2 * Copyright 2016 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include "dm_services.h"
28 #include "mod_freesync.h"
29 #include "core_types.h"
31 #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 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
52 struct core_freesync {
53 struct mod_freesync public;
57 #define MOD_FREESYNC_TO_CORE(mod_freesync)\
58 container_of(mod_freesync, struct core_freesync, public)
60 struct mod_freesync *mod_freesync_create(struct dc *dc)
62 struct core_freesync *core_freesync =
63 kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
65 if (core_freesync == NULL)
66 goto fail_alloc_context;
71 core_freesync->dc = dc;
72 return &core_freesync->public;
81 void mod_freesync_destroy(struct mod_freesync *mod_freesync)
83 struct core_freesync *core_freesync = NULL;
84 if (mod_freesync == NULL)
86 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
90 #if 0 /* Unused currently */
91 static unsigned int calc_refresh_in_uhz_from_duration(
92 unsigned int duration_in_ns)
94 unsigned int refresh_in_uhz =
95 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
97 return refresh_in_uhz;
101 static unsigned int calc_duration_in_us_from_refresh_in_uhz(
102 unsigned int refresh_in_uhz)
104 unsigned int duration_in_us =
105 ((unsigned int)(div64_u64((1000000000ULL * 1000),
107 return duration_in_us;
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)
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));
120 return duration_in_us;
123 unsigned int mod_freesync_calc_v_total_from_refresh(
124 const struct dc_stream_state *stream,
125 unsigned int refresh_in_uhz)
127 unsigned int v_total;
128 unsigned int frame_duration_in_ns;
130 frame_duration_in_ns =
131 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
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);
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;
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)
152 unsigned int v_total = 0;
154 if (duration_in_us < vrr->min_duration_in_us)
155 duration_in_us = vrr->min_duration_in_us;
157 if (duration_in_us > vrr->max_duration_in_us)
158 duration_in_us = vrr->max_duration_in_us;
160 if (dc_is_hdmi_signal(stream->signal)) {
161 uint32_t h_total_up_scaled;
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),
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);
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;
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)
187 unsigned int v_total = 0;
188 unsigned int current_duration_in_us =
189 calc_duration_in_us_from_v_total(
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;
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),
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);
210 /* Adjust frame duration delta based on ratio between current and
211 * standard frame duration (frame duration at 60 Hz refresh rate).
213 unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)(
214 frame_duration_delta) * current_duration_in_us), 16666);
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;
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);
229 /* Going to a lower refresh rate (larger frame duration) */
231 /* Increase frame duration */
232 current_duration_in_us += ramp_rate_interpolated;
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);
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);
248 /* v_total cannot be less than nominal */
249 if (v_total < stream->timing.v_total)
250 v_total = stream->timing.v_total;
252 in_out_vrr->adjust.v_total_min = v_total;
253 in_out_vrr->adjust.v_total_max = v_total;
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)
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;
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;
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;
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;
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 */
302 /* Calculate number of midPoint frames that could fit within
303 * the render time interval - take ceil of this value
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;
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 >
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);
319 /* Calculate number of midPoint frames that could fit within
320 * the render time interval - take floor of this value
322 mid_point_frames_floor = last_render_time_in_us /
323 in_out_vrr->btr.mid_point_in_us;
325 if (mid_point_frames_floor > 0) {
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 >
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);
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
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.
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
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.
357 frames_to_insert = mid_point_frames_ceil;
359 /* If choosing FLOOR results in a frame duration that is
360 * closer to the mid point of the range.
363 frames_to_insert = mid_point_frames_floor;
366 /* Prefer current frame multiplier when BTR is enabled unless it drifts
367 * too far from the midpoint
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;
373 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
374 delta_from_mid_point_in_us_2;
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;
385 /* Either we've calculated the number of frames to insert,
386 * or we need to insert min duration frames
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) ?
394 if (frames_to_insert > 0)
395 inserted_frame_duration_in_us = last_render_time_in_us /
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;
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;
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)
415 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
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;
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++;
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;
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++;
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;
450 in_out_vrr->fixed.frame_counter = 0;
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;
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);
471 static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr,
472 unsigned int curr_time_stamp_in_us)
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;
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;
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
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;
498 /* Reset the flip interval counter if we condition is no longer met */
499 in_vrr->flip_interval.flip_interval_detect_counter = 0;
503 in_vrr->flip_interval.vsyncs_between_flip = 0;
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)
512 if (in_vrr->state != in_config->state) {
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) {
518 } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) {
520 } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) {
527 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
528 const struct dc_stream_state *stream,
532 *vmin = stream->adjust.v_total_min;
533 *vmax = stream->adjust.v_total_max;
538 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
539 struct dc_stream_state *stream,
540 unsigned int *nom_v_pos,
543 struct core_freesync *core_freesync = NULL;
544 struct crtc_position position;
546 if (mod_freesync == NULL)
549 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
551 if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1,
552 &position.vertical_count,
553 &position.nominal_vcount)) {
555 *nom_v_pos = position.nominal_vcount;
556 *v_pos = position.vertical_count;
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)
568 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
569 infopacket->sb[1] = 0x1A;
571 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
572 infopacket->sb[2] = 0x00;
574 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
575 infopacket->sb[3] = 0x00;
581 /* PB6 = [Bits 7:3 = Reserved] */
583 /* PB6 = [Bit 0 = FreeSync Supported] */
584 if (vrr->state != VRR_STATE_UNSUPPORTED)
585 infopacket->sb[6] |= 0x01;
587 /* PB6 = [Bit 1 = FreeSync Enabled] */
588 if (vrr->state != VRR_STATE_DISABLED &&
589 vrr->state != VRR_STATE_UNSUPPORTED)
590 infopacket->sb[6] |= 0x02;
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;
598 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
599 vrr->state == VRR_STATE_ACTIVE_FIXED)
600 infopacket->sb[6] |= 0x04;
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);
609 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
612 /* PB8 = FreeSync Maximum refresh rate (Hz)
613 * Note: We should never go above the field rate of the mode timing set.
615 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
618 static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr,
619 struct dc_info_packet *infopacket)
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;
627 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
628 infopacket->sb[1] = 0x1A;
630 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
631 infopacket->sb[2] = 0x00;
633 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
634 infopacket->sb[3] = 0x00;
640 /* PB6 = [Bits 7:3 = Reserved] */
642 /* PB6 = [Bit 0 = FreeSync Supported] */
643 if (vrr->state != VRR_STATE_UNSUPPORTED)
644 infopacket->sb[6] |= 0x01;
646 /* PB6 = [Bit 1 = FreeSync Enabled] */
647 if (vrr->state != VRR_STATE_DISABLED &&
648 vrr->state != VRR_STATE_UNSUPPORTED)
649 infopacket->sb[6] |= 0x02;
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;
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;
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
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
669 /* PB7 = FreeSync Minimum refresh rate (Hz) */
670 infopacket->sb[7] = min_programmed & 0xFF;
672 /* PB8 = FreeSync Maximum refresh rate (Hz) */
673 infopacket->sb[8] = max_programmed & 0xFF;
675 /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */
676 infopacket->sb[11] = (min_programmed >> 8) & 0x03;
678 /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */
679 infopacket->sb[12] = (max_programmed >> 8) & 0x03;
681 /* PB16 : Reserved bits 7:1, FixedRate bit 0 */
682 infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0;
685 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
686 struct dc_info_packet *infopacket)
688 if (app_tf != TRANSFER_FUNC_UNKNOWN) {
689 infopacket->valid = true;
691 infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active]
693 if (app_tf == TRANSFER_FUNC_GAMMA_22) {
694 infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
699 static void build_vrr_infopacket_header_v1(enum signal_type signal,
700 struct dc_info_packet *infopacket,
701 unsigned int *payload_size)
703 if (dc_is_hdmi_signal(signal)) {
707 /* HB0 = Packet Type = 0x83 (Source Product
708 * Descriptor InfoFrame)
710 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
712 /* HB1 = Version = 0x01 */
713 infopacket->hb1 = 0x01;
715 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
716 infopacket->hb2 = 0x08;
718 *payload_size = 0x08;
720 } else if (dc_is_dp_signal(signal)) {
724 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
725 * when used to associate audio related info packets
727 infopacket->hb0 = 0x00;
729 /* HB1 = Packet Type = 0x83 (Source Product
730 * Descriptor InfoFrame)
732 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
734 /* HB2 = [Bits 7:0 = Least significant eight bits -
735 * For INFOFRAME, the value must be 1Bh]
737 infopacket->hb2 = 0x1B;
739 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1]
740 * [Bits 1:0 = Most significant two bits = 0x00]
742 infopacket->hb3 = 0x04;
744 *payload_size = 0x1B;
748 static void build_vrr_infopacket_header_v2(enum signal_type signal,
749 struct dc_info_packet *infopacket,
750 unsigned int *payload_size)
752 if (dc_is_hdmi_signal(signal)) {
756 /* HB0 = Packet Type = 0x83 (Source Product
757 * Descriptor InfoFrame)
759 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
761 /* HB1 = Version = 0x02 */
762 infopacket->hb1 = 0x02;
764 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
765 infopacket->hb2 = 0x09;
767 *payload_size = 0x09;
768 } else if (dc_is_dp_signal(signal)) {
772 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
773 * when used to associate audio related info packets
775 infopacket->hb0 = 0x00;
777 /* HB1 = Packet Type = 0x83 (Source Product
778 * Descriptor InfoFrame)
780 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
782 /* HB2 = [Bits 7:0 = Least significant eight bits -
783 * For INFOFRAME, the value must be 1Bh]
785 infopacket->hb2 = 0x1B;
787 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
788 * [Bits 1:0 = Most significant two bits = 0x00]
790 infopacket->hb3 = 0x08;
792 *payload_size = 0x1B;
796 static void build_vrr_infopacket_header_v3(enum signal_type signal,
797 struct dc_info_packet *infopacket,
798 unsigned int *payload_size)
800 unsigned char version;
803 if (dc_is_hdmi_signal(signal)) {
807 /* HB0 = Packet Type = 0x83 (Source Product
808 * Descriptor InfoFrame)
810 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
812 /* HB1 = Version = 0x03 */
813 infopacket->hb1 = version;
815 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length] */
816 infopacket->hb2 = 0x10;
818 *payload_size = 0x10;
819 } else if (dc_is_dp_signal(signal)) {
823 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
824 * when used to associate audio related info packets
826 infopacket->hb0 = 0x00;
828 /* HB1 = Packet Type = 0x83 (Source Product
829 * Descriptor InfoFrame)
831 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
833 /* HB2 = [Bits 7:0 = Least significant eight bits -
834 * For INFOFRAME, the value must be 1Bh]
836 infopacket->hb2 = 0x1B;
838 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
839 * [Bits 1:0 = Most significant two bits = 0x00]
842 infopacket->hb3 = (version & 0x3F) << 2;
844 *payload_size = 0x1B;
848 static void build_vrr_infopacket_checksum(unsigned int *payload_size,
849 struct dc_info_packet *infopacket)
851 /* Calculate checksum */
852 unsigned int idx = 0;
853 unsigned char checksum = 0;
855 checksum += infopacket->hb0;
856 checksum += infopacket->hb1;
857 checksum += infopacket->hb2;
858 checksum += infopacket->hb3;
860 for (idx = 1; idx <= *payload_size; idx++)
861 checksum += infopacket->sb[idx];
863 /* PB0 = Checksum (one byte complement) */
864 infopacket->sb[0] = (unsigned char)(0x100 - checksum);
866 infopacket->valid = true;
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)
874 /* SPD info packet for FreeSync */
875 unsigned int payload_size = 0;
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);
881 infopacket->valid = true;
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)
890 unsigned int payload_size = 0;
892 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
893 build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop);
895 build_vrr_infopacket_fs2_data(app_tf, infopacket);
897 build_vrr_infopacket_checksum(&payload_size, infopacket);
899 infopacket->valid = true;
902 static void build_vrr_infopacket_fast_transport_data(
904 unsigned int ftOutputRate,
905 struct dc_info_packet *infopacket)
907 /* PB9 : bit7 - fast transport Active*/
908 unsigned char activeBit = (ftActive) ? 1 << 7 : 0;
910 infopacket->sb[1] &= ~activeBit; //clear bit
911 infopacket->sb[1] |= activeBit; //set bit
913 /* PB13 : Target Output Pixel Rate [kHz] - bits 7:0 */
914 infopacket->sb[13] = ftOutputRate & 0xFF;
916 /* PB14 : Target Output Pixel Rate [kHz] - bits 15:8 */
917 infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF;
919 /* PB15 : Target Output Pixel Rate [kHz] - bits 23:16 */
920 infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF;
925 static void build_vrr_infopacket_v3(enum signal_type signal,
926 const struct mod_vrr_params *vrr,
928 bool ftActive, unsigned int ftOutputRate,
930 enum color_transfer_func app_tf,
931 struct dc_info_packet *infopacket)
933 unsigned int payload_size = 0;
935 build_vrr_infopacket_header_v3(signal, infopacket, &payload_size);
936 build_vrr_infopacket_data_v3(vrr, infopacket);
938 build_vrr_infopacket_fs2_data(app_tf, infopacket);
941 build_vrr_infopacket_fast_transport_data(
947 build_vrr_infopacket_checksum(&payload_size, infopacket);
949 infopacket->valid = true;
952 static void build_vrr_infopacket_sdp_v1_3(enum vrr_packet_type packet_type,
953 struct dc_info_packet *infopacket)
955 uint8_t idx = 0, size = 0;
957 size = ((packet_type == PACKET_TYPE_FS_V1) ? 0x08 :
958 (packet_type == PACKET_TYPE_FS_V3) ? 0x10 :
961 for (idx = infopacket->hb2; idx > 1; idx--) // Data Byte Count: 0x1B
962 infopacket->sb[idx] = infopacket->sb[idx-1];
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;
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,
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
983 if (!vrr->send_info_frame)
986 switch (packet_type) {
987 case PACKET_TYPE_FS_V3:
989 // always populate with pixel rate.
990 build_vrr_infopacket_v3(
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,
998 build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket);
1001 case PACKET_TYPE_FS_V2:
1002 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop);
1004 case PACKET_TYPE_VRR:
1005 case PACKET_TYPE_FS_V1:
1007 build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop);
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);
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)
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;
1029 if (mod_freesync == NULL)
1032 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1034 /* Calculate nominal field rate for stream */
1035 nominal_field_rate_in_uhz =
1036 mod_freesync_calc_nominal_field_rate(stream);
1038 min_refresh_in_uhz = in_config->min_refresh_in_uhz;
1039 max_refresh_in_uhz = in_config->max_refresh_in_uhz;
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;
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;
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);
1056 if (!vrr_settings_require_update(core_freesync,
1057 in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz,
1061 in_out_vrr->state = in_config->state;
1062 in_out_vrr->send_info_frame = in_config->vsif_supported;
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;
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);
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);
1083 if (in_config->state == VRR_STATE_ACTIVE_FIXED)
1084 in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz;
1086 in_out_vrr->fixed_refresh_in_uhz = 0;
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);
1091 in_out_vrr->supported = true;
1094 in_out_vrr->fixed.ramping_active = in_config->ramping;
1096 in_out_vrr->btr.btr_enabled = in_config->btr;
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;
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;
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;
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;
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) {
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.
1144 in_out_vrr->fixed.fixed_active = true;
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;
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;
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)
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;
1170 if (mod_freesync == NULL)
1173 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1175 if (in_out_vrr->supported &&
1176 in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
1178 unsigned int oldest_index = plane->time.index + 1;
1180 if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
1183 last_render_time_in_us = curr_time_stamp_in_us -
1184 plane->time.prev_update_time_in_us;
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];
1191 average_render_time_in_us -=
1192 plane->time.time_elapsed_in_us[oldest_index];
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;
1198 if (in_out_vrr->btr.btr_enabled) {
1199 apply_below_the_range(core_freesync,
1201 last_render_time_in_us,
1204 apply_fixed_refresh(core_freesync,
1206 last_render_time_in_us,
1210 determine_flip_interval_workaround_req(in_out_vrr,
1211 curr_time_stamp_in_us);
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)
1220 struct core_freesync *core_freesync = NULL;
1221 unsigned int cur_timestamp_in_us;
1222 unsigned long long cur_tick;
1224 if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL))
1227 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1229 if (in_out_vrr->supported == false)
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);
1236 in_out_vrr->flip_interval.vsyncs_between_flip++;
1237 in_out_vrr->flip_interval.v_update_timestamp_in_us = cur_timestamp_in_us;
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;
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;
1262 /* Below the Range Logic */
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
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,
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;
1284 if (in_out_vrr->btr.frame_counter > 0)
1285 in_out_vrr->btr.frame_counter--;
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);
1298 /* If in fullscreen freesync mode or in video, do not program
1299 * static screen ramp values
1301 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE)
1302 in_out_vrr->fixed.ramping_active = false;
1304 /* Gradual Static Screen Ramping Logic
1305 * Execute if ramp is active and user enabled freesync static screen
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);
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)
1323 if (mod_freesync == NULL)
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;
1336 unsigned long long mod_freesync_calc_nominal_field_rate(
1337 const struct dc_stream_state *stream)
1339 unsigned long long nominal_field_rate_in_uhz = 0;
1340 unsigned int total = stream->timing.h_total * stream->timing.v_total;
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;
1346 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total);
1348 return nominal_field_rate_in_uhz;
1351 unsigned long long mod_freesync_calc_field_rate_from_timing(
1352 unsigned int vtotal, unsigned int htotal, unsigned int pix_clk)
1354 unsigned long long field_rate_in_uhz = 0;
1355 unsigned int total = htotal * vtotal;
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;
1361 field_rate_in_uhz = div_u64(field_rate_in_uhz, total);
1363 return field_rate_in_uhz;
1366 bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr)
1368 return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED);
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)
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.
1380 * Dividing will convert everything to units in Hz although input
1381 * variable name is in uHz!
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.
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
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
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
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
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;
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)
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;
1423 /* Check min is within range */
1424 if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz)
1427 /* For variable range, check for at least 10 Hz range */
1428 if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10)