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 "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), 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 ((last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) { 342 /* Check for out of range. 343 * If using CEIL produces a value that is out of range, 344 * then we are forced to use FLOOR. 345 */ 346 frames_to_insert = mid_point_frames_floor; 347 } else if (mid_point_frames_floor < 2) { 348 /* Check if FLOOR would result in non-LFC. In this case 349 * choose to use CEIL 350 */ 351 frames_to_insert = mid_point_frames_ceil; 352 } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { 353 /* If choosing CEIL results in a frame duration that is 354 * closer to the mid point of the range. 355 * Choose CEIL 356 */ 357 frames_to_insert = mid_point_frames_ceil; 358 } else { 359 /* If choosing FLOOR results in a frame duration that is 360 * closer to the mid point of the range. 361 * Choose FLOOR 362 */ 363 frames_to_insert = mid_point_frames_floor; 364 } 365 366 /* Prefer current frame multiplier when BTR is enabled unless it drifts 367 * too far from the midpoint 368 */ 369 if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { 370 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 - 371 delta_from_mid_point_in_us_1; 372 } else { 373 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 - 374 delta_from_mid_point_in_us_2; 375 } 376 if (in_out_vrr->btr.frames_to_insert != 0 && 377 delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) { 378 if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) < 379 max_render_time_in_us) && 380 ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) > 381 in_out_vrr->min_duration_in_us)) 382 frames_to_insert = in_out_vrr->btr.frames_to_insert; 383 } 384 385 /* Either we've calculated the number of frames to insert, 386 * or we need to insert min duration frames 387 */ 388 if (last_render_time_in_us / frames_to_insert < 389 in_out_vrr->min_duration_in_us){ 390 frames_to_insert -= (frames_to_insert > 1) ? 391 1 : 0; 392 } 393 394 if (frames_to_insert > 0) 395 inserted_frame_duration_in_us = last_render_time_in_us / 396 frames_to_insert; 397 398 if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us) 399 inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us; 400 401 /* Cache the calculated variables */ 402 in_out_vrr->btr.inserted_duration_in_us = 403 inserted_frame_duration_in_us; 404 in_out_vrr->btr.frames_to_insert = frames_to_insert; 405 in_out_vrr->btr.frame_counter = frames_to_insert; 406 } 407 } 408 409 static void apply_fixed_refresh(struct core_freesync *core_freesync, 410 const struct dc_stream_state *stream, 411 unsigned int last_render_time_in_us, 412 struct mod_vrr_params *in_out_vrr) 413 { 414 bool update = false; 415 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us; 416 417 /* Compute the exit refresh rate and exit frame duration */ 418 unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us) 419 + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ)); 420 unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz; 421 422 if (last_render_time_in_us < exit_frame_duration_in_us) { 423 /* Exit Fixed Refresh mode */ 424 if (in_out_vrr->fixed.fixed_active) { 425 in_out_vrr->fixed.frame_counter++; 426 427 if (in_out_vrr->fixed.frame_counter > 428 FIXED_REFRESH_EXIT_FRAME_COUNT) { 429 in_out_vrr->fixed.frame_counter = 0; 430 in_out_vrr->fixed.fixed_active = false; 431 in_out_vrr->fixed.target_refresh_in_uhz = 0; 432 update = true; 433 } 434 } else 435 in_out_vrr->fixed.frame_counter = 0; 436 } else if (last_render_time_in_us > max_render_time_in_us) { 437 /* Enter Fixed Refresh mode */ 438 if (!in_out_vrr->fixed.fixed_active) { 439 in_out_vrr->fixed.frame_counter++; 440 441 if (in_out_vrr->fixed.frame_counter > 442 FIXED_REFRESH_ENTER_FRAME_COUNT) { 443 in_out_vrr->fixed.frame_counter = 0; 444 in_out_vrr->fixed.fixed_active = true; 445 in_out_vrr->fixed.target_refresh_in_uhz = 446 in_out_vrr->max_refresh_in_uhz; 447 update = true; 448 } 449 } else 450 in_out_vrr->fixed.frame_counter = 0; 451 } 452 453 if (update) { 454 if (in_out_vrr->fixed.fixed_active) { 455 in_out_vrr->adjust.v_total_min = 456 mod_freesync_calc_v_total_from_refresh( 457 stream, in_out_vrr->max_refresh_in_uhz); 458 in_out_vrr->adjust.v_total_max = 459 in_out_vrr->adjust.v_total_min; 460 } else { 461 in_out_vrr->adjust.v_total_min = 462 mod_freesync_calc_v_total_from_refresh(stream, 463 in_out_vrr->max_refresh_in_uhz); 464 in_out_vrr->adjust.v_total_max = 465 mod_freesync_calc_v_total_from_refresh(stream, 466 in_out_vrr->min_refresh_in_uhz); 467 } 468 } 469 } 470 471 static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr, 472 unsigned int curr_time_stamp_in_us) 473 { 474 in_vrr->flip_interval.vsync_to_flip_in_us = curr_time_stamp_in_us - 475 in_vrr->flip_interval.v_update_timestamp_in_us; 476 477 /* Determine conditions for stopping workaround */ 478 if (in_vrr->flip_interval.flip_interval_workaround_active && 479 in_vrr->flip_interval.vsyncs_between_flip < VSYNCS_BETWEEN_FLIP_THRESHOLD && 480 in_vrr->flip_interval.vsync_to_flip_in_us > FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { 481 in_vrr->flip_interval.flip_interval_detect_counter = 0; 482 in_vrr->flip_interval.program_flip_interval_workaround = true; 483 in_vrr->flip_interval.flip_interval_workaround_active = false; 484 } else { 485 /* Determine conditions for starting workaround */ 486 if (in_vrr->flip_interval.vsyncs_between_flip >= VSYNCS_BETWEEN_FLIP_THRESHOLD && 487 in_vrr->flip_interval.vsync_to_flip_in_us < FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { 488 /* Increase flip interval counter we have 2 vsyncs between flips and 489 * vsync to flip interval is less than 500us 490 */ 491 in_vrr->flip_interval.flip_interval_detect_counter++; 492 if (in_vrr->flip_interval.flip_interval_detect_counter > FREESYNC_CONSEC_FLIP_AFTER_VSYNC) { 493 /* Start workaround if we detect 5 consecutive instances of the above case */ 494 in_vrr->flip_interval.program_flip_interval_workaround = true; 495 in_vrr->flip_interval.flip_interval_workaround_active = true; 496 } 497 } else { 498 /* Reset the flip interval counter if we condition is no longer met */ 499 in_vrr->flip_interval.flip_interval_detect_counter = 0; 500 } 501 } 502 503 in_vrr->flip_interval.vsyncs_between_flip = 0; 504 } 505 506 static bool vrr_settings_require_update(struct core_freesync *core_freesync, 507 struct mod_freesync_config *in_config, 508 unsigned int min_refresh_in_uhz, 509 unsigned int max_refresh_in_uhz, 510 struct mod_vrr_params *in_vrr) 511 { 512 if (in_vrr->state != in_config->state) { 513 return true; 514 } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED && 515 in_vrr->fixed.target_refresh_in_uhz != 516 in_config->fixed_refresh_in_uhz) { 517 return true; 518 } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) { 519 return true; 520 } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) { 521 return true; 522 } 523 524 return false; 525 } 526 527 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync, 528 const struct dc_stream_state *stream, 529 unsigned int *vmin, 530 unsigned int *vmax) 531 { 532 *vmin = stream->adjust.v_total_min; 533 *vmax = stream->adjust.v_total_max; 534 535 return true; 536 } 537 538 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync, 539 struct dc_stream_state *stream, 540 unsigned int *nom_v_pos, 541 unsigned int *v_pos) 542 { 543 struct core_freesync *core_freesync = NULL; 544 struct crtc_position position; 545 546 if (mod_freesync == NULL) 547 return false; 548 549 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 550 551 if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1, 552 &position.vertical_count, 553 &position.nominal_vcount)) { 554 555 *nom_v_pos = position.nominal_vcount; 556 *v_pos = position.vertical_count; 557 558 return true; 559 } 560 561 return false; 562 } 563 564 static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr, 565 struct dc_info_packet *infopacket, 566 bool freesync_on_desktop) 567 { 568 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ 569 infopacket->sb[1] = 0x1A; 570 571 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ 572 infopacket->sb[2] = 0x00; 573 574 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ 575 infopacket->sb[3] = 0x00; 576 577 /* PB4 = Reserved */ 578 579 /* PB5 = Reserved */ 580 581 /* PB6 = [Bits 7:3 = Reserved] */ 582 583 /* PB6 = [Bit 0 = FreeSync Supported] */ 584 if (vrr->state != VRR_STATE_UNSUPPORTED) 585 infopacket->sb[6] |= 0x01; 586 587 /* PB6 = [Bit 1 = FreeSync Enabled] */ 588 if (vrr->state != VRR_STATE_DISABLED && 589 vrr->state != VRR_STATE_UNSUPPORTED) 590 infopacket->sb[6] |= 0x02; 591 592 if (freesync_on_desktop) { 593 /* PB6 = [Bit 2 = FreeSync Active] */ 594 if (vrr->state != VRR_STATE_DISABLED && 595 vrr->state != VRR_STATE_UNSUPPORTED) 596 infopacket->sb[6] |= 0x04; 597 } else { 598 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 599 vrr->state == VRR_STATE_ACTIVE_FIXED) 600 infopacket->sb[6] |= 0x04; 601 } 602 603 // For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range 604 /* PB7 = FreeSync Minimum refresh rate (Hz) */ 605 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 606 vrr->state == VRR_STATE_ACTIVE_FIXED) { 607 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000); 608 } else { 609 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); 610 } 611 612 /* PB8 = FreeSync Maximum refresh rate (Hz) 613 * Note: We should never go above the field rate of the mode timing set. 614 */ 615 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); 616 } 617 618 static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, 619 struct dc_info_packet *infopacket) 620 { 621 unsigned int min_refresh; 622 unsigned int max_refresh; 623 unsigned int fixed_refresh; 624 unsigned int min_programmed; 625 unsigned int max_programmed; 626 627 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ 628 infopacket->sb[1] = 0x1A; 629 630 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ 631 infopacket->sb[2] = 0x00; 632 633 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ 634 infopacket->sb[3] = 0x00; 635 636 /* PB4 = Reserved */ 637 638 /* PB5 = Reserved */ 639 640 /* PB6 = [Bits 7:3 = Reserved] */ 641 642 /* PB6 = [Bit 0 = FreeSync Supported] */ 643 if (vrr->state != VRR_STATE_UNSUPPORTED) 644 infopacket->sb[6] |= 0x01; 645 646 /* PB6 = [Bit 1 = FreeSync Enabled] */ 647 if (vrr->state != VRR_STATE_DISABLED && 648 vrr->state != VRR_STATE_UNSUPPORTED) 649 infopacket->sb[6] |= 0x02; 650 651 /* PB6 = [Bit 2 = FreeSync Active] */ 652 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || 653 vrr->state == VRR_STATE_ACTIVE_FIXED) 654 infopacket->sb[6] |= 0x04; 655 656 min_refresh = (vrr->min_refresh_in_uhz + 500000) / 1000000; 657 max_refresh = (vrr->max_refresh_in_uhz + 500000) / 1000000; 658 fixed_refresh = (vrr->fixed_refresh_in_uhz + 500000) / 1000000; 659 660 min_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : 661 (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? min_refresh : 662 (vrr->state == VRR_STATE_INACTIVE) ? min_refresh : 663 max_refresh; // Non-fs case, program nominal range 664 665 max_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : 666 (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? max_refresh : 667 max_refresh;// Non-fs case, program nominal range 668 669 /* PB7 = FreeSync Minimum refresh rate (Hz) */ 670 infopacket->sb[7] = min_programmed & 0xFF; 671 672 /* PB8 = FreeSync Maximum refresh rate (Hz) */ 673 infopacket->sb[8] = max_programmed & 0xFF; 674 675 /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */ 676 infopacket->sb[11] = (min_programmed >> 8) & 0x03; 677 678 /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */ 679 infopacket->sb[12] = (max_programmed >> 8) & 0x03; 680 681 /* PB16 : Reserved bits 7:1, FixedRate bit 0 */ 682 infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0; 683 } 684 685 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf, 686 struct dc_info_packet *infopacket) 687 { 688 if (app_tf != TRANSFER_FUNC_UNKNOWN) { 689 infopacket->valid = true; 690 691 infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active] 692 693 if (app_tf == TRANSFER_FUNC_GAMMA_22) { 694 infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active] 695 } 696 } 697 } 698 699 static void build_vrr_infopacket_header_v1(enum signal_type signal, 700 struct dc_info_packet *infopacket, 701 unsigned int *payload_size) 702 { 703 if (dc_is_hdmi_signal(signal)) { 704 705 /* HEADER */ 706 707 /* HB0 = Packet Type = 0x83 (Source Product 708 * Descriptor InfoFrame) 709 */ 710 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 711 712 /* HB1 = Version = 0x01 */ 713 infopacket->hb1 = 0x01; 714 715 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */ 716 infopacket->hb2 = 0x08; 717 718 *payload_size = 0x08; 719 720 } else if (dc_is_dp_signal(signal)) { 721 722 /* HEADER */ 723 724 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 725 * when used to associate audio related info packets 726 */ 727 infopacket->hb0 = 0x00; 728 729 /* HB1 = Packet Type = 0x83 (Source Product 730 * Descriptor InfoFrame) 731 */ 732 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 733 734 /* HB2 = [Bits 7:0 = Least significant eight bits - 735 * For INFOFRAME, the value must be 1Bh] 736 */ 737 infopacket->hb2 = 0x1B; 738 739 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1] 740 * [Bits 1:0 = Most significant two bits = 0x00] 741 */ 742 infopacket->hb3 = 0x04; 743 744 *payload_size = 0x1B; 745 } 746 } 747 748 static void build_vrr_infopacket_header_v2(enum signal_type signal, 749 struct dc_info_packet *infopacket, 750 unsigned int *payload_size) 751 { 752 if (dc_is_hdmi_signal(signal)) { 753 754 /* HEADER */ 755 756 /* HB0 = Packet Type = 0x83 (Source Product 757 * Descriptor InfoFrame) 758 */ 759 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 760 761 /* HB1 = Version = 0x02 */ 762 infopacket->hb1 = 0x02; 763 764 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */ 765 infopacket->hb2 = 0x09; 766 767 *payload_size = 0x09; 768 } else if (dc_is_dp_signal(signal)) { 769 770 /* HEADER */ 771 772 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 773 * when used to associate audio related info packets 774 */ 775 infopacket->hb0 = 0x00; 776 777 /* HB1 = Packet Type = 0x83 (Source Product 778 * Descriptor InfoFrame) 779 */ 780 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 781 782 /* HB2 = [Bits 7:0 = Least significant eight bits - 783 * For INFOFRAME, the value must be 1Bh] 784 */ 785 infopacket->hb2 = 0x1B; 786 787 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2] 788 * [Bits 1:0 = Most significant two bits = 0x00] 789 */ 790 infopacket->hb3 = 0x08; 791 792 *payload_size = 0x1B; 793 } 794 } 795 796 static void build_vrr_infopacket_header_v3(enum signal_type signal, 797 struct dc_info_packet *infopacket, 798 unsigned int *payload_size) 799 { 800 unsigned char version; 801 802 version = 3; 803 if (dc_is_hdmi_signal(signal)) { 804 805 /* HEADER */ 806 807 /* HB0 = Packet Type = 0x83 (Source Product 808 * Descriptor InfoFrame) 809 */ 810 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; 811 812 /* HB1 = Version = 0x03 */ 813 infopacket->hb1 = version; 814 815 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length] */ 816 infopacket->hb2 = 0x10; 817 818 *payload_size = 0x10; 819 } else if (dc_is_dp_signal(signal)) { 820 821 /* HEADER */ 822 823 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero 824 * when used to associate audio related info packets 825 */ 826 infopacket->hb0 = 0x00; 827 828 /* HB1 = Packet Type = 0x83 (Source Product 829 * Descriptor InfoFrame) 830 */ 831 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; 832 833 /* HB2 = [Bits 7:0 = Least significant eight bits - 834 * For INFOFRAME, the value must be 1Bh] 835 */ 836 infopacket->hb2 = 0x1B; 837 838 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2] 839 * [Bits 1:0 = Most significant two bits = 0x00] 840 */ 841 842 infopacket->hb3 = (version & 0x3F) << 2; 843 844 *payload_size = 0x1B; 845 } 846 } 847 848 static void build_vrr_infopacket_checksum(unsigned int *payload_size, 849 struct dc_info_packet *infopacket) 850 { 851 /* Calculate checksum */ 852 unsigned int idx = 0; 853 unsigned char checksum = 0; 854 855 checksum += infopacket->hb0; 856 checksum += infopacket->hb1; 857 checksum += infopacket->hb2; 858 checksum += infopacket->hb3; 859 860 for (idx = 1; idx <= *payload_size; idx++) 861 checksum += infopacket->sb[idx]; 862 863 /* PB0 = Checksum (one byte complement) */ 864 infopacket->sb[0] = (unsigned char)(0x100 - checksum); 865 866 infopacket->valid = true; 867 } 868 869 static void build_vrr_infopacket_v1(enum signal_type signal, 870 const struct mod_vrr_params *vrr, 871 struct dc_info_packet *infopacket, 872 bool freesync_on_desktop) 873 { 874 /* SPD info packet for FreeSync */ 875 unsigned int payload_size = 0; 876 877 build_vrr_infopacket_header_v1(signal, infopacket, &payload_size); 878 build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop); 879 build_vrr_infopacket_checksum(&payload_size, infopacket); 880 881 infopacket->valid = true; 882 } 883 884 static void build_vrr_infopacket_v2(enum signal_type signal, 885 const struct mod_vrr_params *vrr, 886 enum color_transfer_func app_tf, 887 struct dc_info_packet *infopacket, 888 bool freesync_on_desktop) 889 { 890 unsigned int payload_size = 0; 891 892 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size); 893 build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop); 894 895 build_vrr_infopacket_fs2_data(app_tf, infopacket); 896 897 build_vrr_infopacket_checksum(&payload_size, infopacket); 898 899 infopacket->valid = true; 900 } 901 #ifndef TRIM_FSFT 902 static void build_vrr_infopacket_fast_transport_data( 903 bool ftActive, 904 unsigned int ftOutputRate, 905 struct dc_info_packet *infopacket) 906 { 907 /* PB9 : bit7 - fast transport Active*/ 908 unsigned char activeBit = (ftActive) ? 1 << 7 : 0; 909 910 infopacket->sb[1] &= ~activeBit; //clear bit 911 infopacket->sb[1] |= activeBit; //set bit 912 913 /* PB13 : Target Output Pixel Rate [kHz] - bits 7:0 */ 914 infopacket->sb[13] = ftOutputRate & 0xFF; 915 916 /* PB14 : Target Output Pixel Rate [kHz] - bits 15:8 */ 917 infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF; 918 919 /* PB15 : Target Output Pixel Rate [kHz] - bits 23:16 */ 920 infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF; 921 922 } 923 #endif 924 925 static void build_vrr_infopacket_v3(enum signal_type signal, 926 const struct mod_vrr_params *vrr, 927 #ifndef TRIM_FSFT 928 bool ftActive, unsigned int ftOutputRate, 929 #endif 930 enum color_transfer_func app_tf, 931 struct dc_info_packet *infopacket) 932 { 933 unsigned int payload_size = 0; 934 935 build_vrr_infopacket_header_v3(signal, infopacket, &payload_size); 936 build_vrr_infopacket_data_v3(vrr, infopacket); 937 938 build_vrr_infopacket_fs2_data(app_tf, infopacket); 939 940 #ifndef TRIM_FSFT 941 build_vrr_infopacket_fast_transport_data( 942 ftActive, 943 ftOutputRate, 944 infopacket); 945 #endif 946 947 build_vrr_infopacket_checksum(&payload_size, infopacket); 948 949 infopacket->valid = true; 950 } 951 952 static void build_vrr_infopacket_sdp_v1_3(enum vrr_packet_type packet_type, 953 struct dc_info_packet *infopacket) 954 { 955 uint8_t idx = 0, size = 0; 956 957 size = ((packet_type == PACKET_TYPE_FS_V1) ? 0x08 : 958 (packet_type == PACKET_TYPE_FS_V3) ? 0x10 : 959 0x09); 960 961 for (idx = infopacket->hb2; idx > 1; idx--) // Data Byte Count: 0x1B 962 infopacket->sb[idx] = infopacket->sb[idx-1]; 963 964 infopacket->sb[1] = size; // Length 965 infopacket->sb[0] = (infopacket->hb3 >> 2) & 0x3F;//Version 966 infopacket->hb3 = (0x13 << 2); // Header,SDP 1.3 967 infopacket->hb2 = 0x1D; 968 } 969 970 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync, 971 const struct dc_stream_state *stream, 972 const struct mod_vrr_params *vrr, 973 enum vrr_packet_type packet_type, 974 enum color_transfer_func app_tf, 975 struct dc_info_packet *infopacket, 976 bool pack_sdp_v1_3) 977 { 978 /* SPD info packet for FreeSync 979 * VTEM info packet for HdmiVRR 980 * Check if Freesync is supported. Return if false. If true, 981 * set the corresponding bit in the info packet 982 */ 983 if (!vrr->send_info_frame) 984 return; 985 986 switch (packet_type) { 987 case PACKET_TYPE_FS_V3: 988 #ifndef TRIM_FSFT 989 // always populate with pixel rate. 990 build_vrr_infopacket_v3( 991 stream->signal, vrr, 992 stream->timing.flags.FAST_TRANSPORT, 993 (stream->timing.flags.FAST_TRANSPORT) ? 994 stream->timing.fast_transport_output_rate_100hz : 995 stream->timing.pix_clk_100hz, 996 app_tf, infopacket); 997 #else 998 build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket); 999 #endif 1000 break; 1001 case PACKET_TYPE_FS_V2: 1002 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop); 1003 break; 1004 case PACKET_TYPE_VRR: 1005 case PACKET_TYPE_FS_V1: 1006 default: 1007 build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop); 1008 } 1009 1010 if (true == pack_sdp_v1_3 && 1011 true == dc_is_dp_signal(stream->signal) && 1012 packet_type != PACKET_TYPE_VRR && 1013 packet_type != PACKET_TYPE_VTEM) 1014 build_vrr_infopacket_sdp_v1_3(packet_type, infopacket); 1015 } 1016 1017 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, 1018 const struct dc_stream_state *stream, 1019 struct mod_freesync_config *in_config, 1020 struct mod_vrr_params *in_out_vrr) 1021 { 1022 struct core_freesync *core_freesync = NULL; 1023 unsigned long long nominal_field_rate_in_uhz = 0; 1024 unsigned long long rounded_nominal_in_uhz = 0; 1025 unsigned int refresh_range = 0; 1026 unsigned long long min_refresh_in_uhz = 0; 1027 unsigned long long max_refresh_in_uhz = 0; 1028 1029 if (mod_freesync == NULL) 1030 return; 1031 1032 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1033 1034 /* Calculate nominal field rate for stream */ 1035 nominal_field_rate_in_uhz = 1036 mod_freesync_calc_nominal_field_rate(stream); 1037 1038 min_refresh_in_uhz = in_config->min_refresh_in_uhz; 1039 max_refresh_in_uhz = in_config->max_refresh_in_uhz; 1040 1041 /* Full range may be larger than current video timing, so cap at nominal */ 1042 if (max_refresh_in_uhz > nominal_field_rate_in_uhz) 1043 max_refresh_in_uhz = nominal_field_rate_in_uhz; 1044 1045 /* Full range may be larger than current video timing, so cap at nominal */ 1046 if (min_refresh_in_uhz > max_refresh_in_uhz) 1047 min_refresh_in_uhz = max_refresh_in_uhz; 1048 1049 /* If a monitor reports exactly max refresh of 2x of min, enforce it on nominal */ 1050 rounded_nominal_in_uhz = 1051 div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000; 1052 if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) && 1053 in_config->max_refresh_in_uhz == rounded_nominal_in_uhz) 1054 min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2); 1055 1056 if (!vrr_settings_require_update(core_freesync, 1057 in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz, 1058 in_out_vrr)) 1059 return; 1060 1061 in_out_vrr->state = in_config->state; 1062 in_out_vrr->send_info_frame = in_config->vsif_supported; 1063 1064 if (in_config->state == VRR_STATE_UNSUPPORTED) { 1065 in_out_vrr->state = VRR_STATE_UNSUPPORTED; 1066 in_out_vrr->supported = false; 1067 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1068 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1069 1070 return; 1071 1072 } else { 1073 in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz; 1074 in_out_vrr->max_duration_in_us = 1075 calc_duration_in_us_from_refresh_in_uhz( 1076 (unsigned int)min_refresh_in_uhz); 1077 1078 in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz; 1079 in_out_vrr->min_duration_in_us = 1080 calc_duration_in_us_from_refresh_in_uhz( 1081 (unsigned int)max_refresh_in_uhz); 1082 1083 if (in_config->state == VRR_STATE_ACTIVE_FIXED) 1084 in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz; 1085 else 1086 in_out_vrr->fixed_refresh_in_uhz = 0; 1087 1088 refresh_range = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) - 1089 + div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000); 1090 1091 in_out_vrr->supported = true; 1092 } 1093 1094 in_out_vrr->fixed.ramping_active = in_config->ramping; 1095 1096 in_out_vrr->btr.btr_enabled = in_config->btr; 1097 1098 if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz)) 1099 in_out_vrr->btr.btr_enabled = false; 1100 else { 1101 in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us - 1102 2 * in_out_vrr->min_duration_in_us; 1103 if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN) 1104 in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN; 1105 } 1106 1107 in_out_vrr->btr.btr_active = false; 1108 in_out_vrr->btr.inserted_duration_in_us = 0; 1109 in_out_vrr->btr.frames_to_insert = 0; 1110 in_out_vrr->btr.frame_counter = 0; 1111 in_out_vrr->fixed.fixed_active = false; 1112 in_out_vrr->fixed.target_refresh_in_uhz = 0; 1113 1114 in_out_vrr->btr.mid_point_in_us = 1115 (in_out_vrr->min_duration_in_us + 1116 in_out_vrr->max_duration_in_us) / 2; 1117 1118 if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) { 1119 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1120 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1121 } else if (in_out_vrr->state == VRR_STATE_DISABLED) { 1122 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1123 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1124 } else if (in_out_vrr->state == VRR_STATE_INACTIVE) { 1125 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1126 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1127 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1128 refresh_range >= MIN_REFRESH_RANGE) { 1129 1130 in_out_vrr->adjust.v_total_min = 1131 mod_freesync_calc_v_total_from_refresh(stream, 1132 in_out_vrr->max_refresh_in_uhz); 1133 in_out_vrr->adjust.v_total_max = 1134 mod_freesync_calc_v_total_from_refresh(stream, 1135 in_out_vrr->min_refresh_in_uhz); 1136 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) { 1137 in_out_vrr->fixed.target_refresh_in_uhz = 1138 in_out_vrr->fixed_refresh_in_uhz; 1139 if (in_out_vrr->fixed.ramping_active && 1140 in_out_vrr->fixed.fixed_active) { 1141 /* Do not update vtotals if ramping is already active 1142 * in order to continue ramp from current refresh. 1143 */ 1144 in_out_vrr->fixed.fixed_active = true; 1145 } else { 1146 in_out_vrr->fixed.fixed_active = true; 1147 in_out_vrr->adjust.v_total_min = 1148 mod_freesync_calc_v_total_from_refresh(stream, 1149 in_out_vrr->fixed.target_refresh_in_uhz); 1150 in_out_vrr->adjust.v_total_max = 1151 in_out_vrr->adjust.v_total_min; 1152 } 1153 } else { 1154 in_out_vrr->state = VRR_STATE_INACTIVE; 1155 in_out_vrr->adjust.v_total_min = stream->timing.v_total; 1156 in_out_vrr->adjust.v_total_max = stream->timing.v_total; 1157 } 1158 } 1159 1160 void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync, 1161 const struct dc_plane_state *plane, 1162 const struct dc_stream_state *stream, 1163 unsigned int curr_time_stamp_in_us, 1164 struct mod_vrr_params *in_out_vrr) 1165 { 1166 struct core_freesync *core_freesync = NULL; 1167 unsigned int last_render_time_in_us = 0; 1168 unsigned int average_render_time_in_us = 0; 1169 1170 if (mod_freesync == NULL) 1171 return; 1172 1173 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1174 1175 if (in_out_vrr->supported && 1176 in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) { 1177 unsigned int i = 0; 1178 unsigned int oldest_index = plane->time.index + 1; 1179 1180 if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX) 1181 oldest_index = 0; 1182 1183 last_render_time_in_us = curr_time_stamp_in_us - 1184 plane->time.prev_update_time_in_us; 1185 1186 /* Sum off all entries except oldest one */ 1187 for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) { 1188 average_render_time_in_us += 1189 plane->time.time_elapsed_in_us[i]; 1190 } 1191 average_render_time_in_us -= 1192 plane->time.time_elapsed_in_us[oldest_index]; 1193 1194 /* Add render time for current flip */ 1195 average_render_time_in_us += last_render_time_in_us; 1196 average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX; 1197 1198 if (in_out_vrr->btr.btr_enabled) { 1199 apply_below_the_range(core_freesync, 1200 stream, 1201 last_render_time_in_us, 1202 in_out_vrr); 1203 } else { 1204 apply_fixed_refresh(core_freesync, 1205 stream, 1206 last_render_time_in_us, 1207 in_out_vrr); 1208 } 1209 1210 determine_flip_interval_workaround_req(in_out_vrr, 1211 curr_time_stamp_in_us); 1212 1213 } 1214 } 1215 1216 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync, 1217 const struct dc_stream_state *stream, 1218 struct mod_vrr_params *in_out_vrr) 1219 { 1220 struct core_freesync *core_freesync = NULL; 1221 unsigned int cur_timestamp_in_us; 1222 unsigned long long cur_tick; 1223 1224 if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL)) 1225 return; 1226 1227 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); 1228 1229 if (in_out_vrr->supported == false) 1230 return; 1231 1232 cur_tick = dm_get_timestamp(core_freesync->dc->ctx); 1233 cur_timestamp_in_us = (unsigned int) 1234 div_u64(dm_get_elapse_time_in_ns(core_freesync->dc->ctx, cur_tick, 0), 1000); 1235 1236 in_out_vrr->flip_interval.vsyncs_between_flip++; 1237 in_out_vrr->flip_interval.v_update_timestamp_in_us = cur_timestamp_in_us; 1238 1239 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1240 (in_out_vrr->flip_interval.flip_interval_workaround_active || 1241 (!in_out_vrr->flip_interval.flip_interval_workaround_active && 1242 in_out_vrr->flip_interval.program_flip_interval_workaround))) { 1243 // set freesync vmin vmax to nominal for workaround 1244 in_out_vrr->adjust.v_total_min = 1245 mod_freesync_calc_v_total_from_refresh( 1246 stream, in_out_vrr->max_refresh_in_uhz); 1247 in_out_vrr->adjust.v_total_max = 1248 in_out_vrr->adjust.v_total_min; 1249 in_out_vrr->flip_interval.program_flip_interval_workaround = false; 1250 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = true; 1251 return; 1252 } 1253 1254 if (in_out_vrr->state != VRR_STATE_ACTIVE_VARIABLE && 1255 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup) { 1256 in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = false; 1257 in_out_vrr->flip_interval.flip_interval_detect_counter = 0; 1258 in_out_vrr->flip_interval.vsyncs_between_flip = 0; 1259 in_out_vrr->flip_interval.vsync_to_flip_in_us = 0; 1260 } 1261 1262 /* Below the Range Logic */ 1263 1264 /* Only execute if in fullscreen mode */ 1265 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && 1266 in_out_vrr->btr.btr_active) { 1267 /* TODO: pass in flag for Pre-DCE12 ASIC 1268 * in order for frame variable duration to take affect, 1269 * it needs to be done one VSYNC early, which is at 1270 * frameCounter == 1. 1271 * For DCE12 and newer updates to V_TOTAL_MIN/MAX 1272 * will take affect on current frame 1273 */ 1274 if (in_out_vrr->btr.frames_to_insert == 1275 in_out_vrr->btr.frame_counter) { 1276 in_out_vrr->adjust.v_total_min = 1277 calc_v_total_from_duration(stream, 1278 in_out_vrr, 1279 in_out_vrr->btr.inserted_duration_in_us); 1280 in_out_vrr->adjust.v_total_max = 1281 in_out_vrr->adjust.v_total_min; 1282 } 1283 1284 if (in_out_vrr->btr.frame_counter > 0) 1285 in_out_vrr->btr.frame_counter--; 1286 1287 /* Restore FreeSync */ 1288 if (in_out_vrr->btr.frame_counter == 0) { 1289 in_out_vrr->adjust.v_total_min = 1290 mod_freesync_calc_v_total_from_refresh(stream, 1291 in_out_vrr->max_refresh_in_uhz); 1292 in_out_vrr->adjust.v_total_max = 1293 mod_freesync_calc_v_total_from_refresh(stream, 1294 in_out_vrr->min_refresh_in_uhz); 1295 } 1296 } 1297 1298 /* If in fullscreen freesync mode or in video, do not program 1299 * static screen ramp values 1300 */ 1301 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) 1302 in_out_vrr->fixed.ramping_active = false; 1303 1304 /* Gradual Static Screen Ramping Logic 1305 * Execute if ramp is active and user enabled freesync static screen 1306 */ 1307 if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED && 1308 in_out_vrr->fixed.ramping_active) { 1309 update_v_total_for_static_ramp( 1310 core_freesync, stream, in_out_vrr); 1311 } 1312 } 1313 1314 void mod_freesync_get_settings(struct mod_freesync *mod_freesync, 1315 const struct mod_vrr_params *vrr, 1316 unsigned int *v_total_min, unsigned int *v_total_max, 1317 unsigned int *event_triggers, 1318 unsigned int *window_min, unsigned int *window_max, 1319 unsigned int *lfc_mid_point_in_us, 1320 unsigned int *inserted_frames, 1321 unsigned int *inserted_duration_in_us) 1322 { 1323 if (mod_freesync == NULL) 1324 return; 1325 1326 if (vrr->supported) { 1327 *v_total_min = vrr->adjust.v_total_min; 1328 *v_total_max = vrr->adjust.v_total_max; 1329 *event_triggers = 0; 1330 *lfc_mid_point_in_us = vrr->btr.mid_point_in_us; 1331 *inserted_frames = vrr->btr.frames_to_insert; 1332 *inserted_duration_in_us = vrr->btr.inserted_duration_in_us; 1333 } 1334 } 1335 1336 unsigned long long mod_freesync_calc_nominal_field_rate( 1337 const struct dc_stream_state *stream) 1338 { 1339 unsigned long long nominal_field_rate_in_uhz = 0; 1340 unsigned int total = stream->timing.h_total * stream->timing.v_total; 1341 1342 /* Calculate nominal field rate for stream, rounded up to nearest integer */ 1343 nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz; 1344 nominal_field_rate_in_uhz *= 100000000ULL; 1345 1346 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total); 1347 1348 return nominal_field_rate_in_uhz; 1349 } 1350 1351 unsigned long long mod_freesync_calc_field_rate_from_timing( 1352 unsigned int vtotal, unsigned int htotal, unsigned int pix_clk) 1353 { 1354 unsigned long long field_rate_in_uhz = 0; 1355 unsigned int total = htotal * vtotal; 1356 1357 /* Calculate nominal field rate for stream, rounded up to nearest integer */ 1358 field_rate_in_uhz = pix_clk; 1359 field_rate_in_uhz *= 1000000ULL; 1360 1361 field_rate_in_uhz = div_u64(field_rate_in_uhz, total); 1362 1363 return field_rate_in_uhz; 1364 } 1365 1366 bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr) 1367 { 1368 return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED); 1369 } 1370 1371 bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz, 1372 uint32_t max_refresh_cap_in_uhz, 1373 uint32_t nominal_field_rate_in_uhz) 1374 { 1375 1376 /* Typically nominal refresh calculated can have some fractional part. 1377 * Allow for some rounding error of actual video timing by taking floor 1378 * of caps and request. Round the nominal refresh rate. 1379 * 1380 * Dividing will convert everything to units in Hz although input 1381 * variable name is in uHz! 1382 * 1383 * Also note, this takes care of rounding error on the nominal refresh 1384 * so by rounding error we only expect it to be off by a small amount, 1385 * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx. 1386 * 1387 * Example 1. Caps Min = 40 Hz, Max = 144 Hz 1388 * Request Min = 40 Hz, Max = 144 Hz 1389 * Nominal = 143.5x Hz rounded to 144 Hz 1390 * This function should allow this as valid request 1391 * 1392 * Example 2. Caps Min = 40 Hz, Max = 144 Hz 1393 * Request Min = 40 Hz, Max = 144 Hz 1394 * Nominal = 144.4x Hz rounded to 144 Hz 1395 * This function should allow this as valid request 1396 * 1397 * Example 3. Caps Min = 40 Hz, Max = 144 Hz 1398 * Request Min = 40 Hz, Max = 144 Hz 1399 * Nominal = 120.xx Hz rounded to 120 Hz 1400 * This function should return NOT valid since the requested 1401 * max is greater than current timing's nominal 1402 * 1403 * Example 4. Caps Min = 40 Hz, Max = 120 Hz 1404 * Request Min = 40 Hz, Max = 120 Hz 1405 * Nominal = 144.xx Hz rounded to 144 Hz 1406 * This function should return NOT valid since the nominal 1407 * is greater than the capability's max refresh 1408 */ 1409 nominal_field_rate_in_uhz = 1410 div_u64(nominal_field_rate_in_uhz + 500000, 1000000); 1411 min_refresh_cap_in_uhz /= 1000000; 1412 max_refresh_cap_in_uhz /= 1000000; 1413 1414 /* Check nominal is within range */ 1415 if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz || 1416 nominal_field_rate_in_uhz < min_refresh_cap_in_uhz) 1417 return false; 1418 1419 /* If nominal is less than max, limit the max allowed refresh rate */ 1420 if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz) 1421 max_refresh_cap_in_uhz = nominal_field_rate_in_uhz; 1422 1423 /* Check min is within range */ 1424 if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz) 1425 return false; 1426 1427 /* For variable range, check for at least 10 Hz range */ 1428 if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10) 1429 return false; 1430 1431 return true; 1432 } 1433