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
49static const u32 yvu2rgb[2][2][12] = {
50	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
51		[DRM_COLOR_YCBCR_BT601] = {
52			0x000004A8, 0x00000662, 0x00000000, 0xFFFC8451,
53			0x000004A8, 0xFFFFFCC0, 0xFFFFFE6F, 0x00021E4D,
54			0x000004A8, 0x00000000, 0x00000811, 0xFFFBACA9,
55		},
56		[DRM_COLOR_YCBCR_BT709] = {
57			0x000004A8, 0x0000072B, 0x00000000, 0xFFFC1F99,
58			0x000004A8, 0xFFFFFDDF, 0xFFFFFF26, 0x00013383,
59			0x000004A8, 0x00000000, 0x00000873, 0xFFFB7BEF,
60		}
61	},
62	[DRM_COLOR_YCBCR_FULL_RANGE] = {
63		[DRM_COLOR_YCBCR_BT601] = {
64			0x00000400, 0x0000059B, 0x00000000, 0xFFFD322E,
65			0x00000400, 0xFFFFFD25, 0xFFFFFEA0, 0x00021DD5,
66			0x00000400, 0x00000000, 0x00000716, 0xFFFC74BD,
67		},
68		[DRM_COLOR_YCBCR_BT709] = {
69			0x00000400, 0x0000064C, 0x00000000, 0xFFFCD9B4,
70			0x00000400, 0xFFFFFE21, 0xFFFFFF41, 0x00014F96,
71			0x00000400, 0x00000000, 0x0000076C, 0xFFFC49EF,
72		}
73	},
74};
75
76/*
77 * DE3 has a bit different CSC units. Factors are in two's complement format.
78 * First three factors in a row are multiplication factors which have 17 bits
79 * for fractional part. Fourth value in a row is comprised of two factors.
80 * Upper 16 bits represents difference, which is subtracted from the input
81 * value before multiplication and lower 16 bits represents constant, which
82 * is addes at the end.
83 *
84 * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0
85 * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1
86 * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2
87 *
88 * Please note that above formula is true only for Blender CSC. Other DE3 CSC
89 * units takes only positive value for difference. From what can be deducted
90 * from BSP driver code, those units probably automatically assume that
91 * difference has to be subtracted.
92 *
93 * Layout of factors in table:
94 * c00 c01 c02 [d0 const0]
95 * c10 c11 c12 [d1 const1]
96 * c20 c21 c22 [d2 const2]
97 */
98
99static const u32 yuv2rgb_de3[2][2][12] = {
100	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
101		[DRM_COLOR_YCBCR_BT601] = {
102			0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000,
103			0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000,
104			0x0002542A, 0x000408D2, 0x00000000, 0xFE000000,
105		},
106		[DRM_COLOR_YCBCR_BT709] = {
107			0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000,
108			0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000,
109			0x0002542A, 0x0004398C, 0x00000000, 0xFE000000,
110		}
111	},
112	[DRM_COLOR_YCBCR_FULL_RANGE] = {
113		[DRM_COLOR_YCBCR_BT601] = {
114			0x00020000, 0x00000000, 0x0002CDD2, 0x00000000,
115			0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000,
116			0x00020000, 0x00038B43, 0x00000000, 0xFE000000,
117		},
118		[DRM_COLOR_YCBCR_BT709] = {
119			0x00020000, 0x00000000, 0x0003264C, 0x00000000,
120			0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000,
121			0x00020000, 0x0003B611, 0x00000000, 0xFE000000,
122		}
123	},
124};
125
126static const u32 yvu2rgb_de3[2][2][12] = {
127	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
128		[DRM_COLOR_YCBCR_BT601] = {
129			0x0002542A, 0x0003312A, 0x00000000, 0xFFC00000,
130			0x0002542A, 0xFFFE5FC3, 0xFFFF376B, 0xFE000000,
131			0x0002542A, 0x00000000, 0x000408D2, 0xFE000000,
132		},
133		[DRM_COLOR_YCBCR_BT709] = {
134			0x0002542A, 0x000395E2, 0x00000000, 0xFFC00000,
135			0x0002542A, 0xFFFEEF27, 0xFFFF92D2, 0xFE000000,
136			0x0002542A, 0x00000000, 0x0004398C, 0xFE000000,
137		}
138	},
139	[DRM_COLOR_YCBCR_FULL_RANGE] = {
140		[DRM_COLOR_YCBCR_BT601] = {
141			0x00020000, 0x0002CDD2, 0x00000000, 0x00000000,
142			0x00020000, 0xFFFE925D, 0xFFFF4FCE, 0xFE000000,
143			0x00020000, 0x00000000, 0x00038B43, 0xFE000000,
144		},
145		[DRM_COLOR_YCBCR_BT709] = {
146			0x00020000, 0x0003264C, 0x00000000, 0x00000000,
147			0x00020000, 0xFFFF1053, 0xFFFFA018, 0xFE000000,
148			0x00020000, 0x00000000, 0x0003B611, 0xFE000000,
149		}
150	},
151};
152
153static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
154				       enum sun8i_csc_mode mode,
155				       enum drm_color_encoding encoding,
156				       enum drm_color_range range)
157{
158	const u32 *table;
159	u32 base_reg;
160
161	switch (mode) {
162	case SUN8I_CSC_MODE_YUV2RGB:
163		table = yuv2rgb[range][encoding];
164		break;
165	case SUN8I_CSC_MODE_YVU2RGB:
166		table = yvu2rgb[range][encoding];
167		break;
168	default:
169		DRM_WARN("Wrong CSC mode specified.\n");
170		return;
171	}
172
173	base_reg = SUN8I_CSC_COEFF(base, 0);
174	regmap_bulk_write(map, base_reg, table, 12);
175}
176
177static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
178					    enum sun8i_csc_mode mode,
179					    enum drm_color_encoding encoding,
180					    enum drm_color_range range)
181{
182	const u32 *table;
183	u32 base_reg;
184
185	switch (mode) {
186	case SUN8I_CSC_MODE_YUV2RGB:
187		table = yuv2rgb_de3[range][encoding];
188		break;
189	case SUN8I_CSC_MODE_YVU2RGB:
190		table = yvu2rgb_de3[range][encoding];
191		break;
192	default:
193		DRM_WARN("Wrong CSC mode specified.\n");
194		return;
195	}
196
197	base_reg = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0, 0);
198	regmap_bulk_write(map, base_reg, table, 12);
199}
200
201static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
202{
203	u32 val;
204
205	if (enable)
206		val = SUN8I_CSC_CTRL_EN;
207	else
208		val = 0;
209
210	regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val);
211}
212
213static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable)
214{
215	u32 val, mask;
216
217	mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
218
219	if (enable)
220		val = mask;
221	else
222		val = 0;
223
224	regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE),
225			   mask, val);
226}
227
228void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
229				     enum sun8i_csc_mode mode,
230				     enum drm_color_encoding encoding,
231				     enum drm_color_range range)
232{
233	u32 base;
234
235	if (mixer->cfg->is_de3) {
236		sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer,
237						mode, encoding, range);
238		return;
239	}
240
241	base = ccsc_base[mixer->cfg->ccsc][layer];
242
243	sun8i_csc_set_coefficients(mixer->engine.regs, base,
244				   mode, encoding, range);
245}
246
247void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
248{
249	u32 base;
250
251	if (mixer->cfg->is_de3) {
252		sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
253		return;
254	}
255
256	base = ccsc_base[mixer->cfg->ccsc][layer];
257
258	sun8i_csc_enable(mixer->engine.regs, base, enable);
259}
260