Merge tag 'drm-intel-fixes-2022-11-03' of...

Merge tag 'drm-intel-fixes-2022-11-03' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Add locking around DKL PHY register accesses (Imre Deak)
- Stop abusing swiotlb_max_segment (Robert Beckett)
- Filter out invalid outputs more sensibly (Ville Syrjälä)
- Setup DDC fully before output init (Ville Syrjälä)
- Simplify intel_panel_add_edid_alt_fixed_modes() (Ville Syrjälä)
- Grab mode_config.mutex during LVDS init to avoid WARNs (Ville Syrjälä)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y2ODlCGM4nACmzsJ@tursulin-desk

drivers/gpu/drm/i915/Makefile

@@ -282,6 +282,7 @@ i915-y += \
 	display/intel_ddi.o \
 	display/intel_ddi_buf_trans.o \
 	display/intel_display_trace.o \
+	display/intel_dkl_phy.o \
 	display/intel_dp.o \
 	display/intel_dp_aux.o \
 	display/intel_dp_aux_backlight.o \

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -43,6 +43,7 @@
 #include "intel_de.h"
 #include "intel_display_power.h"
 #include "intel_display_types.h"
+#include "intel_dkl_phy.h"
 #include "intel_dp.h"
 #include "intel_dp_link_training.h"
 #include "intel_dp_mst.h"
@@ -1262,33 +1263,30 @@ static void tgl_dkl_phy_set_signal_levels(struct intel_encoder *encoder,
 	for (ln = 0; ln < 2; ln++) {
 		int level;
 
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, ln));
-
-		intel_de_write(dev_priv, DKL_TX_PMD_LANE_SUS(tc_port), 0);
+		intel_dkl_phy_write(dev_priv, DKL_TX_PMD_LANE_SUS(tc_port), ln, 0);
 
 		level = intel_ddi_level(encoder, crtc_state, 2*ln+0);
 
-		intel_de_rmw(dev_priv, DKL_TX_DPCNTL0(tc_port),
-			     DKL_TX_PRESHOOT_COEFF_MASK |
-			     DKL_TX_DE_EMPAHSIS_COEFF_MASK |
-			     DKL_TX_VSWING_CONTROL_MASK,
-			     DKL_TX_PRESHOOT_COEFF(trans->entries[level].dkl.preshoot) |
-			     DKL_TX_DE_EMPHASIS_COEFF(trans->entries[level].dkl.de_emphasis) |
-			     DKL_TX_VSWING_CONTROL(trans->entries[level].dkl.vswing));
+		intel_dkl_phy_rmw(dev_priv, DKL_TX_DPCNTL0(tc_port), ln,
+				  DKL_TX_PRESHOOT_COEFF_MASK |
+				  DKL_TX_DE_EMPAHSIS_COEFF_MASK |
+				  DKL_TX_VSWING_CONTROL_MASK,
+				  DKL_TX_PRESHOOT_COEFF(trans->entries[level].dkl.preshoot) |
+				  DKL_TX_DE_EMPHASIS_COEFF(trans->entries[level].dkl.de_emphasis) |
+				  DKL_TX_VSWING_CONTROL(trans->entries[level].dkl.vswing));
 
 		level = intel_ddi_level(encoder, crtc_state, 2*ln+1);
 
-		intel_de_rmw(dev_priv, DKL_TX_DPCNTL1(tc_port),
-			     DKL_TX_PRESHOOT_COEFF_MASK |
-			     DKL_TX_DE_EMPAHSIS_COEFF_MASK |
-			     DKL_TX_VSWING_CONTROL_MASK,
-			     DKL_TX_PRESHOOT_COEFF(trans->entries[level].dkl.preshoot) |
-			     DKL_TX_DE_EMPHASIS_COEFF(trans->entries[level].dkl.de_emphasis) |
-			     DKL_TX_VSWING_CONTROL(trans->entries[level].dkl.vswing));
+		intel_dkl_phy_rmw(dev_priv, DKL_TX_DPCNTL1(tc_port), ln,
+				  DKL_TX_PRESHOOT_COEFF_MASK |
+				  DKL_TX_DE_EMPAHSIS_COEFF_MASK |
+				  DKL_TX_VSWING_CONTROL_MASK,
+				  DKL_TX_PRESHOOT_COEFF(trans->entries[level].dkl.preshoot) |
+				  DKL_TX_DE_EMPHASIS_COEFF(trans->entries[level].dkl.de_emphasis) |
+				  DKL_TX_VSWING_CONTROL(trans->entries[level].dkl.vswing));
 
-		intel_de_rmw(dev_priv, DKL_TX_DPCNTL2(tc_port),
-			     DKL_TX_DP20BITMODE, 0);
+		intel_dkl_phy_rmw(dev_priv, DKL_TX_DPCNTL2(tc_port), ln,
+				  DKL_TX_DP20BITMODE, 0);
 
 		if (IS_ALDERLAKE_P(dev_priv)) {
 			u32 val;
@@ -1306,10 +1304,10 @@ static void tgl_dkl_phy_set_signal_levels(struct intel_encoder *encoder,
 				val |= DKL_TX_DPCNTL2_CFG_LOADGENSELECT_TX2(0);
 			}
 
-			intel_de_rmw(dev_priv, DKL_TX_DPCNTL2(tc_port),
-				     DKL_TX_DPCNTL2_CFG_LOADGENSELECT_TX1_MASK |
-				     DKL_TX_DPCNTL2_CFG_LOADGENSELECT_TX2_MASK,
-				     val);
+			intel_dkl_phy_rmw(dev_priv, DKL_TX_DPCNTL2(tc_port), ln,
+					  DKL_TX_DPCNTL2_CFG_LOADGENSELECT_TX1_MASK |
+					  DKL_TX_DPCNTL2_CFG_LOADGENSELECT_TX2_MASK,
+					  val);
 		}
 	}
 }
@@ -2019,12 +2017,8 @@ icl_program_mg_dp_mode(struct intel_digital_port *dig_port,
 		return;
 
 	if (DISPLAY_VER(dev_priv) >= 12) {
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, 0x0));
-		ln0 = intel_de_read(dev_priv, DKL_DP_MODE(tc_port));
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, 0x1));
-		ln1 = intel_de_read(dev_priv, DKL_DP_MODE(tc_port));
+		ln0 = intel_dkl_phy_read(dev_priv, DKL_DP_MODE(tc_port), 0);
+		ln1 = intel_dkl_phy_read(dev_priv, DKL_DP_MODE(tc_port), 1);
 	} else {
 		ln0 = intel_de_read(dev_priv, MG_DP_MODE(0, tc_port));
 		ln1 = intel_de_read(dev_priv, MG_DP_MODE(1, tc_port));
@@ -2085,12 +2079,8 @@ icl_program_mg_dp_mode(struct intel_digital_port *dig_port,
 	}
 
 	if (DISPLAY_VER(dev_priv) >= 12) {
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, 0x0));
-		intel_de_write(dev_priv, DKL_DP_MODE(tc_port), ln0);
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, 0x1));
-		intel_de_write(dev_priv, DKL_DP_MODE(tc_port), ln1);
+		intel_dkl_phy_write(dev_priv, DKL_DP_MODE(tc_port), 0, ln0);
+		intel_dkl_phy_write(dev_priv, DKL_DP_MODE(tc_port), 1, ln1);
 	} else {
 		intel_de_write(dev_priv, MG_DP_MODE(0, tc_port), ln0);
 		intel_de_write(dev_priv, MG_DP_MODE(1, tc_port), ln1);
@@ -3094,10 +3084,8 @@ static void adlp_tbt_to_dp_alt_switch_wa(struct intel_encoder *encoder)
 	enum tc_port tc_port = intel_port_to_tc(i915, encoder->port);
 	int ln;
 
-	for (ln = 0; ln < 2; ln++) {
-		intel_de_write(i915, HIP_INDEX_REG(tc_port), HIP_INDEX_VAL(tc_port, ln));
-		intel_de_rmw(i915, DKL_PCS_DW5(tc_port), DKL_PCS_DW5_CORE_SOFTRESET, 0);
-	}
+	for (ln = 0; ln < 2; ln++)
+		intel_dkl_phy_rmw(i915, DKL_PCS_DW5(tc_port), ln, DKL_PCS_DW5_CORE_SOFTRESET, 0);
 }
 
 static void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp,

drivers/gpu/drm/i915/display/intel_display_core.h

@@ -315,6 +315,14 @@ struct intel_display {
 		struct intel_global_obj obj;
 	} dbuf;
 
+	struct {
+		/*
+		 * dkl.phy_lock protects against concurrent access of the
+		 * Dekel TypeC PHYs.
+		 */
+		spinlock_t phy_lock;
+	} dkl;
+
 	struct {
 		/* VLV/CHV/BXT/GLK DSI MMIO register base address */
 		u32 mmio_base;

drivers/gpu/drm/i915/display/intel_display_power_well.c

@@ -12,6 +12,7 @@
 #include "intel_de.h"
 #include "intel_display_power_well.h"
 #include "intel_display_types.h"
+#include "intel_dkl_phy.h"
 #include "intel_dmc.h"
 #include "intel_dpio_phy.h"
 #include "intel_dpll.h"
@@ -529,11 +530,9 @@ icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
 		enum tc_port tc_port;
 
 		tc_port = TGL_AUX_PW_TO_TC_PORT(i915_power_well_instance(power_well)->hsw.idx);
-		intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-			       HIP_INDEX_VAL(tc_port, 0x2));
 
-		if (intel_de_wait_for_set(dev_priv, DKL_CMN_UC_DW_27(tc_port),
-					  DKL_CMN_UC_DW27_UC_HEALTH, 1))
+		if (wait_for(intel_dkl_phy_read(dev_priv, DKL_CMN_UC_DW_27(tc_port), 2) &
+			     DKL_CMN_UC_DW27_UC_HEALTH, 1))
 			drm_warn(&dev_priv->drm,
 				 "Timeout waiting TC uC health\n");
 	}

drivers/gpu/drm/i915/display/intel_dkl_phy.c

+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "i915_reg.h"
+
+#include "intel_de.h"
+#include "intel_display.h"
+#include "intel_dkl_phy.h"
+
+static void
+dkl_phy_set_hip_idx(struct drm_i915_private *i915, i915_reg_t reg, int idx)
+{
+	enum tc_port tc_port = DKL_REG_TC_PORT(reg);
+
+	drm_WARN_ON(&i915->drm, tc_port < TC_PORT_1 || tc_port >= I915_MAX_TC_PORTS);
+
+	intel_de_write(i915,
+		       HIP_INDEX_REG(tc_port),
+		       HIP_INDEX_VAL(tc_port, idx));
+}
+
+/**
+ * intel_dkl_phy_read - read a Dekel PHY register
+ * @i915: i915 device instance
+ * @reg: Dekel PHY register
+ * @ln: lane instance of @reg
+ *
+ * Read the @reg Dekel PHY register.
+ *
+ * Returns the read value.
+ */
+u32
+intel_dkl_phy_read(struct drm_i915_private *i915, i915_reg_t reg, int ln)
+{
+	u32 val;
+
+	spin_lock(&i915->display.dkl.phy_lock);
+
+	dkl_phy_set_hip_idx(i915, reg, ln);
+	val = intel_de_read(i915, reg);
+
+	spin_unlock(&i915->display.dkl.phy_lock);
+
+	return val;
+}
+
+/**
+ * intel_dkl_phy_write - write a Dekel PHY register
+ * @i915: i915 device instance
+ * @reg: Dekel PHY register
+ * @ln: lane instance of @reg
+ * @val: value to write
+ *
+ * Write @val to the @reg Dekel PHY register.
+ */
+void
+intel_dkl_phy_write(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 val)
+{
+	spin_lock(&i915->display.dkl.phy_lock);
+
+	dkl_phy_set_hip_idx(i915, reg, ln);
+	intel_de_write(i915, reg, val);
+
+	spin_unlock(&i915->display.dkl.phy_lock);
+}
+
+/**
+ * intel_dkl_phy_rmw - read-modify-write a Dekel PHY register
+ * @i915: i915 device instance
+ * @reg: Dekel PHY register
+ * @ln: lane instance of @reg
+ * @clear: mask to clear
+ * @set: mask to set
+ *
+ * Read the @reg Dekel PHY register, clearing then setting the @clear/@set bits in it, and writing
+ * this value back to the register if the value differs from the read one.
+ */
+void
+intel_dkl_phy_rmw(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 clear, u32 set)
+{
+	spin_lock(&i915->display.dkl.phy_lock);
+
+	dkl_phy_set_hip_idx(i915, reg, ln);
+	intel_de_rmw(i915, reg, clear, set);
+
+	spin_unlock(&i915->display.dkl.phy_lock);
+}
+
+/**
+ * intel_dkl_phy_posting_read - do a posting read from a Dekel PHY register
+ * @i915: i915 device instance
+ * @reg: Dekel PHY register
+ * @ln: lane instance of @reg
+ *
+ * Read the @reg Dekel PHY register without returning the read value.
+ */
+void
+intel_dkl_phy_posting_read(struct drm_i915_private *i915, i915_reg_t reg, int ln)
+{
+	spin_lock(&i915->display.dkl.phy_lock);
+
+	dkl_phy_set_hip_idx(i915, reg, ln);
+	intel_de_posting_read(i915, reg);
+
+	spin_unlock(&i915->display.dkl.phy_lock);
+}

drivers/gpu/drm/i915/display/intel_dkl_phy.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __INTEL_DKL_PHY_H__
+#define __INTEL_DKL_PHY_H__
+
+#include <linux/types.h>
+
+#include "i915_reg_defs.h"
+
+struct drm_i915_private;
+
+u32
+intel_dkl_phy_read(struct drm_i915_private *i915, i915_reg_t reg, int ln);
+void
+intel_dkl_phy_write(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 val);
+void
+intel_dkl_phy_rmw(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 clear, u32 set);
+void
+intel_dkl_phy_posting_read(struct drm_i915_private *i915, i915_reg_t reg, int ln);
+
+#endif /* __INTEL_DKL_PHY_H__ */

drivers/gpu/drm/i915/display/intel_dp.c

@@ -5276,7 +5276,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 			      encoder->devdata, IS_ERR(edid) ? NULL : edid);
 
 	intel_panel_add_edid_fixed_modes(intel_connector,
-					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,
+					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE ||
 					 intel_vrr_is_capable(intel_connector));
 
 	/* MSO requires information from the EDID */

drivers/gpu/drm/i915/display/intel_dpll_mgr.c

@@ -25,6 +25,7 @@
 
 #include "intel_de.h"
 #include "intel_display_types.h"
+#include "intel_dkl_phy.h"
 #include "intel_dpio_phy.h"
 #include "intel_dpll.h"
 #include "intel_dpll_mgr.h"
@@ -3508,15 +3509,12 @@ static bool dkl_pll_get_hw_state(struct drm_i915_private *dev_priv,
 	 * All registers read here have the same HIP_INDEX_REG even though
 	 * they are on different building blocks
 	 */
-	intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-		       HIP_INDEX_VAL(tc_port, 0x2));
-
-	hw_state->mg_refclkin_ctl = intel_de_read(dev_priv,
-						  DKL_REFCLKIN_CTL(tc_port));
+	hw_state->mg_refclkin_ctl = intel_dkl_phy_read(dev_priv,
+						       DKL_REFCLKIN_CTL(tc_port), 2);
 	hw_state->mg_refclkin_ctl &= MG_REFCLKIN_CTL_OD_2_MUX_MASK;
 
 	hw_state->mg_clktop2_hsclkctl =
-		intel_de_read(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port));
+		intel_dkl_phy_read(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port), 2);
 	hw_state->mg_clktop2_hsclkctl &=
 		MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
 		MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
@@ -3524,32 +3522,32 @@ static bool dkl_pll_get_hw_state(struct drm_i915_private *dev_priv,
 		MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK;
 
 	hw_state->mg_clktop2_coreclkctl1 =
-		intel_de_read(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port));
+		intel_dkl_phy_read(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port), 2);
 	hw_state->mg_clktop2_coreclkctl1 &=
 		MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
 
-	hw_state->mg_pll_div0 = intel_de_read(dev_priv, DKL_PLL_DIV0(tc_port));
+	hw_state->mg_pll_div0 = intel_dkl_phy_read(dev_priv, DKL_PLL_DIV0(tc_port), 2);
 	val = DKL_PLL_DIV0_MASK;
 	if (dev_priv->display.vbt.override_afc_startup)
 		val |= DKL_PLL_DIV0_AFC_STARTUP_MASK;
 	hw_state->mg_pll_div0 &= val;
 
-	hw_state->mg_pll_div1 = intel_de_read(dev_priv, DKL_PLL_DIV1(tc_port));
+	hw_state->mg_pll_div1 = intel_dkl_phy_read(dev_priv, DKL_PLL_DIV1(tc_port), 2);
 	hw_state->mg_pll_div1 &= (DKL_PLL_DIV1_IREF_TRIM_MASK |
 				  DKL_PLL_DIV1_TDC_TARGET_CNT_MASK);
 
-	hw_state->mg_pll_ssc = intel_de_read(dev_priv, DKL_PLL_SSC(tc_port));
+	hw_state->mg_pll_ssc = intel_dkl_phy_read(dev_priv, DKL_PLL_SSC(tc_port), 2);
 	hw_state->mg_pll_ssc &= (DKL_PLL_SSC_IREF_NDIV_RATIO_MASK |
 				 DKL_PLL_SSC_STEP_LEN_MASK |
 				 DKL_PLL_SSC_STEP_NUM_MASK |
 				 DKL_PLL_SSC_EN);
 
-	hw_state->mg_pll_bias = intel_de_read(dev_priv, DKL_PLL_BIAS(tc_port));
+	hw_state->mg_pll_bias = intel_dkl_phy_read(dev_priv, DKL_PLL_BIAS(tc_port), 2);
 	hw_state->mg_pll_bias &= (DKL_PLL_BIAS_FRAC_EN_H |
 				  DKL_PLL_BIAS_FBDIV_FRAC_MASK);
 
 	hw_state->mg_pll_tdc_coldst_bias =
-		intel_de_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port));
+		intel_dkl_phy_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port), 2);
 	hw_state->mg_pll_tdc_coldst_bias &= (DKL_PLL_TDC_SSC_STEP_SIZE_MASK |
 					     DKL_PLL_TDC_FEED_FWD_GAIN_MASK);
 
@@ -3737,61 +3735,58 @@ static void dkl_pll_write(struct drm_i915_private *dev_priv,
 	 * All registers programmed here have the same HIP_INDEX_REG even
 	 * though on different building block
 	 */
-	intel_de_write(dev_priv, HIP_INDEX_REG(tc_port),
-		       HIP_INDEX_VAL(tc_port, 0x2));
-
 	/* All the registers are RMW */
-	val = intel_de_read(dev_priv, DKL_REFCLKIN_CTL(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_REFCLKIN_CTL(tc_port), 2);
 	val &= ~MG_REFCLKIN_CTL_OD_2_MUX_MASK;
 	val |= hw_state->mg_refclkin_ctl;
-	intel_de_write(dev_priv, DKL_REFCLKIN_CTL(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_REFCLKIN_CTL(tc_port), 2, val);
 
-	val = intel_de_read(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port), 2);
 	val &= ~MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
 	val |= hw_state->mg_clktop2_coreclkctl1;
-	intel_de_write(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_CLKTOP2_CORECLKCTL1(tc_port), 2, val);
 
-	val = intel_de_read(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port), 2);
 	val &= ~(MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
 		 MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
 		 MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
 		 MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK);
 	val |= hw_state->mg_clktop2_hsclkctl;
-	intel_de_write(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_CLKTOP2_HSCLKCTL(tc_port), 2, val);
 
 	val = DKL_PLL_DIV0_MASK;
 	if (dev_priv->display.vbt.override_afc_startup)
 		val |= DKL_PLL_DIV0_AFC_STARTUP_MASK;
-	intel_de_rmw(dev_priv, DKL_PLL_DIV0(tc_port), val,
-		     hw_state->mg_pll_div0);
+	intel_dkl_phy_rmw(dev_priv, DKL_PLL_DIV0(tc_port), 2, val,
+			  hw_state->mg_pll_div0);
 
-	val = intel_de_read(dev_priv, DKL_PLL_DIV1(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_PLL_DIV1(tc_port), 2);
 	val &= ~(DKL_PLL_DIV1_IREF_TRIM_MASK |
 		 DKL_PLL_DIV1_TDC_TARGET_CNT_MASK);
 	val |= hw_state->mg_pll_div1;
-	intel_de_write(dev_priv, DKL_PLL_DIV1(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_PLL_DIV1(tc_port), 2, val);
 
-	val = intel_de_read(dev_priv, DKL_PLL_SSC(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_PLL_SSC(tc_port), 2);
 	val &= ~(DKL_PLL_SSC_IREF_NDIV_RATIO_MASK |
 		 DKL_PLL_SSC_STEP_LEN_MASK |
 		 DKL_PLL_SSC_STEP_NUM_MASK |
 		 DKL_PLL_SSC_EN);
 	val |= hw_state->mg_pll_ssc;
-	intel_de_write(dev_priv, DKL_PLL_SSC(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_PLL_SSC(tc_port), 2, val);
 
-	val = intel_de_read(dev_priv, DKL_PLL_BIAS(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_PLL_BIAS(tc_port), 2);
 	val &= ~(DKL_PLL_BIAS_FRAC_EN_H |
 		 DKL_PLL_BIAS_FBDIV_FRAC_MASK);
 	val |= hw_state->mg_pll_bias;
-	intel_de_write(dev_priv, DKL_PLL_BIAS(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_PLL_BIAS(tc_port), 2, val);
 
-	val = intel_de_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port));
+	val = intel_dkl_phy_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port), 2);
 	val &= ~(DKL_PLL_TDC_SSC_STEP_SIZE_MASK |
 		 DKL_PLL_TDC_FEED_FWD_GAIN_MASK);
 	val |= hw_state->mg_pll_tdc_coldst_bias;
-	intel_de_write(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port), val);
+	intel_dkl_phy_write(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port), 2, val);
 
-	intel_de_posting_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port));
+	intel_dkl_phy_posting_read(dev_priv, DKL_PLL_TDC_COLDST_BIAS(tc_port), 2);
 }
 
 static void icl_pll_power_enable(struct drm_i915_private *dev_priv,

drivers/gpu/drm/i915/display/intel_lvds.c

@@ -972,8 +972,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 
 	/* Try EDID first */
 	intel_panel_add_edid_fixed_modes(intel_connector,
-					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,
-					 false);
+					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE);
 
 	/* Failed to get EDID, what about VBT? */
 	if (!intel_panel_preferred_fixed_mode(intel_connector))

drivers/gpu/drm/i915/display/intel_panel.c

@@ -254,10 +254,10 @@ static void intel_panel_destroy_probed_modes(struct intel_connector *connector)
 }
 
 void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
-				      bool has_drrs, bool has_vrr)
+				      bool use_alt_fixed_modes)
 {
 	intel_panel_add_edid_preferred_mode(connector);
-	if (intel_panel_preferred_fixed_mode(connector) && (has_drrs || has_vrr))
+	if (intel_panel_preferred_fixed_mode(connector) && use_alt_fixed_modes)
 		intel_panel_add_edid_alt_fixed_modes(connector);
 	intel_panel_destroy_probed_modes(connector);
 }

drivers/gpu/drm/i915/display/intel_panel.h

@@ -44,7 +44,7 @@ int intel_panel_fitting(struct intel_crtc_state *crtc_state,
 int intel_panel_compute_config(struct intel_connector *connector,
 			       struct drm_display_mode *adjusted_mode);
 void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
-				      bool has_drrs, bool has_vrr);
+				      bool use_alt_fixed_modes);
 void intel_panel_add_vbt_lfp_fixed_mode(struct intel_connector *connector);
 void intel_panel_add_vbt_sdvo_fixed_mode(struct intel_connector *connector);
 void intel_panel_add_encoder_fixed_mode(struct intel_connector *connector,

drivers/gpu/drm/i915/display/intel_sdvo.c

@@ -2747,13 +2747,10 @@ intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device)
 	if (!intel_sdvo_connector)
 		return false;
 
-	if (device == 0) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS0;
+	if (device == 0)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS0;
-	} else if (device == 1) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS1;
+	else if (device == 1)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS1;
-	}
 
 	intel_connector = &intel_sdvo_connector->base;
 	connector = &intel_connector->base;
@@ -2808,7 +2805,6 @@ intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int type)
 	encoder->encoder_type = DRM_MODE_ENCODER_TVDAC;
 	connector->connector_type = DRM_MODE_CONNECTOR_SVIDEO;
 
-	intel_sdvo->controlled_output |= type;
 	intel_sdvo_connector->output_flag = type;
 
 	if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) {
@@ -2849,13 +2845,10 @@ intel_sdvo_analog_init(struct intel_sdvo *intel_sdvo, int device)
 	encoder->encoder_type = DRM_MODE_ENCODER_DAC;
 	connector->connector_type = DRM_MODE_CONNECTOR_VGA;
 
-	if (device == 0) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB0;
+	if (device == 0)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB0;
-	} else if (device == 1) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB1;
+	else if (device == 1)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB1;
-	}
 
 	if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) {
 		kfree(intel_sdvo_connector);
@@ -2885,13 +2878,10 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	encoder->encoder_type = DRM_MODE_ENCODER_LVDS;
 	connector->connector_type = DRM_MODE_CONNECTOR_LVDS;
 
-	if (device == 0) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS0;
+	if (device == 0)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS0;
-	} else if (device == 1) {
-		intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS1;
+	else if (device == 1)
 		intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS1;
-	}
 
 	if (intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo) < 0) {
 		kfree(intel_sdvo_connector);
@@ -2910,8 +2900,12 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	intel_panel_add_vbt_sdvo_fixed_mode(intel_connector);
 
 	if (!intel_panel_preferred_fixed_mode(intel_connector)) {
+		mutex_lock(&i915->drm.mode_config.mutex);
+
 		intel_ddc_get_modes(connector, &intel_sdvo->ddc);
-		intel_panel_add_edid_fixed_modes(intel_connector, false, false);
+		intel_panel_add_edid_fixed_modes(intel_connector, false);
+
+		mutex_unlock(&i915->drm.mode_config.mutex);
 	}
 
 	intel_panel_init(intel_connector);
@@ -2926,16 +2920,39 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	return false;
 }
 
+static u16 intel_sdvo_filter_output_flags(u16 flags)
+{
+	flags &= SDVO_OUTPUT_MASK;
+
+	/* SDVO requires XXX1 function may not exist unless it has XXX0 function.*/
+	if (!(flags & SDVO_OUTPUT_TMDS0))
+		flags &= ~SDVO_OUTPUT_TMDS1;
+
+	if (!(flags & SDVO_OUTPUT_RGB0))
+		flags &= ~SDVO_OUTPUT_RGB1;
+
+	if (!(flags & SDVO_OUTPUT_LVDS0))
+		flags &= ~SDVO_OUTPUT_LVDS1;
+
+	return flags;
+}
+
 static bool
 intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, u16 flags)
 {
-	/* SDVO requires XXX1 function may not exist unless it has XXX0 function.*/
+	struct drm_i915_private *i915 = to_i915(intel_sdvo->base.base.dev);
+
+	flags = intel_sdvo_filter_output_flags(flags);
+
+	intel_sdvo->controlled_output = flags;
+
+	intel_sdvo_select_ddc_bus(i915, intel_sdvo);
 
 	if (flags & SDVO_OUTPUT_TMDS0)
 		if (!intel_sdvo_dvi_init(intel_sdvo, 0))
 			return false;
 
-	if ((flags & SDVO_TMDS_MASK) == SDVO_TMDS_MASK)
+	if (flags & SDVO_OUTPUT_TMDS1)
 		if (!intel_sdvo_dvi_init(intel_sdvo, 1))
 			return false;
 
@@ -2956,7 +2973,7 @@ intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, u16 flags)
 		if (!intel_sdvo_analog_init(intel_sdvo, 0))
 			return false;
 
-	if ((flags & SDVO_RGB_MASK) == SDVO_RGB_MASK)
+	if (flags & SDVO_OUTPUT_RGB1)
 		if (!intel_sdvo_analog_init(intel_sdvo, 1))
 			return false;
 
@@ -2964,14 +2981,13 @@ intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, u16 flags)
 		if (!intel_sdvo_lvds_init(intel_sdvo, 0))
 			return false;
 
-	if ((flags & SDVO_LVDS_MASK) == SDVO_LVDS_MASK)
+	if (flags & SDVO_OUTPUT_LVDS1)
 		if (!intel_sdvo_lvds_init(intel_sdvo, 1))
 			return false;
 
-	if ((flags & SDVO_OUTPUT_MASK) == 0) {
+	if (flags == 0) {
 		unsigned char bytes[2];
 
-		intel_sdvo->controlled_output = 0;
 		memcpy(bytes, &intel_sdvo->caps.output_flags, 2);
 		DRM_DEBUG_KMS("%s: Unknown SDVO output type (0x%02x%02x)\n",
 			      SDVO_NAME(intel_sdvo),
@@ -3383,8 +3399,6 @@ bool intel_sdvo_init(struct drm_i915_private *dev_priv,
 	 */
 	intel_sdvo->base.cloneable = 0;
 
-	intel_sdvo_select_ddc_bus(dev_priv, intel_sdvo);
-
 	/* Set the input timing to the screen. Assume always input 0. */
 	if (!intel_sdvo_set_target_input(intel_sdvo))
 		goto err_output;

drivers/gpu/drm/i915/gem/i915_gem_internal.c

@@ -6,7 +6,6 @@
 
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
-#include <linux/swiotlb.h>
 
 #include "i915_drv.h"
 #include "i915_gem.h"
@@ -38,22 +37,12 @@ static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
 	struct scatterlist *sg;
 	unsigned int sg_page_sizes;
 	unsigned int npages;
-	int max_order;
+	int max_order = MAX_ORDER;
+	unsigned int max_segment;
 	gfp_t gfp;
 
-	max_order = MAX_ORDER;
-#ifdef CONFIG_SWIOTLB
-	if (is_swiotlb_active(obj->base.dev->dev)) {
-		unsigned int max_segment;
-
-		max_segment = swiotlb_max_segment();
-		if (max_segment) {
-			max_segment = max_t(unsigned int, max_segment,
-					    PAGE_SIZE) >> PAGE_SHIFT;
-			max_order = min(max_order, ilog2(max_segment));
-		}
-	}
-#endif
+	max_segment = i915_sg_segment_size(i915->drm.dev) >> PAGE_SHIFT;
+	max_order = min(max_order, get_order(max_segment));
 
 	gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_RECLAIMABLE;
 	if (IS_I965GM(i915) || IS_I965G(i915)) {

drivers/gpu/drm/i915/gem/i915_gem_shmem.c

@@ -194,7 +194,7 @@ static int shmem_get_pages(struct drm_i915_gem_object *obj)
 	struct intel_memory_region *mem = obj->mm.region;
 	struct address_space *mapping = obj->base.filp->f_mapping;
 	const unsigned long page_count = obj->base.size / PAGE_SIZE;
-	unsigned int max_segment = i915_sg_segment_size();
+	unsigned int max_segment = i915_sg_segment_size(i915->drm.dev);
 	struct sg_table *st;
 	struct sgt_iter sgt_iter;
 	struct page *page;

drivers/gpu/drm/i915/gem/i915_gem_ttm.c

@@ -189,7 +189,7 @@ static int i915_ttm_tt_shmem_populate(struct ttm_device *bdev,
 	struct drm_i915_private *i915 = container_of(bdev, typeof(*i915), bdev);
 	struct intel_memory_region *mr = i915->mm.regions[INTEL_MEMORY_SYSTEM];
 	struct i915_ttm_tt *i915_tt = container_of(ttm, typeof(*i915_tt), ttm);
-	const unsigned int max_segment = i915_sg_segment_size();
+	const unsigned int max_segment = i915_sg_segment_size(i915->drm.dev);
 	const size_t size = (size_t)ttm->num_pages << PAGE_SHIFT;
 	struct file *filp = i915_tt->filp;
 	struct sgt_iter sgt_iter;
@@ -538,7 +538,7 @@ static struct i915_refct_sgt *i915_ttm_tt_get_st(struct ttm_tt *ttm)
 	ret = sg_alloc_table_from_pages_segment(st,
 			ttm->pages, ttm->num_pages,
 			0, (unsigned long)ttm->num_pages << PAGE_SHIFT,
-			i915_sg_segment_size(), GFP_KERNEL);
+			i915_sg_segment_size(i915_tt->dev), GFP_KERNEL);
 	if (ret) {
 		st->sgl = NULL;
 		return ERR_PTR(ret);

drivers/gpu/drm/i915/gem/i915_gem_userptr.c

@@ -129,7 +129,7 @@ static void i915_gem_object_userptr_drop_ref(struct drm_i915_gem_object *obj)
 static int i915_gem_userptr_get_pages(struct drm_i915_gem_object *obj)
 {
 	const unsigned long num_pages = obj->base.size >> PAGE_SHIFT;
-	unsigned int max_segment = i915_sg_segment_size();
+	unsigned int max_segment = i915_sg_segment_size(obj->base.dev->dev);
 	struct sg_table *st;
 	unsigned int sg_page_sizes;
 	struct page **pvec;

drivers/gpu/drm/i915/i915_driver.c

@@ -353,6 +353,7 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
 	mutex_init(&dev_priv->display.wm.wm_mutex);
 	mutex_init(&dev_priv->display.pps.mutex);
 	mutex_init(&dev_priv->display.hdcp.comp_mutex);
+	spin_lock_init(&dev_priv->display.dkl.phy_lock);
 
 	i915_memcpy_init_early(dev_priv);
 	intel_runtime_pm_init_early(&dev_priv->runtime_pm);

drivers/gpu/drm/i915/i915_reg.h

@@ -7420,6 +7420,9 @@ enum skl_power_gate {
 #define _DKL_PHY5_BASE			0x16C000
 #define _DKL_PHY6_BASE			0x16D000
 
+#define DKL_REG_TC_PORT(__reg) \
+	(TC_PORT_1 + ((__reg).reg - _DKL_PHY1_BASE) / (_DKL_PHY2_BASE - _DKL_PHY1_BASE))
+
 /* DEKEL PHY MMIO Address = Phy base + (internal address & ~index_mask) */
 #define _DKL_PCS_DW5			0x14
 #define DKL_PCS_DW5(tc_port)		_MMIO(_PORT(tc_port, _DKL_PHY1_BASE, \

drivers/gpu/drm/i915/i915_scatterlist.h

@@ -9,7 +9,8 @@
 
 #include <linux/pfn.h>
 #include <linux/scatterlist.h>
-#include <linux/swiotlb.h>
+#include <linux/dma-mapping.h>
+#include <xen/xen.h>
 
 #include "i915_gem.h"
 
@@ -127,19 +128,26 @@ static inline unsigned int i915_sg_dma_sizes(struct scatterlist *sg)
 	return page_sizes;
 }
 
-static inline unsigned int i915_sg_segment_size(void)
+static inline unsigned int i915_sg_segment_size(struct device *dev)
 {
-	unsigned int size = swiotlb_max_segment();
-
-	if (size == 0)
-		size = UINT_MAX;
-
-	size = rounddown(size, PAGE_SIZE);
-	/* swiotlb_max_segment_size can return 1 byte when it means one page. */
-	if (size < PAGE_SIZE)
-		size = PAGE_SIZE;
-
-	return size;
+	size_t max = min_t(size_t, UINT_MAX, dma_max_mapping_size(dev));
+
+	/*
+	 * For Xen PV guests pages aren't contiguous in DMA (machine) address
+	 * space.  The DMA API takes care of that both in dma_alloc_* (by
+	 * calling into the hypervisor to make the pages contiguous) and in
+	 * dma_map_* (by bounce buffering).  But i915 abuses ignores the
+	 * coherency aspects of the DMA API and thus can't cope with bounce
+	 * buffering actually happening, so add a hack here to force small
+	 * allocations and mappings when running in PV mode on Xen.
+	 *
+	 * Note this will still break if bounce buffering is required for other
+	 * reasons, like confidential computing hypervisors or PCIe root ports
+	 * with addressing limitations.
+	 */
+	if (xen_pv_domain())
+		max = PAGE_SIZE;
+	return round_down(max, PAGE_SIZE);
 }
 
 bool i915_sg_trim(struct sg_table *orig_st);