xref: /netbsd-src/sys/external/bsd/drm2/dist/drm/amd/display/dc/dcn10/amdgpu_dcn10_cm_common.c (revision 41ec02673d281bbb3d38e6c78504ce6e30c228c1)
1 /*	$NetBSD: amdgpu_dcn10_cm_common.c,v 1.2 2021/12/18 23:45:03 riastradh Exp $	*/
2 
3 /*
4  * Copyright 2016 Advanced Micro Devices, Inc.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors: AMD
25  *
26  */
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: amdgpu_dcn10_cm_common.c,v 1.2 2021/12/18 23:45:03 riastradh Exp $");
29 
30 #include "dc.h"
31 #include "reg_helper.h"
32 #include "dcn10_dpp.h"
33 
34 #include "dcn10_cm_common.h"
35 #include "custom_float.h"
36 
37 #define REG(reg) reg
38 
39 #define CTX \
40 	ctx
41 
42 #undef FN
43 #define FN(reg_name, field_name) \
44 	reg->shifts.field_name, reg->masks.field_name
45 
cm_helper_program_color_matrices(struct dc_context * ctx,const uint16_t * regval,const struct color_matrices_reg * reg)46 void cm_helper_program_color_matrices(
47 		struct dc_context *ctx,
48 		const uint16_t *regval,
49 		const struct color_matrices_reg *reg)
50 {
51 	uint32_t cur_csc_reg;
52 	unsigned int i = 0;
53 
54 	for (cur_csc_reg = reg->csc_c11_c12;
55 			cur_csc_reg <= reg->csc_c33_c34;
56 			cur_csc_reg++) {
57 
58 		const uint16_t *regval0 = &(regval[2 * i]);
59 		const uint16_t *regval1 = &(regval[(2 * i) + 1]);
60 
61 		REG_SET_2(cur_csc_reg, 0,
62 				csc_c11, *regval0,
63 				csc_c12, *regval1);
64 
65 		i++;
66 	}
67 
68 }
69 
cm_helper_program_xfer_func(struct dc_context * ctx,const struct pwl_params * params,const struct xfer_func_reg * reg)70 void cm_helper_program_xfer_func(
71 		struct dc_context *ctx,
72 		const struct pwl_params *params,
73 		const struct xfer_func_reg *reg)
74 {
75 	uint32_t reg_region_cur;
76 	unsigned int i = 0;
77 
78 	REG_SET_2(reg->start_cntl_b, 0,
79 			exp_region_start, params->corner_points[0].blue.custom_float_x,
80 			exp_resion_start_segment, 0);
81 	REG_SET_2(reg->start_cntl_g, 0,
82 			exp_region_start, params->corner_points[0].green.custom_float_x,
83 			exp_resion_start_segment, 0);
84 	REG_SET_2(reg->start_cntl_r, 0,
85 			exp_region_start, params->corner_points[0].red.custom_float_x,
86 			exp_resion_start_segment, 0);
87 
88 	REG_SET(reg->start_slope_cntl_b, 0,
89 			field_region_linear_slope, params->corner_points[0].blue.custom_float_slope);
90 	REG_SET(reg->start_slope_cntl_g, 0,
91 			field_region_linear_slope, params->corner_points[0].green.custom_float_slope);
92 	REG_SET(reg->start_slope_cntl_r, 0,
93 			field_region_linear_slope, params->corner_points[0].red.custom_float_slope);
94 
95 	REG_SET(reg->start_end_cntl1_b, 0,
96 			field_region_end, params->corner_points[1].blue.custom_float_x);
97 	REG_SET_2(reg->start_end_cntl2_b, 0,
98 			field_region_end_slope, params->corner_points[1].blue.custom_float_slope,
99 			field_region_end_base, params->corner_points[1].blue.custom_float_y);
100 
101 	REG_SET(reg->start_end_cntl1_g, 0,
102 			field_region_end, params->corner_points[1].green.custom_float_x);
103 	REG_SET_2(reg->start_end_cntl2_g, 0,
104 			field_region_end_slope, params->corner_points[1].green.custom_float_slope,
105 		field_region_end_base, params->corner_points[1].green.custom_float_y);
106 
107 	REG_SET(reg->start_end_cntl1_r, 0,
108 			field_region_end, params->corner_points[1].red.custom_float_x);
109 	REG_SET_2(reg->start_end_cntl2_r, 0,
110 			field_region_end_slope, params->corner_points[1].red.custom_float_slope,
111 		field_region_end_base, params->corner_points[1].red.custom_float_y);
112 
113 	for (reg_region_cur = reg->region_start;
114 			reg_region_cur <= reg->region_end;
115 			reg_region_cur++) {
116 
117 		const struct gamma_curve *curve0 = &(params->arr_curve_points[2 * i]);
118 		const struct gamma_curve *curve1 = &(params->arr_curve_points[(2 * i) + 1]);
119 
120 		REG_SET_4(reg_region_cur, 0,
121 				exp_region0_lut_offset, curve0->offset,
122 				exp_region0_num_segments, curve0->segments_num,
123 				exp_region1_lut_offset, curve1->offset,
124 				exp_region1_num_segments, curve1->segments_num);
125 
126 		i++;
127 	}
128 
129 }
130 
131 
132 
cm_helper_convert_to_custom_float(struct pwl_result_data * rgb_resulted,struct curve_points3 * corner_points,uint32_t hw_points_num,bool fixpoint)133 bool cm_helper_convert_to_custom_float(
134 		struct pwl_result_data *rgb_resulted,
135 		struct curve_points3 *corner_points,
136 		uint32_t hw_points_num,
137 		bool fixpoint)
138 {
139 	struct custom_float_format fmt;
140 
141 	struct pwl_result_data *rgb = rgb_resulted;
142 
143 	uint32_t i = 0;
144 
145 	fmt.exponenta_bits = 6;
146 	fmt.mantissa_bits = 12;
147 	fmt.sign = false;
148 
149 	/* corner_points[0] - beginning base, slope offset for R,G,B
150 	 * corner_points[1] - end base, slope offset for R,G,B
151 	 */
152 	if (!convert_to_custom_float_format(corner_points[0].red.x, &fmt,
153 				&corner_points[0].red.custom_float_x)) {
154 		BREAK_TO_DEBUGGER();
155 		return false;
156 	}
157 	if (!convert_to_custom_float_format(corner_points[0].green.x, &fmt,
158 				&corner_points[0].green.custom_float_x)) {
159 		BREAK_TO_DEBUGGER();
160 		return false;
161 	}
162 	if (!convert_to_custom_float_format(corner_points[0].blue.x, &fmt,
163 				&corner_points[0].blue.custom_float_x)) {
164 		BREAK_TO_DEBUGGER();
165 		return false;
166 	}
167 
168 	if (!convert_to_custom_float_format(corner_points[0].red.offset, &fmt,
169 				&corner_points[0].red.custom_float_offset)) {
170 		BREAK_TO_DEBUGGER();
171 		return false;
172 	}
173 	if (!convert_to_custom_float_format(corner_points[0].green.offset, &fmt,
174 				&corner_points[0].green.custom_float_offset)) {
175 		BREAK_TO_DEBUGGER();
176 		return false;
177 	}
178 	if (!convert_to_custom_float_format(corner_points[0].blue.offset, &fmt,
179 				&corner_points[0].blue.custom_float_offset)) {
180 		BREAK_TO_DEBUGGER();
181 		return false;
182 	}
183 
184 	if (!convert_to_custom_float_format(corner_points[0].red.slope, &fmt,
185 				&corner_points[0].red.custom_float_slope)) {
186 		BREAK_TO_DEBUGGER();
187 		return false;
188 	}
189 	if (!convert_to_custom_float_format(corner_points[0].green.slope, &fmt,
190 				&corner_points[0].green.custom_float_slope)) {
191 		BREAK_TO_DEBUGGER();
192 		return false;
193 	}
194 	if (!convert_to_custom_float_format(corner_points[0].blue.slope, &fmt,
195 				&corner_points[0].blue.custom_float_slope)) {
196 		BREAK_TO_DEBUGGER();
197 		return false;
198 	}
199 
200 	fmt.mantissa_bits = 10;
201 	fmt.sign = false;
202 
203 	if (!convert_to_custom_float_format(corner_points[1].red.x, &fmt,
204 				&corner_points[1].red.custom_float_x)) {
205 		BREAK_TO_DEBUGGER();
206 		return false;
207 	}
208 	if (!convert_to_custom_float_format(corner_points[1].green.x, &fmt,
209 				&corner_points[1].green.custom_float_x)) {
210 		BREAK_TO_DEBUGGER();
211 		return false;
212 	}
213 	if (!convert_to_custom_float_format(corner_points[1].blue.x, &fmt,
214 				&corner_points[1].blue.custom_float_x)) {
215 		BREAK_TO_DEBUGGER();
216 		return false;
217 	}
218 
219 	if (fixpoint == true) {
220 		corner_points[1].red.custom_float_y =
221 				dc_fixpt_clamp_u0d14(corner_points[1].red.y);
222 		corner_points[1].green.custom_float_y =
223 				dc_fixpt_clamp_u0d14(corner_points[1].green.y);
224 		corner_points[1].blue.custom_float_y =
225 				dc_fixpt_clamp_u0d14(corner_points[1].blue.y);
226 	} else {
227 		if (!convert_to_custom_float_format(corner_points[1].red.y,
228 				&fmt, &corner_points[1].red.custom_float_y)) {
229 			BREAK_TO_DEBUGGER();
230 			return false;
231 		}
232 		if (!convert_to_custom_float_format(corner_points[1].green.y,
233 				&fmt, &corner_points[1].green.custom_float_y)) {
234 			BREAK_TO_DEBUGGER();
235 			return false;
236 		}
237 		if (!convert_to_custom_float_format(corner_points[1].blue.y,
238 				&fmt, &corner_points[1].blue.custom_float_y)) {
239 			BREAK_TO_DEBUGGER();
240 			return false;
241 		}
242 	}
243 
244 	if (!convert_to_custom_float_format(corner_points[1].red.slope, &fmt,
245 				&corner_points[1].red.custom_float_slope)) {
246 		BREAK_TO_DEBUGGER();
247 		return false;
248 	}
249 	if (!convert_to_custom_float_format(corner_points[1].green.slope, &fmt,
250 				&corner_points[1].green.custom_float_slope)) {
251 		BREAK_TO_DEBUGGER();
252 		return false;
253 	}
254 	if (!convert_to_custom_float_format(corner_points[1].blue.slope, &fmt,
255 				&corner_points[1].blue.custom_float_slope)) {
256 		BREAK_TO_DEBUGGER();
257 		return false;
258 	}
259 
260 	if (hw_points_num == 0 || rgb_resulted == NULL || fixpoint == true)
261 		return true;
262 
263 	fmt.mantissa_bits = 12;
264 	fmt.sign = true;
265 
266 	while (i != hw_points_num) {
267 		if (!convert_to_custom_float_format(rgb->red, &fmt,
268 						    &rgb->red_reg)) {
269 			BREAK_TO_DEBUGGER();
270 			return false;
271 		}
272 
273 		if (!convert_to_custom_float_format(rgb->green, &fmt,
274 						    &rgb->green_reg)) {
275 			BREAK_TO_DEBUGGER();
276 			return false;
277 		}
278 
279 		if (!convert_to_custom_float_format(rgb->blue, &fmt,
280 						    &rgb->blue_reg)) {
281 			BREAK_TO_DEBUGGER();
282 			return false;
283 		}
284 
285 		if (!convert_to_custom_float_format(rgb->delta_red, &fmt,
286 						    &rgb->delta_red_reg)) {
287 			BREAK_TO_DEBUGGER();
288 			return false;
289 		}
290 
291 		if (!convert_to_custom_float_format(rgb->delta_green, &fmt,
292 						    &rgb->delta_green_reg)) {
293 			BREAK_TO_DEBUGGER();
294 			return false;
295 		}
296 
297 		if (!convert_to_custom_float_format(rgb->delta_blue, &fmt,
298 						    &rgb->delta_blue_reg)) {
299 			BREAK_TO_DEBUGGER();
300 			return false;
301 		}
302 
303 		++rgb;
304 		++i;
305 	}
306 
307 	return true;
308 }
309 
310 /* driver uses 32 regions or less, but DCN HW has 34, extra 2 are set to 0 */
311 #define MAX_REGIONS_NUMBER 34
312 #define MAX_LOW_POINT      25
313 #define NUMBER_REGIONS     32
314 #define NUMBER_SW_SEGMENTS 16
315 
cm_helper_translate_curve_to_hw_format(const struct dc_transfer_func * output_tf,struct pwl_params * lut_params,bool fixpoint)316 bool cm_helper_translate_curve_to_hw_format(
317 				const struct dc_transfer_func *output_tf,
318 				struct pwl_params *lut_params, bool fixpoint)
319 {
320 	struct curve_points3 *corner_points;
321 	struct pwl_result_data *rgb_resulted;
322 	struct pwl_result_data *rgb;
323 	struct pwl_result_data *rgb_plus_1;
324 
325 	int32_t region_start, region_end;
326 	int32_t i;
327 	uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
328 
329 	if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
330 		return false;
331 
332 	PERF_TRACE_CTX(output_tf->ctx);
333 
334 	corner_points = lut_params->corner_points;
335 	rgb_resulted = lut_params->rgb_resulted;
336 	hw_points = 0;
337 
338 	memset(lut_params, 0, sizeof(struct pwl_params));
339 	memset(seg_distr, 0, sizeof(seg_distr));
340 
341 	if (output_tf->tf == TRANSFER_FUNCTION_PQ || output_tf->tf == TRANSFER_FUNCTION_GAMMA22) {
342 		/* 32 segments
343 		 * segments are from 2^-25 to 2^7
344 		 */
345 		for (i = 0; i < NUMBER_REGIONS ; i++)
346 			seg_distr[i] = 3;
347 
348 		region_start = -MAX_LOW_POINT;
349 		region_end   = NUMBER_REGIONS - MAX_LOW_POINT;
350 	} else {
351 		/* 11 segments
352 		 * segment is from 2^-10 to 2^1
353 		 * There are less than 256 points, for optimization
354 		 */
355 		seg_distr[0] = 3;
356 		seg_distr[1] = 4;
357 		seg_distr[2] = 4;
358 		seg_distr[3] = 4;
359 		seg_distr[4] = 4;
360 		seg_distr[5] = 4;
361 		seg_distr[6] = 4;
362 		seg_distr[7] = 4;
363 		seg_distr[8] = 4;
364 		seg_distr[9] = 4;
365 		seg_distr[10] = 1;
366 
367 		region_start = -10;
368 		region_end = 1;
369 	}
370 
371 	for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
372 		seg_distr[i] = -1;
373 
374 	for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
375 		if (seg_distr[k] != -1)
376 			hw_points += (1 << seg_distr[k]);
377 	}
378 
379 	j = 0;
380 	for (k = 0; k < (region_end - region_start); k++) {
381 		increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
382 		start_index = (region_start + k + MAX_LOW_POINT) *
383 				NUMBER_SW_SEGMENTS;
384 		for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
385 				i += increment) {
386 			if (j == hw_points - 1)
387 				break;
388 			rgb_resulted[j].red = output_tf->tf_pts.red[i];
389 			rgb_resulted[j].green = output_tf->tf_pts.green[i];
390 			rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
391 			j++;
392 		}
393 	}
394 
395 	/* last point */
396 	start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
397 	rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
398 	rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
399 	rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
400 
401 	rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
402 	rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
403 	rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
404 
405 	// All 3 color channels have same x
406 	corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
407 					     dc_fixpt_from_int(region_start));
408 	corner_points[0].green.x = corner_points[0].red.x;
409 	corner_points[0].blue.x = corner_points[0].red.x;
410 
411 	corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
412 					     dc_fixpt_from_int(region_end));
413 	corner_points[1].green.x = corner_points[1].red.x;
414 	corner_points[1].blue.x = corner_points[1].red.x;
415 
416 	corner_points[0].red.y = rgb_resulted[0].red;
417 	corner_points[0].green.y = rgb_resulted[0].green;
418 	corner_points[0].blue.y = rgb_resulted[0].blue;
419 
420 	corner_points[0].red.slope = dc_fixpt_div(corner_points[0].red.y,
421 			corner_points[0].red.x);
422 	corner_points[0].green.slope = dc_fixpt_div(corner_points[0].green.y,
423 			corner_points[0].green.x);
424 	corner_points[0].blue.slope = dc_fixpt_div(corner_points[0].blue.y,
425 			corner_points[0].blue.x);
426 
427 	/* see comment above, m_arrPoints[1].y should be the Y value for the
428 	 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
429 	 */
430 	corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
431 	corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
432 	corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
433 	corner_points[1].red.slope = dc_fixpt_zero;
434 	corner_points[1].green.slope = dc_fixpt_zero;
435 	corner_points[1].blue.slope = dc_fixpt_zero;
436 
437 	if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
438 		/* for PQ, we want to have a straight line from last HW X point,
439 		 * and the slope to be such that we hit 1.0 at 10000 nits.
440 		 */
441 		const struct fixed31_32 end_value =
442 				dc_fixpt_from_int(125);
443 
444 		corner_points[1].red.slope = dc_fixpt_div(
445 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
446 			dc_fixpt_sub(end_value, corner_points[1].red.x));
447 		corner_points[1].green.slope = dc_fixpt_div(
448 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
449 			dc_fixpt_sub(end_value, corner_points[1].green.x));
450 		corner_points[1].blue.slope = dc_fixpt_div(
451 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
452 			dc_fixpt_sub(end_value, corner_points[1].blue.x));
453 	}
454 
455 	lut_params->hw_points_num = hw_points;
456 
457 	k = 0;
458 	for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
459 		if (seg_distr[k] != -1) {
460 			lut_params->arr_curve_points[k].segments_num =
461 					seg_distr[k];
462 			lut_params->arr_curve_points[i].offset =
463 					lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
464 		}
465 		k++;
466 	}
467 
468 	if (seg_distr[k] != -1)
469 		lut_params->arr_curve_points[k].segments_num = seg_distr[k];
470 
471 	rgb = rgb_resulted;
472 	rgb_plus_1 = rgb_resulted + 1;
473 
474 	i = 1;
475 	while (i != hw_points + 1) {
476 		rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
477 		rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
478 		rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
479 
480 		if (fixpoint == true) {
481 			rgb->delta_red_reg   = dc_fixpt_clamp_u0d10(rgb->delta_red);
482 			rgb->delta_green_reg = dc_fixpt_clamp_u0d10(rgb->delta_green);
483 			rgb->delta_blue_reg  = dc_fixpt_clamp_u0d10(rgb->delta_blue);
484 			rgb->red_reg         = dc_fixpt_clamp_u0d14(rgb->red);
485 			rgb->green_reg       = dc_fixpt_clamp_u0d14(rgb->green);
486 			rgb->blue_reg        = dc_fixpt_clamp_u0d14(rgb->blue);
487 		}
488 
489 		++rgb_plus_1;
490 		++rgb;
491 		++i;
492 	}
493 	cm_helper_convert_to_custom_float(rgb_resulted,
494 						lut_params->corner_points,
495 						hw_points, fixpoint);
496 
497 	return true;
498 }
499 
500 #define NUM_DEGAMMA_REGIONS    12
501 
502 
cm_helper_translate_curve_to_degamma_hw_format(const struct dc_transfer_func * output_tf,struct pwl_params * lut_params)503 bool cm_helper_translate_curve_to_degamma_hw_format(
504 				const struct dc_transfer_func *output_tf,
505 				struct pwl_params *lut_params)
506 {
507 	struct curve_points3 *corner_points;
508 	struct pwl_result_data *rgb_resulted;
509 	struct pwl_result_data *rgb;
510 	struct pwl_result_data *rgb_plus_1;
511 
512 	int32_t region_start, region_end;
513 	int32_t i;
514 	uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
515 
516 	if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
517 		return false;
518 
519 	PERF_TRACE_CTX(output_tf->ctx);
520 
521 	corner_points = lut_params->corner_points;
522 	rgb_resulted = lut_params->rgb_resulted;
523 	hw_points = 0;
524 
525 	memset(lut_params, 0, sizeof(struct pwl_params));
526 	memset(seg_distr, 0, sizeof(seg_distr));
527 
528 	region_start = -NUM_DEGAMMA_REGIONS;
529 	region_end   = 0;
530 
531 
532 	for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
533 		seg_distr[i] = -1;
534 	/* 12 segments
535 	 * segments are from 2^-12 to 0
536 	 */
537 	for (i = 0; i < NUM_DEGAMMA_REGIONS ; i++)
538 		seg_distr[i] = 4;
539 
540 	for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
541 		if (seg_distr[k] != -1)
542 			hw_points += (1 << seg_distr[k]);
543 	}
544 
545 	j = 0;
546 	for (k = 0; k < (region_end - region_start); k++) {
547 		increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
548 		start_index = (region_start + k + MAX_LOW_POINT) *
549 				NUMBER_SW_SEGMENTS;
550 		for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
551 				i += increment) {
552 			if (j == hw_points - 1)
553 				break;
554 			rgb_resulted[j].red = output_tf->tf_pts.red[i];
555 			rgb_resulted[j].green = output_tf->tf_pts.green[i];
556 			rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
557 			j++;
558 		}
559 	}
560 
561 	/* last point */
562 	start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
563 	rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
564 	rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
565 	rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
566 
567 	rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
568 	rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
569 	rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
570 
571 	corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
572 					     dc_fixpt_from_int(region_start));
573 	corner_points[0].green.x = corner_points[0].red.x;
574 	corner_points[0].blue.x = corner_points[0].red.x;
575 	corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
576 					     dc_fixpt_from_int(region_end));
577 	corner_points[1].green.x = corner_points[1].red.x;
578 	corner_points[1].blue.x = corner_points[1].red.x;
579 
580 	corner_points[0].red.y = rgb_resulted[0].red;
581 	corner_points[0].green.y = rgb_resulted[0].green;
582 	corner_points[0].blue.y = rgb_resulted[0].blue;
583 
584 	/* see comment above, m_arrPoints[1].y should be the Y value for the
585 	 * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
586 	 */
587 	corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
588 	corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
589 	corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
590 	corner_points[1].red.slope = dc_fixpt_zero;
591 	corner_points[1].green.slope = dc_fixpt_zero;
592 	corner_points[1].blue.slope = dc_fixpt_zero;
593 
594 	if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
595 		/* for PQ, we want to have a straight line from last HW X point,
596 		 * and the slope to be such that we hit 1.0 at 10000 nits.
597 		 */
598 		const struct fixed31_32 end_value =
599 				dc_fixpt_from_int(125);
600 
601 		corner_points[1].red.slope = dc_fixpt_div(
602 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
603 			dc_fixpt_sub(end_value, corner_points[1].red.x));
604 		corner_points[1].green.slope = dc_fixpt_div(
605 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
606 			dc_fixpt_sub(end_value, corner_points[1].green.x));
607 		corner_points[1].blue.slope = dc_fixpt_div(
608 			dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
609 			dc_fixpt_sub(end_value, corner_points[1].blue.x));
610 	}
611 
612 	lut_params->hw_points_num = hw_points;
613 
614 	k = 0;
615 	for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
616 		if (seg_distr[k] != -1) {
617 			lut_params->arr_curve_points[k].segments_num =
618 					seg_distr[k];
619 			lut_params->arr_curve_points[i].offset =
620 					lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
621 		}
622 		k++;
623 	}
624 
625 	if (seg_distr[k] != -1)
626 		lut_params->arr_curve_points[k].segments_num = seg_distr[k];
627 
628 	rgb = rgb_resulted;
629 	rgb_plus_1 = rgb_resulted + 1;
630 
631 	i = 1;
632 	while (i != hw_points + 1) {
633 		rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
634 		rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
635 		rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
636 
637 		++rgb_plus_1;
638 		++rgb;
639 		++i;
640 	}
641 	cm_helper_convert_to_custom_float(rgb_resulted,
642 						lut_params->corner_points,
643 						hw_points, false);
644 
645 	return true;
646 }
647