1 /* 2 * Copyright 2016-2023 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 "dm_services.h" 27 #include "dc.h" 28 #include "mod_freesync.h" 29 #include "core_types.h" 30 31 #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 32 32 33 #define MIN_REFRESH_RANGE 10 34 /* Refresh rate ramp at a fixed rate of 65 Hz/second */ 35 #define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65) 36 /* Number of elements in the render times cache array */ 37 #define RENDER_TIMES_MAX_COUNT 10 38 /* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */ 39 #define BTR_MAX_MARGIN 2500 40 /* Threshold to change BTR multiplier (to avoid frequent changes) */ 41 #define BTR_DRIFT_MARGIN 2000 42 /* Threshold to exit fixed refresh rate */ 43 #define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 1 44 /* Number of consecutive frames to check before entering/exiting fixed refresh */ 45 #define FIXED_REFRESH_ENTER_FRAME_COUNT 5 46 #define FIXED_REFRESH_EXIT_FRAME_COUNT 10 47 /* Flip interval workaround constants */ 48 #define VSYNCS_BETWEEN_FLIP_THRESHOLD 2 49 #define FREESYNC_CONSEC_FLIP_AFTER_VSYNC 5 50 #define FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US 500 51 52 struct core_freesync { 53 struct mod_freesync public; 54 struct dc *dc; 55 }; 56 57 #define MOD_FREESYNC_TO_CORE(mod_freesync)\ 58 container_of(mod_freesync, struct core_freesync, public) 59 60 struct mod_freesync *mod_freesync_create(struct dc *dc) 61 { 62 struct core_freesync *core_freesync = 63 kzalloc(sizeof(struct core_freesync), GFP_KERNEL); 64 65 if (core_freesync == NULL) 66 goto fail_alloc_context; 67 68 if (dc == NULL) 69 goto fail_construct; 70 71 core_freesync->dc = dc; 72 return &core_freesync->public; 73 74 fail_construct: 75 kfree(core_freesync); 76 77 fail_alloc_context: 78 return NULL; 79 } 80 81 void mod_freesync_destroy(struct mod_freesync *mod_freesync) 82 { 83 struct core_freesync *core_freesync = NULL; 84 if (mod_freesync == NULL) 85 return; 86 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 87 kfree(core_freesync); 88 } 89 90 #if 0 /* Unused currently */ 91 static unsigned int calc_refresh_in_uhz_from_duration( 92 unsigned int duration_in_ns) 93 { 94 unsigned int refresh_in_uhz = 95 ((unsigned int)(div64_u64((1000000000ULL * 1000000), 96 duration_in_ns))); 97 return refresh_in_uhz; 98 } 99 #endif 100 101 static unsigned int calc_duration_in_us_from_refresh_in_uhz( 102 unsigned int refresh_in_uhz) 103 { 104 unsigned int duration_in_us = 105 ((unsigned int)(div64_u64((1000000000ULL * 1000), 106 refresh_in_uhz))); 107 return duration_in_us; 108 } 109 110 static unsigned int calc_duration_in_us_from_v_total( 111 const struct dc_stream_state *stream, 112 const struct mod_vrr_params *in_vrr, 113 unsigned int v_total) 114 { 115 unsigned int duration_in_us = 116 (unsigned int)(div64_u64(((unsigned long long)(v_total) 117 * 10000) * stream->timing.h_total, 118 stream->timing.pix_clk_100hz)); 119 120 return duration_in_us; 121 } 122 123 unsigned int mod_freesync_calc_v_total_from_refresh( 124 const struct dc_stream_state *stream, 125 unsigned int refresh_in_uhz) 126 { 127 unsigned int v_total; 128 unsigned int frame_duration_in_ns; 129 130 frame_duration_in_ns = 131 ((unsigned int)(div64_u64((1000000000ULL * 1000000), 132 refresh_in_uhz))); 133 134 v_total = div64_u64(div64_u64(((unsigned long long)( 135 frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)), 136 stream->timing.h_total) + 500000, 1000000); 137 138 /* v_total cannot be less than nominal */ 139 if (v_total < stream->timing.v_total) { 140 ASSERT(v_total < stream->timing.v_total); 141 v_total = stream->timing.v_total; 142 } 143 144 return v_total; 145 } 146 147 static unsigned int calc_v_total_from_duration( 148 const struct dc_stream_state *stream, 149 const struct mod_vrr_params *vrr, 150 unsigned int duration_in_us) 151 { 152 unsigned int v_total = 0; 153 154 if (duration_in_us < vrr->min_duration_in_us) 155 duration_in_us = vrr->min_duration_in_us; 156 157 if (duration_in_us > vrr->max_duration_in_us) 158 duration_in_us = vrr->max_duration_in_us; 159 160 if (dc_is_hdmi_signal(stream->signal)) { 161 uint32_t h_total_up_scaled; 162 163 h_total_up_scaled = stream->timing.h_total * 10000; 164 v_total = div_u64((unsigned long long)duration_in_us 165 * stream->timing.pix_clk_100hz + (h_total_up_scaled - 1), 166 h_total_up_scaled); 167 } else { 168 v_total = div64_u64(div64_u64(((unsigned long long)( 169 duration_in_us) * (stream->timing.pix_clk_100hz / 10)), 170 stream->timing.h_total), 1000); 171 } 172 173 /* v_total cannot be less than nominal */ 174 if (v_total < stream->timing.v_total) { 175 ASSERT(v_total < stream->timing.v_total); 176 v_total = stream->timing.v_total; 177 } 178 179 return v_total; 180 } 181 182 static void update_v_total_for_static_ramp( 183 struct core_freesync *core_freesync, 184 const struct dc_stream_state *stream, 185 struct mod_vrr_params *in_out_vrr) 186 { 187 unsigned int v_total = 0; 188 unsigned int current_duration_in_us = 189 calc_duration_in_us_from_v_total( 190 stream, in_out_vrr, 191 in_out_vrr->adjust.v_total_max); 192 unsigned int target_duration_in_us = 193 calc_duration_in_us_from_refresh_in_uhz( 194 in_out_vrr->fixed.target_refresh_in_uhz); 195 bool ramp_direction_is_up = (current_duration_in_us > 196 target_duration_in_us) ? true : false; 197 198 /* Calculate ratio between new and current frame duration with 3 digit */ 199 unsigned int frame_duration_ratio = div64_u64(1000000, 200 (1000 + div64_u64(((unsigned long long)( 201 STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) * 202 current_duration_in_us), 203 1000000))); 204 205 /* Calculate delta between new and current frame duration in us */ 206 unsigned int frame_duration_delta = div64_u64(((unsigned long long)( 207 current_duration_in_us) * 208 (1000 - frame_duration_ratio)), 1000); 209 210 /* Adjust frame duration delta based on ratio between current and 211 * standard frame duration (frame duration at 60 Hz refresh rate). 212 */ 213 unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)( 214 frame_duration_delta) * current_duration_in_us), 16666); 215 216 /* Going to a higher refresh rate (lower frame duration) */ 217 if (ramp_direction_is_up) { 218 /* Reduce frame duration */ 219 current_duration_in_us -= ramp_rate_interpolated; 220 221 /* Adjust for frame duration below min */ 222 if (current_duration_in_us <= target_duration_in_us) { 223 in_out_vrr->fixed.ramping_active = false; 224 in_out_vrr->fixed.ramping_done = true; 225 current_duration_in_us = 226 calc_duration_in_us_from_refresh_in_uhz( 227 in_out_vrr->fixed.target_refresh_in_uhz); 228 } 229 /* Going to a lower refresh rate (larger frame duration) */ 230 } else { 231 /* Increase frame duration */ 232 current_duration_in_us += ramp_rate_interpolated; 233 234 /* Adjust for frame duration above max */ 235 if (current_duration_in_us >= target_duration_in_us) { 236 in_out_vrr->fixed.ramping_active = false; 237 in_out_vrr->fixed.ramping_done = true; 238 current_duration_in_us = 239 calc_duration_in_us_from_refresh_in_uhz( 240 in_out_vrr->fixed.target_refresh_in_uhz); 241 } 242 } 243 244 v_total = div64_u64(div64_u64(((unsigned long long)( 245 current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)), 246 stream->timing.h_total), 1000); 247 248 /* v_total cannot be less than nominal */ 249 if (v_total < stream->timing.v_total) 250 v_total = stream->timing.v_total; 251 252 in_out_vrr->adjust.v_total_min = v_total; 253 in_out_vrr->adjust.v_total_max = v_total; 254 } 255 256 static void apply_below_the_range(struct core_freesync *core_freesync, 257 const struct dc_stream_state *stream, 258 unsigned int last_render_time_in_us, 259 struct mod_vrr_params *in_out_vrr) 260 { 261 unsigned int inserted_frame_duration_in_us = 0; 262 unsigned int mid_point_frames_ceil = 0; 263 unsigned int mid_point_frames_floor = 0; 264 unsigned int frame_time_in_us = 0; 265 unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF; 266 unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF; 267 unsigned int frames_to_insert = 0; 268 unsigned int delta_from_mid_point_delta_in_us; 269 unsigned int max_render_time_in_us = 270 in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us; 271 272 /* Program BTR */ 273 if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) { 274 /* Exit Below the Range */ 275 if (in_out_vrr->btr.btr_active) { 276 in_out_vrr->btr.frame_counter = 0; 277 in_out_vrr->btr.btr_active = false; 278 } 279 } else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) { 280 /* Enter Below the Range */ 281 if (!in_out_vrr->btr.btr_active) { 282 in_out_vrr->btr.btr_active = true; 283 } 284 } 285 286 /* BTR set to "not active" so disengage */ 287 if (!in_out_vrr->btr.btr_active) { 288 in_out_vrr->btr.inserted_duration_in_us = 0; 289 in_out_vrr->btr.frames_to_insert = 0; 290 in_out_vrr->btr.frame_counter = 0; 291 292 /* Restore FreeSync */ 293 in_out_vrr->adjust.v_total_min = 294 mod_freesync_calc_v_total_from_refresh(stream, 295 in_out_vrr->max_refresh_in_uhz); 296 in_out_vrr->adjust.v_total_max = 297 mod_freesync_calc_v_total_from_refresh(stream, 298 in_out_vrr->min_refresh_in_uhz); 299 /* BTR set to "active" so engage */ 300 } else { 301 302 /* Calculate number of midPoint frames that could fit within 303 * the render time interval - take ceil of this value 304 */ 305 mid_point_frames_ceil = (last_render_time_in_us + 306 in_out_vrr->btr.mid_point_in_us - 1) / 307 in_out_vrr->btr.mid_point_in_us; 308 309 if (mid_point_frames_ceil > 0) { 310 frame_time_in_us = last_render_time_in_us / 311 mid_point_frames_ceil; 312 delta_from_mid_point_in_us_1 = 313 (in_out_vrr->btr.mid_point_in_us > 314 frame_time_in_us) ? 315 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : 316 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); 317 } 318 319 /* Calculate number of midPoint frames that could fit within 320 * the render time interval - take floor of this value 321 */ 322 mid_point_frames_floor = last_render_time_in_us / 323 in_out_vrr->btr.mid_point_in_us; 324 325 if (mid_point_frames_floor > 0) { 326 327 frame_time_in_us = last_render_time_in_us / 328 mid_point_frames_floor; 329 delta_from_mid_point_in_us_2 = 330 (in_out_vrr->btr.mid_point_in_us > 331 frame_time_in_us) ? 332 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : 333 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); 334 } 335 336 /* Choose number of frames to insert based on how close it 337 * can get to the mid point of the variable range. 338 * - Delta for CEIL: delta_from_mid_point_in_us_1 339 * - Delta for FLOOR: delta_from_mid_point_in_us_2 340 */ 341 if (mid_point_frames_ceil && 342 (last_render_time_in_us / mid_point_frames_ceil) < 343 in_out_vrr->min_duration_in_us) { 344 /* Check for out of range. 345 * If using CEIL produces a value that is out of range, 346 * then we are forced to use FLOOR. 347 */ 348 frames_to_insert = mid_point_frames_floor; 349 } else if (mid_point_frames_floor < 2) { 350 /* Check if FLOOR would result in non-LFC. In this case 351 * choose to use CEIL 352 */ 353 frames_to_insert = mid_point_frames_ceil; 354 } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { 355 /* If choosing CEIL results in a frame duration that is 356 * closer to the mid point of the range. 357 * Choose CEIL 358 */ 359 frames_to_insert = mid_point_frames_ceil; 360 } else { 361 /* If choosing FLOOR results in a frame duration that is 362 * closer to the mid point of the range. 363 * Choose FLOOR 364 */ 365 frames_to_insert = mid_point_frames_floor; 366 } 367 368 /* Prefer current frame multiplier when BTR is enabled unless it drifts 369 * too far from the midpoint 370 */ 371 if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { 372 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 - 373 delta_from_mid_point_in_us_1; 374 } else { 375 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 - 376 delta_from_mid_point_in_us_2; 377 } 378 if (in_out_vrr->btr.frames_to_insert != 0 && 379 delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) { 380 if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) < 381 max_render_time_in_us) && 382 ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) > 383 in_out_vrr->min_duration_in_us)) 384 frames_to_insert = in_out_vrr->btr.frames_to_insert; 385 } 386 387 /* Either we've calculated the number of frames to insert, 388 * or we need to insert min duration frames 389 */ 390 if (frames_to_insert && 391 (last_render_time_in_us / frames_to_insert) < 392 in_out_vrr->min_duration_in_us){ 393 frames_to_insert -= (frames_to_insert > 1) ? 394 1 : 0; 395 } 396 397 if (frames_to_insert > 0) 398 inserted_frame_duration_in_us = last_render_time_in_us / 399 frames_to_insert; 400 401 if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us) 402 inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us; 403 404 /* Cache the calculated variables */ 405 in_out_vrr->btr.inserted_duration_in_us = 406 inserted_frame_duration_in_us; 407 in_out_vrr->btr.frames_to_insert = frames_to_insert; 408 in_out_vrr->btr.frame_counter = frames_to_insert; 409 } 410 } 411 412 static void apply_fixed_refresh(struct core_freesync *core_freesync, 413 const struct dc_stream_state *stream, 414 unsigned int last_render_time_in_us, 415 struct mod_vrr_params *in_out_vrr) 416 { 417 bool update = false; 418 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us; 419 420 /* Compute the exit refresh rate and exit frame duration */ 421 unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us) 422 + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ)); 423 unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz; 424 425 if (last_render_time_in_us < exit_frame_duration_in_us) { 426 /* Exit 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_EXIT_FRAME_COUNT) { 432 in_out_vrr->fixed.frame_counter = 0; 433 in_out_vrr->fixed.fixed_active = false; 434 in_out_vrr->fixed.target_refresh_in_uhz = 0; 435 update = true; 436 } 437 } else 438 in_out_vrr->fixed.frame_counter = 0; 439 } else if (last_render_time_in_us > max_render_time_in_us) { 440 /* Enter Fixed Refresh mode */ 441 if (!in_out_vrr->fixed.fixed_active) { 442 in_out_vrr->fixed.frame_counter++; 443 444 if (in_out_vrr->fixed.frame_counter > 445 FIXED_REFRESH_ENTER_FRAME_COUNT) { 446 in_out_vrr->fixed.frame_counter = 0; 447 in_out_vrr->fixed.fixed_active = true; 448 in_out_vrr->fixed.target_refresh_in_uhz = 449 in_out_vrr->max_refresh_in_uhz; 450 update = true; 451 } 452 } else 453 in_out_vrr->fixed.frame_counter = 0; 454 } 455 456 if (update) { 457 if (in_out_vrr->fixed.fixed_active) { 458 in_out_vrr->adjust.v_total_min = 459 mod_freesync_calc_v_total_from_refresh( 460 stream, in_out_vrr->max_refresh_in_uhz); 461 in_out_vrr->adjust.v_total_max = 462 in_out_vrr->adjust.v_total_min; 463 } else { 464 in_out_vrr->adjust.v_total_min = 465 mod_freesync_calc_v_total_from_refresh(stream, 466 in_out_vrr->max_refresh_in_uhz); 467 in_out_vrr->adjust.v_total_max = 468 mod_freesync_calc_v_total_from_refresh(stream, 469 in_out_vrr->min_refresh_in_uhz); 470 } 471 } 472 } 473 474 static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr, 475 unsigned int curr_time_stamp_in_us) 476 { 477 in_vrr->flip_interval.vsync_to_flip_in_us = curr_time_stamp_in_us - 478 in_vrr->flip_interval.v_update_timestamp_in_us; 479 480 /* Determine conditions for stopping workaround */ 481 if (in_vrr->flip_interval.flip_interval_workaround_active && 482 in_vrr->flip_interval.vsyncs_between_flip < VSYNCS_BETWEEN_FLIP_THRESHOLD && 483 in_vrr->flip_interval.vsync_to_flip_in_us > FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { 484 in_vrr->flip_interval.flip_interval_detect_counter = 0; 485 in_vrr->flip_interval.program_flip_interval_workaround = true; 486 in_vrr->flip_interval.flip_interval_workaround_active = false; 487 } else { 488 /* Determine conditions for starting workaround */ 489 if (in_vrr->flip_interval.vsyncs_between_flip >= VSYNCS_BETWEEN_FLIP_THRESHOLD && 490 in_vrr->flip_interval.vsync_to_flip_in_us < FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { 491 /* Increase flip interval counter we have 2 vsyncs between flips and 492 * vsync to flip interval is less than 500us 493 */ 494 in_vrr->flip_interval.flip_interval_detect_counter++; 495 if (in_vrr->flip_interval.flip_interval_detect_counter > FREESYNC_CONSEC_FLIP_AFTER_VSYNC) { 496 /* Start workaround if we detect 5 consecutive instances of the above case */ 497 in_vrr->flip_interval.program_flip_interval_workaround = true; 498 in_vrr->flip_interval.flip_interval_workaround_active = true; 499 } 500 } else { 501 /* Reset the flip interval counter if we condition is no longer met */ 502 in_vrr->flip_interval.flip_interval_detect_counter = 0; 503 } 504 } 505 506 in_vrr->flip_interval.vsyncs_between_flip = 0; 507 } 508 509 static bool vrr_settings_require_update(struct core_freesync *core_freesync, 510 struct mod_freesync_config *in_config, 511 unsigned int min_refresh_in_uhz, 512 unsigned int max_refresh_in_uhz, 513 struct mod_vrr_params *in_vrr) 514 { 515 if (in_vrr->state != in_config->state) { 516 return true; 517 } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED && 518 in_vrr->fixed.target_refresh_in_uhz != 519 in_config->fixed_refresh_in_uhz) { 520 return true; 521 } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) { 522 return true; 523 } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) { 524 return true; 525 } 526 527 return false; 528 } 529 530 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync, 531 const struct dc_stream_state *stream, 532 unsigned int *vmin, 533 unsigned int *vmax) 534 { 535 *vmin = stream->adjust.v_total_min; 536 *vmax = stream->adjust.v_total_max; 537 538 return true; 539 } 540 541 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync, 542 struct dc_stream_state *stream, 543 unsigned int *nom_v_pos, 544 unsigned int *v_pos) 545 { 546 struct core_freesync *core_freesync = NULL; 547 struct crtc_position position; 548 549 if (mod_freesync == NULL) 550 return false; 551 552 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 553 554 if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1, 555 &position.vertical_count, 556 &position.nominal_vcount)) { 557 558 *nom_v_pos = position.nominal_vcount; 559 *v_pos = position.vertical_count; 560 561 return true; 562 } 563 564 return false; 565 } 566 567 static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr, 568 struct dc_info_packet *infopacket, 569 bool freesync_on_desktop) 570 { 571 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ 572 infopacket->sb[1] = 0x1A; 573 574 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ 575 infopacket->sb[2] = 0x00; 576 577 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ 578 infopacket->sb[3] = 0x00; 579 580 /* PB4 = Reserved */ 581 582 /* PB5 = Reserved */ 583 584 /* PB6 = [Bits 7:3 = Reserved] */ 585 586 /* PB6 = [Bit 0 = FreeSync Supported] */ 587 if (vrr->state != VRR_STATE_UNSUPPORTED) 588 infopacket->sb[6] |= 0x01; 589 590 /* PB6 = [Bit 1 = FreeSync Enabled] */ 591 if (vrr->state != VRR_STATE_DISABLED && 592 vrr->state != VRR_STATE_UNSUPPORTED) 593 infopacket->sb[6] |= 0x02; 594 595 if (freesync_on_desktop) { 596 /* PB6 = [Bit 2 = FreeSync Active] */ 597 if (vrr->state != VRR_STATE_DISABLED && 598 vrr->state != VRR_STATE_UNSUPPORTED) 599 infopacket->sb[6] |= 0x04; 600 } else { 601 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 602 vrr->state == VRR_STATE_ACTIVE_FIXED) 603 infopacket->sb[6] |= 0x04; 604 } 605 606 // For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range 607 /* PB7 = FreeSync Minimum refresh rate (Hz) */ 608 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 609 vrr->state == VRR_STATE_ACTIVE_FIXED) { 610 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000); 611 } else { 612 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); 613 } 614 615 /* PB8 = FreeSync Maximum refresh rate (Hz) 616 * Note: We should never go above the field rate of the mode timing set. 617 */ 618 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); 619 } 620 621 static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, 622 struct dc_info_packet *infopacket, 623 bool freesync_on_desktop) 624 { 625 unsigned int min_refresh; 626 unsigned int max_refresh; 627 unsigned int fixed_refresh; 628 unsigned int min_programmed; 629 unsigned int max_programmed; 630 631 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ 632 infopacket->sb[1] = 0x1A; 633 634 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ 635 infopacket->sb[2] = 0x00; 636 637 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ 638 infopacket->sb[3] = 0x00; 639 640 /* PB4 = Reserved */ 641 642 /* PB5 = Reserved */ 643 644 /* PB6 = [Bits 7:3 = Reserved] */ 645 646 /* PB6 = [Bit 0 = FreeSync Supported] */ 647 if (vrr->state != VRR_STATE_UNSUPPORTED) 648 infopacket->sb[6] |= 0x01; 649 650 /* PB6 = [Bit 1 = FreeSync Enabled] */ 651 if (vrr->state != VRR_STATE_DISABLED && 652 vrr->state != VRR_STATE_UNSUPPORTED) 653 infopacket->sb[6] |= 0x02; 654 655 /* PB6 = [Bit 2 = FreeSync Active] */ 656 if (freesync_on_desktop) { 657 if (vrr->state != VRR_STATE_DISABLED && 658 vrr->state != VRR_STATE_UNSUPPORTED) 659 infopacket->sb[6] |= 0x04; 660 } else { 661 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 662 vrr->state == VRR_STATE_ACTIVE_FIXED) 663 infopacket->sb[6] |= 0x04; 664 } 665 666 min_refresh = (vrr->min_refresh_in_uhz + 500000) / 1000000; 667 max_refresh = (vrr->max_refresh_in_uhz + 500000) / 1000000; 668 fixed_refresh = (vrr->fixed_refresh_in_uhz + 500000) / 1000000; 669 670 min_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : 671 (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? min_refresh : 672 (vrr->state == VRR_STATE_INACTIVE) ? min_refresh : 673 max_refresh; // Non-fs case, program nominal range 674 675 max_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : 676 (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? max_refresh : 677 max_refresh;// Non-fs case, program nominal range 678 679 /* PB7 = FreeSync Minimum refresh rate (Hz) */ 680 infopacket->sb[7] = min_programmed & 0xFF; 681 682 /* PB8 = FreeSync Maximum refresh rate (Hz) */ 683 infopacket->sb[8] = max_programmed & 0xFF; 684 685 /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */ 686 infopacket->sb[11] = (min_programmed >> 8) & 0x03; 687 688 /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */ 689 infopacket->sb[12] = (max_programmed >> 8) & 0x03; 690 691 /* PB16 : Reserved bits 7:1, FixedRate bit 0 */ 692 infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0; 693 } 694 695 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf, 696 struct dc_info_packet *infopacket) 697 { 698 if (app_tf != TRANSFER_FUNC_UNKNOWN) { 699 infopacket->valid = true; 700 701 if (app_tf != TRANSFER_FUNC_PQ2084) { 702 infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active] 703 if (app_tf == TRANSFER_FUNC_GAMMA_22) 704 infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active] 705 } 706 } 707 } 708 709 static void build_vrr_infopacket_header_v1(enum signal_type signal, 710 struct dc_info_packet *infopacket, 711 unsigned int *payload_size) 712 { 713 if (dc_is_hdmi_signal(signal)) { 714 715 /* HEADER */ 716 717 /* HB0 = Packet Type = 0x83 (Source Product 718 * Descriptor InfoFrame) 719 */ 720 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 721 722 /* HB1 = Version = 0x01 */ 723 infopacket->hb1 = 0x01; 724 725 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */ 726 infopacket->hb2 = 0x08; 727 728 *payload_size = 0x08; 729 730 } else if (dc_is_dp_signal(signal)) { 731 732 /* HEADER */ 733 734 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 735 * when used to associate audio related info packets 736 */ 737 infopacket->hb0 = 0x00; 738 739 /* HB1 = Packet Type = 0x83 (Source Product 740 * Descriptor InfoFrame) 741 */ 742 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 743 744 /* HB2 = [Bits 7:0 = Least significant eight bits - 745 * For INFOFRAME, the value must be 1Bh] 746 */ 747 infopacket->hb2 = 0x1B; 748 749 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1] 750 * [Bits 1:0 = Most significant two bits = 0x00] 751 */ 752 infopacket->hb3 = 0x04; 753 754 *payload_size = 0x1B; 755 } 756 } 757 758 static void build_vrr_infopacket_header_v2(enum signal_type signal, 759 struct dc_info_packet *infopacket, 760 unsigned int *payload_size) 761 { 762 if (dc_is_hdmi_signal(signal)) { 763 764 /* HEADER */ 765 766 /* HB0 = Packet Type = 0x83 (Source Product 767 * Descriptor InfoFrame) 768 */ 769 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 770 771 /* HB1 = Version = 0x02 */ 772 infopacket->hb1 = 0x02; 773 774 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */ 775 infopacket->hb2 = 0x09; 776 777 *payload_size = 0x09; 778 } else if (dc_is_dp_signal(signal)) { 779 780 /* HEADER */ 781 782 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 783 * when used to associate audio related info packets 784 */ 785 infopacket->hb0 = 0x00; 786 787 /* HB1 = Packet Type = 0x83 (Source Product 788 * Descriptor InfoFrame) 789 */ 790 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 791 792 /* HB2 = [Bits 7:0 = Least significant eight bits - 793 * For INFOFRAME, the value must be 1Bh] 794 */ 795 infopacket->hb2 = 0x1B; 796 797 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2] 798 * [Bits 1:0 = Most significant two bits = 0x00] 799 */ 800 infopacket->hb3 = 0x08; 801 802 *payload_size = 0x1B; 803 } 804 } 805 806 static void build_vrr_infopacket_header_v3(enum signal_type signal, 807 struct dc_info_packet *infopacket, 808 unsigned int *payload_size) 809 { 810 unsigned char version; 811 812 version = 3; 813 if (dc_is_hdmi_signal(signal)) { 814 815 /* HEADER */ 816 817 /* HB0 = Packet Type = 0x83 (Source Product 818 * Descriptor InfoFrame) 819 */ 820 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 821 822 /* HB1 = Version = 0x03 */ 823 infopacket->hb1 = version; 824 825 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length] */ 826 infopacket->hb2 = 0x10; 827 828 *payload_size = 0x10; 829 } else if (dc_is_dp_signal(signal)) { 830 831 /* HEADER */ 832 833 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 834 * when used to associate audio related info packets 835 */ 836 infopacket->hb0 = 0x00; 837 838 /* HB1 = Packet Type = 0x83 (Source Product 839 * Descriptor InfoFrame) 840 */ 841 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 842 843 /* HB2 = [Bits 7:0 = Least significant eight bits - 844 * For INFOFRAME, the value must be 1Bh] 845 */ 846 infopacket->hb2 = 0x1B; 847 848 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2] 849 * [Bits 1:0 = Most significant two bits = 0x00] 850 */ 851 852 infopacket->hb3 = (version & 0x3F) << 2; 853 854 *payload_size = 0x1B; 855 } 856 } 857 858 static void build_vrr_infopacket_checksum(unsigned int *payload_size, 859 struct dc_info_packet *infopacket) 860 { 861 /* Calculate checksum */ 862 unsigned int idx = 0; 863 unsigned char checksum = 0; 864 865 checksum += infopacket->hb0; 866 checksum += infopacket->hb1; 867 checksum += infopacket->hb2; 868 checksum += infopacket->hb3; 869 870 for (idx = 1; idx <= *payload_size; idx++) 871 checksum += infopacket->sb[idx]; 872 873 /* PB0 = Checksum (one byte complement) */ 874 infopacket->sb[0] = (unsigned char)(0x100 - checksum); 875 876 infopacket->valid = true; 877 } 878 879 static void build_vrr_infopacket_v1(enum signal_type signal, 880 const struct mod_vrr_params *vrr, 881 struct dc_info_packet *infopacket, 882 bool freesync_on_desktop) 883 { 884 /* SPD info packet for FreeSync */ 885 unsigned int payload_size = 0; 886 887 build_vrr_infopacket_header_v1(signal, infopacket, &payload_size); 888 build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop); 889 build_vrr_infopacket_checksum(&payload_size, infopacket); 890 891 infopacket->valid = true; 892 } 893 894 static void build_vrr_infopacket_v2(enum signal_type signal, 895 const struct mod_vrr_params *vrr, 896 enum color_transfer_func app_tf, 897 struct dc_info_packet *infopacket, 898 bool freesync_on_desktop) 899 { 900 unsigned int payload_size = 0; 901 902 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size); 903 build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop); 904 905 build_vrr_infopacket_fs2_data(app_tf, infopacket); 906 907 build_vrr_infopacket_checksum(&payload_size, infopacket); 908 909 infopacket->valid = true; 910 } 911 912 static void build_vrr_infopacket_v3(enum signal_type signal, 913 const struct mod_vrr_params *vrr, 914 enum color_transfer_func app_tf, 915 struct dc_info_packet *infopacket, 916 bool freesync_on_desktop) 917 { 918 unsigned int payload_size = 0; 919 920 build_vrr_infopacket_header_v3(signal, infopacket, &payload_size); 921 build_vrr_infopacket_data_v3(vrr, infopacket, freesync_on_desktop); 922 923 build_vrr_infopacket_fs2_data(app_tf, infopacket); 924 925 build_vrr_infopacket_checksum(&payload_size, infopacket); 926 927 infopacket->valid = true; 928 } 929 930 static void build_vrr_infopacket_sdp_v1_3(enum vrr_packet_type packet_type, 931 struct dc_info_packet *infopacket) 932 { 933 uint8_t idx = 0, size = 0; 934 935 size = ((packet_type == PACKET_TYPE_FS_V1) ? 0x08 : 936 (packet_type == PACKET_TYPE_FS_V3) ? 0x10 : 937 0x09); 938 939 for (idx = infopacket->hb2; idx > 1; idx--) // Data Byte Count: 0x1B 940 infopacket->sb[idx] = infopacket->sb[idx-1]; 941 942 infopacket->sb[1] = size; // Length 943 infopacket->sb[0] = (infopacket->hb3 >> 2) & 0x3F;//Version 944 infopacket->hb3 = (0x13 << 2); // Header,SDP 1.3 945 infopacket->hb2 = 0x1D; 946 } 947 948 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync, 949 const struct dc_stream_state *stream, 950 const struct mod_vrr_params *vrr, 951 enum vrr_packet_type packet_type, 952 enum color_transfer_func app_tf, 953 struct dc_info_packet *infopacket, 954 bool pack_sdp_v1_3) 955 { 956 /* SPD info packet for FreeSync 957 * VTEM info packet for HdmiVRR 958 * Check if Freesync is supported. Return if false. If true, 959 * set the corresponding bit in the info packet 960 */ 961 if (!vrr->send_info_frame) 962 return; 963 964 switch (packet_type) { 965 case PACKET_TYPE_FS_V3: 966 build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop); 967 break; 968 case PACKET_TYPE_FS_V2: 969 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop); 970 break; 971 case PACKET_TYPE_VRR: 972 case PACKET_TYPE_FS_V1: 973 default: 974 build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop); 975 } 976 977 if (true == pack_sdp_v1_3 && 978 true == dc_is_dp_signal(stream->signal) && 979 packet_type != PACKET_TYPE_VRR && 980 packet_type != PACKET_TYPE_VTEM) 981 build_vrr_infopacket_sdp_v1_3(packet_type, infopacket); 982 } 983 984 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, 985 const struct dc_stream_state *stream, 986 struct mod_freesync_config *in_config, 987 struct mod_vrr_params *in_out_vrr) 988 { 989 struct core_freesync *core_freesync = NULL; 990 unsigned long long nominal_field_rate_in_uhz = 0; 991 unsigned long long rounded_nominal_in_uhz = 0; 992 unsigned int refresh_range = 0; 993 unsigned long long min_refresh_in_uhz = 0; 994 unsigned long long max_refresh_in_uhz = 0; 995 unsigned long long min_hardware_refresh_in_uhz = 0; 996 997 if (mod_freesync == NULL) 998 return; 999 1000 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1001 1002 /* Calculate nominal field rate for stream */ 1003 nominal_field_rate_in_uhz = 1004 mod_freesync_calc_nominal_field_rate(stream); 1005 1006 if (stream->ctx->dc->caps.max_v_total != 0 && stream->timing.h_total != 0) { 1007 min_hardware_refresh_in_uhz = div64_u64((stream->timing.pix_clk_100hz * 100000000ULL), 1008 (stream->timing.h_total * stream->ctx->dc->caps.max_v_total)); 1009 } 1010 /* Limit minimum refresh rate to what can be supported by hardware */ 1011 min_refresh_in_uhz = min_hardware_refresh_in_uhz > in_config->min_refresh_in_uhz ? 1012 min_hardware_refresh_in_uhz : in_config->min_refresh_in_uhz; 1013 max_refresh_in_uhz = in_config->max_refresh_in_uhz; 1014 1015 /* Full range may be larger than current video timing, so cap at nominal */ 1016 if (max_refresh_in_uhz > nominal_field_rate_in_uhz) 1017 max_refresh_in_uhz = nominal_field_rate_in_uhz; 1018 1019 /* Full range may be larger than current video timing, so cap at nominal */ 1020 if (min_refresh_in_uhz > max_refresh_in_uhz) 1021 min_refresh_in_uhz = max_refresh_in_uhz; 1022 1023 /* If a monitor reports exactly max refresh of 2x of min, enforce it on nominal */ 1024 rounded_nominal_in_uhz = 1025 div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000; 1026 if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) && 1027 in_config->max_refresh_in_uhz == rounded_nominal_in_uhz) 1028 min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2); 1029 1030 if (!vrr_settings_require_update(core_freesync, 1031 in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz, 1032 in_out_vrr)) 1033 return; 1034 1035 in_out_vrr->state = in_config->state; 1036 in_out_vrr->send_info_frame = in_config->vsif_supported; 1037 1038 if (in_config->state == VRR_STATE_UNSUPPORTED) { 1039 in_out_vrr->state = VRR_STATE_UNSUPPORTED; 1040 in_out_vrr->supported = false; 1041 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1042 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1043 1044 return; 1045 1046 } else { 1047 in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz; 1048 in_out_vrr->max_duration_in_us = 1049 calc_duration_in_us_from_refresh_in_uhz( 1050 (unsigned int)min_refresh_in_uhz); 1051 1052 in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz; 1053 in_out_vrr->min_duration_in_us = 1054 calc_duration_in_us_from_refresh_in_uhz( 1055 (unsigned int)max_refresh_in_uhz); 1056 1057 if (in_config->state == VRR_STATE_ACTIVE_FIXED) 1058 in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz; 1059 else 1060 in_out_vrr->fixed_refresh_in_uhz = 0; 1061 1062 refresh_range = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) - 1063 + div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000); 1064 1065 in_out_vrr->supported = true; 1066 } 1067 1068 in_out_vrr->fixed.ramping_active = in_config->ramping; 1069 1070 in_out_vrr->btr.btr_enabled = in_config->btr; 1071 1072 if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz)) 1073 in_out_vrr->btr.btr_enabled = false; 1074 else { 1075 in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us - 1076 2 * in_out_vrr->min_duration_in_us; 1077 if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN) 1078 in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN; 1079 } 1080 1081 in_out_vrr->btr.btr_active = false; 1082 in_out_vrr->btr.inserted_duration_in_us = 0; 1083 in_out_vrr->btr.frames_to_insert = 0; 1084 in_out_vrr->btr.frame_counter = 0; 1085 in_out_vrr->fixed.fixed_active = false; 1086 in_out_vrr->fixed.target_refresh_in_uhz = 0; 1087 1088 in_out_vrr->btr.mid_point_in_us = 1089 (in_out_vrr->min_duration_in_us + 1090 in_out_vrr->max_duration_in_us) / 2; 1091 1092 if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) { 1093 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1094 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1095 } else if (in_out_vrr->state == VRR_STATE_DISABLED) { 1096 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1097 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1098 } else if (in_out_vrr->state == VRR_STATE_INACTIVE) { 1099 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1100 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1101 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1102 refresh_range >= MIN_REFRESH_RANGE) { 1103 1104 in_out_vrr->adjust.v_total_min = 1105 mod_freesync_calc_v_total_from_refresh(stream, 1106 in_out_vrr->max_refresh_in_uhz); 1107 in_out_vrr->adjust.v_total_max = 1108 mod_freesync_calc_v_total_from_refresh(stream, 1109 in_out_vrr->min_refresh_in_uhz); 1110 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) { 1111 in_out_vrr->fixed.target_refresh_in_uhz = 1112 in_out_vrr->fixed_refresh_in_uhz; 1113 if (in_out_vrr->fixed.ramping_active && 1114 in_out_vrr->fixed.fixed_active) { 1115 /* Do not update vtotals if ramping is already active 1116 * in order to continue ramp from current refresh. 1117 */ 1118 in_out_vrr->fixed.fixed_active = true; 1119 } else { 1120 in_out_vrr->fixed.fixed_active = true; 1121 in_out_vrr->adjust.v_total_min = 1122 mod_freesync_calc_v_total_from_refresh(stream, 1123 in_out_vrr->fixed.target_refresh_in_uhz); 1124 in_out_vrr->adjust.v_total_max = 1125 in_out_vrr->adjust.v_total_min; 1126 } 1127 } else { 1128 in_out_vrr->state = VRR_STATE_INACTIVE; 1129 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1130 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1131 } 1132 } 1133 1134 void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync, 1135 const struct dc_plane_state *plane, 1136 const struct dc_stream_state *stream, 1137 unsigned int curr_time_stamp_in_us, 1138 struct mod_vrr_params *in_out_vrr) 1139 { 1140 struct core_freesync *core_freesync = NULL; 1141 unsigned int last_render_time_in_us = 0; 1142 1143 if (mod_freesync == NULL) 1144 return; 1145 1146 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1147 1148 if (in_out_vrr->supported && 1149 in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) { 1150 1151 last_render_time_in_us = curr_time_stamp_in_us - 1152 plane->time.prev_update_time_in_us; 1153 1154 if (in_out_vrr->btr.btr_enabled) { 1155 apply_below_the_range(core_freesync, 1156 stream, 1157 last_render_time_in_us, 1158 in_out_vrr); 1159 } else { 1160 apply_fixed_refresh(core_freesync, 1161 stream, 1162 last_render_time_in_us, 1163 in_out_vrr); 1164 } 1165 1166 determine_flip_interval_workaround_req(in_out_vrr, 1167 curr_time_stamp_in_us); 1168 1169 } 1170 } 1171 1172 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync, 1173 const struct dc_stream_state *stream, 1174 struct mod_vrr_params *in_out_vrr) 1175 { 1176 struct core_freesync *core_freesync = NULL; 1177 unsigned int cur_timestamp_in_us; 1178 unsigned long long cur_tick; 1179 1180 if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL)) 1181 return; 1182 1183 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1184 1185 if (in_out_vrr->supported == false) 1186 return; 1187 1188 cur_tick = dm_get_timestamp(core_freesync->dc->ctx); 1189 cur_timestamp_in_us = (unsigned int) 1190 div_u64(dm_get_elapse_time_in_ns(core_freesync->dc->ctx, cur_tick, 0), 1000); 1191 1192 in_out_vrr->flip_interval.vsyncs_between_flip++; 1193 in_out_vrr->flip_interval.v_update_timestamp_in_us = cur_timestamp_in_us; 1194 1195 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1196 (in_out_vrr->flip_interval.flip_interval_workaround_active || 1197 (!in_out_vrr->flip_interval.flip_interval_workaround_active && 1198 in_out_vrr->flip_interval.program_flip_interval_workaround))) { 1199 // set freesync vmin vmax to nominal for workaround 1200 in_out_vrr->adjust.v_total_min = 1201 mod_freesync_calc_v_total_from_refresh( 1202 stream, in_out_vrr->max_refresh_in_uhz); 1203 in_out_vrr->adjust.v_total_max = 1204 in_out_vrr->adjust.v_total_min; 1205 in_out_vrr->flip_interval.program_flip_interval_workaround = false; 1206 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = true; 1207 return; 1208 } 1209 1210 if (in_out_vrr->state != VRR_STATE_ACTIVE_VARIABLE && 1211 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup) { 1212 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = false; 1213 in_out_vrr->flip_interval.flip_interval_detect_counter = 0; 1214 in_out_vrr->flip_interval.vsyncs_between_flip = 0; 1215 in_out_vrr->flip_interval.vsync_to_flip_in_us = 0; 1216 } 1217 1218 /* Below the Range Logic */ 1219 1220 /* Only execute if in fullscreen mode */ 1221 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1222 in_out_vrr->btr.btr_active) { 1223 /* TODO: pass in flag for Pre-DCE12 ASIC 1224 * in order for frame variable duration to take affect, 1225 * it needs to be done one VSYNC early, which is at 1226 * frameCounter == 1. 1227 * For DCE12 and newer updates to V_TOTAL_MIN/MAX 1228 * will take affect on current frame 1229 */ 1230 if (in_out_vrr->btr.frames_to_insert == 1231 in_out_vrr->btr.frame_counter) { 1232 in_out_vrr->adjust.v_total_min = 1233 calc_v_total_from_duration(stream, 1234 in_out_vrr, 1235 in_out_vrr->btr.inserted_duration_in_us); 1236 in_out_vrr->adjust.v_total_max = 1237 in_out_vrr->adjust.v_total_min; 1238 } 1239 1240 if (in_out_vrr->btr.frame_counter > 0) 1241 in_out_vrr->btr.frame_counter--; 1242 1243 /* Restore FreeSync */ 1244 if (in_out_vrr->btr.frame_counter == 0) { 1245 in_out_vrr->adjust.v_total_min = 1246 mod_freesync_calc_v_total_from_refresh(stream, 1247 in_out_vrr->max_refresh_in_uhz); 1248 in_out_vrr->adjust.v_total_max = 1249 mod_freesync_calc_v_total_from_refresh(stream, 1250 in_out_vrr->min_refresh_in_uhz); 1251 } 1252 } 1253 1254 /* If in fullscreen freesync mode or in video, do not program 1255 * static screen ramp values 1256 */ 1257 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) 1258 in_out_vrr->fixed.ramping_active = false; 1259 1260 /* Gradual Static Screen Ramping Logic 1261 * Execute if ramp is active and user enabled freesync static screen 1262 */ 1263 if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED && 1264 in_out_vrr->fixed.ramping_active) { 1265 update_v_total_for_static_ramp( 1266 core_freesync, stream, in_out_vrr); 1267 } 1268 } 1269 1270 void mod_freesync_get_settings(struct mod_freesync *mod_freesync, 1271 const struct mod_vrr_params *vrr, 1272 unsigned int *v_total_min, unsigned int *v_total_max, 1273 unsigned int *event_triggers, 1274 unsigned int *window_min, unsigned int *window_max, 1275 unsigned int *lfc_mid_point_in_us, 1276 unsigned int *inserted_frames, 1277 unsigned int *inserted_duration_in_us) 1278 { 1279 if (mod_freesync == NULL) 1280 return; 1281 1282 if (vrr->supported) { 1283 *v_total_min = vrr->adjust.v_total_min; 1284 *v_total_max = vrr->adjust.v_total_max; 1285 *event_triggers = 0; 1286 *lfc_mid_point_in_us = vrr->btr.mid_point_in_us; 1287 *inserted_frames = vrr->btr.frames_to_insert; 1288 *inserted_duration_in_us = vrr->btr.inserted_duration_in_us; 1289 } 1290 } 1291 1292 unsigned long long mod_freesync_calc_nominal_field_rate( 1293 const struct dc_stream_state *stream) 1294 { 1295 unsigned long long nominal_field_rate_in_uhz = 0; 1296 unsigned int total = stream->timing.h_total * stream->timing.v_total; 1297 1298 /* Calculate nominal field rate for stream, rounded up to nearest integer */ 1299 nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz; 1300 nominal_field_rate_in_uhz *= 100000000ULL; 1301 1302 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total); 1303 1304 return nominal_field_rate_in_uhz; 1305 } 1306 1307 unsigned long long mod_freesync_calc_field_rate_from_timing( 1308 unsigned int vtotal, unsigned int htotal, unsigned int pix_clk) 1309 { 1310 unsigned long long field_rate_in_uhz = 0; 1311 unsigned int total = htotal * vtotal; 1312 1313 /* Calculate nominal field rate for stream, rounded up to nearest integer */ 1314 field_rate_in_uhz = pix_clk; 1315 field_rate_in_uhz *= 1000000ULL; 1316 1317 field_rate_in_uhz = div_u64(field_rate_in_uhz, total); 1318 1319 return field_rate_in_uhz; 1320 } 1321 1322 bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr) 1323 { 1324 return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED); 1325 } 1326 1327 bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz, 1328 uint32_t max_refresh_cap_in_uhz, 1329 uint32_t nominal_field_rate_in_uhz) 1330 { 1331 1332 /* Typically nominal refresh calculated can have some fractional part. 1333 * Allow for some rounding error of actual video timing by taking floor 1334 * of caps and request. Round the nominal refresh rate. 1335 * 1336 * Dividing will convert everything to units in Hz although input 1337 * variable name is in uHz! 1338 * 1339 * Also note, this takes care of rounding error on the nominal refresh 1340 * so by rounding error we only expect it to be off by a small amount, 1341 * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx. 1342 * 1343 * Example 1. Caps Min = 40 Hz, Max = 144 Hz 1344 * Request Min = 40 Hz, Max = 144 Hz 1345 * Nominal = 143.5x Hz rounded to 144 Hz 1346 * This function should allow this as valid request 1347 * 1348 * Example 2. Caps Min = 40 Hz, Max = 144 Hz 1349 * Request Min = 40 Hz, Max = 144 Hz 1350 * Nominal = 144.4x Hz rounded to 144 Hz 1351 * This function should allow this as valid request 1352 * 1353 * Example 3. Caps Min = 40 Hz, Max = 144 Hz 1354 * Request Min = 40 Hz, Max = 144 Hz 1355 * Nominal = 120.xx Hz rounded to 120 Hz 1356 * This function should return NOT valid since the requested 1357 * max is greater than current timing's nominal 1358 * 1359 * Example 4. Caps Min = 40 Hz, Max = 120 Hz 1360 * Request Min = 40 Hz, Max = 120 Hz 1361 * Nominal = 144.xx Hz rounded to 144 Hz 1362 * This function should return NOT valid since the nominal 1363 * is greater than the capability's max refresh 1364 */ 1365 nominal_field_rate_in_uhz = 1366 div_u64(nominal_field_rate_in_uhz + 500000, 1000000); 1367 min_refresh_cap_in_uhz /= 1000000; 1368 max_refresh_cap_in_uhz /= 1000000; 1369 1370 /* Check nominal is within range */ 1371 if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz || 1372 nominal_field_rate_in_uhz < min_refresh_cap_in_uhz) 1373 return false; 1374 1375 /* If nominal is less than max, limit the max allowed refresh rate */ 1376 if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz) 1377 max_refresh_cap_in_uhz = nominal_field_rate_in_uhz; 1378 1379 /* Check min is within range */ 1380 if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz) 1381 return false; 1382 1383 /* For variable range, check for at least 10 Hz range */ 1384 if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10) 1385 return false; 1386 1387 return true; 1388 } 1389