This reverts commit 39d5b6a64ace77d0c11c398d272218df5f939abb.

This patch was causing build errors by using an unexported
function from the device core, which Greg questions the
saneness in exporting.

Link: https://lore.kernel.org/lkml/CACRpkdaGzXD6HbiX7mVUNJAJtMEPG00Pp6+nJ1P0JrfJ-ArMvQ@mail.gmail.com/T/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpu/drm/bridge/panel.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index 5e8980023407..e48823a4f1ed 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -23,7 +23,6 @@ struct panel_bridge {
 	struct drm_panel *panel;
 	struct device_link *link;
 	u32 connector_type;
-	bool is_independent;
 };
 
 static inline struct panel_bridge *
@@ -68,17 +67,12 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
 	struct drm_device *drm_dev = bridge->dev;
 	int ret;
 
-	panel_bridge->is_independent = !device_is_dependent(drm_dev->dev,
-							    panel->dev);
-
-	if (panel_bridge->is_independent) {
-		panel_bridge->link = device_link_add(drm_dev->dev, panel->dev,
-						     DL_FLAG_STATELESS);
-		if (!panel_bridge->link) {
-			DRM_ERROR("Failed to add device link between %s and %s\n",
-				  dev_name(drm_dev->dev), dev_name(panel->dev));
-			return -EINVAL;
-		}
+	panel_bridge->link = device_link_add(drm_dev->dev, panel->dev,
+					     DL_FLAG_STATELESS);
+	if (!panel_bridge->link) {
+		DRM_ERROR("Failed to add device link between %s and %s\n",
+			  dev_name(drm_dev->dev), dev_name(panel->dev));
+		return -EINVAL;
 	}
 
 	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
@@ -86,8 +80,7 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
 
 	if (!bridge->encoder) {
 		DRM_ERROR("Missing encoder\n");
-		if (panel_bridge->is_independent)
-			device_link_del(panel_bridge->link);
+		device_link_del(panel_bridge->link);
 		return -ENODEV;
 	}
 
@@ -99,8 +92,7 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
 				 panel_bridge->connector_type);
 	if (ret) {
 		DRM_ERROR("Failed to initialize connector\n");
-		if (panel_bridge->is_independent)
-			device_link_del(panel_bridge->link);
+		device_link_del(panel_bridge->link);
 		return ret;
 	}
 
@@ -123,8 +115,7 @@ static void panel_bridge_detach(struct drm_bridge *bridge)
 	struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
 	struct drm_connector *connector = &panel_bridge->connector;
 
-	if (panel_bridge->is_independent)
-		device_link_del(panel_bridge->link);
+	device_link_del(panel_bridge->link);
 
 	/*
 	 * Cleanup the connector if we know it was initialized.

-- 
2.41.0

On 28/11/2023 00:10, Linus Walleij wrote:
> This reverts commit 39d5b6a64ace77d0c11c398d272218df5f939abb.
> 
> This patch was causing build errors by using an unexported
> function from the device core, which Greg questions the
> saneness in exporting.
> 
> Link: https://lore.kernel.org/lkml/CACRpkdaGzXD6HbiX7mVUNJAJtMEPG00Pp6+nJ1P0JrfJ-ArMvQ@mail.gmail.com/T/
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>   drivers/gpu/drm/bridge/panel.c | 27 +++++++++------------------
>   1 file changed, 9 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
> index 5e8980023407..e48823a4f1ed 100644
> --- a/drivers/gpu/drm/bridge/panel.c
> +++ b/drivers/gpu/drm/bridge/panel.c
> @@ -23,7 +23,6 @@ struct panel_bridge {
>   	struct drm_panel *panel;
>   	struct device_link *link;
>   	u32 connector_type;
> -	bool is_independent;
>   };
>   
>   static inline struct panel_bridge *
> @@ -68,17 +67,12 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
>   	struct drm_device *drm_dev = bridge->dev;
>   	int ret;
>   
> -	panel_bridge->is_independent = !device_is_dependent(drm_dev->dev,
> -							    panel->dev);
> -
> -	if (panel_bridge->is_independent) {
> -		panel_bridge->link = device_link_add(drm_dev->dev, panel->dev,
> -						     DL_FLAG_STATELESS);
> -		if (!panel_bridge->link) {
> -			DRM_ERROR("Failed to add device link between %s and %s\n",
> -				  dev_name(drm_dev->dev), dev_name(panel->dev));
> -			return -EINVAL;
> -		}
> +	panel_bridge->link = device_link_add(drm_dev->dev, panel->dev,
> +					     DL_FLAG_STATELESS);
> +	if (!panel_bridge->link) {
> +		DRM_ERROR("Failed to add device link between %s and %s\n",
> +			  dev_name(drm_dev->dev), dev_name(panel->dev));
> +		return -EINVAL;
>   	}
>   
>   	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
> @@ -86,8 +80,7 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
>   
>   	if (!bridge->encoder) {
>   		DRM_ERROR("Missing encoder\n");
> -		if (panel_bridge->is_independent)
> -			device_link_del(panel_bridge->link);
> +		device_link_del(panel_bridge->link);
>   		return -ENODEV;
>   	}
>   
> @@ -99,8 +92,7 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
>   				 panel_bridge->connector_type);
>   	if (ret) {
>   		DRM_ERROR("Failed to initialize connector\n");
> -		if (panel_bridge->is_independent)
> -			device_link_del(panel_bridge->link);
> +		device_link_del(panel_bridge->link);
>   		return ret;
>   	}
>   
> @@ -123,8 +115,7 @@ static void panel_bridge_detach(struct drm_bridge *bridge)
>   	struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
>   	struct drm_connector *connector = &panel_bridge->connector;
>   
> -	if (panel_bridge->is_independent)
> -		device_link_del(panel_bridge->link);
> +	device_link_del(panel_bridge->link);
>   
>   	/*
>   	 * Cleanup the connector if we know it was initialized.
> 

Acked-by: Neil Armstrong <neil.armstrong@linaro.org>