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Fri, 11 Oct 2019 05:45:35 +0000 From: "james qian wang (Arm Technology China)" To: Liviu Dudau , "airlied@linux.ie" , Brian Starkey , "maarten.lankhorst@linux.intel.com" , "sean@poorly.run" , "imirkin@alum.mit.edu" CC: "Jonathan Chai (Arm Technology China)" , "Julien Yin (Arm Technology China)" , "Thomas Sun (Arm Technology China)" , "Lowry Li (Arm Technology China)" , Ayan Halder , "Tiannan Zhu (Arm Technology China)" , "Yiqi Kang (Arm Technology China)" , nd , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , Ben Davis , "Oscar Zhang (Arm Technology China)" , "Channing Chen (Arm Technology China)" , Mihail Atanassov , "james qian wang (Arm Technology China)" Subject: [PATCH v2 2/4] drm/komeda: Add drm_lut_to_fgamma_coeffs() Thread-Topic: [PATCH v2 2/4] drm/komeda: Add drm_lut_to_fgamma_coeffs() Thread-Index: AQHVf/cahg9HTk7nnke/u6sXaUorqg== Date: Fri, 11 Oct 2019 05:45:35 +0000 Message-ID: <20191011054459.17984-3-james.qian.wang@arm.com> References: <20191011054459.17984-1-james.qian.wang@arm.com> In-Reply-To: <20191011054459.17984-1-james.qian.wang@arm.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [113.29.88.7] x-clientproxiedby: HK0PR03CA0011.apcprd03.prod.outlook.com (2603:1096:203:2e::23) To VE1PR08MB5006.eurprd08.prod.outlook.com (2603:10a6:803:113::31) Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=james.qian.wang@arm.com; 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Signed-off-by: james qian wang (Arm Technology China) --- .../arm/display/komeda/komeda_color_mgmt.c | 52 +++++++++++++++++++ .../arm/display/komeda/komeda_color_mgmt.h | 9 +++- 2 files changed, 60 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c b/drive= rs/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_encodi= ng, u32 color_range) =20 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[] =3D { + { 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 =3D 0; + + if (!lut_blob) + return; + + lut =3D lut_blob->data; + + for (i =3D 0; i < num_sectors; i++) { + for (j =3D 0; j < sector_tbl[i].num_of_segments; j++) { + in =3D sector_tbl[i].boundary_start + + j * sector_tbl[i].segment_width; + + coeffs[num++] =3D drm_color_lut_extract(lut[in].red, + KOMEDA_COLOR_PRECISION); + } + } + + coeffs[num] =3D BIT(KOMEDA_COLOR_PRECISION); +} + +void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coe= ffs) +{ + 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/drive= rs/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 =20 #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 *coe= ffs); =20 const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_rang= e); =20 -#endif +#endif /*_KOMEDA_COLOR_MGMT_H_*/ --=20 2.20.1