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("%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("%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("Probed modes for %s\n", drm_get_connector_name(connector
));
142 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
143 mode
->vrefresh
= drm_mode_vrefresh(mode
);
145 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
146 drm_mode_debug_printmodeline(mode
);
151 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
153 int drm_helper_probe_connector_modes(struct drm_device
*dev
, uint32_t maxX
,
156 struct drm_connector
*connector
;
159 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
160 count
+= drm_helper_probe_single_connector_modes(connector
,
166 EXPORT_SYMBOL(drm_helper_probe_connector_modes
);
168 static void drm_helper_add_std_modes(struct drm_device
*dev
,
169 struct drm_connector
*connector
)
171 struct drm_display_mode
*mode
, *t
;
174 for (i
= 0; i
< ARRAY_SIZE(std_modes
); i
++) {
175 struct drm_display_mode
*stdmode
;
178 * When no valid EDID modes are available we end up
179 * here and bailed in the past, now we add some standard
182 stdmode
= drm_mode_duplicate(dev
, &std_modes
[i
]);
183 drm_mode_probed_add(connector
, stdmode
);
184 drm_mode_list_concat(&connector
->probed_modes
,
187 DRM_DEBUG("Adding mode %s to %s\n", stdmode
->name
,
188 drm_get_connector_name(connector
));
190 drm_mode_sort(&connector
->modes
);
192 DRM_DEBUG("Added std modes on %s\n", drm_get_connector_name(connector
));
193 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
194 mode
->vrefresh
= drm_mode_vrefresh(mode
);
196 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
197 drm_mode_debug_printmodeline(mode
);
202 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
203 * @crtc: CRTC to check
206 * Caller must hold mode config lock.
208 * Walk @crtc's DRM device's mode_config and see if it's in use.
211 * True if @crtc is part of the mode_config, false otherwise.
213 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
215 struct drm_encoder
*encoder
;
216 struct drm_device
*dev
= crtc
->dev
;
217 /* FIXME: Locking around list access? */
218 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
219 if (encoder
->crtc
== crtc
)
223 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
226 * drm_disable_unused_functions - disable unused objects
230 * Caller must hold mode config lock.
232 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
233 * by calling its dpms function, which should power it off.
235 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
237 struct drm_encoder
*encoder
;
238 struct drm_encoder_helper_funcs
*encoder_funcs
;
239 struct drm_crtc
*crtc
;
241 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
242 encoder_funcs
= encoder
->helper_private
;
244 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
247 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
248 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
249 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
250 if (!crtc
->enabled
) {
251 crtc_funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
256 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
258 static struct drm_display_mode
*drm_has_preferred_mode(struct drm_connector
*connector
, int width
, int height
)
260 struct drm_display_mode
*mode
;
262 list_for_each_entry(mode
, &connector
->modes
, head
) {
263 if (drm_mode_width(mode
) > width
||
264 drm_mode_height(mode
) > height
)
266 if (mode
->type
& DRM_MODE_TYPE_PREFERRED
)
272 static bool drm_connector_enabled(struct drm_connector
*connector
, bool strict
)
277 enable
= connector
->status
== connector_status_connected
;
279 enable
= connector
->status
!= connector_status_disconnected
;
284 static void drm_enable_connectors(struct drm_device
*dev
, bool *enabled
)
286 bool any_enabled
= false;
287 struct drm_connector
*connector
;
290 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
291 enabled
[i
] = drm_connector_enabled(connector
, true);
292 DRM_DEBUG("connector %d enabled? %s\n", connector
->base
.id
,
293 enabled
[i
] ? "yes" : "no");
294 any_enabled
|= enabled
[i
];
302 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
303 enabled
[i
] = drm_connector_enabled(connector
, false);
308 static bool drm_target_preferred(struct drm_device
*dev
,
309 struct drm_display_mode
**modes
,
310 bool *enabled
, int width
, int height
)
312 struct drm_connector
*connector
;
315 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
317 if (enabled
[i
] == false) {
322 DRM_DEBUG("looking for preferred mode on connector %d\n",
325 modes
[i
] = drm_has_preferred_mode(connector
, width
, height
);
326 /* No preferred modes, pick one off the list */
327 if (!modes
[i
] && !list_empty(&connector
->modes
)) {
328 list_for_each_entry(modes
[i
], &connector
->modes
, head
)
331 DRM_DEBUG("found mode %s\n", modes
[i
] ? modes
[i
]->name
:
338 static int drm_pick_crtcs(struct drm_device
*dev
,
339 struct drm_crtc
**best_crtcs
,
340 struct drm_display_mode
**modes
,
341 int n
, int width
, int height
)
344 struct drm_connector
*connector
;
345 struct drm_connector_helper_funcs
*connector_funcs
;
346 struct drm_encoder
*encoder
;
347 struct drm_crtc
*best_crtc
;
348 int my_score
, best_score
, score
;
349 struct drm_crtc
**crtcs
, *crtc
;
351 if (n
== dev
->mode_config
.num_connector
)
354 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
360 best_crtcs
[n
] = NULL
;
362 best_score
= drm_pick_crtcs(dev
, best_crtcs
, modes
, n
+1, width
, height
);
363 if (modes
[n
] == NULL
)
366 crtcs
= kmalloc(dev
->mode_config
.num_connector
*
367 sizeof(struct drm_crtc
*), GFP_KERNEL
);
372 if (connector
->status
== connector_status_connected
)
374 if (drm_has_preferred_mode(connector
, width
, height
))
377 connector_funcs
= connector
->helper_private
;
378 encoder
= connector_funcs
->best_encoder(connector
);
382 connector
->encoder
= encoder
;
384 /* select a crtc for this connector and then attempt to configure
385 remaining connectors */
387 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
389 if ((connector
->encoder
->possible_crtcs
& (1 << c
)) == 0) {
394 for (o
= 0; o
< n
; o
++)
395 if (best_crtcs
[o
] == crtc
)
399 /* ignore cloning for now */
405 memcpy(crtcs
, best_crtcs
, n
* sizeof(struct drm_crtc
*));
406 score
= my_score
+ drm_pick_crtcs(dev
, crtcs
, modes
, n
+ 1,
408 if (score
> best_score
) {
411 memcpy(best_crtcs
, crtcs
,
412 dev
->mode_config
.num_connector
*
413 sizeof(struct drm_crtc
*));
422 static void drm_setup_crtcs(struct drm_device
*dev
)
424 struct drm_crtc
**crtcs
;
425 struct drm_display_mode
**modes
;
426 struct drm_encoder
*encoder
;
427 struct drm_connector
*connector
;
434 width
= dev
->mode_config
.max_width
;
435 height
= dev
->mode_config
.max_height
;
437 /* clean out all the encoder/crtc combos */
438 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
439 encoder
->crtc
= NULL
;
442 crtcs
= kcalloc(dev
->mode_config
.num_connector
,
443 sizeof(struct drm_crtc
*), GFP_KERNEL
);
444 modes
= kcalloc(dev
->mode_config
.num_connector
,
445 sizeof(struct drm_display_mode
*), GFP_KERNEL
);
446 enabled
= kcalloc(dev
->mode_config
.num_connector
,
447 sizeof(bool), GFP_KERNEL
);
449 drm_enable_connectors(dev
, enabled
);
451 ret
= drm_target_preferred(dev
, modes
, enabled
, width
, height
);
453 DRM_ERROR("Unable to find initial modes\n");
455 DRM_DEBUG("picking CRTCs for %dx%d config\n", width
, height
);
457 drm_pick_crtcs(dev
, crtcs
, modes
, 0, width
, height
);
460 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
461 struct drm_display_mode
*mode
= modes
[i
];
462 struct drm_crtc
*crtc
= crtcs
[i
];
464 if (connector
->encoder
== NULL
) {
470 DRM_DEBUG("desired mode %s set on crtc %d\n",
471 mode
->name
, crtc
->base
.id
);
472 crtc
->desired_mode
= mode
;
473 connector
->encoder
->crtc
= crtc
;
475 connector
->encoder
->crtc
= 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
;
564 bool depth_changed
, bpp_changed
;
566 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
568 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
573 if (old_fb
&& crtc
->fb
) {
574 depth_changed
= (old_fb
->depth
!= crtc
->fb
->depth
);
575 bpp_changed
= (old_fb
->bits_per_pixel
!=
576 crtc
->fb
->bits_per_pixel
);
578 depth_changed
= true;
582 saved_mode
= crtc
->mode
;
586 /* Update crtc values up front so the driver can rely on them for mode
593 if (drm_mode_equal(&saved_mode
, &crtc
->mode
)) {
594 if (saved_x
!= crtc
->x
|| saved_y
!= crtc
->y
||
595 depth_changed
|| bpp_changed
) {
596 ret
= !crtc_funcs
->mode_set_base(crtc
, crtc
->x
, crtc
->y
,
602 /* Pass our mode to the connectors and the CRTC to give them a chance to
603 * adjust it according to limitations or connector properties, and also
604 * a chance to reject the mode entirely.
606 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
608 if (encoder
->crtc
!= crtc
)
610 encoder_funcs
= encoder
->helper_private
;
611 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
617 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
621 /* Prepare the encoders and CRTCs before setting the mode. */
622 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
624 if (encoder
->crtc
!= crtc
)
626 encoder_funcs
= encoder
->helper_private
;
627 /* Disable the encoders as the first thing we do. */
628 encoder_funcs
->prepare(encoder
);
631 drm_crtc_prepare_encoders(dev
);
633 crtc_funcs
->prepare(crtc
);
635 /* Set up the DPLL and any encoders state that needs to adjust or depend
638 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
642 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
644 if (encoder
->crtc
!= crtc
)
647 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder
),
648 mode
->name
, mode
->base
.id
);
649 encoder_funcs
= encoder
->helper_private
;
650 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
653 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
654 crtc_funcs
->commit(crtc
);
656 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
658 if (encoder
->crtc
!= crtc
)
661 encoder_funcs
= encoder
->helper_private
;
662 encoder_funcs
->commit(encoder
);
666 /* XXX free adjustedmode */
667 drm_mode_destroy(dev
, adjusted_mode
);
668 /* FIXME: add subpixel order */
671 crtc
->mode
= saved_mode
;
678 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
682 * drm_crtc_helper_set_config - set a new config from userspace
683 * @crtc: CRTC to setup
684 * @crtc_info: user provided configuration
685 * @new_mode: new mode to set
686 * @connector_set: set of connectors for the new config
687 * @fb: new framebuffer
690 * Caller must hold mode config lock.
692 * Setup a new configuration, provided by the user in @crtc_info, and enable
698 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
700 struct drm_device
*dev
;
701 struct drm_crtc
**save_crtcs
, *new_crtc
;
702 struct drm_encoder
**save_encoders
, *new_encoder
;
703 struct drm_framebuffer
*old_fb
= NULL
;
705 bool mode_changed
= false;
706 bool fb_changed
= false;
707 struct drm_connector
*connector
;
708 int count
= 0, ro
, fail
= 0;
709 struct drm_crtc_helper_funcs
*crtc_funcs
;
720 if (!set
->crtc
->helper_private
)
723 crtc_funcs
= set
->crtc
->helper_private
;
725 DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n",
726 set
->crtc
, set
->crtc
->base
.id
, set
->fb
, set
->connectors
,
727 (int)set
->num_connectors
, set
->x
, set
->y
);
729 dev
= set
->crtc
->dev
;
731 /* save previous config */
732 save_enabled
= set
->crtc
->enabled
;
735 * We do mode_config.num_connectors here since we'll look at the
736 * CRTC and encoder associated with each connector later.
738 save_crtcs
= kzalloc(dev
->mode_config
.num_connector
*
739 sizeof(struct drm_crtc
*), GFP_KERNEL
);
743 save_encoders
= kzalloc(dev
->mode_config
.num_connector
*
744 sizeof(struct drm_encoders
*), GFP_KERNEL
);
745 if (!save_encoders
) {
750 /* We should be able to check here if the fb has the same properties
751 * and then just flip_or_move it */
752 if (set
->crtc
->fb
!= set
->fb
) {
753 /* If we have no fb then treat it as a full mode set */
754 if (set
->crtc
->fb
== NULL
) {
755 DRM_DEBUG("crtc has no fb, full mode set\n");
757 } else if ((set
->fb
->bits_per_pixel
!=
758 set
->crtc
->fb
->bits_per_pixel
) ||
759 set
->fb
->depth
!= set
->crtc
->fb
->depth
)
765 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
768 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
769 DRM_DEBUG("modes are different, full mode set\n");
770 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
771 drm_mode_debug_printmodeline(set
->mode
);
775 /* a) traverse passed in connector list and get encoders for them */
777 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
778 struct drm_connector_helper_funcs
*connector_funcs
=
779 connector
->helper_private
;
780 save_encoders
[count
++] = connector
->encoder
;
781 new_encoder
= connector
->encoder
;
782 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
783 if (set
->connectors
[ro
] == connector
) {
784 new_encoder
= connector_funcs
->best_encoder(connector
);
785 /* if we can't get an encoder for a connector
786 we are setting now - then fail */
787 if (new_encoder
== NULL
)
788 /* don't break so fail path works correct */
794 if (new_encoder
!= connector
->encoder
) {
795 DRM_DEBUG("encoder changed, full mode switch\n");
797 connector
->encoder
= new_encoder
;
803 goto fail_no_encoder
;
807 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
808 if (!connector
->encoder
)
811 save_crtcs
[count
++] = connector
->encoder
->crtc
;
813 if (connector
->encoder
->crtc
== set
->crtc
)
816 new_crtc
= connector
->encoder
->crtc
;
818 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
819 if (set
->connectors
[ro
] == connector
)
820 new_crtc
= set
->crtc
;
823 /* Make sure the new CRTC will work with the encoder */
825 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
829 if (new_crtc
!= connector
->encoder
->crtc
) {
830 DRM_DEBUG("crtc changed, full mode switch\n");
832 connector
->encoder
->crtc
= new_crtc
;
834 DRM_DEBUG("setting connector %d crtc to %p\n",
835 connector
->base
.id
, new_crtc
);
838 /* mode_set_base is not a required function */
839 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
843 old_fb
= set
->crtc
->fb
;
844 set
->crtc
->fb
= set
->fb
;
845 set
->crtc
->enabled
= (set
->mode
!= NULL
);
846 if (set
->mode
!= NULL
) {
847 DRM_DEBUG("attempting to set mode from userspace\n");
848 drm_mode_debug_printmodeline(set
->mode
);
849 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
852 DRM_ERROR("failed to set mode on crtc %p\n",
857 /* TODO are these needed? */
858 set
->crtc
->desired_x
= set
->x
;
859 set
->crtc
->desired_y
= set
->y
;
860 set
->crtc
->desired_mode
= set
->mode
;
862 drm_helper_disable_unused_functions(dev
);
863 } else if (fb_changed
) {
864 old_fb
= set
->crtc
->fb
;
865 if (set
->crtc
->fb
!= set
->fb
)
866 set
->crtc
->fb
= set
->fb
;
867 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
868 set
->x
, set
->y
, old_fb
);
873 kfree(save_encoders
);
878 set
->crtc
->enabled
= save_enabled
;
879 set
->crtc
->fb
= old_fb
;
881 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
882 if (!connector
->encoder
)
885 connector
->encoder
->crtc
= save_crtcs
[count
++];
890 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
891 connector
->encoder
= save_encoders
[count
++];
893 kfree(save_encoders
);
896 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
898 bool drm_helper_plugged_event(struct drm_device
*dev
)
902 drm_helper_probe_connector_modes(dev
, dev
->mode_config
.max_width
,
903 dev
->mode_config
.max_height
);
905 drm_setup_crtcs(dev
);
907 /* alert the driver fb layer */
908 dev
->mode_config
.funcs
->fb_changed(dev
);
910 /* FIXME: send hotplug event */
914 * drm_initial_config - setup a sane initial connector configuration
918 * Called at init time, must take mode config lock.
920 * Scan the CRTCs and connectors and try to put together an initial setup.
921 * At the moment, this is a cloned configuration across all heads with
922 * a new framebuffer object as the backing store.
925 * Zero if everything went ok, nonzero otherwise.
927 bool drm_helper_initial_config(struct drm_device
*dev
)
929 struct drm_connector
*connector
;
932 count
= drm_helper_probe_connector_modes(dev
,
933 dev
->mode_config
.max_width
,
934 dev
->mode_config
.max_height
);
937 * None of the available connectors had any modes, so add some
938 * and try to light them up anyway
941 DRM_ERROR("connectors have no modes, using standard modes\n");
942 list_for_each_entry(connector
,
943 &dev
->mode_config
.connector_list
,
945 drm_helper_add_std_modes(dev
, connector
);
948 drm_setup_crtcs(dev
);
950 /* alert the driver fb layer */
951 dev
->mode_config
.funcs
->fb_changed(dev
);
955 EXPORT_SYMBOL(drm_helper_initial_config
);
958 * drm_hotplug_stage_two
960 * @connector hotpluged connector
963 * Caller must hold mode config lock, function might grab struct lock.
965 * Stage two of a hotplug.
968 * Zero on success, errno on failure.
970 int drm_helper_hotplug_stage_two(struct drm_device
*dev
)
972 drm_helper_plugged_event(dev
);
976 EXPORT_SYMBOL(drm_helper_hotplug_stage_two
);
978 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
979 struct drm_mode_fb_cmd
*mode_cmd
)
981 fb
->width
= mode_cmd
->width
;
982 fb
->height
= mode_cmd
->height
;
983 fb
->pitch
= mode_cmd
->pitch
;
984 fb
->bits_per_pixel
= mode_cmd
->bpp
;
985 fb
->depth
= mode_cmd
->depth
;
989 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
991 int drm_helper_resume_force_mode(struct drm_device
*dev
)
993 struct drm_crtc
*crtc
;
996 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1001 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
1002 crtc
->x
, crtc
->y
, crtc
->fb
);
1005 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
1009 EXPORT_SYMBOL(drm_helper_resume_force_mode
);