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0001 /*
0002  * Copyright 2016 Advanced Micro Devices, Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: AMD
0023  *
0024  */
0025 #include "dc.h"
0026 #include "reg_helper.h"
0027 #include "dcn10_dpp.h"
0028 
0029 #include "dcn10_cm_common.h"
0030 #include "custom_float.h"
0031 
0032 #define REG(reg) reg
0033 
0034 #define CTX \
0035     ctx
0036 
0037 #undef FN
0038 #define FN(reg_name, field_name) \
0039     reg->shifts.field_name, reg->masks.field_name
0040 
0041 void cm_helper_program_color_matrices(
0042         struct dc_context *ctx,
0043         const uint16_t *regval,
0044         const struct color_matrices_reg *reg)
0045 {
0046     uint32_t cur_csc_reg;
0047     unsigned int i = 0;
0048 
0049     for (cur_csc_reg = reg->csc_c11_c12;
0050             cur_csc_reg <= reg->csc_c33_c34;
0051             cur_csc_reg++) {
0052 
0053         const uint16_t *regval0 = &(regval[2 * i]);
0054         const uint16_t *regval1 = &(regval[(2 * i) + 1]);
0055 
0056         REG_SET_2(cur_csc_reg, 0,
0057                 csc_c11, *regval0,
0058                 csc_c12, *regval1);
0059 
0060         i++;
0061     }
0062 
0063 }
0064 
0065 void cm_helper_program_xfer_func(
0066         struct dc_context *ctx,
0067         const struct pwl_params *params,
0068         const struct xfer_func_reg *reg)
0069 {
0070     uint32_t reg_region_cur;
0071     unsigned int i = 0;
0072 
0073     REG_SET_2(reg->start_cntl_b, 0,
0074             exp_region_start, params->corner_points[0].blue.custom_float_x,
0075             exp_resion_start_segment, 0);
0076     REG_SET_2(reg->start_cntl_g, 0,
0077             exp_region_start, params->corner_points[0].green.custom_float_x,
0078             exp_resion_start_segment, 0);
0079     REG_SET_2(reg->start_cntl_r, 0,
0080             exp_region_start, params->corner_points[0].red.custom_float_x,
0081             exp_resion_start_segment, 0);
0082 
0083     REG_SET(reg->start_slope_cntl_b, 0,
0084             field_region_linear_slope, params->corner_points[0].blue.custom_float_slope);
0085     REG_SET(reg->start_slope_cntl_g, 0,
0086             field_region_linear_slope, params->corner_points[0].green.custom_float_slope);
0087     REG_SET(reg->start_slope_cntl_r, 0,
0088             field_region_linear_slope, params->corner_points[0].red.custom_float_slope);
0089 
0090     REG_SET(reg->start_end_cntl1_b, 0,
0091             field_region_end, params->corner_points[1].blue.custom_float_x);
0092     REG_SET_2(reg->start_end_cntl2_b, 0,
0093             field_region_end_slope, params->corner_points[1].blue.custom_float_slope,
0094             field_region_end_base, params->corner_points[1].blue.custom_float_y);
0095 
0096     REG_SET(reg->start_end_cntl1_g, 0,
0097             field_region_end, params->corner_points[1].green.custom_float_x);
0098     REG_SET_2(reg->start_end_cntl2_g, 0,
0099             field_region_end_slope, params->corner_points[1].green.custom_float_slope,
0100         field_region_end_base, params->corner_points[1].green.custom_float_y);
0101 
0102     REG_SET(reg->start_end_cntl1_r, 0,
0103             field_region_end, params->corner_points[1].red.custom_float_x);
0104     REG_SET_2(reg->start_end_cntl2_r, 0,
0105             field_region_end_slope, params->corner_points[1].red.custom_float_slope,
0106         field_region_end_base, params->corner_points[1].red.custom_float_y);
0107 
0108     for (reg_region_cur = reg->region_start;
0109             reg_region_cur <= reg->region_end;
0110             reg_region_cur++) {
0111 
0112         const struct gamma_curve *curve0 = &(params->arr_curve_points[2 * i]);
0113         const struct gamma_curve *curve1 = &(params->arr_curve_points[(2 * i) + 1]);
0114 
0115         REG_SET_4(reg_region_cur, 0,
0116                 exp_region0_lut_offset, curve0->offset,
0117                 exp_region0_num_segments, curve0->segments_num,
0118                 exp_region1_lut_offset, curve1->offset,
0119                 exp_region1_num_segments, curve1->segments_num);
0120 
0121         i++;
0122     }
0123 
0124 }
0125 
0126 
0127 
0128 bool cm_helper_convert_to_custom_float(
0129         struct pwl_result_data *rgb_resulted,
0130         struct curve_points3 *corner_points,
0131         uint32_t hw_points_num,
0132         bool fixpoint)
0133 {
0134     struct custom_float_format fmt;
0135 
0136     struct pwl_result_data *rgb = rgb_resulted;
0137 
0138     uint32_t i = 0;
0139 
0140     fmt.exponenta_bits = 6;
0141     fmt.mantissa_bits = 12;
0142     fmt.sign = false;
0143 
0144     /* corner_points[0] - beginning base, slope offset for R,G,B
0145      * corner_points[1] - end base, slope offset for R,G,B
0146      */
0147     if (!convert_to_custom_float_format(corner_points[0].red.x, &fmt,
0148                 &corner_points[0].red.custom_float_x)) {
0149         BREAK_TO_DEBUGGER();
0150         return false;
0151     }
0152     if (!convert_to_custom_float_format(corner_points[0].green.x, &fmt,
0153                 &corner_points[0].green.custom_float_x)) {
0154         BREAK_TO_DEBUGGER();
0155         return false;
0156     }
0157     if (!convert_to_custom_float_format(corner_points[0].blue.x, &fmt,
0158                 &corner_points[0].blue.custom_float_x)) {
0159         BREAK_TO_DEBUGGER();
0160         return false;
0161     }
0162 
0163     if (!convert_to_custom_float_format(corner_points[0].red.offset, &fmt,
0164                 &corner_points[0].red.custom_float_offset)) {
0165         BREAK_TO_DEBUGGER();
0166         return false;
0167     }
0168     if (!convert_to_custom_float_format(corner_points[0].green.offset, &fmt,
0169                 &corner_points[0].green.custom_float_offset)) {
0170         BREAK_TO_DEBUGGER();
0171         return false;
0172     }
0173     if (!convert_to_custom_float_format(corner_points[0].blue.offset, &fmt,
0174                 &corner_points[0].blue.custom_float_offset)) {
0175         BREAK_TO_DEBUGGER();
0176         return false;
0177     }
0178 
0179     if (!convert_to_custom_float_format(corner_points[0].red.slope, &fmt,
0180                 &corner_points[0].red.custom_float_slope)) {
0181         BREAK_TO_DEBUGGER();
0182         return false;
0183     }
0184     if (!convert_to_custom_float_format(corner_points[0].green.slope, &fmt,
0185                 &corner_points[0].green.custom_float_slope)) {
0186         BREAK_TO_DEBUGGER();
0187         return false;
0188     }
0189     if (!convert_to_custom_float_format(corner_points[0].blue.slope, &fmt,
0190                 &corner_points[0].blue.custom_float_slope)) {
0191         BREAK_TO_DEBUGGER();
0192         return false;
0193     }
0194 
0195     fmt.mantissa_bits = 10;
0196     fmt.sign = false;
0197 
0198     if (!convert_to_custom_float_format(corner_points[1].red.x, &fmt,
0199                 &corner_points[1].red.custom_float_x)) {
0200         BREAK_TO_DEBUGGER();
0201         return false;
0202     }
0203     if (!convert_to_custom_float_format(corner_points[1].green.x, &fmt,
0204                 &corner_points[1].green.custom_float_x)) {
0205         BREAK_TO_DEBUGGER();
0206         return false;
0207     }
0208     if (!convert_to_custom_float_format(corner_points[1].blue.x, &fmt,
0209                 &corner_points[1].blue.custom_float_x)) {
0210         BREAK_TO_DEBUGGER();
0211         return false;
0212     }
0213 
0214     if (fixpoint == true) {
0215         corner_points[1].red.custom_float_y =
0216                 dc_fixpt_clamp_u0d14(corner_points[1].red.y);
0217         corner_points[1].green.custom_float_y =
0218                 dc_fixpt_clamp_u0d14(corner_points[1].green.y);
0219         corner_points[1].blue.custom_float_y =
0220                 dc_fixpt_clamp_u0d14(corner_points[1].blue.y);
0221     } else {
0222         if (!convert_to_custom_float_format(corner_points[1].red.y,
0223                 &fmt, &corner_points[1].red.custom_float_y)) {
0224             BREAK_TO_DEBUGGER();
0225             return false;
0226         }
0227         if (!convert_to_custom_float_format(corner_points[1].green.y,
0228                 &fmt, &corner_points[1].green.custom_float_y)) {
0229             BREAK_TO_DEBUGGER();
0230             return false;
0231         }
0232         if (!convert_to_custom_float_format(corner_points[1].blue.y,
0233                 &fmt, &corner_points[1].blue.custom_float_y)) {
0234             BREAK_TO_DEBUGGER();
0235             return false;
0236         }
0237     }
0238 
0239     if (!convert_to_custom_float_format(corner_points[1].red.slope, &fmt,
0240                 &corner_points[1].red.custom_float_slope)) {
0241         BREAK_TO_DEBUGGER();
0242         return false;
0243     }
0244     if (!convert_to_custom_float_format(corner_points[1].green.slope, &fmt,
0245                 &corner_points[1].green.custom_float_slope)) {
0246         BREAK_TO_DEBUGGER();
0247         return false;
0248     }
0249     if (!convert_to_custom_float_format(corner_points[1].blue.slope, &fmt,
0250                 &corner_points[1].blue.custom_float_slope)) {
0251         BREAK_TO_DEBUGGER();
0252         return false;
0253     }
0254 
0255     if (hw_points_num == 0 || rgb_resulted == NULL || fixpoint == true)
0256         return true;
0257 
0258     fmt.mantissa_bits = 12;
0259     fmt.sign = true;
0260 
0261     while (i != hw_points_num) {
0262         if (!convert_to_custom_float_format(rgb->red, &fmt,
0263                             &rgb->red_reg)) {
0264             BREAK_TO_DEBUGGER();
0265             return false;
0266         }
0267 
0268         if (!convert_to_custom_float_format(rgb->green, &fmt,
0269                             &rgb->green_reg)) {
0270             BREAK_TO_DEBUGGER();
0271             return false;
0272         }
0273 
0274         if (!convert_to_custom_float_format(rgb->blue, &fmt,
0275                             &rgb->blue_reg)) {
0276             BREAK_TO_DEBUGGER();
0277             return false;
0278         }
0279 
0280         if (!convert_to_custom_float_format(rgb->delta_red, &fmt,
0281                             &rgb->delta_red_reg)) {
0282             BREAK_TO_DEBUGGER();
0283             return false;
0284         }
0285 
0286         if (!convert_to_custom_float_format(rgb->delta_green, &fmt,
0287                             &rgb->delta_green_reg)) {
0288             BREAK_TO_DEBUGGER();
0289             return false;
0290         }
0291 
0292         if (!convert_to_custom_float_format(rgb->delta_blue, &fmt,
0293                             &rgb->delta_blue_reg)) {
0294             BREAK_TO_DEBUGGER();
0295             return false;
0296         }
0297 
0298         ++rgb;
0299         ++i;
0300     }
0301 
0302     return true;
0303 }
0304 
0305 /* driver uses 32 regions or less, but DCN HW has 34, extra 2 are set to 0 */
0306 #define MAX_REGIONS_NUMBER 34
0307 #define MAX_LOW_POINT      25
0308 #define NUMBER_REGIONS     32
0309 #define NUMBER_SW_SEGMENTS 16
0310 
0311 bool cm_helper_translate_curve_to_hw_format(
0312                 const struct dc_transfer_func *output_tf,
0313                 struct pwl_params *lut_params, bool fixpoint)
0314 {
0315     struct curve_points3 *corner_points;
0316     struct pwl_result_data *rgb_resulted;
0317     struct pwl_result_data *rgb;
0318     struct pwl_result_data *rgb_plus_1;
0319     struct pwl_result_data *rgb_minus_1;
0320 
0321     int32_t region_start, region_end;
0322     int32_t i;
0323     uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
0324 
0325     if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
0326         return false;
0327 
0328     corner_points = lut_params->corner_points;
0329     rgb_resulted = lut_params->rgb_resulted;
0330     hw_points = 0;
0331 
0332     memset(lut_params, 0, sizeof(struct pwl_params));
0333     memset(seg_distr, 0, sizeof(seg_distr));
0334 
0335     if (output_tf->tf == TRANSFER_FUNCTION_PQ || output_tf->tf == TRANSFER_FUNCTION_GAMMA22) {
0336         /* 32 segments
0337          * segments are from 2^-25 to 2^7
0338          */
0339         for (i = 0; i < NUMBER_REGIONS ; i++)
0340             seg_distr[i] = 3;
0341 
0342         region_start = -MAX_LOW_POINT;
0343         region_end   = NUMBER_REGIONS - MAX_LOW_POINT;
0344     } else {
0345         /* 11 segments
0346          * segment is from 2^-10 to 2^1
0347          * There are less than 256 points, for optimization
0348          */
0349         seg_distr[0] = 3;
0350         seg_distr[1] = 4;
0351         seg_distr[2] = 4;
0352         seg_distr[3] = 4;
0353         seg_distr[4] = 4;
0354         seg_distr[5] = 4;
0355         seg_distr[6] = 4;
0356         seg_distr[7] = 4;
0357         seg_distr[8] = 4;
0358         seg_distr[9] = 4;
0359         seg_distr[10] = 1;
0360 
0361         region_start = -10;
0362         region_end = 1;
0363     }
0364 
0365     for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
0366         seg_distr[i] = -1;
0367 
0368     for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
0369         if (seg_distr[k] != -1)
0370             hw_points += (1 << seg_distr[k]);
0371     }
0372 
0373     j = 0;
0374     for (k = 0; k < (region_end - region_start); k++) {
0375         increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
0376         start_index = (region_start + k + MAX_LOW_POINT) *
0377                 NUMBER_SW_SEGMENTS;
0378         for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
0379                 i += increment) {
0380             if (j == hw_points - 1)
0381                 break;
0382             rgb_resulted[j].red = output_tf->tf_pts.red[i];
0383             rgb_resulted[j].green = output_tf->tf_pts.green[i];
0384             rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
0385             j++;
0386         }
0387     }
0388 
0389     /* last point */
0390     start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
0391     rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
0392     rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
0393     rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
0394 
0395     rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
0396     rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
0397     rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
0398 
0399     // All 3 color channels have same x
0400     corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
0401                          dc_fixpt_from_int(region_start));
0402     corner_points[0].green.x = corner_points[0].red.x;
0403     corner_points[0].blue.x = corner_points[0].red.x;
0404 
0405     corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
0406                          dc_fixpt_from_int(region_end));
0407     corner_points[1].green.x = corner_points[1].red.x;
0408     corner_points[1].blue.x = corner_points[1].red.x;
0409 
0410     corner_points[0].red.y = rgb_resulted[0].red;
0411     corner_points[0].green.y = rgb_resulted[0].green;
0412     corner_points[0].blue.y = rgb_resulted[0].blue;
0413 
0414     corner_points[0].red.slope = dc_fixpt_div(corner_points[0].red.y,
0415             corner_points[0].red.x);
0416     corner_points[0].green.slope = dc_fixpt_div(corner_points[0].green.y,
0417             corner_points[0].green.x);
0418     corner_points[0].blue.slope = dc_fixpt_div(corner_points[0].blue.y,
0419             corner_points[0].blue.x);
0420 
0421     /* see comment above, m_arrPoints[1].y should be the Y value for the
0422      * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
0423      */
0424     corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
0425     corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
0426     corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
0427     corner_points[1].red.slope = dc_fixpt_zero;
0428     corner_points[1].green.slope = dc_fixpt_zero;
0429     corner_points[1].blue.slope = dc_fixpt_zero;
0430 
0431     if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
0432         /* for PQ, we want to have a straight line from last HW X point,
0433          * and the slope to be such that we hit 1.0 at 10000 nits.
0434          */
0435         const struct fixed31_32 end_value =
0436                 dc_fixpt_from_int(125);
0437 
0438         corner_points[1].red.slope = dc_fixpt_div(
0439             dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
0440             dc_fixpt_sub(end_value, corner_points[1].red.x));
0441         corner_points[1].green.slope = dc_fixpt_div(
0442             dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
0443             dc_fixpt_sub(end_value, corner_points[1].green.x));
0444         corner_points[1].blue.slope = dc_fixpt_div(
0445             dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
0446             dc_fixpt_sub(end_value, corner_points[1].blue.x));
0447     }
0448 
0449     lut_params->hw_points_num = hw_points;
0450 
0451     k = 0;
0452     for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
0453         if (seg_distr[k] != -1) {
0454             lut_params->arr_curve_points[k].segments_num =
0455                     seg_distr[k];
0456             lut_params->arr_curve_points[i].offset =
0457                     lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
0458         }
0459         k++;
0460     }
0461 
0462     if (seg_distr[k] != -1)
0463         lut_params->arr_curve_points[k].segments_num = seg_distr[k];
0464 
0465     rgb = rgb_resulted;
0466     rgb_plus_1 = rgb_resulted + 1;
0467     rgb_minus_1 = rgb;
0468 
0469     i = 1;
0470     while (i != hw_points + 1) {
0471 
0472         if (i >= hw_points - 1) {
0473             if (dc_fixpt_lt(rgb_plus_1->red, rgb->red))
0474                 rgb_plus_1->red = dc_fixpt_add(rgb->red, rgb_minus_1->delta_red);
0475             if (dc_fixpt_lt(rgb_plus_1->green, rgb->green))
0476                 rgb_plus_1->green = dc_fixpt_add(rgb->green, rgb_minus_1->delta_green);
0477             if (dc_fixpt_lt(rgb_plus_1->blue, rgb->blue))
0478                 rgb_plus_1->blue = dc_fixpt_add(rgb->blue, rgb_minus_1->delta_blue);
0479         }
0480 
0481         rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
0482         rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
0483         rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
0484 
0485         if (fixpoint == true) {
0486             rgb->delta_red_reg   = dc_fixpt_clamp_u0d10(rgb->delta_red);
0487             rgb->delta_green_reg = dc_fixpt_clamp_u0d10(rgb->delta_green);
0488             rgb->delta_blue_reg  = dc_fixpt_clamp_u0d10(rgb->delta_blue);
0489             rgb->red_reg         = dc_fixpt_clamp_u0d14(rgb->red);
0490             rgb->green_reg       = dc_fixpt_clamp_u0d14(rgb->green);
0491             rgb->blue_reg        = dc_fixpt_clamp_u0d14(rgb->blue);
0492         }
0493 
0494         ++rgb_plus_1;
0495         rgb_minus_1 = rgb;
0496         ++rgb;
0497         ++i;
0498     }
0499     cm_helper_convert_to_custom_float(rgb_resulted,
0500                         lut_params->corner_points,
0501                         hw_points, fixpoint);
0502 
0503     return true;
0504 }
0505 
0506 #define NUM_DEGAMMA_REGIONS    12
0507 
0508 
0509 bool cm_helper_translate_curve_to_degamma_hw_format(
0510                 const struct dc_transfer_func *output_tf,
0511                 struct pwl_params *lut_params)
0512 {
0513     struct curve_points3 *corner_points;
0514     struct pwl_result_data *rgb_resulted;
0515     struct pwl_result_data *rgb;
0516     struct pwl_result_data *rgb_plus_1;
0517 
0518     int32_t region_start, region_end;
0519     int32_t i;
0520     uint32_t j, k, seg_distr[MAX_REGIONS_NUMBER], increment, start_index, hw_points;
0521 
0522     if (output_tf == NULL || lut_params == NULL || output_tf->type == TF_TYPE_BYPASS)
0523         return false;
0524 
0525     corner_points = lut_params->corner_points;
0526     rgb_resulted = lut_params->rgb_resulted;
0527     hw_points = 0;
0528 
0529     memset(lut_params, 0, sizeof(struct pwl_params));
0530     memset(seg_distr, 0, sizeof(seg_distr));
0531 
0532     region_start = -NUM_DEGAMMA_REGIONS;
0533     region_end   = 0;
0534 
0535 
0536     for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)
0537         seg_distr[i] = -1;
0538     /* 12 segments
0539      * segments are from 2^-12 to 0
0540      */
0541     for (i = 0; i < NUM_DEGAMMA_REGIONS ; i++)
0542         seg_distr[i] = 4;
0543 
0544     for (k = 0; k < MAX_REGIONS_NUMBER; k++) {
0545         if (seg_distr[k] != -1)
0546             hw_points += (1 << seg_distr[k]);
0547     }
0548 
0549     j = 0;
0550     for (k = 0; k < (region_end - region_start); k++) {
0551         increment = NUMBER_SW_SEGMENTS / (1 << seg_distr[k]);
0552         start_index = (region_start + k + MAX_LOW_POINT) *
0553                 NUMBER_SW_SEGMENTS;
0554         for (i = start_index; i < start_index + NUMBER_SW_SEGMENTS;
0555                 i += increment) {
0556             if (j == hw_points - 1)
0557                 break;
0558             rgb_resulted[j].red = output_tf->tf_pts.red[i];
0559             rgb_resulted[j].green = output_tf->tf_pts.green[i];
0560             rgb_resulted[j].blue = output_tf->tf_pts.blue[i];
0561             j++;
0562         }
0563     }
0564 
0565     /* last point */
0566     start_index = (region_end + MAX_LOW_POINT) * NUMBER_SW_SEGMENTS;
0567     rgb_resulted[hw_points - 1].red = output_tf->tf_pts.red[start_index];
0568     rgb_resulted[hw_points - 1].green = output_tf->tf_pts.green[start_index];
0569     rgb_resulted[hw_points - 1].blue = output_tf->tf_pts.blue[start_index];
0570 
0571     rgb_resulted[hw_points].red = rgb_resulted[hw_points - 1].red;
0572     rgb_resulted[hw_points].green = rgb_resulted[hw_points - 1].green;
0573     rgb_resulted[hw_points].blue = rgb_resulted[hw_points - 1].blue;
0574 
0575     corner_points[0].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
0576                          dc_fixpt_from_int(region_start));
0577     corner_points[0].green.x = corner_points[0].red.x;
0578     corner_points[0].blue.x = corner_points[0].red.x;
0579     corner_points[1].red.x = dc_fixpt_pow(dc_fixpt_from_int(2),
0580                          dc_fixpt_from_int(region_end));
0581     corner_points[1].green.x = corner_points[1].red.x;
0582     corner_points[1].blue.x = corner_points[1].red.x;
0583 
0584     corner_points[0].red.y = rgb_resulted[0].red;
0585     corner_points[0].green.y = rgb_resulted[0].green;
0586     corner_points[0].blue.y = rgb_resulted[0].blue;
0587 
0588     /* see comment above, m_arrPoints[1].y should be the Y value for the
0589      * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
0590      */
0591     corner_points[1].red.y = rgb_resulted[hw_points - 1].red;
0592     corner_points[1].green.y = rgb_resulted[hw_points - 1].green;
0593     corner_points[1].blue.y = rgb_resulted[hw_points - 1].blue;
0594     corner_points[1].red.slope = dc_fixpt_zero;
0595     corner_points[1].green.slope = dc_fixpt_zero;
0596     corner_points[1].blue.slope = dc_fixpt_zero;
0597 
0598     if (output_tf->tf == TRANSFER_FUNCTION_PQ) {
0599         /* for PQ, we want to have a straight line from last HW X point,
0600          * and the slope to be such that we hit 1.0 at 10000 nits.
0601          */
0602         const struct fixed31_32 end_value =
0603                 dc_fixpt_from_int(125);
0604 
0605         corner_points[1].red.slope = dc_fixpt_div(
0606             dc_fixpt_sub(dc_fixpt_one, corner_points[1].red.y),
0607             dc_fixpt_sub(end_value, corner_points[1].red.x));
0608         corner_points[1].green.slope = dc_fixpt_div(
0609             dc_fixpt_sub(dc_fixpt_one, corner_points[1].green.y),
0610             dc_fixpt_sub(end_value, corner_points[1].green.x));
0611         corner_points[1].blue.slope = dc_fixpt_div(
0612             dc_fixpt_sub(dc_fixpt_one, corner_points[1].blue.y),
0613             dc_fixpt_sub(end_value, corner_points[1].blue.x));
0614     }
0615 
0616     lut_params->hw_points_num = hw_points;
0617 
0618     k = 0;
0619     for (i = 1; i < MAX_REGIONS_NUMBER; i++) {
0620         if (seg_distr[k] != -1) {
0621             lut_params->arr_curve_points[k].segments_num =
0622                     seg_distr[k];
0623             lut_params->arr_curve_points[i].offset =
0624                     lut_params->arr_curve_points[k].offset + (1 << seg_distr[k]);
0625         }
0626         k++;
0627     }
0628 
0629     if (seg_distr[k] != -1)
0630         lut_params->arr_curve_points[k].segments_num = seg_distr[k];
0631 
0632     rgb = rgb_resulted;
0633     rgb_plus_1 = rgb_resulted + 1;
0634 
0635     i = 1;
0636     while (i != hw_points + 1) {
0637         rgb->delta_red   = dc_fixpt_sub(rgb_plus_1->red,   rgb->red);
0638         rgb->delta_green = dc_fixpt_sub(rgb_plus_1->green, rgb->green);
0639         rgb->delta_blue  = dc_fixpt_sub(rgb_plus_1->blue,  rgb->blue);
0640 
0641         ++rgb_plus_1;
0642         ++rgb;
0643         ++i;
0644     }
0645     cm_helper_convert_to_custom_float(rgb_resulted,
0646                         lut_params->corner_points,
0647                         hw_points, false);
0648 
0649     return true;
0650 }
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