drivers/gpu/drm/amd/display/modules/freesync/freesync.c

   1 /*
   2  * Copyright 2016 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/slab.h>
  27
  28 #include "dm_services.h"
  29 #include "dc.h"
  30 #include "mod_freesync.h"
  31 #include "core_types.h"
  32
  33 #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS  32
  34
  35 #define MIN_REFRESH_RANGE 10
  36 /* Refresh rate ramp at a fixed rate of 65 Hz/second */
  37 #define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65)
  38 /* Number of elements in the render times cache array */
  39 #define RENDER_TIMES_MAX_COUNT 10
  40 /* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */
  41 #define BTR_MAX_MARGIN 2500
  42 /* Threshold to change BTR multiplier (to avoid frequent changes) */
  43 #define BTR_DRIFT_MARGIN 2000
  44 /* Threshold to exit fixed refresh rate */
  45 #define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 1
  46 /* Number of consecutive frames to check before entering/exiting fixed refresh */
  47 #define FIXED_REFRESH_ENTER_FRAME_COUNT 5
  48 #define FIXED_REFRESH_EXIT_FRAME_COUNT 10
  49
  50 struct core_freesync {
  51         struct mod_freesync public;
  52         struct dc *dc;
  53 };
  54
  55 #define MOD_FREESYNC_TO_CORE(mod_freesync)\
  56                 container_of(mod_freesync, struct core_freesync, public)
  57
  58 struct mod_freesync *mod_freesync_create(struct dc *dc)
  59 {
  60         struct core_freesync *core_freesync =
  61                         kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
  62
  63         if (core_freesync == NULL)
  64                 goto fail_alloc_context;
  65
  66         if (dc == NULL)
  67                 goto fail_construct;
  68
  69         core_freesync->dc = dc;
  70         return &core_freesync->public;
  71
  72 fail_construct:
  73         kfree(core_freesync);
  74
  75 fail_alloc_context:
  76         return NULL;
  77 }
  78
  79 void mod_freesync_destroy(struct mod_freesync *mod_freesync)
  80 {
  81         struct core_freesync *core_freesync = NULL;
  82         if (mod_freesync == NULL)
  83                 return;
  84         core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
  85         kfree(core_freesync);
  86 }
  87
  88 #if 0 /* Unused currently */
  89 static unsigned int calc_refresh_in_uhz_from_duration(
  90                 unsigned int duration_in_ns)
  91 {
  92         unsigned int refresh_in_uhz =
  93                         ((unsigned int)(div64_u64((1000000000ULL * 1000000),
  94                                         duration_in_ns)));
  95         return refresh_in_uhz;
  96 }
  97 #endif
  98
  99 static unsigned int calc_duration_in_us_from_refresh_in_uhz(
 100                 unsigned int refresh_in_uhz)
 101 {
 102         unsigned int duration_in_us =
 103                         ((unsigned int)(div64_u64((1000000000ULL * 1000),
 104                                         refresh_in_uhz)));
 105         return duration_in_us;
 106 }
 107
 108 static unsigned int calc_duration_in_us_from_v_total(
 109                 const struct dc_stream_state *stream,
 110                 const struct mod_vrr_params *in_vrr,
 111                 unsigned int v_total)
 112 {
 113         unsigned int duration_in_us =
 114                         (unsigned int)(div64_u64(((unsigned long long)(v_total)
 115                                 * 10000) * stream->timing.h_total,
 116                                         stream->timing.pix_clk_100hz));
 117
 118         return duration_in_us;
 119 }
 120
 121 static unsigned int calc_v_total_from_refresh(
 122                 const struct dc_stream_state *stream,
 123                 unsigned int refresh_in_uhz)
 124 {
 125         unsigned int v_total;
 126         unsigned int frame_duration_in_ns;
 127
 128         frame_duration_in_ns =
 129                         ((unsigned int)(div64_u64((1000000000ULL * 1000000),
 130                                         refresh_in_uhz)));
 131
 132         v_total = div64_u64(div64_u64(((unsigned long long)(
 133                         frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)),
 134                         stream->timing.h_total), 1000000);
 135
 136         /* v_total cannot be less than nominal */
 137         if (v_total < stream->timing.v_total) {
 138                 ASSERT(v_total < stream->timing.v_total);
 139                 v_total = stream->timing.v_total;
 140         }
 141
 142         return v_total;
 143 }
 144
 145 static unsigned int calc_v_total_from_duration(
 146                 const struct dc_stream_state *stream,
 147                 const struct mod_vrr_params *vrr,
 148                 unsigned int duration_in_us)
 149 {
 150         unsigned int v_total = 0;
 151
 152         if (duration_in_us < vrr->min_duration_in_us)
 153                 duration_in_us = vrr->min_duration_in_us;
 154
 155         if (duration_in_us > vrr->max_duration_in_us)
 156                 duration_in_us = vrr->max_duration_in_us;
 157
 158         v_total = div64_u64(div64_u64(((unsigned long long)(
 159                                 duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
 160                                 stream->timing.h_total), 1000);
 161
 162         /* v_total cannot be less than nominal */
 163         if (v_total < stream->timing.v_total) {
 164                 ASSERT(v_total < stream->timing.v_total);
 165                 v_total = stream->timing.v_total;
 166         }
 167
 168         return v_total;
 169 }
 170
 171 static void update_v_total_for_static_ramp(
 172                 struct core_freesync *core_freesync,
 173                 const struct dc_stream_state *stream,
 174                 struct mod_vrr_params *in_out_vrr)
 175 {
 176         unsigned int v_total = 0;
 177         unsigned int current_duration_in_us =
 178                         calc_duration_in_us_from_v_total(
 179                                 stream, in_out_vrr,
 180                                 in_out_vrr->adjust.v_total_max);
 181         unsigned int target_duration_in_us =
 182                         calc_duration_in_us_from_refresh_in_uhz(
 183                                 in_out_vrr->fixed.target_refresh_in_uhz);
 184         bool ramp_direction_is_up = (current_duration_in_us >
 185                                 target_duration_in_us) ? true : false;
 186
 187         /* Calculate ratio between new and current frame duration with 3 digit */
 188         unsigned int frame_duration_ratio = div64_u64(1000000,
 189                 (1000 +  div64_u64(((unsigned long long)(
 190                 STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) *
 191                 current_duration_in_us),
 192                 1000000)));
 193
 194         /* Calculate delta between new and current frame duration in us */
 195         unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
 196                 current_duration_in_us) *
 197                 (1000 - frame_duration_ratio)), 1000);
 198
 199         /* Adjust frame duration delta based on ratio between current and
 200          * standard frame duration (frame duration at 60 Hz refresh rate).
 201          */
 202         unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)(
 203                 frame_duration_delta) * current_duration_in_us), 16666);
 204
 205         /* Going to a higher refresh rate (lower frame duration) */
 206         if (ramp_direction_is_up) {
 207                 /* Reduce frame duration */
 208                 current_duration_in_us -= ramp_rate_interpolated;
 209
 210                 /* Adjust for frame duration below min */
 211                 if (current_duration_in_us <= target_duration_in_us) {
 212                         in_out_vrr->fixed.ramping_active = false;
 213                         in_out_vrr->fixed.ramping_done = true;
 214                         current_duration_in_us =
 215                                 calc_duration_in_us_from_refresh_in_uhz(
 216                                 in_out_vrr->fixed.target_refresh_in_uhz);
 217                 }
 218         /* Going to a lower refresh rate (larger frame duration) */
 219         } else {
 220                 /* Increase frame duration */
 221                 current_duration_in_us += ramp_rate_interpolated;
 222
 223                 /* Adjust for frame duration above max */
 224                 if (current_duration_in_us >= target_duration_in_us) {
 225                         in_out_vrr->fixed.ramping_active = false;
 226                         in_out_vrr->fixed.ramping_done = true;
 227                         current_duration_in_us =
 228                                 calc_duration_in_us_from_refresh_in_uhz(
 229                                 in_out_vrr->fixed.target_refresh_in_uhz);
 230                 }
 231         }
 232
 233         v_total = div64_u64(div64_u64(((unsigned long long)(
 234                         current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
 235                                 stream->timing.h_total), 1000);
 236
 237         /* v_total cannot be less than nominal */
 238         if (v_total < stream->timing.v_total)
 239                 v_total = stream->timing.v_total;
 240
 241         in_out_vrr->adjust.v_total_min = v_total;
 242         in_out_vrr->adjust.v_total_max = v_total;
 243 }
 244
 245 static void apply_below_the_range(struct core_freesync *core_freesync,
 246                 const struct dc_stream_state *stream,
 247                 unsigned int last_render_time_in_us,
 248                 struct mod_vrr_params *in_out_vrr)
 249 {
 250         unsigned int inserted_frame_duration_in_us = 0;
 251         unsigned int mid_point_frames_ceil = 0;
 252         unsigned int mid_point_frames_floor = 0;
 253         unsigned int frame_time_in_us = 0;
 254         unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF;
 255         unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF;
 256         unsigned int frames_to_insert = 0;
 257         unsigned int delta_from_mid_point_delta_in_us;
 258         unsigned int max_render_time_in_us =
 259                         in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us;
 260
 261         /* Program BTR */
 262         if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) {
 263                 /* Exit Below the Range */
 264                 if (in_out_vrr->btr.btr_active) {
 265                         in_out_vrr->btr.frame_counter = 0;
 266                         in_out_vrr->btr.btr_active = false;
 267                 }
 268         } else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) {
 269                 /* Enter Below the Range */
 270                 if (!in_out_vrr->btr.btr_active) {
 271                         in_out_vrr->btr.btr_active = true;
 272                 }
 273         }
 274
 275         /* BTR set to "not active" so disengage */
 276         if (!in_out_vrr->btr.btr_active) {
 277                 in_out_vrr->btr.inserted_duration_in_us = 0;
 278                 in_out_vrr->btr.frames_to_insert = 0;
 279                 in_out_vrr->btr.frame_counter = 0;
 280
 281                 /* Restore FreeSync */
 282                 in_out_vrr->adjust.v_total_min =
 283                         calc_v_total_from_refresh(stream,
 284                                 in_out_vrr->max_refresh_in_uhz);
 285                 in_out_vrr->adjust.v_total_max =
 286                         calc_v_total_from_refresh(stream,
 287                                 in_out_vrr->min_refresh_in_uhz);
 288         /* BTR set to "active" so engage */
 289         } else {
 290
 291                 /* Calculate number of midPoint frames that could fit within
 292                  * the render time interval - take ceil of this value
 293                  */
 294                 mid_point_frames_ceil = (last_render_time_in_us +
 295                                 in_out_vrr->btr.mid_point_in_us - 1) /
 296                                         in_out_vrr->btr.mid_point_in_us;
 297
 298                 if (mid_point_frames_ceil > 0) {
 299                         frame_time_in_us = last_render_time_in_us /
 300                                 mid_point_frames_ceil;
 301                         delta_from_mid_point_in_us_1 =
 302                                 (in_out_vrr->btr.mid_point_in_us >
 303                                 frame_time_in_us) ?
 304                                 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
 305                                 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
 306                 }
 307
 308                 /* Calculate number of midPoint frames that could fit within
 309                  * the render time interval - take floor of this value
 310                  */
 311                 mid_point_frames_floor = last_render_time_in_us /
 312                                 in_out_vrr->btr.mid_point_in_us;
 313
 314                 if (mid_point_frames_floor > 0) {
 315
 316                         frame_time_in_us = last_render_time_in_us /
 317                                 mid_point_frames_floor;
 318                         delta_from_mid_point_in_us_2 =
 319                                 (in_out_vrr->btr.mid_point_in_us >
 320                                 frame_time_in_us) ?
 321                                 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
 322                                 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
 323                 }
 324
 325                 /* Choose number of frames to insert based on how close it
 326                  * can get to the mid point of the variable range.
 327                  *  - Delta for CEIL: delta_from_mid_point_in_us_1
 328                  *  - Delta for FLOOR: delta_from_mid_point_in_us_2
 329                  */
 330                 if ((last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) {
 331                         /* Check for out of range.
 332                          * If using CEIL produces a value that is out of range,
 333                          * then we are forced to use FLOOR.
 334                          */
 335                         frames_to_insert = mid_point_frames_floor;
 336                 } else if (mid_point_frames_floor < 2) {
 337                         /* Check if FLOOR would result in non-LFC. In this case
 338                          * choose to use CEIL
 339                          */
 340                         frames_to_insert = mid_point_frames_ceil;
 341                 } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
 342                         /* If choosing CEIL results in a frame duration that is
 343                          * closer to the mid point of the range.
 344                          * Choose CEIL
 345                          */
 346                         frames_to_insert = mid_point_frames_ceil;
 347                 } else {
 348                         /* If choosing FLOOR results in a frame duration that is
 349                          * closer to the mid point of the range.
 350                          * Choose FLOOR
 351                          */
 352                         frames_to_insert = mid_point_frames_floor;
 353                 }
 354
 355                 /* Prefer current frame multiplier when BTR is enabled unless it drifts
 356                  * too far from the midpoint
 357                  */
 358                 if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
 359                         delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 -
 360                                         delta_from_mid_point_in_us_1;
 361                 } else {
 362                         delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
 363                                         delta_from_mid_point_in_us_2;
 364                 }
 365                 if (in_out_vrr->btr.frames_to_insert != 0 &&
 366                                 delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) {
 367                         if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) <
 368                                         max_render_time_in_us) &&
 369                                 ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) >
 370                                         in_out_vrr->min_duration_in_us))
 371                                 frames_to_insert = in_out_vrr->btr.frames_to_insert;
 372                 }
 373
 374                 /* Either we've calculated the number of frames to insert,
 375                  * or we need to insert min duration frames
 376                  */
 377                 if (last_render_time_in_us / frames_to_insert <
 378                                 in_out_vrr->min_duration_in_us){
 379                         frames_to_insert -= (frames_to_insert > 1) ?
 380                                         1 : 0;
 381                 }
 382
 383                 if (frames_to_insert > 0)
 384                         inserted_frame_duration_in_us = last_render_time_in_us /
 385                                                         frames_to_insert;
 386
 387                 if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us)
 388                         inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us;
 389
 390                 /* Cache the calculated variables */
 391                 in_out_vrr->btr.inserted_duration_in_us =
 392                         inserted_frame_duration_in_us;
 393                 in_out_vrr->btr.frames_to_insert = frames_to_insert;
 394                 in_out_vrr->btr.frame_counter = frames_to_insert;
 395         }
 396 }
 397
 398 static void apply_fixed_refresh(struct core_freesync *core_freesync,
 399                 const struct dc_stream_state *stream,
 400                 unsigned int last_render_time_in_us,
 401                 struct mod_vrr_params *in_out_vrr)
 402 {
 403         bool update = false;
 404         unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
 405
 406         /* Compute the exit refresh rate and exit frame duration */
 407         unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us)
 408                         + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ));
 409         unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz;
 410
 411         if (last_render_time_in_us < exit_frame_duration_in_us) {
 412                 /* Exit Fixed Refresh mode */
 413                 if (in_out_vrr->fixed.fixed_active) {
 414                         in_out_vrr->fixed.frame_counter++;
 415
 416                         if (in_out_vrr->fixed.frame_counter >
 417                                         FIXED_REFRESH_EXIT_FRAME_COUNT) {
 418                                 in_out_vrr->fixed.frame_counter = 0;
 419                                 in_out_vrr->fixed.fixed_active = false;
 420                                 in_out_vrr->fixed.target_refresh_in_uhz = 0;
 421                                 update = true;
 422                         }
 423                 } else
 424                         in_out_vrr->fixed.frame_counter = 0;
 425         } else if (last_render_time_in_us > max_render_time_in_us) {
 426                 /* Enter Fixed Refresh mode */
 427                 if (!in_out_vrr->fixed.fixed_active) {
 428                         in_out_vrr->fixed.frame_counter++;
 429
 430                         if (in_out_vrr->fixed.frame_counter >
 431                                         FIXED_REFRESH_ENTER_FRAME_COUNT) {
 432                                 in_out_vrr->fixed.frame_counter = 0;
 433                                 in_out_vrr->fixed.fixed_active = true;
 434                                 in_out_vrr->fixed.target_refresh_in_uhz =
 435                                                 in_out_vrr->max_refresh_in_uhz;
 436                                 update = true;
 437                         }
 438                 } else
 439                         in_out_vrr->fixed.frame_counter = 0;
 440         }
 441
 442         if (update) {
 443                 if (in_out_vrr->fixed.fixed_active) {
 444                         in_out_vrr->adjust.v_total_min =
 445                                 calc_v_total_from_refresh(
 446                                 stream, in_out_vrr->max_refresh_in_uhz);
 447                         in_out_vrr->adjust.v_total_max =
 448                                         in_out_vrr->adjust.v_total_min;
 449                 } else {
 450                         in_out_vrr->adjust.v_total_min =
 451                                 calc_v_total_from_refresh(stream,
 452                                         in_out_vrr->max_refresh_in_uhz);
 453                         in_out_vrr->adjust.v_total_max =
 454                                 calc_v_total_from_refresh(stream,
 455                                         in_out_vrr->min_refresh_in_uhz);
 456                 }
 457         }
 458 }
 459
 460 static bool vrr_settings_require_update(struct core_freesync *core_freesync,
 461                 struct mod_freesync_config *in_config,
 462                 unsigned int min_refresh_in_uhz,
 463                 unsigned int max_refresh_in_uhz,
 464                 struct mod_vrr_params *in_vrr)
 465 {
 466         if (in_vrr->state != in_config->state) {
 467                 return true;
 468         } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED &&
 469                         in_vrr->fixed.target_refresh_in_uhz !=
 470                                         in_config->fixed_refresh_in_uhz) {
 471                 return true;
 472         } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) {
 473                 return true;
 474         } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) {
 475                 return true;
 476         }
 477
 478         return false;
 479 }
 480
 481 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
 482                 const struct dc_stream_state *stream,
 483                 unsigned int *vmin,
 484                 unsigned int *vmax)
 485 {
 486         *vmin = stream->adjust.v_total_min;
 487         *vmax = stream->adjust.v_total_max;
 488
 489         return true;
 490 }
 491
 492 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
 493                 struct dc_stream_state *stream,
 494                 unsigned int *nom_v_pos,
 495                 unsigned int *v_pos)
 496 {
 497         struct core_freesync *core_freesync = NULL;
 498         struct crtc_position position;
 499
 500         if (mod_freesync == NULL)
 501                 return false;
 502
 503         core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
 504
 505         if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1,
 506                                         &position.vertical_count,
 507                                         &position.nominal_vcount)) {
 508
 509                 *nom_v_pos = position.nominal_vcount;
 510                 *v_pos = position.vertical_count;
 511
 512                 return true;
 513         }
 514
 515         return false;
 516 }
 517
 518 static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr,
 519                 struct dc_info_packet *infopacket)
 520 {
 521         /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
 522         infopacket->sb[1] = 0x1A;
 523
 524         /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
 525         infopacket->sb[2] = 0x00;
 526
 527         /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
 528         infopacket->sb[3] = 0x00;
 529
 530         /* PB4 = Reserved */
 531
 532         /* PB5 = Reserved */
 533
 534         /* PB6 = [Bits 7:3 = Reserved] */
 535
 536         /* PB6 = [Bit 0 = FreeSync Supported] */
 537         if (vrr->state != VRR_STATE_UNSUPPORTED)
 538                 infopacket->sb[6] |= 0x01;
 539
 540         /* PB6 = [Bit 1 = FreeSync Enabled] */
 541         if (vrr->state != VRR_STATE_DISABLED &&
 542                         vrr->state != VRR_STATE_UNSUPPORTED)
 543                 infopacket->sb[6] |= 0x02;
 544
 545         /* PB6 = [Bit 2 = FreeSync Active] */
 546         if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
 547                         vrr->state == VRR_STATE_ACTIVE_FIXED)
 548                 infopacket->sb[6] |= 0x04;
 549
 550         // For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range
 551         /* PB7 = FreeSync Minimum refresh rate (Hz) */
 552         if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
 553                         vrr->state == VRR_STATE_ACTIVE_FIXED) {
 554                 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000);
 555         } else {
 556                 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
 557         }
 558
 559         /* PB8 = FreeSync Maximum refresh rate (Hz)
 560          * Note: We should never go above the field rate of the mode timing set.
 561          */
 562         infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
 563
 564         /* FreeSync HDR */
 565         infopacket->sb[9] = 0;
 566         infopacket->sb[10] = 0;
 567 }
 568
 569 static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr,
 570                 struct dc_info_packet *infopacket)
 571 {
 572         /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
 573         infopacket->sb[1] = 0x1A;
 574
 575         /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
 576         infopacket->sb[2] = 0x00;
 577
 578         /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
 579         infopacket->sb[3] = 0x00;
 580
 581         /* PB4 = Reserved */
 582
 583         /* PB5 = Reserved */
 584
 585         /* PB6 = [Bits 7:3 = Reserved] */
 586
 587         /* PB6 = [Bit 0 = FreeSync Supported] */
 588         if (vrr->state != VRR_STATE_UNSUPPORTED)
 589                 infopacket->sb[6] |= 0x01;
 590
 591         /* PB6 = [Bit 1 = FreeSync Enabled] */
 592         if (vrr->state != VRR_STATE_DISABLED &&
 593                         vrr->state != VRR_STATE_UNSUPPORTED)
 594                 infopacket->sb[6] |= 0x02;
 595
 596         /* PB6 = [Bit 2 = FreeSync Active] */
 597         if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
 598                         vrr->state == VRR_STATE_ACTIVE_FIXED)
 599                 infopacket->sb[6] |= 0x04;
 600
 601         if (vrr->state == VRR_STATE_ACTIVE_FIXED) {
 602                 /* PB7 = FreeSync Minimum refresh rate (Hz) */
 603                 infopacket->sb[7] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000);
 604                 /* PB8 = FreeSync Maximum refresh rate (Hz) */
 605                 infopacket->sb[8] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000);
 606         } else if (vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
 607                 /* PB7 = FreeSync Minimum refresh rate (Hz) */
 608                 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000);
 609                 /* PB8 = FreeSync Maximum refresh rate (Hz) */
 610                 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
 611         } else {
 612                 // Non-fs case, program nominal range
 613                 /* PB7 = FreeSync Minimum refresh rate (Hz) */
 614                 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
 615                 /* PB8 = FreeSync Maximum refresh rate (Hz) */
 616                 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
 617         }
 618
 619         //FreeSync HDR
 620         infopacket->sb[9] = 0;
 621         infopacket->sb[10] = 0;
 622 }
 623
 624 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
 625                 struct dc_info_packet *infopacket)
 626 {
 627         if (app_tf != TRANSFER_FUNC_UNKNOWN) {
 628                 infopacket->valid = true;
 629
 630                 infopacket->sb[6] |= 0x08;  // PB6 = [Bit 3 = Native Color Active]
 631
 632                 if (app_tf == TRANSFER_FUNC_GAMMA_22) {
 633                         infopacket->sb[9] |= 0x04;  // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
 634                 }
 635         }
 636 }
 637
 638 static void build_vrr_infopacket_header_v1(enum signal_type signal,
 639                 struct dc_info_packet *infopacket,
 640                 unsigned int *payload_size)
 641 {
 642         if (dc_is_hdmi_signal(signal)) {
 643
 644                 /* HEADER */
 645
 646                 /* HB0  = Packet Type = 0x83 (Source Product
 647                  *        Descriptor InfoFrame)
 648                  */
 649                 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
 650
 651                 /* HB1  = Version = 0x01 */
 652                 infopacket->hb1 = 0x01;
 653
 654                 /* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
 655                 infopacket->hb2 = 0x08;
 656
 657                 *payload_size = 0x08;
 658
 659         } else if (dc_is_dp_signal(signal)) {
 660
 661                 /* HEADER */
 662
 663                 /* HB0  = Secondary-data Packet ID = 0 - Only non-zero
 664                  *        when used to associate audio related info packets
 665                  */
 666                 infopacket->hb0 = 0x00;
 667
 668                 /* HB1  = Packet Type = 0x83 (Source Product
 669                  *        Descriptor InfoFrame)
 670                  */
 671                 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
 672
 673                 /* HB2  = [Bits 7:0 = Least significant eight bits -
 674                  *        For INFOFRAME, the value must be 1Bh]
 675                  */
 676                 infopacket->hb2 = 0x1B;
 677
 678                 /* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1]
 679                  *        [Bits 1:0 = Most significant two bits = 0x00]
 680                  */
 681                 infopacket->hb3 = 0x04;
 682
 683                 *payload_size = 0x1B;
 684         }
 685 }
 686
 687 static void build_vrr_infopacket_header_v2(enum signal_type signal,
 688                 struct dc_info_packet *infopacket,
 689                 unsigned int *payload_size)
 690 {
 691         if (dc_is_hdmi_signal(signal)) {
 692
 693                 /* HEADER */
 694
 695                 /* HB0  = Packet Type = 0x83 (Source Product
 696                  *        Descriptor InfoFrame)
 697                  */
 698                 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
 699
 700                 /* HB1  = Version = 0x02 */
 701                 infopacket->hb1 = 0x02;
 702
 703                 /* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
 704                 infopacket->hb2 = 0x09;
 705
 706                 *payload_size = 0x0A;
 707
 708         } else if (dc_is_dp_signal(signal)) {
 709
 710                 /* HEADER */
 711
 712                 /* HB0  = Secondary-data Packet ID = 0 - Only non-zero
 713                  *        when used to associate audio related info packets
 714                  */
 715                 infopacket->hb0 = 0x00;
 716
 717                 /* HB1  = Packet Type = 0x83 (Source Product
 718                  *        Descriptor InfoFrame)
 719                  */
 720                 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
 721
 722                 /* HB2  = [Bits 7:0 = Least significant eight bits -
 723                  *        For INFOFRAME, the value must be 1Bh]
 724                  */
 725                 infopacket->hb2 = 0x1B;
 726
 727                 /* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
 728                  *        [Bits 1:0 = Most significant two bits = 0x00]
 729                  */
 730                 infopacket->hb3 = 0x08;
 731
 732                 *payload_size = 0x1B;
 733         }
 734 }
 735
 736 static void build_vrr_infopacket_checksum(unsigned int *payload_size,
 737                 struct dc_info_packet *infopacket)
 738 {
 739         /* Calculate checksum */
 740         unsigned int idx = 0;
 741         unsigned char checksum = 0;
 742
 743         checksum += infopacket->hb0;
 744         checksum += infopacket->hb1;
 745         checksum += infopacket->hb2;
 746         checksum += infopacket->hb3;
 747
 748         for (idx = 1; idx <= *payload_size; idx++)
 749                 checksum += infopacket->sb[idx];
 750
 751         /* PB0 = Checksum (one byte complement) */
 752         infopacket->sb[0] = (unsigned char)(0x100 - checksum);
 753
 754         infopacket->valid = true;
 755 }
 756
 757 static void build_vrr_infopacket_v1(enum signal_type signal,
 758                 const struct mod_vrr_params *vrr,
 759                 struct dc_info_packet *infopacket)
 760 {
 761         /* SPD info packet for FreeSync */
 762         unsigned int payload_size = 0;
 763
 764         build_vrr_infopacket_header_v1(signal, infopacket, &payload_size);
 765         build_vrr_infopacket_data_v1(vrr, infopacket);
 766         build_vrr_infopacket_checksum(&payload_size, infopacket);
 767
 768         infopacket->valid = true;
 769 }
 770
 771 static void build_vrr_infopacket_v2(enum signal_type signal,
 772                 const struct mod_vrr_params *vrr,
 773                 enum color_transfer_func app_tf,
 774                 struct dc_info_packet *infopacket)
 775 {
 776         unsigned int payload_size = 0;
 777
 778         build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
 779         build_vrr_infopacket_data_v1(vrr, infopacket);
 780
 781         build_vrr_infopacket_fs2_data(app_tf, infopacket);
 782
 783         build_vrr_infopacket_checksum(&payload_size, infopacket);
 784
 785         infopacket->valid = true;
 786 }
 787 #ifndef TRIM_FSFT
 788 static void build_vrr_infopacket_fast_transport_data(
 789         bool ftActive,
 790         unsigned int ftOutputRate,
 791         struct dc_info_packet *infopacket)
 792 {
 793         /* PB9 : bit7 - fast transport Active*/
 794         unsigned char activeBit = (ftActive) ? 1 << 7 : 0;
 795
 796         infopacket->sb[1] &= ~activeBit;  //clear bit
 797         infopacket->sb[1] |=  activeBit;  //set bit
 798
 799         /* PB13 : Target Output Pixel Rate [kHz] - bits 7:0  */
 800         infopacket->sb[13] = ftOutputRate & 0xFF;
 801
 802         /* PB14 : Target Output Pixel Rate [kHz] - bits 15:8  */
 803         infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF;
 804
 805         /* PB15 : Target Output Pixel Rate [kHz] - bits 23:16  */
 806         infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF;
 807
 808 }
 809 #endif
 810
 811 static void build_vrr_infopacket_v3(enum signal_type signal,
 812                 const struct mod_vrr_params *vrr,
 813 #ifndef TRIM_FSFT
 814                 bool ftActive, unsigned int ftOutputRate,
 815 #endif
 816                 enum color_transfer_func app_tf,
 817                 struct dc_info_packet *infopacket)
 818 {
 819         unsigned int payload_size = 0;
 820
 821         build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
 822         build_vrr_infopacket_data_v3(vrr, infopacket);
 823
 824         build_vrr_infopacket_fs2_data(app_tf, infopacket);
 825
 826 #ifndef TRIM_FSFT
 827         build_vrr_infopacket_fast_transport_data(
 828                         ftActive,
 829                         ftOutputRate,
 830                         infopacket);
 831 #endif
 832
 833         build_vrr_infopacket_checksum(&payload_size, infopacket);
 834
 835         infopacket->valid = true;
 836 }
 837
 838 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 839                 const struct dc_stream_state *stream,
 840                 const struct mod_vrr_params *vrr,
 841                 enum vrr_packet_type packet_type,
 842                 enum color_transfer_func app_tf,
 843                 struct dc_info_packet *infopacket)
 844 {
 845         /* SPD info packet for FreeSync
 846          * VTEM info packet for HdmiVRR
 847          * Check if Freesync is supported. Return if false. If true,
 848          * set the corresponding bit in the info packet
 849          */
 850         if (!vrr->send_info_frame)
 851                 return;
 852
 853         switch (packet_type) {
 854         case PACKET_TYPE_FS_V3:
 855 #ifndef TRIM_FSFT
 856                 // always populate with pixel rate.
 857                 build_vrr_infopacket_v3(
 858                                 stream->signal, vrr,
 859                                 stream->timing.flags.FAST_TRANSPORT,
 860                                 (stream->timing.flags.FAST_TRANSPORT) ?
 861                                                 stream->timing.fast_transport_output_rate_100hz :
 862                                                 stream->timing.pix_clk_100hz,
 863                                 app_tf, infopacket);
 864 #else
 865                 build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket);
 866 #endif
 867                 break;
 868         case PACKET_TYPE_FS_V2:
 869                 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket);
 870                 break;
 871         case PACKET_TYPE_VRR:
 872         case PACKET_TYPE_FS_V1:
 873         default:
 874                 build_vrr_infopacket_v1(stream->signal, vrr, infopacket);
 875         }
 876 }
 877
 878 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 879                 const struct dc_stream_state *stream,
 880                 struct mod_freesync_config *in_config,
 881                 struct mod_vrr_params *in_out_vrr)
 882 {
 883         struct core_freesync *core_freesync = NULL;
 884         unsigned long long nominal_field_rate_in_uhz = 0;
 885         unsigned long long rounded_nominal_in_uhz = 0;
 886         unsigned int refresh_range = 0;
 887         unsigned long long min_refresh_in_uhz = 0;
 888         unsigned long long max_refresh_in_uhz = 0;
 889
 890         if (mod_freesync == NULL)
 891                 return;
 892
 893         core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
 894
 895         /* Calculate nominal field rate for stream */
 896         nominal_field_rate_in_uhz =
 897                         mod_freesync_calc_nominal_field_rate(stream);
 898
 899         min_refresh_in_uhz = in_config->min_refresh_in_uhz;
 900         max_refresh_in_uhz = in_config->max_refresh_in_uhz;
 901
 902         /* Full range may be larger than current video timing, so cap at nominal */
 903         if (max_refresh_in_uhz > nominal_field_rate_in_uhz)
 904                 max_refresh_in_uhz = nominal_field_rate_in_uhz;
 905
 906         /* Full range may be larger than current video timing, so cap at nominal */
 907         if (min_refresh_in_uhz > max_refresh_in_uhz)
 908                 min_refresh_in_uhz = max_refresh_in_uhz;
 909
 910         /* If a monitor reports exactly max refresh of 2x of min, enforce it on nominal */
 911         rounded_nominal_in_uhz =
 912                         div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000;
 913         if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) &&
 914                 in_config->max_refresh_in_uhz == rounded_nominal_in_uhz)
 915                 min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2);
 916
 917         if (!vrr_settings_require_update(core_freesync,
 918                         in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz,
 919                         in_out_vrr))
 920                 return;
 921
 922         in_out_vrr->state = in_config->state;
 923         in_out_vrr->send_info_frame = in_config->vsif_supported;
 924
 925         if (in_config->state == VRR_STATE_UNSUPPORTED) {
 926                 in_out_vrr->state = VRR_STATE_UNSUPPORTED;
 927                 in_out_vrr->supported = false;
 928                 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
 929                 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
 930
 931                 return;
 932
 933         } else {
 934                 in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz;
 935                 in_out_vrr->max_duration_in_us =
 936                                 calc_duration_in_us_from_refresh_in_uhz(
 937                                                 (unsigned int)min_refresh_in_uhz);
 938
 939                 in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz;
 940                 in_out_vrr->min_duration_in_us =
 941                                 calc_duration_in_us_from_refresh_in_uhz(
 942                                                 (unsigned int)max_refresh_in_uhz);
 943
 944                 if (in_config->state == VRR_STATE_ACTIVE_FIXED)
 945                         in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz;
 946                 else
 947                         in_out_vrr->fixed_refresh_in_uhz = 0;
 948
 949                 refresh_range = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) -
 950 +                               div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000);
 951
 952                 in_out_vrr->supported = true;
 953         }
 954
 955         in_out_vrr->fixed.ramping_active = in_config->ramping;
 956
 957         in_out_vrr->btr.btr_enabled = in_config->btr;
 958
 959         if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz))
 960                 in_out_vrr->btr.btr_enabled = false;
 961         else {
 962                 in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us -
 963                                 2 * in_out_vrr->min_duration_in_us;
 964                 if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN)
 965                         in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN;
 966         }
 967
 968         in_out_vrr->btr.btr_active = false;
 969         in_out_vrr->btr.inserted_duration_in_us = 0;
 970         in_out_vrr->btr.frames_to_insert = 0;
 971         in_out_vrr->btr.frame_counter = 0;
 972         in_out_vrr->fixed.fixed_active = false;
 973         in_out_vrr->fixed.target_refresh_in_uhz = 0;
 974
 975         in_out_vrr->btr.mid_point_in_us =
 976                                 (in_out_vrr->min_duration_in_us +
 977                                  in_out_vrr->max_duration_in_us) / 2;
 978
 979         if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) {
 980                 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
 981                 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
 982         } else if (in_out_vrr->state == VRR_STATE_DISABLED) {
 983                 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
 984                 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
 985         } else if (in_out_vrr->state == VRR_STATE_INACTIVE) {
 986                 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
 987                 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
 988         } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
 989                         refresh_range >= MIN_REFRESH_RANGE) {
 990
 991                 in_out_vrr->adjust.v_total_min =
 992                         calc_v_total_from_refresh(stream,
 993                                 in_out_vrr->max_refresh_in_uhz);
 994                 in_out_vrr->adjust.v_total_max =
 995                         calc_v_total_from_refresh(stream,
 996                                 in_out_vrr->min_refresh_in_uhz);
 997         } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) {
 998                 in_out_vrr->fixed.target_refresh_in_uhz =
 999                                 in_out_vrr->fixed_refresh_in_uhz;
1000                 if (in_out_vrr->fixed.ramping_active &&
1001                                 in_out_vrr->fixed.fixed_active) {
1002                         /* Do not update vtotals if ramping is already active
1003                          * in order to continue ramp from current refresh.
1004                          */
1005                         in_out_vrr->fixed.fixed_active = true;
1006                 } else {
1007                         in_out_vrr->fixed.fixed_active = true;
1008                         in_out_vrr->adjust.v_total_min =
1009                                 calc_v_total_from_refresh(stream,
1010                                         in_out_vrr->fixed.target_refresh_in_uhz);
1011                         in_out_vrr->adjust.v_total_max =
1012                                 in_out_vrr->adjust.v_total_min;
1013                 }
1014         } else {
1015                 in_out_vrr->state = VRR_STATE_INACTIVE;
1016                 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
1017                 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
1018         }
1019 }
1020
1021 void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
1022                 const struct dc_plane_state *plane,
1023                 const struct dc_stream_state *stream,
1024                 unsigned int curr_time_stamp_in_us,
1025                 struct mod_vrr_params *in_out_vrr)
1026 {
1027         struct core_freesync *core_freesync = NULL;
1028         unsigned int last_render_time_in_us = 0;
1029         unsigned int average_render_time_in_us = 0;
1030
1031         if (mod_freesync == NULL)
1032                 return;
1033
1034         core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1035
1036         if (in_out_vrr->supported &&
1037                         in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
1038                 unsigned int i = 0;
1039                 unsigned int oldest_index = plane->time.index + 1;
1040
1041                 if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
1042                         oldest_index = 0;
1043
1044                 last_render_time_in_us = curr_time_stamp_in_us -
1045                                 plane->time.prev_update_time_in_us;
1046
1047                 /* Sum off all entries except oldest one */
1048                 for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) {
1049                         average_render_time_in_us +=
1050                                         plane->time.time_elapsed_in_us[i];
1051                 }
1052                 average_render_time_in_us -=
1053                                 plane->time.time_elapsed_in_us[oldest_index];
1054
1055                 /* Add render time for current flip */
1056                 average_render_time_in_us += last_render_time_in_us;
1057                 average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX;
1058
1059                 if (in_out_vrr->btr.btr_enabled) {
1060                         apply_below_the_range(core_freesync,
1061                                         stream,
1062                                         last_render_time_in_us,
1063                                         in_out_vrr);
1064                 } else {
1065                         apply_fixed_refresh(core_freesync,
1066                                 stream,
1067                                 last_render_time_in_us,
1068                                 in_out_vrr);
1069                 }
1070
1071         }
1072 }
1073
1074 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
1075                 const struct dc_stream_state *stream,
1076                 struct mod_vrr_params *in_out_vrr)
1077 {
1078         struct core_freesync *core_freesync = NULL;
1079
1080         if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL))
1081                 return;
1082
1083         core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1084
1085         if (in_out_vrr->supported == false)
1086                 return;
1087
1088         /* Below the Range Logic */
1089
1090         /* Only execute if in fullscreen mode */
1091         if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
1092                                         in_out_vrr->btr.btr_active) {
1093                 /* TODO: pass in flag for Pre-DCE12 ASIC
1094                  * in order for frame variable duration to take affect,
1095                  * it needs to be done one VSYNC early, which is at
1096                  * frameCounter == 1.
1097                  * For DCE12 and newer updates to V_TOTAL_MIN/MAX
1098                  * will take affect on current frame
1099                  */
1100                 if (in_out_vrr->btr.frames_to_insert ==
1101                                 in_out_vrr->btr.frame_counter) {
1102                         in_out_vrr->adjust.v_total_min =
1103                                 calc_v_total_from_duration(stream,
1104                                 in_out_vrr,
1105                                 in_out_vrr->btr.inserted_duration_in_us);
1106                         in_out_vrr->adjust.v_total_max =
1107                                 in_out_vrr->adjust.v_total_min;
1108                 }
1109
1110                 if (in_out_vrr->btr.frame_counter > 0)
1111                         in_out_vrr->btr.frame_counter--;
1112
1113                 /* Restore FreeSync */
1114                 if (in_out_vrr->btr.frame_counter == 0) {
1115                         in_out_vrr->adjust.v_total_min =
1116                                 calc_v_total_from_refresh(stream,
1117                                 in_out_vrr->max_refresh_in_uhz);
1118                         in_out_vrr->adjust.v_total_max =
1119                                 calc_v_total_from_refresh(stream,
1120                                 in_out_vrr->min_refresh_in_uhz);
1121                 }
1122         }
1123
1124         /* If in fullscreen freesync mode or in video, do not program
1125          * static screen ramp values
1126          */
1127         if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE)
1128                 in_out_vrr->fixed.ramping_active = false;
1129
1130         /* Gradual Static Screen Ramping Logic
1131          * Execute if ramp is active and user enabled freesync static screen
1132          */
1133         if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED &&
1134                                 in_out_vrr->fixed.ramping_active) {
1135                 update_v_total_for_static_ramp(
1136                                 core_freesync, stream, in_out_vrr);
1137         }
1138 }
1139
1140 void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
1141                 const struct mod_vrr_params *vrr,
1142                 unsigned int *v_total_min, unsigned int *v_total_max,
1143                 unsigned int *event_triggers,
1144                 unsigned int *window_min, unsigned int *window_max,
1145                 unsigned int *lfc_mid_point_in_us,
1146                 unsigned int *inserted_frames,
1147                 unsigned int *inserted_duration_in_us)
1148 {
1149         if (mod_freesync == NULL)
1150                 return;
1151
1152         if (vrr->supported) {
1153                 *v_total_min = vrr->adjust.v_total_min;
1154                 *v_total_max = vrr->adjust.v_total_max;
1155                 *event_triggers = 0;
1156                 *lfc_mid_point_in_us = vrr->btr.mid_point_in_us;
1157                 *inserted_frames = vrr->btr.frames_to_insert;
1158                 *inserted_duration_in_us = vrr->btr.inserted_duration_in_us;
1159         }
1160 }
1161
1162 unsigned long long mod_freesync_calc_nominal_field_rate(
1163                         const struct dc_stream_state *stream)
1164 {
1165         unsigned long long nominal_field_rate_in_uhz = 0;
1166         unsigned int total = stream->timing.h_total * stream->timing.v_total;
1167
1168         /* Calculate nominal field rate for stream, rounded up to nearest integer */
1169         nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz;
1170         nominal_field_rate_in_uhz *= 100000000ULL;
1171
1172         nominal_field_rate_in_uhz =     div_u64(nominal_field_rate_in_uhz, total);
1173
1174         return nominal_field_rate_in_uhz;
1175 }
1176
1177 bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz,
1178                 uint32_t max_refresh_cap_in_uhz,
1179                 uint32_t nominal_field_rate_in_uhz)
1180 {
1181
1182         /* Typically nominal refresh calculated can have some fractional part.
1183          * Allow for some rounding error of actual video timing by taking floor
1184          * of caps and request. Round the nominal refresh rate.
1185          *
1186          * Dividing will convert everything to units in Hz although input
1187          * variable name is in uHz!
1188          *
1189          * Also note, this takes care of rounding error on the nominal refresh
1190          * so by rounding error we only expect it to be off by a small amount,
1191          * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx.
1192          *
1193          * Example 1. Caps    Min = 40 Hz, Max = 144 Hz
1194          *            Request Min = 40 Hz, Max = 144 Hz
1195          *                    Nominal = 143.5x Hz rounded to 144 Hz
1196          *            This function should allow this as valid request
1197          *
1198          * Example 2. Caps    Min = 40 Hz, Max = 144 Hz
1199          *            Request Min = 40 Hz, Max = 144 Hz
1200          *                    Nominal = 144.4x Hz rounded to 144 Hz
1201          *            This function should allow this as valid request
1202          *
1203          * Example 3. Caps    Min = 40 Hz, Max = 144 Hz
1204          *            Request Min = 40 Hz, Max = 144 Hz
1205          *                    Nominal = 120.xx Hz rounded to 120 Hz
1206          *            This function should return NOT valid since the requested
1207          *            max is greater than current timing's nominal
1208          *
1209          * Example 4. Caps    Min = 40 Hz, Max = 120 Hz
1210          *            Request Min = 40 Hz, Max = 120 Hz
1211          *                    Nominal = 144.xx Hz rounded to 144 Hz
1212          *            This function should return NOT valid since the nominal
1213          *            is greater than the capability's max refresh
1214          */
1215         nominal_field_rate_in_uhz =
1216                         div_u64(nominal_field_rate_in_uhz + 500000, 1000000);
1217         min_refresh_cap_in_uhz /= 1000000;
1218         max_refresh_cap_in_uhz /= 1000000;
1219
1220         /* Check nominal is within range */
1221         if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||
1222                 nominal_field_rate_in_uhz < min_refresh_cap_in_uhz)
1223                 return false;
1224
1225         /* If nominal is less than max, limit the max allowed refresh rate */
1226         if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz)
1227                 max_refresh_cap_in_uhz = nominal_field_rate_in_uhz;
1228
1229         /* Check min is within range */
1230         if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz)
1231                 return false;
1232
1233         /* For variable range, check for at least 10 Hz range */
1234         if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10)
1235                 return false;
1236
1237         return true;
1238 }
1239