diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c
index 1d748b9dca44..ef61870b8829 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -483,7 +483,8 @@ static void mtl_pipedmc_clock_gating_wa(struct intel_display *display)
 	 * for pipe A and B.
 	 */
 	intel_de_rmw(display, GEN9_CLKGATE_DIS_0, 0,
-		     MTL_PIPEDMC_GATING_DIS_A | MTL_PIPEDMC_GATING_DIS_B);
+		     MTL_PIPEDMC_GATING_DIS(PIPE_A) |
+		     MTL_PIPEDMC_GATING_DIS(PIPE_B));
 }
 
 static void pipedmc_clock_gating_wa(struct intel_display *display, bool enable)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 52a902532e6f..04fb40867cc0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -763,8 +763,7 @@
  */
 #define GEN9_CLKGATE_DIS_0		_MMIO(0x46530)
 #define   DARBF_GATING_DIS		REG_BIT(27)
-#define   MTL_PIPEDMC_GATING_DIS_A	REG_BIT(15)
-#define   MTL_PIPEDMC_GATING_DIS_B	REG_BIT(14)
+#define   MTL_PIPEDMC_GATING_DIS(pipe)	REG_BIT(15 - (pipe))
 #define   PWM2_GATING_DIS		REG_BIT(14)
 #define   PWM1_GATING_DIS		REG_BIT(13)