2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 * DRM core CRTC related functions
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
34 #include "drm_crtc_helper.h"
36 static void drm_mode_validate_flag(struct drm_connector
*connector
,
39 struct drm_display_mode
*mode
, *t
;
41 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
))
44 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
45 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
46 !(flags
& DRM_MODE_FLAG_INTERLACE
))
47 mode
->status
= MODE_NO_INTERLACE
;
48 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
49 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
50 mode
->status
= MODE_NO_DBLESCAN
;
57 * drm_helper_probe_connector_modes - get complete set of display modes
59 * @maxX: max width for modes
60 * @maxY: max height for modes
63 * Caller must hold mode config lock.
65 * Based on @dev's mode_config layout, scan all the connectors and try to detect
66 * modes on them. Modes will first be added to the connector's probed_modes
67 * list, then culled (based on validity and the @maxX, @maxY parameters) and
68 * put into the normal modes list.
70 * Intended to be used either at bootup time or when major configuration
71 * changes have occurred.
73 * FIXME: take into account monitor limits
76 * Number of modes found on @connector.
78 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
79 uint32_t maxX
, uint32_t maxY
)
81 struct drm_device
*dev
= connector
->dev
;
82 struct drm_display_mode
*mode
, *t
;
83 struct drm_connector_helper_funcs
*connector_funcs
=
84 connector
->helper_private
;
88 DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector
));
89 /* set all modes to the unverified state */
90 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
)
91 mode
->status
= MODE_UNVERIFIED
;
93 connector
->status
= connector
->funcs
->detect(connector
);
95 if (connector
->status
== connector_status_disconnected
) {
96 DRM_DEBUG_KMS("%s is disconnected\n",
97 drm_get_connector_name(connector
));
101 count
= (*connector_funcs
->get_modes
)(connector
);
103 count
= drm_add_modes_noedid(connector
, 800, 600);
108 drm_mode_connector_list_update(connector
);
111 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
114 if (connector
->interlace_allowed
)
115 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
116 if (connector
->doublescan_allowed
)
117 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
118 drm_mode_validate_flag(connector
, mode_flags
);
120 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
121 if (mode
->status
== MODE_OK
)
122 mode
->status
= connector_funcs
->mode_valid(connector
,
127 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
129 if (list_empty(&connector
->modes
))
132 drm_mode_sort(&connector
->modes
);
134 DRM_DEBUG_KMS("Probed modes for %s\n",
135 drm_get_connector_name(connector
));
136 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
137 mode
->vrefresh
= drm_mode_vrefresh(mode
);
139 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
140 drm_mode_debug_printmodeline(mode
);
145 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
147 int drm_helper_probe_connector_modes(struct drm_device
*dev
, uint32_t maxX
,
150 struct drm_connector
*connector
;
153 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
154 count
+= drm_helper_probe_single_connector_modes(connector
,
160 EXPORT_SYMBOL(drm_helper_probe_connector_modes
);
163 * drm_helper_encoder_in_use - check if a given encoder is in use
164 * @encoder: encoder to check
167 * Caller must hold mode config lock.
169 * Walk @encoders's DRM device's mode_config and see if it's in use.
172 * True if @encoder is part of the mode_config, false otherwise.
174 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
176 struct drm_connector
*connector
;
177 struct drm_device
*dev
= encoder
->dev
;
178 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
179 if (connector
->encoder
== encoder
)
183 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
187 * @crtc: CRTC to check
190 * Caller must hold mode config lock.
192 * Walk @crtc's DRM device's mode_config and see if it's in use.
195 * True if @crtc is part of the mode_config, false otherwise.
197 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
199 struct drm_encoder
*encoder
;
200 struct drm_device
*dev
= crtc
->dev
;
201 /* FIXME: Locking around list access? */
202 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
203 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
207 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
210 * drm_disable_unused_functions - disable unused objects
214 * Caller must hold mode config lock.
216 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
217 * by calling its dpms function, which should power it off.
219 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
221 struct drm_encoder
*encoder
;
222 struct drm_connector
*connector
;
223 struct drm_encoder_helper_funcs
*encoder_funcs
;
224 struct drm_crtc
*crtc
;
226 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
227 if (!connector
->encoder
)
229 if (connector
->status
== connector_status_disconnected
)
230 connector
->encoder
= NULL
;
233 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
234 encoder_funcs
= encoder
->helper_private
;
235 if (!drm_helper_encoder_in_use(encoder
)) {
236 if (encoder_funcs
->disable
)
237 (*encoder_funcs
->disable
)(encoder
);
239 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
240 /* disconnector encoder from any connector */
241 encoder
->crtc
= NULL
;
245 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
246 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
247 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
248 if (!crtc
->enabled
) {
249 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
254 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
256 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_connector
*connector
, int width
, int height
)
258 struct drm_display_mode
*mode
;
260 list_for_each_entry(mode
, &connector
->modes
, head
) {
261 if (drm_mode_width(mode
) > width
||
262 drm_mode_height(mode
) > height
)
264 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
270 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
275 enable
= connector
->status
== connector_status_connected
;
277 enable
= connector
->status
!= connector_status_disconnected
;
282 static void drm_enable_connectors(struct drm_device
*dev
, bool *enabled
)
284 bool any_enabled
= false;
285 struct drm_connector
*connector
;
288 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
289 enabled
[i
] = drm_connector_enabled(connector
, true);
290 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
291 enabled
[i
] ? "yes" : "no");
292 any_enabled
|= enabled
[i
];
300 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
301 enabled
[i
] = drm_connector_enabled(connector
, false);
306 static bool drm_target_preferred(struct drm_device
*dev
,
307 struct drm_display_mode
**modes
,
308 bool *enabled
, int width
, int height
)
310 struct drm_connector
*connector
;
313 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
315 if (enabled
[i
] == false) {
320 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
323 modes
[i
] = drm_has_preferred_mode(connector
, width
, height
);
324 /* No preferred modes, pick one off the list */
325 if (!modes
[i
] && !list_empty(&connector
->modes
)) {
326 list_for_each_entry(modes
[i
], &connector
->modes
, head
)
329 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
336 static int drm_pick_crtcs(struct drm_device
*dev
,
337 struct drm_crtc
**best_crtcs
,
338 struct drm_display_mode
**modes
,
339 int n
, int width
, int height
)
342 struct drm_connector
*connector
;
343 struct drm_connector_helper_funcs
*connector_funcs
;
344 struct drm_encoder
*encoder
;
345 struct drm_crtc
*best_crtc
;
346 int my_score
, best_score
, score
;
347 struct drm_crtc
**crtcs
, *crtc
;
349 if (n
== dev
->mode_config
.num_connector
)
352 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
358 best_crtcs
[n
] = NULL
;
360 best_score
= drm_pick_crtcs(dev
, best_crtcs
, modes
, n
+1, width
, height
);
361 if (modes
[n
] == NULL
)
364 crtcs
= kmalloc(dev
->mode_config
.num_connector
*
365 sizeof(struct drm_crtc
*), GFP_KERNEL
);
370 if (connector
->status
== connector_status_connected
)
372 if (drm_has_preferred_mode(connector
, width
, height
))
375 connector_funcs
= connector
->helper_private
;
376 encoder
= connector_funcs
->best_encoder(connector
);
380 connector
->encoder
= encoder
;
382 /* select a crtc for this connector and then attempt to configure
383 remaining connectors */
385 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
387 if ((encoder
->possible_crtcs
& (1 << c
)) == 0) {
392 for (o
= 0; o
< n
; o
++)
393 if (best_crtcs
[o
] == crtc
)
397 /* ignore cloning for now */
403 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_crtc
*));
404 score
= my_score
+ drm_pick_crtcs(dev
, crtcs
, modes
, n
+ 1,
406 if (score
> best_score
) {
409 memcpy(best_crtcs
, crtcs
,
410 dev
->mode_config
.num_connector
*
411 sizeof(struct drm_crtc
*));
420 static void drm_setup_crtcs(struct drm_device
*dev
)
422 struct drm_crtc
**crtcs
;
423 struct drm_display_mode
**modes
;
424 struct drm_encoder
*encoder
;
425 struct drm_connector
*connector
;
432 width
= dev
->mode_config
.max_width
;
433 height
= dev
->mode_config
.max_height
;
435 /* clean out all the encoder/crtc combos */
436 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
437 encoder
->crtc
= NULL
;
440 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
441 sizeof(struct drm_crtc
*), GFP_KERNEL
);
442 modes
= kcalloc(dev
->mode_config
.num_connector
,
443 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
444 enabled
= kcalloc(dev
->mode_config
.num_connector
,
445 sizeof(bool), GFP_KERNEL
);
447 drm_enable_connectors(dev
, enabled
);
449 ret
= drm_target_preferred(dev
, modes
, enabled
, width
, height
);
451 DRM_ERROR("Unable to find initial modes\n");
453 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
455 drm_pick_crtcs(dev
, crtcs
, modes
, 0, width
, height
);
458 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
459 struct drm_display_mode
*mode
= modes
[i
];
460 struct drm_crtc
*crtc
= crtcs
[i
];
462 if (connector
->encoder
== NULL
) {
468 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
469 mode
->name
, crtc
->base
.id
);
470 crtc
->desired_mode
= mode
;
471 connector
->encoder
->crtc
= crtc
;
473 connector
->encoder
->crtc
= NULL
;
474 connector
->encoder
= NULL
;
485 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
486 * @encoder: encoder to test
487 * @crtc: crtc to test
489 * Return false if @encoder can't be driven by @crtc, true otherwise.
491 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
492 struct drm_crtc
*crtc
)
494 struct drm_device
*dev
;
495 struct drm_crtc
*tmp
;
498 WARN(!crtc
, "checking null crtc?");
502 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
508 if (encoder
->possible_crtcs
& crtc_mask
)
514 * Check the CRTC we're going to map each output to vs. its current
515 * CRTC. If they don't match, we have to disable the output and the CRTC
516 * since the driver will have to re-route things.
519 drm_crtc_prepare_encoders(struct drm_device
*dev
)
521 struct drm_encoder_helper_funcs
*encoder_funcs
;
522 struct drm_encoder
*encoder
;
524 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
525 encoder_funcs
= encoder
->helper_private
;
526 /* Disable unused encoders */
527 if (encoder
->crtc
== NULL
)
528 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
529 /* Disable encoders whose CRTC is about to change */
530 if (encoder_funcs
->get_crtc
&&
531 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
532 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
537 * drm_crtc_set_mode - set a mode
538 * @crtc: CRTC to program
544 * Caller must hold mode config lock.
546 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
547 * to fixup or reject the mode prior to trying to set it.
550 * True if the mode was set successfully, or false otherwise.
552 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
553 struct drm_display_mode
*mode
,
555 struct drm_framebuffer
*old_fb
)
557 struct drm_device
*dev
= crtc
->dev
;
558 struct drm_display_mode
*adjusted_mode
, saved_mode
;
559 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
560 struct drm_encoder_helper_funcs
*encoder_funcs
;
561 int saved_x
, saved_y
;
562 struct drm_encoder
*encoder
;
565 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
567 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
572 saved_mode
= crtc
->mode
;
576 /* Update crtc values up front so the driver can rely on them for mode
583 /* Pass our mode to the connectors and the CRTC to give them a chance to
584 * adjust it according to limitations or connector properties, and also
585 * a chance to reject the mode entirely.
587 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
589 if (encoder
->crtc
!= crtc
)
591 encoder_funcs
= encoder
->helper_private
;
592 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
598 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
602 /* Prepare the encoders and CRTCs before setting the mode. */
603 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
605 if (encoder
->crtc
!= crtc
)
607 encoder_funcs
= encoder
->helper_private
;
608 /* Disable the encoders as the first thing we do. */
609 encoder_funcs
->prepare(encoder
);
612 drm_crtc_prepare_encoders(dev
);
614 crtc_funcs
->prepare(crtc
);
616 /* Set up the DPLL and any encoders state that needs to adjust or depend
619 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
623 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
625 if (encoder
->crtc
!= crtc
)
628 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder
),
629 mode
->name
, mode
->base
.id
);
630 encoder_funcs
= encoder
->helper_private
;
631 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
634 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
635 crtc_funcs
->commit(crtc
);
637 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
639 if (encoder
->crtc
!= crtc
)
642 encoder_funcs
= encoder
->helper_private
;
643 encoder_funcs
->commit(encoder
);
647 /* XXX free adjustedmode */
648 drm_mode_destroy(dev
, adjusted_mode
);
649 /* FIXME: add subpixel order */
652 crtc
->mode
= saved_mode
;
659 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
663 * drm_crtc_helper_set_config - set a new config from userspace
664 * @crtc: CRTC to setup
665 * @crtc_info: user provided configuration
666 * @new_mode: new mode to set
667 * @connector_set: set of connectors for the new config
668 * @fb: new framebuffer
671 * Caller must hold mode config lock.
673 * Setup a new configuration, provided by the user in @crtc_info, and enable
679 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
681 struct drm_device
*dev
;
682 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
683 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
684 struct drm_framebuffer
*old_fb
= NULL
;
685 bool mode_changed
= false; /* if true do a full mode set */
686 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
687 struct drm_connector
*save_connectors
, *connector
;
688 int count
= 0, ro
, fail
= 0;
689 struct drm_crtc_helper_funcs
*crtc_funcs
;
700 if (!set
->crtc
->helper_private
)
703 crtc_funcs
= set
->crtc
->helper_private
;
705 DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:"
706 " %d (x, y) (%i, %i)\n",
707 set
->crtc
, set
->crtc
->base
.id
, set
->fb
, set
->connectors
,
708 (int)set
->num_connectors
, set
->x
, set
->y
);
710 dev
= set
->crtc
->dev
;
712 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
714 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
715 sizeof(struct drm_crtc
), GFP_KERNEL
);
719 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
720 sizeof(struct drm_encoder
), GFP_KERNEL
);
721 if (!save_encoders
) {
726 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
727 sizeof(struct drm_connector
), GFP_KERNEL
);
728 if (!save_connectors
) {
730 kfree(save_encoders
);
734 /* Copy data. Note that driver private data is not affected.
735 * Should anything bad happen only the expected state is
736 * restored, not the drivers personal bookkeeping.
739 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
740 save_crtcs
[count
++] = *crtc
;
744 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
745 save_encoders
[count
++] = *encoder
;
749 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
750 save_connectors
[count
++] = *connector
;
753 /* We should be able to check here if the fb has the same properties
754 * and then just flip_or_move it */
755 if (set
->crtc
->fb
!= set
->fb
) {
756 /* If we have no fb then treat it as a full mode set */
757 if (set
->crtc
->fb
== NULL
) {
758 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
760 } else if (set
->fb
== NULL
) {
762 } else if ((set
->fb
->bits_per_pixel
!=
763 set
->crtc
->fb
->bits_per_pixel
) ||
764 set
->fb
->depth
!= set
->crtc
->fb
->depth
)
770 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
773 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
774 DRM_DEBUG_KMS("modes are different, full mode set\n");
775 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
776 drm_mode_debug_printmodeline(set
->mode
);
780 /* a) traverse passed in connector list and get encoders for them */
782 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
783 struct drm_connector_helper_funcs
*connector_funcs
=
784 connector
->helper_private
;
785 new_encoder
= connector
->encoder
;
786 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
787 if (set
->connectors
[ro
] == connector
) {
788 new_encoder
= connector_funcs
->best_encoder(connector
);
789 /* if we can't get an encoder for a connector
790 we are setting now - then fail */
791 if (new_encoder
== NULL
)
792 /* don't break so fail path works correct */
798 if (new_encoder
!= connector
->encoder
) {
799 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
801 /* If the encoder is reused for another connector, then
802 * the appropriate crtc will be set later.
804 if (connector
->encoder
)
805 connector
->encoder
->crtc
= NULL
;
806 connector
->encoder
= new_encoder
;
816 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
817 if (!connector
->encoder
)
820 if (connector
->encoder
->crtc
== set
->crtc
)
823 new_crtc
= connector
->encoder
->crtc
;
825 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
826 if (set
->connectors
[ro
] == connector
)
827 new_crtc
= set
->crtc
;
830 /* Make sure the new CRTC will work with the encoder */
832 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
836 if (new_crtc
!= connector
->encoder
->crtc
) {
837 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
839 connector
->encoder
->crtc
= new_crtc
;
841 DRM_DEBUG_KMS("setting connector %d crtc to %p\n",
842 connector
->base
.id
, new_crtc
);
845 /* mode_set_base is not a required function */
846 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
850 old_fb
= set
->crtc
->fb
;
851 set
->crtc
->fb
= set
->fb
;
852 set
->crtc
->enabled
= (set
->mode
!= NULL
);
853 if (set
->mode
!= NULL
) {
854 DRM_DEBUG_KMS("attempting to set mode from"
856 drm_mode_debug_printmodeline(set
->mode
);
857 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
860 DRM_ERROR("failed to set mode on crtc %p\n",
865 /* TODO are these needed? */
866 set
->crtc
->desired_x
= set
->x
;
867 set
->crtc
->desired_y
= set
->y
;
868 set
->crtc
->desired_mode
= set
->mode
;
870 drm_helper_disable_unused_functions(dev
);
871 } else if (fb_changed
) {
872 old_fb
= set
->crtc
->fb
;
873 if (set
->crtc
->fb
!= set
->fb
)
874 set
->crtc
->fb
= set
->fb
;
875 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
876 set
->x
, set
->y
, old_fb
);
881 kfree(save_connectors
);
882 kfree(save_encoders
);
887 /* Restore all previous data. */
889 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
890 *crtc
= save_crtcs
[count
++];
894 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
895 *encoder
= save_encoders
[count
++];
899 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
900 *connector
= save_connectors
[count
++];
903 kfree(save_connectors
);
904 kfree(save_encoders
);
908 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
910 bool drm_helper_plugged_event(struct drm_device
*dev
)
914 drm_helper_probe_connector_modes(dev
, dev
->mode_config
.max_width
,
915 dev
->mode_config
.max_height
);
917 drm_setup_crtcs(dev
);
919 /* alert the driver fb layer */
920 dev
->mode_config
.funcs
->fb_changed(dev
);
922 /* FIXME: send hotplug event */
926 * drm_initial_config - setup a sane initial connector configuration
930 * Called at init time, must take mode config lock.
932 * Scan the CRTCs and connectors and try to put together an initial setup.
933 * At the moment, this is a cloned configuration across all heads with
934 * a new framebuffer object as the backing store.
937 * Zero if everything went ok, nonzero otherwise.
939 bool drm_helper_initial_config(struct drm_device
*dev
)
943 count
= drm_helper_probe_connector_modes(dev
,
944 dev
->mode_config
.max_width
,
945 dev
->mode_config
.max_height
);
948 * we shouldn't end up with no modes here.
950 WARN(!count
, "Connected connector with 0 modes\n");
952 drm_setup_crtcs(dev
);
954 /* alert the driver fb layer */
955 dev
->mode_config
.funcs
->fb_changed(dev
);
959 EXPORT_SYMBOL(drm_helper_initial_config
);
961 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
963 int dpms
= DRM_MODE_DPMS_OFF
;
964 struct drm_connector
*connector
;
965 struct drm_device
*dev
= encoder
->dev
;
967 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
968 if (connector
->encoder
== encoder
)
969 if (connector
->dpms
< dpms
)
970 dpms
= connector
->dpms
;
974 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
976 int dpms
= DRM_MODE_DPMS_OFF
;
977 struct drm_connector
*connector
;
978 struct drm_device
*dev
= crtc
->dev
;
980 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
981 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
982 if (connector
->dpms
< dpms
)
983 dpms
= connector
->dpms
;
988 * drm_helper_connector_dpms
989 * @connector affected connector
992 * Calls the low-level connector DPMS function, then
993 * calls appropriate encoder and crtc DPMS functions as well
995 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
997 struct drm_encoder
*encoder
= connector
->encoder
;
998 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
1001 if (mode
== connector
->dpms
)
1004 old_dpms
= connector
->dpms
;
1005 connector
->dpms
= mode
;
1007 /* from off to on, do crtc then encoder */
1008 if (mode
< old_dpms
) {
1010 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
1011 if (crtc_funcs
->dpms
)
1012 (*crtc_funcs
->dpms
) (crtc
,
1013 drm_helper_choose_crtc_dpms(crtc
));
1016 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
1017 if (encoder_funcs
->dpms
)
1018 (*encoder_funcs
->dpms
) (encoder
,
1019 drm_helper_choose_encoder_dpms(encoder
));
1023 /* from on to off, do encoder then crtc */
1024 if (mode
> old_dpms
) {
1026 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
1027 if (encoder_funcs
->dpms
)
1028 (*encoder_funcs
->dpms
) (encoder
,
1029 drm_helper_choose_encoder_dpms(encoder
));
1032 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
1033 if (crtc_funcs
->dpms
)
1034 (*crtc_funcs
->dpms
) (crtc
,
1035 drm_helper_choose_crtc_dpms(crtc
));
1041 EXPORT_SYMBOL(drm_helper_connector_dpms
);
1044 * drm_hotplug_stage_two
1046 * @connector hotpluged connector
1049 * Caller must hold mode config lock, function might grab struct lock.
1051 * Stage two of a hotplug.
1054 * Zero on success, errno on failure.
1056 int drm_helper_hotplug_stage_two(struct drm_device
*dev
)
1058 drm_helper_plugged_event(dev
);
1062 EXPORT_SYMBOL(drm_helper_hotplug_stage_two
);
1064 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
1065 struct drm_mode_fb_cmd
*mode_cmd
)
1067 fb
->width
= mode_cmd
->width
;
1068 fb
->height
= mode_cmd
->height
;
1069 fb
->pitch
= mode_cmd
->pitch
;
1070 fb
->bits_per_pixel
= mode_cmd
->bpp
;
1071 fb
->depth
= mode_cmd
->depth
;
1075 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
1077 int drm_helper_resume_force_mode(struct drm_device
*dev
)
1079 struct drm_crtc
*crtc
;
1082 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1087 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
1088 crtc
->x
, crtc
->y
, crtc
->fb
);
1091 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
1093 /* disable the unused connectors while restoring the modesetting */
1094 drm_helper_disable_unused_functions(dev
);
1097 EXPORT_SYMBOL(drm_helper_resume_force_mode
);