diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 2aa06be839742728c2fb94bd9745815df98d7ec2..f85e7174babbf1e18feccae09f0035cec7f3cfa0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1037,8 +1037,6 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
 		    uint32_t acc_flags);
 void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t value);
 uint8_t amdgpu_mm_rreg8(struct amdgpu_device *adev, uint32_t offset);
-uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg);
-void amdgpu_mm_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v);
 
 u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg);
 void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v);
@@ -1066,8 +1064,6 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 #define DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n", amdgpu_mm_rreg(adev, (reg), 0))
 #define WREG32(reg, v) amdgpu_mm_wreg(adev, (reg), (v), 0)
 #define WREG32_IDX(reg, v) amdgpu_mm_wreg(adev, (reg), (v), AMDGPU_REGS_IDX)
-#define RREG64(reg) amdgpu_mm_rreg64(adev, (reg))
-#define WREG64(reg, v) amdgpu_mm_wreg64(adev, (reg), (v))
 #define REG_SET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
 #define REG_GET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
 #define RREG32_PCIE(reg) adev->pcie_rreg(adev, (reg))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 0471a1d4305c3a40cf76a51b4fc0131c0e29a480..682833f90fddfc1fad1d9658ce4e61dad99ae123 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -263,39 +263,6 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
 	}
 }
 
-/**
- * amdgpu_mm_rreg64 - read a 64 bit memory mapped IO register
- *
- * @adev: amdgpu_device pointer
- * @reg: dword aligned register offset
- *
- * Returns the 64 bit value from the offset specified.
- */
-uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg)
-{
-	if ((reg * 4) < adev->rmmio_size)
-		return atomic64_read((atomic64_t *)(adev->rmmio + (reg * 4)));
-	else
-		BUG();
-}
-
-/**
- * amdgpu_mm_wreg64 - write to a 64 bit memory mapped IO register
- *
- * @adev: amdgpu_device pointer
- * @reg: dword aligned register offset
- * @v: 64 bit value to write to the register
- *
- * Writes the value specified to the offset specified.
- */
-void amdgpu_mm_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v)
-{
-	if ((reg * 4) < adev->rmmio_size)
-		atomic64_set((atomic64_t *)(adev->rmmio + (reg * 4)), v);
-	else
-		BUG();
-}
-
 /**
  * amdgpu_io_rreg - read an IO register
  *