// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright ( C ) Jernej Skrabec < jernej . skrabec @ siol . net >
*/
#include <drm/drm_print.h>
#include "sun8i_csc.h"
#include "sun8i_mixer.h"
static const u32 ccsc_base[][2 ] = {
[CCSC_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_OFFSET},
[CCSC_MIXER1_LAYOUT] = {CCSC10_OFFSET, CCSC11_OFFSET},
[CCSC_D1_MIXER0_LAYOUT] = {CCSC00_OFFSET, CCSC01_D1_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] = {
0 x000004A8, 0 x00000000, 0 x00000662, 0 xFFFC8451,
0 x000004A8, 0 xFFFFFE6F, 0 xFFFFFCC0, 0 x00021E4D,
0 x000004A8, 0 x00000811, 0 x00000000, 0 xFFFBACA9,
},
[DRM_COLOR_YCBCR_BT709] = {
0 x000004A8, 0 x00000000, 0 x0000072B, 0 xFFFC1F99,
0 x000004A8, 0 xFFFFFF26, 0 xFFFFFDDF, 0 x00013383,
0 x000004A8, 0 x00000873, 0 x00000000, 0 xFFFB7BEF,
}
},
[DRM_COLOR_YCBCR_FULL_RANGE] = {
[DRM_COLOR_YCBCR_BT601] = {
0 x00000400, 0 x00000000, 0 x0000059B, 0 xFFFD322E,
0 x00000400, 0 xFFFFFEA0, 0 xFFFFFD25, 0 x00021DD5,
0 x00000400, 0 x00000716, 0 x00000000, 0 xFFFC74BD,
},
[DRM_COLOR_YCBCR_BT709] = {
0 x00000400, 0 x00000000, 0 x0000064C, 0 xFFFCD9B4,
0 x00000400, 0 xFFFFFF41, 0 xFFFFFE21, 0 x00014F96,
0 x00000400, 0 x0000076C, 0 x00000000, 0 xFFFC49EF,
}
},
};
/*
* 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] = {
0 x0002542A, 0 x00000000, 0 x0003312A, 0 xFFC00000,
0 x0002542A, 0 xFFFF376B, 0 xFFFE5FC3, 0 xFE000000,
0 x0002542A, 0 x000408D2, 0 x00000000, 0 xFE000000,
},
[DRM_COLOR_YCBCR_BT709] = {
0 x0002542A, 0 x00000000, 0 x000395E2, 0 xFFC00000,
0 x0002542A, 0 xFFFF92D2, 0 xFFFEEF27, 0 xFE000000,
0 x0002542A, 0 x0004398C, 0 x00000000, 0 xFE000000,
},
[DRM_COLOR_YCBCR_BT2020] = {
0 x0002542A, 0 x00000000, 0 x00035B7B, 0 xFFC00000,
0 x0002542A, 0 xFFFFA017, 0 xFFFEB2FC, 0 xFE000000,
0 x0002542A, 0 x00044896, 0 x00000000, 0 xFE000000,
}
},
[DRM_COLOR_YCBCR_FULL_RANGE] = {
[DRM_COLOR_YCBCR_BT601] = {
0 x00020000, 0 x00000000, 0 x0002CDD2, 0 x00000000,
0 x00020000, 0 xFFFF4FCE, 0 xFFFE925D, 0 xFE000000,
0 x00020000, 0 x00038B43, 0 x00000000, 0 xFE000000,
},
[DRM_COLOR_YCBCR_BT709] = {
0 x00020000, 0 x00000000, 0 x0003264C, 0 x00000000,
0 x00020000, 0 xFFFFA018, 0 xFFFF1053, 0 xFE000000,
0 x00020000, 0 x0003B611, 0 x00000000, 0 xFE000000,
},
[DRM_COLOR_YCBCR_BT2020] = {
0 x00020000, 0 x00000000, 0 x0002F2FE, 0 x00000000,
0 x00020000, 0 xFFFFABC0, 0 xFFFEDB78, 0 xFE000000,
0 x00020000, 0 x0003C346, 0 x00000000, 0 xFE000000,
}
},
};
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->de_type == SUN8I_MIXER_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->de_type == SUN8I_MIXER_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);
}
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(vorverarbeitet am 2026-09-29)
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