[PATCH v6 02/27] drm: sun4i: de2/de3: Merge CSC functions into one

[Ryan Walklin <ryan@testtoast.com>]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

At the moment the colour space conversion is handled by two functions:
one to setup the conversion parameters, and another one to enable the
conversion. Merging both into one gives more flexibility for upcoming
extensions to support whole YUV pipelines, in the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c      | 89 ++++++++++----------------
 drivers/gpu/drm/sun4i/sun8i_csc.h      |  9 ++-
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 11 +---
 3 files changed, 40 insertions(+), 69 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index a96de701c3304..5606912f92de5 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -107,23 +107,28 @@ static const u32 yuv2rgb_de3[2][3][12] = {
 	},
 };
 
-static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
-				       enum sun8i_format_type fmt_type,
-				       enum drm_color_encoding encoding,
-				       enum drm_color_range range)
+static void sun8i_csc_setup(struct regmap *map, u32 base,
+			    enum sun8i_format_type fmt_type,
+			    enum drm_color_encoding encoding,
+			    enum drm_color_range range)
 {
+	u32 base_reg, val;
 	const u32 *table;
-	u32 base_reg;
 	int i;
 
 	table = yuv2rgb[range][encoding];
 
 	switch (fmt_type) {
+	case FORMAT_TYPE_RGB:
+		val = 0;
+		break;
 	case FORMAT_TYPE_YUV:
+		val = SUN8I_CSC_CTRL_EN;
 		base_reg = SUN8I_CSC_COEFF(base, 0);
 		regmap_bulk_write(map, base_reg, table, 12);
 		break;
 	case FORMAT_TYPE_YVU:
+		val = SUN8I_CSC_CTRL_EN;
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				base_reg = SUN8I_CSC_COEFF(base, i + 1);
@@ -135,28 +140,37 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
 		}
 		break;
 	default:
+		val = 0;
 		DRM_WARN("Wrong CSC mode specified.\n");
 		return;
 	}
+
+	regmap_write(map, SUN8I_CSC_CTRL(base), val);
 }
 
-static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
-					    enum sun8i_format_type fmt_type,
-					    enum drm_color_encoding encoding,
-					    enum drm_color_range range)
+static void sun8i_de3_ccsc_setup(struct regmap *map, int layer,
+				 enum sun8i_format_type fmt_type,
+				 enum drm_color_encoding encoding,
+				 enum drm_color_range range)
 {
+	u32 addr, val, mask;
 	const u32 *table;
-	u32 addr;
 	int i;
 
+	mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
 	table = yuv2rgb_de3[range][encoding];
 
 	switch (fmt_type) {
+	case FORMAT_TYPE_RGB:
+		val = 0;
+		break;
 	case FORMAT_TYPE_YUV:
+		val = mask;
 		addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
 		regmap_bulk_write(map, addr, table, 12);
 		break;
 	case FORMAT_TYPE_YVU:
+		val = mask;
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
@@ -173,67 +187,30 @@ static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
 		}
 		break;
 	default:
+		val = 0;
 		DRM_WARN("Wrong CSC mode specified.\n");
 		return;
 	}
-}
-
-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_format_type fmt_type,
-				     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,
-						fmt_type, encoding, range);
-		return;
-	}
-
-	base = ccsc_base[mixer->cfg->ccsc][layer];
-
-	sun8i_csc_set_coefficients(mixer->engine.regs, base,
-				   fmt_type, encoding, range);
-}
-
-void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
+void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
+			enum sun8i_format_type fmt_type,
+			enum drm_color_encoding encoding,
+			enum drm_color_range range)
 {
 	u32 base;
 
 	if (mixer->cfg->is_de3) {
-		sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
+		sun8i_de3_ccsc_setup(mixer->engine.regs, layer,
+				     fmt_type, encoding, range);
 		return;
 	}
 
 	base = ccsc_base[mixer->cfg->ccsc][layer];
 
-	sun8i_csc_enable(mixer->engine.regs, base, enable);
+	sun8i_csc_setup(mixer->engine.regs, base,
+			fmt_type, encoding, range);
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
index e35e0ac951022..9b63c92782f56 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.h
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
@@ -28,10 +28,9 @@ enum sun8i_format_type {
 	FORMAT_TYPE_YVU,
 };
 
-void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
-				     enum sun8i_format_type fmt_type,
-				     enum drm_color_encoding encoding,
-				     enum drm_color_range range);
-void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable);
+void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
+			enum sun8i_format_type fmt_type,
+			enum drm_color_encoding encoding,
+			enum drm_color_range range);
 
 #endif
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 8a80934e928fe..f3a5329351caa 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -232,14 +232,9 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK, val);
 
 	fmt_type = sun8i_vi_layer_get_format_type(fmt);
-	if (fmt_type != FORMAT_TYPE_RGB) {
-		sun8i_csc_set_ccsc_coefficients(mixer, channel, fmt_type,
-						state->color_encoding,
-						state->color_range);
-		sun8i_csc_enable_ccsc(mixer, channel, true);
-	} else {
-		sun8i_csc_enable_ccsc(mixer, channel, false);
-	}
+	sun8i_csc_set_ccsc(mixer, channel, fmt_type,
+			   state->color_encoding,
+			   state->color_range);
 
 	if (!fmt->is_yuv)
 		val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE;
-- 
2.48.1