drm/bridge: lt8912b: return EPROBE_DEFER if bridge is not found

commit 1a70ca89d59c7c8af006d29b965a95ede0abb0da upstream.

Returns EPROBE_DEFER when of_drm_find_bridge() fails, this is consistent
with what all the other DRM bridge drivers are doing and this is
required since the bridge might not be there when the driver is probed
and this should not be a fatal failure.

Cc: <stable@vger.kernel.org>
Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Matheus Castello <matheus.castello@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230322143821.109744-1-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 82169b6bfca1035ef0a134361157fcf189416e28..96808190250d43f872016c2b1c85e09b343e358b 100644 (file)
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -670,8 +670,8 @@ static int lt8912_parse_dt(struct lt8912 *lt)
 
        lt->hdmi_port = of_drm_find_bridge(port_node);
        if (!lt->hdmi_port) {
-               dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__);
-               ret = -ENODEV;
+               ret = -EPROBE_DEFER;
+               dev_err_probe(lt->dev, ret, "%s: Failed to get hdmi port\n", __func__);
                goto err_free_host_node;
        }