunk_size_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2327 static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf,
2328 size_t size, loff_t *pos)
2329 {
2330 char *rd_buf = NULL;
2331 char *rd_buf_ptr = NULL;
2332 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2333 struct display_stream_compressor *dsc;
2334 struct dcn_dsc_state dsc_state = {0};
2335 const uint32_t rd_buf_size = 100;
2336 struct pipe_ctx *pipe_ctx;
2337 ssize_t result = 0;
2338 int i, r, str_len = 30;
2339
2340 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2341
2342 if (!rd_buf)
2343 return -ENOMEM;
2344
2345 rd_buf_ptr = rd_buf;
2346
2347 for (i = 0; i < MAX_PIPES; i++) {
2348 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2349 if (pipe_ctx->stream &&
2350 pipe_ctx->stream->link == aconnector->dc_link)
2351 break;
2352 }
2353
2354 dsc = pipe_ctx->stream_res.dsc;
2355 if (dsc)
2356 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2357
2358 snprintf(rd_buf_ptr, str_len,
2359 "%d\n",
2360 dsc_state.dsc_chunk_size);
2361 rd_buf_ptr += str_len;
2362
2363 while (size) {
2364 if (*pos >= rd_buf_size)
2365 break;
2366
2367 r = put_user(*(rd_buf + result), buf);
2368 if (r) {
2369 kfree(rd_buf);
2370 return r; /* r = -EFAULT */
2371 }
2372
2373 buf += 1;
2374 size -= 1;
2375 *pos += 1;
2376 result += 1;
2377 }
2378
2379 kfree(rd_buf);
2380 return result;
2381 }
2382
2383 /* function: read DSC slice bpg offset on the connector
2384 *
2385 * The read function: dp_dsc_slice_bpg_offset_read
2386 * returns dsc bpg slice offset set in the current configuration
2387 * The value is calculated automatically by DSC code
2388 * and depends on slice parameters and bpp target rate
2389 * The return is an integer: 0 or other positive integer
2390 * If 0 then DSC is disabled.
2391 *
2392 * Access it with the following command:
2393 *
2394 * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_bpg_offset
2395 *
2396 * 0 - means that DSC is disabled
2397 */
dp_dsc_slice_bpg_offset_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2398 static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf,
2399 size_t size, loff_t *pos)
2400 {
2401 char *rd_buf = NULL;
2402 char *rd_buf_ptr = NULL;
2403 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2404 struct display_stream_compressor *dsc;
2405 struct dcn_dsc_state dsc_state = {0};
2406 const uint32_t rd_buf_size = 100;
2407 struct pipe_ctx *pipe_ctx;
2408 ssize_t result = 0;
2409 int i, r, str_len = 30;
2410
2411 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2412
2413 if (!rd_buf)
2414 return -ENOMEM;
2415
2416 rd_buf_ptr = rd_buf;
2417
2418 for (i = 0; i < MAX_PIPES; i++) {
2419 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2420 if (pipe_ctx->stream &&
2421 pipe_ctx->stream->link == aconnector->dc_link)
2422 break;
2423 }
2424
2425 dsc = pipe_ctx->stream_res.dsc;
2426 if (dsc)
2427 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2428
2429 snprintf(rd_buf_ptr, str_len,
2430 "%d\n",
2431 dsc_state.dsc_slice_bpg_offset);
2432 rd_buf_ptr += str_len;
2433
2434 while (size) {
2435 if (*pos >= rd_buf_size)
2436 break;
2437
2438 r = put_user(*(rd_buf + result), buf);
2439 if (r) {
2440 kfree(rd_buf);
2441 return r; /* r = -EFAULT */
2442 }
2443
2444 buf += 1;
2445 size -= 1;
2446 *pos += 1;
2447 result += 1;
2448 }
2449
2450 kfree(rd_buf);
2451 return result;
2452 }
2453
2454
2455 /*
2456 * function description: Read max_requested_bpc property from the connector
2457 *
2458 * Access it with the following command:
2459 *
2460 * cat /sys/kernel/debug/dri/0/DP-X/max_bpc
2461 *
2462 */
dp_max_bpc_read(struct file * f,char __user * buf,size_t size,loff_t * pos)2463 static ssize_t dp_max_bpc_read(struct file *f, char __user *buf,
2464 size_t size, loff_t *pos)
2465 {
2466 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2467 struct drm_connector *connector = &aconnector->base;
2468 struct drm_device *dev = connector->dev;
2469 struct dm_connector_state *state;
2470 ssize_t result = 0;
2471 char *rd_buf = NULL;
2472 char *rd_buf_ptr = NULL;
2473 const uint32_t rd_buf_size = 10;
2474 int r;
2475
2476 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2477
2478 if (!rd_buf)
2479 return -ENOMEM;
2480
2481 mutex_lock(&dev->mode_config.mutex);
2482 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2483
2484 if (connector->state == NULL)
2485 goto unlock;
2486
2487 state = to_dm_connector_state(connector->state);
2488
2489 rd_buf_ptr = rd_buf;
2490 snprintf(rd_buf_ptr, rd_buf_size,
2491 "%u\n",
2492 state->base.max_requested_bpc);
2493
2494 while (size) {
2495 if (*pos >= rd_buf_size)
2496 break;
2497
2498 r = put_user(*(rd_buf + result), buf);
2499 if (r) {
2500 result = r; /* r = -EFAULT */
2501 goto unlock;
2502 }
2503 buf += 1;
2504 size -= 1;
2505 *pos += 1;
2506 result += 1;
2507 }
2508 unlock:
2509 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2510 mutex_unlock(&dev->mode_config.mutex);
2511 kfree(rd_buf);
2512 return result;
2513 }
2514
2515
2516 /*
2517 * function description: Set max_requested_bpc property on the connector
2518 *
2519 * This function will not force the input BPC on connector, it will only
2520 * change the max value. This is equivalent to setting max_bpc through
2521 * xrandr.
2522 *
2523 * The BPC value written must be >= 6 and <= 16. Values outside of this
2524 * range will result in errors.
2525 *
2526 * BPC values:
2527 * 0x6 - 6 BPC
2528 * 0x8 - 8 BPC
2529 * 0xa - 10 BPC
2530 * 0xc - 12 BPC
2531 * 0x10 - 16 BPC
2532 *
2533 * Write the max_bpc in the following way:
2534 *
2535 * echo 0x6 > /sys/kernel/debug/dri/0/DP-X/max_bpc
2536 *
2537 */
dp_max_bpc_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)2538 static ssize_t dp_max_bpc_write(struct file *f, const char __user *buf,
2539 size_t size, loff_t *pos)
2540 {
2541 struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2542 struct drm_connector *connector = &aconnector->base;
2543 struct dm_connector_state *state;
2544 struct drm_device *dev = connector->dev;
2545 char *wr_buf = NULL;
2546 uint32_t wr_buf_size = 42;
2547 int max_param_num = 1;
2548 long param[1] = {0};
2549 uint8_t param_nums = 0;
2550
2551 if (size == 0)
2552 return -EINVAL;
2553
2554 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
2555
2556 if (!wr_buf) {
2557 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
2558 return -ENOSPC;
2559 }
2560
2561 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
2562 (long *)param, buf,
2563 max_param_num,
2564 ¶m_nums)) {
2565 kfree(wr_buf);
2566 return -EINVAL;
2567 }
2568
2569 if (param_nums <= 0) {
2570 DRM_DEBUG_DRIVER("user data not be read\n");
2571 kfree(wr_buf);
2572 return -EINVAL;
2573 }
2574
2575 if (param[0] < 6 || param[0] > 16) {
2576 DRM_DEBUG_DRIVER("bad max_bpc value\n");
2577 kfree(wr_buf);
2578 return -EINVAL;
2579 }
2580
2581 mutex_lock(&dev->mode_config.mutex);
2582 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2583
2584 if (connector->state == NULL)
2585 goto unlock;
2586
2587 state = to_dm_connector_state(connector->state);
2588 state->base.max_requested_bpc = param[0];
2589 unlock:
2590 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2591 mutex_unlock(&dev->mode_config.mutex);
2592
2593 kfree(wr_buf);
2594 return size;
2595 }
2596
2597 /*
2598 * Backlight at this moment. Read only.
2599 * As written to display, taking ABM and backlight lut into account.
2600 * Ranges from 0x0 to 0x10000 (= 100% PWM)
2601 *
2602 * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/current_backlight
2603 */
current_backlight_show(struct seq_file * m,void * unused)2604 static int current_backlight_show(struct seq_file *m, void *unused)
2605 {
2606 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
2607 struct dc_link *link = aconnector->dc_link;
2608 unsigned int backlight;
2609
2610 backlight = dc_link_get_backlight_level(link);
2611 seq_printf(m, "0x%x\n", backlight);
2612
2613 return 0;
2614 }
2615
2616 /*
2617 * Backlight value that is being approached. Read only.
2618 * As written to display, taking ABM and backlight lut into account.
2619 * Ranges from 0x0 to 0x10000 (= 100% PWM)
2620 *
2621 * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/target_backlight
2622 */
target_backlight_show(struct seq_file * m,void * unused)2623 static int target_backlight_show(struct seq_file *m, void *unused)
2624 {
2625 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
2626 struct dc_link *link = aconnector->dc_link;
2627 unsigned int backlight;
2628
2629 backlight = dc_link_get_target_backlight_pwm(link);
2630 seq_printf(m, "0x%x\n", backlight);
2631
2632 return 0;
2633 }
2634
2635 /*
2636 * function description: Determine if the connector is mst connector
2637 *
2638 * This function helps to determine whether a connector is a mst connector.
2639 * - "root" stands for the root connector of the topology
2640 * - "branch" stands for branch device of the topology
2641 * - "end" stands for leaf node connector of the topology
2642 * - "no" stands for the connector is not a device of a mst topology
2643 * Access it with the following command:
2644 *
2645 * cat /sys/kernel/debug/dri/0/DP-X/is_mst_connector
2646 *
2647 */
dp_is_mst_connector_show(struct seq_file * m,void * unused)2648 static int dp_is_mst_connector_show(struct seq_file *m, void *unused)
2649 {
2650 struct drm_connector *connector = m->private;
2651 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2652 struct drm_dp_mst_topology_mgr *mgr = NULL;
2653 struct drm_dp_mst_port *port = NULL;
2654 char *role = NULL;
2655
2656 mutex_lock(&aconnector->hpd_lock);
2657
2658 if (aconnector->mst_mgr.mst_state) {
2659 role = "root";
2660 } else if (aconnector->mst_root &&
2661 aconnector->mst_root->mst_mgr.mst_state) {
2662
2663 role = "end";
2664
2665 mgr = &aconnector->mst_root->mst_mgr;
2666 port = aconnector->mst_output_port;
2667
2668 drm_modeset_lock(&mgr->base.lock, NULL);
2669 if (port->pdt == DP_PEER_DEVICE_MST_BRANCHING &&
2670 port->mcs)
2671 role = "branch";
2672 drm_modeset_unlock(&mgr->base.lock);
2673
2674 } else {
2675 role = "no";
2676 }
2677
2678 seq_printf(m, "%s\n", role);
2679
2680 mutex_unlock(&aconnector->hpd_lock);
2681
2682 return 0;
2683 }
2684
2685 /*
2686 * function description: Read out the mst progress status
2687 *
2688 * This function helps to determine the mst progress status of
2689 * a mst connector.
2690 *
2691 * Access it with the following command:
2692 *
2693 * cat /sys/kernel/debug/dri/0/DP-X/mst_progress_status
2694 *
2695 */
dp_mst_progress_status_show(struct seq_file * m,void * unused)2696 static int dp_mst_progress_status_show(struct seq_file *m, void *unused)
2697 {
2698 struct drm_connector *connector = m->private;
2699 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2700 struct amdgpu_device *adev = drm_to_adev(connector->dev);
2701 int i;
2702
2703 mutex_lock(&aconnector->hpd_lock);
2704 mutex_lock(&adev->dm.dc_lock);
2705
2706 if (aconnector->mst_status == MST_STATUS_DEFAULT) {
2707 seq_puts(m, "disabled\n");
2708 } else {
2709 for (i = 0; i < sizeof(mst_progress_status)/sizeof(char *); i++)
2710 seq_printf(m, "%s:%s\n",
2711 mst_progress_status[i],
2712 aconnector->mst_status & BIT(i) ? "done" : "not_done");
2713 }
2714
2715 mutex_unlock(&adev->dm.dc_lock);
2716 mutex_unlock(&aconnector->hpd_lock);
2717
2718 return 0;
2719 }
2720
2721 /*
2722 * Reports whether the connected display is a USB4 DPIA tunneled display
2723 * Example usage: cat /sys/kernel/debug/dri/0/DP-8/is_dpia_link
2724 */
is_dpia_link_show(struct seq_file * m,void * data)2725 static int is_dpia_link_show(struct seq_file *m, void *data)
2726 {
2727 struct drm_connector *connector = m->private;
2728 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2729 struct dc_link *link = aconnector->dc_link;
2730
2731 if (connector->status != connector_status_connected)
2732 return -ENODEV;
2733
2734 seq_printf(m, "%s\n", (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ? "yes" :
2735 (link->ep_type == DISPLAY_ENDPOINT_PHY) ? "no" : "unknown");
2736
2737 return 0;
2738 }
2739
2740 DEFINE_SHOW_ATTRIBUTE(dp_dsc_fec_support);
2741 DEFINE_SHOW_ATTRIBUTE(dmub_fw_state);
2742 DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer);
2743 DEFINE_SHOW_ATTRIBUTE(dp_lttpr_status);
2744 DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);
2745 DEFINE_SHOW_ATTRIBUTE(internal_display);
2746 DEFINE_SHOW_ATTRIBUTE(odm_combine_segments);
2747 DEFINE_SHOW_ATTRIBUTE(psr_capability);
2748 DEFINE_SHOW_ATTRIBUTE(dp_is_mst_connector);
2749 DEFINE_SHOW_ATTRIBUTE(dp_mst_progress_status);
2750 DEFINE_SHOW_ATTRIBUTE(is_dpia_link);
2751
2752 static const struct file_operations dp_dsc_clock_en_debugfs_fops = {
2753 .owner = THIS_MODULE,
2754 .read = dp_dsc_clock_en_read,
2755 .write = dp_dsc_clock_en_write,
2756 .llseek = default_llseek
2757 };
2758
2759 static const struct file_operations dp_dsc_slice_width_debugfs_fops = {
2760 .owner = THIS_MODULE,
2761 .read = dp_dsc_slice_width_read,
2762 .write = dp_dsc_slice_width_write,
2763 .llseek = default_llseek
2764 };
2765
2766 static const struct file_operations dp_dsc_slice_height_debugfs_fops = {
2767 .owner = THIS_MODULE,
2768 .read = dp_dsc_slice_height_read,
2769 .write = dp_dsc_slice_height_write,
2770 .llseek = default_llseek
2771 };
2772
2773 static const struct file_operations dp_dsc_bits_per_pixel_debugfs_fops = {
2774 .owner = THIS_MODULE,
2775 .read = dp_dsc_bits_per_pixel_read,
2776 .write = dp_dsc_bits_per_pixel_write,
2777 .llseek = default_llseek
2778 };
2779
2780 static const struct file_operations dp_dsc_pic_width_debugfs_fops = {
2781 .owner = THIS_MODULE,
2782 .read = dp_dsc_pic_width_read,
2783 .llseek = default_llseek
2784 };
2785
2786 static const struct file_operations dp_dsc_pic_height_debugfs_fops = {
2787 .owner = THIS_MODULE,
2788 .read = dp_dsc_pic_height_read,
2789 .llseek = default_llseek
2790 };
2791
2792 static const struct file_operations dp_dsc_chunk_size_debugfs_fops = {
2793 .owner = THIS_MODULE,
2794 .read = dp_dsc_chunk_size_read,
2795 .llseek = default_llseek
2796 };
2797
2798 static const struct file_operations dp_dsc_slice_bpg_offset_debugfs_fops = {
2799 .owner = THIS_MODULE,
2800 .read = dp_dsc_slice_bpg_offset_read,
2801 .llseek = default_llseek
2802 };
2803
2804 static const struct file_operations trigger_hotplug_debugfs_fops = {
2805 .owner = THIS_MODULE,
2806 .write = trigger_hotplug,
2807 .llseek = default_llseek
2808 };
2809
2810 static const struct file_operations dp_link_settings_debugfs_fops = {
2811 .owner = THIS_MODULE,
2812 .read = dp_link_settings_read,
2813 .write = dp_link_settings_write,
2814 .llseek = default_llseek
2815 };
2816
2817 static const struct file_operations dp_phy_settings_debugfs_fop = {
2818 .owner = THIS_MODULE,
2819 .read = dp_phy_settings_read,
2820 .write = dp_phy_settings_write,
2821 .llseek = default_llseek
2822 };
2823
2824 static const struct file_operations dp_phy_test_pattern_fops = {
2825 .owner = THIS_MODULE,
2826 .write = dp_phy_test_pattern_debugfs_write,
2827 .llseek = default_llseek
2828 };
2829
2830 static const struct file_operations sdp_message_fops = {
2831 .owner = THIS_MODULE,
2832 .write = dp_sdp_message_debugfs_write,
2833 .llseek = default_llseek
2834 };
2835
2836 static const struct file_operations dp_max_bpc_debugfs_fops = {
2837 .owner = THIS_MODULE,
2838 .read = dp_max_bpc_read,
2839 .write = dp_max_bpc_write,
2840 .llseek = default_llseek
2841 };
2842
2843 static const struct file_operations dp_dsc_disable_passthrough_debugfs_fops = {
2844 .owner = THIS_MODULE,
2845 .write = dp_dsc_passthrough_set,
2846 .llseek = default_llseek
2847 };
2848
2849 static const struct file_operations dp_mst_link_settings_debugfs_fops = {
2850 .owner = THIS_MODULE,
2851 .write = dp_mst_link_setting,
2852 .llseek = default_llseek
2853 };
2854
2855 static const struct {
2856 char *name;
2857 const struct file_operations *fops;
2858 } dp_debugfs_entries[] = {
2859 {"link_settings", &dp_link_settings_debugfs_fops},
2860 {"phy_settings", &dp_phy_settings_debugfs_fop},
2861 {"lttpr_status", &dp_lttpr_status_fops},
2862 {"test_pattern", &dp_phy_test_pattern_fops},
2863 {"hdcp_sink_capability", &hdcp_sink_capability_fops},
2864 {"sdp_message", &sdp_message_fops},
2865 {"dsc_clock_en", &dp_dsc_clock_en_debugfs_fops},
2866 {"dsc_slice_width", &dp_dsc_slice_width_debugfs_fops},
2867 {"dsc_slice_height", &dp_dsc_slice_height_debugfs_fops},
2868 {"dsc_bits_per_pixel", &dp_dsc_bits_per_pixel_debugfs_fops},
2869 {"dsc_pic_width", &dp_dsc_pic_width_debugfs_fops},
2870 {"dsc_pic_height", &dp_dsc_pic_height_debugfs_fops},
2871 {"dsc_chunk_size", &dp_dsc_chunk_size_debugfs_fops},
2872 {"dsc_slice_bpg", &dp_dsc_slice_bpg_offset_debugfs_fops},
2873 {"dp_dsc_fec_support", &dp_dsc_fec_support_fops},
2874 {"max_bpc", &dp_max_bpc_debugfs_fops},
2875 {"dsc_disable_passthrough", &dp_dsc_disable_passthrough_debugfs_fops},
2876 {"is_mst_connector", &dp_is_mst_connector_fops},
2877 {"mst_progress_status", &dp_mst_progress_status_fops},
2878 {"is_dpia_link", &is_dpia_link_fops},
2879 {"mst_link_settings", &dp_mst_link_settings_debugfs_fops}
2880 };
2881
2882 static const struct {
2883 char *name;
2884 const struct file_operations *fops;
2885 } hdmi_debugfs_entries[] = {
2886 {"hdcp_sink_capability", &hdcp_sink_capability_fops}
2887 };
2888
2889 /*
2890 * Force YUV420 output if available from the given mode
2891 */
force_yuv420_output_set(void * data,u64 val)2892 static int force_yuv420_output_set(void *data, u64 val)
2893 {
2894 struct amdgpu_dm_connector *connector = data;
2895
2896 connector->force_yuv420_output = (bool)val;
2897
2898 return 0;
2899 }
2900
2901 /*
2902 * Check if YUV420 is forced when available from the given mode
2903 */
force_yuv420_output_get(void * data,u64 * val)2904 static int force_yuv420_output_get(void *data, u64 *val)
2905 {
2906 struct amdgpu_dm_connector *connector = data;
2907
2908 *val = connector->force_yuv420_output;
2909
2910 return 0;
2911 }
2912
2913 DEFINE_DEBUGFS_ATTRIBUTE(force_yuv420_output_fops, force_yuv420_output_get,
2914 force_yuv420_output_set, "%llu\n");
2915
2916 /*
2917 * Read PSR state
2918 */
psr_get(void * data,u64 * val)2919 static int psr_get(void *data, u64 *val)
2920 {
2921 struct amdgpu_dm_connector *connector = data;
2922 struct dc_link *link = connector->dc_link;
2923 enum dc_psr_state state = PSR_STATE0;
2924
2925 dc_link_get_psr_state(link, &state);
2926
2927 *val = state;
2928
2929 return 0;
2930 }
2931
2932 /*
2933 * Read PSR state residency
2934 */
psr_read_residency(void * data,u64 * val)2935 static int psr_read_residency(void *data, u64 *val)
2936 {
2937 struct amdgpu_dm_connector *connector = data;
2938 struct dc_link *link = connector->dc_link;
2939 u32 residency;
2940
2941 link->dc->link_srv->edp_get_psr_residency(link, &residency);
2942
2943 *val = (u64)residency;
2944
2945 return 0;
2946 }
2947
2948 /* read allow_edp_hotplug_detection */
allow_edp_hotplug_detection_get(void * data,u64 * val)2949 static int allow_edp_hotplug_detection_get(void *data, u64 *val)
2950 {
2951 struct amdgpu_dm_connector *aconnector = data;
2952 struct drm_connector *connector = &aconnector->base;
2953 struct drm_device *dev = connector->dev;
2954 struct amdgpu_device *adev = drm_to_adev(dev);
2955
2956 *val = adev->dm.dc->config.allow_edp_hotplug_detection;
2957
2958 return 0;
2959 }
2960
2961 /* set allow_edp_hotplug_detection */
allow_edp_hotplug_detection_set(void * data,u64 val)2962 static int allow_edp_hotplug_detection_set(void *data, u64 val)
2963 {
2964 struct amdgpu_dm_connector *aconnector = data;
2965 struct drm_connector *connector = &aconnector->base;
2966 struct drm_device *dev = connector->dev;
2967 struct amdgpu_device *adev = drm_to_adev(dev);
2968
2969 adev->dm.dc->config.allow_edp_hotplug_detection = (uint32_t) val;
2970
2971 return 0;
2972 }
2973
dmub_trace_mask_set(void * data,u64 val)2974 static int dmub_trace_mask_set(void *data, u64 val)
2975 {
2976 struct amdgpu_device *adev = data;
2977 struct dmub_srv *srv = adev->dm.dc->ctx->dmub_srv->dmub;
2978 enum dmub_gpint_command cmd;
2979 u64 mask = 0xffff;
2980 u8 shift = 0;
2981 u32 res;
2982 int i;
2983
2984 if (!srv->fw_version)
2985 return -EINVAL;
2986
2987 for (i = 0; i < 4; i++) {
2988 res = (val & mask) >> shift;
2989
2990 switch (i) {
2991 case 0:
2992 cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD0;
2993 break;
2994 case 1:
2995 cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD1;
2996 break;
2997 case 2:
2998 cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD2;
2999 break;
3000 case 3:
3001 cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD3;
3002 break;
3003 }
3004
3005 if (!dc_wake_and_execute_gpint(adev->dm.dc->ctx, cmd, res, NULL, DM_DMUB_WAIT_TYPE_WAIT))
3006 return -EIO;
3007
3008 usleep_range(100, 1000);
3009
3010 mask <<= 16;
3011 shift += 16;
3012 }
3013
3014 return 0;
3015 }
3016
dmub_trace_mask_show(void * data,u64 * val)3017 static int dmub_trace_mask_show(void *data, u64 *val)
3018 {
3019 enum dmub_gpint_command cmd = DMUB_GPINT__GET_TRACE_BUFFER_MASK_WORD0;
3020 struct amdgpu_device *adev = data;
3021 struct dmub_srv *srv = adev->dm.dc->ctx->dmub_srv->dmub;
3022 u8 shift = 0;
3023 u64 raw = 0;
3024 u64 res = 0;
3025 int i = 0;
3026
3027 if (!srv->fw_version)
3028 return -EINVAL;
3029
3030 while (i < 4) {
3031 uint32_t response;
3032
3033 if (!dc_wake_and_execute_gpint(adev->dm.dc->ctx, cmd, 0, &response, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY))
3034 return -EIO;
3035
3036 raw = response;
3037 usleep_range(100, 1000);
3038
3039 cmd++;
3040 res |= (raw << shift);
3041 shift += 16;
3042 i++;
3043 }
3044
3045 *val = res;
3046
3047 return 0;
3048 }
3049
3050 DEFINE_DEBUGFS_ATTRIBUTE(dmub_trace_mask_fops, dmub_trace_mask_show,
3051 dmub_trace_mask_set, "0x%llx\n");
3052
3053 /*
3054 * Set dmcub trace event IRQ enable or disable.
3055 * Usage to enable dmcub trace event IRQ: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3056 * Usage to disable dmcub trace event IRQ: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3057 */
dmcub_trace_event_state_set(void * data,u64 val)3058 static int dmcub_trace_event_state_set(void *data, u64 val)
3059 {
3060 struct amdgpu_device *adev = data;
3061
3062 if (val == 1 || val == 0) {
3063 dc_dmub_trace_event_control(adev->dm.dc, val);
3064 adev->dm.dmcub_trace_event_en = (bool)val;
3065 } else
3066 return 0;
3067
3068 return 0;
3069 }
3070
3071 /*
3072 * The interface doesn't need get function, so it will return the
3073 * value of zero
3074 * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3075 */
dmcub_trace_event_state_get(void * data,u64 * val)3076 static int dmcub_trace_event_state_get(void *data, u64 *val)
3077 {
3078 struct amdgpu_device *adev = data;
3079
3080 *val = adev->dm.dmcub_trace_event_en;
3081 return 0;
3082 }
3083
3084 DEFINE_DEBUGFS_ATTRIBUTE(dmcub_trace_event_state_fops, dmcub_trace_event_state_get,
3085 dmcub_trace_event_state_set, "%llu\n");
3086
3087 DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n");
3088 DEFINE_DEBUGFS_ATTRIBUTE(psr_residency_fops, psr_read_residency, NULL,
3089 "%llu\n");
3090
3091 DEFINE_DEBUGFS_ATTRIBUTE(allow_edp_hotplug_detection_fops,
3092 allow_edp_hotplug_detection_get,
3093 allow_edp_hotplug_detection_set, "%llu\n");
3094
3095 DEFINE_SHOW_ATTRIBUTE(current_backlight);
3096 DEFINE_SHOW_ATTRIBUTE(target_backlight);
3097
3098 static const struct {
3099 char *name;
3100 const struct file_operations *fops;
3101 } connector_debugfs_entries[] = {
3102 {"force_yuv420_output", &force_yuv420_output_fops},
3103 {"trigger_hotplug", &trigger_hotplug_debugfs_fops},
3104 {"internal_display", &internal_display_fops},
3105 {"odm_combine_segments", &odm_combine_segments_fops}
3106 };
3107
3108 /*
3109 * Returns supported customized link rates by this eDP panel.
3110 * Example usage: cat /sys/kernel/debug/dri/0/eDP-x/ilr_setting
3111 */
edp_ilr_show(struct seq_file * m,void * unused)3112 static int edp_ilr_show(struct seq_file *m, void *unused)
3113 {
3114 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
3115 struct dc_link *link = aconnector->dc_link;
3116 uint8_t supported_link_rates[16];
3117 uint32_t link_rate_in_khz;
3118 uint32_t entry = 0;
3119 uint8_t dpcd_rev;
3120
3121 memset(supported_link_rates, 0, sizeof(supported_link_rates));
3122 dm_helpers_dp_read_dpcd(link->ctx, link, DP_SUPPORTED_LINK_RATES,
3123 supported_link_rates, sizeof(supported_link_rates));
3124
3125 dpcd_rev = link->dpcd_caps.dpcd_rev.raw;
3126
3127 if (dpcd_rev >= DP_DPCD_REV_13 &&
3128 (supported_link_rates[entry+1] != 0 || supported_link_rates[entry] != 0)) {
3129
3130 for (entry = 0; entry < 16; entry += 2) {
3131 link_rate_in_khz = (supported_link_rates[entry+1] * 0x100 +
3132 supported_link_rates[entry]) * 200;
3133 seq_printf(m, "[%d] %d kHz\n", entry/2, link_rate_in_khz);
3134 }
3135 } else {
3136 seq_puts(m, "ILR is not supported by this eDP panel.\n");
3137 }
3138
3139 return 0;
3140 }
3141
3142 /*
3143 * Set supported customized link rate to eDP panel.
3144 *
3145 * echo <lane_count> <link_rate option> > ilr_setting
3146 *
3147 * for example, supported ILR : [0] 1620000 kHz [1] 2160000 kHz [2] 2430000 kHz ...
3148 * echo 4 1 > /sys/kernel/debug/dri/0/eDP-x/ilr_setting
3149 * to set 4 lanes and 2.16 GHz
3150 */
edp_ilr_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)3151 static ssize_t edp_ilr_write(struct file *f, const char __user *buf,
3152 size_t size, loff_t *pos)
3153 {
3154 struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
3155 struct dc_link *link = connector->dc_link;
3156 struct amdgpu_device *adev = drm_to_adev(connector->base.dev);
3157 struct dc *dc = (struct dc *)link->dc;
3158 struct dc_link_settings prefer_link_settings;
3159 char *wr_buf = NULL;
3160 const uint32_t wr_buf_size = 40;
3161 /* 0: lane_count; 1: link_rate */
3162 int max_param_num = 2;
3163 uint8_t param_nums = 0;
3164 long param[2];
3165 bool valid_input = true;
3166
3167 if (size == 0)
3168 return -EINVAL;
3169
3170 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
3171 if (!wr_buf)
3172 return -ENOMEM;
3173
3174 if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
3175 (long *)param, buf,
3176 max_param_num,
3177 ¶m_nums)) {
3178 kfree(wr_buf);
3179 return -EINVAL;
3180 }
3181
3182 if (param_nums <= 0) {
3183 kfree(wr_buf);
3184 return -EINVAL;
3185 }
3186
3187 switch (param[0]) {
3188 case LANE_COUNT_ONE:
3189 case LANE_COUNT_TWO:
3190 case LANE_COUNT_FOUR:
3191 break;
3192 default:
3193 valid_input = false;
3194 break;
3195 }
3196
3197 if (param[1] >= link->dpcd_caps.edp_supported_link_rates_count)
3198 valid_input = false;
3199
3200 if (!valid_input) {
3201 kfree(wr_buf);
3202 DRM_DEBUG_DRIVER("Invalid Input value. No HW will be programmed\n");
3203 prefer_link_settings.use_link_rate_set = false;
3204 mutex_lock(&adev->dm.dc_lock);
3205 dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false);
3206 mutex_unlock(&adev->dm.dc_lock);
3207 return size;
3208 }
3209
3210 /* save user force lane_count, link_rate to preferred settings
3211 * spread spectrum will not be changed
3212 */
3213 prefer_link_settings.link_spread = link->cur_link_settings.link_spread;
3214 prefer_link_settings.lane_count = param[0];
3215 prefer_link_settings.use_link_rate_set = true;
3216 prefer_link_settings.link_rate_set = param[1];
3217 prefer_link_settings.link_rate = link->dpcd_caps.edp_supported_link_rates[param[1]];
3218
3219 mutex_lock(&adev->dm.dc_lock);
3220 dc_link_set_preferred_training_settings(dc, &prefer_link_settings,
3221 NULL, link, false);
3222 mutex_unlock(&adev->dm.dc_lock);
3223
3224 kfree(wr_buf);
3225 return size;
3226 }
3227
edp_ilr_open(struct inode * inode,struct file * file)3228 static int edp_ilr_open(struct inode *inode, struct file *file)
3229 {
3230 return single_open(file, edp_ilr_show, inode->i_private);
3231 }
3232
3233 static const struct file_operations edp_ilr_debugfs_fops = {
3234 .owner = THIS_MODULE,
3235 .open = edp_ilr_open,
3236 .read = seq_read,
3237 .llseek = seq_lseek,
3238 .release = single_release,
3239 .write = edp_ilr_write
3240 };
3241
connector_debugfs_init(struct amdgpu_dm_connector * connector)3242 void connector_debugfs_init(struct amdgpu_dm_connector *connector)
3243 {
3244 int i;
3245 struct dentry *dir = connector->base.debugfs_entry;
3246
3247 if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
3248 connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
3249 for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
3250 debugfs_create_file(dp_debugfs_entries[i].name,
3251 0644, dir, connector,
3252 dp_debugfs_entries[i].fops);
3253 }
3254 }
3255 if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
3256 debugfs_create_file_unsafe("psr_capability", 0444, dir, connector, &psr_capability_fops);
3257 debugfs_create_file_unsafe("psr_state", 0444, dir, connector, &psr_fops);
3258 debugfs_create_file_unsafe("psr_residency", 0444, dir,
3259 connector, &psr_residency_fops);
3260 debugfs_create_file("amdgpu_current_backlight_pwm", 0444, dir, connector,
3261 ¤t_backlight_fops);
3262 debugfs_create_file("amdgpu_target_backlight_pwm", 0444, dir, connector,
3263 &target_backlight_fops);
3264 debugfs_create_file("ilr_setting", 0644, dir, connector,
3265 &edp_ilr_debugfs_fops);
3266 debugfs_create_file("allow_edp_hotplug_detection", 0644, dir, connector,
3267 &allow_edp_hotplug_detection_fops);
3268 }
3269
3270 for (i = 0; i < ARRAY_SIZE(connector_debugfs_entries); i++) {
3271 debugfs_create_file(connector_debugfs_entries[i].name,
3272 0644, dir, connector,
3273 connector_debugfs_entries[i].fops);
3274 }
3275
3276 if (connector->base.connector_type == DRM_MODE_CONNECTOR_HDMIA) {
3277 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_entries); i++) {
3278 debugfs_create_file(hdmi_debugfs_entries[i].name,
3279 0644, dir, connector,
3280 hdmi_debugfs_entries[i].fops);
3281 }
3282 }
3283 }
3284
3285 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
3286 /*
3287 * Set crc window coordinate x start
3288 */
crc_win_x_start_set(void * data,u64 val)3289 static int crc_win_x_start_set(void *data, u64 val)
3290 {
3291 struct drm_crtc *crtc = data;
3292 struct drm_device *drm_dev = crtc->dev;
3293 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3294
3295 spin_lock_irq(&drm_dev->event_lock);
3296 acrtc->dm_irq_params.window_param.x_start = (uint16_t) val;
3297 acrtc->dm_irq_params.window_param.update_win = false;
3298 spin_unlock_irq(&drm_dev->event_lock);
3299
3300 return 0;
3301 }
3302
3303 /*
3304 * Get crc window coordinate x start
3305 */
crc_win_x_start_get(void * data,u64 * val)3306 static int crc_win_x_start_get(void *data, u64 *val)
3307 {
3308 struct drm_crtc *crtc = data;
3309 struct drm_device *drm_dev = crtc->dev;
3310 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3311
3312 spin_lock_irq(&drm_dev->event_lock);
3313 *val = acrtc->dm_irq_params.window_param.x_start;
3314 spin_unlock_irq(&drm_dev->event_lock);
3315
3316 return 0;
3317 }
3318
3319 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_start_fops, crc_win_x_start_get,
3320 crc_win_x_start_set, "%llu\n");
3321
3322
3323 /*
3324 * Set crc window coordinate y start
3325 */
crc_win_y_start_set(void * data,u64 val)3326 static int crc_win_y_start_set(void *data, u64 val)
3327 {
3328 struct drm_crtc *crtc = data;
3329 struct drm_device *drm_dev = crtc->dev;
3330 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3331
3332 spin_lock_irq(&drm_dev->event_lock);
3333 acrtc->dm_irq_params.window_param.y_start = (uint16_t) val;
3334 acrtc->dm_irq_params.window_param.update_win = false;
3335 spin_unlock_irq(&drm_dev->event_lock);
3336
3337 return 0;
3338 }
3339
3340 /*
3341 * Get crc window coordinate y start
3342 */
crc_win_y_start_get(void * data,u64 * val)3343 static int crc_win_y_start_get(void *data, u64 *val)
3344 {
3345 struct drm_crtc *crtc = data;
3346 struct drm_device *drm_dev = crtc->dev;
3347 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3348
3349 spin_lock_irq(&drm_dev->event_lock);
3350 *val = acrtc->dm_irq_params.window_param.y_start;
3351 spin_unlock_irq(&drm_dev->event_lock);
3352
3353 return 0;
3354 }
3355
3356 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_start_fops, crc_win_y_start_get,
3357 crc_win_y_start_set, "%llu\n");
3358
3359 /*
3360 * Set crc window coordinate x end
3361 */
crc_win_x_end_set(void * data,u64 val)3362 static int crc_win_x_end_set(void *data, u64 val)
3363 {
3364 struct drm_crtc *crtc = data;
3365 struct drm_device *drm_dev = crtc->dev;
3366 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3367
3368 spin_lock_irq(&drm_dev->event_lock);
3369 acrtc->dm_irq_params.window_param.x_end = (uint16_t) val;
3370 acrtc->dm_irq_params.window_param.update_win = false;
3371 spin_unlock_irq(&drm_dev->event_lock);
3372
3373 return 0;
3374 }
3375
3376 /*
3377 * Get crc window coordinate x end
3378 */
crc_win_x_end_get(void * data,u64 * val)3379 static int crc_win_x_end_get(void *data, u64 *val)
3380 {
3381 struct drm_crtc *crtc = data;
3382 struct drm_device *drm_dev = crtc->dev;
3383 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3384
3385 spin_lock_irq(&drm_dev->event_lock);
3386 *val = acrtc->dm_irq_params.window_param.x_end;
3387 spin_unlock_irq(&drm_dev->event_lock);
3388
3389 return 0;
3390 }
3391
3392 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_end_fops, crc_win_x_end_get,
3393 crc_win_x_end_set, "%llu\n");
3394
3395 /*
3396 * Set crc window coordinate y end
3397 */
crc_win_y_end_set(void * data,u64 val)3398 static int crc_win_y_end_set(void *data, u64 val)
3399 {
3400 struct drm_crtc *crtc = data;
3401 struct drm_device *drm_dev = crtc->dev;
3402 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3403
3404 spin_lock_irq(&drm_dev->event_lock);
3405 acrtc->dm_irq_params.window_param.y_end = (uint16_t) val;
3406 acrtc->dm_irq_params.window_param.update_win = false;
3407 spin_unlock_irq(&drm_dev->event_lock);
3408
3409 return 0;
3410 }
3411
3412 /*
3413 * Get crc window coordinate y end
3414 */
crc_win_y_end_get(void * data,u64 * val)3415 static int crc_win_y_end_get(void *data, u64 *val)
3416 {
3417 struct drm_crtc *crtc = data;
3418 struct drm_device *drm_dev = crtc->dev;
3419 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3420
3421 spin_lock_irq(&drm_dev->event_lock);
3422 *val = acrtc->dm_irq_params.window_param.y_end;
3423 spin_unlock_irq(&drm_dev->event_lock);
3424
3425 return 0;
3426 }
3427
3428 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_end_fops, crc_win_y_end_get,
3429 crc_win_y_end_set, "%llu\n");
3430 /*
3431 * Trigger to commit crc window
3432 */
crc_win_update_set(void * data,u64 val)3433 static int crc_win_update_set(void *data, u64 val)
3434 {
3435 struct drm_crtc *crtc = data;
3436 struct amdgpu_crtc *acrtc;
3437 struct amdgpu_device *adev = drm_to_adev(crtc->dev);
3438
3439 if (val) {
3440 acrtc = to_amdgpu_crtc(crtc);
3441 mutex_lock(&adev->dm.dc_lock);
3442 /* PSR may write to OTG CRC window control register,
3443 * so close it before starting secure_display.
3444 */
3445 amdgpu_dm_psr_disable(acrtc->dm_irq_params.stream);
3446
3447 spin_lock_irq(&adev_to_drm(adev)->event_lock);
3448
3449 acrtc->dm_irq_params.window_param.activated = true;
3450 acrtc->dm_irq_params.window_param.update_win = true;
3451 acrtc->dm_irq_params.window_param.skip_frame_cnt = 0;
3452
3453 spin_unlock_irq(&adev_to_drm(adev)->event_lock);
3454 mutex_unlock(&adev->dm.dc_lock);
3455 }
3456
3457 return 0;
3458 }
3459
3460 /*
3461 * Get crc window update flag
3462 */
crc_win_update_get(void * data,u64 * val)3463 static int crc_win_update_get(void *data, u64 *val)
3464 {
3465 *val = 0;
3466 return 0;
3467 }
3468
3469 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_update_fops, crc_win_update_get,
3470 crc_win_update_set, "%llu\n");
3471 #endif
crtc_debugfs_init(struct drm_crtc * crtc)3472 void crtc_debugfs_init(struct drm_crtc *crtc)
3473 {
3474 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
3475 struct dentry *dir = debugfs_lookup("crc", crtc->debugfs_entry);
3476
3477 if (!dir)
3478 return;
3479
3480 debugfs_create_file_unsafe("crc_win_x_start", 0644, dir, crtc,
3481 &crc_win_x_start_fops);
3482 debugfs_create_file_unsafe("crc_win_y_start", 0644, dir, crtc,
3483 &crc_win_y_start_fops);
3484 debugfs_create_file_unsafe("crc_win_x_end", 0644, dir, crtc,
3485 &crc_win_x_end_fops);
3486 debugfs_create_file_unsafe("crc_win_y_end", 0644, dir, crtc,
3487 &crc_win_y_end_fops);
3488 debugfs_create_file_unsafe("crc_win_update", 0644, dir, crtc,
3489 &crc_win_update_fops);
3490 dput(dir);
3491 #endif
3492 debugfs_create_file("amdgpu_current_bpc", 0644, crtc->debugfs_entry,
3493 crtc, &amdgpu_current_bpc_fops);
3494 debugfs_create_file("amdgpu_current_colorspace", 0644, crtc->debugfs_entry,
3495 crtc, &amdgpu_current_colorspace_fops);
3496 }
3497
3498 /*
3499 * Writes DTN log state to the user supplied buffer.
3500 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log
3501 */
dtn_log_read(struct file * f,char __user * buf,size_t size,loff_t * pos)3502 static ssize_t dtn_log_read(
3503 struct file *f,
3504 char __user *buf,
3505 size_t size,
3506 loff_t *pos)
3507 {
3508 struct amdgpu_device *adev = file_inode(f)->i_private;
3509 struct dc *dc = adev->dm.dc;
3510 struct dc_log_buffer_ctx log_ctx = { 0 };
3511 ssize_t result = 0;
3512
3513 if (!buf || !size)
3514 return -EINVAL;
3515
3516 if (!dc->hwss.log_hw_state)
3517 return 0;
3518
3519 dc->hwss.log_hw_state(dc, &log_ctx);
3520
3521 if (*pos < log_ctx.pos) {
3522 size_t to_copy = log_ctx.pos - *pos;
3523
3524 to_copy = min(to_copy, size);
3525
3526 if (!copy_to_user(buf, log_ctx.buf + *pos, to_copy)) {
3527 *pos += to_copy;
3528 result = to_copy;
3529 }
3530 }
3531
3532 kfree(log_ctx.buf);
3533
3534 return result;
3535 }
3536
3537 /*
3538 * Writes DTN log state to dmesg when triggered via a write.
3539 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log
3540 */
dtn_log_write(struct file * f,const char __user * buf,size_t size,loff_t * pos)3541 static ssize_t dtn_log_write(
3542 struct file *f,
3543 const char __user *buf,
3544 size_t size,
3545 loff_t *pos)
3546 {
3547 struct amdgpu_device *adev = file_inode(f)->i_private;
3548 struct dc *dc = adev->dm.dc;
3549
3550 /* Write triggers log output via dmesg. */
3551 if (size == 0)
3552 return 0;
3553
3554 if (dc->hwss.log_hw_state)
3555 dc->hwss.log_hw_state(dc, NULL);
3556
3557 return size;
3558 }
3559
mst_topo_show(struct seq_file * m,void * unused)3560 static int mst_topo_show(struct seq_file *m, void *unused)
3561 {
3562 struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
3563 struct drm_device *dev = adev_to_drm(adev);
3564 struct drm_connector *connector;
3565 struct drm_connector_list_iter conn_iter;
3566 struct amdgpu_dm_connector *aconnector;
3567
3568 drm_connector_list_iter_begin(dev, &conn_iter);
3569 drm_for_each_connector_iter(connector, &conn_iter) {
3570 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
3571 continue;
3572
3573 aconnector = to_amdgpu_dm_connector(connector);
3574
3575 /* Ensure we're only dumping the topology of a root mst node */
3576 if (!aconnector->mst_mgr.mst_state)
3577 continue;
3578
3579 seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id);
3580 drm_dp_mst_dump_topology(m, &aconnector->mst_mgr);
3581 }
3582 drm_connector_list_iter_end(&conn_iter);
3583
3584 return 0;
3585 }
3586
3587 /*
3588 * Sets trigger hpd for MST topologies.
3589 * All connected connectors will be rediscovered and re started as needed if val of 1 is sent.
3590 * All topologies will be disconnected if val of 0 is set .
3591 * Usage to enable topologies: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3592 * Usage to disable topologies: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3593 */
trigger_hpd_mst_set(void * data,u64 val)3594 static int trigger_hpd_mst_set(void *data, u64 val)
3595 {
3596 struct amdgpu_device *adev = data;
3597 struct drm_device *dev = adev_to_drm(adev);
3598 struct drm_connector_list_iter iter;
3599 struct amdgpu_dm_connector *aconnector;
3600 struct drm_connector *connector;
3601 struct dc_link *link = NULL;
3602
3603 if (val == 1) {
3604 drm_connector_list_iter_begin(dev, &iter);
3605 drm_for_each_connector_iter(connector, &iter) {
3606 aconnector = to_amdgpu_dm_connector(connector);
3607 if (aconnector->dc_link->type == dc_connection_mst_branch &&
3608 aconnector->mst_mgr.aux) {
3609 mutex_lock(&adev->dm.dc_lock);
3610 dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
3611 mutex_unlock(&adev->dm.dc_lock);
3612
3613 drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
3614 }
3615 }
3616 } else if (val == 0) {
3617 drm_connector_list_iter_begin(dev, &iter);
3618 drm_for_each_connector_iter(connector, &iter) {
3619 aconnector = to_amdgpu_dm_connector(connector);
3620 if (!aconnector->dc_link)
3621 continue;
3622
3623 if (!aconnector->mst_root)
3624 continue;
3625
3626 link = aconnector->dc_link;
3627 dc_link_dp_receiver_power_ctrl(link, false);
3628 drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_root->mst_mgr, false);
3629 link->mst_stream_alloc_table.stream_count = 0;
3630 memset(link->mst_stream_alloc_table.stream_allocations, 0,
3631 sizeof(link->mst_stream_alloc_table.stream_allocations));
3632 }
3633 } else {
3634 return 0;
3635 }
3636 drm_kms_helper_hotplug_event(dev);
3637
3638 return 0;
3639 }
3640
3641 /*
3642 * The interface doesn't need get function, so it will return the
3643 * value of zero
3644 * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3645 */
trigger_hpd_mst_get(void * data,u64 * val)3646 static int trigger_hpd_mst_get(void *data, u64 *val)
3647 {
3648 *val = 0;
3649 return 0;
3650 }
3651
3652 DEFINE_DEBUGFS_ATTRIBUTE(trigger_hpd_mst_ops, trigger_hpd_mst_get,
3653 trigger_hpd_mst_set, "%llu\n");
3654
3655
3656 /*
3657 * Sets the force_timing_sync debug option from the given string.
3658 * All connected displays will be force synchronized immediately.
3659 * Usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync
3660 */
force_timing_sync_set(void * data,u64 val)3661 static int force_timing_sync_set(void *data, u64 val)
3662 {
3663 struct amdgpu_device *adev = data;
3664
3665 adev->dm.force_timing_sync = (bool)val;
3666
3667 amdgpu_dm_trigger_timing_sync(adev_to_drm(adev));
3668
3669 return 0;
3670 }
3671
3672 /*
3673 * Gets the force_timing_sync debug option value into the given buffer.
3674 * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync
3675 */
force_timing_sync_get(void * data,u64 * val)3676 static int force_timing_sync_get(void *data, u64 *val)
3677 {
3678 struct amdgpu_device *adev = data;
3679
3680 *val = adev->dm.force_timing_sync;
3681
3682 return 0;
3683 }
3684
3685 DEFINE_DEBUGFS_ATTRIBUTE(force_timing_sync_ops, force_timing_sync_get,
3686 force_timing_sync_set, "%llu\n");
3687
3688
3689 /*
3690 * Disables all HPD and HPD RX interrupt handling in the
3691 * driver when set to 1. Default is 0.
3692 */
disable_hpd_set(void * data,u64 val)3693 static int disable_hpd_set(void *data, u64 val)
3694 {
3695 struct amdgpu_device *adev = data;
3696
3697 adev->dm.disable_hpd_irq = (bool)val;
3698
3699 return 0;
3700 }
3701
3702
3703 /*
3704 * Returns 1 if HPD and HPRX interrupt handling is disabled,
3705 * 0 otherwise.
3706 */
disable_hpd_get(void * data,u64 * val)3707 static int disable_hpd_get(void *data, u64 *val)
3708 {
3709 struct amdgpu_device *adev = data;
3710
3711 *val = adev->dm.disable_hpd_irq;
3712
3713 return 0;
3714 }
3715
3716 DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get,
3717 disable_hpd_set, "%llu\n");
3718
3719 /*
3720 * Prints hardware capabilities. These are used for IGT testing.
3721 */
capabilities_show(struct seq_file * m,void * unused)3722 static int capabilities_show(struct seq_file *m, void *unused)
3723 {
3724 struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
3725 struct dc *dc = adev->dm.dc;
3726 bool mall_supported = dc->caps.mall_size_total;
3727 bool subvp_supported = dc->caps.subvp_fw_processing_delay_us;
3728 unsigned int mall_in_use = false;
3729 unsigned int subvp_in_use = false;
3730
3731 struct hubbub *hubbub = dc->res_pool->hubbub;
3732
3733 if (hubbub->funcs->get_mall_en)
3734 hubbub->funcs->get_mall_en(hubbub, &mall_in_use);
3735
3736 if (dc->cap_funcs.get_subvp_en)
3737 subvp_in_use = dc->cap_funcs.get_subvp_en(dc, dc->current_state);
3738
3739 seq_printf(m, "mall supported: %s, enabled: %s\n",
3740 mall_supported ? "yes" : "no", mall_in_use ? "yes" : "no");
3741 seq_printf(m, "sub-viewport supported: %s, enabled: %s\n",
3742 subvp_supported ? "yes" : "no", subvp_in_use ? "yes" : "no");
3743
3744 return 0;
3745 }
3746
3747 DEFINE_SHOW_ATTRIBUTE(capabilities);
3748
3749 /*
3750 * Temporary w/a to force sst sequence in M42D DP2 mst receiver
3751 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_set_mst_en_for_sst
3752 */
dp_force_sst_set(void * data,u64 val)3753 static int dp_force_sst_set(void *data, u64 val)
3754 {
3755 struct amdgpu_device *adev = data;
3756
3757 adev->dm.dc->debug.set_mst_en_for_sst = val;
3758
3759 return 0;
3760 }
3761
dp_force_sst_get(void * data,u64 * val)3762 static int dp_force_sst_get(void *data, u64 *val)
3763 {
3764 struct amdgpu_device *adev = data;
3765
3766 *val = adev->dm.dc->debug.set_mst_en_for_sst;
3767
3768 return 0;
3769 }
3770 DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get,
3771 dp_force_sst_set, "%llu\n");
3772
3773 /*
3774 * Force DP2 sequence without VESA certified cable.
3775 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_ignore_cable_id
3776 */
dp_ignore_cable_id_set(void * data,u64 val)3777 static int dp_ignore_cable_id_set(void *data, u64 val)
3778 {
3779 struct amdgpu_device *adev = data;
3780
3781 adev->dm.dc->debug.ignore_cable_id = val;
3782
3783 return 0;
3784 }
3785
dp_ignore_cable_id_get(void * data,u64 * val)3786 static int dp_ignore_cable_id_get(void *data, u64 *val)
3787 {
3788 struct amdgpu_device *adev = data;
3789
3790 *val = adev->dm.dc->debug.ignore_cable_id;
3791
3792 return 0;
3793 }
3794 DEFINE_DEBUGFS_ATTRIBUTE(dp_ignore_cable_id_ops, dp_ignore_cable_id_get,
3795 dp_ignore_cable_id_set, "%llu\n");
3796
3797 /*
3798 * Sets the DC visual confirm debug option from the given string.
3799 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm
3800 */
visual_confirm_set(void * data,u64 val)3801 static int visual_confirm_set(void *data, u64 val)
3802 {
3803 struct amdgpu_device *adev = data;
3804
3805 adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val;
3806
3807 return 0;
3808 }
3809
3810 /*
3811 * Reads the DC visual confirm debug option value into the given buffer.
3812 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm
3813 */
visual_confirm_get(void * data,u64 * val)3814 static int visual_confirm_get(void *data, u64 *val)
3815 {
3816 struct amdgpu_device *adev = data;
3817
3818 *val = adev->dm.dc->debug.visual_confirm;
3819
3820 return 0;
3821 }
3822
3823 DEFINE_SHOW_ATTRIBUTE(mst_topo);
3824 DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get,
3825 visual_confirm_set, "%llu\n");
3826
3827
3828 /*
3829 * Sets the DC skip_detection_link_training debug option from the given string.
3830 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_skip_detection_link_training
3831 */
skip_detection_link_training_set(void * data,u64 val)3832 static int skip_detection_link_training_set(void *data, u64 val)
3833 {
3834 struct amdgpu_device *adev = data;
3835
3836 if (val == 0)
3837 adev->dm.dc->debug.skip_detection_link_training = false;
3838 else
3839 adev->dm.dc->debug.skip_detection_link_training = true;
3840
3841 return 0;
3842 }
3843
3844 /*
3845 * Reads the DC skip_detection_link_training debug option value into the given buffer.
3846 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_skip_detection_link_training
3847 */
skip_detection_link_training_get(void * data,u64 * val)3848 static int skip_detection_link_training_get(void *data, u64 *val)
3849 {
3850 struct amdgpu_device *adev = data;
3851
3852 *val = adev->dm.dc->debug.skip_detection_link_training;
3853
3854 return 0;
3855 }
3856
3857 DEFINE_DEBUGFS_ATTRIBUTE(skip_detection_link_training_fops,
3858 skip_detection_link_training_get,
3859 skip_detection_link_training_set, "%llu\n");
3860
3861 /*
3862 * Dumps the DCC_EN bit for each pipe.
3863 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dcc_en
3864 */
dcc_en_bits_read(struct file * f,char __user * buf,size_t size,loff_t * pos)3865 static ssize_t dcc_en_bits_read(
3866 struct file *f,
3867 char __user *buf,
3868 size_t size,
3869 loff_t *pos)
3870 {
3871 struct amdgpu_device *adev = file_inode(f)->i_private;
3872 struct dc *dc = adev->dm.dc;
3873 char *rd_buf = NULL;
3874 const uint32_t rd_buf_size = 32;
3875 uint32_t result = 0;
3876 int offset = 0;
3877 int num_pipes = dc->res_pool->pipe_count;
3878 int *dcc_en_bits;
3879 int i, r;
3880
3881 dcc_en_bits = kcalloc(num_pipes, sizeof(int), GFP_KERNEL);
3882 if (!dcc_en_bits)
3883 return -ENOMEM;
3884
3885 if (!dc->hwss.get_dcc_en_bits) {
3886 kfree(dcc_en_bits);
3887 return 0;
3888 }
3889
3890 dc->hwss.get_dcc_en_bits(dc, dcc_en_bits);
3891
3892 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
3893 if (!rd_buf) {
3894 kfree(dcc_en_bits);
3895 return -ENOMEM;
3896 }
3897
3898 for (i = 0; i < num_pipes; i++)
3899 offset += snprintf(rd_buf + offset, rd_buf_size - offset,
3900 "%d ", dcc_en_bits[i]);
3901 rd_buf[strlen(rd_buf)] = '\n';
3902
3903 kfree(dcc_en_bits);
3904
3905 while (size) {
3906 if (*pos >= rd_buf_size)
3907 break;
3908 r = put_user(*(rd_buf + result), buf);
3909 if (r) {
3910 kfree(rd_buf);
3911 return r; /* r = -EFAULT */
3912 }
3913 buf += 1;
3914 size -= 1;
3915 *pos += 1;
3916 result += 1;
3917 }
3918
3919 kfree(rd_buf);
3920 return result;
3921 }
3922
dtn_debugfs_init(struct amdgpu_device * adev)3923 void dtn_debugfs_init(struct amdgpu_device *adev)
3924 {
3925 static const struct file_operations dtn_log_fops = {
3926 .owner = THIS_MODULE,
3927 .read = dtn_log_read,
3928 .write = dtn_log_write,
3929 .llseek = default_llseek
3930 };
3931 static const struct file_operations dcc_en_bits_fops = {
3932 .owner = THIS_MODULE,
3933 .read = dcc_en_bits_read,
3934 .llseek = default_llseek
3935 };
3936
3937 struct drm_minor *minor = adev_to_drm(adev)->primary;
3938 struct dentry *root = minor->debugfs_root;
3939
3940 debugfs_create_file("amdgpu_mst_topology", 0444, root,
3941 adev, &mst_topo_fops);
3942 debugfs_create_file("amdgpu_dm_capabilities", 0444, root,
3943 adev, &capabilities_fops);
3944 debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev,
3945 &dtn_log_fops);
3946 debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev,
3947 &dp_set_mst_en_for_sst_ops);
3948 debugfs_create_file("amdgpu_dm_dp_ignore_cable_id", 0644, root, adev,
3949 &dp_ignore_cable_id_ops);
3950
3951 debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
3952 &visual_confirm_fops);
3953
3954 debugfs_create_file_unsafe("amdgpu_dm_skip_detection_link_training", 0644, root, adev,
3955 &skip_detection_link_training_fops);
3956
3957 debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root,
3958 adev, &dmub_tracebuffer_fops);
3959
3960 debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root,
3961 adev, &dmub_fw_state_fops);
3962
3963 debugfs_create_file_unsafe("amdgpu_dm_force_timing_sync", 0644, root,
3964 adev, &force_timing_sync_ops);
3965
3966 debugfs_create_file_unsafe("amdgpu_dm_dmub_trace_mask", 0644, root,
3967 adev, &dmub_trace_mask_fops);
3968
3969 debugfs_create_file_unsafe("amdgpu_dm_dmcub_trace_event_en", 0644, root,
3970 adev, &dmcub_trace_event_state_fops);
3971
3972 debugfs_create_file_unsafe("amdgpu_dm_trigger_hpd_mst", 0644, root,
3973 adev, &trigger_hpd_mst_ops);
3974
3975 debugfs_create_file_unsafe("amdgpu_dm_dcc_en", 0644, root, adev,
3976 &dcc_en_bits_fops);
3977
3978 debugfs_create_file_unsafe("amdgpu_dm_disable_hpd", 0644, root, adev,
3979 &disable_hpd_ops);
3980
3981 }
3982