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1// SPDX-License-Identifier: MIT
2/*
3 * Copyright 2018 Noralf Trønnes
4 * Copyright (c) 2006-2009 Red Hat Inc.
5 * Copyright (c) 2006-2008 Intel Corporation
6 * Jesse Barnes <jesse.barnes@intel.com>
7 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
8 */
9
10#include "drm/drm_modeset_lock.h"
11#include <linux/module.h>
12#include <linux/mutex.h>
13#include <linux/slab.h>
14
15#include <drm/drm_atomic.h>
16#include <drm/drm_client.h>
17#include <drm/drm_connector.h>
18#include <drm/drm_crtc.h>
19#include <drm/drm_device.h>
20#include <drm/drm_drv.h>
21#include <drm/drm_encoder.h>
22#include <drm/drm_print.h>
23
24#include "drm_crtc_internal.h"
25#include "drm_internal.h"
26
27#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8
28
29struct drm_client_offset {
30 int x, y;
31};
32
33int drm_client_modeset_create(struct drm_client_dev *client)
34{
35 struct drm_device *dev = client->dev;
36 unsigned int num_crtc = dev->mode_config.num_crtc;
37 unsigned int max_connector_count = 1;
38 struct drm_mode_set *modeset;
39 struct drm_crtc *crtc;
40 unsigned int i = 0;
41
42 /* Add terminating zero entry to enable index less iteration */
43 client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL);
44 if (!client->modesets)
45 return -ENOMEM;
46
47 mutex_init(&client->modeset_mutex);
48
49 drm_for_each_crtc(crtc, dev)
50 client->modesets[i++].crtc = crtc;
51
52 /* Cloning is only supported in the single crtc case. */
53 if (num_crtc == 1)
54 max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS;
55
56 for (modeset = client->modesets; modeset->crtc; modeset++) {
57 modeset->connectors = kcalloc(max_connector_count,
58 sizeof(*modeset->connectors), GFP_KERNEL);
59 if (!modeset->connectors)
60 goto err_free;
61 }
62
63 return 0;
64
65err_free:
66 drm_client_modeset_free(client);
67
68 return -ENOMEM;
69}
70
71static void drm_client_modeset_release(struct drm_client_dev *client)
72{
73 struct drm_mode_set *modeset;
74 unsigned int i;
75
76 drm_client_for_each_modeset(modeset, client) {
77 drm_mode_destroy(client->dev, modeset->mode);
78 modeset->mode = NULL;
79 modeset->fb = NULL;
80
81 for (i = 0; i < modeset->num_connectors; i++) {
82 drm_connector_put(modeset->connectors[i]);
83 modeset->connectors[i] = NULL;
84 }
85 modeset->num_connectors = 0;
86 }
87}
88
89void drm_client_modeset_free(struct drm_client_dev *client)
90{
91 struct drm_mode_set *modeset;
92
93 mutex_lock(&client->modeset_mutex);
94
95 drm_client_modeset_release(client);
96
97 drm_client_for_each_modeset(modeset, client)
98 kfree(modeset->connectors);
99
100 mutex_unlock(&client->modeset_mutex);
101
102 mutex_destroy(&client->modeset_mutex);
103 kfree(client->modesets);
104}
105
106static struct drm_mode_set *
107drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
108{
109 struct drm_mode_set *modeset;
110
111 drm_client_for_each_modeset(modeset, client)
112 if (modeset->crtc == crtc)
113 return modeset;
114
115 return NULL;
116}
117
118static struct drm_display_mode *
119drm_connector_get_tiled_mode(struct drm_connector *connector)
120{
121 struct drm_display_mode *mode;
122
123 list_for_each_entry(mode, &connector->modes, head) {
124 if (mode->hdisplay == connector->tile_h_size &&
125 mode->vdisplay == connector->tile_v_size)
126 return mode;
127 }
128 return NULL;
129}
130
131static struct drm_display_mode *
132drm_connector_fallback_non_tiled_mode(struct drm_connector *connector)
133{
134 struct drm_display_mode *mode;
135
136 list_for_each_entry(mode, &connector->modes, head) {
137 if (mode->hdisplay == connector->tile_h_size &&
138 mode->vdisplay == connector->tile_v_size)
139 continue;
140 return mode;
141 }
142 return NULL;
143}
144
145static struct drm_display_mode *
146drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height)
147{
148 struct drm_display_mode *mode;
149
150 list_for_each_entry(mode, &connector->modes, head) {
151 if (mode->hdisplay > width ||
152 mode->vdisplay > height)
153 continue;
154 if (mode->type & DRM_MODE_TYPE_PREFERRED)
155 return mode;
156 }
157 return NULL;
158}
159
160static struct drm_display_mode *
161drm_connector_pick_cmdline_mode(struct drm_connector *connector)
162{
163 struct drm_cmdline_mode *cmdline_mode;
164 struct drm_display_mode *mode;
165 bool prefer_non_interlace;
166
167 cmdline_mode = &connector->cmdline_mode;
168 if (cmdline_mode->specified == false)
169 return NULL;
170
171 /* attempt to find a matching mode in the list of modes
172 * we have gotten so far, if not add a CVT mode that conforms
173 */
174 if (cmdline_mode->rb || cmdline_mode->margins)
175 goto create_mode;
176
177 prefer_non_interlace = !cmdline_mode->interlace;
178again:
179 list_for_each_entry(mode, &connector->modes, head) {
180 /* Check (optional) mode name first */
181 if (!strcmp(mode->name, cmdline_mode->name))
182 return mode;
183
184 /* check width/height */
185 if (mode->hdisplay != cmdline_mode->xres ||
186 mode->vdisplay != cmdline_mode->yres)
187 continue;
188
189 if (cmdline_mode->refresh_specified) {
190 if (drm_mode_vrefresh(mode) != cmdline_mode->refresh)
191 continue;
192 }
193
194 if (cmdline_mode->interlace) {
195 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
196 continue;
197 } else if (prefer_non_interlace) {
198 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
199 continue;
200 }
201 return mode;
202 }
203
204 if (prefer_non_interlace) {
205 prefer_non_interlace = false;
206 goto again;
207 }
208
209create_mode:
210 mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode);
211 if (mode)
212 list_add(&mode->head, &connector->modes);
213
214 return mode;
215}
216
217static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
218{
219 bool enable;
220
221 if (connector->display_info.non_desktop)
222 return false;
223
224 if (strict)
225 enable = connector->status == connector_status_connected;
226 else
227 enable = connector->status != connector_status_disconnected;
228
229 return enable;
230}
231
232static void drm_client_connectors_enabled(struct drm_connector **connectors,
233 unsigned int connector_count,
234 bool *enabled)
235{
236 bool any_enabled = false;
237 struct drm_connector *connector;
238 int i = 0;
239
240 for (i = 0; i < connector_count; i++) {
241 connector = connectors[i];
242 enabled[i] = drm_connector_enabled(connector, true);
243 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
244 connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no");
245
246 any_enabled |= enabled[i];
247 }
248
249 if (any_enabled)
250 return;
251
252 for (i = 0; i < connector_count; i++)
253 enabled[i] = drm_connector_enabled(connectors[i], false);
254}
255
256static bool drm_client_target_cloned(struct drm_device *dev,
257 struct drm_connector **connectors,
258 unsigned int connector_count,
259 struct drm_display_mode **modes,
260 struct drm_client_offset *offsets,
261 bool *enabled, int width, int height)
262{
263 int count, i, j;
264 bool can_clone = false;
265 struct drm_display_mode *dmt_mode, *mode;
266
267 /* only contemplate cloning in the single crtc case */
268 if (dev->mode_config.num_crtc > 1)
269 return false;
270
271 count = 0;
272 for (i = 0; i < connector_count; i++) {
273 if (enabled[i])
274 count++;
275 }
276
277 /* only contemplate cloning if more than one connector is enabled */
278 if (count <= 1)
279 return false;
280
281 /* check the command line or if nothing common pick 1024x768 */
282 can_clone = true;
283 for (i = 0; i < connector_count; i++) {
284 if (!enabled[i])
285 continue;
286 modes[i] = drm_connector_pick_cmdline_mode(connectors[i]);
287 if (!modes[i]) {
288 can_clone = false;
289 break;
290 }
291 for (j = 0; j < i; j++) {
292 if (!enabled[j])
293 continue;
294 if (!drm_mode_match(modes[j], modes[i],
295 DRM_MODE_MATCH_TIMINGS |
296 DRM_MODE_MATCH_CLOCK |
297 DRM_MODE_MATCH_FLAGS |
298 DRM_MODE_MATCH_3D_FLAGS))
299 can_clone = false;
300 }
301 }
302
303 if (can_clone) {
304 DRM_DEBUG_KMS("can clone using command line\n");
305 return true;
306 }
307
308 /* try and find a 1024x768 mode on each connector */
309 can_clone = true;
310 dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false);
311
312 for (i = 0; i < connector_count; i++) {
313 if (!enabled[i])
314 continue;
315
316 list_for_each_entry(mode, &connectors[i]->modes, head) {
317 if (drm_mode_match(mode, dmt_mode,
318 DRM_MODE_MATCH_TIMINGS |
319 DRM_MODE_MATCH_CLOCK |
320 DRM_MODE_MATCH_FLAGS |
321 DRM_MODE_MATCH_3D_FLAGS))
322 modes[i] = mode;
323 }
324 if (!modes[i])
325 can_clone = false;
326 }
327
328 if (can_clone) {
329 DRM_DEBUG_KMS("can clone using 1024x768\n");
330 return true;
331 }
332 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
333 return false;
334}
335
336static int drm_client_get_tile_offsets(struct drm_connector **connectors,
337 unsigned int connector_count,
338 struct drm_display_mode **modes,
339 struct drm_client_offset *offsets,
340 int idx,
341 int h_idx, int v_idx)
342{
343 struct drm_connector *connector;
344 int i;
345 int hoffset = 0, voffset = 0;
346
347 for (i = 0; i < connector_count; i++) {
348 connector = connectors[i];
349 if (!connector->has_tile)
350 continue;
351
352 if (!modes[i] && (h_idx || v_idx)) {
353 DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i,
354 connector->base.id);
355 continue;
356 }
357 if (connector->tile_h_loc < h_idx)
358 hoffset += modes[i]->hdisplay;
359
360 if (connector->tile_v_loc < v_idx)
361 voffset += modes[i]->vdisplay;
362 }
363 offsets[idx].x = hoffset;
364 offsets[idx].y = voffset;
365 DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx);
366 return 0;
367}
368
369static bool drm_client_target_preferred(struct drm_connector **connectors,
370 unsigned int connector_count,
371 struct drm_display_mode **modes,
372 struct drm_client_offset *offsets,
373 bool *enabled, int width, int height)
374{
375 const u64 mask = BIT_ULL(connector_count) - 1;
376 struct drm_connector *connector;
377 u64 conn_configured = 0;
378 int tile_pass = 0;
379 int num_tiled_conns = 0;
380 int i;
381
382 for (i = 0; i < connector_count; i++) {
383 if (connectors[i]->has_tile &&
384 connectors[i]->status == connector_status_connected)
385 num_tiled_conns++;
386 }
387
388retry:
389 for (i = 0; i < connector_count; i++) {
390 connector = connectors[i];
391
392 if (conn_configured & BIT_ULL(i))
393 continue;
394
395 if (enabled[i] == false) {
396 conn_configured |= BIT_ULL(i);
397 continue;
398 }
399
400 /* first pass over all the untiled connectors */
401 if (tile_pass == 0 && connector->has_tile)
402 continue;
403
404 if (tile_pass == 1) {
405 if (connector->tile_h_loc != 0 ||
406 connector->tile_v_loc != 0)
407 continue;
408
409 } else {
410 if (connector->tile_h_loc != tile_pass - 1 &&
411 connector->tile_v_loc != tile_pass - 1)
412 /* if this tile_pass doesn't cover any of the tiles - keep going */
413 continue;
414
415 /*
416 * find the tile offsets for this pass - need to find
417 * all tiles left and above
418 */
419 drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i,
420 connector->tile_h_loc, connector->tile_v_loc);
421 }
422 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
423 connector->base.id);
424
425 /* got for command line mode first */
426 modes[i] = drm_connector_pick_cmdline_mode(connector);
427 if (!modes[i]) {
428 DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n",
429 connector->base.id, connector->tile_group ? connector->tile_group->id : 0);
430 modes[i] = drm_connector_has_preferred_mode(connector, width, height);
431 }
432 /* No preferred modes, pick one off the list */
433 if (!modes[i] && !list_empty(&connector->modes)) {
434 list_for_each_entry(modes[i], &connector->modes, head)
435 break;
436 }
437 /*
438 * In case of tiled mode if all tiles not present fallback to
439 * first available non tiled mode.
440 * After all tiles are present, try to find the tiled mode
441 * for all and if tiled mode not present due to fbcon size
442 * limitations, use first non tiled mode only for
443 * tile 0,0 and set to no mode for all other tiles.
444 */
445 if (connector->has_tile) {
446 if (num_tiled_conns <
447 connector->num_h_tile * connector->num_v_tile ||
448 (connector->tile_h_loc == 0 &&
449 connector->tile_v_loc == 0 &&
450 !drm_connector_get_tiled_mode(connector))) {
451 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
452 connector->base.id);
453 modes[i] = drm_connector_fallback_non_tiled_mode(connector);
454 } else {
455 modes[i] = drm_connector_get_tiled_mode(connector);
456 }
457 }
458
459 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
460 "none");
461 conn_configured |= BIT_ULL(i);
462 }
463
464 if ((conn_configured & mask) != mask) {
465 tile_pass++;
466 goto retry;
467 }
468 return true;
469}
470
471static bool connector_has_possible_crtc(struct drm_connector *connector,
472 struct drm_crtc *crtc)
473{
474 struct drm_encoder *encoder;
475
476 drm_connector_for_each_possible_encoder(connector, encoder) {
477 if (encoder->possible_crtcs & drm_crtc_mask(crtc))
478 return true;
479 }
480
481 return false;
482}
483
484static int drm_client_pick_crtcs(struct drm_client_dev *client,
485 struct drm_connector **connectors,
486 unsigned int connector_count,
487 struct drm_crtc **best_crtcs,
488 struct drm_display_mode **modes,
489 int n, int width, int height)
490{
491 struct drm_device *dev = client->dev;
492 struct drm_connector *connector;
493 int my_score, best_score, score;
494 struct drm_crtc **crtcs, *crtc;
495 struct drm_mode_set *modeset;
496 int o;
497
498 if (n == connector_count)
499 return 0;
500
501 connector = connectors[n];
502
503 best_crtcs[n] = NULL;
504 best_score = drm_client_pick_crtcs(client, connectors, connector_count,
505 best_crtcs, modes, n + 1, width, height);
506 if (modes[n] == NULL)
507 return best_score;
508
509 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
510 if (!crtcs)
511 return best_score;
512
513 my_score = 1;
514 if (connector->status == connector_status_connected)
515 my_score++;
516 if (connector->cmdline_mode.specified)
517 my_score++;
518 if (drm_connector_has_preferred_mode(connector, width, height))
519 my_score++;
520
521 /*
522 * select a crtc for this connector and then attempt to configure
523 * remaining connectors
524 */
525 drm_client_for_each_modeset(modeset, client) {
526 crtc = modeset->crtc;
527
528 if (!connector_has_possible_crtc(connector, crtc))
529 continue;
530
531 for (o = 0; o < n; o++)
532 if (best_crtcs[o] == crtc)
533 break;
534
535 if (o < n) {
536 /* ignore cloning unless only a single crtc */
537 if (dev->mode_config.num_crtc > 1)
538 continue;
539
540 if (!drm_mode_equal(modes[o], modes[n]))
541 continue;
542 }
543
544 crtcs[n] = crtc;
545 memcpy(crtcs, best_crtcs, n * sizeof(*crtcs));
546 score = my_score + drm_client_pick_crtcs(client, connectors, connector_count,
547 crtcs, modes, n + 1, width, height);
548 if (score > best_score) {
549 best_score = score;
550 memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs));
551 }
552 }
553
554 kfree(crtcs);
555 return best_score;
556}
557
558/* Try to read the BIOS display configuration and use it for the initial config */
559static bool drm_client_firmware_config(struct drm_client_dev *client,
560 struct drm_connector **connectors,
561 unsigned int connector_count,
562 struct drm_crtc **crtcs,
563 struct drm_display_mode **modes,
564 struct drm_client_offset *offsets,
565 bool *enabled, int width, int height)
566{
567 const int count = min_t(unsigned int, connector_count, BITS_PER_LONG);
568 unsigned long conn_configured, conn_seq, mask;
569 struct drm_device *dev = client->dev;
570 int i, j;
571 bool *save_enabled;
572 bool fallback = true, ret = true;
573 int num_connectors_enabled = 0;
574 int num_connectors_detected = 0;
575 int num_tiled_conns = 0;
576 struct drm_modeset_acquire_ctx ctx;
577
578 if (!drm_drv_uses_atomic_modeset(dev))
579 return false;
580
581 if (WARN_ON(count <= 0))
582 return false;
583
584 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
585 if (!save_enabled)
586 return false;
587
588 drm_modeset_acquire_init(&ctx, 0);
589
590 while (drm_modeset_lock_all_ctx(dev, &ctx) != 0)
591 drm_modeset_backoff(&ctx);
592
593 memcpy(save_enabled, enabled, count);
594 mask = GENMASK(count - 1, 0);
595 conn_configured = 0;
596 for (i = 0; i < count; i++) {
597 if (connectors[i]->has_tile &&
598 connectors[i]->status == connector_status_connected)
599 num_tiled_conns++;
600 }
601retry:
602 conn_seq = conn_configured;
603 for (i = 0; i < count; i++) {
604 struct drm_connector *connector;
605 struct drm_encoder *encoder;
606 struct drm_crtc *new_crtc;
607
608 connector = connectors[i];
609
610 if (conn_configured & BIT(i))
611 continue;
612
613 if (conn_seq == 0 && !connector->has_tile)
614 continue;
615
616 if (connector->status == connector_status_connected)
617 num_connectors_detected++;
618
619 if (!enabled[i]) {
620 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
621 connector->name);
622 conn_configured |= BIT(i);
623 continue;
624 }
625
626 if (connector->force == DRM_FORCE_OFF) {
627 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
628 connector->name);
629 enabled[i] = false;
630 continue;
631 }
632
633 encoder = connector->state->best_encoder;
634 if (!encoder || WARN_ON(!connector->state->crtc)) {
635 if (connector->force > DRM_FORCE_OFF)
636 goto bail;
637
638 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
639 connector->name);
640 enabled[i] = false;
641 conn_configured |= BIT(i);
642 continue;
643 }
644
645 num_connectors_enabled++;
646
647 new_crtc = connector->state->crtc;
648
649 /*
650 * Make sure we're not trying to drive multiple connectors
651 * with a single CRTC, since our cloning support may not
652 * match the BIOS.
653 */
654 for (j = 0; j < count; j++) {
655 if (crtcs[j] == new_crtc) {
656 DRM_DEBUG_KMS("fallback: cloned configuration\n");
657 goto bail;
658 }
659 }
660
661 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
662 connector->name);
663
664 /* go for command line mode first */
665 modes[i] = drm_connector_pick_cmdline_mode(connector);
666
667 /* try for preferred next */
668 if (!modes[i]) {
669 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
670 connector->name, connector->has_tile);
671 modes[i] = drm_connector_has_preferred_mode(connector, width, height);
672 }
673
674 /* No preferred mode marked by the EDID? Are there any modes? */
675 if (!modes[i] && !list_empty(&connector->modes)) {
676 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
677 connector->name);
678 modes[i] = list_first_entry(&connector->modes,
679 struct drm_display_mode,
680 head);
681 }
682
683 /* last resort: use current mode */
684 if (!modes[i]) {
685 /*
686 * IMPORTANT: We want to use the adjusted mode (i.e.
687 * after the panel fitter upscaling) as the initial
688 * config, not the input mode, which is what crtc->mode
689 * usually contains. But since our current
690 * code puts a mode derived from the post-pfit timings
691 * into crtc->mode this works out correctly.
692 *
693 * This is crtc->mode and not crtc->state->mode for the
694 * fastboot check to work correctly.
695 */
696 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
697 connector->name);
698 modes[i] = &connector->state->crtc->mode;
699 }
700 /*
701 * In case of tiled modes, if all tiles are not present
702 * then fallback to a non tiled mode.
703 */
704 if (connector->has_tile &&
705 num_tiled_conns < connector->num_h_tile * connector->num_v_tile) {
706 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
707 connector->base.id);
708 modes[i] = drm_connector_fallback_non_tiled_mode(connector);
709 }
710 crtcs[i] = new_crtc;
711
712 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
713 connector->name,
714 connector->state->crtc->base.id,
715 connector->state->crtc->name,
716 modes[i]->hdisplay, modes[i]->vdisplay,
717 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
718
719 fallback = false;
720 conn_configured |= BIT(i);
721 }
722
723 if ((conn_configured & mask) != mask && conn_configured != conn_seq)
724 goto retry;
725
726 /*
727 * If the BIOS didn't enable everything it could, fall back to have the
728 * same user experiencing of lighting up as much as possible like the
729 * fbdev helper library.
730 */
731 if (num_connectors_enabled != num_connectors_detected &&
732 num_connectors_enabled < dev->mode_config.num_crtc) {
733 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
734 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
735 num_connectors_detected);
736 fallback = true;
737 }
738
739 if (fallback) {
740bail:
741 DRM_DEBUG_KMS("Not using firmware configuration\n");
742 memcpy(enabled, save_enabled, count);
743 ret = false;
744 }
745
746 drm_modeset_drop_locks(&ctx);
747 drm_modeset_acquire_fini(&ctx);
748
749 kfree(save_enabled);
750 return ret;
751}
752
753/**
754 * drm_client_modeset_probe() - Probe for displays
755 * @client: DRM client
756 * @width: Maximum display mode width (optional)
757 * @height: Maximum display mode height (optional)
758 *
759 * This function sets up display pipelines for enabled connectors and stores the
760 * config in the client's modeset array.
761 *
762 * Returns:
763 * Zero on success or negative error code on failure.
764 */
765int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height)
766{
767 struct drm_connector *connector, **connectors = NULL;
768 struct drm_connector_list_iter conn_iter;
769 struct drm_device *dev = client->dev;
770 unsigned int total_modes_count = 0;
771 struct drm_client_offset *offsets;
772 unsigned int connector_count = 0;
773 struct drm_display_mode **modes;
774 struct drm_crtc **crtcs;
775 int i, ret = 0;
776 bool *enabled;
777
778 DRM_DEBUG_KMS("\n");
779
780 if (!width)
781 width = dev->mode_config.max_width;
782 if (!height)
783 height = dev->mode_config.max_height;
784
785 drm_connector_list_iter_begin(dev, &conn_iter);
786 drm_client_for_each_connector_iter(connector, &conn_iter) {
787 struct drm_connector **tmp;
788
789 tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL);
790 if (!tmp) {
791 ret = -ENOMEM;
792 goto free_connectors;
793 }
794
795 connectors = tmp;
796 drm_connector_get(connector);
797 connectors[connector_count++] = connector;
798 }
799 drm_connector_list_iter_end(&conn_iter);
800
801 if (!connector_count)
802 return 0;
803
804 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
805 modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL);
806 offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL);
807 enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
808 if (!crtcs || !modes || !enabled || !offsets) {
809 DRM_ERROR("Memory allocation failed\n");
810 ret = -ENOMEM;
811 goto out;
812 }
813
814 mutex_lock(&client->modeset_mutex);
815
816 mutex_lock(&dev->mode_config.mutex);
817 for (i = 0; i < connector_count; i++)
818 total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
819 if (!total_modes_count)
820 DRM_DEBUG_KMS("No connectors reported connected with modes\n");
821 drm_client_connectors_enabled(connectors, connector_count, enabled);
822
823 if (!drm_client_firmware_config(client, connectors, connector_count, crtcs,
824 modes, offsets, enabled, width, height)) {
825 memset(modes, 0, connector_count * sizeof(*modes));
826 memset(crtcs, 0, connector_count * sizeof(*crtcs));
827 memset(offsets, 0, connector_count * sizeof(*offsets));
828
829 if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
830 offsets, enabled, width, height) &&
831 !drm_client_target_preferred(connectors, connector_count, modes,
832 offsets, enabled, width, height))
833 DRM_ERROR("Unable to find initial modes\n");
834
835 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n",
836 width, height);
837
838 drm_client_pick_crtcs(client, connectors, connector_count,
839 crtcs, modes, 0, width, height);
840 }
841 mutex_unlock(&dev->mode_config.mutex);
842
843 drm_client_modeset_release(client);
844
845 for (i = 0; i < connector_count; i++) {
846 struct drm_display_mode *mode = modes[i];
847 struct drm_crtc *crtc = crtcs[i];
848 struct drm_client_offset *offset = &offsets[i];
849
850 if (mode && crtc) {
851 struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
852 struct drm_connector *connector = connectors[i];
853
854 DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n",
855 mode->name, crtc->base.id, offset->x, offset->y);
856
857 if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
858 (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
859 ret = -EINVAL;
860 break;
861 }
862
863 modeset->mode = drm_mode_duplicate(dev, mode);
864 drm_connector_get(connector);
865 modeset->connectors[modeset->num_connectors++] = connector;
866 modeset->x = offset->x;
867 modeset->y = offset->y;
868 }
869 }
870
871 mutex_unlock(&client->modeset_mutex);
872out:
873 kfree(crtcs);
874 kfree(modes);
875 kfree(offsets);
876 kfree(enabled);
877free_connectors:
878 for (i = 0; i < connector_count; i++)
879 drm_connector_put(connectors[i]);
880 kfree(connectors);
881
882 return ret;
883}
884EXPORT_SYMBOL(drm_client_modeset_probe);
885
886/**
887 * drm_client_rotation() - Check the initial rotation value
888 * @modeset: DRM modeset
889 * @rotation: Returned rotation value
890 *
891 * This function checks if the primary plane in @modeset can hw rotate
892 * to match the rotation needed on its connector.
893 *
894 * Note: Currently only 0 and 180 degrees are supported.
895 *
896 * Return:
897 * True if the plane can do the rotation, false otherwise.
898 */
899bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation)
900{
901 struct drm_connector *connector = modeset->connectors[0];
902 struct drm_plane *plane = modeset->crtc->primary;
903 struct drm_cmdline_mode *cmdline;
904 u64 valid_mask = 0;
905 unsigned int i;
906
907 if (!modeset->num_connectors)
908 return false;
909
910 switch (connector->display_info.panel_orientation) {
911 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP:
912 *rotation = DRM_MODE_ROTATE_180;
913 break;
914 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP:
915 *rotation = DRM_MODE_ROTATE_90;
916 break;
917 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP:
918 *rotation = DRM_MODE_ROTATE_270;
919 break;
920 default:
921 *rotation = DRM_MODE_ROTATE_0;
922 }
923
924 /**
925 * The panel already defined the default rotation
926 * through its orientation. Whatever has been provided
927 * on the command line needs to be added to that.
928 *
929 * Unfortunately, the rotations are at different bit
930 * indices, so the math to add them up are not as
931 * trivial as they could.
932 *
933 * Reflections on the other hand are pretty trivial to deal with, a
934 * simple XOR between the two handle the addition nicely.
935 */
936 cmdline = &connector->cmdline_mode;
937 if (cmdline->specified && cmdline->rotation_reflection) {
938 unsigned int cmdline_rest, panel_rest;
939 unsigned int cmdline_rot, panel_rot;
940 unsigned int sum_rot, sum_rest;
941
942 panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK);
943 cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK);
944 sum_rot = (panel_rot + cmdline_rot) % 4;
945
946 panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK;
947 cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK;
948 sum_rest = panel_rest ^ cmdline_rest;
949
950 *rotation = (1 << sum_rot) | sum_rest;
951 }
952
953 /*
954 * TODO: support 90 / 270 degree hardware rotation,
955 * depending on the hardware this may require the framebuffer
956 * to be in a specific tiling format.
957 */
958 if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 &&
959 (*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) ||
960 !plane->rotation_property)
961 return false;
962
963 for (i = 0; i < plane->rotation_property->num_values; i++)
964 valid_mask |= (1ULL << plane->rotation_property->values[i]);
965
966 if (!(*rotation & valid_mask))
967 return false;
968
969 return true;
970}
971EXPORT_SYMBOL(drm_client_rotation);
972
973static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check)
974{
975 struct drm_device *dev = client->dev;
976 struct drm_plane *plane;
977 struct drm_atomic_state *state;
978 struct drm_modeset_acquire_ctx ctx;
979 struct drm_mode_set *mode_set;
980 int ret;
981
982 drm_modeset_acquire_init(&ctx, 0);
983
984 state = drm_atomic_state_alloc(dev);
985 if (!state) {
986 ret = -ENOMEM;
987 goto out_ctx;
988 }
989
990 state->acquire_ctx = &ctx;
991retry:
992 drm_for_each_plane(plane, dev) {
993 struct drm_plane_state *plane_state;
994
995 plane_state = drm_atomic_get_plane_state(state, plane);
996 if (IS_ERR(plane_state)) {
997 ret = PTR_ERR(plane_state);
998 goto out_state;
999 }
1000
1001 plane_state->rotation = DRM_MODE_ROTATE_0;
1002
1003 /* disable non-primary: */
1004 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
1005 continue;
1006
1007 ret = __drm_atomic_helper_disable_plane(plane, plane_state);
1008 if (ret != 0)
1009 goto out_state;
1010 }
1011
1012 drm_client_for_each_modeset(mode_set, client) {
1013 struct drm_plane *primary = mode_set->crtc->primary;
1014 unsigned int rotation;
1015
1016 if (drm_client_rotation(mode_set, &rotation)) {
1017 struct drm_plane_state *plane_state;
1018
1019 /* Cannot fail as we've already gotten the plane state above */
1020 plane_state = drm_atomic_get_new_plane_state(state, primary);
1021 plane_state->rotation = rotation;
1022 }
1023
1024 ret = __drm_atomic_helper_set_config(mode_set, state);
1025 if (ret != 0)
1026 goto out_state;
1027
1028 /*
1029 * __drm_atomic_helper_set_config() sets active when a
1030 * mode is set, unconditionally clear it if we force DPMS off
1031 */
1032 if (!active) {
1033 struct drm_crtc *crtc = mode_set->crtc;
1034 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
1035
1036 crtc_state->active = false;
1037 }
1038 }
1039
1040 if (check)
1041 ret = drm_atomic_check_only(state);
1042 else
1043 ret = drm_atomic_commit(state);
1044
1045out_state:
1046 if (ret == -EDEADLK)
1047 goto backoff;
1048
1049 drm_atomic_state_put(state);
1050out_ctx:
1051 drm_modeset_drop_locks(&ctx);
1052 drm_modeset_acquire_fini(&ctx);
1053
1054 return ret;
1055
1056backoff:
1057 drm_atomic_state_clear(state);
1058 drm_modeset_backoff(&ctx);
1059
1060 goto retry;
1061}
1062
1063static int drm_client_modeset_commit_legacy(struct drm_client_dev *client)
1064{
1065 struct drm_device *dev = client->dev;
1066 struct drm_mode_set *mode_set;
1067 struct drm_plane *plane;
1068 int ret = 0;
1069
1070 drm_modeset_lock_all(dev);
1071 drm_for_each_plane(plane, dev) {
1072 if (plane->type != DRM_PLANE_TYPE_PRIMARY)
1073 drm_plane_force_disable(plane);
1074
1075 if (plane->rotation_property)
1076 drm_mode_plane_set_obj_prop(plane,
1077 plane->rotation_property,
1078 DRM_MODE_ROTATE_0);
1079 }
1080
1081 drm_client_for_each_modeset(mode_set, client) {
1082 struct drm_crtc *crtc = mode_set->crtc;
1083
1084 if (crtc->funcs->cursor_set2) {
1085 ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0);
1086 if (ret)
1087 goto out;
1088 } else if (crtc->funcs->cursor_set) {
1089 ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0);
1090 if (ret)
1091 goto out;
1092 }
1093
1094 ret = drm_mode_set_config_internal(mode_set);
1095 if (ret)
1096 goto out;
1097 }
1098out:
1099 drm_modeset_unlock_all(dev);
1100
1101 return ret;
1102}
1103
1104/**
1105 * drm_client_modeset_check() - Check modeset configuration
1106 * @client: DRM client
1107 *
1108 * Check modeset configuration.
1109 *
1110 * Returns:
1111 * Zero on success or negative error code on failure.
1112 */
1113int drm_client_modeset_check(struct drm_client_dev *client)
1114{
1115 int ret;
1116
1117 if (!drm_drv_uses_atomic_modeset(client->dev))
1118 return 0;
1119
1120 mutex_lock(&client->modeset_mutex);
1121 ret = drm_client_modeset_commit_atomic(client, true, true);
1122 mutex_unlock(&client->modeset_mutex);
1123
1124 return ret;
1125}
1126EXPORT_SYMBOL(drm_client_modeset_check);
1127
1128/**
1129 * drm_client_modeset_commit_locked() - Force commit CRTC configuration
1130 * @client: DRM client
1131 *
1132 * Commit modeset configuration to crtcs without checking if there is a DRM
1133 * master. The assumption is that the caller already holds an internal DRM
1134 * master reference acquired with drm_master_internal_acquire().
1135 *
1136 * Returns:
1137 * Zero on success or negative error code on failure.
1138 */
1139int drm_client_modeset_commit_locked(struct drm_client_dev *client)
1140{
1141 struct drm_device *dev = client->dev;
1142 int ret;
1143
1144 mutex_lock(&client->modeset_mutex);
1145 if (drm_drv_uses_atomic_modeset(dev))
1146 ret = drm_client_modeset_commit_atomic(client, true, false);
1147 else
1148 ret = drm_client_modeset_commit_legacy(client);
1149 mutex_unlock(&client->modeset_mutex);
1150
1151 return ret;
1152}
1153EXPORT_SYMBOL(drm_client_modeset_commit_locked);
1154
1155/**
1156 * drm_client_modeset_commit() - Commit CRTC configuration
1157 * @client: DRM client
1158 *
1159 * Commit modeset configuration to crtcs.
1160 *
1161 * Returns:
1162 * Zero on success or negative error code on failure.
1163 */
1164int drm_client_modeset_commit(struct drm_client_dev *client)
1165{
1166 struct drm_device *dev = client->dev;
1167 int ret;
1168
1169 if (!drm_master_internal_acquire(dev))
1170 return -EBUSY;
1171
1172 ret = drm_client_modeset_commit_locked(client);
1173
1174 drm_master_internal_release(dev);
1175
1176 return ret;
1177}
1178EXPORT_SYMBOL(drm_client_modeset_commit);
1179
1180static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode)
1181{
1182 struct drm_device *dev = client->dev;
1183 struct drm_connector *connector;
1184 struct drm_mode_set *modeset;
1185 struct drm_modeset_acquire_ctx ctx;
1186 int j;
1187 int ret;
1188
1189 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
1190 drm_client_for_each_modeset(modeset, client) {
1191 if (!modeset->crtc->enabled)
1192 continue;
1193
1194 for (j = 0; j < modeset->num_connectors; j++) {
1195 connector = modeset->connectors[j];
1196 connector->funcs->dpms(connector, dpms_mode);
1197 drm_object_property_set_value(&connector->base,
1198 dev->mode_config.dpms_property, dpms_mode);
1199 }
1200 }
1201 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
1202}
1203
1204/**
1205 * drm_client_modeset_dpms() - Set DPMS mode
1206 * @client: DRM client
1207 * @mode: DPMS mode
1208 *
1209 * Note: For atomic drivers @mode is reduced to on/off.
1210 *
1211 * Returns:
1212 * Zero on success or negative error code on failure.
1213 */
1214int drm_client_modeset_dpms(struct drm_client_dev *client, int mode)
1215{
1216 struct drm_device *dev = client->dev;
1217 int ret = 0;
1218
1219 if (!drm_master_internal_acquire(dev))
1220 return -EBUSY;
1221
1222 mutex_lock(&client->modeset_mutex);
1223 if (drm_drv_uses_atomic_modeset(dev))
1224 ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON, false);
1225 else
1226 drm_client_modeset_dpms_legacy(client, mode);
1227 mutex_unlock(&client->modeset_mutex);
1228
1229 drm_master_internal_release(dev);
1230
1231 return ret;
1232}
1233EXPORT_SYMBOL(drm_client_modeset_dpms);