diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index 0355a73ebdcb..3fe22f4418a0 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -349,7 +349,7 @@ bool is_gen12_ccs_cc_plane(const struct drm_framebuffer *fb, int plane)
 	       plane == 2;
 }
 
-bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane)
+static bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane)
 {
 	return intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&
 		color_plane == 1;
diff --git a/drivers/gpu/drm/i915/display/intel_fb.h b/drivers/gpu/drm/i915/display/intel_fb.h
index 97b31c3a2982..c331df575490 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.h
+++ b/drivers/gpu/drm/i915/display/intel_fb.h
@@ -30,7 +30,6 @@ enum intel_plane_caps {
 bool is_ccs_plane(const struct drm_framebuffer *fb, int plane);
 bool is_gen12_ccs_plane(const struct drm_framebuffer *fb, int plane);
 bool is_gen12_ccs_cc_plane(const struct drm_framebuffer *fb, int plane);
-bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane);
 
 u64 *intel_fb_plane_get_modifiers(struct drm_i915_private *i915,
 				  enum intel_plane_caps plane_caps);