drm/i915/display/tc: Rename safe_mode functions ownership

When DP_PHY_MODE_STATUS_NOT_SAFE is set, it means that display
has the control over the TC phy.
The "not safe" naming is confusing using ownership make it easier
to read also future platforms will have a new register that does the
same job as DP_PHY_MODE_STATUS_NOT_SAFE but with the onwership name.

BSpec: 49294
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210514153711.2359617-10-matthew.d.roper@intel.com

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

@@ -256,8 +256,8 @@ static bool icl_tc_phy_status_complete(struct intel_digital_port *dig_port)
 	return val & DP_PHY_MODE_STATUS_COMPLETED(dig_port->tc_phy_fia_idx);
 }
 
-static bool icl_tc_phy_set_safe_mode(struct intel_digital_port *dig_port,
-				     bool enable)
+static bool icl_tc_phy_take_ownership(struct intel_digital_port *dig_port,
+				      bool take)
 {
 	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
 	struct intel_uncore *uncore = &i915->uncore;
@@ -267,20 +267,20 @@ static bool icl_tc_phy_set_safe_mode(struct intel_digital_port *dig_port,
 				PORT_TX_DFLEXDPCSSS(dig_port->tc_phy_fia));
 	if (val == 0xffffffff) {
 		drm_dbg_kms(&i915->drm,
-			    "Port %s: PHY in TCCOLD, can't %s safe-mode\n",
-			    dig_port->tc_port_name, enabledisable(enable));
+			    "Port %s: PHY in TCCOLD, can't %s ownership\n",
+			    dig_port->tc_port_name, take ? "take" : "release");
 
 		return false;
 	}
 
 	val &= ~DP_PHY_MODE_STATUS_NOT_SAFE(dig_port->tc_phy_fia_idx);
-	if (!enable)
+	if (take)
 		val |= DP_PHY_MODE_STATUS_NOT_SAFE(dig_port->tc_phy_fia_idx);
 
 	intel_uncore_write(uncore,
 			   PORT_TX_DFLEXDPCSSS(dig_port->tc_phy_fia), val);
 
-	if (enable && wait_for(!icl_tc_phy_status_complete(dig_port), 10))
+	if (!take && wait_for(!icl_tc_phy_status_complete(dig_port), 10))
 		drm_dbg_kms(&i915->drm,
 			    "Port %s: PHY complete clear timed out\n",
 			    dig_port->tc_port_name);
@@ -288,7 +288,7 @@ static bool icl_tc_phy_set_safe_mode(struct intel_digital_port *dig_port,
 	return true;
 }
 
-static bool icl_tc_phy_is_in_safe_mode(struct intel_digital_port *dig_port)
+static bool icl_tc_phy_is_owned(struct intel_digital_port *dig_port)
 {
 	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
 	struct intel_uncore *uncore = &i915->uncore;
@@ -303,7 +303,7 @@ static bool icl_tc_phy_is_in_safe_mode(struct intel_digital_port *dig_port)
 		return true;
 	}
 
-	return !(val & DP_PHY_MODE_STATUS_NOT_SAFE(dig_port->tc_phy_fia_idx));
+	return val & DP_PHY_MODE_STATUS_NOT_SAFE(dig_port->tc_phy_fia_idx);
 }
 
 /*
@@ -329,7 +329,7 @@ static void icl_tc_phy_connect(struct intel_digital_port *dig_port,
 		goto out_set_tbt_alt_mode;
 	}
 
-	if (!icl_tc_phy_set_safe_mode(dig_port, false) &&
+	if (!icl_tc_phy_take_ownership(dig_port, true) &&
 	    !drm_WARN_ON(&i915->drm, dig_port->tc_legacy_port))
 		goto out_set_tbt_alt_mode;
 
@@ -348,7 +348,7 @@ static void icl_tc_phy_connect(struct intel_digital_port *dig_port,
 	if (!(tc_port_live_status_mask(dig_port) & BIT(TC_PORT_DP_ALT))) {
 		drm_dbg_kms(&i915->drm, "Port %s: PHY sudden disconnect\n",
 			    dig_port->tc_port_name);
-		goto out_set_safe_mode;
+		goto out_release_phy;
 	}
 
 	if (max_lanes < required_lanes) {
@@ -356,15 +356,15 @@ static void icl_tc_phy_connect(struct intel_digital_port *dig_port,
 			    "Port %s: PHY max lanes %d < required lanes %d\n",
 			    dig_port->tc_port_name,
 			    max_lanes, required_lanes);
-		goto out_set_safe_mode;
+		goto out_release_phy;
 	}
 
 	dig_port->tc_mode = TC_PORT_DP_ALT;
 
 	return;
 
-out_set_safe_mode:
-	icl_tc_phy_set_safe_mode(dig_port, true);
+out_release_phy:
+	icl_tc_phy_take_ownership(dig_port, false);
 out_set_tbt_alt_mode:
 	dig_port->tc_mode = TC_PORT_TBT_ALT;
 }
@@ -380,7 +380,7 @@ static void icl_tc_phy_disconnect(struct intel_digital_port *dig_port)
 		/* Nothing to do, we never disconnect from legacy mode */
 		break;
 	case TC_PORT_DP_ALT:
-		icl_tc_phy_set_safe_mode(dig_port, true);
+		icl_tc_phy_take_ownership(dig_port, false);
 		dig_port->tc_mode = TC_PORT_TBT_ALT;
 		break;
 	case TC_PORT_TBT_ALT:
@@ -401,8 +401,8 @@ static bool icl_tc_phy_is_connected(struct intel_digital_port *dig_port)
 		return dig_port->tc_mode == TC_PORT_TBT_ALT;
 	}
 
-	if (icl_tc_phy_is_in_safe_mode(dig_port)) {
-		drm_dbg_kms(&i915->drm, "Port %s: PHY still in safe mode\n",
+	if (!icl_tc_phy_is_owned(dig_port)) {
+		drm_dbg_kms(&i915->drm, "Port %s: PHY not owned\n",
 			    dig_port->tc_port_name);
 
 		return false;
@@ -417,10 +417,9 @@ intel_tc_port_get_current_mode(struct intel_digital_port *dig_port)
 {
 	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
 	u32 live_status_mask = tc_port_live_status_mask(dig_port);
-	bool in_safe_mode = icl_tc_phy_is_in_safe_mode(dig_port);
 	enum tc_port_mode mode;
 
-	if (in_safe_mode ||
+	if (!icl_tc_phy_is_owned(dig_port) ||
 	    drm_WARN_ON(&i915->drm, !icl_tc_phy_status_complete(dig_port)))
 		return TC_PORT_TBT_ALT;