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 
cm_helper_program_color_matrices(struct dc_context * ctx,const uint16_t * regval,const struct color_matrices_reg * reg)41 void 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 
cm_helper_program_xfer_func(struct dc_context * ctx,const struct pwl_params * params,const struct xfer_func_reg * reg)65 void cm_helper_program_xfer_func(
66 		struct dc_context *ctx,
67 		const struct pwl_params *params,
68 		const struct xfer_func_reg *reg)
69 {
70 	uint32_t reg_region_cur;
71 	unsigned int i = 0;
72 
73 	REG_SET_2(reg->start_cntl_b, 0,
74 			exp_region_start, params->corner_points[0].blue.custom_float_x,
75 			exp_resion_start_segment, 0);
76 	REG_SET_2(reg->start_cntl_g, 0,
77 			exp_region_start, params->corner_points[0].green.custom_float_x,
78 			exp_resion_start_segment, 0);
79 	REG_SET_2(reg->start_cntl_r, 0,
80 			exp_region_start, params->corner_points[0].red.custom_float_x,
81 			exp_resion_start_segment, 0);
82 
83 	REG_SET(reg->start_slope_cntl_b, 0,
84 			field_region_linear_slope, params->corner_points[0].blue.custom_float_slope);
85 	REG_SET(reg->start_slope_cntl_g, 0,
86 			field_region_linear_slope, params->corner_points[0].green.custom_float_slope);
87 	REG_SET(reg->start_slope_cntl_r, 0,
88 			field_region_linear_slope, params->corner_points[0].red.custom_float_slope);
89 
90 	REG_SET(reg->start_end_cntl1_b, 0,
91 			field_region_end, params->corner_points[1].blue.custom_float_x);
92 	REG_SET_2(reg->start_end_cntl2_b, 0,
93 			field_region_end_slope, params->corner_points[1].blue.custom_float_slope,
94 			field_region_end_base, params->corner_points[1].blue.custom_float_y);
95 
96 	REG_SET(reg->start_end_cntl1_g, 0,
97 			field_region_end, params->corner_points[1].green.custom_float_x);
98 	REG_SET_2(reg->start_end_cntl2_g, 0,
99 			field_region_end_slope, params->corner_points[1].green.custom_float_slope,
100 		field_region_end_base, params->corner_points[1].green.custom_float_y);
101 
102 	REG_SET(reg->start_end_cntl1_r, 0,
103 			field_region_end, params->corner_points[1].red.custom_float_x);
104 	REG_SET_2(reg->start_end_cntl2_r, 0,
105 			field_region_end_slope, params->corner_points[1].red.custom_float_slope,
106 		field_region_end_base, params->corner_points[1].red.custom_float_y);
107 
108 	for (reg_region_cur = reg->region_start;
109 			reg_region_cur <= reg->region_end;
110 			reg_region_cur++) {
111 
112 		const struct gamma_curve *curve0 = &(params->arr_curve_points[2 * i]);
113 		const struct gamma_curve *curve1 = &(params->arr_curve_points[(2 * i) + 1]);
114 
115 		REG_SET_4(reg_region_cur, 0,
116 				exp_region0_lut_offset, curve0->offset,
117 				exp_region0_num_segments, curve0->segments_num,
118 				exp_region1_lut_offset, curve1->offset,
119 				exp_region1_num_segments, curve1->segments_num);
120 
121 		i++;
122 	}
123 
124 }
125 
126 
127 
cm_helper_convert_to_custom_float(struct pwl_result_data * rgb_resulted,struct curve_points3 * corner_points,uint32_t hw_points_num,bool fixpoint)128 bool cm_helper_convert_to_custom_float(
129 		struct pwl_result_data *rgb_resulted,
130 		struct curve_points3 *corner_points,
131 		uint32_t hw_points_num,
132 		bool fixpoint)
133 {
134 	struct custom_float_format fmt;
135 
136 	struct pwl_result_data *rgb = rgb_resulted;
137 
138 	uint32_t i = 0;
139 
140 	fmt.exponenta_bits = 6;
141 	fmt.mantissa_bits = 12;
142 	fmt.sign = false;
143 
144 	/* corner_points[0] - beginning base, slope offset for R,G,B
145 	 * corner_points[1] - end base, slope offset for R,G,B
146 	 */
147 	if (!convert_to_custom_float_format(corner_points[0].red.x, &fmt,
148 				&corner_points[0].red.custom_float_x)) {
149 		BREAK_TO_DEBUGGER();
150 		return false;
151 	}
152 	if (!convert_to_custom_float_format(corner_points[0].green.x, &fmt,
153 				&corner_points[0].green.custom_float_x)) {
154 		BREAK_TO_DEBUGGER();
155 		return false;
156 	}
157 	if (!convert_to_custom_float_format(corner_points[0].blue.x, &fmt,
158 				&corner_points[0].blue.custom_float_x)) {
159 		BREAK_TO_DEBUGGER();
160 		return false;
161 	}
162 
163 	if (!convert_to_custom_float_format(corner_points[0].red.offset, &fmt,
164 				&corner_points[0].red.custom_float_offset)) {
165 		BREAK_TO_DEBUGGER();
166 		return false;
167 	}
168 	if (!convert_to_custom_float_format(corner_points[0].green.offset, &fmt,
169 				&corner_points[0].green.custom_float_offset)) {
170 		BREAK_TO_DEBUGGER();
171 		return false;
172 	}
173 	if (!convert_to_custom_float_format(corner_points[0].blue.offset, &fmt,
174 				&corner_points[0].blue.custom_float_offset)) {
175 		BREAK_TO_DEBUGGER();
176 		return false;
177 	}
178 
179 	if (!convert_to_custom_float_format(corner_points[0].red.slope, &fmt,
180 				&corner_points[0].red.custom_float_slope)) {
181 		BREAK_TO_DEBUGGER();
182 		return false;
183 	}
184 	if (!convert_to_custom_float_format(corner_points[0].green.slope, &fmt,
185 				&corner_points[0].green.custom_float_slope)) {
186 		BREAK_TO_DEBUGGER();
187 		return false;
188 	}
189 	if (!convert_to_custom_float_format(corner_points[0].blue.slope, &fmt,
190 				&corner_points[0].blue.custom_float_slope)) {
191 		BREAK_TO_DEBUGGER();
192 		return false;
193 	}
194 
195 	fmt.mantissa_bits = 10;
196 	fmt.sign = false;
197 
198 	if (!convert_to_custom_float_format(corner_points[1].red.x, &fmt,
199 				&corner_points[1].red.custom_float_x)) {
200 		BREAK_TO_DEBUGGER();
201 		return false;
202 	}
203 	if (!convert_to_custom_float_format(corner_points[1].green.x, &fmt,
204 				&corner_points[1].green.custom_float_x)) {
205 		BREAK_TO_DEBUGGER();
206 		return false;
207 	}
208 	if (!convert_to_custom_float_format(corner_points[1].blue.x, &fmt,
209 				&corner_points[1].blue.custom_float_x)) {
210 		BREAK_TO_DEBUGGER();
211 		return false;
212 	}
213 
214 	if (fixpoint == true) {
215 		corner_points[1].red.custom_float_y =
216 				dc_fixpt_clamp_u0d14(corner_points[1].red.y);
217 		corner_points[1].green.custom_float_y =
218 				dc_fixpt_clamp_u0d14(corner_points[1].green.y);
219 		corner_points[1].blue.custom_float_y =
220 				dc_fixpt_clamp_u0d14(corner_points[1].blue.y);
221 	} else {
222 		if (!convert_to_custom_float_format(corner_points[1].red.y,
223 				&fmt, &corner_points[1].red.custom_float_y)) {
224 			BREAK_TO_DEBUGGER();
225 			return false;
226 		}
227 		if (!convert_to_custom_float_format(corner_points[1].green.y,
228 				&fmt, &corner_points[1].green.custom_float_y)) {
229 			BREAK_TO_DEBUGGER();
230 			return false;
231 		}
232 		if (!convert_to_custom_float_format(corner_points[1].blue.y,
233 				&fmt, &corner_points[1].blue.custom_float_y)) {
234 			BREAK_TO_DEBUGGER();
235 			return false;
236 		}
237 	}
238 
239 	if (!convert_to_custom_float_format(corner_points[1].red.slope, &fmt,
240 				&corner_points[1].red.custom_float_slope)) {
241 		BREAK_TO_DEBUGGER();
242 		return false;
243 	}
244 	if (!convert_to_custom_float_format(corner_points[1].green.slope, &fmt,
245 				&corner_points[1].green.custom_float_slope)) {
246 		BREAK_TO_DEBUGGER();
247 		return false;
248 	}
249 	if (!convert_to_custom_float_format(corner_points[1].blue.slope, &fmt,
250 				&corner_points[1].blue.custom_float_slope)) {
251 		BREAK_TO_DEBUGGER();
252 		return false;
253 	}
254 
255 	if (hw_points_num == 0 || rgb_resulted == NULL || fixpoint == true)
256 		return true;
257 
258 	fmt.mantissa_bits = 12;
259 	fmt.sign = true;
260 
261 	while (i != hw_points_num) {
262 		if (!convert_to_custom_float_format(rgb->red, &fmt,
263 						    &rgb->red_reg)) {
264 			BREAK_TO_DEBUGGER();
265 			return false;
266 		}
267 
268 		if (!convert_to_custom_float_format(rgb->green, &fmt,
269 						    &rgb->green_reg)) {
270 			BREAK_TO_DEBUGGER();
271 			return false;
272 		}
273 
274 		if (!convert_to_custom_float_format(rgb->blue, &fmt,
275 						    &rgb->blue_reg)) {
276 			BREAK_TO_DEBUGGER();
277 			return false;
278 		}
279 
280 		if (!convert_to_custom_float_format(rgb->delta_red, &fmt,
281 						    &rgb->delta_red_reg)) {
282 			BREAK_TO_DEBUGGER();
283 			return false;
284 		}
285 
286 		if (!convert_to_custom_float_format(rgb->delta_green, &fmt,
287 						    &rgb->delta_green_reg)) {
288 			BREAK_TO_DEBUGGER();
289 			return false;
290 		}
291 
292 		if (!convert_to_custom_float_format(rgb->delta_blue, &fmt,
293 						    &rgb->delta_blue_reg)) {
294 			BREAK_TO_DEBUGGER();
295 			return false;
296 		}
297 
298 		++rgb;
299 		++i;
300 	}
301 
302 	return true;
303 }
304 
305 /* driver uses 32 regions or less, but DCN HW has 34, extra 2 are set to 0 */
306 #define MAX_REGIONS_NUMBER 34
307 #define MAX_LOW_POINT      25
308 #define NUMBER_REGIONS     32
309 #define NUMBER_SW_SEGMENTS 16
310 
cm_helper_translate_curve_to_hw_format(const struct dc_transfer_func * output_tf,struct pwl_params * lut_params,bool fixpoint)311 bool cm_helper_translate_curve_to_hw_format(
312 				const struct dc_transfer_func *output_tf,
313 				struct pwl_params *lut_params, bool fixpoint)
314 {
315 	struct curve_points3 *corner_points;
316 	struct pwl_result_data *rgb_resulted;
317 	struct pwl_result_data *rgb;
318 	struct pwl_result_data *rgb_plus_1;
319 	struct pwl_result_data *rgb_minus_1;
320 
321 	int32_t region_start, region_end;
322 	int32_t i;
323 	uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
324 
325 	if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
326 		return false;
327 
328 	corner_points = lut_params->corner_points;
329 	rgb_resulted = lut_params->rgb_resulted;
330 	hw_points = 0;
331 
332 	memset(lut_params, 0, sizeof(struct pwl_params));
333 	memset(seg_distr, 0, sizeof(seg_distr));
334 
335 	if (output_tf->tf == TRANSFER_FUNCTION_PQ || output_tf->tf == TRANSFER_FUNCTION_GAMMA22) {
336 		/* 32 segments
337 		 * segments are from 2^-25 to 2^7
338 		 */
339 		for (i = 0; i < NUMBER_REGIONS ; i++)
340 			seg_distr[i] = 3;
341 
342 		region_start = -MAX_LOW_POINT;
343 		region_end   = NUMBER_REGIONS - MAX_LOW_POINT;
344 	} else {
345 		/* 11 segments
346 		 * segment is from 2^-10 to 2^1
347 		 * There are less than 256 points, for optimization
348 		 */
349 		seg_distr[0] = 3;
350 		seg_distr[1] = 4;
351 		seg_distr[2] = 4;
352 		seg_distr[3] = 4;
353 		seg_distr[4] = 4;
354 		seg_distr[5] = 4;
355 		seg_distr[6] = 4;
356 		seg_distr[7] = 4;
357 		seg_distr[8] = 4;
358 		seg_distr[9] = 4;
359 		seg_distr[10] = 1;
360 
361 		region_start = -10;
362 		region_end = 1;
363 	}
364 
365 	for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
366 		seg_distr[i] = -1;
367 
368 	for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
369 		if (seg_distr[k] != -1)
370 			hw_points += (1 << seg_distr[k]);
371 	}
372 
373 	j = 0;
374 	for (k = 0; k < (region_end - region_start); k++) {
375 		increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
376 		start_index = (region_start + k + MAX_LOW_POINT) *
377 				NUMBER_SW_SEGMENTS;
378 		for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
379 				i += increment) {
380 			if (j == hw_points - 1)
381 				break;
382 			rgb_resulted[j].red = output_tf->tf_pts.red[i];
383 			rgb_resulted[j].green = output_tf->tf_pts.green[i];
384 			rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
385 			j++;
386 		}
387 	}
388 
389 	/* last point */
390 	start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
391 	rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
392 	rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
393 	rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
394 
395 	rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
396 	rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
397 	rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
398 
399 	// All 3 color channels have same x
400 	corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
401 					     dc_fixpt_from_int(region_start));
402 	corner_points[0].green.x = corner_points[0].red.x;
403 	corner_points[0].blue.x = corner_points[0].red.x;
404 
405 	corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
406 					     dc_fixpt_from_int(region_end));
407 	corner_points[1].green.x = corner_points[1].red.x;
408 	corner_points[1].blue.x = corner_points[1].red.x;
409 
410 	corner_points[0].red.y = rgb_resulted[0].red;
411 	corner_points[0].green.y = rgb_resulted[0].green;
412 	corner_points[0].blue.y = rgb_resulted[0].blue;
413 
414 	corner_points[0].red.slope = dc_fixpt_div(corner_points[0].red.y,
415 			corner_points[0].red.x);
416 	corner_points[0].green.slope = dc_fixpt_div(corner_points[0].green.y,
417 			corner_points[0].green.x);
418 	corner_points[0].blue.slope = dc_fixpt_div(corner_points[0].blue.y,
419 			corner_points[0].blue.x);
420 
421 	/* see comment above, m_arrPoints[1].y should be the Y value for the
422 	 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
423 	 */
424 	corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
425 	corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
426 	corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
427 	corner_points[1].red.slope = dc_fixpt_zero;
428 	corner_points[1].green.slope = dc_fixpt_zero;
429 	corner_points[1].blue.slope = dc_fixpt_zero;
430 
431 	if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
432 		/* for PQ, we want to have a straight line from last HW X point,
433 		 * and the slope to be such that we hit 1.0 at 10000 nits.
434 		 */
435 		const struct fixed31_32 end_value =
436 				dc_fixpt_from_int(125);
437 
438 		corner_points[1].red.slope = dc_fixpt_div(
439 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
440 			dc_fixpt_sub(end_value, corner_points[1].red.x));
441 		corner_points[1].green.slope = dc_fixpt_div(
442 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
443 			dc_fixpt_sub(end_value, corner_points[1].green.x));
444 		corner_points[1].blue.slope = dc_fixpt_div(
445 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
446 			dc_fixpt_sub(end_value, corner_points[1].blue.x));
447 	}
448 
449 	lut_params->hw_points_num = hw_points;
450 
451 	k = 0;
452 	for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
453 		if (seg_distr[k] != -1) {
454 			lut_params->arr_curve_points[k].segments_num =
455 					seg_distr[k];
456 			lut_params->arr_curve_points[i].offset =
457 					lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
458 		}
459 		k++;
460 	}
461 
462 	if (seg_distr[k] != -1)
463 		lut_params->arr_curve_points[k].segments_num = seg_distr[k];
464 
465 	rgb = rgb_resulted;
466 	rgb_plus_1 = rgb_resulted + 1;
467 	rgb_minus_1 = rgb;
468 
469 	i = 1;
470 	while (i != hw_points + 1) {
471 
472 		if (i >= hw_points - 1) {
473 			if (dc_fixpt_lt(rgb_plus_1->red, rgb->red))
474 				rgb_plus_1->red = dc_fixpt_add(rgb->red, rgb_minus_1->delta_red);
475 			if (dc_fixpt_lt(rgb_plus_1->green, rgb->green))
476 				rgb_plus_1->green = dc_fixpt_add(rgb->green, rgb_minus_1->delta_green);
477 			if (dc_fixpt_lt(rgb_plus_1->blue, rgb->blue))
478 				rgb_plus_1->blue = dc_fixpt_add(rgb->blue, rgb_minus_1->delta_blue);
479 		}
480 
481 		rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
482 		rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
483 		rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
484 
485 		if (fixpoint == true) {
486 			rgb->delta_red_reg   = dc_fixpt_clamp_u0d10(rgb->delta_red);
487 			rgb->delta_green_reg = dc_fixpt_clamp_u0d10(rgb->delta_green);
488 			rgb->delta_blue_reg  = dc_fixpt_clamp_u0d10(rgb->delta_blue);
489 			rgb->red_reg         = dc_fixpt_clamp_u0d14(rgb->red);
490 			rgb->green_reg       = dc_fixpt_clamp_u0d14(rgb->green);
491 			rgb->blue_reg        = dc_fixpt_clamp_u0d14(rgb->blue);
492 		}
493 
494 		++rgb_plus_1;
495 		rgb_minus_1 = rgb;
496 		++rgb;
497 		++i;
498 	}
499 	cm_helper_convert_to_custom_float(rgb_resulted,
500 						lut_params->corner_points,
501 						hw_points, fixpoint);
502 
503 	return true;
504 }
505 
506 #define NUM_DEGAMMA_REGIONS    12
507 
508 
cm_helper_translate_curve_to_degamma_hw_format(const struct dc_transfer_func * output_tf,struct pwl_params * lut_params)509 bool cm_helper_translate_curve_to_degamma_hw_format(
510 				const struct dc_transfer_func *output_tf,
511 				struct pwl_params *lut_params)
512 {
513 	struct curve_points3 *corner_points;
514 	struct pwl_result_data *rgb_resulted;
515 	struct pwl_result_data *rgb;
516 	struct pwl_result_data *rgb_plus_1;
517 
518 	int32_t region_start, region_end;
519 	int32_t i;
520 	uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
521 
522 	if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
523 		return false;
524 
525 	corner_points = lut_params->corner_points;
526 	rgb_resulted = lut_params->rgb_resulted;
527 	hw_points = 0;
528 
529 	memset(lut_params, 0, sizeof(struct pwl_params));
530 	memset(seg_distr, 0, sizeof(seg_distr));
531 
532 	region_start = -NUM_DEGAMMA_REGIONS;
533 	region_end   = 0;
534 
535 
536 	for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
537 		seg_distr[i] = -1;
538 	/* 12 segments
539 	 * segments are from 2^-12 to 0
540 	 */
541 	for (i = 0; i < NUM_DEGAMMA_REGIONS ; i++)
542 		seg_distr[i] = 4;
543 
544 	for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
545 		if (seg_distr[k] != -1)
546 			hw_points += (1 << seg_distr[k]);
547 	}
548 
549 	j = 0;
550 	for (k = 0; k < (region_end - region_start); k++) {
551 		increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
552 		start_index = (region_start + k + MAX_LOW_POINT) *
553 				NUMBER_SW_SEGMENTS;
554 		for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
555 				i += increment) {
556 			if (j == hw_points - 1)
557 				break;
558 			rgb_resulted[j].red = output_tf->tf_pts.red[i];
559 			rgb_resulted[j].green = output_tf->tf_pts.green[i];
560 			rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
561 			j++;
562 		}
563 	}
564 
565 	/* last point */
566 	start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
567 	rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
568 	rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
569 	rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
570 
571 	rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
572 	rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
573 	rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
574 
575 	corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
576 					     dc_fixpt_from_int(region_start));
577 	corner_points[0].green.x = corner_points[0].red.x;
578 	corner_points[0].blue.x = corner_points[0].red.x;
579 	corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
580 					     dc_fixpt_from_int(region_end));
581 	corner_points[1].green.x = corner_points[1].red.x;
582 	corner_points[1].blue.x = corner_points[1].red.x;
583 
584 	corner_points[0].red.y = rgb_resulted[0].red;
585 	corner_points[0].green.y = rgb_resulted[0].green;
586 	corner_points[0].blue.y = rgb_resulted[0].blue;
587 
588 	/* see comment above, m_arrPoints[1].y should be the Y value for the
589 	 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
590 	 */
591 	corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
592 	corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
593 	corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
594 	corner_points[1].red.slope = dc_fixpt_zero;
595 	corner_points[1].green.slope = dc_fixpt_zero;
596 	corner_points[1].blue.slope = dc_fixpt_zero;
597 
598 	if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
599 		/* for PQ, we want to have a straight line from last HW X point,
600 		 * and the slope to be such that we hit 1.0 at 10000 nits.
601 		 */
602 		const struct fixed31_32 end_value =
603 				dc_fixpt_from_int(125);
604 
605 		corner_points[1].red.slope = dc_fixpt_div(
606 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
607 			dc_fixpt_sub(end_value, corner_points[1].red.x));
608 		corner_points[1].green.slope = dc_fixpt_div(
609 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
610 			dc_fixpt_sub(end_value, corner_points[1].green.x));
611 		corner_points[1].blue.slope = dc_fixpt_div(
612 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
613 			dc_fixpt_sub(end_value, corner_points[1].blue.x));
614 	}
615 
616 	lut_params->hw_points_num = hw_points;
617 
618 	k = 0;
619 	for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
620 		if (seg_distr[k] != -1) {
621 			lut_params->arr_curve_points[k].segments_num =
622 					seg_distr[k];
623 			lut_params->arr_curve_points[i].offset =
624 					lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
625 		}
626 		k++;
627 	}
628 
629 	if (seg_distr[k] != -1)
630 		lut_params->arr_curve_points[k].segments_num = seg_distr[k];
631 
632 	rgb = rgb_resulted;
633 	rgb_plus_1 = rgb_resulted + 1;
634 
635 	i = 1;
636 	while (i != hw_points + 1) {
637 		rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
638 		rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
639 		rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
640 
641 		++rgb_plus_1;
642 		++rgb;
643 		++i;
644 	}
645 	cm_helper_convert_to_custom_float(rgb_resulted,
646 						lut_params->corner_points,
647 						hw_points, false);
648 
649 	return true;
650 }
651