1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
new file mode 100644
index 000000000..781955dd4
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -0,0 +1,259 @@
+// 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][2] = {
+	{CCSC00_OFFSET, CCSC01_OFFSET},
+	{CCSC10_OFFSET, CCSC11_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] = {
+			0x000004A8, 0x00000000, 0x00000662, 0xFFFC8451,
+			0x000004A8, 0xFFFFFE6F, 0xFFFFFCC0, 0x00021E4D,
+			0x000004A8, 0x00000811, 0x00000000, 0xFFFBACA9,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x000004A8, 0x00000000, 0x0000072B, 0xFFFC1F99,
+			0x000004A8, 0xFFFFFF26, 0xFFFFFDDF, 0x00013383,
+			0x000004A8, 0x00000873, 0x00000000, 0xFFFB7BEF,
+		}
+	},
+	[DRM_COLOR_YCBCR_FULL_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x00000400, 0x00000000, 0x0000059B, 0xFFFD322E,
+			0x00000400, 0xFFFFFEA0, 0xFFFFFD25, 0x00021DD5,
+			0x00000400, 0x00000716, 0x00000000, 0xFFFC74BD,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x00000400, 0x00000000, 0x0000064C, 0xFFFCD9B4,
+			0x00000400, 0xFFFFFF41, 0xFFFFFE21, 0x00014F96,
+			0x00000400, 0x0000076C, 0x00000000, 0xFFFC49EF,
+		}
+	},
+};
+
+static const u32 yvu2rgb[2][2][12] = {
+	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x000004A8, 0x00000662, 0x00000000, 0xFFFC8451,
+			0x000004A8, 0xFFFFFCC0, 0xFFFFFE6F, 0x00021E4D,
+			0x000004A8, 0x00000000, 0x00000811, 0xFFFBACA9,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x000004A8, 0x0000072B, 0x00000000, 0xFFFC1F99,
+			0x000004A8, 0xFFFFFDDF, 0xFFFFFF26, 0x00013383,
+			0x000004A8, 0x00000000, 0x00000873, 0xFFFB7BEF,
+		}
+	},
+	[DRM_COLOR_YCBCR_FULL_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x00000400, 0x0000059B, 0x00000000, 0xFFFD322E,
+			0x00000400, 0xFFFFFD25, 0xFFFFFEA0, 0x00021DD5,
+			0x00000400, 0x00000000, 0x00000716, 0xFFFC74BD,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x00000400, 0x0000064C, 0x00000000, 0xFFFCD9B4,
+			0x00000400, 0xFFFFFE21, 0xFFFFFF41, 0x00014F96,
+			0x00000400, 0x00000000, 0x0000076C, 0xFFFC49EF,
+		}
+	},
+};
+
+/*
+ * 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][2][12] = {
+	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x0002542A, 0x00000000, 0x0003312A, 0xFFC00000,
+			0x0002542A, 0xFFFF376B, 0xFFFE5FC3, 0xFE000000,
+			0x0002542A, 0x000408D2, 0x00000000, 0xFE000000,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x0002542A, 0x00000000, 0x000395E2, 0xFFC00000,
+			0x0002542A, 0xFFFF92D2, 0xFFFEEF27, 0xFE000000,
+			0x0002542A, 0x0004398C, 0x00000000, 0xFE000000,
+		}
+	},
+	[DRM_COLOR_YCBCR_FULL_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x00020000, 0x00000000, 0x0002CDD2, 0x00000000,
+			0x00020000, 0xFFFF4FCE, 0xFFFE925D, 0xFE000000,
+			0x00020000, 0x00038B43, 0x00000000, 0xFE000000,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x00020000, 0x00000000, 0x0003264C, 0x00000000,
+			0x00020000, 0xFFFFA018, 0xFFFF1053, 0xFE000000,
+			0x00020000, 0x0003B611, 0x00000000, 0xFE000000,
+		}
+	},
+};
+
+static const u32 yvu2rgb_de3[2][2][12] = {
+	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x0002542A, 0x0003312A, 0x00000000, 0xFFC00000,
+			0x0002542A, 0xFFFE5FC3, 0xFFFF376B, 0xFE000000,
+			0x0002542A, 0x00000000, 0x000408D2, 0xFE000000,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x0002542A, 0x000395E2, 0x00000000, 0xFFC00000,
+			0x0002542A, 0xFFFEEF27, 0xFFFF92D2, 0xFE000000,
+			0x0002542A, 0x00000000, 0x0004398C, 0xFE000000,
+		}
+	},
+	[DRM_COLOR_YCBCR_FULL_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x00020000, 0x0002CDD2, 0x00000000, 0x00000000,
+			0x00020000, 0xFFFE925D, 0xFFFF4FCE, 0xFE000000,
+			0x00020000, 0x00000000, 0x00038B43, 0xFE000000,
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x00020000, 0x0003264C, 0x00000000, 0x00000000,
+			0x00020000, 0xFFFF1053, 0xFFFFA018, 0xFE000000,
+			0x00020000, 0x00000000, 0x0003B611, 0xFE000000,
+		}
+	},
+};
+
+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;
+
+	switch (mode) {
+	case SUN8I_CSC_MODE_YUV2RGB:
+		table = yuv2rgb[range][encoding];
+		break;
+	case SUN8I_CSC_MODE_YVU2RGB:
+		table = yvu2rgb[range][encoding];
+		break;
+	default:
+		DRM_WARN("Wrong CSC mode specified.\n");
+		return;
+	}
+
+	base_reg = SUN8I_CSC_COEFF(base, 0);
+	regmap_bulk_write(map, base_reg, table, 12);
+}
+
+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 base_reg;
+
+	switch (mode) {
+	case SUN8I_CSC_MODE_YUV2RGB:
+		table = yuv2rgb_de3[range][encoding];
+		break;
+	case SUN8I_CSC_MODE_YVU2RGB:
+		table = yvu2rgb_de3[range][encoding];
+		break;
+	default:
+		DRM_WARN("Wrong CSC mode specified.\n");
+		return;
+	}
+
+	base_reg = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0, 0);
+	regmap_bulk_write(map, base_reg, table, 12);
+}
+
+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->is_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->is_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);
+}