phy: qcom-qmp-combo: clean up serdes initialisation

Clean up serdes initialisation somewhat by making the current helper a
dedicated helper for the DP part of the PHY.

Note that no error is currently returned for non-supported link rates.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221114110621.4639-12-johan+linaro@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp-combo.c

@@ -1313,7 +1313,7 @@ static void qmp_combo_configure(void __iomem *base,
 	qmp_combo_configure_lane(base, tbl, num, 0xff);
 }
 
-static int qmp_combo_serdes_init(struct qmp_phy *qphy)
+static int qmp_combo_dp_serdes_init(struct qmp_phy *qphy)
 {
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
 	void __iomem *serdes = qphy->serdes;
@@ -1323,28 +1323,26 @@ static int qmp_combo_serdes_init(struct qmp_phy *qphy)
 
 	qmp_combo_configure(serdes, serdes_tbl, serdes_tbl_num);
 
-	if (cfg->type == PHY_TYPE_DP) {
-		switch (dp_opts->link_rate) {
-		case 1620:
-			qmp_combo_configure(serdes, cfg->serdes_tbl_rbr,
-					       cfg->serdes_tbl_rbr_num);
-			break;
-		case 2700:
-			qmp_combo_configure(serdes, cfg->serdes_tbl_hbr,
-					       cfg->serdes_tbl_hbr_num);
-			break;
-		case 5400:
-			qmp_combo_configure(serdes, cfg->serdes_tbl_hbr2,
-					       cfg->serdes_tbl_hbr2_num);
-			break;
-		case 8100:
-			qmp_combo_configure(serdes, cfg->serdes_tbl_hbr3,
-					       cfg->serdes_tbl_hbr3_num);
-			break;
-		default:
-			/* Other link rates aren't supported */
-			return -EINVAL;
-		}
+	switch (dp_opts->link_rate) {
+	case 1620:
+		qmp_combo_configure(serdes, cfg->serdes_tbl_rbr,
+				cfg->serdes_tbl_rbr_num);
+		break;
+	case 2700:
+		qmp_combo_configure(serdes, cfg->serdes_tbl_hbr,
+				cfg->serdes_tbl_hbr_num);
+		break;
+	case 5400:
+		qmp_combo_configure(serdes, cfg->serdes_tbl_hbr2,
+				cfg->serdes_tbl_hbr2_num);
+		break;
+	case 8100:
+		qmp_combo_configure(serdes, cfg->serdes_tbl_hbr3,
+				cfg->serdes_tbl_hbr3_num);
+		break;
+	default:
+		/* Other link rates aren't supported */
+		return -EINVAL;
 	}
 
 	return 0;
@@ -1994,7 +1992,7 @@ static int qmp_combo_dp_power_on(struct phy *phy)
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
 	void __iomem *tx = qphy->tx;
 
-	qmp_combo_serdes_init(qphy);
+	qmp_combo_dp_serdes_init(qphy);
 
 	qmp_combo_configure_lane(tx, cfg->tx_tbl, cfg->tx_tbl_num, 1);
 
@@ -2025,6 +2023,7 @@ static int qmp_combo_usb_power_on(struct phy *phy)
 	struct qmp_phy *qphy = phy_get_drvdata(phy);
 	struct qcom_qmp *qmp = qphy->qmp;
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
+	void __iomem *serdes = qphy->serdes;
 	void __iomem *tx = qphy->tx;
 	void __iomem *rx = qphy->rx;
 	void __iomem *pcs = qphy->pcs;
@@ -2032,7 +2031,7 @@ static int qmp_combo_usb_power_on(struct phy *phy)
 	unsigned int val;
 	int ret;
 
-	qmp_combo_serdes_init(qphy);
+	qmp_combo_configure(serdes, cfg->serdes_tbl, cfg->serdes_tbl_num);
 
 	ret = clk_prepare_enable(qphy->pipe_clk);
 	if (ret) {