diff options
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 132c81333491..73510d0cc60a 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -823,10 +823,64 @@ static int add_components(struct device *dev, struct component_match **matchptr, return 0; } +/* + * Identify what components need to be added by parsing what remote-endpoints + * our MDP output ports are connected to. In the case of LVDS on MDP4, there + * is no external component that we need to add since LVDS is within MDP4 + * itself. + */ +static int add_components_mdp(struct device *mdp_dev, + struct component_match **matchptr) +{ + struct device_node *np = mdp_dev->of_node; + struct device_node *ep_node; + + for_each_endpoint_of_node(np, ep_node) { + struct device_node *intf; + struct of_endpoint ep; + int ret; + + ret = of_graph_parse_endpoint(ep_node, &ep); + if (ret) { + dev_err(mdp_dev, "unable to parse port endpoint\n"); + of_node_put(ep_node); + return ret; + } + + /* + * The LCDC/LVDS port on MDP4 is a speacial case where the + * remote-endpoint isn't a component that we need to add + */ + if (of_device_is_compatible(np, "qcom,mdp4") && + ep.port == 0) { + of_node_put(ep_node); + continue; + } + + /* + * It's okay if some of the ports don't have a remote endpoint + * specified. It just means that the port isn't connected to + * any external interface. + */ + intf = of_graph_get_remote_port_parent(ep_node); + if (!intf) { + of_node_put(ep_node); + continue; + } + + component_match_add(mdp_dev, matchptr, compare_of, intf); + + of_node_put(intf); + of_node_put(ep_node); + } + + return 0; +} + static int add_display_components(struct device *dev, struct component_match **matchptr) { - return add_components(dev, matchptr, "connectors"); + return add_components_mdp(dev, matchptr); } static int add_gpu_components(struct device *dev, |