drm/komeda: Add drm_lut_to_fgamma_coeffs() (c2b13c65) · Commits · 戴 / test

drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c

+52 −0

Original line number	Diff line number	Diff line
		@@ -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));
		}

+8 −1

Original line number	Diff line number	Diff line
		@@ -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_/