diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d94ab6eb07c531bc7eda9f8fa03c4307a8a59407..95bb420f61e772f996e71decb958ed596e24178d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2316,7 +2316,7 @@ unsigned long intel_gen4_compute_page_offset(int *x, int *y,
 	}
 }
 
-int intel_format_to_fourcc(int format)
+static int intel_format_to_fourcc(int format)
 {
 	switch (format) {
 	case DISPPLANE_8BPP:
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 47a452a5ed17106b5e4e05225a9d5de49c8319a5..7f7407af8c191708350b7baa3b02d90d55aef49f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -991,7 +991,6 @@ enum intel_display_power_domain
 intel_display_port_power_domain(struct intel_encoder *intel_encoder);
 void intel_mode_from_pipe_config(struct drm_display_mode *mode,
 				 struct intel_crtc_state *pipe_config);
-int intel_format_to_fourcc(int format);
 void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc);
 void intel_modeset_preclose(struct drm_device *dev, struct drm_file *file);