drm/i915: Clean up 12.4bit precision palette defines

Use consistent bit definitions for the 12.4bit precision palette bits.
We just define these alongside the ilk/snb register definitions and
point to those from the icl+ superfine segment defines (and we also
already pointed to them from the ivb+ precision palette defines).

Also use the these appropriately in the LUT entry pack/unpack
functions.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-4-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_color.c

@@ -486,25 +486,27 @@ static void ilk_lut_10_pack(struct drm_color_lut *entry, u32 val)
 /* ilk+ "12.4" interpolated format (high 10 bits) */
 static u32 ilk_lut_12p4_udw(const struct drm_color_lut *color)
 {
-	return (color->red >> 6) << 20 | (color->green >> 6) << 10 |
-		(color->blue >> 6);
+	return REG_FIELD_PREP(PREC_PALETTE_12P4_RED_UDW_MASK, color->red >> 6) |
+		REG_FIELD_PREP(PREC_PALETTE_12P4_GREEN_UDW_MASK, color->green >> 6) |
+		REG_FIELD_PREP(PREC_PALETTE_12P4_BLUE_UDW_MASK, color->blue >> 6);
 }
 
 /* ilk+ "12.4" interpolated format (low 6 bits) */
 static u32 ilk_lut_12p4_ldw(const struct drm_color_lut *color)
 {
-	return (color->red & 0x3f) << 24 | (color->green & 0x3f) << 14 |
-		(color->blue & 0x3f) << 4;
+	return REG_FIELD_PREP(PREC_PALETTE_12P4_RED_LDW_MASK, color->red & 0x3f) |
+		REG_FIELD_PREP(PREC_PALETTE_12P4_GREEN_LDW_MASK, color->green & 0x3f) |
+		REG_FIELD_PREP(PREC_PALETTE_12P4_BLUE_LDW_MASK, color->blue & 0x3f);
 }
 
 static void ilk_lut_12p4_pack(struct drm_color_lut *entry, u32 ldw, u32 udw)
 {
-	entry->red = REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_UDW_MASK, udw) << 6 |
-		REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_LDW_MASK, ldw);
-	entry->green = REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_UDW_MASK, udw) << 6 |
-		REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_LDW_MASK, ldw);
-	entry->blue = REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_UDW_MASK, udw) << 6 |
-		REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_LDW_MASK, ldw);
+	entry->red = REG_FIELD_GET(PREC_PALETTE_12P4_RED_UDW_MASK, udw) << 6 |
+		REG_FIELD_GET(PREC_PALETTE_12P4_RED_LDW_MASK, ldw);
+	entry->green = REG_FIELD_GET(PREC_PALETTE_12P4_GREEN_UDW_MASK, udw) << 6 |
+		REG_FIELD_GET(PREC_PALETTE_12P4_GREEN_LDW_MASK, ldw);
+	entry->blue = REG_FIELD_GET(PREC_PALETTE_12P4_BLUE_UDW_MASK, udw) << 6 |
+		REG_FIELD_GET(PREC_PALETTE_12P4_BLUE_LDW_MASK, ldw);
 }
 
 static void icl_color_commit_noarm(const struct intel_crtc_state *crtc_state)

drivers/gpu/drm/i915/i915_reg.h

@@ -5317,6 +5317,14 @@
 #define   PREC_PALETTE_10_RED_MASK		REG_GENMASK(29, 20)
 #define   PREC_PALETTE_10_GREEN_MASK		REG_GENMASK(19, 10)
 #define   PREC_PALETTE_10_BLUE_MASK		REG_GENMASK(9, 0)
+/* 12.4 interpolated mode ldw */
+#define   PREC_PALETTE_12P4_RED_LDW_MASK	REG_GENMASK(29, 24)
+#define   PREC_PALETTE_12P4_GREEN_LDW_MASK	REG_GENMASK(19, 14)
+#define   PREC_PALETTE_12P4_BLUE_LDW_MASK	REG_GENMASK(9, 4)
+/* 12.4 interpolated mode udw */
+#define   PREC_PALETTE_12P4_RED_UDW_MASK	REG_GENMASK(29, 20)
+#define   PREC_PALETTE_12P4_GREEN_UDW_MASK	REG_GENMASK(19, 10)
+#define   PREC_PALETTE_12P4_BLUE_UDW_MASK	REG_GENMASK(9, 0)
 #define PREC_PALETTE(pipe, i) _MMIO(_PIPE(pipe, _PREC_PALETTE_A, _PREC_PALETTE_B) + (i) * 4)
 
 #define  _PREC_PIPEAGCMAX              0x4d000
@@ -7582,12 +7590,7 @@ enum skl_power_gate {
 
 #define _PAL_PREC_MULTI_SEG_DATA_A	0x4A40C
 #define _PAL_PREC_MULTI_SEG_DATA_B	0x4AC0C
-#define  PAL_PREC_MULTI_SEG_RED_LDW_MASK   REG_GENMASK(29, 24)
-#define  PAL_PREC_MULTI_SEG_RED_UDW_MASK   REG_GENMASK(29, 20)
-#define  PAL_PREC_MULTI_SEG_GREEN_LDW_MASK REG_GENMASK(19, 14)
-#define  PAL_PREC_MULTI_SEG_GREEN_UDW_MASK REG_GENMASK(19, 10)
-#define  PAL_PREC_MULTI_SEG_BLUE_LDW_MASK  REG_GENMASK(9, 4)
-#define  PAL_PREC_MULTI_SEG_BLUE_UDW_MASK  REG_GENMASK(9, 0)
+/* see PREC_PALETTE_12P4_* for the bits */
 
 #define PREC_PAL_MULTI_SEG_INDEX(pipe)	_MMIO_PIPE(pipe, \
 					_PAL_PREC_MULTI_SEG_INDEX_A, \