]> git.proxmox.com Git - mirror_ubuntu-kernels.git/blob - drivers/gpu/drm/amd/display/modules/freesync/freesync.c
projects / mirror_ubuntu-kernels.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branches 'for-5.1/upstream-fixes', 'for-5.2/core', 'for-5.2/ish', 'for-5.2...
[mirror_ubuntu-kernels.git] / drivers / gpu / drm / amd / display / modules / freesync / freesync.c
1 /*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #include "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_IN_US 10000000
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 BTR (to avoid frequent enter-exits at the lower limit) */
39 #define BTR_EXIT_MARGIN 2000
40 /*Threshold to exit fixed refresh rate*/
41 #define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 4
42 /* Number of consecutive frames to check before entering/exiting fixed refresh*/
43 #define FIXED_REFRESH_ENTER_FRAME_COUNT 5
44 #define FIXED_REFRESH_EXIT_FRAME_COUNT 5
45
46 struct core_freesync {
47 struct mod_freesync public;
48 struct dc *dc;
49 };
50
51 #define MOD_FREESYNC_TO_CORE(mod_freesync)\
52 container_of(mod_freesync, struct core_freesync, public)
53
54 struct mod_freesync *mod_freesync_create(struct dc *dc)
55 {
56 struct core_freesync *core_freesync =
57 kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
58
59 if (core_freesync == NULL)
60 goto fail_alloc_context;
61
62 if (dc == NULL)
63 goto fail_construct;
64
65 core_freesync->dc = dc;
66 return &core_freesync->public;
67
68 fail_construct:
69 kfree(core_freesync);
70
71 fail_alloc_context:
72 return NULL;
73 }
74
75 void mod_freesync_destroy(struct mod_freesync *mod_freesync)
76 {
77 struct core_freesync *core_freesync = NULL;
78 if (mod_freesync == NULL)
79 return;
80 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
81 kfree(core_freesync);
82 }
83
84 #if 0 /* unused currently */
85 static unsigned int calc_refresh_in_uhz_from_duration(
86 unsigned int duration_in_ns)
87 {
88 unsigned int refresh_in_uhz =
89 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
90 duration_in_ns)));
91 return refresh_in_uhz;
92 }
93 #endif
94
95 static unsigned int calc_duration_in_us_from_refresh_in_uhz(
96 unsigned int refresh_in_uhz)
97 {
98 unsigned int duration_in_us =
99 ((unsigned int)(div64_u64((1000000000ULL * 1000),
100 refresh_in_uhz)));
101 return duration_in_us;
102 }
103
104 static unsigned int calc_duration_in_us_from_v_total(
105 const struct dc_stream_state *stream,
106 const struct mod_vrr_params *in_vrr,
107 unsigned int v_total)
108 {
109 unsigned int duration_in_us =
110 (unsigned int)(div64_u64(((unsigned long long)(v_total)
111 * 10000) * stream->timing.h_total,
112 stream->timing.pix_clk_100hz));
113
114 return duration_in_us;
115 }
116
117 static unsigned int calc_v_total_from_refresh(
118 const struct dc_stream_state *stream,
119 unsigned int refresh_in_uhz)
120 {
121 unsigned int v_total = stream->timing.v_total;
122 unsigned int frame_duration_in_ns;
123
124 frame_duration_in_ns =
125 ((unsigned int)(div64_u64((1000000000ULL * 1000000),
126 refresh_in_uhz)));
127
128 v_total = div64_u64(div64_u64(((unsigned long long)(
129 frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)),
130 stream->timing.h_total), 1000000);
131
132 /* v_total cannot be less than nominal */
133 if (v_total < stream->timing.v_total) {
134 ASSERT(v_total < stream->timing.v_total);
135 v_total = stream->timing.v_total;
136 }
137
138 return v_total;
139 }
140
141 static unsigned int calc_v_total_from_duration(
142 const struct dc_stream_state *stream,
143 const struct mod_vrr_params *vrr,
144 unsigned int duration_in_us)
145 {
146 unsigned int v_total = 0;
147
148 if (duration_in_us < vrr->min_duration_in_us)
149 duration_in_us = vrr->min_duration_in_us;
150
151 if (duration_in_us > vrr->max_duration_in_us)
152 duration_in_us = vrr->max_duration_in_us;
153
154 v_total = div64_u64(div64_u64(((unsigned long long)(
155 duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
156 stream->timing.h_total), 1000);
157
158 /* v_total cannot be less than nominal */
159 if (v_total < stream->timing.v_total) {
160 ASSERT(v_total < stream->timing.v_total);
161 v_total = stream->timing.v_total;
162 }
163
164 return v_total;
165 }
166
167 static void update_v_total_for_static_ramp(
168 struct core_freesync *core_freesync,
169 const struct dc_stream_state *stream,
170 struct mod_vrr_params *in_out_vrr)
171 {
172 unsigned int v_total = 0;
173 unsigned int current_duration_in_us =
174 calc_duration_in_us_from_v_total(
175 stream, in_out_vrr,
176 in_out_vrr->adjust.v_total_max);
177 unsigned int target_duration_in_us =
178 calc_duration_in_us_from_refresh_in_uhz(
179 in_out_vrr->fixed.target_refresh_in_uhz);
180 bool ramp_direction_is_up = (current_duration_in_us >
181 target_duration_in_us) ? true : false;
182
183 /* Calc ratio between new and current frame duration with 3 digit */
184 unsigned int frame_duration_ratio = div64_u64(1000000,
185 (1000 + div64_u64(((unsigned long long)(
186 STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) *
187 current_duration_in_us),
188 1000000)));
189
190 /* Calculate delta between new and current frame duration in us */
191 unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
192 current_duration_in_us) *
193 (1000 - frame_duration_ratio)), 1000);
194
195 /* Adjust frame duration delta based on ratio between current and
196 * standard frame duration (frame duration at 60 Hz refresh rate).
197 */
198 unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)(
199 frame_duration_delta) * current_duration_in_us), 16666);
200
201 /* Going to a higher refresh rate (lower frame duration) */
202 if (ramp_direction_is_up) {
203 /* reduce frame duration */
204 current_duration_in_us -= ramp_rate_interpolated;
205
206 /* adjust for frame duration below min */
207 if (current_duration_in_us <= target_duration_in_us) {
208 in_out_vrr->fixed.ramping_active = false;
209 in_out_vrr->fixed.ramping_done = true;
210 current_duration_in_us =
211 calc_duration_in_us_from_refresh_in_uhz(
212 in_out_vrr->fixed.target_refresh_in_uhz);
213 }
214 /* Going to a lower refresh rate (larger frame duration) */
215 } else {
216 /* increase frame duration */
217 current_duration_in_us += ramp_rate_interpolated;
218
219 /* adjust for frame duration above max */
220 if (current_duration_in_us >= target_duration_in_us) {
221 in_out_vrr->fixed.ramping_active = false;
222 in_out_vrr->fixed.ramping_done = true;
223 current_duration_in_us =
224 calc_duration_in_us_from_refresh_in_uhz(
225 in_out_vrr->fixed.target_refresh_in_uhz);
226 }
227 }
228
229 v_total = div64_u64(div64_u64(((unsigned long long)(
230 current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
231 stream->timing.h_total), 1000);
232
233 in_out_vrr->adjust.v_total_min = v_total;
234 in_out_vrr->adjust.v_total_max = v_total;
235 }
236
237 static void apply_below_the_range(struct core_freesync *core_freesync,
238 const struct dc_stream_state *stream,
239 unsigned int last_render_time_in_us,
240 struct mod_vrr_params *in_out_vrr)
241 {
242 unsigned int inserted_frame_duration_in_us = 0;
243 unsigned int mid_point_frames_ceil = 0;
244 unsigned int mid_point_frames_floor = 0;
245 unsigned int frame_time_in_us = 0;
246 unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF;
247 unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF;
248 unsigned int frames_to_insert = 0;
249 unsigned int min_frame_duration_in_ns = 0;
250 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
251
252 min_frame_duration_in_ns = ((unsigned int) (div64_u64(
253 (1000000000ULL * 1000000),
254 in_out_vrr->max_refresh_in_uhz)));
255
256 /* Program BTR */
257 if (last_render_time_in_us + BTR_EXIT_MARGIN < max_render_time_in_us) {
258 /* Exit Below the Range */
259 if (in_out_vrr->btr.btr_active) {
260 in_out_vrr->btr.frame_counter = 0;
261 in_out_vrr->btr.btr_active = false;
262 }
263 } else if (last_render_time_in_us > max_render_time_in_us) {
264 /* Enter Below the Range */
265 in_out_vrr->btr.btr_active = true;
266 }
267
268 /* BTR set to "not active" so disengage */
269 if (!in_out_vrr->btr.btr_active) {
270 in_out_vrr->btr.inserted_duration_in_us = 0;
271 in_out_vrr->btr.frames_to_insert = 0;
272 in_out_vrr->btr.frame_counter = 0;
273
274 /* Restore FreeSync */
275 in_out_vrr->adjust.v_total_min =
276 calc_v_total_from_refresh(stream,
277 in_out_vrr->max_refresh_in_uhz);
278 in_out_vrr->adjust.v_total_max =
279 calc_v_total_from_refresh(stream,
280 in_out_vrr->min_refresh_in_uhz);
281 /* BTR set to "active" so engage */
282 } else {
283
284 /* Calculate number of midPoint frames that could fit within
285 * the render time interval- take ceil of this value
286 */
287 mid_point_frames_ceil = (last_render_time_in_us +
288 in_out_vrr->btr.mid_point_in_us - 1) /
289 in_out_vrr->btr.mid_point_in_us;
290
291 if (mid_point_frames_ceil > 0) {
292 frame_time_in_us = last_render_time_in_us /
293 mid_point_frames_ceil;
294 delta_from_mid_point_in_us_1 =
295 (in_out_vrr->btr.mid_point_in_us >
296 frame_time_in_us) ?
297 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
298 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
299 }
300
301 /* Calculate number of midPoint frames that could fit within
302 * the render time interval- take floor of this value
303 */
304 mid_point_frames_floor = last_render_time_in_us /
305 in_out_vrr->btr.mid_point_in_us;
306
307 if (mid_point_frames_floor > 0) {
308
309 frame_time_in_us = last_render_time_in_us /
310 mid_point_frames_floor;
311 delta_from_mid_point_in_us_2 =
312 (in_out_vrr->btr.mid_point_in_us >
313 frame_time_in_us) ?
314 (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
315 (frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
316 }
317
318 /* Choose number of frames to insert based on how close it
319 * can get to the mid point of the variable range.
320 */
321 if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2)
322 frames_to_insert = mid_point_frames_ceil;
323 else
324 frames_to_insert = mid_point_frames_floor;
325
326 /* Either we've calculated the number of frames to insert,
327 * or we need to insert min duration frames
328 */
329 if (frames_to_insert > 0)
330 inserted_frame_duration_in_us = last_render_time_in_us /
331 frames_to_insert;
332
333 if (inserted_frame_duration_in_us <
334 (1000000 / in_out_vrr->max_refresh_in_uhz))
335 inserted_frame_duration_in_us =
336 (1000000 / in_out_vrr->max_refresh_in_uhz);
337
338 /* Cache the calculated variables */
339 in_out_vrr->btr.inserted_duration_in_us =
340 inserted_frame_duration_in_us;
341 in_out_vrr->btr.frames_to_insert = frames_to_insert;
342 in_out_vrr->btr.frame_counter = frames_to_insert;
343 }
344 }
345
346 static void apply_fixed_refresh(struct core_freesync *core_freesync,
347 const struct dc_stream_state *stream,
348 unsigned int last_render_time_in_us,
349 struct mod_vrr_params *in_out_vrr)
350 {
351 bool update = false;
352 unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
353
354 //Compute the exit refresh rate and exit frame duration
355 unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us)
356 + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ));
357 unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz;
358
359 if (last_render_time_in_us < exit_frame_duration_in_us) {
360 /* Exit Fixed Refresh mode */
361 if (in_out_vrr->fixed.fixed_active) {
362 in_out_vrr->fixed.frame_counter++;
363
364 if (in_out_vrr->fixed.frame_counter >
365 FIXED_REFRESH_EXIT_FRAME_COUNT) {
366 in_out_vrr->fixed.frame_counter = 0;
367 in_out_vrr->fixed.fixed_active = false;
368 in_out_vrr->fixed.target_refresh_in_uhz = 0;
369 update = true;
370 }
371 }
372 } else if (last_render_time_in_us > max_render_time_in_us) {
373 /* Enter Fixed Refresh mode */
374 if (!in_out_vrr->fixed.fixed_active) {
375 in_out_vrr->fixed.frame_counter++;
376
377 if (in_out_vrr->fixed.frame_counter >
378 FIXED_REFRESH_ENTER_FRAME_COUNT) {
379 in_out_vrr->fixed.frame_counter = 0;
380 in_out_vrr->fixed.fixed_active = true;
381 in_out_vrr->fixed.target_refresh_in_uhz =
382 in_out_vrr->max_refresh_in_uhz;
383 update = true;
384 }
385 }
386 }
387
388 if (update) {
389 if (in_out_vrr->fixed.fixed_active) {
390 in_out_vrr->adjust.v_total_min =
391 calc_v_total_from_refresh(
392 stream, in_out_vrr->max_refresh_in_uhz);
393 in_out_vrr->adjust.v_total_max =
394 in_out_vrr->adjust.v_total_min;
395 } else {
396 in_out_vrr->adjust.v_total_min =
397 calc_v_total_from_refresh(stream,
398 in_out_vrr->max_refresh_in_uhz);
399 in_out_vrr->adjust.v_total_max =
400 calc_v_total_from_refresh(stream,
401 in_out_vrr->min_refresh_in_uhz);
402 }
403 }
404 }
405
406 static bool vrr_settings_require_update(struct core_freesync *core_freesync,
407 struct mod_freesync_config *in_config,
408 unsigned int min_refresh_in_uhz,
409 unsigned int max_refresh_in_uhz,
410 struct mod_vrr_params *in_vrr)
411 {
412 if (in_vrr->state != in_config->state) {
413 return true;
414 } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED &&
415 in_vrr->fixed.target_refresh_in_uhz !=
416 in_config->min_refresh_in_uhz) {
417 return true;
418 } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) {
419 return true;
420 } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) {
421 return true;
422 }
423
424 return false;
425 }
426
427 bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
428 const struct dc_stream_state *stream,
429 unsigned int *vmin,
430 unsigned int *vmax)
431 {
432 *vmin = stream->adjust.v_total_min;
433 *vmax = stream->adjust.v_total_max;
434
435 return true;
436 }
437
438 bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
439 struct dc_stream_state *stream,
440 unsigned int *nom_v_pos,
441 unsigned int *v_pos)
442 {
443 struct core_freesync *core_freesync = NULL;
444 struct crtc_position position;
445
446 if (mod_freesync == NULL)
447 return false;
448
449 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
450
451 if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1,
452 &position.vertical_count,
453 &position.nominal_vcount)) {
454
455 *nom_v_pos = position.nominal_vcount;
456 *v_pos = position.vertical_count;
457
458 return true;
459 }
460
461 return false;
462 }
463
464 static void build_vrr_infopacket_header_vtem(enum signal_type signal,
465 struct dc_info_packet *infopacket)
466 {
467 // HEADER
468
469 // HB0, HB1, HB2 indicates PacketType VTEMPacket
470 infopacket->hb0 = 0x7F;
471 infopacket->hb1 = 0xC0;
472 infopacket->hb2 = 0x00;
473 /* HB3 Bit Fields
474 * Reserved :1 = 0
475 * Sync :1 = 0
476 * VFR :1 = 1
477 * Ds_Type :2 = 0
478 * End :1 = 0
479 * New :1 = 0
480 */
481 infopacket->hb3 = 0x20;
482 }
483
484 static void build_vrr_infopacket_header_v1(enum signal_type signal,
485 struct dc_info_packet *infopacket,
486 unsigned int *payload_size)
487 {
488 if (dc_is_hdmi_signal(signal)) {
489
490 /* HEADER */
491
492 /* HB0 = Packet Type = 0x83 (Source Product
493 * Descriptor InfoFrame)
494 */
495 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
496
497 /* HB1 = Version = 0x01 */
498 infopacket->hb1 = 0x01;
499
500 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
501 infopacket->hb2 = 0x08;
502
503 *payload_size = 0x08;
504
505 } else if (dc_is_dp_signal(signal)) {
506
507 /* HEADER */
508
509 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
510 * when used to associate audio related info packets
511 */
512 infopacket->hb0 = 0x00;
513
514 /* HB1 = Packet Type = 0x83 (Source Product
515 * Descriptor InfoFrame)
516 */
517 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
518
519 /* HB2 = [Bits 7:0 = Least significant eight bits -
520 * For INFOFRAME, the value must be 1Bh]
521 */
522 infopacket->hb2 = 0x1B;
523
524 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1]
525 * [Bits 1:0 = Most significant two bits = 0x00]
526 */
527 infopacket->hb3 = 0x04;
528
529 *payload_size = 0x1B;
530 }
531 }
532
533 static void build_vrr_infopacket_header_v2(enum signal_type signal,
534 struct dc_info_packet *infopacket,
535 unsigned int *payload_size)
536 {
537 if (dc_is_hdmi_signal(signal)) {
538
539 /* HEADER */
540
541 /* HB0 = Packet Type = 0x83 (Source Product
542 * Descriptor InfoFrame)
543 */
544 infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
545
546 /* HB1 = Version = 0x02 */
547 infopacket->hb1 = 0x02;
548
549 /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
550 infopacket->hb2 = 0x09;
551
552 *payload_size = 0x0A;
553
554 } else if (dc_is_dp_signal(signal)) {
555
556 /* HEADER */
557
558 /* HB0 = Secondary-data Packet ID = 0 - Only non-zero
559 * when used to associate audio related info packets
560 */
561 infopacket->hb0 = 0x00;
562
563 /* HB1 = Packet Type = 0x83 (Source Product
564 * Descriptor InfoFrame)
565 */
566 infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
567
568 /* HB2 = [Bits 7:0 = Least significant eight bits -
569 * For INFOFRAME, the value must be 1Bh]
570 */
571 infopacket->hb2 = 0x1B;
572
573 /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
574 * [Bits 1:0 = Most significant two bits = 0x00]
575 */
576 infopacket->hb3 = 0x08;
577
578 *payload_size = 0x1B;
579 }
580 }
581
582 static void build_vrr_vtem_infopacket_data(const struct dc_stream_state *stream,
583 const struct mod_vrr_params *vrr,
584 struct dc_info_packet *infopacket)
585 {
586 /* dc_info_packet to VtemPacket Translation of Bit-fields,
587 * SB[6]
588 * unsigned char VRR_EN :1
589 * unsigned char M_CONST :1
590 * unsigned char Reserved2 :2
591 * unsigned char FVA_Factor_M1 :4
592 * SB[7]
593 * unsigned char Base_Vfront :8
594 * SB[8]
595 * unsigned char Base_Refresh_Rate_98 :2
596 * unsigned char RB :1
597 * unsigned char Reserved3 :5
598 * SB[9]
599 * unsigned char Base_RefreshRate_07 :8
600 */
601 unsigned int fieldRateInHz;
602
603 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
604 vrr->state == VRR_STATE_ACTIVE_FIXED){
605 infopacket->sb[6] |= 0x80; //VRR_EN Bit = 1
606 } else {
607 infopacket->sb[6] &= 0x7F; //VRR_EN Bit = 0
608 }
609
610 if (!stream->timing.vic) {
611 infopacket->sb[7] = stream->timing.v_front_porch;
612
613 /* TODO: In dal2, we check mode flags for a reduced blanking timing.
614 * Need a way to relay that information to this function.
615 * if("ReducedBlanking")
616 * {
617 * infopacket->sb[8] |= 0x20; //Set 3rd bit to 1
618 * }
619 */
620 fieldRateInHz = (stream->timing.pix_clk_100hz * 100)/
621 (stream->timing.h_total * stream->timing.v_total);
622
623 infopacket->sb[8] |= ((fieldRateInHz & 0x300) >> 2);
624 infopacket->sb[9] |= fieldRateInHz & 0xFF;
625
626 }
627 infopacket->valid = true;
628 }
629
630 static void build_vrr_infopacket_data(const struct mod_vrr_params *vrr,
631 struct dc_info_packet *infopacket)
632 {
633 /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
634 infopacket->sb[1] = 0x1A;
635
636 /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
637 infopacket->sb[2] = 0x00;
638
639 /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
640 infopacket->sb[3] = 0x00;
641
642 /* PB4 = Reserved */
643
644 /* PB5 = Reserved */
645
646 /* PB6 = [Bits 7:3 = Reserved] */
647
648 /* PB6 = [Bit 0 = FreeSync Supported] */
649 if (vrr->state != VRR_STATE_UNSUPPORTED)
650 infopacket->sb[6] |= 0x01;
651
652 /* PB6 = [Bit 1 = FreeSync Enabled] */
653 if (vrr->state != VRR_STATE_DISABLED &&
654 vrr->state != VRR_STATE_UNSUPPORTED)
655 infopacket->sb[6] |= 0x02;
656
657 /* PB6 = [Bit 2 = FreeSync Active] */
658 if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
659 vrr->state == VRR_STATE_ACTIVE_FIXED)
660 infopacket->sb[6] |= 0x04;
661
662 /* PB7 = FreeSync Minimum refresh rate (Hz) */
663 infopacket->sb[7] = (unsigned char)(vrr->min_refresh_in_uhz / 1000000);
664
665 /* PB8 = FreeSync Maximum refresh rate (Hz)
666 * Note: We should never go above the field rate of the mode timing set.
667 */
668 infopacket->sb[8] = (unsigned char)(vrr->max_refresh_in_uhz / 1000000);
669
670
671 //FreeSync HDR
672 infopacket->sb[9] = 0;
673 infopacket->sb[10] = 0;
674 }
675
676 static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
677 struct dc_info_packet *infopacket)
678 {
679 if (app_tf != TRANSFER_FUNC_UNKNOWN) {
680 infopacket->valid = true;
681
682 infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active]
683
684 if (app_tf == TRANSFER_FUNC_GAMMA_22) {
685 infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
686 }
687 }
688 }
689
690 static void build_vrr_infopacket_checksum(unsigned int *payload_size,
691 struct dc_info_packet *infopacket)
692 {
693 /* Calculate checksum */
694 unsigned int idx = 0;
695 unsigned char checksum = 0;
696
697 checksum += infopacket->hb0;
698 checksum += infopacket->hb1;
699 checksum += infopacket->hb2;
700 checksum += infopacket->hb3;
701
702 for (idx = 1; idx <= *payload_size; idx++)
703 checksum += infopacket->sb[idx];
704
705 /* PB0 = Checksum (one byte complement) */
706 infopacket->sb[0] = (unsigned char)(0x100 - checksum);
707
708 infopacket->valid = true;
709 }
710
711 static void build_vrr_infopacket_v1(enum signal_type signal,
712 const struct mod_vrr_params *vrr,
713 struct dc_info_packet *infopacket)
714 {
715 /* SPD info packet for FreeSync */
716 unsigned int payload_size = 0;
717
718 build_vrr_infopacket_header_v1(signal, infopacket, &payload_size);
719 build_vrr_infopacket_data(vrr, infopacket);
720 build_vrr_infopacket_checksum(&payload_size, infopacket);
721
722 infopacket->valid = true;
723 }
724
725 static void build_vrr_infopacket_v2(enum signal_type signal,
726 const struct mod_vrr_params *vrr,
727 enum color_transfer_func app_tf,
728 struct dc_info_packet *infopacket)
729 {
730 unsigned int payload_size = 0;
731
732 build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
733 build_vrr_infopacket_data(vrr, infopacket);
734
735 build_vrr_infopacket_fs2_data(app_tf, infopacket);
736
737 build_vrr_infopacket_checksum(&payload_size, infopacket);
738
739 infopacket->valid = true;
740 }
741
742 static void build_vrr_infopacket_vtem(const struct dc_stream_state *stream,
743 const struct mod_vrr_params *vrr,
744 struct dc_info_packet *infopacket)
745 {
746 //VTEM info packet for HdmiVrr
747
748 //VTEM Packet is structured differently
749 build_vrr_infopacket_header_vtem(stream->signal, infopacket);
750 build_vrr_vtem_infopacket_data(stream, vrr, infopacket);
751
752 infopacket->valid = true;
753 }
754
755 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
756 const struct dc_stream_state *stream,
757 const struct mod_vrr_params *vrr,
758 enum vrr_packet_type packet_type,
759 enum color_transfer_func app_tf,
760 struct dc_info_packet *infopacket)
761 {
762 /* SPD info packet for FreeSync
763 * VTEM info packet for HdmiVRR
764 * Check if Freesync is supported. Return if false. If true,
765 * set the corresponding bit in the info packet
766 */
767 if (!vrr->supported || (!vrr->send_info_frame && packet_type != PACKET_TYPE_VTEM))
768 return;
769
770 switch (packet_type) {
771 case PACKET_TYPE_FS2:
772 build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket);
773 break;
774 case PACKET_TYPE_VTEM:
775 build_vrr_infopacket_vtem(stream, vrr, infopacket);
776 break;
777 case PACKET_TYPE_VRR:
778 case PACKET_TYPE_FS1:
779 default:
780 build_vrr_infopacket_v1(stream->signal, vrr, infopacket);
781 }
782 }
783
784 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
785 const struct dc_stream_state *stream,
786 struct mod_freesync_config *in_config,
787 struct mod_vrr_params *in_out_vrr)
788 {
789 struct core_freesync *core_freesync = NULL;
790 unsigned long long nominal_field_rate_in_uhz = 0;
791 unsigned int refresh_range = 0;
792 unsigned int min_refresh_in_uhz = 0;
793 unsigned int max_refresh_in_uhz = 0;
794
795 if (mod_freesync == NULL)
796 return;
797
798 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
799
800 /* Calculate nominal field rate for stream */
801 nominal_field_rate_in_uhz =
802 mod_freesync_calc_nominal_field_rate(stream);
803
804 min_refresh_in_uhz = in_config->min_refresh_in_uhz;
805 max_refresh_in_uhz = in_config->max_refresh_in_uhz;
806
807 // Don't allow min > max
808 if (min_refresh_in_uhz > max_refresh_in_uhz)
809 min_refresh_in_uhz = max_refresh_in_uhz;
810
811 // Full range may be larger than current video timing, so cap at nominal
812 if (max_refresh_in_uhz > nominal_field_rate_in_uhz)
813 max_refresh_in_uhz = nominal_field_rate_in_uhz;
814
815 // Full range may be larger than current video timing, so cap at nominal
816 if (min_refresh_in_uhz > nominal_field_rate_in_uhz)
817 min_refresh_in_uhz = nominal_field_rate_in_uhz;
818
819 if (!vrr_settings_require_update(core_freesync,
820 in_config, min_refresh_in_uhz, max_refresh_in_uhz,
821 in_out_vrr))
822 return;
823
824 in_out_vrr->state = in_config->state;
825 in_out_vrr->send_info_frame = in_config->vsif_supported;
826
827 if (in_config->state == VRR_STATE_UNSUPPORTED) {
828 in_out_vrr->state = VRR_STATE_UNSUPPORTED;
829 in_out_vrr->supported = false;
830 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
831 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
832
833 return;
834
835 } else {
836 in_out_vrr->min_refresh_in_uhz = min_refresh_in_uhz;
837 in_out_vrr->max_duration_in_us =
838 calc_duration_in_us_from_refresh_in_uhz(
839 min_refresh_in_uhz);
840
841 in_out_vrr->max_refresh_in_uhz = max_refresh_in_uhz;
842 in_out_vrr->min_duration_in_us =
843 calc_duration_in_us_from_refresh_in_uhz(
844 max_refresh_in_uhz);
845
846 refresh_range = in_out_vrr->max_refresh_in_uhz -
847 in_out_vrr->min_refresh_in_uhz;
848
849 in_out_vrr->supported = true;
850 }
851
852 in_out_vrr->fixed.ramping_active = in_config->ramping;
853
854 in_out_vrr->btr.btr_enabled = in_config->btr;
855 if (in_out_vrr->max_refresh_in_uhz <
856 2 * in_out_vrr->min_refresh_in_uhz)
857 in_out_vrr->btr.btr_enabled = false;
858 in_out_vrr->btr.btr_active = false;
859 in_out_vrr->btr.inserted_duration_in_us = 0;
860 in_out_vrr->btr.frames_to_insert = 0;
861 in_out_vrr->btr.frame_counter = 0;
862 in_out_vrr->btr.mid_point_in_us =
863 in_out_vrr->min_duration_in_us +
864 (in_out_vrr->max_duration_in_us -
865 in_out_vrr->min_duration_in_us) / 2;
866
867 if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) {
868 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
869 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
870 } else if (in_out_vrr->state == VRR_STATE_DISABLED) {
871 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
872 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
873 } else if (in_out_vrr->state == VRR_STATE_INACTIVE) {
874 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
875 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
876 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
877 refresh_range >= MIN_REFRESH_RANGE_IN_US) {
878 in_out_vrr->adjust.v_total_min =
879 calc_v_total_from_refresh(stream,
880 in_out_vrr->max_refresh_in_uhz);
881 in_out_vrr->adjust.v_total_max =
882 calc_v_total_from_refresh(stream,
883 in_out_vrr->min_refresh_in_uhz);
884 } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) {
885 in_out_vrr->fixed.target_refresh_in_uhz =
886 in_out_vrr->min_refresh_in_uhz;
887 if (in_out_vrr->fixed.ramping_active &&
888 in_out_vrr->fixed.fixed_active) {
889 /* Do not update vtotals if ramping is already active
890 * in order to continue ramp from current refresh.
891 */
892 in_out_vrr->fixed.fixed_active = true;
893 } else {
894 in_out_vrr->fixed.fixed_active = true;
895 in_out_vrr->adjust.v_total_min =
896 calc_v_total_from_refresh(stream,
897 in_out_vrr->fixed.target_refresh_in_uhz);
898 in_out_vrr->adjust.v_total_max =
899 in_out_vrr->adjust.v_total_min;
900 }
901 } else {
902 in_out_vrr->state = VRR_STATE_INACTIVE;
903 in_out_vrr->adjust.v_total_min = stream->timing.v_total;
904 in_out_vrr->adjust.v_total_max = stream->timing.v_total;
905 }
906 }
907
908 void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
909 const struct dc_plane_state *plane,
910 const struct dc_stream_state *stream,
911 unsigned int curr_time_stamp_in_us,
912 struct mod_vrr_params *in_out_vrr)
913 {
914 struct core_freesync *core_freesync = NULL;
915 unsigned int last_render_time_in_us = 0;
916 unsigned int average_render_time_in_us = 0;
917
918 if (mod_freesync == NULL)
919 return;
920
921 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
922
923 if (in_out_vrr->supported &&
924 in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
925 unsigned int i = 0;
926 unsigned int oldest_index = plane->time.index + 1;
927
928 if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
929 oldest_index = 0;
930
931 last_render_time_in_us = curr_time_stamp_in_us -
932 plane->time.prev_update_time_in_us;
933
934 // Sum off all entries except oldest one
935 for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) {
936 average_render_time_in_us +=
937 plane->time.time_elapsed_in_us[i];
938 }
939 average_render_time_in_us -=
940 plane->time.time_elapsed_in_us[oldest_index];
941
942 // Add render time for current flip
943 average_render_time_in_us += last_render_time_in_us;
944 average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX;
945
946 if (in_out_vrr->btr.btr_enabled) {
947 apply_below_the_range(core_freesync,
948 stream,
949 last_render_time_in_us,
950 in_out_vrr);
951 } else {
952 apply_fixed_refresh(core_freesync,
953 stream,
954 last_render_time_in_us,
955 in_out_vrr);
956 }
957
958 }
959 }
960
961 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
962 const struct dc_stream_state *stream,
963 struct mod_vrr_params *in_out_vrr)
964 {
965 struct core_freesync *core_freesync = NULL;
966
967 if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL))
968 return;
969
970 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
971
972 if (in_out_vrr->supported == false)
973 return;
974
975 /* Below the Range Logic */
976
977 /* Only execute if in fullscreen mode */
978 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
979 in_out_vrr->btr.btr_active) {
980 /* TODO: pass in flag for Pre-DCE12 ASIC
981 * in order for frame variable duration to take affect,
982 * it needs to be done one VSYNC early, which is at
983 * frameCounter == 1.
984 * For DCE12 and newer updates to V_TOTAL_MIN/MAX
985 * will take affect on current frame
986 */
987 if (in_out_vrr->btr.frames_to_insert ==
988 in_out_vrr->btr.frame_counter) {
989 in_out_vrr->adjust.v_total_min =
990 calc_v_total_from_duration(stream,
991 in_out_vrr,
992 in_out_vrr->btr.inserted_duration_in_us);
993 in_out_vrr->adjust.v_total_max =
994 in_out_vrr->adjust.v_total_min;
995 }
996
997 if (in_out_vrr->btr.frame_counter > 0)
998 in_out_vrr->btr.frame_counter--;
999
1000 /* Restore FreeSync */
1001 if (in_out_vrr->btr.frame_counter == 0) {
1002 in_out_vrr->adjust.v_total_min =
1003 calc_v_total_from_refresh(stream,
1004 in_out_vrr->max_refresh_in_uhz);
1005 in_out_vrr->adjust.v_total_max =
1006 calc_v_total_from_refresh(stream,
1007 in_out_vrr->min_refresh_in_uhz);
1008 }
1009 }
1010
1011 /* If in fullscreen freesync mode or in video, do not program
1012 * static screen ramp values
1013 */
1014 if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE)
1015 in_out_vrr->fixed.ramping_active = false;
1016
1017 /* Gradual Static Screen Ramping Logic */
1018 /* Execute if ramp is active and user enabled freesync static screen*/
1019 if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED &&
1020 in_out_vrr->fixed.ramping_active) {
1021 update_v_total_for_static_ramp(
1022 core_freesync, stream, in_out_vrr);
1023 }
1024 }
1025
1026 void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
1027 const struct mod_vrr_params *vrr,
1028 unsigned int *v_total_min, unsigned int *v_total_max,
1029 unsigned int *event_triggers,
1030 unsigned int *window_min, unsigned int *window_max,
1031 unsigned int *lfc_mid_point_in_us,
1032 unsigned int *inserted_frames,
1033 unsigned int *inserted_duration_in_us)
1034 {
1035 struct core_freesync *core_freesync = NULL;
1036
1037 if (mod_freesync == NULL)
1038 return;
1039
1040 core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
1041
1042 if (vrr->supported) {
1043 *v_total_min = vrr->adjust.v_total_min;
1044 *v_total_max = vrr->adjust.v_total_max;
1045 *event_triggers = 0;
1046 *lfc_mid_point_in_us = vrr->btr.mid_point_in_us;
1047 *inserted_frames = vrr->btr.frames_to_insert;
1048 *inserted_duration_in_us = vrr->btr.inserted_duration_in_us;
1049 }
1050 }
1051
1052 unsigned long long mod_freesync_calc_nominal_field_rate(
1053 const struct dc_stream_state *stream)
1054 {
1055 unsigned long long nominal_field_rate_in_uhz = 0;
1056
1057 /* Calculate nominal field rate for stream */
1058 nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz / 10;
1059 nominal_field_rate_in_uhz *= 1000ULL * 1000ULL * 1000ULL;
1060 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
1061 stream->timing.h_total);
1062 nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
1063 stream->timing.v_total);
1064
1065 return nominal_field_rate_in_uhz;
1066 }
1067
1068 bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
1069 const struct dc_stream_state *stream,
1070 uint32_t min_refresh_cap_in_uhz,
1071 uint32_t max_refresh_cap_in_uhz,
1072 uint32_t min_refresh_request_in_uhz,
1073 uint32_t max_refresh_request_in_uhz)
1074 {
1075 /* Calculate nominal field rate for stream */
1076 unsigned long long nominal_field_rate_in_uhz =
1077 mod_freesync_calc_nominal_field_rate(stream);
1078
1079 /* Typically nominal refresh calculated can have some fractional part.
1080 * Allow for some rounding error of actual video timing by taking floor
1081 * of caps and request. Round the nominal refresh rate.
1082 *
1083 * Dividing will convert everything to units in Hz although input
1084 * variable name is in uHz!
1085 *
1086 * Also note, this takes care of rounding error on the nominal refresh
1087 * so by rounding error we only expect it to be off by a small amount,
1088 * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx.
1089 *
1090 * Example 1. Caps Min = 40 Hz, Max = 144 Hz
1091 * Request Min = 40 Hz, Max = 144 Hz
1092 * Nominal = 143.5x Hz rounded to 144 Hz
1093 * This function should allow this as valid request
1094 *
1095 * Example 2. Caps Min = 40 Hz, Max = 144 Hz
1096 * Request Min = 40 Hz, Max = 144 Hz
1097 * Nominal = 144.4x Hz rounded to 144 Hz
1098 * This function should allow this as valid request
1099 *
1100 * Example 3. Caps Min = 40 Hz, Max = 144 Hz
1101 * Request Min = 40 Hz, Max = 144 Hz
1102 * Nominal = 120.xx Hz rounded to 120 Hz
1103 * This function should return NOT valid since the requested
1104 * max is greater than current timing's nominal
1105 *
1106 * Example 4. Caps Min = 40 Hz, Max = 120 Hz
1107 * Request Min = 40 Hz, Max = 120 Hz
1108 * Nominal = 144.xx Hz rounded to 144 Hz
1109 * This function should return NOT valid since the nominal
1110 * is greater than the capability's max refresh
1111 */
1112 nominal_field_rate_in_uhz =
1113 div_u64(nominal_field_rate_in_uhz + 500000, 1000000);
1114 min_refresh_cap_in_uhz /= 1000000;
1115 max_refresh_cap_in_uhz /= 1000000;
1116 min_refresh_request_in_uhz /= 1000000;
1117 max_refresh_request_in_uhz /= 1000000;
1118
1119 // Check nominal is within range
1120 if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||
1121 nominal_field_rate_in_uhz < min_refresh_cap_in_uhz)
1122 return false;
1123
1124 // If nominal is less than max, limit the max allowed refresh rate
1125 if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz)
1126 max_refresh_cap_in_uhz = nominal_field_rate_in_uhz;
1127
1128 // Don't allow min > max
1129 if (min_refresh_request_in_uhz > max_refresh_request_in_uhz)
1130 return false;
1131
1132 // Check min is within range
1133 if (min_refresh_request_in_uhz > max_refresh_cap_in_uhz ||
1134 min_refresh_request_in_uhz < min_refresh_cap_in_uhz)
1135 return false;
1136
1137 // Check max is within range
1138 if (max_refresh_request_in_uhz > max_refresh_cap_in_uhz ||
1139 max_refresh_request_in_uhz < min_refresh_cap_in_uhz)
1140 return false;
1141
1142 // For variable range, check for at least 10 Hz range
1143 if ((max_refresh_request_in_uhz != min_refresh_request_in_uhz) &&
1144 (max_refresh_request_in_uhz - min_refresh_request_in_uhz < 10))
1145 return false;
1146
1147 return true;
1148 }
1149
Ubuntu combined Linux kernel mirror