xref: /openbmc/linux/include/drm/drm_crtc.h (revision 6774def6)
1 /*
2  * Copyright © 2006 Keith Packard
3  * Copyright © 2007-2008 Dave Airlie
4  * Copyright © 2007-2008 Intel Corporation
5  *   Jesse Barnes <jesse.barnes@intel.com>
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  */
25 #ifndef __DRM_CRTC_H__
26 #define __DRM_CRTC_H__
27 
28 #include <linux/i2c.h>
29 #include <linux/spinlock.h>
30 #include <linux/types.h>
31 #include <linux/idr.h>
32 #include <linux/fb.h>
33 #include <linux/hdmi.h>
34 #include <uapi/drm/drm_mode.h>
35 #include <uapi/drm/drm_fourcc.h>
36 #include <drm/drm_modeset_lock.h>
37 
38 struct drm_device;
39 struct drm_mode_set;
40 struct drm_framebuffer;
41 struct drm_object_properties;
42 struct drm_file;
43 struct drm_clip_rect;
44 struct device_node;
45 
46 #define DRM_MODE_OBJECT_CRTC 0xcccccccc
47 #define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
48 #define DRM_MODE_OBJECT_ENCODER 0xe0e0e0e0
49 #define DRM_MODE_OBJECT_MODE 0xdededede
50 #define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
51 #define DRM_MODE_OBJECT_FB 0xfbfbfbfb
52 #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
53 #define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
54 #define DRM_MODE_OBJECT_BRIDGE 0xbdbdbdbd
55 #define DRM_MODE_OBJECT_ANY 0
56 
57 struct drm_mode_object {
58 	uint32_t id;
59 	uint32_t type;
60 	struct drm_object_properties *properties;
61 };
62 
63 #define DRM_OBJECT_MAX_PROPERTY 24
64 struct drm_object_properties {
65 	int count;
66 	uint32_t ids[DRM_OBJECT_MAX_PROPERTY];
67 	uint64_t values[DRM_OBJECT_MAX_PROPERTY];
68 };
69 
70 static inline int64_t U642I64(uint64_t val)
71 {
72 	return (int64_t)*((int64_t *)&val);
73 }
74 static inline uint64_t I642U64(int64_t val)
75 {
76 	return (uint64_t)*((uint64_t *)&val);
77 }
78 
79 /* rotation property bits */
80 #define DRM_ROTATE_0	0
81 #define DRM_ROTATE_90	1
82 #define DRM_ROTATE_180	2
83 #define DRM_ROTATE_270	3
84 #define DRM_REFLECT_X	4
85 #define DRM_REFLECT_Y	5
86 
87 enum drm_connector_force {
88 	DRM_FORCE_UNSPECIFIED,
89 	DRM_FORCE_OFF,
90 	DRM_FORCE_ON,         /* force on analog part normally */
91 	DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
92 };
93 
94 #include <drm/drm_modes.h>
95 
96 enum drm_connector_status {
97 	connector_status_connected = 1,
98 	connector_status_disconnected = 2,
99 	connector_status_unknown = 3,
100 };
101 
102 enum subpixel_order {
103 	SubPixelUnknown = 0,
104 	SubPixelHorizontalRGB,
105 	SubPixelHorizontalBGR,
106 	SubPixelVerticalRGB,
107 	SubPixelVerticalBGR,
108 	SubPixelNone,
109 };
110 
111 #define DRM_COLOR_FORMAT_RGB444		(1<<0)
112 #define DRM_COLOR_FORMAT_YCRCB444	(1<<1)
113 #define DRM_COLOR_FORMAT_YCRCB422	(1<<2)
114 /*
115  * Describes a given display (e.g. CRT or flat panel) and its limitations.
116  */
117 struct drm_display_info {
118 	char name[DRM_DISPLAY_INFO_LEN];
119 
120 	/* Physical size */
121         unsigned int width_mm;
122 	unsigned int height_mm;
123 
124 	/* Clock limits FIXME: storage format */
125 	unsigned int min_vfreq, max_vfreq;
126 	unsigned int min_hfreq, max_hfreq;
127 	unsigned int pixel_clock;
128 	unsigned int bpc;
129 
130 	enum subpixel_order subpixel_order;
131 	u32 color_formats;
132 
133 	/* Mask of supported hdmi deep color modes */
134 	u8 edid_hdmi_dc_modes;
135 
136 	u8 cea_rev;
137 };
138 
139 struct drm_framebuffer_funcs {
140 	/* note: use drm_framebuffer_remove() */
141 	void (*destroy)(struct drm_framebuffer *framebuffer);
142 	int (*create_handle)(struct drm_framebuffer *fb,
143 			     struct drm_file *file_priv,
144 			     unsigned int *handle);
145 	/**
146 	 * Optinal callback for the dirty fb ioctl.
147 	 *
148 	 * Userspace can notify the driver via this callback
149 	 * that a area of the framebuffer has changed and should
150 	 * be flushed to the display hardware.
151 	 *
152 	 * See documentation in drm_mode.h for the struct
153 	 * drm_mode_fb_dirty_cmd for more information as all
154 	 * the semantics and arguments have a one to one mapping
155 	 * on this function.
156 	 */
157 	int (*dirty)(struct drm_framebuffer *framebuffer,
158 		     struct drm_file *file_priv, unsigned flags,
159 		     unsigned color, struct drm_clip_rect *clips,
160 		     unsigned num_clips);
161 };
162 
163 struct drm_framebuffer {
164 	struct drm_device *dev;
165 	/*
166 	 * Note that the fb is refcounted for the benefit of driver internals,
167 	 * for example some hw, disabling a CRTC/plane is asynchronous, and
168 	 * scanout does not actually complete until the next vblank.  So some
169 	 * cleanup (like releasing the reference(s) on the backing GEM bo(s))
170 	 * should be deferred.  In cases like this, the driver would like to
171 	 * hold a ref to the fb even though it has already been removed from
172 	 * userspace perspective.
173 	 */
174 	struct kref refcount;
175 	/*
176 	 * Place on the dev->mode_config.fb_list, access protected by
177 	 * dev->mode_config.fb_lock.
178 	 */
179 	struct list_head head;
180 	struct drm_mode_object base;
181 	const struct drm_framebuffer_funcs *funcs;
182 	unsigned int pitches[4];
183 	unsigned int offsets[4];
184 	unsigned int width;
185 	unsigned int height;
186 	/* depth can be 15 or 16 */
187 	unsigned int depth;
188 	int bits_per_pixel;
189 	int flags;
190 	uint32_t pixel_format; /* fourcc format */
191 	struct list_head filp_head;
192 	/* if you are using the helper */
193 	void *helper_private;
194 };
195 
196 struct drm_property_blob {
197 	struct drm_mode_object base;
198 	struct list_head head;
199 	unsigned int length;
200 	unsigned char data[];
201 };
202 
203 struct drm_property_enum {
204 	uint64_t value;
205 	struct list_head head;
206 	char name[DRM_PROP_NAME_LEN];
207 };
208 
209 struct drm_property {
210 	struct list_head head;
211 	struct drm_mode_object base;
212 	uint32_t flags;
213 	char name[DRM_PROP_NAME_LEN];
214 	uint32_t num_values;
215 	uint64_t *values;
216 	struct drm_device *dev;
217 
218 	struct list_head enum_blob_list;
219 };
220 
221 struct drm_crtc;
222 struct drm_connector;
223 struct drm_encoder;
224 struct drm_pending_vblank_event;
225 struct drm_plane;
226 struct drm_bridge;
227 
228 /**
229  * drm_crtc_funcs - control CRTCs for a given device
230  * @save: save CRTC state
231  * @restore: restore CRTC state
232  * @reset: reset CRTC after state has been invalidated (e.g. resume)
233  * @cursor_set: setup the cursor
234  * @cursor_move: move the cursor
235  * @gamma_set: specify color ramp for CRTC
236  * @destroy: deinit and free object
237  * @set_property: called when a property is changed
238  * @set_config: apply a new CRTC configuration
239  * @page_flip: initiate a page flip
240  *
241  * The drm_crtc_funcs structure is the central CRTC management structure
242  * in the DRM.  Each CRTC controls one or more connectors (note that the name
243  * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc.
244  * connectors, not just CRTs).
245  *
246  * Each driver is responsible for filling out this structure at startup time,
247  * in addition to providing other modesetting features, like i2c and DDC
248  * bus accessors.
249  */
250 struct drm_crtc_funcs {
251 	/* Save CRTC state */
252 	void (*save)(struct drm_crtc *crtc); /* suspend? */
253 	/* Restore CRTC state */
254 	void (*restore)(struct drm_crtc *crtc); /* resume? */
255 	/* Reset CRTC state */
256 	void (*reset)(struct drm_crtc *crtc);
257 
258 	/* cursor controls */
259 	int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv,
260 			  uint32_t handle, uint32_t width, uint32_t height);
261 	int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv,
262 			   uint32_t handle, uint32_t width, uint32_t height,
263 			   int32_t hot_x, int32_t hot_y);
264 	int (*cursor_move)(struct drm_crtc *crtc, int x, int y);
265 
266 	/* Set gamma on the CRTC */
267 	void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
268 			  uint32_t start, uint32_t size);
269 	/* Object destroy routine */
270 	void (*destroy)(struct drm_crtc *crtc);
271 
272 	int (*set_config)(struct drm_mode_set *set);
273 
274 	/*
275 	 * Flip to the given framebuffer.  This implements the page
276 	 * flip ioctl described in drm_mode.h, specifically, the
277 	 * implementation must return immediately and block all
278 	 * rendering to the current fb until the flip has completed.
279 	 * If userspace set the event flag in the ioctl, the event
280 	 * argument will point to an event to send back when the flip
281 	 * completes, otherwise it will be NULL.
282 	 */
283 	int (*page_flip)(struct drm_crtc *crtc,
284 			 struct drm_framebuffer *fb,
285 			 struct drm_pending_vblank_event *event,
286 			 uint32_t flags);
287 
288 	int (*set_property)(struct drm_crtc *crtc,
289 			    struct drm_property *property, uint64_t val);
290 };
291 
292 /**
293  * drm_crtc - central CRTC control structure
294  * @dev: parent DRM device
295  * @head: list management
296  * @mutex: per-CRTC locking
297  * @base: base KMS object for ID tracking etc.
298  * @primary: primary plane for this CRTC
299  * @cursor: cursor plane for this CRTC
300  * @enabled: is this CRTC enabled?
301  * @mode: current mode timings
302  * @hwmode: mode timings as programmed to hw regs
303  * @invert_dimensions: for purposes of error checking crtc vs fb sizes,
304  *    invert the width/height of the crtc.  This is used if the driver
305  *    is performing 90 or 270 degree rotated scanout
306  * @x: x position on screen
307  * @y: y position on screen
308  * @funcs: CRTC control functions
309  * @gamma_size: size of gamma ramp
310  * @gamma_store: gamma ramp values
311  * @framedur_ns: precise frame timing
312  * @framedur_ns: precise line timing
313  * @pixeldur_ns: precise pixel timing
314  * @helper_private: mid-layer private data
315  * @properties: property tracking for this CRTC
316  *
317  * Each CRTC may have one or more connectors associated with it.  This structure
318  * allows the CRTC to be controlled.
319  */
320 struct drm_crtc {
321 	struct drm_device *dev;
322 	struct device_node *port;
323 	struct list_head head;
324 
325 	/**
326 	 * crtc mutex
327 	 *
328 	 * This provides a read lock for the overall crtc state (mode, dpms
329 	 * state, ...) and a write lock for everything which can be update
330 	 * without a full modeset (fb, cursor data, ...)
331 	 */
332 	struct drm_modeset_lock mutex;
333 
334 	struct drm_mode_object base;
335 
336 	/* primary and cursor planes for CRTC */
337 	struct drm_plane *primary;
338 	struct drm_plane *cursor;
339 
340 	/* position of cursor plane on crtc */
341 	int cursor_x;
342 	int cursor_y;
343 
344 	bool enabled;
345 
346 	/* Requested mode from modesetting. */
347 	struct drm_display_mode mode;
348 
349 	/* Programmed mode in hw, after adjustments for encoders,
350 	 * crtc, panel scaling etc. Needed for timestamping etc.
351 	 */
352 	struct drm_display_mode hwmode;
353 
354 	bool invert_dimensions;
355 
356 	int x, y;
357 	const struct drm_crtc_funcs *funcs;
358 
359 	/* CRTC gamma size for reporting to userspace */
360 	uint32_t gamma_size;
361 	uint16_t *gamma_store;
362 
363 	/* Constants needed for precise vblank and swap timestamping. */
364 	int framedur_ns, linedur_ns, pixeldur_ns;
365 
366 	/* if you are using the helper */
367 	void *helper_private;
368 
369 	struct drm_object_properties properties;
370 
371 	/*
372 	 * For legacy crtc ioctls so that atomic drivers can get at the locking
373 	 * acquire context.
374 	 */
375 	struct drm_modeset_acquire_ctx *acquire_ctx;
376 };
377 
378 
379 /**
380  * drm_connector_funcs - control connectors on a given device
381  * @dpms: set power state (see drm_crtc_funcs above)
382  * @save: save connector state
383  * @restore: restore connector state
384  * @reset: reset connector after state has been invalidated (e.g. resume)
385  * @detect: is this connector active?
386  * @fill_modes: fill mode list for this connector
387  * @set_property: property for this connector may need an update
388  * @destroy: make object go away
389  * @force: notify the driver that the connector is forced on
390  *
391  * Each CRTC may have one or more connectors attached to it.  The functions
392  * below allow the core DRM code to control connectors, enumerate available modes,
393  * etc.
394  */
395 struct drm_connector_funcs {
396 	void (*dpms)(struct drm_connector *connector, int mode);
397 	void (*save)(struct drm_connector *connector);
398 	void (*restore)(struct drm_connector *connector);
399 	void (*reset)(struct drm_connector *connector);
400 
401 	/* Check to see if anything is attached to the connector.
402 	 * @force is set to false whilst polling, true when checking the
403 	 * connector due to user request. @force can be used by the driver
404 	 * to avoid expensive, destructive operations during automated
405 	 * probing.
406 	 */
407 	enum drm_connector_status (*detect)(struct drm_connector *connector,
408 					    bool force);
409 	int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
410 	int (*set_property)(struct drm_connector *connector, struct drm_property *property,
411 			     uint64_t val);
412 	void (*destroy)(struct drm_connector *connector);
413 	void (*force)(struct drm_connector *connector);
414 };
415 
416 /**
417  * drm_encoder_funcs - encoder controls
418  * @reset: reset state (e.g. at init or resume time)
419  * @destroy: cleanup and free associated data
420  *
421  * Encoders sit between CRTCs and connectors.
422  */
423 struct drm_encoder_funcs {
424 	void (*reset)(struct drm_encoder *encoder);
425 	void (*destroy)(struct drm_encoder *encoder);
426 };
427 
428 #define DRM_CONNECTOR_MAX_ENCODER 3
429 
430 /**
431  * drm_encoder - central DRM encoder structure
432  * @dev: parent DRM device
433  * @head: list management
434  * @base: base KMS object
435  * @name: encoder name
436  * @encoder_type: one of the %DRM_MODE_ENCODER_<foo> types in drm_mode.h
437  * @possible_crtcs: bitmask of potential CRTC bindings
438  * @possible_clones: bitmask of potential sibling encoders for cloning
439  * @crtc: currently bound CRTC
440  * @bridge: bridge associated to the encoder
441  * @funcs: control functions
442  * @helper_private: mid-layer private data
443  *
444  * CRTCs drive pixels to encoders, which convert them into signals
445  * appropriate for a given connector or set of connectors.
446  */
447 struct drm_encoder {
448 	struct drm_device *dev;
449 	struct list_head head;
450 
451 	struct drm_mode_object base;
452 	char *name;
453 	int encoder_type;
454 	uint32_t possible_crtcs;
455 	uint32_t possible_clones;
456 
457 	struct drm_crtc *crtc;
458 	struct drm_bridge *bridge;
459 	const struct drm_encoder_funcs *funcs;
460 	void *helper_private;
461 };
462 
463 /* should we poll this connector for connects and disconnects */
464 /* hot plug detectable */
465 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
466 /* poll for connections */
467 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
468 /* can cleanly poll for disconnections without flickering the screen */
469 /* DACs should rarely do this without a lot of testing */
470 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
471 
472 #define MAX_ELD_BYTES	128
473 
474 /**
475  * drm_connector - central DRM connector control structure
476  * @dev: parent DRM device
477  * @kdev: kernel device for sysfs attributes
478  * @attr: sysfs attributes
479  * @head: list management
480  * @base: base KMS object
481  * @name: connector name
482  * @connector_type: one of the %DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
483  * @connector_type_id: index into connector type enum
484  * @interlace_allowed: can this connector handle interlaced modes?
485  * @doublescan_allowed: can this connector handle doublescan?
486  * @modes: modes available on this connector (from fill_modes() + user)
487  * @status: one of the drm_connector_status enums (connected, not, or unknown)
488  * @probed_modes: list of modes derived directly from the display
489  * @display_info: information about attached display (e.g. from EDID)
490  * @funcs: connector control functions
491  * @edid_blob_ptr: DRM property containing EDID if present
492  * @properties: property tracking for this connector
493  * @polled: a %DRM_CONNECTOR_POLL_<foo> value for core driven polling
494  * @dpms: current dpms state
495  * @helper_private: mid-layer private data
496  * @force: a %DRM_FORCE_<foo> state for forced mode sets
497  * @encoder_ids: valid encoders for this connector
498  * @encoder: encoder driving this connector, if any
499  * @eld: EDID-like data, if present
500  * @dvi_dual: dual link DVI, if found
501  * @max_tmds_clock: max clock rate, if found
502  * @latency_present: AV delay info from ELD, if found
503  * @video_latency: video latency info from ELD, if found
504  * @audio_latency: audio latency info from ELD, if found
505  * @null_edid_counter: track sinks that give us all zeros for the EDID
506  *
507  * Each connector may be connected to one or more CRTCs, or may be clonable by
508  * another connector if they can share a CRTC.  Each connector also has a specific
509  * position in the broader display (referred to as a 'screen' though it could
510  * span multiple monitors).
511  */
512 struct drm_connector {
513 	struct drm_device *dev;
514 	struct device *kdev;
515 	struct device_attribute *attr;
516 	struct list_head head;
517 
518 	struct drm_mode_object base;
519 
520 	char *name;
521 	int connector_type;
522 	int connector_type_id;
523 	bool interlace_allowed;
524 	bool doublescan_allowed;
525 	bool stereo_allowed;
526 	struct list_head modes; /* list of modes on this connector */
527 
528 	enum drm_connector_status status;
529 
530 	/* these are modes added by probing with DDC or the BIOS */
531 	struct list_head probed_modes;
532 
533 	struct drm_display_info display_info;
534 	const struct drm_connector_funcs *funcs;
535 
536 	struct drm_property_blob *edid_blob_ptr;
537 	struct drm_object_properties properties;
538 
539 	struct drm_property_blob *path_blob_ptr;
540 
541 	uint8_t polled; /* DRM_CONNECTOR_POLL_* */
542 
543 	/* requested DPMS state */
544 	int dpms;
545 
546 	void *helper_private;
547 
548 	/* forced on connector */
549 	struct drm_cmdline_mode cmdline_mode;
550 	enum drm_connector_force force;
551 	bool override_edid;
552 	uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
553 	struct drm_encoder *encoder; /* currently active encoder */
554 
555 	/* EDID bits */
556 	uint8_t eld[MAX_ELD_BYTES];
557 	bool dvi_dual;
558 	int max_tmds_clock;	/* in MHz */
559 	bool latency_present[2];
560 	int video_latency[2];	/* [0]: progressive, [1]: interlaced */
561 	int audio_latency[2];
562 	int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
563 	unsigned bad_edid_counter;
564 
565 	struct dentry *debugfs_entry;
566 };
567 
568 /**
569  * drm_plane_funcs - driver plane control functions
570  * @update_plane: update the plane configuration
571  * @disable_plane: shut down the plane
572  * @destroy: clean up plane resources
573  * @set_property: called when a property is changed
574  */
575 struct drm_plane_funcs {
576 	int (*update_plane)(struct drm_plane *plane,
577 			    struct drm_crtc *crtc, struct drm_framebuffer *fb,
578 			    int crtc_x, int crtc_y,
579 			    unsigned int crtc_w, unsigned int crtc_h,
580 			    uint32_t src_x, uint32_t src_y,
581 			    uint32_t src_w, uint32_t src_h);
582 	int (*disable_plane)(struct drm_plane *plane);
583 	void (*destroy)(struct drm_plane *plane);
584 	void (*reset)(struct drm_plane *plane);
585 
586 	int (*set_property)(struct drm_plane *plane,
587 			    struct drm_property *property, uint64_t val);
588 };
589 
590 enum drm_plane_type {
591 	DRM_PLANE_TYPE_OVERLAY,
592 	DRM_PLANE_TYPE_PRIMARY,
593 	DRM_PLANE_TYPE_CURSOR,
594 };
595 
596 /**
597  * drm_plane - central DRM plane control structure
598  * @dev: DRM device this plane belongs to
599  * @head: for list management
600  * @base: base mode object
601  * @possible_crtcs: pipes this plane can be bound to
602  * @format_types: array of formats supported by this plane
603  * @format_count: number of formats supported
604  * @crtc: currently bound CRTC
605  * @fb: currently bound fb
606  * @funcs: helper functions
607  * @properties: property tracking for this plane
608  * @type: type of plane (overlay, primary, cursor)
609  */
610 struct drm_plane {
611 	struct drm_device *dev;
612 	struct list_head head;
613 
614 	struct drm_mode_object base;
615 
616 	uint32_t possible_crtcs;
617 	uint32_t *format_types;
618 	uint32_t format_count;
619 
620 	struct drm_crtc *crtc;
621 	struct drm_framebuffer *fb;
622 
623 	/* Temporary tracking of the old fb while a modeset is ongoing. Used
624 	 * by drm_mode_set_config_internal to implement correct refcounting. */
625 	struct drm_framebuffer *old_fb;
626 
627 	const struct drm_plane_funcs *funcs;
628 
629 	struct drm_object_properties properties;
630 
631 	enum drm_plane_type type;
632 };
633 
634 /**
635  * drm_bridge_funcs - drm_bridge control functions
636  * @mode_fixup: Try to fixup (or reject entirely) proposed mode for this bridge
637  * @disable: Called right before encoder prepare, disables the bridge
638  * @post_disable: Called right after encoder prepare, for lockstepped disable
639  * @mode_set: Set this mode to the bridge
640  * @pre_enable: Called right before encoder commit, for lockstepped commit
641  * @enable: Called right after encoder commit, enables the bridge
642  * @destroy: make object go away
643  */
644 struct drm_bridge_funcs {
645 	bool (*mode_fixup)(struct drm_bridge *bridge,
646 			   const struct drm_display_mode *mode,
647 			   struct drm_display_mode *adjusted_mode);
648 	void (*disable)(struct drm_bridge *bridge);
649 	void (*post_disable)(struct drm_bridge *bridge);
650 	void (*mode_set)(struct drm_bridge *bridge,
651 			 struct drm_display_mode *mode,
652 			 struct drm_display_mode *adjusted_mode);
653 	void (*pre_enable)(struct drm_bridge *bridge);
654 	void (*enable)(struct drm_bridge *bridge);
655 	void (*destroy)(struct drm_bridge *bridge);
656 };
657 
658 /**
659  * drm_bridge - central DRM bridge control structure
660  * @dev: DRM device this bridge belongs to
661  * @head: list management
662  * @base: base mode object
663  * @funcs: control functions
664  * @driver_private: pointer to the bridge driver's internal context
665  */
666 struct drm_bridge {
667 	struct drm_device *dev;
668 	struct list_head head;
669 
670 	struct drm_mode_object base;
671 
672 	const struct drm_bridge_funcs *funcs;
673 	void *driver_private;
674 };
675 
676 /**
677  * drm_mode_set - new values for a CRTC config change
678  * @head: list management
679  * @fb: framebuffer to use for new config
680  * @crtc: CRTC whose configuration we're about to change
681  * @mode: mode timings to use
682  * @x: position of this CRTC relative to @fb
683  * @y: position of this CRTC relative to @fb
684  * @connectors: array of connectors to drive with this CRTC if possible
685  * @num_connectors: size of @connectors array
686  *
687  * Represents a single crtc the connectors that it drives with what mode
688  * and from which framebuffer it scans out from.
689  *
690  * This is used to set modes.
691  */
692 struct drm_mode_set {
693 	struct drm_framebuffer *fb;
694 	struct drm_crtc *crtc;
695 	struct drm_display_mode *mode;
696 
697 	uint32_t x;
698 	uint32_t y;
699 
700 	struct drm_connector **connectors;
701 	size_t num_connectors;
702 };
703 
704 /**
705  * struct drm_mode_config_funcs - basic driver provided mode setting functions
706  * @fb_create: create a new framebuffer object
707  * @output_poll_changed: function to handle output configuration changes
708  *
709  * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
710  * involve drivers.
711  */
712 struct drm_mode_config_funcs {
713 	struct drm_framebuffer *(*fb_create)(struct drm_device *dev,
714 					     struct drm_file *file_priv,
715 					     struct drm_mode_fb_cmd2 *mode_cmd);
716 	void (*output_poll_changed)(struct drm_device *dev);
717 };
718 
719 /**
720  * drm_mode_group - group of mode setting resources for potential sub-grouping
721  * @num_crtcs: CRTC count
722  * @num_encoders: encoder count
723  * @num_connectors: connector count
724  * @id_list: list of KMS object IDs in this group
725  *
726  * Currently this simply tracks the global mode setting state.  But in the
727  * future it could allow groups of objects to be set aside into independent
728  * control groups for use by different user level processes (e.g. two X servers
729  * running simultaneously on different heads, each with their own mode
730  * configuration and freedom of mode setting).
731  */
732 struct drm_mode_group {
733 	uint32_t num_crtcs;
734 	uint32_t num_encoders;
735 	uint32_t num_connectors;
736 	uint32_t num_bridges;
737 
738 	/* list of object IDs for this group */
739 	uint32_t *id_list;
740 };
741 
742 /**
743  * drm_mode_config - Mode configuration control structure
744  * @mutex: mutex protecting KMS related lists and structures
745  * @idr_mutex: mutex for KMS ID allocation and management
746  * @crtc_idr: main KMS ID tracking object
747  * @num_fb: number of fbs available
748  * @fb_list: list of framebuffers available
749  * @num_connector: number of connectors on this device
750  * @connector_list: list of connector objects
751  * @num_bridge: number of bridges on this device
752  * @bridge_list: list of bridge objects
753  * @num_encoder: number of encoders on this device
754  * @encoder_list: list of encoder objects
755  * @num_crtc: number of CRTCs on this device
756  * @crtc_list: list of CRTC objects
757  * @min_width: minimum pixel width on this device
758  * @min_height: minimum pixel height on this device
759  * @max_width: maximum pixel width on this device
760  * @max_height: maximum pixel height on this device
761  * @funcs: core driver provided mode setting functions
762  * @fb_base: base address of the framebuffer
763  * @poll_enabled: track polling status for this device
764  * @output_poll_work: delayed work for polling in process context
765  * @*_property: core property tracking
766  *
767  * Core mode resource tracking structure.  All CRTC, encoders, and connectors
768  * enumerated by the driver are added here, as are global properties.  Some
769  * global restrictions are also here, e.g. dimension restrictions.
770  */
771 struct drm_mode_config {
772 	struct mutex mutex; /* protects configuration (mode lists etc.) */
773 	struct drm_modeset_lock connection_mutex; /* protects connector->encoder and encoder->crtc links */
774 	struct drm_modeset_acquire_ctx *acquire_ctx; /* for legacy _lock_all() / _unlock_all() */
775 	struct mutex idr_mutex; /* for IDR management */
776 	struct idr crtc_idr; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
777 	/* this is limited to one for now */
778 
779 
780 	/**
781 	 * fb_lock - mutex to protect fb state
782 	 *
783 	 * Besides the global fb list his also protects the fbs list in the
784 	 * file_priv
785 	 */
786 	struct mutex fb_lock;
787 	int num_fb;
788 	struct list_head fb_list;
789 
790 	int num_connector;
791 	struct list_head connector_list;
792 	int num_bridge;
793 	struct list_head bridge_list;
794 	int num_encoder;
795 	struct list_head encoder_list;
796 
797 	/*
798 	 * Track # of overlay planes separately from # of total planes.  By
799 	 * default we only advertise overlay planes to userspace; if userspace
800 	 * sets the "universal plane" capability bit, we'll go ahead and
801 	 * expose all planes.
802 	 */
803 	int num_overlay_plane;
804 	int num_total_plane;
805 	struct list_head plane_list;
806 
807 	int num_crtc;
808 	struct list_head crtc_list;
809 
810 	struct list_head property_list;
811 
812 	int min_width, min_height;
813 	int max_width, max_height;
814 	const struct drm_mode_config_funcs *funcs;
815 	resource_size_t fb_base;
816 
817 	/* output poll support */
818 	bool poll_enabled;
819 	bool poll_running;
820 	struct delayed_work output_poll_work;
821 
822 	/* pointers to standard properties */
823 	struct list_head property_blob_list;
824 	struct drm_property *edid_property;
825 	struct drm_property *dpms_property;
826 	struct drm_property *path_property;
827 	struct drm_property *plane_type_property;
828 	struct drm_property *rotation_property;
829 
830 	/* DVI-I properties */
831 	struct drm_property *dvi_i_subconnector_property;
832 	struct drm_property *dvi_i_select_subconnector_property;
833 
834 	/* TV properties */
835 	struct drm_property *tv_subconnector_property;
836 	struct drm_property *tv_select_subconnector_property;
837 	struct drm_property *tv_mode_property;
838 	struct drm_property *tv_left_margin_property;
839 	struct drm_property *tv_right_margin_property;
840 	struct drm_property *tv_top_margin_property;
841 	struct drm_property *tv_bottom_margin_property;
842 	struct drm_property *tv_brightness_property;
843 	struct drm_property *tv_contrast_property;
844 	struct drm_property *tv_flicker_reduction_property;
845 	struct drm_property *tv_overscan_property;
846 	struct drm_property *tv_saturation_property;
847 	struct drm_property *tv_hue_property;
848 
849 	/* Optional properties */
850 	struct drm_property *scaling_mode_property;
851 	struct drm_property *aspect_ratio_property;
852 	struct drm_property *dirty_info_property;
853 
854 	/* dumb ioctl parameters */
855 	uint32_t preferred_depth, prefer_shadow;
856 
857 	/* whether async page flip is supported or not */
858 	bool async_page_flip;
859 
860 	/* cursor size */
861 	uint32_t cursor_width, cursor_height;
862 };
863 
864 #define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
865 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
866 #define obj_to_encoder(x) container_of(x, struct drm_encoder, base)
867 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
868 #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
869 #define obj_to_property(x) container_of(x, struct drm_property, base)
870 #define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
871 #define obj_to_plane(x) container_of(x, struct drm_plane, base)
872 
873 struct drm_prop_enum_list {
874 	int type;
875 	char *name;
876 };
877 
878 extern int drm_crtc_init_with_planes(struct drm_device *dev,
879 				     struct drm_crtc *crtc,
880 				     struct drm_plane *primary,
881 				     struct drm_plane *cursor,
882 				     const struct drm_crtc_funcs *funcs);
883 extern int drm_crtc_init(struct drm_device *dev,
884 			 struct drm_crtc *crtc,
885 			 const struct drm_crtc_funcs *funcs);
886 extern void drm_crtc_cleanup(struct drm_crtc *crtc);
887 extern unsigned int drm_crtc_index(struct drm_crtc *crtc);
888 
889 /**
890  * drm_crtc_mask - find the mask of a registered CRTC
891  * @crtc: CRTC to find mask for
892  *
893  * Given a registered CRTC, return the mask bit of that CRTC for an
894  * encoder's possible_crtcs field.
895  */
896 static inline uint32_t drm_crtc_mask(struct drm_crtc *crtc)
897 {
898 	return 1 << drm_crtc_index(crtc);
899 }
900 
901 extern void drm_connector_ida_init(void);
902 extern void drm_connector_ida_destroy(void);
903 extern int drm_connector_init(struct drm_device *dev,
904 			      struct drm_connector *connector,
905 			      const struct drm_connector_funcs *funcs,
906 			      int connector_type);
907 int drm_connector_register(struct drm_connector *connector);
908 void drm_connector_unregister(struct drm_connector *connector);
909 
910 extern void drm_connector_cleanup(struct drm_connector *connector);
911 extern unsigned int drm_connector_index(struct drm_connector *connector);
912 /* helper to unplug all connectors from sysfs for device */
913 extern void drm_connector_unplug_all(struct drm_device *dev);
914 
915 extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
916 			   const struct drm_bridge_funcs *funcs);
917 extern void drm_bridge_cleanup(struct drm_bridge *bridge);
918 
919 extern int drm_encoder_init(struct drm_device *dev,
920 			    struct drm_encoder *encoder,
921 			    const struct drm_encoder_funcs *funcs,
922 			    int encoder_type);
923 
924 /**
925  * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
926  * @encoder: encoder to test
927  * @crtc: crtc to test
928  *
929  * Return false if @encoder can't be driven by @crtc, true otherwise.
930  */
931 static inline bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
932 				       struct drm_crtc *crtc)
933 {
934 	return !!(encoder->possible_crtcs & drm_crtc_mask(crtc));
935 }
936 
937 extern int drm_universal_plane_init(struct drm_device *dev,
938 				    struct drm_plane *plane,
939 				    unsigned long possible_crtcs,
940 				    const struct drm_plane_funcs *funcs,
941 				    const uint32_t *formats,
942 				    uint32_t format_count,
943 				    enum drm_plane_type type);
944 extern int drm_plane_init(struct drm_device *dev,
945 			  struct drm_plane *plane,
946 			  unsigned long possible_crtcs,
947 			  const struct drm_plane_funcs *funcs,
948 			  const uint32_t *formats, uint32_t format_count,
949 			  bool is_primary);
950 extern void drm_plane_cleanup(struct drm_plane *plane);
951 extern unsigned int drm_plane_index(struct drm_plane *plane);
952 extern void drm_plane_force_disable(struct drm_plane *plane);
953 extern int drm_crtc_check_viewport(const struct drm_crtc *crtc,
954 				   int x, int y,
955 				   const struct drm_display_mode *mode,
956 				   const struct drm_framebuffer *fb);
957 
958 extern void drm_encoder_cleanup(struct drm_encoder *encoder);
959 
960 extern const char *drm_get_connector_status_name(enum drm_connector_status status);
961 extern const char *drm_get_subpixel_order_name(enum subpixel_order order);
962 extern const char *drm_get_dpms_name(int val);
963 extern const char *drm_get_dvi_i_subconnector_name(int val);
964 extern const char *drm_get_dvi_i_select_name(int val);
965 extern const char *drm_get_tv_subconnector_name(int val);
966 extern const char *drm_get_tv_select_name(int val);
967 extern void drm_fb_release(struct drm_file *file_priv);
968 extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group);
969 extern void drm_mode_group_destroy(struct drm_mode_group *group);
970 extern void drm_reinit_primary_mode_group(struct drm_device *dev);
971 extern bool drm_probe_ddc(struct i2c_adapter *adapter);
972 extern struct edid *drm_get_edid(struct drm_connector *connector,
973 				 struct i2c_adapter *adapter);
974 extern struct edid *drm_edid_duplicate(const struct edid *edid);
975 extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
976 extern void drm_mode_config_init(struct drm_device *dev);
977 extern void drm_mode_config_reset(struct drm_device *dev);
978 extern void drm_mode_config_cleanup(struct drm_device *dev);
979 
980 extern int drm_mode_connector_set_path_property(struct drm_connector *connector,
981 						char *path);
982 extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
983 						struct edid *edid);
984 
985 static inline bool drm_property_type_is(struct drm_property *property,
986 		uint32_t type)
987 {
988 	/* instanceof for props.. handles extended type vs original types: */
989 	if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
990 		return (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) == type;
991 	return property->flags & type;
992 }
993 
994 static inline bool drm_property_type_valid(struct drm_property *property)
995 {
996 	if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
997 		return !(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
998 	return !!(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
999 }
1000 
1001 extern int drm_object_property_set_value(struct drm_mode_object *obj,
1002 					 struct drm_property *property,
1003 					 uint64_t val);
1004 extern int drm_object_property_get_value(struct drm_mode_object *obj,
1005 					 struct drm_property *property,
1006 					 uint64_t *value);
1007 extern int drm_framebuffer_init(struct drm_device *dev,
1008 				struct drm_framebuffer *fb,
1009 				const struct drm_framebuffer_funcs *funcs);
1010 extern struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
1011 						      uint32_t id);
1012 extern void drm_framebuffer_unreference(struct drm_framebuffer *fb);
1013 extern void drm_framebuffer_reference(struct drm_framebuffer *fb);
1014 extern void drm_framebuffer_remove(struct drm_framebuffer *fb);
1015 extern void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
1016 extern void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
1017 
1018 extern void drm_object_attach_property(struct drm_mode_object *obj,
1019 				       struct drm_property *property,
1020 				       uint64_t init_val);
1021 extern struct drm_property *drm_property_create(struct drm_device *dev, int flags,
1022 						const char *name, int num_values);
1023 extern struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
1024 					 const char *name,
1025 					 const struct drm_prop_enum_list *props,
1026 					 int num_values);
1027 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
1028 					 int flags, const char *name,
1029 					 const struct drm_prop_enum_list *props,
1030 					 int num_props,
1031 					 uint64_t supported_bits);
1032 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
1033 					 const char *name,
1034 					 uint64_t min, uint64_t max);
1035 struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
1036 					 int flags, const char *name,
1037 					 int64_t min, int64_t max);
1038 struct drm_property *drm_property_create_object(struct drm_device *dev,
1039 					 int flags, const char *name, uint32_t type);
1040 extern void drm_property_destroy(struct drm_device *dev, struct drm_property *property);
1041 extern int drm_property_add_enum(struct drm_property *property, int index,
1042 				 uint64_t value, const char *name);
1043 extern int drm_mode_create_dvi_i_properties(struct drm_device *dev);
1044 extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats,
1045 				     char *formats[]);
1046 extern int drm_mode_create_scaling_mode_property(struct drm_device *dev);
1047 extern int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
1048 extern int drm_mode_create_dirty_info_property(struct drm_device *dev);
1049 
1050 extern int drm_mode_connector_attach_encoder(struct drm_connector *connector,
1051 					     struct drm_encoder *encoder);
1052 extern int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
1053 					 int gamma_size);
1054 extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
1055 		uint32_t id, uint32_t type);
1056 
1057 /* IOCTLs */
1058 extern int drm_mode_getresources(struct drm_device *dev,
1059 				 void *data, struct drm_file *file_priv);
1060 extern int drm_mode_getplane_res(struct drm_device *dev, void *data,
1061 				   struct drm_file *file_priv);
1062 extern int drm_mode_getcrtc(struct drm_device *dev,
1063 			    void *data, struct drm_file *file_priv);
1064 extern int drm_mode_getconnector(struct drm_device *dev,
1065 			      void *data, struct drm_file *file_priv);
1066 extern int drm_mode_set_config_internal(struct drm_mode_set *set);
1067 extern int drm_mode_setcrtc(struct drm_device *dev,
1068 			    void *data, struct drm_file *file_priv);
1069 extern int drm_mode_getplane(struct drm_device *dev,
1070 			       void *data, struct drm_file *file_priv);
1071 extern int drm_mode_setplane(struct drm_device *dev,
1072 			       void *data, struct drm_file *file_priv);
1073 extern int drm_mode_cursor_ioctl(struct drm_device *dev,
1074 				void *data, struct drm_file *file_priv);
1075 extern int drm_mode_cursor2_ioctl(struct drm_device *dev,
1076 				void *data, struct drm_file *file_priv);
1077 extern int drm_mode_addfb(struct drm_device *dev,
1078 			  void *data, struct drm_file *file_priv);
1079 extern int drm_mode_addfb2(struct drm_device *dev,
1080 			   void *data, struct drm_file *file_priv);
1081 extern uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth);
1082 extern int drm_mode_rmfb(struct drm_device *dev,
1083 			 void *data, struct drm_file *file_priv);
1084 extern int drm_mode_getfb(struct drm_device *dev,
1085 			  void *data, struct drm_file *file_priv);
1086 extern int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
1087 				  void *data, struct drm_file *file_priv);
1088 
1089 extern int drm_mode_getproperty_ioctl(struct drm_device *dev,
1090 				      void *data, struct drm_file *file_priv);
1091 extern int drm_mode_getblob_ioctl(struct drm_device *dev,
1092 				  void *data, struct drm_file *file_priv);
1093 extern int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1094 					      void *data, struct drm_file *file_priv);
1095 extern int drm_mode_getencoder(struct drm_device *dev,
1096 			       void *data, struct drm_file *file_priv);
1097 extern int drm_mode_gamma_get_ioctl(struct drm_device *dev,
1098 				    void *data, struct drm_file *file_priv);
1099 extern int drm_mode_gamma_set_ioctl(struct drm_device *dev,
1100 				    void *data, struct drm_file *file_priv);
1101 extern u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
1102 extern enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
1103 extern bool drm_detect_hdmi_monitor(struct edid *edid);
1104 extern bool drm_detect_monitor_audio(struct edid *edid);
1105 extern bool drm_rgb_quant_range_selectable(struct edid *edid);
1106 extern int drm_mode_page_flip_ioctl(struct drm_device *dev,
1107 				    void *data, struct drm_file *file_priv);
1108 extern int drm_add_modes_noedid(struct drm_connector *connector,
1109 				int hdisplay, int vdisplay);
1110 extern void drm_set_preferred_mode(struct drm_connector *connector,
1111 				   int hpref, int vpref);
1112 
1113 extern int drm_edid_header_is_valid(const u8 *raw_edid);
1114 extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid);
1115 extern bool drm_edid_is_valid(struct edid *edid);
1116 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
1117 					   int hsize, int vsize, int fresh,
1118 					   bool rb);
1119 
1120 extern int drm_mode_create_dumb_ioctl(struct drm_device *dev,
1121 				      void *data, struct drm_file *file_priv);
1122 extern int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
1123 				    void *data, struct drm_file *file_priv);
1124 extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
1125 				      void *data, struct drm_file *file_priv);
1126 extern int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
1127 					     struct drm_file *file_priv);
1128 extern int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
1129 					   struct drm_file *file_priv);
1130 extern int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
1131 				       struct drm_property *property,
1132 				       uint64_t value);
1133 
1134 extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
1135 				 int *bpp);
1136 extern int drm_format_num_planes(uint32_t format);
1137 extern int drm_format_plane_cpp(uint32_t format, int plane);
1138 extern int drm_format_horz_chroma_subsampling(uint32_t format);
1139 extern int drm_format_vert_chroma_subsampling(uint32_t format);
1140 extern const char *drm_get_format_name(uint32_t format);
1141 extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
1142 							      unsigned int supported_rotations);
1143 extern unsigned int drm_rotation_simplify(unsigned int rotation,
1144 					  unsigned int supported_rotations);
1145 
1146 /* Helpers */
1147 
1148 static inline struct drm_plane *drm_plane_find(struct drm_device *dev,
1149 		uint32_t id)
1150 {
1151 	struct drm_mode_object *mo;
1152 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_PLANE);
1153 	return mo ? obj_to_plane(mo) : NULL;
1154 }
1155 
1156 static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev,
1157 	uint32_t id)
1158 {
1159 	struct drm_mode_object *mo;
1160 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CRTC);
1161 	return mo ? obj_to_crtc(mo) : NULL;
1162 }
1163 
1164 static inline struct drm_encoder *drm_encoder_find(struct drm_device *dev,
1165 	uint32_t id)
1166 {
1167 	struct drm_mode_object *mo;
1168 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER);
1169 	return mo ? obj_to_encoder(mo) : NULL;
1170 }
1171 
1172 static inline struct drm_connector *drm_connector_find(struct drm_device *dev,
1173 		uint32_t id)
1174 {
1175 	struct drm_mode_object *mo;
1176 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR);
1177 	return mo ? obj_to_connector(mo) : NULL;
1178 }
1179 
1180 static inline struct drm_property *drm_property_find(struct drm_device *dev,
1181 		uint32_t id)
1182 {
1183 	struct drm_mode_object *mo;
1184 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_PROPERTY);
1185 	return mo ? obj_to_property(mo) : NULL;
1186 }
1187 
1188 static inline struct drm_property_blob *
1189 drm_property_blob_find(struct drm_device *dev, uint32_t id)
1190 {
1191 	struct drm_mode_object *mo;
1192 	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_BLOB);
1193 	return mo ? obj_to_blob(mo) : NULL;
1194 }
1195 
1196 /* Plane list iterator for legacy (overlay only) planes. */
1197 #define drm_for_each_legacy_plane(plane, planelist) \
1198 	list_for_each_entry(plane, planelist, head) \
1199 		if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1200 
1201 #endif /* __DRM_CRTC_H__ */
1202