drivers/gpu/drm/sun4i/sun8i_csc.c

   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][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
  22 static 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 static 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
  99 static 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
 126 static 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
 153 static 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
 177 static 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
 201 static 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
 213 static 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
 228 void 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
 247 void 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 }