diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4977bede07114..ca549d77657bb 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -11447,6 +11447,9 @@ enum skl_power_gate {
 #define  BIG_JOINER_ENABLE			(1 << 29)
 #define  MASTER_BIG_JOINER_ENABLE		(1 << 28)
 #define  VGA_CENTERING_ENABLE			(1 << 27)
+#define  SPLITTER_CONFIGURATION_MASK		REG_GENMASK(26, 25)
+#define  SPLITTER_CONFIGURATION_2_SEGMENT	REG_FIELD_PREP(SPLITTER_CONFIGURATION_MASK, 0)
+#define  SPLITTER_CONFIGURATION_4_SEGMENT	REG_FIELD_PREP(SPLITTER_CONFIGURATION_MASK, 1)
 
 #define _ICL_PIPE_DSS_CTL2_PB			0x78204
 #define _ICL_PIPE_DSS_CTL2_PC			0x78404