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
 31#include <drm/drm_modeset_lock.h>
 32
 33struct drm_file;
 34struct drm_device;
 35struct drm_atomic_state;
 36struct drm_mode_fb_cmd2;
 37
 38/**
 39 * struct drm_mode_config_funcs - basic driver provided mode setting functions
 40 *
 41 * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
 42 * involve drivers.
 43 */
 44struct drm_mode_config_funcs {
 45	/**
 46	 * @fb_create:
 47	 *
 48	 * Create a new framebuffer object. The core does basic checks on the
 49	 * requested metadata, but most of that is left to the driver. See
 50	 * struct &drm_mode_fb_cmd2 for details.
 51	 *
 52	 * If the parameters are deemed valid and the backing storage objects in
 53	 * the underlying memory manager all exist, then the driver allocates
 54	 * a new &drm_framebuffer structure, subclassed to contain
 55	 * driver-specific information (like the internal native buffer object
 56	 * references). It also needs to fill out all relevant metadata, which
 57	 * should be done by calling drm_helper_mode_fill_fb_struct().
 58	 *
 59	 * The initialization is finalized by calling drm_framebuffer_init(),
 60	 * which registers the framebuffer and makes it accessible to other
 61	 * threads.
 62	 *
 63	 * RETURNS:
 64	 *
 65	 * A new framebuffer with an initial reference count of 1 or a negative
 66	 * error code encoded with ERR_PTR().
 67	 */
 68	struct drm_framebuffer *(*fb_create)(struct drm_device *dev,
 69					     struct drm_file *file_priv,
 70					     const struct drm_mode_fb_cmd2 *mode_cmd);
 71
 72	/**
 73	 * @output_poll_changed:
 74	 *
 75	 * Callback used by helpers to inform the driver of output configuration
 76	 * changes.
 77	 *
 78	 * Drivers implementing fbdev emulation with the helpers can call
 79	 * drm_fb_helper_hotplug_changed from this hook to inform the fbdev
 80	 * helper of output changes.
 81	 *
 82	 * FIXME:
 83	 *
 84	 * Except that there's no vtable for device-level helper callbacks
 85	 * there's no reason this is a core function.
 86	 */
 87	void (*output_poll_changed)(struct drm_device *dev);
 88
 89	/**
 90	 * @atomic_check:
 91	 *
 92	 * This is the only hook to validate an atomic modeset update. This
 93	 * function must reject any modeset and state changes which the hardware
 94	 * or driver doesn't support. This includes but is of course not limited
 95	 * to:
 96	 *
 97	 *  - Checking that the modes, framebuffers, scaling and placement
 98	 *    requirements and so on are within the limits of the hardware.
 99	 *
100	 *  - Checking that any hidden shared resources are not oversubscribed.
101	 *    This can be shared PLLs, shared lanes, overall memory bandwidth,
102	 *    display fifo space (where shared between planes or maybe even
103	 *    CRTCs).
104	 *
105	 *  - Checking that virtualized resources exported to userspace are not
106	 *    oversubscribed. For various reasons it can make sense to expose
107	 *    more planes, crtcs or encoders than which are physically there. One
108	 *    example is dual-pipe operations (which generally should be hidden
109	 *    from userspace if when lockstepped in hardware, exposed otherwise),
110	 *    where a plane might need 1 hardware plane (if it's just on one
111	 *    pipe), 2 hardware planes (when it spans both pipes) or maybe even
112	 *    shared a hardware plane with a 2nd plane (if there's a compatible
113	 *    plane requested on the area handled by the other pipe).
114	 *
115	 *  - Check that any transitional state is possible and that if
116	 *    requested, the update can indeed be done in the vblank period
117	 *    without temporarily disabling some functions.
118	 *
119	 *  - Check any other constraints the driver or hardware might have.
120	 *
121	 *  - This callback also needs to correctly fill out the &drm_crtc_state
122	 *    in this update to make sure that drm_atomic_crtc_needs_modeset()
123	 *    reflects the nature of the possible update and returns true if and
124	 *    only if the update cannot be applied without tearing within one
125	 *    vblank on that CRTC. The core uses that information to reject
126	 *    updates which require a full modeset (i.e. blanking the screen, or
127	 *    at least pausing updates for a substantial amount of time) if
128	 *    userspace has disallowed that in its request.
129	 *
130	 *  - The driver also does not need to repeat basic input validation
131	 *    like done for the corresponding legacy entry points. The core does
132	 *    that before calling this hook.
133	 *
134	 * See the documentation of @atomic_commit for an exhaustive list of
135	 * error conditions which don't have to be checked at the
136	 * ->atomic_check() stage?
137	 *
138	 * See the documentation for struct &drm_atomic_state for how exactly
139	 * an atomic modeset update is described.
140	 *
141	 * Drivers using the atomic helpers can implement this hook using
142	 * drm_atomic_helper_check(), or one of the exported sub-functions of
143	 * it.
144	 *
145	 * RETURNS:
146	 *
147	 * 0 on success or one of the below negative error codes:
148	 *
149	 *  - -EINVAL, if any of the above constraints are violated.
150	 *
151	 *  - -EDEADLK, when returned from an attempt to acquire an additional
152	 *    &drm_modeset_lock through drm_modeset_lock().
153	 *
154	 *  - -ENOMEM, if allocating additional state sub-structures failed due
155	 *    to lack of memory.
156	 *
157	 *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
158	 *    This can either be due to a pending signal, or because the driver
159	 *    needs to completely bail out to recover from an exceptional
160	 *    situation like a GPU hang. From a userspace point all errors are
161	 *    treated equally.
162	 */
163	int (*atomic_check)(struct drm_device *dev,
164			    struct drm_atomic_state *state);
165
166	/**
167	 * @atomic_commit:
168	 *
169	 * This is the only hook to commit an atomic modeset update. The core
170	 * guarantees that @atomic_check has been called successfully before
171	 * calling this function, and that nothing has been changed in the
172	 * interim.
173	 *
174	 * See the documentation for struct &drm_atomic_state for how exactly
175	 * an atomic modeset update is described.
176	 *
177	 * Drivers using the atomic helpers can implement this hook using
178	 * drm_atomic_helper_commit(), or one of the exported sub-functions of
179	 * it.
180	 *
181	 * Nonblocking commits (as indicated with the nonblock parameter) must
182	 * do any preparatory work which might result in an unsuccessful commit
183	 * in the context of this callback. The only exceptions are hardware
184	 * errors resulting in -EIO. But even in that case the driver must
185	 * ensure that the display pipe is at least running, to avoid
186	 * compositors crashing when pageflips don't work. Anything else,
187	 * specifically committing the update to the hardware, should be done
188	 * without blocking the caller. For updates which do not require a
189	 * modeset this must be guaranteed.
190	 *
191	 * The driver must wait for any pending rendering to the new
192	 * framebuffers to complete before executing the flip. It should also
193	 * wait for any pending rendering from other drivers if the underlying
194	 * buffer is a shared dma-buf. Nonblocking commits must not wait for
195	 * rendering in the context of this callback.
196	 *
197	 * An application can request to be notified when the atomic commit has
198	 * completed. These events are per-CRTC and can be distinguished by the
199	 * CRTC index supplied in &drm_event to userspace.
200	 *
201	 * The drm core will supply a struct &drm_event in the event
202	 * member of each CRTC's &drm_crtc_state structure. See the
203	 * documentation for &drm_crtc_state for more details about the precise
204	 * semantics of this event.
205	 *
206	 * NOTE:
207	 *
208	 * Drivers are not allowed to shut down any display pipe successfully
209	 * enabled through an atomic commit on their own. Doing so can result in
210	 * compositors crashing if a page flip is suddenly rejected because the
211	 * pipe is off.
212	 *
213	 * RETURNS:
214	 *
215	 * 0 on success or one of the below negative error codes:
216	 *
217	 *  - -EBUSY, if a nonblocking updated is requested and there is
218	 *    an earlier updated pending. Drivers are allowed to support a queue
219	 *    of outstanding updates, but currently no driver supports that.
220	 *    Note that drivers must wait for preceding updates to complete if a
221	 *    synchronous update is requested, they are not allowed to fail the
222	 *    commit in that case.
223	 *
224	 *  - -ENOMEM, if the driver failed to allocate memory. Specifically
225	 *    this can happen when trying to pin framebuffers, which must only
226	 *    be done when committing the state.
227	 *
228	 *  - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate
229	 *    that the driver has run out of vram, iommu space or similar GPU
230	 *    address space needed for framebuffer.
231	 *
232	 *  - -EIO, if the hardware completely died.
233	 *
234	 *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
235	 *    This can either be due to a pending signal, or because the driver
236	 *    needs to completely bail out to recover from an exceptional
237	 *    situation like a GPU hang. From a userspace point of view all errors are
238	 *    treated equally.
239	 *
240	 * This list is exhaustive. Specifically this hook is not allowed to
241	 * return -EINVAL (any invalid requests should be caught in
242	 * @atomic_check) or -EDEADLK (this function must not acquire
243	 * additional modeset locks).
244	 */
245	int (*atomic_commit)(struct drm_device *dev,
246			     struct drm_atomic_state *state,
247			     bool nonblock);
248
249	/**
250	 * @atomic_state_alloc:
251	 *
252	 * This optional hook can be used by drivers that want to subclass struct
253	 * &drm_atomic_state to be able to track their own driver-private global
254	 * state easily. If this hook is implemented, drivers must also
255	 * implement @atomic_state_clear and @atomic_state_free.
256	 *
257	 * RETURNS:
258	 *
259	 * A new &drm_atomic_state on success or NULL on failure.
260	 */
261	struct drm_atomic_state *(*atomic_state_alloc)(struct drm_device *dev);
262
263	/**
264	 * @atomic_state_clear:
265	 *
266	 * This hook must clear any driver private state duplicated into the
267	 * passed-in &drm_atomic_state. This hook is called when the caller
268	 * encountered a &drm_modeset_lock deadlock and needs to drop all
269	 * already acquired locks as part of the deadlock avoidance dance
270	 * implemented in drm_modeset_lock_backoff().
271	 *
272	 * Any duplicated state must be invalidated since a concurrent atomic
273	 * update might change it, and the drm atomic interfaces always apply
274	 * updates as relative changes to the current state.
275	 *
276	 * Drivers that implement this must call drm_atomic_state_default_clear()
277	 * to clear common state.
278	 */
279	void (*atomic_state_clear)(struct drm_atomic_state *state);
280
281	/**
282	 * @atomic_state_free:
283	 *
284	 * This hook needs driver private resources and the &drm_atomic_state
285	 * itself. Note that the core first calls drm_atomic_state_clear() to
286	 * avoid code duplicate between the clear and free hooks.
287	 *
288	 * Drivers that implement this must call drm_atomic_state_default_free()
289	 * to release common resources.
290	 */
291	void (*atomic_state_free)(struct drm_atomic_state *state);
292};
293
294/**
295 * struct drm_mode_config - Mode configuration control structure
296 * @mutex: mutex protecting KMS related lists and structures
297 * @connection_mutex: ww mutex protecting connector state and routing
298 * @acquire_ctx: global implicit acquire context used by atomic drivers for
299 * 	legacy IOCTLs
300 * @fb_lock: mutex to protect fb state and lists
301 * @num_fb: number of fbs available
302 * @fb_list: list of framebuffers available
303 * @num_encoder: number of encoders on this device
304 * @encoder_list: list of encoder objects
305 * @num_overlay_plane: number of overlay planes on this device
306 * @num_total_plane: number of universal (i.e. with primary/curso) planes on this device
307 * @plane_list: list of plane objects
308 * @num_crtc: number of CRTCs on this device
309 * @crtc_list: list of CRTC objects
310 * @property_list: list of property objects
311 * @min_width: minimum pixel width on this device
312 * @min_height: minimum pixel height on this device
313 * @max_width: maximum pixel width on this device
314 * @max_height: maximum pixel height on this device
315 * @funcs: core driver provided mode setting functions
316 * @fb_base: base address of the framebuffer
317 * @poll_enabled: track polling support for this device
318 * @poll_running: track polling status for this device
319 * @delayed_event: track delayed poll uevent deliver for this device
320 * @output_poll_work: delayed work for polling in process context
321 * @property_blob_list: list of all the blob property objects
322 * @blob_lock: mutex for blob property allocation and management
323 * @*_property: core property tracking
324 * @preferred_depth: preferred RBG pixel depth, used by fb helpers
325 * @prefer_shadow: hint to userspace to prefer shadow-fb rendering
326 * @cursor_width: hint to userspace for max cursor width
327 * @cursor_height: hint to userspace for max cursor height
328 * @helper_private: mid-layer private data
329 *
330 * Core mode resource tracking structure.  All CRTC, encoders, and connectors
331 * enumerated by the driver are added here, as are global properties.  Some
332 * global restrictions are also here, e.g. dimension restrictions.
333 */
334struct drm_mode_config {
335	struct mutex mutex; /* protects configuration (mode lists etc.) */
336	struct drm_modeset_lock connection_mutex; /* protects connector->encoder and encoder->crtc links */
337	struct drm_modeset_acquire_ctx *acquire_ctx; /* for legacy _lock_all() / _unlock_all() */
338
339	/**
340	 * @idr_mutex:
341	 *
342	 * Mutex for KMS ID allocation and management. Protects both @crtc_idr
343	 * and @tile_idr.
344	 */
345	struct mutex idr_mutex;
346
347	/**
348	 * @crtc_idr:
349	 *
350	 * Main KMS ID tracking object. Use this idr for all IDs, fb, crtc,
351	 * connector, modes - just makes life easier to have only one.
352	 */
353	struct idr crtc_idr;
354
355	/**
356	 * @tile_idr:
357	 *
358	 * Use this idr for allocating new IDs for tiled sinks like use in some
359	 * high-res DP MST screens.
360	 */
361	struct idr tile_idr;
362
363	struct mutex fb_lock; /* proctects global and per-file fb lists */
364	int num_fb;
365	struct list_head fb_list;
366
367	/**
368	 * @num_connector: Number of connectors on this device.
369	 */
370	int num_connector;
371	/**
372	 * @connector_ida: ID allocator for connector indices.
373	 */
374	struct ida connector_ida;
375	/**
376	 * @connector_list: List of connector objects.
377	 */
378	struct list_head connector_list;
379	int num_encoder;
380	struct list_head encoder_list;
381
382	/*
383	 * Track # of overlay planes separately from # of total planes.  By
384	 * default we only advertise overlay planes to userspace; if userspace
385	 * sets the "universal plane" capability bit, we'll go ahead and
386	 * expose all planes.
387	 */
388	int num_overlay_plane;
389	int num_total_plane;
390	struct list_head plane_list;
391
392	int num_crtc;
393	struct list_head crtc_list;
394
395	struct list_head property_list;
396
397	int min_width, min_height;
398	int max_width, max_height;
399	const struct drm_mode_config_funcs *funcs;
400	resource_size_t fb_base;
401
402	/* output poll support */
403	bool poll_enabled;
404	bool poll_running;
405	bool delayed_event;
406	struct delayed_work output_poll_work;
407
408	struct mutex blob_lock;
409
410	/* pointers to standard properties */
411	struct list_head property_blob_list;
412	/**
413	 * @edid_property: Default connector property to hold the EDID of the
414	 * currently connected sink, if any.
415	 */
416	struct drm_property *edid_property;
417	/**
418	 * @dpms_property: Default connector property to control the
419	 * connector's DPMS state.
420	 */
421	struct drm_property *dpms_property;
422	/**
423	 * @path_property: Default connector property to hold the DP MST path
424	 * for the port.
425	 */
426	struct drm_property *path_property;
427	/**
428	 * @tile_property: Default connector property to store the tile
429	 * position of a tiled screen, for sinks which need to be driven with
430	 * multiple CRTCs.
431	 */
432	struct drm_property *tile_property;
433	/**
434	 * @plane_type_property: Default plane property to differentiate
435	 * CURSOR, PRIMARY and OVERLAY legacy uses of planes.
436	 */
437	struct drm_property *plane_type_property;
438	/**
439	 * @prop_src_x: Default atomic plane property for the plane source
440	 * position in the connected &drm_framebuffer.
441	 */
442	struct drm_property *prop_src_x;
443	/**
444	 * @prop_src_y: Default atomic plane property for the plane source
445	 * position in the connected &drm_framebuffer.
446	 */
447	struct drm_property *prop_src_y;
448	/**
449	 * @prop_src_w: Default atomic plane property for the plane source
450	 * position in the connected &drm_framebuffer.
451	 */
452	struct drm_property *prop_src_w;
453	/**
454	 * @prop_src_h: Default atomic plane property for the plane source
455	 * position in the connected &drm_framebuffer.
456	 */
457	struct drm_property *prop_src_h;
458	/**
459	 * @prop_crtc_x: Default atomic plane property for the plane destination
460	 * position in the &drm_crtc is is being shown on.
461	 */
462	struct drm_property *prop_crtc_x;
463	/**
464	 * @prop_crtc_y: Default atomic plane property for the plane destination
465	 * position in the &drm_crtc is is being shown on.
466	 */
467	struct drm_property *prop_crtc_y;
468	/**
469	 * @prop_crtc_w: Default atomic plane property for the plane destination
470	 * position in the &drm_crtc is is being shown on.
471	 */
472	struct drm_property *prop_crtc_w;
473	/**
474	 * @prop_crtc_h: Default atomic plane property for the plane destination
475	 * position in the &drm_crtc is is being shown on.
476	 */
477	struct drm_property *prop_crtc_h;
478	/**
479	 * @prop_fb_id: Default atomic plane property to specify the
480	 * &drm_framebuffer.
481	 */
482	struct drm_property *prop_fb_id;
483	/**
484	 * @prop_in_fence_fd: Sync File fd representing the incoming fences
485	 * for a Plane.
486	 */
487	struct drm_property *prop_in_fence_fd;
488	/**
489	 * @prop_out_fence_ptr: Sync File fd pointer representing the
490	 * outgoing fences for a CRTC. Userspace should provide a pointer to a
491	 * value of type s32, and then cast that pointer to u64.
492	 */
493	struct drm_property *prop_out_fence_ptr;
494	/**
495	 * @prop_crtc_id: Default atomic plane property to specify the
496	 * &drm_crtc.
497	 */
498	struct drm_property *prop_crtc_id;
499	/**
500	 * @prop_active: Default atomic CRTC property to control the active
501	 * state, which is the simplified implementation for DPMS in atomic
502	 * drivers.
503	 */
504	struct drm_property *prop_active;
505	/**
506	 * @prop_mode_id: Default atomic CRTC property to set the mode for a
507	 * CRTC. A 0 mode implies that the CRTC is entirely disabled - all
508	 * connectors must be of and active must be set to disabled, too.
509	 */
510	struct drm_property *prop_mode_id;
511
512	/**
513	 * @dvi_i_subconnector_property: Optional DVI-I property to
514	 * differentiate between analog or digital mode.
515	 */
516	struct drm_property *dvi_i_subconnector_property;
517	/**
518	 * @dvi_i_select_subconnector_property: Optional DVI-I property to
519	 * select between analog or digital mode.
520	 */
521	struct drm_property *dvi_i_select_subconnector_property;
522
523	/**
524	 * @tv_subconnector_property: Optional TV property to differentiate
525	 * between different TV connector types.
526	 */
527	struct drm_property *tv_subconnector_property;
528	/**
529	 * @tv_select_subconnector_property: Optional TV property to select
530	 * between different TV connector types.
531	 */
532	struct drm_property *tv_select_subconnector_property;
533	/**
534	 * @tv_mode_property: Optional TV property to select
535	 * the output TV mode.
536	 */
537	struct drm_property *tv_mode_property;
538	/**
539	 * @tv_left_margin_property: Optional TV property to set the left
540	 * margin.
541	 */
542	struct drm_property *tv_left_margin_property;
543	/**
544	 * @tv_right_margin_property: Optional TV property to set the right
545	 * margin.
546	 */
547	struct drm_property *tv_right_margin_property;
548	/**
549	 * @tv_top_margin_property: Optional TV property to set the right
550	 * margin.
551	 */
552	struct drm_property *tv_top_margin_property;
553	/**
554	 * @tv_bottom_margin_property: Optional TV property to set the right
555	 * margin.
556	 */
557	struct drm_property *tv_bottom_margin_property;
558	/**
559	 * @tv_brightness_property: Optional TV property to set the
560	 * brightness.
561	 */
562	struct drm_property *tv_brightness_property;
563	/**
564	 * @tv_contrast_property: Optional TV property to set the
565	 * contrast.
566	 */
567	struct drm_property *tv_contrast_property;
568	/**
569	 * @tv_flicker_reduction_property: Optional TV property to control the
570	 * flicker reduction mode.
571	 */
572	struct drm_property *tv_flicker_reduction_property;
573	/**
574	 * @tv_overscan_property: Optional TV property to control the overscan
575	 * setting.
576	 */
577	struct drm_property *tv_overscan_property;
578	/**
579	 * @tv_saturation_property: Optional TV property to set the
580	 * saturation.
581	 */
582	struct drm_property *tv_saturation_property;
583	/**
584	 * @tv_hue_property: Optional TV property to set the hue.
585	 */
586	struct drm_property *tv_hue_property;
587
588	/**
589	 * @scaling_mode_property: Optional connector property to control the
590	 * upscaling, mostly used for built-in panels.
591	 */
592	struct drm_property *scaling_mode_property;
593	/**
594	 * @aspect_ratio_property: Optional connector property to control the
595	 * HDMI infoframe aspect ratio setting.
596	 */
597	struct drm_property *aspect_ratio_property;
598	/**
599	 * @degamma_lut_property: Optional CRTC property to set the LUT used to
600	 * convert the framebuffer's colors to linear gamma.
601	 */
602	struct drm_property *degamma_lut_property;
603	/**
604	 * @degamma_lut_size_property: Optional CRTC property for the size of
605	 * the degamma LUT as supported by the driver (read-only).
606	 */
607	struct drm_property *degamma_lut_size_property;
608	/**
609	 * @ctm_property: Optional CRTC property to set the
610	 * matrix used to convert colors after the lookup in the
611	 * degamma LUT.
612	 */
613	struct drm_property *ctm_property;
614	/**
615	 * @gamma_lut_property: Optional CRTC property to set the LUT used to
616	 * convert the colors, after the CTM matrix, to the gamma space of the
617	 * connected screen.
618	 */
619	struct drm_property *gamma_lut_property;
620	/**
621	 * @gamma_lut_size_property: Optional CRTC property for the size of the
622	 * gamma LUT as supported by the driver (read-only).
623	 */
624	struct drm_property *gamma_lut_size_property;
625
626	/**
627	 * @suggested_x_property: Optional connector property with a hint for
628	 * the position of the output on the host's screen.
629	 */
630	struct drm_property *suggested_x_property;
631	/**
632	 * @suggested_y_property: Optional connector property with a hint for
633	 * the position of the output on the host's screen.
634	 */
635	struct drm_property *suggested_y_property;
636
637	/* dumb ioctl parameters */
638	uint32_t preferred_depth, prefer_shadow;
639
640	/**
641	 * @async_page_flip: Does this device support async flips on the primary
642	 * plane?
643	 */
644	bool async_page_flip;
645
646	/**
647	 * @allow_fb_modifiers:
648	 *
649	 * Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call.
650	 */
651	bool allow_fb_modifiers;
652
653	/* cursor size */
654	uint32_t cursor_width, cursor_height;
655
656	struct drm_mode_config_helper_funcs *helper_private;
657};
658
659void drm_mode_config_init(struct drm_device *dev);
660void drm_mode_config_reset(struct drm_device *dev);
661void drm_mode_config_cleanup(struct drm_device *dev);
662
663#endif