drm: drm_device.h: update comments to kernel-doc style

Updated comment style to kernel-doc format in drm_device.h

In struct drm_device there are 12 struct members without doc:
- registered
- filelist_mutex
- filelist
- irq
- vbl_lock
- event_lock
- hose
- sigdata
- sigdata.context
- sigdata.lock
- agp_buffer_map
- agp_buffer_token

They all need proper documentation, a task left for someone
that knows their usage.

drm_device is not plugged into Documentation/gpu/drm-internals.rst
as this would create a new load of warnings.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190108192939.15255-2-sam@ravnborg.org

include/drm/drm_device.h

@@ -25,24 +25,48 @@ struct pci_dev;
 struct pci_controller;
 
 /**
- * DRM device structure. This structure represent a complete card that
+ * struct drm_device - DRM device structure
+ *
+ * This structure represent a complete card that
  * may contain multiple heads.
  */
 struct drm_device {
-	struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
-	int if_version;			/**< Highest interface version set */
-
-	/** \name Lifetime Management */
-	/*@{ */
-	struct kref ref;		/**< Object ref-count */
-	struct device *dev;		/**< Device structure of bus-device */
-	struct drm_driver *driver;	/**< DRM driver managing the device */
-	void *dev_private;		/**< DRM driver private data */
-	struct drm_minor *primary;		/**< Primary node */
-	struct drm_minor *render;		/**< Render node */
+	/**
+	 * @legacy_dev_list:
+	 *
+	 * List of devices per driver for stealth attach cleanup
+	 */
+	struct list_head legacy_dev_list;
+
+	/** @if_version: Highest interface version set */
+	int if_version;
+
+	/** @ref: Object ref-count */
+	struct kref ref;
+
+	/** @dev: Device structure of bus-device */
+	struct device *dev;
+
+	/** @driver: DRM driver managing the device */
+	struct drm_driver *driver;
+
+	/** @dev_private: DRM driver private data */
+	void *dev_private;
+
+	/** @primary: Primary node */
+	struct drm_minor *primary;
+
+	/** @render: Render node */
+	struct drm_minor *render;
+
 	bool registered;
 
-	/* currently active master for this device. Protected by master_mutex */
+	/**
+	 * @master:
+	 *
+	 * Currently active master for this device.
+	 * Protected by &master_mutex
+	 */
 	struct drm_master *master;
 
 	/**
@@ -63,23 +87,42 @@ struct drm_device {
 	 */
 	bool unplugged;
 
-	struct inode *anon_inode;		/**< inode for private address-space */
-	char *unique;				/**< unique name of the device */
-	/*@} */
+	/** @anon_inode: inode for private address-space */
+	struct inode *anon_inode;
 
-	/** \name Locks */
-	/*@{ */
-	struct mutex struct_mutex;	/**< For others */
-	struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
-	/*@} */
+	/** @unique: Unique name of the device */
+	char *unique;
 
-	/** \name Usage Counters */
-	/*@{ */
-	int open_count;			/**< Outstanding files open, protected by drm_global_mutex. */
-	spinlock_t buf_lock;		/**< For drm_device::buf_use and a few other things. */
-	int buf_use;			/**< Buffers in use -- cannot alloc */
-	atomic_t buf_alloc;		/**< Buffer allocation in progress */
-	/*@} */
+	/**
+	 * @struct_mutex:
+	 *
+	 * Lock for others (not &drm_minor.master and &drm_file.is_master)
+	 */
+	struct mutex struct_mutex;
+
+	/**
+	 * @master_mutex:
+	 *
+	 * Lock for &drm_minor.master and &drm_file.is_master
+	 */
+	struct mutex master_mutex;
+
+	/**
+	 * @open_count:
+	 *
+	 * Usage counter for outstanding files open,
+	 * protected by drm_global_mutex
+	 */
+	int open_count;
+
+	/** @buf_lock: Lock for &buf_use and a few other things. */
+	spinlock_t buf_lock;
+
+	/** @buf_use: Usage counter for buffers in use -- cannot alloc */
+	int buf_use;
+
+	/** @buf_alloc: Buffer allocation in progress */
+	atomic_t buf_alloc;
 
 	struct mutex filelist_mutex;
 	struct list_head filelist;
@@ -87,51 +130,64 @@ struct drm_device {
 	/**
 	 * @filelist_internal:
 	 *
-	 * List of open DRM files for in-kernel clients. Protected by @filelist_mutex.
+	 * List of open DRM files for in-kernel clients.
+	 * Protected by &filelist_mutex.
 	 */
 	struct list_head filelist_internal;
 
 	/**
 	 * @clientlist_mutex:
 	 *
-	 * Protects @clientlist access.
+	 * Protects &clientlist access.
 	 */
 	struct mutex clientlist_mutex;
 
 	/**
 	 * @clientlist:
 	 *
-	 * List of in-kernel clients. Protected by @clientlist_mutex.
+	 * List of in-kernel clients. Protected by &clientlist_mutex.
 	 */
 	struct list_head clientlist;
 
-	/** \name Memory management */
-	/*@{ */
-	struct list_head maplist;	/**< Linked list of regions */
-	struct drm_open_hash map_hash;	/**< User token hash table for maps */
+	/** @maplist: Memory management - linked list of regions */
+	struct list_head maplist;
 
-	/** \name Context handle management */
-	/*@{ */
-	struct list_head ctxlist;	/**< Linked list of context handles */
-	struct mutex ctxlist_mutex;	/**< For ctxlist */
+	/** @map_hash: Memory management - user token hash table for maps */
+	struct drm_open_hash map_hash;
 
-	struct idr ctx_idr;
+	/**
+	 * @ctxlist:
+	 * Context handle management - linked list of context handles
+	 */
+	struct list_head ctxlist;
 
-	struct list_head vmalist;	/**< List of vmas (for debugging) */
+	/**
+	 * @ctxlist_mutex:
+	 *
+	 * Context handle management - mutex for &ctxlist
+	 */
+	struct mutex ctxlist_mutex;
 
-	/*@} */
+	/**
+	 * @ctx_idr:
+	 * Context handle management
+	 */
+	struct idr ctx_idr;
 
-	/** \name DMA support */
-	/*@{ */
-	struct drm_device_dma *dma;		/**< Optional pointer for DMA support */
-	/*@} */
+	/**
+	 * @vmalist:
+	 * Context handle management - list of vmas (for debugging)
+	 */
+	struct list_head vmalist;
+
+	/** @dma: Optional pointer for DMA support */
+	struct drm_device_dma *dma;
 
-	/** \name Context support */
-	/*@{ */
+	/** @context_flag: Context swapping flag */
+	__volatile__ long context_flag;
 
-	__volatile__ long context_flag;	/**< Context swapping flag */
-	int last_context;		/**< Last current context */
-	/*@} */
+	/** @last_context: Last current context */
+	int last_context;
 
 	/**
 	 * @irq_enabled:
@@ -168,7 +224,12 @@ struct drm_device {
 	 */
 	struct drm_vblank_crtc *vblank;
 
-	spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
+	/**
+	 * @vblank_time_lock:
+	 *
+	 *  Protects vblank count and time updates during vblank enable/disable
+	 */
+	spinlock_t vblank_time_lock;
 	spinlock_t vbl_lock;
 
 	/**
@@ -186,25 +247,29 @@ struct drm_device {
 	 *
 	 * If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set.
 	 */
-	u32 max_vblank_count;           /**< size of vblank counter register */
 
-	/**
-	 * List of events
-	 */
+	/** @max_vblank_count: Size of vblank counter register */
+	u32 max_vblank_count;
+
+	/** @vblank_event_list: List of vblank events */
 	struct list_head vblank_event_list;
 	spinlock_t event_lock;
 
-	/*@} */
+	/** @agp: AGP data */
+	struct drm_agp_head *agp;
 
-	struct drm_agp_head *agp;	/**< AGP data */
+	/** @pdev: PCI device structure */
+	struct pci_dev *pdev;
 
-	struct pci_dev *pdev;		/**< PCI device structure */
 #ifdef __alpha__
 	struct pci_controller *hose;
 #endif
 
-	struct drm_sg_mem *sg;	/**< Scatter gather memory */
-	unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
+	/** @sg: Scatter gather memory */
+	struct drm_sg_mem *sg;
+
+	/** @num_crtcs: Number of CRTCs on this device */
+	unsigned int num_crtcs;
 
 	struct {
 		int context;
@@ -214,14 +279,18 @@ struct drm_device {
 	struct drm_local_map *agp_buffer_map;
 	unsigned int agp_buffer_token;
 
-	struct drm_mode_config mode_config;	/**< Current mode config */
+	/** @mode_config: Current mode config */
+	struct drm_mode_config mode_config;
 
-	/** \name GEM information */
-	/*@{ */
+	/** @object_name_lock: GEM information */
 	struct mutex object_name_lock;
+
+	/** @object_name_idr: GEM information */
 	struct idr object_name_idr;
+
+	/** @vma_offset_manager: GEM information */
 	struct drm_vma_offset_manager *vma_offset_manager;
-	/*@} */
+
 	int switch_power_state;
 
 	/**