LXR linux/drivers/gpu/drm/amd/display/modules/color/color

   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
  26#ifndef COLOR_MOD_COLOR_GAMMA_H_
  27#define COLOR_MOD_COLOR_GAMMA_H_
  28
  29#include "color_table.h"
  30
  31struct dc_transfer_func;
  32struct dc_gamma;
  33struct dc_transfer_func_distributed_points;
  34struct dc_rgb_fixed;
  35struct dc_color_caps;
  36enum dc_transfer_func_predefined;
  37
  38/* For SetRegamma ADL interface support
  39 * Must match escape type
  40 */
  41union regamma_flags {
  42        unsigned int raw;
  43        struct {
  44                unsigned int gammaRampArray       :1;    // RegammaRamp is in use
  45                unsigned int gammaFromEdid        :1;    //gamma from edid is in use
  46                unsigned int gammaFromEdidEx      :1;    //gamma from edid is in use , but only for Display Id 1.2
  47                unsigned int gammaFromUser        :1;    //user custom gamma is used
  48                unsigned int coeffFromUser        :1;    //coeff. A0-A3 from user is in use
  49                unsigned int coeffFromEdid        :1;    //coeff. A0-A3 from edid is in use
  50                unsigned int applyDegamma         :1;    //flag for additional degamma correction in driver
  51                unsigned int gammaPredefinedSRGB  :1;    //flag for SRGB gamma
  52                unsigned int gammaPredefinedPQ    :1;    //flag for PQ gamma
  53                unsigned int gammaPredefinedPQ2084Interim :1;    //flag for PQ gamma, lower max nits
  54                unsigned int gammaPredefined36    :1;    //flag for 3.6 gamma
  55                unsigned int gammaPredefinedReset :1;    //flag to return to previous gamma
  56        } bits;
  57};
  58
  59struct regamma_ramp {
  60        unsigned short gamma[256*3];  // gamma ramp packed  in same way as OS windows ,r , g & b
  61};
  62
  63struct regamma_coeff {
  64        int    gamma[3];
  65        int    A0[3];
  66        int    A1[3];
  67        int    A2[3];
  68        int    A3[3];
  69};
  70
  71struct regamma_lut {
  72        union regamma_flags flags;
  73        union {
  74                struct regamma_ramp ramp;
  75                struct regamma_coeff coeff;
  76        };
  77};
  78
  79struct freesync_hdr_tf_params {
  80        unsigned int sdr_white_level;
  81        unsigned int min_content; // luminance in 1/10000 nits
  82        unsigned int max_content; // luminance in nits
  83        unsigned int min_display; // luminance in 1/10000 nits
  84        unsigned int max_display; // luminance in nits
  85        unsigned int skip_tm; // skip tm
  86};
  87
  88struct calculate_buffer {
  89        int buffer_index;
  90        struct fixed31_32 buffer[NUM_PTS_IN_REGION];
  91        struct fixed31_32 gamma_of_2;
  92};
  93
  94struct translate_from_linear_space_args {
  95        struct fixed31_32 arg;
  96        struct fixed31_32 a0;
  97        struct fixed31_32 a1;
  98        struct fixed31_32 a2;
  99        struct fixed31_32 a3;
 100        struct fixed31_32 gamma;
 101        struct calculate_buffer *cal_buffer;
 102};
 103
 104void setup_x_points_distribution(void);
 105void log_x_points_distribution(struct dal_logger *logger);
 106void precompute_pq(void);
 107void precompute_de_pq(void);
 108
 109bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
 110                const struct dc_gamma *ramp, bool mapUserRamp, bool canRomBeUsed,
 111                const struct freesync_hdr_tf_params *fs_params,
 112                struct calculate_buffer *cal_buffer);
 113
 114bool mod_color_calculate_degamma_params(struct dc_color_caps *dc_caps,
 115                struct dc_transfer_func *output_tf,
 116                const struct dc_gamma *ramp, bool mapUserRamp);
 117
 118bool mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,
 119                                struct dc_transfer_func_distributed_points *points);
 120
 121bool calculate_user_regamma_coeff(struct dc_transfer_func *output_tf,
 122                const struct regamma_lut *regamma,
 123                struct calculate_buffer *cal_buffer,
 124                const struct dc_gamma *ramp);
 125
 126bool calculate_user_regamma_ramp(struct dc_transfer_func *output_tf,
 127                const struct regamma_lut *regamma,
 128                struct calculate_buffer *cal_buffer,
 129                const struct dc_gamma *ramp);
 130
 131
 132#endif /* COLOR_MOD_COLOR_GAMMA_H_ */
 133