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