diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a9a47f6ef7d16a65631f5f82e0ac79947defc523..58046ffcf031d5b0e0ab3b4847a955605b0f2a6c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4134,4 +4134,12 @@
 #define  PIXCLK_GATE_UNGATE		1<<0
 #define  PIXCLK_GATE_GATE		0<<0
 
+/* SPLL */
+#define SPLL_CTL				0x46020
+#define  SPLL_PLL_ENABLE		(1<<31)
+#define  SPLL_PLL_SCC			(1<<28)
+#define  SPLL_PLL_NON_SCC		(2<<28)
+#define  SPLL_PLL_FREQ_810MHz	(0<<26)
+#define  SPLL_PLL_FREQ_1350MHz	(1<<26)
+
 #endif /* _I915_REG_H_ */