Merge remote-tracking branch 'drm-misc/drm-misc-next' into drm-tip

1 files changed, 26 insertions, 3 deletions

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 818704bf5e86..54723f068884 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -102,6 +102,7 @@ struct ps8640 {
 	struct regulator_bulk_data supplies[2];
 	struct gpio_desc *gpio_reset;
 	struct gpio_desc *gpio_powerdown;
+	struct device_link *link;
 	bool pre_enabled;
 };
 
@@ -456,14 +457,36 @@ static int ps8640_bridge_attach(struct drm_bridge *bridge,
 		return ret;
 	}
 
+	ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS);
+	if (!ps_bridge->link) {
+		dev_err(dev, "failed to create device link");
+		ret = -EINVAL;
+		goto err_devlink;
+	}
+
 	/* Attach the panel-bridge to the dsi bridge */
-	return drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,
-				 &ps_bridge->bridge, flags);
+	ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,
+				&ps_bridge->bridge, flags);
+	if (ret)
+		goto err_bridge_attach;
+
+	return 0;
+
+err_bridge_attach:
+	device_link_del(ps_bridge->link);
+err_devlink:
+	drm_dp_aux_unregister(&ps_bridge->aux);
+
+	return ret;
 }
 
 static void ps8640_bridge_detach(struct drm_bridge *bridge)
 {
-	drm_dp_aux_unregister(&bridge_to_ps8640(bridge)->aux);
+	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+
+	drm_dp_aux_unregister(&ps_bridge->aux);
+	if (ps_bridge->link)
+		device_link_del(ps_bridge->link);
 }
 
 static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge,