diff options
author | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-12 14:10:09 +0300 |
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committer | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-14 05:29:51 +0300 |
commit | c2b13c650f8640f493849d2503da6fad637e00eb (patch) | |
tree | 0707cb68fca8f30086e7eb073835e9d95106053a /drivers/gpu/drm/arm | |
parent | 7ca7fcef13f494acd6d9c880ee7fb8134ed7d116 (diff) | |
download | linux-c2b13c650f8640f493849d2503da6fad637e00eb.tar.xz |
drm/komeda: Add drm_lut_to_fgamma_coeffs()
This function is used to convert drm color lut to komeda HW required curve
coeffs values.
Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112110927.20931-3-james.qian.wang@arm.com
Diffstat (limited to 'drivers/gpu/drm/arm')
-rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c | 52 | ||||
-rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h | 9 |
2 files changed, 60 insertions, 1 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c index 9d14a92dbb17..c180ce70c26c 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c @@ -65,3 +65,55 @@ const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range) 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)); +} diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h index a2df218f58e7..08ab69281648 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h @@ -11,7 +11,14 @@ #include <drm/drm_color_mgmt.h> #define KOMEDA_N_YUV2RGB_COEFFS 12 +#define KOMEDA_N_RGB2YUV_COEFFS 12 +#define KOMEDA_COLOR_PRECISION 12 +#define KOMEDA_N_GAMMA_COEFFS 65 +#define KOMEDA_COLOR_LUT_SIZE BIT(KOMEDA_COLOR_PRECISION) +#define KOMEDA_N_CTM_COEFFS 9 + +void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs); const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range); -#endif +#endif /*_KOMEDA_COLOR_MGMT_H_*/ |