On Tue, 2021-08-17 at 23:51 +0200, Hans de Goede wrote:
> Give connector sysfs devices there own device_type, this allows us to
> check if a device passed to functions dealing with generic devices is
> a drm_connector or not.
>
> A check like this is necessary in the drm_connector_acpi_bus_match()
> function added in the next patch in this series.
>
> Tested-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_sysfs.c | 50 +++++++++++++++++++++++++++----------
> 1 file changed, 37 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
> index 968a9560b4aa..f9d92bbb1f98 100644
> --- a/drivers/gpu/drm/drm_sysfs.c
> +++ b/drivers/gpu/drm/drm_sysfs.c
> @@ -50,6 +50,10 @@ static struct device_type drm_sysfs_device_minor = {
> .name = "drm_minor"
> };
>
> +static struct device_type drm_sysfs_device_connector = {
> + .name = "drm_connector",
> +};
> +
> struct class *drm_class;
>
> static char *drm_devnode(struct device *dev, umode_t *mode)
> @@ -102,6 +106,11 @@ void drm_sysfs_destroy(void)
> drm_class = NULL;
> }
>
> +static void drm_sysfs_release(struct device *dev)
> +{
> + kfree(dev);
> +}
> +
> /*
> * Connector properties
> */
> @@ -273,27 +282,47 @@ static const struct attribute_group
> *connector_dev_groups[] = {
> int drm_sysfs_connector_add(struct drm_connector *connector)
> {
> struct drm_device *dev = connector->dev;
> + struct device *kdev;
> + int r;
>
> if (connector->kdev)
> return 0;
>
> - connector->kdev =
> - device_create_with_groups(drm_class, dev->primary->kdev, 0,
> - connector, connector_dev_groups,
> - "card%d-%s", dev->primary->index,
> - connector->name);
> + kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
> + if (!kdev)
> + return -ENOMEM;
> +
> + device_initialize(kdev);
> + kdev->class = drm_class;
> + kdev->type = &drm_sysfs_device_connector;
> + kdev->parent = dev->primary->kdev;
> + kdev->groups = connector_dev_groups;
> + kdev->release = drm_sysfs_release;
> + dev_set_drvdata(kdev, connector);
> +
> + r = dev_set_name(kdev, "card%d-%s", dev->primary->index, connector-
> >name);
> + if (r)
> + goto err_free;
> +
> DRM_DEBUG("adding \"%s\" to sysfs\n",
> connector->name);
>
> - if (IS_ERR(connector->kdev)) {
> - DRM_ERROR("failed to register connector device: %ld\n",
> PTR_ERR(connector->kdev));
> - return PTR_ERR(connector->kdev);
> + r = device_add(kdev);
> + if (r) {
> + DRM_ERROR("failed to register connector device: %d\n", r);
> + goto err_free;
Should probably be using drm_err() here since we have access to struct
drm_device *
> }
>
> + connector->kdev = kdev;
> +
> if (connector->ddc)
> return sysfs_create_link(&connector->kdev->kobj,
> &connector->ddc->dev.kobj, "ddc");
> return 0;
> +
> +err_free:
> + put_device(kdev);
> + return r;
> }
>
> void drm_sysfs_connector_remove(struct drm_connector *connector)
> @@ -374,11 +403,6 @@ void drm_sysfs_connector_status_event(struct
> drm_connector *connector,
> }
> EXPORT_SYMBOL(drm_sysfs_connector_status_event);
>
> -static void drm_sysfs_release(struct device *dev)
> -{
> - kfree(dev);
> -}
> -
> struct device *drm_sysfs_minor_alloc(struct drm_minor *minor)
> {
> const char *minor_str;
--
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat
