diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun8i_csc.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_csc.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c index b14925b40ccf..e7608a72f26f 100644 --- a/drivers/gpu/drm/sun4i/sun8i_csc.c +++ b/drivers/gpu/drm/sun4i/sun8i_csc.c @@ -34,6 +34,41 @@ static const u32 yvu2rgb[] = { 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) { @@ -61,6 +96,28 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base, } } +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; @@ -73,11 +130,32 @@ static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable) 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); @@ -87,6 +165,11 @@ 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); |