diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 72220c47e4dc..c4e470676717 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2062,6 +2062,27 @@ enum i915_power_well_id {
 				      _MG_DP_MODE_LN1_ACU_PORT1)
 #define   MG_DP_MODE_CFG_DP_X2_MODE			(1 << 7)
 #define   MG_DP_MODE_CFG_DP_X1_MODE			(1 << 6)
+#define   MG_DP_MODE_CFG_TR2PWR_GATING			(1 << 5)
+#define   MG_DP_MODE_CFG_TRPWR_GATING			(1 << 4)
+#define   MG_DP_MODE_CFG_CLNPWR_GATING			(1 << 3)
+#define   MG_DP_MODE_CFG_DIGPWR_GATING			(1 << 2)
+#define   MG_DP_MODE_CFG_GAONPWR_GATING			(1 << 1)
+
+#define _MG_MISC_SUS0_PORT1				0x168814
+#define _MG_MISC_SUS0_PORT2				0x169814
+#define _MG_MISC_SUS0_PORT3				0x16A814
+#define _MG_MISC_SUS0_PORT4				0x16B814
+#define MG_MISC_SUS0(tc_port) \
+	_MMIO(_PORT(tc_port, _MG_MISC_SUS0_PORT1, _MG_MISC_SUS0_PORT2))
+#define   MG_MISC_SUS0_SUSCLK_DYNCLKGATE_MODE_MASK	(3 << 14)
+#define   MG_MISC_SUS0_SUSCLK_DYNCLKGATE_MODE(x)	((x) << 14)
+#define   MG_MISC_SUS0_CFG_TR2PWR_GATING		(1 << 12)
+#define   MG_MISC_SUS0_CFG_CL2PWR_GATING		(1 << 11)
+#define   MG_MISC_SUS0_CFG_GAONPWR_GATING		(1 << 10)
+#define   MG_MISC_SUS0_CFG_TRPWR_GATING			(1 << 7)
+#define   MG_MISC_SUS0_CFG_CL1PWR_GATING		(1 << 6)
+#define   MG_MISC_SUS0_CFG_DGPWR_GATING			(1 << 5)
+
 
 /* The spec defines this only for BXT PHY0, but lets assume that this
  * would exist for PHY1 too if it had a second channel.
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 0e50d4c3160a..3308f4439e4d 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2680,6 +2680,7 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 	intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);
 
 	icl_program_mg_dp_mode(intel_dp);
+	icl_disable_phy_clock_gating(dig_port);
 
 	if (IS_ICELAKE(dev_priv))
 		icl_ddi_vswing_sequence(encoder, level, encoder->type);
@@ -2697,6 +2698,8 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 	if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
 		intel_dp_stop_link_train(intel_dp);
 
+	icl_enable_phy_clock_gating(dig_port);
+
 	intel_ddi_enable_pipe_clock(crtc_state);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 88074e011333..fc3fc7d7115e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -295,6 +295,72 @@ void icl_program_mg_dp_mode(struct intel_dp *intel_dp)
 	I915_WRITE(MG_DP_MODE(port, 1), ln1);
 }
 
+void icl_enable_phy_clock_gating(struct intel_digital_port *dig_port)
+{
+	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
+	enum port port = dig_port->base.port;
+	enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
+	i915_reg_t mg_regs[2] = { MG_DP_MODE(port, 0), MG_DP_MODE(port, 1) };
+	u32 val;
+	int i;
+
+	if (tc_port == PORT_TC_NONE)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(mg_regs); i++) {
+		val = I915_READ(mg_regs[i]);
+		val |= MG_DP_MODE_CFG_TR2PWR_GATING |
+		       MG_DP_MODE_CFG_TRPWR_GATING |
+		       MG_DP_MODE_CFG_CLNPWR_GATING |
+		       MG_DP_MODE_CFG_DIGPWR_GATING |
+		       MG_DP_MODE_CFG_GAONPWR_GATING;
+		I915_WRITE(mg_regs[i], val);
+	}
+
+	val = I915_READ(MG_MISC_SUS0(tc_port));
+	val |= MG_MISC_SUS0_SUSCLK_DYNCLKGATE_MODE(3) |
+	       MG_MISC_SUS0_CFG_TR2PWR_GATING |
+	       MG_MISC_SUS0_CFG_CL2PWR_GATING |
+	       MG_MISC_SUS0_CFG_GAONPWR_GATING |
+	       MG_MISC_SUS0_CFG_TRPWR_GATING |
+	       MG_MISC_SUS0_CFG_CL1PWR_GATING |
+	       MG_MISC_SUS0_CFG_DGPWR_GATING;
+	I915_WRITE(MG_MISC_SUS0(tc_port), val);
+}
+
+void icl_disable_phy_clock_gating(struct intel_digital_port *dig_port)
+{
+	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
+	enum port port = dig_port->base.port;
+	enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
+	i915_reg_t mg_regs[2] = { MG_DP_MODE(port, 0), MG_DP_MODE(port, 1) };
+	u32 val;
+	int i;
+
+	if (tc_port == PORT_TC_NONE)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(mg_regs); i++) {
+		val = I915_READ(mg_regs[i]);
+		val &= ~(MG_DP_MODE_CFG_TR2PWR_GATING |
+			 MG_DP_MODE_CFG_TRPWR_GATING |
+			 MG_DP_MODE_CFG_CLNPWR_GATING |
+			 MG_DP_MODE_CFG_DIGPWR_GATING |
+			 MG_DP_MODE_CFG_GAONPWR_GATING);
+		I915_WRITE(mg_regs[i], val);
+	}
+
+	val = I915_READ(MG_MISC_SUS0(tc_port));
+	val &= ~(MG_MISC_SUS0_SUSCLK_DYNCLKGATE_MODE_MASK |
+		 MG_MISC_SUS0_CFG_TR2PWR_GATING |
+		 MG_MISC_SUS0_CFG_CL2PWR_GATING |
+		 MG_MISC_SUS0_CFG_GAONPWR_GATING |
+		 MG_MISC_SUS0_CFG_TRPWR_GATING |
+		 MG_MISC_SUS0_CFG_CL1PWR_GATING |
+		 MG_MISC_SUS0_CFG_DGPWR_GATING);
+	I915_WRITE(MG_MISC_SUS0(tc_port), val);
+}
+
 int
 intel_dp_max_data_rate(int max_link_clock, int max_lanes)
 {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 7946d41e78a3..ef709d201dcb 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1699,6 +1699,8 @@ void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
 void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
 			  unsigned int frontbuffer_bits);
 void icl_program_mg_dp_mode(struct intel_dp *intel_dp);
+void icl_enable_phy_clock_gating(struct intel_digital_port *dig_port);
+void icl_disable_phy_clock_gating(struct intel_digital_port *dig_port);
 
 void
 intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
