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1/* SPDX-License-Identifier: GPL-2.0 or MIT */
2
3#ifndef _DRM_CLIENT_H_
4#define _DRM_CLIENT_H_
5
6#include <linux/iosys-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 * @pitch: Buffer pitch
131 */
132 u32 pitch;
133
134 /**
135 * @gem: GEM object backing this buffer
136 */
137 struct drm_gem_object *gem;
138
139 /**
140 * @map: Virtual address for the buffer
141 */
142 struct iosys_map map;
143
144 /**
145 * @fb: DRM framebuffer
146 */
147 struct drm_framebuffer *fb;
148};
149
150struct drm_client_buffer *
151drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format);
152void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);
153int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect);
154int drm_client_buffer_vmap(struct drm_client_buffer *buffer,
155 struct iosys_map *map);
156void drm_client_buffer_vunmap(struct drm_client_buffer *buffer);
157
158int drm_client_modeset_create(struct drm_client_dev *client);
159void drm_client_modeset_free(struct drm_client_dev *client);
160int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height);
161bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation);
162int drm_client_modeset_check(struct drm_client_dev *client);
163int drm_client_modeset_commit_locked(struct drm_client_dev *client);
164int drm_client_modeset_commit(struct drm_client_dev *client);
165int drm_client_modeset_dpms(struct drm_client_dev *client, int mode);
166
167/**
168 * drm_client_for_each_modeset() - Iterate over client modesets
169 * @modeset: &drm_mode_set loop cursor
170 * @client: DRM client
171 */
172#define drm_client_for_each_modeset(modeset, client) \
173 for (({ lockdep_assert_held(&(client)->modeset_mutex); }), \
174 modeset = (client)->modesets; modeset->crtc; modeset++)
175
176/**
177 * drm_client_for_each_connector_iter - connector_list iterator macro
178 * @connector: &struct drm_connector pointer used as cursor
179 * @iter: &struct drm_connector_list_iter
180 *
181 * This iterates the connectors that are useable for internal clients (excludes
182 * writeback connectors).
183 *
184 * For more info see drm_for_each_connector_iter().
185 */
186#define drm_client_for_each_connector_iter(connector, iter) \
187 drm_for_each_connector_iter(connector, iter) \
188 if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
189
190void drm_client_debugfs_init(struct drm_minor *minor);
191
192#endif
1/* SPDX-License-Identifier: GPL-2.0 or MIT */
2
3#ifndef _DRM_CLIENT_H_
4#define _DRM_CLIENT_H_
5
6#include <linux/iosys-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 * @suspend:
69 *
70 * Called when suspending the device.
71 *
72 * This callback is optional.
73 *
74 * FIXME: Some callers hold the console lock when invoking this
75 * function. This interferes with fbdev emulation, which
76 * also tries to acquire the lock. Push the console lock
77 * into the callback and remove 'holds_console_lock'.
78 */
79 int (*suspend)(struct drm_client_dev *client, bool holds_console_lock);
80
81 /**
82 * @resume:
83 *
84 * Called when resuming the device from suspend.
85 *
86 * This callback is optional.
87 *
88 * FIXME: Some callers hold the console lock when invoking this
89 * function. This interferes with fbdev emulation, which
90 * also tries to acquire the lock. Push the console lock
91 * into the callback and remove 'holds_console_lock'.
92 */
93 int (*resume)(struct drm_client_dev *client, bool holds_console_lock);
94};
95
96/**
97 * struct drm_client_dev - DRM client instance
98 */
99struct drm_client_dev {
100 /**
101 * @dev: DRM device
102 */
103 struct drm_device *dev;
104
105 /**
106 * @name: Name of the client.
107 */
108 const char *name;
109
110 /**
111 * @list:
112 *
113 * List of all clients of a DRM device, linked into
114 * &drm_device.clientlist. Protected by &drm_device.clientlist_mutex.
115 */
116 struct list_head list;
117
118 /**
119 * @funcs: DRM client functions (optional)
120 */
121 const struct drm_client_funcs *funcs;
122
123 /**
124 * @file: DRM file
125 */
126 struct drm_file *file;
127
128 /**
129 * @modeset_mutex: Protects @modesets.
130 */
131 struct mutex modeset_mutex;
132
133 /**
134 * @modesets: CRTC configurations
135 */
136 struct drm_mode_set *modesets;
137
138 /**
139 * @suspended:
140 *
141 * The client has been suspended.
142 */
143 bool suspended;
144
145 /**
146 * @hotplug_failed:
147 *
148 * Set by client hotplug helpers if the hotplugging failed
149 * before. It is usually not tried again.
150 */
151 bool hotplug_failed;
152};
153
154int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
155 const char *name, const struct drm_client_funcs *funcs);
156void drm_client_release(struct drm_client_dev *client);
157void drm_client_register(struct drm_client_dev *client);
158
159/**
160 * struct drm_client_buffer - DRM client buffer
161 */
162struct drm_client_buffer {
163 /**
164 * @client: DRM client
165 */
166 struct drm_client_dev *client;
167
168 /**
169 * @pitch: Buffer pitch
170 */
171 u32 pitch;
172
173 /**
174 * @gem: GEM object backing this buffer
175 *
176 * FIXME: The dependency on GEM here isn't required, we could
177 * convert the driver handle to a dma-buf instead and use the
178 * backend-agnostic dma-buf vmap support instead. This would
179 * require that the handle2fd prime ioctl is reworked to pull the
180 * fd_install step out of the driver backend hooks, to make that
181 * final step optional for internal users.
182 */
183 struct drm_gem_object *gem;
184
185 /**
186 * @map: Virtual address for the buffer
187 */
188 struct iosys_map map;
189
190 /**
191 * @fb: DRM framebuffer
192 */
193 struct drm_framebuffer *fb;
194};
195
196struct drm_client_buffer *
197drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format);
198void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);
199int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect);
200int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer,
201 struct iosys_map *map_copy);
202void drm_client_buffer_vunmap_local(struct drm_client_buffer *buffer);
203int drm_client_buffer_vmap(struct drm_client_buffer *buffer,
204 struct iosys_map *map);
205void drm_client_buffer_vunmap(struct drm_client_buffer *buffer);
206
207int drm_client_modeset_create(struct drm_client_dev *client);
208void drm_client_modeset_free(struct drm_client_dev *client);
209int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height);
210bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation);
211int drm_client_modeset_check(struct drm_client_dev *client);
212int drm_client_modeset_commit_locked(struct drm_client_dev *client);
213int drm_client_modeset_commit(struct drm_client_dev *client);
214int drm_client_modeset_dpms(struct drm_client_dev *client, int mode);
215
216/**
217 * drm_client_for_each_modeset() - Iterate over client modesets
218 * @modeset: &drm_mode_set loop cursor
219 * @client: DRM client
220 */
221#define drm_client_for_each_modeset(modeset, client) \
222 for (({ lockdep_assert_held(&(client)->modeset_mutex); }), \
223 modeset = (client)->modesets; modeset->crtc; modeset++)
224
225/**
226 * drm_client_for_each_connector_iter - connector_list iterator macro
227 * @connector: &struct drm_connector pointer used as cursor
228 * @iter: &struct drm_connector_list_iter
229 *
230 * This iterates the connectors that are useable for internal clients (excludes
231 * writeback connectors).
232 *
233 * For more info see drm_for_each_connector_iter().
234 */
235#define drm_client_for_each_connector_iter(connector, iter) \
236 drm_for_each_connector_iter(connector, iter) \
237 if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
238
239#endif