Commit b7d11305 authored by Stefan Agner's avatar Stefan Agner

drm/fsl-dcu: handle missing panel gracefully

If the device tree property fsl,panel is missing, drm_panel_attach
is called with a NULL pointer as first argument. Having a panel is
basically mandatory since RGB is the only supported connector.
Check if a panel node has been found, return -ENODEV and cleanup
otherwise.
Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
parent a109f66f
......@@ -171,14 +171,18 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
DRM_MODE_DPMS_OFF);
panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
if (panel_node) {
fsl_dev->connector.panel = of_drm_find_panel(panel_node);
if (!fsl_dev->connector.panel) {
ret = -EPROBE_DEFER;
goto err_sysfs;
}
of_node_put(panel_node);
if (!panel_node) {
dev_err(fsl_dev->dev, "fsl,panel property not found\n");
ret = -ENODEV;
goto err_sysfs;
}
fsl_dev->connector.panel = of_drm_find_panel(panel_node);
if (!fsl_dev->connector.panel) {
ret = -EPROBE_DEFER;
goto err_panel;
}
of_node_put(panel_node);
ret = drm_panel_attach(fsl_dev->connector.panel, connector);
if (ret) {
......@@ -188,6 +192,8 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
return 0;
err_panel:
of_node_put(panel_node);
err_sysfs:
drm_connector_unregister(connector);
err_cleanup:
......
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