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 11 static const u32 ccsc_base[][2] = { 12 [CCSC_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_OFFSET}, 13 [CCSC_MIXER1_LAYOUT] = {CCSC10_OFFSET, CCSC11_OFFSET}, 14 [CCSC_D1_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_D1_OFFSET}, 15 }; 16 17 /* 18 * Factors are in two's complement format, 10 bits for fractinal part. 19 * First tree values in each line are multiplication factor and last 20 * value is constant, which is added at the end. 21 */ 22 23 static const u32 yuv2rgb[2][2][12] = { 24 [DRM_COLOR_YCBCR_LIMITED_RANGE] = { 25 [DRM_COLOR_YCBCR_BT601] = { 26 0x000004A8, 0x00000000, 0x00000662, 0xFFFC8451, 27 0x000004A8, 0xFFFFFE6F, 0xFFFFFCC0, 0x00021E4D, 28 0x000004A8, 0x00000811, 0x00000000, 0xFFFBACA9, 29 }, 30 [DRM_COLOR_YCBCR_BT709] = { 31 0x000004A8, 0x00000000, 0x0000072B, 0xFFFC1F99, 32 0x000004A8, 0xFFFFFF26, 0xFFFFFDDF, 0x00013383, 33 0x000004A8, 0x00000873, 0x00000000, 0xFFFB7BEF, 34 } 35 }, 36 [DRM_COLOR_YCBCR_FULL_RANGE] = { 37 [DRM_COLOR_YCBCR_BT601] = { 38 0x00000400, 0x00000000, 0x0000059B, 0xFFFD322E, 39 0x00000400, 0xFFFFFEA0, 0xFFFFFD25, 0x00021DD5, 40 0x00000400, 0x00000716, 0x00000000, 0xFFFC74BD, 41 }, 42 [DRM_COLOR_YCBCR_BT709] = { 43 0x00000400, 0x00000000, 0x0000064C, 0xFFFCD9B4, 44 0x00000400, 0xFFFFFF41, 0xFFFFFE21, 0x00014F96, 45 0x00000400, 0x0000076C, 0x00000000, 0xFFFC49EF, 46 } 47 }, 48 }; 49 50 /* 51 * DE3 has a bit different CSC units. Factors are in two's complement format. 52 * First three factors in a row are multiplication factors which have 17 bits 53 * for fractional part. Fourth value in a row is comprised of two factors. 54 * Upper 16 bits represents difference, which is subtracted from the input 55 * value before multiplication and lower 16 bits represents constant, which 56 * is addes at the end. 57 * 58 * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0 59 * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1 60 * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2 61 * 62 * Please note that above formula is true only for Blender CSC. Other DE3 CSC 63 * units takes only positive value for difference. From what can be deducted 64 * from BSP driver code, those units probably automatically assume that 65 * difference has to be subtracted. 66 * 67 * Layout of factors in table: 68 * c00 c01 c02 [d0 const0] 69 * c10 c11 c12 [d1 const1] 70 * c20 c21 c22 [d2 const2] 71 */ 72 73 static const u32 yuv2rgb_de3[2][3][12] = { 74 [DRM_COLOR_YCBCR_LIMITED_RANGE] = { 75 [DRM_COLOR_YCBCR_BT601] = { 76 0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000, 77 0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000, 78 0x0002542A, 0x000408D2, 0x00000000, 0xFE000000, 79 }, 80 [DRM_COLOR_YCBCR_BT709] = { 81 0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000, 82 0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000, 83 0x0002542A, 0x0004398C, 0x00000000, 0xFE000000, 84 }, 85 [DRM_COLOR_YCBCR_BT2020] = { 86 0x0002542A, 0x00000000, 0x00035B7B, 0xFFC00000, 87 0x0002542A, 0xFFFFA017, 0xFFFEB2FC, 0xFE000000, 88 0x0002542A, 0x00044896, 0x00000000, 0xFE000000, 89 } 90 }, 91 [DRM_COLOR_YCBCR_FULL_RANGE] = { 92 [DRM_COLOR_YCBCR_BT601] = { 93 0x00020000, 0x00000000, 0x0002CDD2, 0x00000000, 94 0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000, 95 0x00020000, 0x00038B43, 0x00000000, 0xFE000000, 96 }, 97 [DRM_COLOR_YCBCR_BT709] = { 98 0x00020000, 0x00000000, 0x0003264C, 0x00000000, 99 0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000, 100 0x00020000, 0x0003B611, 0x00000000, 0xFE000000, 101 }, 102 [DRM_COLOR_YCBCR_BT2020] = { 103 0x00020000, 0x00000000, 0x0002F2FE, 0x00000000, 104 0x00020000, 0xFFFFABC0, 0xFFFEDB78, 0xFE000000, 105 0x00020000, 0x0003C346, 0x00000000, 0xFE000000, 106 } 107 }, 108 }; 109 110 static void sun8i_csc_set_coefficients(struct regmap *map, u32 base, 111 enum sun8i_csc_mode mode, 112 enum drm_color_encoding encoding, 113 enum drm_color_range range) 114 { 115 const u32 *table; 116 u32 base_reg; 117 int i; 118 119 table = yuv2rgb[range][encoding]; 120 121 switch (mode) { 122 case SUN8I_CSC_MODE_YUV2RGB: 123 base_reg = SUN8I_CSC_COEFF(base, 0); 124 regmap_bulk_write(map, base_reg, table, 12); 125 break; 126 case SUN8I_CSC_MODE_YVU2RGB: 127 for (i = 0; i < 12; i++) { 128 if ((i & 3) == 1) 129 base_reg = SUN8I_CSC_COEFF(base, i + 1); 130 else if ((i & 3) == 2) 131 base_reg = SUN8I_CSC_COEFF(base, i - 1); 132 else 133 base_reg = SUN8I_CSC_COEFF(base, i); 134 regmap_write(map, base_reg, table[i]); 135 } 136 break; 137 default: 138 DRM_WARN("Wrong CSC mode specified.\n"); 139 return; 140 } 141 } 142 143 static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer, 144 enum sun8i_csc_mode mode, 145 enum drm_color_encoding encoding, 146 enum drm_color_range range) 147 { 148 const u32 *table; 149 u32 addr; 150 int i; 151 152 table = yuv2rgb_de3[range][encoding]; 153 154 switch (mode) { 155 case SUN8I_CSC_MODE_YUV2RGB: 156 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0); 157 regmap_bulk_write(map, addr, table, 12); 158 break; 159 case SUN8I_CSC_MODE_YVU2RGB: 160 for (i = 0; i < 12; i++) { 161 if ((i & 3) == 1) 162 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 163 layer, 164 i + 1); 165 else if ((i & 3) == 2) 166 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 167 layer, 168 i - 1); 169 else 170 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 171 layer, i); 172 regmap_write(map, addr, table[i]); 173 } 174 break; 175 default: 176 DRM_WARN("Wrong CSC mode specified.\n"); 177 return; 178 } 179 } 180 181 static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable) 182 { 183 u32 val; 184 185 if (enable) 186 val = SUN8I_CSC_CTRL_EN; 187 else 188 val = 0; 189 190 regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val); 191 } 192 193 static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable) 194 { 195 u32 val, mask; 196 197 mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer); 198 199 if (enable) 200 val = mask; 201 else 202 val = 0; 203 204 regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE), 205 mask, val); 206 } 207 208 void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer, 209 enum sun8i_csc_mode mode, 210 enum drm_color_encoding encoding, 211 enum drm_color_range range) 212 { 213 u32 base; 214 215 if (mixer->cfg->is_de3) { 216 sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer, 217 mode, encoding, range); 218 return; 219 } 220 221 base = ccsc_base[mixer->cfg->ccsc][layer]; 222 223 sun8i_csc_set_coefficients(mixer->engine.regs, base, 224 mode, encoding, range); 225 } 226 227 void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable) 228 { 229 u32 base; 230 231 if (mixer->cfg->is_de3) { 232 sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable); 233 return; 234 } 235 236 base = ccsc_base[mixer->cfg->ccsc][layer]; 237 238 sun8i_csc_enable(mixer->engine.regs, base, enable); 239 } 240