To allows the userspace to identify the device once it is enabled, create
a file to fetch it.
This file can only be read once the device is enabled, and will return the
device name, which can later be used to use it.
Signed-off-by: Louis Chauvet <louis.chauvet@xxxxxxxxxxx>
---
drivers/gpu/drm/vkms/vkms_configfs.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vkms_configfs.c
index eeb0c1e1b225f2a1a35ac6deb9457b90ba6542e5..d0bc6adfdae85b82ca043d318f84fca70840526c 100644
--- a/drivers/gpu/drm/vkms/vkms_configfs.c
+++ b/drivers/gpu/drm/vkms/vkms_configfs.c
@@ -927,10 +927,26 @@ static ssize_t device_enable_store(struct config_item *item,
return (ssize_t)count;
}
+static ssize_t device_device_name_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_device *configfs_device = config_item_to_vkms_configfs_device(item);
+
+ scoped_guard(mutex, &configfs_device->lock)
+ {
+ if (configfs_device->enabled)
+ return sprintf(page, "%s\n",
+ dev_name(configfs_device->vkms_config->dev->drm.dev));
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
CONFIGFS_ATTR(device_, enable);
+CONFIGFS_ATTR_RO(device_, device_name);
static struct configfs_attribute *device_attrs[] = {
&device_attr_enable,
+ &device_attr_device_name,
NULL,
};
--
2.47.1
