diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
index 79873bf64e8d..d57fd855086a 100644
--- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
@@ -24,6 +24,10 @@
 #define RING_PSMI_CTL(base)			XE_REG((base) + 0x50, XE_REG_OPTION_MASKED)
 #define   RC_SEMA_IDLE_MSG_DISABLE		REG_BIT(12)
 #define   WAIT_FOR_EVENT_POWER_DOWN_DISABLE	REG_BIT(7)
+#define   IDLE_MSG_DISABLE			REG_BIT(0)
+
+#define RING_PWRCTX_MAXCNT(base)		XE_REG((base) + 0x54)
+#define   IDLE_WAIT_TIME			REG_GENMASK(19, 0)
 
 #define RING_ACTHD_UDW(base)			XE_REG((base) + 0x5c)
 #define RING_DMA_FADD_UDW(base)			XE_REG((base) + 0x60)
diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
index 81281e9c02eb..24b5226f1433 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -339,6 +339,22 @@ hw_engine_setup_default_state(struct xe_hw_engine *hwe)
 					   ring_cmd_cctl_val,
 					   XE_RTP_ACTION_FLAG(ENGINE_BASE)))
 		},
+		/*
+		 * To allow the GSC engine to go idle on MTL we need to enable
+		 * idle messaging and set the hysteresis value (we use 0xA=5us
+		 * as recommended in spec). On platforms after MTL this is
+		 * enabled by default.
+		 */
+		{ XE_RTP_NAME("MTL GSCCS IDLE MSG enable"),
+		  XE_RTP_RULES(MEDIA_VERSION(1300), ENGINE_CLASS(OTHER)),
+		  XE_RTP_ACTIONS(CLR(RING_PSMI_CTL(0),
+				     IDLE_MSG_DISABLE,
+				     XE_RTP_ACTION_FLAG(ENGINE_BASE)),
+				 FIELD_SET(RING_PWRCTX_MAXCNT(0),
+					   IDLE_WAIT_TIME,
+					   0xA,
+					   XE_RTP_ACTION_FLAG(ENGINE_BASE)))
+		},
 		{}
 	};