Which make it possible to use this driver on non-DT based systems, meanwhile, made no functional changes for DT based systems. Signed-off-by: Sui Jingfeng <sui.jingfeng@xxxxxxxxx> --- drivers/gpu/drm/bridge/simple-bridge.c | 51 ++++++++++++++++++++++---- 1 file changed, 44 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c index 595f672745b9..cfea5a67cc5b 100644 --- a/drivers/gpu/drm/bridge/simple-bridge.c +++ b/drivers/gpu/drm/bridge/simple-bridge.c @@ -184,6 +184,39 @@ static const void *simple_bridge_get_match_data(const struct device *dev) return NULL; } +static int simple_bridge_get_next_bridge_by_fwnode(struct device *dev, + struct drm_bridge **next_bridge) +{ + struct drm_bridge *bridge; + struct fwnode_handle *ep; + struct fwnode_handle *remote; + + ep = fwnode_graph_get_endpoint_by_id(dev->fwnode, 1, 0, 0); + if (!ep) { + dev_err(dev, "The endpoint is unconnected\n"); + return -EINVAL; + } + + remote = fwnode_graph_get_remote_port_parent(ep); + fwnode_handle_put(ep); + if (!remote) { + dev_err(dev, "No valid remote node\n"); + return -ENODEV; + } + + bridge = drm_bridge_find_by_fwnode(remote); + fwnode_handle_put(remote); + + if (!bridge) { + dev_warn(dev, "Next bridge not found, deferring probe\n"); + return -EPROBE_DEFER; + } + + *next_bridge = bridge; + + return 0; +} + static int simple_bridge_probe(struct platform_device *pdev) { struct simple_bridge *sbridge; @@ -199,14 +232,17 @@ static int simple_bridge_probe(struct platform_device *pdev) else sbridge->info = simple_bridge_get_match_data(&pdev->dev); - /* Get the next bridge in the pipeline. */ - remote = of_graph_get_remote_node(pdev->dev.of_node, 1, -1); - if (!remote) - return -EINVAL; - - sbridge->next_bridge = of_drm_find_bridge(remote); - of_node_put(remote); + if (pdev->dev.of_node) { + /* Get the next bridge in the pipeline. */ + remote = of_graph_get_remote_node(pdev->dev.of_node, 1, -1); + if (!remote) + return -EINVAL; + sbridge->next_bridge = of_drm_find_bridge(remote); + of_node_put(remote); + } else { + simple_bridge_get_next_bridge_by_fwnode(&pdev->dev, &sbridge->next_bridge); + } if (!sbridge->next_bridge) { dev_dbg(&pdev->dev, "Next bridge not found, deferring probe\n"); return -EPROBE_DEFER; @@ -231,6 +267,7 @@ static int simple_bridge_probe(struct platform_device *pdev) /* Register the bridge. */ sbridge->bridge.funcs = &simple_bridge_bridge_funcs; sbridge->bridge.of_node = pdev->dev.of_node; + sbridge->bridge.fwnode = pdev->dev.fwnode; sbridge->bridge.timings = sbridge->info->timings; drm_bridge_add(&sbridge->bridge); -- 2.25.1