diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index e8a6e53fd551..49114afc9a61 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -1442,9 +1442,9 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
 	vlv_dpio_write(dev_priv, phy, CHV_CMN_DW28, tmp);
 
 	if (id == VLV_DISP_PW_DPIO_CMN_BC) {
-		tmp = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW6_CH1);
+		tmp = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW6_CH1);
 		tmp |= DPIO_DYNPWRDOWNEN_CH1;
-		vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW6_CH1, tmp);
+		vlv_dpio_write(dev_priv, phy, CHV_CMN_DW6_CH1, tmp);
 	} else {
 		/*
 		 * Force the non-existing CL2 off. BXT does this
@@ -1520,9 +1520,9 @@ static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpi
 		return;
 
 	if (ch == DPIO_CH0)
-		reg = _CHV_CMN_DW0_CH0;
+		reg = CHV_CMN_DW0_CH0;
 	else
-		reg = _CHV_CMN_DW6_CH1;
+		reg = CHV_CMN_DW6_CH1;
 
 	vlv_dpio_get(dev_priv);
 	val = vlv_dpio_read(dev_priv, phy, reg);
diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.c b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
index 791902ba729c..89a51b420075 100644
--- a/drivers/gpu/drm/i915/display/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
@@ -883,21 +883,21 @@ void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
 
 	/* program left/right clock distribution */
 	if (pipe != PIPE_B) {
-		val = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW5_CH0);
+		val = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW5_CH0);
 		val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
 		if (ch == DPIO_CH0)
 			val |= CHV_BUFLEFTENA1_FORCE;
 		if (ch == DPIO_CH1)
 			val |= CHV_BUFRIGHTENA1_FORCE;
-		vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW5_CH0, val);
+		vlv_dpio_write(dev_priv, phy, CHV_CMN_DW5_CH0, val);
 	} else {
-		val = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW1_CH1);
+		val = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW1_CH1);
 		val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
 		if (ch == DPIO_CH0)
 			val |= CHV_BUFLEFTENA2_FORCE;
 		if (ch == DPIO_CH1)
 			val |= CHV_BUFRIGHTENA2_FORCE;
-		vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW1_CH1, val);
+		vlv_dpio_write(dev_priv, phy, CHV_CMN_DW1_CH1, val);
 	}
 
 	/* program clock channel usage */
@@ -1036,13 +1036,13 @@ void chv_phy_post_pll_disable(struct intel_encoder *encoder,
 
 	/* disable left/right clock distribution */
 	if (pipe != PIPE_B) {
-		val = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW5_CH0);
+		val = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW5_CH0);
 		val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
-		vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW5_CH0, val);
+		vlv_dpio_write(dev_priv, phy, CHV_CMN_DW5_CH0, val);
 	} else {
-		val = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW1_CH1);
+		val = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW1_CH1);
 		val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
-		vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW1_CH1, val);
+		vlv_dpio_write(dev_priv, phy, CHV_CMN_DW1_CH1, val);
 	}
 
 	vlv_dpio_put(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7891170c260c..adbe124d10bd 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -459,13 +459,13 @@
 #define  DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE	1 /* 1: coarse & 0 : fine  */
 #define CHV_PLL_DW9(ch) _PIPE(ch, _CHV_PLL_DW9_CH0, _CHV_PLL_DW9_CH1)
 
-#define _CHV_CMN_DW0_CH0               0x8100
+#define CHV_CMN_DW0_CH0			0x8100
 #define   DPIO_ALLDL_POWERDOWN_SHIFT_CH0	19
 #define   DPIO_ANYDL_POWERDOWN_SHIFT_CH0	18
 #define   DPIO_ALLDL_POWERDOWN			(1 << 1)
 #define   DPIO_ANYDL_POWERDOWN			(1 << 0)
 
-#define _CHV_CMN_DW5_CH0               0x8114
+#define CHV_CMN_DW5_CH0			0x8114
 #define   CHV_BUFRIGHTENA1_DISABLE	(0 << 20)
 #define   CHV_BUFRIGHTENA1_NORMAL	(1 << 20)
 #define   CHV_BUFRIGHTENA1_FORCE	(3 << 20)
@@ -475,18 +475,18 @@
 #define   CHV_BUFLEFTENA1_FORCE		(3 << 22)
 #define   CHV_BUFLEFTENA1_MASK		(3 << 22)
 
-#define _CHV_CMN_DW13_CH0		0x8134
-#define _CHV_CMN_DW0_CH1		0x8080
+#define CHV_CMN_DW13_CH0		0x8134
+#define CHV_CMN_DW0_CH1			0x8080
 #define   DPIO_CHV_S1_DIV_SHIFT		21
 #define   DPIO_CHV_P1_DIV_SHIFT		13 /* 3 bits */
 #define   DPIO_CHV_P2_DIV_SHIFT		8  /* 5 bits */
 #define   DPIO_CHV_K_DIV_SHIFT		4
 #define   DPIO_PLL_FREQLOCK		(1 << 1)
 #define   DPIO_PLL_LOCK			(1 << 0)
-#define CHV_CMN_DW13(ch) _PIPE(ch, _CHV_CMN_DW13_CH0, _CHV_CMN_DW0_CH1)
+#define CHV_CMN_DW13(ch) _PIPE(ch, CHV_CMN_DW13_CH0, CHV_CMN_DW0_CH1)
 
-#define _CHV_CMN_DW14_CH0		0x8138
-#define _CHV_CMN_DW1_CH1		0x8084
+#define CHV_CMN_DW14_CH0		0x8138
+#define CHV_CMN_DW1_CH1			0x8084
 #define   DPIO_AFC_RECAL		(1 << 14)
 #define   DPIO_DCLKP_EN			(1 << 13)
 #define   CHV_BUFLEFTENA2_DISABLE	(0 << 17) /* CL2 DW1 only */
@@ -497,16 +497,15 @@
 #define   CHV_BUFRIGHTENA2_NORMAL	(1 << 19) /* CL2 DW1 only */
 #define   CHV_BUFRIGHTENA2_FORCE	(3 << 19) /* CL2 DW1 only */
 #define   CHV_BUFRIGHTENA2_MASK		(3 << 19) /* CL2 DW1 only */
-#define CHV_CMN_DW14(ch) _PIPE(ch, _CHV_CMN_DW14_CH0, _CHV_CMN_DW1_CH1)
+#define CHV_CMN_DW14(ch) _PIPE(ch, CHV_CMN_DW14_CH0, CHV_CMN_DW1_CH1)
 
-#define _CHV_CMN_DW19_CH0		0x814c
-#define _CHV_CMN_DW6_CH1		0x8098
+#define CHV_CMN_DW19_CH0		0x814c
+#define CHV_CMN_DW6_CH1		0x8098
 #define   DPIO_ALLDL_POWERDOWN_SHIFT_CH1	30 /* CL2 DW6 only */
 #define   DPIO_ANYDL_POWERDOWN_SHIFT_CH1	29 /* CL2 DW6 only */
 #define   DPIO_DYNPWRDOWNEN_CH1		(1 << 28) /* CL2 DW6 only */
 #define   CHV_CMN_USEDCLKCHANNEL	(1 << 13)
-
-#define CHV_CMN_DW19(ch) _PIPE(ch, _CHV_CMN_DW19_CH0, _CHV_CMN_DW6_CH1)
+#define CHV_CMN_DW19(ch) _PIPE(ch, CHV_CMN_DW19_CH0, CHV_CMN_DW6_CH1)
 
 #define CHV_CMN_DW28			0x8170
 #define   DPIO_CL1POWERDOWNEN		(1 << 23)