summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/drm_mode_config.c
blob: 703bfce975bbc296c9ad470bea2b731e9cb2e385 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include <drm/drm_encoder.h>
#include <drm/drm_mode_config.h>
#include <drm/drmP.h>

#include "drm_crtc_internal.h"
#include "drm_internal.h"

int drm_modeset_register_all(struct drm_device *dev)
{
	int ret;

	ret = drm_plane_register_all(dev);
	if (ret)
		goto err_plane;

	ret = drm_crtc_register_all(dev);
	if  (ret)
		goto err_crtc;

	ret = drm_encoder_register_all(dev);
	if (ret)
		goto err_encoder;

	ret = drm_connector_register_all(dev);
	if (ret)
		goto err_connector;

	return 0;

err_connector:
	drm_encoder_unregister_all(dev);
err_encoder:
	drm_crtc_unregister_all(dev);
err_crtc:
	drm_plane_unregister_all(dev);
err_plane:
	return ret;
}

void drm_modeset_unregister_all(struct drm_device *dev)
{
	drm_connector_unregister_all(dev);
	drm_encoder_unregister_all(dev);
	drm_crtc_unregister_all(dev);
	drm_plane_unregister_all(dev);
}

/**
 * drm_mode_getresources - get graphics configuration
 * @dev: drm device for the ioctl
 * @data: data pointer for the ioctl
 * @file_priv: drm file for the ioctl call
 *
 * Construct a set of configuration description structures and return
 * them to the user, including CRTC, connector and framebuffer configuration.
 *
 * Called by the user via ioctl.
 *
 * Returns:
 * Zero on success, negative errno on failure.
 */
int drm_mode_getresources(struct drm_device *dev, void *data,
			  struct drm_file *file_priv)
{
	struct drm_mode_card_res *card_res = data;
	struct drm_framebuffer *fb;
	struct drm_connector *connector;
	struct drm_crtc *crtc;
	struct drm_encoder *encoder;
	int count, ret = 0;
	uint32_t __user *fb_id;
	uint32_t __user *crtc_id;
	uint32_t __user *connector_id;
	uint32_t __user *encoder_id;
	struct drm_connector_list_iter conn_iter;

	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		return -EOPNOTSUPP;

	mutex_lock(&file_priv->fbs_lock);
	count = 0;
	fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
	list_for_each_entry(fb, &file_priv->fbs, filp_head) {
		if (count < card_res->count_fbs &&
		    put_user(fb->base.id, fb_id + count)) {
			mutex_unlock(&file_priv->fbs_lock);
			return -EFAULT;
		}
		count++;
	}
	card_res->count_fbs = count;
	mutex_unlock(&file_priv->fbs_lock);

	card_res->max_height = dev->mode_config.max_height;
	card_res->min_height = dev->mode_config.min_height;
	card_res->max_width = dev->mode_config.max_width;
	card_res->min_width = dev->mode_config.min_width;

	count = 0;
	crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
	drm_for_each_crtc(crtc, dev) {
		if (drm_lease_held(file_priv, crtc->base.id)) {
			if (count < card_res->count_crtcs &&
			    put_user(crtc->base.id, crtc_id + count))
				return -EFAULT;
			count++;
		}
	}
	card_res->count_crtcs = count;

	count = 0;
	encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
	drm_for_each_encoder(encoder, dev) {
		if (count < card_res->count_encoders &&
		    put_user(encoder->base.id, encoder_id + count))
			return -EFAULT;
		count++;
	}
	card_res->count_encoders = count;

	drm_connector_list_iter_begin(dev, &conn_iter);
	count = 0;
	connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
	drm_for_each_connector_iter(connector, &conn_iter) {
		/* only expose writeback connectors if userspace understands them */
		if (!file_priv->writeback_connectors &&
		    (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
			continue;

		if (drm_lease_held(file_priv, connector->base.id)) {
			if (count < card_res->count_connectors &&
			    put_user(connector->base.id, connector_id + count)) {
				drm_connector_list_iter_end(&conn_iter);
				return -EFAULT;
			}
			count++;
		}
	}
	card_res->count_connectors = count;
	drm_connector_list_iter_end(&conn_iter);

	return ret;
}

/**
 * drm_mode_config_reset - call ->reset callbacks
 * @dev: drm device
 *
 * This functions calls all the crtc's, encoder's and connector's ->reset
 * callback. Drivers can use this in e.g. their driver load or resume code to
 * reset hardware and software state.
 */
void drm_mode_config_reset(struct drm_device *dev)
{
	struct drm_crtc *crtc;
	struct drm_plane *plane;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	struct drm_connector_list_iter conn_iter;

	drm_for_each_plane(plane, dev)
		if (plane->funcs->reset)
			plane->funcs->reset(plane);

	drm_for_each_crtc(crtc, dev)
		if (crtc->funcs->reset)
			crtc->funcs->reset(crtc);

	drm_for_each_encoder(encoder, dev)
		if (encoder->funcs->reset)
			encoder->funcs->reset(encoder);

	drm_connector_list_iter_begin(dev, &conn_iter);
	drm_for_each_connector_iter(connector, &conn_iter)
		if (connector->funcs->reset)
			connector->funcs->reset(connector);
	drm_connector_list_iter_end(&conn_iter);
}
EXPORT_SYMBOL(drm_mode_config_reset);

/*
 * Global properties
 */
static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
	{ DRM_PLANE_TYPE_OVERLAY, "Overlay" },
	{ DRM_PLANE_TYPE_PRIMARY, "Primary" },
	{ DRM_PLANE_TYPE_CURSOR, "Cursor" },
};

static int drm_mode_create_standard_properties(struct drm_device *dev)
{
	struct drm_property *prop;
	int ret;

	ret = drm_connector_create_standard_properties(dev);
	if (ret)
		return ret;

	prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
					"type", drm_plane_type_enum_list,
					ARRAY_SIZE(drm_plane_type_enum_list));
	if (!prop)
		return -ENOMEM;
	dev->mode_config.plane_type_property = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"SRC_X", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_src_x = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"SRC_Y", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_src_y = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"SRC_W", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_src_w = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"SRC_H", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_src_h = prop;

	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
			"CRTC_X", INT_MIN, INT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_crtc_x = prop;

	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
			"CRTC_Y", INT_MIN, INT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_crtc_y = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"CRTC_W", 0, INT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_crtc_w = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"CRTC_H", 0, INT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_crtc_h = prop;

	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
			"FB_ID", DRM_MODE_OBJECT_FB);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_fb_id = prop;

	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
			"IN_FENCE_FD", -1, INT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_in_fence_fd = prop;

	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
			"OUT_FENCE_PTR", 0, U64_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_out_fence_ptr = prop;

	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
			"CRTC_ID", DRM_MODE_OBJECT_CRTC);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_crtc_id = prop;

	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "FB_DAMAGE_CLIPS",
				   0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_fb_damage_clips = prop;

	prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
			"ACTIVE");
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_active = prop;

	prop = drm_property_create(dev,
			DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
			"MODE_ID", 0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_mode_id = prop;

	prop = drm_property_create_bool(dev, 0,
			"VRR_ENABLED");
	if (!prop)
		return -ENOMEM;
	dev->mode_config.prop_vrr_enabled = prop;

	prop = drm_property_create(dev,
			DRM_MODE_PROP_BLOB,
			"DEGAMMA_LUT", 0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.degamma_lut_property = prop;

	prop = drm_property_create_range(dev,
			DRM_MODE_PROP_IMMUTABLE,
			"DEGAMMA_LUT_SIZE", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.degamma_lut_size_property = prop;

	prop = drm_property_create(dev,
			DRM_MODE_PROP_BLOB,
			"CTM", 0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.ctm_property = prop;

	prop = drm_property_create(dev,
			DRM_MODE_PROP_BLOB,
			"GAMMA_LUT", 0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.gamma_lut_property = prop;

	prop = drm_property_create_range(dev,
			DRM_MODE_PROP_IMMUTABLE,
			"GAMMA_LUT_SIZE", 0, UINT_MAX);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.gamma_lut_size_property = prop;

	prop = drm_property_create(dev,
				   DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
				   "IN_FORMATS", 0);
	if (!prop)
		return -ENOMEM;
	dev->mode_config.modifiers_property = prop;

	return 0;
}

/**
 * drm_mode_config_init - initialize DRM mode_configuration structure
 * @dev: DRM device
 *
 * Initialize @dev's mode_config structure, used for tracking the graphics
 * configuration of @dev.
 *
 * Since this initializes the modeset locks, no locking is possible. Which is no
 * problem, since this should happen single threaded at init time. It is the
 * driver's problem to ensure this guarantee.
 *
 */
void drm_mode_config_init(struct drm_device *dev)
{
	mutex_init(&dev->mode_config.mutex);
	drm_modeset_lock_init(&dev->mode_config.connection_mutex);
	mutex_init(&dev->mode_config.idr_mutex);
	mutex_init(&dev->mode_config.fb_lock);
	mutex_init(&dev->mode_config.blob_lock);
	INIT_LIST_HEAD(&dev->mode_config.fb_list);
	INIT_LIST_HEAD(&dev->mode_config.crtc_list);
	INIT_LIST_HEAD(&dev->mode_config.connector_list);
	INIT_LIST_HEAD(&dev->mode_config.encoder_list);
	INIT_LIST_HEAD(&dev->mode_config.property_list);
	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
	INIT_LIST_HEAD(&dev->mode_config.plane_list);
	idr_init(&dev->mode_config.crtc_idr);
	idr_init(&dev->mode_config.tile_idr);
	ida_init(&dev->mode_config.connector_ida);
	spin_lock_init(&dev->mode_config.connector_list_lock);

	init_llist_head(&dev->mode_config.connector_free_list);
	INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);

	drm_mode_create_standard_properties(dev);

	/* Just to be sure */
	dev->mode_config.num_fb = 0;
	dev->mode_config.num_connector = 0;
	dev->mode_config.num_crtc = 0;
	dev->mode_config.num_encoder = 0;
	dev->mode_config.num_total_plane = 0;
}
EXPORT_SYMBOL(drm_mode_config_init);

/**
 * drm_mode_config_cleanup - free up DRM mode_config info
 * @dev: DRM device
 *
 * Free up all the connectors and CRTCs associated with this DRM device, then
 * free up the framebuffers and associated buffer objects.
 *
 * Note that since this /should/ happen single-threaded at driver/device
 * teardown time, no locking is required. It's the driver's job to ensure that
 * this guarantee actually holds true.
 *
 * FIXME: cleanup any dangling user buffer objects too
 */
void drm_mode_config_cleanup(struct drm_device *dev)
{
	struct drm_connector *connector;
	struct drm_connector_list_iter conn_iter;
	struct drm_crtc *crtc, *ct;
	struct drm_encoder *encoder, *enct;
	struct drm_framebuffer *fb, *fbt;
	struct drm_property *property, *pt;
	struct drm_property_blob *blob, *bt;
	struct drm_plane *plane, *plt;

	list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
				 head) {
		encoder->funcs->destroy(encoder);
	}

	drm_connector_list_iter_begin(dev, &conn_iter);
	drm_for_each_connector_iter(connector, &conn_iter) {
		/* drm_connector_list_iter holds an full reference to the
		 * current connector itself, which means it is inherently safe
		 * against unreferencing the current connector - but not against
		 * deleting it right away. */
		drm_connector_put(connector);
	}
	drm_connector_list_iter_end(&conn_iter);
	/* connector_iter drops references in a work item. */
	flush_work(&dev->mode_config.connector_free_work);
	if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
		drm_connector_list_iter_begin(dev, &conn_iter);
		drm_for_each_connector_iter(connector, &conn_iter)
			DRM_ERROR("connector %s leaked!\n", connector->name);
		drm_connector_list_iter_end(&conn_iter);
	}

	list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
				 head) {
		drm_property_destroy(dev, property);
	}

	list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
				 head) {
		plane->funcs->destroy(plane);
	}

	list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
		crtc->funcs->destroy(crtc);
	}

	list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
				 head_global) {
		drm_property_blob_put(blob);
	}

	/*
	 * Single-threaded teardown context, so it's not required to grab the
	 * fb_lock to protect against concurrent fb_list access. Contrary, it
	 * would actually deadlock with the drm_framebuffer_cleanup function.
	 *
	 * Also, if there are any framebuffers left, that's a driver leak now,
	 * so politely WARN about this.
	 */
	WARN_ON(!list_empty(&dev->mode_config.fb_list));
	list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
		struct drm_printer p = drm_debug_printer("[leaked fb]");
		drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
		drm_framebuffer_print_info(&p, 1, fb);
		drm_framebuffer_free(&fb->base.refcount);
	}

	ida_destroy(&dev->mode_config.connector_ida);
	idr_destroy(&dev->mode_config.tile_idr);
	idr_destroy(&dev->mode_config.crtc_idr);
	drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
}
EXPORT_SYMBOL(drm_mode_config_cleanup);