phy: qcom: qmp-combo: extract common function to setup clocks

Extact qmp_combo_configure_dp_clocks(), a common function to setup PHY
clocks depending on the selected link rate.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230621153317.1025914-8-dmitry.baryshkov@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

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

@@ -2074,18 +2074,12 @@ static bool qmp_combo_configure_dp_mode(struct qmp_combo *qmp)
 	return reverse;
 }
 
-static int qmp_v3_configure_dp_phy(struct qmp_combo *qmp)
+static int qmp_combo_configure_dp_clocks(struct qmp_combo *qmp)
 {
 	const struct phy_configure_opts_dp *dp_opts = &qmp->dp_opts;
-	const struct qmp_phy_cfg *cfg = qmp->cfg;
-	u32 phy_vco_div, status;
+	u32 phy_vco_div;
 	unsigned long pixel_freq;
 
-	qmp_combo_configure_dp_mode(qmp);
-
-	writel(0x05, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_TX0_TX1_LANE_CTL);
-	writel(0x05, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_TX2_TX3_LANE_CTL);
-
 	switch (dp_opts->link_rate) {
 	case 1620:
 		phy_vco_div = 0x1;
@@ -2107,11 +2101,29 @@ static int qmp_v3_configure_dp_phy(struct qmp_combo *qmp)
 		/* Other link rates aren't supported */
 		return -EINVAL;
 	}
-	writel(phy_vco_div, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_VCO_DIV);
+	writel(phy_vco_div, qmp->dp_dp_phy + QSERDES_V4_DP_PHY_VCO_DIV);
 
 	clk_set_rate(qmp->dp_link_hw.clk, dp_opts->link_rate * 100000);
 	clk_set_rate(qmp->dp_pixel_hw.clk, pixel_freq);
 
+	return 0;
+}
+
+static int qmp_v3_configure_dp_phy(struct qmp_combo *qmp)
+{
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	u32 status;
+	int ret;
+
+	qmp_combo_configure_dp_mode(qmp);
+
+	writel(0x05, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_TX0_TX1_LANE_CTL);
+	writel(0x05, qmp->dp_dp_phy + QSERDES_V3_DP_PHY_TX2_TX3_LANE_CTL);
+
+	ret = qmp_combo_configure_dp_clocks(qmp);
+	if (ret)
+		return ret;
+
 	writel(0x04, qmp->dp_dp_phy + QSERDES_DP_PHY_AUX_CFG2);
 	writel(0x01, qmp->dp_dp_phy + QSERDES_DP_PHY_CFG);
 	writel(0x05, qmp->dp_dp_phy + QSERDES_DP_PHY_CFG);
@@ -2210,10 +2222,9 @@ static void qmp_v4_configure_dp_tx(struct qmp_combo *qmp)
 
 static int qmp_v456_configure_dp_phy(struct qmp_combo *qmp)
 {
-	const struct phy_configure_opts_dp *dp_opts = &qmp->dp_opts;
 	const struct qmp_phy_cfg *cfg = qmp->cfg;
-	u32 phy_vco_div, status;
-	unsigned long pixel_freq;
+	u32 status;
+	int ret;
 
 	writel(0x0f, qmp->dp_dp_phy + QSERDES_V4_DP_PHY_CFG_1);
 
@@ -2225,31 +2236,9 @@ static int qmp_v456_configure_dp_phy(struct qmp_combo *qmp)
 	writel(0x05, qmp->dp_dp_phy + QSERDES_V4_DP_PHY_TX0_TX1_LANE_CTL);
 	writel(0x05, qmp->dp_dp_phy + QSERDES_V4_DP_PHY_TX2_TX3_LANE_CTL);
 
-	switch (dp_opts->link_rate) {
-	case 1620:
-		phy_vco_div = 0x1;
-		pixel_freq = 1620000000UL / 2;
-		break;
-	case 2700:
-		phy_vco_div = 0x1;
-		pixel_freq = 2700000000UL / 2;
-		break;
-	case 5400:
-		phy_vco_div = 0x2;
-		pixel_freq = 5400000000UL / 4;
-		break;
-	case 8100:
-		phy_vco_div = 0x0;
-		pixel_freq = 8100000000UL / 6;
-		break;
-	default:
-		/* Other link rates aren't supported */
-		return -EINVAL;
-	}
-	writel(phy_vco_div, qmp->dp_dp_phy + QSERDES_V4_DP_PHY_VCO_DIV);
-
-	clk_set_rate(qmp->dp_link_hw.clk, dp_opts->link_rate * 100000);
-	clk_set_rate(qmp->dp_pixel_hw.clk, pixel_freq);
+	ret = qmp_combo_configure_dp_clocks(qmp);
+	if (ret)
+		return ret;
 
 	writel(0x01, qmp->dp_dp_phy + QSERDES_DP_PHY_CFG);
 	writel(0x05, qmp->dp_dp_phy + QSERDES_DP_PHY_CFG);