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The link will be created only if the firmware is able to describe the connection beween the two connectors. Signed-off-by: Won Chung --- drivers/gpu/drm/drm_sysfs.c | 42 +++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 430e00b16eec..8270b02e6783 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -11,12 +11,14 @@ */ #include +#include #include #include #include #include #include #include +#include #include #include @@ -95,6 +97,36 @@ static char *drm_devnode(struct device *dev, umode_t *mode) return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); } +static int typec_connector_bind(struct device *dev, + struct device *typec_connector, void *data) +{ + int ret; + + ret = sysfs_create_link(&dev->kobj, &typec_connector->kobj, + "typec_connector"); + if (ret) + return ret; + + ret = sysfs_create_link(&typec_connector->kobj, &dev->kobj, + "drm_connector"); + if (ret) + sysfs_remove_link(&dev->kobj, "typec_connector"); + + return ret; +} + +static void typec_connector_unbind(struct device *dev, + struct device *typec_connector, void *data) +{ + sysfs_remove_link(&typec_connector->kobj, "drm_connector"); + sysfs_remove_link(&dev->kobj, "typec_connector"); +} + +static const struct component_ops typec_connector_ops = { + .bind = typec_connector_bind, + .unbind = typec_connector_unbind, +}; + static CLASS_ATTR_STRING(version, S_IRUGO, "drm 1.1.0 20060810"); /** @@ -355,6 +387,13 @@ int drm_sysfs_connector_add(struct drm_connector *connector) if (connector->ddc) return sysfs_create_link(&connector->kdev->kobj, &connector->ddc->dev.kobj, "ddc"); + + if (dev_fwnode(kdev)) { + r = component_add(kdev, &typec_connector_ops); + if (r) + drm_err(dev, "failed to add component\n"); + } + return 0; err_free: @@ -367,6 +406,9 @@ void drm_sysfs_connector_remove(struct drm_connector *connector) if (!connector->kdev) return; + if (dev_fwnode(connector->kdev)) + component_del(connector->kdev, &typec_connector_ops); + if (connector->ddc) sysfs_remove_link(&connector->kdev->kobj, "ddc"); -- 2.37.2.789.g6183377224-goog