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-rw-r--r--drivers/gpu/drm/sun4i/Makefile2
-rw-r--r--drivers/gpu/drm/sun4i/sun8i_csc.c93
-rw-r--r--drivers/gpu/drm/sun4i/sun8i_csc.h36
3 files changed, 130 insertions, 1 deletions
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index a458ddbf4a8e..82a6ac57fbe3 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -11,7 +11,7 @@ sun4i-drm-hdmi-y += sun4i_hdmi_tmds_clk.o
sun8i-mixer-y += sun8i_mixer.o sun8i_ui_layer.o \
sun8i_vi_layer.o sun8i_ui_scaler.o \
- sun8i_vi_scaler.o
+ sun8i_vi_scaler.o sun8i_csc.o
sun4i-tcon-y += sun4i_crtc.o
sun4i-tcon-y += sun4i_dotclock.o
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
new file mode 100644
index 000000000000..b14925b40ccf
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@siol.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drmP.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[] = {
+ 0x000004A8, 0x00000000, 0x00000662, 0xFFFC845A,
+ 0x000004A8, 0xFFFFFE6F, 0xFFFFFCBF, 0x00021DF4,
+ 0x000004A8, 0x00000813, 0x00000000, 0xFFFBAC4A,
+};
+
+static const u32 yvu2rgb[] = {
+ 0x000004A8, 0x00000662, 0x00000000, 0xFFFC845A,
+ 0x000004A8, 0xFFFFFCBF, 0xFFFFFE6F, 0x00021DF4,
+ 0x000004A8, 0x00000000, 0x00000813, 0xFFFBAC4A,
+};
+
+static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
+ enum sun8i_csc_mode mode)
+{
+ const u32 *table;
+ int i, data;
+
+ switch (mode) {
+ case SUN8I_CSC_MODE_YUV2RGB:
+ table = yuv2rgb;
+ break;
+ case SUN8I_CSC_MODE_YVU2RGB:
+ table = yvu2rgb;
+ break;
+ default:
+ DRM_WARN("Wrong CSC mode specified.\n");
+ return;
+ }
+
+ for (i = 0; i < 12; i++) {
+ data = table[i];
+ /* For some reason, 0x200 must be added to constant parts */
+ if (((i + 1) & 3) == 0)
+ data += 0x200;
+ regmap_write(map, SUN8I_CSC_COEFF(base, i), data);
+ }
+}
+
+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);
+}
+
+void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
+ enum sun8i_csc_mode mode)
+{
+ u32 base;
+
+ base = ccsc_base[mixer->cfg->ccsc][layer];
+
+ sun8i_csc_set_coefficients(mixer->engine.regs, base, mode);
+}
+
+void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
+{
+ u32 base;
+
+ base = ccsc_base[mixer->cfg->ccsc][layer];
+
+ sun8i_csc_enable(mixer->engine.regs, base, enable);
+}
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
new file mode 100644
index 000000000000..880e8fbb0855
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@siol.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN8I_CSC_H_
+#define _SUN8I_CSC_H_
+
+struct sun8i_mixer;
+
+/* VI channel CSC units offsets */
+#define CCSC00_OFFSET 0xAA050
+#define CCSC01_OFFSET 0xFA000
+#define CCSC10_OFFSET 0xA0000
+#define CCSC11_OFFSET 0xF0000
+
+#define SUN8I_CSC_CTRL(base) (base + 0x0)
+#define SUN8I_CSC_COEFF(base, i) (base + 0x10 + 4 * i)
+
+#define SUN8I_CSC_CTRL_EN BIT(0)
+
+enum sun8i_csc_mode {
+ SUN8I_CSC_MODE_OFF,
+ SUN8I_CSC_MODE_YUV2RGB,
+ SUN8I_CSC_MODE_YVU2RGB,
+};
+
+void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
+ enum sun8i_csc_mode mode);
+void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable);
+
+#endif