drm/sun4i: Rename some macros in DE2 driver

Now that some knowledge of DE2 is gained, rename or add some macros to
make code more readable.

Max channel macro is removed, since it is not used and it is not clear
if it has right value. Structures in BSP driver shows possibility of 5
channels maximum although there is no SoC with such configuration.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171201060550.10392-9-jernej.skrabec@siol.net

drivers/gpu/drm/sun4i/sun8i_mixer.c

@@ -323,8 +323,9 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 		     SUN8I_MIXER_BLEND_COLOR_BLACK);
 
 	/* Initialize blender */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_FCOLOR_CTL,
-		     SUN8I_MIXER_BLEND_FCOLOR_CTL_DEF);
+	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL,
+		     SUN8I_MIXER_BLEND_PIPE_CTL_EN(0) |
+		     SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
 
 	regmap_write(mixer->engine.regs,
 		     SUN8I_MIXER_BLEND_ATTR_FCOLOR(0),

drivers/gpu/drm/sun4i/sun8i_mixer.h

@@ -16,8 +16,6 @@
 
 #include "sunxi_engine.h"
 
-#define SUN8I_MIXER_MAX_CHAN_COUNT		4
-
 #define SUN8I_MIXER_SIZE(w, h)			(((h) - 1) << 16 | ((w) - 1))
 #define SUN8I_MIXER_COORD(x, y)			((y) << 16 | (x))
 
@@ -26,14 +24,14 @@
 #define SUN8I_MIXER_GLOBAL_DBUFF		0x8
 #define SUN8I_MIXER_GLOBAL_SIZE			0xc
 
-#define SUN8I_MIXER_GLOBAL_CTL_RT_EN		0x1
+#define SUN8I_MIXER_GLOBAL_CTL_RT_EN		BIT(0)
 
-#define SUN8I_MIXER_GLOBAL_DBUFF_ENABLE		0x1
+#define SUN8I_MIXER_GLOBAL_DBUFF_ENABLE		BIT(0)
 
-#define SUN8I_MIXER_BLEND_FCOLOR_CTL		0x1000
+#define SUN8I_MIXER_BLEND_PIPE_CTL		0x1000
 #define SUN8I_MIXER_BLEND_ATTR_FCOLOR(x)	(0x1004 + 0x10 * (x) + 0x0)
 #define SUN8I_MIXER_BLEND_ATTR_INSIZE(x)	(0x1004 + 0x10 * (x) + 0x4)
-#define SUN8I_MIXER_BLEND_ATTR_OFFSET(x)	(0x1004 + 0x10 * (x) + 0x8)
+#define SUN8I_MIXER_BLEND_ATTR_COORD(x)		(0x1004 + 0x10 * (x) + 0x8)
 #define SUN8I_MIXER_BLEND_ROUTE			0x1080
 #define SUN8I_MIXER_BLEND_PREMULTIPLY		0x1084
 #define SUN8I_MIXER_BLEND_BKCOLOR		0x1088
@@ -45,10 +43,11 @@
 #define SUN8I_MIXER_BLEND_CK_MIN(x)		(0x10e0 + 0x04 * (x))
 #define SUN8I_MIXER_BLEND_OUTCTL		0x10fc
 
+#define SUN8I_MIXER_BLEND_PIPE_CTL_EN(pipe)	BIT(8 + pipe)
+#define SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(pipe)	BIT(pipe)
 /* colors are always in AARRGGBB format */
 #define SUN8I_MIXER_BLEND_COLOR_BLACK		0xff000000
 /* The following numbers are some still unknown magic numbers */
-#define SUN8I_MIXER_BLEND_FCOLOR_CTL_DEF	0x00000101
 #define SUN8I_MIXER_BLEND_MODE_DEF		0x03010301
 
 #define SUN8I_MIXER_BLEND_OUTCTL_INTERLACED	BIT(1)