diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 595d196f753fa42717b142b5a2ef6543744a7125..5f7aecbba5499d374cdea595c36677df769ad9d9 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -86,8 +86,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define DEVEN 0x54
 #define   DEVEN_MCHBAR_EN (1 << 28)
 
-#define BSM 0x5c
-#define   BSM_MASK (0xFFFF << 20)
+/* BSM in include/drm/i915_drm.h */
 
 #define HPLLCC	0xc0 /* 85x only */
 #define   GC_CLOCK_CONTROL_MASK		(0x7 << 0)