drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.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 #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
  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
  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
 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
 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
 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 }