diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 856bfe8d1f42..bd126ff3a6e2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3479,8 +3479,6 @@ u32 vlv_ccu_read(struct drm_i915_private *dev_priv, u32 reg);
 void vlv_ccu_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
 u32 vlv_bunit_read(struct drm_i915_private *dev_priv, u32 reg);
 void vlv_bunit_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
-u32 vlv_gps_core_read(struct drm_i915_private *dev_priv, u32 reg);
-void vlv_gps_core_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
 u32 vlv_dpio_read(struct drm_i915_private *dev_priv, enum pipe pipe, int reg);
 void vlv_dpio_write(struct drm_i915_private *dev_priv, enum pipe pipe, int reg, u32 val);
 u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 85d56ad29516..6867295dbdc1 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -618,7 +618,6 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define   IOSF_PORT_CCK				0x14
 #define   IOSF_PORT_DPIO_2			0x1a
 #define   IOSF_PORT_FLISDSI			0x1b
-#define   IOSF_PORT_GPS_CORE			0x48
 #define   IOSF_PORT_CCU				0xa9
 #define VLV_IOSF_DATA				_MMIO(VLV_DISPLAY_BASE + 0x2104)
 #define VLV_IOSF_ADDR				_MMIO(VLV_DISPLAY_BASE + 0x2108)
diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
index 8831fc579ade..f5b0ab6f5942 100644
--- a/drivers/gpu/drm/i915/intel_sideband.c
+++ b/drivers/gpu/drm/i915/intel_sideband.c
@@ -171,20 +171,6 @@ void vlv_ccu_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
 			SB_CRWRDA_NP, reg, &val);
 }
 
-u32 vlv_gps_core_read(struct drm_i915_private *dev_priv, u32 reg)
-{
-	u32 val = 0;
-	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPS_CORE,
-			SB_CRRDDA_NP, reg, &val);
-	return val;
-}
-
-void vlv_gps_core_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
-{
-	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPS_CORE,
-			SB_CRWRDA_NP, reg, &val);
-}
-
 u32 vlv_dpio_read(struct drm_i915_private *dev_priv, enum pipe pipe, int reg)
 {
 	u32 val = 0;