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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) Jernej Skrabec <jernej.skrabec@siol.net>
4 */
5
6#include <drm/drm_print.h>
7
8#include "sun8i_csc.h"
9#include "sun8i_mixer.h"
10
11static const u32 ccsc_base[2][2] = {
12 {CCSC00_OFFSET, CCSC01_OFFSET},
13 {CCSC10_OFFSET, CCSC11_OFFSET},
14};
15
16/*
17 * Factors are in two's complement format, 10 bits for fractinal part.
18 * First tree values in each line are multiplication factor and last
19 * value is constant, which is added at the end.
20 */
21
22static const u32 yuv2rgb[2][2][12] = {
23 [DRM_COLOR_YCBCR_LIMITED_RANGE] = {
24 [DRM_COLOR_YCBCR_BT601] = {
25 0x000004A8, 0x00000000, 0x00000662, 0xFFFC8451,
26 0x000004A8, 0xFFFFFE6F, 0xFFFFFCC0, 0x00021E4D,
27 0x000004A8, 0x00000811, 0x00000000, 0xFFFBACA9,
28 },
29 [DRM_COLOR_YCBCR_BT709] = {
30 0x000004A8, 0x00000000, 0x0000072B, 0xFFFC1F99,
31 0x000004A8, 0xFFFFFF26, 0xFFFFFDDF, 0x00013383,
32 0x000004A8, 0x00000873, 0x00000000, 0xFFFB7BEF,
33 }
34 },
35 [DRM_COLOR_YCBCR_FULL_RANGE] = {
36 [DRM_COLOR_YCBCR_BT601] = {
37 0x00000400, 0x00000000, 0x0000059B, 0xFFFD322E,
38 0x00000400, 0xFFFFFEA0, 0xFFFFFD25, 0x00021DD5,
39 0x00000400, 0x00000716, 0x00000000, 0xFFFC74BD,
40 },
41 [DRM_COLOR_YCBCR_BT709] = {
42 0x00000400, 0x00000000, 0x0000064C, 0xFFFCD9B4,
43 0x00000400, 0xFFFFFF41, 0xFFFFFE21, 0x00014F96,
44 0x00000400, 0x0000076C, 0x00000000, 0xFFFC49EF,
45 }
46 },
47};
48
49/*
50 * DE3 has a bit different CSC units. Factors are in two's complement format.
51 * First three factors in a row are multiplication factors which have 17 bits
52 * for fractional part. Fourth value in a row is comprised of two factors.
53 * Upper 16 bits represents difference, which is subtracted from the input
54 * value before multiplication and lower 16 bits represents constant, which
55 * is addes at the end.
56 *
57 * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0
58 * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1
59 * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2
60 *
61 * Please note that above formula is true only for Blender CSC. Other DE3 CSC
62 * units takes only positive value for difference. From what can be deducted
63 * from BSP driver code, those units probably automatically assume that
64 * difference has to be subtracted.
65 *
66 * Layout of factors in table:
67 * c00 c01 c02 [d0 const0]
68 * c10 c11 c12 [d1 const1]
69 * c20 c21 c22 [d2 const2]
70 */
71
72static const u32 yuv2rgb_de3[2][3][12] = {
73 [DRM_COLOR_YCBCR_LIMITED_RANGE] = {
74 [DRM_COLOR_YCBCR_BT601] = {
75 0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000,
76 0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000,
77 0x0002542A, 0x000408D2, 0x00000000, 0xFE000000,
78 },
79 [DRM_COLOR_YCBCR_BT709] = {
80 0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000,
81 0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000,
82 0x0002542A, 0x0004398C, 0x00000000, 0xFE000000,
83 },
84 [DRM_COLOR_YCBCR_BT2020] = {
85 0x0002542A, 0x00000000, 0x00035B7B, 0xFFC00000,
86 0x0002542A, 0xFFFFA017, 0xFFFEB2FC, 0xFE000000,
87 0x0002542A, 0x00044896, 0x00000000, 0xFE000000,
88 }
89 },
90 [DRM_COLOR_YCBCR_FULL_RANGE] = {
91 [DRM_COLOR_YCBCR_BT601] = {
92 0x00020000, 0x00000000, 0x0002CDD2, 0x00000000,
93 0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000,
94 0x00020000, 0x00038B43, 0x00000000, 0xFE000000,
95 },
96 [DRM_COLOR_YCBCR_BT709] = {
97 0x00020000, 0x00000000, 0x0003264C, 0x00000000,
98 0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000,
99 0x00020000, 0x0003B611, 0x00000000, 0xFE000000,
100 },
101 [DRM_COLOR_YCBCR_BT2020] = {
102 0x00020000, 0x00000000, 0x0002F2FE, 0x00000000,
103 0x00020000, 0xFFFFABC0, 0xFFFEDB78, 0xFE000000,
104 0x00020000, 0x0003C346, 0x00000000, 0xFE000000,
105 }
106 },
107};
108
109static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
110 enum sun8i_csc_mode mode,
111 enum drm_color_encoding encoding,
112 enum drm_color_range range)
113{
114 const u32 *table;
115 u32 base_reg;
116 int i;
117
118 table = yuv2rgb[range][encoding];
119
120 switch (mode) {
121 case SUN8I_CSC_MODE_YUV2RGB:
122 base_reg = SUN8I_CSC_COEFF(base, 0);
123 regmap_bulk_write(map, base_reg, table, 12);
124 break;
125 case SUN8I_CSC_MODE_YVU2RGB:
126 for (i = 0; i < 12; i++) {
127 if ((i & 3) == 1)
128 base_reg = SUN8I_CSC_COEFF(base, i + 1);
129 else if ((i & 3) == 2)
130 base_reg = SUN8I_CSC_COEFF(base, i - 1);
131 else
132 base_reg = SUN8I_CSC_COEFF(base, i);
133 regmap_write(map, base_reg, table[i]);
134 }
135 break;
136 default:
137 DRM_WARN("Wrong CSC mode specified.\n");
138 return;
139 }
140}
141
142static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
143 enum sun8i_csc_mode mode,
144 enum drm_color_encoding encoding,
145 enum drm_color_range range)
146{
147 const u32 *table;
148 u32 addr;
149 int i;
150
151 table = yuv2rgb_de3[range][encoding];
152
153 switch (mode) {
154 case SUN8I_CSC_MODE_YUV2RGB:
155 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
156 regmap_bulk_write(map, addr, table, 12);
157 break;
158 case SUN8I_CSC_MODE_YVU2RGB:
159 for (i = 0; i < 12; i++) {
160 if ((i & 3) == 1)
161 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
162 layer,
163 i + 1);
164 else if ((i & 3) == 2)
165 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
166 layer,
167 i - 1);
168 else
169 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
170 layer, i);
171 regmap_write(map, addr, table[i]);
172 }
173 break;
174 default:
175 DRM_WARN("Wrong CSC mode specified.\n");
176 return;
177 }
178}
179
180static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
181{
182 u32 val;
183
184 if (enable)
185 val = SUN8I_CSC_CTRL_EN;
186 else
187 val = 0;
188
189 regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val);
190}
191
192static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable)
193{
194 u32 val, mask;
195
196 mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
197
198 if (enable)
199 val = mask;
200 else
201 val = 0;
202
203 regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE),
204 mask, val);
205}
206
207void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
208 enum sun8i_csc_mode mode,
209 enum drm_color_encoding encoding,
210 enum drm_color_range range)
211{
212 u32 base;
213
214 if (mixer->cfg->is_de3) {
215 sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer,
216 mode, encoding, range);
217 return;
218 }
219
220 base = ccsc_base[mixer->cfg->ccsc][layer];
221
222 sun8i_csc_set_coefficients(mixer->engine.regs, base,
223 mode, encoding, range);
224}
225
226void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
227{
228 u32 base;
229
230 if (mixer->cfg->is_de3) {
231 sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
232 return;
233 }
234
235 base = ccsc_base[mixer->cfg->ccsc][layer];
236
237 sun8i_csc_enable(mixer->engine.regs, base, enable);
238}