1 files changed, 126 insertions, 69 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index 841708da5a56..44bbc7e74fc3 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -4,15 +4,15 @@
  */
 
 #include "intel_combo_phy.h"
-#include "intel_drv.h"
+#include "intel_display_types.h"
 
-#define for_each_combo_port(__dev_priv, __port) \
-	for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++)	\
-		for_each_if(intel_port_is_combophy(__dev_priv, __port))
+#define for_each_combo_phy(__dev_priv, __phy) \
+	for ((__phy) = PHY_A; (__phy) < I915_MAX_PHYS; (__phy)++)	\
+		for_each_if(intel_phy_is_combo(__dev_priv, __phy))
 
-#define for_each_combo_port_reverse(__dev_priv, __port) \
-	for ((__port) = I915_MAX_PORTS; (__port)-- > PORT_A;) \
-		for_each_if(intel_port_is_combophy(__dev_priv, __port))
+#define for_each_combo_phy_reverse(__dev_priv, __phy) \
+	for ((__phy) = I915_MAX_PHYS; (__phy)-- > PHY_A;) \
+		for_each_if(intel_phy_is_combo(__dev_priv, __phy))
 
 enum {
 	PROCMON_0_85V_DOT_0,
@@ -38,18 +38,17 @@ static const struct cnl_procmon {
 };
 
 /*
- * CNL has just one set of registers, while ICL has two sets: one for port A and
- * the other for port B. The CNL registers are equivalent to the ICL port A
- * registers, that's why we call the ICL macros even though the function has CNL
- * on its name.
+ * CNL has just one set of registers, while gen11 has a set for each combo PHY.
+ * The CNL registers are equivalent to the gen11 PHY A registers, that's why we
+ * call the ICL macros even though the function has CNL on its name.
  */
 static const struct cnl_procmon *
-cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum port port)
+cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum phy phy)
 {
 	const struct cnl_procmon *procmon;
 	u32 val;
 
-	val = I915_READ(ICL_PORT_COMP_DW3(port));
+	val = I915_READ(ICL_PORT_COMP_DW3(phy));
 	switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
 	default:
 		MISSING_CASE(val);
@@ -75,32 +74,32 @@ cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum port port)
 }
 
 static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv,
-				       enum port port)
+				       enum phy phy)
 {
 	const struct cnl_procmon *procmon;
 	u32 val;
 
-	procmon = cnl_get_procmon_ref_values(dev_priv, port);
+	procmon = cnl_get_procmon_ref_values(dev_priv, phy);
 
-	val = I915_READ(ICL_PORT_COMP_DW1(port));
+	val = I915_READ(ICL_PORT_COMP_DW1(phy));
 	val &= ~((0xff << 16) | 0xff);
 	val |= procmon->dw1;
-	I915_WRITE(ICL_PORT_COMP_DW1(port), val);
+	I915_WRITE(ICL_PORT_COMP_DW1(phy), val);
 
-	I915_WRITE(ICL_PORT_COMP_DW9(port), procmon->dw9);
-	I915_WRITE(ICL_PORT_COMP_DW10(port), procmon->dw10);
+	I915_WRITE(ICL_PORT_COMP_DW9(phy), procmon->dw9);
+	I915_WRITE(ICL_PORT_COMP_DW10(phy), procmon->dw10);
 }
 
 static bool check_phy_reg(struct drm_i915_private *dev_priv,
-			  enum port port, i915_reg_t reg, u32 mask,
+			  enum phy phy, i915_reg_t reg, u32 mask,
 			  u32 expected_val)
 {
 	u32 val = I915_READ(reg);
 
 	if ((val & mask) != expected_val) {
-		DRM_DEBUG_DRIVER("Port %c combo PHY reg %08x state mismatch: "
+		DRM_DEBUG_DRIVER("Combo PHY %c reg %08x state mismatch: "
 				 "current %08x mask %08x expected %08x\n",
-				 port_name(port),
+				 phy_name(phy),
 				 reg.reg, val, mask, expected_val);
 		return false;
 	}
@@ -109,18 +108,18 @@ static bool check_phy_reg(struct drm_i915_private *dev_priv,
 }
 
 static bool cnl_verify_procmon_ref_values(struct drm_i915_private *dev_priv,
-					  enum port port)
+					  enum phy phy)
 {
 	const struct cnl_procmon *procmon;
 	bool ret;
 
-	procmon = cnl_get_procmon_ref_values(dev_priv, port);
+	procmon = cnl_get_procmon_ref_values(dev_priv, phy);
 
-	ret = check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW1(port),
+	ret = check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW1(phy),
 			    (0xff << 16) | 0xff, procmon->dw1);
-	ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW9(port),
+	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW9(phy),
 			     -1U, procmon->dw9);
-	ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW10(port),
+	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW10(phy),
 			     -1U, procmon->dw10);
 
 	return ret;
@@ -134,15 +133,15 @@ static bool cnl_combo_phy_enabled(struct drm_i915_private *dev_priv)
 
 static bool cnl_combo_phy_verify_state(struct drm_i915_private *dev_priv)
 {
-	enum port port = PORT_A;
+	enum phy phy = PHY_A;
 	bool ret;
 
 	if (!cnl_combo_phy_enabled(dev_priv))
 		return false;
 
-	ret = cnl_verify_procmon_ref_values(dev_priv, port);
+	ret = cnl_verify_procmon_ref_values(dev_priv, phy);
 
-	ret &= check_phy_reg(dev_priv, port, CNL_PORT_CL1CM_DW5,
+	ret &= check_phy_reg(dev_priv, phy, CNL_PORT_CL1CM_DW5,
 			     CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
 
 	return ret;
@@ -157,7 +156,7 @@ static void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
 	I915_WRITE(CHICKEN_MISC_2, val);
 
 	/* Dummy PORT_A to get the correct CNL register from the ICL macro */
-	cnl_set_procmon_ref_values(dev_priv, PORT_A);
+	cnl_set_procmon_ref_values(dev_priv, PHY_A);
 
 	val = I915_READ(CNL_PORT_COMP_DW0);
 	val |= COMP_INIT;
@@ -181,35 +180,39 @@ static void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv)
 }
 
 static bool icl_combo_phy_enabled(struct drm_i915_private *dev_priv,
-				  enum port port)
+				  enum phy phy)
 {
-	return !(I915_READ(ICL_PHY_MISC(port)) &
-		 ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN) &&
-		(I915_READ(ICL_PORT_COMP_DW0(port)) & COMP_INIT);
+	/* The PHY C added by EHL has no PHY_MISC register */
+	if (IS_ELKHARTLAKE(dev_priv) && phy == PHY_C)
+		return I915_READ(ICL_PORT_COMP_DW0(phy)) & COMP_INIT;
+	else
+		return !(I915_READ(ICL_PHY_MISC(phy)) &
+			 ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN) &&
+			(I915_READ(ICL_PORT_COMP_DW0(phy)) & COMP_INIT);
 }
 
 static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
-				       enum port port)
+				       enum phy phy)
 {
 	bool ret;
 
-	if (!icl_combo_phy_enabled(dev_priv, port))
+	if (!icl_combo_phy_enabled(dev_priv, phy))
 		return false;
 
-	ret = cnl_verify_procmon_ref_values(dev_priv, port);
+	ret = cnl_verify_procmon_ref_values(dev_priv, phy);
 
-	if (port == PORT_A)
-		ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW8(port),
+	if (phy == PHY_A)
+		ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW8(phy),
 				     IREFGEN, IREFGEN);
 
-	ret &= check_phy_reg(dev_priv, port, ICL_PORT_CL_DW5(port),
+	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_CL_DW5(phy),
 			     CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
 
 	return ret;
 }
 
 void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
-				    enum port port, bool is_dsi,
+				    enum phy phy, bool is_dsi,
 				    int lane_count, bool lane_reversal)
 {
 	u8 lane_mask;
@@ -254,66 +257,120 @@ void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
 		}
 	}
 
-	val = I915_READ(ICL_PORT_CL_DW10(port));
+	val = I915_READ(ICL_PORT_CL_DW10(phy));
 	val &= ~PWR_DOWN_LN_MASK;
 	val |= lane_mask << PWR_DOWN_LN_SHIFT;
-	I915_WRITE(ICL_PORT_CL_DW10(port), val);
+	I915_WRITE(ICL_PORT_CL_DW10(phy), val);
+}
+
+static u32 ehl_combo_phy_a_mux(struct drm_i915_private *i915, u32 val)
+{
+	bool ddi_a_present = i915->vbt.ddi_port_info[PORT_A].child != NULL;
+	bool ddi_d_present = i915->vbt.ddi_port_info[PORT_D].child != NULL;
+	bool dsi_present = intel_bios_is_dsi_present(i915, NULL);
+
+	/*
+	 * VBT's 'dvo port' field for child devices references the DDI, not
+	 * the PHY.  So if combo PHY A is wired up to drive an external
+	 * display, we should see a child device present on PORT_D and
+	 * nothing on PORT_A and no DSI.
+	 */
+	if (ddi_d_present && !ddi_a_present && !dsi_present)
+		return val | ICL_PHY_MISC_MUX_DDID;
+
+	/*
+	 * If we encounter a VBT that claims to have an external display on
+	 * DDI-D _and_ an internal display on DDI-A/DSI leave an error message
+	 * in the log and let the internal display win.
+	 */
+	if (ddi_d_present)
+		DRM_ERROR("VBT claims to have both internal and external displays on PHY A.  Configuring for internal.\n");
+
+	return val & ~ICL_PHY_MISC_MUX_DDID;
 }
 
 static void icl_combo_phys_init(struct drm_i915_private *dev_priv)
 {
-	enum port port;
+	enum phy phy;
 
-	for_each_combo_port(dev_priv, port) {
+	for_each_combo_phy(dev_priv, phy) {
 		u32 val;
 
-		if (icl_combo_phy_verify_state(dev_priv, port)) {
-			DRM_DEBUG_DRIVER("Port %c combo PHY already enabled, won't reprogram it.\n",
-					 port_name(port));
+		if (icl_combo_phy_verify_state(dev_priv, phy)) {
+			DRM_DEBUG_DRIVER("Combo PHY %c already enabled, won't reprogram it.\n",
+					 phy_name(phy));
 			continue;
 		}
 
-		val = I915_READ(ICL_PHY_MISC(port));
+		/*
+		 * Although EHL adds a combo PHY C, there's no PHY_MISC
+		 * register for it and no need to program the
+		 * DE_IO_COMP_PWR_DOWN setting on PHY C.
+		 */
+		if (IS_ELKHARTLAKE(dev_priv) && phy == PHY_C)
+			goto skip_phy_misc;
+
+		/*
+		 * EHL's combo PHY A can be hooked up to either an external
+		 * display (via DDI-D) or an internal display (via DDI-A or
+		 * the DSI DPHY).  This is a motherboard design decision that
+		 * can't be changed on the fly, so initialize the PHY's mux
+		 * based on whether our VBT indicates the presence of any
+		 * "internal" child devices.
+		 */
+		val = I915_READ(ICL_PHY_MISC(phy));
+		if (IS_ELKHARTLAKE(dev_priv) && phy == PHY_A)
+			val = ehl_combo_phy_a_mux(dev_priv, val);
 		val &= ~ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
-		I915_WRITE(ICL_PHY_MISC(port), val);
+		I915_WRITE(ICL_PHY_MISC(phy), val);
 
-		cnl_set_procmon_ref_values(dev_priv, port);
+skip_phy_misc:
+		cnl_set_procmon_ref_values(dev_priv, phy);
 
-		if (port == PORT_A) {
-			val = I915_READ(ICL_PORT_COMP_DW8(port));
+		if (phy == PHY_A) {
+			val = I915_READ(ICL_PORT_COMP_DW8(phy));
 			val |= IREFGEN;
-			I915_WRITE(ICL_PORT_COMP_DW8(port), val);
+			I915_WRITE(ICL_PORT_COMP_DW8(phy), val);
 		}
 
-		val = I915_READ(ICL_PORT_COMP_DW0(port));
+		val = I915_READ(ICL_PORT_COMP_DW0(phy));
 		val |= COMP_INIT;
-		I915_WRITE(ICL_PORT_COMP_DW0(port), val);
+		I915_WRITE(ICL_PORT_COMP_DW0(phy), val);
 
-		val = I915_READ(ICL_PORT_CL_DW5(port));
+		val = I915_READ(ICL_PORT_CL_DW5(phy));
 		val |= CL_POWER_DOWN_ENABLE;
-		I915_WRITE(ICL_PORT_CL_DW5(port), val);
+		I915_WRITE(ICL_PORT_CL_DW5(phy), val);
 	}
 }
 
 static void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
 {
-	enum port port;
+	enum phy phy;
 
-	for_each_combo_port_reverse(dev_priv, port) {
+	for_each_combo_phy_reverse(dev_priv, phy) {
 		u32 val;
 
-		if (port == PORT_A &&
-		    !icl_combo_phy_verify_state(dev_priv, port))
-			DRM_WARN("Port %c combo PHY HW state changed unexpectedly\n",
-				 port_name(port));
+		if (phy == PHY_A &&
+		    !icl_combo_phy_verify_state(dev_priv, phy))
+			DRM_WARN("Combo PHY %c HW state changed unexpectedly\n",
+				 phy_name(phy));
+
+		/*
+		 * Although EHL adds a combo PHY C, there's no PHY_MISC
+		 * register for it and no need to program the
+		 * DE_IO_COMP_PWR_DOWN setting on PHY C.
+		 */
+		if (IS_ELKHARTLAKE(dev_priv) && phy == PHY_C)
+			goto skip_phy_misc;
 
-		val = I915_READ(ICL_PHY_MISC(port));
+		val = I915_READ(ICL_PHY_MISC(phy));
 		val |= ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
-		I915_WRITE(ICL_PHY_MISC(port), val);
+		I915_WRITE(ICL_PHY_MISC(phy), val);
 
-		val = I915_READ(ICL_PORT_COMP_DW0(port));
+skip_phy_misc:
+		val = I915_READ(ICL_PORT_COMP_DW0(phy));
 		val &= ~COMP_INIT;
-		I915_WRITE(ICL_PORT_COMP_DW0(port), val);
+		I915_WRITE(ICL_PORT_COMP_DW0(phy), val);
 	}
 }