diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d4ecb1905ad83bd113996b17dd4f2b4316d40806..d9b0249fe5a1a39c1d2b52e35d5db61268f1c873 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8055,6 +8055,7 @@ enum {
 #define GEN7_ROW_CHICKEN2		_MMIO(0xe4f4)
 #define GEN7_ROW_CHICKEN2_GT2		_MMIO(0xf4f4)
 #define   DOP_CLOCK_GATING_DISABLE	(1<<0)
+#define   PUSH_CONSTANT_DEREF_DISABLE	(1<<8)
 
 #define HSW_ROW_CHICKEN3		_MMIO(0xe49c)
 #define  HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE    (1 << 6)
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index d23f1887430943b3ef97f587fde73b6459409f39..d7e1ccf778a2bfd319c46a2b0af742d0bde3514e 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1083,6 +1083,9 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
 	WA_SET_BIT(GEN9_GAMT_ECO_REG_RW_IA,
 		   GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
 
+	/* WaPushConstantDereferenceHoldDisable:cnl */
+	WA_SET_BIT(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
+
 	/* WaEnablePreemptionGranularityControlByUMD:cnl */
 	ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
 	if (ret)