include/drm/drm_client.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef _DRM_CLIENT_H_
   4 #define _DRM_CLIENT_H_
   5
   6 #include <linux/types.h>
   7
   8 struct drm_client_dev;
   9 struct drm_device;
  10 struct drm_file;
  11 struct drm_framebuffer;
  12 struct drm_gem_object;
  13 struct drm_minor;
  14 struct module;
  15
  16 /**
  17  * struct drm_client_funcs - DRM client callbacks
  18  */
  19 struct drm_client_funcs {
  20         /**
  21          * @owner: The module owner
  22          */
  23         struct module *owner;
  24
  25         /**
  26          * @unregister:
  27          *
  28          * Called when &drm_device is unregistered. The client should respond by
  29          * releasing it's resources using drm_client_release().
  30          *
  31          * This callback is optional.
  32          */
  33         void (*unregister)(struct drm_client_dev *client);
  34
  35         /**
  36          * @restore:
  37          *
  38          * Called on drm_lastclose(). The first client instance in the list that
  39          * returns zero gets the privilege to restore and no more clients are
  40          * called. This callback is not called after @unregister has been called.
  41          *
  42          * This callback is optional.
  43          */
  44         int (*restore)(struct drm_client_dev *client);
  45
  46         /**
  47          * @hotplug:
  48          *
  49          * Called on drm_kms_helper_hotplug_event().
  50          * This callback is not called after @unregister has been called.
  51          *
  52          * This callback is optional.
  53          */
  54         int (*hotplug)(struct drm_client_dev *client);
  55 };
  56
  57 /**
  58  * struct drm_client_dev - DRM client instance
  59  */
  60 struct drm_client_dev {
  61         /**
  62          * @dev: DRM device
  63          */
  64         struct drm_device *dev;
  65
  66         /**
  67          * @name: Name of the client.
  68          */
  69         const char *name;
  70
  71         /**
  72          * @list:
  73          *
  74          * List of all clients of a DRM device, linked into
  75          * &drm_device.clientlist. Protected by &drm_device.clientlist_mutex.
  76          */
  77         struct list_head list;
  78
  79         /**
  80          * @funcs: DRM client functions (optional)
  81          */
  82         const struct drm_client_funcs *funcs;
  83
  84         /**
  85          * @file: DRM file
  86          */
  87         struct drm_file *file;
  88 };
  89
  90 int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
  91                     const char *name, const struct drm_client_funcs *funcs);
  92 void drm_client_release(struct drm_client_dev *client);
  93 void drm_client_add(struct drm_client_dev *client);
  94
  95 void drm_client_dev_unregister(struct drm_device *dev);
  96 void drm_client_dev_hotplug(struct drm_device *dev);
  97 void drm_client_dev_restore(struct drm_device *dev);
  98
  99 /**
 100  * struct drm_client_buffer - DRM client buffer
 101  */
 102 struct drm_client_buffer {
 103         /**
 104          * @client: DRM client
 105          */
 106         struct drm_client_dev *client;
 107
 108         /**
 109          * @handle: Buffer handle
 110          */
 111         u32 handle;
 112
 113         /**
 114          * @pitch: Buffer pitch
 115          */
 116         u32 pitch;
 117
 118         /**
 119          * @gem: GEM object backing this buffer
 120          */
 121         struct drm_gem_object *gem;
 122
 123         /**
 124          * @vaddr: Virtual address for the buffer
 125          */
 126         void *vaddr;
 127
 128         /**
 129          * @fb: DRM framebuffer
 130          */
 131         struct drm_framebuffer *fb;
 132 };
 133
 134 struct drm_client_buffer *
 135 drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format);
 136 void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);
 137
 138 int drm_client_debugfs_init(struct drm_minor *minor);
 139
 140 #endif