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#include "dc.h"
26#include "reg_helper.h"
27#include "dcn10_dpp.h"
28
29#include "dcn10_cm_common.h"
30#include "custom_float.h"
31
32#define REG(reg) reg
33
34#define CTX \
35 ctx
36
37#undef FN
38#define FN(reg_name, field_name) \
39 reg->shifts.field_name, reg->masks.field_name
40
41void cm_helper_program_color_matrices(
42 struct dc_context *ctx,
43 const uint16_t *regval,
44 const struct color_matrices_reg *reg)
45{
46 uint32_t cur_csc_reg;
47 unsigned int i = 0;
48
49 for (cur_csc_reg = reg->csc_c11_c12;
50 cur_csc_reg <= reg->csc_c33_c34;
51 cur_csc_reg++) {
52
53 const uint16_t *regval0 = &(regval[2 * i]);
54 const uint16_t *regval1 = &(regval[(2 * i) + 1]);
55
56 REG_SET_2(cur_csc_reg, 0,
57 csc_c11, *regval0,
58 csc_c12, *regval1);
59
60 i++;
61 }
62
63}
64
65void cm_helper_read_color_matrices(struct dc_context *ctx,
66 uint16_t *regval,
67 const struct color_matrices_reg *reg)
68{
69 uint32_t cur_csc_reg, regval0, regval1;
70 unsigned int i = 0;
71
72 for (cur_csc_reg = reg->csc_c11_c12;
73 cur_csc_reg <= reg->csc_c33_c34; cur_csc_reg++) {
74 REG_GET_2(cur_csc_reg,
75 csc_c11, &regval0,
76 csc_c12, &regval1);
77
78 regval[2 * i] = regval0;
79 regval[(2 * i) + 1] = regval1;
80
81 i++;
82 }
83}
84
85void cm_helper_program_xfer_func(
86 struct dc_context *ctx,
87 const struct pwl_params *params,
88 const struct xfer_func_reg *reg)
89{
90 uint32_t reg_region_cur;
91 unsigned int i = 0;
92
93 REG_SET_2(reg->start_cntl_b, 0,
94 exp_region_start, params->corner_points[0].blue.custom_float_x,
95 exp_resion_start_segment, 0);
96 REG_SET_2(reg->start_cntl_g, 0,
97 exp_region_start, params->corner_points[0].green.custom_float_x,
98 exp_resion_start_segment, 0);
99 REG_SET_2(reg->start_cntl_r, 0,
100 exp_region_start, params->corner_points[0].red.custom_float_x,
101 exp_resion_start_segment, 0);
102
103 REG_SET(reg->start_slope_cntl_b, 0,
104 field_region_linear_slope, params->corner_points[0].blue.custom_float_slope);
105 REG_SET(reg->start_slope_cntl_g, 0,
106 field_region_linear_slope, params->corner_points[0].green.custom_float_slope);
107 REG_SET(reg->start_slope_cntl_r, 0,
108 field_region_linear_slope, params->corner_points[0].red.custom_float_slope);
109
110 REG_SET(reg->start_end_cntl1_b, 0,
111 field_region_end, params->corner_points[1].blue.custom_float_x);
112 REG_SET_2(reg->start_end_cntl2_b, 0,
113 field_region_end_slope, params->corner_points[1].blue.custom_float_slope,
114 field_region_end_base, params->corner_points[1].blue.custom_float_y);
115
116 REG_SET(reg->start_end_cntl1_g, 0,
117 field_region_end, params->corner_points[1].green.custom_float_x);
118 REG_SET_2(reg->start_end_cntl2_g, 0,
119 field_region_end_slope, params->corner_points[1].green.custom_float_slope,
120 field_region_end_base, params->corner_points[1].green.custom_float_y);
121
122 REG_SET(reg->start_end_cntl1_r, 0,
123 field_region_end, params->corner_points[1].red.custom_float_x);
124 REG_SET_2(reg->start_end_cntl2_r, 0,
125 field_region_end_slope, params->corner_points[1].red.custom_float_slope,
126 field_region_end_base, params->corner_points[1].red.custom_float_y);
127
128 for (reg_region_cur = reg->region_start;
129 reg_region_cur <= reg->region_end;
130 reg_region_cur++) {
131
132 const struct gamma_curve *curve0 = &(params->arr_curve_points[2 * i]);
133 const struct gamma_curve *curve1 = &(params->arr_curve_points[(2 * i) + 1]);
134
135 REG_SET_4(reg_region_cur, 0,
136 exp_region0_lut_offset, curve0->offset,
137 exp_region0_num_segments, curve0->segments_num,
138 exp_region1_lut_offset, curve1->offset,
139 exp_region1_num_segments, curve1->segments_num);
140
141 i++;
142 }
143
144}
145
146
147
148bool cm_helper_convert_to_custom_float(
149 struct pwl_result_data *rgb_resulted,
150 struct curve_points3 *corner_points,
151 uint32_t hw_points_num,
152 bool fixpoint)
153{
154 struct custom_float_format fmt;
155
156 struct pwl_result_data *rgb = rgb_resulted;
157
158 uint32_t i = 0;
159
160 fmt.exponenta_bits = 6;
161 fmt.mantissa_bits = 12;
162 fmt.sign = false;
163
164 /* corner_points[0] - beginning base, slope offset for R,G,B
165 * corner_points[1] - end base, slope offset for R,G,B
166 */
167 if (!convert_to_custom_float_format(value: corner_points[0].red.x, format: &fmt,
168 result: &corner_points[0].red.custom_float_x)) {
169 BREAK_TO_DEBUGGER();
170 return false;
171 }
172 if (!convert_to_custom_float_format(value: corner_points[0].green.x, format: &fmt,
173 result: &corner_points[0].green.custom_float_x)) {
174 BREAK_TO_DEBUGGER();
175 return false;
176 }
177 if (!convert_to_custom_float_format(value: corner_points[0].blue.x, format: &fmt,
178 result: &corner_points[0].blue.custom_float_x)) {
179 BREAK_TO_DEBUGGER();
180 return false;
181 }
182
183 if (!convert_to_custom_float_format(value: corner_points[0].red.offset, format: &fmt,
184 result: &corner_points[0].red.custom_float_offset)) {
185 BREAK_TO_DEBUGGER();
186 return false;
187 }
188 if (!convert_to_custom_float_format(value: corner_points[0].green.offset, format: &fmt,
189 result: &corner_points[0].green.custom_float_offset)) {
190 BREAK_TO_DEBUGGER();
191 return false;
192 }
193 if (!convert_to_custom_float_format(value: corner_points[0].blue.offset, format: &fmt,
194 result: &corner_points[0].blue.custom_float_offset)) {
195 BREAK_TO_DEBUGGER();
196 return false;
197 }
198
199 if (!convert_to_custom_float_format(value: corner_points[0].red.slope, format: &fmt,
200 result: &corner_points[0].red.custom_float_slope)) {
201 BREAK_TO_DEBUGGER();
202 return false;
203 }
204 if (!convert_to_custom_float_format(value: corner_points[0].green.slope, format: &fmt,
205 result: &corner_points[0].green.custom_float_slope)) {
206 BREAK_TO_DEBUGGER();
207 return false;
208 }
209 if (!convert_to_custom_float_format(value: corner_points[0].blue.slope, format: &fmt,
210 result: &corner_points[0].blue.custom_float_slope)) {
211 BREAK_TO_DEBUGGER();
212 return false;
213 }
214
215 fmt.mantissa_bits = 10;
216 fmt.sign = false;
217
218 if (!convert_to_custom_float_format(value: corner_points[1].red.x, format: &fmt,
219 result: &corner_points[1].red.custom_float_x)) {
220 BREAK_TO_DEBUGGER();
221 return false;
222 }
223 if (!convert_to_custom_float_format(value: corner_points[1].green.x, format: &fmt,
224 result: &corner_points[1].green.custom_float_x)) {
225 BREAK_TO_DEBUGGER();
226 return false;
227 }
228 if (!convert_to_custom_float_format(value: corner_points[1].blue.x, format: &fmt,
229 result: &corner_points[1].blue.custom_float_x)) {
230 BREAK_TO_DEBUGGER();
231 return false;
232 }
233
234 if (fixpoint == true) {
235 corner_points[1].red.custom_float_y =
236 dc_fixpt_clamp_u0d14(arg: corner_points[1].red.y);
237 corner_points[1].green.custom_float_y =
238 dc_fixpt_clamp_u0d14(arg: corner_points[1].green.y);
239 corner_points[1].blue.custom_float_y =
240 dc_fixpt_clamp_u0d14(arg: corner_points[1].blue.y);
241 } else {
242 if (!convert_to_custom_float_format(value: corner_points[1].red.y,
243 format: &fmt, result: &corner_points[1].red.custom_float_y)) {
244 BREAK_TO_DEBUGGER();
245 return false;
246 }
247 if (!convert_to_custom_float_format(value: corner_points[1].green.y,
248 format: &fmt, result: &corner_points[1].green.custom_float_y)) {
249 BREAK_TO_DEBUGGER();
250 return false;
251 }
252 if (!convert_to_custom_float_format(value: corner_points[1].blue.y,
253 format: &fmt, result: &corner_points[1].blue.custom_float_y)) {
254 BREAK_TO_DEBUGGER();
255 return false;
256 }
257 }
258
259 if (!convert_to_custom_float_format(value: corner_points[1].red.slope, format: &fmt,
260 result: &corner_points[1].red.custom_float_slope)) {
261 BREAK_TO_DEBUGGER();
262 return false;
263 }
264 if (!convert_to_custom_float_format(value: corner_points[1].green.slope, format: &fmt,
265 result: &corner_points[1].green.custom_float_slope)) {
266 BREAK_TO_DEBUGGER();
267 return false;
268 }
269 if (!convert_to_custom_float_format(value: corner_points[1].blue.slope, format: &fmt,
270 result: &corner_points[1].blue.custom_float_slope)) {
271 BREAK_TO_DEBUGGER();
272 return false;
273 }
274
275 if (hw_points_num == 0 || rgb_resulted == NULL || fixpoint == true)
276 return true;
277
278 fmt.mantissa_bits = 12;
279 fmt.sign = true;
280
281 while (i != hw_points_num) {
282 if (!convert_to_custom_float_format(value: rgb->red, format: &fmt,
283 result: &rgb->red_reg)) {
284 BREAK_TO_DEBUGGER();
285 return false;
286 }
287
288 if (!convert_to_custom_float_format(value: rgb->green, format: &fmt,
289 result: &rgb->green_reg)) {
290 BREAK_TO_DEBUGGER();
291 return false;
292 }
293
294 if (!convert_to_custom_float_format(value: rgb->blue, format: &fmt,
295 result: &rgb->blue_reg)) {
296 BREAK_TO_DEBUGGER();
297 return false;
298 }
299
300 if (!convert_to_custom_float_format(value: rgb->delta_red, format: &fmt,
301 result: &rgb->delta_red_reg)) {
302 BREAK_TO_DEBUGGER();
303 return false;
304 }
305
306 if (!convert_to_custom_float_format(value: rgb->delta_green, format: &fmt,
307 result: &rgb->delta_green_reg)) {
308 BREAK_TO_DEBUGGER();
309 return false;
310 }
311
312 if (!convert_to_custom_float_format(value: rgb->delta_blue, format: &fmt,
313 result: &rgb->delta_blue_reg)) {
314 BREAK_TO_DEBUGGER();
315 return false;
316 }
317
318 ++rgb;
319 ++i;
320 }
321
322 return true;
323}
324
325/* driver uses 32 regions or less, but DCN HW has 34, extra 2 are set to 0 */
326#define MAX_REGIONS_NUMBER 34
327#define MAX_LOW_POINT 25
328#define NUMBER_REGIONS 32
329#define NUMBER_SW_SEGMENTS 16
330
331#define DC_LOGGER \
332 ctx->logger
333
334bool cm_helper_translate_curve_to_hw_format(struct dc_context *ctx,
335 const struct dc_transfer_func *output_tf,
336 struct pwl_params *lut_params, bool fixpoint)
337{
338 struct curve_points3 *corner_points;
339 struct pwl_result_data *rgb_resulted;
340 struct pwl_result_data *rgb;
341 struct pwl_result_data *rgb_plus_1;
342 struct pwl_result_data *rgb_minus_1;
343
344 int32_t region_start, region_end;
345 int32_t i;
346 uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
347
348 if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
349 return false;
350
351 corner_points = lut_params->corner_points;
352 rgb_resulted = lut_params->rgb_resulted;
353 hw_points = 0;
354
355 memset(lut_params, 0, sizeof(struct pwl_params));
356 memset(seg_distr, 0, sizeof(seg_distr));
357
358 if (output_tf->tf == TRANSFER_FUNCTION_PQ || output_tf->tf == TRANSFER_FUNCTION_GAMMA22) {
359 /* 32 segments
360 * segments are from 2^-25 to 2^7
361 */
362 for (i = 0; i < NUMBER_REGIONS ; i++)
363 seg_distr[i] = 3;
364
365 region_start = -MAX_LOW_POINT;
366 region_end = NUMBER_REGIONS - MAX_LOW_POINT;
367 } else {
368 /* 11 segments
369 * segment is from 2^-10 to 2^1
370 * There are less than 256 points, for optimization
371 */
372 seg_distr[0] = 3;
373 seg_distr[1] = 4;
374 seg_distr[2] = 4;
375 seg_distr[3] = 4;
376 seg_distr[4] = 4;
377 seg_distr[5] = 4;
378 seg_distr[6] = 4;
379 seg_distr[7] = 4;
380 seg_distr[8] = 4;
381 seg_distr[9] = 4;
382 seg_distr[10] = 1;
383
384 region_start = -10;
385 region_end = 1;
386 }
387
388 for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
389 seg_distr[i] = -1;
390
391 for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
392 if (seg_distr[k] != -1)
393 hw_points += (1 << seg_distr[k]);
394 }
395
396 j = 0;
397 for (k = 0; k < (region_end - region_start); k++) {
398 increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
399 start_index = (region_start + k + MAX_LOW_POINT) *
400 NUMBER_SW_SEGMENTS;
401 for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
402 i += increment) {
403 if (j == hw_points - 1)
404 break;
405 rgb_resulted[j].red = output_tf->tf_pts.red[i];
406 rgb_resulted[j].green = output_tf->tf_pts.green[i];
407 rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
408 j++;
409 }
410 }
411
412 /* last point */
413 start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
414 rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
415 rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
416 rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
417
418 rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
419 rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
420 rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
421
422 // All 3 color channels have same x
423 corner_points[0].red.x = dc_fixpt_pow(arg1: dc_fixpt_from_int(arg: 2),
424 arg2: dc_fixpt_from_int(arg: region_start));
425 corner_points[0].green.x = corner_points[0].red.x;
426 corner_points[0].blue.x = corner_points[0].red.x;
427
428 corner_points[1].red.x = dc_fixpt_pow(arg1: dc_fixpt_from_int(arg: 2),
429 arg2: dc_fixpt_from_int(arg: region_end));
430 corner_points[1].green.x = corner_points[1].red.x;
431 corner_points[1].blue.x = corner_points[1].red.x;
432
433 corner_points[0].red.y = rgb_resulted[0].red;
434 corner_points[0].green.y = rgb_resulted[0].green;
435 corner_points[0].blue.y = rgb_resulted[0].blue;
436
437 corner_points[0].red.slope = dc_fixpt_div(arg1: corner_points[0].red.y,
438 arg2: corner_points[0].red.x);
439 corner_points[0].green.slope = dc_fixpt_div(arg1: corner_points[0].green.y,
440 arg2: corner_points[0].green.x);
441 corner_points[0].blue.slope = dc_fixpt_div(arg1: corner_points[0].blue.y,
442 arg2: corner_points[0].blue.x);
443
444 /* see comment above, m_arrPoints[1].y should be the Y value for the
445 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
446 */
447 corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
448 corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
449 corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
450 corner_points[1].red.slope = dc_fixpt_zero;
451 corner_points[1].green.slope = dc_fixpt_zero;
452 corner_points[1].blue.slope = dc_fixpt_zero;
453
454 if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
455 /* for PQ, we want to have a straight line from last HW X point,
456 * and the slope to be such that we hit 1.0 at 10000 nits.
457 */
458 const struct fixed31_32 end_value =
459 dc_fixpt_from_int(arg: 125);
460
461 corner_points[1].red.slope = dc_fixpt_div(
462 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].red.y),
463 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].red.x));
464 corner_points[1].green.slope = dc_fixpt_div(
465 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].green.y),
466 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].green.x));
467 corner_points[1].blue.slope = dc_fixpt_div(
468 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].blue.y),
469 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].blue.x));
470 }
471
472 lut_params->hw_points_num = hw_points;
473
474 k = 0;
475 for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
476 if (seg_distr[k] != -1) {
477 lut_params->arr_curve_points[k].segments_num =
478 seg_distr[k];
479 lut_params->arr_curve_points[i].offset =
480 lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
481 }
482 k++;
483 }
484
485 if (seg_distr[k] != -1)
486 lut_params->arr_curve_points[k].segments_num = seg_distr[k];
487
488 rgb = rgb_resulted;
489 rgb_plus_1 = rgb_resulted + 1;
490 rgb_minus_1 = rgb;
491
492 i = 1;
493 while (i != hw_points + 1) {
494
495 if (i >= hw_points - 1) {
496 if (dc_fixpt_lt(arg1: rgb_plus_1->red, arg2: rgb->red))
497 rgb_plus_1->red = dc_fixpt_add(arg1: rgb->red, arg2: rgb_minus_1->delta_red);
498 if (dc_fixpt_lt(arg1: rgb_plus_1->green, arg2: rgb->green))
499 rgb_plus_1->green = dc_fixpt_add(arg1: rgb->green, arg2: rgb_minus_1->delta_green);
500 if (dc_fixpt_lt(arg1: rgb_plus_1->blue, arg2: rgb->blue))
501 rgb_plus_1->blue = dc_fixpt_add(arg1: rgb->blue, arg2: rgb_minus_1->delta_blue);
502 }
503
504 rgb->delta_red = dc_fixpt_sub(arg1: rgb_plus_1->red, arg2: rgb->red);
505 rgb->delta_green = dc_fixpt_sub(arg1: rgb_plus_1->green, arg2: rgb->green);
506 rgb->delta_blue = dc_fixpt_sub(arg1: rgb_plus_1->blue, arg2: rgb->blue);
507
508
509 if (fixpoint == true) {
510 uint32_t red_clamp = dc_fixpt_clamp_u0d14(arg: rgb->delta_red);
511 uint32_t green_clamp = dc_fixpt_clamp_u0d14(arg: rgb->delta_green);
512 uint32_t blue_clamp = dc_fixpt_clamp_u0d14(arg: rgb->delta_blue);
513
514 if (red_clamp >> 10 || green_clamp >> 10 || blue_clamp >> 10)
515 DC_LOG_WARNING("Losing delta precision while programming shaper LUT.");
516
517 rgb->delta_red_reg = red_clamp & 0x3ff;
518 rgb->delta_green_reg = green_clamp & 0x3ff;
519 rgb->delta_blue_reg = blue_clamp & 0x3ff;
520 rgb->red_reg = dc_fixpt_clamp_u0d14(arg: rgb->red);
521 rgb->green_reg = dc_fixpt_clamp_u0d14(arg: rgb->green);
522 rgb->blue_reg = dc_fixpt_clamp_u0d14(arg: rgb->blue);
523 }
524
525 ++rgb_plus_1;
526 rgb_minus_1 = rgb;
527 ++rgb;
528 ++i;
529 }
530 cm_helper_convert_to_custom_float(rgb_resulted,
531 corner_points: lut_params->corner_points,
532 hw_points_num: hw_points, fixpoint);
533
534 return true;
535}
536
537#define NUM_DEGAMMA_REGIONS 12
538
539
540bool cm_helper_translate_curve_to_degamma_hw_format(
541 const struct dc_transfer_func *output_tf,
542 struct pwl_params *lut_params)
543{
544 struct curve_points3 *corner_points;
545 struct pwl_result_data *rgb_resulted;
546 struct pwl_result_data *rgb;
547 struct pwl_result_data *rgb_plus_1;
548
549 int32_t region_start, region_end;
550 int32_t i;
551 uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
552
553 if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
554 return false;
555
556 corner_points = lut_params->corner_points;
557 rgb_resulted = lut_params->rgb_resulted;
558 hw_points = 0;
559
560 memset(lut_params, 0, sizeof(struct pwl_params));
561 memset(seg_distr, 0, sizeof(seg_distr));
562
563 region_start = -NUM_DEGAMMA_REGIONS;
564 region_end = 0;
565
566
567 for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
568 seg_distr[i] = -1;
569 /* 12 segments
570 * segments are from 2^-12 to 0
571 */
572 for (i = 0; i < NUM_DEGAMMA_REGIONS ; i++)
573 seg_distr[i] = 4;
574
575 for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
576 if (seg_distr[k] != -1)
577 hw_points += (1 << seg_distr[k]);
578 }
579
580 j = 0;
581 for (k = 0; k < (region_end - region_start); k++) {
582 increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
583 start_index = (region_start + k + MAX_LOW_POINT) *
584 NUMBER_SW_SEGMENTS;
585 for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
586 i += increment) {
587 if (j == hw_points - 1)
588 break;
589 rgb_resulted[j].red = output_tf->tf_pts.red[i];
590 rgb_resulted[j].green = output_tf->tf_pts.green[i];
591 rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
592 j++;
593 }
594 }
595
596 /* last point */
597 start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
598 rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
599 rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
600 rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
601
602 rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
603 rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
604 rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
605
606 corner_points[0].red.x = dc_fixpt_pow(arg1: dc_fixpt_from_int(arg: 2),
607 arg2: dc_fixpt_from_int(arg: region_start));
608 corner_points[0].green.x = corner_points[0].red.x;
609 corner_points[0].blue.x = corner_points[0].red.x;
610 corner_points[1].red.x = dc_fixpt_pow(arg1: dc_fixpt_from_int(arg: 2),
611 arg2: dc_fixpt_from_int(arg: region_end));
612 corner_points[1].green.x = corner_points[1].red.x;
613 corner_points[1].blue.x = corner_points[1].red.x;
614
615 corner_points[0].red.y = rgb_resulted[0].red;
616 corner_points[0].green.y = rgb_resulted[0].green;
617 corner_points[0].blue.y = rgb_resulted[0].blue;
618
619 /* see comment above, m_arrPoints[1].y should be the Y value for the
620 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
621 */
622 corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
623 corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
624 corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
625 corner_points[1].red.slope = dc_fixpt_zero;
626 corner_points[1].green.slope = dc_fixpt_zero;
627 corner_points[1].blue.slope = dc_fixpt_zero;
628
629 if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
630 /* for PQ, we want to have a straight line from last HW X point,
631 * and the slope to be such that we hit 1.0 at 10000 nits.
632 */
633 const struct fixed31_32 end_value =
634 dc_fixpt_from_int(arg: 125);
635
636 corner_points[1].red.slope = dc_fixpt_div(
637 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].red.y),
638 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].red.x));
639 corner_points[1].green.slope = dc_fixpt_div(
640 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].green.y),
641 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].green.x));
642 corner_points[1].blue.slope = dc_fixpt_div(
643 arg1: dc_fixpt_sub(arg1: dc_fixpt_one, arg2: corner_points[1].blue.y),
644 arg2: dc_fixpt_sub(arg1: end_value, arg2: corner_points[1].blue.x));
645 }
646
647 lut_params->hw_points_num = hw_points;
648
649 k = 0;
650 for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
651 if (seg_distr[k] != -1) {
652 lut_params->arr_curve_points[k].segments_num =
653 seg_distr[k];
654 lut_params->arr_curve_points[i].offset =
655 lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
656 }
657 k++;
658 }
659
660 if (seg_distr[k] != -1)
661 lut_params->arr_curve_points[k].segments_num = seg_distr[k];
662
663 rgb = rgb_resulted;
664 rgb_plus_1 = rgb_resulted + 1;
665
666 i = 1;
667 while (i != hw_points + 1) {
668 rgb->delta_red = dc_fixpt_sub(arg1: rgb_plus_1->red, arg2: rgb->red);
669 rgb->delta_green = dc_fixpt_sub(arg1: rgb_plus_1->green, arg2: rgb->green);
670 rgb->delta_blue = dc_fixpt_sub(arg1: rgb_plus_1->blue, arg2: rgb->blue);
671
672 ++rgb_plus_1;
673 ++rgb;
674 ++i;
675 }
676 cm_helper_convert_to_custom_float(rgb_resulted,
677 corner_points: lut_params->corner_points,
678 hw_points_num: hw_points, fixpoint: false);
679
680 return true;
681}
682

source code of linux/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c