drm/amdgpu: Write masked value to control register

On the dce_v6_0 and dce_v8_0 hpd tear down callback, the tmp variable
should be written into the control register instead of 0.
Reviewed-by: André Almeida <andrealmeid@igalia.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

@@ -339,7 +339,7 @@ static void dce_v6_0_hpd_fini(struct amdgpu_device *adev)
 
 		tmp = RREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd]);
 		tmp &= ~DC_HPD1_CONTROL__DC_HPD1_EN_MASK;
-		WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], 0);
+		WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], tmp);
 
 		amdgpu_irq_put(adev, &adev->hpd_irq, amdgpu_connector->hpd.hpd);
 	}

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

@@ -333,7 +333,7 @@ static void dce_v8_0_hpd_fini(struct amdgpu_device *adev)
 
 		tmp = RREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd]);
 		tmp &= ~DC_HPD1_CONTROL__DC_HPD1_EN_MASK;
-		WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], 0);
+		WREG32(mmDC_HPD1_CONTROL + hpd_offsets[amdgpu_connector->hpd.hpd], tmp);
 
 		amdgpu_irq_put(adev, &adev->hpd_irq, amdgpu_connector->hpd.hpd);
 	}