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1 /*
2  * Copyright (c) 2016 Intel Corporation
3  *
4  * Permission to use, copy, modify, distribute, and sell this software and its
5  * documentation for any purpose is hereby granted without fee, provided that
6  * the above copyright notice appear in all copies and that both that copyright
7  * notice and this permission notice appear in supporting documentation, and
8  * that the name of the copyright holders not be used in advertising or
9  * publicity pertaining to distribution of the software without specific,
10  * written prior permission.  The copyright holders make no representations
11  * about the suitability of this software for any purpose.  It is provided "as
12  * is" without express or implied warranty.
13  *
14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20  * OF THIS SOFTWARE.
21  */
22 
23 #ifndef __DRM_MODE_CONFIG_H__
24 #define __DRM_MODE_CONFIG_H__
25 
26 #include <linux/mutex.h>
27 #include <linux/types.h>
28 #include <linux/idr.h>
29 #include <linux/workqueue.h>
30 #include <linux/llist.h>
31 
32 #include <drm/drm_modeset_lock.h>
33 
34 struct drm_file;
35 struct drm_device;
36 struct drm_atomic_state;
37 struct drm_mode_fb_cmd2;
38 struct drm_format_info;
39 struct drm_display_mode;
40 
41 /**
42  * struct drm_mode_config_funcs - basic driver provided mode setting functions
43  *
44  * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
45  * involve drivers.
46  */
47 struct drm_mode_config_funcs {
48 	/**
49 	 * @fb_create:
50 	 *
51 	 * Create a new framebuffer object. The core does basic checks on the
52 	 * requested metadata, but most of that is left to the driver. See
53 	 * &struct drm_mode_fb_cmd2 for details.
54 	 *
55 	 * To validate the pixel format and modifier drivers can use
56 	 * drm_any_plane_has_format() to make sure at least one plane supports
57 	 * the requested values. Note that the driver must first determine the
58 	 * actual modifier used if the request doesn't have it specified,
59 	 * ie. when (@mode_cmd->flags & DRM_MODE_FB_MODIFIERS) == 0.
60 	 *
61 	 * If the parameters are deemed valid and the backing storage objects in
62 	 * the underlying memory manager all exist, then the driver allocates
63 	 * a new &drm_framebuffer structure, subclassed to contain
64 	 * driver-specific information (like the internal native buffer object
65 	 * references). It also needs to fill out all relevant metadata, which
66 	 * should be done by calling drm_helper_mode_fill_fb_struct().
67 	 *
68 	 * The initialization is finalized by calling drm_framebuffer_init(),
69 	 * which registers the framebuffer and makes it accessible to other
70 	 * threads.
71 	 *
72 	 * RETURNS:
73 	 *
74 	 * A new framebuffer with an initial reference count of 1 or a negative
75 	 * error code encoded with ERR_PTR().
76 	 */
77 	struct drm_framebuffer *(*fb_create)(struct drm_device *dev,
78 					     struct drm_file *file_priv,
79 					     const struct drm_mode_fb_cmd2 *mode_cmd);
80 
81 	/**
82 	 * @get_format_info:
83 	 *
84 	 * Allows a driver to return custom format information for special
85 	 * fb layouts (eg. ones with auxiliary compression control planes).
86 	 *
87 	 * RETURNS:
88 	 *
89 	 * The format information specific to the given fb metadata, or
90 	 * NULL if none is found.
91 	 */
92 	const struct drm_format_info *(*get_format_info)(const struct drm_mode_fb_cmd2 *mode_cmd);
93 
94 	/**
95 	 * @output_poll_changed:
96 	 *
97 	 * Callback used by helpers to inform the driver of output configuration
98 	 * changes.
99 	 *
100 	 * Drivers implementing fbdev emulation with the helpers can call
101 	 * drm_fb_helper_hotplug_changed from this hook to inform the fbdev
102 	 * helper of output changes.
103 	 *
104 	 * FIXME:
105 	 *
106 	 * Except that there's no vtable for device-level helper callbacks
107 	 * there's no reason this is a core function.
108 	 */
109 	void (*output_poll_changed)(struct drm_device *dev);
110 
111 	/**
112 	 * @mode_valid:
113 	 *
114 	 * Device specific validation of display modes. Can be used to reject
115 	 * modes that can never be supported. Only device wide constraints can
116 	 * be checked here. crtc/encoder/bridge/connector specific constraints
117 	 * should be checked in the .mode_valid() hook for each specific object.
118 	 */
119 	enum drm_mode_status (*mode_valid)(struct drm_device *dev,
120 					   const struct drm_display_mode *mode);
121 
122 	/**
123 	 * @atomic_check:
124 	 *
125 	 * This is the only hook to validate an atomic modeset update. This
126 	 * function must reject any modeset and state changes which the hardware
127 	 * or driver doesn't support. This includes but is of course not limited
128 	 * to:
129 	 *
130 	 *  - Checking that the modes, framebuffers, scaling and placement
131 	 *    requirements and so on are within the limits of the hardware.
132 	 *
133 	 *  - Checking that any hidden shared resources are not oversubscribed.
134 	 *    This can be shared PLLs, shared lanes, overall memory bandwidth,
135 	 *    display fifo space (where shared between planes or maybe even
136 	 *    CRTCs).
137 	 *
138 	 *  - Checking that virtualized resources exported to userspace are not
139 	 *    oversubscribed. For various reasons it can make sense to expose
140 	 *    more planes, crtcs or encoders than which are physically there. One
141 	 *    example is dual-pipe operations (which generally should be hidden
142 	 *    from userspace if when lockstepped in hardware, exposed otherwise),
143 	 *    where a plane might need 1 hardware plane (if it's just on one
144 	 *    pipe), 2 hardware planes (when it spans both pipes) or maybe even
145 	 *    shared a hardware plane with a 2nd plane (if there's a compatible
146 	 *    plane requested on the area handled by the other pipe).
147 	 *
148 	 *  - Check that any transitional state is possible and that if
149 	 *    requested, the update can indeed be done in the vblank period
150 	 *    without temporarily disabling some functions.
151 	 *
152 	 *  - Check any other constraints the driver or hardware might have.
153 	 *
154 	 *  - This callback also needs to correctly fill out the &drm_crtc_state
155 	 *    in this update to make sure that drm_atomic_crtc_needs_modeset()
156 	 *    reflects the nature of the possible update and returns true if and
157 	 *    only if the update cannot be applied without tearing within one
158 	 *    vblank on that CRTC. The core uses that information to reject
159 	 *    updates which require a full modeset (i.e. blanking the screen, or
160 	 *    at least pausing updates for a substantial amount of time) if
161 	 *    userspace has disallowed that in its request.
162 	 *
163 	 *  - The driver also does not need to repeat basic input validation
164 	 *    like done for the corresponding legacy entry points. The core does
165 	 *    that before calling this hook.
166 	 *
167 	 * See the documentation of @atomic_commit for an exhaustive list of
168 	 * error conditions which don't have to be checked at the in this
169 	 * callback.
170 	 *
171 	 * See the documentation for &struct drm_atomic_state for how exactly
172 	 * an atomic modeset update is described.
173 	 *
174 	 * Drivers using the atomic helpers can implement this hook using
175 	 * drm_atomic_helper_check(), or one of the exported sub-functions of
176 	 * it.
177 	 *
178 	 * RETURNS:
179 	 *
180 	 * 0 on success or one of the below negative error codes:
181 	 *
182 	 *  - -EINVAL, if any of the above constraints are violated.
183 	 *
184 	 *  - -EDEADLK, when returned from an attempt to acquire an additional
185 	 *    &drm_modeset_lock through drm_modeset_lock().
186 	 *
187 	 *  - -ENOMEM, if allocating additional state sub-structures failed due
188 	 *    to lack of memory.
189 	 *
190 	 *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
191 	 *    This can either be due to a pending signal, or because the driver
192 	 *    needs to completely bail out to recover from an exceptional
193 	 *    situation like a GPU hang. From a userspace point all errors are
194 	 *    treated equally.
195 	 */
196 	int (*atomic_check)(struct drm_device *dev,
197 			    struct drm_atomic_state *state);
198 
199 	/**
200 	 * @atomic_commit:
201 	 *
202 	 * This is the only hook to commit an atomic modeset update. The core
203 	 * guarantees that @atomic_check has been called successfully before
204 	 * calling this function, and that nothing has been changed in the
205 	 * interim.
206 	 *
207 	 * See the documentation for &struct drm_atomic_state for how exactly
208 	 * an atomic modeset update is described.
209 	 *
210 	 * Drivers using the atomic helpers can implement this hook using
211 	 * drm_atomic_helper_commit(), or one of the exported sub-functions of
212 	 * it.
213 	 *
214 	 * Nonblocking commits (as indicated with the nonblock parameter) must
215 	 * do any preparatory work which might result in an unsuccessful commit
216 	 * in the context of this callback. The only exceptions are hardware
217 	 * errors resulting in -EIO. But even in that case the driver must
218 	 * ensure that the display pipe is at least running, to avoid
219 	 * compositors crashing when pageflips don't work. Anything else,
220 	 * specifically committing the update to the hardware, should be done
221 	 * without blocking the caller. For updates which do not require a
222 	 * modeset this must be guaranteed.
223 	 *
224 	 * The driver must wait for any pending rendering to the new
225 	 * framebuffers to complete before executing the flip. It should also
226 	 * wait for any pending rendering from other drivers if the underlying
227 	 * buffer is a shared dma-buf. Nonblocking commits must not wait for
228 	 * rendering in the context of this callback.
229 	 *
230 	 * An application can request to be notified when the atomic commit has
231 	 * completed. These events are per-CRTC and can be distinguished by the
232 	 * CRTC index supplied in &drm_event to userspace.
233 	 *
234 	 * The drm core will supply a &struct drm_event in each CRTC's
235 	 * &drm_crtc_state.event. See the documentation for
236 	 * &drm_crtc_state.event for more details about the precise semantics of
237 	 * this event.
238 	 *
239 	 * NOTE:
240 	 *
241 	 * Drivers are not allowed to shut down any display pipe successfully
242 	 * enabled through an atomic commit on their own. Doing so can result in
243 	 * compositors crashing if a page flip is suddenly rejected because the
244 	 * pipe is off.
245 	 *
246 	 * RETURNS:
247 	 *
248 	 * 0 on success or one of the below negative error codes:
249 	 *
250 	 *  - -EBUSY, if a nonblocking updated is requested and there is
251 	 *    an earlier updated pending. Drivers are allowed to support a queue
252 	 *    of outstanding updates, but currently no driver supports that.
253 	 *    Note that drivers must wait for preceding updates to complete if a
254 	 *    synchronous update is requested, they are not allowed to fail the
255 	 *    commit in that case.
256 	 *
257 	 *  - -ENOMEM, if the driver failed to allocate memory. Specifically
258 	 *    this can happen when trying to pin framebuffers, which must only
259 	 *    be done when committing the state.
260 	 *
261 	 *  - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate
262 	 *    that the driver has run out of vram, iommu space or similar GPU
263 	 *    address space needed for framebuffer.
264 	 *
265 	 *  - -EIO, if the hardware completely died.
266 	 *
267 	 *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
268 	 *    This can either be due to a pending signal, or because the driver
269 	 *    needs to completely bail out to recover from an exceptional
270 	 *    situation like a GPU hang. From a userspace point of view all errors are
271 	 *    treated equally.
272 	 *
273 	 * This list is exhaustive. Specifically this hook is not allowed to
274 	 * return -EINVAL (any invalid requests should be caught in
275 	 * @atomic_check) or -EDEADLK (this function must not acquire
276 	 * additional modeset locks).
277 	 */
278 	int (*atomic_commit)(struct drm_device *dev,
279 			     struct drm_atomic_state *state,
280 			     bool nonblock);
281 
282 	/**
283 	 * @atomic_state_alloc:
284 	 *
285 	 * This optional hook can be used by drivers that want to subclass struct
286 	 * &drm_atomic_state to be able to track their own driver-private global
287 	 * state easily. If this hook is implemented, drivers must also
288 	 * implement @atomic_state_clear and @atomic_state_free.
289 	 *
290 	 * Subclassing of &drm_atomic_state is deprecated in favour of using
291 	 * &drm_private_state and &drm_private_obj.
292 	 *
293 	 * RETURNS:
294 	 *
295 	 * A new &drm_atomic_state on success or NULL on failure.
296 	 */
297 	struct drm_atomic_state *(*atomic_state_alloc)(struct drm_device *dev);
298 
299 	/**
300 	 * @atomic_state_clear:
301 	 *
302 	 * This hook must clear any driver private state duplicated into the
303 	 * passed-in &drm_atomic_state. This hook is called when the caller
304 	 * encountered a &drm_modeset_lock deadlock and needs to drop all
305 	 * already acquired locks as part of the deadlock avoidance dance
306 	 * implemented in drm_modeset_backoff().
307 	 *
308 	 * Any duplicated state must be invalidated since a concurrent atomic
309 	 * update might change it, and the drm atomic interfaces always apply
310 	 * updates as relative changes to the current state.
311 	 *
312 	 * Drivers that implement this must call drm_atomic_state_default_clear()
313 	 * to clear common state.
314 	 *
315 	 * Subclassing of &drm_atomic_state is deprecated in favour of using
316 	 * &drm_private_state and &drm_private_obj.
317 	 */
318 	void (*atomic_state_clear)(struct drm_atomic_state *state);
319 
320 	/**
321 	 * @atomic_state_free:
322 	 *
323 	 * This hook needs driver private resources and the &drm_atomic_state
324 	 * itself. Note that the core first calls drm_atomic_state_clear() to
325 	 * avoid code duplicate between the clear and free hooks.
326 	 *
327 	 * Drivers that implement this must call
328 	 * drm_atomic_state_default_release() to release common resources.
329 	 *
330 	 * Subclassing of &drm_atomic_state is deprecated in favour of using
331 	 * &drm_private_state and &drm_private_obj.
332 	 */
333 	void (*atomic_state_free)(struct drm_atomic_state *state);
334 };
335 
336 /**
337  * struct drm_mode_config - Mode configuration control structure
338  * @min_width: minimum fb pixel width on this device
339  * @min_height: minimum fb pixel height on this device
340  * @max_width: maximum fb pixel width on this device
341  * @max_height: maximum fb pixel height on this device
342  * @funcs: core driver provided mode setting functions
343  * @fb_base: base address of the framebuffer
344  * @poll_enabled: track polling support for this device
345  * @poll_running: track polling status for this device
346  * @delayed_event: track delayed poll uevent deliver for this device
347  * @output_poll_work: delayed work for polling in process context
348  * @preferred_depth: preferred RBG pixel depth, used by fb helpers
349  * @prefer_shadow: hint to userspace to prefer shadow-fb rendering
350  * @cursor_width: hint to userspace for max cursor width
351  * @cursor_height: hint to userspace for max cursor height
352  * @helper_private: mid-layer private data
353  *
354  * Core mode resource tracking structure.  All CRTC, encoders, and connectors
355  * enumerated by the driver are added here, as are global properties.  Some
356  * global restrictions are also here, e.g. dimension restrictions.
357  */
358 struct drm_mode_config {
359 	/**
360 	 * @mutex:
361 	 *
362 	 * This is the big scary modeset BKL which protects everything that
363 	 * isn't protect otherwise. Scope is unclear and fuzzy, try to remove
364 	 * anything from under its protection and move it into more well-scoped
365 	 * locks.
366 	 *
367 	 * The one important thing this protects is the use of @acquire_ctx.
368 	 */
369 	struct mutex mutex;
370 
371 	/**
372 	 * @connection_mutex:
373 	 *
374 	 * This protects connector state and the connector to encoder to CRTC
375 	 * routing chain.
376 	 *
377 	 * For atomic drivers specifically this protects &drm_connector.state.
378 	 */
379 	struct drm_modeset_lock connection_mutex;
380 
381 	/**
382 	 * @acquire_ctx:
383 	 *
384 	 * Global implicit acquire context used by atomic drivers for legacy
385 	 * IOCTLs. Deprecated, since implicit locking contexts make it
386 	 * impossible to use driver-private &struct drm_modeset_lock. Users of
387 	 * this must hold @mutex.
388 	 */
389 	struct drm_modeset_acquire_ctx *acquire_ctx;
390 
391 	/**
392 	 * @idr_mutex:
393 	 *
394 	 * Mutex for KMS ID allocation and management. Protects both @object_idr
395 	 * and @tile_idr.
396 	 */
397 	struct mutex idr_mutex;
398 
399 	/**
400 	 * @object_idr:
401 	 *
402 	 * Main KMS ID tracking object. Use this idr for all IDs, fb, crtc,
403 	 * connector, modes - just makes life easier to have only one.
404 	 */
405 	struct idr object_idr;
406 
407 	/**
408 	 * @tile_idr:
409 	 *
410 	 * Use this idr for allocating new IDs for tiled sinks like use in some
411 	 * high-res DP MST screens.
412 	 */
413 	struct idr tile_idr;
414 
415 	/** @fb_lock: Mutex to protect fb the global @fb_list and @num_fb. */
416 	struct mutex fb_lock;
417 	/** @num_fb: Number of entries on @fb_list. */
418 	int num_fb;
419 	/** @fb_list: List of all &struct drm_framebuffer. */
420 	struct list_head fb_list;
421 
422 	/**
423 	 * @connector_list_lock: Protects @num_connector and
424 	 * @connector_list and @connector_free_list.
425 	 */
426 	spinlock_t connector_list_lock;
427 	/**
428 	 * @num_connector: Number of connectors on this device. Protected by
429 	 * @connector_list_lock.
430 	 */
431 	int num_connector;
432 	/**
433 	 * @connector_ida: ID allocator for connector indices.
434 	 */
435 	struct ida connector_ida;
436 	/**
437 	 * @connector_list:
438 	 *
439 	 * List of connector objects linked with &drm_connector.head. Protected
440 	 * by @connector_list_lock. Only use drm_for_each_connector_iter() and
441 	 * &struct drm_connector_list_iter to walk this list.
442 	 */
443 	struct list_head connector_list;
444 	/**
445 	 * @connector_free_list:
446 	 *
447 	 * List of connector objects linked with &drm_connector.free_head.
448 	 * Protected by @connector_list_lock. Used by
449 	 * drm_for_each_connector_iter() and
450 	 * &struct drm_connector_list_iter to savely free connectors using
451 	 * @connector_free_work.
452 	 */
453 	struct llist_head connector_free_list;
454 	/**
455 	 * @connector_free_work: Work to clean up @connector_free_list.
456 	 */
457 	struct work_struct connector_free_work;
458 
459 	/**
460 	 * @num_encoder:
461 	 *
462 	 * Number of encoders on this device. This is invariant over the
463 	 * lifetime of a device and hence doesn't need any locks.
464 	 */
465 	int num_encoder;
466 	/**
467 	 * @encoder_list:
468 	 *
469 	 * List of encoder objects linked with &drm_encoder.head. This is
470 	 * invariant over the lifetime of a device and hence doesn't need any
471 	 * locks.
472 	 */
473 	struct list_head encoder_list;
474 
475 	/**
476 	 * @num_total_plane:
477 	 *
478 	 * Number of universal (i.e. with primary/curso) planes on this device.
479 	 * This is invariant over the lifetime of a device and hence doesn't
480 	 * need any locks.
481 	 */
482 	int num_total_plane;
483 	/**
484 	 * @plane_list:
485 	 *
486 	 * List of plane objects linked with &drm_plane.head. This is invariant
487 	 * over the lifetime of a device and hence doesn't need any locks.
488 	 */
489 	struct list_head plane_list;
490 
491 	/**
492 	 * @num_crtc:
493 	 *
494 	 * Number of CRTCs on this device linked with &drm_crtc.head. This is invariant over the lifetime
495 	 * of a device and hence doesn't need any locks.
496 	 */
497 	int num_crtc;
498 	/**
499 	 * @crtc_list:
500 	 *
501 	 * List of CRTC objects linked with &drm_crtc.head. This is invariant
502 	 * over the lifetime of a device and hence doesn't need any locks.
503 	 */
504 	struct list_head crtc_list;
505 
506 	/**
507 	 * @property_list:
508 	 *
509 	 * List of property type objects linked with &drm_property.head. This is
510 	 * invariant over the lifetime of a device and hence doesn't need any
511 	 * locks.
512 	 */
513 	struct list_head property_list;
514 
515 	/**
516 	 * @privobj_list:
517 	 *
518 	 * List of private objects linked with &drm_private_obj.head. This is
519 	 * invariant over the lifetime of a device and hence doesn't need any
520 	 * locks.
521 	 */
522 	struct list_head privobj_list;
523 
524 	int min_width, min_height;
525 	int max_width, max_height;
526 	const struct drm_mode_config_funcs *funcs;
527 	resource_size_t fb_base;
528 
529 	/* output poll support */
530 	bool poll_enabled;
531 	bool poll_running;
532 	bool delayed_event;
533 	struct delayed_work output_poll_work;
534 
535 	/**
536 	 * @blob_lock:
537 	 *
538 	 * Mutex for blob property allocation and management, protects
539 	 * @property_blob_list and &drm_file.blobs.
540 	 */
541 	struct mutex blob_lock;
542 
543 	/**
544 	 * @property_blob_list:
545 	 *
546 	 * List of all the blob property objects linked with
547 	 * &drm_property_blob.head. Protected by @blob_lock.
548 	 */
549 	struct list_head property_blob_list;
550 
551 	/* pointers to standard properties */
552 
553 	/**
554 	 * @edid_property: Default connector property to hold the EDID of the
555 	 * currently connected sink, if any.
556 	 */
557 	struct drm_property *edid_property;
558 	/**
559 	 * @dpms_property: Default connector property to control the
560 	 * connector's DPMS state.
561 	 */
562 	struct drm_property *dpms_property;
563 	/**
564 	 * @path_property: Default connector property to hold the DP MST path
565 	 * for the port.
566 	 */
567 	struct drm_property *path_property;
568 	/**
569 	 * @tile_property: Default connector property to store the tile
570 	 * position of a tiled screen, for sinks which need to be driven with
571 	 * multiple CRTCs.
572 	 */
573 	struct drm_property *tile_property;
574 	/**
575 	 * @link_status_property: Default connector property for link status
576 	 * of a connector
577 	 */
578 	struct drm_property *link_status_property;
579 	/**
580 	 * @plane_type_property: Default plane property to differentiate
581 	 * CURSOR, PRIMARY and OVERLAY legacy uses of planes.
582 	 */
583 	struct drm_property *plane_type_property;
584 	/**
585 	 * @prop_src_x: Default atomic plane property for the plane source
586 	 * position in the connected &drm_framebuffer.
587 	 */
588 	struct drm_property *prop_src_x;
589 	/**
590 	 * @prop_src_y: Default atomic plane property for the plane source
591 	 * position in the connected &drm_framebuffer.
592 	 */
593 	struct drm_property *prop_src_y;
594 	/**
595 	 * @prop_src_w: Default atomic plane property for the plane source
596 	 * position in the connected &drm_framebuffer.
597 	 */
598 	struct drm_property *prop_src_w;
599 	/**
600 	 * @prop_src_h: Default atomic plane property for the plane source
601 	 * position in the connected &drm_framebuffer.
602 	 */
603 	struct drm_property *prop_src_h;
604 	/**
605 	 * @prop_crtc_x: Default atomic plane property for the plane destination
606 	 * position in the &drm_crtc is being shown on.
607 	 */
608 	struct drm_property *prop_crtc_x;
609 	/**
610 	 * @prop_crtc_y: Default atomic plane property for the plane destination
611 	 * position in the &drm_crtc is being shown on.
612 	 */
613 	struct drm_property *prop_crtc_y;
614 	/**
615 	 * @prop_crtc_w: Default atomic plane property for the plane destination
616 	 * position in the &drm_crtc is being shown on.
617 	 */
618 	struct drm_property *prop_crtc_w;
619 	/**
620 	 * @prop_crtc_h: Default atomic plane property for the plane destination
621 	 * position in the &drm_crtc is being shown on.
622 	 */
623 	struct drm_property *prop_crtc_h;
624 	/**
625 	 * @prop_fb_id: Default atomic plane property to specify the
626 	 * &drm_framebuffer.
627 	 */
628 	struct drm_property *prop_fb_id;
629 	/**
630 	 * @prop_in_fence_fd: Sync File fd representing the incoming fences
631 	 * for a Plane.
632 	 */
633 	struct drm_property *prop_in_fence_fd;
634 	/**
635 	 * @prop_out_fence_ptr: Sync File fd pointer representing the
636 	 * outgoing fences for a CRTC. Userspace should provide a pointer to a
637 	 * value of type s32, and then cast that pointer to u64.
638 	 */
639 	struct drm_property *prop_out_fence_ptr;
640 	/**
641 	 * @prop_crtc_id: Default atomic plane property to specify the
642 	 * &drm_crtc.
643 	 */
644 	struct drm_property *prop_crtc_id;
645 	/**
646 	 * @prop_fb_damage_clips: Optional plane property to mark damaged
647 	 * regions on the plane in framebuffer coordinates of the framebuffer
648 	 * attached to the plane.
649 	 *
650 	 * The layout of blob data is simply an array of &drm_mode_rect. Unlike
651 	 * plane src coordinates, damage clips are not in 16.16 fixed point.
652 	 */
653 	struct drm_property *prop_fb_damage_clips;
654 	/**
655 	 * @prop_active: Default atomic CRTC property to control the active
656 	 * state, which is the simplified implementation for DPMS in atomic
657 	 * drivers.
658 	 */
659 	struct drm_property *prop_active;
660 	/**
661 	 * @prop_mode_id: Default atomic CRTC property to set the mode for a
662 	 * CRTC. A 0 mode implies that the CRTC is entirely disabled - all
663 	 * connectors must be of and active must be set to disabled, too.
664 	 */
665 	struct drm_property *prop_mode_id;
666 	/**
667 	 * @prop_vrr_enabled: Default atomic CRTC property to indicate
668 	 * whether variable refresh rate should be enabled on the CRTC.
669 	 */
670 	struct drm_property *prop_vrr_enabled;
671 
672 	/**
673 	 * @dvi_i_subconnector_property: Optional DVI-I property to
674 	 * differentiate between analog or digital mode.
675 	 */
676 	struct drm_property *dvi_i_subconnector_property;
677 	/**
678 	 * @dvi_i_select_subconnector_property: Optional DVI-I property to
679 	 * select between analog or digital mode.
680 	 */
681 	struct drm_property *dvi_i_select_subconnector_property;
682 
683 	/**
684 	 * @dp_subconnector_property: Optional DP property to differentiate
685 	 * between different DP downstream port types.
686 	 */
687 	struct drm_property *dp_subconnector_property;
688 
689 	/**
690 	 * @tv_subconnector_property: Optional TV property to differentiate
691 	 * between different TV connector types.
692 	 */
693 	struct drm_property *tv_subconnector_property;
694 	/**
695 	 * @tv_select_subconnector_property: Optional TV property to select
696 	 * between different TV connector types.
697 	 */
698 	struct drm_property *tv_select_subconnector_property;
699 	/**
700 	 * @tv_mode_property: Optional TV property to select
701 	 * the output TV mode.
702 	 */
703 	struct drm_property *tv_mode_property;
704 	/**
705 	 * @tv_left_margin_property: Optional TV property to set the left
706 	 * margin (expressed in pixels).
707 	 */
708 	struct drm_property *tv_left_margin_property;
709 	/**
710 	 * @tv_right_margin_property: Optional TV property to set the right
711 	 * margin (expressed in pixels).
712 	 */
713 	struct drm_property *tv_right_margin_property;
714 	/**
715 	 * @tv_top_margin_property: Optional TV property to set the right
716 	 * margin (expressed in pixels).
717 	 */
718 	struct drm_property *tv_top_margin_property;
719 	/**
720 	 * @tv_bottom_margin_property: Optional TV property to set the right
721 	 * margin (expressed in pixels).
722 	 */
723 	struct drm_property *tv_bottom_margin_property;
724 	/**
725 	 * @tv_brightness_property: Optional TV property to set the
726 	 * brightness.
727 	 */
728 	struct drm_property *tv_brightness_property;
729 	/**
730 	 * @tv_contrast_property: Optional TV property to set the
731 	 * contrast.
732 	 */
733 	struct drm_property *tv_contrast_property;
734 	/**
735 	 * @tv_flicker_reduction_property: Optional TV property to control the
736 	 * flicker reduction mode.
737 	 */
738 	struct drm_property *tv_flicker_reduction_property;
739 	/**
740 	 * @tv_overscan_property: Optional TV property to control the overscan
741 	 * setting.
742 	 */
743 	struct drm_property *tv_overscan_property;
744 	/**
745 	 * @tv_saturation_property: Optional TV property to set the
746 	 * saturation.
747 	 */
748 	struct drm_property *tv_saturation_property;
749 	/**
750 	 * @tv_hue_property: Optional TV property to set the hue.
751 	 */
752 	struct drm_property *tv_hue_property;
753 
754 	/**
755 	 * @scaling_mode_property: Optional connector property to control the
756 	 * upscaling, mostly used for built-in panels.
757 	 */
758 	struct drm_property *scaling_mode_property;
759 	/**
760 	 * @aspect_ratio_property: Optional connector property to control the
761 	 * HDMI infoframe aspect ratio setting.
762 	 */
763 	struct drm_property *aspect_ratio_property;
764 	/**
765 	 * @content_type_property: Optional connector property to control the
766 	 * HDMI infoframe content type setting.
767 	 */
768 	struct drm_property *content_type_property;
769 	/**
770 	 * @degamma_lut_property: Optional CRTC property to set the LUT used to
771 	 * convert the framebuffer's colors to linear gamma.
772 	 */
773 	struct drm_property *degamma_lut_property;
774 	/**
775 	 * @degamma_lut_size_property: Optional CRTC property for the size of
776 	 * the degamma LUT as supported by the driver (read-only).
777 	 */
778 	struct drm_property *degamma_lut_size_property;
779 	/**
780 	 * @ctm_property: Optional CRTC property to set the
781 	 * matrix used to convert colors after the lookup in the
782 	 * degamma LUT.
783 	 */
784 	struct drm_property *ctm_property;
785 	/**
786 	 * @gamma_lut_property: Optional CRTC property to set the LUT used to
787 	 * convert the colors, after the CTM matrix, to the gamma space of the
788 	 * connected screen.
789 	 */
790 	struct drm_property *gamma_lut_property;
791 	/**
792 	 * @gamma_lut_size_property: Optional CRTC property for the size of the
793 	 * gamma LUT as supported by the driver (read-only).
794 	 */
795 	struct drm_property *gamma_lut_size_property;
796 
797 	/**
798 	 * @suggested_x_property: Optional connector property with a hint for
799 	 * the position of the output on the host's screen.
800 	 */
801 	struct drm_property *suggested_x_property;
802 	/**
803 	 * @suggested_y_property: Optional connector property with a hint for
804 	 * the position of the output on the host's screen.
805 	 */
806 	struct drm_property *suggested_y_property;
807 
808 	/**
809 	 * @non_desktop_property: Optional connector property with a hint
810 	 * that device isn't a standard display, and the console/desktop,
811 	 * should not be displayed on it.
812 	 */
813 	struct drm_property *non_desktop_property;
814 
815 	/**
816 	 * @panel_orientation_property: Optional connector property indicating
817 	 * how the lcd-panel is mounted inside the casing (e.g. normal or
818 	 * upside-down).
819 	 */
820 	struct drm_property *panel_orientation_property;
821 
822 	/**
823 	 * @writeback_fb_id_property: Property for writeback connectors, storing
824 	 * the ID of the output framebuffer.
825 	 * See also: drm_writeback_connector_init()
826 	 */
827 	struct drm_property *writeback_fb_id_property;
828 
829 	/**
830 	 * @writeback_pixel_formats_property: Property for writeback connectors,
831 	 * storing an array of the supported pixel formats for the writeback
832 	 * engine (read-only).
833 	 * See also: drm_writeback_connector_init()
834 	 */
835 	struct drm_property *writeback_pixel_formats_property;
836 	/**
837 	 * @writeback_out_fence_ptr_property: Property for writeback connectors,
838 	 * fd pointer representing the outgoing fences for a writeback
839 	 * connector. Userspace should provide a pointer to a value of type s32,
840 	 * and then cast that pointer to u64.
841 	 * See also: drm_writeback_connector_init()
842 	 */
843 	struct drm_property *writeback_out_fence_ptr_property;
844 
845 	/**
846 	 * @hdr_output_metadata_property: Connector property containing hdr
847 	 * metatada. This will be provided by userspace compositors based
848 	 * on HDR content
849 	 */
850 	struct drm_property *hdr_output_metadata_property;
851 
852 	/**
853 	 * @content_protection_property: DRM ENUM property for content
854 	 * protection. See drm_connector_attach_content_protection_property().
855 	 */
856 	struct drm_property *content_protection_property;
857 
858 	/**
859 	 * @hdcp_content_type_property: DRM ENUM property for type of
860 	 * Protected Content.
861 	 */
862 	struct drm_property *hdcp_content_type_property;
863 
864 	/* dumb ioctl parameters */
865 	uint32_t preferred_depth, prefer_shadow;
866 
867 	/**
868 	 * @prefer_shadow_fbdev:
869 	 *
870 	 * Hint to framebuffer emulation to prefer shadow-fb rendering.
871 	 */
872 	bool prefer_shadow_fbdev;
873 
874 	/**
875 	 * @fbdev_use_iomem:
876 	 *
877 	 * Set to true if framebuffer reside in iomem.
878 	 * When set to true memcpy_toio() is used when copying the framebuffer in
879 	 * drm_fb_helper.drm_fb_helper_dirty_blit_real().
880 	 *
881 	 * FIXME: This should be replaced with a per-mapping is_iomem
882 	 * flag (like ttm does), and then used everywhere in fbdev code.
883 	 */
884 	bool fbdev_use_iomem;
885 
886 	/**
887 	 * @quirk_addfb_prefer_xbgr_30bpp:
888 	 *
889 	 * Special hack for legacy ADDFB to keep nouveau userspace happy. Should
890 	 * only ever be set by the nouveau kernel driver.
891 	 */
892 	bool quirk_addfb_prefer_xbgr_30bpp;
893 
894 	/**
895 	 * @quirk_addfb_prefer_host_byte_order:
896 	 *
897 	 * When set to true drm_mode_addfb() will pick host byte order
898 	 * pixel_format when calling drm_mode_addfb2().  This is how
899 	 * drm_mode_addfb() should have worked from day one.  It
900 	 * didn't though, so we ended up with quirks in both kernel
901 	 * and userspace drivers to deal with the broken behavior.
902 	 * Simply fixing drm_mode_addfb() unconditionally would break
903 	 * these drivers, so add a quirk bit here to allow drivers
904 	 * opt-in.
905 	 */
906 	bool quirk_addfb_prefer_host_byte_order;
907 
908 	/**
909 	 * @async_page_flip: Does this device support async flips on the primary
910 	 * plane?
911 	 */
912 	bool async_page_flip;
913 
914 	/**
915 	 * @allow_fb_modifiers:
916 	 *
917 	 * Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call.
918 	 */
919 	bool allow_fb_modifiers;
920 
921 	/**
922 	 * @normalize_zpos:
923 	 *
924 	 * If true the drm core will call drm_atomic_normalize_zpos() as part of
925 	 * atomic mode checking from drm_atomic_helper_check()
926 	 */
927 	bool normalize_zpos;
928 
929 	/**
930 	 * @modifiers_property: Plane property to list support modifier/format
931 	 * combination.
932 	 */
933 	struct drm_property *modifiers_property;
934 
935 	/* cursor size */
936 	uint32_t cursor_width, cursor_height;
937 
938 	/**
939 	 * @suspend_state:
940 	 *
941 	 * Atomic state when suspended.
942 	 * Set by drm_mode_config_helper_suspend() and cleared by
943 	 * drm_mode_config_helper_resume().
944 	 */
945 	struct drm_atomic_state *suspend_state;
946 
947 	const struct drm_mode_config_helper_funcs *helper_private;
948 };
949 
950 int __must_check drmm_mode_config_init(struct drm_device *dev);
951 
952 /**
953  * drm_mode_config_init - DRM mode_configuration structure initialization
954  * @dev: DRM device
955  *
956  * This is the unmanaged version of drmm_mode_config_init() for drivers which
957  * still explicitly call drm_mode_config_cleanup().
958  *
959  * FIXME: This function is deprecated and drivers should be converted over to
960  * drmm_mode_config_init().
961  */
drm_mode_config_init(struct drm_device * dev)962 static inline int drm_mode_config_init(struct drm_device *dev)
963 {
964 	return drmm_mode_config_init(dev);
965 }
966 
967 void drm_mode_config_reset(struct drm_device *dev);
968 void drm_mode_config_cleanup(struct drm_device *dev);
969 
970 #endif
971