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>
32 #include <linux/export.h>
33 #include <linux/moduleparam.h>
36 #include <drm/drm_crtc.h>
37 #include <drm/drm_fourcc.h>
38 #include <drm/drm_crtc_helper.h>
39 #include <drm/drm_fb_helper.h>
40 #include <drm/drm_edid.h>
43 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the
45 * @dev: drm device to operate on
47 * Some userspace presumes that the first connected connector is the main
48 * display, where it's supposed to display e.g. the login screen. For
49 * laptops, this should be the main panel. Use this function to sort all
50 * (eDP/LVDS) panels to the front of the connector list, instead of
51 * painstakingly trying to initialize them in the right order.
53 void drm_helper_move_panel_connectors_to_head(struct drm_device
*dev
)
55 struct drm_connector
*connector
, *tmp
;
56 struct list_head panel_list
;
58 INIT_LIST_HEAD(&panel_list
);
60 list_for_each_entry_safe(connector
, tmp
,
61 &dev
->mode_config
.connector_list
, head
) {
62 if (connector
->connector_type
== DRM_MODE_CONNECTOR_LVDS
||
63 connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
)
64 list_move_tail(&connector
->head
, &panel_list
);
67 list_splice(&panel_list
, &dev
->mode_config
.connector_list
);
69 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head
);
71 static bool drm_kms_helper_poll
= true;
72 module_param_named(poll
, drm_kms_helper_poll
, bool, 0600);
74 static void drm_mode_validate_flag(struct drm_connector
*connector
,
77 struct drm_display_mode
*mode
;
79 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
))
82 list_for_each_entry(mode
, &connector
->modes
, head
) {
83 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
84 !(flags
& DRM_MODE_FLAG_INTERLACE
))
85 mode
->status
= MODE_NO_INTERLACE
;
86 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
87 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
88 mode
->status
= MODE_NO_DBLESCAN
;
95 * drm_helper_probe_single_connector_modes - get complete set of display modes
96 * @connector: connector to probe
97 * @maxX: max width for modes
98 * @maxY: max height for modes
101 * Caller must hold mode config lock.
103 * Based on the helper callbacks implemented by @connector try to detect all
104 * valid modes. Modes will first be added to the connector's probed_modes list,
105 * then culled (based on validity and the @maxX, @maxY parameters) and put into
106 * the normal modes list.
108 * Intended to be use as a generic implementation of the ->probe() @connector
109 * callback for drivers that use the crtc helpers for output mode filtering and
113 * Number of modes found on @connector.
115 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
116 uint32_t maxX
, uint32_t maxY
)
118 struct drm_device
*dev
= connector
->dev
;
119 struct drm_display_mode
*mode
;
120 struct drm_connector_helper_funcs
*connector_funcs
=
121 connector
->helper_private
;
124 bool verbose_prune
= true;
126 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
127 drm_get_connector_name(connector
));
128 /* set all modes to the unverified state */
129 list_for_each_entry(mode
, &connector
->modes
, head
)
130 mode
->status
= MODE_UNVERIFIED
;
132 if (connector
->force
) {
133 if (connector
->force
== DRM_FORCE_ON
)
134 connector
->status
= connector_status_connected
;
136 connector
->status
= connector_status_disconnected
;
137 if (connector
->funcs
->force
)
138 connector
->funcs
->force(connector
);
140 connector
->status
= connector
->funcs
->detect(connector
, true);
143 /* Re-enable polling in case the global poll config changed. */
144 if (drm_kms_helper_poll
!= dev
->mode_config
.poll_running
)
145 drm_kms_helper_poll_enable(dev
);
147 dev
->mode_config
.poll_running
= drm_kms_helper_poll
;
149 if (connector
->status
== connector_status_disconnected
) {
150 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
151 connector
->base
.id
, drm_get_connector_name(connector
));
152 drm_mode_connector_update_edid_property(connector
, NULL
);
153 verbose_prune
= false;
157 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
158 count
= drm_load_edid_firmware(connector
);
161 count
= (*connector_funcs
->get_modes
)(connector
);
163 if (count
== 0 && connector
->status
== connector_status_connected
)
164 count
= drm_add_modes_noedid(connector
, 1024, 768);
168 drm_mode_connector_list_update(connector
);
171 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
174 if (connector
->interlace_allowed
)
175 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
176 if (connector
->doublescan_allowed
)
177 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
178 drm_mode_validate_flag(connector
, mode_flags
);
180 list_for_each_entry(mode
, &connector
->modes
, head
) {
181 if (mode
->status
== MODE_OK
)
182 mode
->status
= connector_funcs
->mode_valid(connector
,
187 drm_mode_prune_invalid(dev
, &connector
->modes
, verbose_prune
);
189 if (list_empty(&connector
->modes
))
192 list_for_each_entry(mode
, &connector
->modes
, head
)
193 mode
->vrefresh
= drm_mode_vrefresh(mode
);
195 drm_mode_sort(&connector
->modes
);
197 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
198 drm_get_connector_name(connector
));
199 list_for_each_entry(mode
, &connector
->modes
, head
) {
200 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
201 drm_mode_debug_printmodeline(mode
);
206 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
209 * drm_helper_encoder_in_use - check if a given encoder is in use
210 * @encoder: encoder to check
213 * Caller must hold mode config lock.
215 * Walk @encoders's DRM device's mode_config and see if it's in use.
218 * True if @encoder is part of the mode_config, false otherwise.
220 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
222 struct drm_connector
*connector
;
223 struct drm_device
*dev
= encoder
->dev
;
224 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
225 if (connector
->encoder
== encoder
)
229 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
232 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
233 * @crtc: CRTC to check
236 * Caller must hold mode config lock.
238 * Walk @crtc's DRM device's mode_config and see if it's in use.
241 * True if @crtc is part of the mode_config, false otherwise.
243 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
245 struct drm_encoder
*encoder
;
246 struct drm_device
*dev
= crtc
->dev
;
247 /* FIXME: Locking around list access? */
248 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
249 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
253 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
256 drm_encoder_disable(struct drm_encoder
*encoder
)
258 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
260 if (encoder_funcs
->disable
)
261 (*encoder_funcs
->disable
)(encoder
);
263 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
267 * drm_helper_disable_unused_functions - disable unused objects
271 * Caller must hold mode config lock.
273 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
274 * by calling its dpms function, which should power it off.
276 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
278 struct drm_encoder
*encoder
;
279 struct drm_connector
*connector
;
280 struct drm_crtc
*crtc
;
282 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
283 if (!connector
->encoder
)
285 if (connector
->status
== connector_status_disconnected
)
286 connector
->encoder
= NULL
;
289 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
290 if (!drm_helper_encoder_in_use(encoder
)) {
291 drm_encoder_disable(encoder
);
292 /* disconnector encoder from any connector */
293 encoder
->crtc
= NULL
;
297 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
298 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
299 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
300 if (!crtc
->enabled
) {
301 if (crtc_funcs
->disable
)
302 (*crtc_funcs
->disable
)(crtc
);
304 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
309 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
312 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
313 * @encoder: encoder to test
314 * @crtc: crtc to test
316 * Return false if @encoder can't be driven by @crtc, true otherwise.
318 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
319 struct drm_crtc
*crtc
)
321 struct drm_device
*dev
;
322 struct drm_crtc
*tmp
;
325 WARN(!crtc
, "checking null crtc?\n");
329 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
335 if (encoder
->possible_crtcs
& crtc_mask
)
341 * Check the CRTC we're going to map each output to vs. its current
342 * CRTC. If they don't match, we have to disable the output and the CRTC
343 * since the driver will have to re-route things.
346 drm_crtc_prepare_encoders(struct drm_device
*dev
)
348 struct drm_encoder_helper_funcs
*encoder_funcs
;
349 struct drm_encoder
*encoder
;
351 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
352 encoder_funcs
= encoder
->helper_private
;
353 /* Disable unused encoders */
354 if (encoder
->crtc
== NULL
)
355 drm_encoder_disable(encoder
);
356 /* Disable encoders whose CRTC is about to change */
357 if (encoder_funcs
->get_crtc
&&
358 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
359 drm_encoder_disable(encoder
);
364 * drm_crtc_helper_set_mode - internal helper to set a mode
365 * @crtc: CRTC to program
367 * @x: horizontal offset into the surface
368 * @y: vertical offset into the surface
369 * @old_fb: old framebuffer, for cleanup
372 * Caller must hold mode config lock.
374 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
375 * to fixup or reject the mode prior to trying to set it. This is an internal
376 * helper that drivers could e.g. use to update properties that require the
377 * entire output pipe to be disabled and re-enabled in a new configuration. For
378 * example for changing whether audio is enabled on a hdmi link or for changing
379 * panel fitter or dither attributes. It is also called by the
380 * drm_crtc_helper_set_config() helper function to drive the mode setting
384 * True if the mode was set successfully, or false otherwise.
386 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
387 struct drm_display_mode
*mode
,
389 struct drm_framebuffer
*old_fb
)
391 struct drm_device
*dev
= crtc
->dev
;
392 struct drm_display_mode
*adjusted_mode
, saved_mode
, saved_hwmode
;
393 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
394 struct drm_encoder_helper_funcs
*encoder_funcs
;
395 int saved_x
, saved_y
;
396 struct drm_encoder
*encoder
;
399 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
403 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
407 saved_hwmode
= crtc
->hwmode
;
408 saved_mode
= crtc
->mode
;
412 /* Update crtc values up front so the driver can rely on them for mode
419 /* Pass our mode to the connectors and the CRTC to give them a chance to
420 * adjust it according to limitations or connector properties, and also
421 * a chance to reject the mode entirely.
423 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
425 if (encoder
->crtc
!= crtc
)
427 encoder_funcs
= encoder
->helper_private
;
428 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
430 DRM_DEBUG_KMS("Encoder fixup failed\n");
435 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
436 DRM_DEBUG_KMS("CRTC fixup failed\n");
439 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
441 /* Prepare the encoders and CRTCs before setting the mode. */
442 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
444 if (encoder
->crtc
!= crtc
)
446 encoder_funcs
= encoder
->helper_private
;
447 /* Disable the encoders as the first thing we do. */
448 encoder_funcs
->prepare(encoder
);
451 drm_crtc_prepare_encoders(dev
);
453 crtc_funcs
->prepare(crtc
);
455 /* Set up the DPLL and any encoders state that needs to adjust or depend
458 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
462 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
464 if (encoder
->crtc
!= crtc
)
467 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
468 encoder
->base
.id
, drm_get_encoder_name(encoder
),
469 mode
->base
.id
, mode
->name
);
470 encoder_funcs
= encoder
->helper_private
;
471 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
474 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
475 crtc_funcs
->commit(crtc
);
477 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
479 if (encoder
->crtc
!= crtc
)
482 encoder_funcs
= encoder
->helper_private
;
483 encoder_funcs
->commit(encoder
);
487 /* Store real post-adjustment hardware mode. */
488 crtc
->hwmode
= *adjusted_mode
;
490 /* Calculate and store various constants which
491 * are later needed by vblank and swap-completion
492 * timestamping. They are derived from true hwmode.
494 drm_calc_timestamping_constants(crtc
);
496 /* FIXME: add subpixel order */
498 drm_mode_destroy(dev
, adjusted_mode
);
500 crtc
->hwmode
= saved_hwmode
;
501 crtc
->mode
= saved_mode
;
508 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
512 drm_crtc_helper_disable(struct drm_crtc
*crtc
)
514 struct drm_device
*dev
= crtc
->dev
;
515 struct drm_connector
*connector
;
516 struct drm_encoder
*encoder
;
518 /* Decouple all encoders and their attached connectors from this crtc */
519 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
520 if (encoder
->crtc
!= crtc
)
523 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
524 if (connector
->encoder
!= encoder
)
527 connector
->encoder
= NULL
;
531 drm_helper_disable_unused_functions(dev
);
536 * drm_crtc_helper_set_config - set a new config from userspace
537 * @set: mode set configuration
540 * Caller must hold mode config lock.
542 * Setup a new configuration, provided by the upper layers (either an ioctl call
543 * from userspace or internally e.g. from the fbdev suppport code) in @set, and
544 * enable it. This is the main helper functions for drivers that implement
545 * kernel mode setting with the crtc helper functions and the assorted
546 * ->prepare(), ->modeset() and ->commit() helper callbacks.
549 * Returns 0 on success, -ERRNO on failure.
551 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
553 struct drm_device
*dev
;
554 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
555 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
556 struct drm_framebuffer
*old_fb
= NULL
;
557 bool mode_changed
= false; /* if true do a full mode set */
558 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
559 struct drm_connector
*save_connectors
, *connector
;
560 int count
= 0, ro
, fail
= 0;
561 struct drm_crtc_helper_funcs
*crtc_funcs
;
562 struct drm_mode_set save_set
;
570 BUG_ON(!set
->crtc
->helper_private
);
572 /* Enforce sane interface api - has been abused by the fb helper. */
573 BUG_ON(!set
->mode
&& set
->fb
);
574 BUG_ON(set
->fb
&& set
->num_connectors
== 0);
576 crtc_funcs
= set
->crtc
->helper_private
;
582 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
583 set
->crtc
->base
.id
, set
->fb
->base
.id
,
584 (int)set
->num_connectors
, set
->x
, set
->y
);
586 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
587 return drm_crtc_helper_disable(set
->crtc
);
590 dev
= set
->crtc
->dev
;
592 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
594 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
595 sizeof(struct drm_crtc
), GFP_KERNEL
);
599 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
600 sizeof(struct drm_encoder
), GFP_KERNEL
);
601 if (!save_encoders
) {
606 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
607 sizeof(struct drm_connector
), GFP_KERNEL
);
608 if (!save_connectors
) {
610 kfree(save_encoders
);
614 /* Copy data. Note that driver private data is not affected.
615 * Should anything bad happen only the expected state is
616 * restored, not the drivers personal bookkeeping.
619 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
620 save_crtcs
[count
++] = *crtc
;
624 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
625 save_encoders
[count
++] = *encoder
;
629 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
630 save_connectors
[count
++] = *connector
;
633 save_set
.crtc
= set
->crtc
;
634 save_set
.mode
= &set
->crtc
->mode
;
635 save_set
.x
= set
->crtc
->x
;
636 save_set
.y
= set
->crtc
->y
;
637 save_set
.fb
= set
->crtc
->fb
;
639 /* We should be able to check here if the fb has the same properties
640 * and then just flip_or_move it */
641 if (set
->crtc
->fb
!= set
->fb
) {
642 /* If we have no fb then treat it as a full mode set */
643 if (set
->crtc
->fb
== NULL
) {
644 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
646 } else if (set
->fb
== NULL
) {
648 } else if (set
->fb
->pixel_format
!=
649 set
->crtc
->fb
->pixel_format
) {
655 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
658 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
659 DRM_DEBUG_KMS("modes are different, full mode set\n");
660 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
661 drm_mode_debug_printmodeline(set
->mode
);
665 /* a) traverse passed in connector list and get encoders for them */
667 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
668 struct drm_connector_helper_funcs
*connector_funcs
=
669 connector
->helper_private
;
670 new_encoder
= connector
->encoder
;
671 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
672 if (set
->connectors
[ro
] == connector
) {
673 new_encoder
= connector_funcs
->best_encoder(connector
);
674 /* if we can't get an encoder for a connector
675 we are setting now - then fail */
676 if (new_encoder
== NULL
)
677 /* don't break so fail path works correct */
683 if (new_encoder
!= connector
->encoder
) {
684 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
686 /* If the encoder is reused for another connector, then
687 * the appropriate crtc will be set later.
689 if (connector
->encoder
)
690 connector
->encoder
->crtc
= NULL
;
691 connector
->encoder
= new_encoder
;
701 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
702 if (!connector
->encoder
)
705 if (connector
->encoder
->crtc
== set
->crtc
)
708 new_crtc
= connector
->encoder
->crtc
;
710 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
711 if (set
->connectors
[ro
] == connector
)
712 new_crtc
= set
->crtc
;
715 /* Make sure the new CRTC will work with the encoder */
717 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
721 if (new_crtc
!= connector
->encoder
->crtc
) {
722 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
724 connector
->encoder
->crtc
= new_crtc
;
727 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
728 connector
->base
.id
, drm_get_connector_name(connector
),
731 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
732 connector
->base
.id
, drm_get_connector_name(connector
));
736 /* mode_set_base is not a required function */
737 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
741 set
->crtc
->enabled
= drm_helper_crtc_in_use(set
->crtc
);
742 if (set
->crtc
->enabled
) {
743 DRM_DEBUG_KMS("attempting to set mode from"
745 drm_mode_debug_printmodeline(set
->mode
);
746 old_fb
= set
->crtc
->fb
;
747 set
->crtc
->fb
= set
->fb
;
748 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
751 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
753 set
->crtc
->fb
= old_fb
;
758 drm_helper_disable_unused_functions(dev
);
759 } else if (fb_changed
) {
760 set
->crtc
->x
= set
->x
;
761 set
->crtc
->y
= set
->y
;
763 old_fb
= set
->crtc
->fb
;
764 if (set
->crtc
->fb
!= set
->fb
)
765 set
->crtc
->fb
= set
->fb
;
766 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
767 set
->x
, set
->y
, old_fb
);
769 set
->crtc
->fb
= old_fb
;
775 * crtc set_config helpers implicit set the crtc and all connected
776 * encoders to DPMS on for a full mode set. But for just an fb update it
777 * doesn't do that. To not confuse userspace, do an explicit DPMS_ON
778 * unconditionally. This will also ensure driver internal dpms state is
781 if (set
->crtc
->enabled
) {
782 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
783 for (i
= 0; i
< set
->num_connectors
; i
++) {
784 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
785 drm_get_connector_name(set
->connectors
[i
]));
786 set
->connectors
[i
]->funcs
->dpms(set
->connectors
[i
], DRM_MODE_DPMS_ON
);
790 kfree(save_connectors
);
791 kfree(save_encoders
);
796 /* Restore all previous data. */
798 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
799 *crtc
= save_crtcs
[count
++];
803 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
804 *encoder
= save_encoders
[count
++];
808 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
809 *connector
= save_connectors
[count
++];
812 /* Try to restore the config */
814 !drm_crtc_helper_set_mode(save_set
.crtc
, save_set
.mode
, save_set
.x
,
815 save_set
.y
, save_set
.fb
))
816 DRM_ERROR("failed to restore config after modeset failure\n");
818 kfree(save_connectors
);
819 kfree(save_encoders
);
823 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
825 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
827 int dpms
= DRM_MODE_DPMS_OFF
;
828 struct drm_connector
*connector
;
829 struct drm_device
*dev
= encoder
->dev
;
831 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
832 if (connector
->encoder
== encoder
)
833 if (connector
->dpms
< dpms
)
834 dpms
= connector
->dpms
;
838 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
840 int dpms
= DRM_MODE_DPMS_OFF
;
841 struct drm_connector
*connector
;
842 struct drm_device
*dev
= crtc
->dev
;
844 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
845 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
846 if (connector
->dpms
< dpms
)
847 dpms
= connector
->dpms
;
852 * drm_helper_connector_dpms() - connector dpms helper implementation
853 * @connector: affected connector
856 * This is the main helper function provided by the crtc helper framework for
857 * implementing the DPMS connector attribute. It computes the new desired DPMS
858 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
859 * callback provided by the driver appropriately.
861 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
863 struct drm_encoder
*encoder
= connector
->encoder
;
864 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
867 if (mode
== connector
->dpms
)
870 old_dpms
= connector
->dpms
;
871 connector
->dpms
= mode
;
873 /* from off to on, do crtc then encoder */
874 if (mode
< old_dpms
) {
876 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
877 if (crtc_funcs
->dpms
)
878 (*crtc_funcs
->dpms
) (crtc
,
879 drm_helper_choose_crtc_dpms(crtc
));
882 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
883 if (encoder_funcs
->dpms
)
884 (*encoder_funcs
->dpms
) (encoder
,
885 drm_helper_choose_encoder_dpms(encoder
));
889 /* from on to off, do encoder then crtc */
890 if (mode
> old_dpms
) {
892 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
893 if (encoder_funcs
->dpms
)
894 (*encoder_funcs
->dpms
) (encoder
,
895 drm_helper_choose_encoder_dpms(encoder
));
898 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
899 if (crtc_funcs
->dpms
)
900 (*crtc_funcs
->dpms
) (crtc
,
901 drm_helper_choose_crtc_dpms(crtc
));
907 EXPORT_SYMBOL(drm_helper_connector_dpms
);
909 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
910 struct drm_mode_fb_cmd2
*mode_cmd
)
914 fb
->width
= mode_cmd
->width
;
915 fb
->height
= mode_cmd
->height
;
916 for (i
= 0; i
< 4; i
++) {
917 fb
->pitches
[i
] = mode_cmd
->pitches
[i
];
918 fb
->offsets
[i
] = mode_cmd
->offsets
[i
];
920 drm_fb_get_bpp_depth(mode_cmd
->pixel_format
, &fb
->depth
,
921 &fb
->bits_per_pixel
);
922 fb
->pixel_format
= mode_cmd
->pixel_format
;
926 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
928 int drm_helper_resume_force_mode(struct drm_device
*dev
)
930 struct drm_crtc
*crtc
;
931 struct drm_encoder
*encoder
;
932 struct drm_encoder_helper_funcs
*encoder_funcs
;
933 struct drm_crtc_helper_funcs
*crtc_funcs
;
936 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
941 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
942 crtc
->x
, crtc
->y
, crtc
->fb
);
945 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
947 /* Turn off outputs that were already powered off */
948 if (drm_helper_choose_crtc_dpms(crtc
)) {
949 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
951 if(encoder
->crtc
!= crtc
)
954 encoder_funcs
= encoder
->helper_private
;
955 if (encoder_funcs
->dpms
)
956 (*encoder_funcs
->dpms
) (encoder
,
957 drm_helper_choose_encoder_dpms(encoder
));
960 crtc_funcs
= crtc
->helper_private
;
961 if (crtc_funcs
->dpms
)
962 (*crtc_funcs
->dpms
) (crtc
,
963 drm_helper_choose_crtc_dpms(crtc
));
966 /* disable the unused connectors while restoring the modesetting */
967 drm_helper_disable_unused_functions(dev
);
970 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
972 void drm_kms_helper_hotplug_event(struct drm_device
*dev
)
974 /* send a uevent + call fbdev */
975 drm_sysfs_hotplug_event(dev
);
976 if (dev
->mode_config
.funcs
->output_poll_changed
)
977 dev
->mode_config
.funcs
->output_poll_changed(dev
);
979 EXPORT_SYMBOL(drm_kms_helper_hotplug_event
);
981 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
982 static void output_poll_execute(struct work_struct
*work
)
984 struct delayed_work
*delayed_work
= to_delayed_work(work
);
985 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
986 struct drm_connector
*connector
;
987 enum drm_connector_status old_status
;
988 bool repoll
= false, changed
= false;
990 if (!drm_kms_helper_poll
)
993 mutex_lock(&dev
->mode_config
.mutex
);
994 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
996 /* Ignore forced connectors. */
997 if (connector
->force
)
1000 /* Ignore HPD capable connectors and connectors where we don't
1001 * want any hotplug detection at all for polling. */
1002 if (!connector
->polled
|| connector
->polled
== DRM_CONNECTOR_POLL_HPD
)
1007 old_status
= connector
->status
;
1008 /* if we are connected and don't want to poll for disconnect
1010 if (old_status
== connector_status_connected
&&
1011 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
))
1014 connector
->status
= connector
->funcs
->detect(connector
, false);
1015 if (old_status
!= connector
->status
) {
1016 const char *old
, *new;
1018 old
= drm_get_connector_status_name(old_status
);
1019 new = drm_get_connector_status_name(connector
->status
);
1021 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
1022 "status updated from %s to %s\n",
1024 drm_get_connector_name(connector
),
1031 mutex_unlock(&dev
->mode_config
.mutex
);
1034 drm_kms_helper_hotplug_event(dev
);
1037 schedule_delayed_work(delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
1040 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
1042 if (!dev
->mode_config
.poll_enabled
)
1044 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
1046 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
1048 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
1051 struct drm_connector
*connector
;
1053 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
1056 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1057 if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
|
1058 DRM_CONNECTOR_POLL_DISCONNECT
))
1063 schedule_delayed_work(&dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
1065 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
1067 void drm_kms_helper_poll_init(struct drm_device
*dev
)
1069 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
1070 dev
->mode_config
.poll_enabled
= true;
1072 drm_kms_helper_poll_enable(dev
);
1074 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
1076 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
1078 drm_kms_helper_poll_disable(dev
);
1080 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
1082 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
1084 struct drm_connector
*connector
;
1085 enum drm_connector_status old_status
;
1086 bool changed
= false;
1088 if (!dev
->mode_config
.poll_enabled
)
1091 mutex_lock(&dev
->mode_config
.mutex
);
1092 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1094 /* Only handle HPD capable connectors. */
1095 if (!(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
1098 old_status
= connector
->status
;
1100 connector
->status
= connector
->funcs
->detect(connector
, false);
1101 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
1103 drm_get_connector_name(connector
),
1104 drm_get_connector_status_name(old_status
),
1105 drm_get_connector_status_name(connector
->status
));
1106 if (old_status
!= connector
->status
)
1110 mutex_unlock(&dev
->mode_config
.mutex
);
1113 drm_kms_helper_hotplug_event(dev
);
1115 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);