[Intel-gfx] [PATCH 08/14] drm/i915/tc: Fix TC mode for a legacy port if the PHY is not ready

[Imre Deak]

A legacy TC port can't be switched to TBT mode, even if the PHY
initialization wasn't ready yet for some reason, so prevent this.

This shouldn't normally happen as the driver waits for the IOM/TCSS
PHY initialization during driver loading and system resume.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/display/intel_tc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index e39c8a870df06..f66129494cc40 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -482,7 +482,8 @@ static void icl_tc_phy_connect(struct intel_digital_port *dig_port,
 	u32 live_status_mask;
 	int max_lanes;
 
-	if (!tc_phy_status_complete(dig_port)) {
+	if (!tc_phy_status_complete(dig_port) &&
+	    !drm_WARN_ON(&i915->drm, dig_port->tc_legacy_port)) {
 		drm_dbg_kms(&i915->drm, "Port %s: PHY not ready\n",
 			    dig_port->tc_port_name);
 		goto out_set_tbt_alt_mode;
-- 
2.37.1