diff --git a/drivers/gpu/drm/i915/display/intel_pmdemand.c b/drivers/gpu/drm/i915/display/intel_pmdemand.c
index ceaf9e3147da..746b547dddd0 100644
--- a/drivers/gpu/drm/i915/display/intel_pmdemand.c
+++ b/drivers/gpu/drm/i915/display/intel_pmdemand.c
@@ -258,6 +258,7 @@ intel_pmdemand_connector_needs_update(struct intel_atomic_state *state)
 
 static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 {
+	struct intel_display *display = to_intel_display(state);
 	const struct intel_bw_state *new_bw_state, *old_bw_state;
 	const struct intel_cdclk_state *new_cdclk_state, *old_cdclk_state;
 	const struct intel_crtc_state *new_crtc_state, *old_crtc_state;
@@ -274,12 +275,16 @@ static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 	new_dbuf_state = intel_atomic_get_new_dbuf_state(state);
 	old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
 	if (new_dbuf_state &&
-	    (new_dbuf_state->active_pipes !=
-	     old_dbuf_state->active_pipes ||
-	     new_dbuf_state->enabled_slices !=
-	     old_dbuf_state->enabled_slices))
+	    new_dbuf_state->active_pipes != old_dbuf_state->active_pipes)
 		return true;
 
+	if (DISPLAY_VER(display) < 30) {
+		if (new_dbuf_state &&
+		    new_dbuf_state->enabled_slices !=
+		    old_dbuf_state->enabled_slices)
+			return true;
+	}
+
 	new_cdclk_state = intel_atomic_get_new_cdclk_state(state);
 	old_cdclk_state = intel_atomic_get_old_cdclk_state(state);
 	if (new_cdclk_state &&
@@ -327,10 +332,15 @@ int intel_pmdemand_atomic_check(struct intel_atomic_state *state)
 	if (IS_ERR(new_dbuf_state))
 		return PTR_ERR(new_dbuf_state);
 
-	new_pmdemand_state->params.active_pipes =
-		min_t(u8, hweight8(new_dbuf_state->active_pipes), 3);
-	new_pmdemand_state->params.active_dbufs =
-		min_t(u8, hweight8(new_dbuf_state->enabled_slices), 3);
+	if (DISPLAY_VER(i915) >= 30) {
+		new_pmdemand_state->params.active_dbufs =
+			min_t(u8, hweight8(new_dbuf_state->enabled_slices), 3);
+		new_pmdemand_state->params.active_pipes =
+			min_t(u8, hweight8(new_dbuf_state->active_pipes), INTEL_NUM_PIPES(i915));
+	}
+	else
+		new_pmdemand_state->params.active_pipes =
+			min_t(u8, hweight8(new_dbuf_state->active_pipes), 3);
 
 	new_cdclk_state = intel_atomic_get_cdclk_state(state);
 	if (IS_ERR(new_cdclk_state))
@@ -395,27 +405,32 @@ intel_pmdemand_init_pmdemand_params(struct drm_i915_private *i915,
 
 	reg2 = intel_de_read(i915, XELPDP_INITIATE_PMDEMAND_REQUEST(1));
 
-	/* Set 1*/
 	pmdemand_state->params.qclk_gv_bw =
 		REG_FIELD_GET(XELPDP_PMDEMAND_QCLK_GV_BW_MASK, reg1);
 	pmdemand_state->params.voltage_index =
 		REG_FIELD_GET(XELPDP_PMDEMAND_VOLTAGE_INDEX_MASK, reg1);
 	pmdemand_state->params.qclk_gv_index =
 		REG_FIELD_GET(XELPDP_PMDEMAND_QCLK_GV_INDEX_MASK, reg1);
-	pmdemand_state->params.active_pipes =
-		REG_FIELD_GET(XELPDP_PMDEMAND_PIPES_MASK, reg1);
-	pmdemand_state->params.active_dbufs =
-		REG_FIELD_GET(XELPDP_PMDEMAND_DBUFS_MASK, reg1);
 	pmdemand_state->params.active_phys =
 		REG_FIELD_GET(XELPDP_PMDEMAND_PHYS_MASK, reg1);
 
-	/* Set 2*/
 	pmdemand_state->params.cdclk_freq_mhz =
 		REG_FIELD_GET(XELPDP_PMDEMAND_CDCLK_FREQ_MASK, reg2);
 	pmdemand_state->params.ddiclk_max =
 		REG_FIELD_GET(XELPDP_PMDEMAND_DDICLK_FREQ_MASK, reg2);
-	pmdemand_state->params.scalers =
-		REG_FIELD_GET(XELPDP_PMDEMAND_SCALERS_MASK, reg2);
+
+	if (DISPLAY_VER(i915) >= 30) {
+		pmdemand_state->params.active_pipes =
+			REG_FIELD_GET(XE3_PMDEMAND_PIPES_MASK, reg1);
+	} else {
+		pmdemand_state->params.active_pipes =
+			REG_FIELD_GET(XELPDP_PMDEMAND_PIPES_MASK, reg1);
+		pmdemand_state->params.active_dbufs =
+			REG_FIELD_GET(XELPDP_PMDEMAND_DBUFS_MASK, reg1);
+
+		pmdemand_state->params.scalers =
+			REG_FIELD_GET(XELPDP_PMDEMAND_SCALERS_MASK, reg2);
+	}
 
 unlock:
 	mutex_unlock(&i915->display.pmdemand.lock);
@@ -442,6 +457,10 @@ void intel_pmdemand_program_dbuf(struct drm_i915_private *i915,
 {
 	u32 dbufs = min_t(u32, hweight8(dbuf_slices), 3);
 
+	/* PM Demand only tracks active dbufs on pre-Xe3 platforms */
+	if (DISPLAY_VER(i915) >= 30)
+		return;
+
 	mutex_lock(&i915->display.pmdemand.lock);
 	if (drm_WARN_ON(&i915->drm,
 			!intel_pmdemand_check_prev_transaction(i915)))
@@ -460,7 +479,8 @@ void intel_pmdemand_program_dbuf(struct drm_i915_private *i915,
 }
 
 static void
-intel_pmdemand_update_params(const struct intel_pmdemand_state *new,
+intel_pmdemand_update_params(struct drm_i915_private *i915,
+			     const struct intel_pmdemand_state *new,
 			     const struct intel_pmdemand_state *old,
 			     u32 *reg1, u32 *reg2, bool serialized)
 {
@@ -495,16 +515,22 @@ intel_pmdemand_update_params(const struct intel_pmdemand_state *new,
 	update_reg(reg1, qclk_gv_bw, XELPDP_PMDEMAND_QCLK_GV_BW_MASK);
 	update_reg(reg1, voltage_index, XELPDP_PMDEMAND_VOLTAGE_INDEX_MASK);
 	update_reg(reg1, qclk_gv_index, XELPDP_PMDEMAND_QCLK_GV_INDEX_MASK);
-	update_reg(reg1, active_pipes, XELPDP_PMDEMAND_PIPES_MASK);
-	update_reg(reg1, active_dbufs, XELPDP_PMDEMAND_DBUFS_MASK);
 	update_reg(reg1, active_phys, XELPDP_PMDEMAND_PHYS_MASK);
 
 	/* Set 2*/
 	update_reg(reg2, cdclk_freq_mhz, XELPDP_PMDEMAND_CDCLK_FREQ_MASK);
 	update_reg(reg2, ddiclk_max, XELPDP_PMDEMAND_DDICLK_FREQ_MASK);
-	update_reg(reg2, scalers, XELPDP_PMDEMAND_SCALERS_MASK);
 	update_reg(reg2, plls, XELPDP_PMDEMAND_PLLS_MASK);
 
+	if (DISPLAY_VER(i915) >= 30) {
+		update_reg(reg1, active_pipes, XE3_PMDEMAND_PIPES_MASK);
+	} else {
+		update_reg(reg1, active_pipes, XELPDP_PMDEMAND_PIPES_MASK);
+		update_reg(reg1, active_dbufs, XELPDP_PMDEMAND_DBUFS_MASK);
+
+		update_reg(reg2, scalers, XELPDP_PMDEMAND_SCALERS_MASK);
+	}
+
 #undef update_reg
 }
 
@@ -529,7 +555,7 @@ intel_pmdemand_program_params(struct drm_i915_private *i915,
 	reg2 = intel_de_read(i915, XELPDP_INITIATE_PMDEMAND_REQUEST(1));
 	mod_reg2 = reg2;
 
-	intel_pmdemand_update_params(new, old, &mod_reg1, &mod_reg2,
+	intel_pmdemand_update_params(i915, new, old, &mod_reg1, &mod_reg2,
 				     serialized);
 
 	if (reg1 != mod_reg1) {
diff --git a/drivers/gpu/drm/i915/display/intel_pmdemand.h b/drivers/gpu/drm/i915/display/intel_pmdemand.h
index 128fd61f8f14..a1c49efdc493 100644
--- a/drivers/gpu/drm/i915/display/intel_pmdemand.h
+++ b/drivers/gpu/drm/i915/display/intel_pmdemand.h
@@ -20,14 +20,14 @@ struct pmdemand_params {
 	u8 voltage_index;
 	u8 qclk_gv_index;
 	u8 active_pipes;
-	u8 active_dbufs;
+	u8 active_dbufs;	/* pre-Xe3 only */
 	/* Total number of non type C active phys from active_phys_mask */
 	u8 active_phys;
 	u8 plls;
 	u16 cdclk_freq_mhz;
 	/* max from ddi_clocks[] */
 	u16 ddiclk_max;
-	u8 scalers;
+	u8 scalers;		/* pre-Xe3 only */
 };
 
 struct intel_pmdemand_state {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 405f409e9761..89e4381f8baa 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2696,6 +2696,7 @@
 #define  XELPDP_PMDEMAND_QCLK_GV_BW_MASK		REG_GENMASK(31, 16)
 #define  XELPDP_PMDEMAND_VOLTAGE_INDEX_MASK		REG_GENMASK(14, 12)
 #define  XELPDP_PMDEMAND_QCLK_GV_INDEX_MASK		REG_GENMASK(11, 8)
+#define  XE3_PMDEMAND_PIPES_MASK			REG_GENMASK(7, 4)
 #define  XELPDP_PMDEMAND_PIPES_MASK			REG_GENMASK(7, 6)
 #define  XELPDP_PMDEMAND_DBUFS_MASK			REG_GENMASK(5, 4)
 #define  XELPDP_PMDEMAND_PHYS_MASK			REG_GENMASK(2, 0)
