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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include "komeda_color_mgmt.h"
/* 10bit precision YUV2RGB matrix */
static const s32 yuv2rgb_bt601_narrow[KOMEDA_N_YUV2RGB_COEFFS] = {
1192, 0, 1634,
1192, -401, -832,
1192, 2066, 0,
64, 512, 512
};
static const s32 yuv2rgb_bt601_wide[KOMEDA_N_YUV2RGB_COEFFS] = {
1024, 0, 1436,
1024, -352, -731,
1024, 1815, 0,
0, 512, 512
};
static const s32 yuv2rgb_bt709_narrow[KOMEDA_N_YUV2RGB_COEFFS] = {
1192, 0, 1836,
1192, -218, -546,
1192, 2163, 0,
64, 512, 512
};
static const s32 yuv2rgb_bt709_wide[KOMEDA_N_YUV2RGB_COEFFS] = {
1024, 0, 1613,
1024, -192, -479,
1024, 1900, 0,
0, 512, 512
};
static const s32 yuv2rgb_bt2020[KOMEDA_N_YUV2RGB_COEFFS] = {
1024, 0, 1476,
1024, -165, -572,
1024, 1884, 0,
0, 512, 512
};
const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range)
{
bool narrow = color_range == DRM_COLOR_YCBCR_LIMITED_RANGE;
const s32 *coeffs;
switch (color_encoding) {
case DRM_COLOR_YCBCR_BT709:
coeffs = narrow ? yuv2rgb_bt709_narrow : yuv2rgb_bt709_wide;
break;
case DRM_COLOR_YCBCR_BT601:
coeffs = narrow ? yuv2rgb_bt601_narrow : yuv2rgb_bt601_wide;
break;
case DRM_COLOR_YCBCR_BT2020:
coeffs = yuv2rgb_bt2020;
break;
default:
coeffs = NULL;
break;
}
return coeffs;
}
struct gamma_curve_sector {
u32 boundary_start;
u32 num_of_segments;
u32 segment_width;
};
struct gamma_curve_segment {
u32 start;
u32 end;
};
static struct gamma_curve_sector sector_tbl[] = {
{ 0, 4, 4 },
{ 16, 4, 4 },
{ 32, 4, 8 },
{ 64, 4, 16 },
{ 128, 4, 32 },
{ 256, 4, 64 },
{ 512, 16, 32 },
{ 1024, 24, 128 },
};
static void
drm_lut_to_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs,
struct gamma_curve_sector *sector_tbl, u32 num_sectors)
{
struct drm_color_lut *lut;
u32 i, j, in, num = 0;
if (!lut_blob)
return;
lut = lut_blob->data;
for (i = 0; i < num_sectors; i++) {
for (j = 0; j < sector_tbl[i].num_of_segments; j++) {
in = sector_tbl[i].boundary_start +
j * sector_tbl[i].segment_width;
coeffs[num++] = drm_color_lut_extract(lut[in].red,
KOMEDA_COLOR_PRECISION);
}
}
coeffs[num] = BIT(KOMEDA_COLOR_PRECISION);
}
void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs)
{
drm_lut_to_coeffs(lut_blob, coeffs, sector_tbl, ARRAY_SIZE(sector_tbl));
}
void drm_ctm_to_coeffs(struct drm_property_blob *ctm_blob, u32 *coeffs)
{
struct drm_color_ctm *ctm;
u32 i;
if (!ctm_blob)
return;
ctm = ctm_blob->data;
for (i = 0; i < KOMEDA_N_CTM_COEFFS; i++)
coeffs[i] = drm_color_ctm_s31_32_to_qm_n(ctm->matrix[i], 3, 12);
}
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