drm/i915/tc: Check TC mode instead of the VBT legacy flag

After the previous patch the TC mode in the connect/disconnect functions
is always in sync with the VBT legacy port flag, so for consistency with
the rest of the function check the TC mode instead of the VBT flag.
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230323142035.1432621-16-imre.deak@intel.com

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

@@ -449,7 +449,7 @@ static bool tc_phy_verify_legacy_or_dp_alt_mode(struct intel_tc_port *tc,
 	int max_lanes;
 
 	max_lanes = intel_tc_port_fia_max_lane_count(dig_port);
-	if (tc->legacy_port) {
+	if (tc->mode == TC_PORT_LEGACY) {
 		drm_WARN_ON(&i915->drm, max_lanes != 4);
 		return true;
 	}
@@ -485,16 +485,15 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc,
 	if (tc->mode == TC_PORT_TBT_ALT)
 		return true;
 
-	if (!tc_phy_is_ready(tc) &&
-	    !drm_WARN_ON(&i915->drm, tc->legacy_port)) {
-		drm_dbg_kms(&i915->drm, "Port %s: PHY not ready\n",
-			    tc->port_name);
+	if ((!tc_phy_is_ready(tc) ||
+	     !tc_phy_take_ownership(tc, true)) &&
+	    !drm_WARN_ON(&i915->drm, tc->mode == TC_PORT_LEGACY)) {
+		drm_dbg_kms(&i915->drm, "Port %s: can't take PHY ownership (ready %s)\n",
+			    tc->port_name,
+			    str_yes_no(tc_phy_is_ready(tc)));
 		return false;
 	}
 
-	if (!tc_phy_take_ownership(tc, true) &&
-	    !drm_WARN_ON(&i915->drm, tc->legacy_port))
-		return false;
 
 	if (!tc_phy_verify_legacy_or_dp_alt_mode(tc, required_lanes))
 		goto out_release_phy;