[PATCH v2 3/5] drm/bridge: ps8640: Return an error for incorrect attach flags

[Enric Balletbo i Serra]

Bridge drivers that implement the new model only shall return an error
from their attach() handler when the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag
is not set. So make sure we return an error because only the new
drm_bridge model is supported.

Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
---

Changes in v2: None

 drivers/gpu/drm/bridge/parade-ps8640.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 13755d278db6..ce3e8b2da8c9 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -200,6 +200,10 @@ static int ps8640_bridge_attach(struct drm_bridge *bridge,
 						   .channel = 0,
 						   .node = NULL,
 						 };
+
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+		return -EINVAL;
+
 	/* port at 0 is ps8640 dsi input port */
 	in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!in_ep)
-- 
2.28.0