[PATCH] drm/bridge: analogix_dp: use devm_phy_optional_get() for the DP PHY

[PATCH] drm/bridge: analogix_dp: use devm_phy_optional_get() for the DP PHY

[Jun Yan]

The DP PHY is optional: the Rockchip RK3399 eDP controller (used as the
internal eDP port) has no separate PHY device and relies on its built-in
PHY, which is programmed directly through the GRF registers, so its DT
node carries no "phys"/"phy-names" property.

Requesting the PHY with devm_phy_get() therefore returns -ENODEV (or
-ENOSYS when CONFIG_GENERIC_PHY is disabled) and the driver logs a
misleading "no DP phy configured" error at probe time before falling back
to a NULL phy.

Use devm_phy_optional_get() instead, which returns NULL when the PHY is
absent and otherwise behaves identically, and drop the manual -ENODEV/
-ENOSYS handling. This also removes the spurious error message.

Assisted-by: Claude:deepseek-v4-flash
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
---
 .../gpu/drm/bridge/analogix/analogix_dp_core.c | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 18e76d1e78e1..28eb668d3e3f 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1427,21 +1427,9 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
 	if (ret)
 		return ERR_PTR(ret);
 
-	dp->phy = devm_phy_get(dp->dev, "dp");
-	if (IS_ERR(dp->phy)) {
-		dev_err(dp->dev, "no DP phy configured\n");
-		ret = PTR_ERR(dp->phy);
-		if (ret) {
-			/*
-			 * phy itself is not enabled, so we can move forward
-			 * assigning NULL to phy pointer.
-			 */
-			if (ret == -ENOSYS || ret == -ENODEV)
-				dp->phy = NULL;
-			else
-				return ERR_PTR(ret);
-		}
-	}
+	dp->phy = devm_phy_optional_get(dp->dev, "dp");
+	if (IS_ERR(dp->phy))
+		return ERR_CAST(dp->phy);
 
 	dp->clock = devm_clk_get(&pdev->dev, "dp");
 	if (IS_ERR(dp->clock)) {
-- 
2.55.0


_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip