phy: qcom: Program SSC only if supported by sink

Some legacy eDP sinks may not support SSC. The support for SSC is indicated through an opts flag from the controller driver. This change will enable SSC only if the sink supports it. Signed-off-by: Sankeerth Billakanti <[email protected]> Reviewed-by: Stephen Boyd <[email protected]> Signed-off-by: Douglas Anderson <[email protected]> Link: https://lore.kernel.org/r/20220207161612.REPOST.v1.3.Ie81d594ec2327dae6410db359cc492484bab171f@changeid Signed-off-by: Vinod Koul <[email protected]>
chewitt · Feb 8, 2022 · 4a4c3cc · 4a4c3cc
1 parent cc62512
commit 4a4c3cc
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
@@ -335,9 +335,11 @@ static int qcom_edp_phy_power_on(struct phy *phy)
 	writel(0x00, edp->tx0 + TXn_LANE_MODE_1);
 	writel(0x00, edp->tx1 + TXn_LANE_MODE_1);
 
-	ret = qcom_edp_configure_ssc(edp);
-	if (ret)
-		return ret;
+	if (edp->dp_opts.ssc) {
+		ret = qcom_edp_configure_ssc(edp);
+		if (ret)
+			return ret;
+	}
 
 	ret = qcom_edp_configure_pll(edp);
 	if (ret)