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 
31 struct dc_transfer_func;
32 struct dc_gamma;
33 struct dc_transfer_func_distributed_points;
34 struct dc_rgb_fixed;
35 struct dc_color_caps;
36 enum dc_transfer_func_predefined;
37 
38 /* For SetRegamma ADL interface support
39  * Must match escape type
40  */
41 union 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 
59 struct regamma_ramp {
60 	unsigned short gamma[256*3];  // gamma ramp packed  in same way as OS windows ,r , g & b
61 };
62 
63 struct regamma_coeff {
64 	int    gamma[3];
65 	int    A0[3];
66 	int    A1[3];
67 	int    A2[3];
68 	int    A3[3];
69 };
70 
71 struct regamma_lut {
72 	union regamma_flags flags;
73 	union {
74 		struct regamma_ramp ramp;
75 		struct regamma_coeff coeff;
76 	};
77 };
78 
79 struct hdr_tm_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 
88 struct calculate_buffer {
89 	int buffer_index;
90 	struct fixed31_32 buffer[NUM_PTS_IN_REGION];
91 	struct fixed31_32 gamma_of_2;
92 };
93 
94 struct 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 
104 void setup_x_points_distribution(void);
105 void log_x_points_distribution(struct dal_logger *logger);
106 void precompute_pq(void);
107 void precompute_de_pq(void);
108 
109 bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
110 		const struct dc_gamma *ramp, bool mapUserRamp, bool canRomBeUsed,
111 		const struct hdr_tm_params *fs_params,
112 		struct calculate_buffer *cal_buffer);
113 
114 bool 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 
118 bool calculate_user_regamma_coeff(struct dc_transfer_func *output_tf,
119 		const struct regamma_lut *regamma,
120 		struct calculate_buffer *cal_buffer,
121 		const struct dc_gamma *ramp);
122 
123 bool calculate_user_regamma_ramp(struct dc_transfer_func *output_tf,
124 		const struct regamma_lut *regamma,
125 		struct calculate_buffer *cal_buffer,
126 		const struct dc_gamma *ramp);
127 
128 
129 #endif /* COLOR_MOD_COLOR_GAMMA_H_ */
130