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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ | |
4 | * Author: Jyri Sarha <jsarha@ti.com> | |
5 | */ | |
6 | ||
7 | #include <linux/device.h> | |
8 | #include <linux/kernel.h> | |
9 | ||
10 | #include "tidss_scale_coefs.h" | |
11 | ||
12 | /* | |
13 | * These are interpolated with a custom python script from DSS5 | |
14 | * (drivers/gpu/drm/omapdrm/dss/dispc_coef.c) coefficients. | |
15 | */ | |
16 | static const struct tidss_scale_coefs coef5_m32 = { | |
17 | .c2 = { 28, 34, 40, 46, 52, 58, 64, 70, 0, 2, 4, 8, 12, 16, 20, 24, }, | |
18 | .c1 = { 132, 138, 144, 150, 156, 162, 168, 174, 76, 84, 92, 98, 104, 110, 116, 124, }, | |
19 | .c0 = { 192, 192, 192, 190, 188, 186, 184, 182, 180, }, | |
20 | }; | |
21 | ||
22 | static const struct tidss_scale_coefs coef5_m26 = { | |
23 | .c2 = { 24, 28, 32, 38, 44, 50, 56, 64, 0, 2, 4, 6, 8, 12, 16, 20, }, | |
24 | .c1 = { 132, 138, 144, 152, 160, 166, 172, 178, 72, 80, 88, 94, 100, 108, 116, 124, }, | |
25 | .c0 = { 200, 202, 204, 202, 200, 196, 192, 188, 184, }, | |
26 | }; | |
27 | ||
28 | static const struct tidss_scale_coefs coef5_m22 = { | |
29 | .c2 = { 16, 20, 24, 30, 36, 42, 48, 56, 0, 0, 0, 2, 4, 8, 12, 14, }, | |
30 | .c1 = { 132, 140, 148, 156, 164, 172, 180, 186, 64, 72, 80, 88, 96, 104, 112, 122, }, | |
31 | .c0 = { 216, 216, 216, 214, 212, 208, 204, 198, 192, }, | |
32 | }; | |
33 | ||
34 | static const struct tidss_scale_coefs coef5_m19 = { | |
35 | .c2 = { 12, 14, 16, 22, 28, 34, 40, 48, 0, 0, 0, 2, 4, 4, 4, 8, }, | |
36 | .c1 = { 128, 140, 152, 160, 168, 176, 184, 192, 56, 64, 72, 82, 92, 100, 108, 118, }, | |
37 | .c0 = { 232, 232, 232, 226, 220, 218, 216, 208, 200, }, | |
38 | }; | |
39 | ||
40 | static const struct tidss_scale_coefs coef5_m16 = { | |
41 | .c2 = { 0, 2, 4, 8, 12, 18, 24, 32, 0, 0, 0, -2, -4, -4, -4, -2, }, | |
42 | .c1 = { 124, 138, 152, 164, 176, 186, 196, 206, 40, 48, 56, 68, 80, 90, 100, 112, }, | |
43 | .c0 = { 264, 262, 260, 254, 248, 242, 236, 226, 216, }, | |
44 | }; | |
45 | ||
46 | static const struct tidss_scale_coefs coef5_m14 = { | |
47 | .c2 = { -8, -6, -4, -2, 0, 6, 12, 18, 0, -2, -4, -6, -8, -8, -8, -8, }, | |
48 | .c1 = { 120, 134, 148, 164, 180, 194, 208, 220, 24, 32, 40, 52, 64, 78, 92, 106, }, | |
49 | .c0 = { 288, 286, 284, 280, 276, 266, 256, 244, 232, }, | |
50 | }; | |
51 | ||
52 | static const struct tidss_scale_coefs coef5_m13 = { | |
53 | .c2 = { -12, -12, -12, -10, -8, -4, 0, 6, 0, -2, -4, -6, -8, -10, -12, -12, }, | |
54 | .c1 = { 112, 130, 148, 164, 180, 196, 212, 228, 12, 22, 32, 44, 56, 70, 84, 98, }, | |
55 | .c0 = { 312, 308, 304, 298, 292, 282, 272, 258, 244, }, | |
56 | }; | |
57 | ||
58 | static const struct tidss_scale_coefs coef5_m12 = { | |
59 | .c2 = { -16, -18, -20, -18, -16, -14, -12, -6, 0, -2, -4, -6, -8, -10, -12, -14, }, | |
60 | .c1 = { 104, 124, 144, 164, 184, 202, 220, 238, 0, 10, 20, 30, 40, 56, 72, 88, }, | |
61 | .c0 = { 336, 332, 328, 320, 312, 300, 288, 272, 256, }, | |
62 | }; | |
63 | ||
64 | static const struct tidss_scale_coefs coef5_m11 = { | |
65 | .c2 = { -20, -22, -24, -24, -24, -24, -24, -20, 0, -2, -4, -6, -8, -10, -12, -16, }, | |
66 | .c1 = { 92, 114, 136, 158, 180, 204, 228, 250, -16, -8, 0, 12, 24, 38, 52, 72, }, | |
67 | .c0 = { 368, 364, 360, 350, 340, 326, 312, 292, 272, }, | |
68 | }; | |
69 | ||
70 | static const struct tidss_scale_coefs coef5_m10 = { | |
71 | .c2 = { -16, -20, -24, -28, -32, -34, -36, -34, 0, 0, 0, -2, -4, -8, -12, -14, }, | |
72 | .c1 = { 72, 96, 120, 148, 176, 204, 232, 260, -32, -26, -20, -10, 0, 16, 32, 52, }, | |
73 | .c0 = { 400, 398, 396, 384, 372, 354, 336, 312, 288, }, | |
74 | }; | |
75 | ||
76 | static const struct tidss_scale_coefs coef5_m9 = { | |
77 | .c2 = { -12, -18, -24, -28, -32, -38, -44, -46, 0, 2, 4, 2, 0, -2, -4, -8, }, | |
78 | .c1 = { 40, 68, 96, 128, 160, 196, 232, 268, -48, -46, -44, -36, -28, -14, 0, 20, }, | |
79 | .c0 = { 456, 450, 444, 428, 412, 388, 364, 334, 304, }, | |
80 | }; | |
81 | ||
82 | static const struct tidss_scale_coefs coef5_m8 = { | |
83 | .c2 = { 0, -4, -8, -16, -24, -32, -40, -48, 0, 2, 4, 6, 8, 6, 4, 2, }, | |
84 | .c1 = { 0, 28, 56, 94, 132, 176, 220, 266, -56, -60, -64, -62, -60, -50, -40, -20, }, | |
85 | .c0 = { 512, 506, 500, 478, 456, 424, 392, 352, 312, }, | |
86 | }; | |
87 | ||
88 | static const struct tidss_scale_coefs coef3_m32 = { | |
89 | .c1 = { 108, 92, 76, 62, 48, 36, 24, 140, 256, 236, 216, 198, 180, 162, 144, 126, }, | |
90 | .c0 = { 296, 294, 292, 288, 284, 278, 272, 136, 256, }, | |
91 | }; | |
92 | ||
93 | static const struct tidss_scale_coefs coef3_m26 = { | |
94 | .c1 = { 104, 90, 76, 60, 44, 32, 20, 138, 256, 236, 216, 198, 180, 160, 140, 122, }, | |
95 | .c0 = { 304, 300, 296, 292, 288, 282, 276, 138, 256, }, | |
96 | }; | |
97 | ||
98 | static const struct tidss_scale_coefs coef3_m22 = { | |
99 | .c1 = { 100, 84, 68, 54, 40, 30, 20, 138, 256, 236, 216, 196, 176, 156, 136, 118, }, | |
100 | .c0 = { 312, 310, 308, 302, 296, 286, 276, 138, 256, }, | |
101 | }; | |
102 | ||
103 | static const struct tidss_scale_coefs coef3_m19 = { | |
104 | .c1 = { 96, 80, 64, 50, 36, 26, 16, 136, 256, 236, 216, 194, 172, 152, 132, 114, }, | |
105 | .c0 = { 320, 318, 316, 310, 304, 292, 280, 140, 256, }, | |
106 | }; | |
107 | ||
108 | static const struct tidss_scale_coefs coef3_m16 = { | |
109 | .c1 = { 88, 72, 56, 44, 32, 22, 12, 134, 256, 234, 212, 190, 168, 148, 128, 108, }, | |
110 | .c0 = { 336, 332, 328, 320, 312, 300, 288, 144, 256, }, | |
111 | }; | |
112 | ||
113 | static const struct tidss_scale_coefs coef3_m14 = { | |
114 | .c1 = { 80, 64, 48, 36, 24, 16, 8, 132, 256, 232, 208, 186, 164, 142, 120, 100, }, | |
115 | .c0 = { 352, 348, 344, 334, 324, 310, 296, 148, 256, }, | |
116 | }; | |
117 | ||
118 | static const struct tidss_scale_coefs coef3_m13 = { | |
119 | .c1 = { 72, 56, 40, 30, 20, 12, 4, 130, 256, 232, 208, 184, 160, 136, 112, 92, }, | |
120 | .c0 = { 368, 364, 360, 346, 332, 316, 300, 150, 256, }, | |
121 | }; | |
122 | ||
123 | static const struct tidss_scale_coefs coef3_m12 = { | |
124 | .c1 = { 64, 50, 36, 26, 16, 10, 4, 130, 256, 230, 204, 178, 152, 128, 104, 84, }, | |
125 | .c0 = { 384, 378, 372, 358, 344, 324, 304, 152, 256, }, | |
126 | }; | |
127 | ||
128 | static const struct tidss_scale_coefs coef3_m11 = { | |
129 | .c1 = { 56, 40, 24, 16, 8, 4, 0, 128, 256, 228, 200, 172, 144, 120, 96, 76, }, | |
130 | .c0 = { 400, 396, 392, 376, 360, 336, 312, 156, 256, }, | |
131 | }; | |
132 | ||
133 | static const struct tidss_scale_coefs coef3_m10 = { | |
134 | .c1 = { 40, 26, 12, 6, 0, -2, -4, 126, 256, 226, 196, 166, 136, 110, 84, 62, }, | |
135 | .c0 = { 432, 424, 416, 396, 376, 348, 320, 160, 256, }, | |
136 | }; | |
137 | ||
138 | static const struct tidss_scale_coefs coef3_m9 = { | |
139 | .c1 = { 24, 12, 0, -4, -8, -8, -8, 124, 256, 222, 188, 154, 120, 92, 64, 44, }, | |
140 | .c0 = { 464, 456, 448, 424, 400, 366, 332, 166, 256, }, | |
141 | }; | |
142 | ||
143 | static const struct tidss_scale_coefs coef3_m8 = { | |
144 | .c1 = { 0, -8, -16, -16, -16, -12, -8, 124, 256, 214, 172, 134, 96, 66, 36, 18, }, | |
145 | .c0 = { 512, 502, 492, 462, 432, 390, 348, 174, 256, }, | |
146 | }; | |
147 | ||
148 | const struct tidss_scale_coefs *tidss_get_scale_coefs(struct device *dev, | |
149 | u32 firinc, | |
150 | bool five_taps) | |
151 | { | |
152 | int i; | |
153 | int inc; | |
154 | static const struct { | |
155 | int mmin; | |
156 | int mmax; | |
157 | const struct tidss_scale_coefs *coef3; | |
158 | const struct tidss_scale_coefs *coef5; | |
159 | const char *name; | |
160 | } coefs[] = { | |
161 | { 27, 32, &coef3_m32, &coef5_m32, "M32" }, | |
162 | { 23, 26, &coef3_m26, &coef5_m26, "M26" }, | |
163 | { 20, 22, &coef3_m22, &coef5_m22, "M22" }, | |
164 | { 17, 19, &coef3_m19, &coef5_m19, "M19" }, | |
165 | { 15, 16, &coef3_m16, &coef5_m16, "M16" }, | |
166 | { 14, 14, &coef3_m14, &coef5_m14, "M14" }, | |
167 | { 13, 13, &coef3_m13, &coef5_m13, "M13" }, | |
168 | { 12, 12, &coef3_m12, &coef5_m12, "M12" }, | |
169 | { 11, 11, &coef3_m11, &coef5_m11, "M11" }, | |
170 | { 10, 10, &coef3_m10, &coef5_m10, "M10" }, | |
171 | { 9, 9, &coef3_m9, &coef5_m9, "M9" }, | |
172 | { 4, 8, &coef3_m8, &coef5_m8, "M8" }, | |
173 | /* | |
174 | * When upscaling more than two times, blockiness and outlines | |
175 | * around the image are observed when M8 tables are used. M11, | |
176 | * M16 and M19 tables are used to prevent this. | |
177 | */ | |
178 | { 3, 3, &coef3_m11, &coef5_m11, "M11" }, | |
179 | { 2, 2, &coef3_m16, &coef5_m16, "M16" }, | |
180 | { 0, 1, &coef3_m19, &coef5_m19, "M19" }, | |
181 | }; | |
182 | ||
183 | /* | |
184 | * inc is result of 0x200000 * in_size / out_size. This dividing | |
185 | * by 0x40000 scales it down to 8 * in_size / out_size. After | |
186 | * division the actual scaling factor is 8/inc. | |
187 | */ | |
188 | inc = firinc / 0x40000; | |
189 | for (i = 0; i < ARRAY_SIZE(coefs); ++i) { | |
190 | if (inc >= coefs[i].mmin && inc <= coefs[i].mmax) { | |
191 | if (five_taps) | |
192 | return coefs[i].coef5; | |
193 | else | |
194 | return coefs[i].coef3; | |
195 | } | |
196 | } | |
197 | ||
198 | dev_err(dev, "%s: Coefficients not found for firinc 0x%08x, inc %d\n", | |
199 | __func__, firinc, inc); | |
200 | ||
201 | return NULL; | |
202 | } |