1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ |
4 | * Author: Chandrabhanu Mahapatra <cmahapatra@ti.com> |
5 | */ |
6 | |
7 | #include <linux/kernel.h> |
8 | |
9 | #include "omapdss.h" |
10 | #include "dispc.h" |
11 | |
12 | static const struct dispc_coef coef3_M8[8] = { |
13 | { 0, 0, 128, 0, 0 }, |
14 | { 0, -4, 123, 9, 0 }, |
15 | { 0, -4, 108, 24, 0 }, |
16 | { 0, -2, 87, 43, 0 }, |
17 | { 0, 64, 64, 0, 0 }, |
18 | { 0, 43, 87, -2, 0 }, |
19 | { 0, 24, 108, -4, 0 }, |
20 | { 0, 9, 123, -4, 0 }, |
21 | }; |
22 | |
23 | static const struct dispc_coef coef3_M9[8] = { |
24 | { 0, 6, 116, 6, 0 }, |
25 | { 0, 0, 112, 16, 0 }, |
26 | { 0, -2, 100, 30, 0 }, |
27 | { 0, -2, 83, 47, 0 }, |
28 | { 0, 64, 64, 0, 0 }, |
29 | { 0, 47, 83, -2, 0 }, |
30 | { 0, 30, 100, -2, 0 }, |
31 | { 0, 16, 112, 0, 0 }, |
32 | }; |
33 | |
34 | static const struct dispc_coef coef3_M10[8] = { |
35 | { 0, 10, 108, 10, 0 }, |
36 | { 0, 3, 104, 21, 0 }, |
37 | { 0, 0, 94, 34, 0 }, |
38 | { 0, -1, 80, 49, 0 }, |
39 | { 0, 64, 64, 0, 0 }, |
40 | { 0, 49, 80, -1, 0 }, |
41 | { 0, 34, 94, 0, 0 }, |
42 | { 0, 21, 104, 3, 0 }, |
43 | }; |
44 | |
45 | static const struct dispc_coef coef3_M11[8] = { |
46 | { 0, 14, 100, 14, 0 }, |
47 | { 0, 6, 98, 24, 0 }, |
48 | { 0, 2, 90, 36, 0 }, |
49 | { 0, 0, 78, 50, 0 }, |
50 | { 0, 64, 64, 0, 0 }, |
51 | { 0, 50, 78, 0, 0 }, |
52 | { 0, 36, 90, 2, 0 }, |
53 | { 0, 24, 98, 6, 0 }, |
54 | }; |
55 | |
56 | static const struct dispc_coef coef3_M12[8] = { |
57 | { 0, 16, 96, 16, 0 }, |
58 | { 0, 9, 93, 26, 0 }, |
59 | { 0, 4, 86, 38, 0 }, |
60 | { 0, 1, 76, 51, 0 }, |
61 | { 0, 64, 64, 0, 0 }, |
62 | { 0, 51, 76, 1, 0 }, |
63 | { 0, 38, 86, 4, 0 }, |
64 | { 0, 26, 93, 9, 0 }, |
65 | }; |
66 | |
67 | static const struct dispc_coef coef3_M13[8] = { |
68 | { 0, 18, 92, 18, 0 }, |
69 | { 0, 10, 90, 28, 0 }, |
70 | { 0, 5, 83, 40, 0 }, |
71 | { 0, 1, 75, 52, 0 }, |
72 | { 0, 64, 64, 0, 0 }, |
73 | { 0, 52, 75, 1, 0 }, |
74 | { 0, 40, 83, 5, 0 }, |
75 | { 0, 28, 90, 10, 0 }, |
76 | }; |
77 | |
78 | static const struct dispc_coef coef3_M14[8] = { |
79 | { 0, 20, 88, 20, 0 }, |
80 | { 0, 12, 86, 30, 0 }, |
81 | { 0, 6, 81, 41, 0 }, |
82 | { 0, 2, 74, 52, 0 }, |
83 | { 0, 64, 64, 0, 0 }, |
84 | { 0, 52, 74, 2, 0 }, |
85 | { 0, 41, 81, 6, 0 }, |
86 | { 0, 30, 86, 12, 0 }, |
87 | }; |
88 | |
89 | static const struct dispc_coef coef3_M16[8] = { |
90 | { 0, 22, 84, 22, 0 }, |
91 | { 0, 14, 82, 32, 0 }, |
92 | { 0, 8, 78, 42, 0 }, |
93 | { 0, 3, 72, 53, 0 }, |
94 | { 0, 64, 64, 0, 0 }, |
95 | { 0, 53, 72, 3, 0 }, |
96 | { 0, 42, 78, 8, 0 }, |
97 | { 0, 32, 82, 14, 0 }, |
98 | }; |
99 | |
100 | static const struct dispc_coef coef3_M19[8] = { |
101 | { 0, 24, 80, 24, 0 }, |
102 | { 0, 16, 79, 33, 0 }, |
103 | { 0, 9, 76, 43, 0 }, |
104 | { 0, 4, 70, 54, 0 }, |
105 | { 0, 64, 64, 0, 0 }, |
106 | { 0, 54, 70, 4, 0 }, |
107 | { 0, 43, 76, 9, 0 }, |
108 | { 0, 33, 79, 16, 0 }, |
109 | }; |
110 | |
111 | static const struct dispc_coef coef3_M22[8] = { |
112 | { 0, 25, 78, 25, 0 }, |
113 | { 0, 17, 77, 34, 0 }, |
114 | { 0, 10, 74, 44, 0 }, |
115 | { 0, 5, 69, 54, 0 }, |
116 | { 0, 64, 64, 0, 0 }, |
117 | { 0, 54, 69, 5, 0 }, |
118 | { 0, 44, 74, 10, 0 }, |
119 | { 0, 34, 77, 17, 0 }, |
120 | }; |
121 | |
122 | static const struct dispc_coef coef3_M26[8] = { |
123 | { 0, 26, 76, 26, 0 }, |
124 | { 0, 19, 74, 35, 0 }, |
125 | { 0, 11, 72, 45, 0 }, |
126 | { 0, 5, 69, 54, 0 }, |
127 | { 0, 64, 64, 0, 0 }, |
128 | { 0, 54, 69, 5, 0 }, |
129 | { 0, 45, 72, 11, 0 }, |
130 | { 0, 35, 74, 19, 0 }, |
131 | }; |
132 | |
133 | static const struct dispc_coef coef3_M32[8] = { |
134 | { 0, 27, 74, 27, 0 }, |
135 | { 0, 19, 73, 36, 0 }, |
136 | { 0, 12, 71, 45, 0 }, |
137 | { 0, 6, 68, 54, 0 }, |
138 | { 0, 64, 64, 0, 0 }, |
139 | { 0, 54, 68, 6, 0 }, |
140 | { 0, 45, 71, 12, 0 }, |
141 | { 0, 36, 73, 19, 0 }, |
142 | }; |
143 | |
144 | static const struct dispc_coef coef5_M8[8] = { |
145 | { 0, 0, 128, 0, 0 }, |
146 | { -2, 14, 125, -10, 1 }, |
147 | { -6, 33, 114, -15, 2 }, |
148 | { -10, 55, 98, -16, 1 }, |
149 | { 0, -14, 78, 78, -14 }, |
150 | { 1, -16, 98, 55, -10 }, |
151 | { 2, -15, 114, 33, -6 }, |
152 | { 1, -10, 125, 14, -2 }, |
153 | }; |
154 | |
155 | static const struct dispc_coef coef5_M9[8] = { |
156 | { -3, 10, 114, 10, -3 }, |
157 | { -6, 24, 111, 0, -1 }, |
158 | { -8, 40, 103, -7, 0 }, |
159 | { -11, 58, 91, -11, 1 }, |
160 | { 0, -12, 76, 76, -12 }, |
161 | { 1, -11, 91, 58, -11 }, |
162 | { 0, -7, 103, 40, -8 }, |
163 | { -1, 0, 111, 24, -6 }, |
164 | }; |
165 | |
166 | static const struct dispc_coef coef5_M10[8] = { |
167 | { -4, 18, 100, 18, -4 }, |
168 | { -6, 30, 99, 8, -3 }, |
169 | { -8, 44, 93, 0, -1 }, |
170 | { -9, 58, 84, -5, 0 }, |
171 | { 0, -8, 72, 72, -8 }, |
172 | { 0, -5, 84, 58, -9 }, |
173 | { -1, 0, 93, 44, -8 }, |
174 | { -3, 8, 99, 30, -6 }, |
175 | }; |
176 | |
177 | static const struct dispc_coef coef5_M11[8] = { |
178 | { -5, 23, 92, 23, -5 }, |
179 | { -6, 34, 90, 13, -3 }, |
180 | { -6, 45, 85, 6, -2 }, |
181 | { -6, 57, 78, 0, -1 }, |
182 | { 0, -4, 68, 68, -4 }, |
183 | { -1, 0, 78, 57, -6 }, |
184 | { -2, 6, 85, 45, -6 }, |
185 | { -3, 13, 90, 34, -6 }, |
186 | }; |
187 | |
188 | static const struct dispc_coef coef5_M12[8] = { |
189 | { -4, 26, 84, 26, -4 }, |
190 | { -5, 36, 82, 18, -3 }, |
191 | { -4, 46, 78, 10, -2 }, |
192 | { -3, 55, 72, 5, -1 }, |
193 | { 0, 0, 64, 64, 0 }, |
194 | { -1, 5, 72, 55, -3 }, |
195 | { -2, 10, 78, 46, -4 }, |
196 | { -3, 18, 82, 36, -5 }, |
197 | }; |
198 | |
199 | static const struct dispc_coef coef5_M13[8] = { |
200 | { -3, 28, 78, 28, -3 }, |
201 | { -3, 37, 76, 21, -3 }, |
202 | { -2, 45, 73, 14, -2 }, |
203 | { 0, 53, 68, 8, -1 }, |
204 | { 0, 3, 61, 61, 3 }, |
205 | { -1, 8, 68, 53, 0 }, |
206 | { -2, 14, 73, 45, -2 }, |
207 | { -3, 21, 76, 37, -3 }, |
208 | }; |
209 | |
210 | static const struct dispc_coef coef5_M14[8] = { |
211 | { -2, 30, 72, 30, -2 }, |
212 | { -1, 37, 71, 23, -2 }, |
213 | { 0, 45, 69, 16, -2 }, |
214 | { 3, 52, 64, 10, -1 }, |
215 | { 0, 6, 58, 58, 6 }, |
216 | { -1, 10, 64, 52, 3 }, |
217 | { -2, 16, 69, 45, 0 }, |
218 | { -2, 23, 71, 37, -1 }, |
219 | }; |
220 | |
221 | static const struct dispc_coef coef5_M16[8] = { |
222 | { 0, 31, 66, 31, 0 }, |
223 | { 1, 38, 65, 25, -1 }, |
224 | { 3, 44, 62, 20, -1 }, |
225 | { 6, 49, 59, 14, 0 }, |
226 | { 0, 10, 54, 54, 10 }, |
227 | { 0, 14, 59, 49, 6 }, |
228 | { -1, 20, 62, 44, 3 }, |
229 | { -1, 25, 65, 38, 1 }, |
230 | }; |
231 | |
232 | static const struct dispc_coef coef5_M19[8] = { |
233 | { 3, 32, 58, 32, 3 }, |
234 | { 4, 38, 58, 27, 1 }, |
235 | { 7, 42, 55, 23, 1 }, |
236 | { 10, 46, 54, 18, 0 }, |
237 | { 0, 14, 50, 50, 14 }, |
238 | { 0, 18, 54, 46, 10 }, |
239 | { 1, 23, 55, 42, 7 }, |
240 | { 1, 27, 58, 38, 4 }, |
241 | }; |
242 | |
243 | static const struct dispc_coef coef5_M22[8] = { |
244 | { 4, 33, 54, 33, 4 }, |
245 | { 6, 37, 54, 28, 3 }, |
246 | { 9, 41, 53, 24, 1 }, |
247 | { 12, 45, 51, 20, 0 }, |
248 | { 0, 16, 48, 48, 16 }, |
249 | { 0, 20, 51, 45, 12 }, |
250 | { 1, 24, 53, 41, 9 }, |
251 | { 3, 28, 54, 37, 6 }, |
252 | }; |
253 | |
254 | static const struct dispc_coef coef5_M26[8] = { |
255 | { 6, 33, 50, 33, 6 }, |
256 | { 8, 36, 51, 29, 4 }, |
257 | { 11, 40, 50, 25, 2 }, |
258 | { 14, 43, 48, 22, 1 }, |
259 | { 0, 18, 46, 46, 18 }, |
260 | { 1, 22, 48, 43, 14 }, |
261 | { 2, 25, 50, 40, 11 }, |
262 | { 4, 29, 51, 36, 8 }, |
263 | }; |
264 | |
265 | static const struct dispc_coef coef5_M32[8] = { |
266 | { 7, 33, 48, 33, 7 }, |
267 | { 10, 36, 48, 29, 5 }, |
268 | { 13, 39, 47, 26, 3 }, |
269 | { 16, 42, 46, 23, 1 }, |
270 | { 0, 19, 45, 45, 19 }, |
271 | { 1, 23, 46, 42, 16 }, |
272 | { 3, 26, 47, 39, 13 }, |
273 | { 5, 29, 48, 36, 10 }, |
274 | }; |
275 | |
276 | const struct dispc_coef *dispc_ovl_get_scale_coef(int inc, int five_taps) |
277 | { |
278 | int i; |
279 | static const struct { |
280 | int Mmin; |
281 | int Mmax; |
282 | const struct dispc_coef *coef_3; |
283 | const struct dispc_coef *coef_5; |
284 | } coefs[] = { |
285 | { .Mmin: 27, .Mmax: 32, .coef_3: coef3_M32, .coef_5: coef5_M32 }, |
286 | { 23, 26, coef3_M26, coef5_M26 }, |
287 | { 20, 22, coef3_M22, coef5_M22 }, |
288 | { 17, 19, coef3_M19, coef5_M19 }, |
289 | { 15, 16, coef3_M16, coef5_M16 }, |
290 | { 14, 14, coef3_M14, coef5_M14 }, |
291 | { 13, 13, coef3_M13, coef5_M13 }, |
292 | { 12, 12, coef3_M12, coef5_M12 }, |
293 | { 11, 11, coef3_M11, coef5_M11 }, |
294 | { 10, 10, coef3_M10, coef5_M10 }, |
295 | { 9, 9, coef3_M9, coef5_M9 }, |
296 | { 4, 8, coef3_M8, coef5_M8 }, |
297 | /* |
298 | * When upscaling more than two times, blockiness and outlines |
299 | * around the image are observed when M8 tables are used. M11, |
300 | * M16 and M19 tables are used to prevent this. |
301 | */ |
302 | { 3, 3, coef3_M11, coef5_M11 }, |
303 | { 2, 2, coef3_M16, coef5_M16 }, |
304 | { 0, 1, coef3_M19, coef5_M19 }, |
305 | }; |
306 | |
307 | inc /= 128; |
308 | for (i = 0; i < ARRAY_SIZE(coefs); ++i) |
309 | if (inc >= coefs[i].Mmin && inc <= coefs[i].Mmax) |
310 | return five_taps ? coefs[i].coef_5 : coefs[i].coef_3; |
311 | return NULL; |
312 | } |
313 | |