// 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[] = { 0x000004A8, 0x00000000, 0x00000662, 0xFFFC845A, 0x000004A8, 0xFFFFFE6F, 0xFFFFFCBF, 0x00021DF4, 0x000004A8, 0x00000813, 0x00000000, 0xFFFBAC4A, }; static const u32 yvu2rgb[] = { 0x000004A8, 0x00000662, 0x00000000, 0xFFFC845A, 0x000004A8, 0xFFFFFCBF, 0xFFFFFE6F, 0x00021DF4, 0x000004A8, 0x00000000, 0x00000813, 0xFFFBAC4A, }; /* * 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[] = { 0x0002542a, 0x00000000, 0x0003312a, 0xffc00000, 0x0002542a, 0xffff376b, 0xfffe5fc3, 0xfe000000, 0x0002542a, 0x000408d3, 0x00000000, 0xfe000000, }; static const u32 yvu2rgb_de3[] = { 0x0002542a, 0x0003312a, 0x00000000, 0xffc00000, 0x0002542a, 0xfffe5fc3, 0xffff376b, 0xfe000000, 0x0002542a, 0x00000000, 0x000408d3, 0xfe000000, }; static void sun8i_csc_set_coefficients(struct regmap *map, u32 base, enum sun8i_csc_mode mode) { const u32 *table; int i, data; switch (mode) { case SUN8I_CSC_MODE_YUV2RGB: table = yuv2rgb; break; case SUN8I_CSC_MODE_YVU2RGB: table = yvu2rgb; break; default: DRM_WARN("Wrong CSC mode specified.\n"); return; } for (i = 0; i < 12; i++) { data = table[i]; /* For some reason, 0x200 must be added to constant parts */ if (((i + 1) & 3) == 0) data += 0x200; regmap_write(map, SUN8I_CSC_COEFF(base, i), data); } } static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer, enum sun8i_csc_mode mode) { const u32 *table; u32 base_reg; switch (mode) { case SUN8I_CSC_MODE_YUV2RGB: table = yuv2rgb_de3; break; case SUN8I_CSC_MODE_YVU2RGB: table = yvu2rgb_de3; break; default: DRM_WARN("Wrong CSC mode specified.\n"); return; } base_reg = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0, 0); regmap_bulk_write(map, base_reg, table, 12); } 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) { u32 base; if (mixer->cfg->is_de3) { sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer, mode); return; } base = ccsc_base[mixer->cfg->ccsc][layer]; sun8i_csc_set_coefficients(mixer->engine.regs, base, mode); } 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); }