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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
33#include <linux/fb.h>
34
35struct drm_device;
36struct drm_mode_set;
37struct drm_framebuffer;
38
39
40#define DRM_MODE_OBJECT_CRTC 0xcccccccc
41#define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
42#define DRM_MODE_OBJECT_ENCODER 0xe0e0e0e0
43#define DRM_MODE_OBJECT_MODE 0xdededede
44#define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
45#define DRM_MODE_OBJECT_FB 0xfbfbfbfb
46#define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
47
48struct drm_mode_object {
49 uint32_t id;
50 uint32_t type;
51};
52
53/*
54 * Note on terminology: here, for brevity and convenience, we refer to connector
55 * control chips as 'CRTCs'. They can control any type of connector, VGA, LVDS,
56 * DVI, etc. And 'screen' refers to the whole of the visible display, which
57 * may span multiple monitors (and therefore multiple CRTC and connector
58 * structures).
59 */
60
61enum drm_mode_status {
62 MODE_OK = 0, /* Mode OK */
63 MODE_HSYNC, /* hsync out of range */
64 MODE_VSYNC, /* vsync out of range */
65 MODE_H_ILLEGAL, /* mode has illegal horizontal timings */
66 MODE_V_ILLEGAL, /* mode has illegal horizontal timings */
67 MODE_BAD_WIDTH, /* requires an unsupported linepitch */
68 MODE_NOMODE, /* no mode with a matching name */
69 MODE_NO_INTERLACE, /* interlaced mode not supported */
70 MODE_NO_DBLESCAN, /* doublescan mode not supported */
71 MODE_NO_VSCAN, /* multiscan mode not supported */
72 MODE_MEM, /* insufficient video memory */
73 MODE_VIRTUAL_X, /* mode width too large for specified virtual size */
74 MODE_VIRTUAL_Y, /* mode height too large for specified virtual size */
75 MODE_MEM_VIRT, /* insufficient video memory given virtual size */
76 MODE_NOCLOCK, /* no fixed clock available */
77 MODE_CLOCK_HIGH, /* clock required is too high */
78 MODE_CLOCK_LOW, /* clock required is too low */
79 MODE_CLOCK_RANGE, /* clock/mode isn't in a ClockRange */
80 MODE_BAD_HVALUE, /* horizontal timing was out of range */
81 MODE_BAD_VVALUE, /* vertical timing was out of range */
82 MODE_BAD_VSCAN, /* VScan value out of range */
83 MODE_HSYNC_NARROW, /* horizontal sync too narrow */
84 MODE_HSYNC_WIDE, /* horizontal sync too wide */
85 MODE_HBLANK_NARROW, /* horizontal blanking too narrow */
86 MODE_HBLANK_WIDE, /* horizontal blanking too wide */
87 MODE_VSYNC_NARROW, /* vertical sync too narrow */
88 MODE_VSYNC_WIDE, /* vertical sync too wide */
89 MODE_VBLANK_NARROW, /* vertical blanking too narrow */
90 MODE_VBLANK_WIDE, /* vertical blanking too wide */
91 MODE_PANEL, /* exceeds panel dimensions */
92 MODE_INTERLACE_WIDTH, /* width too large for interlaced mode */
93 MODE_ONE_WIDTH, /* only one width is supported */
94 MODE_ONE_HEIGHT, /* only one height is supported */
95 MODE_ONE_SIZE, /* only one resolution is supported */
96 MODE_NO_REDUCED, /* monitor doesn't accept reduced blanking */
97 MODE_UNVERIFIED = -3, /* mode needs to reverified */
98 MODE_BAD = -2, /* unspecified reason */
99 MODE_ERROR = -1 /* error condition */
100};
101
102#define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
103 DRM_MODE_TYPE_CRTC_C)
104
105#define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
106 .name = nm, .status = 0, .type = (t), .clock = (c), \
107 .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
108 .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
109 .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
110 .vscan = (vs), .flags = (f), .vrefresh = 0
111
112#define CRTC_INTERLACE_HALVE_V 0x1 /* halve V values for interlacing */
113
114struct drm_display_mode {
115 /* Header */
116 struct list_head head;
117 struct drm_mode_object base;
118
119 char name[DRM_DISPLAY_MODE_LEN];
120
121 int connector_count;
122 enum drm_mode_status status;
123 int type;
124
125 /* Proposed mode values */
126 int clock; /* in kHz */
127 int hdisplay;
128 int hsync_start;
129 int hsync_end;
130 int htotal;
131 int hskew;
132 int vdisplay;
133 int vsync_start;
134 int vsync_end;
135 int vtotal;
136 int vscan;
137 unsigned int flags;
138
139 /* Addressable image size (may be 0 for projectors, etc.) */
140 int width_mm;
141 int height_mm;
142
143 /* Actual mode we give to hw */
144 int clock_index;
145 int synth_clock;
146 int crtc_hdisplay;
147 int crtc_hblank_start;
148 int crtc_hblank_end;
149 int crtc_hsync_start;
150 int crtc_hsync_end;
151 int crtc_htotal;
152 int crtc_hskew;
153 int crtc_vdisplay;
154 int crtc_vblank_start;
155 int crtc_vblank_end;
156 int crtc_vsync_start;
157 int crtc_vsync_end;
158 int crtc_vtotal;
159 int crtc_hadjusted;
160 int crtc_vadjusted;
161
162 /* Driver private mode info */
163 int private_size;
164 int *private;
165 int private_flags;
166
167 int vrefresh; /* in Hz */
168 int hsync; /* in kHz */
169};
170
171enum drm_connector_status {
172 connector_status_connected = 1,
173 connector_status_disconnected = 2,
174 connector_status_unknown = 3,
175};
176
177enum subpixel_order {
178 SubPixelUnknown = 0,
179 SubPixelHorizontalRGB,
180 SubPixelHorizontalBGR,
181 SubPixelVerticalRGB,
182 SubPixelVerticalBGR,
183 SubPixelNone,
184};
185
186#define DRM_COLOR_FORMAT_RGB444 (1<<0)
187#define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
188#define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
189/*
190 * Describes a given display (e.g. CRT or flat panel) and its limitations.
191 */
192struct drm_display_info {
193 char name[DRM_DISPLAY_INFO_LEN];
194
195 /* Physical size */
196 unsigned int width_mm;
197 unsigned int height_mm;
198
199 /* Clock limits FIXME: storage format */
200 unsigned int min_vfreq, max_vfreq;
201 unsigned int min_hfreq, max_hfreq;
202 unsigned int pixel_clock;
203 unsigned int bpc;
204
205 enum subpixel_order subpixel_order;
206 u32 color_formats;
207
208 u8 cea_rev;
209
210 char *raw_edid; /* if any */
211};
212
213struct drm_framebuffer_funcs {
214 void (*destroy)(struct drm_framebuffer *framebuffer);
215 int (*create_handle)(struct drm_framebuffer *fb,
216 struct drm_file *file_priv,
217 unsigned int *handle);
218 /**
219 * Optinal callback for the dirty fb ioctl.
220 *
221 * Userspace can notify the driver via this callback
222 * that a area of the framebuffer has changed and should
223 * be flushed to the display hardware.
224 *
225 * See documentation in drm_mode.h for the struct
226 * drm_mode_fb_dirty_cmd for more information as all
227 * the semantics and arguments have a one to one mapping
228 * on this function.
229 */
230 int (*dirty)(struct drm_framebuffer *framebuffer,
231 struct drm_file *file_priv, unsigned flags,
232 unsigned color, struct drm_clip_rect *clips,
233 unsigned num_clips);
234};
235
236struct drm_framebuffer {
237 struct drm_device *dev;
238 struct list_head head;
239 struct drm_mode_object base;
240 const struct drm_framebuffer_funcs *funcs;
241 unsigned int pitch;
242 unsigned int width;
243 unsigned int height;
244 /* depth can be 15 or 16 */
245 unsigned int depth;
246 int bits_per_pixel;
247 int flags;
248 struct list_head filp_head;
249 /* if you are using the helper */
250 void *helper_private;
251};
252
253struct drm_property_blob {
254 struct drm_mode_object base;
255 struct list_head head;
256 unsigned int length;
257 void *data;
258};
259
260struct drm_property_enum {
261 uint64_t value;
262 struct list_head head;
263 char name[DRM_PROP_NAME_LEN];
264};
265
266struct drm_property {
267 struct list_head head;
268 struct drm_mode_object base;
269 uint32_t flags;
270 char name[DRM_PROP_NAME_LEN];
271 uint32_t num_values;
272 uint64_t *values;
273
274 struct list_head enum_blob_list;
275};
276
277struct drm_crtc;
278struct drm_connector;
279struct drm_encoder;
280struct drm_pending_vblank_event;
281
282/**
283 * drm_crtc_funcs - control CRTCs for a given device
284 * @reset: reset CRTC after state has been invalidate (e.g. resume)
285 * @dpms: control display power levels
286 * @save: save CRTC state
287 * @resore: restore CRTC state
288 * @lock: lock the CRTC
289 * @unlock: unlock the CRTC
290 * @shadow_allocate: allocate shadow pixmap
291 * @shadow_create: create shadow pixmap for rotation support
292 * @shadow_destroy: free shadow pixmap
293 * @mode_fixup: fixup proposed mode
294 * @mode_set: set the desired mode on the CRTC
295 * @gamma_set: specify color ramp for CRTC
296 * @destroy: deinit and free object.
297 *
298 * The drm_crtc_funcs structure is the central CRTC management structure
299 * in the DRM. Each CRTC controls one or more connectors (note that the name
300 * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc.
301 * connectors, not just CRTs).
302 *
303 * Each driver is responsible for filling out this structure at startup time,
304 * in addition to providing other modesetting features, like i2c and DDC
305 * bus accessors.
306 */
307struct drm_crtc_funcs {
308 /* Save CRTC state */
309 void (*save)(struct drm_crtc *crtc); /* suspend? */
310 /* Restore CRTC state */
311 void (*restore)(struct drm_crtc *crtc); /* resume? */
312 /* Reset CRTC state */
313 void (*reset)(struct drm_crtc *crtc);
314
315 /* cursor controls */
316 int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv,
317 uint32_t handle, uint32_t width, uint32_t height);
318 int (*cursor_move)(struct drm_crtc *crtc, int x, int y);
319
320 /* Set gamma on the CRTC */
321 void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
322 uint32_t start, uint32_t size);
323 /* Object destroy routine */
324 void (*destroy)(struct drm_crtc *crtc);
325
326 int (*set_config)(struct drm_mode_set *set);
327
328 /*
329 * Flip to the given framebuffer. This implements the page
330 * flip ioctl described in drm_mode.h, specifically, the
331 * implementation must return immediately and block all
332 * rendering to the current fb until the flip has completed.
333 * If userspace set the event flag in the ioctl, the event
334 * argument will point to an event to send back when the flip
335 * completes, otherwise it will be NULL.
336 */
337 int (*page_flip)(struct drm_crtc *crtc,
338 struct drm_framebuffer *fb,
339 struct drm_pending_vblank_event *event);
340};
341
342/**
343 * drm_crtc - central CRTC control structure
344 * @enabled: is this CRTC enabled?
345 * @x: x position on screen
346 * @y: y position on screen
347 * @funcs: CRTC control functions
348 *
349 * Each CRTC may have one or more connectors associated with it. This structure
350 * allows the CRTC to be controlled.
351 */
352struct drm_crtc {
353 struct drm_device *dev;
354 struct list_head head;
355
356 struct drm_mode_object base;
357
358 /* framebuffer the connector is currently bound to */
359 struct drm_framebuffer *fb;
360
361 bool enabled;
362
363 /* Requested mode from modesetting. */
364 struct drm_display_mode mode;
365
366 /* Programmed mode in hw, after adjustments for encoders,
367 * crtc, panel scaling etc. Needed for timestamping etc.
368 */
369 struct drm_display_mode hwmode;
370
371 int x, y;
372 const struct drm_crtc_funcs *funcs;
373
374 /* CRTC gamma size for reporting to userspace */
375 uint32_t gamma_size;
376 uint16_t *gamma_store;
377
378 /* Constants needed for precise vblank and swap timestamping. */
379 s64 framedur_ns, linedur_ns, pixeldur_ns;
380
381 /* if you are using the helper */
382 void *helper_private;
383};
384
385
386/**
387 * drm_connector_funcs - control connectors on a given device
388 * @dpms: set power state (see drm_crtc_funcs above)
389 * @save: save connector state
390 * @restore: restore connector state
391 * @reset: reset connector after state has been invalidate (e.g. resume)
392 * @mode_valid: is this mode valid on the given connector?
393 * @mode_fixup: try to fixup proposed mode for this connector
394 * @mode_set: set this mode
395 * @detect: is this connector active?
396 * @get_modes: get mode list for this connector
397 * @set_property: property for this connector may need update
398 * @destroy: make object go away
399 * @force: notify the driver the connector is forced on
400 *
401 * Each CRTC may have one or more connectors attached to it. The functions
402 * below allow the core DRM code to control connectors, enumerate available modes,
403 * etc.
404 */
405struct drm_connector_funcs {
406 void (*dpms)(struct drm_connector *connector, int mode);
407 void (*save)(struct drm_connector *connector);
408 void (*restore)(struct drm_connector *connector);
409 void (*reset)(struct drm_connector *connector);
410
411 /* Check to see if anything is attached to the connector.
412 * @force is set to false whilst polling, true when checking the
413 * connector due to user request. @force can be used by the driver
414 * to avoid expensive, destructive operations during automated
415 * probing.
416 */
417 enum drm_connector_status (*detect)(struct drm_connector *connector,
418 bool force);
419 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
420 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
421 uint64_t val);
422 void (*destroy)(struct drm_connector *connector);
423 void (*force)(struct drm_connector *connector);
424};
425
426struct drm_encoder_funcs {
427 void (*reset)(struct drm_encoder *encoder);
428 void (*destroy)(struct drm_encoder *encoder);
429};
430
431#define DRM_CONNECTOR_MAX_UMODES 16
432#define DRM_CONNECTOR_MAX_PROPERTY 16
433#define DRM_CONNECTOR_LEN 32
434#define DRM_CONNECTOR_MAX_ENCODER 2
435
436/**
437 * drm_encoder - central DRM encoder structure
438 */
439struct drm_encoder {
440 struct drm_device *dev;
441 struct list_head head;
442
443 struct drm_mode_object base;
444 int encoder_type;
445 uint32_t possible_crtcs;
446 uint32_t possible_clones;
447
448 struct drm_crtc *crtc;
449 const struct drm_encoder_funcs *funcs;
450 void *helper_private;
451};
452
453enum drm_connector_force {
454 DRM_FORCE_UNSPECIFIED,
455 DRM_FORCE_OFF,
456 DRM_FORCE_ON, /* force on analog part normally */
457 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
458};
459
460/* should we poll this connector for connects and disconnects */
461/* hot plug detectable */
462#define DRM_CONNECTOR_POLL_HPD (1 << 0)
463/* poll for connections */
464#define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
465/* can cleanly poll for disconnections without flickering the screen */
466/* DACs should rarely do this without a lot of testing */
467#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
468
469/**
470 * drm_connector - central DRM connector control structure
471 * @crtc: CRTC this connector is currently connected to, NULL if none
472 * @interlace_allowed: can this connector handle interlaced modes?
473 * @doublescan_allowed: can this connector handle doublescan?
474 * @available_modes: modes available on this connector (from get_modes() + user)
475 * @initial_x: initial x position for this connector
476 * @initial_y: initial y position for this connector
477 * @status: connector connected?
478 * @funcs: connector control functions
479 *
480 * Each connector may be connected to one or more CRTCs, or may be clonable by
481 * another connector if they can share a CRTC. Each connector also has a specific
482 * position in the broader display (referred to as a 'screen' though it could
483 * span multiple monitors).
484 */
485struct drm_connector {
486 struct drm_device *dev;
487 struct device kdev;
488 struct device_attribute *attr;
489 struct list_head head;
490
491 struct drm_mode_object base;
492
493 int connector_type;
494 int connector_type_id;
495 bool interlace_allowed;
496 bool doublescan_allowed;
497 struct list_head modes; /* list of modes on this connector */
498
499 int initial_x, initial_y;
500 enum drm_connector_status status;
501
502 /* these are modes added by probing with DDC or the BIOS */
503 struct list_head probed_modes;
504
505 struct drm_display_info display_info;
506 const struct drm_connector_funcs *funcs;
507
508 struct list_head user_modes;
509 struct drm_property_blob *edid_blob_ptr;
510 u32 property_ids[DRM_CONNECTOR_MAX_PROPERTY];
511 uint64_t property_values[DRM_CONNECTOR_MAX_PROPERTY];
512
513 uint8_t polled; /* DRM_CONNECTOR_POLL_* */
514
515 /* requested DPMS state */
516 int dpms;
517
518 void *helper_private;
519
520 /* forced on connector */
521 enum drm_connector_force force;
522 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
523 uint32_t force_encoder_id;
524 struct drm_encoder *encoder; /* currently active encoder */
525
526 int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
527};
528
529/**
530 * struct drm_mode_set
531 *
532 * Represents a single crtc the connectors that it drives with what mode
533 * and from which framebuffer it scans out from.
534 *
535 * This is used to set modes.
536 */
537struct drm_mode_set {
538 struct list_head head;
539
540 struct drm_framebuffer *fb;
541 struct drm_crtc *crtc;
542 struct drm_display_mode *mode;
543
544 uint32_t x;
545 uint32_t y;
546
547 struct drm_connector **connectors;
548 size_t num_connectors;
549};
550
551/**
552 * struct drm_mode_config_funcs - configure CRTCs for a given screen layout
553 */
554struct drm_mode_config_funcs {
555 struct drm_framebuffer *(*fb_create)(struct drm_device *dev, struct drm_file *file_priv, struct drm_mode_fb_cmd *mode_cmd);
556 void (*output_poll_changed)(struct drm_device *dev);
557};
558
559struct drm_mode_group {
560 uint32_t num_crtcs;
561 uint32_t num_encoders;
562 uint32_t num_connectors;
563
564 /* list of object IDs for this group */
565 uint32_t *id_list;
566};
567
568/**
569 * drm_mode_config - Mode configuration control structure
570 *
571 */
572struct drm_mode_config {
573 struct mutex mutex; /* protects configuration (mode lists etc.) */
574 struct mutex idr_mutex; /* for IDR management */
575 struct idr crtc_idr; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
576 /* this is limited to one for now */
577 int num_fb;
578 struct list_head fb_list;
579 int num_connector;
580 struct list_head connector_list;
581 int num_encoder;
582 struct list_head encoder_list;
583
584 int num_crtc;
585 struct list_head crtc_list;
586
587 struct list_head property_list;
588
589 int min_width, min_height;
590 int max_width, max_height;
591 struct drm_mode_config_funcs *funcs;
592 resource_size_t fb_base;
593
594 /* output poll support */
595 bool poll_enabled;
596 struct delayed_work output_poll_work;
597
598 /* pointers to standard properties */
599 struct list_head property_blob_list;
600 struct drm_property *edid_property;
601 struct drm_property *dpms_property;
602
603 /* DVI-I properties */
604 struct drm_property *dvi_i_subconnector_property;
605 struct drm_property *dvi_i_select_subconnector_property;
606
607 /* TV properties */
608 struct drm_property *tv_subconnector_property;
609 struct drm_property *tv_select_subconnector_property;
610 struct drm_property *tv_mode_property;
611 struct drm_property *tv_left_margin_property;
612 struct drm_property *tv_right_margin_property;
613 struct drm_property *tv_top_margin_property;
614 struct drm_property *tv_bottom_margin_property;
615 struct drm_property *tv_brightness_property;
616 struct drm_property *tv_contrast_property;
617 struct drm_property *tv_flicker_reduction_property;
618 struct drm_property *tv_overscan_property;
619 struct drm_property *tv_saturation_property;
620 struct drm_property *tv_hue_property;
621
622 /* Optional properties */
623 struct drm_property *scaling_mode_property;
624 struct drm_property *dithering_mode_property;
625 struct drm_property *dirty_info_property;
626};
627
628#define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
629#define obj_to_connector(x) container_of(x, struct drm_connector, base)
630#define obj_to_encoder(x) container_of(x, struct drm_encoder, base)
631#define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
632#define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
633#define obj_to_property(x) container_of(x, struct drm_property, base)
634#define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
635
636
637extern void drm_crtc_init(struct drm_device *dev,
638 struct drm_crtc *crtc,
639 const struct drm_crtc_funcs *funcs);
640extern void drm_crtc_cleanup(struct drm_crtc *crtc);
641
642extern void drm_connector_init(struct drm_device *dev,
643 struct drm_connector *connector,
644 const struct drm_connector_funcs *funcs,
645 int connector_type);
646
647extern void drm_connector_cleanup(struct drm_connector *connector);
648
649extern void drm_encoder_init(struct drm_device *dev,
650 struct drm_encoder *encoder,
651 const struct drm_encoder_funcs *funcs,
652 int encoder_type);
653
654extern void drm_encoder_cleanup(struct drm_encoder *encoder);
655
656extern char *drm_get_connector_name(struct drm_connector *connector);
657extern char *drm_get_dpms_name(int val);
658extern char *drm_get_dvi_i_subconnector_name(int val);
659extern char *drm_get_dvi_i_select_name(int val);
660extern char *drm_get_tv_subconnector_name(int val);
661extern char *drm_get_tv_select_name(int val);
662extern void drm_fb_release(struct drm_file *file_priv);
663extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group);
664extern struct edid *drm_get_edid(struct drm_connector *connector,
665 struct i2c_adapter *adapter);
666extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
667extern void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
668extern void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode);
669extern struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
670 const struct drm_display_mode *mode);
671extern void drm_mode_debug_printmodeline(struct drm_display_mode *mode);
672extern void drm_mode_config_init(struct drm_device *dev);
673extern void drm_mode_config_reset(struct drm_device *dev);
674extern void drm_mode_config_cleanup(struct drm_device *dev);
675extern void drm_mode_set_name(struct drm_display_mode *mode);
676extern bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2);
677extern int drm_mode_width(struct drm_display_mode *mode);
678extern int drm_mode_height(struct drm_display_mode *mode);
679
680/* for us by fb module */
681extern int drm_mode_attachmode_crtc(struct drm_device *dev,
682 struct drm_crtc *crtc,
683 struct drm_display_mode *mode);
684extern int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode);
685
686extern struct drm_display_mode *drm_mode_create(struct drm_device *dev);
687extern void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
688extern void drm_mode_list_concat(struct list_head *head,
689 struct list_head *new);
690extern void drm_mode_validate_size(struct drm_device *dev,
691 struct list_head *mode_list,
692 int maxX, int maxY, int maxPitch);
693extern void drm_mode_prune_invalid(struct drm_device *dev,
694 struct list_head *mode_list, bool verbose);
695extern void drm_mode_sort(struct list_head *mode_list);
696extern int drm_mode_hsync(const struct drm_display_mode *mode);
697extern int drm_mode_vrefresh(const struct drm_display_mode *mode);
698extern void drm_mode_set_crtcinfo(struct drm_display_mode *p,
699 int adjust_flags);
700extern void drm_mode_connector_list_update(struct drm_connector *connector);
701extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
702 struct edid *edid);
703extern int drm_connector_property_set_value(struct drm_connector *connector,
704 struct drm_property *property,
705 uint64_t value);
706extern int drm_connector_property_get_value(struct drm_connector *connector,
707 struct drm_property *property,
708 uint64_t *value);
709extern struct drm_display_mode *drm_crtc_mode_create(struct drm_device *dev);
710extern void drm_framebuffer_set_object(struct drm_device *dev,
711 unsigned long handle);
712extern int drm_framebuffer_init(struct drm_device *dev,
713 struct drm_framebuffer *fb,
714 const struct drm_framebuffer_funcs *funcs);
715extern void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
716extern int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc);
717extern int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb);
718extern void drm_crtc_probe_connector_modes(struct drm_device *dev, int maxX, int maxY);
719extern bool drm_crtc_in_use(struct drm_crtc *crtc);
720
721extern int drm_connector_attach_property(struct drm_connector *connector,
722 struct drm_property *property, uint64_t init_val);
723extern struct drm_property *drm_property_create(struct drm_device *dev, int flags,
724 const char *name, int num_values);
725extern void drm_property_destroy(struct drm_device *dev, struct drm_property *property);
726extern int drm_property_add_enum(struct drm_property *property, int index,
727 uint64_t value, const char *name);
728extern int drm_mode_create_dvi_i_properties(struct drm_device *dev);
729extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats,
730 char *formats[]);
731extern int drm_mode_create_scaling_mode_property(struct drm_device *dev);
732extern int drm_mode_create_dithering_property(struct drm_device *dev);
733extern int drm_mode_create_dirty_info_property(struct drm_device *dev);
734extern char *drm_get_encoder_name(struct drm_encoder *encoder);
735
736extern int drm_mode_connector_attach_encoder(struct drm_connector *connector,
737 struct drm_encoder *encoder);
738extern void drm_mode_connector_detach_encoder(struct drm_connector *connector,
739 struct drm_encoder *encoder);
740extern bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
741 int gamma_size);
742extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
743 uint32_t id, uint32_t type);
744/* IOCTLs */
745extern int drm_mode_getresources(struct drm_device *dev,
746 void *data, struct drm_file *file_priv);
747
748extern int drm_mode_getcrtc(struct drm_device *dev,
749 void *data, struct drm_file *file_priv);
750extern int drm_mode_getconnector(struct drm_device *dev,
751 void *data, struct drm_file *file_priv);
752extern int drm_mode_setcrtc(struct drm_device *dev,
753 void *data, struct drm_file *file_priv);
754extern int drm_mode_cursor_ioctl(struct drm_device *dev,
755 void *data, struct drm_file *file_priv);
756extern int drm_mode_addfb(struct drm_device *dev,
757 void *data, struct drm_file *file_priv);
758extern int drm_mode_rmfb(struct drm_device *dev,
759 void *data, struct drm_file *file_priv);
760extern int drm_mode_getfb(struct drm_device *dev,
761 void *data, struct drm_file *file_priv);
762extern int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
763 void *data, struct drm_file *file_priv);
764extern int drm_mode_addmode_ioctl(struct drm_device *dev,
765 void *data, struct drm_file *file_priv);
766extern int drm_mode_rmmode_ioctl(struct drm_device *dev,
767 void *data, struct drm_file *file_priv);
768extern int drm_mode_attachmode_ioctl(struct drm_device *dev,
769 void *data, struct drm_file *file_priv);
770extern int drm_mode_detachmode_ioctl(struct drm_device *dev,
771 void *data, struct drm_file *file_priv);
772
773extern int drm_mode_getproperty_ioctl(struct drm_device *dev,
774 void *data, struct drm_file *file_priv);
775extern int drm_mode_getblob_ioctl(struct drm_device *dev,
776 void *data, struct drm_file *file_priv);
777extern int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
778 void *data, struct drm_file *file_priv);
779extern int drm_mode_hotplug_ioctl(struct drm_device *dev,
780 void *data, struct drm_file *file_priv);
781extern int drm_mode_replacefb(struct drm_device *dev,
782 void *data, struct drm_file *file_priv);
783extern int drm_mode_getencoder(struct drm_device *dev,
784 void *data, struct drm_file *file_priv);
785extern int drm_mode_gamma_get_ioctl(struct drm_device *dev,
786 void *data, struct drm_file *file_priv);
787extern int drm_mode_gamma_set_ioctl(struct drm_device *dev,
788 void *data, struct drm_file *file_priv);
789extern u8 *drm_find_cea_extension(struct edid *edid);
790extern bool drm_detect_hdmi_monitor(struct edid *edid);
791extern bool drm_detect_monitor_audio(struct edid *edid);
792extern int drm_mode_page_flip_ioctl(struct drm_device *dev,
793 void *data, struct drm_file *file_priv);
794extern struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
795 int hdisplay, int vdisplay, int vrefresh,
796 bool reduced, bool interlaced, bool margins);
797extern struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
798 int hdisplay, int vdisplay, int vrefresh,
799 bool interlaced, int margins);
800extern struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
801 int hdisplay, int vdisplay, int vrefresh,
802 bool interlaced, int margins, int GTF_M,
803 int GTF_2C, int GTF_K, int GTF_2J);
804extern int drm_add_modes_noedid(struct drm_connector *connector,
805 int hdisplay, int vdisplay);
806
807extern int drm_edid_header_is_valid(const u8 *raw_edid);
808extern bool drm_edid_is_valid(struct edid *edid);
809struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
810 int hsize, int vsize, int fresh);
811
812extern int drm_mode_create_dumb_ioctl(struct drm_device *dev,
813 void *data, struct drm_file *file_priv);
814extern int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
815 void *data, struct drm_file *file_priv);
816extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
817 void *data, struct drm_file *file_priv);
818#endif /* __DRM_CRTC_H__ */
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/fb.h>
32#include <linux/hdmi.h>
33#include <linux/media-bus-format.h>
34#include <uapi/drm/drm_mode.h>
35#include <uapi/drm/drm_fourcc.h>
36#include <drm/drm_modeset_lock.h>
37#include <drm/drm_rect.h>
38#include <drm/drm_mode_object.h>
39#include <drm/drm_framebuffer.h>
40#include <drm/drm_modes.h>
41#include <drm/drm_connector.h>
42#include <drm/drm_device.h>
43#include <drm/drm_property.h>
44#include <drm/drm_edid.h>
45#include <drm/drm_plane.h>
46#include <drm/drm_blend.h>
47#include <drm/drm_color_mgmt.h>
48#include <drm/drm_debugfs_crc.h>
49#include <drm/drm_mode_config.h>
50
51struct drm_device;
52struct drm_mode_set;
53struct drm_file;
54struct drm_clip_rect;
55struct drm_printer;
56struct drm_self_refresh_data;
57struct device_node;
58struct dma_fence;
59struct edid;
60
61static inline int64_t U642I64(uint64_t val)
62{
63 return (int64_t)*((int64_t *)&val);
64}
65static inline uint64_t I642U64(int64_t val)
66{
67 return (uint64_t)*((uint64_t *)&val);
68}
69
70struct drm_crtc;
71struct drm_pending_vblank_event;
72struct drm_plane;
73struct drm_bridge;
74struct drm_atomic_state;
75
76struct drm_crtc_helper_funcs;
77struct drm_plane_helper_funcs;
78
79/**
80 * struct drm_crtc_state - mutable CRTC state
81 *
82 * Note that the distinction between @enable and @active is rather subtle:
83 * Flipping @active while @enable is set without changing anything else may
84 * never return in a failure from the &drm_mode_config_funcs.atomic_check
85 * callback. Userspace assumes that a DPMS On will always succeed. In other
86 * words: @enable controls resource assignment, @active controls the actual
87 * hardware state.
88 *
89 * The three booleans active_changed, connectors_changed and mode_changed are
90 * intended to indicate whether a full modeset is needed, rather than strictly
91 * describing what has changed in a commit. See also:
92 * drm_atomic_crtc_needs_modeset()
93 *
94 * WARNING: Transitional helpers (like drm_helper_crtc_mode_set() or
95 * drm_helper_crtc_mode_set_base()) do not maintain many of the derived control
96 * state like @plane_mask so drivers not converted over to atomic helpers should
97 * not rely on these being accurate!
98 */
99struct drm_crtc_state {
100 /** @crtc: backpointer to the CRTC */
101 struct drm_crtc *crtc;
102
103 /**
104 * @enable: Whether the CRTC should be enabled, gates all other state.
105 * This controls reservations of shared resources. Actual hardware state
106 * is controlled by @active.
107 */
108 bool enable;
109
110 /**
111 * @active: Whether the CRTC is actively displaying (used for DPMS).
112 * Implies that @enable is set. The driver must not release any shared
113 * resources if @active is set to false but @enable still true, because
114 * userspace expects that a DPMS ON always succeeds.
115 *
116 * Hence drivers must not consult @active in their various
117 * &drm_mode_config_funcs.atomic_check callback to reject an atomic
118 * commit. They can consult it to aid in the computation of derived
119 * hardware state, since even in the DPMS OFF state the display hardware
120 * should be as much powered down as when the CRTC is completely
121 * disabled through setting @enable to false.
122 */
123 bool active;
124
125 /**
126 * @planes_changed: Planes on this crtc are updated. Used by the atomic
127 * helpers and drivers to steer the atomic commit control flow.
128 */
129 bool planes_changed : 1;
130
131 /**
132 * @mode_changed: @mode or @enable has been changed. Used by the atomic
133 * helpers and drivers to steer the atomic commit control flow. See also
134 * drm_atomic_crtc_needs_modeset().
135 *
136 * Drivers are supposed to set this for any CRTC state changes that
137 * require a full modeset. They can also reset it to false if e.g. a
138 * @mode change can be done without a full modeset by only changing
139 * scaler settings.
140 */
141 bool mode_changed : 1;
142
143 /**
144 * @active_changed: @active has been toggled. Used by the atomic
145 * helpers and drivers to steer the atomic commit control flow. See also
146 * drm_atomic_crtc_needs_modeset().
147 */
148 bool active_changed : 1;
149
150 /**
151 * @connectors_changed: Connectors to this crtc have been updated,
152 * either in their state or routing. Used by the atomic
153 * helpers and drivers to steer the atomic commit control flow. See also
154 * drm_atomic_crtc_needs_modeset().
155 *
156 * Drivers are supposed to set this as-needed from their own atomic
157 * check code, e.g. from &drm_encoder_helper_funcs.atomic_check
158 */
159 bool connectors_changed : 1;
160 /**
161 * @zpos_changed: zpos values of planes on this crtc have been updated.
162 * Used by the atomic helpers and drivers to steer the atomic commit
163 * control flow.
164 */
165 bool zpos_changed : 1;
166 /**
167 * @color_mgmt_changed: Color management properties have changed
168 * (@gamma_lut, @degamma_lut or @ctm). Used by the atomic helpers and
169 * drivers to steer the atomic commit control flow.
170 */
171 bool color_mgmt_changed : 1;
172
173 /**
174 * @no_vblank:
175 *
176 * Reflects the ability of a CRTC to send VBLANK events. This state
177 * usually depends on the pipeline configuration. If set to true, DRM
178 * atomic helpers will send out a fake VBLANK event during display
179 * updates after all hardware changes have been committed. This is
180 * implemented in drm_atomic_helper_fake_vblank().
181 *
182 * One usage is for drivers and/or hardware without support for VBLANK
183 * interrupts. Such drivers typically do not initialize vblanking
184 * (i.e., call drm_vblank_init() with the number of CRTCs). For CRTCs
185 * without initialized vblanking, this field is set to true in
186 * drm_atomic_helper_check_modeset(), and a fake VBLANK event will be
187 * send out on each update of the display pipeline by
188 * drm_atomic_helper_fake_vblank().
189 *
190 * Another usage is CRTCs feeding a writeback connector operating in
191 * oneshot mode. In this case the fake VBLANK event is only generated
192 * when a job is queued to the writeback connector, and we want the
193 * core to fake VBLANK events when this part of the pipeline hasn't
194 * changed but others had or when the CRTC and connectors are being
195 * disabled.
196 *
197 * __drm_atomic_helper_crtc_duplicate_state() will not reset the value
198 * from the current state, the CRTC driver is then responsible for
199 * updating this field when needed.
200 *
201 * Note that the combination of &drm_crtc_state.event == NULL and
202 * &drm_crtc_state.no_blank == true is valid and usually used when the
203 * writeback connector attached to the CRTC has a new job queued. In
204 * this case the driver will send the VBLANK event on its own when the
205 * writeback job is complete.
206 */
207 bool no_vblank : 1;
208
209 /**
210 * @plane_mask: Bitmask of drm_plane_mask(plane) of planes attached to
211 * this CRTC.
212 */
213 u32 plane_mask;
214
215 /**
216 * @connector_mask: Bitmask of drm_connector_mask(connector) of
217 * connectors attached to this CRTC.
218 */
219 u32 connector_mask;
220
221 /**
222 * @encoder_mask: Bitmask of drm_encoder_mask(encoder) of encoders
223 * attached to this CRTC.
224 */
225 u32 encoder_mask;
226
227 /**
228 * @adjusted_mode:
229 *
230 * Internal display timings which can be used by the driver to handle
231 * differences between the mode requested by userspace in @mode and what
232 * is actually programmed into the hardware.
233 *
234 * For drivers using &drm_bridge, this stores hardware display timings
235 * used between the CRTC and the first bridge. For other drivers, the
236 * meaning of the adjusted_mode field is purely driver implementation
237 * defined information, and will usually be used to store the hardware
238 * display timings used between the CRTC and encoder blocks.
239 */
240 struct drm_display_mode adjusted_mode;
241
242 /**
243 * @mode:
244 *
245 * Display timings requested by userspace. The driver should try to
246 * match the refresh rate as close as possible (but note that it's
247 * undefined what exactly is close enough, e.g. some of the HDMI modes
248 * only differ in less than 1% of the refresh rate). The active width
249 * and height as observed by userspace for positioning planes must match
250 * exactly.
251 *
252 * For external connectors where the sink isn't fixed (like with a
253 * built-in panel), this mode here should match the physical mode on the
254 * wire to the last details (i.e. including sync polarities and
255 * everything).
256 */
257 struct drm_display_mode mode;
258
259 /**
260 * @mode_blob: &drm_property_blob for @mode, for exposing the mode to
261 * atomic userspace.
262 */
263 struct drm_property_blob *mode_blob;
264
265 /**
266 * @degamma_lut:
267 *
268 * Lookup table for converting framebuffer pixel data before apply the
269 * color conversion matrix @ctm. See drm_crtc_enable_color_mgmt(). The
270 * blob (if not NULL) is an array of &struct drm_color_lut.
271 */
272 struct drm_property_blob *degamma_lut;
273
274 /**
275 * @ctm:
276 *
277 * Color transformation matrix. See drm_crtc_enable_color_mgmt(). The
278 * blob (if not NULL) is a &struct drm_color_ctm.
279 */
280 struct drm_property_blob *ctm;
281
282 /**
283 * @gamma_lut:
284 *
285 * Lookup table for converting pixel data after the color conversion
286 * matrix @ctm. See drm_crtc_enable_color_mgmt(). The blob (if not
287 * NULL) is an array of &struct drm_color_lut.
288 */
289 struct drm_property_blob *gamma_lut;
290
291 /**
292 * @target_vblank:
293 *
294 * Target vertical blank period when a page flip
295 * should take effect.
296 */
297 u32 target_vblank;
298
299 /**
300 * @async_flip:
301 *
302 * This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy
303 * PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL itself yet.
304 */
305 bool async_flip;
306
307 /**
308 * @vrr_enabled:
309 *
310 * Indicates if variable refresh rate should be enabled for the CRTC.
311 * Support for the requested vrr state will depend on driver and
312 * hardware capabiltiy - lacking support is not treated as failure.
313 */
314 bool vrr_enabled;
315
316 /**
317 * @self_refresh_active:
318 *
319 * Used by the self refresh helpers to denote when a self refresh
320 * transition is occurring. This will be set on enable/disable callbacks
321 * when self refresh is being enabled or disabled. In some cases, it may
322 * not be desirable to fully shut off the crtc during self refresh.
323 * CRTC's can inspect this flag and determine the best course of action.
324 */
325 bool self_refresh_active;
326
327 /**
328 * @event:
329 *
330 * Optional pointer to a DRM event to signal upon completion of the
331 * state update. The driver must send out the event when the atomic
332 * commit operation completes. There are two cases:
333 *
334 * - The event is for a CRTC which is being disabled through this
335 * atomic commit. In that case the event can be send out any time
336 * after the hardware has stopped scanning out the current
337 * framebuffers. It should contain the timestamp and counter for the
338 * last vblank before the display pipeline was shut off. The simplest
339 * way to achieve that is calling drm_crtc_send_vblank_event()
340 * somewhen after drm_crtc_vblank_off() has been called.
341 *
342 * - For a CRTC which is enabled at the end of the commit (even when it
343 * undergoes an full modeset) the vblank timestamp and counter must
344 * be for the vblank right before the first frame that scans out the
345 * new set of buffers. Again the event can only be sent out after the
346 * hardware has stopped scanning out the old buffers.
347 *
348 * - Events for disabled CRTCs are not allowed, and drivers can ignore
349 * that case.
350 *
351 * For very simple hardware without VBLANK interrupt, enabling
352 * &struct drm_crtc_state.no_vblank makes DRM's atomic commit helpers
353 * send a fake VBLANK event at the end of the display update after all
354 * hardware changes have been applied. See
355 * drm_atomic_helper_fake_vblank().
356 *
357 * For more complex hardware this
358 * can be handled by the drm_crtc_send_vblank_event() function,
359 * which the driver should call on the provided event upon completion of
360 * the atomic commit. Note that if the driver supports vblank signalling
361 * and timestamping the vblank counters and timestamps must agree with
362 * the ones returned from page flip events. With the current vblank
363 * helper infrastructure this can be achieved by holding a vblank
364 * reference while the page flip is pending, acquired through
365 * drm_crtc_vblank_get() and released with drm_crtc_vblank_put().
366 * Drivers are free to implement their own vblank counter and timestamp
367 * tracking though, e.g. if they have accurate timestamp registers in
368 * hardware.
369 *
370 * For hardware which supports some means to synchronize vblank
371 * interrupt delivery with committing display state there's also
372 * drm_crtc_arm_vblank_event(). See the documentation of that function
373 * for a detailed discussion of the constraints it needs to be used
374 * safely.
375 *
376 * If the device can't notify of flip completion in a race-free way
377 * at all, then the event should be armed just after the page flip is
378 * committed. In the worst case the driver will send the event to
379 * userspace one frame too late. This doesn't allow for a real atomic
380 * update, but it should avoid tearing.
381 */
382 struct drm_pending_vblank_event *event;
383
384 /**
385 * @commit:
386 *
387 * This tracks how the commit for this update proceeds through the
388 * various phases. This is never cleared, except when we destroy the
389 * state, so that subsequent commits can synchronize with previous ones.
390 */
391 struct drm_crtc_commit *commit;
392
393 /** @state: backpointer to global drm_atomic_state */
394 struct drm_atomic_state *state;
395};
396
397/**
398 * struct drm_crtc_funcs - control CRTCs for a given device
399 *
400 * The drm_crtc_funcs structure is the central CRTC management structure
401 * in the DRM. Each CRTC controls one or more connectors (note that the name
402 * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc.
403 * connectors, not just CRTs).
404 *
405 * Each driver is responsible for filling out this structure at startup time,
406 * in addition to providing other modesetting features, like i2c and DDC
407 * bus accessors.
408 */
409struct drm_crtc_funcs {
410 /**
411 * @reset:
412 *
413 * Reset CRTC hardware and software state to off. This function isn't
414 * called by the core directly, only through drm_mode_config_reset().
415 * It's not a helper hook only for historical reasons.
416 *
417 * Atomic drivers can use drm_atomic_helper_crtc_reset() to reset
418 * atomic state using this hook.
419 */
420 void (*reset)(struct drm_crtc *crtc);
421
422 /**
423 * @cursor_set:
424 *
425 * Update the cursor image. The cursor position is relative to the CRTC
426 * and can be partially or fully outside of the visible area.
427 *
428 * Note that contrary to all other KMS functions the legacy cursor entry
429 * points don't take a framebuffer object, but instead take directly a
430 * raw buffer object id from the driver's buffer manager (which is
431 * either GEM or TTM for current drivers).
432 *
433 * This entry point is deprecated, drivers should instead implement
434 * universal plane support and register a proper cursor plane using
435 * drm_crtc_init_with_planes().
436 *
437 * This callback is optional
438 *
439 * RETURNS:
440 *
441 * 0 on success or a negative error code on failure.
442 */
443 int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv,
444 uint32_t handle, uint32_t width, uint32_t height);
445
446 /**
447 * @cursor_set2:
448 *
449 * Update the cursor image, including hotspot information. The hotspot
450 * must not affect the cursor position in CRTC coordinates, but is only
451 * meant as a hint for virtualized display hardware to coordinate the
452 * guests and hosts cursor position. The cursor hotspot is relative to
453 * the cursor image. Otherwise this works exactly like @cursor_set.
454 *
455 * This entry point is deprecated, drivers should instead implement
456 * universal plane support and register a proper cursor plane using
457 * drm_crtc_init_with_planes().
458 *
459 * This callback is optional.
460 *
461 * RETURNS:
462 *
463 * 0 on success or a negative error code on failure.
464 */
465 int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv,
466 uint32_t handle, uint32_t width, uint32_t height,
467 int32_t hot_x, int32_t hot_y);
468
469 /**
470 * @cursor_move:
471 *
472 * Update the cursor position. The cursor does not need to be visible
473 * when this hook is called.
474 *
475 * This entry point is deprecated, drivers should instead implement
476 * universal plane support and register a proper cursor plane using
477 * drm_crtc_init_with_planes().
478 *
479 * This callback is optional.
480 *
481 * RETURNS:
482 *
483 * 0 on success or a negative error code on failure.
484 */
485 int (*cursor_move)(struct drm_crtc *crtc, int x, int y);
486
487 /**
488 * @gamma_set:
489 *
490 * Set gamma on the CRTC.
491 *
492 * This callback is optional.
493 *
494 * Atomic drivers who want to support gamma tables should implement the
495 * atomic color management support, enabled by calling
496 * drm_crtc_enable_color_mgmt(), which then supports the legacy gamma
497 * interface through the drm_atomic_helper_legacy_gamma_set()
498 * compatibility implementation.
499 */
500 int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
501 uint32_t size,
502 struct drm_modeset_acquire_ctx *ctx);
503
504 /**
505 * @destroy:
506 *
507 * Clean up CRTC resources. This is only called at driver unload time
508 * through drm_mode_config_cleanup() since a CRTC cannot be hotplugged
509 * in DRM.
510 */
511 void (*destroy)(struct drm_crtc *crtc);
512
513 /**
514 * @set_config:
515 *
516 * This is the main legacy entry point to change the modeset state on a
517 * CRTC. All the details of the desired configuration are passed in a
518 * &struct drm_mode_set - see there for details.
519 *
520 * Drivers implementing atomic modeset should use
521 * drm_atomic_helper_set_config() to implement this hook.
522 *
523 * RETURNS:
524 *
525 * 0 on success or a negative error code on failure.
526 */
527 int (*set_config)(struct drm_mode_set *set,
528 struct drm_modeset_acquire_ctx *ctx);
529
530 /**
531 * @page_flip:
532 *
533 * Legacy entry point to schedule a flip to the given framebuffer.
534 *
535 * Page flipping is a synchronization mechanism that replaces the frame
536 * buffer being scanned out by the CRTC with a new frame buffer during
537 * vertical blanking, avoiding tearing (except when requested otherwise
538 * through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application
539 * requests a page flip the DRM core verifies that the new frame buffer
540 * is large enough to be scanned out by the CRTC in the currently
541 * configured mode and then calls this hook with a pointer to the new
542 * frame buffer.
543 *
544 * The driver must wait for any pending rendering to the new framebuffer
545 * to complete before executing the flip. It should also wait for any
546 * pending rendering from other drivers if the underlying buffer is a
547 * shared dma-buf.
548 *
549 * An application can request to be notified when the page flip has
550 * completed. The drm core will supply a &struct drm_event in the event
551 * parameter in this case. This can be handled by the
552 * drm_crtc_send_vblank_event() function, which the driver should call on
553 * the provided event upon completion of the flip. Note that if
554 * the driver supports vblank signalling and timestamping the vblank
555 * counters and timestamps must agree with the ones returned from page
556 * flip events. With the current vblank helper infrastructure this can
557 * be achieved by holding a vblank reference while the page flip is
558 * pending, acquired through drm_crtc_vblank_get() and released with
559 * drm_crtc_vblank_put(). Drivers are free to implement their own vblank
560 * counter and timestamp tracking though, e.g. if they have accurate
561 * timestamp registers in hardware.
562 *
563 * This callback is optional.
564 *
565 * NOTE:
566 *
567 * Very early versions of the KMS ABI mandated that the driver must
568 * block (but not reject) any rendering to the old framebuffer until the
569 * flip operation has completed and the old framebuffer is no longer
570 * visible. This requirement has been lifted, and userspace is instead
571 * expected to request delivery of an event and wait with recycling old
572 * buffers until such has been received.
573 *
574 * RETURNS:
575 *
576 * 0 on success or a negative error code on failure. Note that if a
577 * page flip operation is already pending the callback should return
578 * -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode
579 * or just runtime disabled through DPMS respectively the new atomic
580 * "ACTIVE" state) should result in an -EINVAL error code. Note that
581 * drm_atomic_helper_page_flip() checks this already for atomic drivers.
582 */
583 int (*page_flip)(struct drm_crtc *crtc,
584 struct drm_framebuffer *fb,
585 struct drm_pending_vblank_event *event,
586 uint32_t flags,
587 struct drm_modeset_acquire_ctx *ctx);
588
589 /**
590 * @page_flip_target:
591 *
592 * Same as @page_flip but with an additional parameter specifying the
593 * absolute target vertical blank period (as reported by
594 * drm_crtc_vblank_count()) when the flip should take effect.
595 *
596 * Note that the core code calls drm_crtc_vblank_get before this entry
597 * point, and will call drm_crtc_vblank_put if this entry point returns
598 * any non-0 error code. It's the driver's responsibility to call
599 * drm_crtc_vblank_put after this entry point returns 0, typically when
600 * the flip completes.
601 */
602 int (*page_flip_target)(struct drm_crtc *crtc,
603 struct drm_framebuffer *fb,
604 struct drm_pending_vblank_event *event,
605 uint32_t flags, uint32_t target,
606 struct drm_modeset_acquire_ctx *ctx);
607
608 /**
609 * @set_property:
610 *
611 * This is the legacy entry point to update a property attached to the
612 * CRTC.
613 *
614 * This callback is optional if the driver does not support any legacy
615 * driver-private properties. For atomic drivers it is not used because
616 * property handling is done entirely in the DRM core.
617 *
618 * RETURNS:
619 *
620 * 0 on success or a negative error code on failure.
621 */
622 int (*set_property)(struct drm_crtc *crtc,
623 struct drm_property *property, uint64_t val);
624
625 /**
626 * @atomic_duplicate_state:
627 *
628 * Duplicate the current atomic state for this CRTC and return it.
629 * The core and helpers guarantee that any atomic state duplicated with
630 * this hook and still owned by the caller (i.e. not transferred to the
631 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
632 * cleaned up by calling the @atomic_destroy_state hook in this
633 * structure.
634 *
635 * This callback is mandatory for atomic drivers.
636 *
637 * Atomic drivers which don't subclass &struct drm_crtc_state should use
638 * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the
639 * state structure to extend it with driver-private state should use
640 * __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is
641 * duplicated in a consistent fashion across drivers.
642 *
643 * It is an error to call this hook before &drm_crtc.state has been
644 * initialized correctly.
645 *
646 * NOTE:
647 *
648 * If the duplicate state references refcounted resources this hook must
649 * acquire a reference for each of them. The driver must release these
650 * references again in @atomic_destroy_state.
651 *
652 * RETURNS:
653 *
654 * Duplicated atomic state or NULL when the allocation failed.
655 */
656 struct drm_crtc_state *(*atomic_duplicate_state)(struct drm_crtc *crtc);
657
658 /**
659 * @atomic_destroy_state:
660 *
661 * Destroy a state duplicated with @atomic_duplicate_state and release
662 * or unreference all resources it references
663 *
664 * This callback is mandatory for atomic drivers.
665 */
666 void (*atomic_destroy_state)(struct drm_crtc *crtc,
667 struct drm_crtc_state *state);
668
669 /**
670 * @atomic_set_property:
671 *
672 * Decode a driver-private property value and store the decoded value
673 * into the passed-in state structure. Since the atomic core decodes all
674 * standardized properties (even for extensions beyond the core set of
675 * properties which might not be implemented by all drivers) this
676 * requires drivers to subclass the state structure.
677 *
678 * Such driver-private properties should really only be implemented for
679 * truly hardware/vendor specific state. Instead it is preferred to
680 * standardize atomic extension and decode the properties used to expose
681 * such an extension in the core.
682 *
683 * Do not call this function directly, use
684 * drm_atomic_crtc_set_property() instead.
685 *
686 * This callback is optional if the driver does not support any
687 * driver-private atomic properties.
688 *
689 * NOTE:
690 *
691 * This function is called in the state assembly phase of atomic
692 * modesets, which can be aborted for any reason (including on
693 * userspace's request to just check whether a configuration would be
694 * possible). Drivers MUST NOT touch any persistent state (hardware or
695 * software) or data structures except the passed in @state parameter.
696 *
697 * Also since userspace controls in which order properties are set this
698 * function must not do any input validation (since the state update is
699 * incomplete and hence likely inconsistent). Instead any such input
700 * validation must be done in the various atomic_check callbacks.
701 *
702 * RETURNS:
703 *
704 * 0 if the property has been found, -EINVAL if the property isn't
705 * implemented by the driver (which should never happen, the core only
706 * asks for properties attached to this CRTC). No other validation is
707 * allowed by the driver. The core already checks that the property
708 * value is within the range (integer, valid enum value, ...) the driver
709 * set when registering the property.
710 */
711 int (*atomic_set_property)(struct drm_crtc *crtc,
712 struct drm_crtc_state *state,
713 struct drm_property *property,
714 uint64_t val);
715 /**
716 * @atomic_get_property:
717 *
718 * Reads out the decoded driver-private property. This is used to
719 * implement the GETCRTC IOCTL.
720 *
721 * Do not call this function directly, use
722 * drm_atomic_crtc_get_property() instead.
723 *
724 * This callback is optional if the driver does not support any
725 * driver-private atomic properties.
726 *
727 * RETURNS:
728 *
729 * 0 on success, -EINVAL if the property isn't implemented by the
730 * driver (which should never happen, the core only asks for
731 * properties attached to this CRTC).
732 */
733 int (*atomic_get_property)(struct drm_crtc *crtc,
734 const struct drm_crtc_state *state,
735 struct drm_property *property,
736 uint64_t *val);
737
738 /**
739 * @late_register:
740 *
741 * This optional hook can be used to register additional userspace
742 * interfaces attached to the crtc like debugfs interfaces.
743 * It is called late in the driver load sequence from drm_dev_register().
744 * Everything added from this callback should be unregistered in
745 * the early_unregister callback.
746 *
747 * Returns:
748 *
749 * 0 on success, or a negative error code on failure.
750 */
751 int (*late_register)(struct drm_crtc *crtc);
752
753 /**
754 * @early_unregister:
755 *
756 * This optional hook should be used to unregister the additional
757 * userspace interfaces attached to the crtc from
758 * @late_register. It is called from drm_dev_unregister(),
759 * early in the driver unload sequence to disable userspace access
760 * before data structures are torndown.
761 */
762 void (*early_unregister)(struct drm_crtc *crtc);
763
764 /**
765 * @set_crc_source:
766 *
767 * Changes the source of CRC checksums of frames at the request of
768 * userspace, typically for testing purposes. The sources available are
769 * specific of each driver and a %NULL value indicates that CRC
770 * generation is to be switched off.
771 *
772 * When CRC generation is enabled, the driver should call
773 * drm_crtc_add_crc_entry() at each frame, providing any information
774 * that characterizes the frame contents in the crcN arguments, as
775 * provided from the configured source. Drivers must accept an "auto"
776 * source name that will select a default source for this CRTC.
777 *
778 * This may trigger an atomic modeset commit if necessary, to enable CRC
779 * generation.
780 *
781 * Note that "auto" can depend upon the current modeset configuration,
782 * e.g. it could pick an encoder or output specific CRC sampling point.
783 *
784 * This callback is optional if the driver does not support any CRC
785 * generation functionality.
786 *
787 * RETURNS:
788 *
789 * 0 on success or a negative error code on failure.
790 */
791 int (*set_crc_source)(struct drm_crtc *crtc, const char *source);
792
793 /**
794 * @verify_crc_source:
795 *
796 * verifies the source of CRC checksums of frames before setting the
797 * source for CRC and during crc open. Source parameter can be NULL
798 * while disabling crc source.
799 *
800 * This callback is optional if the driver does not support any CRC
801 * generation functionality.
802 *
803 * RETURNS:
804 *
805 * 0 on success or a negative error code on failure.
806 */
807 int (*verify_crc_source)(struct drm_crtc *crtc, const char *source,
808 size_t *values_cnt);
809 /**
810 * @get_crc_sources:
811 *
812 * Driver callback for getting a list of all the available sources for
813 * CRC generation. This callback depends upon verify_crc_source, So
814 * verify_crc_source callback should be implemented before implementing
815 * this. Driver can pass full list of available crc sources, this
816 * callback does the verification on each crc-source before passing it
817 * to userspace.
818 *
819 * This callback is optional if the driver does not support exporting of
820 * possible CRC sources list.
821 *
822 * RETURNS:
823 *
824 * a constant character pointer to the list of all the available CRC
825 * sources. On failure driver should return NULL. count should be
826 * updated with number of sources in list. if zero we don't process any
827 * source from the list.
828 */
829 const char *const *(*get_crc_sources)(struct drm_crtc *crtc,
830 size_t *count);
831
832 /**
833 * @atomic_print_state:
834 *
835 * If driver subclasses &struct drm_crtc_state, it should implement
836 * this optional hook for printing additional driver specific state.
837 *
838 * Do not call this directly, use drm_atomic_crtc_print_state()
839 * instead.
840 */
841 void (*atomic_print_state)(struct drm_printer *p,
842 const struct drm_crtc_state *state);
843
844 /**
845 * @get_vblank_counter:
846 *
847 * Driver callback for fetching a raw hardware vblank counter for the
848 * CRTC. It's meant to be used by new drivers as the replacement of
849 * &drm_driver.get_vblank_counter hook.
850 *
851 * This callback is optional. If a device doesn't have a hardware
852 * counter, the driver can simply leave the hook as NULL. The DRM core
853 * will account for missed vblank events while interrupts where disabled
854 * based on system timestamps.
855 *
856 * Wraparound handling and loss of events due to modesetting is dealt
857 * with in the DRM core code, as long as drivers call
858 * drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or
859 * enabling a CRTC.
860 *
861 * See also &drm_device.vblank_disable_immediate and
862 * &drm_device.max_vblank_count.
863 *
864 * Returns:
865 *
866 * Raw vblank counter value.
867 */
868 u32 (*get_vblank_counter)(struct drm_crtc *crtc);
869
870 /**
871 * @enable_vblank:
872 *
873 * Enable vblank interrupts for the CRTC. It's meant to be used by
874 * new drivers as the replacement of &drm_driver.enable_vblank hook.
875 *
876 * Returns:
877 *
878 * Zero on success, appropriate errno if the vblank interrupt cannot
879 * be enabled.
880 */
881 int (*enable_vblank)(struct drm_crtc *crtc);
882
883 /**
884 * @disable_vblank:
885 *
886 * Disable vblank interrupts for the CRTC. It's meant to be used by
887 * new drivers as the replacement of &drm_driver.disable_vblank hook.
888 */
889 void (*disable_vblank)(struct drm_crtc *crtc);
890
891 /**
892 * @get_vblank_timestamp:
893 *
894 * Called by drm_get_last_vbltimestamp(). Should return a precise
895 * timestamp when the most recent vblank interval ended or will end.
896 *
897 * Specifically, the timestamp in @vblank_time should correspond as
898 * closely as possible to the time when the first video scanline of
899 * the video frame after the end of vblank will start scanning out,
900 * the time immediately after end of the vblank interval. If the
901 * @crtc is currently inside vblank, this will be a time in the future.
902 * If the @crtc is currently scanning out a frame, this will be the
903 * past start time of the current scanout. This is meant to adhere
904 * to the OpenML OML_sync_control extension specification.
905 *
906 * Parameters:
907 *
908 * crtc:
909 * CRTC for which timestamp should be returned.
910 * max_error:
911 * Maximum allowable timestamp error in nanoseconds.
912 * Implementation should strive to provide timestamp
913 * with an error of at most max_error nanoseconds.
914 * Returns true upper bound on error for timestamp.
915 * vblank_time:
916 * Target location for returned vblank timestamp.
917 * in_vblank_irq:
918 * True when called from drm_crtc_handle_vblank(). Some drivers
919 * need to apply some workarounds for gpu-specific vblank irq quirks
920 * if flag is set.
921 *
922 * Returns:
923 *
924 * True on success, false on failure, which means the core should
925 * fallback to a simple timestamp taken in drm_crtc_handle_vblank().
926 */
927 bool (*get_vblank_timestamp)(struct drm_crtc *crtc,
928 int *max_error,
929 ktime_t *vblank_time,
930 bool in_vblank_irq);
931};
932
933/**
934 * struct drm_crtc - central CRTC control structure
935 *
936 * Each CRTC may have one or more connectors associated with it. This structure
937 * allows the CRTC to be controlled.
938 */
939struct drm_crtc {
940 /** @dev: parent DRM device */
941 struct drm_device *dev;
942 /** @port: OF node used by drm_of_find_possible_crtcs(). */
943 struct device_node *port;
944 /**
945 * @head:
946 *
947 * List of all CRTCs on @dev, linked from &drm_mode_config.crtc_list.
948 * Invariant over the lifetime of @dev and therefore does not need
949 * locking.
950 */
951 struct list_head head;
952
953 /** @name: human readable name, can be overwritten by the driver */
954 char *name;
955
956 /**
957 * @mutex:
958 *
959 * This provides a read lock for the overall CRTC state (mode, dpms
960 * state, ...) and a write lock for everything which can be update
961 * without a full modeset (fb, cursor data, CRTC properties ...). A full
962 * modeset also need to grab &drm_mode_config.connection_mutex.
963 *
964 * For atomic drivers specifically this protects @state.
965 */
966 struct drm_modeset_lock mutex;
967
968 /** @base: base KMS object for ID tracking etc. */
969 struct drm_mode_object base;
970
971 /**
972 * @primary:
973 * Primary plane for this CRTC. Note that this is only
974 * relevant for legacy IOCTL, it specifies the plane implicitly used by
975 * the SETCRTC and PAGE_FLIP IOCTLs. It does not have any significance
976 * beyond that.
977 */
978 struct drm_plane *primary;
979
980 /**
981 * @cursor:
982 * Cursor plane for this CRTC. Note that this is only relevant for
983 * legacy IOCTL, it specifies the plane implicitly used by the SETCURSOR
984 * and SETCURSOR2 IOCTLs. It does not have any significance
985 * beyond that.
986 */
987 struct drm_plane *cursor;
988
989 /**
990 * @index: Position inside the mode_config.list, can be used as an array
991 * index. It is invariant over the lifetime of the CRTC.
992 */
993 unsigned index;
994
995 /**
996 * @cursor_x: Current x position of the cursor, used for universal
997 * cursor planes because the SETCURSOR IOCTL only can update the
998 * framebuffer without supplying the coordinates. Drivers should not use
999 * this directly, atomic drivers should look at &drm_plane_state.crtc_x
1000 * of the cursor plane instead.
1001 */
1002 int cursor_x;
1003 /**
1004 * @cursor_y: Current y position of the cursor, used for universal
1005 * cursor planes because the SETCURSOR IOCTL only can update the
1006 * framebuffer without supplying the coordinates. Drivers should not use
1007 * this directly, atomic drivers should look at &drm_plane_state.crtc_y
1008 * of the cursor plane instead.
1009 */
1010 int cursor_y;
1011
1012 /**
1013 * @enabled:
1014 *
1015 * Is this CRTC enabled? Should only be used by legacy drivers, atomic
1016 * drivers should instead consult &drm_crtc_state.enable and
1017 * &drm_crtc_state.active. Atomic drivers can update this by calling
1018 * drm_atomic_helper_update_legacy_modeset_state().
1019 */
1020 bool enabled;
1021
1022 /**
1023 * @mode:
1024 *
1025 * Current mode timings. Should only be used by legacy drivers, atomic
1026 * drivers should instead consult &drm_crtc_state.mode. Atomic drivers
1027 * can update this by calling
1028 * drm_atomic_helper_update_legacy_modeset_state().
1029 */
1030 struct drm_display_mode mode;
1031
1032 /**
1033 * @hwmode:
1034 *
1035 * Programmed mode in hw, after adjustments for encoders, crtc, panel
1036 * scaling etc. Should only be used by legacy drivers, for high
1037 * precision vblank timestamps in
1038 * drm_crtc_vblank_helper_get_vblank_timestamp().
1039 *
1040 * Note that atomic drivers should not use this, but instead use
1041 * &drm_crtc_state.adjusted_mode. And for high-precision timestamps
1042 * drm_crtc_vblank_helper_get_vblank_timestamp() used
1043 * &drm_vblank_crtc.hwmode,
1044 * which is filled out by calling drm_calc_timestamping_constants().
1045 */
1046 struct drm_display_mode hwmode;
1047
1048 /**
1049 * @x:
1050 * x position on screen. Should only be used by legacy drivers, atomic
1051 * drivers should look at &drm_plane_state.crtc_x of the primary plane
1052 * instead. Updated by calling
1053 * drm_atomic_helper_update_legacy_modeset_state().
1054 */
1055 int x;
1056 /**
1057 * @y:
1058 * y position on screen. Should only be used by legacy drivers, atomic
1059 * drivers should look at &drm_plane_state.crtc_y of the primary plane
1060 * instead. Updated by calling
1061 * drm_atomic_helper_update_legacy_modeset_state().
1062 */
1063 int y;
1064
1065 /** @funcs: CRTC control functions */
1066 const struct drm_crtc_funcs *funcs;
1067
1068 /**
1069 * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up
1070 * by calling drm_mode_crtc_set_gamma_size().
1071 */
1072 uint32_t gamma_size;
1073
1074 /**
1075 * @gamma_store: Gamma ramp values used by the legacy SETGAMMA and
1076 * GETGAMMA IOCTls. Set up by calling drm_mode_crtc_set_gamma_size().
1077 */
1078 uint16_t *gamma_store;
1079
1080 /** @helper_private: mid-layer private data */
1081 const struct drm_crtc_helper_funcs *helper_private;
1082
1083 /** @properties: property tracking for this CRTC */
1084 struct drm_object_properties properties;
1085
1086 /**
1087 * @state:
1088 *
1089 * Current atomic state for this CRTC.
1090 *
1091 * This is protected by @mutex. Note that nonblocking atomic commits
1092 * access the current CRTC state without taking locks. Either by going
1093 * through the &struct drm_atomic_state pointers, see
1094 * for_each_oldnew_crtc_in_state(), for_each_old_crtc_in_state() and
1095 * for_each_new_crtc_in_state(). Or through careful ordering of atomic
1096 * commit operations as implemented in the atomic helpers, see
1097 * &struct drm_crtc_commit.
1098 */
1099 struct drm_crtc_state *state;
1100
1101 /**
1102 * @commit_list:
1103 *
1104 * List of &drm_crtc_commit structures tracking pending commits.
1105 * Protected by @commit_lock. This list holds its own full reference,
1106 * as does the ongoing commit.
1107 *
1108 * "Note that the commit for a state change is also tracked in
1109 * &drm_crtc_state.commit. For accessing the immediately preceding
1110 * commit in an atomic update it is recommended to just use that
1111 * pointer in the old CRTC state, since accessing that doesn't need
1112 * any locking or list-walking. @commit_list should only be used to
1113 * stall for framebuffer cleanup that's signalled through
1114 * &drm_crtc_commit.cleanup_done."
1115 */
1116 struct list_head commit_list;
1117
1118 /**
1119 * @commit_lock:
1120 *
1121 * Spinlock to protect @commit_list.
1122 */
1123 spinlock_t commit_lock;
1124
1125#ifdef CONFIG_DEBUG_FS
1126 /**
1127 * @debugfs_entry:
1128 *
1129 * Debugfs directory for this CRTC.
1130 */
1131 struct dentry *debugfs_entry;
1132#endif
1133
1134 /**
1135 * @crc:
1136 *
1137 * Configuration settings of CRC capture.
1138 */
1139 struct drm_crtc_crc crc;
1140
1141 /**
1142 * @fence_context:
1143 *
1144 * timeline context used for fence operations.
1145 */
1146 unsigned int fence_context;
1147
1148 /**
1149 * @fence_lock:
1150 *
1151 * spinlock to protect the fences in the fence_context.
1152 */
1153 spinlock_t fence_lock;
1154 /**
1155 * @fence_seqno:
1156 *
1157 * Seqno variable used as monotonic counter for the fences
1158 * created on the CRTC's timeline.
1159 */
1160 unsigned long fence_seqno;
1161
1162 /**
1163 * @timeline_name:
1164 *
1165 * The name of the CRTC's fence timeline.
1166 */
1167 char timeline_name[32];
1168
1169 /**
1170 * @self_refresh_data: Holds the state for the self refresh helpers
1171 *
1172 * Initialized via drm_self_refresh_helper_init().
1173 */
1174 struct drm_self_refresh_data *self_refresh_data;
1175};
1176
1177/**
1178 * struct drm_mode_set - new values for a CRTC config change
1179 * @fb: framebuffer to use for new config
1180 * @crtc: CRTC whose configuration we're about to change
1181 * @mode: mode timings to use
1182 * @x: position of this CRTC relative to @fb
1183 * @y: position of this CRTC relative to @fb
1184 * @connectors: array of connectors to drive with this CRTC if possible
1185 * @num_connectors: size of @connectors array
1186 *
1187 * This represents a modeset configuration for the legacy SETCRTC ioctl and is
1188 * also used internally. Atomic drivers instead use &drm_atomic_state.
1189 */
1190struct drm_mode_set {
1191 struct drm_framebuffer *fb;
1192 struct drm_crtc *crtc;
1193 struct drm_display_mode *mode;
1194
1195 uint32_t x;
1196 uint32_t y;
1197
1198 struct drm_connector **connectors;
1199 size_t num_connectors;
1200};
1201
1202#define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
1203
1204__printf(6, 7)
1205int drm_crtc_init_with_planes(struct drm_device *dev,
1206 struct drm_crtc *crtc,
1207 struct drm_plane *primary,
1208 struct drm_plane *cursor,
1209 const struct drm_crtc_funcs *funcs,
1210 const char *name, ...);
1211void drm_crtc_cleanup(struct drm_crtc *crtc);
1212
1213/**
1214 * drm_crtc_index - find the index of a registered CRTC
1215 * @crtc: CRTC to find index for
1216 *
1217 * Given a registered CRTC, return the index of that CRTC within a DRM
1218 * device's list of CRTCs.
1219 */
1220static inline unsigned int drm_crtc_index(const struct drm_crtc *crtc)
1221{
1222 return crtc->index;
1223}
1224
1225/**
1226 * drm_crtc_mask - find the mask of a registered CRTC
1227 * @crtc: CRTC to find mask for
1228 *
1229 * Given a registered CRTC, return the mask bit of that CRTC for the
1230 * &drm_encoder.possible_crtcs and &drm_plane.possible_crtcs fields.
1231 */
1232static inline uint32_t drm_crtc_mask(const struct drm_crtc *crtc)
1233{
1234 return 1 << drm_crtc_index(crtc);
1235}
1236
1237int drm_mode_set_config_internal(struct drm_mode_set *set);
1238struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx);
1239
1240/**
1241 * drm_crtc_find - look up a CRTC object from its ID
1242 * @dev: DRM device
1243 * @file_priv: drm file to check for lease against.
1244 * @id: &drm_mode_object ID
1245 *
1246 * This can be used to look up a CRTC from its userspace ID. Only used by
1247 * drivers for legacy IOCTLs and interface, nowadays extensions to the KMS
1248 * userspace interface should be done using &drm_property.
1249 */
1250static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev,
1251 struct drm_file *file_priv,
1252 uint32_t id)
1253{
1254 struct drm_mode_object *mo;
1255 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CRTC);
1256 return mo ? obj_to_crtc(mo) : NULL;
1257}
1258
1259/**
1260 * drm_for_each_crtc - iterate over all CRTCs
1261 * @crtc: a &struct drm_crtc as the loop cursor
1262 * @dev: the &struct drm_device
1263 *
1264 * Iterate over all CRTCs of @dev.
1265 */
1266#define drm_for_each_crtc(crtc, dev) \
1267 list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head)
1268
1269#endif /* __DRM_CRTC_H__ */