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_fourcc.h> 7 #include <drm/drm_framebuffer.h> 8 #include <drm/drm_plane.h> 9 #include <drm/drm_print.h> 10 11 #include "sun8i_csc.h" 12 #include "sun8i_mixer.h" 13 14 enum sun8i_csc_mode { 15 SUN8I_CSC_MODE_OFF, 16 SUN8I_CSC_MODE_YUV2RGB, 17 SUN8I_CSC_MODE_YVU2RGB, 18 }; 19 20 static const u32 ccsc_base[][2] = { 21 [CCSC_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_OFFSET}, 22 [CCSC_MIXER1_LAYOUT] = {CCSC10_OFFSET, CCSC11_OFFSET}, 23 [CCSC_D1_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_D1_OFFSET}, 24 }; 25 26 /* 27 * Factors are in two's complement format, 10 bits for fractinal part. 28 * First tree values in each line are multiplication factor and last 29 * value is constant, which is added at the end. 30 */ 31 32 static const u32 yuv2rgb[2][2][12] = { 33 [DRM_COLOR_YCBCR_LIMITED_RANGE] = { 34 [DRM_COLOR_YCBCR_BT601] = { 35 0x000004A8, 0x00000000, 0x00000662, 0xFFFC8451, 36 0x000004A8, 0xFFFFFE6F, 0xFFFFFCC0, 0x00021E4D, 37 0x000004A8, 0x00000811, 0x00000000, 0xFFFBACA9, 38 }, 39 [DRM_COLOR_YCBCR_BT709] = { 40 0x000004A8, 0x00000000, 0x0000072B, 0xFFFC1F99, 41 0x000004A8, 0xFFFFFF26, 0xFFFFFDDF, 0x00013383, 42 0x000004A8, 0x00000873, 0x00000000, 0xFFFB7BEF, 43 } 44 }, 45 [DRM_COLOR_YCBCR_FULL_RANGE] = { 46 [DRM_COLOR_YCBCR_BT601] = { 47 0x00000400, 0x00000000, 0x0000059B, 0xFFFD322E, 48 0x00000400, 0xFFFFFEA0, 0xFFFFFD25, 0x00021DD5, 49 0x00000400, 0x00000716, 0x00000000, 0xFFFC74BD, 50 }, 51 [DRM_COLOR_YCBCR_BT709] = { 52 0x00000400, 0x00000000, 0x0000064C, 0xFFFCD9B4, 53 0x00000400, 0xFFFFFF41, 0xFFFFFE21, 0x00014F96, 54 0x00000400, 0x0000076C, 0x00000000, 0xFFFC49EF, 55 } 56 }, 57 }; 58 59 /* 60 * DE3 has a bit different CSC units. Factors are in two's complement format. 61 * First three factors in a row are multiplication factors which have 17 bits 62 * for fractional part. Fourth value in a row is comprised of two factors. 63 * Upper 16 bits represents difference, which is subtracted from the input 64 * value before multiplication and lower 16 bits represents constant, which 65 * is addes at the end. 66 * 67 * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0 68 * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1 69 * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2 70 * 71 * Please note that above formula is true only for Blender CSC. Other DE3 CSC 72 * units takes only positive value for difference. From what can be deducted 73 * from BSP driver code, those units probably automatically assume that 74 * difference has to be subtracted. 75 * 76 * Layout of factors in table: 77 * c00 c01 c02 [d0 const0] 78 * c10 c11 c12 [d1 const1] 79 * c20 c21 c22 [d2 const2] 80 */ 81 82 static const u32 yuv2rgb_de3[2][3][12] = { 83 [DRM_COLOR_YCBCR_LIMITED_RANGE] = { 84 [DRM_COLOR_YCBCR_BT601] = { 85 0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000, 86 0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000, 87 0x0002542A, 0x000408D2, 0x00000000, 0xFE000000, 88 }, 89 [DRM_COLOR_YCBCR_BT709] = { 90 0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000, 91 0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000, 92 0x0002542A, 0x0004398C, 0x00000000, 0xFE000000, 93 }, 94 [DRM_COLOR_YCBCR_BT2020] = { 95 0x0002542A, 0x00000000, 0x00035B7B, 0xFFC00000, 96 0x0002542A, 0xFFFFA017, 0xFFFEB2FC, 0xFE000000, 97 0x0002542A, 0x00044896, 0x00000000, 0xFE000000, 98 } 99 }, 100 [DRM_COLOR_YCBCR_FULL_RANGE] = { 101 [DRM_COLOR_YCBCR_BT601] = { 102 0x00020000, 0x00000000, 0x0002CDD2, 0x00000000, 103 0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000, 104 0x00020000, 0x00038B43, 0x00000000, 0xFE000000, 105 }, 106 [DRM_COLOR_YCBCR_BT709] = { 107 0x00020000, 0x00000000, 0x0003264C, 0x00000000, 108 0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000, 109 0x00020000, 0x0003B611, 0x00000000, 0xFE000000, 110 }, 111 [DRM_COLOR_YCBCR_BT2020] = { 112 0x00020000, 0x00000000, 0x0002F2FE, 0x00000000, 113 0x00020000, 0xFFFFABC0, 0xFFFEDB78, 0xFE000000, 114 0x00020000, 0x0003C346, 0x00000000, 0xFE000000, 115 } 116 }, 117 }; 118 119 static void sun8i_csc_setup(struct regmap *map, u32 base, 120 enum sun8i_csc_mode mode, 121 enum drm_color_encoding encoding, 122 enum drm_color_range range) 123 { 124 u32 base_reg, val; 125 const u32 *table; 126 int i; 127 128 table = yuv2rgb[range][encoding]; 129 130 switch (mode) { 131 case SUN8I_CSC_MODE_OFF: 132 val = 0; 133 break; 134 case SUN8I_CSC_MODE_YUV2RGB: 135 val = SUN8I_CSC_CTRL_EN; 136 base_reg = SUN8I_CSC_COEFF(base, 0); 137 regmap_bulk_write(map, base_reg, table, 12); 138 break; 139 case SUN8I_CSC_MODE_YVU2RGB: 140 val = SUN8I_CSC_CTRL_EN; 141 for (i = 0; i < 12; i++) { 142 if ((i & 3) == 1) 143 base_reg = SUN8I_CSC_COEFF(base, i + 1); 144 else if ((i & 3) == 2) 145 base_reg = SUN8I_CSC_COEFF(base, i - 1); 146 else 147 base_reg = SUN8I_CSC_COEFF(base, i); 148 regmap_write(map, base_reg, table[i]); 149 } 150 break; 151 default: 152 val = 0; 153 DRM_WARN("Wrong CSC mode specified.\n"); 154 return; 155 } 156 157 regmap_write(map, SUN8I_CSC_CTRL(base), val); 158 } 159 160 static void sun8i_de3_ccsc_setup(struct regmap *map, int layer, 161 enum sun8i_csc_mode mode, 162 enum drm_color_encoding encoding, 163 enum drm_color_range range) 164 { 165 u32 addr, val, mask; 166 const u32 *table; 167 int i; 168 169 mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer); 170 table = yuv2rgb_de3[range][encoding]; 171 172 switch (mode) { 173 case SUN8I_CSC_MODE_OFF: 174 val = 0; 175 break; 176 case SUN8I_CSC_MODE_YUV2RGB: 177 val = mask; 178 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0); 179 regmap_bulk_write(map, addr, table, 12); 180 break; 181 case SUN8I_CSC_MODE_YVU2RGB: 182 val = mask; 183 for (i = 0; i < 12; i++) { 184 if ((i & 3) == 1) 185 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 186 layer, 187 i + 1); 188 else if ((i & 3) == 2) 189 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 190 layer, 191 i - 1); 192 else 193 addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, 194 layer, i); 195 regmap_write(map, addr, table[i]); 196 } 197 break; 198 default: 199 val = 0; 200 DRM_WARN("Wrong CSC mode specified.\n"); 201 return; 202 } 203 204 regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE), 205 mask, val); 206 } 207 208 static u32 sun8i_csc_get_mode(struct drm_plane_state *state) 209 { 210 const struct drm_format_info *format; 211 212 if (!state->crtc || !state->visible) 213 return SUN8I_CSC_MODE_OFF; 214 215 format = state->fb->format; 216 if (!format->is_yuv) 217 return SUN8I_CSC_MODE_OFF; 218 219 switch (format->format) { 220 case DRM_FORMAT_YVU411: 221 case DRM_FORMAT_YVU420: 222 case DRM_FORMAT_YVU422: 223 case DRM_FORMAT_YVU444: 224 return SUN8I_CSC_MODE_YVU2RGB; 225 default: 226 return SUN8I_CSC_MODE_YUV2RGB; 227 } 228 } 229 230 void sun8i_csc_config(struct sun8i_layer *layer, 231 struct drm_plane_state *state) 232 { 233 u32 mode = sun8i_csc_get_mode(state); 234 u32 base; 235 236 if (layer->cfg->de_type == SUN8I_MIXER_DE3) { 237 sun8i_de3_ccsc_setup(layer->regs, layer->channel, 238 mode, state->color_encoding, 239 state->color_range); 240 return; 241 } 242 243 base = ccsc_base[layer->cfg->ccsc][layer->channel]; 244 245 sun8i_csc_setup(layer->regs, base, 246 mode, state->color_encoding, 247 state->color_range); 248 } 249