drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

   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  */
  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  */
 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
 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                                            &param_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
 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  */
 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                                            &param_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  */
 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
 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
 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                                            &param_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  */
 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                                            &param_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  */
 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  */
 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  */
 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  */
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  */
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  */
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                                            &param, buf,
1141                                            max_param_num,
1142                                            &param_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  */
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  */
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  */
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  */
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  */
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  */
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                                                 &param_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  */
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 = 10;
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                     pipe_ctx->stream->sink &&
1500                     pipe_ctx->stream->sink == aconnector->dc_sink)
1501                         break;
1502         }
1503
1504         dsc = pipe_ctx->stream_res.dsc;
1505         if (dsc)
1506                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1507
1508         snprintf(rd_buf_ptr, str_len,
1509                 "%d\n",
1510                 dsc_state.dsc_clock_en);
1511         rd_buf_ptr += str_len;
1512
1513         while (size) {
1514                 if (*pos >= rd_buf_size)
1515                         break;
1516
1517                 r = put_user(*(rd_buf + result), buf);
1518                 if (r) {
1519                         kfree(rd_buf);
1520                         return r; /* r = -EFAULT */
1521                 }
1522
1523                 buf += 1;
1524                 size -= 1;
1525                 *pos += 1;
1526                 result += 1;
1527         }
1528
1529         kfree(rd_buf);
1530         return result;
1531 }
1532
1533 /* function: write force DSC on the connector
1534  *
1535  * The write function: dp_dsc_clock_en_write
1536  * enables to force DSC on the connector.
1537  * User can write to either force enable or force disable DSC
1538  * on the next modeset or set it to driver default
1539  *
1540  * Accepted inputs:
1541  * 0 - default DSC enablement policy
1542  * 1 - force enable DSC on the connector
1543  * 2 - force disable DSC on the connector (might cause fail in atomic_check)
1544  *
1545  * Writing DSC settings is done with the following command:
1546  * - To force enable DSC (you need to specify
1547  * connector like DP-1):
1548  *
1549  *      echo 0x1 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en
1550  *
1551  * - To return to default state set the flag to zero and
1552  * let driver deal with DSC automatically
1553  * (you need to specify connector like DP-1):
1554  *
1555  *      echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en
1556  *
1557  */
1558 static ssize_t dp_dsc_clock_en_write(struct file *f, const char __user *buf,
1559                                      size_t size, loff_t *pos)
1560 {
1561         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1562         struct drm_connector *connector = &aconnector->base;
1563         struct drm_device *dev = connector->dev;
1564         struct drm_crtc *crtc = NULL;
1565         struct dm_crtc_state *dm_crtc_state = NULL;
1566         struct pipe_ctx *pipe_ctx;
1567         int i;
1568         char *wr_buf = NULL;
1569         uint32_t wr_buf_size = 42;
1570         int max_param_num = 1;
1571         long param[1] = {0};
1572         uint8_t param_nums = 0;
1573
1574         if (size == 0)
1575                 return -EINVAL;
1576
1577         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1578
1579         if (!wr_buf) {
1580                 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1581                 return -ENOSPC;
1582         }
1583
1584         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1585                                             (long *)param, buf,
1586                                             max_param_num,
1587                                             &param_nums)) {
1588                 kfree(wr_buf);
1589                 return -EINVAL;
1590         }
1591
1592         if (param_nums <= 0) {
1593                 DRM_DEBUG_DRIVER("user data not be read\n");
1594                 kfree(wr_buf);
1595                 return -EINVAL;
1596         }
1597
1598         for (i = 0; i < MAX_PIPES; i++) {
1599                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1600                 if (pipe_ctx->stream &&
1601                     pipe_ctx->stream->link == aconnector->dc_link &&
1602                     pipe_ctx->stream->sink &&
1603                     pipe_ctx->stream->sink == aconnector->dc_sink)
1604                         break;
1605         }
1606
1607         if (!pipe_ctx->stream)
1608                 goto done;
1609
1610         // Get CRTC state
1611         mutex_lock(&dev->mode_config.mutex);
1612         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1613
1614         if (connector->state == NULL)
1615                 goto unlock;
1616
1617         crtc = connector->state->crtc;
1618         if (crtc == NULL)
1619                 goto unlock;
1620
1621         drm_modeset_lock(&crtc->mutex, NULL);
1622         if (crtc->state == NULL)
1623                 goto unlock;
1624
1625         dm_crtc_state = to_dm_crtc_state(crtc->state);
1626         if (dm_crtc_state->stream == NULL)
1627                 goto unlock;
1628
1629         if (param[0] == 1)
1630                 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_ENABLE;
1631         else if (param[0] == 2)
1632                 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DISABLE;
1633         else
1634                 aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DEFAULT;
1635
1636         dm_crtc_state->dsc_force_changed = true;
1637
1638 unlock:
1639         if (crtc)
1640                 drm_modeset_unlock(&crtc->mutex);
1641         drm_modeset_unlock(&dev->mode_config.connection_mutex);
1642         mutex_unlock(&dev->mode_config.mutex);
1643
1644 done:
1645         kfree(wr_buf);
1646         return size;
1647 }
1648
1649 /* function: read DSC slice width parameter on the connector
1650  *
1651  * The read function: dp_dsc_slice_width_read
1652  * returns dsc slice width used in the current configuration
1653  * The return is an integer: 0 or other positive number
1654  *
1655  * Access the status with the following command:
1656  *
1657  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1658  *
1659  * 0 - means that DSC is disabled
1660  *
1661  * Any other number more than zero represents the
1662  * slice width currently used by DSC in pixels
1663  *
1664  */
1665 static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf,
1666                                     size_t size, loff_t *pos)
1667 {
1668         char *rd_buf = NULL;
1669         char *rd_buf_ptr = NULL;
1670         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1671         struct display_stream_compressor *dsc;
1672         struct dcn_dsc_state dsc_state = {0};
1673         const uint32_t rd_buf_size = 100;
1674         struct pipe_ctx *pipe_ctx;
1675         ssize_t result = 0;
1676         int i, r, str_len = 30;
1677
1678         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
1679
1680         if (!rd_buf)
1681                 return -ENOMEM;
1682
1683         rd_buf_ptr = rd_buf;
1684
1685         for (i = 0; i < MAX_PIPES; i++) {
1686                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1687                 if (pipe_ctx->stream &&
1688                     pipe_ctx->stream->link == aconnector->dc_link &&
1689                     pipe_ctx->stream->sink &&
1690                     pipe_ctx->stream->sink == aconnector->dc_sink)
1691                         break;
1692         }
1693
1694         dsc = pipe_ctx->stream_res.dsc;
1695         if (dsc)
1696                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1697
1698         snprintf(rd_buf_ptr, str_len,
1699                 "%d\n",
1700                 dsc_state.dsc_slice_width);
1701         rd_buf_ptr += str_len;
1702
1703         while (size) {
1704                 if (*pos >= rd_buf_size)
1705                         break;
1706
1707                 r = put_user(*(rd_buf + result), buf);
1708                 if (r) {
1709                         kfree(rd_buf);
1710                         return r; /* r = -EFAULT */
1711                 }
1712
1713                 buf += 1;
1714                 size -= 1;
1715                 *pos += 1;
1716                 result += 1;
1717         }
1718
1719         kfree(rd_buf);
1720         return result;
1721 }
1722
1723 /* function: write DSC slice width parameter
1724  *
1725  * The write function: dp_dsc_slice_width_write
1726  * overwrites automatically generated DSC configuration
1727  * of slice width.
1728  *
1729  * The user has to write the slice width divisible by the
1730  * picture width.
1731  *
1732  * Also the user has to write width in hexidecimal
1733  * rather than in decimal.
1734  *
1735  * Writing DSC settings is done with the following command:
1736  * - To force overwrite slice width: (example sets to 1920 pixels)
1737  *
1738  *      echo 0x780 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1739  *
1740  *  - To stop overwriting and let driver find the optimal size,
1741  * set the width to zero:
1742  *
1743  *      echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width
1744  *
1745  */
1746 static ssize_t dp_dsc_slice_width_write(struct file *f, const char __user *buf,
1747                                      size_t size, loff_t *pos)
1748 {
1749         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1750         struct pipe_ctx *pipe_ctx;
1751         struct drm_connector *connector = &aconnector->base;
1752         struct drm_device *dev = connector->dev;
1753         struct drm_crtc *crtc = NULL;
1754         struct dm_crtc_state *dm_crtc_state = NULL;
1755         int i;
1756         char *wr_buf = NULL;
1757         uint32_t wr_buf_size = 42;
1758         int max_param_num = 1;
1759         long param[1] = {0};
1760         uint8_t param_nums = 0;
1761
1762         if (size == 0)
1763                 return -EINVAL;
1764
1765         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1766
1767         if (!wr_buf) {
1768                 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1769                 return -ENOSPC;
1770         }
1771
1772         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1773                                             (long *)param, buf,
1774                                             max_param_num,
1775                                             &param_nums)) {
1776                 kfree(wr_buf);
1777                 return -EINVAL;
1778         }
1779
1780         if (param_nums <= 0) {
1781                 DRM_DEBUG_DRIVER("user data not be read\n");
1782                 kfree(wr_buf);
1783                 return -EINVAL;
1784         }
1785
1786         for (i = 0; i < MAX_PIPES; i++) {
1787                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1788                 if (pipe_ctx->stream &&
1789                     pipe_ctx->stream->link == aconnector->dc_link &&
1790                     pipe_ctx->stream->sink &&
1791                     pipe_ctx->stream->sink == aconnector->dc_sink)
1792                         break;
1793         }
1794
1795         if (!pipe_ctx->stream)
1796                 goto done;
1797
1798         // Safely get CRTC state
1799         mutex_lock(&dev->mode_config.mutex);
1800         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1801
1802         if (connector->state == NULL)
1803                 goto unlock;
1804
1805         crtc = connector->state->crtc;
1806         if (crtc == NULL)
1807                 goto unlock;
1808
1809         drm_modeset_lock(&crtc->mutex, NULL);
1810         if (crtc->state == NULL)
1811                 goto unlock;
1812
1813         dm_crtc_state = to_dm_crtc_state(crtc->state);
1814         if (dm_crtc_state->stream == NULL)
1815                 goto unlock;
1816
1817         if (param[0] > 0)
1818                 aconnector->dsc_settings.dsc_num_slices_h = DIV_ROUND_UP(
1819                                         pipe_ctx->stream->timing.h_addressable,
1820                                         param[0]);
1821         else
1822                 aconnector->dsc_settings.dsc_num_slices_h = 0;
1823
1824         dm_crtc_state->dsc_force_changed = true;
1825
1826 unlock:
1827         if (crtc)
1828                 drm_modeset_unlock(&crtc->mutex);
1829         drm_modeset_unlock(&dev->mode_config.connection_mutex);
1830         mutex_unlock(&dev->mode_config.mutex);
1831
1832 done:
1833         kfree(wr_buf);
1834         return size;
1835 }
1836
1837 /* function: read DSC slice height parameter on the connector
1838  *
1839  * The read function: dp_dsc_slice_height_read
1840  * returns dsc slice height used in the current configuration
1841  * The return is an integer: 0 or other positive number
1842  *
1843  * Access the status with the following command:
1844  *
1845  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1846  *
1847  * 0 - means that DSC is disabled
1848  *
1849  * Any other number more than zero represents the
1850  * slice height currently used by DSC in pixels
1851  *
1852  */
1853 static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf,
1854                                     size_t size, loff_t *pos)
1855 {
1856         char *rd_buf = NULL;
1857         char *rd_buf_ptr = NULL;
1858         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1859         struct display_stream_compressor *dsc;
1860         struct dcn_dsc_state dsc_state = {0};
1861         const uint32_t rd_buf_size = 100;
1862         struct pipe_ctx *pipe_ctx;
1863         ssize_t result = 0;
1864         int i, r, str_len = 30;
1865
1866         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
1867
1868         if (!rd_buf)
1869                 return -ENOMEM;
1870
1871         rd_buf_ptr = rd_buf;
1872
1873         for (i = 0; i < MAX_PIPES; i++) {
1874                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1875                 if (pipe_ctx->stream &&
1876                     pipe_ctx->stream->link == aconnector->dc_link &&
1877                     pipe_ctx->stream->sink &&
1878                     pipe_ctx->stream->sink == aconnector->dc_sink)
1879                         break;
1880         }
1881
1882         dsc = pipe_ctx->stream_res.dsc;
1883         if (dsc)
1884                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
1885
1886         snprintf(rd_buf_ptr, str_len,
1887                 "%d\n",
1888                 dsc_state.dsc_slice_height);
1889         rd_buf_ptr += str_len;
1890
1891         while (size) {
1892                 if (*pos >= rd_buf_size)
1893                         break;
1894
1895                 r = put_user(*(rd_buf + result), buf);
1896                 if (r) {
1897                         kfree(rd_buf);
1898                         return r; /* r = -EFAULT */
1899                 }
1900
1901                 buf += 1;
1902                 size -= 1;
1903                 *pos += 1;
1904                 result += 1;
1905         }
1906
1907         kfree(rd_buf);
1908         return result;
1909 }
1910
1911 /* function: write DSC slice height parameter
1912  *
1913  * The write function: dp_dsc_slice_height_write
1914  * overwrites automatically generated DSC configuration
1915  * of slice height.
1916  *
1917  * The user has to write the slice height divisible by the
1918  * picture height.
1919  *
1920  * Also the user has to write height in hexidecimal
1921  * rather than in decimal.
1922  *
1923  * Writing DSC settings is done with the following command:
1924  * - To force overwrite slice height (example sets to 128 pixels):
1925  *
1926  *      echo 0x80 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1927  *
1928  *  - To stop overwriting and let driver find the optimal size,
1929  * set the height to zero:
1930  *
1931  *      echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height
1932  *
1933  */
1934 static ssize_t dp_dsc_slice_height_write(struct file *f, const char __user *buf,
1935                                      size_t size, loff_t *pos)
1936 {
1937         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
1938         struct drm_connector *connector = &aconnector->base;
1939         struct drm_device *dev = connector->dev;
1940         struct drm_crtc *crtc = NULL;
1941         struct dm_crtc_state *dm_crtc_state = NULL;
1942         struct pipe_ctx *pipe_ctx;
1943         int i;
1944         char *wr_buf = NULL;
1945         uint32_t wr_buf_size = 42;
1946         int max_param_num = 1;
1947         uint8_t param_nums = 0;
1948         long param[1] = {0};
1949
1950         if (size == 0)
1951                 return -EINVAL;
1952
1953         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
1954
1955         if (!wr_buf) {
1956                 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
1957                 return -ENOSPC;
1958         }
1959
1960         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
1961                                             (long *)param, buf,
1962                                             max_param_num,
1963                                             &param_nums)) {
1964                 kfree(wr_buf);
1965                 return -EINVAL;
1966         }
1967
1968         if (param_nums <= 0) {
1969                 DRM_DEBUG_DRIVER("user data not be read\n");
1970                 kfree(wr_buf);
1971                 return -EINVAL;
1972         }
1973
1974         for (i = 0; i < MAX_PIPES; i++) {
1975                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
1976                 if (pipe_ctx->stream &&
1977                     pipe_ctx->stream->link == aconnector->dc_link &&
1978                     pipe_ctx->stream->sink &&
1979                     pipe_ctx->stream->sink == aconnector->dc_sink)
1980                         break;
1981         }
1982
1983         if (!pipe_ctx->stream)
1984                 goto done;
1985
1986         // Get CRTC state
1987         mutex_lock(&dev->mode_config.mutex);
1988         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1989
1990         if (connector->state == NULL)
1991                 goto unlock;
1992
1993         crtc = connector->state->crtc;
1994         if (crtc == NULL)
1995                 goto unlock;
1996
1997         drm_modeset_lock(&crtc->mutex, NULL);
1998         if (crtc->state == NULL)
1999                 goto unlock;
2000
2001         dm_crtc_state = to_dm_crtc_state(crtc->state);
2002         if (dm_crtc_state->stream == NULL)
2003                 goto unlock;
2004
2005         if (param[0] > 0)
2006                 aconnector->dsc_settings.dsc_num_slices_v = DIV_ROUND_UP(
2007                                         pipe_ctx->stream->timing.v_addressable,
2008                                         param[0]);
2009         else
2010                 aconnector->dsc_settings.dsc_num_slices_v = 0;
2011
2012         dm_crtc_state->dsc_force_changed = true;
2013
2014 unlock:
2015         if (crtc)
2016                 drm_modeset_unlock(&crtc->mutex);
2017         drm_modeset_unlock(&dev->mode_config.connection_mutex);
2018         mutex_unlock(&dev->mode_config.mutex);
2019
2020 done:
2021         kfree(wr_buf);
2022         return size;
2023 }
2024
2025 /* function: read DSC target rate on the connector in bits per pixel
2026  *
2027  * The read function: dp_dsc_bits_per_pixel_read
2028  * returns target rate of compression in bits per pixel
2029  * The return is an integer: 0 or other positive integer
2030  *
2031  * Access it with the following command:
2032  *
2033  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2034  *
2035  *  0 - means that DSC is disabled
2036  */
2037 static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf,
2038                                     size_t size, loff_t *pos)
2039 {
2040         char *rd_buf = NULL;
2041         char *rd_buf_ptr = NULL;
2042         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2043         struct display_stream_compressor *dsc;
2044         struct dcn_dsc_state dsc_state = {0};
2045         const uint32_t rd_buf_size = 100;
2046         struct pipe_ctx *pipe_ctx;
2047         ssize_t result = 0;
2048         int i, r, str_len = 30;
2049
2050         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2051
2052         if (!rd_buf)
2053                 return -ENOMEM;
2054
2055         rd_buf_ptr = rd_buf;
2056
2057         for (i = 0; i < MAX_PIPES; i++) {
2058                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2059                 if (pipe_ctx->stream &&
2060                     pipe_ctx->stream->link == aconnector->dc_link &&
2061                     pipe_ctx->stream->sink &&
2062                     pipe_ctx->stream->sink == aconnector->dc_sink)
2063                         break;
2064         }
2065
2066         dsc = pipe_ctx->stream_res.dsc;
2067         if (dsc)
2068                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2069
2070         snprintf(rd_buf_ptr, str_len,
2071                 "%d\n",
2072                 dsc_state.dsc_bits_per_pixel);
2073         rd_buf_ptr += str_len;
2074
2075         while (size) {
2076                 if (*pos >= rd_buf_size)
2077                         break;
2078
2079                 r = put_user(*(rd_buf + result), buf);
2080                 if (r) {
2081                         kfree(rd_buf);
2082                         return r; /* r = -EFAULT */
2083                 }
2084
2085                 buf += 1;
2086                 size -= 1;
2087                 *pos += 1;
2088                 result += 1;
2089         }
2090
2091         kfree(rd_buf);
2092         return result;
2093 }
2094
2095 /* function: write DSC target rate in bits per pixel
2096  *
2097  * The write function: dp_dsc_bits_per_pixel_write
2098  * overwrites automatically generated DSC configuration
2099  * of DSC target bit rate.
2100  *
2101  * Also the user has to write bpp in hexidecimal
2102  * rather than in decimal.
2103  *
2104  * Writing DSC settings is done with the following command:
2105  * - To force overwrite rate (example sets to 256 bpp x 1/16):
2106  *
2107  *      echo 0x100 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2108  *
2109  *  - To stop overwriting and let driver find the optimal rate,
2110  * set the rate to zero:
2111  *
2112  *      echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel
2113  *
2114  */
2115 static ssize_t dp_dsc_bits_per_pixel_write(struct file *f, const char __user *buf,
2116                                      size_t size, loff_t *pos)
2117 {
2118         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2119         struct drm_connector *connector = &aconnector->base;
2120         struct drm_device *dev = connector->dev;
2121         struct drm_crtc *crtc = NULL;
2122         struct dm_crtc_state *dm_crtc_state = NULL;
2123         struct pipe_ctx *pipe_ctx;
2124         int i;
2125         char *wr_buf = NULL;
2126         uint32_t wr_buf_size = 42;
2127         int max_param_num = 1;
2128         uint8_t param_nums = 0;
2129         long param[1] = {0};
2130
2131         if (size == 0)
2132                 return -EINVAL;
2133
2134         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
2135
2136         if (!wr_buf) {
2137                 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
2138                 return -ENOSPC;
2139         }
2140
2141         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
2142                                             (long *)param, buf,
2143                                             max_param_num,
2144                                             &param_nums)) {
2145                 kfree(wr_buf);
2146                 return -EINVAL;
2147         }
2148
2149         if (param_nums <= 0) {
2150                 DRM_DEBUG_DRIVER("user data not be read\n");
2151                 kfree(wr_buf);
2152                 return -EINVAL;
2153         }
2154
2155         for (i = 0; i < MAX_PIPES; i++) {
2156                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2157                 if (pipe_ctx->stream &&
2158                     pipe_ctx->stream->link == aconnector->dc_link &&
2159                     pipe_ctx->stream->sink &&
2160                     pipe_ctx->stream->sink == aconnector->dc_sink)
2161                         break;
2162         }
2163
2164         if (!pipe_ctx->stream)
2165                 goto done;
2166
2167         // Get CRTC state
2168         mutex_lock(&dev->mode_config.mutex);
2169         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2170
2171         if (connector->state == NULL)
2172                 goto unlock;
2173
2174         crtc = connector->state->crtc;
2175         if (crtc == NULL)
2176                 goto unlock;
2177
2178         drm_modeset_lock(&crtc->mutex, NULL);
2179         if (crtc->state == NULL)
2180                 goto unlock;
2181
2182         dm_crtc_state = to_dm_crtc_state(crtc->state);
2183         if (dm_crtc_state->stream == NULL)
2184                 goto unlock;
2185
2186         aconnector->dsc_settings.dsc_bits_per_pixel = param[0];
2187
2188         dm_crtc_state->dsc_force_changed = true;
2189
2190 unlock:
2191         if (crtc)
2192                 drm_modeset_unlock(&crtc->mutex);
2193         drm_modeset_unlock(&dev->mode_config.connection_mutex);
2194         mutex_unlock(&dev->mode_config.mutex);
2195
2196 done:
2197         kfree(wr_buf);
2198         return size;
2199 }
2200
2201 /* function: read DSC picture width parameter on the connector
2202  *
2203  * The read function: dp_dsc_pic_width_read
2204  * returns dsc picture width used in the current configuration
2205  * It is the same as h_addressable of the current
2206  * display's timing
2207  * The return is an integer: 0 or other positive integer
2208  * If 0 then DSC is disabled.
2209  *
2210  * Access it with the following command:
2211  *
2212  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_pic_width
2213  *
2214  * 0 - means that DSC is disabled
2215  */
2216 static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf,
2217                                     size_t size, loff_t *pos)
2218 {
2219         char *rd_buf = NULL;
2220         char *rd_buf_ptr = NULL;
2221         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2222         struct display_stream_compressor *dsc;
2223         struct dcn_dsc_state dsc_state = {0};
2224         const uint32_t rd_buf_size = 100;
2225         struct pipe_ctx *pipe_ctx;
2226         ssize_t result = 0;
2227         int i, r, str_len = 30;
2228
2229         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2230
2231         if (!rd_buf)
2232                 return -ENOMEM;
2233
2234         rd_buf_ptr = rd_buf;
2235
2236         for (i = 0; i < MAX_PIPES; i++) {
2237                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2238                 if (pipe_ctx->stream &&
2239                     pipe_ctx->stream->link == aconnector->dc_link &&
2240                     pipe_ctx->stream->sink &&
2241                     pipe_ctx->stream->sink == aconnector->dc_sink)
2242                         break;
2243         }
2244
2245         dsc = pipe_ctx->stream_res.dsc;
2246         if (dsc)
2247                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2248
2249         snprintf(rd_buf_ptr, str_len,
2250                 "%d\n",
2251                 dsc_state.dsc_pic_width);
2252         rd_buf_ptr += str_len;
2253
2254         while (size) {
2255                 if (*pos >= rd_buf_size)
2256                         break;
2257
2258                 r = put_user(*(rd_buf + result), buf);
2259                 if (r) {
2260                         kfree(rd_buf);
2261                         return r; /* r = -EFAULT */
2262                 }
2263
2264                 buf += 1;
2265                 size -= 1;
2266                 *pos += 1;
2267                 result += 1;
2268         }
2269
2270         kfree(rd_buf);
2271         return result;
2272 }
2273
2274 static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf,
2275                                     size_t size, loff_t *pos)
2276 {
2277         char *rd_buf = NULL;
2278         char *rd_buf_ptr = NULL;
2279         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2280         struct display_stream_compressor *dsc;
2281         struct dcn_dsc_state dsc_state = {0};
2282         const uint32_t rd_buf_size = 100;
2283         struct pipe_ctx *pipe_ctx;
2284         ssize_t result = 0;
2285         int i, r, str_len = 30;
2286
2287         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2288
2289         if (!rd_buf)
2290                 return -ENOMEM;
2291
2292         rd_buf_ptr = rd_buf;
2293
2294         for (i = 0; i < MAX_PIPES; i++) {
2295                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2296                 if (pipe_ctx->stream &&
2297                     pipe_ctx->stream->link == aconnector->dc_link &&
2298                     pipe_ctx->stream->sink &&
2299                     pipe_ctx->stream->sink == aconnector->dc_sink)
2300                         break;
2301         }
2302
2303         dsc = pipe_ctx->stream_res.dsc;
2304         if (dsc)
2305                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2306
2307         snprintf(rd_buf_ptr, str_len,
2308                 "%d\n",
2309                 dsc_state.dsc_pic_height);
2310         rd_buf_ptr += str_len;
2311
2312         while (size) {
2313                 if (*pos >= rd_buf_size)
2314                         break;
2315
2316                 r = put_user(*(rd_buf + result), buf);
2317                 if (r) {
2318                         kfree(rd_buf);
2319                         return r; /* r = -EFAULT */
2320                 }
2321
2322                 buf += 1;
2323                 size -= 1;
2324                 *pos += 1;
2325                 result += 1;
2326         }
2327
2328         kfree(rd_buf);
2329         return result;
2330 }
2331
2332 /* function: read DSC chunk size parameter on the connector
2333  *
2334  * The read function: dp_dsc_chunk_size_read
2335  * returns dsc chunk size set in the current configuration
2336  * The value is calculated automatically by DSC code
2337  * and depends on slice parameters and bpp target rate
2338  * The return is an integer: 0 or other positive integer
2339  * If 0 then DSC is disabled.
2340  *
2341  * Access it with the following command:
2342  *
2343  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_chunk_size
2344  *
2345  * 0 - means that DSC is disabled
2346  */
2347 static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf,
2348                                     size_t size, loff_t *pos)
2349 {
2350         char *rd_buf = NULL;
2351         char *rd_buf_ptr = NULL;
2352         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2353         struct display_stream_compressor *dsc;
2354         struct dcn_dsc_state dsc_state = {0};
2355         const uint32_t rd_buf_size = 100;
2356         struct pipe_ctx *pipe_ctx;
2357         ssize_t result = 0;
2358         int i, r, str_len = 30;
2359
2360         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2361
2362         if (!rd_buf)
2363                 return -ENOMEM;
2364
2365         rd_buf_ptr = rd_buf;
2366
2367         for (i = 0; i < MAX_PIPES; i++) {
2368                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2369                 if (pipe_ctx->stream &&
2370                     pipe_ctx->stream->link == aconnector->dc_link &&
2371                     pipe_ctx->stream->sink &&
2372                     pipe_ctx->stream->sink == aconnector->dc_sink)
2373                         break;
2374         }
2375
2376         dsc = pipe_ctx->stream_res.dsc;
2377         if (dsc)
2378                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2379
2380         snprintf(rd_buf_ptr, str_len,
2381                 "%d\n",
2382                 dsc_state.dsc_chunk_size);
2383         rd_buf_ptr += str_len;
2384
2385         while (size) {
2386                 if (*pos >= rd_buf_size)
2387                         break;
2388
2389                 r = put_user(*(rd_buf + result), buf);
2390                 if (r) {
2391                         kfree(rd_buf);
2392                         return r; /* r = -EFAULT */
2393                 }
2394
2395                 buf += 1;
2396                 size -= 1;
2397                 *pos += 1;
2398                 result += 1;
2399         }
2400
2401         kfree(rd_buf);
2402         return result;
2403 }
2404
2405 /* function: read DSC slice bpg offset on the connector
2406  *
2407  * The read function: dp_dsc_slice_bpg_offset_read
2408  * returns dsc bpg slice offset set in the current configuration
2409  * The value is calculated automatically by DSC code
2410  * and depends on slice parameters and bpp target rate
2411  * The return is an integer: 0 or other positive integer
2412  * If 0 then DSC is disabled.
2413  *
2414  * Access it with the following command:
2415  *
2416  *      cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_bpg_offset
2417  *
2418  * 0 - means that DSC is disabled
2419  */
2420 static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf,
2421                                     size_t size, loff_t *pos)
2422 {
2423         char *rd_buf = NULL;
2424         char *rd_buf_ptr = NULL;
2425         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2426         struct display_stream_compressor *dsc;
2427         struct dcn_dsc_state dsc_state = {0};
2428         const uint32_t rd_buf_size = 100;
2429         struct pipe_ctx *pipe_ctx;
2430         ssize_t result = 0;
2431         int i, r, str_len = 30;
2432
2433         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2434
2435         if (!rd_buf)
2436                 return -ENOMEM;
2437
2438         rd_buf_ptr = rd_buf;
2439
2440         for (i = 0; i < MAX_PIPES; i++) {
2441                 pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
2442                 if (pipe_ctx->stream &&
2443                     pipe_ctx->stream->link == aconnector->dc_link &&
2444                     pipe_ctx->stream->sink &&
2445                     pipe_ctx->stream->sink == aconnector->dc_sink)
2446                         break;
2447         }
2448
2449         dsc = pipe_ctx->stream_res.dsc;
2450         if (dsc)
2451                 dsc->funcs->dsc_read_state(dsc, &dsc_state);
2452
2453         snprintf(rd_buf_ptr, str_len,
2454                 "%d\n",
2455                 dsc_state.dsc_slice_bpg_offset);
2456         rd_buf_ptr += str_len;
2457
2458         while (size) {
2459                 if (*pos >= rd_buf_size)
2460                         break;
2461
2462                 r = put_user(*(rd_buf + result), buf);
2463                 if (r) {
2464                         kfree(rd_buf);
2465                         return r; /* r = -EFAULT */
2466                 }
2467
2468                 buf += 1;
2469                 size -= 1;
2470                 *pos += 1;
2471                 result += 1;
2472         }
2473
2474         kfree(rd_buf);
2475         return result;
2476 }
2477
2478
2479 /*
2480  * function description: Read max_requested_bpc property from the connector
2481  *
2482  * Access it with the following command:
2483  *
2484  *      cat /sys/kernel/debug/dri/0/DP-X/max_bpc
2485  *
2486  */
2487 static ssize_t dp_max_bpc_read(struct file *f, char __user *buf,
2488                 size_t size, loff_t *pos)
2489 {
2490         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2491         struct drm_connector *connector = &aconnector->base;
2492         struct drm_device *dev = connector->dev;
2493         struct dm_connector_state *state;
2494         ssize_t result = 0;
2495         char *rd_buf = NULL;
2496         char *rd_buf_ptr = NULL;
2497         const uint32_t rd_buf_size = 10;
2498         int r;
2499
2500         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
2501
2502         if (!rd_buf)
2503                 return -ENOMEM;
2504
2505         mutex_lock(&dev->mode_config.mutex);
2506         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2507
2508         if (connector->state == NULL)
2509                 goto unlock;
2510
2511         state = to_dm_connector_state(connector->state);
2512
2513         rd_buf_ptr = rd_buf;
2514         snprintf(rd_buf_ptr, rd_buf_size,
2515                 "%u\n",
2516                 state->base.max_requested_bpc);
2517
2518         while (size) {
2519                 if (*pos >= rd_buf_size)
2520                         break;
2521
2522                 r = put_user(*(rd_buf + result), buf);
2523                 if (r) {
2524                         result = r; /* r = -EFAULT */
2525                         goto unlock;
2526                 }
2527                 buf += 1;
2528                 size -= 1;
2529                 *pos += 1;
2530                 result += 1;
2531         }
2532 unlock:
2533         drm_modeset_unlock(&dev->mode_config.connection_mutex);
2534         mutex_unlock(&dev->mode_config.mutex);
2535         kfree(rd_buf);
2536         return result;
2537 }
2538
2539
2540 /*
2541  * function description: Set max_requested_bpc property on the connector
2542  *
2543  * This function will not force the input BPC on connector, it will only
2544  * change the max value. This is equivalent to setting max_bpc through
2545  * xrandr.
2546  *
2547  * The BPC value written must be >= 6 and <= 16. Values outside of this
2548  * range will result in errors.
2549  *
2550  * BPC values:
2551  *      0x6 - 6 BPC
2552  *      0x8 - 8 BPC
2553  *      0xa - 10 BPC
2554  *      0xc - 12 BPC
2555  *      0x10 - 16 BPC
2556  *
2557  * Write the max_bpc in the following way:
2558  *
2559  * echo 0x6 > /sys/kernel/debug/dri/0/DP-X/max_bpc
2560  *
2561  */
2562 static ssize_t dp_max_bpc_write(struct file *f, const char __user *buf,
2563                                      size_t size, loff_t *pos)
2564 {
2565         struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private;
2566         struct drm_connector *connector = &aconnector->base;
2567         struct dm_connector_state *state;
2568         struct drm_device *dev = connector->dev;
2569         char *wr_buf = NULL;
2570         uint32_t wr_buf_size = 42;
2571         int max_param_num = 1;
2572         long param[1] = {0};
2573         uint8_t param_nums = 0;
2574
2575         if (size == 0)
2576                 return -EINVAL;
2577
2578         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
2579
2580         if (!wr_buf) {
2581                 DRM_DEBUG_DRIVER("no memory to allocate write buffer\n");
2582                 return -ENOSPC;
2583         }
2584
2585         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
2586                                            (long *)param, buf,
2587                                            max_param_num,
2588                                            &param_nums)) {
2589                 kfree(wr_buf);
2590                 return -EINVAL;
2591         }
2592
2593         if (param_nums <= 0) {
2594                 DRM_DEBUG_DRIVER("user data not be read\n");
2595                 kfree(wr_buf);
2596                 return -EINVAL;
2597         }
2598
2599         if (param[0] < 6 || param[0] > 16) {
2600                 DRM_DEBUG_DRIVER("bad max_bpc value\n");
2601                 kfree(wr_buf);
2602                 return -EINVAL;
2603         }
2604
2605         mutex_lock(&dev->mode_config.mutex);
2606         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2607
2608         if (connector->state == NULL)
2609                 goto unlock;
2610
2611         state = to_dm_connector_state(connector->state);
2612         state->base.max_requested_bpc = param[0];
2613 unlock:
2614         drm_modeset_unlock(&dev->mode_config.connection_mutex);
2615         mutex_unlock(&dev->mode_config.mutex);
2616
2617         kfree(wr_buf);
2618         return size;
2619 }
2620
2621 /*
2622  * Backlight at this moment.  Read only.
2623  * As written to display, taking ABM and backlight lut into account.
2624  * Ranges from 0x0 to 0x10000 (= 100% PWM)
2625  *
2626  * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/current_backlight
2627  */
2628 static int current_backlight_show(struct seq_file *m, void *unused)
2629 {
2630         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
2631         struct dc_link *link = aconnector->dc_link;
2632         unsigned int backlight;
2633
2634         backlight = dc_link_get_backlight_level(link);
2635         seq_printf(m, "0x%x\n", backlight);
2636
2637         return 0;
2638 }
2639
2640 /*
2641  * Backlight value that is being approached.  Read only.
2642  * As written to display, taking ABM and backlight lut into account.
2643  * Ranges from 0x0 to 0x10000 (= 100% PWM)
2644  *
2645  * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/target_backlight
2646  */
2647 static int target_backlight_show(struct seq_file *m, void *unused)
2648 {
2649         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
2650         struct dc_link *link = aconnector->dc_link;
2651         unsigned int backlight;
2652
2653         backlight = dc_link_get_target_backlight_pwm(link);
2654         seq_printf(m, "0x%x\n", backlight);
2655
2656         return 0;
2657 }
2658
2659 /*
2660  * function description: Determine if the connector is mst connector
2661  *
2662  * This function helps to determine whether a connector is a mst connector.
2663  * - "root" stands for the root connector of the topology
2664  * - "branch" stands for branch device of the topology
2665  * - "end" stands for leaf node connector of the topology
2666  * - "no" stands for the connector is not a device of a mst topology
2667  * Access it with the following command:
2668  *
2669  *      cat /sys/kernel/debug/dri/0/DP-X/is_mst_connector
2670  *
2671  */
2672 static int dp_is_mst_connector_show(struct seq_file *m, void *unused)
2673 {
2674         struct drm_connector *connector = m->private;
2675         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2676         struct drm_dp_mst_topology_mgr *mgr = NULL;
2677         struct drm_dp_mst_port *port = NULL;
2678         char *role = NULL;
2679
2680         mutex_lock(&aconnector->hpd_lock);
2681
2682         if (aconnector->mst_mgr.mst_state) {
2683                 role = "root";
2684         } else if (aconnector->mst_root &&
2685                 aconnector->mst_root->mst_mgr.mst_state) {
2686
2687                 role = "end";
2688
2689                 mgr = &aconnector->mst_root->mst_mgr;
2690                 port = aconnector->mst_output_port;
2691
2692                 drm_modeset_lock(&mgr->base.lock, NULL);
2693                 if (port->pdt == DP_PEER_DEVICE_MST_BRANCHING &&
2694                         port->mcs)
2695                         role = "branch";
2696                 drm_modeset_unlock(&mgr->base.lock);
2697
2698         } else {
2699                 role = "no";
2700         }
2701
2702         seq_printf(m, "%s\n", role);
2703
2704         mutex_unlock(&aconnector->hpd_lock);
2705
2706         return 0;
2707 }
2708
2709 /*
2710  * function description: Read out the mst progress status
2711  *
2712  * This function helps to determine the mst progress status of
2713  * a mst connector.
2714  *
2715  * Access it with the following command:
2716  *
2717  *      cat /sys/kernel/debug/dri/0/DP-X/mst_progress_status
2718  *
2719  */
2720 static int dp_mst_progress_status_show(struct seq_file *m, void *unused)
2721 {
2722         struct drm_connector *connector = m->private;
2723         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2724         struct amdgpu_device *adev = drm_to_adev(connector->dev);
2725         int i;
2726
2727         mutex_lock(&aconnector->hpd_lock);
2728         mutex_lock(&adev->dm.dc_lock);
2729
2730         if (aconnector->mst_status == MST_STATUS_DEFAULT) {
2731                 seq_puts(m, "disabled\n");
2732         } else {
2733                 for (i = 0; i < sizeof(mst_progress_status)/sizeof(char *); i++)
2734                         seq_printf(m, "%s:%s\n",
2735                                 mst_progress_status[i],
2736                                 aconnector->mst_status & BIT(i) ? "done" : "not_done");
2737         }
2738
2739         mutex_unlock(&adev->dm.dc_lock);
2740         mutex_unlock(&aconnector->hpd_lock);
2741
2742         return 0;
2743 }
2744
2745 /*
2746  * Reports whether the connected display is a USB4 DPIA tunneled display
2747  * Example usage: cat /sys/kernel/debug/dri/0/DP-8/is_dpia_link
2748  */
2749 static int is_dpia_link_show(struct seq_file *m, void *data)
2750 {
2751         struct drm_connector *connector = m->private;
2752         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
2753         struct dc_link *link = aconnector->dc_link;
2754
2755         if (connector->status != connector_status_connected)
2756                 return -ENODEV;
2757
2758         seq_printf(m, "%s\n", (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ? "yes" :
2759                                 (link->ep_type == DISPLAY_ENDPOINT_PHY) ? "no" : "unknown");
2760
2761         return 0;
2762 }
2763
2764 DEFINE_SHOW_ATTRIBUTE(dp_dsc_fec_support);
2765 DEFINE_SHOW_ATTRIBUTE(dmub_fw_state);
2766 DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer);
2767 DEFINE_SHOW_ATTRIBUTE(dp_lttpr_status);
2768 DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);
2769 DEFINE_SHOW_ATTRIBUTE(internal_display);
2770 DEFINE_SHOW_ATTRIBUTE(odm_combine_segments);
2771 DEFINE_SHOW_ATTRIBUTE(psr_capability);
2772 DEFINE_SHOW_ATTRIBUTE(dp_is_mst_connector);
2773 DEFINE_SHOW_ATTRIBUTE(dp_mst_progress_status);
2774 DEFINE_SHOW_ATTRIBUTE(is_dpia_link);
2775
2776 static const struct file_operations dp_dsc_clock_en_debugfs_fops = {
2777         .owner = THIS_MODULE,
2778         .read = dp_dsc_clock_en_read,
2779         .write = dp_dsc_clock_en_write,
2780         .llseek = default_llseek
2781 };
2782
2783 static const struct file_operations dp_dsc_slice_width_debugfs_fops = {
2784         .owner = THIS_MODULE,
2785         .read = dp_dsc_slice_width_read,
2786         .write = dp_dsc_slice_width_write,
2787         .llseek = default_llseek
2788 };
2789
2790 static const struct file_operations dp_dsc_slice_height_debugfs_fops = {
2791         .owner = THIS_MODULE,
2792         .read = dp_dsc_slice_height_read,
2793         .write = dp_dsc_slice_height_write,
2794         .llseek = default_llseek
2795 };
2796
2797 static const struct file_operations dp_dsc_bits_per_pixel_debugfs_fops = {
2798         .owner = THIS_MODULE,
2799         .read = dp_dsc_bits_per_pixel_read,
2800         .write = dp_dsc_bits_per_pixel_write,
2801         .llseek = default_llseek
2802 };
2803
2804 static const struct file_operations dp_dsc_pic_width_debugfs_fops = {
2805         .owner = THIS_MODULE,
2806         .read = dp_dsc_pic_width_read,
2807         .llseek = default_llseek
2808 };
2809
2810 static const struct file_operations dp_dsc_pic_height_debugfs_fops = {
2811         .owner = THIS_MODULE,
2812         .read = dp_dsc_pic_height_read,
2813         .llseek = default_llseek
2814 };
2815
2816 static const struct file_operations dp_dsc_chunk_size_debugfs_fops = {
2817         .owner = THIS_MODULE,
2818         .read = dp_dsc_chunk_size_read,
2819         .llseek = default_llseek
2820 };
2821
2822 static const struct file_operations dp_dsc_slice_bpg_offset_debugfs_fops = {
2823         .owner = THIS_MODULE,
2824         .read = dp_dsc_slice_bpg_offset_read,
2825         .llseek = default_llseek
2826 };
2827
2828 static const struct file_operations trigger_hotplug_debugfs_fops = {
2829         .owner = THIS_MODULE,
2830         .write = trigger_hotplug,
2831         .llseek = default_llseek
2832 };
2833
2834 static const struct file_operations dp_link_settings_debugfs_fops = {
2835         .owner = THIS_MODULE,
2836         .read = dp_link_settings_read,
2837         .write = dp_link_settings_write,
2838         .llseek = default_llseek
2839 };
2840
2841 static const struct file_operations dp_phy_settings_debugfs_fop = {
2842         .owner = THIS_MODULE,
2843         .read = dp_phy_settings_read,
2844         .write = dp_phy_settings_write,
2845         .llseek = default_llseek
2846 };
2847
2848 static const struct file_operations dp_phy_test_pattern_fops = {
2849         .owner = THIS_MODULE,
2850         .write = dp_phy_test_pattern_debugfs_write,
2851         .llseek = default_llseek
2852 };
2853
2854 static const struct file_operations sdp_message_fops = {
2855         .owner = THIS_MODULE,
2856         .write = dp_sdp_message_debugfs_write,
2857         .llseek = default_llseek
2858 };
2859
2860 static const struct file_operations dp_max_bpc_debugfs_fops = {
2861         .owner = THIS_MODULE,
2862         .read = dp_max_bpc_read,
2863         .write = dp_max_bpc_write,
2864         .llseek = default_llseek
2865 };
2866
2867 static const struct file_operations dp_dsc_disable_passthrough_debugfs_fops = {
2868         .owner = THIS_MODULE,
2869         .write = dp_dsc_passthrough_set,
2870         .llseek = default_llseek
2871 };
2872
2873 static const struct file_operations dp_mst_link_settings_debugfs_fops = {
2874         .owner = THIS_MODULE,
2875         .write = dp_mst_link_setting,
2876         .llseek = default_llseek
2877 };
2878
2879 static const struct {
2880         char *name;
2881         const struct file_operations *fops;
2882 } dp_debugfs_entries[] = {
2883                 {"link_settings", &dp_link_settings_debugfs_fops},
2884                 {"phy_settings", &dp_phy_settings_debugfs_fop},
2885                 {"lttpr_status", &dp_lttpr_status_fops},
2886                 {"test_pattern", &dp_phy_test_pattern_fops},
2887                 {"hdcp_sink_capability", &hdcp_sink_capability_fops},
2888                 {"sdp_message", &sdp_message_fops},
2889                 {"dsc_clock_en", &dp_dsc_clock_en_debugfs_fops},
2890                 {"dsc_slice_width", &dp_dsc_slice_width_debugfs_fops},
2891                 {"dsc_slice_height", &dp_dsc_slice_height_debugfs_fops},
2892                 {"dsc_bits_per_pixel", &dp_dsc_bits_per_pixel_debugfs_fops},
2893                 {"dsc_pic_width", &dp_dsc_pic_width_debugfs_fops},
2894                 {"dsc_pic_height", &dp_dsc_pic_height_debugfs_fops},
2895                 {"dsc_chunk_size", &dp_dsc_chunk_size_debugfs_fops},
2896                 {"dsc_slice_bpg", &dp_dsc_slice_bpg_offset_debugfs_fops},
2897                 {"dp_dsc_fec_support", &dp_dsc_fec_support_fops},
2898                 {"max_bpc", &dp_max_bpc_debugfs_fops},
2899                 {"dsc_disable_passthrough", &dp_dsc_disable_passthrough_debugfs_fops},
2900                 {"is_mst_connector", &dp_is_mst_connector_fops},
2901                 {"mst_progress_status", &dp_mst_progress_status_fops},
2902                 {"is_dpia_link", &is_dpia_link_fops},
2903                 {"mst_link_settings", &dp_mst_link_settings_debugfs_fops}
2904 };
2905
2906 static const struct {
2907         char *name;
2908         const struct file_operations *fops;
2909 } hdmi_debugfs_entries[] = {
2910                 {"hdcp_sink_capability", &hdcp_sink_capability_fops}
2911 };
2912
2913 /*
2914  * Force YUV420 output if available from the given mode
2915  */
2916 static int force_yuv420_output_set(void *data, u64 val)
2917 {
2918         struct amdgpu_dm_connector *connector = data;
2919
2920         connector->force_yuv420_output = (bool)val;
2921
2922         return 0;
2923 }
2924
2925 /*
2926  * Check if YUV420 is forced when available from the given mode
2927  */
2928 static int force_yuv420_output_get(void *data, u64 *val)
2929 {
2930         struct amdgpu_dm_connector *connector = data;
2931
2932         *val = connector->force_yuv420_output;
2933
2934         return 0;
2935 }
2936
2937 DEFINE_DEBUGFS_ATTRIBUTE(force_yuv420_output_fops, force_yuv420_output_get,
2938                          force_yuv420_output_set, "%llu\n");
2939
2940 /*
2941  *  Read PSR state
2942  */
2943 static int psr_get(void *data, u64 *val)
2944 {
2945         struct amdgpu_dm_connector *connector = data;
2946         struct dc_link *link = connector->dc_link;
2947         enum dc_psr_state state = PSR_STATE0;
2948
2949         dc_link_get_psr_state(link, &state);
2950
2951         *val = state;
2952
2953         return 0;
2954 }
2955
2956 /*
2957  *  Read PSR state residency
2958  */
2959 static int psr_read_residency(void *data, u64 *val)
2960 {
2961         struct amdgpu_dm_connector *connector = data;
2962         struct dc_link *link = connector->dc_link;
2963         u32 residency;
2964
2965         link->dc->link_srv->edp_get_psr_residency(link, &residency);
2966
2967         *val = (u64)residency;
2968
2969         return 0;
2970 }
2971
2972 /* read allow_edp_hotplug_detection */
2973 static int allow_edp_hotplug_detection_get(void *data, u64 *val)
2974 {
2975         struct amdgpu_dm_connector *aconnector = data;
2976         struct drm_connector *connector = &aconnector->base;
2977         struct drm_device *dev = connector->dev;
2978         struct amdgpu_device *adev = drm_to_adev(dev);
2979
2980         *val = adev->dm.dc->config.allow_edp_hotplug_detection;
2981
2982         return 0;
2983 }
2984
2985 /* set allow_edp_hotplug_detection */
2986 static int allow_edp_hotplug_detection_set(void *data, u64 val)
2987 {
2988         struct amdgpu_dm_connector *aconnector = data;
2989         struct drm_connector *connector = &aconnector->base;
2990         struct drm_device *dev = connector->dev;
2991         struct amdgpu_device *adev = drm_to_adev(dev);
2992
2993         adev->dm.dc->config.allow_edp_hotplug_detection = (uint32_t) val;
2994
2995         return 0;
2996 }
2997
2998 /* check if kernel disallow eDP enter psr state
2999  * cat /sys/kernel/debug/dri/0/eDP-X/disallow_edp_enter_psr
3000  * 0: allow edp enter psr; 1: disallow
3001  */
3002 static int disallow_edp_enter_psr_get(void *data, u64 *val)
3003 {
3004         struct amdgpu_dm_connector *aconnector = data;
3005
3006         *val = (u64) aconnector->disallow_edp_enter_psr;
3007         return 0;
3008 }
3009
3010 /* set kernel disallow eDP enter psr state
3011  * echo 0x0 /sys/kernel/debug/dri/0/eDP-X/disallow_edp_enter_psr
3012  * 0: allow edp enter psr; 1: disallow
3013  *
3014  * usage: test app read crc from PSR eDP rx.
3015  *
3016  * during kernel boot up, kernel write dpcd 0x170 = 5.
3017  * this notify eDP rx psr enable and let rx check crc.
3018  * rx fw will start checking crc for rx internal logic.
3019  * crc read count within dpcd 0x246 is not updated and
3020  * value is 0. when eDP tx driver wants to read rx crc
3021  * from dpcd 0x246, 0x270, read count 0 lead tx driver
3022  * timeout.
3023  *
3024  * to avoid this, we add this debugfs to let test app to disbable
3025  * rx crc checking for rx internal logic. then test app can read
3026  * non-zero crc read count.
3027  *
3028  * expected app sequence is as below:
3029  * 1. disable eDP PHY and notify eDP rx with dpcd 0x600 = 2.
3030  * 2. echo 0x1 /sys/kernel/debug/dri/0/eDP-X/disallow_edp_enter_psr
3031  * 3. enable eDP PHY and notify eDP rx with dpcd 0x600 = 1 but
3032  *    without dpcd 0x170 = 5.
3033  * 4. read crc from rx dpcd 0x270, 0x246, etc.
3034  * 5. echo 0x0 /sys/kernel/debug/dri/0/eDP-X/disallow_edp_enter_psr.
3035  *    this will let eDP back to normal with psr setup dpcd 0x170 = 5.
3036  */
3037 static int disallow_edp_enter_psr_set(void *data, u64 val)
3038 {
3039         struct amdgpu_dm_connector *aconnector = data;
3040
3041         aconnector->disallow_edp_enter_psr = val ? true : false;
3042         return 0;
3043 }
3044
3045 static int dmub_trace_mask_set(void *data, u64 val)
3046 {
3047         struct amdgpu_device *adev = data;
3048         struct dmub_srv *srv = adev->dm.dc->ctx->dmub_srv->dmub;
3049         enum dmub_gpint_command cmd;
3050         u64 mask = 0xffff;
3051         u8 shift = 0;
3052         u32 res;
3053         int i;
3054
3055         if (!srv->fw_version)
3056                 return -EINVAL;
3057
3058         for (i = 0;  i < 4; i++) {
3059                 res = (val & mask) >> shift;
3060
3061                 switch (i) {
3062                 case 0:
3063                         cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD0;
3064                         break;
3065                 case 1:
3066                         cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD1;
3067                         break;
3068                 case 2:
3069                         cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD2;
3070                         break;
3071                 case 3:
3072                         cmd = DMUB_GPINT__SET_TRACE_BUFFER_MASK_WORD3;
3073                         break;
3074                 }
3075
3076                 if (!dc_wake_and_execute_gpint(adev->dm.dc->ctx, cmd, res, NULL, DM_DMUB_WAIT_TYPE_WAIT))
3077                         return -EIO;
3078
3079                 usleep_range(100, 1000);
3080
3081                 mask <<= 16;
3082                 shift += 16;
3083         }
3084
3085         return 0;
3086 }
3087
3088 static int dmub_trace_mask_show(void *data, u64 *val)
3089 {
3090         enum dmub_gpint_command cmd = DMUB_GPINT__GET_TRACE_BUFFER_MASK_WORD0;
3091         struct amdgpu_device *adev = data;
3092         struct dmub_srv *srv = adev->dm.dc->ctx->dmub_srv->dmub;
3093         u8 shift = 0;
3094         u64 raw = 0;
3095         u64 res = 0;
3096         int i = 0;
3097
3098         if (!srv->fw_version)
3099                 return -EINVAL;
3100
3101         while (i < 4) {
3102                 uint32_t response;
3103
3104                 if (!dc_wake_and_execute_gpint(adev->dm.dc->ctx, cmd, 0, &response, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY))
3105                         return -EIO;
3106
3107                 raw = response;
3108                 usleep_range(100, 1000);
3109
3110                 cmd++;
3111                 res |= (raw << shift);
3112                 shift += 16;
3113                 i++;
3114         }
3115
3116         *val = res;
3117
3118         return 0;
3119 }
3120
3121 DEFINE_DEBUGFS_ATTRIBUTE(dmub_trace_mask_fops, dmub_trace_mask_show,
3122                          dmub_trace_mask_set, "0x%llx\n");
3123
3124 /*
3125  * Set dmcub trace event IRQ enable or disable.
3126  * Usage to enable dmcub trace event IRQ: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3127  * Usage to disable dmcub trace event IRQ: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3128  */
3129 static int dmcub_trace_event_state_set(void *data, u64 val)
3130 {
3131         struct amdgpu_device *adev = data;
3132
3133         if (val == 1 || val == 0) {
3134                 dc_dmub_trace_event_control(adev->dm.dc, val);
3135                 adev->dm.dmcub_trace_event_en = (bool)val;
3136         } else
3137                 return 0;
3138
3139         return 0;
3140 }
3141
3142 /*
3143  * The interface doesn't need get function, so it will return the
3144  * value of zero
3145  * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
3146  */
3147 static int dmcub_trace_event_state_get(void *data, u64 *val)
3148 {
3149         struct amdgpu_device *adev = data;
3150
3151         *val = adev->dm.dmcub_trace_event_en;
3152         return 0;
3153 }
3154
3155 DEFINE_DEBUGFS_ATTRIBUTE(dmcub_trace_event_state_fops, dmcub_trace_event_state_get,
3156                          dmcub_trace_event_state_set, "%llu\n");
3157
3158 DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n");
3159 DEFINE_DEBUGFS_ATTRIBUTE(psr_residency_fops, psr_read_residency, NULL,
3160                          "%llu\n");
3161
3162 DEFINE_DEBUGFS_ATTRIBUTE(allow_edp_hotplug_detection_fops,
3163                         allow_edp_hotplug_detection_get,
3164                         allow_edp_hotplug_detection_set, "%llu\n");
3165
3166 DEFINE_DEBUGFS_ATTRIBUTE(disallow_edp_enter_psr_fops,
3167                         disallow_edp_enter_psr_get,
3168                         disallow_edp_enter_psr_set, "%llu\n");
3169
3170 DEFINE_SHOW_ATTRIBUTE(current_backlight);
3171 DEFINE_SHOW_ATTRIBUTE(target_backlight);
3172
3173 static const struct {
3174         char *name;
3175         const struct file_operations *fops;
3176 } connector_debugfs_entries[] = {
3177                 {"force_yuv420_output", &force_yuv420_output_fops},
3178                 {"trigger_hotplug", &trigger_hotplug_debugfs_fops},
3179                 {"internal_display", &internal_display_fops},
3180                 {"odm_combine_segments", &odm_combine_segments_fops}
3181 };
3182
3183 /*
3184  * Returns supported customized link rates by this eDP panel.
3185  * Example usage: cat /sys/kernel/debug/dri/0/eDP-x/ilr_setting
3186  */
3187 static int edp_ilr_show(struct seq_file *m, void *unused)
3188 {
3189         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private);
3190         struct dc_link *link = aconnector->dc_link;
3191         uint8_t supported_link_rates[16];
3192         uint32_t link_rate_in_khz;
3193         uint32_t entry = 0;
3194         uint8_t dpcd_rev;
3195
3196         memset(supported_link_rates, 0, sizeof(supported_link_rates));
3197         dm_helpers_dp_read_dpcd(link->ctx, link, DP_SUPPORTED_LINK_RATES,
3198                 supported_link_rates, sizeof(supported_link_rates));
3199
3200         dpcd_rev = link->dpcd_caps.dpcd_rev.raw;
3201
3202         if (dpcd_rev >= DP_DPCD_REV_13 &&
3203                 (supported_link_rates[entry+1] != 0 || supported_link_rates[entry] != 0)) {
3204
3205                 for (entry = 0; entry < 16; entry += 2) {
3206                         link_rate_in_khz = (supported_link_rates[entry+1] * 0x100 +
3207                                                                                 supported_link_rates[entry]) * 200;
3208                         seq_printf(m, "[%d] %d kHz\n", entry/2, link_rate_in_khz);
3209                 }
3210         } else {
3211                 seq_puts(m, "ILR is not supported by this eDP panel.\n");
3212         }
3213
3214         return 0;
3215 }
3216
3217 /*
3218  * Set supported customized link rate to eDP panel.
3219  *
3220  * echo <lane_count>  <link_rate option> > ilr_setting
3221  *
3222  * for example, supported ILR : [0] 1620000 kHz [1] 2160000 kHz [2] 2430000 kHz ...
3223  * echo 4 1 > /sys/kernel/debug/dri/0/eDP-x/ilr_setting
3224  * to set 4 lanes and 2.16 GHz
3225  */
3226 static ssize_t edp_ilr_write(struct file *f, const char __user *buf,
3227                                  size_t size, loff_t *pos)
3228 {
3229         struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
3230         struct dc_link *link = connector->dc_link;
3231         struct amdgpu_device *adev = drm_to_adev(connector->base.dev);
3232         struct dc *dc = (struct dc *)link->dc;
3233         struct dc_link_settings prefer_link_settings;
3234         char *wr_buf = NULL;
3235         const uint32_t wr_buf_size = 40;
3236         /* 0: lane_count; 1: link_rate */
3237         int max_param_num = 2;
3238         uint8_t param_nums = 0;
3239         long param[2];
3240         bool valid_input = true;
3241
3242         if (size == 0)
3243                 return -EINVAL;
3244
3245         wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL);
3246         if (!wr_buf)
3247                 return -ENOMEM;
3248
3249         if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
3250                                            (long *)param, buf,
3251                                            max_param_num,
3252                                            &param_nums)) {
3253                 kfree(wr_buf);
3254                 return -EINVAL;
3255         }
3256
3257         if (param_nums <= 0) {
3258                 kfree(wr_buf);
3259                 return -EINVAL;
3260         }
3261
3262         switch (param[0]) {
3263         case LANE_COUNT_ONE:
3264         case LANE_COUNT_TWO:
3265         case LANE_COUNT_FOUR:
3266                 break;
3267         default:
3268                 valid_input = false;
3269                 break;
3270         }
3271
3272         if (param[1] >= link->dpcd_caps.edp_supported_link_rates_count)
3273                 valid_input = false;
3274
3275         if (!valid_input) {
3276                 kfree(wr_buf);
3277                 DRM_DEBUG_DRIVER("Invalid Input value. No HW will be programmed\n");
3278                 prefer_link_settings.use_link_rate_set = false;
3279                 mutex_lock(&adev->dm.dc_lock);
3280                 dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false);
3281                 mutex_unlock(&adev->dm.dc_lock);
3282                 return size;
3283         }
3284
3285         /* save user force lane_count, link_rate to preferred settings
3286          * spread spectrum will not be changed
3287          */
3288         prefer_link_settings.link_spread = link->cur_link_settings.link_spread;
3289         prefer_link_settings.lane_count = param[0];
3290         prefer_link_settings.use_link_rate_set = true;
3291         prefer_link_settings.link_rate_set = param[1];
3292         prefer_link_settings.link_rate = link->dpcd_caps.edp_supported_link_rates[param[1]];
3293
3294         mutex_lock(&adev->dm.dc_lock);
3295         dc_link_set_preferred_training_settings(dc, &prefer_link_settings,
3296                                                 NULL, link, false);
3297         mutex_unlock(&adev->dm.dc_lock);
3298
3299         kfree(wr_buf);
3300         return size;
3301 }
3302
3303 static int edp_ilr_open(struct inode *inode, struct file *file)
3304 {
3305         return single_open(file, edp_ilr_show, inode->i_private);
3306 }
3307
3308 static const struct file_operations edp_ilr_debugfs_fops = {
3309         .owner = THIS_MODULE,
3310         .open = edp_ilr_open,
3311         .read = seq_read,
3312         .llseek = seq_lseek,
3313         .release = single_release,
3314         .write = edp_ilr_write
3315 };
3316
3317 void connector_debugfs_init(struct amdgpu_dm_connector *connector)
3318 {
3319         int i;
3320         struct dentry *dir = connector->base.debugfs_entry;
3321
3322         if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
3323             connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
3324                 for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
3325                         debugfs_create_file(dp_debugfs_entries[i].name,
3326                                             0644, dir, connector,
3327                                             dp_debugfs_entries[i].fops);
3328                 }
3329         }
3330         if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
3331                 debugfs_create_file_unsafe("psr_capability", 0444, dir, connector, &psr_capability_fops);
3332                 debugfs_create_file_unsafe("psr_state", 0444, dir, connector, &psr_fops);
3333                 debugfs_create_file_unsafe("psr_residency", 0444, dir,
3334                                            connector, &psr_residency_fops);
3335                 debugfs_create_file("amdgpu_current_backlight_pwm", 0444, dir, connector,
3336                                     &current_backlight_fops);
3337                 debugfs_create_file("amdgpu_target_backlight_pwm", 0444, dir, connector,
3338                                     &target_backlight_fops);
3339                 debugfs_create_file("ilr_setting", 0644, dir, connector,
3340                                         &edp_ilr_debugfs_fops);
3341                 debugfs_create_file("allow_edp_hotplug_detection", 0644, dir, connector,
3342                                         &allow_edp_hotplug_detection_fops);
3343                 debugfs_create_file("disallow_edp_enter_psr", 0644, dir, connector,
3344                                         &disallow_edp_enter_psr_fops);
3345         }
3346
3347         for (i = 0; i < ARRAY_SIZE(connector_debugfs_entries); i++) {
3348                 debugfs_create_file(connector_debugfs_entries[i].name,
3349                                     0644, dir, connector,
3350                                     connector_debugfs_entries[i].fops);
3351         }
3352
3353         if (connector->base.connector_type == DRM_MODE_CONNECTOR_HDMIA) {
3354                 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_entries); i++) {
3355                         debugfs_create_file(hdmi_debugfs_entries[i].name,
3356                                             0644, dir, connector,
3357                                             hdmi_debugfs_entries[i].fops);
3358                 }
3359         }
3360 }
3361
3362 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
3363 /*
3364  * Set crc window coordinate x start
3365  */
3366 static int crc_win_x_start_set(void *data, u64 val)
3367 {
3368         struct drm_crtc *crtc = data;
3369         struct drm_device *drm_dev = crtc->dev;
3370         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3371
3372         spin_lock_irq(&drm_dev->event_lock);
3373         acrtc->dm_irq_params.window_param.x_start = (uint16_t) val;
3374         acrtc->dm_irq_params.window_param.update_win = false;
3375         spin_unlock_irq(&drm_dev->event_lock);
3376
3377         return 0;
3378 }
3379
3380 /*
3381  * Get crc window coordinate x start
3382  */
3383 static int crc_win_x_start_get(void *data, u64 *val)
3384 {
3385         struct drm_crtc *crtc = data;
3386         struct drm_device *drm_dev = crtc->dev;
3387         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3388
3389         spin_lock_irq(&drm_dev->event_lock);
3390         *val = acrtc->dm_irq_params.window_param.x_start;
3391         spin_unlock_irq(&drm_dev->event_lock);
3392
3393         return 0;
3394 }
3395
3396 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_start_fops, crc_win_x_start_get,
3397                          crc_win_x_start_set, "%llu\n");
3398
3399
3400 /*
3401  * Set crc window coordinate y start
3402  */
3403 static int crc_win_y_start_set(void *data, u64 val)
3404 {
3405         struct drm_crtc *crtc = data;
3406         struct drm_device *drm_dev = crtc->dev;
3407         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3408
3409         spin_lock_irq(&drm_dev->event_lock);
3410         acrtc->dm_irq_params.window_param.y_start = (uint16_t) val;
3411         acrtc->dm_irq_params.window_param.update_win = false;
3412         spin_unlock_irq(&drm_dev->event_lock);
3413
3414         return 0;
3415 }
3416
3417 /*
3418  * Get crc window coordinate y start
3419  */
3420 static int crc_win_y_start_get(void *data, u64 *val)
3421 {
3422         struct drm_crtc *crtc = data;
3423         struct drm_device *drm_dev = crtc->dev;
3424         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3425
3426         spin_lock_irq(&drm_dev->event_lock);
3427         *val = acrtc->dm_irq_params.window_param.y_start;
3428         spin_unlock_irq(&drm_dev->event_lock);
3429
3430         return 0;
3431 }
3432
3433 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_start_fops, crc_win_y_start_get,
3434                          crc_win_y_start_set, "%llu\n");
3435
3436 /*
3437  * Set crc window coordinate x end
3438  */
3439 static int crc_win_x_end_set(void *data, u64 val)
3440 {
3441         struct drm_crtc *crtc = data;
3442         struct drm_device *drm_dev = crtc->dev;
3443         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3444
3445         spin_lock_irq(&drm_dev->event_lock);
3446         acrtc->dm_irq_params.window_param.x_end = (uint16_t) val;
3447         acrtc->dm_irq_params.window_param.update_win = false;
3448         spin_unlock_irq(&drm_dev->event_lock);
3449
3450         return 0;
3451 }
3452
3453 /*
3454  * Get crc window coordinate x end
3455  */
3456 static int crc_win_x_end_get(void *data, u64 *val)
3457 {
3458         struct drm_crtc *crtc = data;
3459         struct drm_device *drm_dev = crtc->dev;
3460         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3461
3462         spin_lock_irq(&drm_dev->event_lock);
3463         *val = acrtc->dm_irq_params.window_param.x_end;
3464         spin_unlock_irq(&drm_dev->event_lock);
3465
3466         return 0;
3467 }
3468
3469 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_end_fops, crc_win_x_end_get,
3470                          crc_win_x_end_set, "%llu\n");
3471
3472 /*
3473  * Set crc window coordinate y end
3474  */
3475 static int crc_win_y_end_set(void *data, u64 val)
3476 {
3477         struct drm_crtc *crtc = data;
3478         struct drm_device *drm_dev = crtc->dev;
3479         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3480
3481         spin_lock_irq(&drm_dev->event_lock);
3482         acrtc->dm_irq_params.window_param.y_end = (uint16_t) val;
3483         acrtc->dm_irq_params.window_param.update_win = false;
3484         spin_unlock_irq(&drm_dev->event_lock);
3485
3486         return 0;
3487 }
3488
3489 /*
3490  * Get crc window coordinate y end
3491  */
3492 static int crc_win_y_end_get(void *data, u64 *val)
3493 {
3494         struct drm_crtc *crtc = data;
3495         struct drm_device *drm_dev = crtc->dev;
3496         struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
3497
3498         spin_lock_irq(&drm_dev->event_lock);
3499         *val = acrtc->dm_irq_params.window_param.y_end;
3500         spin_unlock_irq(&drm_dev->event_lock);
3501
3502         return 0;
3503 }
3504
3505 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_end_fops, crc_win_y_end_get,
3506                          crc_win_y_end_set, "%llu\n");
3507 /*
3508  * Trigger to commit crc window
3509  */
3510 static int crc_win_update_set(void *data, u64 val)
3511 {
3512         struct drm_crtc *crtc = data;
3513         struct amdgpu_crtc *acrtc;
3514         struct amdgpu_device *adev = drm_to_adev(crtc->dev);
3515
3516         if (val) {
3517                 acrtc = to_amdgpu_crtc(crtc);
3518                 mutex_lock(&adev->dm.dc_lock);
3519                 /* PSR may write to OTG CRC window control register,
3520                  * so close it before starting secure_display.
3521                  */
3522                 amdgpu_dm_psr_disable(acrtc->dm_irq_params.stream);
3523
3524                 spin_lock_irq(&adev_to_drm(adev)->event_lock);
3525
3526                 acrtc->dm_irq_params.window_param.activated = true;
3527                 acrtc->dm_irq_params.window_param.update_win = true;
3528                 acrtc->dm_irq_params.window_param.skip_frame_cnt = 0;
3529
3530                 spin_unlock_irq(&adev_to_drm(adev)->event_lock);
3531                 mutex_unlock(&adev->dm.dc_lock);
3532         }
3533
3534         return 0;
3535 }
3536
3537 /*
3538  * Get crc window update flag
3539  */
3540 static int crc_win_update_get(void *data, u64 *val)
3541 {
3542         *val = 0;
3543         return 0;
3544 }
3545
3546 DEFINE_DEBUGFS_ATTRIBUTE(crc_win_update_fops, crc_win_update_get,
3547                          crc_win_update_set, "%llu\n");
3548 #endif
3549 void crtc_debugfs_init(struct drm_crtc *crtc)
3550 {
3551 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
3552         struct dentry *dir = debugfs_lookup("crc", crtc->debugfs_entry);
3553
3554         if (!dir)
3555                 return;
3556
3557         debugfs_create_file_unsafe("crc_win_x_start", 0644, dir, crtc,
3558                                    &crc_win_x_start_fops);
3559         debugfs_create_file_unsafe("crc_win_y_start", 0644, dir, crtc,
3560                                    &crc_win_y_start_fops);
3561         debugfs_create_file_unsafe("crc_win_x_end", 0644, dir, crtc,
3562                                    &crc_win_x_end_fops);
3563         debugfs_create_file_unsafe("crc_win_y_end", 0644, dir, crtc,
3564                                    &crc_win_y_end_fops);
3565         debugfs_create_file_unsafe("crc_win_update", 0644, dir, crtc,
3566                                    &crc_win_update_fops);
3567         dput(dir);
3568 #endif
3569         debugfs_create_file("amdgpu_current_bpc", 0644, crtc->debugfs_entry,
3570                             crtc, &amdgpu_current_bpc_fops);
3571         debugfs_create_file("amdgpu_current_colorspace", 0644, crtc->debugfs_entry,
3572                             crtc, &amdgpu_current_colorspace_fops);
3573 }
3574
3575 /*
3576  * Writes DTN log state to the user supplied buffer.
3577  * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log
3578  */
3579 static ssize_t dtn_log_read(
3580         struct file *f,
3581         char __user *buf,
3582         size_t size,
3583         loff_t *pos)
3584 {
3585         struct amdgpu_device *adev = file_inode(f)->i_private;
3586         struct dc *dc = adev->dm.dc;
3587         struct dc_log_buffer_ctx log_ctx = { 0 };
3588         ssize_t result = 0;
3589
3590         if (!buf || !size)
3591                 return -EINVAL;
3592
3593         if (!dc->hwss.log_hw_state)
3594                 return 0;
3595
3596         dc->hwss.log_hw_state(dc, &log_ctx);
3597
3598         if (*pos < log_ctx.pos) {
3599                 size_t to_copy = log_ctx.pos - *pos;
3600
3601                 to_copy = min(to_copy, size);
3602
3603                 if (!copy_to_user(buf, log_ctx.buf + *pos, to_copy)) {
3604                         *pos += to_copy;
3605                         result = to_copy;
3606                 }
3607         }
3608
3609         kfree(log_ctx.buf);
3610
3611         return result;
3612 }
3613
3614 /*
3615  * Writes DTN log state to dmesg when triggered via a write.
3616  * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log
3617  */
3618 static ssize_t dtn_log_write(
3619         struct file *f,
3620         const char __user *buf,
3621         size_t size,
3622         loff_t *pos)
3623 {
3624         struct amdgpu_device *adev = file_inode(f)->i_private;
3625         struct dc *dc = adev->dm.dc;
3626
3627         /* Write triggers log output via dmesg. */
3628         if (size == 0)
3629                 return 0;
3630
3631         if (dc->hwss.log_hw_state)
3632                 dc->hwss.log_hw_state(dc, NULL);
3633
3634         return size;
3635 }
3636
3637 static int mst_topo_show(struct seq_file *m, void *unused)
3638 {
3639         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
3640         struct drm_device *dev = adev_to_drm(adev);
3641         struct drm_connector *connector;
3642         struct drm_connector_list_iter conn_iter;
3643         struct amdgpu_dm_connector *aconnector;
3644
3645         drm_connector_list_iter_begin(dev, &conn_iter);
3646         drm_for_each_connector_iter(connector, &conn_iter) {
3647                 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
3648                         continue;
3649
3650                 aconnector = to_amdgpu_dm_connector(connector);
3651
3652                 /* Ensure we're only dumping the topology of a root mst node */
3653                 if (!aconnector->mst_mgr.mst_state)
3654                         continue;
3655
3656                 seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id);
3657                 drm_dp_mst_dump_topology(m, &aconnector->mst_mgr);
3658         }
3659         drm_connector_list_iter_end(&conn_iter);
3660
3661         return 0;
3662 }
3663
3664 /*
3665  * Sets trigger hpd for MST topologies.
3666  * All connected connectors will be rediscovered and re started as needed if val of 1 is sent.
3667  * All topologies will be disconnected if val of 0 is set .
3668  * Usage to enable topologies: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3669  * Usage to disable topologies: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3670  */
3671 static int trigger_hpd_mst_set(void *data, u64 val)
3672 {
3673         struct amdgpu_device *adev = data;
3674         struct drm_device *dev = adev_to_drm(adev);
3675         struct drm_connector_list_iter iter;
3676         struct amdgpu_dm_connector *aconnector;
3677         struct drm_connector *connector;
3678         struct dc_link *link = NULL;
3679
3680         if (val == 1) {
3681                 drm_connector_list_iter_begin(dev, &iter);
3682                 drm_for_each_connector_iter(connector, &iter) {
3683                         aconnector = to_amdgpu_dm_connector(connector);
3684                         if (aconnector->dc_link->type == dc_connection_mst_branch &&
3685                             aconnector->mst_mgr.aux) {
3686                                 mutex_lock(&adev->dm.dc_lock);
3687                                 dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
3688                                 mutex_unlock(&adev->dm.dc_lock);
3689
3690                                 drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
3691                         }
3692                 }
3693         } else if (val == 0) {
3694                 drm_connector_list_iter_begin(dev, &iter);
3695                 drm_for_each_connector_iter(connector, &iter) {
3696                         aconnector = to_amdgpu_dm_connector(connector);
3697                         if (!aconnector->dc_link)
3698                                 continue;
3699
3700                         if (!aconnector->mst_root)
3701                                 continue;
3702
3703                         link = aconnector->dc_link;
3704                         dc_link_dp_receiver_power_ctrl(link, false);
3705                         drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_root->mst_mgr, false);
3706                         link->mst_stream_alloc_table.stream_count = 0;
3707                         memset(link->mst_stream_alloc_table.stream_allocations, 0,
3708                                         sizeof(link->mst_stream_alloc_table.stream_allocations));
3709                 }
3710         } else {
3711                 return 0;
3712         }
3713         drm_kms_helper_hotplug_event(dev);
3714
3715         return 0;
3716 }
3717
3718 /*
3719  * The interface doesn't need get function, so it will return the
3720  * value of zero
3721  * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
3722  */
3723 static int trigger_hpd_mst_get(void *data, u64 *val)
3724 {
3725         *val = 0;
3726         return 0;
3727 }
3728
3729 DEFINE_DEBUGFS_ATTRIBUTE(trigger_hpd_mst_ops, trigger_hpd_mst_get,
3730                          trigger_hpd_mst_set, "%llu\n");
3731
3732
3733 /*
3734  * Sets the force_timing_sync debug option from the given string.
3735  * All connected displays will be force synchronized immediately.
3736  * Usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync
3737  */
3738 static int force_timing_sync_set(void *data, u64 val)
3739 {
3740         struct amdgpu_device *adev = data;
3741
3742         adev->dm.force_timing_sync = (bool)val;
3743
3744         amdgpu_dm_trigger_timing_sync(adev_to_drm(adev));
3745
3746         return 0;
3747 }
3748
3749 /*
3750  * Gets the force_timing_sync debug option value into the given buffer.
3751  * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync
3752  */
3753 static int force_timing_sync_get(void *data, u64 *val)
3754 {
3755         struct amdgpu_device *adev = data;
3756
3757         *val = adev->dm.force_timing_sync;
3758
3759         return 0;
3760 }
3761
3762 DEFINE_DEBUGFS_ATTRIBUTE(force_timing_sync_ops, force_timing_sync_get,
3763                          force_timing_sync_set, "%llu\n");
3764
3765
3766 /*
3767  * Disables all HPD and HPD RX interrupt handling in the
3768  * driver when set to 1. Default is 0.
3769  */
3770 static int disable_hpd_set(void *data, u64 val)
3771 {
3772         struct amdgpu_device *adev = data;
3773
3774         adev->dm.disable_hpd_irq = (bool)val;
3775
3776         return 0;
3777 }
3778
3779
3780 /*
3781  * Returns 1 if HPD and HPRX interrupt handling is disabled,
3782  * 0 otherwise.
3783  */
3784 static int disable_hpd_get(void *data, u64 *val)
3785 {
3786         struct amdgpu_device *adev = data;
3787
3788         *val = adev->dm.disable_hpd_irq;
3789
3790         return 0;
3791 }
3792
3793 DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get,
3794                          disable_hpd_set, "%llu\n");
3795
3796 /*
3797  * Prints hardware capabilities. These are used for IGT testing.
3798  */
3799 static int capabilities_show(struct seq_file *m, void *unused)
3800 {
3801         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
3802         struct dc *dc = adev->dm.dc;
3803         bool mall_supported = dc->caps.mall_size_total;
3804         bool subvp_supported = dc->caps.subvp_fw_processing_delay_us;
3805         unsigned int mall_in_use = false;
3806         unsigned int subvp_in_use = false;
3807
3808         struct hubbub *hubbub = dc->res_pool->hubbub;
3809
3810         if (hubbub->funcs->get_mall_en)
3811                 hubbub->funcs->get_mall_en(hubbub, &mall_in_use);
3812
3813         if (dc->cap_funcs.get_subvp_en)
3814                 subvp_in_use = dc->cap_funcs.get_subvp_en(dc, dc->current_state);
3815
3816         seq_printf(m, "mall supported: %s, enabled: %s\n",
3817                            mall_supported ? "yes" : "no", mall_in_use ? "yes" : "no");
3818         seq_printf(m, "sub-viewport supported: %s, enabled: %s\n",
3819                            subvp_supported ? "yes" : "no", subvp_in_use ? "yes" : "no");
3820
3821         return 0;
3822 }
3823
3824 DEFINE_SHOW_ATTRIBUTE(capabilities);
3825
3826 /*
3827  * Temporary w/a to force sst sequence in M42D DP2 mst receiver
3828  * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_set_mst_en_for_sst
3829  */
3830 static int dp_force_sst_set(void *data, u64 val)
3831 {
3832         struct amdgpu_device *adev = data;
3833
3834         adev->dm.dc->debug.set_mst_en_for_sst = val;
3835
3836         return 0;
3837 }
3838
3839 static int dp_force_sst_get(void *data, u64 *val)
3840 {
3841         struct amdgpu_device *adev = data;
3842
3843         *val = adev->dm.dc->debug.set_mst_en_for_sst;
3844
3845         return 0;
3846 }
3847 DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get,
3848                          dp_force_sst_set, "%llu\n");
3849
3850 /*
3851  * Force DP2 sequence without VESA certified cable.
3852  * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_ignore_cable_id
3853  */
3854 static int dp_ignore_cable_id_set(void *data, u64 val)
3855 {
3856         struct amdgpu_device *adev = data;
3857
3858         adev->dm.dc->debug.ignore_cable_id = val;
3859
3860         return 0;
3861 }
3862
3863 static int dp_ignore_cable_id_get(void *data, u64 *val)
3864 {
3865         struct amdgpu_device *adev = data;
3866
3867         *val = adev->dm.dc->debug.ignore_cable_id;
3868
3869         return 0;
3870 }
3871 DEFINE_DEBUGFS_ATTRIBUTE(dp_ignore_cable_id_ops, dp_ignore_cable_id_get,
3872                          dp_ignore_cable_id_set, "%llu\n");
3873
3874 /*
3875  * Sets the DC visual confirm debug option from the given string.
3876  * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm
3877  */
3878 static int visual_confirm_set(void *data, u64 val)
3879 {
3880         struct amdgpu_device *adev = data;
3881
3882         adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val;
3883
3884         return 0;
3885 }
3886
3887 /*
3888  * Reads the DC visual confirm debug option value into the given buffer.
3889  * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm
3890  */
3891 static int visual_confirm_get(void *data, u64 *val)
3892 {
3893         struct amdgpu_device *adev = data;
3894
3895         *val = adev->dm.dc->debug.visual_confirm;
3896
3897         return 0;
3898 }
3899
3900 DEFINE_SHOW_ATTRIBUTE(mst_topo);
3901 DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get,
3902                          visual_confirm_set, "%llu\n");
3903
3904
3905 /*
3906  * Sets the DC skip_detection_link_training debug option from the given string.
3907  * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_skip_detection_link_training
3908  */
3909 static int skip_detection_link_training_set(void *data, u64 val)
3910 {
3911         struct amdgpu_device *adev = data;
3912
3913         if (val == 0)
3914                 adev->dm.dc->debug.skip_detection_link_training = false;
3915         else
3916                 adev->dm.dc->debug.skip_detection_link_training = true;
3917
3918         return 0;
3919 }
3920
3921 /*
3922  * Reads the DC skip_detection_link_training debug option value into the given buffer.
3923  * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_skip_detection_link_training
3924  */
3925 static int skip_detection_link_training_get(void *data, u64 *val)
3926 {
3927         struct amdgpu_device *adev = data;
3928
3929         *val = adev->dm.dc->debug.skip_detection_link_training;
3930
3931         return 0;
3932 }
3933
3934 DEFINE_DEBUGFS_ATTRIBUTE(skip_detection_link_training_fops,
3935                          skip_detection_link_training_get,
3936                          skip_detection_link_training_set, "%llu\n");
3937
3938 /*
3939  * Dumps the DCC_EN bit for each pipe.
3940  * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dcc_en
3941  */
3942 static ssize_t dcc_en_bits_read(
3943         struct file *f,
3944         char __user *buf,
3945         size_t size,
3946         loff_t *pos)
3947 {
3948         struct amdgpu_device *adev = file_inode(f)->i_private;
3949         struct dc *dc = adev->dm.dc;
3950         char *rd_buf = NULL;
3951         const uint32_t rd_buf_size = 32;
3952         uint32_t result = 0;
3953         int offset = 0;
3954         int num_pipes = dc->res_pool->pipe_count;
3955         int *dcc_en_bits;
3956         int i, r;
3957
3958         dcc_en_bits = kcalloc(num_pipes, sizeof(int), GFP_KERNEL);
3959         if (!dcc_en_bits)
3960                 return -ENOMEM;
3961
3962         if (!dc->hwss.get_dcc_en_bits) {
3963                 kfree(dcc_en_bits);
3964                 return 0;
3965         }
3966
3967         dc->hwss.get_dcc_en_bits(dc, dcc_en_bits);
3968
3969         rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
3970         if (!rd_buf) {
3971                 kfree(dcc_en_bits);
3972                 return -ENOMEM;
3973         }
3974
3975         for (i = 0; i < num_pipes; i++)
3976                 offset += snprintf(rd_buf + offset, rd_buf_size - offset,
3977                                    "%d  ", dcc_en_bits[i]);
3978         rd_buf[strlen(rd_buf)] = '\n';
3979
3980         kfree(dcc_en_bits);
3981
3982         while (size) {
3983                 if (*pos >= rd_buf_size)
3984                         break;
3985                 r = put_user(*(rd_buf + result), buf);
3986                 if (r) {
3987                         kfree(rd_buf);
3988                         return r; /* r = -EFAULT */
3989                 }
3990                 buf += 1;
3991                 size -= 1;
3992                 *pos += 1;
3993                 result += 1;
3994         }
3995
3996         kfree(rd_buf);
3997         return result;
3998 }
3999
4000 void dtn_debugfs_init(struct amdgpu_device *adev)
4001 {
4002         static const struct file_operations dtn_log_fops = {
4003                 .owner = THIS_MODULE,
4004                 .read = dtn_log_read,
4005                 .write = dtn_log_write,
4006                 .llseek = default_llseek
4007         };
4008         static const struct file_operations dcc_en_bits_fops = {
4009                 .owner = THIS_MODULE,
4010                 .read = dcc_en_bits_read,
4011                 .llseek = default_llseek
4012         };
4013
4014         struct drm_minor *minor = adev_to_drm(adev)->primary;
4015         struct dentry *root = minor->debugfs_root;
4016
4017         debugfs_create_file("amdgpu_mst_topology", 0444, root,
4018                             adev, &mst_topo_fops);
4019         debugfs_create_file("amdgpu_dm_capabilities", 0444, root,
4020                             adev, &capabilities_fops);
4021         debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev,
4022                             &dtn_log_fops);
4023         debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev,
4024                                 &dp_set_mst_en_for_sst_ops);
4025         debugfs_create_file("amdgpu_dm_dp_ignore_cable_id", 0644, root, adev,
4026                                 &dp_ignore_cable_id_ops);
4027
4028         debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
4029                                    &visual_confirm_fops);
4030
4031         debugfs_create_file_unsafe("amdgpu_dm_skip_detection_link_training", 0644, root, adev,
4032                                    &skip_detection_link_training_fops);
4033
4034         debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root,
4035                                    adev, &dmub_tracebuffer_fops);
4036
4037         debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root,
4038                                    adev, &dmub_fw_state_fops);
4039
4040         debugfs_create_file_unsafe("amdgpu_dm_force_timing_sync", 0644, root,
4041                                    adev, &force_timing_sync_ops);
4042
4043         debugfs_create_file_unsafe("amdgpu_dm_dmub_trace_mask", 0644, root,
4044                                    adev, &dmub_trace_mask_fops);
4045
4046         debugfs_create_file_unsafe("amdgpu_dm_dmcub_trace_event_en", 0644, root,
4047                                    adev, &dmcub_trace_event_state_fops);
4048
4049         debugfs_create_file_unsafe("amdgpu_dm_trigger_hpd_mst", 0644, root,
4050                                    adev, &trigger_hpd_mst_ops);
4051
4052         debugfs_create_file_unsafe("amdgpu_dm_dcc_en", 0644, root, adev,
4053                                    &dcc_en_bits_fops);
4054
4055         debugfs_create_file_unsafe("amdgpu_dm_disable_hpd", 0644, root, adev,
4056                                    &disable_hpd_ops);
4057
4058 }