diff --git a/drivers/gpu/drm/radeon/evergreen_reg.h b/drivers/gpu/drm/radeon/evergreen_reg.h
index 76630c6bb0fb..8a4e641f0e3c 100644
--- a/drivers/gpu/drm/radeon/evergreen_reg.h
+++ b/drivers/gpu/drm/radeon/evergreen_reg.h
@@ -29,6 +29,11 @@
 #define TN_SMC_IND_DATA_0                               0x204
 
 /* evergreen */
+#define EVERGREEN_PIF_PHY0_INDEX                        0x8
+#define EVERGREEN_PIF_PHY0_DATA                         0xc
+#define EVERGREEN_PIF_PHY1_INDEX                        0x10
+#define EVERGREEN_PIF_PHY1_DATA                         0x14
+
 #define EVERGREEN_VGA_MEMORY_BASE_ADDRESS               0x310
 #define EVERGREEN_VGA_MEMORY_BASE_ADDRESS_HIGH          0x324
 #define EVERGREEN_D3VGA_CONTROL                         0x3e0
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index c43b54bb93a7..be79a4d8bd27 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2087,6 +2087,10 @@ void cik_mm_wdoorbell(struct radeon_device *rdev, u32 offset, u32 v);
 #define WREG32_RCU(reg, v) r600_rcu_wreg(rdev, (reg), (v))
 #define RREG32_CG(reg) eg_cg_rreg(rdev, (reg))
 #define WREG32_CG(reg, v) eg_cg_wreg(rdev, (reg), (v))
+#define RREG32_PIF_PHY0(reg) eg_pif_phy0_rreg(rdev, (reg))
+#define WREG32_PIF_PHY0(reg, v) eg_pif_phy0_wreg(rdev, (reg), (v))
+#define RREG32_PIF_PHY1(reg) eg_pif_phy1_rreg(rdev, (reg))
+#define WREG32_PIF_PHY1(reg, v) eg_pif_phy1_wreg(rdev, (reg), (v))
 #define WREG32_P(reg, val, mask)				\
 	do {							\
 		uint32_t tmp_ = RREG32(reg);			\
@@ -2173,6 +2177,36 @@ static inline void eg_cg_wreg(struct radeon_device *rdev, u32 reg, u32 v)
 	WREG32(EVERGREEN_CG_IND_DATA, (v));
 }
 
+static inline u32 eg_pif_phy0_rreg(struct radeon_device *rdev, u32 reg)
+{
+	u32 r;
+
+	WREG32(EVERGREEN_PIF_PHY0_INDEX, ((reg) & 0xffff));
+	r = RREG32(EVERGREEN_PIF_PHY0_DATA);
+	return r;
+}
+
+static inline void eg_pif_phy0_wreg(struct radeon_device *rdev, u32 reg, u32 v)
+{
+	WREG32(EVERGREEN_PIF_PHY0_INDEX, ((reg) & 0xffff));
+	WREG32(EVERGREEN_PIF_PHY0_DATA, (v));
+}
+
+static inline u32 eg_pif_phy1_rreg(struct radeon_device *rdev, u32 reg)
+{
+	u32 r;
+
+	WREG32(EVERGREEN_PIF_PHY1_INDEX, ((reg) & 0xffff));
+	r = RREG32(EVERGREEN_PIF_PHY1_DATA);
+	return r;
+}
+
+static inline void eg_pif_phy1_wreg(struct radeon_device *rdev, u32 reg, u32 v)
+{
+	WREG32(EVERGREEN_PIF_PHY1_INDEX, ((reg) & 0xffff));
+	WREG32(EVERGREEN_PIF_PHY1_DATA, (v));
+}
+
 void r100_pll_errata_after_index(struct radeon_device *rdev);