drm/i915/ddi: Sanitize DDI_BUF_CTL register definitions

Align the DDI_BUF_CTL register flag definitions with how this is done
elsewhere.

v2: Robustify macro calls with parens. (Jani)

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250214142001.552916-12-imre.deak@intel.com

Author: ideak

drivers/gpu/drm/i915/i915_reg.h

@@ -3625,27 +3625,29 @@ enum skl_power_gate {
 #define _DDI_BUF_CTL_B				0x64100
 /* Known as DDI_CTL_DE in MTL+ */
 #define DDI_BUF_CTL(port) _MMIO_PORT(port, _DDI_BUF_CTL_A, _DDI_BUF_CTL_B)
-#define  DDI_BUF_CTL_ENABLE			(1 << 31)
+#define  DDI_BUF_CTL_ENABLE			REG_BIT(31)
 #define  XE2LPD_DDI_BUF_D2D_LINK_ENABLE		REG_BIT(29)
 #define  XE2LPD_DDI_BUF_D2D_LINK_STATE		REG_BIT(28)
-#define  DDI_BUF_TRANS_SELECT(n)	((n) << 24)
-#define  DDI_BUF_EMP_MASK			(0xf << 24)
-#define  DDI_BUF_PHY_LINK_RATE(r)		((r) << 20)
+#define  DDI_BUF_EMP_MASK			REG_GENMASK(27, 24)
+#define  DDI_BUF_TRANS_SELECT(n)		REG_FIELD_PREP(DDI_BUF_EMP_MASK, (n))
+#define  DDI_BUF_PHY_LINK_RATE_MASK		REG_GENMASK(23, 20)
+#define  DDI_BUF_PHY_LINK_RATE(r)		REG_FIELD_PREP(DDI_BUF_PHY_LINK_RATE_MASK, (r))
 #define  DDI_BUF_PORT_DATA_MASK			REG_GENMASK(19, 18)
 #define  DDI_BUF_PORT_DATA_10BIT		REG_FIELD_PREP(DDI_BUF_PORT_DATA_MASK, 0)
 #define  DDI_BUF_PORT_DATA_20BIT		REG_FIELD_PREP(DDI_BUF_PORT_DATA_MASK, 1)
 #define  DDI_BUF_PORT_DATA_40BIT		REG_FIELD_PREP(DDI_BUF_PORT_DATA_MASK, 2)
-#define  DDI_BUF_PORT_REVERSAL			(1 << 16)
+#define  DDI_BUF_PORT_REVERSAL			REG_BIT(16)
 #define  DDI_BUF_LANE_STAGGER_DELAY_MASK	REG_GENMASK(15, 8)
 #define  DDI_BUF_LANE_STAGGER_DELAY(symbols)	REG_FIELD_PREP(DDI_BUF_LANE_STAGGER_DELAY_MASK, \
 							       (symbols))
-#define  DDI_BUF_IS_IDLE			(1 << 7)
+#define  DDI_BUF_IS_IDLE			REG_BIT(7)
 #define  DDI_BUF_CTL_TC_PHY_OWNERSHIP		REG_BIT(6)
-#define  DDI_A_4_LANES				(1 << 4)
-#define  DDI_PORT_WIDTH(width)			(((width) == 3 ? 4 : ((width) - 1)) << 1)
-#define  DDI_PORT_WIDTH_MASK			(7 << 1)
+#define  DDI_A_4_LANES				REG_BIT(4)
+#define  DDI_PORT_WIDTH_MASK			REG_GENMASK(3, 1)
+#define  DDI_PORT_WIDTH(width)			REG_FIELD_PREP(DDI_PORT_WIDTH_MASK, \
+							       ((width) == 3 ? 4 : (width) - 1))
 #define  DDI_PORT_WIDTH_SHIFT			1
-#define  DDI_INIT_DISPLAY_DETECTED		(1 << 0)
+#define  DDI_INIT_DISPLAY_DETECTED		REG_BIT(0)
 
 /* DDI Buffer Translations */
 #define _DDI_BUF_TRANS_A		0x64E00