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"
37 * Detailed mode info for 800x600@60Hz
39 static struct drm_display_mode std_modes
[] = {
40 { DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT
, 40000, 800, 840,
41 968, 1056, 0, 600, 601, 605, 628, 0,
42 DRM_MODE_FLAG_PHSYNC
| DRM_MODE_FLAG_PVSYNC
) },
45 static void drm_mode_validate_flag(struct drm_connector
*connector
,
48 struct drm_display_mode
*mode
, *t
;
50 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
))
53 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
54 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
55 !(flags
& DRM_MODE_FLAG_INTERLACE
))
56 mode
->status
= MODE_NO_INTERLACE
;
57 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
58 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
59 mode
->status
= MODE_NO_DBLESCAN
;
66 * drm_helper_probe_connector_modes - get complete set of display modes
68 * @maxX: max width for modes
69 * @maxY: max height for modes
72 * Caller must hold mode config lock.
74 * Based on @dev's mode_config layout, scan all the connectors and try to detect
75 * modes on them. Modes will first be added to the connector's probed_modes
76 * list, then culled (based on validity and the @maxX, @maxY parameters) and
77 * put into the normal modes list.
79 * Intended to be used either at bootup time or when major configuration
80 * changes have occurred.
82 * FIXME: take into account monitor limits
85 * Number of modes found on @connector.
87 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
88 uint32_t maxX
, uint32_t maxY
)
90 struct drm_device
*dev
= connector
->dev
;
91 struct drm_display_mode
*mode
, *t
;
92 struct drm_connector_helper_funcs
*connector_funcs
=
93 connector
->helper_private
;
97 DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector
));
98 /* set all modes to the unverified state */
99 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
)
100 mode
->status
= MODE_UNVERIFIED
;
102 connector
->status
= connector
->funcs
->detect(connector
);
104 if (connector
->status
== connector_status_disconnected
) {
105 DRM_DEBUG_KMS("%s is disconnected\n",
106 drm_get_connector_name(connector
));
107 /* TODO set EDID to NULL */
111 count
= (*connector_funcs
->get_modes
)(connector
);
115 drm_mode_connector_list_update(connector
);
118 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
121 if (connector
->interlace_allowed
)
122 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
123 if (connector
->doublescan_allowed
)
124 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
125 drm_mode_validate_flag(connector
, mode_flags
);
127 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
128 if (mode
->status
== MODE_OK
)
129 mode
->status
= connector_funcs
->mode_valid(connector
,
134 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
136 if (list_empty(&connector
->modes
))
139 drm_mode_sort(&connector
->modes
);
141 DRM_DEBUG_KMS("Probed modes for %s\n",
142 drm_get_connector_name(connector
));
143 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
144 mode
->vrefresh
= drm_mode_vrefresh(mode
);
146 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
147 drm_mode_debug_printmodeline(mode
);
152 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
154 int drm_helper_probe_connector_modes(struct drm_device
*dev
, uint32_t maxX
,
157 struct drm_connector
*connector
;
160 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
161 count
+= drm_helper_probe_single_connector_modes(connector
,
167 EXPORT_SYMBOL(drm_helper_probe_connector_modes
);
169 static void drm_helper_add_std_modes(struct drm_device
*dev
,
170 struct drm_connector
*connector
)
172 struct drm_display_mode
*mode
, *t
;
175 for (i
= 0; i
< ARRAY_SIZE(std_modes
); i
++) {
176 struct drm_display_mode
*stdmode
;
179 * When no valid EDID modes are available we end up
180 * here and bailed in the past, now we add some standard
183 stdmode
= drm_mode_duplicate(dev
, &std_modes
[i
]);
184 drm_mode_probed_add(connector
, stdmode
);
185 drm_mode_list_concat(&connector
->probed_modes
,
188 DRM_DEBUG_KMS("Adding mode %s to %s\n", stdmode
->name
,
189 drm_get_connector_name(connector
));
191 drm_mode_sort(&connector
->modes
);
193 DRM_DEBUG_KMS("Added std modes on %s\n",
194 drm_get_connector_name(connector
));
195 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
196 mode
->vrefresh
= drm_mode_vrefresh(mode
);
198 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
199 drm_mode_debug_printmodeline(mode
);
204 * drm_helper_encoder_in_use - check if a given encoder is in use
205 * @encoder: encoder to check
208 * Caller must hold mode config lock.
210 * Walk @encoders's DRM device's mode_config and see if it's in use.
213 * True if @encoder is part of the mode_config, false otherwise.
215 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
217 struct drm_connector
*connector
;
218 struct drm_device
*dev
= encoder
->dev
;
219 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
220 if (connector
->encoder
== encoder
)
224 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
227 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
228 * @crtc: CRTC to check
231 * Caller must hold mode config lock.
233 * Walk @crtc's DRM device's mode_config and see if it's in use.
236 * True if @crtc is part of the mode_config, false otherwise.
238 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
240 struct drm_encoder
*encoder
;
241 struct drm_device
*dev
= crtc
->dev
;
242 /* FIXME: Locking around list access? */
243 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
244 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
248 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
251 * drm_disable_unused_functions - disable unused objects
255 * Caller must hold mode config lock.
257 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
258 * by calling its dpms function, which should power it off.
260 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
262 struct drm_encoder
*encoder
;
263 struct drm_encoder_helper_funcs
*encoder_funcs
;
264 struct drm_crtc
*crtc
;
266 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
267 encoder_funcs
= encoder
->helper_private
;
268 if (!drm_helper_encoder_in_use(encoder
))
269 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
272 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
273 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
274 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
275 if (!crtc
->enabled
) {
276 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
281 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
283 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_connector
*connector
, int width
, int height
)
285 struct drm_display_mode
*mode
;
287 list_for_each_entry(mode
, &connector
->modes
, head
) {
288 if (drm_mode_width(mode
) > width
||
289 drm_mode_height(mode
) > height
)
291 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
297 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
302 enable
= connector
->status
== connector_status_connected
;
304 enable
= connector
->status
!= connector_status_disconnected
;
309 static void drm_enable_connectors(struct drm_device
*dev
, bool *enabled
)
311 bool any_enabled
= false;
312 struct drm_connector
*connector
;
315 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
316 enabled
[i
] = drm_connector_enabled(connector
, true);
317 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector
->base
.id
,
318 enabled
[i
] ? "yes" : "no");
319 any_enabled
|= enabled
[i
];
327 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
328 enabled
[i
] = drm_connector_enabled(connector
, false);
333 static bool drm_target_preferred(struct drm_device
*dev
,
334 struct drm_display_mode
**modes
,
335 bool *enabled
, int width
, int height
)
337 struct drm_connector
*connector
;
340 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
342 if (enabled
[i
] == false) {
347 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
350 modes
[i
] = drm_has_preferred_mode(connector
, width
, height
);
351 /* No preferred modes, pick one off the list */
352 if (!modes
[i
] && !list_empty(&connector
->modes
)) {
353 list_for_each_entry(modes
[i
], &connector
->modes
, head
)
356 DRM_DEBUG_KMS("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
363 static int drm_pick_crtcs(struct drm_device
*dev
,
364 struct drm_crtc
**best_crtcs
,
365 struct drm_display_mode
**modes
,
366 int n
, int width
, int height
)
369 struct drm_connector
*connector
;
370 struct drm_connector_helper_funcs
*connector_funcs
;
371 struct drm_encoder
*encoder
;
372 struct drm_crtc
*best_crtc
;
373 int my_score
, best_score
, score
;
374 struct drm_crtc
**crtcs
, *crtc
;
376 if (n
== dev
->mode_config
.num_connector
)
379 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
385 best_crtcs
[n
] = NULL
;
387 best_score
= drm_pick_crtcs(dev
, best_crtcs
, modes
, n
+1, width
, height
);
388 if (modes
[n
] == NULL
)
391 crtcs
= kmalloc(dev
->mode_config
.num_connector
*
392 sizeof(struct drm_crtc
*), GFP_KERNEL
);
397 if (connector
->status
== connector_status_connected
)
399 if (drm_has_preferred_mode(connector
, width
, height
))
402 connector_funcs
= connector
->helper_private
;
403 encoder
= connector_funcs
->best_encoder(connector
);
407 connector
->encoder
= encoder
;
409 /* select a crtc for this connector and then attempt to configure
410 remaining connectors */
412 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
414 if ((connector
->encoder
->possible_crtcs
& (1 << c
)) == 0) {
419 for (o
= 0; o
< n
; o
++)
420 if (best_crtcs
[o
] == crtc
)
424 /* ignore cloning for now */
430 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_crtc
*));
431 score
= my_score
+ drm_pick_crtcs(dev
, crtcs
, modes
, n
+ 1,
433 if (score
> best_score
) {
436 memcpy(best_crtcs
, crtcs
,
437 dev
->mode_config
.num_connector
*
438 sizeof(struct drm_crtc
*));
447 static void drm_setup_crtcs(struct drm_device
*dev
)
449 struct drm_crtc
**crtcs
;
450 struct drm_display_mode
**modes
;
451 struct drm_encoder
*encoder
;
452 struct drm_connector
*connector
;
459 width
= dev
->mode_config
.max_width
;
460 height
= dev
->mode_config
.max_height
;
462 /* clean out all the encoder/crtc combos */
463 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
464 encoder
->crtc
= NULL
;
467 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
468 sizeof(struct drm_crtc
*), GFP_KERNEL
);
469 modes
= kcalloc(dev
->mode_config
.num_connector
,
470 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
471 enabled
= kcalloc(dev
->mode_config
.num_connector
,
472 sizeof(bool), GFP_KERNEL
);
474 drm_enable_connectors(dev
, enabled
);
476 ret
= drm_target_preferred(dev
, modes
, enabled
, width
, height
);
478 DRM_ERROR("Unable to find initial modes\n");
480 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width
, height
);
482 drm_pick_crtcs(dev
, crtcs
, modes
, 0, width
, height
);
485 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
486 struct drm_display_mode
*mode
= modes
[i
];
487 struct drm_crtc
*crtc
= crtcs
[i
];
489 if (connector
->encoder
== NULL
) {
495 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
496 mode
->name
, crtc
->base
.id
);
497 crtc
->desired_mode
= mode
;
498 connector
->encoder
->crtc
= crtc
;
500 connector
->encoder
->crtc
= NULL
;
510 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
511 * @encoder: encoder to test
512 * @crtc: crtc to test
514 * Return false if @encoder can't be driven by @crtc, true otherwise.
516 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
517 struct drm_crtc
*crtc
)
519 struct drm_device
*dev
;
520 struct drm_crtc
*tmp
;
523 WARN(!crtc
, "checking null crtc?");
527 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
533 if (encoder
->possible_crtcs
& crtc_mask
)
539 * Check the CRTC we're going to map each output to vs. its current
540 * CRTC. If they don't match, we have to disable the output and the CRTC
541 * since the driver will have to re-route things.
544 drm_crtc_prepare_encoders(struct drm_device
*dev
)
546 struct drm_encoder_helper_funcs
*encoder_funcs
;
547 struct drm_encoder
*encoder
;
549 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
550 encoder_funcs
= encoder
->helper_private
;
551 /* Disable unused encoders */
552 if (encoder
->crtc
== NULL
)
553 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
554 /* Disable encoders whose CRTC is about to change */
555 if (encoder_funcs
->get_crtc
&&
556 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
557 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
562 * drm_crtc_set_mode - set a mode
563 * @crtc: CRTC to program
569 * Caller must hold mode config lock.
571 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
572 * to fixup or reject the mode prior to trying to set it.
575 * True if the mode was set successfully, or false otherwise.
577 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
578 struct drm_display_mode
*mode
,
580 struct drm_framebuffer
*old_fb
)
582 struct drm_device
*dev
= crtc
->dev
;
583 struct drm_display_mode
*adjusted_mode
, saved_mode
;
584 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
585 struct drm_encoder_helper_funcs
*encoder_funcs
;
586 int saved_x
, saved_y
;
587 struct drm_encoder
*encoder
;
590 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
592 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
597 saved_mode
= crtc
->mode
;
601 /* Update crtc values up front so the driver can rely on them for mode
608 /* Pass our mode to the connectors and the CRTC to give them a chance to
609 * adjust it according to limitations or connector properties, and also
610 * a chance to reject the mode entirely.
612 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
614 if (encoder
->crtc
!= crtc
)
616 encoder_funcs
= encoder
->helper_private
;
617 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
623 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
627 /* Prepare the encoders and CRTCs before setting the mode. */
628 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
630 if (encoder
->crtc
!= crtc
)
632 encoder_funcs
= encoder
->helper_private
;
633 /* Disable the encoders as the first thing we do. */
634 encoder_funcs
->prepare(encoder
);
637 drm_crtc_prepare_encoders(dev
);
639 crtc_funcs
->prepare(crtc
);
641 /* Set up the DPLL and any encoders state that needs to adjust or depend
644 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
648 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
650 if (encoder
->crtc
!= crtc
)
653 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder
),
654 mode
->name
, mode
->base
.id
);
655 encoder_funcs
= encoder
->helper_private
;
656 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
659 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
660 crtc_funcs
->commit(crtc
);
662 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
664 if (encoder
->crtc
!= crtc
)
667 encoder_funcs
= encoder
->helper_private
;
668 encoder_funcs
->commit(encoder
);
672 /* XXX free adjustedmode */
673 drm_mode_destroy(dev
, adjusted_mode
);
674 /* FIXME: add subpixel order */
677 crtc
->mode
= saved_mode
;
684 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
688 * drm_crtc_helper_set_config - set a new config from userspace
689 * @crtc: CRTC to setup
690 * @crtc_info: user provided configuration
691 * @new_mode: new mode to set
692 * @connector_set: set of connectors for the new config
693 * @fb: new framebuffer
696 * Caller must hold mode config lock.
698 * Setup a new configuration, provided by the user in @crtc_info, and enable
704 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
706 struct drm_device
*dev
;
707 struct drm_crtc
**save_crtcs
, *new_crtc
;
708 struct drm_encoder
**save_encoders
, *new_encoder
;
709 struct drm_framebuffer
*old_fb
= NULL
;
711 bool mode_changed
= false;
712 bool fb_changed
= false;
713 struct drm_connector
*connector
;
714 int count
= 0, ro
, fail
= 0;
715 struct drm_crtc_helper_funcs
*crtc_funcs
;
726 if (!set
->crtc
->helper_private
)
729 crtc_funcs
= set
->crtc
->helper_private
;
731 DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:"
732 " %d (x, y) (%i, %i)\n",
733 set
->crtc
, set
->crtc
->base
.id
, set
->fb
, set
->connectors
,
734 (int)set
->num_connectors
, set
->x
, set
->y
);
736 dev
= set
->crtc
->dev
;
738 /* save previous config */
739 save_enabled
= set
->crtc
->enabled
;
742 * We do mode_config.num_connectors here since we'll look at the
743 * CRTC and encoder associated with each connector later.
745 save_crtcs
= kzalloc(dev
->mode_config
.num_connector
*
746 sizeof(struct drm_crtc
*), GFP_KERNEL
);
750 save_encoders
= kzalloc(dev
->mode_config
.num_connector
*
751 sizeof(struct drm_encoders
*), GFP_KERNEL
);
752 if (!save_encoders
) {
757 /* We should be able to check here if the fb has the same properties
758 * and then just flip_or_move it */
759 if (set
->crtc
->fb
!= set
->fb
) {
760 /* If we have no fb then treat it as a full mode set */
761 if (set
->crtc
->fb
== NULL
) {
762 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
764 } else if ((set
->fb
->bits_per_pixel
!=
765 set
->crtc
->fb
->bits_per_pixel
) ||
766 set
->fb
->depth
!= set
->crtc
->fb
->depth
)
772 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
775 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
776 DRM_DEBUG_KMS("modes are different, full mode set\n");
777 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
778 drm_mode_debug_printmodeline(set
->mode
);
782 /* a) traverse passed in connector list and get encoders for them */
784 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
785 struct drm_connector_helper_funcs
*connector_funcs
=
786 connector
->helper_private
;
787 save_encoders
[count
++] = connector
->encoder
;
788 new_encoder
= connector
->encoder
;
789 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
790 if (set
->connectors
[ro
] == connector
) {
791 new_encoder
= connector_funcs
->best_encoder(connector
);
792 /* if we can't get an encoder for a connector
793 we are setting now - then fail */
794 if (new_encoder
== NULL
)
795 /* don't break so fail path works correct */
801 if (new_encoder
!= connector
->encoder
) {
802 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
804 connector
->encoder
= new_encoder
;
810 goto fail_no_encoder
;
814 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
815 if (!connector
->encoder
)
818 save_crtcs
[count
++] = connector
->encoder
->crtc
;
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_encoders
);
886 set
->crtc
->enabled
= save_enabled
;
887 set
->crtc
->fb
= old_fb
;
889 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
890 if (!connector
->encoder
)
893 connector
->encoder
->crtc
= save_crtcs
[count
++];
898 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
899 connector
->encoder
= save_encoders
[count
++];
901 kfree(save_encoders
);
904 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
906 bool drm_helper_plugged_event(struct drm_device
*dev
)
910 drm_helper_probe_connector_modes(dev
, dev
->mode_config
.max_width
,
911 dev
->mode_config
.max_height
);
913 drm_setup_crtcs(dev
);
915 /* alert the driver fb layer */
916 dev
->mode_config
.funcs
->fb_changed(dev
);
918 /* FIXME: send hotplug event */
922 * drm_initial_config - setup a sane initial connector configuration
926 * Called at init time, must take mode config lock.
928 * Scan the CRTCs and connectors and try to put together an initial setup.
929 * At the moment, this is a cloned configuration across all heads with
930 * a new framebuffer object as the backing store.
933 * Zero if everything went ok, nonzero otherwise.
935 bool drm_helper_initial_config(struct drm_device
*dev
)
937 struct drm_connector
*connector
;
940 count
= drm_helper_probe_connector_modes(dev
,
941 dev
->mode_config
.max_width
,
942 dev
->mode_config
.max_height
);
945 * None of the available connectors had any modes, so add some
946 * and try to light them up anyway
949 DRM_ERROR("connectors have no modes, using standard modes\n");
950 list_for_each_entry(connector
,
951 &dev
->mode_config
.connector_list
,
953 drm_helper_add_std_modes(dev
, connector
);
956 drm_setup_crtcs(dev
);
958 /* alert the driver fb layer */
959 dev
->mode_config
.funcs
->fb_changed(dev
);
963 EXPORT_SYMBOL(drm_helper_initial_config
);
965 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
967 int dpms
= DRM_MODE_DPMS_OFF
;
968 struct drm_connector
*connector
;
969 struct drm_device
*dev
= encoder
->dev
;
971 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
972 if (connector
->encoder
== encoder
)
973 if (connector
->dpms
< dpms
)
974 dpms
= connector
->dpms
;
978 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
980 int dpms
= DRM_MODE_DPMS_OFF
;
981 struct drm_connector
*connector
;
982 struct drm_device
*dev
= crtc
->dev
;
984 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
985 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
986 if (connector
->dpms
< dpms
)
987 dpms
= connector
->dpms
;
992 * drm_helper_connector_dpms
993 * @connector affected connector
996 * Calls the low-level connector DPMS function, then
997 * calls appropriate encoder and crtc DPMS functions as well
999 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
1001 struct drm_encoder
*encoder
= connector
->encoder
;
1002 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
1005 if (mode
== connector
->dpms
)
1008 old_dpms
= connector
->dpms
;
1009 connector
->dpms
= mode
;
1011 /* from off to on, do crtc then encoder */
1012 if (mode
< old_dpms
) {
1014 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
1015 if (crtc_funcs
->dpms
)
1016 (*crtc_funcs
->dpms
) (crtc
,
1017 drm_helper_choose_crtc_dpms(crtc
));
1020 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
1021 if (encoder_funcs
->dpms
)
1022 (*encoder_funcs
->dpms
) (encoder
,
1023 drm_helper_choose_encoder_dpms(encoder
));
1027 /* from on to off, do encoder then crtc */
1028 if (mode
> old_dpms
) {
1030 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
1031 if (encoder_funcs
->dpms
)
1032 (*encoder_funcs
->dpms
) (encoder
,
1033 drm_helper_choose_encoder_dpms(encoder
));
1036 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
1037 if (crtc_funcs
->dpms
)
1038 (*crtc_funcs
->dpms
) (crtc
,
1039 drm_helper_choose_crtc_dpms(crtc
));
1045 EXPORT_SYMBOL(drm_helper_connector_dpms
);
1048 * drm_hotplug_stage_two
1050 * @connector hotpluged connector
1053 * Caller must hold mode config lock, function might grab struct lock.
1055 * Stage two of a hotplug.
1058 * Zero on success, errno on failure.
1060 int drm_helper_hotplug_stage_two(struct drm_device
*dev
)
1062 drm_helper_plugged_event(dev
);
1066 EXPORT_SYMBOL(drm_helper_hotplug_stage_two
);
1068 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
1069 struct drm_mode_fb_cmd
*mode_cmd
)
1071 fb
->width
= mode_cmd
->width
;
1072 fb
->height
= mode_cmd
->height
;
1073 fb
->pitch
= mode_cmd
->pitch
;
1074 fb
->bits_per_pixel
= mode_cmd
->bpp
;
1075 fb
->depth
= mode_cmd
->depth
;
1079 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
1081 int drm_helper_resume_force_mode(struct drm_device
*dev
)
1083 struct drm_crtc
*crtc
;
1086 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1091 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
1092 crtc
->x
, crtc
->y
, crtc
->fb
);
1095 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
1097 /* disable the unused connectors while restoring the modesetting */
1098 drm_helper_disable_unused_functions(dev
);
1101 EXPORT_SYMBOL(drm_helper_resume_force_mode
);