@@ -433,23 +433,28 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub)
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret) {
dev_err(dpsub->dev, "failed to attach bridge to encoder\n");
- return ret;
+ goto err_encoder;
}
/* Create the connector for the chain of bridges. */
connector = drm_bridge_connector_init(&dpsub->drm->dev, encoder);
if (IS_ERR(connector)) {
dev_err(dpsub->dev, "failed to created connector\n");
- return PTR_ERR(connector);
+ ret = PTR_ERR(connector);
+ goto err_encoder;
}
ret = drm_connector_attach_encoder(connector, encoder);
if (ret < 0) {
dev_err(dpsub->dev, "failed to attach connector to encoder\n");
- return ret;
+ goto err_encoder;
}
return 0;
+
+err_encoder:
+ drm_encoder_cleanup(encoder);
+ return ret;
}
static void zynqmp_dpsub_drm_release(struct drm_device *drm, void *res)
@@ -529,5 +534,6 @@ void zynqmp_dpsub_drm_cleanup(struct zynqmp_dpsub *dpsub)
drm_dev_unregister(drm);
drm_atomic_helper_shutdown(drm);
+ drm_encoder_cleanup(&dpsub->drm->encoder);
drm_kms_helper_poll_fini(drm);
}
drm_encoder_cleanup is responsible for calling drm_bridge_detach for each bridge attached to the encoder. zynqmp_dp_bridge_detach is in turn responsible for unregistering the AUX bus. However, we never ended up calling drm_encoder_cleanup in the remove or error paths, so the AUX bus would stick around after the rest of the driver had been removed. I don't really understand why drm_mode_config_cleanup doesn't call drm_encoder_cleanup for us. It will call destroy (which for simple_encoder is drm_encoder_cleanup) on encoders in the mode_config's encoder_list. Should drm_encoder_cleanup get called before or after drm_atomic_helper_shutdown? Fixes: 2dfd045c8435 ("drm: xlnx: zynqmp_dpsub: Register AUX bus at bridge attach time") Signed-off-by: Sean Anderson <sean.anderson@linux.dev> --- Changes in v5: - New drivers/gpu/drm/xlnx/zynqmp_kms.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)