diff --git a/drivers/gpu/drm/i915/display/intel_display_regs.h b/drivers/gpu/drm/i915/display/intel_display_regs.h
index 39e50423132f..0f5018482497 100644
--- a/drivers/gpu/drm/i915/display/intel_display_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_display_regs.h
@@ -1747,6 +1747,9 @@
 #define XELPD_CHICKEN_DCPR_3			_MMIO(0x46438)
 #define   DMD_RSP_TIMEOUT_DISABLE		REG_BIT(19)
 
+#define XE3P_CHICKEN_DCPR_4			_MMIO(0x454a0)
+#define   DCPR4_BLOCK_DC3CO_ACTIVE_FRAME	REG_BIT(24)
+
 #define SKL_DFSM			_MMIO(0x51000)
 #define   SKL_DFSM_DISPLAY_PM_DISABLE	(1 << 27)
 #define   SKL_DFSM_DISPLAY_HDCP_DISABLE	(1 << 25)
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.c b/drivers/gpu/drm/i915/display/intel_display_wa.c
index 2094eda09c91..b4c49816f7eb 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.c
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.c
@@ -112,6 +112,8 @@ bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa,
 			DISPLAY_VERx100(display) == 1401;
 	case INTEL_DISPLAY_WA_14025769978:
 		return DISPLAY_VER(display) == 35;
+	case INTEL_DISPLAY_WA_14026643300:
+		return DISPLAY_VER(display) == 35;
 	case INTEL_DISPLAY_WA_15013987218:
 		return DISPLAY_VER(display) == 20;
 	case INTEL_DISPLAY_WA_15018326506:
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h b/drivers/gpu/drm/i915/display/intel_display_wa.h
index 9cdd148ea4fa..92b3980bea84 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.h
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
@@ -43,6 +43,7 @@ enum intel_display_wa {
 	INTEL_DISPLAY_WA_14016740474,
 	INTEL_DISPLAY_WA_14020863754,
 	INTEL_DISPLAY_WA_14025769978,
+	INTEL_DISPLAY_WA_14026643300,
 	INTEL_DISPLAY_WA_15013987218,
 	INTEL_DISPLAY_WA_15018326506,
 	INTEL_DISPLAY_WA_16011181250,
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 92af21d823a3..40e3d7095996 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -2100,6 +2100,18 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 		else if (display->platform.alderlake_p)
 			intel_de_rmw(display, CLKGATE_DIS_MISC, 0,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS);
+
+		/*
+		 * Wa_14026643300
+		 * On Xe3P, restrict DC3CO entry during active frame when PSR2 is
+		 * enabled without panel Early Transport; required to avoid pipe bad state.
+		 * DMC honours CHICKEN_DCPR_4 bit 24 to block DC3CO entry during active frame.
+		 */
+		if (intel_display_wa(display, INTEL_DISPLAY_WA_14026643300) &&
+		    !intel_dp->psr.panel_replay_enabled &&
+		    !intel_dp->psr.su_region_et_enabled)
+			intel_de_rmw(display, XE3P_CHICKEN_DCPR_4,
+				     0, DCPR4_BLOCK_DC3CO_ACTIVE_FRAME);
 	}
 
 	/* Wa_16025596647 */
@@ -2341,6 +2353,10 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
 		else if (display->platform.alderlake_p)
 			intel_de_rmw(display, CLKGATE_DIS_MISC,
 				     CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
+
+		if (intel_display_wa(display, INTEL_DISPLAY_WA_14026643300))
+			intel_de_rmw(display, XE3P_CHICKEN_DCPR_4,
+				     DCPR4_BLOCK_DC3CO_ACTIVE_FRAME, 0);
 	}
 
 	if (intel_dp_is_edp(intel_dp))