diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 446bebf3236c..60dfad33f9ee 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7631,11 +7631,13 @@ enum {
 #define _CHICKEN_TRANS_B	0x420c4
 #define _CHICKEN_TRANS_C	0x420c8
 #define _CHICKEN_TRANS_EDP	0x420cc
+#define _CHICKEN_TRANS_D	0x420d8
 #define CHICKEN_TRANS(trans)	_MMIO(_PICK((trans), \
 					    [TRANSCODER_EDP] = _CHICKEN_TRANS_EDP, \
 					    [TRANSCODER_A] = _CHICKEN_TRANS_A, \
 					    [TRANSCODER_B] = _CHICKEN_TRANS_B, \
-					    [TRANSCODER_C] = _CHICKEN_TRANS_C))
+					    [TRANSCODER_C] = _CHICKEN_TRANS_C, \
+					    [TRANSCODER_D] = _CHICKEN_TRANS_D))
 #define  VSC_DATA_SEL_SOFTWARE_CONTROL	(1 << 25) /* GLK and CNL+ */
 #define  DDI_TRAINING_OVERRIDE_ENABLE	(1 << 19)
 #define  DDI_TRAINING_OVERRIDE_VALUE	(1 << 18)