// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) Jernej Skrabec */ #include #include "sun8i_csc.h" #include "sun8i_mixer.h" static const u32 ccsc_base[2][2] = { {CCSC00_OFFSET, CCSC01_OFFSET}, {CCSC10_OFFSET, CCSC11_OFFSET}, }; /* * Factors are in two's complement format, 10 bits for fractinal part. * First tree values in each line are multiplication factor and last * value is constant, which is added at the end. */ static const u32 yuv2rgb[2][2][12] = { [DRM_COLOR_YCBCR_LIMITED_RANGE] = { [DRM_COLOR_YCBCR_BT601] = { 0x000004A8, 0x00000000, 0x00000662, 0xFFFC8451, 0x000004A8, 0xFFFFFE6F, 0xFFFFFCC0, 0x00021E4D, 0x000004A8, 0x00000811, 0x00000000, 0xFFFBACA9, }, [DRM_COLOR_YCBCR_BT709] = { 0x000004A8, 0x00000000, 0x0000072B, 0xFFFC1F99, 0x000004A8, 0xFFFFFF26, 0xFFFFFDDF, 0x00013383, 0x000004A8, 0x00000873, 0x00000000, 0xFFFB7BEF, } }, [DRM_COLOR_YCBCR_FULL_RANGE] = { [DRM_COLOR_YCBCR_BT601] = { 0x00000400, 0x00000000, 0x0000059B, 0xFFFD322E, 0x00000400, 0xFFFFFEA0, 0xFFFFFD25, 0x00021DD5, 0x00000400, 0x00000716, 0x00000000, 0xFFFC74BD, }, [DRM_COLOR_YCBCR_BT709] = { 0x00000400, 0x00000000, 0x0000064C, 0xFFFCD9B4, 0x00000400, 0xFFFFFF41, 0xFFFFFE21, 0x00014F96, 0x00000400, 0x0000076C, 0x00000000, 0xFFFC49EF, } }, }; /* * DE3 has a bit different CSC units. Factors are in two's complement format. * First three factors in a row are multiplication factors which have 17 bits * for fractional part. Fourth value in a row is comprised of two factors. * Upper 16 bits represents difference, which is subtracted from the input * value before multiplication and lower 16 bits represents constant, which * is addes at the end. * * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0 * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1 * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2 * * Please note that above formula is true only for Blender CSC. Other DE3 CSC * units takes only positive value for difference. From what can be deducted * from BSP driver code, those units probably automatically assume that * difference has to be subtracted. * * Layout of factors in table: * c00 c01 c02 [d0 const0] * c10 c11 c12 [d1 const1] * c20 c21 c22 [d2 const2] */ static const u32 yuv2rgb_de3[2][3][12] = { [DRM_COLOR_YCBCR_LIMITED_RANGE] = { [DRM_COLOR_YCBCR_BT601] = { 0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000, 0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000, 0x0002542A, 0x000408D2, 0x00000000, 0xFE000000, }, [DRM_COLOR_YCBCR_BT709] = { 0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000, 0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000, 0x0002542A, 0x0004398C, 0x00000000, 0xFE000000, }, [DRM_COLOR_YCBCR_BT2020] = { 0x0002542A, 0x00000000, 0x00035B7B, 0xFFC00000, 0x0002542A, 0xFFFFA017, 0xFFFEB2FC, 0xFE000000, 0x0002542A, 0x00044896, 0x00000000, 0xFE000000, } }, [DRM_COLOR_YCBCR_FULL_RANGE] = { [DRM_COLOR_YCBCR_BT601] = { 0x00020000, 0x00000000, 0x0002CDD2, 0x00000000, 0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000, 0x00020000, 0x00038B43, 0x00000000, 0xFE000000, }, [DRM_COLOR_YCBCR_BT709] = { 0x00020000, 0x00000000, 0x0003264C, 0x00000000, 0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000, 0x00020000, 0x0003B611, 0x00000000, 0xFE000000, }, [DRM_COLOR_YCBCR_BT2020] = { 0x00020000, 0x00000000, 0x0002F2FE, 0x00000000, 0x00020000, 0xFFFFABC0, 0xFFFEDB78, 0xFE000000, 0x00020000, 0x0003C346, 0x00000000, 0xFE000000, } }, }; static void sun8i_csc_set_coefficients(struct regmap *map, u32 base, enum sun8i_csc_mode mode, enum drm_color_encoding encoding, enum drm_color_range range) { const u32 *table; u32 base_reg; int i; table = yuv2rgb[range][encoding]; switch (mode) { case SUN8I_CSC_MODE_YUV2RGB: base_reg = SUN8I_CSC_COEFF(base, 0); regmap_bulk_write(map, base_reg, table, 12); break; case SUN8I_CSC_MODE_YVU2RGB: for (i = 0; i < 12; i++) { if ((i & 3) == 1) base_reg = SUN8I_CSC_COEFF(base, i + 1); else if ((i & 3) == 2) base_reg = SUN8I_CSC_COEFF(base, i - 1); else base_reg = SUN8I_CSC_COEFF(base, i); regmap_write(map, base_reg, table[i]); } break; default: DRM_WARN("Wrong CSC mode specified.\n"); return; } } static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer, enum sun8i_csc_mode mode, enum drm_color_encoding encoding, enum drm_color_range range) { const u32 *table; u32 addr; int i; table = yuv2rgb_de3[range][encoding]; switch (mode) { case SUN8I_CSC_MODE_YUV2RGB: addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0); regmap_bulk_write(map, addr, table, 12); break; case SUN8I_CSC_MODE_YVU2RGB: for (i = 0; i < 12; i++) { if ((i & 3) == 1) addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, i + 1); else if ((i & 3) == 2) addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, i - 1); else addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, i); regmap_write(map, addr, table[i]); } break; default: DRM_WARN("Wrong CSC mode specified.\n"); return; } } static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable) { u32 val; if (enable) val = SUN8I_CSC_CTRL_EN; else val = 0; regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val); } static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable) { u32 val, mask; mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer); if (enable) val = mask; else val = 0; regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE), mask, val); } void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer, enum sun8i_csc_mode mode, enum drm_color_encoding encoding, enum drm_color_range range) { u32 base; if (mixer->cfg->is_de3) { sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer, mode, encoding, range); return; } base = ccsc_base[mixer->cfg->ccsc][layer]; sun8i_csc_set_coefficients(mixer->engine.regs, base, mode, encoding, range); } void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable) { u32 base; if (mixer->cfg->is_de3) { sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable); return; } base = ccsc_base[mixer->cfg->ccsc][layer]; sun8i_csc_enable(mixer->engine.regs, base, enable); }