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/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_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
  85 void 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
 148 bool 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(corner_points[0].red.x, &fmt,
 168                                 &corner_points[0].red.custom_float_x)) {
 169                 BREAK_TO_DEBUGGER();
 170                 return false;
 171         }
 172         if (!convert_to_custom_float_format(corner_points[0].green.x, &fmt,
 173                                 &corner_points[0].green.custom_float_x)) {
 174                 BREAK_TO_DEBUGGER();
 175                 return false;
 176         }
 177         if (!convert_to_custom_float_format(corner_points[0].blue.x, &fmt,
 178                                 &corner_points[0].blue.custom_float_x)) {
 179                 BREAK_TO_DEBUGGER();
 180                 return false;
 181         }
 182
 183         if (!convert_to_custom_float_format(corner_points[0].red.offset, &fmt,
 184                                 &corner_points[0].red.custom_float_offset)) {
 185                 BREAK_TO_DEBUGGER();
 186                 return false;
 187         }
 188         if (!convert_to_custom_float_format(corner_points[0].green.offset, &fmt,
 189                                 &corner_points[0].green.custom_float_offset)) {
 190                 BREAK_TO_DEBUGGER();
 191                 return false;
 192         }
 193         if (!convert_to_custom_float_format(corner_points[0].blue.offset, &fmt,
 194                                 &corner_points[0].blue.custom_float_offset)) {
 195                 BREAK_TO_DEBUGGER();
 196                 return false;
 197         }
 198
 199         if (!convert_to_custom_float_format(corner_points[0].red.slope, &fmt,
 200                                 &corner_points[0].red.custom_float_slope)) {
 201                 BREAK_TO_DEBUGGER();
 202                 return false;
 203         }
 204         if (!convert_to_custom_float_format(corner_points[0].green.slope, &fmt,
 205                                 &corner_points[0].green.custom_float_slope)) {
 206                 BREAK_TO_DEBUGGER();
 207                 return false;
 208         }
 209         if (!convert_to_custom_float_format(corner_points[0].blue.slope, &fmt,
 210                                 &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(corner_points[1].red.x, &fmt,
 219                                 &corner_points[1].red.custom_float_x)) {
 220                 BREAK_TO_DEBUGGER();
 221                 return false;
 222         }
 223         if (!convert_to_custom_float_format(corner_points[1].green.x, &fmt,
 224                                 &corner_points[1].green.custom_float_x)) {
 225                 BREAK_TO_DEBUGGER();
 226                 return false;
 227         }
 228         if (!convert_to_custom_float_format(corner_points[1].blue.x, &fmt,
 229                                 &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(corner_points[1].red.y);
 237                 corner_points[1].green.custom_float_y =
 238                                 dc_fixpt_clamp_u0d14(corner_points[1].green.y);
 239                 corner_points[1].blue.custom_float_y =
 240                                 dc_fixpt_clamp_u0d14(corner_points[1].blue.y);
 241         } else {
 242                 if (!convert_to_custom_float_format(corner_points[1].red.y,
 243                                 &fmt, &corner_points[1].red.custom_float_y)) {
 244                         BREAK_TO_DEBUGGER();
 245                         return false;
 246                 }
 247                 if (!convert_to_custom_float_format(corner_points[1].green.y,
 248                                 &fmt, &corner_points[1].green.custom_float_y)) {
 249                         BREAK_TO_DEBUGGER();
 250                         return false;
 251                 }
 252                 if (!convert_to_custom_float_format(corner_points[1].blue.y,
 253                                 &fmt, &corner_points[1].blue.custom_float_y)) {
 254                         BREAK_TO_DEBUGGER();
 255                         return false;
 256                 }
 257         }
 258
 259         if (!convert_to_custom_float_format(corner_points[1].red.slope, &fmt,
 260                                 &corner_points[1].red.custom_float_slope)) {
 261                 BREAK_TO_DEBUGGER();
 262                 return false;
 263         }
 264         if (!convert_to_custom_float_format(corner_points[1].green.slope, &fmt,
 265                                 &corner_points[1].green.custom_float_slope)) {
 266                 BREAK_TO_DEBUGGER();
 267                 return false;
 268         }
 269         if (!convert_to_custom_float_format(corner_points[1].blue.slope, &fmt,
 270                                 &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(rgb->red, &fmt,
 283                                                     &rgb->red_reg)) {
 284                         BREAK_TO_DEBUGGER();
 285                         return false;
 286                 }
 287
 288                 if (!convert_to_custom_float_format(rgb->green, &fmt,
 289                                                     &rgb->green_reg)) {
 290                         BREAK_TO_DEBUGGER();
 291                         return false;
 292                 }
 293
 294                 if (!convert_to_custom_float_format(rgb->blue, &fmt,
 295                                                     &rgb->blue_reg)) {
 296                         BREAK_TO_DEBUGGER();
 297                         return false;
 298                 }
 299
 300                 if (!convert_to_custom_float_format(rgb->delta_red, &fmt,
 301                                                     &rgb->delta_red_reg)) {
 302                         BREAK_TO_DEBUGGER();
 303                         return false;
 304                 }
 305
 306                 if (!convert_to_custom_float_format(rgb->delta_green, &fmt,
 307                                                     &rgb->delta_green_reg)) {
 308                         BREAK_TO_DEBUGGER();
 309                         return false;
 310                 }
 311
 312                 if (!convert_to_custom_float_format(rgb->delta_blue, &fmt,
 313                                                     &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
 334 bool 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                 /* 13 segments
 369                  * segment is from 2^-12 to 2^0
 370                  * There are less than 256 points, for optimization
 371                  */
 372                 const uint8_t SEG_COUNT = 12;
 373
 374                 for (i = 0; i < SEG_COUNT; i++)
 375                         seg_distr[i] = 4;
 376
 377                 seg_distr[SEG_COUNT] = 1;
 378
 379                 region_start = -SEG_COUNT;
 380                 region_end = 1;
 381         }
 382
 383         for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
 384                 seg_distr[i] = -1;
 385
 386         for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
 387                 if (seg_distr[k] != -1)
 388                         hw_points += (1 << seg_distr[k]);
 389         }
 390
 391         j = 0;
 392         for (k = 0; k < (region_end - region_start); k++) {
 393                 increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
 394                 start_index = (region_start + k + MAX_LOW_POINT) *
 395                                 NUMBER_SW_SEGMENTS;
 396                 for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
 397                                 i += increment) {
 398                         if (j == hw_points - 1)
 399                                 break;
 400                         if (i >= TRANSFER_FUNC_POINTS) {
 401                                 DC_LOG_ERROR("Index out of bounds: i=%d, TRANSFER_FUNC_POINTS=%d\n",
 402                                              i, TRANSFER_FUNC_POINTS);
 403                                 return false;
 404                         }
 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(dc_fixpt_from_int(2),
 424                                              dc_fixpt_from_int(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(dc_fixpt_from_int(2),
 429                                              dc_fixpt_from_int(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(corner_points[0].red.y,
 438                         corner_points[0].red.x);
 439         corner_points[0].green.slope = dc_fixpt_div(corner_points[0].green.y,
 440                         corner_points[0].green.x);
 441         corner_points[0].blue.slope = dc_fixpt_div(corner_points[0].blue.y,
 442                         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(125);
 460
 461                 corner_points[1].red.slope = dc_fixpt_div(
 462                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
 463                         dc_fixpt_sub(end_value, corner_points[1].red.x));
 464                 corner_points[1].green.slope = dc_fixpt_div(
 465                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
 466                         dc_fixpt_sub(end_value, corner_points[1].green.x));
 467                 corner_points[1].blue.slope = dc_fixpt_div(
 468                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
 469                         dc_fixpt_sub(end_value, 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(rgb_plus_1->red, rgb->red))
 497                                 rgb_plus_1->red = dc_fixpt_add(rgb->red, rgb_minus_1->delta_red);
 498                         if (dc_fixpt_lt(rgb_plus_1->green, rgb->green))
 499                                 rgb_plus_1->green = dc_fixpt_add(rgb->green, rgb_minus_1->delta_green);
 500                         if (dc_fixpt_lt(rgb_plus_1->blue, rgb->blue))
 501                                 rgb_plus_1->blue = dc_fixpt_add(rgb->blue, rgb_minus_1->delta_blue);
 502                 }
 503
 504                 rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
 505                 rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
 506                 rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
 507
 508
 509                 if (fixpoint == true) {
 510                         uint32_t red_clamp = dc_fixpt_clamp_u0d14(rgb->delta_red);
 511                         uint32_t green_clamp = dc_fixpt_clamp_u0d14(rgb->delta_green);
 512                         uint32_t blue_clamp = dc_fixpt_clamp_u0d14(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(rgb->red);
 521                         rgb->green_reg       = dc_fixpt_clamp_u0d14(rgb->green);
 522                         rgb->blue_reg        = dc_fixpt_clamp_u0d14(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                                                 lut_params->corner_points,
 532                                                 hw_points, fixpoint);
 533
 534         return true;
 535 }
 536
 537 #define NUM_DEGAMMA_REGIONS    12
 538
 539
 540 bool 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                         if (i >= TRANSFER_FUNC_POINTS)
 590                                 return false;
 591                         rgb_resulted[j].red = output_tf->tf_pts.red[i];
 592                         rgb_resulted[j].green = output_tf->tf_pts.green[i];
 593                         rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
 594                         j++;
 595                 }
 596         }
 597
 598         /* last point */
 599         start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
 600         rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
 601         rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
 602         rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
 603
 604         rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
 605         rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
 606         rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
 607
 608         corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
 609                                              dc_fixpt_from_int(region_start));
 610         corner_points[0].green.x = corner_points[0].red.x;
 611         corner_points[0].blue.x = corner_points[0].red.x;
 612         corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
 613                                              dc_fixpt_from_int(region_end));
 614         corner_points[1].green.x = corner_points[1].red.x;
 615         corner_points[1].blue.x = corner_points[1].red.x;
 616
 617         corner_points[0].red.y = rgb_resulted[0].red;
 618         corner_points[0].green.y = rgb_resulted[0].green;
 619         corner_points[0].blue.y = rgb_resulted[0].blue;
 620
 621         /* see comment above, m_arrPoints[1].y should be the Y value for the
 622          * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
 623          */
 624         corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
 625         corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
 626         corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
 627         corner_points[1].red.slope = dc_fixpt_zero;
 628         corner_points[1].green.slope = dc_fixpt_zero;
 629         corner_points[1].blue.slope = dc_fixpt_zero;
 630
 631         if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
 632                 /* for PQ, we want to have a straight line from last HW X point,
 633                  * and the slope to be such that we hit 1.0 at 10000 nits.
 634                  */
 635                 const struct fixed31_32 end_value =
 636                                 dc_fixpt_from_int(125);
 637
 638                 corner_points[1].red.slope = dc_fixpt_div(
 639                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
 640                         dc_fixpt_sub(end_value, corner_points[1].red.x));
 641                 corner_points[1].green.slope = dc_fixpt_div(
 642                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
 643                         dc_fixpt_sub(end_value, corner_points[1].green.x));
 644                 corner_points[1].blue.slope = dc_fixpt_div(
 645                         dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
 646                         dc_fixpt_sub(end_value, corner_points[1].blue.x));
 647         }
 648
 649         lut_params->hw_points_num = hw_points;
 650
 651         k = 0;
 652         for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
 653                 if (seg_distr[k] != -1) {
 654                         lut_params->arr_curve_points[k].segments_num =
 655                                         seg_distr[k];
 656                         lut_params->arr_curve_points[i].offset =
 657                                         lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
 658                 }
 659                 k++;
 660         }
 661
 662         if (seg_distr[k] != -1)
 663                 lut_params->arr_curve_points[k].segments_num = seg_distr[k];
 664
 665         rgb = rgb_resulted;
 666         rgb_plus_1 = rgb_resulted + 1;
 667
 668         i = 1;
 669         while (i != hw_points + 1) {
 670                 rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
 671                 rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
 672                 rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
 673
 674                 ++rgb_plus_1;
 675                 ++rgb;
 676                 ++i;
 677         }
 678         cm_helper_convert_to_custom_float(rgb_resulted,
 679                                                 lut_params->corner_points,
 680                                                 hw_points, false);
 681
 682         return true;
 683 }