[PATCH iwl-next v1 3/4] ice: dpll: Rework U.FL muxed pin (SMA) control

[Sergey Temerkhanov <sergey.temerkhanov@intel.com>]

Rework multiplexed pin control to match the state change listed in
the design requirements.

Signed-off-by: Sergey Temerkhanov <sergey.temerkhanov@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Przemyslaw Korba <przemyslaw.korba@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_dpll.c | 35 ++++++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_dpll.c b/drivers/net/ethernet/intel/ice/ice_dpll.c
index 54958e17713b..cb14621b3aef 100644
--- a/drivers/net/ethernet/intel/ice/ice_dpll.c
+++ b/drivers/net/ethernet/intel/ice/ice_dpll.c
@@ -1381,12 +1381,39 @@ ice_dpll_ufl_pin_state_set(const struct dpll_pin *pin, void *pin_priv,
 	if (ret)
 		goto unlock;
 
-	if (enable)
+	if (enable) {
 		ret = ice_dpll_pin_enable(hw, target, d->dpll_idx, type, extack);
-	else
+		if (!ret)
+			ret = ice_dpll_pin_state_update(pf, target, type, extack);
+		if (!ret && p->muxed->active) {
+			struct ice_dpll_pin *peer = p->muxed;
+			struct ice_dpll_pin *peer_target;
+			enum ice_dpll_pin_type peer_type;
+			int peer_ret;
+
+			if (peer->direction == DPLL_PIN_DIRECTION_OUTPUT) {
+				peer_target = peer->output;
+				peer_type = ICE_DPLL_PIN_TYPE_OUTPUT;
+			} else {
+				peer_target = peer->input;
+				peer_type = ICE_DPLL_PIN_TYPE_INPUT;
+			}
+			peer_ret = ice_dpll_pin_enable(&pf->hw, peer_target,
+						       pf->dplls.eec.dpll_idx,
+						       peer_type, NULL);
+			if (!peer_ret)
+				peer_ret = ice_dpll_pin_state_update(pf, peer_target,
+							     peer_type, NULL);
+			if (peer_ret)
+				dev_warn(ice_pf_to_dev(pf),
+					 "Failed to sync peer pin %u after enabling U.FL pin %u, err %d\n",
+					 peer_target->idx, target->idx, peer_ret);
+		}
+	} else {
 		ret = ice_dpll_pin_disable(hw, target, type, extack);
-	if (!ret)
-		ret = ice_dpll_pin_state_update(pf, target, type, extack);
+		if (!ret)
+			ret = ice_dpll_pin_state_update(pf, target, type, extack);
+	}
 
 unlock:
 	mutex_unlock(&pf->dplls.lock);
-- 
2.53.0