1/* SPDX-License-Identifier: GPL-2.0 or MIT */
  2
  3#ifndef _DRM_CLIENT_H_
  4#define _DRM_CLIENT_H_
  5
  6#include <linux/dma-buf-map.h>
  7#include <linux/lockdep.h>
  8#include <linux/mutex.h>
  9#include <linux/types.h>
 10
 11#include <drm/drm_connector.h>
 12#include <drm/drm_crtc.h>
 13
 14struct drm_client_dev;
 15struct drm_device;
 16struct drm_file;
 17struct drm_framebuffer;
 18struct drm_gem_object;
 19struct drm_minor;
 20struct module;
 21
 22/**
 23 * struct drm_client_funcs - DRM client callbacks
 24 */
 25struct drm_client_funcs {
 26	/**
 27	 * @owner: The module owner
 28	 */
 29	struct module *owner;
 30
 31	/**
 32	 * @unregister:
 33	 *
 34	 * Called when &drm_device is unregistered. The client should respond by
 35	 * releasing its resources using drm_client_release().
 36	 *
 37	 * This callback is optional.
 38	 */
 39	void (*unregister)(struct drm_client_dev *client);
 40
 41	/**
 42	 * @restore:
 43	 *
 44	 * Called on drm_lastclose(). The first client instance in the list that
 45	 * returns zero gets the privilege to restore and no more clients are
 46	 * called. This callback is not called after @unregister has been called.
 47	 *
 48	 * Note that the core does not guarantee exclusion against concurrent
 49	 * drm_open(). Clients need to ensure this themselves, for example by
 50	 * using drm_master_internal_acquire() and
 51	 * drm_master_internal_release().
 52	 *
 53	 * This callback is optional.
 54	 */
 55	int (*restore)(struct drm_client_dev *client);
 56
 57	/**
 58	 * @hotplug:
 59	 *
 60	 * Called on drm_kms_helper_hotplug_event().
 61	 * This callback is not called after @unregister has been called.
 62	 *
 63	 * This callback is optional.
 64	 */
 65	int (*hotplug)(struct drm_client_dev *client);
 66};
 67
 68/**
 69 * struct drm_client_dev - DRM client instance
 70 */
 71struct drm_client_dev {
 72	/**
 73	 * @dev: DRM device
 74	 */
 75	struct drm_device *dev;
 76
 77	/**
 78	 * @name: Name of the client.
 79	 */
 80	const char *name;
 81
 82	/**
 83	 * @list:
 84	 *
 85	 * List of all clients of a DRM device, linked into
 86	 * &drm_device.clientlist. Protected by &drm_device.clientlist_mutex.
 87	 */
 88	struct list_head list;
 89
 90	/**
 91	 * @funcs: DRM client functions (optional)
 92	 */
 93	const struct drm_client_funcs *funcs;
 94
 95	/**
 96	 * @file: DRM file
 97	 */
 98	struct drm_file *file;
 99
100	/**
101	 * @modeset_mutex: Protects @modesets.
102	 */
103	struct mutex modeset_mutex;
104
105	/**
106	 * @modesets: CRTC configurations
107	 */
108	struct drm_mode_set *modesets;
109};
110
111int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
112		    const char *name, const struct drm_client_funcs *funcs);
113void drm_client_release(struct drm_client_dev *client);
114void drm_client_register(struct drm_client_dev *client);
115
116void drm_client_dev_unregister(struct drm_device *dev);
117void drm_client_dev_hotplug(struct drm_device *dev);
118void drm_client_dev_restore(struct drm_device *dev);
119
120/**
121 * struct drm_client_buffer - DRM client buffer
122 */
123struct drm_client_buffer {
124	/**
125	 * @client: DRM client
126	 */
127	struct drm_client_dev *client;
128
129	/**
130	 * @handle: Buffer handle
131	 */
132	u32 handle;
133
134	/**
135	 * @pitch: Buffer pitch
136	 */
137	u32 pitch;
138
139	/**
140	 * @gem: GEM object backing this buffer
141	 */
142	struct drm_gem_object *gem;
143
144	/**
145	 * @map: Virtual address for the buffer
146	 */
147	struct dma_buf_map map;
148
149	/**
150	 * @fb: DRM framebuffer
151	 */
152	struct drm_framebuffer *fb;
153};
154
155struct drm_client_buffer *
156drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format);
157void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);
158int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect);
159int drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map);
160void drm_client_buffer_vunmap(struct drm_client_buffer *buffer);
161
162int drm_client_modeset_create(struct drm_client_dev *client);
163void drm_client_modeset_free(struct drm_client_dev *client);
164int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height);
165bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation);
166int drm_client_modeset_check(struct drm_client_dev *client);
167int drm_client_modeset_commit_locked(struct drm_client_dev *client);
168int drm_client_modeset_commit(struct drm_client_dev *client);
169int drm_client_modeset_dpms(struct drm_client_dev *client, int mode);
170
171/**
172 * drm_client_for_each_modeset() - Iterate over client modesets
173 * @modeset: &drm_mode_set loop cursor
174 * @client: DRM client
175 */
176#define drm_client_for_each_modeset(modeset, client) \
177	for (({ lockdep_assert_held(&(client)->modeset_mutex); }), \
178	     modeset = (client)->modesets; modeset->crtc; modeset++)
179
180/**
181 * drm_client_for_each_connector_iter - connector_list iterator macro
182 * @connector: &struct drm_connector pointer used as cursor
183 * @iter: &struct drm_connector_list_iter
184 *
185 * This iterates the connectors that are useable for internal clients (excludes
186 * writeback connectors).
187 *
188 * For more info see drm_for_each_connector_iter().
189 */
190#define drm_client_for_each_connector_iter(connector, iter) \
191	drm_for_each_connector_iter(connector, iter) \
192		if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
193
194void drm_client_debugfs_init(struct drm_minor *minor);
195
196#endif