1 /*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #include <linux/slab.h>
27
28 #include "dm_services.h"
29 #include "dc.h"
30 #include "mod_freesync.h"
31 #include "core_types.h"
32
33 #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 32
34
35 #define MIN_REFRESH_RANGE 10
36 /* Refresh rate ramp at a fixed rate of 65 Hz/second */
37 #define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65)
38 /* Number of elements in the render times cache array */
39 #define RENDER_TIMES_MAX_COUNT 10
40 /* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */
41 #define BTR_MAX_MARGIN 2500
42 /* Threshold to change BTR multiplier (to avoid frequent changes) */
43 #define BTR_DRIFT_MARGIN 2000
44 /*Threshold to exit fixed refresh rate*/
45 #define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 4
46 /* Number of consecutive frames to check before entering/exiting fixed refresh*/
47 #define FIXED_REFRESH_ENTER_FRAME_COUNT 5
48 #define FIXED_REFRESH_EXIT_FRAME_COUNT 5
49
50 struct core_freesync {
51 struct mod_freesync public;
52 struct dc *dc;
53 };
54
55 #define MOD_FREESYNC_TO_CORE(mod_freesync)\
56 container_of(mod_freesync, struct core_freesync, public)
57
mod_freesync_create(struct dc * dc)58 struct mod_freesync *mod_freesync_create(struct dc *dc)
59 {
60 struct core_freesync *core_freesync =
61 kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
62
63 if (core_freesync == NULL)
64 goto fail_alloc_context;
65
66 if (dc == NULL)
67 goto fail_construct;
68
69 core_freesync->dc = dc;
70 return &core_freesync->public;
71
72 fail_construct:
73 kfree(core_freesync);
74
75 fail_alloc_context:
76 return NULL;
77 }
78
mod_freesync_destroy(struct mod_freesync * mod_freesync)79 void mod_freesync_destroy(struct mod_freesync *mod_freesync)
80 {
81 struct core_freesync *core_freesync = NULL;
82 if (mod_freesync == NULL)
83 return;
84 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
85 kfree(core_freesync);
86 }
87
88 #if 0 /* unused currently */
89 static unsigned int calc_refresh_in_uhz_from_duration(
90 unsigned int duration_in_ns)
91 {
92 unsigned int refresh_in_uhz =
93 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
94 duration_in_ns)));
95 return refresh_in_uhz;
96 }
97 #endif
98
calc_duration_in_us_from_refresh_in_uhz(unsigned int refresh_in_uhz)99 static unsigned int calc_duration_in_us_from_refresh_in_uhz(
100 unsigned int refresh_in_uhz)
101 {
102 unsigned int duration_in_us =
103 ((unsigned int)(div64_u64((1000000000ULL * 1000),
104 refresh_in_uhz)));
105 return duration_in_us;
106 }
107
calc_duration_in_us_from_v_total(const struct dc_stream_state * stream,const struct mod_vrr_params * in_vrr,unsigned int v_total)108 static unsigned int calc_duration_in_us_from_v_total(
109 const struct dc_stream_state *stream,
110 const struct mod_vrr_params *in_vrr,
111 unsigned int v_total)
112 {
113 unsigned int duration_in_us =
114 (unsigned int)(div64_u64(((unsigned long long)(v_total)
115 * 10000) * stream->timing.h_total,
116 stream->timing.pix_clk_100hz));
117
118 return duration_in_us;
119 }
120
calc_v_total_from_refresh(const struct dc_stream_state * stream,unsigned int refresh_in_uhz)121 static unsigned int calc_v_total_from_refresh(
122 const struct dc_stream_state *stream,
123 unsigned int refresh_in_uhz)
124 {
125 unsigned int v_total;
126 unsigned int frame_duration_in_ns;
127
128 frame_duration_in_ns =
129 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
130 refresh_in_uhz)));
131
132 v_total = div64_u64(div64_u64(((unsigned long long)(
133 frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)),
134 stream->timing.h_total), 1000000);
135
136 /* v_total cannot be less than nominal */
137 if (v_total < stream->timing.v_total) {
138 ASSERT(v_total < stream->timing.v_total);
139 v_total = stream->timing.v_total;
140 }
141
142 return v_total;
143 }
144
calc_v_total_from_duration(const struct dc_stream_state * stream,const struct mod_vrr_params * vrr,unsigned int duration_in_us)145 static unsigned int calc_v_total_from_duration(
146 const struct dc_stream_state *stream,
147 const struct mod_vrr_params *vrr,
148 unsigned int duration_in_us)
149 {
150 unsigned int v_total = 0;
151
152 if (duration_in_us < vrr->min_duration_in_us)
153 duration_in_us = vrr->min_duration_in_us;
154
155 if (duration_in_us > vrr->max_duration_in_us)
156 duration_in_us = vrr->max_duration_in_us;
157
158 v_total = div64_u64(div64_u64(((unsigned long long)(
159 duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
160 stream->timing.h_total), 1000);
161
162 /* v_total cannot be less than nominal */
163 if (v_total < stream->timing.v_total) {
164 ASSERT(v_total < stream->timing.v_total);
165 v_total = stream->timing.v_total;
166 }
167
168 return v_total;
169 }
170
update_v_total_for_static_ramp(struct core_freesync * core_freesync,const struct dc_stream_state * stream,struct mod_vrr_params * in_out_vrr)171 static void update_v_total_for_static_ramp(
172 struct core_freesync *core_freesync,
173 const struct dc_stream_state *stream,
174 struct mod_vrr_params *in_out_vrr)
175 {
176 unsigned int v_total = 0;
177 unsigned int current_duration_in_us =
178 calc_duration_in_us_from_v_total(
179 stream, in_out_vrr,
180 in_out_vrr->adjust.v_total_max);
181 unsigned int target_duration_in_us =
182 calc_duration_in_us_from_refresh_in_uhz(
183 in_out_vrr->fixed.target_refresh_in_uhz);
184 bool ramp_direction_is_up = (current_duration_in_us >
185 target_duration_in_us) ? true : false;
186
187 /* Calc ratio between new and current frame duration with 3 digit */
188 unsigned int frame_duration_ratio = div64_u64(1000000,
189 (1000 + div64_u64(((unsigned long long)(
190 STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) *
191 current_duration_in_us),
192 1000000)));
193
194 /* Calculate delta between new and current frame duration in us */
195 unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
196 current_duration_in_us) *
197 (1000 - frame_duration_ratio)), 1000);
198
199 /* Adjust frame duration delta based on ratio between current and
200 * standard frame duration (frame duration at 60 Hz refresh rate).
201 */
202 unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)(
203 frame_duration_delta) * current_duration_in_us), 16666);
204
205 /* Going to a higher refresh rate (lower frame duration) */
206 if (ramp_direction_is_up) {
207 /* reduce frame duration */
208 current_duration_in_us -= ramp_rate_interpolated;
209
210 /* adjust for frame duration below min */
211 if (current_duration_in_us <= target_duration_in_us) {
212 in_out_vrr->fixed.ramping_active = false;
213 in_out_vrr->fixed.ramping_done = true;
214 current_duration_in_us =
215 calc_duration_in_us_from_refresh_in_uhz(
216 in_out_vrr->fixed.target_refresh_in_uhz);
217 }
218 /* Going to a lower refresh rate (larger frame duration) */
219 } else {
220 /* increase frame duration */
221 current_duration_in_us += ramp_rate_interpolated;
222
223 /* adjust for frame duration above max */
224 if (current_duration_in_us >= target_duration_in_us) {
225 in_out_vrr->fixed.ramping_active = false;
226 in_out_vrr->fixed.ramping_done = true;
227 current_duration_in_us =
228 calc_duration_in_us_from_refresh_in_uhz(
229 in_out_vrr->fixed.target_refresh_in_uhz);
230 }
231 }
232
233 v_total = div64_u64(div64_u64(((unsigned long long)(
234 current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
235 stream->timing.h_total), 1000);
236
237 /* v_total cannot be less than nominal */
238 if (v_total < stream->timing.v_total)
239 v_total = stream->timing.v_total;
240
241 in_out_vrr->adjust.v_total_min = v_total;
242 in_out_vrr->adjust.v_total_max = v_total;
243 }
244
apply_below_the_range(struct core_freesync * core_freesync,const struct dc_stream_state * stream,unsigned int last_render_time_in_us,struct mod_vrr_params * in_out_vrr)245 static void apply_below_the_range(struct core_freesync *core_freesync,
246 const struct dc_stream_state *stream,
247 unsigned int last_render_time_in_us,
248 struct mod_vrr_params *in_out_vrr)
249 {
250 unsigned int inserted_frame_duration_in_us = 0;
251 unsigned int mid_point_frames_ceil = 0;
252 unsigned int mid_point_frames_floor = 0;
253 unsigned int frame_time_in_us = 0;
254 unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF;
255 unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF;
256 unsigned int frames_to_insert = 0;
257 unsigned int delta_from_mid_point_delta_in_us;
258 unsigned int max_render_time_in_us =
259 in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us;
260
261 /* Program BTR */
262 if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) {
263 /* Exit Below the Range */
264 if (in_out_vrr->btr.btr_active) {
265 in_out_vrr->btr.frame_counter = 0;
266 in_out_vrr->btr.btr_active = false;
267 }
268 } else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) {
269 /* Enter Below the Range */
270 if (!in_out_vrr->btr.btr_active) {
271 in_out_vrr->btr.btr_active = true;
272 }
273 }
274
275 /* BTR set to "not active" so disengage */
276 if (!in_out_vrr->btr.btr_active) {
277 in_out_vrr->btr.inserted_duration_in_us = 0;
278 in_out_vrr->btr.frames_to_insert = 0;
279 in_out_vrr->btr.frame_counter = 0;
280
281 /* Restore FreeSync */
282 in_out_vrr->adjust.v_total_min =
283 calc_v_total_from_refresh(stream,
284 in_out_vrr->max_refresh_in_uhz);
285 in_out_vrr->adjust.v_total_max =
286 calc_v_total_from_refresh(stream,
287 in_out_vrr->min_refresh_in_uhz);
288 /* BTR set to "active" so engage */
289 } else {
290
291 /* Calculate number of midPoint frames that could fit within
292 * the render time interval- take ceil of this value
293 */
294 mid_point_frames_ceil = (last_render_time_in_us +
295 in_out_vrr->btr.mid_point_in_us - 1) /
296 in_out_vrr->btr.mid_point_in_us;
297
298 if (mid_point_frames_ceil > 0) {
299 frame_time_in_us = last_render_time_in_us /
300 mid_point_frames_ceil;
301 delta_from_mid_point_in_us_1 =
302 (in_out_vrr->btr.mid_point_in_us >
303 frame_time_in_us) ?
304 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
305 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
306 }
307
308 /* Calculate number of midPoint frames that could fit within
309 * the render time interval- take floor of this value
310 */
311 mid_point_frames_floor = last_render_time_in_us /
312 in_out_vrr->btr.mid_point_in_us;
313
314 if (mid_point_frames_floor > 0) {
315
316 frame_time_in_us = last_render_time_in_us /
317 mid_point_frames_floor;
318 delta_from_mid_point_in_us_2 =
319 (in_out_vrr->btr.mid_point_in_us >
320 frame_time_in_us) ?
321 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
322 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
323 }
324
325 /* Choose number of frames to insert based on how close it
326 * can get to the mid point of the variable range.
327 * - Delta for CEIL: delta_from_mid_point_in_us_1
328 * - Delta for FLOOR: delta_from_mid_point_in_us_2
329 */
330 if (mid_point_frames_ceil &&
331 (last_render_time_in_us / mid_point_frames_ceil) <
332 in_out_vrr->min_duration_in_us) {
333 /* Check for out of range.
334 * If using CEIL produces a value that is out of range,
335 * then we are forced to use FLOOR.
336 */
337 frames_to_insert = mid_point_frames_floor;
338 } else if (mid_point_frames_floor < 2) {
339 /* Check if FLOOR would result in non-LFC. In this case
340 * choose to use CEIL
341 */
342 frames_to_insert = mid_point_frames_ceil;
343 } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
344 /* If choosing CEIL results in a frame duration that is
345 * closer to the mid point of the range.
346 * Choose CEIL
347 */
348 frames_to_insert = mid_point_frames_ceil;
349 } else {
350 /* If choosing FLOOR results in a frame duration that is
351 * closer to the mid point of the range.
352 * Choose FLOOR
353 */
354 frames_to_insert = mid_point_frames_floor;
355 }
356
357 /* Prefer current frame multiplier when BTR is enabled unless it drifts
358 * too far from the midpoint
359 */
360 if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
361 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 -
362 delta_from_mid_point_in_us_1;
363 } else {
364 delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
365 delta_from_mid_point_in_us_2;
366 }
367 if (in_out_vrr->btr.frames_to_insert != 0 &&
368 delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) {
369 if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) <
370 max_render_time_in_us) &&
371 ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) >
372 in_out_vrr->min_duration_in_us))
373 frames_to_insert = in_out_vrr->btr.frames_to_insert;
374 }
375
376 /* Either we've calculated the number of frames to insert,
377 * or we need to insert min duration frames
378 */
379 if (frames_to_insert &&
380 (last_render_time_in_us / frames_to_insert) <
381 in_out_vrr->min_duration_in_us){
382 frames_to_insert -= (frames_to_insert > 1) ?
383 1 : 0;
384 }
385
386 if (frames_to_insert > 0)
387 inserted_frame_duration_in_us = last_render_time_in_us /
388 frames_to_insert;
389
390 if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us)
391 inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us;
392
393 /* Cache the calculated variables */
394 in_out_vrr->btr.inserted_duration_in_us =
395 inserted_frame_duration_in_us;
396 in_out_vrr->btr.frames_to_insert = frames_to_insert;
397 in_out_vrr->btr.frame_counter = frames_to_insert;
398 }
399 }
400
apply_fixed_refresh(struct core_freesync * core_freesync,const struct dc_stream_state * stream,unsigned int last_render_time_in_us,struct mod_vrr_params * in_out_vrr)401 static void apply_fixed_refresh(struct core_freesync *core_freesync,
402 const struct dc_stream_state *stream,
403 unsigned int last_render_time_in_us,
404 struct mod_vrr_params *in_out_vrr)
405 {
406 bool update = false;
407 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
408
409 /* Compute the exit refresh rate and exit frame duration */
410 unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us)
411 + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ));
412 unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz;
413
414 if (last_render_time_in_us < exit_frame_duration_in_us) {
415 /* Exit Fixed Refresh mode */
416 if (in_out_vrr->fixed.fixed_active) {
417 in_out_vrr->fixed.frame_counter++;
418
419 if (in_out_vrr->fixed.frame_counter >
420 FIXED_REFRESH_EXIT_FRAME_COUNT) {
421 in_out_vrr->fixed.frame_counter = 0;
422 in_out_vrr->fixed.fixed_active = false;
423 in_out_vrr->fixed.target_refresh_in_uhz = 0;
424 update = true;
425 }
426 }
427 } else if (last_render_time_in_us > max_render_time_in_us) {
428 /* Enter Fixed Refresh mode */
429 if (!in_out_vrr->fixed.fixed_active) {
430 in_out_vrr->fixed.frame_counter++;
431
432 if (in_out_vrr->fixed.frame_counter >
433 FIXED_REFRESH_ENTER_FRAME_COUNT) {
434 in_out_vrr->fixed.frame_counter = 0;
435 in_out_vrr->fixed.fixed_active = true;
436 in_out_vrr->fixed.target_refresh_in_uhz =
437 in_out_vrr->max_refresh_in_uhz;
438 update = true;
439 }
440 }
441 }
442
443 if (update) {
444 if (in_out_vrr->fixed.fixed_active) {
445 in_out_vrr->adjust.v_total_min =
446 calc_v_total_from_refresh(
447 stream, in_out_vrr->max_refresh_in_uhz);
448 in_out_vrr->adjust.v_total_max =
449 in_out_vrr->adjust.v_total_min;
450 } else {
451 in_out_vrr->adjust.v_total_min =
452 calc_v_total_from_refresh(stream,
453 in_out_vrr->max_refresh_in_uhz);
454 in_out_vrr->adjust.v_total_max =
455 calc_v_total_from_refresh(stream,
456 in_out_vrr->min_refresh_in_uhz);
457 }
458 }
459 }
460
vrr_settings_require_update(struct core_freesync * core_freesync,struct mod_freesync_config * in_config,unsigned int min_refresh_in_uhz,unsigned int max_refresh_in_uhz,struct mod_vrr_params * in_vrr)461 static bool vrr_settings_require_update(struct core_freesync *core_freesync,
462 struct mod_freesync_config *in_config,
463 unsigned int min_refresh_in_uhz,
464 unsigned int max_refresh_in_uhz,
465 struct mod_vrr_params *in_vrr)
466 {
467 if (in_vrr->state != in_config->state) {
468 return true;
469 } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED &&
470 in_vrr->fixed.target_refresh_in_uhz !=
471 in_config->fixed_refresh_in_uhz) {
472 return true;
473 } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) {
474 return true;
475 } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) {
476 return true;
477 }
478
479 return false;
480 }
481
mod_freesync_get_vmin_vmax(struct mod_freesync * mod_freesync,const struct dc_stream_state * stream,unsigned int * vmin,unsigned int * vmax)482 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
483 const struct dc_stream_state *stream,
484 unsigned int *vmin,
485 unsigned int *vmax)
486 {
487 *vmin = stream->adjust.v_total_min;
488 *vmax = stream->adjust.v_total_max;
489
490 return true;
491 }
492
mod_freesync_get_v_position(struct mod_freesync * mod_freesync,struct dc_stream_state * stream,unsigned int * nom_v_pos,unsigned int * v_pos)493 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
494 struct dc_stream_state *stream,
495 unsigned int *nom_v_pos,
496 unsigned int *v_pos)
497 {
498 struct core_freesync *core_freesync = NULL;
499 struct crtc_position position;
500
501 if (mod_freesync == NULL)
502 return false;
503
504 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
505
506 if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1,
507 &position.vertical_count,
508 &position.nominal_vcount)) {
509
510 *nom_v_pos = position.nominal_vcount;
511 *v_pos = position.vertical_count;
512
513 return true;
514 }
515
516 return false;
517 }
518
build_vrr_infopacket_data_v1(const struct mod_vrr_params * vrr,struct dc_info_packet * infopacket)519 static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr,
520 struct dc_info_packet *infopacket)
521 {
522 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
523 infopacket->sb[1] = 0x1A;
524
525 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
526 infopacket->sb[2] = 0x00;
527
528 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
529 infopacket->sb[3] = 0x00;
530
531 /* PB4 = Reserved */
532
533 /* PB5 = Reserved */
534
535 /* PB6 = [Bits 7:3 = Reserved] */
536
537 /* PB6 = [Bit 0 = FreeSync Supported] */
538 if (vrr->state != VRR_STATE_UNSUPPORTED)
539 infopacket->sb[6] |= 0x01;
540
541 /* PB6 = [Bit 1 = FreeSync Enabled] */
542 if (vrr->state != VRR_STATE_DISABLED &&
543 vrr->state != VRR_STATE_UNSUPPORTED)
544 infopacket->sb[6] |= 0x02;
545
546 /* PB6 = [Bit 2 = FreeSync Active] */
547 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
548 vrr->state == VRR_STATE_ACTIVE_FIXED)
549 infopacket->sb[6] |= 0x04;
550
551 // For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range
552 /* PB7 = FreeSync Minimum refresh rate (Hz) */
553 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
554 vrr->state == VRR_STATE_ACTIVE_FIXED) {
555 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000);
556 } else {
557 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
558 }
559
560 /* PB8 = FreeSync Maximum refresh rate (Hz)
561 * Note: We should never go above the field rate of the mode timing set.
562 */
563 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
564
565 //FreeSync HDR
566 infopacket->sb[9] = 0;
567 infopacket->sb[10] = 0;
568 }
569
build_vrr_infopacket_data_v3(const struct mod_vrr_params * vrr,struct dc_info_packet * infopacket)570 static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr,
571 struct dc_info_packet *infopacket)
572 {
573 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
574 infopacket->sb[1] = 0x1A;
575
576 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
577 infopacket->sb[2] = 0x00;
578
579 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
580 infopacket->sb[3] = 0x00;
581
582 /* PB4 = Reserved */
583
584 /* PB5 = Reserved */
585
586 /* PB6 = [Bits 7:3 = Reserved] */
587
588 /* PB6 = [Bit 0 = FreeSync Supported] */
589 if (vrr->state != VRR_STATE_UNSUPPORTED)
590 infopacket->sb[6] |= 0x01;
591
592 /* PB6 = [Bit 1 = FreeSync Enabled] */
593 if (vrr->state != VRR_STATE_DISABLED &&
594 vrr->state != VRR_STATE_UNSUPPORTED)
595 infopacket->sb[6] |= 0x02;
596
597 /* PB6 = [Bit 2 = FreeSync Active] */
598 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
599 vrr->state == VRR_STATE_ACTIVE_FIXED)
600 infopacket->sb[6] |= 0x04;
601
602 if (vrr->state == VRR_STATE_ACTIVE_FIXED) {
603 /* PB7 = FreeSync Minimum refresh rate (Hz) */
604 infopacket->sb[7] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000);
605 /* PB8 = FreeSync Maximum refresh rate (Hz) */
606 infopacket->sb[8] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000);
607 } else if (vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
608 /* PB7 = FreeSync Minimum refresh rate (Hz) */
609 infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000);
610 /* PB8 = FreeSync Maximum refresh rate (Hz) */
611 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
612 } else {
613 // Non-fs case, program nominal range
614 /* PB7 = FreeSync Minimum refresh rate (Hz) */
615 infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
616 /* PB8 = FreeSync Maximum refresh rate (Hz) */
617 infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
618 }
619
620 //FreeSync HDR
621 infopacket->sb[9] = 0;
622 infopacket->sb[10] = 0;
623 }
624
build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,struct dc_info_packet * infopacket)625 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
626 struct dc_info_packet *infopacket)
627 {
628 if (app_tf != TRANSFER_FUNC_UNKNOWN) {
629 infopacket->valid = true;
630
631 infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active]
632
633 if (app_tf == TRANSFER_FUNC_GAMMA_22) {
634 infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
635 }
636 }
637 }
638
build_vrr_infopacket_header_v1(enum signal_type signal,struct dc_info_packet * infopacket,unsigned int * payload_size)639 static void build_vrr_infopacket_header_v1(enum signal_type signal,
640 struct dc_info_packet *infopacket,
641 unsigned int *payload_size)
642 {
643 if (dc_is_hdmi_signal(signal)) {
644
645 /* HEADER */
646
647 /* HB0 = Packet Type = 0x83 (Source Product
648 * Descriptor InfoFrame)
649 */
650 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
651
652 /* HB1 = Version = 0x01 */
653 infopacket->hb1 = 0x01;
654
655 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
656 infopacket->hb2 = 0x08;
657
658 *payload_size = 0x08;
659
660 } else if (dc_is_dp_signal(signal)) {
661
662 /* HEADER */
663
664 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
665 * when used to associate audio related info packets
666 */
667 infopacket->hb0 = 0x00;
668
669 /* HB1 = Packet Type = 0x83 (Source Product
670 * Descriptor InfoFrame)
671 */
672 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
673
674 /* HB2 = [Bits 7:0 = Least significant eight bits -
675 * For INFOFRAME, the value must be 1Bh]
676 */
677 infopacket->hb2 = 0x1B;
678
679 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1]
680 * [Bits 1:0 = Most significant two bits = 0x00]
681 */
682 infopacket->hb3 = 0x04;
683
684 *payload_size = 0x1B;
685 }
686 }
687
build_vrr_infopacket_header_v2(enum signal_type signal,struct dc_info_packet * infopacket,unsigned int * payload_size)688 static void build_vrr_infopacket_header_v2(enum signal_type signal,
689 struct dc_info_packet *infopacket,
690 unsigned int *payload_size)
691 {
692 if (dc_is_hdmi_signal(signal)) {
693
694 /* HEADER */
695
696 /* HB0 = Packet Type = 0x83 (Source Product
697 * Descriptor InfoFrame)
698 */
699 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
700
701 /* HB1 = Version = 0x02 */
702 infopacket->hb1 = 0x02;
703
704 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
705 infopacket->hb2 = 0x09;
706
707 *payload_size = 0x0A;
708
709 } else if (dc_is_dp_signal(signal)) {
710
711 /* HEADER */
712
713 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
714 * when used to associate audio related info packets
715 */
716 infopacket->hb0 = 0x00;
717
718 /* HB1 = Packet Type = 0x83 (Source Product
719 * Descriptor InfoFrame)
720 */
721 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
722
723 /* HB2 = [Bits 7:0 = Least significant eight bits -
724 * For INFOFRAME, the value must be 1Bh]
725 */
726 infopacket->hb2 = 0x1B;
727
728 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
729 * [Bits 1:0 = Most significant two bits = 0x00]
730 */
731 infopacket->hb3 = 0x08;
732
733 *payload_size = 0x1B;
734 }
735 }
736
build_vrr_infopacket_checksum(unsigned int * payload_size,struct dc_info_packet * infopacket)737 static void build_vrr_infopacket_checksum(unsigned int *payload_size,
738 struct dc_info_packet *infopacket)
739 {
740 /* Calculate checksum */
741 unsigned int idx = 0;
742 unsigned char checksum = 0;
743
744 checksum += infopacket->hb0;
745 checksum += infopacket->hb1;
746 checksum += infopacket->hb2;
747 checksum += infopacket->hb3;
748
749 for (idx = 1; idx <= *payload_size; idx++)
750 checksum += infopacket->sb[idx];
751
752 /* PB0 = Checksum (one byte complement) */
753 infopacket->sb[0] = (unsigned char)(0x100 - checksum);
754
755 infopacket->valid = true;
756 }
757
build_vrr_infopacket_v1(enum signal_type signal,const struct mod_vrr_params * vrr,struct dc_info_packet * infopacket)758 static void build_vrr_infopacket_v1(enum signal_type signal,
759 const struct mod_vrr_params *vrr,
760 struct dc_info_packet *infopacket)
761 {
762 /* SPD info packet for FreeSync */
763 unsigned int payload_size = 0;
764
765 build_vrr_infopacket_header_v1(signal, infopacket, &payload_size);
766 build_vrr_infopacket_data_v1(vrr, infopacket);
767 build_vrr_infopacket_checksum(&payload_size, infopacket);
768
769 infopacket->valid = true;
770 }
771
build_vrr_infopacket_v2(enum signal_type signal,const struct mod_vrr_params * vrr,enum color_transfer_func app_tf,struct dc_info_packet * infopacket)772 static void build_vrr_infopacket_v2(enum signal_type signal,
773 const struct mod_vrr_params *vrr,
774 enum color_transfer_func app_tf,
775 struct dc_info_packet *infopacket)
776 {
777 unsigned int payload_size = 0;
778
779 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
780 build_vrr_infopacket_data_v1(vrr, infopacket);
781
782 build_vrr_infopacket_fs2_data(app_tf, infopacket);
783
784 build_vrr_infopacket_checksum(&payload_size, infopacket);
785
786 infopacket->valid = true;
787 }
788 #ifndef TRIM_FSFT
build_vrr_infopacket_fast_transport_data(bool ftActive,unsigned int ftOutputRate,struct dc_info_packet * infopacket)789 static void build_vrr_infopacket_fast_transport_data(
790 bool ftActive,
791 unsigned int ftOutputRate,
792 struct dc_info_packet *infopacket)
793 {
794 /* PB9 : bit7 - fast transport Active*/
795 unsigned char activeBit = (ftActive) ? 1 << 7 : 0;
796
797 infopacket->sb[1] &= ~activeBit; //clear bit
798 infopacket->sb[1] |= activeBit; //set bit
799
800 /* PB13 : Target Output Pixel Rate [kHz] - bits 7:0 */
801 infopacket->sb[13] = ftOutputRate & 0xFF;
802
803 /* PB14 : Target Output Pixel Rate [kHz] - bits 15:8 */
804 infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF;
805
806 /* PB15 : Target Output Pixel Rate [kHz] - bits 23:16 */
807 infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF;
808
809 }
810 #endif
811
build_vrr_infopacket_v3(enum signal_type signal,const struct mod_vrr_params * vrr,bool ftActive,unsigned int ftOutputRate,enum color_transfer_func app_tf,struct dc_info_packet * infopacket)812 static void build_vrr_infopacket_v3(enum signal_type signal,
813 const struct mod_vrr_params *vrr,
814 #ifndef TRIM_FSFT
815 bool ftActive, unsigned int ftOutputRate,
816 #endif
817 enum color_transfer_func app_tf,
818 struct dc_info_packet *infopacket)
819 {
820 unsigned int payload_size = 0;
821
822 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
823 build_vrr_infopacket_data_v3(vrr, infopacket);
824
825 build_vrr_infopacket_fs2_data(app_tf, infopacket);
826
827 #ifndef TRIM_FSFT
828 build_vrr_infopacket_fast_transport_data(
829 ftActive,
830 ftOutputRate,
831 infopacket);
832 #endif
833
834 build_vrr_infopacket_checksum(&payload_size, infopacket);
835
836 infopacket->valid = true;
837 }
838
mod_freesync_build_vrr_infopacket(struct mod_freesync * mod_freesync,const struct dc_stream_state * stream,const struct mod_vrr_params * vrr,enum vrr_packet_type packet_type,enum color_transfer_func app_tf,struct dc_info_packet * infopacket)839 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
840 const struct dc_stream_state *stream,
841 const struct mod_vrr_params *vrr,
842 enum vrr_packet_type packet_type,
843 enum color_transfer_func app_tf,
844 struct dc_info_packet *infopacket)
845 {
846 /* SPD info packet for FreeSync
847 * VTEM info packet for HdmiVRR
848 * Check if Freesync is supported. Return if false. If true,
849 * set the corresponding bit in the info packet
850 */
851 if (!vrr->send_info_frame)
852 return;
853
854 switch (packet_type) {
855 case PACKET_TYPE_FS_V3:
856 #ifndef TRIM_FSFT
857 // always populate with pixel rate.
858 build_vrr_infopacket_v3(
859 stream->signal, vrr,
860 stream->timing.flags.FAST_TRANSPORT,
861 (stream->timing.flags.FAST_TRANSPORT) ?
862 stream->timing.fast_transport_output_rate_100hz :
863 stream->timing.pix_clk_100hz,
864 app_tf, infopacket);
865 #else
866 build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket);
867 #endif
868 break;
869 case PACKET_TYPE_FS_V2:
870 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket);
871 break;
872 case PACKET_TYPE_VRR:
873 case PACKET_TYPE_FS_V1:
874 default:
875 build_vrr_infopacket_v1(stream->signal, vrr, infopacket);
876 }
877 }
878
mod_freesync_build_vrr_params(struct mod_freesync * mod_freesync,const struct dc_stream_state * stream,struct mod_freesync_config * in_config,struct mod_vrr_params * in_out_vrr)879 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
880 const struct dc_stream_state *stream,
881 struct mod_freesync_config *in_config,
882 struct mod_vrr_params *in_out_vrr)
883 {
884 struct core_freesync *core_freesync = NULL;
885 unsigned long long nominal_field_rate_in_uhz = 0;
886 unsigned long long rounded_nominal_in_uhz = 0;
887 unsigned int refresh_range = 0;
888 unsigned long long min_refresh_in_uhz = 0;
889 unsigned long long max_refresh_in_uhz = 0;
890
891 if (mod_freesync == NULL)
892 return;
893
894 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
895
896 /* Calculate nominal field rate for stream */
897 nominal_field_rate_in_uhz =
898 mod_freesync_calc_nominal_field_rate(stream);
899
900 min_refresh_in_uhz = in_config->min_refresh_in_uhz;
901 max_refresh_in_uhz = in_config->max_refresh_in_uhz;
902
903 // Full range may be larger than current video timing, so cap at nominal
904 if (max_refresh_in_uhz > nominal_field_rate_in_uhz)
905 max_refresh_in_uhz = nominal_field_rate_in_uhz;
906
907 // Full range may be larger than current video timing, so cap at nominal
908 if (min_refresh_in_uhz > max_refresh_in_uhz)
909 min_refresh_in_uhz = max_refresh_in_uhz;
910
911 // If a monitor reports exactly max refresh of 2x of min, enforce it on nominal
912 rounded_nominal_in_uhz =
913 div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000;
914 if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) &&
915 in_config->max_refresh_in_uhz == rounded_nominal_in_uhz)
916 min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2);
917
918 if (!vrr_settings_require_update(core_freesync,
919 in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz,
920 in_out_vrr))
921 return;
922
923 in_out_vrr->state = in_config->state;
924 in_out_vrr->send_info_frame = in_config->vsif_supported;
925
926 if (in_config->state == VRR_STATE_UNSUPPORTED) {
927 in_out_vrr->state = VRR_STATE_UNSUPPORTED;
928 in_out_vrr->supported = false;
929 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
930 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
931
932 return;
933
934 } else {
935 in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz;
936 in_out_vrr->max_duration_in_us =
937 calc_duration_in_us_from_refresh_in_uhz(
938 (unsigned int)min_refresh_in_uhz);
939
940 in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz;
941 in_out_vrr->min_duration_in_us =
942 calc_duration_in_us_from_refresh_in_uhz(
943 (unsigned int)max_refresh_in_uhz);
944
945 if (in_config->state == VRR_STATE_ACTIVE_FIXED)
946 in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz;
947 else
948 in_out_vrr->fixed_refresh_in_uhz = 0;
949
950 refresh_range = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) -
951 + div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000);
952
953 in_out_vrr->supported = true;
954 }
955
956 in_out_vrr->fixed.ramping_active = in_config->ramping;
957
958 in_out_vrr->btr.btr_enabled = in_config->btr;
959
960 if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz))
961 in_out_vrr->btr.btr_enabled = false;
962 else {
963 in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us -
964 2 * in_out_vrr->min_duration_in_us;
965 if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN)
966 in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN;
967 }
968
969 in_out_vrr->btr.btr_active = false;
970 in_out_vrr->btr.inserted_duration_in_us = 0;
971 in_out_vrr->btr.frames_to_insert = 0;
972 in_out_vrr->btr.frame_counter = 0;
973 in_out_vrr->fixed.fixed_active = false;
974 in_out_vrr->fixed.target_refresh_in_uhz = 0;
975
976 in_out_vrr->btr.mid_point_in_us =
977 (in_out_vrr->min_duration_in_us +
978 in_out_vrr->max_duration_in_us) / 2;
979
980 if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) {
981 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
982 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
983 } else if (in_out_vrr->state == VRR_STATE_DISABLED) {
984 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
985 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
986 } else if (in_out_vrr->state == VRR_STATE_INACTIVE) {
987 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
988 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
989 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
990 refresh_range >= MIN_REFRESH_RANGE) {
991
992 in_out_vrr->adjust.v_total_min =
993 calc_v_total_from_refresh(stream,
994 in_out_vrr->max_refresh_in_uhz);
995 in_out_vrr->adjust.v_total_max =
996 calc_v_total_from_refresh(stream,
997 in_out_vrr->min_refresh_in_uhz);
998 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) {
999 in_out_vrr->fixed.target_refresh_in_uhz =
1000 in_out_vrr->fixed_refresh_in_uhz;
1001 if (in_out_vrr->fixed.ramping_active &&
1002 in_out_vrr->fixed.fixed_active) {
1003 /* Do not update vtotals if ramping is already active
1004 * in order to continue ramp from current refresh.
1005 */
1006 in_out_vrr->fixed.fixed_active = true;
1007 } else {
1008 in_out_vrr->fixed.fixed_active = true;
1009 in_out_vrr->adjust.v_total_min =
1010 calc_v_total_from_refresh(stream,
1011 in_out_vrr->fixed.target_refresh_in_uhz);
1012 in_out_vrr->adjust.v_total_max =
1013 in_out_vrr->adjust.v_total_min;
1014 }
1015 } else {
1016 in_out_vrr->state = VRR_STATE_INACTIVE;
1017 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
1018 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
1019 }
1020 }
1021
mod_freesync_handle_preflip(struct mod_freesync * mod_freesync,const struct dc_plane_state * plane,const struct dc_stream_state * stream,unsigned int curr_time_stamp_in_us,struct mod_vrr_params * in_out_vrr)1022 void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
1023 const struct dc_plane_state *plane,
1024 const struct dc_stream_state *stream,
1025 unsigned int curr_time_stamp_in_us,
1026 struct mod_vrr_params *in_out_vrr)
1027 {
1028 struct core_freesync *core_freesync = NULL;
1029 unsigned int last_render_time_in_us = 0;
1030 unsigned int average_render_time_in_us = 0;
1031
1032 if (mod_freesync == NULL)
1033 return;
1034
1035 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1036
1037 if (in_out_vrr->supported &&
1038 in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
1039 unsigned int i = 0;
1040 unsigned int oldest_index = plane->time.index + 1;
1041
1042 if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
1043 oldest_index = 0;
1044
1045 last_render_time_in_us = curr_time_stamp_in_us -
1046 plane->time.prev_update_time_in_us;
1047
1048 // Sum off all entries except oldest one
1049 for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) {
1050 average_render_time_in_us +=
1051 plane->time.time_elapsed_in_us[i];
1052 }
1053 average_render_time_in_us -=
1054 plane->time.time_elapsed_in_us[oldest_index];
1055
1056 // Add render time for current flip
1057 average_render_time_in_us += last_render_time_in_us;
1058 average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX;
1059
1060 if (in_out_vrr->btr.btr_enabled) {
1061 apply_below_the_range(core_freesync,
1062 stream,
1063 last_render_time_in_us,
1064 in_out_vrr);
1065 } else {
1066 apply_fixed_refresh(core_freesync,
1067 stream,
1068 last_render_time_in_us,
1069 in_out_vrr);
1070 }
1071
1072 }
1073 }
1074
mod_freesync_handle_v_update(struct mod_freesync * mod_freesync,const struct dc_stream_state * stream,struct mod_vrr_params * in_out_vrr)1075 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
1076 const struct dc_stream_state *stream,
1077 struct mod_vrr_params *in_out_vrr)
1078 {
1079 struct core_freesync *core_freesync = NULL;
1080
1081 if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL))
1082 return;
1083
1084 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1085
1086 if (in_out_vrr->supported == false)
1087 return;
1088
1089 /* Below the Range Logic */
1090
1091 /* Only execute if in fullscreen mode */
1092 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
1093 in_out_vrr->btr.btr_active) {
1094 /* TODO: pass in flag for Pre-DCE12 ASIC
1095 * in order for frame variable duration to take affect,
1096 * it needs to be done one VSYNC early, which is at
1097 * frameCounter == 1.
1098 * For DCE12 and newer updates to V_TOTAL_MIN/MAX
1099 * will take affect on current frame
1100 */
1101 if (in_out_vrr->btr.frames_to_insert ==
1102 in_out_vrr->btr.frame_counter) {
1103 in_out_vrr->adjust.v_total_min =
1104 calc_v_total_from_duration(stream,
1105 in_out_vrr,
1106 in_out_vrr->btr.inserted_duration_in_us);
1107 in_out_vrr->adjust.v_total_max =
1108 in_out_vrr->adjust.v_total_min;
1109 }
1110
1111 if (in_out_vrr->btr.frame_counter > 0)
1112 in_out_vrr->btr.frame_counter--;
1113
1114 /* Restore FreeSync */
1115 if (in_out_vrr->btr.frame_counter == 0) {
1116 in_out_vrr->adjust.v_total_min =
1117 calc_v_total_from_refresh(stream,
1118 in_out_vrr->max_refresh_in_uhz);
1119 in_out_vrr->adjust.v_total_max =
1120 calc_v_total_from_refresh(stream,
1121 in_out_vrr->min_refresh_in_uhz);
1122 }
1123 }
1124
1125 /* If in fullscreen freesync mode or in video, do not program
1126 * static screen ramp values
1127 */
1128 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE)
1129 in_out_vrr->fixed.ramping_active = false;
1130
1131 /* Gradual Static Screen Ramping Logic */
1132 /* Execute if ramp is active and user enabled freesync static screen*/
1133 if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED &&
1134 in_out_vrr->fixed.ramping_active) {
1135 update_v_total_for_static_ramp(
1136 core_freesync, stream, in_out_vrr);
1137 }
1138 }
1139
mod_freesync_get_settings(struct mod_freesync * mod_freesync,const struct mod_vrr_params * vrr,unsigned int * v_total_min,unsigned int * v_total_max,unsigned int * event_triggers,unsigned int * window_min,unsigned int * window_max,unsigned int * lfc_mid_point_in_us,unsigned int * inserted_frames,unsigned int * inserted_duration_in_us)1140 void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
1141 const struct mod_vrr_params *vrr,
1142 unsigned int *v_total_min, unsigned int *v_total_max,
1143 unsigned int *event_triggers,
1144 unsigned int *window_min, unsigned int *window_max,
1145 unsigned int *lfc_mid_point_in_us,
1146 unsigned int *inserted_frames,
1147 unsigned int *inserted_duration_in_us)
1148 {
1149 if (mod_freesync == NULL)
1150 return;
1151
1152 if (vrr->supported) {
1153 *v_total_min = vrr->adjust.v_total_min;
1154 *v_total_max = vrr->adjust.v_total_max;
1155 *event_triggers = 0;
1156 *lfc_mid_point_in_us = vrr->btr.mid_point_in_us;
1157 *inserted_frames = vrr->btr.frames_to_insert;
1158 *inserted_duration_in_us = vrr->btr.inserted_duration_in_us;
1159 }
1160 }
1161
mod_freesync_calc_nominal_field_rate(const struct dc_stream_state * stream)1162 unsigned long long mod_freesync_calc_nominal_field_rate(
1163 const struct dc_stream_state *stream)
1164 {
1165 unsigned long long nominal_field_rate_in_uhz = 0;
1166 unsigned int total = stream->timing.h_total * stream->timing.v_total;
1167
1168 /* Calculate nominal field rate for stream, rounded up to nearest integer */
1169 nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz;
1170 nominal_field_rate_in_uhz *= 100000000ULL;
1171
1172 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total);
1173
1174 return nominal_field_rate_in_uhz;
1175 }
1176
mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz,uint32_t max_refresh_cap_in_uhz,uint32_t nominal_field_rate_in_uhz)1177 bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz,
1178 uint32_t max_refresh_cap_in_uhz,
1179 uint32_t nominal_field_rate_in_uhz)
1180 {
1181
1182 /* Typically nominal refresh calculated can have some fractional part.
1183 * Allow for some rounding error of actual video timing by taking floor
1184 * of caps and request. Round the nominal refresh rate.
1185 *
1186 * Dividing will convert everything to units in Hz although input
1187 * variable name is in uHz!
1188 *
1189 * Also note, this takes care of rounding error on the nominal refresh
1190 * so by rounding error we only expect it to be off by a small amount,
1191 * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx.
1192 *
1193 * Example 1. Caps Min = 40 Hz, Max = 144 Hz
1194 * Request Min = 40 Hz, Max = 144 Hz
1195 * Nominal = 143.5x Hz rounded to 144 Hz
1196 * This function should allow this as valid request
1197 *
1198 * Example 2. Caps Min = 40 Hz, Max = 144 Hz
1199 * Request Min = 40 Hz, Max = 144 Hz
1200 * Nominal = 144.4x Hz rounded to 144 Hz
1201 * This function should allow this as valid request
1202 *
1203 * Example 3. Caps Min = 40 Hz, Max = 144 Hz
1204 * Request Min = 40 Hz, Max = 144 Hz
1205 * Nominal = 120.xx Hz rounded to 120 Hz
1206 * This function should return NOT valid since the requested
1207 * max is greater than current timing's nominal
1208 *
1209 * Example 4. Caps Min = 40 Hz, Max = 120 Hz
1210 * Request Min = 40 Hz, Max = 120 Hz
1211 * Nominal = 144.xx Hz rounded to 144 Hz
1212 * This function should return NOT valid since the nominal
1213 * is greater than the capability's max refresh
1214 */
1215 nominal_field_rate_in_uhz =
1216 div_u64(nominal_field_rate_in_uhz + 500000, 1000000);
1217 min_refresh_cap_in_uhz /= 1000000;
1218 max_refresh_cap_in_uhz /= 1000000;
1219
1220 // Check nominal is within range
1221 if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||
1222 nominal_field_rate_in_uhz < min_refresh_cap_in_uhz)
1223 return false;
1224
1225 // If nominal is less than max, limit the max allowed refresh rate
1226 if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz)
1227 max_refresh_cap_in_uhz = nominal_field_rate_in_uhz;
1228
1229 // Check min is within range
1230 if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz)
1231 return false;
1232
1233 // For variable range, check for at least 10 Hz range
1234 if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10)
1235 return false;
1236
1237 return true;
1238 }
1239
1240