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>
42 MODULE_AUTHOR("David Airlie, Jesse Barnes");
43 MODULE_DESCRIPTION("DRM KMS helper");
44 MODULE_LICENSE("GPL and additional rights");
47 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the
49 * @dev: drm device to operate on
51 * Some userspace presumes that the first connected connector is the main
52 * display, where it's supposed to display e.g. the login screen. For
53 * laptops, this should be the main panel. Use this function to sort all
54 * (eDP/LVDS) panels to the front of the connector list, instead of
55 * painstakingly trying to initialize them in the right order.
57 void drm_helper_move_panel_connectors_to_head(struct drm_device
*dev
)
59 struct drm_connector
*connector
, *tmp
;
60 struct list_head panel_list
;
62 INIT_LIST_HEAD(&panel_list
);
64 list_for_each_entry_safe(connector
, tmp
,
65 &dev
->mode_config
.connector_list
, head
) {
66 if (connector
->connector_type
== DRM_MODE_CONNECTOR_LVDS
||
67 connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
)
68 list_move_tail(&connector
->head
, &panel_list
);
71 list_splice(&panel_list
, &dev
->mode_config
.connector_list
);
73 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head
);
75 static bool drm_kms_helper_poll
= true;
76 module_param_named(poll
, drm_kms_helper_poll
, bool, 0600);
78 static void drm_mode_validate_flag(struct drm_connector
*connector
,
81 struct drm_display_mode
*mode
;
83 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
|
84 DRM_MODE_FLAG_3D_MASK
))
87 list_for_each_entry(mode
, &connector
->modes
, head
) {
88 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
89 !(flags
& DRM_MODE_FLAG_INTERLACE
))
90 mode
->status
= MODE_NO_INTERLACE
;
91 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
92 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
93 mode
->status
= MODE_NO_DBLESCAN
;
94 if ((mode
->flags
& DRM_MODE_FLAG_3D_MASK
) &&
95 !(flags
& DRM_MODE_FLAG_3D_MASK
))
96 mode
->status
= MODE_NO_STEREO
;
103 * drm_helper_probe_single_connector_modes - get complete set of display modes
104 * @connector: connector to probe
105 * @maxX: max width for modes
106 * @maxY: max height for modes
109 * Caller must hold mode config lock.
111 * Based on the helper callbacks implemented by @connector try to detect all
112 * valid modes. Modes will first be added to the connector's probed_modes list,
113 * then culled (based on validity and the @maxX, @maxY parameters) and put into
114 * the normal modes list.
116 * Intended to be use as a generic implementation of the ->fill_modes()
117 * @connector vfunc for drivers that use the crtc helpers for output mode
118 * filtering and detection.
121 * Number of modes found on @connector.
123 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
124 uint32_t maxX
, uint32_t maxY
)
126 struct drm_device
*dev
= connector
->dev
;
127 struct drm_display_mode
*mode
;
128 struct drm_connector_helper_funcs
*connector_funcs
=
129 connector
->helper_private
;
132 bool verbose_prune
= true;
134 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
135 drm_get_connector_name(connector
));
136 /* set all modes to the unverified state */
137 list_for_each_entry(mode
, &connector
->modes
, head
)
138 mode
->status
= MODE_UNVERIFIED
;
140 if (connector
->force
) {
141 if (connector
->force
== DRM_FORCE_ON
)
142 connector
->status
= connector_status_connected
;
144 connector
->status
= connector_status_disconnected
;
145 if (connector
->funcs
->force
)
146 connector
->funcs
->force(connector
);
148 connector
->status
= connector
->funcs
->detect(connector
, true);
151 /* Re-enable polling in case the global poll config changed. */
152 if (drm_kms_helper_poll
!= dev
->mode_config
.poll_running
)
153 drm_kms_helper_poll_enable(dev
);
155 dev
->mode_config
.poll_running
= drm_kms_helper_poll
;
157 if (connector
->status
== connector_status_disconnected
) {
158 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
159 connector
->base
.id
, drm_get_connector_name(connector
));
160 drm_mode_connector_update_edid_property(connector
, NULL
);
161 verbose_prune
= false;
165 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
166 count
= drm_load_edid_firmware(connector
);
169 count
= (*connector_funcs
->get_modes
)(connector
);
171 if (count
== 0 && connector
->status
== connector_status_connected
)
172 count
= drm_add_modes_noedid(connector
, 1024, 768);
176 drm_mode_connector_list_update(connector
);
179 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
182 if (connector
->interlace_allowed
)
183 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
184 if (connector
->doublescan_allowed
)
185 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
186 if (connector
->stereo_allowed
)
187 mode_flags
|= DRM_MODE_FLAG_3D_MASK
;
188 drm_mode_validate_flag(connector
, mode_flags
);
190 list_for_each_entry(mode
, &connector
->modes
, head
) {
191 if (mode
->status
== MODE_OK
)
192 mode
->status
= connector_funcs
->mode_valid(connector
,
197 drm_mode_prune_invalid(dev
, &connector
->modes
, verbose_prune
);
199 if (list_empty(&connector
->modes
))
202 list_for_each_entry(mode
, &connector
->modes
, head
)
203 mode
->vrefresh
= drm_mode_vrefresh(mode
);
205 drm_mode_sort(&connector
->modes
);
207 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
208 drm_get_connector_name(connector
));
209 list_for_each_entry(mode
, &connector
->modes
, head
) {
210 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
211 drm_mode_debug_printmodeline(mode
);
216 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
219 * drm_helper_encoder_in_use - check if a given encoder is in use
220 * @encoder: encoder to check
223 * Caller must hold mode config lock.
225 * Walk @encoders's DRM device's mode_config and see if it's in use.
228 * True if @encoder is part of the mode_config, false otherwise.
230 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
232 struct drm_connector
*connector
;
233 struct drm_device
*dev
= encoder
->dev
;
234 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
235 if (connector
->encoder
== encoder
)
239 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
242 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
243 * @crtc: CRTC to check
246 * Caller must hold mode config lock.
248 * Walk @crtc's DRM device's mode_config and see if it's in use.
251 * True if @crtc is part of the mode_config, false otherwise.
253 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
255 struct drm_encoder
*encoder
;
256 struct drm_device
*dev
= crtc
->dev
;
257 /* FIXME: Locking around list access? */
258 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
259 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
263 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
266 drm_encoder_disable(struct drm_encoder
*encoder
)
268 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
271 encoder
->bridge
->funcs
->disable(encoder
->bridge
);
273 if (encoder_funcs
->disable
)
274 (*encoder_funcs
->disable
)(encoder
);
276 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
279 encoder
->bridge
->funcs
->post_disable(encoder
->bridge
);
283 * drm_helper_disable_unused_functions - disable unused objects
287 * Caller must hold mode config lock.
289 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
290 * by calling its dpms function, which should power it off.
292 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
294 struct drm_encoder
*encoder
;
295 struct drm_connector
*connector
;
296 struct drm_crtc
*crtc
;
298 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
299 if (!connector
->encoder
)
301 if (connector
->status
== connector_status_disconnected
)
302 connector
->encoder
= NULL
;
305 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
306 if (!drm_helper_encoder_in_use(encoder
)) {
307 drm_encoder_disable(encoder
);
308 /* disconnector encoder from any connector */
309 encoder
->crtc
= NULL
;
313 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
314 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
315 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
316 if (!crtc
->enabled
) {
317 if (crtc_funcs
->disable
)
318 (*crtc_funcs
->disable
)(crtc
);
320 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
325 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
328 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
329 * @encoder: encoder to test
330 * @crtc: crtc to test
332 * Return false if @encoder can't be driven by @crtc, true otherwise.
334 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
335 struct drm_crtc
*crtc
)
337 struct drm_device
*dev
;
338 struct drm_crtc
*tmp
;
341 WARN(!crtc
, "checking null crtc?\n");
345 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
351 if (encoder
->possible_crtcs
& crtc_mask
)
357 * Check the CRTC we're going to map each output to vs. its current
358 * CRTC. If they don't match, we have to disable the output and the CRTC
359 * since the driver will have to re-route things.
362 drm_crtc_prepare_encoders(struct drm_device
*dev
)
364 struct drm_encoder_helper_funcs
*encoder_funcs
;
365 struct drm_encoder
*encoder
;
367 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
368 encoder_funcs
= encoder
->helper_private
;
369 /* Disable unused encoders */
370 if (encoder
->crtc
== NULL
)
371 drm_encoder_disable(encoder
);
372 /* Disable encoders whose CRTC is about to change */
373 if (encoder_funcs
->get_crtc
&&
374 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
375 drm_encoder_disable(encoder
);
380 * drm_crtc_helper_set_mode - internal helper to set a mode
381 * @crtc: CRTC to program
383 * @x: horizontal offset into the surface
384 * @y: vertical offset into the surface
385 * @old_fb: old framebuffer, for cleanup
388 * Caller must hold mode config lock.
390 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
391 * to fixup or reject the mode prior to trying to set it. This is an internal
392 * helper that drivers could e.g. use to update properties that require the
393 * entire output pipe to be disabled and re-enabled in a new configuration. For
394 * example for changing whether audio is enabled on a hdmi link or for changing
395 * panel fitter or dither attributes. It is also called by the
396 * drm_crtc_helper_set_config() helper function to drive the mode setting
400 * True if the mode was set successfully, or false otherwise.
402 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
403 struct drm_display_mode
*mode
,
405 struct drm_framebuffer
*old_fb
)
407 struct drm_device
*dev
= crtc
->dev
;
408 struct drm_display_mode
*adjusted_mode
, saved_mode
;
409 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
410 struct drm_encoder_helper_funcs
*encoder_funcs
;
411 int saved_x
, saved_y
;
413 struct drm_encoder
*encoder
;
416 saved_enabled
= crtc
->enabled
;
417 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
421 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
422 if (!adjusted_mode
) {
423 crtc
->enabled
= saved_enabled
;
427 saved_mode
= crtc
->mode
;
431 /* Update crtc values up front so the driver can rely on them for mode
438 /* Pass our mode to the connectors and the CRTC to give them a chance to
439 * adjust it according to limitations or connector properties, and also
440 * a chance to reject the mode entirely.
442 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
444 if (encoder
->crtc
!= crtc
)
447 if (encoder
->bridge
&& encoder
->bridge
->funcs
->mode_fixup
) {
448 ret
= encoder
->bridge
->funcs
->mode_fixup(
449 encoder
->bridge
, mode
, adjusted_mode
);
451 DRM_DEBUG_KMS("Bridge fixup failed\n");
456 encoder_funcs
= encoder
->helper_private
;
457 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
459 DRM_DEBUG_KMS("Encoder fixup failed\n");
464 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
465 DRM_DEBUG_KMS("CRTC fixup failed\n");
468 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
470 /* Prepare the encoders and CRTCs before setting the mode. */
471 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
473 if (encoder
->crtc
!= crtc
)
477 encoder
->bridge
->funcs
->disable(encoder
->bridge
);
479 encoder_funcs
= encoder
->helper_private
;
480 /* Disable the encoders as the first thing we do. */
481 encoder_funcs
->prepare(encoder
);
484 encoder
->bridge
->funcs
->post_disable(encoder
->bridge
);
487 drm_crtc_prepare_encoders(dev
);
489 crtc_funcs
->prepare(crtc
);
491 /* Set up the DPLL and any encoders state that needs to adjust or depend
494 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
498 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
500 if (encoder
->crtc
!= crtc
)
503 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
504 encoder
->base
.id
, drm_get_encoder_name(encoder
),
505 mode
->base
.id
, mode
->name
);
506 encoder_funcs
= encoder
->helper_private
;
507 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
509 if (encoder
->bridge
&& encoder
->bridge
->funcs
->mode_set
)
510 encoder
->bridge
->funcs
->mode_set(encoder
->bridge
, mode
,
514 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
515 crtc_funcs
->commit(crtc
);
517 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
519 if (encoder
->crtc
!= crtc
)
523 encoder
->bridge
->funcs
->pre_enable(encoder
->bridge
);
525 encoder_funcs
= encoder
->helper_private
;
526 encoder_funcs
->commit(encoder
);
529 encoder
->bridge
->funcs
->enable(encoder
->bridge
);
532 /* Store real post-adjustment hardware mode. */
533 crtc
->hwmode
= *adjusted_mode
;
535 /* Calculate and store various constants which
536 * are later needed by vblank and swap-completion
537 * timestamping. They are derived from true hwmode.
539 drm_calc_timestamping_constants(crtc
);
541 /* FIXME: add subpixel order */
543 drm_mode_destroy(dev
, adjusted_mode
);
545 crtc
->enabled
= saved_enabled
;
546 crtc
->mode
= saved_mode
;
553 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
557 drm_crtc_helper_disable(struct drm_crtc
*crtc
)
559 struct drm_device
*dev
= crtc
->dev
;
560 struct drm_connector
*connector
;
561 struct drm_encoder
*encoder
;
563 /* Decouple all encoders and their attached connectors from this crtc */
564 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
565 if (encoder
->crtc
!= crtc
)
568 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
569 if (connector
->encoder
!= encoder
)
572 connector
->encoder
= NULL
;
575 * drm_helper_disable_unused_functions() ought to be
576 * doing this, but since we've decoupled the encoder
577 * from the connector above, the required connection
578 * between them is henceforth no longer available.
580 connector
->dpms
= DRM_MODE_DPMS_OFF
;
584 drm_helper_disable_unused_functions(dev
);
589 * drm_crtc_helper_set_config - set a new config from userspace
590 * @set: mode set configuration
593 * Caller must hold mode config lock.
595 * Setup a new configuration, provided by the upper layers (either an ioctl call
596 * from userspace or internally e.g. from the fbdev support code) in @set, and
597 * enable it. This is the main helper functions for drivers that implement
598 * kernel mode setting with the crtc helper functions and the assorted
599 * ->prepare(), ->modeset() and ->commit() helper callbacks.
602 * Returns 0 on success, -ERRNO on failure.
604 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
606 struct drm_device
*dev
;
607 struct drm_crtc
*new_crtc
;
608 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
609 bool mode_changed
= false; /* if true do a full mode set */
610 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
611 struct drm_connector
*save_connectors
, *connector
;
612 int count
= 0, ro
, fail
= 0;
613 struct drm_crtc_helper_funcs
*crtc_funcs
;
614 struct drm_mode_set save_set
;
622 BUG_ON(!set
->crtc
->helper_private
);
624 /* Enforce sane interface api - has been abused by the fb helper. */
625 BUG_ON(!set
->mode
&& set
->fb
);
626 BUG_ON(set
->fb
&& set
->num_connectors
== 0);
628 crtc_funcs
= set
->crtc
->helper_private
;
634 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
635 set
->crtc
->base
.id
, set
->fb
->base
.id
,
636 (int)set
->num_connectors
, set
->x
, set
->y
);
638 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
639 return drm_crtc_helper_disable(set
->crtc
);
642 dev
= set
->crtc
->dev
;
645 * Allocate space for the backup of all (non-pointer) encoder and
648 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
649 sizeof(struct drm_encoder
), GFP_KERNEL
);
653 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
654 sizeof(struct drm_connector
), GFP_KERNEL
);
655 if (!save_connectors
) {
656 kfree(save_encoders
);
661 * Copy data. Note that driver private data is not affected.
662 * Should anything bad happen only the expected state is
663 * restored, not the drivers personal bookkeeping.
666 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
667 save_encoders
[count
++] = *encoder
;
671 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
672 save_connectors
[count
++] = *connector
;
675 save_set
.crtc
= set
->crtc
;
676 save_set
.mode
= &set
->crtc
->mode
;
677 save_set
.x
= set
->crtc
->x
;
678 save_set
.y
= set
->crtc
->y
;
679 save_set
.fb
= set
->crtc
->fb
;
681 /* We should be able to check here if the fb has the same properties
682 * and then just flip_or_move it */
683 if (set
->crtc
->fb
!= set
->fb
) {
684 /* If we have no fb then treat it as a full mode set */
685 if (set
->crtc
->fb
== NULL
) {
686 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
688 } else if (set
->fb
== NULL
) {
690 } else if (set
->fb
->pixel_format
!=
691 set
->crtc
->fb
->pixel_format
) {
697 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
700 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
701 DRM_DEBUG_KMS("modes are different, full mode set\n");
702 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
703 drm_mode_debug_printmodeline(set
->mode
);
707 /* a) traverse passed in connector list and get encoders for them */
709 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
710 struct drm_connector_helper_funcs
*connector_funcs
=
711 connector
->helper_private
;
712 new_encoder
= connector
->encoder
;
713 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
714 if (set
->connectors
[ro
] == connector
) {
715 new_encoder
= connector_funcs
->best_encoder(connector
);
716 /* if we can't get an encoder for a connector
717 we are setting now - then fail */
718 if (new_encoder
== NULL
)
719 /* don't break so fail path works correct */
723 if (connector
->dpms
!= DRM_MODE_DPMS_ON
) {
724 DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
730 if (new_encoder
!= connector
->encoder
) {
731 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
733 /* If the encoder is reused for another connector, then
734 * the appropriate crtc will be set later.
736 if (connector
->encoder
)
737 connector
->encoder
->crtc
= NULL
;
738 connector
->encoder
= new_encoder
;
748 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
749 if (!connector
->encoder
)
752 if (connector
->encoder
->crtc
== set
->crtc
)
755 new_crtc
= connector
->encoder
->crtc
;
757 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
758 if (set
->connectors
[ro
] == connector
)
759 new_crtc
= set
->crtc
;
762 /* Make sure the new CRTC will work with the encoder */
764 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
768 if (new_crtc
!= connector
->encoder
->crtc
) {
769 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
771 connector
->encoder
->crtc
= new_crtc
;
774 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
775 connector
->base
.id
, drm_get_connector_name(connector
),
778 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
779 connector
->base
.id
, drm_get_connector_name(connector
));
783 /* mode_set_base is not a required function */
784 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
788 if (drm_helper_crtc_in_use(set
->crtc
)) {
789 DRM_DEBUG_KMS("attempting to set mode from"
791 drm_mode_debug_printmodeline(set
->mode
);
792 set
->crtc
->fb
= set
->fb
;
793 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
796 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
798 set
->crtc
->fb
= save_set
.fb
;
802 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
803 for (i
= 0; i
< set
->num_connectors
; i
++) {
804 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
805 drm_get_connector_name(set
->connectors
[i
]));
806 set
->connectors
[i
]->funcs
->dpms(set
->connectors
[i
], DRM_MODE_DPMS_ON
);
809 drm_helper_disable_unused_functions(dev
);
810 } else if (fb_changed
) {
811 set
->crtc
->x
= set
->x
;
812 set
->crtc
->y
= set
->y
;
813 set
->crtc
->fb
= set
->fb
;
814 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
815 set
->x
, set
->y
, save_set
.fb
);
817 set
->crtc
->x
= save_set
.x
;
818 set
->crtc
->y
= save_set
.y
;
819 set
->crtc
->fb
= save_set
.fb
;
824 kfree(save_connectors
);
825 kfree(save_encoders
);
829 /* Restore all previous data. */
831 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
832 *encoder
= save_encoders
[count
++];
836 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
837 *connector
= save_connectors
[count
++];
840 /* Try to restore the config */
842 !drm_crtc_helper_set_mode(save_set
.crtc
, save_set
.mode
, save_set
.x
,
843 save_set
.y
, save_set
.fb
))
844 DRM_ERROR("failed to restore config after modeset failure\n");
846 kfree(save_connectors
);
847 kfree(save_encoders
);
850 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
852 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
854 int dpms
= DRM_MODE_DPMS_OFF
;
855 struct drm_connector
*connector
;
856 struct drm_device
*dev
= encoder
->dev
;
858 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
859 if (connector
->encoder
== encoder
)
860 if (connector
->dpms
< dpms
)
861 dpms
= connector
->dpms
;
865 /* Helper which handles bridge ordering around encoder dpms */
866 static void drm_helper_encoder_dpms(struct drm_encoder
*encoder
, int mode
)
868 struct drm_bridge
*bridge
= encoder
->bridge
;
869 struct drm_encoder_helper_funcs
*encoder_funcs
;
872 if (mode
== DRM_MODE_DPMS_ON
)
873 bridge
->funcs
->pre_enable(bridge
);
875 bridge
->funcs
->disable(bridge
);
878 encoder_funcs
= encoder
->helper_private
;
879 if (encoder_funcs
->dpms
)
880 encoder_funcs
->dpms(encoder
, mode
);
883 if (mode
== DRM_MODE_DPMS_ON
)
884 bridge
->funcs
->enable(bridge
);
886 bridge
->funcs
->post_disable(bridge
);
890 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
892 int dpms
= DRM_MODE_DPMS_OFF
;
893 struct drm_connector
*connector
;
894 struct drm_device
*dev
= crtc
->dev
;
896 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
897 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
898 if (connector
->dpms
< dpms
)
899 dpms
= connector
->dpms
;
904 * drm_helper_connector_dpms() - connector dpms helper implementation
905 * @connector: affected connector
908 * This is the main helper function provided by the crtc helper framework for
909 * implementing the DPMS connector attribute. It computes the new desired DPMS
910 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
911 * callback provided by the driver appropriately.
913 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
915 struct drm_encoder
*encoder
= connector
->encoder
;
916 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
917 int old_dpms
, encoder_dpms
= DRM_MODE_DPMS_OFF
;
919 if (mode
== connector
->dpms
)
922 old_dpms
= connector
->dpms
;
923 connector
->dpms
= mode
;
926 encoder_dpms
= drm_helper_choose_encoder_dpms(encoder
);
928 /* from off to on, do crtc then encoder */
929 if (mode
< old_dpms
) {
931 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
932 if (crtc_funcs
->dpms
)
933 (*crtc_funcs
->dpms
) (crtc
,
934 drm_helper_choose_crtc_dpms(crtc
));
937 drm_helper_encoder_dpms(encoder
, encoder_dpms
);
940 /* from on to off, do encoder then crtc */
941 if (mode
> old_dpms
) {
943 drm_helper_encoder_dpms(encoder
, encoder_dpms
);
945 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
946 if (crtc_funcs
->dpms
)
947 (*crtc_funcs
->dpms
) (crtc
,
948 drm_helper_choose_crtc_dpms(crtc
));
954 EXPORT_SYMBOL(drm_helper_connector_dpms
);
956 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
957 struct drm_mode_fb_cmd2
*mode_cmd
)
961 fb
->width
= mode_cmd
->width
;
962 fb
->height
= mode_cmd
->height
;
963 for (i
= 0; i
< 4; i
++) {
964 fb
->pitches
[i
] = mode_cmd
->pitches
[i
];
965 fb
->offsets
[i
] = mode_cmd
->offsets
[i
];
967 drm_fb_get_bpp_depth(mode_cmd
->pixel_format
, &fb
->depth
,
968 &fb
->bits_per_pixel
);
969 fb
->pixel_format
= mode_cmd
->pixel_format
;
973 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
975 int drm_helper_resume_force_mode(struct drm_device
*dev
)
977 struct drm_crtc
*crtc
;
978 struct drm_encoder
*encoder
;
979 struct drm_crtc_helper_funcs
*crtc_funcs
;
980 int ret
, encoder_dpms
;
982 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
987 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
988 crtc
->x
, crtc
->y
, crtc
->fb
);
991 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
993 /* Turn off outputs that were already powered off */
994 if (drm_helper_choose_crtc_dpms(crtc
)) {
995 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
997 if(encoder
->crtc
!= crtc
)
1000 encoder_dpms
= drm_helper_choose_encoder_dpms(
1003 drm_helper_encoder_dpms(encoder
, encoder_dpms
);
1006 crtc_funcs
= crtc
->helper_private
;
1007 if (crtc_funcs
->dpms
)
1008 (*crtc_funcs
->dpms
) (crtc
,
1009 drm_helper_choose_crtc_dpms(crtc
));
1012 /* disable the unused connectors while restoring the modesetting */
1013 drm_helper_disable_unused_functions(dev
);
1016 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
1018 void drm_kms_helper_hotplug_event(struct drm_device
*dev
)
1020 /* send a uevent + call fbdev */
1021 drm_sysfs_hotplug_event(dev
);
1022 if (dev
->mode_config
.funcs
->output_poll_changed
)
1023 dev
->mode_config
.funcs
->output_poll_changed(dev
);
1025 EXPORT_SYMBOL(drm_kms_helper_hotplug_event
);
1027 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
1028 static void output_poll_execute(struct work_struct
*work
)
1030 struct delayed_work
*delayed_work
= to_delayed_work(work
);
1031 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
1032 struct drm_connector
*connector
;
1033 enum drm_connector_status old_status
;
1034 bool repoll
= false, changed
= false;
1036 if (!drm_kms_helper_poll
)
1039 mutex_lock(&dev
->mode_config
.mutex
);
1040 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1042 /* Ignore forced connectors. */
1043 if (connector
->force
)
1046 /* Ignore HPD capable connectors and connectors where we don't
1047 * want any hotplug detection at all for polling. */
1048 if (!connector
->polled
|| connector
->polled
== DRM_CONNECTOR_POLL_HPD
)
1053 old_status
= connector
->status
;
1054 /* if we are connected and don't want to poll for disconnect
1056 if (old_status
== connector_status_connected
&&
1057 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
))
1060 connector
->status
= connector
->funcs
->detect(connector
, false);
1061 if (old_status
!= connector
->status
) {
1062 const char *old
, *new;
1064 old
= drm_get_connector_status_name(old_status
);
1065 new = drm_get_connector_status_name(connector
->status
);
1067 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
1068 "status updated from %s to %s\n",
1070 drm_get_connector_name(connector
),
1077 mutex_unlock(&dev
->mode_config
.mutex
);
1080 drm_kms_helper_hotplug_event(dev
);
1083 schedule_delayed_work(delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
1086 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
1088 if (!dev
->mode_config
.poll_enabled
)
1090 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
1092 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
1094 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
1097 struct drm_connector
*connector
;
1099 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
1102 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1103 if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
|
1104 DRM_CONNECTOR_POLL_DISCONNECT
))
1109 schedule_delayed_work(&dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
1111 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
1113 void drm_kms_helper_poll_init(struct drm_device
*dev
)
1115 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
1116 dev
->mode_config
.poll_enabled
= true;
1118 drm_kms_helper_poll_enable(dev
);
1120 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
1122 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
1124 drm_kms_helper_poll_disable(dev
);
1126 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
1128 bool drm_helper_hpd_irq_event(struct drm_device
*dev
)
1130 struct drm_connector
*connector
;
1131 enum drm_connector_status old_status
;
1132 bool changed
= false;
1134 if (!dev
->mode_config
.poll_enabled
)
1137 mutex_lock(&dev
->mode_config
.mutex
);
1138 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1140 /* Only handle HPD capable connectors. */
1141 if (!(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
1144 old_status
= connector
->status
;
1146 connector
->status
= connector
->funcs
->detect(connector
, false);
1147 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
1149 drm_get_connector_name(connector
),
1150 drm_get_connector_status_name(old_status
),
1151 drm_get_connector_status_name(connector
->status
));
1152 if (old_status
!= connector
->status
)
1156 mutex_unlock(&dev
->mode_config
.mutex
);
1159 drm_kms_helper_hotplug_event(dev
);
1163 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);