[PATCH v3] phy/qcom-qmp-combo: propagate correct return value at phy_power_on()

[Kuogee Hsieh]

Currently qmp_combo_dp_power_on() always return 0 in regardless of
return value of cfg->configure_dp_phy(). This patch propagate
return value of cfg->configure_dp_phy() all the way back to caller.

Changes in V3:
-- add v2 changes log

Changes in V2:
-- add Fixes tag
-- add dev_err() to qmp_v3_configure_dp_phy()
-- add dev_err() to qmp_v4_configure_dp_phy()

Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy")
Signed-off-by: Kuogee Hsieh <quic_khs...@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhin...@quicinc.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c 
b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 36632fa..513d99d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -2343,8 +2343,10 @@ static int qmp_v3_configure_dp_phy(struct qmp_combo *qmp)
        writel(0x05, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_TX2_TX3_LANE_CTL);
 
        ret = qmp_combo_configure_dp_clocks(qmp);
-       if (ret)
+       if (ret) {
+               dev_err(qmp->dev, "dp phy configure failed, err=%d\n", ret);
                return ret;
+       }
 
        writel(0x04, qmp->dp_dp_phy + QSERDES_DP_PHY_AUX_CFG2);
        writel(0x01, qmp->dp_dp_phy + QSERDES_DP_PHY_CFG);
@@ -2519,8 +2521,10 @@ static int qmp_v4_configure_dp_phy(struct qmp_combo *qmp)
        int ret;
 
        ret = qmp_v456_configure_dp_phy(qmp);
-       if (ret < 0)
+       if (ret < 0) {
+               dev_err(qmp->dev, "dp phy configure failed, err=%d\n", ret);
                return ret;
+       }
 
        /*
         * At least for 7nm DP PHY this has to be done after enabling link
@@ -2754,6 +2758,7 @@ static int qmp_combo_dp_power_on(struct phy *phy)
        const struct qmp_phy_cfg *cfg = qmp->cfg;
        void __iomem *tx = qmp->dp_tx;
        void __iomem *tx2 = qmp->dp_tx2;
+       int ret;
 
        mutex_lock(&qmp->phy_mutex);
 
@@ -2766,11 +2771,11 @@ static int qmp_combo_dp_power_on(struct phy *phy)
        cfg->configure_dp_tx(qmp);
 
        /* Configure link rate, swing, etc. */
-       cfg->configure_dp_phy(qmp);
+       ret = cfg->configure_dp_phy(qmp);
 
        mutex_unlock(&qmp->phy_mutex);
 
-       return 0;
+       return ret;
 }
 
 static int qmp_combo_dp_power_off(struct phy *phy)
-- 
2.7.4